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Canon NP7161 User's Manual

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1. wire f Primary Charging Assembly Transfer Charging Assembly nes Ha 7 6 Figure10 212a Figure 10 212b 4 Free alength of about 5 cm of charging wire 0 06 mm dia from the reel and form a loop at the end 2 mm dia Note To form a loop easily wind the charging wire around a hex key once then turn the hex key three to four times and twist the charging wire 5 Cut the excess end of the twisted charging wire with a nipper 6 Hook the loop on the charging electrode at the rear EJ IP Figure 10 213 7 Hook the charging wire on the charging wire positioner at the rear then pull on the charging wire as indicated and hook the charging wire tension spring on the charging wire by the distance then twist it A e Primary charging assembly 13 0 0 5 mm Transfer charging assembly 12 0 0 5 mm COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 11 mm CHAPTER 10 TROUBLESHOOTING Figure 10 214 8 Cut the excess charging wire with a nipper 9 Pick the end of the charging wire tensioning spring with tweezers and hook it on the charging electrode BN pss F 4 agg Figure 10 215 m Note Go through the following e Be sure that the charging wire is
2. Start key Jam indicator ON flashed V V Sequence STBY INTR SCFW SCRV SCFW SCRV S a approx si approx Registration roller clutch CET ay 5 Delivery paper sensor PS6 Normal peer Main motor M1 eS Figure 5 504 4 Delivery Stationary Jam Start key Jam indicator ON flashed V V Sequence STBY INTR SCFW SCRM SCFW SCRV LSTR S 1 1 Jam check I Registration roller clutch CL1 NENNEN S Delivery paper sensor PS6 normal Eu NENNEN Main motor M1 5 14 COPYRIGHT 1998 CANON INC 1 Varies according to paper size Figure 5 505 CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 5 PICK UP FEEDING SYSTEM VI DISASSEMBLY ASSEMBLY The copier may be disassembled and assembled as shown here Pay attention to the copier s mechanical characteristics along with the steps for disassembly assembly Important 1 Turn off the power and disconnect the power plug to ensure safety whenever disassembling assembling the copier 2 Unless otherwise noted assemble the parts by reversing the steps used to disassemble them s Identify the screws by type length diameter to avoid use in the wrong location 4 Usea washer where needed The mounting screws used for the grounding wire and varistor come with a washer to ensure electric con
3. 7 13 I9mmoo Copyboard Glass 7 14 FANS m 7 15 Counter Assembly 7 18 Main Motor Assembly 7 18 DC Controller PCB 7 19 Removing the Power Supply PCB 7 20 Removing the High Voltage Power Supply 7 20 Lamp Regulator 7 21 CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON G CHAPTER 7 EXTERNALS AUXILIARY MECHANISMS mm l FANS The copier is equipped with three fans for cooling and discharging ozone When a sorter is installed the vent for the exhaust fan FM2 is blocked preventing discharge of ozone to the left of the copier To enable discharge use a sorter kit fan FM5 to the front of the copier to route the ozone from the exhaust fan FM2 FMA to the front Table 7 101 shows the function of each fan and the orientation of the fan Figure 7 102 shows the timing at which each fan turns on Figure 7 101 Notation Name Orientation Filter Function FM1 Cooling fan 1 Blowing Air Cools the scanner FM2 Exhaust fan 1 Drawing Ozone Discharges exhaust FM4 Exhaust fan 2 Drawing Ozone FM5 E Sorter kit fan Drawing Air 1 If a sorter kit is installed Table 7 101 COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1
4. 22 21 Figure 8 514 23 CN3 CN2 Figure 8 515 8 20 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 8 INSTALLATION 17 Check if the device is capable of ringing up the computer at the service station Press the push switch 18 SW4 24 lem A press will turn on LED6 24 red it will turn off upon completion of LED1 LED2 LED3 E 2 0000000 o La a PA oz all transmission and it will flash upon failure Another press on the push switch SW4 18 while LED6 24 is flashing will initiate transmission once again A press on the push switch SW1 25 while LED 6 24 is flashing will cancel transmission attempts Figure 8 516 18 Check to make sure that the communication with the copier is normal Connect the copier s power plug and turn eee 2 on the power switch to see that LED2 26 orange flashes a 3 19 Press the copier s Copy Start key so that 27 LED3 27 pink flashes in response LEDI LED2 LED3 Figure 8 518 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 8 21 mmE CHAPTER 8 INSTALLATION 20 Attach the switch
5. He Figure 6 203 6 8 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON ES CHAPTER 6 FIXING SYSTEM 3 Remove the drum unit See p 4 28 4 Remove the delivery upper cover See p 7 11 5 Remove the delivery lower cover See p 7 11 e cu 6 Disconnect the two connectors 2 J108 J109 on the DC controller PCB and free a RE the wires from the harness guide 7 Remove the front door 4 3 6 8 Turm the screw 3 counterclockwise and remove the fixing knob 4 9 Remove the two mounting screws 5 and remove the fixing front cover 6 10 Disconnect the connector 7 and free the harness from the harness guide 11 Remove the two mounting screws 8 Figure 6 206 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 6 9 mmm CHAPTER 6 FIXING SYSTEM 12 Lift the front of the fixing assembly 9 slightly to remove r Caution When removing the fixing assembly take care not to damage the feeding assembly 4 Removing the Fixing Heater 1 Remove the fixing assembly See p 6 8 2 Disconnect the two connectors 1 and free the harness from the harness guide 3 Remove the mounting screw 2 and detach the heater support plate front 3 4 Re
6. DELIVERY THS PAPER SENSOR SP PR lt GND_SRT2 3 OP CSTS 1 24V_SRT2 GND SRT1 TRO 24V 1 o o 6 OP MTDR 7 GND AS RXD AS TXD 2 CSTS 0 GND 24V GND J951 ACCESORY POWER SUPPLY PCB AS CNTP TRANSFER GUIDE VZ1 3 OP DRDT 4 OPMB 5 OPMA 1 lt 1 2 8 1 2 13 afaa 1 a 4 OP CSTS 2 5 OP CSTS 3 6 OP CSTPD 7 OPPUSL 4 8 0P MA 3 9 0P VP CL 10 OP VPDT 1 1 CST WFDT 10 2 OP PDT TRQMLDT SL1 PS11 SL2 PS10 PS9 PS7 PS5 CASSETTE PICK UP RIGHT MULTI CL3 MULTI MULTI MULTI CL2 REGISTRATION PAPER SOLENOID DOOR FEED MULTI FEEDER FEEDER FEEDER FEED PAPER SENSOR OPEN SOLENOID FEED PAPER PAPER PAPER ROLLER SENSOR J755 SENSOR ROLLER WIDHT WIDHT SENSOR CLUTCH CLUTCH SENSOR 2 SENSOR 1 TONER SENSOR PS8 WASTE TONER FEEDING SCREW LOCKED SENSOR
7. Figure 4 323b Figure 4 323a 4 36 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A CHAPTER 4 IMAGE FORMATION SYSTEM G Developing Assembly 1 Removing the Developing Assembly 1 Open the front door and release the developing assembly 2 Remove the mounting screw 1 and remove the stopper 2 3 Pull the developing assembly 3 to remove Figure 4 324 Caution Take care not to damage the developing cylinder 2 Removing the Developing Blade 1 Remove the developing assembly 2 Remove the mounting screw 1 and the three hooks 2 then remove the developing front cover 3 4 3 Remove the three mounting screws 4 and detach the developing blade cover 5 Figure 4 326 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 4 37 mEmE CHAPTER 4 IMAGE FORMATION SYSTEM 4 Lift the front of the developing upper t6 cover 6 slightly and slide it in the m direction of the arrow to remove Figure 4 327 5 Place a newspaper or the like on the floor and empty the developing assembly of toner 6 Put copy paper between the developing blade and the developing cylinder 7 Remove the two mounting screws 7 and 8 remove the developing blade 8 r Caution When mounting the develo
8. Waste Drum Photosensitive Developing toner lt cleaning assembly container assembly 2 i sel es Multifeeder Fixing Separation Transfer assembly Pick u Copy t M tray control assembly Cassette 1 Pick up feeding assembly Cassette 2 Cassette feeding module accessory Figure 2 101 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 2 1 CHAPTER 2 BASIC OPERATION B Outline of the Electrical Circuitry The copier s major electrical mechanisms are controlled by the microprocessor on the DC controller PCB The ICs on the DC controller PCB are shown below IC121 ROM Controls copying sequence JC113 gate array Controls scanning lamp LA1 error detection Controls thermistor TH1 TH2 error detection Controls triac short circuit error detection Controls power at time of error Turns on off the scanning lamp LA3 Controls the I O port IC114 IPC NP7161 only Controls communication with the ADF and the sorter JC116 RAM Records settings data service mode etc IC117 RESET IC Resets at power on Figure 2 102 is a block diagram showing the relationship between the copier s major circuits Reference J M M BMR M M MM QU The NP7161 possesses a communications IC IPC on its
9. A 1 D SPECIAL TOOLS LIST B SIGNALS AND ABBREVIATIONS A 2 E SOLVENTS AND OILS C GENERAL CIRCUIT DIAGRAM A 5 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A GENERAL TIMING CHART A4 2 Copies 10096 AE Power switch Start key Leading edge Leading edge Power switch ON 120 C 160 C ON of 1st page of 2nd page OFF Y Y Y Y Y Sequence WMUP WMUPR STBY STBY 1 Wait indicator flashing Green 2 Fixing heater H1 Target temperature control 3 Main motor M1 4 Primary charging assembly 5 Transfer charging assembly 6 Static eliminator 7 Developing AC bias 8 Developing DC bias Voltage control 0 15 a Partial activation Scanning lamp LA1 0 8sec 0 4sec 12 Scanner motor M2 Forward Reverse 9 Pre exposure lamp LA2 10 Blank exposure lamp Scanner home position sensor PS1 14 Lens motor M3 E MS 45 Lens home position sensor PS2 16 Mirror motor M4 Mirror home position sensor PS3 18 Pick up solenoid SL1 0 5sec 0 5sec 19 Registration
10. Code Description Sensor 01 Registration delay jam 02 Registration stationary jam PS5 03 Registration paper sensor timing jam 04 Delivery delay jam PS6 05 Delivery stationary jam 06 Right door open jam PS11 07 Power on jam PS5 PS6 40 ADF jam 50 Sorter jam Table 10 702 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 85 mm CHAPTER 10 TROUBLESHOOTING Guide to ADF Jam History No 115 and ADF Jam Type No 117 The type of jam is indicated using the following codes in the 10 s and 1 s places In the case of the history the number corresponding to the keys on the keypad will be indicated in the 100 s place Description Separation extraction Separation delay Pick up delay Pick up leading edge skew Pick up stationary Pick up double feeding Pick up trailing edge skew Pick up trailing edge retreat Pick up fault leading edge Delivery delay Delivery stationary Open Door open Jam original page Double feeding Table 10 703 Guide to ADF Warning No 118 Description Tray sensor off Separation fault Separation skew Separation stopper override Original pages jam recovery pages mismatch Original page in excess of 100 Original extraction Original size error Table 10 704 Guide to Sorter Jam History No 116 and Sorter Jam Type No 121 The type
11. Comparator circuit Reference voltage circuit Light blocking plate Stopper Waste toner sensor light receiving unit Waste toner box Waste toner sensor light emitting unit Figure 4 206 4 18 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A CHAPTER 4 IMAGE FORMATION SYSTEM When as many as 100 copies A4 have been made during a pre waste toner full condition the DC controller PCB will identify the condition as waste toner full stopping to flash the Waste Toner indicator and instead keeping it on The copier will not accept the Start key while the Waste Toner indicator remains on Reference prune eu If the DC controller PCB identifies a waste toner full condition during continuous copying the copier will discharge copies being processed and turn on the Waste Toner indicator COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 4 19 EN CHAPTER 4 IMAGE FORMATION SYSTEM Iii E Control by the Cleaner Thermistor The copier is equipped with a thermistor cleaner thermistor TH3 used to detect overheating of the drum cleaner assembly and is designed to perform the following according to the temperature detected by the thermistor controlling the rotation of the exhaust fan See p 7 2 controlling the copying speed down sequence The cleaner therm
12. 10 88 C Troubleshooting Image Faults 10 29 F Adjust Mode 3 10 92 IV TROUBLESHOOTING Function Mode 4 10 94 MALFUNCTIONS 10 42 Option Mode 5 10 95 A Copier 10 42 l Counter Mode 6 10 97 V TROUBLESHOOTING FEEDING J Application Mode 7 10 98 PROBLEMS 10 66 VIII SELF DIAGNOSIS 10 99 Jams 10 66 A Copier sisses iriniacsrriuiennrinnidismidiaiasriuaa 10 99 B Faulty Feeding 10 69 B AD Fi ue cci reme erbe iine ead 10 103 VI ARRANGEMENT AND FUNCTIONS Co SONET Pepe 10 104 OF ELECTRICAL PARTS 10 70 D Cassette Feeding Module 10 104 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING l GUIDETO TROUBLESHOOTING TABLES The troubleshooting tables in this chapter are based on more commonly used troubleshooting flow charts Study the following for an idea of how you may take advantage of the tables EX AC power is absent Cause Checks Yes No Actions Power plug Is the power plug connected to NO Connect the power the power outlet plug Covers A
13. rr t e edente 1 16 B Cross Section 1 9 1 COPIST initi euin 1 9 CHAPTER 2 BASIC OPERATION l BASIC MECHANISMS 2 1 2 Inputs to the A Functional Construction 2 1 DC Controller 2 3 2 10 B Outline of the Electrical Circuitry 2 2 3 Inputs to the C Basic Sequence of Operations 2 4 DC Controller 3 3 2 11 1 Basic Sequence of Operations at F Outputs from the DC Controller 2 12 Power OM 2 4 1 Outputs from the 2 Basic Sequence of Operations at DC Controller 1 4 2 12 Copy Start is nine 2 6 2 Outputs from the D Main Motor M1 Control Circuitry 2 8 DC Controller 2 4 2 13 1 Outline terere 2 8 3 Outputs from the 2 2 8 DC Controller 3 4 2 14 3 Detecting an Error 2 8 4 Outputs from the E Inputs to the DC Controller 2 9 DC Controller 4 4 2 15 1 Inputs to the G Inputs to and Outputs from DC Controller 1 3 2 9 Accessories 1 1 2 16 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON lt CHAPTER 3 EXPOSURE SYSTEM l OUTLINE OF OPERAT
14. 4 32 Developing Assembly 4 37 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 4 IMAGE FORMATION SYSTEM mm I OUTLINE OF THE PROCESSES A Outline Figure 4 101 shows the copier s basic construction in reference to image formation Image formation consists of the following functions Scanning lamp control Primary corona current control Transfer control current control Separation static eliminator bias control Developing bias control Blank exposure lamp control Copy board glass N Lamp regulator A mirror LT PCB No 1 Scanning lamp LA Lens mirror i No 3 NS OL mm L SS N DL mirror No 6 IAE sensor Pre Blank mirror exposure exposure i qninor lamp LA2 lamp LA3 T y Primary Developing assembly corona Static Transfer eliminator corona assembly AE sensor output signal AE DATA DC controller PCB Figure 4 101 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 4 1 mmm CHAPTER 4 B Basic Sequence of Operations image formation system Start key ON IMAGE FORMATION SYSTEM Sequence STBY INTR SCFW SCRV SCFW SCRV LSTR STBY S Main motor M1 AER Primary charging assembly Developing DC bias D
15. Lens home position sensor PS2 DC controller PCB 10 48 COPYRIGHT 1998 CANON INC Is the lens home position sensor normal See the instructions on how to check the photointerrupters Check the wiring from the DC controller PCB to the sensor if normal replace the sensor Replace the DC controller PCB CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A CHAPTER 10 TROUBLESHOOTING 12 E220 Checks Actions Does the scanning lamp LA1 remain off See The scanning lamp fails to turn on Lamp regulator PCB Set the meter range to 30 VDC and connect Check the wiring from the DC the probes to J211 2 and J211 1 on controller PCB to the lamp the DC controller PCB Is the voltage regulator PCB if normal between the terminals when the scanning replace the lamp regulator lamp turn on about 5 V PCB DC controller PCB Replace the DC controller PCB 13 E261 Power supply PCB Replace the power supply PCB Is the problem corrected Power supply If E261 is indicated often frequency advise the user to install a frequency stabilizer 14 E710 E711 Cause Checks Actions Malfunction Turn off and then on the power switch Is the End problem corrected DC controller PCB Replace the DC controller PCB COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIM
16. r Caution Do not leave fingerprints or oils on the surface of the developing cylinder As necessary dry wipe the surface Figure 4 334 with lint free paper 4 40 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 5 PICK UP FEEDING SYSTEM This chapter explains the principles used from when copy paper is picked up to when a copy is delivered in view of the functions of electrical and mechanical units and in relation to their timing of operation It also shows how these units may be disassembled assembled and adjusted OUTLINE OF OPERATION Il PICK UP FROM THE CASSETTE A Pick Up Operation B Sequence of Operations pick up feeding C Operation of the Cassette Lifter D Detecting the Size of the Cassette PICK UP FROM THE MULTIFEEDER A Pick Up Operation B Detecting the Size of Paper in the Multifeeder C Sequence of Operations pick up from multifeeder COPYRIGHT 1998 CANON INC IV V V CONTROLLING THE REGISTRATION GLUT CHS uiti eines 5 11 DETECTING JAMS 5 12 A Outline 5 12 B Sequence of Operations jam detection 5 13 DISASS
17. 8 10 Put the toner cartridge over developing assembly and push it in fully to the rear COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON ES CHAPTER 8 INSTALLATION Work Checks remarks Push the toner cartridge from above Check to make sure that the opening tab of the lock it to the developing assembly toner cartridge has sprung to the front Pull the opening tab to the front until the STOP line is in view Tap lightly on the top of the toner cartridge so that the toner falls into the developing assembly Push in the grip of the developing The toner cartridge will detach itself from the assembly so that the toner cartridge developing assembly when the grip of the may be detached developing assembly is pushed in to its initial position Slide the developing assembly into the copier and turn the toner supply lever clockwise to lock the developing assembly in place Close the front door COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 8 11 CHAPTER 8 INSTALLATION Ill RELOCATING THE MACHINE If you need to relocate the machine by truck or any other means of transportation perform the following Work Checks Remarks Make a copy in Direct Take out all copy paper from the cassette Excute 403 in service mode The scanner lens and
18. B4 A4 B5R B5 5 Transparency recommended by Canon A4 LTR Colored paper recommended by Canon B4 A4 Label paper recommended by Canon A4 LTR e Heavy paper up to 128 g m May be used but may not feed properly COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 1 3 EE CHAPTER 1 GENERAL DESCRIPTION a Cassette Used 55 mm deep 500 sheets of 80 g m paper 250 sheets if B5 Copy tray 100 sheets approx plain paper 64 to 80 g m Non image width Leading edge Direct 2 0 1 0 mm Trailing edge Direct 2 5 1 5 mm Left right Direct 2 5 2 0 mm Auto clear Provided 2 min standard may be changed between 1 and 9 min in 1 min increments Auto power off Provided 30 min standard may be changed between 10 and 90 min in 10 min increments Auto pre heat Provided 15 min standard may be changed between 15 and 90 min in 15 min increments Accessories ADF G1 Cassette Feeding Module C1 MS CI e Stapler Sorter L1 Control Card IV N Remote Diagnostic Device II Applies to the NP7161 only COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 1 GENERAL DESCRIPTION 4 Others Temperature 7 5 to 32 5 C 45 5 to 90 5 F Operating Humidity 5 to 80 RH conditions Atmospheric 8
19. 10 19 3 After Replacing the DC Controller PCB 10 22 4 Checking the Photointerrupters 10 23 Ill IMAGE FAULTS 10 25 A Initial 10 25 1 Checking the Site Environment 10 25 2 Checking the Originals 10 25 3 Checking the Copyboard Cover and Copyboard Glass 10 25 4 Checking the Charging 10 26 5 Checking the Developing 10 26 6 Checking the Paper 10 26 7 Checking the Periodically Replaced Parts 10 26 8 iae etes 10 26 CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON ix B Image Fault Samples 10 28 C Troubleshooting Image Faults 10 29 1 The copy is too light halftone area only 10 29 2 The copy is too light including solid black area 10 30 3 The copy is too light entirely considerably 10 30 4 The copy has uneven density front side dark 10 31 5 The copy has uneven density front side light 10 31 6 The copy is foggy overall 10 32 7 The copy is foggy vertical 10 33 8 The copy has black lines vertical fuzzy thick 10 33 9 The copy has black lin
20. 7 Checking the Periodically Replaced Parts Replace those parts that have reached their service life as indicated in the Scheduled Servicing Chart and the Periodically Replaced Parts Table 8 Others Keep in mind that bringing in a copier from a cold to warm room as during installation in winter can cause condensation in its inside causing various problems a Condensation on the scanning system glass mirror lens etc can cause light images b Condensation in the charging system can cause electric leakage c Condensation on the pick up feeding guide plate can cause faulty feeding If condensation is noted dry wipe the part or leave the copier powered for about one hour r Caution If a discrepancy in density between separation side and rear light image of fogging occurs try to correct the problem by following the Image Adjustment Basic Procedure 10 26 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 27 EH CHAPTER 10 TROUBLESHOOTING B Image Fault Samples not available 10 28 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A CHAPTER 10 TROUBLESHOOTING C Troubleshooting Image Faults 1 The copy is too light halftone area only Scanner
21. A3 LNS COM EM 5V drive LNS B lbs Lens motor circuit A5 LNS B 1115 IC119 CPU 24V J103 J39 A7 MMR_COM 3 3 pls m 5 drive A8 MMR B al 4 Mirror motor circuit A9 MMR_B 11 5 Figure 3 202 3 4 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 3 EXPOSURE SYSTEM 3 Moving the Lens The lens and the No 4 No 5 mirror unit are moved with reference to the points at which the lens home position sensor PS2 and the mirror home position sensor PS3 turn on The number of pulses indicating the positions of the lens and the No 4 No 5 mirror applied to each motor is stored in memory by the microprocessor on the DC controller PCB When the lens and the No 4 No 5 mirror unit need to be moved the appropriate number of pulses that suits the selected reproduction ratio is generated When the lens and the No 4 No 5 mirror unit need to be moved in the direction of reduction e g from Direct to Reduce each motor is rotated in reverse first to move the lens and the No 4 No 5 mirror unit past the position found for the selected reproduction ratio Thereafter the motors are rotated in normal direction so as to move the lens and the No 4 No 5 mirror unit to their appropriate positions Ending the motor rotation when they are rotating in normal direction ensures accurate positioning of the lens and the No 4 No 5 mirror
22. Fill out the label that came with the drum unit and attach the label to the front cover of the drum unit Aft date 5 counter 182 notes date Datum compteur Z hler note Notiz Turn the toner supply lever clockwise to lock the developing assembly in place then close the copier top COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 8 5 CHAPTER 8 INSTALLATION D Cleaning the Parts and Making Checks Work Checks remarks Clean the charging wire using the primary charging wire cleaning lever Clean the charging wire using the transfer charging wire leaning lever Take out the static eliminator and Clean as if to sweep the inside of the groove of clean it using the static eliminator the static eliminator cleaner stored behind the front door Thereafter set the static eliminator and the static eliminator cleaner back to their initial positions Static eliminator cleaning brush Remove the inside cover 2 screws TUE Sto 8 6 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 8 INSTALLATION Work Checks remarks Take out the dust proofing glass 1 screw and dry wipe it with lint free paper Then mount it back to the copier Mount the inside
23. charging assembly Replace the high voltage cord High voltage power supply primary transfer Check the high voltage power supply primary transfer 22 The copy is solid black Checks Actions Does the scanning lamp remain on during copying operation NO Make checks according to the instructions under The scanning lamp fails to turns off COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 41 mm CHAPTER 10 TROUBLESHOOTING IV TROUBLESHOOTING MALFUNCTIONS A Copier 1 E000 Checks Actions Execute service mode 412 error clear to clear E000 Open the front door and the top unit and let the fixing roller cool sufficiently Turn off the power switch and disconnect and then connect the power plug Turn on the power switch Does the fixing heater turn on Caution Do not repeat the steps without cooling the fixing roller sufficiently or abnormal increase in the fixing temperature will damage the fixing roller and the separation claw See The Fixing heater fails to turn on Main thermistor TH1 Turn off the power switch and let the fixing roller cool sufficiently Turn on the power switch and select service mode 109 fixing main thermistor detection temperature display Does the reading remain unchanged at 109 After the check be sure to turn off the power swit
24. 202 In standby move the detecting lever by hand When the light blocking plate is PS4 5V When the light blocking plate is not at PS4 OV PS5 Registration paper sensor J107 A2 222 In standby move the detecting lever by hand When the light blocking plate is at PS5 5V When the light blocking plate is not at PS5 OV PS6 Delivery paper sensor J124 2 222 In standby move the detecting lever by hand When the light blocking plate is at PS6 5V When the light blocking plate is not at PS6 OV PS7 Multi paper sensor J107 A8 202 In standby move the detection lever by hand When the light blocking plate is at PS7 5V When the light blocking plate is not at PS7 OV PS8 Waste toner feeding screw locked sensor J106 10 223 In standby move the detecting lever by hand When the light blocking plate is at PS8 5V When the light blocking plate is not at PS8 OV PS9 Multi wide sensor 1 J107 A11 202 In standby move the slide guide by hand When the light blocking plate is at PS9 When the light blocking plate is not at PS9 PS10 Multi wide sensor 2 J107 A14 202 In standby move the slide guide by hand When the light blocking plate is at PS10 When the light blocking plate is not at PS10 511 Right door open sensor J107 B7 202 In st
25. 4 Remove the copyboard glass 3 Caution When mounting the NP7161 s copyboard glass make sure that the blue marking on the side of the glass is to the front left Figure 7 314 7 14 COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON G CHAPTER 7 EXTERNALS AUXILIARY MECHANISMS mm D Fans 1 Removing the Scanner Cooling Fan 2 1 Remove the two mounting screws 1 and _ detach the filter 2 EST ZT NE 2 Disconnect the connector 3 and remove the scanner cooling fan 4 Figure 7 316 COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 7 15 m CHAPTER 7 EXTERNALS AUXILIARY MECHANISMS 2 Removing the Exhaust Fan 1 Remove the developing assembly drum unit inside cover and delivery upper cover 2 Disconnect the two connectors 1 3 Remove the two mounting screws 2 and slide the exhaust fan assembly 3 to the front to remove 2 Figure 7 318 4 Disconnect the two connectors 4 and 4 remove the two exhaust fans 5 Caution When mounting the exhaust fan B assembly be sure to engage
26. Be sure to correct the cause that turned on the protection circuit before resetting Repeated short circuiting and resetting can cause the fuse built into the power supply PCB to melt COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 7 7 m CHAPTER 7 EXTERNALS AUXILIARY MECHANISMS Ill DISASSEMBLY ASSEMBLY The copier may be disassembled and assembled as shown here Pay attention to the copier s mechanical characteristics along with the steps for disassembly assembly Important 1 Turn off the power and disconnect the power plug to ensure safety whenever disassembling assembling the copier 2 Unless otherwise noted assemble the parts by reversing the steps used to disassemble them 3 Identify the screws by type length diameter to avoid use in the wrong location 4 Use a washer where needed The mounting screws used for the grounding wire and varistor come with a washer to ensure electric continuity Do not forget to use these washers 5 As a rule do not operate the copier with any of its parts removed 7 8 COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON G CHAPTER 7 EXTERNALS AUXILIARY MECHANISMS mm A External Covers 1 Front cover 2 Right door 5 3 Upper right cover 2 4 Right cover 2 5 Rear cover 5 6 Upper rear cover 4 7 Upper left cover 2 8 Delivery lower cover
27. GUIDE TO TROUBLESHOOTING TABLES oie tere e 10 1 A Image Adjustment Basic Procedure 10 3 B Points to Note for Scheduled Servicing 10 4 STANDARDS AND ADJUSTMENTS 10 5 A 10 5 1 Leading Edge Non Image Width blank exposure lamp off timing 10 5 2 Image Leading Edge Margin registration on timing 10 5 3 Left Right Registration cii c qe ene cen 10 6 B Exposure System 10 7 1 Routing the Scanner Drive Cable eet dez 10 7 2 Adjusting the Position of the Mirror 10 8 3 Adjusting the Tension of the Scanner Drive Cable 10 9 C Image Formation System 10 10 Ts QUININE este 10 10 2 Stringing the Charging Wires 10 10 3 Adjusting the Height of the Charging Wires 10 13 D Pick Up Feeding System 10 14 1 Adjusting the Pressure of the Separation Pad 10 14 COPYRIGHT 1998 CANON INC 2 Changing the Cassette Size AB INCH esses 10 14 E Fixing 10 16 1 Adjusting the Height of the Fixing Assembly Inlet Guide 10 16 2 Adjusting the Pressure of the Lower Roller nip 10 16 F Electrical System 10 18 1 Obtaining Optimum Exposure 10 18 2 AE Adjustment
28. LR 3 Remove the mounting screw 1 and remove the reflecting cover 2 D 2 Figure 4 302 4 24 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A CHAPTER 4 IMAGE FORMATION SYSTEM 4 Wrap both ends of the scanning lamp 3 with lint free paper Then remove the lamp while pushing toward the rear end Caution 1 Do not work if the surface of the scanning lamp is hot 2 Do not leave fingerprints on the surface of the scanning lamp 3 If the surface of the scanning lamp is soiled dry wipe it 4 Do not leave fingerprints on the reflecting cover 5 Do not deform the reflecting cover 2 Mounting the Scanning Lamp Mount the scanning lamp by reversing the steps used to remove it However keep the following in mind Orient the scanning lamp so that the side with the shorter boss to terminal length is toward the rear Orient the scanning lamp so that the boss is at the angle indicated in Figure 4 304 3 Removing the Thermal Fuse 1 Remove the scanning lamp 2 Remove the two mounting screws 1 and remove the thermal fuse 2 m Caution Mount the thermal fuse by reversing the steps used to remove it Be careful of the orientation of the fuse COPYRIGHT 1998 CANON INC Figure 4 303 Figure 4 305 CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 4 25 EN CHAPTER 4 IMAG
29. 2 Removing the Developing M 4 37 3 Removing the Developing Cylinder iure 4 38 CHAPTER 5 PICK UP FEEDING SYSTEM lt COPYRIGHT 1998 CANON INC OUTLINE OF OPERATION 5 1 PICK UP FROM THE CASSETTE 5 2 A Pick Up Operation 5 2 B Sequence of Operations pick up feeding 5 3 C Operation of the Cassette Lifter 5 4 D Detecting the Size of the Cassette 5 6 Vs 5 6 2 Detecting the Cassette Size 5 7 PICK UP FROM THE MULTIFEEDER 5 8 A Pick Up Operation 5 8 B Detecting the Size of Paper in the Multifeeder 5 9 C Sequence of Operations pick up from multifeeder 5 10 CONTROLLING THE REGISTRATION 5 11 DETECTING JAMS 5 12 A OWING 5 12 B Sequence of Operations Jam detectlon eee 5 13 1 Registration Delay Jam 5 13 2 Registration Stationary Jam 5 13 3 Delivery Delay Jam 5 14 4 Delivery Stationary Jam 5 14 DISASSEMBLY ASSEMBLY 5 15 A Pick Up Assembly 5 16 1 Removing the Pick Up Roller 5 16 2 Mounting the Pick Up Roller 5 16 3 Removing the Pi
30. 4 Remove the four mounting screws 5 and remove the pick up drive assembly 6 Removing the Pick Up Assembly Remove the separation roller assembly See p 5 18 Remove the registration roller assembly See p 5 23 Disconnect the connector 1 and remove the two screws 2 Figure 5 605 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 5 17 mgs CHAPTER 5 PICK UP FEEDING SYSTEM 4 Slide the pick up assembly 3 to the rear and remove the hook 5 Removing the Feed Roller 1 Remove the separation roller assembly 2 While holding the claw A move the feed roller 2 in the direction of the arrow to remove Q A 2 6 Removing the Separation Roller 1 Remove the cassette 2 Remove the right door See p 7 10 3 Remove the two mounting screws 1 and remove the separation roller assembly 2 Figure 5 608 5 18 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A CHAPTER 5 PICK UP FEEDING SYSTEM 4 Remove the roller cover 3 5 Remove the two bushings 4 and remove the two springs 5 6 While pushing the claw A with a flat blade screwdriver remove the separation roller 6 7 Mounting the Separation Roller Mount the separation roller
31. 4 13 B Basic Sequence of Operations Il DEVELOPING ASSEMBLY DRUM image formation system 4 2 CLEANER ASSEMBLY 4 14 C Controlling the Intensity of the A Outline 4 14 Scanning Lamp 4 3 B Detecting and Controlling 1s Qutline i 4 3 the Level of Toner 4 16 2 4 4 C Monitoring the Waste Toner 3 Protection Mechanisms 4 5 Feeding Screw 4 17 D Controlling the Primary Transfer Bias 4 6 D Monitoring the Waste Toner Box 4 18 1 Outline 4 6 E Control by the Cleaner Thermistor 4 20 2 Turning On Off the Primary 1 Copying Speed Down Transfer Bias ees 4 6 Sequence eene 4 20 E Controlling the Developing Separation F Auto Density Adjustment AE 4 21 Static Eliminator Bias 4 7 1 4 21 1 Outline 4 7 2 Measuring the Density 2 Turning On Off the Developing of the Original 4 21 DG Blas detecte een 4 8 11 DISASSEMBLY ASSEMBLY 4 23 3 Turning On Off the Developing A Scanning Lamp Assembly 4 24 AC Bias Separation Eliminator 1 Removing the Scanning Lamp 4 24 BIaS 4 9 2 Mounting the Scanning Lamp
32. A Copier As of August 1998 1 Transfer charging wire FY3 0040 000 60 000 2 Ozone filter exhaust FE5 3956 000 1 60 000 Or 1 yr r Note The above values are estimates only and are subject to change based on future data COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 9 1 mmm CHAPTER 9 MAINTENANCE AND SERVICING Il CONSUMABLES AND DURABLES Some of the parts of the copier may need to be replaced once or more because of wear or damage over the period of machine warranty Replace them when they fail A Copier Parts name Parts No As of August 1998 Expected life copies Remarks Scanning lamp FH7 3360 000 FH7 3361 000 120 000 120 000 120V Pick up roller FE5 4199 000 120 000 Feed roller RF5 2490 000 120 000 Separation roller RF5 2490 000 120 000 Multifeeder pick up roller FB1 8581 000 120 000 Multifeeder separation pad FES 4132 000 120 000 Static eliminator FL5 058 1 000 N 60 000 Come with the packing of drum unit Developing cylinder Fixing upper roller FM5 0721 000 FE5 3912 000 180 000 180 000 Fixing lower roller FE5 3905 000 180 000 Fixing upper separation claw FB1 7075 000 180 000 Fixing lower separation claw FA2 9037 000 180 000 r Note The above values are estimates only a
33. CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING 4 The copy has uneven density front side dark 5 The copy has uneven density front side light Checks Actions Perform the Image Adjustment Basic Procedure Is the problem corrected Developing assembly Are the developing rolls of the developing assembly in firm contact with the photosensitive drum Check the developing assembly locking lever Scanner Clean the scanning lamp reflecting plate side reflecting plate mirror lens and dust proofing glass Is the problem corrected Pre scanning lamp LA2 Does the pre exposure lamp remain on during copying Replace the pre exposure lamp 2 Replace the DC controller PCB Developing assembly Charging assembly Copy paper COPYRIGHT 1998 CANON INC Is the developing cylinder coated with a uniform layer of toner 1 Clean the tip of the blade of the developing assembly dry wiping 2 Clean the surface of the developing cylinder 3 Check to make sure that the toner inside the developing assembly is not displaced to one side 1 Clean all charging wires once again and check the height of the charging wires once again 2 Try replacing the copy paper CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 31 EH CHAPTER 10 TROUBLESHOOTING 6 The copy is fogg
34. CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 7 mm CHAPTER 10 TROUBLESHOOT IN GC tam 2 Adjusting the Position of the Mirror Be sure to adjust the position of the mirror as follows after you have mounted the scanner drive cable 1 Keep the mirror positioning tool nearby Arrange the mirror positioning tool FY9 3009 050 as shown to adapt it to the copier Figure 10 206a Rear Figure 10 206b Front 2 Fit the mirror positioning tool 1 to the No 1 mirror base and the No 2 mirror base both front and rear 3 Tighten the mounting screw 2 on the cable metal fixing of the No 1 mirror base both front and rear Figure 10 207a Rear Figure 10 207b Front 4 Detach the mirror positioning tool 10 8 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING 3 Adjusting the Tension of the Scanner Drive Cable Be sure to adjust the tension as follows after routing the scanner drive cable 1 Move the scanner to home position 2 Pull the center of the scanner drive cable with a spring gauge about 10 mm At this time adjust the position A of the tension spring 1 so that the reading of the spring gauge is 95 15 g Figure 10 208 A 1 1 An MN dI d Figure 10 209 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU
35. Checks Perform the Image Adjustment Basic Procedure Is the problem corrected Clean the mirror lens and dust proofing glass Is the problem corrected Yes No Actions YES End Developing assembly Are the rollers of the developing assembly in firm contact with the drum during copying operation Check the developing assembly locking lever Developing assembly Is the coating of toner on the developing cylinder even Check the developing assembly Lamp regulator PCB DC controller PCB COPYRIGHT 1998 CANON INC Replace the lamp regulator PCB Is the problem corrected CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON End Replace the DC controller PCB 10 29 EN CHAPTER 10 TROUBLESHOOTING 2 The copy is too light including solid black area 3 The copy is too light entirely considerably Cause Step Checks Yes No Actions 1 Perform the Image Adjustment Basic YES End Procedure Is the problem corrected 2 Turn off the power switch in the NO Goto step 7 middle of copying operation Then open the front door and open the top unit Is the toner image on the photosensitive drum before transfer more or less normal Transfer 3 Is the charging wire of the transfer NO 1 Hook the charging wire correctly char ging charging assembly hooked correctly 2 Adjust the height of the char g
36. S Registration paper sensor PS5 5 Registration roller clutch CL1 5 Multifeed roller clutch EE lO o Delivery paper sensor PS6 6 NENNEN 5 10 COPYRIGHT 1998 CANON INC Figure 5 303 CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 5 PICK UP FEEDING SYSTEM IV CONTROLLING THE REGISTRATION CLUTCH The registration clutch exerts the following control so as to match copy paper with the image on the photosensitive drum at a specific location Selected copy mode Control timing Image area on copy paper Remarks Standard copying A Page separation The size of margin MEE C varies to suit the Fit t selected reproduction ratio and copy paper entering Size The size of margin ON D is 21 6 mm maximum Copy paper Image area Drum Drum m a Image on drum zl a Image on drum Copy paper E Copy paper s k Copy paper behind image Copy paper ahead of on drum image on drum Figure 5 401 If centering is turned on in Fit Page mode control is exerted so that half of the trailing edge C resulting in relation to the selected reproduction ratio and copy paper size will be the leading edge margin The maximum leading edge margin in such cases however is 21 6 mm If centering is turned
37. The copier weighs about 42 kg 92 4 Ib Be sure to work in a group of two when lifting it A Unpacking Work Checks remarks Open the shipping box and take out the two cardboard boxes Open the cardboard boxes and take Check to make sure that none of the following is out the attachments missing copy tray power cord drum unit User s Manual waste toner case 3 pc waste toner case bag 4 pc top unit close label Holding the grips at the bottom both sides move the copier to the site of installation 8 2 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON ES CHAPTER 8 INSTALLATION B Removing the Metal Fixings Work Checks remarks Remove the packing tape cushioning Check to make sure that the covers are free of material protective sheet of the scratches and dents copyboard glass and protective sheet of the size index Slide out the cassette and remove the packing tape and the cushioning material from inside Slide the cassette into the copier Remove the two scanner fixing screws Scanner fixing na x Screws from the copier s left side Store away the scanner fixing screw for possible relocation of the machine Open the front door and shift up the opening closing lever to open the copier top Remove the metal fixing from the opening closing hook right You will not be using
38. While the original is being illuminated in Direct Enlarge mode as many LEDs both front and rear as suited to the selected paper size Table 4 101 are turned on to blank out the non image widths on the photosensitive drum LEDs number of Paper size A3 A4 279 x 482mm 11 17 LTR B4 B5 A5 LGL LTRR B5R A5R Table 4 103 4 Turning On the Blank Exposure Lamp in Multifeeder Mode When copies are made on paper picked up from the multifeeder the blank exposure lamp is turned on to suit the paper width obtained by combinations of the states of the multifeeder paper width sensors 1 and 2 PS9 10 see p 5 9 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 4 13 mmE CHAPTER 4 IMAGE FORMATION SYSTEM Il DEVELOPING ASSEMBLY DRUM CLEANER ASSEMBLY A Outline The developing assembly and the drum cleaner are rotated by the drive from the main motor M1 through drive gears The level of toner inside the developing assembly is monitored by the toner sensor TS1 when the amount drops below a specific level the copier turns on or flashes the Toner indicator on the control panel The drum cleaner assembly collects waste toner using the cleaning blade and moves it to the waste toner case using the waste toner feeding screw The waste toner feeding screw locked detection sensor PS8 serves to monitor the rotation of the waste t
39. mode to default settings UO1 Changing auto clear time Use it to set the auto clear time length between 1 an 9 min in 1 min increments Setting it to O disables the auto clear function 002 Changing auto power save time Use it to select an appropriate auto power save time length 10 15 20 30 40 50 60 or 90 min 8 lengths UOS Changing auto power off time Use it to select an appropriate auto power off time length 10 15 20 30 40 50 60 90 8 lengths U04 Fine adjusting Zoom Use it to adjust vertical and horizontal reproduction ratios over 5 grades in 0 2 increments Rang 1 0 to 1 0 in units of 0 2 Turning on off auto cassette change Use it to turn on off the auto cassette change function in which copying is continued by switching cassettes when the selected cassette runs out of paper N Enable auto cassette change OFF Disable auto cassette change Turning on off auto sort Use it to turn on off the auto sort function in which sorting takes place when making multiple copies of multiple originals using an ADF O N Enable auto sort OFF Disable auto sort 1 12 Turning on off ADF jam recovery Cleaning feeder COPYRIGHT 1998 CANON INC Use it to turn on off auto counting of originals in ADF jam recovery N Enable auto count OFF Disable auto count Use it to clean the feeder after placing paper in the ADF
40. on the control panel Press 4 on the numeric keypad and press the AE key e The copier enters FUNCTION mode and indicates 401 on the control panel Press 5 and 0 on the numeric keypad in sequence and press the Start key e The copier turns off once and initializes the RAM IC116 Press 1 of the keypad and the Start key in sequence e The power turns off and the data in RAM IC116 will be initialized Enter the settings of each service mode by referring to the service mode label kept behind the front door Press the Reset key to end service mode 10 22 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING 4 Checking the Photointerrupters The copier allows you to use its service mode when checking its photointerrupters You may also use a conventional meter 1 2 3 4 5 1 2 3 4 5 6 Using a Meter Put the copier in standby state Set the range of the meter to 30 VDC Connect the probe of the meter to J105 5 GND of the DC controller PCB Connect the probe of the meter to the appropriate terminal on the DC controller PCB indicated in the tables that follow Make checks as instructed Using Service Mode Press the User Mode key Press 2 and 8 of the keypad at the same time Hold them down for 0 5 sec or more Press the User Mode key once again e The copier starts
41. on the other hand turns on off the switch on the cassette size switch PCB according to how it is positioned The AB and Inch size notations are switched over by sliding the AB Inch switching lever AB Inch changing lever Cassette paper size display Cassette paper size changing block Cassette paper size setting knob AB Inch changing block Figure 5 207 5 6 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON HEEEEEm CHAPTERS5 PICK UP FEEDING SYSTEM 2 Detecting the Cassette Size The AB configuration and the Inch configuration are distinguished by the switch SW654 on the cassette switching PCB The size of the paper inside the cassette 1s identified with reference to the states on off of the switches SW651 through 653 on the cassette size switch PCB Table 5 201 shows the combinations used to identify specific paper sizes Cassette size switch PCB m Y IK CNN 0 rx Figure 5 208 Inch size SW654 1 Result of detection Result of detection SW651 No cassette LGL U2 LDR LTR No cassette B5 A4 A3 B4 LTR R U1 A4R No cassette No cassette Non AB Inch configuration sizes may be registered default sizes only in service mode 5 Table 5 201 COPYRIGHT 1998 CANON INC CANON NP7161
42. 1 Remove the rear upper cover 2 Disconnect the connector 1 and the two mounting screws 2 3 Slide the scanner motor 3 to the right to detach from the motor mount then move it to the cut off A to remove 3 12 COPYRIGHT 1998 CANON INC JON CY Figure 3 501 A Figure 3 502 CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 3 EXPOSURE SYSTEM 2 Removing the Scanner Drive Cable In standby state press the Reduce key so that the lens and the No 4 No 5 mirror unit move to 70 reproduction position Turn off the power switch and disconnect the power plug Caution Whenever you need to perform disassembly assembly work be sure to turn it off and disconnect its power plug 3 4 5 6 7 8 9 Remove the lens hood See p 3 20 Remove the scanner motor See p 3 12 Remove the control panel See p 7 13 Remove the upper left cover See p 7 11 Remove the upper right cover See p 7 10 Detach the lock support 1 from the connector base 2 Remove the two mounting screws 3 and pull out the connector base 2 1 2 Figure 3 503 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 3 13 mmE CHAPTER 3 EXPOSURE SYSTEM 10 Remove the three mounting scr
43. 2 Upper left cover 5 Front fixing cover 8 Lower inside cover 3 Upper delivery cover 6 Inside cover 9 Static eliminator Figure 1 302 1 8 COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 1 GENERAL DESCRIPTION B 1 1 1 2 3 4 5 6 7 8 9 Cross Section Copier 2 3 4 5 26 No 3 mirror No 2 mirror Scanning lamp No 1 mirror Copyboard glass Lens Pre exposure lamp Primary charging assembly Blank exposure lamp 10 No 6 mirror COPYRIGHT 1998 CANON INC st CE 5 well 6 7 8 9 10 11 12 13 14 15 or ld LO r 1 p 3 d A i ae _f 25 24 23 22 21 20 19 18 17 16 11 12 13 14 15 16 17 18 19 20 Dust proofing glass 21 Transfer charging assembly Developing cylinder 22 Separation static eliminator No 4 mirror 23 Heat discharging roller No 5 mirror 24 Lower fixing roller Multifeeder pick up roller 25 Upper fixing roller Feed roller 26 Delivery roller Separation roller Vertical path roller Pick up roller Registration roller Figure 1 303 CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 1 9 CHAPTER 1 GENERAL DESCRIPTION
44. 3 1 4 1 1 3 B1 specific level 1 T T Figure 2 107 2 10 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 2 BASIC OPERATION 3 Inputs to the DC Controller 3 3 DC controller PCB J531 J103 ant A4 24 3 p A3AE DATA AE sensor 2 3 A2IAE REF See p 4 21 4 4 J110 4ICSTSO SICSTS1 Cassette size 2105752 See p 5 7 switch PCB CSTS3 7r 4108 TH1 When the temperature of the fixing roller 2 increases the voltage lowers TH1 Main analog signal thermistor When the main thermistor is connected to the DC controller PCB 1 TH2 1 T Sub TH2 When the temperature of the fixing roller increases the voltage lowers thermistor L analog signal TH3 J23 J112 C 277 1 TICLTH When the temperature of the drum cleaner eie M assembly increases the voltage lowers d E LE analog signal Figure 2 108 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 2 11 CHAPTER 2 BASIC OPERATION ds F Outputs from the DC Controller 1 Outputs from the DC Controller 1 4 V Heater switch Power supply PCB DC controller PCB SW1 E Tak CB C D nn assette Drum heater H2 illii n J208 J105 accessory 5 Eg 2 os Casse
45. 3 Press the user mode key 4 Check to see that 1 is indicated 5 Press 4 on the numeric keypad 6 Check to see that 4 is indicated 7 Press the AE key 8 Check to make sure that 401 is indicated 9 Press the Start key to start stirring toner This mode lasts about 4 min While this mode is effective 401 is indicated upon completion 4 of 401 is flashed Caution While the mode remains on do not turn off the power or open the front door Execute service mode 403 drum unit installation mode Steps 1 Check to see that 401 is indicated 2 Press 3 on the numeric keypad 3 Check to see that 403 is indicated 4 Press the Start key to start drum unit installation mode 8 8 COPYRIGHT 1998 CANON INC This mode lasts about 40 sec While this mode is effective 403 is indicated upon completion 4 of 403 is flashed Caution While the mode remains on do not turn off the power or open the front door CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON ES CHAPTER 8 INSTALLATION Work Checks remarks While the toner is being stirred To switch the cassette between AB and Inch see perform the following the instructions under Changing the Cassette Size AB Inch See p 5 25 1 Set the cassette size to suit the needs of the user and put copy paper inside t
46. 4 25 4 Controlling the Developing 3 Removing the Thermal Fuse 4 25 DC Bias to a Specific Voltage B Exposure Assembly 4 26 to Suit Copy Density 4 10 1 Removing the Pre Exposure F Controlling the Blank Exposure Lamp 4 12 Blank Exposure Lamp 15 auro 4 12 Assembly 4 26 2 Turning On the Blank Exposure 2 Removing the Dust Proofing Lamp in Reduce Mode 4 13 Glass 4 26 3 Turning On the Blank Exposure 3 Cleaning the No 6 Mirror 4 27 Lamp in Direct Enlarge Mode 4 13 G Drm Unit ec o sas 4 28 vi COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 1 Removing the Drum Unit 4 28 2 Cleaning the Photosensitive DRUM P 4 29 3 Removing the Cleaner 4 29 D Primary Charging Assembly 4 30 1 Removing the Primary Charging Assembly 4 30 E Transfer Charging Assembly 4 31 1 Removing the Transfer Charging Assembly 4 31 F Charging Wire 4 32 1 Outline eese 4 32 2 Stringing the Charging Wires 4 32 3 Adjusting the Height of the Charging Wires 4 36 Developing Assembly 4 37 1 Removing the Developing Assetnbly 4 37
47. 41 The Set Control Card indicator fails to turn off 10 65 TROUBLESHOOTING FEEDING PROBLEMS iter 10 66 A Copy Jams 10 66 1 Pick Up Feeding Assembly 10 67 2 Fixing Delivery Assembly 10 68 B Faulty Feeding 10 69 1 Double Feeding 10 69 2 Wrinkles 10 69 ARRANGEMENT AND FUNCTIONS OF ELECTRICAL PARTS 10 70 A Sensors and Switches 10 70 B Motors Fans Clutches and Solenoids 10 72 C Heaters Lamps and Others 10 74 Ds POBS ES ems 10 76 E Variable Resistors Light Emitting Diodes and Check Pins by 10 77 CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 1 DC Controller PCB 10 77 D Display Mode 1 10 84 2 Power Supply PCB 10 80 E I O Display Mode 2 10 88 3 Lamp Regulator PCB 10 80 F Adjust Mode 3 10 92 4 High Voltage Power Supply Function Mode 4 10 94 disde oiiaii vas 10 81 Option Mode 5 10 95 VII SERVICE 10 82 l Counter Mode 6 10 97
48. 5 sec O N Enable drum cleaning OFF Disable drum cleaning f the drum cleaning settings in service mode No 519 is turned ON COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 1 13 EE CHAPTER 1 GENERAL DESCRIPTION a V ROUTINE MAINTENANCE BY THE USER Instruct the user to clean the following parts at least once a week 1 Copyboard Glass Wipe with a moist cloth moistened with water or mild detergent solution then dry wipe 2 Copyboard Cover Wipe it with a moist cloth moistened with water or mild detergent solution then dry wipe 3 Primary Charging Assembly Pull out and then push in the wire cleaner several times to clean the charging wire 4 Transfer Charging Assembly Pull out and then push in the wire cleaner several times to clean the charging wire 5 Static Eliminator If separation jams occur frequently clean the static eliminator using the special brush Cleaning need not be as often as every week 6 Waste Toner Box If the Waste Toner Box indicator on the control panel flashes or turns on replace the waste toner box 1 14 COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 1 GENERAL DESCRIPTION VI POINTS TO NOTE BY THE USER Toner Cartridge Instruct the user to dispose of any used empty toner cartridge according to governmental guidelines Waste Toner Box Instruct
49. 7 6 e f Figure 4 317a Figure 4 317b COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 4 33 as CHAPTER 4 IMAGE FORMATION SYSTEM Iii 4 Free a length of about 5 cm from the charging wire reel 0 06 mm wire Reference _ _ To form a loop wind the charging wire around a hex key once and turn the hex key three to four times then twist the charging wire 5 Cut the end excess of the twisted charging wire with a nipper 6 Hook the loop on the charging electrode E Ed Es at the rear Figure 4 318 7 Hook the charging wire on the charging wire positioner at the rear and hook the NS charging wire tension spring on the EN RS charging wire by the distance A then ps twist it A Figure 4 319 Primary charging assembly 13 0 0 5 mm Transfer charging assembly 12 0 0 5 mm 4 34 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 4 IMAGE FORMATION SYSTEM 8 Cut the excess charging wire with a nipper 9 Pick the end of the charging wire N um zm ge tensioning spring with tweezers and hook it on the charging electrode Figure 4 320 r Note Go through the following Besure that the charging wire is free of bending and twisting and its gold plating has not peeled e Be sure that the charging wire is in the V groove of the charging wire positi
50. AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON es CHAPTER 7 EXTERNALS AUXILIARY MECHANISMS mm 3 Removing the Upper Left Cover 1 Remove the copyboard glass 2 Remove the two mounting screws 1 and detach the upper left cover 2 4 Removing the Delivery Lower Cover 1 Open the copier top and remove the copy tray 2 Remove the two mounting screws 1 and detach the delivery lower cover 2 1 1 2 Figure 7 307 5 Removing the Delivery Upper Cover 1 Open the copier top and remove the inside cover 2 Remove the two mounting screws 1 and slide the delivery upper cover 2 to the front to remove Caution When mounting the delivery upper cover be sure to engage the two cut offs in the delivery upper cover with the copier s hooks Figure 7 308 COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 7 11 m CHAPTER 7 EXTERNALS AUXILIARY MECHANISMS 6 Removing the Lower Inside Cover 2 1 Remove the front door and the transfer charging assembly 2 Slide out the registration knob 1 to the front 3 Remove the mounting screw 2 4 Loosen the two mounting screws 3 and remove the lower inside cover 4 3 Figure 7 309 7 12 COPYRIGHT 1998 CANON
51. Adjust Inspect Intervals Unit Item every every Remarks 120 000 180 000 Externals Copyboard glass Copyboard cover Ozone filter Or 1 yr Scanner drive Scanner drive cable assembly front rear Scanner rail Use alcohol and apply lubricant Optical path Scanning lamp Use a blower brush No 1 to 16 mirrors If the dirt is excessive Dust proofing glass use alcohol Scanner reflecting cover Scanner side reflecting plate Lens Developing Developing assembly roll assembly Developing cylinder gt l gt Pb I gt Cleaner Waste toner box Replaced by the user in response to an alarm Pick up Pick up roller assembly Pick up feed roller Pick up separation roller Multifeeder pick up roller Multifeeder separation pad Feeding assembly Transfer guide Fixing assembly Fixing upper roller Fixing lower roller Separation claw Look for damage on the claw upper lower tip and for soiling by toner Heat roller gt DID DDD Delivery roller COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 9 5 EN CHAPTER 9 MAINTENANCE AND SERVICING Intervals Unit Item every every every Remarks 60 000 120 000 180 000 Others Transfer charging wire e Static eliminator e 9 6 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AU
52. B4 122 496 IV B4 A3 115 496 B5 A4 Specifications subject to change without notice 1 6 COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 1 GENERAL DESCRIPTION Reproduction mode Size Copy paper Copies min Direct 10096 11 x 17 279 x 432mm 11 x 17 9 LTR 297 x 216mm LTR 16 LGL 216 x 356mm LGL 11 LTRR 216 x 297mm LTRR 13 Reduce 64 7 11 x 17 2 LTRR LTRR 12 73 3 11 x 17 gt LGL LGL 11 III 78 6 LGL LTRR LTRR 200 STMTR gt 11 17 11 x 17 129 4 LTRR 9 11 x 17 11 x 17 Il 121 496 COPYRIGHT 1998 CANON INC LGL 11 x 17 Specifications subject to change without notice 11 x 17 CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON EE CHAPTER 1 GENERAL DESCRIPTION a lll NAMES OF PARTS A External View 2 3 4 51 6 7 12 11 10 9 8 1 Control panel 5 Upper right cover 9 Right door 2 Copyboard glass 6 Upper rear cover 10 Right cover 3 Copyboard cover 7 Multifeeder 11 Front door 4 Power switch 8 Waste toner box 12 Cassette Figure 1 301 1 2 9 4 5116 7 8 1 Copy tray 4 Lower delivery cover 7 Open close lever
53. CHAPTER 10 TROUBLESHOOTING 10 The copy has white spots vertical 11 The copy has white lines vertical Cause Checks Actions Fixing assembly Press the Copy Start key with the copyboard cover open and turn off the power switch while the copy paper is moving through the feeding assembly At this time does the copy image before it goes through the fixing assembly have white spots or lines 1 Clean the fixing assembly inlet guide 2 Check the upper fixing roller 3 Clean the separation claw Primary charging assembly Clean the primary charging wire grid plate and shield plate Is the problem corrected Clean the part thoroughly with alcohol If the dirt cannot be removed remove the charging wire Developing assembly Is the developing cylinder coated with an even layer of toner Check the edge of the blade of the developing assembly for paper lint Copy paper Try copy paper fresh out of package Is the problem corrected The copy paper is moist Instruct the user on the correct method of storing copy paper Photosensitive drum Are there scratches in the peripheral direction corresponding to the developing image Replace the drum unit If scratches are found be sure to identify the cause Blank exposure lamp LA3 DC controller PCB External light Is the blank exposure lamp LED corresponding to the white spot or line on the copy on while the sc
54. INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A CHAPTER 7 EXTERNALS AUXILIARY MECHANISMS mm B Control Panel 1 Removing the Control Panel 1 Open the copyboard cover and remove the two mounting screws 1 then detach the two ADF metal catches 2 2 Remove the inside cover 3 Remove the three mounting screws 3 4 Slide the control panel 4 to the front to remove then turn over the control panel 5 Disconnect the three connectors 5 and remove the control panel Figure 7 312 COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 7 13 m CHAPTER 7 EXTERNALS AUXILIARY MECHANISMS C Copyboard Glass 1 Removing the Copyboard Glass 2 1 Remove the two mounting screws 1 and detach the glass retainer right 2 1 E tl O SES ae 1 Figure 7 313 2 Slide the copyboard glass 3 to the right 3 Remove the two mounting screws 4 and detach the glass retainer left 5
55. In response to the DC power supply signal the power supply PCB generates 24 V and 5VU This condition turns on the AC power supply relay RL on the power supply PCB thereby making a switch over to the fixing heater and the lamp regulator PCB When the power switch is turned off the AC power supply relay RL on the power supply PCB switches over to the options heater The tolerance of DC voltage is as follows e 24 V 5 e 5 VU 5 7 5 VR 5 However the above applies only when the inaccuracy of AC input is limited to 10 r Caution Be sure to disconnect the power plug whenever you have to replace the DC controller PCB COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 7 5 m CHAPTER 7 EXTERNALS AUXILIARY MECHANISMS 3 Mirror Heater Cassette Drum Heater and Accessory Cassette Heater The following three heaters are made available as accessories to the copier designed to prevent condensation of the scanner and the drum and to keep paper inside the cassette dry Table 7 201 shows the function of each heater Figure 7 202 shows the timing at which each heater turns on Notation Name Function Mirror heater Prevents condensation on the scanner Cassette Drum heater Prevents condensation on the drum and keeps copy paper dry Accessory cassette heater Keeps copy paper dry Tab
56. JAPON 10 9 mm CHAPTER 10 TROUBLESHOOTING C Image Formation System 1 Outline As many as two charging wires are located around the photosensitive drum These charging wires are 0 06 mm in diameter 2 Stringing the Charging Wires Basically all charging wires are strung in the same way The following uses the primary charging wire as an example 1 Remove the mounting screw 1 and remove the stopper 2 and the grid plate 3 To remove the transfer charging assembly remove the three hooks a and remove the guide wire plate b Primary Charging Assembly Transfer Charging Assembly 1 LL A 1 if 3 b Figure 10 210a Figure 10 210b 2 Remove the sheet front 4 and the sheet rear 5 To remove the transfer charging assembly remove the sheet front c and the sheet rear d Primary Charging Assembly Transfer Charging Assembly 5 ej Figure 10 211a Figure 10 211b 10 10 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING 3 Remove the spring 6 and remove the charging wire 7 To remove the transfer charging assembly remove the spring e and remove the charging
57. LA1 is turned on at a specific intensity and the scanner is moved forward 70 mm to expose the original When the scanner has stopped the light reflected by the area shown in Figure 4 208 in reference to the original butting position is measured by the AE sensor photodiode whose output is sent to the DC controller PCB as the AE sensor output signal AE DATA Based on the signal the DC controller PCB computes the optimum level of the developing DC bias for copying and sends the result to the high voltage power supply PCB as the developing bias control signal DV DC CNT Area of AE detection 28 mm approx lt gt 56 L PP E Center of image approx gt 70 distance of scanner travel 20 mm Figure 4 208 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 4 21 as CHAPTER 4 IMAGE FORMATION SYSTEM Iii Figure 4 209 shows changes in the developing DC bias in relation to the density of different originals If the density of the original is higher darker than the Test Sheet and lower lighter than a newspaper the developing DC bias will vary between F5 0 and F7 5 in terms of Copy Density lever position If the original is lighter than the Test Sheet copies are made at an F5 0 equivalent 270 V if it is darker than a newspaper on the other hand copies are made at an F7 5 equivalent 400 V Develop
58. NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 5 7 mgs CHAPTER 5 PICK UP FEEDING SYSTEM Ill PICK UP FROM THE MULTIFEEDER A Pick Up Operation The presence absence of copy paper in the multifeeder is detected by the multifeeder paper sensor PS7 When the multifeeder is selected and the Start key is pressed the multifeeder solenoid SL2 turns on to butt the paper guide plate against the multifeeder pick up roller Then the multifeeder roller clutch CL3 turns on to transmit the drive of the main motor M1 to the multifeeder pick up roller A single sheet of copy paper is picked up from the stack by the work of the multifeeder pick up roller and the separation pad and is sent to the registration roller This sequence of operations is repeated for each pick up operation DC controller PCB D nn 5 Se Do og 25 oga AE 5 0 gt gO 90 Lee 97 o oO TD o LE of ORO Se E ES OF Su S285 325 322 o oc 202 Er Stopper gc OL E Multifeed 28 roller clutch CL3 Control ring Cam 76 Paper guide plate Multifeeder paper sensor PS7 Multifeed roller Pd Separation pad Paper guide plate Figure 5 301 5 8 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 5 PICK UP FEEDING SYSTEM B Detecting the Size of Paper in the Multifeede
59. No 4 No 5 mirror unit move to the position for transportation Turn off the power switch and disconnect the power plug from the power outlet Secure the scanner in place using the Use the screws two scanner fixing screws from the removed during left side of the copier installation work Take out the drum unit mount the The drum unit must be dummy drum transported separately Remove the copy tray Tape the front door multifeeder tray and cassette in place Place A3 copy paper on the copyboard glass and tape the copyboard in place 8 12 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 8 INSTALLATION mm IV INSTALLING THE CONTROL CARD IV N 1 Remove the screw 1 from the right side of the upper rear cover and detach the face cover 2 2 Cut off the face plate 3 3 Lead out the harness and disconnect the shorting connector 4 then connect the connector 5 of the Control Card IV N to the copier s connector 6 4 Push in the harness and the connector into the copier and install the Control Card IV N to the copier using the screw 7 27 SX ANNN fers 3 NNNNN X RER AAY 222 SAN Sent SS AAA SENS S SS ON NS S X SS SENSN SS ai AM a X AN SAAN SAN NN NN ANN Figure 8 403 5 Connect the cop
60. TH1 TH2 If either thermistor suffers an open circuit the CW input terminal of the differential amplifier circuit will be about 5 V At this time the voltage of the other thermistor will decrease as the surface temperature of the fixing upper roller increases gradually increasing the output of the differential amplifier circuit When the output of the differential amplifier circuit exceeds the value set on the comparator the comparator will send a signal to the gate array When the gate array detects the signal from the comparator for a specific period of time the DC controller PCB will cut off 24 V and AC power supply and at the same time will indicate E000 E002 or E003 If the connector of the main thermistor is not connected or both thermistors suffer an open circuit the microprocessor will not be able to detect any excess increases in the surface temperature of the fixing upper roller causing it to indicate E000 E002 or E003 on the control panel 3 Activation of the Fixing Heater H1 The fixing heater error signal HEAT ERR from the AC drier is monitored by IC113 on the DC controller PCB and its reading is compared against the fixing heater drive signal HEAT DR to find out whether the power to the fixing heater is normal or not If the microprocessor on the DC controller PCB identifies the state of the fixing heater to be faulty it will cut the power supplied to the fixing heater and at the same ti
61. and lint free Dry wiping then cleaning alcohol and lint free brush if excessive paper with lint free paper paper cleaning with alcohol moistened with alcohol Developing rol Cleaning Part Tool solvent Remarks Part Tool solvent Remarks Separation claw Lubricant and Cleaning Separation roller Cleaning upper lower lint free paper Feed roller Fixing upper roller Lint free paper Dry wiping Pick up roller Fixing lower roller Multifeeder pick up roller Transfer guide Moist cloth Cleaning Part Tool solvent Remarks Waste toner box Checking collecting 10 4 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING Il STANDARDS AND ADJUSTMENTS A Mechanical 1 Leading Edge Non Image Width blank exposure lamp off timing Select No 306 in service mode Make adjustments so that non image width on copies made of the Test Sheet in Direct is 2 0 1 0mm unit 0 21 mm settings to 500 2 0 1 0mm Figure 10 201 2 Image Leading Edge Margin registration on timing Select No 305 in service mode Make adjustments so that the image leading edge margin on co
62. and press the push switch 18 SW4 A press should turn off LEDS 19 red indicating that RAM clear has ended 12345678 Ll SW2 bits Settings SW2 1 OFF SW2 2 OFF SW2 3 ON SW2 4 ON Figure 8 512 SW2 5 OFF SW2 6 OFF SW2 7 See step 9 SW2 8 OFF Table 8 503 13 Shift bit 6 of the DIP switch 20 SW2 to OFF Figure 8 513 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 8 19 CHAPTER 8 INSTALLATION 14 Connect the telephone line to the device If the device is connected on its own connect the modular jack cable to the connector LINE 21 If the extension function of the device is used connect the existing telephone or fax to the connector TEL 22 and connect the telephone line to the connector LINE 21 15 Call the service station and request initial settings for the device Upon reception LED4 23 red will start to flash 16 Call the service station to find out whether the initial settings have been successfully made Otherwise execute RAM clear steps 11 through 13 once again and start over Caution Upon completion of each try check with the service station to make sure that the settings have been made successfully
63. and pressing the Start key CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON EE XX CHAPTER 1 GENERAL DESCRIPTION Notation Item Description Factory settings default U09 Changing Page Fit mode ratio Changing Page Fit mode centering Changing Page Fit mode non image width Use it to change the reproduction ratio used in Page Fit mode between 90 and 99 in 1 increments Use it to turn on off the centering function in Fit Page mode O N Enable centering OFF Disable centering Use it to turn on off the non image width function in Page Fit mode O N Enable create non image width OFF Disable do not create non image width 93 Correcting density Use it to select an appropriate standard value F5 for manual density adjustment between 17 and 6 24 grades Setting special paper mode Use it to select an appropriate fixing temperature control mode for special paper when pick up is from the multifeeder 0 Standard 1 Rough surface paper against poor fixing 2 Tracing paper against high temperature offset Drum cleaning mode Use it to turn ON OFF the drum cleaning function To remove dirt from the surface of the photosensitive drum toner is deposited on the surface after copying operation and the cleaning blade is used to collect the toner together with the dirt In addition LSTR is extended by 6
64. and scanner drive unit It also explains the timing at which these drive units are operated and shows how they may be disassembled assembled and adjusted l OUTLINE OF OPERATION 3 1 D Basic Sequence of Operations A Changing the Reproduction Ratio 3 1 SCANNEN RE 3 8 Il LENS DRIVE SYSTEM 3 3 E Scanner Movement in A Driving the Lens 3 3 Page Separation Mode 3 9 1 SCANNER DRIVE SYSTEM 3 6 IM OTHERS iii et netta 3 10 A Outline oiii 3 6 A Detecting the Original Size 3 10 B Scanner Motor Control Circuit 3 7 V DISASSEMBLY ASSEMBLY 3 11 C Relationship between Scanner Sensor A Scanner Drive Assembly 3 12 and Signals utate ratius 3 7 B Lens Drive Assembly 3 18 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 3 EXPOSURE SYSTEM mm I OUTLINE OF OPERATION A Changing the Reproduction Ratio The reproduction ratio in the axial direction of the photosensitive drum is varied by the lens drive system and the mirror drive system and that in the peripheral direction of the photosensitive drum is changed by the scanner drive system The lens drive system uses a lens array and as shown in Figure 3 101 the lens position and the optical length are varied to
65. by reversing the steps used to remove it and with the following in mind When mounting the separation roller be sure to fit the pin 1 in the groove 2 of the holder When mounting the roller cover be sure CO 3 Figure 5 609 Figure 5 610 6 A Figure 5 611 so that the roller cover will push against Figure 5 612 the bushing COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 5 19 mmm CHAPTER 5 PICK UP FEEDING SYSTEM B Multifeeder Assembly 1 Removing the Multifeeder Tray 1 Open the multifeeder tray and remove the face cover 1 using a flat blade screwdriver 2 Remove the guide pin 2 and remove the multifeeder tray 3 2 Removing the Multifeeder Assembly 1 Remove the rear cover and open the right door 2 Remove the lower inside cover See p 7 12 3 Disconnect the two connectors 1 and remove the mounting screw 2 Figure 5 615 5 20 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 5 PICK UP FEEDING SYSTEM 4 Disconnect the two connectors 3 and remove the three mounting screws 4 then detach the multifeeder assembly 5 L The two holes each _ upper lower are spare holes 3 Removing the Mul
66. cc A 8 Lubricant oil Lubricating scanner rail COPYRIGHT 1998 CANON INC Slicone oil CK 0551 20 g CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON Prepared by OFFICE IMAGING PRODUCTS TECHNICAL SUPPORT DEPT 1 OFFICE IMAGING PRODUCTS TECHNICAL SUPPORT DIV CANON INC Printed in Japan REVISION 0 AUG 1998 23715 5 1 Hakusan 7 chome Toride shi Ibaraki 302 8501 Japan Canon This publication is printed on 70 reprocessed paper PRINTED IN JAPAN IMPRIME AU JAPON 0998S0 7 1
67. closed securely This is not the copier s problem Inform the user accordingly Close the front door Is the rated voltage present between J204 1 and J204 3 on the DC controller PCB End Circuit breaker CB1 CB2 Press the button on the circuit breaker CB1 CB2 Is AC power supplied Power cord Replace the power supply cord Is AC power supplied End Check the wiring of the AC power line Check the connector for contact Is the fuse FU1 FU2 on the DC power supply PCB blown 125 V 5 A for 120 V model 250 V 2 A for 230 V model Remove the cause and replace the fuse Power supply PCB Set the meter range to 30 VDC and connect the meter probes to J105 4 and J105 5 on the DC controller PCB Is the voltage reading about 5 V Check the wiring from J105 on the DC controller PCB to the power supply PCB if normal replace the power supply PCB Is there continuity between J101 B15 on the DC controller PCB and J403 1 on the DC controller PCB Check the wiring Is there continuity between J212 1 on the DC power supply PCB and J106 2 on the DC controller PCB Check the wiring Control panel PCB DC controller PCB 10 52 COPYRIGHT 1998 CANON INC Replace the control panel PCB Is the problem corrected End Replace the DC power supply PCB CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON
68. faulty The surface temperature of the fixing upper roller exceeded 230 C The thermistor TH1 TH2 has poor contact or an open circuit The fixing heater H1 has an open circuit The thermal switch TSW1 has turned on The triac is faulty The DC controller PCB is faulty The surface temperature of the fixing upper roller does not reach 60 C within 10 after it exceeded 40 C The surface temperature of the fixing upper roller does not reach 80 C within 10 sec after it exceeded 60 C The surface temperature of the fixing upper roller does not reach 100 C within 10 sec after it exceeded 80 C The surface temperature of the fixing upper roller does not reach 120 C within 10 sec after it exceeded 100 C The thermistor TH1 TH2 has poor contact or an open circuit The fixing heater H1 has an open circuit The thermal switch TSW1 has turned on The triac is faulty The DC controller PCB is faulty The surface temperature of the fixing upper roller drops to 130 C or less after it reached the target temperature 160 C for standby COPYRIGHT 1998 CANON INC The triac has a short circuit The DC controller PCB is faulty CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON The triac is identified as having a short circuit 10 99 mm CHAPTER 10 TROUBLESHOOTING qu Code Cause Description E010 The main motor M1 is faulty The DC controlle
69. free of bending and twisting and its gold plating has not peeled e Be sure that the charging wire is in the V groove of the charging wire positioner n correct wrong Figure 10 216 10 Wipe the charging wire with lint free paper moistened with alcohol r Caution Do not use a cloth carrying metal powder for cleaning Do not use a moist cloth for cleaning Dry wipe with lint free paper then mount only after making sure that alcohol has completely evaporated 11 Mount the sheet front and the sheet rear 12 Mount the stopper and the grid plate For the transfer charging assembly mount the guide wire plate 10 12 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING 3 Adjusting the Height of the Charging Wires To adjust each charging wire turn its respective height adjusting screw A full turn on the screw will change the height of the primary charging wire by about 0 5 mm and that of the transfer charging wire by about 0 7 mm Height of charging wire mm Primary LE 0 2mm Transfer es 0 2mm Figure 10 217 Primary Charging Assembly 90 0 Height adjusting Height adjusting Screw Figure 10 218a COPYRIGHT 19
70. go 0 thereby cutting the supply of AC power to the lamp regulator PCB If an error is identified in the scanning lamp the DC controller PCB will cut the AC power to the lamp regulator and at the same time will indicate E220 on the control panel 4 4 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A CHAPTER 4 IMAGE FORMATION SYSTEM 3 Protection Mechanisms To prevent malfunction of the scanning lamp LA1 the copier is equipped with a fuse FUI If the temperature around the scanning lamp increases abnormally about 141 C or more because of a short circuit or the like the thermal fuse FU1 will melt to cut the power to the scanning lamp COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 4 5 EN CHAPTER 4 IMAGE FORMATION SYSTEM Iii D Controlling the Primary Transfer Bias 1 Outline Figure 4 108 shows the circuit used to control the primary transfer bias and the circuit has the following functions 1 Turning on off the primary transfer bias 2 Controlling the grid bias to a specific voltage 3 Controlling the primary shield current to a specific current To eliminate the effects of changes in the environment to corona charging the output to the primary charging assembly is controlled by controlling the shield current to a specific current The primary transfer bias is turned on off using the following
71. in place Figure 10 221 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 15 mm CHAPTER 10 TROUBLESHOOT IN GC timp E Fixing System 1 Adjusting the Height of the Fixing Assembly Inlet Guide 1 Loosen the two adjusting screws 1 and adjust the height of the fixing assembly inlet guides 2 1 Figure 10 222 2 Adjusting the Pressure of the Lower Roller nip If the nip is as indicated in Table 10 201 no adjustment is necessary If the nip is not as indicated change the position of the pressure spring 1 Figure 10 223 10 16 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING Caution a and c represent points 10 mm from both ends of copy paper C a Feeding direction N Center of lt 10 224 Dimensions Measurements b 4 8 0 3mm 0 5 mm or less Be sure both upper and lower rollers are sufficiently warm before taking measurements Table 10 201 a Measuring the Nip Before measuring the nip wait for 15 min after the end of warm up and make 20 A4 copies 1 Set A3 copy paper 2 Open the copier cover 3 Execute nip measurement mode service mode The above steps will delive
72. is designed to accommodate the following accessories NP7161 only ADF G1 Feeds a stack of original pages to the copyboard page by page In dr Control Card IV N MS C1 Stapler Sorter L1 Controls volumes Sorts and groups up to In addition to the functions of copying work 10 sets of pages automatically of a 10 bin sorter staples sorted pages automatically Cassette Feeding Module C1 Provides an additional cassette COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON iv COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CONTENTS CHAPTER 1 GENERAL DESCRIPTION I FEATURES utto ees 1 1 IV OPERATING THE MACHINE 1 10 Il SPECIFICATIONS 1 2 A Control 1 10 COPIEI c eie ii ete 1 2 B User Mode uen 1 12 T eere de 1 2 As Outline ort rene 1 12 2 Mechanisms 1 2 V ROUTINE MAINTENANCE 3 Performance 1 3 BY THE USER 1 14 4 Others 1 5 VI PONITS TO NOTE BY THE USER 1 15 NAMES OF 1 8 VII IMAGE FORMATION 1 16 A External View 1 8
73. jams See Table 10 705 Indicates the type of jam in the ADF Indicates the type of jam See Table 10 703 Indicates the type of warning for the ADF Indicates alarm codes of the ADF See Table 10 704 Indicates the version of the ROM of the ADF Indicates the version of the program 10 84 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON Description es CHAPTER 10 TROUBLESHOOTING Remarks Indicates the release number of the ROM of the ADF Indicates the release number of the program Indicates the type of jam in the sorter Indicates the type of jam in the sorter See Table 10 705 Indicates the tray warning for the sorter Indicates the alarm code for the sorter See Table 10 706 Indicates the stapling alarm for the sorter Indicates the alarm code for the sorter See Table 10 707 Indicates the version of the ROM of the sorter Indicates the release number of the ROM of the sorter Checks the keys on the control panel Indicates the version of the program Indicates the release number of the program See p 10 87 Guide to Jam Types No 101 and Jam History No 107 The type of jam is indicated using the following codes in the 10 s and 1 s places In the case of the history the number corresponding to the keys on the keypad will be indicated in the 100 s place
74. moves in reverse to home position 15 sec from start of forward movement and the end of reverse movement The output of the AE sensor will be indicated in the copy count indicator Check to make sure it is between 0 and 255 If not execute 303 AE slope adjustment in service mode 9 Press the Reset key to end service mode COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 19 mm CHAPTER 10 TROUBLESHOOTING b AE Scanning Intensity Adjustment If an optimum image cannot be obtained by executing 301 AE auto adjustment in service mode perform the following 1 Place a white background original on the copyboard glass and select AE and Direct 2 Make a copy and check the copy image 3 Select 302 AE scanning intensity adjustment in service mode The copy count indicator will indicate the present setting 4 Change the setting using the keypad or the key 1 A higher setting will increase the intensity making the copy image lighter 2 A lower setting will decrease the intensity making the copy image darker Intensity 1 2 Copy density Original Test Chart density Figure 10 226 5 Press the Start key to store the new setting Repeat steps 2 through 5 until an optimum image is obtained 6 Press the Reset key to end service mode 10 20 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU
75. off in Fit Page mode control is exerted so that the leading edge of copy paper and the leading edge of the image on the photosensitive drum match COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 5 11 mgs CHAPTER 5 PICK UP FEEDING SYSTEM V DETECTING JAMS A Outline The copier is equipped with the following two sensors used to check the movement of copy paper Registration paper sensor PS5 Delivery paper sensor PS6 Jams are identified in relation to the presence absence of copy paper over each sensor at such times as programmed in the microprocessor As soon as a jam is identified the microprocessor will immediately stop the operation and flash the Jam indicator on the control panel The microprocessor identifies any of the following conditions as a jam a Paper exists over a specific sensor at power on at end of warm up or during standby power on jam b Paper fails to reach a specific sensor within a specific period of time delay jam 1 Registration delay jam detected by the registration paper sensor PS5 2 Delivery delay jam detected by the delivery paper sensor PS6 c Paper does not move past a specific sensor within a specific period of time stationary jam 1 Registration stationary jam detected by the registration paper sensor PS5 2 Delivery paper stationary jam detected by the delivery paper sensor PS6 Registration Multife
76. power supply PCB Is the problem corrected Checks Check the wiring from the power supply PCB to the DC controller PCB if normal replace the DC controller PCB Actions Connector Are all connectors of the main motor M1 connected Connect the connectors Power supply PCB Turn on the power switch Set the meter range to 30 VDC and connect the probes to J209 4 and J209 3 on the DC controller PCB Is the voltage about 24 V See DC power is absent Main motor M1 DC controller PCB COPYRIGHT 1998 CANON INC Replace the main motor Is the problem corrected End Replace the DC controller PCB CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 45 mm CHAPTER 10 TROUBLESHOOTING 6 E013 Cause Checks Actions Waste toner feeding screw Is the flag of the waste toner feeding screw locked sensor rotating when the main motor is rotating Remove the drum unit and turn the feeding screw by hand If it rotates easily check how it is mounted If it does not turn replace the drum unit and remove the cause Waste toner feeding screw locked sensor PS8 DC controller PCB 7 E030 Cause Is the waste toner feeding screw locked sensor normal See the instructions on how to check the photointerrupters Checks Check the wiring from the DC controller PCB to PS8 if no
77. service mode and indicates 1 on the copy count indicator Press 2 and then the AE in sequence e The copier starts I O DISPLAY mode and indicates 201 Enter the appropriate service mode No indicated in the tables that follow and press the Start key Make checks as instructed Refer to the state of the copy count indicator LEDs Tables use 1 to indicate ON and 0 to indicate OFF EE 2a 1a on WEE QUEE ET 2b Bh 1b 1 tod 1 1 ae Eo qc c 1g a MEC D MOM c 2 Mie 1 PN P 2d id COMM Figure 10 228 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 23 mm CHAPTER 10 TROUBLESHOOT IN GC ppm Sensor Connector Service mode Checks Voltage PS1 Scanner home position sensor J103 B2 220 In standby move the scanner by hand When the light blocking plate is at PS1 5V When the light blocking plate is not at PS1 OV PS2 Lens home position sensor J103 B5 219 In standby move the lens by hand When the light blocking plate is at PS2 5V When the light blocking plate is not at PS2 OV PS3 Mirror home position sensor J103 B8 219 In standby move the No 4 No 5 mirror by hand When the light blocking plate is at PS3 5V When the light blocking plate is not at PS3 OV PS4 Cassette paper sensor J107 B12
78. the past format in respect of chapter organization As can be learned from the following comparison chapters 3 and 4 of the old format are divided into several chapters Chapters 2 through 9 for more detailed descriptions We hope that the new format will provide you with a better understanding of the machines for servicing work Old New Chapter 1 General Introduction Chapter 1 General Description Chapter 2 Coping Processes Chapter 2 Basic Operation Chapter 3 Operations and Timing Chapter 3 Exposure System Chapter 4 Mechanical System Chapter 4 Image Processing System Chapter5 Installation Chapter 5 Laser Formation System Chapter 6 Maintenance and Inspection Chapter 6 Image Formation System Appendix Chapter 7 Pick Up Feeding System Chapter8 Fixing System Chapter 9 Externals Auxiliary Mechanisms Chapter 10 Installation Chapter 11 Maintenance and Servicing Chapter 12 Troubleshooting Appendix IlOS VAv aiTOdi RDF VAYIaTOMOGSJ mELISDERRO y UCAY LaYVMEbUVC ERUCSBUZY MLWY EAV A27 vt EROH EAT 4 24 59 L MRE THO ES HL CWA SU IR UK Sle F S15 F 29 2H ASIE 3H 432 OUR FAR BRAH RAS ARM A BOR mx E nd BOR FARM BE FAR BOSE IG Weed frog HSB AAR BOR N M HAAR FOE dx 1152 RS GE FLE RH Printed in Japan Imprim au Japon INTRODUCTION This Service
79. the two EP hooks on the exhaust fan assembly a with the copier s cut offs HI 5 Figure 7 319 7 16 COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A CHAPTER 7 EXTERNALS AUXILIARY MECHANISMS mm 3 Remove the Ozone Filter 1 Open the top unit 2 Shift down the lever 1 and remove the ozone filter assembly 2 To Figure 7 320 3 Remove the ozone filter 3 3 Figure 7 321 COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 7 17 mm CHAPTER 7 EXTERNALS AUXILIARY MECHANISMS E Counter Assembly 1 Removing the Counter Assembly 1 Remove the control panel 2 Remove the two mounting screws 1 and remove the magnet 2 3 Disconnect the two connectors 3 and remove the two mounting screws 4 then detach the counter assembly 5 Caution When removing the magnet mark its position and mount it with reference to the markings Figure 7 322 F Main Motor Assembly 1 Removing the Main Motor Assembly 1 Remove the rear cover and the rear upper cover 2 Disconnect the connector 1 and remove the four mounting screws 2 3 Remove the two locking supports 3 and detach the main motor assembly 4 2 Figure 7 323 7 18 COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 R
80. the user to keep any waste toner box for collection during a servicing visit A Caution Do not dispose of the toner cartridge or the waste toner box into fire Toner can catch fire causing implosion or explosion COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 1 15 EE CHAPTER 1 GENERAL DESCRIPTION a VILIMAGE FORMATION A Outline The copier is constructed as shown in Figure 1 701 Copyboard glass NN LT Scanning lamp Developing eee m exposure Primary charging lamp assembly Fixing Pre A lamp SG Lens Pick up Co UK coal charging Pick up eliminator assembly cassette Figure 1 701 1 16 COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 1 GENERAL DESCRIPTION The copier s image formation processes consist of the following eight steps Step 1 Pre exposure Step 2 Primary charging negative DC Step 3 Image exposure Step 4 Development AC negative DC Step 5 Transfer negative DC Step 6 Separation curvature static eliminator Step 7 Fixing Step 8 Drum cleaning Static latent image formation block 2 Primary charging 8 Drum cleaning 3 Image exposure Flow of copy paper Rotation of drum Delivery 7 Fixing 6 Separation Multif
81. 0 key Stop key Number 1 key Start key Number 2 key Reduce key Number 3 key 1 1 key Number 4 key Enlarge key Number 5 key Paper Select key Number 6 key 96 key Number 7 key Zoom key Number 8 key Zoom key Number 9 key Reset key Fit Image key Additional Functions key Table 10 708 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 87 mm CHAPTER 10 TROUBLESHOOTING E 1 0 Display Mode 2 To select an item use the keypad To execute an item use the Start key To cancel an item use the Clear key Description Remarks Not used Indicates digit 4 Indicates the state of input See p 10 89 Indicates digit 5 Indicates digit 6 Indicates the state of input See p 10 89 Indicates the state of input See p 10 89 Indicates digit 7 Indicates the state of input See p 10 89 Indicates the voltage of the fixing main thermistor TH1 Indicates the detected voltage e g 2 78 V will be indicated as 278 Indicates the voltage of the fixing sub thermistor TH2 Indicates the detected voltage e g 2 78 V will be indicated as 278 Indicates the voltage of the AE sensor Indicates the detected voltage e g 2 78 V will be indicated as 278 Indicates the voltage of the cleaner thermistor TH3 Indicates th
82. 1 5 22 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON HEEEEE CHAPTERS5 PICK UP FEEDING SYSTEM C Registration Roller Assembly 1 Removing the Registration Roller Assembly G 1 Remove the developing assembly See p 4 37 2 Remove the drum unit See p 4 28 3 Remove the multifeeder assembly See p 5 20 4 Disconnect the connector 1 and remove the grip right 2 then detach the registration roller clutch 3 C d 5 Disconnect the connector 4 and remove the three mounting screws 5 then detach the registration roller assembly 6 Figure 5 623 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 5 23 mmm CHAPTER 5 PICK UP FEEDING SYSTEM D Cassette Assembly 1 1 2 3 4 5 Removing the Cassette Size Switch Remove the cassette Remove the delivery lower cover See p 7 11 Disconnect the connector 1 J110 of the DC controller PCB and remove the mounting screw 2 then free the harness from the harness guide Remove the mounting screw 3 and remove the stopper 4 Remove the cassette switch assembly 5 Remove the hook 6 and remove the cassette size switch 7 Caution When mounting the cassette size switch assembly check to make sure that the cassette s
83. 1 19 reri 10 51 20 AC power is absent 10 52 21 DC power supply is absent 10 53 22 The scanner fails to move 10 54 23 The lens fails to move 10 55 24 The mirror fails to move 10 55 25 The scanning lamp fails to turn on 10 56 26 The pre exposure lamp fails to turn on 10 57 27 The blank exposure lamp fails to turn on 10 57 28 Pick up fails cassette 10 58 29 Pick up operation fails multifeeder 10 59 30 The registration roller fails to rotate 10 59 31 The fixing heater fails to TUE hex 10 60 32 The Add Toner indicator does not flash turn on 10 60 33 The Add Toner indicator fails 10 TU TU OT secos derat reet rev cag 10 61 34 The Waste Toner Box Full i ndicator fails to flash turn on 10 61 35 The Waste Toner Box Full indicator fails to turn off 10 62 36 The Add Paper indicator fails to flash 10 62 37 The Add Paper indicator fails to turn off 10 63 38 The Jam indicator fails to IE CE 10 63 39 The Jam indicator fails to turn off 10 64 40 The Set Control Card indicator fails to turn 10 64
84. 1 exhaust fan at rear FM2 02 exhaust fan at fount 03 sorter kit fan FM5 Indicates a history of jams Indicates the most recent five jams A press on 1 through 5 keys will show the respective jams See Table 10 702 Indicates a history of errors Indicates the most recent five error codes A press on T through 5 keys will show their respective error codes and the number being pressed Indicates the temperature detected by the fixing unit C main thermistor TH1 Indicates the temperature detected by the fixing sub thermistor TH2 Indicates the temperature detected by the cleaner thermistor TH3 Indicates the output voltage of the AE sensor A press on the Start key will execute AE scanning The output voltage of the AE sensor is indicated in decimal notation using three digits e g 245 V will be indicated as 245 Indicates the version of the ROM Indicates the version of the program Indicates the release number of the ROM Indicates the release number of the program Indicates the jam history of the ADF Indicates the history of the most recent five jams A press on the 1 through 5 keys will indicate the type of their respective jams See Table 10 703 Indicates the jam history of the sorter Indicates the history of the most recent five jams A press on the 1 through 5 keys will indicate the type of their respective
85. 10 6 to 1013 3 hPa 0 8 to 1 0 atm pressure NP7160 NP7161 120V NLB xxxxx 120V UL NLD xxxxx source 127V NLC xxxxx 230V PHQ xxxxx PHS xxxxx Maximum 1 5 kW or less Power consumption Standby 0 135 kWh approx reference only Continuous 0 645 kWh approx reference only Copying 66 dB or less sound power level by ISO method Noise Standby 40 dB or less sound power level by ISO method Ozone 8 hr average 0 05 ppm or less Width 566 mm 22 3 in Dimensions Depth 54 mm 21 3 in Height 389 mm 15 3 in NP7160 NP7161 Weight 42 kg 92 6 Ib approx 42 kg 92 6 Ib approx Copy paper Keep wrapped and avoid humidity Consumables Toner Avoid direct sunlight and store at 40 C 85 or less Specifications subject to change without notice COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 1 5 EE CHAPTER 1 GENERAL DESCRIPTION a Reproduction mode Size Copy paper Copies min A3 297 x 420mm A3 9 A4 210 x 297mm A4 16 B4 257 x 364mm B4 11 100 B5 182 x 257mm B5 17 AAR 297 x 210mm 13 BSR 257 x 182mm 14 A4R 11 70 7 B4 B5R 13 Reduce ll B4 gt A4R 12 81 6 B4 10 86 5 A4 B5 ASR gt 200 Il A4R 141 496 B5R B4 A4R
86. 160 C Evens out the surface temperature of the upper fixing roller Stirs the toner inside the developing assembly Discharges copy paper if any inside the copier Starts copying operation when the surface temperature of the upper fixing roller reaches 140 C if Auto Start has been selected STBY standby COPYRIGHT 1998 CANON INC From when WMUPR ends until the Copy Start key is pressed Or from when LSTR ends until the power switch is turned off Waits for a press on an operation key Start key etc Table 2 101 CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON Turns on Auto Clear if no operation key is pressed i e resets to standard mode after a specific period of time 2 5 CHAPTER 2 BASIC OPERATION 2 Basic Sequence of Operations at Copy Start Start key ON Sequence STBY INTR SCFW SCRV SCFW SCRV LSTR STBYS AER 4 indi Green Orange Wait indicator nr Fixing heater H1 Target temperature control Main motor M1 Primary charging assembly Transfer charging assembly Static eliminator Developing AC bias Developing DC bias Voltage control u ut ut KE Pre exposure lamp LA2 Blank exposure lamp LAS Partial activation x Scanning lamp LA1 Scanner motor M2
87. 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 73 Em CHAPTER 10 TROUBLESHOOTING C Heaters Lamps and Others Figure 10 603 10 74 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING Name Notation Description Heater HI Fixing heater H2 Cassette drum heater accessory H3 Mirror heater accessory Scanning lamp Pre exposure lamp Blank exposure lamp Counter Total copy counter Accessory counter Fixing heater power supply control Thermal fuse Scanning lap overheating detection Thermal switch Fixing assembly overheating detection Thermistor Fixing roller surface temperature detection 1 Fixing roller surface temperature detection 2 Cleaner thermistor Ambient temperature detection Varistor Varistor Table 10 603 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 75 mm CHAPTER 10 TROUBLESHOOTING D PCBs 4 BON Figure 10 604 Name Description DC controller PCB Control panel PCB AE sensor Lamp regulator PCB Power supply PCB High voltage power supply PCB Waste toner sensor Cassette size switch PCB Accessory power supply PCB Table 10 76 COPYRIGHT 1998 CANON INC Sequ
88. 2 9 Delivery upper cover 2 The number in parentheses indicates the number of mounting screws used 1 Inside cover 2 2 Lower inside cover 3 The number in parentheses indicates the number of mounting screws used 6 7 3 Figure 7 302 Figure 7 303 COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 7 9 mm CHAPTER 7 EXTERNALS AUXILIARY MECHANISMS Remove the appropriate covers as follows when cleaning checking or repairing the inside of the copier Covers which may be detached by mere removal of mounting screws are omitted from the discussions 1 1 2 1 2 3 7 10 Removing the Right Door Open the right door Remove the four mounting screws 1 and remove the right door 2 and the paper guide 3 Caution When mounting the paper guide be sure to fit the foot of the spring 4 at the rear into its hole Removing the Upper Right Cover Open the top unit Remove the two mounting screws 1 and remove the right cover 2 Remove the two mounting screws 3 and remove the upper right cover 4 COPYRIGHT 1998 CANON INC E 2 1 2 Figure 7 305 CANON NP7160 NP7161 REV 0
89. 2 OFF SW3 3 ON ON selects push pulse for RDD circuit SW3 4 confihuration selscts dial pulse for RDD circuit confihuration sets dial pulse speed to 20 PPS sets dial pulse speed to 10 PPS Figure 8 509 reserved Table 8 501 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 8 17 mmE CHAPTER 8 INSTALLATION 10 Connect the power supply unit to the power plug and check to make sure that LEDI 16 green turns on 11 Execute RAM clear Set each bit of the DIP switch 17 SW2 as indicated in Table 8 502 and press the push switch 18 SW4 A press should turn on LEDS 19 red SW2 bits Settings SW2 1 OFF SW2 2 OFF SW2 3 OFF SW2 4 ON SW2 5 OFF SW2 6 ON SW2 7 See step 9 SW2 8 OFF Table 8 502 8 18 COPYRIGHT 1998 CANON INC 16 LED1 LED2 LED3 Sw2 SW Figure 8 510 Figure 8 511 CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON EE XCHAPTERG8 INSTALLATION 12 After making sure that LEDS 19 red has turned on set each bit of the DIP switch 17 SW2 as indicated in Table 8 503
90. 2 Fixing Delivery Assembly Cause Checks Actions Separation claw delivery assembly Is the separation claw worn deformed or soiled 1 Replace the separation claw 2 If dirt is found clean it Fixing assembly Upper lower fixing roller Heat discharging roller Is the upper lower fixing roller or the heat discharging roller deformed or damaged Replace the roller Paper guide Is the paper guide soiled with toner or the like Clean the paper guide Is the height of the paper guide correct Adjust the height Nip Is the lower roller pressure nip as indicated Adjust it Delivery assembly Delivery lever Does the delivery detecting lever move smoothly Adjust the lever so that it moves smoothly Delivery paper sensor PS06 Does the delivery sensor operate normally See the instructions on how to check the photointerrupters Replace the sensor Delivery roller drive assembly Leading edge margin 10 68 COPYRIGHT 1998 CANON INC Does the delivery roller move smoothly Check the delivery roller drive assembly Check the copy to see if it has a leading edge CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING B Faulty Feeding 1 Double Feeding Cause Checks Actions Separation pad Spring Is the separation pad deformed wor
91. 2ROT is not detected 0 5 sec after the exhaust fan FM2 FM4 starts to rotate error code E805 will be indicated on the control panel COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 7 3 mmm CHAPTER 7 EXTERNALS AUXILIARY MECHANISMS Il POWER SUPPLY A Outline of Power Supply Figure 7 201 is a block diagram showing distribution of power inside the machine Cassette Drum heater Accessory power supply PCB DC power circuit E DC controller PCB J208 1 24V Power supply PCB J210 1 45VU 8 24V V J209 4 24V Figure 7 201 7 4 COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A CHAPTER 7 EXTERNALS AUXILIARY MECHANISMS mm B Power Supply Circuitry 1 AC Power Supply AC power is supplied to the power supply PCB when the power plug is connected and the front door switch DS1 is turned on 2 DC Power Supply The power supply PCB provides three types of DC outputs 24 V 5 VR and 5 VU When the power plug is connected and the front door switch DS1 is turned on the power supply PCB supplies the DC controller PCB with 5 VR The copier uses a soft switch as its power switch so that it continues to supply the DC controller PCB with 5 VR even when the power switch is off When the power switch is turned on the CPU generates the DC power supply signal
92. 6 8 3 Disconnect the connector 1 and remove the mounting screw 2 then remove the cleaner thermistor 3 Figure 4 311 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 4 29 EN CHAPTER 4 IMAGE FORMATION SYSTEM D Primary Charging 1 2 3 4 Assembly Removing the Primary Charging Assembly Remove the drum unit See p 4 28 Pull the charging wire cleaning lever 1 slightly to the front Detach the hook 2 and detach the drum front cover 3 Remove the mounting screw 4 and remove the primary charging assembly 5 Figure 4 313 4 30 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A CHAPTER 4 IMAGE FORMATION SYSTEM E Transfer Charging Assembly 1 Removing the Transfer Charging Assembly 1 Open the copier top and remove the front door 2 Pull the charging wire cleaning lever 1 slightly to the front 3 Remove the mounting screw 2 and lift the stopper 3 to remove 4 Pull the transfer charging assembly 4 to the front to remove Figure 4 314 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 4 31 ms CHAPTER 4 IMAGE FORMATION SYSTEM Iii F Charging Wire 1 Outline As many as two charging wires are located around the photosensitive drum These chargi
93. 7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON C GENERAL CIRCUIT DIAGRAM EXHAUST EXHAUST COOLING PRE FAN 1 FAN 2 FAN1 EXPOSURE FM2 FM4 FM1 LAMP SCANNER LA2 MOTOR ta M2 HEATER SWITCH SW1 TO CC IVN a CONTROL PANEL PCB Lu 21 41 CASSETTE DRUM HEATER H2 z E CASSETTE HEATER H4 EXFANO DR CPY DNS SCFAN DR 8 EXFANO 2 SCFAN DT 7 PREXP DR 3 SC COM 9 GND MIRROR HEATER H3 NN ACCESSORY TOTAL TE 1 MIRROR COUNTER COUNTER SORTER KIT MIRROR LENS SCANNER MOTOR CNT2 BLANK EXPOSURE FIXING HEATER H1 FAN HOME HOME HOME M4 5 LENS MOTOR 22 RG CL FMS POSITION POSITION POSITION ls et M3 SENSOR SENSOR SENSOR 1 1 11 EXFAN1 DT 10 EXFAN1 DR N AR 2 2 o Ino 21 mE PS3 PS2 PS1 DS o z ln THERMO SWIITCH SW1 19 LMPDT 18 NC FT1 FT2 17 LMP 16 TNFDT TO S07 15 TROMLDT 10 14 DV DC CNT SCANNING THERMAL 13 DV DC DR LAMP LA1 FUSE FU1 12 DV AC CNT n 11 DV AC DR 14 ure 10 DR 15 9
94. 8 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 77 Em CHAPTER 10 TROUBLESHOOTING Item Remarks Use to change size Settings SW102 1 INCH ON ON A ON AB INCH OFF AB OFF Use to set power supply voltage ON 230V OFF 120V Use to set the accessory Settings counter No accessory counter Small size copy counter Large size copy counter ON Not used ON ON Large size copy counting method ON 2 counts OFF 1 count Table 10 605 Inch configuration 4R3E Ratio 200 200 0 11 17 129 496 LGL411 x17 121 496 100 100 0 LGL LTR 78 6 11 x17 LGL 73 396 11d 7 5LTR 64 7 50 50 0 Table 10 606 A configuration 2R2E Ratio 200 200 0 A4 4A3 141 496 100 100 0 A3 A4 70 7 50 50 0 Table 10 607 10 78 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING AB Inch configuration 4R4E Ratio 200 200 0 A4 LTR A3 B55B4 141 4 A4 LTR B4 122 4 B4 A3 B5 A4 LTR 115 4 100 100 0 A3 B4 A4 LTR B5 86 5 B4 A4 LTR 81 6 A3 A4 LTR B4 B5 70 7 50 50 0 Table 10 608 AB configuration 4R4E Ratio 200 200 0 A4 A3 B5 B4 141 496 A4 B4 122 4 B4 A3 B5 A4 115 4 100 100 0 A3
95. 8 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 4 IMAGE FORMATION SYSTEM This chapter discusses the principles of how images are formed It also explains the timing at which the various units involved in image formation are operated and shows how they may be disassembled assembled and adjusted l OUTLINE OF THE PROCESSES 4 1 A Outline ssseeeeeee 4 1 B Basic Sequence of Operations image formation system 4 2 C Controlling the Intensity of the Scanning Lamp 4 3 D Controlling the Primary Transfer Bias 4 6 E Controlling the Developing Separation Static Eliminator Bias 4 7 F Controlling the Blank Exposure Lamp 4 12 Il DEVELOPING ASSEMBLY DRUM CLEANER ASSEMBLY 4 14 OUO i th 4 14 B Detecting and Controlling the Level of Toner 4 16 ommoom ommg Monitoring the Waste Toner Feeding Screw 4 17 Monitoring the Waste Toner Box 4 18 Control by the Cleaner Thermistor 4 20 Auto Density Adjustment AE 4 21 ISASSEMBLY ASSEMBLY 4 23 Scanning Lamp Assembly 4 24 Exposure Assembly 4 26 Drum Uil trente ees 4 28 Primary Charging Assembly 4 30 Transfer Charging Assembly 4 31 Charging Wire
96. 98 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON Transfer Charging Assembly N e Height adjusting Screw Height adjusting screw e Figure 10 218b 10 13 mm CHAPTER 10 TROUBLESHOOT IN GC apm D Pick Up Feeding System 1 Adjusting the Pressure of the Separation Pad If double feeding or pick up failure occurs loosen the adjusting screw 1 and relocate the holder 2 to adjust the force of the separation pad tension spring If pick up occurs move the holder in the direction of A If double feeding failure occurs move the holder to in the direction of B Figure 10 219 2 Changing the Cassette Size AB INCH 1 Slide out the cassette 2 Loosen the mounting screw 1 on the left side of the cassette then slide the size switching block 2 to the desired size position and fix it in position AB 21 n E we oe INCH Figure 10 220 10 14 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING 3 Remove the mounting screw 3 then slide the size switching lever 4 to the desired size position and fix it
97. 998 PRINTED IN JAPAN IMPRIME AU JAPON 7 1 m CHAPTER 7 EXTERNALS AUXILIARY MECHANISMS The exhaust fan FM2 and the sorter kit fan FMS are rotated at half speed during standby to prevent heating inside the machine If the reading of the cleaner thermistor TH3 is 50 C or more 38 C or more if the sorter kit is installed all fans will be rotated at full speed Power switch Start key Power switch ON ON OFF Sequence WMUP WMUPR STBY INTR SCFW SCRV LSTR STBY S Cooling fan 1 FM1 Exhaust fan 1 FM2 Sikes OO Exhaust fan 2 FM4 Sorter kit fan FM5 O A 8 0 1 If sorter kit is installed Full speed rotation Half speed rotation Figure 7 102 The speed of the exhaust fans is switched between full speed and half speed by switching the drive voltage of the exhaust fans as shown in Figure 7 103 When the CPU generates FMON 1 24 V is supplied so that the exhaust fans FM2 FM4 FMS rotate at full speed In response to FMHLF 1 on the other hand 15 4 V will be supplied so that the exhaust fans FM2 FMS rotate at half speed FM DRIVE FM DETECT GND Fan DC controller PCB Figure 7 103 7 2 COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A CHAPTER 7 EXTERNALS AUXILIARY MECHANISMS mm If the heat exhaust fan rotation detection signal FM
98. A1 making the copies lighter Use it when performing AE adjustment Adjusts the copy density developing bias slope for AE mode 0 255 A higher setting will make the copies lighter Use it when performing AE adjustment Adjust the leading edge margin registration roller clutch activation timing A higher setting will delay pick up of copy paper in relation to the image thereby decreasing the leading edge margin unit 0 21 mm Adjusts the leading edge non image width blank exposure lamp LA3 de activation timing A higher setting will delay de activation of the lamp thereby increasing the leading edge non image width unit 0 21 mm Adjusts the leading edge registration on right pages in page separation registration roller clutch activation timing A higher setting will delay pick up of copy paper in relation to the image thereby decreasing the leading edge margin unit 0 21 mm Adjusts the leading edge margin on right pages in page separation mode blank exposure lamp LA3 de activation timing A higher setting will delay de activation of the lamp thereby increasing the leading edge non image width unit 0 21 mm Adjusts the trailing edge margin blank exposure lamp LA3 activation timing A higher setting will advance activation of the lamp thereby increasing the trailing edge margin unit 0 21 mm Adjusts the arching in multifeeder mode d
99. ANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 97 mm CHAPTER 10 TROUBLESHOOTING J Application Mode 7 To select an item use the keypad To execute an item use the Start key To change the value use the keypad or the and Zoom keys To store settings use the Start key To cancel an item use the Clear key Description Settings Remarks Adjusts the ADF original page stop 1 255 A lower setting will move the original page position stop position in the direction of delivery unit 0 116 mm 10 98 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON VIII SELF DIAGNOSIS The microprocessor on the copier s DC controller PCB is equipped with a function that CHAPTER 10 TROUBLESHOOTING checks the condition of the machine especially the condition of sensors It runs checks at such times as programmed and will indicate any fault it finds in the form of code A Copier Cause Description The thermistor TH1 TH2 has poor contact or an open circuit The fixing heater H1 has an open circuit The thermal switch TSW1 has turned on The triac is faulty The DC controller PCB is faulty The surface temperature of the fixing upper roller does not reach 40 C within 14 sec after power on The thermistor TH1 TH2 has a short circuit The triac is faulty The DC controller PCB is
100. B4 A4 B5 86 5 B4 A4 81 6 A3 A4 B4B5 70 7 50 50 0 Table 10 609 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 79 Em CHAPTER 10 TROUBLESHOOTING 2 Power Supply PCB 1 41 5 1209 J208 a 1 211 1 212 1 3 204 1 4 J206 2 1 J203 Figure 10 606 3 Lamp Regulator PCB 5 J503 1 VR1 VR2 1 6 J501 Figure 10 607 10 80 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING 4 High Voltage Power Supply PCB 1 2 1 2 J305 J304 J301 10 1 VR82 VR83 VR52 VR81 3 J302 1 4 J303 1 VR141 Q vps2 1 3 J306 Figure 10 608 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 81 mm CHAPTER 10 TROUBLESHOOTING Vil SERVICE MODE A Outline B 1 1 2 3 2 3 4 The copier s service mode is divided into the following seven Description DISPLAY DISPLAY ADJUST FUNCTION OPTION COUNTER APPLICATION Table 10 701 Using Service Mode Starting Service Mode Press the User Mode key f you are planning to make c
101. C Set the meter range to the 30 VDC and connect the probes of the meter to J106 4 and J105 5 on the DC controller PCB Does the voltage change from about 0 to 5 V when the Start key is pressed Replace the DC controller PCB CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON EE XX CHAPTER 10 TROUBLESHOOTING 26 The pre exposure lamp fails to turn on Cause Checks Actions Pre exposure lamp Set the meter range to 30 VDC and connect Check the wiring from the DC LA2 the probes to J104 A6 and J104 7 on controller PCB to the pre the DC controller PCB Does the voltage exposure lamp if normal change from 0 to 24 V when the Start key is replace the pre exposure lamp pressed DC controller PCB Replace the DC controller PCB 27 The blank exposure lamp fails to turn on Cause Checks Actions Blank exposure lamp Replace the blank exposure lamp Is the LA3 problem corrected DC controller PCB Check the wiring from the DC controller PCB to the blank exposure lamp if normal replace the DC controller PCB COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 57 mm CHAPTER 10 TROUBLESHOOTING HEINE NNI 28 Pick up fails cassette Cause Checks Actions Copy paper Are the size of the copy paper in the cassette and the size indicated by the cas
102. CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON Name Notation CHAPTER 10 TROUBLESHOOTING Description Toner sensor Photointerrupter Switch TSI Developing assembly toner level detection Scanner home position detection Lens home position detection Mirror home position detection Cassette paper detection Registration paper detection Delivery detection Multifeeder paper detection Waste toner feeding screw locked detection Multifeeder paper width detection 1 Multifeeder paper width detection 2 Right door open closed detection Heater switch accessory Front door switch Table 10 601 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 71 Em CHAPTER 10 TROUBLESHOOTING B Motors Fans Clutches and Solenoids J 0 SL 2 10 602 10 72 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING Notation Description MI Main drive M2 Scanner drive M3 Lens drive M4 No 4 No 5 mirror drive Cooling Heat discharge Heat discharge Heat discharge accessory Clutch Registration roller clutch Feeding clutch Multifeeder pick up clutch Solenoid Pick up solenoid Multifeeder pick up solenoid Table 10 602 COPYRIGHT
103. CB Actions Check service mode 106 E805 details while E805 is being indicated Make the checks in step 2 and later to identify the fan that caused the error Connector Are the connectors from the connector on the DC controller PCB to the exhaust fan proper Connect the connectors Exhaust fan FM2 FM4 FM5 DC controller PCB 19 E821 Ozone filter Replace the exhaust fan Is the problem corrected Checks Replace the ozone filter Is the problem corrected Check the wiring from the DC controller PCB to the exhaust fan if normal replace the DC controller PCB Cleaner thermistor TH3 DC controller PCB COPYRIGHT 1998 CANON INC Turn on the power switch and select service mode 111 clean thermistor detection temperature Do the reading remain as 111 Check the wiring from J112 on the DC controller PCB to the thermistor if normal replace the thermistor Replace the DC controller PCB CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 51 mm CHAPTER 10 TROUBLESHOOTING 20 AC power is absent Power cord Checks Is the power cord connected to the copier Actions Connect the cord Power plug Is the power plug connected to the power outlet Connect the power plug Main power supply Front door Is the rated AC voltage present at the power outlet Is the front door
104. CHAPTER 10 21 DC power supply is absent Cause Checks TROUBLESHOOTING Actions AC power supply Is the rated voltage present between J204 1 and J204 3 on the DC power supply PCB See AC power is absent Fuse power supply Is the fuse FU1 FU2 FU3 FU4 FU5 on PCB the power supply blown Wiring DC load Turn off the power switch and disconnect the power plug Disconnect J208 J209 J210 on the power supply PCB Connect the power plug and turn on the power switch At Remove the cause and replace the fuse Check the wiring and the connectors of the DC power supply line Power supply PCB this time is the voltage between the following terminals normal Output voltage J208 2 24V J208 5 5VU J208 5 5VR J209 3 24V Replace the power supply PCB COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 53 mm CHAPTER 10 TROUBLESHOOTING 22 The scanner fails to move Cause Checks Actions Belt Cable Are the scanner drive belt and cable routed Route the belt and cable correctly correctly and check the pulley Scanner path Is the scanner rail free of soiling and object Remove any dirt and object and does the scanner move smoothly when check for an object that may pushed by hand come into contact with the scanner As necessary clean and lubricate or repair N
105. COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 2 13 CHAPTER 2 BASIC OPERATION ds 3 Outputs from the DC Controller 3 4 DC contro BISCFAN DR B2 SCFAN DT Cooling fan 1 BIOIEXFAN1 DR Exhaust fan 1 BIVEXFAN1 DT B71EXFANO_DR BBIEXFANO DT Exhaust fan 2 Sorter kit fan accesory T Power supply PCB J29 J211 27 1 Registration J212 J106 roller clutch 1 2 6 22 3IRG CL J35 J796 J107 2 19 11 Feed roller clutch 1 2 10 ASIFEED CL J31 J797 2 1 7 pil 24V Multifeed roller clutch 1 2 6 B2IMLT CL Figure 2 111 2 14 COPYRIGHT 1998 CANON INC ller PCB See p 7 2 When 0 CL1 turns on When 0 CL2 turns on When 0 CL3 turns on CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 2 BASIC OPERATION 4 Outputs from the DC Controller 4 4 DC controller PCB J36 J40 J107 P 1 8 Bel 24V Pick u SeA SH 1 2 7 2 B9IPU SL When 0 SL1 turns on J30 J797 E 3n5 gj 24 Multifeed solenoid SEE 4 4 1 4 B4MLT SL When 0 SL3 turns on J33 J102 2m 1 a11 A424 Total counter CNT1 4 2 MOITONT DR When 0 CNT1 turns on J32 die ua 4 24 Accessory CNT2 counter 4 ARJOPCNT_DR Whe
106. DC controller PCB The copier communicates with the ADF and the sorter using the communications IC on each controller PCB IPC communication and the communications PCB on the DC controller PCB IPC communication 2 2 2 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 2 BASIC OPERATION Sensors Control Loads ller PCB Sensors DC controller PC Motos Switches Toner C119 sensor CPU Mr a gt Clutches sensor 1 121 Thermistors e ROM Solenoids 1C116 RAM ml Counter 1C117 Control RESET LEDs panel IC113 Charging GA assembly HVT IC114 Developing IPC cylinder Lamp Scanning regulator Power PCB amp supply i k Heaters Sensors Cassette relay Cassette feeding Switches module Sensors ADF controller PCB Switches L IPC Sensors Soret n c Stapler sorter Switches res IPE processor or Sorter Figure 2 102 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 P
107. E AU JAPON 10 49 mm CHAPTER 10 TROUBLESHOOTING 15 E712 Cause Checks Actions Malfunction Connector ADF PCB DC controller PCB 16 E717 Cause Turn off and then on the power switch Is the problem corrected Is the connector J754 used between the ADF and the copier connected securely Replace the ADF controller PCB Is the problem corrected Checks Connect the connector securely Replace the DC controller PCB Actions Malfunction Turn off and then on the power switch Is the problem corrected Connector DC controller PCB Remote Diagnostic Device II 10 50 COPYRIGHT 1998 CANON INC Is the connector J722 used between the Remote Diagnostic Device II and the copier connected securely Replace the DC controller PCB Is the problem corrected Connect the connector securely See the Service Manual of the Remote Diagnostic Device II CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON es CHAPTER 10 17 E800 Cause Checks TROUBLESHOOTING Actions Malfunction Power supply PCB DC controller PCB 18 E805 Turn off and then on the power switch Is the problem corrected Replace the power supply PCB Is the problem corrected Checks Check the wiring and continuity from the DC controller PCB to the control panel PCB if normal replace the DC controller P
108. E FORMATION SYSTEM do B 1 1 2 3 4 1 2 Exposure Assembly Removing the Pre Exposure Blank Exposure Lamp Assembly Remove the developing assembly See p 4 37 Remove the drum unit See p 4 28 Remove the inside over Disconnect the two connectors 1 and remove the mounting screw 2 then remove the pre exposure blank exposure lamp assembly 3 Removing the Dust Proofing Glass Remove the inside cover Remove the mounting screws 1 and remove the dust proofing glass 2 Cho LUE eZ wem OS Figure 4 306 Figure 4 307 4 26 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A CHAPTER 4 IMAGE FORMATION SYSTEM 3 Cleaning the No 6 Mirror 1 Remove the developing assembly See p 4 37 2 Remove the drum unit See p 4 28 3 Remove the dust proofing glass See p 4 26 4 Remove the mounting screw 1 and remove the developing assembly rail 2 5 Clean the No 6 mirror 3 Figure 4 309 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 4 27 EN CHAPTER 4 IMAGE FORMATION SYSTEM Iii C Drum Unit 1 Removing the Drum Unit 1 Open the top unit release the developing assembly 2 1 2 Remove the thumb screw 1 and slide SS o out the drum unit 2 t
109. EMBLY ASSEMBLY 5 15 A Pick Up Assembly 5 16 B Multifeeder Assembly 5 20 C Registration Roller Assembly 5 23 D Cassette Assembly 5 24 CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 5 PICK UP FEEDING SYSTEM OUTLINE OF OPERATION The copier uses a center reference feeding method in which copy paper is moved along the center of the pick up feeding path to ensure stable movement The pick up system consists of the cassette No 1 holder and the multifeeder Copy paper picked up from the cassette or the multifeeder is controlled by the registration roller so that it is aligned with the leading edge of the image on the photosensitive drum and is sent through the transfer separation and fixing assemblies and then to the copy tray As many as two sensors are used to monitor the movement of the copy paper Sensor Description Registration paper sensor Detects delay stationary jams measures paper length Delivery paper sensor Detects delay stationary jams Table 5 101 Fixing dee os assembly Photosensitive Multifeeder o wi o Y EC RC PS6 L Cassette Figure 5 101 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 5 1 mm CHAPTER 5 PICK UP FEEDING SYSTEM Il P
110. ER 10 TROUBLESHOOTING Remarks Scanner home position detection PS1 J103 B2 OFF at HP Waste toner box full detection ON full Main heater triac short circuit detection ON on Scanning lamp on detection LMPDT J106 6 ON on Toner level detection TNEMP J102 B2 ON present Delivery detection EXITPD J124 2 ON present Pre registration paper detection RGPDT J107 A2 ON present Zero cross direction detection Waste toner feedscrew lock detection TRQMLDT J106 10 Main motor M1 lock detection MM_LKDT J106 16 ON motor off COPYRIGHT 1998 CANON INC Table 10 709c CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 91 mm CHAPTER 10 TROUBLESHOOTING F Adjust Mode 3 To select an item use the keypad To execute an item press the Start key To change a setting use the keypad or the Zoom key To enter a value press the Start key To remove an item press the AE key Description Settings Remarks Executes AE auto adjustment Use it to perform AE adjustment See p 10 19 Adjust the lamp intensity for AE mode 450 750 120V model 0 590 230V model A higher setting will increase the intensity of the scanning lamp L
111. EV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A CHAPTER 7 EXTERNALS AUXILIARY MECHANISMS mm G DC Controller PCB 1 Removing the DC Controller PCB 1 Remove the delivery lower cover 2 Disconnect all connectors of the DC controller PCB then free the harness from the harness guide 3 Remove the six mounting screws 1 and remove the DC controller PCB 2 together with the base plate Caution Take extra care not to damage the Figure 7 324 harness whenever you are removing the DC controller PCB The DC controller PCB is equipped with a built in battery BAT101 Keep the following in mind to prevent its both ends from short circuiting and heating 2 Points to Note When Replacing the DC Controller PCB When sending the DC controller to the workshop or the factory put it in a conducting bag intact with its base plate Use a conducting bag whose one side is transparent and be sure that the face of the DC controller PCB shows through the transparent side After replacement make adjustments and settings in service mode and make settings in user mode once again For settings in service mode enter the values recorded in the Service Label stored behind the front door COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 7 19 m CHAPTER 7 EXTERNALS AUXILIARY MECHANISMS H 1 2 3 4 5 1 2 3 Removing the Power Suppl
112. G 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING This chapter provides tables of maintenance inspection standards adjustments and identification of problems image fault malfunction GUIDE TO TROUBLESHOOTING A Sensors and Switches 10 70 TAB S Lio ane 10 1 B Motors Fans Clutches A Image Adjustment Basic Procedure 10 3 and Solenoids 10 72 B Points to Note for Scheduled Servicing 10 4 C Heaters Lamps and Others 10 74 Il STANDARDS AND ADJUSTMENTS 10 5 D POBS eiit 10 76 A Mechanical 10 5 E Variable Resistors Light Emitting B Exposure System 10 7 Diodes and Check Pins by PCB 10 77 C Image Formation System 10 10 VII SERVICE 10 82 D Pick Up Feeding System 10 14 A Outline 10 82 E Fixing System 10 16 B Using Service Mode 10 82 F Electrical 10 18 C Using Adjust Mode and IIl IMAGE FAULTS 10 25 Function 10 83 A Initial 10 25 D Display Mode 1 10 84 B Image Fault Samples 10 28 E I O Display Mode 2
113. GE FORMATION SYSTEM do B Detecting and Controlling the Level of Toner The toner inside the developing assembly is monitored by the toner sensor TS1 The toner sensor uses a piezoelectric oscillator which oscillates in the absence of toner over the sensor at several kHz and sends an oscillation signal TNEMP to the DC controller PCB In the presence of toner over the sensor on the other hand the weight will prevent oscillation AMP m Integration D Output circuit TNEMP Piezoelectric oscillator Figure 4 203 The copier detects the absence of toner in two stages The DC controller PCB monitors the output of the toner sensor at all times as long as the main motor is rotating If the sum of periods of the toner absent signal is 70 sec consecutive two periods it will identify the condition as a condition preceding the absence of toner and will flash the Toner indicator on the control panel Thereafter if the period of the toner absent signal reaches 180 sec or more the DC controller PCB will assume the condition to be the absence of toner and will stop flashing the Toner indicator to keep it on At this time the copy being made is processed as would a normal copy and discharged and then the operation will be stopped Sequence S Toner sensor TS1 icu 12 oner absent Figure 4 204 Toner indication Conditions Copying Flashing T1 T2 o
114. GND ADF1 1 GND ADF2 24V SRT1 TO SORTER 24V ADF1 24 ADF2 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A 5 mmm APPENDIX ES A 6 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON D SPECIAL TOOLS LIST Tool description Tool No Shape Notation APPENDIX mmm Remarks Door switch TKN 0093 Point of use A Mirror positioning tool COPYRIGHT 1998 CANON INC FY9 3009 For adjusting the No 1 No 2 mirror position front rear as a pair CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A 7 mmm APPENDIX SOLVENTS AND OILS Description Use Composition Description Ethyl alcohol Etanol Isopropyl alcohol Isopropanol Cleaning e g glass plastic rubber parts external covers C2H50 CHZ3 2 CHOH Do not bring near open fire Procure locally Isopropyl alcohol may be substituted MEK Cleaning e g metal oil or toner CH3COC2H5 Do not bring near fire Procure locally Heat resisting grease Lubricant oil Lubricating e g fixing drive assemblies Lithium soap mineral oil family Moblybdenum bisulfide Mineral oil paraffin family CK 0427 500 g can CK 0451 100 cc Lubricant oil Mineral oil paraffin family CK 0524 100
115. ICK UP FROM THE CASSETTE A Pick Up Operation The pick up roller and the feed roller are controlled by the pick up solenoid SL1 The stack of copy paper inside the cassette is held up by the lifter and the pick up roller is controlled by the pick up solenoid and is kept away from the surface of the stack When the pick up solenoid turns on the claws move away from the pick up gear and the drive of the main motor M1 is transmitted to the pick up roller and the feed roller A single sheet of copy paper is picked up and sent to the feed roller by the work of the pick up roller and the separation claws If multiple sheets should be picked up the feed roller and the separation roller would serve to make sure that no more than a single sheet is sent forward to the vertical path roller The copy paper is then moved by the vertical path roller to the registration roller In response the registration roller controls the movement of the copy paper so that its leading edge matches the image on the photosensitive drum Power supply Main motor drive PCB Registration roller Feed roller command Pick up Vertical roller path roller Registration paper detection signal RGPDT E L2 DE EE 8 Feed roller clutch drive command FEED CL rere DC Registration roller controller clutch drive Power supply PCB command PCB Pick up solenoid dr
116. IN JAPAN IMPRIME AU JAPON 6 1 ENEMCHAPTERO6 FIXING SYSTEM B Controlling the Fixing Temperature The copier uses two thermistors mounted at the rear ends of the upper roller to monitor surface temperature When copies are made continuously using sheets of B4 or less the temperature of the area center coming into contact with the paper will be lower than the temperature of the areas ends not coming into contact with the paper To prevent such a problem the target temperature is varied in steps to suit the width of copy paper and the temperature detected by the thermistor during copying operation To improve fixing on rough surface paper or tracing paper a special paper mode U13 has been added to user mode thereby enabling a target temperature unique to these types of paper e Paper Width 2257 mm Target temperature immediately Target temperature during Temperature detected by after Start key on continuous copying upper limit thermistor at Start key on General plain paper Paper with rough surface Tracing paper General plain paper Paper with rough surface Tracing paper Less than 170 C 171 C 196 C 161 C 170 C or more less than 180 C 181 C 200 C 171 C 180 C or more less than 190 C 181 C 206 C 171 C 190 C or more 181 C 209 C 171 C Table 6 101 257 mm gt Paper Width gt 216 mm Target temperature immediately Target temperature during after Start key on c
117. ION 3 1 1 etf cete 3 10 A Changing the Reproduction Ratio 3 1 2 Detection of the Original Size Il LENS DRIVE SYSTEM 3 3 by the ADF 3 10 A Driving the Lens 3 3 V DISASSEMBLY ASSEMBLY 3 11 Tz OUUM 3 3 A Scanner Drive Assembly 3 12 2 Motor Control Circuit 3 4 1 Removing the Scanner Motor 3 12 3 Moving the Lens 3 5 2 Removing the Scanner Drive Ill SCANNER DRIVE SYSTEM 3 6 Cable tiere 3 13 A QUINE 3 6 3 Routing the Scanner Drive B Scanner Motor Control Circuit 3 7 Cable eet 3 15 C Relationship between Scanner 4 Adjusting the Position Sensor and Signals 3 7 of the Mirror 3 16 D Basic Sequence of Operations 5 Adjusting the Tension SCANNED E 3 8 of the Scanner Drive Cable 3 17 E Scanner Movement in B Lens Drive Assembly 3 18 Page Separation Mode 3 9 1 Removing the Lens Drive IV OTHERS nitore nec hp 3 10 MOM OR ERES 3 18 A Detecting the Original Size 3 10 2 Removing the Mirror Motor 3 19 CHAPTER 4 IMAGE FORMATION SYSTEM OUTLINE OF THE PROCESSES 4 1 4 Turning On the Blank Exposure QUINE iir e eee nus 4 1 Lamp in Multifeeder Mode
118. IVE command MAIN MOTOR LOCK DETECTION signal MIRROR MOTOR A command MIRROR MOTOR A command MIRROR MOTOR B command MIRROR MOTOR B command MIRROR MOTOR DRIVE command MIRROR HOME POSITION DETECTION signal ACCESSORY COUNTER DRIVE command PRE EXPOSURE LAMP DRIVE command PICK UP SOLENOID DRIVE command POWER SWITCH signal RIGHT DOOR OPEN DETECTION signal REGISTRATION ROLLER CLUTCH DRIVE command REGISTRATION PAPER DETECTION signal SCANNER MOTOR A command SCANNER MOTOR A command SCANNER MOTOR B command SCANNER MOTOR B command SCANNER MOTOR DRIVE command COOLING FAN DRIVE command COOLING FAN DRIVE DETECTION signal SCANNER HOME POSITION DETECTION signal SORTER KIT FAN DRIVE command SORTER KIT FAN DRIVE DETECTION signal TOTAL COUNTER DRIVE command FIXING MAIN THERMISTOR signal FIXING MAIN THERMISTOR DETECTION signal FIXING SUB THERMISTOR signal TONER EMPTY signal WASTE TONER FULL DETECTION signal WASTE TONER FEEDING SCREW LOCKED DETECTION signal ZERO CROSS signal COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 2 Abbreviations AER INTR LSTR SCFW SCRV STBY WMUP WMUPR COPYRIGHT 1998 CANON INC AE ROTATION INITIAL ROTATION LAST ROTATION SCANNER FORWARD SCANNER REVERSE STANDBY WARM UP WARM UP ROTATION CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A 3 mmm APPENDIX ES A 4 COPYRIGHT 1998 CANON INC CANON NP
119. JAPON CHAPTER 10 TROUBLESHOOTING c AE Slope Adjustment If an optimum image cannot be obtained by executing 301 AE auto adjustment in service mode perform the following 1 Place a newspaper on the copyboard glass and select AE and Direct 2 Make a copy and check the copy image 3 Select 303 AE slope adjustment in service mode The copy counter will indicate the present setting 4 Change the setting using the keypad or key 1 A higher setting will increase the intensity making the copy image lighter 2 A lower setting will decrease the intensity making the copy image darker Intensity AE A E t Copy image Original Test Newspaper density Chart Figure 10 227 5 Press the Start key to store the new setting Repeat steps 2 through 5 until an optimum image is obtained 6 Press the Reset key to end service mode COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 21 mm CHAPTER 10 TROUBLESHOOTING 2 3 4 5 7 8 After Replacing the DC Controller PCB Set the DIP switch SW102 on the new DC controller PCB so that its settings are the same as the old DC controller PCB Mount the new DC controller PCB Press the User Mode key hold down 2 and 8 of the numeric keypad for 0 5 sec or more and then press the User Mode key The copier starts service mode and indicates 1
120. MM LKDT 16 m MM DR 17 18 HEAT_ERR 19 POWER SUPPLY ic PCB HEAT_DR ZRCRSS 5V_ON AC_24V_ON 24 jo m STFAN DR STFAN DT AE DATA OPCNT DR TCNT DR BLK CNDR BLK DEN BLK LCK BLK_SCK LNS_COM MT3 EJ 4 12 A 10 14 e 13 RI d N wja jaojo a M o m nN DC CONTROLER PCB 24V REGULATOR GND PCB 5VU 5VR GND J109 J108 Ep CL1 24V RG_CL REGISTRATION ROLLER CLUTCH 24V_ADF1 24V_ADF2 GND_ADF1 GND_ADF2 CSTPDT RDOPDT MLT_CL FEED_CL TNFDT TH1 M TH2 MAIN TROMLDT CASSETTE SIZE SUB THERMISTOR 5VU THERMISTOR DV DC SWITCH PCB DV DC DR HIGH VOLTAGE RE Un CLEANER i DV AC DR TRANSFORMER HVT DR THERMISTOR PCB GND 24V
121. Manual contains basic facts and figures on the NP7161 NP7160 needed to service the machine in the field This copier is designed to enable full automatic copying work and comes with the following systems accessories 1 ADF G1 2 Staper Sorter L1 3 MS C1 4 Cassette Feeding Module C1 NP7161 only This Service Manual covers the copier only and consists of the following chapters Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6 Chapter 7 Chapter 8 Chapter 9 Chapter 10 General Description introduces the copier s features and specifications shows how to operate the copier and explains how copies are made Basic Operation provides outlines of the copier s various mechanical workings Exposure System discusses the principles of operation used for the copier s lens drive unit and scanner drive unit It also explains the timing at which these drive units are operated and shows how they may be disassembled assembled and adjusted Image Formation System discusses the principles of how images are formed It also explains the timing at which the various units involved in image formation are operated and shows how they may be disassembled assembled and adjusted Pick Up Feeding System explains the principles used from when copy paper is picked up to when a copy is delivered in view of the functions of electrical and mechanical units and in relation to their timing of operation It also shows ho
122. N INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 3 7 CHAPTER EXPOSURE SYSTEM EE NNI D Basic Sequence of Operations scanner The scanner is moved forward over a distance determined by the microprocessor based on the selected paper size reproduction ratio and copying mode The microprocessor computes the dimensions of the original in reference to the selected paper size and reproduction ration to determine how much the scanner should be moved forward Power switch Start key ON ON Sequence WMUP SS INTR SCFW sScRV SCFW SCRV LSTR STBYS AER FW RV Scanner motor M2 A E a 5 Scanner home position sensor PS1 m us D as Scanning lamp LA1 3 pM SO S COPYRIGHT 1998 CANON INC Figure 3 303 CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON EE OCHAPTERS3 EXPOSURE SYSTEM E Scanner Movement in Page Separation Mode Start key Leading edge of Leading edge of Leading edge of ON 1st page original 1st page original 2nd page original V V V V Sequence INTR SCFW1 SCRV2 SCFW2 SCRV2 LSTR 5 AER ge ver kp pss FW RV Scanner motor M2 E HEN ee 5 Scanner home position 18mm 18mm sensor PS1 a Scanning lamp LA1 ee Figu
123. NP 7 US UU ANI ZIGO SERVICE MANUAL REVISION 0 AUG 1998 FY8 13FB 000 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON IMPORTANT THIS DOCUMENTATION IS PUBLISHED BY CANON INC JAPAN TO SERVE AS A SOURCE OF REFERENCE FOR WORK IN THE FIELD SPECIFICATIONS AND OTHER INFORMATION CONTAINED HEREIN MAY VARY SLIGHTLY FROM ACTUAL MACHINE VALUES OR THOSE FOUND IN ADVERTISING AND OTHER PRINTED MATTER ANY QUESTIONS REGARDING INFORMATION CONTAINED HEREIN SHOULD BE DIRECTED TO THE COPIER SERVICE DEPARTMENT OF THE SALES COMPANY THIS DOCUMENTATION IS INTENDED FOR ALL SALES AREAS AND MAY CONTAIN INFORMATION NOT APPLICABLE TO CERTAIN AREAS COPYRIGHT 1998 CANON INC Printed in Japan Imprim au Japon Use of this manual should be strictly supervised to avoid disclosure of confidential information Prepared by OFFICE IMAGING PRODUCTS TECHNICAL SUPPORT DEPT 1 OFFICE IMAGING PRODUCTS TECHNICAL SUPPORT DIV CANON INC 5 1 Hakusan 7 chome Toride shi lbaraki 302 8501 Japan COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON Canon SERVICE INFORMATION Issued by Office Imaging Products Quality Assurance Center Canon Inc All models No F 04 E98007 F 04 J98005 TREIE DATE MAY 1998 LOCATION SUBJECT MODEL Service Manual in New Format This Service Manual is compiled in a new format which differs from
124. ON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 103 mm CHAPTER 10 TROUBLESHOOTING qu C Sorter Cause Description Exchange of data with the copier is faulty Communication is monitored at all times This error occurs when the communication with the copier stops The feed motor does not rotate See the Sorter Service Manual The feed motor rotates too slowly See the Sorter Service Manual The tandem path motor does not rotate See the Sorter Service Manual The stack motor does not rotate See the Sorter Service Manual The alignment motor does not rotate See the Sorter Service Manual The stapler drive motor does not rotate See the Stapler Service Manual The shift motor does not rotate See the Sorter Service Manual The shift motor rotates too slowly See the Sorter Service Manual A timing jam has occurred D Cassette Feeding Module Cause See the Sorter Service Manual Description The waste toner box swing cam home position sensor is faulty The cassette relay PCB is faulty The waste toner box swing cam does not return to home position within a specific period of time when the waste toner box swing cam is being driven 10 104 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON APPENDIX A GENERAL TIMING CHART
125. Outline i eis 10 82 J Application Mode 7 10 98 B Using Service Mode 10 82 VIII SELF DIAGNOSIS 10 99 1 Starting Service Mode 10 82 10 99 2 Selecting Service Mode 10 82 Be ADF adicit cedet e pua d cud t 10 103 C Using Adjust Mode and C SONO na edo dre 10 104 Function 10 83 D Cassette Feeding Module 10 104 ue B aaa SSS A GENERAL TIMING CHART A 1 D SPECIAL TOOLS LIST A 7 B SIGNALS AND ABBREVIATIONS A 2 E SOLVENTS AND OILS A 8 C GENERAL CIRCUIT DIAGRAM A 5 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON xi CHAPTER 1 GENERAL DESCRIPTION This chapter introduces the copier s features and specifications shows how to operate the copier and explains how copies are made le FEATURES ta 1 1 A Control 1 10 Il SPECIFICATIONS 1 2 B User Mode 1 12 As COPIST 1 2 V ROUTINE MAINTENANCE 1 NAMES OF 1 8 BY THE USER 1 14 A External View 1 8 VI PONITS TO NO
126. PCB 7 21 1 Removing the Control Panel 7 13 1 Removing the Lamp C Copyboard Glass 7 14 Regulator PCB 7 21 viii COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 8 INSTALLATION 1 SELECTING THE SITE 8 1 Il UNPACKING AND INSTALLATION 8 2 A Unpacking suscite 8 2 B Removing the Metal Fixings 8 3 C Mounting the Drum Unit 8 4 D Cleaning the Parts and Making Checks 8 6 E Checking the Images Operations and User Mode tecnicos 8 8 F Supplying 8 10 IIl RELOCATING THE MACHINE 8 12 IV INSTALLING THE CONTROL CARD IV Nissen 8 13 V INSTALLING THE REMOTE DIAGNOSTIC DEVICE ll 8 14 VI INSTALLING THE ACCESSORY COUNTER iet ne 8 23 VII INSTALLING THE ACCESSORY HEATER uiii cie Ne 8 25 A Installing the Heater Switch 8 25 B Mounting the Cassette Drum Heater 8 26 C Installing the Mirror Heater 8 27 CHAPTER 9 MAINTENANCE AND SERVICING PERIODICALLY REPLACED PARTS 9 1 COPIST ctos 9 1 Il CONSUMABLES AND DURABLES 9 2 9 2 IIl SCHEDULED SERVICING CHART 9 3 IV SCHEDULED SERVICING TABLE 9 5 CHAPTER 10 TROUBLESHOOTING
127. R 10 TROUBLESHOOTING C Using Adjust Mode and Function Mode In adjust mode and function mode the copier stores the settings made on the control panel in the RAM on the DC controller PCB and use them to simulate the functions of conventional variable resistors and switches Figure 10 701 shows the information sheet stored behind the copier s front door Each copier is adjusted at the factory and the adjustment values are recorded in the sheet If you have replaced the DC controller PCB or initialized the RAM you will have to enter the values recorded in the information sheet into the RAM on the DC controller PCB Moreover if you have entered any values newly in the field be sure to record the value in this sheet AE ADJ LMP ADJ AE SLOP REGIST LE BLANK PG RGST PG BLANK TE BLANK MF ARCH CST1 ARCH CST2 ARCH LIGHT 5 LNS HP MIRR HP LNS TBL MIRR TBL MLT CL TMG MODEL SW DOC ST L Figure 10 701 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 83 mm CHAPTER 10 TROUBLESHOOTING D Display Mode 1 To select an item use the keypad To execute an item use the Start key To cancel an item use the Clear key Description Remarks Indicates the type of jam Indicates the type of jam See Table 10 702 E805 Indicates the code of the fan that caused E805 0
128. RIAL DATA CLOCK signal BLANK EXPOSURE LAMP SERIAL DATA signal CLEANER THERMISTOR signal COPY DENSITY VOLUME signal CASSETTE PAPER DETECTION signal CASSETTE SIZE DETECTION 0 signal CASSETTE SIZE DETECTION 1 signal CASSETTE SIZE DETECTION 2 signal CASSETTE SIZE DETECTION 3 signal DEVELOPING AC BIAS CONTROL command DEVELOPING AC BIAS DRIVE command DEVELOPING DC BIAS CONTROL command DEVELOPING DC BIAS DRIVE command EXHAUST FAN 0 DRIVE command EXHAUST FAN 0 DRIVE DETECTION signal EXHAUST FAN 1 DRIVE command EXHAUST FAN 1 DRIVE DETECTION signal DELIVERY PAPER DETECTION signal FEED ROLLER CLUTCH DRIVE command FIXING HEATER DRIVE command FIXING HEATER ERROR DETECTION signal HVT DRIVE command SCANNING LAMP PULSE WIDTH MODIFICATION signal SCANNING LAMP DRIVE command SCANNING LAMP DRIVE DETECTION signal LENS MOTOR A command LENS MOTOR A command LENS MOTOR B command LENS MOTOR B command LENS MOTOR DRIVE command LENS HOME POSITION DETECTION signal MULTIFEED ROLLER CLUTCH DRIVE command MULTIFEED SOLENOID DRIVE command MULTIFEEDER PAPER DETECTION signal MLTPD1 MLTPD2 MM_DR MM_LKDT MMR_A MMR_A MMR_B MMR B MMR COM MRRHP OPCNT DR PREXP DR PU SL PW SW RDOPDT RG CL RGPDT SC A SC A SC B SC B SC COM SCFAN DR SCFAN DT SCHP STFAN DR STFAN DT TCNT DR TH1 TH1 DT TH2 TNEMP TNFDT TRQMLDT ZRCRSS MULTIFEEDER PAPER WIDTH DETECTION signal 1 MULTIFEEDER PAPER WIDTH DETECTION signal 2 MAIN MOTOR DR
129. RINTED IN JAPAN IMPRIME AU JAPON 2 3 CHAPTER 2 BASIC OPERATION C Basic Sequence of Operations 1 Basic Sequence of Operations at Power On Power switch ON 120 C 160 C Sequence WMUP WMUPR STBY S Wait indicator flashing Fixing heater H1 Main motor M1 Green Primary charging assembly Transfer charging assembly Static eliminator Developing AC bias Developing DC bias Pre exposure lamp LA2 Blank exposure lamp LA3 Scanning lamp LA1 Scanner motor M2 up OU CUP ce Ay ND OU our AX Scanner home position sensor PS1 Lens motor M3 Lens home position sensor PS2 Mirror motor M4 Mirror home position sensor PS3 2 4 COPYRIGHT 1998 CANON INC Figure 2 103 CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON EE CHAPTER2 BASIC OPERATION Period Description Remarks WMUP warm up From when the power switch is turned on until the surface temperature of the upper fixing roller reaches 120 C Waits until the upper fixing roller warms up Moves the lens mirror and scanner to home position WMUPR warm up rotation From when WMUP ends until the surface temper ature of the upper fixing roller reaches
130. TE BY THE USER 1 15 B Cross Section 1 9 VII IMAGE FORMATION 1 16 IV OPERATING THE MACHINE 1 10 A Outline eeeeeeee 1 16 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 1 GENERAL DESCRIPTION FEATURES 1 The copier is designed light in weight about 42 kg and compact in size 566 mm wide 541mm deep 2 The copier turns out as many as 16 copies each minute 3 The addition of the Cassette Feeding Module C1 accessory enables a source of paper capable of holding a maximum of 1 050 sheets The density may be adjusted to 33 different shades or in automatic mode AE The use of a photo mode promises faithful reproduction of halftone ph aee 6 The use of an auto power off function promises power saving operation COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 1 1 EE CHAPTER 1 GENERAL DESCRIPTION a ll SPECIFICATIONS A Copier 1 Type Body Desktop Copyboard Fixed Light source Halogen lamp 120V 200W 230V 220W Lens Lens array Photosensitive material OPC 30 dia 2 Mechanisms Copying Indirect electrostatic Charging Corona Exposure Slit moving light source Copy density adjustment Auto or manual Development Dry to
131. TER 10 TROUBLESHOOTING 14 The copy has faulty fixing Cause Checks Actions Fixing roller upper Is the problem noted vertically Check the fixing roller upper lower lower for scratches Fixing heater H1 Does the fixing heater H1 turn on See the Fixing heater fails to turn immediately after power on on Fixing lower heater Is the nip of the fixing assembly as Adjust the fixing lower roller pressure indicated pressure Copy paper Try recommended paper If the results are good advise the user to use recommended paper COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 37 EH CHAPTER 10 TROUBLESHOOTING 15 16 The copy has a displaced leading edge 17 Cause Step Checks Yes No Actions Original page 1 Is the original page placed correctly NO Place the original page correctly Copy paper 2 Is the paper of a type recommended NO Try recommended paper If the results by Canon are good advise the user to use recommended paper 3 Make copies using the cassette and the YES Ifthe results are the same go to step 4 multifeeder tray Is the displacement on the leading edge the same regardless of NO Check each pick up system the source of paper Pick up roller 4 Has the pick up roller reached its YES If wear is noted on the pick up roller life replace it Leading edge 5 Adjust the leading ed
132. UG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 3 Detach the spring 3 and detach the lower separation claw 4 Removing the Delivery Roller a the two mounting screws 2 then remove the delivery roller assembly 3 2 gear 5 3 roller 8 COPYRIGHT 1998 CANON INC Remove the two tension springs 1 and Remove the grip ring 4 and remove the Remove the two E rings 6 and the two bushings 7 then detach the delivery CHAPTER 6 FIXING SYSTEM mm Figure 6 231 EE 2 1 3 Figure 6 232 Figure 6 233 CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 1 2 6 17 CHAPTER 7 EXTERNALS AUXILIARY MECHANISMS This chapter shows the copier s external parts and explains the principles used for the copier s various control mechanisms in view of the functions of electrical and mechanical units and in relation to their timing of operation It also shows how these units may be disassembled assembled and adjusted COPYRIGHT 1998 CANON INC PANS eques 7 1 POWER SUPPLY it ecce 7 4 A Outline of Power Supply 7 4 B Power Supply Circuitry 7 5 C Protection Mechanisms of the Power Supply Circuitry 7 7 DISASSEMBLY ASSEMBLY 7 8 A External 7 9 B Control
133. a Scanner home position sensor PS1 Lens motor M3 Ti Lens home position sensor PS2 Mirror motor M4 LA Mirror home position sensor PS3 2 6 COPYRIGHT 1998 CANON INC Figure 2 104 CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 2 BASIC OPERATION Period Description Remarks INTR initial rotation From when the Start key is pressed until the scanner starts to move forward Stabilizes the drum sensitivity in preparation for copying operation AER AE rotation From when the Start key is pressed until the scanner finishes measuring densuty Measures the density of the original while the scanner is moving forward Used only in AE mode SCFW scanner forward While the scanner is moving forward Uses the scanning lamp to shine the original and directs the reflected optical image to the photosensitive drum by way of mirrors and lenses Generates the registration signal and moves the copy paper to the transfer assembly SCRV scanner reverse While the scanner is moving in reverse Returns the scanner to home position in preparation for the next copying operation LSTR last rotation COPYRIGHT 1998 CANON INC From when SCRV ends until the main motor stops Rids the surface of the photos
134. ack Density Adjustment Is the density of gray scale No 1 00 low light YES 1 2 Turn the adjusting screw at the front rear of the primary charging assembly counterc lockwise so that the primary charging wire is closer to NO the photosensitive drum Make a copy CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A Optimum Exposure Adjustment Is the density of gray scale No 10 optimum YES Is the density of gray scale No 10 too high dark NO Increase the setting of scanning lamp ON voltage adjustment in service mode 326 Make a copy Image Adjustment Basic Procedure Non AE Copy Density at 5 Is the white background foggy NO YES See Preventing Image Faults p 10 32 Perform AE adjustment p 10 19 Decrease the setting of scanning lamp ON voltage adjustment in service mode 326 10 3 B Points to Note for Scheduled Servicing Part Tool solvent Remarks Part Tool solvent Remarks Copyboard glass Alcohol Cleaning Static eliminator Brush attachment Cleaning Lens Blower brush Cleaning Dust proofing glass Blower brush or Cleaning with a blower Scanner rail Lubricant Lubricate No 4 to 6 mirrors alcohol and lint free brush if excessive Reflecting plate Blower brush Cleaning paper cleaning with alcohol No 1 to 3 mirrors Blower brush or Cleaning with a blower Charging wire Alcohol
135. andby open the right door When the light blocking plate is at PS11 When the light blocking plate is not at PS11 Waste toner sensor 10 24 J106 9 222 In standby remove the waste toner box COPYRIGHT 1998 CANON INC When the light blocking plate is at sensor When the light blocking plate is not at sensor CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A CHAPTER 10 TROUBLESHOOTING IMAGE FAULTS Initial Checks Checking the Site Environment The power outlet must be exclusive and must provide the rated voltage The power plug must remain connected throughout day and night The copier must not be installed in a high temperature humidity environment near a water faucet water boiler humidifier near a source of fire or in a dusty area The copier must not be subjected to ammonium gas The copier must be kept away from direct sunshine As necessary provide curtains The site must be well ventilated The copier must be kept level The copier must remain powered throughout day and night bd to make sure that all above conditions are met Checking the Originals Identify the problem as to its cause original page or the copier As a rule the Copy Density adjusting lever must be at the median graduations and U12 density correction in user mode must be set to 0 Original pages with a reddish background can cause p
136. anel check Does the Add Paper indicator turn on Check the wiring from the DC controller PCB to the control panel PCB if normal replace the control panel PCB Replace the DC controller PCB CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING 37 The Add Paper indicator fails to turn off Cause Checks Actions Cassette Is the cassette set correctly Set the cassette correctly Sensor PS4 PS7 Are the following sensors normal See the Check the wiring from the instructions on how to check the sensor lever and each sensor to photointerrupers the DC controller PCB if normal replace the sensor PS4 Cassette paper sensor DC controller PCB PS7 Multi paper sensor Replace the DC controller 38 The Jam indicator fails to flash Cause Checks Actions Sensor PSS5 PS6 Are the following sensors normal See the Check the wiring from the instruction on how to check the sensor lever and each sensor to photointerrupters the DC controller PCB if normal replace the sensor PS5 Registration paper sensor PS6 Delivery paper sensor Control panel PCB Execute service mode 409 control panel Check the wiring from the DC check Does the Jam indicator turn on controller PCB to the control panel PCB if normal replace the control panel PCB DC controller PCB Replace the DC c
137. anner is moving forward Check the wiring from the blank exposure lamp to the DC controller PCB if normal replace the DC controller PCB Check to make sure that the photosensitive drum is free of external light Transfer charging assembly Clean the transfer charging wire and the shield plate Is the problem corrected End Separation static eliminator 10 34 COPYRIGHT 1998 CANON INC Clean the separation static eliminator Is the problem corrected CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING 12 The copy has white spots vertical Developing assembly Photosensitive drum Copy paper Checks Is the problem noted at intervals of about 3 2 cm scratch on the developing cylinder Is the problem noted at intervals of about 9 4 cm scratch on the photosensitive drum Try copy paper fresh out of package Is the problem corrected Actions 1 Clean the developing roller 2 Clean the surface of the developing cylinder 3 If scratches are found on the surface of the developing cylinder replace the developing cylinder or the developing assembly 1 Clean the photosensitive drum 2 If the scratches are found on the photosensitive drum replace the drum unit The copy paper is moist Instruct the user on the correct method of storing copy paper Scanner rail Scanner cable Charging
138. aper with rough surface Tracing paper General plain paper Paper with rough surface Tracing paper Less than 170 C 175 C 196 C 165 C 170 C or more less than 180 C 186 C 204 C 176 C 180 C or more less than 190 C 194 C 208 C 184 C 190 C or more 200 C 215 C 190 C Table 6 104 e From Power On to End of Copying Power switch Start key ON ON Sequence WMUP WMUPR STBY INTR COPY LSTR STBYS Wait indicator flashing Green Orange Main motor M1 Fixing heater H1 Target temperature control S 1 220 C S 4 4 4 200 C 1 lt 4 1800C 4 rs IQ e l C Paper with rough surface mode 160 C General plain paper mode 140 C LN Tracing paper mode PER MEN 120 C 5 a COPYRIGHT 1998 INC 1 Varies according to paper width Figure 6 102 CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 6 3 ENEMCHAPTERO6 FIXING SYSTEM Emm Power Save Key ON or Auto Power OFF Start key Energy saver Auto power ON key ON OFF V V V Sequence STBY INTR COPY LSTR STBY S 2 Energy saver indicator S Main motor M1 Fixing heater H1 Target temperature control 220 C 4 E E oe 200 44 00 C 180 C bw 160 C 140 C 120 C 1 Varies acco
139. ass Is the problem corrected Pre exposure lamp LA2 Clean the pre exposure lamp Is the problem corrected Developing assembly Fixing assembly Is the developing cylinder coated with a uniform layer of toner 9 The copy has black lines vertical thin Checks Check and clean the edge of the blade of the developing assembly Check the fixing assembly Actions Press the Copy Start key and turn off the power switch while the copy paper is in the feeding assembly At this time does the copy image before it goes through the fixing assembly have black lines Go to step 4 Transfer guide Photosensitive drum Developing system Exposure system Is the transfer guide soiled particularly the transfer upper guide Are there scratches or black lines in the peripheral direction of the surface of the photosensitive drum Clean the transfer guide Replace the drum unit If scratches are found be sure to find out the cause Check the developing system and the exposure system Fixing assembly COPYRIGHT 1998 CANON INC Are there scratches or black lines in the peripheral direction of the surface of the fixing upper roller 1 Replace the upper roller 2 Check the separation claw Check to make sure that the fixing assembly inlet is not soiled CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 33 EH
140. ate moves to the front When the adjusting screw 1 is turned counterclockwise the cassette locking lever plate 2 moves to the rear 3 Figure 5 629 Figure 5 630 5 26 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 6 FIXING SYSTEM This chapter explains the principles used to fuse toner images to transfer medium in view of the func tions of electrical and mechanical units and in relation to their timing of operation It also shows how these units may be disassembled assembled and adjusted l OUTLINE OF OPERATION 6 1 Il DISASSEMBLY ASSEMBLY 6 7 As Outline iocis ite 6 1 A Fixing Assembly 6 8 B Controlling the Fixing Temperature 6 2 B Delivery Assembly 6 16 C Error Detection Circuit 6 5 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 6 FIXING SYSTEM mm I OUTLINE OF OPERATION A Outline The upper roller and the lower roller of the fixing assembly and the delivery roller of the delivery assembly are operated by the drive from the main motor M1 coming through gears The upper roller has a built in heater which is kept on during WMUP after power on a
141. ation a Turning On Off the Scanning Lamp When the scanning lamp drive signal LMPDR is 0 the output of the control circuit goes 0 keeping the drive circuit from turning on and therefore not supplying the scanning lamp LA1 with AC power When LMPDR is 1 the output of the control circuit will be 1 turning on the drive circuit and thereby supplying the scanning lamp LA1 with AC power b Controlling the Intensity of the Scanning Lamp The intensity of the scanning lamp is increased decreased by controlling the voltage of the power supplied to the scanning lamp according to the level of the pulse width modulation signal LMP PWM from the DC controller PCB LMP PWM varies the pulse duty between 10 and 90 to suit the selected reproduction ratio so as to control the voltage of the power supplied to the scanning lamp as shown in Table 4 101 actual value Pulse duty 96 t T x 100 Figure 4 104 Power supply Pulse duty DC output 120V 10 to 90 45 to 80V 230V 10 to 90 98 to 175V Table 4 101 c Detecting the Activation of the Scanning Lamp The control circuit on the lamp regulator PCB generates the drive detection signal LMPDT at all times while the scanning lamp remains on and sends the signal to the lamp activation detection IC IC113 on the DC controller PCB If the scanning lamp remains on for 21 sec or more the error detection circuit will cause the AC 24V ON signal to
142. btained 8 Press the Reset key to end service mode 10 18 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING 2 AE Adjustment If copies of a newspaper are foggy or if you have replaced the scanning lamp LA1 AE sensor or DC controller PCB perform the following Be sure that the image is an optimum image before starting the work a AE Auto Adjustment 1 AE Scanning Intensity Auto Adjustment 1 Select 301 AE auto adjustment in service mode 2 Place the Test Chart white background original on the copyboard glass 3 Press 0 of the keypad so that the copy count indicator indicates 0 4 Press the Start key The scanner moves to the AE scan position stops and performs AE exposure Then the scanner moves in reverse to home position 15 sec from start of forward movement and the end of reverse movement The output of the AE sensor will be indicated in the copy count indicator Check to make sure it is 80 5 If not execute 302 AE scanning intensity adjustment in service mode 2 AESlope Auto Adjustment 5 Select 301 AE auto adjustment in service mode 6 Place a newspaper on the copyboard glass 7 Press 1 of the keyboard so that the copy count indicator indicates 1 8 Press the Start key The scanner moves to the AE scan position stops and performs AE exposure Then the scanner
143. ccessory counter as a large size copy counter Not used Table 8 601 8 24 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 8 INSTALLATION VII INSTALLING THE ACCESSORY HEATER A Installing the Heater Switch 1 Remove the rear cover and cut off the face plate 1 Figure 8 701 2 Mount the heater switch 2 with two screws 3 4 3 Lead the heater switch harness through the clamp and connect it to the connector 4 BY f 2 4 mo a o ool Figure 8 703 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 8 25 CHAPTERS INSTALLATION memm B Mounting the Cassette Drum Heater 1 Remove the front door drum unit developing assembly transfer charging assembly and cassette 2 Engage the two hooks 1 of the cassette drum heater on the cut off and slide to the rear to mount Figure 8 704 3 Secure with two mounting screws 2 N 2 4 Lead the cassette drum heater harness 3 through the harness guide and connect the connector 4 Figu
144. ch Check the wiring on the DC controller PCB to the thermistor if normal replace the thermistor Sub thermistor TH2 Turn off the power switch and let the fixing roller cool sufficiently Turn on the power switch and select service mode 110 fixing sub thermistor detection temperature display Does the reading remain unchanged at 110 After the check be sure to tun off the power switch Check the wiring from J109 on the DC controller PCB to the thermistor if normal replace the thermistor Thermistor TH1 TH2 Is the thermistor in even contact with the upper fixing assembly Mount the thermistor correctly Thermistor TH1 TH2 Clean the area of contact of the thermistor Is the problem corrected End Operating environment DC controller PCB 10 42 COPYRIGHT 1998 CANON INC Is the operating environment as specified nform the user that the operating environment does not meet the requirements nstruct the user not to turn on the copier before the room is warm enough Replace the DC controller CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING 2 E001 Checks Actions Execute service mode 412 error clear to Go to step 3 clear E001 Open the front door and the top unit and let the fixing roller cool sufficiently Turn on the power switch Is E001 indicat
145. change the reproduction ratio in the axial direction of the photosensitive drum The optical length is varied as shown in Figure 3 102 by changing the location of the No 4 No 5 mirror unit The scanner drive system moves the No 1 mirror relatively faster in Reduce or slower in Enlarge than the photosensitive drum peripheral speed to change the reproduction ratio in the peripheral direction of the photosensitive drum r Note 1 In Direct the speed of the No 1 mirror is made identical to the peripheral speed of the photosensitive drum 2 In both Reduce and Enlarge the optical length is longer than in Direct Direct F F Optical length 5 gt Reduce F F Optical length T gt Enlarge F F Optical length Y Figure 3 101 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 3 1 CHAPTER 3 EXPOSURE SYSTEM Copyboard glass Enlarge Reduse Enlarge reduce ENS Kris i Lens EE fe lp Photosensitive drum Figure 3 102 3 2 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 3 EXPOSURE SYSTEM mm Il LENS DRIVE SYSTEM A Driving the Lens 1 Outline The lens is driven by the lens motor M3 and the mirror motor M4 As shown in Figure 3 201 when the lens motor rotates in normal direction the lens moves in the d
146. chapter introduces requirements for the site of installation and shows how the copier may be installed using step by step instructions COPYRIGHT 1998 CANON INC SELECTING THE 8 1 UNPACKING AND INSTALLATION 8 2 Unpacking uen etd 8 2 B Removing the Metal Fixings 8 3 C Mounting the Drum Unit 8 4 D Cleaning the Parts and Making Checks 8 6 E Checking the Images Operations and User Mode 8 8 F Supplying 8 10 RELOCATING THE MACHINE 8 12 IV INSTALLING THE CONTROL CARD IV Nassim 8 13 INSTALLING THE REMOTE DIAGNOSTIC DEVICE 8 14 VI INSTALLING THE ACCESSORY COUNTER trt messe 8 23 VII INSTALLING THE ACCESSORY HEA TER i Itiner eere reete 8 25 Installing the Heater Switch 8 25 B Mounting the Cassette Drum Heater 8 26 Installing the Mirror Heater 8 27 CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON ES CHAPTERS INSTALLATION l SELECTING THE SITE Check the site of installation against the following requirements If possible visit the site in advance of the delivery of the machine 1 There must be a dedicated power outlet for exclusive use by the copier capable of providing the rated voltage 10 2 The temperature must be 7 5 t
147. ck Up Drive Assembly cis 5 17 4 Removing the Pick Up Assembly sees 5 17 5 Removing the Feed Roller 5 18 6 Removing the Separation Roller 5 18 7 Mounting the Separation Roller 5 19 B Multifeeder Assembly 5 20 1 Removing the Multifeeder Tray 5 20 2 Removing the Multifeeder Assembly 5 20 3 Removing the Multifeeder Pick Up Roller 5 21 4 Removing the Separation Pad 5 21 5 Adjusting the Pressure of the Separation Pad 5 22 C Registration Roller Assembly 5 23 1 Removing the Registration Roller Assembly 5 23 D Cassette Assembly 5 24 1 Removing the Cassette Size SWITCH nie ee esent 5 24 2 Changing the Cassette Size AB INCH eene 5 25 3 Adjusting the Left Right Registration 5 26 CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON vii CHAPTER 6 FIXING SYSTEM l OUTLINE OF OPERATION 6 1 6 Removing the Main Thermistor 6 12 A Outline o on 6 1 7 Removing the Sub Thermistor 6 12 B Controlling the Fixing Temperature 6 2 8 Removing the Fixing Upper C Error Detection 6 5 Holler e es 6 13 1 Outline 6 5 9 Removing the Fixing Lowe
148. cover Turn the toner supply lever counterclockwise to unlock the developing assembly Toner supply lever Remove the stopper 1 screw and Check to make sure that the developing cylinder take out the developing assembly is free of soiling and scratches Stopper Screw Caution Do not touch the developing cylinder Take care not to damage the developing cylinder Developing TB assembly Set the developing assembly in the A copier by sliding it along the rails ITR T Im then mount the stopper Turn the toner supply lever clockwise to lock the developing assembly in place Close the front door COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 8 7 mm CHAPTER 8 INSTALLATION E Checking the Images Operations and User Mode Work Checks remarks Connect the power cord to the copier and connect the power plug to the outlet Turn on the power switch Check to make sure that the Paper indicator flashes Press the keys on the numeric keypad and the Clear key to make sure that copy counts are indicated correctly Supply toner See F Supplying Toner In standby state execute service mode 401 stir toner Steps 1 Press the User mode key 2 Hold down 2 and 8 on the numeric keypad at the same time for 0 5 sec or more
149. d J102 A12 on the DC controller PCB Does the voltage change from about 0 to about 24 and then to about 0 V when the Start key is pressed Checks Check the wiring from the DC controller PCB to the counter if normal replace the counter Replace the counter Replace the DC controller PCB Actions Scanner home position sensor PS1 DC controller PCB COPYRIGHT 1998 CANON INC Does the scanner move forward or in reverse until E202 is detected Is the scanner home position sensor normal See the instructions on how to check the photointerrupters See The scanner fails to move Check the wiring from the DC controller PCB to the sensor if normal replace the sensor Replace the DC controller PCB CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 47 mm CHAPTER 10 TROUBLESHOOTING 10 E208 Checks Actions Does the mirror move when the power switch is turned on See The mirror fails to move Mirror home position sensor PS3 DC controller PCB 11 E210 Is the mirror home position sensor normal See the instructions on how to check the photointerrupters Checks Check the wiring from the DC controller PCB to the sensor if normal replace the sensor Replace the DC controller PCB Actions Turn on the power switch Does the lens move See The lens fails to move
150. e recommended paper DC controller PCB Pick up clutch Does the pick up roller of the selected cassette holder rotating during copying operation See The pick up operation fails Pick up roller Is the pick up roller deformed or worn Replace the pick up roller Separation roller Is the separation roller deformed or worn Replace the separation roller Feeding roller Is the feeding roller deformed or worn Replace the feeding roller Registration roller drive assembly Does the registration roller operate normally See The registration roller fails to rotate Registration roller vertical path roller Is the registration roller or the vertical path roller deformed or worn Replace the roller Transfer charging assembly Is the transfer charging assembly set correctly Check the transfer charging assembly Is there foreign matter on the paper guide of the transfer charging assembly Remove the foreign matter Copy paper Pick up roller COPYRIGHT 1998 CANON INC Make a copy in manual mode Does the main motor rotate Try paper recommended by Canon Is the problem corrected See The pick up operation fails Advise the user to use recommended paper Check the pick up roller for deformation and wear CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 67 mm CHAPTER 10 TROUBLESHOOTING ES
151. e DC controller PCB as long as the main motor is rotating at a constant speed If the rotation of the main motor becomes irregular for some reason MM goes l If MM LKDT 1 continues for 1 sec or more when MM DR is 1 the DC controller PCB will identify the condition as a main motor error and will immediately stop the main motor and indicate E010 on the control panel 2 8 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON ES CHAPTER 2 BASIC OPERATION E Inputs to the DC Controller 1 Inputs to the DC Controller 1 3 DC controller PCB 12 J103 ga At5Y Scanner home s 2 214 When the scanner is at home position 1 position sensor P 3 B1 When the light blocking plate is at PS1 T T 1 3 gel At5Y Lens home 2 B5 When the lens is at home position 1 M LNSH position sensor PS2 3 B4 When the light blocking plate is at PS2 T T 2 B 5V Mirror home 2 B8 MRR When the mirror is at home position 1 position sensor PS3 3 B7 When the light blocking plate is at PS3 UT J19 J40 J107 E 39 6 Bt0 9V Cassette paper 1 5 4 B12I gTppT When PS4 has detected paper 1 sensor PS4 2 4 5 11 When the light blocking plate is at PS4 JA J17 J700 4 3 1 aa 9V Registration PS 2 2 2 A2iInGppT When PS5 has detected paper 1 paper s
152. e Start key 3 The copier will automatically turn off clearing the error 2 E202 may be checked using 108 in service mode error history indication 10 102 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING B ADF Cause Description Exchange of data with the copier has a fault The communication is monitored at all times This error occurs when the communication with the copier stops The separation motor does not rotate The crescent sensor is faulty See the ADF Service Manual The belt motor does not rotate The belt clock is faulty See the ADF Service Manual The feed motor does not rotate The feed motor clock is faulty See the ADF Service Manual The delivery motor does not rotate The delivery clock is faulty The sensor level is faulty See the ADF Service Manual See the ADF Service Manual The auto start separation motor does not rotate The auto start crescent sensor is faulty The auto start separation clock is faulty See the ADF Service Manual r Note copier When the self diagnosis function has turned on the ADF may be reset by turning off the To continue making copies while the ADF is out of order disconnect the lattice connector on the ADF side open the ADF and place an original on the copyboard glass COPYRIGHT 1998 CAN
153. e activation of the multifeeder pick up roller clutch CL3 A higher setting will delay deactivation of the clutch thereby increasing arching unit 0 21 mm 10 92 Adjusts the arching in cassette 1 pick up mode de activation of pick up roller clutch CL2 Adjusts the arching in cassette 2 pick up mode de activation of the pick up roller clutch COPYRIGHT 1998 CANON INC A higher setting will increase the arching unit 0 42 mm A higher setting will delay de activation of the clutch thereby increasing the arching unit 0 42 mm CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON Description Settings CHAPTER 10 TROUBLESHOOTING mm Remarks Adjusts the activation voltage of the scanning lamp Adjusts the position of the lens Direct at 100 450 660 120V model 0 390 230V model A higher setting will increase the intensity of the scanning lamp LA1 making the copies lighter A higher setting will enlarge the image unit 0 1 mm Adjusts mirror home position at 100 ratio Selects a table for lens travel to suit reproduction ratio A higher setting will enlarge the image unit 0 1 mm If you replaced the DC controller PCB or initialized the RAM be sure to enter the value recorded on the Service Label stored behind the front door Selects a table for No 4 No 5 mirror travel to suit reproduction ratio Adjusts th
154. e detected voltage e g 2 78 V will be indicated as 278 Indicates the voltage of the density adjusting volume VR1 Indicates the detected voltage e g 2 78 V will be indicated as 278 Indicates CPU port 6 Indicates the state of input See p 10 89 Indicates CPU port 8 Indicates the state of input See p 10 89 Not used Indicates Indicates the state of input See p 10 89 Indicates PIO3B Indicates the state of input See p 10 89 Not used 10 88 Not used COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING mm Guide to Nos 202 203 204 205 219 220 222 and 223 2a 1 2b if 1b I qnem MON JUNE HD 2c Bile 1c 2d 1d Description Connector Remarks Detects the presence absence of the TCNT J102 A10 ON present total copy counter Detects the presence absence of CSTPDT J107 B12 ON present paper in cassette 1 Detects the presence absence of a CCDT J104 A10 ON absent control card Detects the state open closed of RDOPDT J107 B7 closed the right door Detects paper in the multifeeder MLTPDTO J107 A8 ON present Detects the width of paper in the MLTPDT1 J107 A11 multifeeder 1 Detects the width of paper in the MLTPDT2 J107 A14 multifeed
155. e timing of activation of the multifeeder pick up clutch CL3 Use this mode if double feeding or pick up failure cannot be corrected by adjusting the pressure of the separation pad If you replaced the DC controller PCB or initialized the RAM be sure to enter the value recorded on the Service Label stored behind the front door A higher setting will delay activation of the clutch unit 0 02 sec If pick up failure occurs decrease the setting f double feeding occurs increase the setting Adjusts activation of the multifeeder pick up clutch CL3 Use this mode if pick up failure occurs when using thick paper COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A higher setting will delay activation of the clutch unit 0 02 sec f thick paper is not fed as far as the registration roller increase the setting 10 93 mm CHAPTER 10 TROUBLESHOOTING jim G Function Mode 4 Caution To select an item use the keypad To execute an item use the Start key To stop an item use the Stop key To clear an item use the Clear key Be sure that the copier is in standby state when executing any item Description Remarks Stirs toner The developing assembly main motor will rotate 4 min The pre exposure lamp LA2 and the blank exposure lamp LA3 will turn on and all high voltage outputs will turn off Releases the m
156. ed Fixing roller roller assembly Photo Vertical path pu sensitive roller 1 e I S 55 5 E v d 5 12 Cassette Pick up Feed Separation roller roller roller Figure 5 501 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 5 PICK UP FEEDING SYSTEM B Sequence of Operations jam detection 1 Registration Delay Jam Start key Jam indicator ON flashed Sequence STBY INTR SCFW 5 SCFW 5 approx approx 1 5sec 1 5sec Jam check i n 5 Pick up solenoid SL1 p SL1 m m Feed roller clutch CL2 Registration paper sensor Normal Error P 5 Main motor 1 Figure 5 502 2 Registration Stationary Jam Start key Jam indicator ON flashed V V Sequence STBY INTR SCFW SCRV 5 1 1 Jam check I I Pick up solenoid SL1 p SL1 m Feed roller clutch CL2 Registration paper sensor Main motor M1 COPYRIGHT 1998 CANON INC Normal 1 Varies according to paper size Figure 5 503 CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON Error 4 mg CHAPTER 5 PICK UP FEEDING SYSTEM 3 Delivery Delay Jam
157. ed immediately after power on Thermistor TH1 Turn off the power switch and disconnect Replace the thermistor TH2 J108 and J109 on the DC controller PCB Connect the probes to J108 2 and J108 3 DC controller PCB and then J109 1 and J109 2 on the harness Replace the DC controller side Is the resistance about 0 Q After the PCB check be sure to connect J108 and J109 Triac Replace the power supply PCB Is the End problem corrected DC controller PCB Check the wiring from the power supply PCB to the DC controller PCB if normal replace the DC controller PCB COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 43 mm CHAPTER 10 TROUBLESHOOTING 3 E002 E003 Checks Actions Main thermistor Execute service mode 412 error clear to clear E002 or E003 Open the front door and the top unit and let the fixing roller cool sufficiently Turn on the power switch Does any of the following apply The fixing heater fails to turn on e E000 Turn off the power switch and let the fixing roller cool sufficiently Turn on the power switch and select service mode 109 fixing main thermistor detection temperature display Does the reading remain unchanged at 109 After the check be sure to turn off the power switch See the appropriate section Check the wiring from J108 on the DC controller PCB to the t
158. eeder Registration Figure 1 702 COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 1 17 CHAPTER 2 BASIC OPERATION This chapter provides outlines of the copier s various mechanical workings Process speed 105 mm s BASIC MECHANISMS 2 1 E Inputs to the DC Controller 2 9 A Functional Construction 2 1 F Outputs from the DC Controller 2 12 B Outline of the Electrical Circuitry 2 2 G Inputs to and Outputs from C Basic Sequence of Operations 2 4 Accessories 1 1 2 16 D Main Motor M1 Control Circuitry 2 8 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 2 BASIC OPERATION BASIC MECHANISMS A Functional Construction The copier can broadly be divided into the following four functional blocks pick up feeding exposure image formation and control Control system Exposure system Control panel gt Copyboard tir N Scanning Control circuitry Optical assembly assembly A r SESS Seep eee Image formation system Primary charging
159. eeding screw became locked and will immediately indicate E013 on the control panel and stop responding to a press on the Start key Main motor drive command DC controller PCB Waste toner feeding screw locked detection signal TRQMLDT Flag PS8 Cleaning blade rr f Ko j SN Waste toner feeding Jio screw 299 Spring clutch CE mm ae e Figure 4 205 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 4 17 EN CHAPTER 4 IMAGE FORMATION SYSTEM Iii D Monitoring the Waste Toner Box The copier monitors the waste toner box in two levels The amount of waste toner inside the waste toner box is checked by the waste toner sensor The waste toner sensor is a pair of photosensors light emitting cell and light receiving cell and is designed to generate the waste toner full detection signal TNFDT when waste toner blocks the light between the two photosensors The DC controller PCB monitors the state of the waste toner sensor at all times when the voltage of the waste toner full detection signal TNFDT drops below the reference voltage it will identify the condition as pre waste toner full condition and will flash the Waste Toner indicator on the control panel When the waste toner box is not set the light blocking plate blocks the light between the photosensors causing the copier to flash the Waste Toner indicator
160. emove the lens motor 3 Figure 3 514 3 18 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 3 EXPOSURE SYSTEM 2 Removing the Mirror Motor 1 While the copier is in standby state press the Enlarge key to move the lens and the No 4 No 5 mirror unit to 20046 position 2 Turn off the power switch and disconnect the power plug Caution Whenever you are disassembling assembling the copier be sure to turn off the power switch and disconnect the power plug 3 Remove the copyboard glass See p 7 14 4 Remove the developing assembly See p 4 37 5 Remove the drum unit See p 4 28 6 Remove the upper right cover See p 7 10 7 Disconnect the connector 1 qp Figure 3 515 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 3 19 mmE CHAPTER 3 EXPOSURE SYSTEM 8 Remove the two mounting screws 2 and remove the lens hood 3 r Caution When mounting the lens hood take care not to trap the wire Figure 3 516 9 Remove the two mounting screws 4 and 5 N remove the mirror motor 5 GR ES Yom ZA If N BS Te Des J A pel qe a 4 Figure 3 517 3 20 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 199
161. ence control Control key control display Original density detection Scanning lamp on voltage control Power supply High voltage output Waste toner full detection Cassette size detection ADF and sorter DC power supply 10 604 CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING E Variable Resistors Light Emitting Diodes and Check Pins by PCB Of the variable resistors VR light emitting diodes LD and check pins used in the copier those needed for servicing work in the field are discussed r Caution 1 Some LEDs retain current even when off and emit dim light This is a normal condition and must be kept in mind 2 VRs that may be used m the field bras 3 VRs that must not be used in the field esee eee G Caution Do not use the VRs or check pins not found in the tables They are for factory use and require special tools and high accuracy 1 DC Controller PCB 15 1 B12 B1 B13 B1 2 1 8 1 B9 B1 J101 J104 J102 J112 J120 J103 1r 3109 1 15 1 A12 A1 A13 A1 A9 1r 34 4 J108 A1 B15 J107 A15 B1 1 5 4 J124 1 J106 J110 1 A16 A1 1 8 5 Ta 5 5 J122 J121 SW102 J131 J105 B1 B16 NV Figure 10 605 COPYRIGHT 199
162. ensitive drum of charges surface potential as post copying operation Table 2 102 CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON Discharges the last copy 2 7 CHAPTER 2 BASIC OPERATION ds D Main Motor M1 Control Circuitry 1 Outline Figure 2 105 shows the circuit used to control the main motor M1 and the circuit has the following functions Turning on and off the main motor Controlling the rotation of the main motor DC controller Power supply PCB PCB 2 Main motor Clock pulse generator J209 J601 TARNA 4 J106 J212 Phase Drive 1 17 MM DR gl 1 2 2 control current drive 16 MM_LKDT 9 4 4 circuit Hall IC output Clock pulse Reference signal Figure 2 105 2 Operation The main motor is a DC motor equipped with a built in clock pulse generator which generates clock pulses according to the rotation of the motor while the motor rotates The phase control drive circuit matches the phases of the clock pulses and the reference signals to control the rotation of the main motor When the main motor drive signal MM DR from the DC controller PCB goes 1 the phase control drive circuit turns on thereby rotating the main motor at a specific speed 3 Detecting an Error The phase control drive circuit sends the main motor lock detection signal LKDT 0 to th
163. ensor 5 3 1 3 1 When the light blocking plate is at PS5 UT A 24 sy Delivery paper PS 2 2 Eximpp When PS6 has detected paper 1 sensor 6 3 1 When the light blocking plate is at PS6 T T J18 J796 J107 3 3 9 9V Multifeeder Ps 5 7 When PS7 has detected paper 1 paper sensor 2 4 8 A7 When the light blocking plate is at PS7 HVT Power supply id J34 J302 7 5y 4301 PCB Waste toner J210 J212 J106 feeding screw 2 s 10 TRQMLDT See p 4 17 locked sensor VT J742 J107 ny Multifeeder 3 A9 paper widh pso H AUIMLTPD1 sensor 1 2 A10 TIT J743 m See p 5 9 Multifeeder paper widh Ps10 H A14MLTPD2 sensor 2 2 UT COPYRIGHT 1998 CANON INC Figure 2 106 CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 2 9 CHAPTER 2 BASIC OPERATION ds 2 Inputs to the DC Controller 2 3 DC controller PCB A 5V 3 1 3 5 3 B5 Right door PS11 1 3 1 7 1 7 When the right door ls closed 1 open sensor 2 2 2 6 2 6 When the light blocking plate is at 511 T T Power supply J301 PCB J210 J212 J106 Waste toner 4 4 js SITNFDT When the waste toner box is identified as sensor being full or the waste toner box is absent 1 J15 J721 J720 J102 1 3 3 3 an V Toner Sensor T1 2 2 2 2 B2 TNEMP When the level of toner drops below a
164. er 2 Table 10 709a COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 89 Description Notation Signal Connector mm CHAPTER 10 TROUBLESHOOTING Remarks Detects the presence absence of an accessories counter OPCNT J102 A12 ON present Detects the rotation of the scanner cooling fan front SCFAN DT J104 B2 ON on Detects the rotation of the exhaust fan EXFANO DT J104 B8 ON on Detects the rotation of the exhaust fan EXFAN1 DT J104 B11 ON on Cassette 1 size detection 0 CSTSO Cassette 1 size detection 1 CSTS1 Cassette 1 size detection 2 CSTS2 Cassette 1 size detection 3 DSW102 1 setting ON DSW102 2 setting ON DSW102 3 setting ON DSW102 4 setting ON DSW102 5 setting ON DSW102 6 setting ON DSW102 7 setting ON DSW102 8 setting ON IPC detection presence absence ON absence Mirror home position detection J103 B8 OFF at HP Lens home position detection J103 B5 OFF at HP Table 10 709b 10 90 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON Description Notation Connector CHAPT
165. eration In the diagrams represents the path of mechanical drive where a signal name accompanies the symbol the arrow indicates the direction of the electric signal The expression turn on the power means flipping on the power switch closing the front door and closing the delivery unit door which results in supplying the machine with power 2 In the digital circuits 1 is used to indicate that the voltage level of a given signal is High while 0 is used to indicate Low The voltage value however differs from circuit to circuit In practically all cases the internal mechanisms of a microprocessor cannot be checked in the field Therefore the operations of the microprocessors used in the machines are not discussed they are explained in terms of from sensors to the input of the DC controller PCB and from the output of the DC controller PCB to the loads The descriptions in this Service Manual are subject to change without notice for product improvement or other purposes and major changes will be communicated in the form of Service Information bulletins All service persons are expected to have a good understanding of the contents of this Service Manual and all relevant Service Information bulletins and be able to identify and isolate faults in the machine ii COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON System Configuration The copier
166. es vertical Min 10 33 10 The copy has white spots vertical ote 10 34 11 The copy has white lines vertical etica 10 34 12 The copy has white spots 10 35 13 The back of the copy is soiled 10 36 14 The copy has faulty fixing 10 37 15 The copy has a displaced leading edge 10 38 16 The copy has a displaced leading edge 10 38 17 The copy has a displaced leading edge 10 38 18 The copy has a blurred image 10 39 19 The copy is foggy horizontally 10 39 20 The copy has poor sharpness 10 40 21 The copy is blank 10 41 22 The copy is solid black 10 41 IV TROUBLESHOOTING MALFUNCTIONS 10 42 A GODI E uias uu avente 10 42 Wes nore 10 42 2 10 43 3 E002 EO003 susirna insisi 10 44 is ren 10 45 5 inicios 10 45 EO0139 pes ae 10 46 Ta E0980 iustior 10 46 92 10 47 9 E202 The keys on the control panel fail to operate 10 47 10 E2098 rane oir ens 10 48 uu zi 10 48 12 E220 ecce rts 10 49 19 E201 ether 10 49 14 E710 ET11 isa 10 49 15 E712 dite sites 10 50 16 E717 553 xni Es 10 50 COPYRIGHT 1998 CANON INC V VI TZ E800 ees 10 51 AO NOU 10 5
167. eveloping AC bias Transfer charging assembly Static eliminator Pre exposure lamp LA2 Blank exposure lamp LA3 Voltage control Un Partial activation Un JPN Un Un Scanning lamp LA1 4 2 COPYRIGHT 1998 CANON INC Figure 4 102 va CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A CHAPTER 4 IMAGE FORMATION SYSTEM C Controlling the Intensity of the Scanning Lamp 1 Outline Figure 4 103 shows the circuit used to control the intensity of the scanning lamp and the circuit has the following functions 1 Turning on off the scanning lamp 2 Controlling the intensity of the scanning lamp controlling the light to a specific intensity against fluctuations in power supply voltage Thermal fuse FU1 DC controller Power supply Lamp regulator Bo PCB _ PCB Scanning lamp 0203 501 LA1 Drive 6 circuit 0106 J106 24 AC 24V ON 24l detection mee circuit JL J211 2503 0106 J212 5V s 4 LMPDR 21 4 2 8 LMP 17 3 3j 6 LMPDT 19 E P 1 n Figure 4 103 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 4 3 ms CHAPTER 4 IMAGE FORMATION SYSTEM Iii 2 Oper
168. ews 4 and detach the motor base 5 and the timing belt 6 Caution When detaching the motor base be sure to mark its position at its four corners When mounting it on the other hand be sure to refer to these markings 11 Holding the bent A pull the scanner 7 _ 8 until it reaches the hole B then remove the two screws 7 12 Remove the two tension springs 8 and detach the scanner drive cable front 9 and the scanner drive cable rear 10 Figure 3 506 3 14 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A CHAPTER 3 EXPOSURE SYSTEM 3 Routing the Scanner Drive Cable Route the scanner drive cable following the sequence indicated in Figure 3 507 i e 1 through 7 Be sure to adjust the mirror position and the tension as indicated later after routing the scanner drive cable Figure 3 507 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 3 15 CHAPTER EXPOSURE SYSTEM umm 4 Adjusting the Position of the Mirror Be sure to adjust the position of the mirror as follows after you have mounted the scanner drive cable 1 Keep the mirror positioning tool nearby Arrange the mirror positioning tool FY9 3009 050 as shown to adapt it to the copier Figure 3 508a Rear Figure 3 508b Front 2 Fitthe mirror positioni
169. f unwanted toner The copier turns on off the ten LEDs at the center using the blank exposure lamp center activation signal CNDR and controls the 15 LEDs each at front and rear by means of serial data communication using the following signals blank exposure lamp serial data signal BLK SD blank exposure lamp serial data clock signal BLK_SCK blank exposure lamp serial data latch signal BLK LCK e blank exposure lamp drive enable signal DEN blank exposure lamp power supply line BLK PW DC contr FUB E nn amp o EU NE 9V js 8 LED circuit A10 BLK SD 6 40 pcs pA BIKSCK 5j A12 BLK LCK 4j ui circuit A13 BLK 3 ag 7 4 14 BLK CNDR 2l 15 BLK PW 1l A7 9 T MER 4 ee E Figure 4 112 4 12 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A CHAPTER 4 IMAGE FORMATION SYSTEM 2 Turning On the Blank Exposure Lamp in Reduce Mode While the original is being illuminated in Reduce mode as many LEDs both front and rear as suited to the selected reduction ratio are turned on to blank out the non image widths on the photosensitive drum regardless of the selected paper size 3 Turning On the Blank Exposure Lamp in Direct Enlarge Mode
170. ge margin Is YES End margin the problem corrected Registration clutch 6 Setthe meter range to 30 VDC and YES 1 Replace the registration clutch CL1 Registration measure the voltage between J211 7 2 Check the registration roller for roller and J211 6 on the power deformation and wear supply PCB Does it change from 0 DC controller PCB to 24 V while the scanner is moving NO Check the wiring from J106 on the 10 38 COPYRIGHT 1998 CANON INC forward DC controller PCB to CL1 if normal replace the DC controller PCB CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING 18 The copy has a blurred image Cause Checks Actions Scanner cable Does the cable wind on the cable pulley in layers while the scanner is moving Route the cable once again 2 If the cable is twisted or frayed replace it Scanner rail Move the No 1 mirror mount slowly by hand Does it move smoothly Clean the surface of the scanner rail with alcohol Then apply a small amount of lubricant Photosensitive drum Developing gear Drum drive system Is the problem noted at intervals of about 9 4 cm Is the problem noted at intervals of about 3 2 cm 19 The copy is foggy horizontally Checks 1 Check the drum gear 2 Check the end of the drum in contact with the developing roller for scratches and protrusi
171. he cassette 2 Mount the copy tray to the copier Copy tray When drum unit installation mode has been executed press the Reset key to end service mode Place the Test Sheet on the copyboard Check to make sure that there is no glass and make copies using each abnormal noise cassette Then check the copy images Check to make sure that as many copies as set are made normally Check the copies images made at each default reproduction ratio If images are not optimum perform the Image Adjustment Basic Procedure p 10 3 Check to make sure that copying operation in each copying mode is normal Check to make sure that the counter operate normally Make user mode settings and service mode settings 5 to suit the user s needs Clean up the area around the machine If you are installing accessories e g sorter install them according to their respective Installation Procedures Fill out the Service Sheet COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 8 9 mm CHAPTER 8 INSTALLATION F Supplying Toner Work Checks remarks Open the front door Turn the toner supply lever counterclockwise to unlock the developing assembly Tonner supply lever Holding the grip pull the developing assembly to the front until it stops Holding the toner cartridge horizontal shake it left and right several times
172. he following signals DV AC DR developing AC bias drive signal DV AC CNT developing AC bias control signal DV DC DR developing DC bias drive signal DV DC CNT developing DC bias control signal DC controller COPYRIGHT 1998 CANON INC Power supply HVT Frequency switching circuit Control circuit Reference voltage circuit ca 106 J212 J210 J301 143 12l l 5 6 DV AC CNT l 14 11 4 7 DVACDR IT i 12 ER 6 5 DV_DC_DR i Hiat 7 4 i d i 2 Voltage detection circuit Oscillation circuit Short circuit detection circuit Voltage detection circuit Transformer Oscillation control Amplifier circuit Short circuit detection circuit Transformer Y Voltage detection circuit Transformer Oscillation control c Short circuit detection circuit Figure 4 109 Sp Aled CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON Dev 4 7 mm CHAPTER 4 IMAGE FORMATION SYSTEM Iii 2 Turning On Off the Developing DC Bias b Turning On Off the Developing DC Bias When DV DC DR is 0 Oscillation control circuit turns off DC high voltage transformer turns
173. hecks as in I O display mode while making copies select the appropriate copying mode before pressing the User Mode key Hold down the 2 and 8 keys on the keypad at the same time for 0 5 sec or more Press the User Mode key once again The copier will indicate 1 on its control panel as soon as it enters service mode The copier will end service mode in response to a press on the Reset key Selecting Service Mode Select the mode you want for making checks or adjustments Table 10 701 using the keypad The 10 s place will switch to indicate the input numeral The copier will start making copies in response to a press on the Start key using the settings that were effective immediately before the start of service mode Press the AE key The copier will indicate a 3 digit number and the 100 s place will start to flash and 10 and 1 s places will turn on Select the mode you want to use for making checks or adjustments using the keypad The 10 s and 1 places will serve to indicate the input numerals The copier will return to the condition in step 1 above in response to a press on the AE key Press the Start key to execute the selected service mode The copier will return to the condition in step 3 in response to a press on the AE key while it is executing service mode 10 82 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTE
174. hermistor if normal replace the thermistor Sub thermistor TH2 Turn off the power switch and let the fixing roller cool sufficiently Turn on the power switch and select service mode 110 fixing sub thermistor temperature display Does the reading remain unchanged at 110 After the check be sure to turn off the power switch Check the wiring from J109 on the DC controller PCB to the thermistor if normal replace the thermistor Thermistor TH1 TH2 Is the thermistor in even contact with the upper fixing roller Mount the thermistor correctly Thermistor TH1 TH2 Clean the area of contact of the thermistor Is the problem corrected End Operating environment DC controller PCB 10 44 COPYRIGHT 1998 CANON INC Is the operating environment as indicated nform the user that the operating environment does not meet the requirements nstruct the user not to turn on the copier before the room is warm enough Replace the DC controller PCB CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 4 E004 Cause Checks TROUBLESHOOTING Actions Fixing heater H1 Execute service mode 412 error clear to clear E004 Turn on the power switch Does the fixing heater turn on See The fixing heater fails to turn on DC controller PCB 5 E010 Cause Replace the
175. ide then detach the main thermistor 2 7 Removing the Sub Thermistor 1 Remove the fixing assembly See p 6 8 2 Open the upper delivery assembly and insert a screwdriver into the hole A to keep the upper delivery assembly from closing 3 As shown pick the hook assembly with pincers and remove the tension spring 1 2 S Figure 6 215 Figure 6 216 6 12 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 6 FIXING SYSTEM 4 5 1 2 3 4 5 6 7 COPYRIGHT 1998 CANON INC Remove the mounting screw 2 Free the harness from the harness guide and remove the sub thermistor 3 Removing the Fixing Upper Roller Remove the fixing heater See p 6 10 Remove the upper delivery assembly See p 6 16 Remove the lower delivery assembly See p 6 17 Remove the three mounting screws 1 and remove the fixing upper inlet guide assembly 2 Remove the double gear 3 and the C ring 4 then detach the gear 5 and the bushing 6 Remove the C ring 7 and detach the gear 8 and the bushing 9 Remove the fixing upper roller 10 Figure 6 220 CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 6 13 ENEMCHAPTERO6 FIXING SYSTEM Emm NI 9 Rem
176. ier s connector 8 8P At this time be sure to fit the harness in the harness guide as shown 5 Mount the rear cover and the grounding wire 9 attachment to the copier and secure the device to the rear cover together with the grounding wire 9 with four screws 10 use the screws that come with the device 6 Remove the slack from the cable between the copier and the device and bundle together any excess length and secure it in place with the harness band 11 8 16 COPYRIGHT 1998 CANON INC I 11 Figure 8 506 CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON ES CHAPTER 8 INSTALLATION T Shift bits 4 of the DIP switch SW2 12 on the device s PCB to ON so that the communication with the copier will be IPC communication 8 If IC6 13 is mounted on the PCB shift bit 7 of the DIP switch SW2 to ON otherwise keep bit 7 at OFF Caution If the ROM IC6 13 is not mounted you need not mount one newly 2 If you want to mount the ROM IC6 13 for upgrading or replace it be sure to shift bit 7 of the DIP switch 14 SW2 to ON 9 Set each bit of the DIP switch SW3 15 as indicated in Table 8 501 Switch Setting Description SW3 1 All SW3
177. ier s power plug and turn on the power switch to check the operation of the Control Card IV N COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 8 13 mmE CHAPTER 8 INSTALLATION V INSTALLING THE REMOTE DIAGNOSTIC DEVICE II Keep the following in mind when installing the Remote Diagnostic Device II to the copier Be sure to observe the relevant laws and regulations of the country Be sure to check that the copier has properly been installed before starting the work Be sure to keep the copier s power plug disconnected during the work Be sure to identify the screws by type length diameter and location icq pa TR Be sure to set the settings data to the computer at the service station in advance 8 14 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 8 INSTALLATION 1 Remove the two screws 1 and detach the top cover 2 2 Connect the connector 3 of the power supply unit to the connector 4 as shown 3 Remove the copier s rear cover then remove the sheet 5 and cut off the face plate 6 Figure 8 503 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 8 15 mmE CHAPTER 8 INSTALLATION 4 Lead the harness through the opening in the rear cover made by cutting off the face plate in step 3 and connect the connector 7 and the cop
178. iii IV OPERATING THE MACHINE A Control Panel 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 1 9 20 21 10 m DIMATRI B5 B4 11 1 DA4TRE B4 if 1 B4 e A3 B5 e A4 LTR 1 10 mm EIAS B4 AJLTR BS 1 184 gt A4LTR E A4LTR BA B5 1 11 in 50 Interrupt A DOC 22 23 Name 24 25 26 27 28 Figure 1 401 Description Remarks Sorter key Press it to select or deselect Sort Staple Sort or Group Sort mode Requires a sorter or stapler sorter Sorter indicator Indicates the selected delivery mode It remains off in non sort mode 2 on 1 Page Separate key Fit Page key Press it to select or deselect 2 on 1 or Page Separate mode Press to select or deselect Fit Page mode Use the mode to make a copy covering all image area of the original Requires an ADF Photo key Press it to select or deselect Photo mode Reduce Direct Enlarge key Press it to select Reduce Enlarge default ratio or reset any ratio to Direct Default Ratio indicator Indicates the selected default reproduction ratio Control Card indicator Flashes when the control card is not set properly Requires a Control Card Unit Jam indicator Flashes when a jam occurs Toner indicator Flashes when t
179. ing assembly Are its height and position normal wire 4 Is the transfer charging assembly set NO 1 Clean the charging wire securely 2 Set the charging assembly securely Copy paper 5 Try paper fresh out of package Is the YES 1 The paper may be moist Instruct problem corrected the user on the correct method of storing copy paper 5 2 Inform the user that the use of E paper of a type not recommended by Canon may not always bring E about good results Lower transfer 6 Measure the resistance between the YES 1 Check to make sure that the guide varistor lower transfer guide and the metal transfer guide is not in contact with portion of the feeding assembly Is it the metal area of the feeding 0 Q assembly e g side plate 2 Replace the varistor High voltage NO 1 Check the continuity of the high cord DC voltage cord controller PCB 2 Check the high voltage power supply primary transfer and the DC controller PCB Developing 7 Is the developing assembly set NO Check the developing assembly assembly securely Are the rolls of the locking lever developing assembly firmly in contact with the photosensitive drum z E Toner sensor 8 Is toner in the developing assembly NO Check the tone sensor Then supply TS1 toner A Photosensitive 9 Replace the drum unit Is the problem YES End drum corrected Developing NO Check the control system of the bias control developing bias 10 30 COPYRIGHT 1998 CANON INC
180. ing DC bias V CPY DNS V F1 110 1 00 F1 25 120 1 09 F1 5 130 1 18 F1 75 140 1 27 F2 150 1 36 F2 25 160 1 45 F2 5 170 1 54 F2 75 180 1 63 F3 190 1 72 F3 25 200 1 81 F3 5 210 1 91 F3 75 220 2 00 F4 230 2 09 F4 25 240 2 18 F4 5 250 2 27 F4 75 260 2 36 F5 270 2 45 F5 25 280 2 54 F5 5 290 2 63 300 2 72 310 2 81 315 2 90 330 3 00 347 5 3 16 365 3 32 382 5 3 48 400 3 64 425 3 86 450 4 09 475 4 32 500 4 55 525 4 77 550 5 00 4 102 COPYRIGHT 1998 INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 4 11 ms CHAPTER 4 IMAGE FORMATION SYSTEM Iii F Controlling the Blank Exposure Lamp 1 Outline The blank exposure lamp is an LED array 40 built in LEDs and its activation is controlled by a static method All LEDs of the blank exposure lamp are turned on while the photosensitive drum is rotating and in addition the scanner is not exposing an original so as to prevent adhesion of excess toner to the photosensitive drum The farthest LED each at front and rear is kept on at all times as long as the photosensitive drum is rotating The charges on the photosensitive drum are removed in appropriate widths according to reproduction ratios and paper sizes while the scanner is exposing an original thereby preventing adhesion o
181. ing bias DC V F7 5 equivalent 7 F5 0 equivalent Density of original Lighter Darker Test Sheet Newspaper Figure 4 209 7 5 js 1 Y I gr Figure 4 210 4 22 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 4 IMAGE FORMATION SYSTEM mm Ill DISASSEMBLY ASSEMBLY The copier may be disassembled and assembled as shown here Pay attention to the copier s mechanical characteristics along with the steps for disassembly assembly Important 1 Turn off the power and disconnect the power plug to ensure safety whenever disassembling assembling the copier 2 Unless otherwise noted assemble the parts by reversing the steps used to disassemble them p Identify the screws by type length diameter to avoid use in the wrong location 4 Use a washer where needed The mounting screws used for the grounding wire and varistor come with a washer to ensure electric continuity Do not forget to use these washers 5 Asarule do not operate the copier with any of its parts removed COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 4 23 EN CHAPTER 4 IMAGE FORMATION SYSTEM do A Scanning Lamp Assembly 1 Removing the Scanning Lamp 1 Remove the copyboard glass See 7 14 B 2 Holding the bend A pull out the scanner ERE as far as the cut off B jj Ss
182. irection of Enlarge by the drive coming through gears and drive belt At this time the No 4 No 5 mirror unit moves by the drive coming from the mirror motor in the direction of Enlarge Reduce according to how much the lens moves reproduction ratio thereby varying the optical length Mirror motor drive command Mirror motor M4 Mirror home position detection signal MRRHP DC controller Enlarge PCB Lens home position sensor PS2 Lens motor drive command Lens home position detection signal LNSHP Figure 3 201 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 3 3 CHAPTER EXPOSURE SYSTEM umm NNI 2 Motor Control Circuit The lens motor M3 and the mirror motor M4 are 4 phase stepping motors and are controlled by the motor drive power supply signal COM and four drive pulse signals A B A B generated by the DC controller PCB The direction of rotation of the motor is switched by changing the timing at which the four drive pulse signals A B A B are generated The motor drive power supply signal COM is used to supply 24 V when rotating each motor It is used to provide 5 V when the motors are at rest thereby ensuring that the lens and the No 4 No 5 mirror unit remain still against vibration DC controller PCB 24V J101 J38
183. is mode 0 will be set under 510 However 510 settings may be changed after making changes in this mode Paper Sizes Available under No 505 506 Paper Size vertical x horizontal in mm BOLIVIA 216 0 x 355 0 ARGENTINE OFICIO 220 0 x 340 0 ARGENTINE LEGAL 220 0 x 340 0 AUSTRALIAN FOOLSCAP 206 0 x 337 0 FOOLSCAP 215 9 x 330 2 FOLIO 210 0 x 330 0 GOVERNMENT LEGAL 203 2 x 330 2 ECUADORAN OFICIO 220 0 x 320 0 OFFICIO 216 0 x 317 0 ARGENTINE LETTER R 220 0 x 280 0 KOREAN LEGAL R 190 0 x 268 0 GOVERNMENT LETTER R 203 2 x 266 7 ARGENTINE LETTER 280 0 x 220 0 GOVERNMENT LETTER 266 7 x 203 2 KOREAN LEGAL 268 0 x 190 0 10 710 10 96 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING l Counter Mode 6 To select an item use the keypad To execute an item use the Start key To cancel an item use the Clear key The result obtained by multiplying the indicated value by 100 will be the actual count Description Remarks Large copy counter Small copy counter Total copy counter ADF large original page counter ADF small original page counter Count clear A press on the Start key will initialize the count 601 to 605 returning it to 0 on the control panel COPYRIGHT 1998 C
184. istor checks for overheating of the drum cleaner at all times and will indicate error code E821 on the control panel when it identifies a temperature of 55 or more 1 Copying Speed Down Sequence The copier s normal copying speed is 16 cpm A4 Direct non AE To prevent overheating of the drum cleaner assembly in continuous copying mode or overheating of the copyboard glass in enlargement mode the copier adjusts the sheet to sheet distance according to the selected copy count and the reading of the cleaner thermistor TH3 A4 Original A4 Copy Reading by cleaner Copy count at lower than 500 Copy count at 500 or more thermistor TH3 50 t0100 101 to141 142 10200 50 t0100 1101 t0141 Less than 40 C 16cpm 12cpm 12cpm 12cpm 12cpm 40 C or more 16cpm 12cpm 8cpm 12cpm 12cpm Table 4 202 4 20 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A CHAPTER 4 IMAGE FORMATION SYSTEM F Auto Density Adjustment AE 1 Outline The copier is equipped with an automatic density adjustment mechanism AE which controls the developing DC bias to suit the density of originals As long as the original is of even density the AE mechanism is capable of ensuring copies free of fogging by changing the developing DC bias to suit the density of the original 2 Measuring the Density of the Original In initial rotation state INTR the scanning lamp
185. ive command PU SL Cassette paper detection signal CSTPDT Separation roller Figure 5 201 5 2 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON HEEEEE CHAPTER55 PICK UP FEEDING SYSTEM B Sequence of Operations pick up feeding e A4 2 Copies Start key ON Sequence STBY INTR SCFW SCRV SCRV LSTR STBY 5 AER Main motor M1 y y FW RV Scanner motor M2 el 5 Scanner home position sensor PS1 a Hess N r Pick up solenoid SL1 E 5 Registlation paper sensor PS5 EC 5 Registlation roller clutch EL ee 5 Feed roller clutch CL2 Delivery paper sensor PS6 das did nm COPYRIGHT 1998 CANON INC Figure 5 202 CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON mg CHAPTER 5 PICK UP FEEDING SYSTEM Emmm C Operation of the Cassette Lifter When the cassette is pushed inside the copier the lifter stopper will be freed and the lifter will move up by the force of a spring At this time the copy paper will push up the paper detecting lever of the cassette paper sensor PS4 to enable detection of the presence absence of copy paper The rear end guide plate is slid in conjunction with the upward movement of the lifter to improve pick up perfo
186. ize switch assembly slides normally by the work of the spring 8 pressure 5 24 COPYRIGHT 1998 CANON INC Dec d LA Figure 5 624 RNAS 2 3 4 5 Figure 5 626 CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 5 PICK UP FEEDING SYSTEM 2 Changing the Cassette Size AB INCH 1 Slide out the cassette 2 Loosen the mounting screw 1 on the left EL D side of the cassette then slide the size a switching block 2 to the desired size position and fix it in place a Ei nella INCH Figure 5 627 3 Remove the mounting screw 3 then slide the size switching lever 4 to the desired size position and fix it in place d Figure 5 628 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 5 25 mmm CHAPTER 5 PICK UP FEEDING SYSTEM 3 Adjusting the Left Right Registration Turn the adjusting screw 1 until the cassette locking lever plate 2 and the cassette locking lever 3 engage When the adjusting screw 1 is turned clockwise the cassette locking pl
187. le 7 201 Power switch Start key Power switch ON ON OFF V V V7 Sequence WMUP WMUPR STBY INTR SCFW SCRV LSTR STBY S Mirror heater H2 E s Cassette Drum heater H3 E mmm Accessory Cassette heater H4 i Figure 7 202 Each heater is supplied with power when the copier s power switch is turned off The mirror heater and the cassette drum heater and the accessory cassette heater may be deprived of power by turning off the heater switch SWI 4 ADF and Sorter For the ADF and the sorter the copier s power supply PCB supplies AC power to the accessory power supply PCB which generates DC power 7 6 COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A CHAPTER 7 EXTERNALS AUXILIARY MECHANISMS mm C Protection Mechanisms of the Power Supply Circuitry The copier s power supply PCB is equipped with a circuit breaker CB1 CB2 and a fuse FUI FU2 on its AC input side To protect against overcurrent and over voltage the copier is also equipped with an overcurrent protection circuit and an over voltage protection circuit When an overcurrent or an over voltage occurs as a result of a short circuit in the power line the respective protection mechanism will turn on to stop the output of the power supply PCB When the output is stopped disconnect the copier s power plug and turn off the AC power to the power supply PCB to reset the protection mechanism Caution
188. ler fails to rotate Multifeeder solenoid SL2 DC controller PCB Set the meter range to 30 VDC and connect the probes to J107 B3 and J107 B4 on the DC controller PCB Does the voltage change from 0 to 24 V when the Start key is pressed Check the wiring from the DC controller PCB to the multifeeder solenoid if normal replace the solenoid Replace the DC controller PCB Multifeeder roller clutch CL3 DC controller PCB Set the meter range to 30 VDC and connect the probes to J107 B1 and J107 B2 Does the voltage change from 0 to 24 V when the Start key is pressed 30 The registration roller fails to rotate Cause Checks Check the wiring from the DC controller PCB to multifeeder roller clutch if normal replace the clutch Replace the DC controller PCB Actions Registration paper sensor PS5 Is the registration paper sensor normal See the instructions on how to check photointerrupters Check the wiring from the DC controller PCB to the registration paper sensor if normal replace the sensor Registration roller clutch CL1 DC controller PCB COPYRIGHT 1998 CANON INC Set the meter to the 30 VDC and connect the probes to J211 7 and J211 6 Does the voltage change from 0 to 24 V when the Start key is pressed Check the drive gear for damage Check the wiring from the DC controller PCB to registrati
189. lt Keypad Use it to set a copy count or to enter a numeric value Start key Press it to start copying Stop key Press it to stop continuous copying Power Save key Press it to select or deselect power save mode Power switch Press it to turn on or off the power Copy Density Slide it to adjust the copy density manually lever AE key Press it to select or deselect AE auto density adjustment mode Zoom key Press it to select a reproduction ratio 50 to 200 in 1 increments Hold it down to increase decrease the ratio continuously User Mode key Press it to set or change user mode settings Interrupt key Press it to stop an ongoing copying run to make a copy of a different original ID key Press it after entering an appropriate ID number Press it also after entering a number for ID registration Clear key Press it to reset the copy count to 1 or to clear any wrong input when making settings Applies to the NP7161 only Table 1 402 COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 1 11 EH CHAPTER 1 GENERAL DESCRIPTION a B User Mode 1 Outline The copier provides user modes which may be changed freely by the user These modes provide the functions shown in the following table Notation Item Description Factory settings default UO0 Resetting user mode Use it to reset new settings made in user
190. me will indicate E001 on the control panel 6 6 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 6 FIXING SYSTEM mm ll DISASSEMBLY ASSEMBLY The copier may be disassembled and assembled as shown here Pay attention to the copier s mechanical characteristics along with the steps for disassembly assembly Important 1 Turn off the power and disconnect the power plug to ensure safety whenever disassembling assembling the copier 2 Unless otherwise noted assemble the parts by reversing the steps used to disassemble them 3 Identify the screws by type length diameter to avoid use in the wrong location 4 Use a washer where needed The mounting screws used for the grounding wire and varistor come with a washer to ensure electric continuity Do not forget to use these washers 5 As a rule do not operate the copier with any of its parts removed COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 6 7 mmm CHAPTER 6 FIXING SYSTEM A Fixing Assembly 1 Construction 1 Upper roller 2 3 4 Lower roller Heat discharge roller Delivery roller 2 Locking Mechanism Locking arm Figure 6 202 3 Removing the Fixing Assembly UJ 1 Remove the rear cover CO 2 Disconnect the connector 1 1 co
191. move the mounting screw 4 and free the harness from the harness guide then detach the connector support plate 5 5 Disconnect all connectors 6 from the connector support plate 5 6 Remove the mounting screw 7 and free the harness then detach the harness guide 8 Figure 6 209 6 10 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 6 FIXING SYSTEM mm 7 Free the harness from the harness retainer 9 8 Remove the two mounting screws 10 and detach the heater support plate rear 11 9 Free the harness from the harness guide 12 and detach the fixing heater 13 m Caution 1 Do not start work if the surface of the fixing heater is hot 12 13 2 Do not touch the surface of the fixing heater 3 If the surface of the fixing heater is soiled dry wipe it Figure 6 211 5 Removing the Thermal Switch Assembly 1 Remove the fixing assembly See p 6 8 2 Disconnect the two connectors 1 Figure 6 212 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 6 11 mmm CHAPTER 6 FIXING SYSTEM 3 Remove the mounting screw 2 and detach the thermal switch assembly 3 6 Removing the Main Thermistor 1 Remove the fixing assembly See p 6 8 2 Remove the mounting screw 1 and free the harness from the harness gu
192. n 0 CNT2 turns on accessory J501 J104 4 il AG 24V LA2 Pre exposure lamp 1 DR When 0 LA2 turns on 551 J101 24V 7 45V 1 K SD AIBLK SCK AT2IBLK LCK A13 B1 K DEN A141BL K_CNDR Blank exposure gt 4 12 k 151755 161515 Figure 2 112 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 2 15 CHAPTER 2 BASIC OPERATION memm G Inputs to and Outputs from Accessories 1 1 DC controller PCB J754 J750 J120 4 AA DF TXD See the ADF Service Manual 22 2 3IDF RXD 3 3 3 2 e x Et 4 4 Accesory power Power supply To ADF i i supply PCB PCB To Sorter J120 J701 To Cassette J122 Feeding Module C1 J104 J790 2 A9 5v To Control 4 Aliiccp When 0 control card turns on Card IV N ae CCDT When 0 the card is detected AT J121 722 TA 2 ee 2 EE 5 4 To Remote B See the Remote Diagnostic Diagnostic E ae Device 11 Service Manual AS ONTP Device Il 8 6 3 1 8 Figure 2 113 2 16 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 3 EXPOSURE SYSTEM This chapter discusses the principles of operation used for the copier s lens drive unit
193. n or soiled Replace the separation pad Push up the separation pad and replace the spring Separation roller Spring 2 Wrinkles Cause Is the separation roller deformed worn or soiled Checks Replace the separation roller Replace the spring used to pull the separation roller Actions Pick up assembly Copy paper Turn off the power while copy paper is moving through the feeding assembly Is the paper wrinkled Or is the paper askew Try copy paper fresh out of package Is the problem corrected Is the paper of a type recommended by Canon Check the pick up assembly Check the registration roller The copy paper may be moist Instruct the user on the correct method of storing copy paper Advise the user to use recommended paper Paper guide Lower roller pressure Fixing assembly Upper lower roller COPYRIGHT 1998 CANON INC Is the paper guide soiled with toner or the like Is the height of the paper guide correct Is the lower roller nip as indicated Clean it Adjust the height of the paper guide Adjust it Try replacing the top unit or the lower roller CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 69 mm CHAPTER 10 TROUBLESHOOTING VI ARRANGEMENT AND FUNCTIONS OF ELECTRICAL PARTS A Sensors and Switches Figure 10 601 10 70 COPYRIGHT 1998 CANON INC
194. nd are subject to change based on future data Heat discharge roller Delivery roller FE5 3932 000 FE5 3927 000 120 000 120 000 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 9 MAINTENANCE AND SERVICING Ill SCHEDULED SERVICING CHART Note 1 Asa rule provide scheduled servicing every 60 000 copies 2 Before setting out for a visit check the Servicing Book and take parts for which replacement is expected Work Checks Remarks Report to the person in charge Check the general condition Record the counter reading Check the faulty copies Make test copies in Direct Reduce Enlarge a density of images b soiling of the background c clarity of characters d margin along the leading edge e margin on the left right f fixing registration displacement soling of backs g abnormal noise h counter operation Clean the optical assembly canning reflecting plate lens No 1 2 3 4 5 6 mirror dust proofing glass Use a blower brush if dirt is excessive use alcohol Check the waste toner case Collect the waste toner case is full Replace the transfer charging wire clean the transfer charging guide and clean the transfer guide transfer guide upper lower plate transfer separation charging assembly guide rail Dry wipe with li
195. ner projection Auto Front cassette 1 pc Pick up Manual Multifeeder 5 mm deep approx about 50 sheets of 80 g m paper Transfer Corona Separation Curvature static eliminator Cleaning Blade Fixing Heat roller 1000 W for 120V model 1050 W for 230V model 1 2 COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 1 GENERAL DESCRIPTION 3 Performance Original type Sheet book 3 D object 2 kg max Maximum original size A3 279 x 432 mm 11 17 Direct 1 1 000 ReduceI 1 0 5000 Reduce II 1 0 707 Reduce III 1 0 0816 Reproduction Reduce IV 1 0 0865 Enlarge I 1 1 154 Enlarge II 1 1 224 Enlarge II 1 1 414 Enlarge IV 1 2 000 Zoom 1 0 500 to 2 000 in 1 increments Wait time 30 sec or less at 20 C room temperature First copy 5 8 sec or less A4 Direct non AE cassette Continuous copying 999 sheets max Copy size A3 279x432 mm 11 x17 max BSR STMTR min Cassette e Plain paper 64 to 80 g m B4 A4 B5R B5 279 x 432 mm 11 17 LTRR LTR LGL Colored paper recommended by Canon B4 A4 Copy paper type Multifeeder e Plain paper 64 to 80 g m A3 B4 A4R A4 BSR B5 A5 279X432 mm 11 x17 LTRR LTR LGL STMTR Tracing paper SM 1 GNT80
196. ng tool 1 to the No 1 mirror base and the No 2 mirror base both front and rear 3 Tighten the mounting screw 2 on the cable metal fixing of the No 1 mirror base both front and rear Figure 3 509a Rear Figure 3 509b Front 4 Detach the mirror positioning tool 3 16 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON HEEEEE XCHAPTERS3 EXPOSURE SYSTEM 5 Adjusting the Tension of the Scanner Drive Cable Be sure to adjust the tension as follows after routing the scanner drive cable 1 Move the scanner to home position 2 Pull the center of the scanner drive cable with a spring gauge about 10 mm At this time adjust the position A of the tension spring 1 so that the reading of the spring gauge is 95 15 g A 1 1 117 dd d Figure 3 510 Figure 3 511 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 3 17 CHAPTER EXPOSURE SYSTEM B Lens Drive Assembly 1 Removing the Lens Drive Motor 1 Remove the copyboard glass See p 7 14 2 Holding the bend A slide out the scanner as far as the cut off B c MS Vu 3 Remove the inside cover and the delivery upper cover See p 7 11 4 Disconnect the connector 1 5 Remove the two screws 2 and r
197. ng wires are 0 06 mm in diameter 2 Stringing the Charging Wires Basically all charging wires are strung in the same way The following uses the primary charging wire as an example 1 Remove the mounting screw 1 and remove the stopper 2 and the grid plate 3 To remove the transfer charging assembly remove the three hooks a and remove the guide wire plate b Primary Charging Assembly Transfer Charging Assembly 1 a A ira i b Figure 4 315a Figure 4 315b 4 32 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A CHAPTER 4 IMAGE FORMATION SYSTEM 2 Remove the sheet front 4 and the sheet rear 5 To remove the transfer charging assembly remove the sheet front c and the sheet rear d Primary Charging Assembly Transfer Charging Assembly c Figure 4 316a Figure 4 316b 3 Remove the spring 6 and remove the charging wire 7 To remove the transfer charging assembly remove the spring e and remove the charging wire f Primary Charging Assembly Transfer Charging Assembly see cl
198. nt free paper if necessary use alcohol Clean the separation feeding assembly separation static eliminator feeding assembly Clean the fixing delivery assembly fixing upper lower roller separation claw upper lower Lubricant COPYRIGHT 1998 CANON INC Provide scheduled servicing according to the number of copies made CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 9 3 CHAPTER 9 MAINTENANCE AND SERVICING Work Checks Remarks Clean the copyboard cover and the copyboard glass Use alcohol Make test copies Make sample copies Put the sample copies in order and clean up the area around the machine Record the latest counter reading 9 4 Fill out the Service Sheet and report to the person in charge COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 9 MAINTENANCE AND SERVICING IV SCHEDULED SERVICING TABLE A Copier m Caution 1 Do not use solvents oils other than those mentioned herein 2 Keep the following in mind when cleaning checking each charging assembly e Do not use a cloth having metal powder Do not use a moist cloth Dry wipe with lint free paper and use alcohol thereafter Be sure that alcohol has dried completely before mounting back to the copier A Clen Replace X Lubricate
199. nuously The Remote diagnostic Device II communicates an interruption of count pulses The auto power off circuit has an open circuit The DC controller PCB is faulty An open circuit is detected for 5 V or 24 V at power on The exhaust fan FM2 is faulty The DC controller PCB is faulty The exhaust fan drive detection signal EXFANI DT FXFANO DT cannot be detected 0 5 sec after the start of the exhaust fan FM2 COPYRIGHT 1998 CANON INC The ozone filter is clogged The cleaner thermistor TH3 has poor contact or an open circuit The DC controller PCB is faulty CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON The cleaner thermistor TH3 detects 55 C or more 10 101 mm CHAPTER 10 TROUBLESHOOTING au r Note 1 When the diagnostic function has turned on the copier can be reset by turning it off once This however does not apply to E000 E001 E002 E003 or E004 This is to prevent the user from resetting the copier easily when the error is caused by an open circuit in the thermistor otherwise overheating and damaging the fixing roller Normally the copier will automatically turn off in about 4 sec if it is turned on without clearing E000 through E004 To clear E000 through E004 operate as follows 1 Select 412 clear E000 E004 in service mode The copier s control panel indicates the respective error code 2 Press th
200. o 32 5 C 45 5 to 90 5 F and humidity must be 5 to 85 RH Avoid areas near a water faucet water boiler humidifier and refrigerator 3 Avoid areas near a source of fire and areas subject to dust or ammonia gas Avoid direct rays of the sun As necessary provide curtains 4 The amount of ozone generated by the copier is of a level not affecting the health of the individuals around it Some individuals however may find its smell unpleasant Be sure that the room is properly ventilated 5 Select a well ventilated area If multiple copiers are to be installed in particular make sure that the exhaust from one will not be drawn into the vent of another 6 Make sure that the copier will be level 7 Keep the copier 10 cm 3 9 in or more away from any wall to provide adequate space for machine operation xus Qin 1 50cm 19 7in 50cm 19 7in min min 50cm 19 7in min Figure 8 101 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 8 1 mmE CHAPTER 8 INSTALLATION Il UNPACKING AND INSTALLATION When a piece of metal is brought in from a cold to warm place droplets of water tend to form on its surface This phenomenon is known as condensation and copiers suffering from condensation can generate blank copies If the copier has been brought in from a cold place keep it unpacked for one hour or more before starting the installation work
201. o the front to remove EJ L y lt 2 r Caution The photosensitive drum is susceptible to strong light If it was subjected to strong light for a long time it can cause copies to have white spots or black lines Whenever you have taken out the drum unit from the copier be sure to keep it in the bag used at time of Figure 4 310 installation If the bag is not at hand substitute several sheets of fresh copy paper to wrap the drum unit and keep it in a dark place When mounting the drum unit to the copier be sure to slide it along the rails and work with extra care 4 28 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A CHAPTER 4 IMAGE FORMATION SYSTEM 2 Cleaning the Photosensitive Drum If the surface of the photosensitive drum is soiled wipe it with a flannel cloth coated with toner r Caution Do not dry wipe the surface of the photosensitive drum Do not use solvent Do not use paper lint free or otherwise to avoid damaging the surface of the photosensitive drum Work briskly when cleaning the photosensitive drum to avoid unnecessarily subjecting it to light and thus affecting images If you must rotate the photosensitive drum be sure to rotate it in the same direction as it would when making copies 3 Removing the Cleaner Thermistor 1 Remove the drum unit See p 4 28 2 Remove the fixing assembly See p
202. of jam is indicated using the following codes in the 10 s and 1 s places In the case of the history the number corresponding to the keys on the keypad will be indicated in the 100 s place Description Feeding delay Feeding stationary Timing Staple stapler sorter only Power on Door open Table 10 705 10 86 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING Guide to Sorter Tray Warning No 122 Code Description 02 Overstacking Table 10 706 Guide to Sorter Stapling Warning No 123 Description Stapler down Staple Stapler safety protection Edging fault Stapling overstacking Staple stacking limit Mixed paper sizes breadthwise Staple unit absent Paper in stapler Staple absent Table 10 707 Checking the Control Panel Keys No 126 1 While the copier is in mode No 126 press all keys on the control panel except the Start key 2 Press the Start key e If O00 is indicated on the control panel all keys are normal f an error key is found the copier will indicate its respective code Table 10 708 If multiple keys are found to be faulty the copier will indicate the lowest number code only Sorter key Interrupt key Auto Zoom key Energy Saver key Photo key Clear key Image Combination Two page Separation key ID key AE key Number
203. off The above condition deprives the developing cylinder of developing DC bias When DV DC DR is 1 Oscillation control circuit turns on DC high voltage transformer turns on The above condition supplies the developing cylinder with developing DC bias Control Timing As shown in Figure 4 110 a specific developing DC bias 300 V is applied to the developing cylinder to prevent adhesion of excess toner to the photosensitive drum when copies are not being made Start key ON Sequence STBY INTR SCFW SCRV SCFW SCRV LSTR STBY 5 AER Voltage Developing DC bias control ping L Developing AC bias Figure 4 110 4 8 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 4 IMAGE FORMATION SYSTEM 3 Turning On Off the Developing AC Bias Separation Eliminator Bias a Turning On Off the Developing AC Bias e When DV AC DR is 0 control circuit turns off oscillation circuit turns off amplification circuit turns off AC high voltage transformer turns off The above condition deprives the developing cylinder of developing AC bias When DV AC DR is 1 control circuit turns on oscillation circuit turns on amplification circuit turns off AC high voltage transformer turns on The above condition supplies the developing cylinder with AC bias Turning On Off the Separation Static Eliminat
204. on Mode 5 To select an item use the keypad To execute an item use the Start key To change settings use the keypad or the and Zoom keys To store settings use the Start key To cancel an item use the Clear key Description Remarks Sets UI size See Table 10 710 Sets U2 size See Table 10 710 Sets drum cleaning 0 Disable drum cleaning standard 1 Execute drum cleaning for every 50 copies To remove dirt from the surface of the standard in Chinese mode photosensitive drum toner is deposited on the Execute drum cleaning for every 25 copies surface after copying operation and the cleaning Execute drum cleaning for every 10 copies blade is used to collect the toner together with the dirt In addition LSTR is extended by 6 5 sec Sets the copying start temperature for auto start 140 C standard mode 180 Sets the copying start temperature 160 C standard 180 C Sets the fixing target temperature for A3 A4 Standard target temperature 279 x 432mm 11 x 17 LTR Standard target temperature Standard target temperature Standard target temperature Standard target temperature Sets the fixing target temperature for B4 B5 and 0 Standard target temperature LGL Standard target temperature Standard target temperature Standard target temperature Standard target temperature Sets the fixing target temperature for A4R 5 Standard target temperat
205. on roller clutch if normal replace the clutch Replace the DC controller PCB CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 59 mm CHAPTER 10 TROUBLESHOOTING HEINE 31 The fixing heater fails to turn on Cause Checks Actions Thermal switch TSW1 Turn off the power switch and remove the fixing assembly Set the meter range to Qx1 Does the meter index swing when the probes are connected across both terminals of the thermal switch Replace the thermal switch Fixing heater H1 Turn off the power switch and remove the fixing assembly Is there continuity when probes are connected across both terminals of the fixing heater Replace the fixing heater DC controller PCB Wiring Set the meter range to 30 VDC and connect the probes to J106 21 and J105 4 on the DC controller PCB Is the resistance about 5 V 32 The Add Toner indicator does not flash turn on Cause Checks Replace the DC controller PCB Check the AC harness from the DC power supply PCB to the fixing heater Check the DC harness from the DC controller PCB to the DC power supply PCB Actions Connector Are the connector J15 of the toner sensor relay connectors J721 and J722 and the connector J102 on the DC controller PCB connected securely Connect the connectors securely Toner sensor TS1 Replace the toner sensor Is the p
206. oner correct wrong Figure 4 321 10 Wipe the charging wire with lint free paper moistened with alcohol r Caution Do not use a cloth carrying metal powder for cleaning Do not use a moist cloth for cleaning Dry wipe with lint free paper then mount only after making sure that alcohol has completely evaporated 11 Mount the sheet front and the sheet rear 12 Mount the stopper and the grid plate For the transfer charging assembly mount the guide wire plate COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 4 35 mmE CHAPTER 4 IMAGE FORMATION SYSTEM Adjusting the Height of th BT To adjust each charging wire turn its respective height adjusting screw A full turn alt Soon on the screw will change the height of the Primary l primary charging wire by about 0 5 mm and that of the transfer charging wire by about 0 7 mm 0 2mm Figure 4 322 Transfer Charging Assembly Primary Charging Assembly Mo a O gt Re I ES LS r Height adjusting Height adjusting Height adjusting screw screw screw e Height adjusting Screw
207. oner feeding screw The level of the waste toner inside the waste toner case is monitored by the waste toner sensor when the amount of the waste toner exceeds a specific level the copier flashes the Waste Toner indicator on the control panel The cleaner thermistor TH3 serves to detect overheating of the drum cleaner assembly Waste toner feeding screw Cleaning blade Waste toner feeding Developing assembly screw locked sensor s yo M U Waste toner sensor pa e E Main motor DC controller PCB Waste toner feeding screw locked detection signal TROMLDT Cleaner thermistor signal CLTH Toner empty signal TNEMP detection signal TNFDT Waste toner full Figure 4 201 4 14 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A CHAPTER 4 IMAGE FORMATION SYSTEM The copier is designed to collect more waste toner than existing models and is equipped with a paddle at the bottom of the waste toner box The paddle is linked to the movement of the cassette and is designed to tap on the bottom of the waste toner box to even out the toner inside it Cassette COPYRIGHT 1998 CANON INC Waste toner assembly Paddle Waste toner assembly Waste toner assembly Figure 4 202 CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 4 15 EN CHAPTER 4 IMA
208. oner is running out It stops flashing and remains on when toner runs out completely Paper indicator Paper Source Jam Applies to the NP7161 only 1 10 COPYRIGHT 1998 CANON INC Flashes if paper runs out in the selected cassette or the manual feed tray or when the cassette is not set properly Indicates the selected cassette or the manual tray flashes the location of a jam if any It also flashes when a jam occurs in the ADF or when the sorter or the right door needs to be checked Table 1 401 CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 1 GENERAL DESCRIPTION uum Name Description Remarks Location indicator Flashes when the waste toner box needs to be replaced When the case becomes full it stops flashing and remains on Paper Size indicator Indicates the size of the paper in the cassette selected by the Paper Select key Paper Select key Press it to select Auto Paper Select Cassette or Requires ADF Manual Feed Tray mode Copy Count Ratio Indicates the copy count ratio and the selected indicator user mode Auto Ratio key Use it to select or deselect Auto Ratio mode in Requires an ADF which the best reproduction ratio is automatically selected to suit the original and the selected paper 96 key Press it to indicate the selected reproduction ratio Reset key Use it to reset the current copy mode to defau
209. ons Check the developing assembly Check the drum drive system Actions Is the problem noted at the same location on all copies made in Direct Go to step 4 Scanning lamp LA1 Lamp regulator PCB Does the scanning lamp flicker when the scanner is moving forward Check the scanning lamp and the lamp regulator PCB Developing roller Is the developing roller soiled with toner is the roller deformed or is the area in contact with the developing roller photosensitive drum soiled with toner Clean or if necessary replace the developing roller Developing bias Scanner Feeding assembly COPYRIGHT 1998 CANON INC Is the developing bias applied correctly Make a copy in Reduce and compare it with a copy made in Direct Is the problem noted in a different location Remove the developing assembly and check the wiring then set it once again Check the scanning system Check the feeding assembly CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 39 EH CHAPTER 10 TROUBLESHOOTING 20 The copy has poor sharpness Checks Actions Copyboard glass Is the copyboard glass soiled with oil Clean the copyboard glass or the like Is the horizontal reproduction ratio in Adjust the distance between the No 1 Direct as indicated mirror and the No 2 mirror Scanner Clean the scanning lamp reflecting End plate mirro
210. ontinuous copying upper limit General plain paper Paper with rough surface Tracing paper General plain paper Paper with rough surface Tracing paper Less than 170 C 179 C 196 C 169 C 170 C or more less than 180 C 188 C 201 C 178 C 180 C or more less than 190 C 193 C 206 C 183 C 190 C or more 193 C 211 C 183 C Temperature detected by thermistor at Start key on Table 6 102 216 mm gt Paper Width gt 182 mm Target temperature immediately Target temperature during after Start key on continuous copying upper limit General plain paper Paper with rough surface Tracing paper General plain paper Paper with rough surface Tracing paper Temperature detected by thermistor at Start key on Less than 170 C 177 C 196 C 167 C 170 C or more less than 180 C 186 C 202 C 176 C 180 C or more less than 190 C 192 C 207 C 182 C 190 C or more 200 C 214 C 190 C Table 6 103 6 2 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 6 FIXING SYSTEM 182 mm Paper Width Target temperature immediately Temperature detected by Target temperature during after Start key on continuous copying upper limit thermistor at Start Key General plain paper P
211. ontroller PCB COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 63 mm CHAPTER 10 TROUBLESHOOTING ES 39 The Jam indicator fails to turn off Checks Actions Has all paper been removed from inside the copier Remove the paper Execute service mode 101 jam type display to find out which sensor detected the jam Is there paper around the sensor Remove the paper Sensor DC controller PCB Is the sensor of step 2 normal See the instructions on how to check the photointerrupters 40 The Set Control Card indicator fails to turn on Cause Checks Check the wiring from the sensor lever and each sensor to the DC controller PCB if normal replace the sensor Replace the DC controller PCB Actions Control Card IV N Can copies be made without setting the Control Card IV N Check the connector of the Control Card IV N for a short circuit Control panel PCB DC controller PCB 10 64 COPYRIGHT 1998 CANON INC Replace the control panel PCB Does the indicator turn on End Replace the DC controller PCB CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING 41 The Set Control Card indicator fails to turn off Cause Checks Actions Control card Is the Control Card set correctly Set the cont
212. oor contrast EX Slips invoices made on reddish paper C 3 Diazo copies and original pages with a high transparency can produce copies mistakenly identified as foggy copies Original pages prepared in light pencil on the other hand can produce copies mistakenly identified as light copies Checking the Copyboard Cover and Copyboard Glass If soiled clean it using a solution of mild detergent or alcohol If scratches are found replace it COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 25 EH CHAPTER 10 TROUBLESHOOTING 4 Checking the Charging Assembly Check each charging assembly for soiling and a fault on its charging wire scratches S b Clean the charging wire and shield plate of each charging assembly If dirt cannot be removed replace it c Check the height of each charging wire Check to make sure that each charging wire is not rusted f Check to make sure that the anti vibration rubber of each charging assembly is not displaced 5 Checking the Developing Assembly a Check to make sure that the rollers on both ends of the developing assembly are in contact with the drum b Check to make sure that the surface of the developing cylinder is coated with an even layer of toner 6 Checking the Paper a Check if the paper is of a type recommended by Canon b Check if the paper is not moist Try using paper fresh out of package
213. or e When DV AC DR is 0 oscillation control circuit turns off high voltage transformer turns off The above condition deprives the static eliminator of separation static eliminator bias e When DV AC DR is 1 oscillation control circuit turns on high voltage transformer turns on The above condition supplies the static eliminator with separation static eliminator bias COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 4 9 EN CHAPTER 4 IMAGE FORMATION SYSTEM do 4 Controlling the Developing DC Bias to a Specific Voltage to Suit Copy Density While copies are being made developing AC bias and developing DC bias are applied to the developing cylinder The developing AC bias is 1400 Vp p and the developing DC bias may be varied by sliding the Copy Density lever on the control panel When the Copy Density lever on the control panel is slid the CPY DNS signal will vary between 1 and 5 V The developing DC bias will then vary between 110 and 550 V Normally the optimum image is obtained when the developing DC bias is set at 270 V CPY DNS is 2 45V Developing CPY DNS DC bias V V 600 500 400 300 200 100 F1 F2 F3 F4 F5 F6 F7 F8 F9 Darker m density gt Lighter Figure 4 111 4 10 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A CHAPTER 4 IMAGE FORMATION SYSTEM Copy density Develop
214. or if normal replace the DC controller PCB COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 55 mm CHAPTER 10 TROUBLESHOOTING 25 The scanning lamp fails to turn on Cause Checks Actions Scanning lamp LA1 Is the scanning lamp mounted correctly Disconnect the power plug from the power outlet and mount the scanning lamp correctly Thermal fuse FU1 Disconnect the power plug from the power outlet and remove the thermal fuse Is there electrical continuity when the probes of the meter are connected across both terminals of the thermal fuse Replace the thermal fuse Caution The scanning lamp may have turned on abnormally the thermal fuse may have been mounted incorrectly or the cooling fan may have malfunctioned Be sure to find out the cause Scanning lamp LA1 Set the meter range to yx1 and disconnect the connector J55 Does the meter index swing when the probes of the meter are connected across both terminals of the scanning lamp Replace the scanning lamp Lamp regulator PCB Wiring Replace the lamp regulator PCB Is the problem corrected Check the AC harness from the power supply PCB and the lamp regulator PCB and the scanning lamp Check the DC harness from the DC controller PCB to the lamp regulator PCB DC controller PCB 10 56 COPYRIGHT 1998 CANON IN
215. or turn Check the wiring from the DC controller PCB to the control panel PCB if normal replace the control panel PCB Replace the DC controller PCB CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 61 mm CHAPTER 10 TROUBLESHOOTING 35 The Waste Toner Box Full indicator fails to turn off Waste toner box Checks Is the waste toner box mounted Actions Install the waste toner box Is the waste toner box full Replace the waste toner box Waste toner box Is the mouth of the waste toner box soiled Clean it If the dirt cannot be removed replace the waste toner box Connector Waste toner sensor DC controller PCB Are the connectors to the waste toner sensor connected securely Replace the waste toner sensor Is the problem corrected 36 The Add Paper indicator fails to flash Cause Checks Connect the connectors securely End Replace the DC controller PCB Actions Sensor PS4 PS7 Are the following sensors normal See the instructions on how to check the photointerrupers PS4 Cassette paper sensor PS7 Multi paper sensor Check the wiring from the sensor lever and each sensor to the DC controller PCB if normal replace the sensor Control panel PCB DC controller PCB 10 62 COPYRIGHT 1998 CANON INC Execute service mode 409 control p
216. ote If the rail is soiled clean it with alcohol and then apply a small amount of oil Scanner motor M2 Replace the scanner Is the problem End corrected DC controller PCB Check the wiring from the DC controller PCB to the scanner motor if normal replace the DC controller PCB 10 54 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING 23 The lens fails to move Checks Actions Is the lens drive belt routed correctly Correct the belt and check the gears Lens path Is the lens path free of dirt and foreign Remove any dirt and object object Does the lens move smoothly when check for any object that may pushed by hand come into contact with the lens As necessary clean and lubricate or repair Lens motor M3 Replace the lens motor Is the problem corrected DC controller PCB Check the wiring from the DC controller PCB to the lens motor if normal replace the DC controller PCB 24 The mirror fails to move Cause Checks Actions Mirror path Turn off the power and move the mirror Remove any dirt or foreign assembly by hand Does it move smoothly object in the mirror path As necessary clean and lubricate the path Mirror motor M4 Replace the mirror motor Is the problem End corrected DC controller PCB Check the wiring from the DC controller PCB to the mirror mot
217. oth upper and lower rollers are hut sufficiently warm before taking measurements Figure 6 226 Table 6 201 a Measuring the Nip When the copier finishes warm up wait for 15 minutes Then make 20 A4 copies before measuring the nip 1 Place A3 copy paper in the multifeeder and select the multifeeder as the source of paper 2 Open the copyboard over 3 Execute service mode 406 fixing nip check The copy paper will be stopped when its leading edge is about 100 mm and will automatically be discharged See Figure 6 226 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 6 15 mmm CHAPTER 6 FIXING SYSTEM B Delivery Assembly A 1 1 3 4 1 Removing the Upper Separation Claw Remove the fixing assembly See p 6 8 Remove the stepped screw 1 and detach the bend A then detach the upper delivery assembly 2 Remove the two stepped screws 3 and slide the upper separation claw assembly 4 in the direction of the arrow to remove Detach the spring 5 and detach the upper separation claw 6 2 Removing the Lower Separation edb lt Claw Remove the delivery roller See p 6 17 T Remove the two stepped screws 1 and 1 1 free the harness then detach the lower separation claw assembly 2 Figure 6 230 6 16 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 A
218. oving the Fixing Lower Roller 1 Remove the fixing upper roller See p 6 13 2 Remove the bearing 1 and the fixing lower roller 2 10 Removing the Heat Discharge Roller 1 Remove the fixing assembly See p 6 8 2 Remove the two mounting screws 1 and detach the fixing inlet guide assembly 2 3 Remove the heat discharge roller 3 r Caution If you have removed the height adjusting screw of the inlet guide be sure to perform the steps under Adjusting the Height of the Fixing Inlet Guide 11 Adjusting the Height of the Fixing Inlet Guide Loosen the two adjusting screws 1 and adjust the height of the fixing inlet guide 2 Figure 6 223 Figure 6 224 6 14 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 6 FIXING SYSTEM mm 12 Adjusting the Nip The nip is appropriate if it is as indicated in Table 6 201 If it is not as indicated relocate the tension spring 1 Note a and c are points 10 mm from both ends of copy paper Figure 6 225 Dimensions Measurements Feeding direction o b 8 0 N Center of b 4 8 0 3mm lt 0 5mm or less Be sure b
219. paper 0 5sec 4 0 5sec 1 sensor PS5 Z a po Registration roller clutch CL1 21 Feed roller clutch CL2 NENNEN 8 Delivery paper sensor 6 23 Cooling fan 1 FM1 1 Co 4 N a Exhaust fan 1 FM2 Fubspeed Haltispeed 25 Exhaust fan 2 FM4 Cassette Drum heater H2 27 Mirror heater H3 28 Counter 1 CNT1 mm mm COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A 1 B SIGNALS AND ABBREVIATIONS 1 Signals 5V ON 24V ON AE DATA AE REF BLK CNDR BLK DEN BLK LCK BLK PW BLK SCK BLK SD CLTH CPY DNS CSTPDT CSTSO CSTS1 CSTS2 CSTS3 DV AC CNT DV AC DR DV DC CNT DV DC DR EXFANO DR EXFANO_DT EXFAN1_DR EXFAN1_DT EXITPD FEED_CL HEAT_DR HEAT_ERR HVT_DR LMP_PWM LMPDR LMPDT LNS_A LNS_A LNS_B LNS_B LNS_COM LNSHP MLT_CL MLT_SL MLTPDO A 2 5VU ON signal AC AND 24V ON signal AE SENSOR OUTPUT signal AE SENSOR REFERENCE signal BLANK EXPOSURE LAMP CENTER DRIVE command BLANK EXPOSURE LAMP DRIVE ENABLE signal BLANK EXPOSURE LAMP SERIAL DATA LATCH signal BLANK EXPOSURE POWER line BLANK EXPOSURE LAMP SE
220. pies made of the Test Sheet in Direct is 2 5 1 5 mm unit 0 21 mm settings to 500 2 5 1 5mm Figure 10 202 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 5 mm CHAPTER 10 TROUBLESHOOT IN GC pa 3 Left Right Registration cassette Make adjustments by moving the horizontal registration adjusting screw of the cassette so that the distance between the copy image and the copy paper is 0 2 0 mm on copies made of the Test Sheet in Direct Turn the adjusting screw 1 until the cassette locking lever plate 2 and the cassette locking lever 3 engage When the adjusting screw 1 is turned clockwise the cassette locking plate moves to the front When the adjusting screw 1 is turned counterclockwise the cassette locking lever plate 2 moves to the rear 3 Figure 10 203 Figure 10 204 10 6 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING B Exposure System 1 Routing the Scanner Drive Cable Route the cable following steps 1 through 7 and perform the steps under Adjusting the Tension of the Cable and Adjusting the Position of the Mirror 4 E Wind 11 times Figure 10 205 COPYRIGHT 1998 CANON INC
221. ping blade be sure to put copy paper on the developing cylinder before mounting the developing blade so as to protect the cylinder 3 Removing the Developing Cylinder 1 Remove the developing blade See p 4 37 2 Remove the mounting screw 1 and remove the magnet positioning plate 2 Figure 4 329 4 38 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A CHAPTER 4 IMAGE FORMATION SYSTEM 3 4 5 Remove the grip ring 3 and remove the developing roll 4 Remove the two mounting screws 5 and remove the bearing holder front 6 and the bearing 7 Remove the two mounting screws 8 and remove the gear support plate 9 Caution Take extra care when removing the gear support plate The gear will be freed 6 7 8 COPYRIGHT 1998 CANON INC Remove the E ring 10 and remove the gear 11 Remove the grip ring 12 and remove the gear 13 Remove the gear 14 CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 7 GILLS o E 0 Q JL m 22 Figure 4 332 4 39 mmE CHAPTER 4 IMAGE FORMATION SYSTEM 9 Remove the two mounting screws 15 then remove the bearing holder rear 16 bearing 17 and developing roll 18 10 Remove the developing cylinder 19
222. r When the user sets the slide guide of the multifeeder to the width of copy paper the multifeeder paper width sensor 1 PS9 and the multifeeder paper width sensor PS10 operating in conjunction with the movement of the side guide detect the width of the copy paper The identified width is used for blank exposure and fixing temperature control The length of copy paper in multifeeder mode is detected with reference to how long the registration paper sensor PS5 remains on Slide guide front Slide guide rear Multifeeder paper width DC detection signal 1 MLTPD1 controller uitifeeder paper width PS9 PCB detection signal 2 MLTPD2 Slide guide front Multifeeder tray Figure 5 302 Paper width mm Paper width gt 257 257 2 Paper width gt 216 216 2 Paper width gt 182 182 2 Paper width Table 5 301 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 5 9 CHAPTER 5 PICK UP FEEDING SYSTEM 2 C Sequence of Operations pick up from multifeeder e A4 2 Copies Start key ON Sequence STBY INTR SCFW SCRM SCFW SCRV LSTR STBY S Main motor M1 AER FW RV Scanner motor M2 Em 5 Scanner home position sensor PS1 m aT Multifeed solenoid SL2 pu
223. r 2 Surface Temperature of the 6 14 Fixing Upper Roller 6 6 10 Removing the Heat Discharge 3 Activation of the aie Lee 6 14 Fixing Heater H1 6 6 11 Adjusting the Height of the Il DISASSEMBLY ASSEMBLY 6 7 Fixing Inlet Guide 6 14 A Fixing Assembly 6 8 12 Adjusting the Nip 6 15 1 Construction 6 8 B Delivery Assembly 6 16 2 Locking Mechanism 6 8 1 Removing the Upper 3 Removing the Fixing Assembly 6 8 Separation Claw 6 16 4 Removing the Fixing Heater 6 10 2 Removing the Lower 5 Removing the Thermal Switch Separation Claw 6 16 Assembly 6 11 3 Removing the Delivery Roller 6 17 CHAPTER 7 EXTERNALS AUXILIARY MECHANISMS l PANS 7 1 1 Removing the Copyboard IL POWER SUPPLY 7 4 CIE 7 14 A Outline of Power Supply 7 4 amp iii ae 7 15 B Power Supply Circuitry 7 5 1 Removing the Scanner 1 AC Power Supply 7 5 Cooling Fan 7 15 2 DC Power 7 5 2 Removing the Exhaust Fan 7 16 3 Mirror Heater Cassette 3 Remove the Ozone Filter 7 17 D
224. r T2 T1 gt 70sec Possible On T1 or T2 2 180sec No possible Table 4 201 Note When the DC controller identifies a condition preceding the absence of toner there is likely to be as much as 10 g of toner inside the developing assembly In terms of A4 copies about 200 copies may be made without the addition of toner 4 16 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A CHAPTER 4 IMAGE FORMATION SYSTEM C Monitoring the Waste Toner Feeding Screw If the waste toner inside the drum cartridge cakes and as a result hinders the rotation of the waste toner feeding screw waste toner can start to leak from the pipe To prevent such a problem the copier is equipped with a waste toner feeding screw detection mechanism constructed as shown in Figure 4 206 The waste toner feeding screw is linked with a spring clutch and a flag and is rotated by the engagement of the spring clutch with the gear A The rotation of the flag is monitored by the waste toner feeding screw sensor PS8 at all times while the main motor M1 is rotating When the waste toner feeding screw locks the spring clutch is subjected to force in the axial direction and moves in the direction of the arrow causing the flag to stop rotating If the waste toner feeding screw lock signal TRQMLDT remains unchanged for 0 5 sec or more the DC controller PCB will assume that the waste toner f
225. r lens and dust proofing glass Is the problem corrected Lens drive assembly Is there dirt or foreign object in the Remove the dirt and foreign object No 4 No 5 mirror path of the lens and the No 4 No 5 As necessary clean and lubricate drive assembly mirror Does the part when pushed by hand move smoothly Photosensitive drum Replace the drum unit 10 40 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON es CHAPTER 10 TROUBLESHOOTING 21 The copy is blank Is the drum unit set securely Remove and set the drum unit once again Developing assembly Is the developing assembly set securely Remove and set the developing assembly securely Primary charging assembly Is the primary charging wire broken Spring the charging wire Developing assembly Is the developing assembly locked to the drum Check the developing assembly locking lever DC controller PCB Does the blank exposure lamp remain Check the DC controller PCB off while the scanner is moving forward Make checks as instructed under scanning lamp fails to turn on Scanning lamp Does the scanning lamp remain on LA1 during copying operation Connector Are the connectors on each PCB connected securely Connect the connectors securely High voltage cord Is there continuity between high voltage cords connected to each
226. r PCB is faulty The main motor lock detection signal MM LKDT is detected for 1 sec continuously while the main motor is being driven E013 The waste toner feedscrew is locked The waste toner feedscrew lock sensor PS8 is faulty The DC controller PCB is faulty The waste toner feedscrew lock detection signal TRQMLDT does not switch for 0 5 sec or more while the main motor is being driven E030 The total copy counter has an open circuit The DC controller PCB is faulty The total copy counter is identified to have an open circuit when the Start key is pressed or when the counter is driven E031 The accessories counter has an open circuit The DC controller PCB is faulty The accessories counter is identified as having an open circuit when the Start key is pressed or the couter is being driven E202 No code indication Keys are disabled Note 2 The scanner home position sensor PS1 is faulty The scanner motor M2 is faulty The DC controller PCB is faulty The scanner does not return to home position within a specific period of time when it is being moved The scanner home position sensor PS1 remains on during image exposure forward movement E208 The mirror home position sensor PS3 is faulty The mirror motor M4 is faulty The DC controller PCB is faulty The No 4 No 5 mirror unit does not turn on or off the mirror home position sensor PS3 wi
227. r a measurement sheet like the one shown in Figure 10 224 Note When you execute nip measurement mode service mode the copy paper will stop half way through the delivery slot It will then be discharged fully in about 15 sec COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 17 mm CHAPTER 10 TROUBLESHOOTING F Electrical System 1 Obtaining Optimum Exposure You can adjust the intensity of the scanning lamp LAT at F5 as follows effective for both AE and manual 1 Set the setting of U12 density correction in user mode to its initial value 2 Place the Test Sheet NA 3 on the copyboard and select non AE and Direct 3 Select 216 density adjusting volume voltage display in service mode 4 Slide the density adjusting volume until the copy count indicator indicates 245 as the F5 voltage 5 Make a copy 6 Check the copy image and change the setting of 326 scanning lamp on voltage adjustment in service mode using the keypad 1 A higher setting will increase the intensity making the image lighter 2 A lower setting will decrease the intensity making the image darker Intensity manual Intensity AE 7 1 2 Copy density Copy Original 1 5 9 density Test Chart density Figure 10 225 7 Press the Start key and store the setting Repeat steps 5 through 7 until an optimum image is o
228. rding to paper width 2 May be varied in user mode Figure 6 103 6 4 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON EE CHAPTEROG FIXING SYSTEM C Error Detection Circuit 1 Outline The copier s error detection circuit is constructed as shown in Figure 6 104 and monitors the following items for an error Surface temperature of the upper fixing roller Activation of the fixing heater H1 AC power line DC signal line SS SSS SS ESS SS 1 Fixing assembly L iL se REM a m 3 am y gt gt al O EE PE TR EIN z B NNI NU MES 77 77 5 ay Buffer amet circui 445V IC113 i Converter gt detection N amp ISP Figure 6 104 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 6 5 ENEMCHAPTERO6 FIXING SYSTEM umm 2 Surface Temperature of the Fixing Upper Roller The main thermistor TH1 and the sub thermistor are arranged nearby at the rear of the fixing upper roller and are used to monitor the difference in voltage between two thermistor signals
229. re 3 304 I IL and III shown in Figure 3 304 are controlled by the microprocessor on the DC controller PCB with reference to the wait position of the scanner The length from wait position to the leading edge is 18 mm The microprocessor determines how much the scanner should be moved including the distance to the leading edge according to the selected reproduction ratio and the original size or cassette size LII The distance over which the scanner is moved forward for the Ist page is determined according to the selected reproduction ratio and the original size or cassette size III The distance over which the scanner is moved forward is determined as follows the microprocessor divides the detected original size by 2 and assumes the result of the division to be the middle of the original assuming the middle to be the leading edge of the 2nd page If original size detection is not performed the microprocessor uses the cassette size when determining the distance over which the scanner should be moved The copier does not require paper size registration for the multifeeder For this reason it cancels Page Separate mode if the Start key is pressed after selecting the multifeeder COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 3 9 CHAPTER3 EXPOSURE SYSTEM umm IV OTHERS A Detecting the Original Size 1 Outline The NP7161 is equipped with auto paper selection and auto
230. re 8 706 8 26 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON ES CHAPTER 8 INSTALLATION C Installing the Mirror Heater 1 Mount the inside cover and the delivery upper cover 2 Mount the mirror heater 1 with two screws 2 3 Lead the mirror heater harness 3 through the harness guide and connect the connector 4 Figure 8 708 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 8 27 CHAPTER 9 MAINTENANCE AND SERVICING This chapter provides tables of periodically replaced parts and consumables durables and scheduled servicing charts PERIODICALLY REPLACED PARTS 9 1 Ill SCHEDULED SERVICING CHART 9 3 A COPIEI cider on erige 9 1 IV SCHEDULED SERVICING TABLE 9 5 Il CONSUMABLES AND DURABLES 9 2 A CODIOI cce pe rece tacente teda 9 5 eJ annee 9 2 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 9 MAINTENANCE AND SERVICING mm l PERIODICALLY REPLACED PARTS Some of the parts of the copier need to be replaced on a periodical basis to ensure a specific level of performance regardless of external appearance or presence absence of damage Plan replacement so that it coincides with a scheduled servicing visit
231. re the front door and delivery Close the door and cover closed properly the cover properly Power source Is the rated voltage present at the This is not the copier s power outlet problem Inform the user accordingly Is the rated voltage present between Go to step 6 J1 1 and J1 2 J1 is found near the power cord mount Rest omitted m If you want to find out the possible causes faulty parts associated with a specific problem see the items under Cause In the case of the above i e AC power is absent you may suspect the power plug doors and covers or power source B If you want to find out the checks to make or the actions to take for a specific problem follow the instructions under Checks and Actions in sequence Answer the question Yes or No and if your answer matches the answer given under Yes No take the action given under Actions otherwise go to the next step and work likewise COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 1 mm CHAPTER 10 TROUBLESHOOT IN GC tam Step Checks Yes No Is the power plug connected to the power outlet Is the front door closed properly Is the rated voltage present at the power outlet Rest omitted Actions Connect the power plug Close the door properly This is not the copier s problem Inform the
232. reproduction selection functions and these functions require identification of the size of originals To enable identification the copier uses the following original size detection by the ADF NP7161 2 Detection of the Original Size by the ADF The size of originals is detected when originals are fed by the ADF For details see the ADF Service Manual 3 10 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 3 EXPOSURE SYSTEM V DISASSEMBLY ASSEMBLY The copier may be disassembled and assembled as shown here Pay attention to the copier s mechanical characteristics along with the steps for disassembly assembly Important 1 Turn off the power and disconnect the power plug to ensure safety whenever disassembling assembling the copier 2 Unless otherwise noted assemble the parts by reversing the steps used to disassemble them p Identify the screws by type length diameter to avoid use in the wrong location 4 Use a washer where needed The mounting screws used for the grounding wire and varistor come with a washer to ensure electric continuity Do not forget to use these washers 5 Asarule do not operate the copier with any of its parts removed COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 3 11 CHAPTER3 EXPOSURE SYSTEM A Scanner Drive Assembly 1 Removing the Scanner Motor
233. rmal replace PS8 Replace the DC controller PCB Actions Total copy counter CNT1 Turn off the power switch and disconnect J102 from the DC controller PCB Set the meter range to 1 KQ and connect the probes to J102 A11 and J102 A10 Is the resistance about 500 Q Check the wiring from the DC controller PCB to the counter if normal replace the counter Total copy counter CNT1 DC controller PCB 10 46 COPYRIGHT 1998 CANON INC Connect J102 to the DC controller PCB and turn on the power switch Set the meter range to 30 VCD and connect the probes J102 11 and J102 A10 on the DC controller PCB Does the voltage change from about 0 to about 24 and then to about 0 V when the Start key is pressed Replace the counter Replace the DC controller PCB CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON es CHAPTER 10 8 E031 Cause Checks TROUBLESHOOTING Actions Accessory counter CNT2 Accessory counter CNT2 DC controller PCB 9 E202 The keys on the control panel fail to operate Turn off the power switch and disconnect J102 from the DC controller PCB Set the meter range to 1 KO and connect the probes to J102 A13 and J102 A12 Is the resistance about 500 Q Connect J102 to the DC controller PCB and turn on the power switch Set the meter range to 30 VDC and connect the probes to J102A13 an
234. rmance Rear guide plate Figure 5 205 5 4 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 5 PICK UP FEEDING SYSTEM The copier s cassette is designed to apply auxiliary pressure on paper of B4 or wider The auxiliary tension spring acts on the lifter through the cut off in the bottom of the cassette when the side guide plate is slid to the outside In the case of paper narrower than B4 the spring remains slack and therefore does not act on the lifter Auxiliary pressure spring Cut off Auxiliary pressure lever Figure 5 206 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 5 5 mm CHAPTER 5 PICK UP FEEDING SYSTEM D Detecting the Size of the Cassette 1 Outline The presence of paper and the size of paper inside the cassette are checked by the cassette size switch PCB mounted to the left of the cassette slot When the cassette is set in the copier the cassette paper size switching block and the AB Inch switching block act on the cassette size switch PCB to enable detection of the presence absence of a cassette and the size of paper inside it The cassette paper size switching block slid to the front and rear by the work of the cam linked to the cassette paper size dial causing the cassette paper size switching block to turn on off the cassette size switch PCB The AB Inch switching block
235. roblem corrected Control panel PCB DC controller PCB 10 60 COPYRIGHT 1998 CANON INC Execute service mode 409 control panel check Does the Add Toner indicator turn on Check the wiring from the DC controller PC to the control panel PCB if normal replace the control panel PCB Replace the DC controller PCB CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON es CHAPTER 10 TROUBLESHOOTING 33 The Add Toner indicator fails to turn off Checks Actions Open and close the front door Does it turn off Connector Are the connector J15 of the toner sensor relay connectors J721 and 720 and connector J102 on the DC controller PCB on the DC controller PCB connected securely Connect the connectors securely Toner sensor TS1 DC controller PCB 34 The Waste Toner Box Full indicator fails to flash turn on Cause Replace the toner sensor Is the problem corrected Checks End Replace the DC controller PCB Actions Connector Are the connectors up to the waste toner sensor connected securely Connect the connectors securely Waste toner sensor Replace the waste toner sensor Is the problem corrected End Control panel PCB DC controller PCB COPYRIGHT 1998 CANON INC Execute service mode 409 control panel check Does the Waste Toner Box Full indicat
236. rol card correctly DC controller PCB Can copies be made Replace the DC controller PCB Control Card IV N Replace the Control Card IV N COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 65 mm CHAPTER 10 TROUBLESHOOTING V TROUBLESHOOTING FEEDING PROBLEMS A Copy Jams The copier may be divided into the following in terms of where copy paper tends to jam 1 Pick up feeding assembly 2 Fixing delivery assembly The instructions on how to remove copy paper in the following tables are organized according to location You may find out the location and the nature of each jam in service mode 107 2 1 Figure 10 501 10 66 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON es CHAPTER 10 TROUBLESHOOTING 1 Pick Up Feeding Assembly Checks Actions Cassette Does the jam occur when paper is picked up from the cassette Is the cassette set in the copier correctly Go to step 8 Set the cassette correctly Try a different cassette Is the problem corrected Check the inside of the cassette for foreign matter Copy paper Is the copy paper curled wavy or the like Replace the copy paper Instruct the user on the correct method of storing copy paper Try paper of a type recommended by Canon Is the problem corrected Advise the user to us
237. rum Heater and Accessory Counter Assembly 7 18 Cassette Heater 7 6 1 Removing the Counter 4 ADF and Sorter 7 6 Assembly 7 18 C Protection Mechanisms of the Main Motor Assembly 7 18 Power Supply Circuitry 7 7 1 Removing the Main Motor DISASSEMBLY ASSEMBLY 7 8 Assembly aes 7 18 A External 7 9 DC Controller PCB 7 19 1 Removing the Right Door 7 10 1 Removing the 2 Removing the Upper DC Controller PCB 7 19 Right Cover 7 10 2 Points to Note When Replacing 3 Removing the Upper the DC Controller PCB 7 19 Left 7 11 Removing the Power Supply PCB 7 20 4 Removing the Delivery 1 Removing the Lower 7 11 Power Supply PCB 7 20 5 Removing the Delivery Removing the High Voltage Upper 7 11 Power Supply 7 20 6 Removing the Lower 1 Removing the High Voltage Inside Cover 7 12 Power Supply PCB 7 20 B Control 7 13 Lamp Regulator
238. sette size indicator identical Set the cassette size indicator once again Right door Is the right door closed securely Close the right door securely Is the leading edge of copy paper as far as the registration roller See The registration roller fails to rotate Pick up roller Is the pick up roller soiled or worn If the pick up roller is soiled clean it with alcohol If it is deformed by wear replace it Registration clutch CL1 Feeding clutch CL2 Pick up solenoid SLI DC controller PCB 10 58 COPYRIGHT 1998 CANON INC Open the right door and press the Copy Start key while holding paper over the right door open closed sensor Does the feeding roller or the pull out roller rotate Set the meter range to 30 VDC and connect the meter probes to J107 B8 and J107 B9 Does the voltage reading change from 0 to 24 V when the Start key is pressed Check the drive gear for damage Check the wiring from the DC controller PCB to each clutch if normal replace the clutch Check the wiring from the DC controller PCB to SL1 if normal replace SL1 Replace the DC controller PCB CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 29 Pick up operation fails multifeeder Checks Is the leading edge of copy paper as far as the registration roller TROUBLESHOOTING Actions See The registration rol
239. settings label 28 on the device and record the settings of each switch 21 Secure the top cover 29 in place with two screws 30 At this time check to make sure that the cable is fixed in place with the cable guide and is not trapped by the top cover 29 8 22 COPYRIGHT 1998 CANON INC Figure 8 519 CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON VI INSTALLING THE ACCESSORY COUNTER 1 Open the front door then remove the inside cover and cut off the face plate 1 2 Remove the delivery lower cover and mount the accessory counter 2 to the counter assembly 3 Connect the connector 3 of the accessory counter to the connector 4 of the counter assembly CHAPTER 8 INSTALLATION mm Figure 8 603 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 8 23 CHAPTERS INSTALLATION 4 Remove the delivery lower cover and set the DIP switch SW102 on the DC controller PCB as indicated in Table 8 601 5 Mount the delivery lower cover and the inside cover and close the front door 6 Connect the copier s power plug and turn on the power switch to check the operation of each counter SW102 5 SW102 6 Settings OFF OFF Accessory counter not connected ON OFF Uses the accessory counter as a small size copy counter Uses the a
240. signal from the DC controller PCB HVT DR HVT drive command DC controller Power supply PCB PCB HVT THUS 71 poem ETT E RUE PE CHEN CE ee TY 106 J212 J210 J301 Transformer 15 10 3 8j Oscillation y HVT_DR control circuit AR Short circuit no load detection circuit d btlTr Reference Current my voltage circuit detection circuit _ ee ee Figure 4 108 2 Turning On Off the Primary Transfer Bias a When the primary transfer bias is off When HVT DR is 0 Oscillation control circuit turns off Primary transfer high voltage transformer turns off b When the primary transfer bias is on When DR is 1 Oscillation control circuit turns on Primary transfer high voltage transformer turns on 4 6 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 4 IMAGE FORMATION SYSTEM mm E Controlling the Developing Separation Static Eliminator Bias 1 Outline Figure 4 109 shows the circuit used to control the developing static eliminating bias and the circuit has the following functions 1 Turning on off the developing DC bias 2 Turning on off the developing AC bias separation static eliminator bias 3 Controlling the developing DC bias to a specific voltage to suit copy density The above control mechanisms are driven by t
241. t 1000 W 120 V 1050 W 230 V Other than WMUP the heater is subjected to phase control and is turned on at 805 w 120 230 V or off The fixing temperature is detected with reference to the surface temperature of the upper roller rear end detected by the main thermistor TH1 and the sub thermistor TH2 and is communicated to the microprocessor on the DC controller PCB Based on the thermistor signal TH1 TH2 the DC controller PCB turns on off the fixing heater drive signal HEAT DR to turn on off the fixing heater H1 thereby keeping it at the target temperature To cut off AC power to the heater in the event of overheating a thermal switch TSW 1 is mounted at the front of the fixing upper roller The copier is designed to remove toner adhering to the upper or the lower roller for this reason its heat discharge roller is kept in firm contact with the lower roller Fixing sub thermistor signal TH2 24V GND O TSWI Aii HEALDR pc pond HEAT EAT ERR controller THI PCB Fixing main thermistor signal TH1 TH2 KEG y mms Fixing upper ne roller Delivery roller Pressure 67 Heat discharge roller NE NE NE NE NEN NEN NN Figure 6 101 Reference Fixing heater 1000 W for the 120 V model 1050 W for the 230 V model Thermal switch 230 10 C COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED
242. the removed metal fixing While opening the delivery assembly Pressure remove the fixing assembly releasing Press re release plate front plate 1 each at front and rear You release plate rear will not be using the removed fixing assembly releasing plate Fixing delivery assembly COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 8 3 EN CHAPTER 8 INSTALLATION C Mounting the Drum Unit Work Checks remarks Turn the toner supply lever counterclockwise to unlock the developing assembly Toner supply lever Remove the thumb screw and remove the dummy drum You will be using the thumb screw when mounting the drum unit Store away the dummy drum for possible relocation of the machine Take out the drum unit from the box and remove the cushioning material and the protective sheet r Caution Take care not to damage the surface of the photosensitive drum Take care not to subject the photosensitive drum to light unnecessarily Keep the labels for later use 8 4 Set the drum unit to the copier by sliding it along the rails and secure it in place using the thumb screw used to fix the dummy drum in place COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 8 INSTALLATION Work Checks remarks
243. thin a specific period of time while the No 4 No 5 mirror unit is being moved The lens home position sensor PS2 is faulty The lens motor M3 is faulty The DC controller PCB is faulty The lens unit does not turn on or off the lens home position sensor PS2 within a specific period of time when the lens unit is being moved The lamp regulator PCB is faulty The DC controller PCB is faulty The scanning lamp turns on during standby The scanning lamp turns off during copying 10 100 COPYRIGHT 1998 CANON INC The power supply frequency is faulty The power supply PCB is faulty The intervals of the zero cross signals exceed the allowed intervals for 50 60 Hz CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING Cause Description The DC controller PCB is faulty IC114 IPC on the DC controller PCB cannot be initialized at power on The DC controller PCB is faulty An IPC communication error has been detected twice or more within 1 sec at power on The DC controller PCB is faulty The ADF controller PCB is fault The ADF cable is faulty A communication error with the ADF controller PCB cannot be cleared The DC controller PCB is faulty The Remote Diagnostic Device II PCB is faulty A condition in which a response from the Remote Diagnostic Device II cannot be received occurred three times conti
244. tifeeder Pick Up Roller 1 Remove the developing assembly See p 4 37 2 Remove the drum unit See p 4 28 3 Remove the E ring 1 then while pushing down the multifeeder separation pad 2 to free it from pressure detach the multifeeder pick up roller 3 4 Removing the Separation Pad 1 Execute service mode 402 multifeeder holding plate release in standby state so as to lift the multifeeder holding plate 1 Figure 5 618 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 5 21 CHAPTER 5 PICK UP FEEDING SYSTEM 2 2 Turn off the copier and disconnect the power plug Caution Whenever you need to perform disassembly assembly work be sure to turn off the copier and disconnect its power plug 3 Open the right door 4 Remove the mounting screw 2 and slide the multifeeder separation pad assembly 3 in the direction of the arrow to remove Figure 5 619 4 5 Detach the multifeeder separation pad 5 from the holder 4 5 Adjusting the Pressure of the Separation Pad If double feeding or pick up failure occurs loosen the adjusting screw 1 and relocate the holder 2 to adjust the force of the separation pad tension spring If pick up failure occurs move the holder in the direction of A If double feeding occurs move the holder in the direction of B Figure 5 62
245. tinuity Do not forget to use these washers 5 Asarule do not operate the copier with any of its parts removed COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 5 15 ms CHAPTER 5 PICK UP FEEDING SYSTEM A Pick Up Assembly 1 Removing the Pick Up Roller 1 Remove the cassette 2 Remove the stepped screw 1 and pull the roller support plate 2 to the front to remove 3 Remove the pick up roller assembly 3 4 Push the section indicated by an arrow and remove the two pick up rollers 4 Figure 5 602 2 Mounting the Pick Up Roller Mount the pick up roller by reversing the steps used to remove it and with the following in mind Match the boss on the pick up roller and the cut off in the holder Do not detach the rubber section of the pick up roller When mounting the pick up roller assembly to the copier be sure to position it securely face up 5 16 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON HEEEEEm CHAPTERS5 PICK UP FEEDING SYSTEM 2 3 4 2 3 wm Removing the Pick Up Drive Assembly Remove the registration roller assembly See p 5 23 Remove the E ring 1 and slide the vertical path roll 2 in the direction of the arrow Remove the bushing 3 and then vertical path roller 2 together with the gear
246. tte a Ha 5 45VR heater H4 EU rt LES 5 eO J212 J106 See p 7 4 T J54 24 3 22 7RCRSS heater 2 2 H3 Edu ur ed E BAT o accessory AC_24V_ON J201 J212 pes See p 6 5 Fixing heater 1 HEAT ERR 1 HLT Lit H1 uu PT Poss 4 _ HEAT DR RL Thermo switch To HVT TSW1 J307 J501 J51 J55 Scannimg lamp LA1 som cum ERN 000000 Es al al j Thermal fuse FU1 2203 J503 1 J211 5 J212 J106 See p 4 3 2 4 21 MPDR 3 3 17 8 PWM 4 2 19 6 LMPDT 5 1 J210 1 8 J212 J106 See p 4 6 7 4 pv DC CNT 6 13 12 DV_DC_DR 5 12 4 11 AC 10 A5IUVT DR Figure 2 109 2 12 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 2 BASIC OPERATION 2 Outputs from the DC Controller 2 4 Power supply DC controller PCB PCB J601 J209 J106 16MM_LKDT Main motor 17MM DR See p 2 8 J104 3 5 COM 1 A5 SC A Scanner motor 1 2 5 _ See p 3 7 2 A4 SC B 5 AlSC B J38 J101 ars A3INS COM 1 5 A1 LNS A Lens motor 2 E4 A2 NS A gt Seep 3 4 4 2 A4 LNS B 5 1 A Dx LNS B J J39 J103 ATMMR COM up ASIMMR A Mirror motor 2 4 AGIMMR A 3 4 4 2 A8 MMR B 5H AQMMR_B Figure 2 110
247. ultifeeder holding plate Drum unit installation mode Execute this mode at the time of drum unit installation or replacement Releases the multifeeder holding plate The drum unit and developing assembly will rotate 40 sec Checks the fixing nip Checks the fixing nip The Stop key will be disabled Checks the activation of the scanning lamp LA1 The scanning lamp will turn on for 5 sec Checks all indicators on the control panel All LEDs on the control panel will turn on for 5 sec Checks the forward movement of the scanning lamp The scanner moves forward while the key is held down The scanner moves in reverse while the key is held down Checks the activation of the pre exposure lamp LA2 The pre exposure lamp will turn on Initializes E000 E001 E002 E003 or E004 Press the Start key while the error code E000 E001 E002 E003 or E004 is indicated Moves the scanner lens and No 4 No 5 mirror unit Execute this mode before transporting the machine so that the scanner lens and No 4 No 5 mirror unit will be positioned for transportation 10 94 Initializes the back up RAM COPYRIGHT 1998 CANON INC Press 1 on the keypad and the Start key in sequence The power will turn off initializing all RAM data CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING H Opti
248. unit Power switch Reduce Enlarge Start key ON key ON key ON ON zi V V Sequence WMUP WMUPR STBY INTR 5 Scanner motor M2 Er M2 z Lens motor M3 Y m Mirror motor M4 Scanner home position sensor PS1 Lens home position sensor PS2 5 Mirror home position sensor PS3 5 EN Motor CW sensor ON Motor CCW Length varies depending on the selected reproduction ratio Figure 3 203 The copier enables adjustment of the lens or the No 4 No 5 mirror unit home position in service mode COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 3 5 CHAPTER 3 EXPOSURE SYSTEM Ill SCANNER DRIVE SYSTEM A Outline The scanner is driven by the scanner motor M2 As shown in Figure 3 301 when the scanner motor rotates in reverse direction the scanner moves forward by the drive coming through the gears drive belt and cable The scanner motor is rotated in the opposite direction to move the scanner in reverse The speed of rotation of the scanner motor when the scanner is moved forward is varied according to the selected reproduction ratio The speed when the scanner is moved in reverse however is the same regardless of the selected reproduction ratio it is about 2 5 times the speed used in Direct when the scanner is mo
249. ure BSR and LTRR Standard target temperature Standard target temperature Standard target temperature Standard target temperature Sets the fixing target temperature for ASR Standard target temperature Standard target temperature Standard target temperature Standard target temperature Standard target temperature COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 10 95 mm CHAPTER 10 TROUBLESHOOTING Description Remarks Enables disables retry for cassette pick up a retry standard operation Indicates the Jam message in response to the second registration delay jam In cassette pick up mode pick up operation will 1 Do not make a retry be executed once again without indicating the Indicates the Jam message in response to the first registration delay jam first registration delay jam Sets the count for the control card in multifeeder 0 Increment by 1 for all sizes standard pick up Increment by 2 for all sizes Selects settings to suit the site of installation Normal standard China Making changes using this mode will change the The standard target temperature for fixing will settings under 510 as follows be lowered by 10 C In addition U14 will be e If I is selected instead of 0 in this mode added to user mode T will be set under 510 e If 0 is selected instead of 1 in th
250. user accordingly B The instruction Measure the voltage between J109 1 and J109 2 on the DC controller PCB means you are expected to make the following connections Connect the positive probe of your meter to J109 1 and Connect the negative probe of your meter to J109 2 10 2 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON Pre Checks Clean the charging wires Check the height of the charging wire Set the setting of U12 density correction in user mode to a standard setting Make two to three copies of the Test Sheet NA 3 COPYRIGHT 1998 CANON INC Density Slope Adjustment Is there between front and YES Is the rear lighter Turn the adjusting screw at the rear of the primary changing assembly counter clockwise and the adjusting screw at the front clockwise 1 0 mm max each Make a copy 1 If there still is a difference after turning the adjusting screw 1 0 mm each check the charging assembly scanning lamp and scanner for dirt a difference in density NO Turn the adjusting screw at the rear of the primary charging assembly clockwise and the adjusting screw at the front counterclockwise 1 0 mm max each A full turn causes a change of 0 5 mm 2 When turning the adjusting screw clockwise be careful that the height of the charging wire is not less than 10 0 mm Solid Bl
251. ved forward The distance over which the scanner is moved varies according to the length of copy paper and the selected reproduction ratio DC controller PCB SE 285 T Scanner 98 motor M2 S2 AS Scanner home position sensor PS1 Scanner home position detection signal SCHP Figure 3 301 3 6 COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 3 EXPOSURE SYSTEM B Scanner Motor Control Circuit The scanner motor M2 is a 4 phase stepping motor and is controlled by four pulse signals SC A SC B SC A SC generated by the DC controller PCB The scanner motor is turned on off and its direction of rotation are controlled by changing the timing at which these four pulse signals are generated The speed of rotation on the other hand is controlled by switching the current supplied to the scanner motor DC controller PCB 24V J104 J37 A3 SC COM 3 A5 SC A 1 A2 SC A 4 Scanner A4 SC B 2 motor SC 5 Scanner C119 motor CPU control circuit IC117 Figure 3 302 C Relationship between Scanner Sensor and Signals Scanner u Sensor Description Foward Reverse Scanner The scanner is at home position home position sensor PS1 The scanner has reached home position Table 3 301 COPYRIGHT 1998 CANO
252. w these units may be disassembled assembled and adjusted Fixing System explains the principles used to fuse toner images to transfer media in view of the functions of electrical and mechanical units and in relation to their timing of operation It also shows how these units may be disassembled assembled and adjusted Externals Auxiliary Mechanisms shows the copier s external parts and explains the principles used for the copier s various control mechanisms in view of the functions of electrical and mechanical units and in relation to their timing of operation It also shows how these units may be disassembled assembled and adjusted Installation introduces requirements for the site of installation and shows how the copier may be installed using step by step instructions Maintenance and Servicing provides tables of periodically replaced parts and consumables durables and scheduled servicing charts Troubleshooting provides tables of maintenance inspection standards adjustments and problem identification image fault malfunction Appendix contains a general timing chart and general circuit diagrams COPYRIGHT 1998 CANON INC CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON i The following rules apply throughout this Service Manual 1 Each chapter contains sections explaining the purpose of specific functions and the relationship between electrical and mechanical systems with reference to the timing of op
253. wire COPYRIGHT 1998 CANON INC Is the problem noted at the same location on all copies CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 1 Check the scanner rail for a foreign object 2 Adjust the tension of the scanner cable Clean each charging wire 10 35 EH CHAPTER 10 TROUBLESHOOTING 13 The back of the copy is soiled Checks Actions Developing assembly Drum cleaner assembly Fixing assembly Delivery assembly 10 36 COPYRIGHT 1998 CANON INC Turn off the power switch while the copy paper is moving through the feeding assembly At this time is the back of the copy paper soiled Is the problem noted at intervals of about 5 cm Is the fixing roller upper lower soiled with toner Go to step 3 1 Clean the registration roller 2 Clean the transfer guide 3 Check the developing assembly for leakage of toner 1 Clean the feeding assembly 2 Check the drum cleaner assembly for leakage of toner 1 Clean the fixing roller upper lower 2 Check to make sure that the toner adhering to the heat discharging roller is not soiling the fixing roller If so replace the heat discharging roller 3 Clean the fixing assembly inlet guide Clean the delivery roller and the separation claw CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON HE CHAP
254. y overall Checks Actions Scanner Pre exposure lamp LA2 DC controller PCB Perform the Image Adjustment Basic Procedure Is the problem corrected Clean the scanning lamp reflecting plate side reflecting plate mirror lens and dust proofing glass Is the problem corrected Does the pre exposure lamp remain on during copying Replace the pre exposure lamp 2 Replace the DC controller PCB Developing roll Are the developing rolls worn Replace the developing rolls Developing cylinder Is the developing cylinder worn Replace the developing cylinder Scanner lamp LA1 Replace the scanning lamp Is the problem corrected End High voltage power supply PCB Replace the high voltage power supply PCB Is the problem corrected Lamp regulator PCB DC controller PCB 10 32 COPYRIGHT 1998 CANON INC Replace the lamp regulator PCB Is the problem corrected Replace the DC controller PCB CANON NP7161 NP7160 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 10 TROUBLESHOOTING 7 The copy is foggy vertical 8 The copy has black lines vertical fuzzy thick Primary charging assembly Checks Clean the primary charging wire grid plate and shielding plate Is the problem corrected Actions Scanner Clean the scanning lamp reflecting plate side reflecting plate mirror lens and dust proofing gl
255. y PCB Removing the Power Supply PCB Remove the rear cover Disconnect the fixing heater connector 1 Disconnect all connectors of the power supply PCB Free the AC harness 2 from the harness guide Remove the four mounting screws 3 and detach the power supply PCB 4 Removing the High Voltage Power Supply PCB Removing the High Voltage Power Supply PCB Remove the rear cover and the rear upper cover Disconnect all connectors of the high voltage power supply PCB and remove the faston 1 and the high voltage harness 2 Remove the mounting screw 3 and the four locking supports 4 then detach the high voltage power supply PCB 5 2 3 Figure 7 326 2 1 7 20 COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON A CHAPTER 7 EXTERNALS AUXILIARY MECHANISMS mm J Lamp Regulator PCB 1 Removing the Lamp Regulator PCB 1 Remove the rear cover 2 Disconnect the two connectors 1 of the lamp regulator PCB 3 Remove the three locking supports 2 2 and detach the lamp regulator PCB 3 Figure 7 327 COPYRIGHT 1998 CANON INC CANON NP7160 NP7161 REV 0 AUG 1998 PRINTED IN JAPAN IMPRIME AU JAPON 7 21 CHAPTER 8 INSTALLATION This

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