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SERVICE MANUAL

1. 2 Paper Feed Pathirana riii Ee 24s 1 SIded Mode iioii rro eti e ra rr re Ped ear 2 21 2 5idedMOGB iiir tenter rti rtr rr a E ona dr Composition Operation Composition Operation 3 ee 4 5 7 5 1 Document pick up mechanism essent 7 5 2 Document take up transport mechanismn pe 8 5 3 Document exit mechanism 10 5 8 1 1 5196 10 5 3 2 2 Sided mode cese ic e etie T 10 5 3 3 Exit operation TOW EE 11 5 4 Turnover mechanism 2 sided sse 12 5 5 Raised lowered position detecting 13 5 5 1 Document size detection 5 5 2 Raised lowered position detection pt 13 Theory of Operation Ver 1 0 Mar 2005 euiino uoneJedo uonisoduo5 Blank Page Theory of Operation Ver 1 0 Mar 2005 1 Product specification Outline 3 9 1 Product specification 2 On o 11 Type HE JE Name Duplexing Document Feeder iin Paper Take Up Paper Take Up from top of stack Transport Endless Belt Tra
2. 31 12 2 32 12 3 33 12 3 1 Developing Drive control 93 12 3 2 Developer flow tnnt ernannt tirer petite 33 12 3 3 DOVClOPING DIAS 3 ihrer rape en seh reo RR enn 34 12 3 4 High grade Micro Toning 34 12 3 5 Developer Scattering Preventive Mechanism 35 12 3 60 TCR Sensor control iini nine etr rer nni to Dae PLE ERR e EE 37 13 Toner Supply sectiori rene tinere te creata 39 13 1 COMPOSITION M 39 Ir 40 CEN cun 41 13 3 1 Toner Replenishing 41 13 3 2 Toner Near Empty and Toner Empty detection control 42 19 3 3 Shuttermechanism a ii eere rete c nba te ina 43 14 Transfer Corona section enero n tnn enero rotis 44 14 1 Composition nier 44 14 1 1 1stlmage Transfer 8 44 14 1 2 2nd Image Transfer 5 45 AMD EDU 46 14 2 1 1st Image Transfer section 46 14 2 2 2nd Image Transfer section 47 14 3 Operation e
3. G e g G 7 fe E 9 4 Drive system Theory of Operation Ver 1 0 Mar 2005 4 Drive system PC 102 PC 202 4348M005AA i G g S Q e G 7 fe oO Tray3 Transport Roller Motor M120 PF lt PC 202 gt Tray3 Paper Feed Motor M122 PF Tray4 Transport Roller Motor M121 PF Tray4 Paper Feed Motor M123 PF 4348M002AB eS eS te M T n RR Theory of Operation Ver 1 0 Mar 2005 5 Operations 5 Operations 5 1 Paper Feed Section 5 1 1 Vertical transport drive mechanism The Paper Feed Motor drives the Pick up Roller and Paper Take up Roller to take up and feed a sheet of paper into the main unit Then the Transport Roller Motor transports the paper through the vertical transport sec tion The Pick up Roller takes up sheets of paper and the Paper Take up and Separation Roll ers ensure that only one sheet of paper is separated and fed into the main unit When the drawer is slid in the lever is pushed to lower the Pick up Roller The Lift up Upper Limit Sensor then detects the upper limit position when the paper lift ing plate is raised The Paper Empty Sensor detects when paper in the drawer runs out The polyethylene sheet and Height difference of Guide Plate are reduces resistance between a curled sheet of paper and guide thereby preventing skewed feeding Polyethylene
4. Date Service manual Ver Revision mark Descriptions of revision Theory of O peration Ver 1 0 Mar 2005 CONTENTS Outline 1 1 1 2 tS 1 3 1 Group Group Offset tertie t e ritieni erai 1 3 2 SOL SOIt Off elus aiio maeror en re ei 1 3 3 ect 1 3 4 Center Staple amp Fold 1 4 Stapling rnt 1 5 of sheets to be stapled sort 3 1 6 Machine specifications 5 como a rr rrr tla Rire rr cor 3 1 7 Operating environment 3 2 Paper Feed Palth 5 nnne reor teet ati t i eii Eo 4 2 1 Output the 1st paper exit tray nennen nenne 4 2 2 Output the 2nd paper exit tray 4 5 Composition Operation 3 C 7 4 Te 8 5 Operations 9 Hill Wranspott Sectioh aue eiue is a tae eR 9 5 1 1 Paper path switching MeChaNisSM 9 5 1 2 Finisher paper transport mechanism pt 10 5 2 Finishing tray mechanism pt 11 5 2 1 Paper stacking with finishing 11 5 2 2 Aligning mechanism eese 12 5 2
5. 90 Theory of Operation Ver 1 0 Mar 2005 20 Fusing section 20 3 2 Fusing Roller pressure retraction mechanism To ensure prolonged durability of the Fusing Belt the Pressure Roller is retracted from the Fusing Belt during any time other than a print cycle The roller is however retracted during a print cycle using envelopes The Fusing Pressure Roller Pressure Retraction Motor is turned forward or backward to press the Pressure Roller up against and retract it from the Fusing Belt The Fusing Pressure Retraction Sensor detects the pressed position of the Pressure Roller The retracted position of the Pressure Roller is determined by counting a prede termined number of encoder pulses from the pressed position using the Fusing Retrac tion Position Sensor In reality the retracted position is where the Pressure Roller is lightly pressed against the Fusing Belt Sector Gear Pressure Operation 4036ma2106c0 Retraction Operation 4036ma2107c0 Pressure Retraction Timing Conditions Pressure Retraction Operation function etc Power Switch ON Not retracted position Pressure Retraction Heater less than 100 C Retraction Warm up Heater 100 or more Retraction Pressure At end Pressure Retraction Standby Retraction Copy At start Retraction gt Pressure At end Pressure Retraction Power Save mode ON Retr
6. 8 2 1 DI T 21 8 2 2 Color Shift Correction 22 9 Imaging Unit section IU section et 23 91 CompositiOD nouerat testo o trae ere epe Ro oae E Pe E ERU ER e 23 9 2 1 9 3 Operation Y 9 3 1 IU Fife Controls iiie iere to Da e na on PL Eva qe od FE 25 10 Photo Conductor section erret triti rate 26 10 1 26 10 2 DVE 26 bizhub C450 G e ni ie G 7 fe E 9 bizhub C450 G g Q e G 7 fe Theory of Operation Ver 1 0 Mar 2005 10 3 Operation d erede iiie rere e Rire Ete rri ter ab Spe AE 27 10 3 1 Drum Drive mechanism be 27 10 3 2 Drum Phase control nennen 27 10 3 8 PC Drum small amount rotation 28 11 Charge Corona section etn terree entente 29 11 1 Operation 11 1 1 PC Drum Charge Corona ON OFF 30 11 1 2 Cleaning Main Erase mechanism pe 30 12 Developing Second na narret e rede ative Pri erbe rrr n RES 31 T2 T S 1
7. G 7 fe E 9 Transport Motor Forward Rotation Take Up Motor Backward Rotation The original is transported onto the Original Glass The original size is determined when Registration Sensor OFF Take Up Motor OFF when Pick Up Sensor OFF v Transport Motor OFF when the original is reached to its reference position Registration Clutch ON 5 Operation Theory of Operation Ver 1 0 Mar 2005 53 Document exit mechanism o 5 5 3 1 1 sided mode 9 5 The original transported by the Transport Belt is sent to the switchback section and then BE ejected onto the Exit Tray with its face down in order to keep the original pages in proper o m order Turnover Gate Exit Switch Gate drives by spring Exit Motor M3 DF 7 07 eS Exit Solenoid SL2 DF OA 4582M005AA Turnover Solenoid SL1 DF i G g S Q e G 7 fe oO 5 3 2 2 sided mode n the 2 Sided Mode an original which has had its 2nd side scanned is ejected onto the Exit Tray without the turn over motion Face down Ejection Exit Motor M3 DF XI ate Exit Solenoid SL2 DF 4582M502AA 10 Theory of Operation Ver 1 0 Mar 2005 5 Operation 5 3 3 Exit operation flow A Document exit motion in 1 sided mode Exit Motor Forward Rotation T
8. B During a print cycle 1 Asthe paper is consumed the sensor is unblocked 2 The paper lifting plate goes up Lift up Upper Limit Sensor PC114 PF PC 123 PF 4348M620AA 4348M618AA Theory of Operation Ver 1 0 Mar 2005 5 Operations 5 2 Cassette Section 5 2 1 Paper size detection When the Trailing Edge Stop of the drawer is moved the circular plate located on the bot tom of the drawer turns allowing the four FD Paper Size Sensors on the FD Paper Size Detection Board Moving the Edge Guide activates or deactivates the two CD Paper Size Sensors through the cutout in the lever The combination of the four FD Paper Size Sensors and two CD Paper Size Sensors that are either activated or deactivated determines the size of the paper loaded in the drawer The Tray Set Sensor detects that the drawer is slid into position as it is slid in Length Detection 4348M604AA 4348M605AA Circular Plate FD Paper Size Sensors FD Paper Size Detection Board PWB I3 PF PWB I4 PF Tray Set Sensor PC122 PF PC 121 PF Width Detection 4348M606AA 4948M607AA CD Paper Size Sensor 1 PC118 PF PC127 PF CD Paper Size Sensor 2 PC119 PF PC128 PF Lift up Motor M124 PF M125 PF PC 102 PC 202 s e S lt St 9 s et s 9 102 202 i w Q 2 E 5 5
9. G 7 fe e Electronic sorting Board Standard Image Controller Processing PWB ES LED Drive Board Fusi PWB LED using LPH Y LPH M LPH C LPH BK Control Board P Slide Interface Board PWB SIF PWB MC gt lt gt Process tf 1 4 Finishing Paper DUPLEX Option Source Option Image Bus Line Control System Line 4037T2E595AA 12 Theory of Operation Ver 1 0 Mar 2005 7 Scanner section IR section 7 Scanner section IR section 7 1 Composition bizhub C450 Oo 0O pu 4037T2C550AA Original Size Detection Sensor FD1 Scanner Motor M201 Scanner Motor Drive Board PWB IC Original Size Detection Sensor FD2 2 Original Cover Angle Sensor PC202 s 5 n 7 St 9 G et s 9 CCD Unit 1 Size Reset Switch SW201 Image Processing Board PWB C Exposure Unit 4037T2E596AA Scanner Home Sensor PC201 13 7 Scanner section IR section Theory of Operation Ver 1 0 Mar 2005 1 CCD Unit lo Scanning Direction CCD Sensor a E 2 c RE EP eae 8 5 E PS 37 3 um nS es 37 3 um j E
10. 20 3 6 PPM control PPM printed pages min control is provided to ensure the condition of one power outlet for one system and at the same time good fusing performance during continuous paper feeding Only the Heating Roller Heater Lamp is preferentially turned ON during a print cycle In a continuous print cycle therefore the surface temperatures of the Heating Roller and Fusing Pressure Roller decrease resulting in the fusing performance of the printed image being degraded Fusing performance is therefore estimated based on the surface temperature of the Pressure Roller The printed pages min value is decreased according to the paper length and system speed thereby achieving the intended level of fusing per formance of the printed images toner i E A Plain paper When the surface temperature of the Fusing Pressure Roller is a predetermined temper e ature or less with the machine interior temperature at 18 or less PPM printed 5 pages min is decreased E Printed pages min PPM when the Fusing Pressure Roller G temperature is decreased System Speed Paper Length mm Stande tempera 495 C or less 125 or less ture 216 or less 45 40 36 215 mm sec 1217 to 297 inclusive 34 30 27 Color print 298 to 381 inclusive 27 24 21 382 to 432 inclusive 24 21 19 216 or less 35 31 28 165 mm sec 517 to 297 inclusive 26 23 21 Monochrome 298 to 381 inclusi
11. 1 Product specification Theory of Operation Ver 1 0 Mar 2005 1 3 2 Sort Sort offset Paper Type Paper Size Weight Tray Capacity Exit Tray No of Sheets to be Stapled Plain paper B5R B5 to 60 to 209 3 000 sheets 2nd paper Thick paper A3 Wide g m A4R 8 5 x 11R exit tray 7 25 x 10 5R or smaller 725x1051 16 to 55 5 Ib i 15 15 o 1 500 sheets B4 8 5 x 14 or larger 1 3 3 Sort staple Group staple Paper Type Paper Size Weight Tray Capacity Exit Tray No of Sheets to be Stapled Plain paper B5R B5 to to 90 g m 3 000 sheets 2nd paper 50 sheets 7 25 x 10 5R 1615 24 b A4R 8 5x 11R or exit tray 2 8 7 25 x 10 5 1 smaller to 11x 17 1 500 sheets B4 8 5 x 14 or larger 1 Cover Mode 91 to 209 g m 24 25 to 55 5 Ib 2 The number of Sheets to be Stapled is limited for high density images Color Wise 3 20 sheets x 20 sets 3 35 sheets when using Color Copy 90 paper 1 4 Stapling Staple Filling Mode Dedicated Staple Cartridge Mode 5 000 staples Staple Detection Available Nearly Empty 20 remaining staples Stapling Position Rear Diagonal 45 1 point A4 Front Diagonal 45 1 point 8 5 11 11x 17 Rear Diagonal 28 1 point B5 B4 Front Diagonal 28 1 point Rear Parallel 1 point A4R Front Parallel 1 point 8 5 x 11R 8 5 14 Side Parallel 2 points A4R B5 B5R B4 8
12. 40 Theory of Operation Ver 1 0 Mar 2005 13 Toner Supply section 13 3 Operation 13 3 1 Toner Replenishing mechanism control A Toner replenishing mechanism Toneris supplied from the Toner Cartridge of each color to the Imaging Unit of each color according to the T C detected by the corresponding TCR Sensor Asingle Toner Supply Motor is turned either forward or backward to supply toner of two different colors Toner Supply Motor for K and C and Toner Supply Motor for Y and M bizhub C450 Toner Supply Toner Supply Motor C K M3 K Toner C Toner Motor Y M M4 Y Toner M Toner Turned forward Energized Deenergized Turned forward Energized Deenergized Turned backward Deenergized Energized Turned backward Deenergized Energized When K Toner is Supplied When C Toner is Supplied Composition Operation One way clutch turns 4036 201801 4036ma2025c1 Replenishing operation 1 Drive of the Toner Supply Motor is transmitted through a gear train to the drive gears of the Toner Cartridges of two colors A one way clutch is used for each of these drive gears meaning that the drive gear turns in one direction only Either one of these two drive gears is turned according to whether the Toner Supply Motor turns forward or backward 2 Asthe drive gear turns the Metering Roller turns to replenish the supply of a pre determined amount of toner for the Imaging Unit Rotatio
13. 5 closed 2 2 2nd Image Transfer Roller Shutter 8 Retracted Open Pressed Closed 2nd Image Transfer Pressure Retraction Motor M13 IDC Sensor 2 lt ES PC9 t a gt ns c S aw 6 Ar ressure Shutter Ke wv Shutter Holder Pin IDC Sensor 1 7 When Sensor Shutter is Closed When Sensor Shutter is Open 4036ma2540c0 4036ma2541c0 52 Theory of Operation Ver 1 0 Mar 2005 14 Transfer Corona section 14 3 5 ATVC Auto Transfer Voltage Control To optimize image transfer output the machine is provided with ATVC control or Auto Transfer Voltage Control The control lets a constant current flow through each of the Image Transfer Rollers Then from the voltage detected the resistances of the 1st Image Transfer Roller 2nd Image Transfer Roller and Transfer Belt are measured The optimum image transfer output voltages applied to the 1st and 2nd Image Transfer Roll ers during printing are thereby automatically adjusted bizhub C450 A Overview of ATVC operation Output a constant current to the 2nd Image Transfer Roller Constant Voltage 4 Y Constant Measured Constant Measure the resistance value of the Current Resistance Current 2nd Image Transfer Roller Value Determine the 2nd image transfer Y E output voltage 2nd
14. 9 A negative charge which is the reverse polarity to Low humidity Bias applied the positive output from the 2nd Transfer Roller is 1 sided print applied to prevent the paper from being wound ing on the around the Transfer Belt plain paper Normal Bias applied High humidity ND through resistors Bias is applied regardless of the ambient condi tions since the paper to go to the 2nd side print on o lain 9 Bias applied cycle which has undergone the fusing process has paper P the condition equivalent to paper under low humid ity ambience Paper is stiff enough to present no separation prob GND through lems resistors To prevent separation noise grounded through resistors regardless of the ambient conditions Special paper other than plain paper 59 14 Transfer Corona section Theory of Operation Ver 1 0 Mar 2005 14 3 10 Detection of New Transfer Belt Unit e When a new Transfer Belt Unit is installed in the machine the life counter is automatically cleared through new unit detection 2 The new unit detection is made when the Power Switch is turned OFF and ON or the Left N Door is opened and closed 5 New unit detection timing operation The Power Switch is turned OFF Y and ON or Left Door opened Lets the Transfer Belt perform ini and closed tial operat
15. Move from sub tray to the main tray Theory of Operation Ver 1 0 Mar 2005 3 Composition Composition Operation 3 Composition PC 402 Tray Section Paper Feed Section 406112 102 Sub G e g G 7 fe E 9 4 Drive Theory of Operation Ver 1 0 Mar 2005 4 Drive Tray Lock Solenoid SL1 LCT PC 402 Paper Feed Motor M1 LCT Transport Roller Motor M2 LCT Elevator Motor M5 LCT i G g Q e G 7 fe 406112 101 Shift Gate Motor M3 LCT Shift Motor M4 LCT Theory of Operation Ver 1 0 Mar 2005 5 Operations 5 Operations 5 1 Paper Feed Section 5 1 1 Paper Feed drive mechanism PC 402 The Paper Feed Motor drives the Pick up Roller and Paper Take up Roller to take up and feed a sheet of paper into the main unit Then the Transport Roller Motor transports the paper through the vertical transport sec tion The Pick up Roller takes up sheets of paper and the Paper Take up and Separation Roll ers ensure that only one sheet of paper is separated and fed into the main unit When the drawer is slid in the lever is pushed to lower the Pick up Roller The Tray Upper Limit Sensor then detects the upper limit position when the paper lifting plate is raised The Upper Paper Empty Sensor
16. 1 1 9 Machine Specifications concern mrt ceni e Preig sors 1 1 4 Operating environment 1 2 Paper Feed Path Composition Operation 3 efe Ieri m n 3 4 p 3 5 SICUL TIE 4 bd P unching OperatiOri eei neret etre 4 5 1 1 4 holes oN ae n ea te doe RE c ied rn DE er 4 5 1 2 ZEN ele M 5 5 2 Side registration 6 G e ni G 7 fe E 9 Theory of Operation Ver 1 0 Mar 2005 1 1 09 Blank Page Theory of Operation Ver 1 0 Mar 2005 1 Product specification Outline 1 Product specification 1 1 Functions e x a E a e x a No of Holes optional Metric 4holes Inch 2holes 3holes 1 2 Paper type Paper Type Paper Size Weight Tray Capacity Exit Tray of Sheets to be Stapled Plain Paper 4 holes A4 A3 60 to 209 Elevator Tray Thick Paper 2 holes 8 5 x 11R g m 8 5 x 11 16 to 55 5 Ib 8 5 x 14 11x17 3 holes 8 5 x 11 11x17 1 3 Machine specifications Power Requirements Supplied from FS 603 90 mm W x
17. 7 fe 9 5 2 5 Group mode Sort mode Paperis taken back onto the Finishing Tray and then fed out onto the 1st Paper Exit Tray 4583M604AA 4583M605AA lt 1st Paper Exit Tray Paper 4583M606AA Paper Transport Finishing Tray 1st Paper Exit Tray 13 5 Operation Theory of Operation Ver 1 0 Mar 2005 5 2 6 Offset mode In the Offset Mode Paper is taken back onto the Finishing Tray and shifted to the front or rear side with the Aligning Plate Then a stack of paper per set is fed out onto the 1st Paper Exit Tray However even if printing has not been completed for all sets of prints when 10 sheets for the large size whose length is longer than 300mm or 30 sheets for the small size whose length is shorter than 299mm are stacked a set of sheets is fed out onto the 1st Paper Exit Tray FS 603 Fed out onto the 1st Paper Exit Tray 4583M607AA 5 4583M608AA Paper Stacking for 4 sets in Sort Mode a o 5 4th set 2 Srdset 2nd set 1st set 9 4583M609AA Paper Transport Finishing Tray Hh Shifted with the Aligning Plate for each job 1st Paper Exit Tray 5 2 7 Staple Mode n the Staple Mode when one complete set of prints is fed out onto the Finishing Tray stapling is performed A stack of stapled paper is then fed out onto the 1st Paper Exit Tray 4583M610AA 4583M611AA
18. s 9 16 Paper feed section Theory of Operation Ver 1 0 Mar 2005 16 3 4 There is a window in the front cover of the cassette for indicating the paper supply level When the Paper Lifting Plate goes up a red lever appears in the window The lower the level of the paper stack the more the red portion is visible Paper supply level detection control 11 4036ma2525c0 Paper Supply Level Indicator in Cassette Front Cover 4036ma2526c0 Lever 16 3 5 Paper Near Empty Paper Empty detection When the Paper Near empty Sensor is blocked a corresponding warning display is given on the control panel The paper supply level when a paper near empty condition is detected is about 50 30 sheets The Paper Empty Sensor detects a paper empty condition Tray1 A Near empty Condition An Empty Condition Tray1 Paper Near empty Sensor PC13 Tray1 Paper Empty Sensor PC2 Tray2 A Near empty Condition An Empty Condition Tray2 Paper Near empty Sensor Tray2 PC104 Paper Empty Sensor PC106 Tray2 Lift up Motor M101 70 Theory of Operation Ver 1 0 Mar 2005 16 Paper feed section 16 3 6 1 paper type setting The paper type is set from the control panel Control is provided on the machine side dif ferently as detailed below depending on the paper type setting made a System Heating Roller Set 1stImage 2ndImage Gamma S
19. 2 Lift up Motor M101 Tray2 Vertical Transport Motor M103 Tray2 Paper Feed Motor M102 Tray2 Paper Take up Sensor PC107 Tray2 Set Sensor PC103 Tray2 Paper Empty Sensor PC106 Tray2 Board 2 Tray2 Lift up Sensor PC105 Tray2 CD Paper Size Sensor S PC101 Tray2 Paper Size Board PWB I2 4037T2C532AA Tray2 CD Paper Size Sensor S PC101 67 16 Paper feed section Theory of Operation Ver 1 0 Mar 2005 16 2 Drive 16 2 1 Tray1 bizhub C450 Main Motor M1 Tray1 Paper Take up Roller 4037T2C533AA 16 2 2 Tray2 Tray2 Paper Feed Motor M102 Vertical Transport Roller 2 Tray2 Paper Take up Roller i G g S Q e G 7 fe Tray2 Pick up Roller Paper Lifting Plate 4037T2C534AA 68 Theory of Operation Ver 1 0 Mar 2005 16 Paper feed section 16 3 Operation 16 3 1 Paper Take up control Tray1 Start Key ON Registration Roller ON Registration Roller ON bizhub C450 Main Motor M1 Tray1 Paper Feed Clutch CL1 Intermediate Transport Motor M14 Registration Roller Clutch Registration Roller Sensor PC28 4036ma2121c0 16 3 2 Tray1 double feed control To reduce paper misfeed involved with double feed the Tray1 Double Feed Sensor is provided at a point immediately after the Tray1 Paper Take up Roller fthe second sheet of paper reac
20. 45 14 Transfer Corona section Theory of Operation Ver 1 0 Mar 2005 14 2 Drive 14 2 1 1st Image Transfer section bizhub C450 Transfer Belt Main Motor M1 5 4037T2C525AA 1st Image Transfer Roller K i G g S Q e G 7 fe 1st Image Transfer Roller C 1st Image Transfer Pressure Retraction Motor M11 1st Image Transfer Retraction Position Sensor PC12 4037T2C526AA 46 Theory of Operation Ver 1 0 Mar 2005 14 Transfer Corona section 14 2 2 2nd Image Transfer section 2nd Image Transfer Roller 2nd Image Transfer Pressure Retraction Sensor PC29 bizhub C450 Cam 2nd Image Transfer Pressure Retraction Motor M13 IDC Registration Sensor 2 PC9 Shutter Pressure Lever IDC Registration Sensor 1 PC8 14 3 Operation 14 3 1 Transfer Belt speed control G e S G 7 E 9 The Transfer Belt is driven by the Main Motor The appropriate belt speed is selected according to the print mode and paper type as detailed below Paper Type Print Mode Main Motor Speed mm s Monochrome 215 Plain paper Color 165 ACS Thick paper 1 2 3 enve lopes OHP transparencies 60 Glossy Mode 47 14 Transfer Corona section Theory of Operation Ver 1 0 Mar 2005 14 3 2 1st Image Tr
21. bizhub C450 PC Drum K Developing Roller Toner Collecting Screw Color Developing Motor M6 Supply Agitating Color PC Drum Conveying Screws Motor M5 4037T2C515AA i G g Q e G 7 fe 4037T2C514AA 32 Theory of Operation Ver 1 0 Mar 2005 12 Developing section 12 3 Operation 12 3 1 Developing Drive control Main Motor ON Signal TSTACTON bizhub C450 Developing Bias Y M C DC Printing DC AC 1 Main Motor M1 Color PC Drum Motor M5 K PC Motor M7 Developing Bias K Printing DC Drum Charge Corona Bias Y M C Drum Charge Corona Bias K Color Developing Motor M6 Developing Clutch K CL2 1st Image Transfer Pressure Retraction Motor M11 2nd Image Transfer Pressure Retraction Motor M13 4036ma2152c0 1 Actual timing depends the position of each PC Drum G e m G 7 fe E 9 12 3 2 Developer flow 1 Toner supplied from the front end of the Developing Unit is fed to the lower screw It is then fed to the rear of the unit while being mixed with developer and electrically charged by the Supply Agitating Conveying Screws 2 The TCR Sensor installed on the underside of the Developing Unit detects toner to carrier ratio during this time 3
22. oO MFP Control Board Cooling Fan Motor M27 Suction Fan Motor M12 Ozone Ventilation Motor M18 Cooling Fan Motor 1 M24 Power Supply Cooling Fan Motor M21 4037T2C549AA Cooling Fan Motor 3 M25 108 Theory of Operation Ver 1 0 Mar 2005 24 1 2 A Fan control Operation 24 Other control Motor Name Paper Passage Mode Control Conditions Power Supply Cooling Fan Motor M21 Turns at full speed when the Color PC Drum Motor M5 or K PC Motor M7 is energized Turns at half speed when the Color PC Drum Motor M5 or K PC Motor M7 is deenergized Deenergized in Sleep mode Ozone Ventilation Fan Motor M18 Turns at full speed when the Color PC Drum Motor M5 or K PC Motor M7 is energized Turns at full speed for the period from 0 to 120 sec after the Color PC Drum Motor M5 or K PC Motor M7 has been deenergized Turns at half speed for the period from 121 to 900 sec after the Color PC Drum Motor M5 or K PC Motor M7 has been deenergized and then is deenergized Deenergized in conditions other than above Toner Suction Fan Motor M20 Turns at full speed when either the Color PC Drum Motor M5 or Color Developing Motor M6 is energized Deenergized in conditions other than above Toner Suction Fan Motor K M23 Turns at full speed when either the K PC Motor M7 or Developing Clutch K CL2 is energized Deenergized in conditions other t
23. 1 When the Heating Roller Thermistor 1 detects 245 C or the Fusing Pressure Roller Thermistor detects 205 C before the temperature control or 230 C during the temperature control the machine displays the malfunction code representing an abnormally high temperature and prohibits the initiation of a new copy cycle This is an ordinary detection of a malfunction of an abnormally high temperature bizhub C450 2 A different protection is provided when the CPU overruns becoming unable to detect the malfunction of an abnormally high temperature If the Heating Roller Thermistor 1 2 detects 250 C or the Fusing Pressure Roller Thermistor detects 235 C the heater relay of the DC Power Supply is turned OFF through the Control Board Power supply to each of the heater lamps is then shut down If the temperature detected by the Heating Roller Thermistor 1 and Fusing Pres sure Roller Thermistor thereafter decreases the heater relay is turned ON again and supply of power to the heater lamps is resumed The sequence of these oper ations is repeated until the CPU recovers from the overrun and becomes able to detect the malfunction of an abnormally high temperature This control allows the power supply to each of the heater lamps to be shut down before the correspond ing thermostat operates Heating Roller Thermistor 2 is however protected it turns ON the heater relay only after the power switch is turned OFF and ON or the malfunction is reset
24. 4037T2E606AA 100 Theory of Operation Ver 1 0 Mar 2005 22 Image stabilization control 22 2 Operation 22 2 1 IDC Sensor LED intensity control Controls changes in characteristics due to change with time and contamination of the IDC Sensor part to part variations in the sensors and change of environment The intensity current value of the LED is adjusted on the surface of the Transfer Belt on which no toner sticks background level bizhub C450 22 2 2 Max density control The developing bias Vdc is adjusted to control changes in the solid density resulting from variations in developing characteristics and LED intensity variations in sensitivity of the PC Drum and changes in the environment durability and the amount of charge in toner Patterns are produced on the surface of the Transfer Belt and the IDC Sensor detects the amount of toner sticking to them The correction data appropriate for each color is selected based on the correction data with four different levels for each color The developing bias and grid voltage values that result in the maximum density are cal culated from the detected data and stored in memory Thereafter the grid voltage Vg value including the background margin adjustment value is calculated and stored in memory 22 2 3 Gamma correction control The intensity of LED in all gradation levels is adjusted to correct changes in gradation characteristics to a linear
25. 7 fe 4037T2C507AA 24 Theory of Operation Ver 1 0 Mar 2005 9 Imaging Unit section IU section 9 3 Operation 9 3 1 IU Life control Each IU has EEPROM that detects a new IU and keeps track of the service life of the IU A New IU detection new IU is detected when 24 V is turned ON as the Power Switch is turned OFF and ON or the Front Door is opened and closed When a new IU is detected an TCR adjustment sequence is carried out bizhub C450 Operation when a new IU is detected 1st image transfer ATVC adjustment Transfer Belt is retracted Transfer Belt cleaning Image sta bilization matic adjustment Operation when a new IU is not detected Transfer Belt Transfer Belt ist image Image sta is retracted cleanin transfer ATVC bilization 9 adjustment B When life is reached The IU Life Counter is used to keep track of IU life When the life value is reached a warning message is given on the screen When pre determined number of printed pages are produced after the life value has been reached the machine inhibits the initiation of a new print cycle with a message prompting the user to replace the IU given on the screen 4036ma2133c0 G 2 S n 7 St 9 s et s 9 When a life value is reached At print stop Please replace following unit s
26. DANGER A WARNING and CAUTION is defined as follows together with a symbol mark to be used in a limited meaning When servicing the product the relevant works disassembling reassembling adjustment repair maintenance etc need to be conducted with utmost care DANGER Action having a high possibility of suffering death or serious injur WARNING Action having a possibility of suffering death or serious injury CAUTION Action having a possibility of suffering a slight wound medium trouble and property damage Symbols used for safety and important warning items are defined as follows Precaution when servicing the A N product General Electric hazard High temperature precaution Prohibition when servicing the S CS NV S product General Do not touch Do not prohibition with wet hand disassemble Direction when servicing the Q e e product General Unplug Ground Earth instruction SAFETY AND IMPORTANT WARNING ITEMS SAFETY WARNINGS 1 MODIFICATIONS NOT AUTHORIZED BY KONICA MINOLTA BUSINESS TECHNOLOGIES INC KONICA MINOLTA brand products are renowned for their high reliability This reliability is achieved through high quality design and a solid service network Product design is a highly complicated and delicate process where numerous mechanical physical and electrical aspects have to be taken into consideration with the aim of arriving at pr
27. Monochrome print 1 sided 45 copies min 2 sided 37 copies min A4 8 1 2 x 11 Color print 1 sided 35 copies min 2 sided 31 copies min Fixed Zoom Ratios Full size x1 000 Reduction Metric Area x0 500 x0 707 x0 816 x0 866 Inch Area x0 500 x0 647 x0 733 x0 785 Metric Area x1 154 x1 224 x1 414 x2 000 Enlargement Inch Area x1 214 x1 294 x1 545 x2 000 Variable Zoom Ratios x0 250 to x4 000 in 0 001 increments o re o a E a o o a iN a 2 Product specifications 2 3 Types of Paper Theory of Operation Ver 1 0 Mar 2005 Paper Source Tray1 Tray2 Multiple Bypass Copy paper type Plain paper 60 to 90 g m 16 to 24 Ib Translucent paper OHP transparencies crosswise feeding only Thick paper 1 91 to 150 g m 24 1 4 to 40 Ib Thick paper 2 151 to 209 g m 40 1 4 to 55 1 2 Ib Thick paper 3 20 sheets or less 150 sheets or less 20 sheets or less 210 to 256 g m 55 3 4 to 68 Ib 1 Postcards Envelopes 9 10 sheets or less 10 sheets or less Labels 9 20 sheets or less 20 sheets or less Copy paper dimensions Max width x length 311 1 x 457 2 mm 12 1 4 x 18 inches 297 x 432 mm 11 x 17 inches 311 1 x 457 2 mm 12 1 4 x 18 inches Min width x length 90 x 139 7 mm 3 1 2 x 5
28. None Folding Mode Roller Pressure Folding Folding Position Center of Paper Theory of Operation Ver 1 0 Mar 2005 1 5 of sheets to be stapled sort staple A A4R 8 5x 11R or smaller 1 Product specification No of Sheets to No of Sets be Stapled Rear Parallel Center Parallel Front Parallel 2 100 40 40 3105 80 40 40 6to 10 60 40 40 11 to 20 30 30 30 21 to 30 30 30 30 31 to 50 30 sets or 1000 sheets B B4 8 5x 14 or larger No of Sheets to No of Sets be Stapled Rear Parallel Center Parallel Front Parallel 2 100 50 50 3105 80 40 40 6 to 10 40 40 40 11 to 20 30 sets or 1000 sheets 21 to 25 1 6 Machine specifications Power Requirements DC 24 V supplied from the main unit DC 5 V generated by Finisher 65 W or less Consumption Dimensions 601 mm W x 933 mm H x 603 mm D 23 75 inch W x 36 75 inch H x 23 75 inch D Weight 41 6 kg 91 75 Ib 1 7 Operating environment Conforms to the operating environment of the main unit NOTE These specifications are subject to change without notice e e o 2 Paper Feed Path Theory of Operation Ver 1 0 Mar 2005 2 Paper Feed Path 2 1 Output the 1st paper exit tray E e Aligning Offset Staple Transports to the punch position Transports to the Finishing tray Transpor
29. Theory of Operation Ver 1 0 Mar 2005 15 Toner Collecting section 15 2 Drive bizhub C450 Cleaning Brush Motor M22 Toner Collecting Roller Transfer Belt Toner Collecting Screw 4037T2C528AA i G e m G 7 fe E 9 63 15 Toner Collecting section Theory of Operation Ver 1 0 Mar 2005 15 3 Operation 15 3 1 Toner collecting mechanism Toner collected by the Cleaning Brush of the Transfer Belt and waste toner in each of the Imaging Units are conveyed by the corresponding Toner Collecting Screws to the Waste Toner Bottle bizhub C450 IU Toner Collecting Screw Waste Toner Bottle Transfer Belt Toner Collecting Screw s 5 Q s s 9 4037T2C592AA 15 3 2 Waste Toner Bottle in position detection The Waste Toner Bottle Set Sensor is provided to detect a Waste Toner Bottle loaded in position Timing for this detection is when the Power Switch is turned OFF and ON or the Left Door is opened and closed If the Waste Toner Bottle is found to be out of position the machine inhibits the initiation of a new print cycle Waste Toner Bottle Set Sensor pc32 4037T2C576AA 64 Theory of Operation Ver 1 0 Mar 2005 15 Toner Collecting section 15 3 3 Waste Toner Near Full Full detection control A Waste toner near full detection control An
30. _ SS KONICA MINOLTA SERVICE MANUAL bizhub c450 2005 03 KONICA MINOLTA BUSINESS TECHNOLOGIES INC Ver 1 0 SAFETY AND IMPORTANT WARNING ITEMS SAFETY AND IMPORTANT WARNING ITEMS Read carefully the Safety and Important Warning Items described below to understand them before doing service work IMPORTANT NOTICE Because of possible hazards to an inexperienced person servicing this product as well as the risk of damage to the product KONICA MINOLTA BUSINESS TECHNOLOGIES INC hereafter called the KMBT strongly recommends that all servicing be performed only by KMBT trained service technicians Changes may have been made to this product to improve its performance after this Service Manual was printed Accordingly KMBT does not warrant either explicitly or implicitly that the information contained in this Service Manual is complete and accurate The user of this Service Manual must assume all risks of personal injury and or damage to the product while servicing the product for which this Service Manual is intended Therefore this Service Manual must be carefully read before doing service work both in the course of technical training and even after that for performing maintenance and control of the product properly Keep this Service Manual also for future service DESCRIPTION ITEMS FOR DANGER WARNING AND CAUTION In this Service Manual each of three expressions
31. s et 9 Heating Roller Heating Roller Heater Lamp 1 H1 Fusing Pressure Roller Thermostat TS2 Fusing Roller Heating Roller Thermistor 1 TH1 Fusing Belt Heating Roller Thermistor 2 TH2 4037T2C544AA 87 20 Fusing section Theory of Operation Ver 1 0 Mar 2005 20 2 Drive Fusing Pressure Roller Pressure Retraction Motor M19 bizhub C450 Fusing Retraction Position Sensor PC34 Pressure Roller i G g Q e G 7 fe o 4037T2C545AA 88 Theory of Operation Ver 1 0 Mar 2005 20 Fusing section 20 3 Operation 20 3 1 Fusing Roller drive control A Speed change control Drive for the Fusing Unit is provided by the Fusing Drive Motor To prevent poor fusing performance the speed of the Fusing Drive Motor is changed in three steps according to the type of paper used and the copy mode bizhub C450 Paper Type Copy Mode Fusing Speed mm sec Plain paper Monochrome 215 Plain paper ACS or color 165 Special paper high gloss paper 60 B Speed stabilization To prevent double transferred image or brush effect the difference between the fusing speed and paper transport speed during image transfer is corrected The fusing speed is made either faster or slower than the system speed The two step speed control is accomplished using the Fusing Paper Loop Control
32. M3 DF 4582M501AA A Turnover operation flow Exit Motor Forward Rotation Transport Motor Forward Rotation i G g S Q e G 7 fe Turnover Solenoid ON Switching of paper path in turnover section Turnover Sensor ON Transport Motor OFF Exit Motor OFF Transport Motor Backward Rotation v Exit Motor Forward Rotation Starts the original transportation to its scan position Turnover Sensor OFF Turnover Solenoid OFF Exit Motor OFF Transport Motor OFF 12 Theory of Operation Ver 1 0 Mar 2005 5 Operation 5 5 Raised lowered position detecting mechanism 5 5 1 Document size detection 3 The 20 degree Open Detection Mechanism enables the main unit to detect the document 2 size when the DF is used as the Original Cover of the main unit there is the Lever Actu SE ator provided in the DF body that blocks or unblocks a sensor to initiate a reconfirmation E 8 a of the original size as read by the original size detection sensors 5 5 2 Raised lowered position detection The Raised Lowered Position Detection Mechanism uses a magnet installed in the DF body to allow the main unit to know that the DF is raised or lowered This magnet actu ates the Size Reset Switch on the main unit to perform this operation Lever Actuator Magnet 9 oO Q 9 7 9 E e 5 4582M5
33. PWB SIF 4037T2C581AA Name Function System Total Counter Shows the cumulative number of copies made in all copy modes A mechanical counter driven by an electric signal Counts one when an exit signal is applied to it Electronic Counter Black full color mono color and 2 color Total Counter Size Counter 2 Sided Copy Counter 2 Sided Print Displays the cumulative number of copies and prints made in each of the following copy and print modes Counter and Scanner Counter Counts one when an exit signal is applied to it Mechanical Counter option Counter for exclusively counting monochrome copies Since the Total Counter is available as standard the number of color copies can be calculated by subtracting the Monochrome Counter count from the Total Counter count Counts one when an exit signal is applied to it Key Counter option The counter that disables copying when counting the predetermined number of copies A mechanical counter driven by an electric signal Counts one when a paper take up start signal or image forming start signal whichever occurs earlier is applied to it 112 IKONICA MINOLTA SERVICE MANUAL Automatic Document Feeder 2005 03 KONICA MINOLTA BUSINESS TECHNOLOGIES INC Ver 1 0 After publication of this service manual the parts and mechanism may be subject to change for improvement of their performance Therefore the descriptions give
34. Paper Speed mm s Temperature C Transfer Transfer Vg Vde Table a Monochrome mode 215 193 Plain paper Color ACS x O mode 190 100 Plain paper 1 160 Thick paper 1 Thick paper 2 Thick paper 3 185 2nd side thick paper 3 Envelopes 5 60 10 470 amp 170 when the abso OHP transparencies lute humidity or the machine interior m temperature E exceeds the threshold value 2 O Varies depending on the paper type x Not vary 1 Glossy mode 2 The temperature threshold value of OHP is absolute humidity 18 g m The machine interior temperature threshold value of OHP is 16 Select thick paper 3 to use postcards Select thick paper 1 to use labels Ready to copy Ready to copy Memory 100 Basic Change Tray Settings gt Tray 1 c aper 5 Nod ENS ize 4 A4 D D Thanon Thick 1 Thick 2 Faso 4037 2 605 71 16 Paper feed section Theory of Operation Ver 1 0 Mar 2005 16 3 7 Paper size detection control e The width size CD and length size FD of the paper are detected The paper size is determined based on the combination of these two sizes detected 2 A Tray1 a Metric Area Tray1 Paper Size Board PWB 11 Tray1 CD Paper Size Paper Size swi S
35. Paper Transport Finishing Tray Stapling for one set of prints 151 Paper Exit Tray 14 Theory of Operation Ver 1 0 Mar 2005 5 Operation 5 2 8 Center Staple amp Fold mode n Staple section A stack of paper fed onto the Finishing Tray is stapled at two places and then transported to the Fold Section The paper transported to the Fold section is folded and then fed out onto the 2nd Paper Exit Tray The maximum number of the Center Staple amp Fold Black copy 2 to 15 sheets Max 60 pages Other copy 2to 10 sheets Max 40 pages FS 603 2 Point center stapling Fold section G e G 7 fe 9 2227 a 4583M612AA 4583M613AA Paper Transport Finishing Tray 4 2 Point center stapling B Fold Section Folding 2nd Paper Exit Tray a l 15 5 Operation Theory of Operation Ver 1 0 Mar 2005 5 3 Staple unit 5 3 1 Types and positions of staples Shown here are the different stapling positions used with the FS 601 N uc Type Paper Size Metric area Paper Size Inch area Corner stapling Rear B5 B5R A4 A4R 8 5x11 8 5x11R 8 5x14 11x17 Corner stapling Front 2 Point side stapling 2 Point center stapling A4R 8 5x11 11x17 Corner stapling Rear Corner stapling Front C40040082AA C40040081AA 2 Point side stapling 2 P
36. Product specifications a 11 Type g Name Duplex Unit E Type Switchback and Circulating Duplex Unit Installation Mounted on the right side door of main unit Center Document Alignment 1 2 Paper type Paper Type Plain paper 60 to 256 g m 16 to 68 Ib Paper Size ASR to A3 Wide 5 5 x 8 5R to 12 x 18 Print paper size width 139 7 to 311 2 mm 5 5 x 12 25 inch length 176 0 to 457 2 mm 7 x 18 inch 1 3 Machine specifications Power Requirements DC 24 V 10 supplied from the main unit DC 5 V 5 supplied from the main unit Dimensions 109 mm W x 440 mm D x 344 mm H 4 25 inch W x 17 25 inch D x 13 5 inch H Weight 2 9 kg 6 5 Ib 1 4 Operating environment Conforms to the operating environment of the main unit NOTE These specifications are subject to change without notice 2 Paper Feed Path Theory of Operation Ver 1 0 Mar 2005 2 Paper Feed Path Switchback to Main Unit x a Q 15 iS e lt paper is fed into the main unit again 4535tm1c002aa Theory of Operation Ver 1 0 Mar 2005 3 Composition Composition Operation 3 Composition Automatic Duplex Unit Switchback section G e S G 7 fe 9 Transport section 4535M001AA 4 Drive Theory of Operation Ver 1 0 Mar 2005
37. Through these control procedures the power supply to the heater lamps can be shut down before the thermostat is activated It thereby sup presses damage to the Fusing Unit itself G e ni G 7 fe E 5 3 If detection of the abnormally high temperature through approaches 1 and 2 above is not possible due to a defective thermistor or other reason the thermostat comes into play to shut down the power supply to each of the heater lamps The Heating Roller Thermostat is rated at 210 C while the Fusing Pressure Roller Thermostat is rated at 180 C The ratings do not however represent the actual surface temper ature of the corresponding rollers since the thermostats are installed in a non con tact fashion with respect to each of the rollers Ordinary protection against high temperatures HEATER DC Power Unit 5j TH3 Signal ATER ETHS HEATER_RY CE Interlock SW HEATER RY 35 1 TH3 Signal gt Sees eee eed 4037T2C579AA 95 20 Fusing section Theory of Operation Ver 1 0 Mar 2005 20 3 5 Detection of a New Fusing Unit When a new Fusing Unit is installed in the machine the life counter is automatically cleared through the machine s capability of detecting a new Fusing Unit The new unit is detected when the Power Switch is turned ON or the Right Door is opened and closed o a N
38. eese nnne nennen entretenir enne 83 2 18 1 COMPOSI i itis en Oe ER ERE 83 19 Registration Roller neenon 84 E 19 1 Composition a 1 200 19 3 Operation nennen tenen riri trier eri t Fo oe 19 3 1 Registration Roller control 85 19 38 27 OHP det amp ctiOl x Eid REGIS 86 20 FUSING 87 20 1 GompoSItlO W nere terni 87 20 2 Drive 20 3 Operation zn encender erii ed repose enia 89 20 3 1 Fusing Roller drive control 89 5 20 3 2 Fusing Roller pressure retraction mechanism 91 E 20 8 3 Fusing temperature COntrol 4 92 a 20 3 4 Protection against abnormal conditions esee 95 5 20 8 5 Detection of a New Fusing Unit et 96 8 20 3 6 PPM control s 96 8 20 3 7 Wait Control While Using OHP or Thick 97 20 3 8 WAIT control under low temperature 97 21 Paper exit section nter nen ener iuh rh irn dh EE RE Rode aaa 98 21 4 5 98 21 2 DIOS i cra pote ed E 22 Image stabilization control et 22 1 E
39. o RON o Paper Trailing Edge Sensor detects paper trailing edge Transport Motor is stopped Paper transport is stopped Punch Motor is driven to punch holes Transport Motor is driven at the same time Side Registration Motor is driven in reverse direction Punch Slide Unit is returned to its home position Trailing Edge Detection Sensor Punch Holes 4614M606AA KONICA MINOLTA 2005 MINOLTA BUSINESS TECHNOLOGIES INC Use of this manual should be strictly supervised to diea avoid disclosure of confidential information 7
40. 0 Mar 2005 1 3 3 Sort staple Paper Type Paper Size Weight Tray Capacity Exit Tray No of Sheets to be Stapled Plain Paper B5R B5 to Normal A4R 4 Normal Mode 1 i 8 5x11R 8 5x14 or Thick Paper 8 5 x T1R Mode aremaller larger Tstpaper A4R 4 8 5 x 11 60 to 90 No of exit tray 8 5x 8 5x14 to gm2 Sheeis 1000 500 OL 11x17 16 to 24 Ib Height 150 mm 75 mm smarter No of Sets 30 30 21050 21025 Cover Mode Controlled by whichever 60 to 209 reached earlier g m 16 to 55 5 Ib The number of Sheets to be Stapled is limited for high density images Color Wise 20 sheets x 20 sets Tray Capacity 10 sets No of Sheets to be Stapled 6 to 15 sheets 20 sets No of Sheets to be Stapled 2 to 5 sheets Exit Tray 2nd paper exit tray No of Sheets to be Stapled Black copy 2 to 15 sheets Max 60 pages Other copy 2 to 10 sheets Max 40 pages 1 3 4 Center Staple amp Fold Paper Type Paper Size Weight Plain Paper A4R B4 60 to 90 8 5 x 11R g m 11x17 16 to 24 Ib 1 4 Stapling Staple Filling Mode Dedicated Staple Cartridge Mode 5000 staples Staple Detection Available Nearly Empty 40 remaining staples Stapling Position Rear Parallel 1 point B5R B5 to Front Parallel 1 point Side Parallel 2 points Center Parallel 2 points 8 5 11R 8 5x 11 to 11 x 17 Manual Staple
41. 0 Mar 2005 The following detail the image processing operations performed by MFP Control Board on the Write Section 106 1 11 Each image area whether it is a color edge area black edge area dot area or a continuous gradation area is discriminated to optimize edge emphasis and smoothing just right for the image The color component data are converted to the Y C M and K density data Also the masking processing which compensates for the deviation in the spectral reflec tion characteristics of the toner and UCR BP processing are performed on the image data Other types of processing performed are the improved reproduction of black text edge emphasis edge expansion smoothing color balance and gamma correc tion In Photo mode the image is processed as multi valued data 8 bit data In any mode other than Photo the error diffusion method is employed to process the image as binary 1 bit data Each of Y M C and K image data is compressed to reduce data volume only in the Photo mode Temporarily stores the GBTC compressed image data The stored image data is compressed in the JBIG Joint Bi level Image experts Group format Stores the compressed image data The image data read from the file memory is uncompressed through a method in a reverse way of JBIG compression Spreads out the image data stored in the file memory to the frame memory and performs the following control functions delaying outputs t
42. 0 deleted When page revised in Ver 2 0 has not been changed in Ver 3 0 The revision marks for Ver 2 0 are left as they are 2005 03 1 0 Issue of the first edition Date Service manual Ver Revision mark Descriptions of revision Theory of Operation Ver 1 0 Mar 2005 CONTENTS Outline a 9 1 1 TPAD ORLY DG ERES 1 1 9 Machine specifications cerner nr 1 1 4 Operating 1 2 Paper Feed path Composition Operation 3 COMPOSIIOMN P 3 4 Drive SYSIOM M 4 5 ecu Ie UTERE 5 5 41 Paper Feed Section rte etes e ite aaro RAE RE RE 5 5 1 1 Vertical transport drive mechanism 5 G e S 9 G 7 fe 9 5 1 2 Paper lifting MOOM tnter e 6 5 2 Cassette Section erret n 7 5 2 1 Paper size detection oer terere tee eed s 7 5 2 2 Paper level indicator mechanism essen 8 Theory of Operation Ver 1 0 Mar 2005 PC 102 PC 202 G g Q e G 7 fe oO Blank Page Theory of Operation Ver 1 0 Mar 2005 1 Product specifications Outline S 1 Product specifications 11 Type E
43. 1 2 inches 140 x 182 mm 5 1 2 x 8 1 2 inches 90 x 139 7 mm 3 1 2 x 5 1 2 inches 1 Image is not guaranteed when thick paper 3 is used Optional Paper Feed Cabinet Only the plain paper and thick paper 1 to 3 weighing 60 to 90 g m 16 to 24 Ib is reliably fed Automatic Duplex Unit 2 4 90 g m 17 to 24 Ib is reliably fed Maintenance Only the plain paper and thick paper 1 to 3 weighing 64 to Machine Durability 1000 000 prints or 5 years whichever is earlier 2 5 Machine Specifications Power Requirements Voltage AC 110 V 120 V 127 V 220 240 V Frequency 50 60 Hz 3 0 Hz Max Power Consumption Less than 1500 W 120 V 12 A 220 240 V 8 A Dimensions 706 W x 765 D x 908 H mm 27 3 4 W x 30 D x 35 3 4 H inches Space Requirements 1014 W x 765 D mm 2 40 W x 30 D inches 2 Mass Approx 125 kg 275 1 2 Ib without IU 2 The indicated spaced requirements represent the space required to fully extend the bypass tray Theory of Operation Ver 1 0 Mar 2005 2 Product specifications 2 6 Operating Environment Temperature 10 to 30 C 50 to 86 F with a fluctuation of 10 C 18 F or less per hour Humidity 15 to 85 with a fluctuation of 20 h 2 7 Built in Controllers Type Built in type controller CPU PPC750 FX 600 MHz Printer Driver PCL5e c Emulation PCL6 XL 2 1 E
44. 16 1 ICOMPOSINOM d cii n arce P erar ere o hear rei eee epa hat 66 16 1 1 Tray1 66 62 67 62 68 16 2 Trayi rrt 68 ID MEI E 68 16 3 m 69 16 3 1 Paper Take up control Tray1 sese 69 16 3 2 Tray1 double feed control es 69 16 3 3 Deceleration control sese nnns 69 16 3 4 Paper supply level detection 70 16 3 5 Paper Near Empty Paper Empty detection 70 16 3 6 Tray1 paper type setting z1 16 3 7 Paper size detection control 72 16 3 8 Tray2 paper lifting motion control 16 3 9 Deceleration 76 Ws Bypass SBCHO l 77 17 4 Composition rnnt rerit n enin 77 172 o 78 17 3 Operation eren rer reir eni E Pie arr 79 17 3 1 Bypass Paper Take up control 17 3 2 Paper Empty detection 2 79 17 3 3 Bypass Paper Lifting Motion Control 17 3 4 en eh hr ht rede 81 lii bizhub C450 G e ni G 7 fe E 9 Theory of Operation Ver 1 0 Mar 2005 18 Conveyance section
45. 170 mm H x 560 mm D 3 75 inch W x 6 75 inch H x 22 inch D Weight 2 6 kg 5 75 Ib Dimensions 1 4 Operating environment Conforms to the operating environment of the main unit NOTE These specifications are subject to change without notice 2 Paper Feed Path Theory of Operation Ver 1 0 Mar 2005 2 Paper Feed Path Transportation in PK Transportation in FS Transportation from Main Body Mm Y a E F ze a B P x a 4614t1c001aa Theory of Operation Ver 1 0 Mar 2005 3 Composition Composition Operation 3 Composition Punch section PK 501 PK 4 PK 131 461412 001 n 7 St 9 9 et s 9 4 Drive Punch Motor M1P PK 4614M607AA Side Registration Motor M2P PK PK 501 PK 4 PK 131 i G g S Q e G 7 fe 5 Operations Theory of Operation Ver 1 0 Mar 2005 5 Operations 5 1 Punching operation 5 1 1 4 holes punch The Punch Section consists of the Dyes Section and the Punch Blade Section The Punch which is attached to the Off Center Cam of the Punch Axis is driven by the Punch Motor and creates the punching operation with a reciprocating movement con verted from the rotation movement of the Punch Axis The Punching operation for the first shee
46. 2 4 ASS a 9 0 7 ers gt 8 3 Ss 4853M027AD CD 4853M029AH 2 2 The sheets of paper for the first print The first and second sheets of paper E are transported via the upper paper of the second print set are transported 5 path onto the Finisher Tray together one on top of the other X a9 9 9 Qu 2 e 2 8 8 8 No 8 9 SS Ong 4853 OW The Exit Rolls are pressed against the The first sheet of paper of the second Exit Roller to feed the sheets of paper print set is transported via the lower of the first print set out At the same paper path time the first and second sheets of paper of the second print set are transported toward the exit A LAM 8 o 88 Ss 4853M028AG SS 4853M032AE The first sheet of paper of the second print set undergoes the switchback sequence and stops The second sheet of paper stops as soon as its trailing edge leaves the Entrance Roller When the first print set is fed out the Exit Roller starts turning backward to transport the first and second sheets of paper of the second print set to the Finisher Tray The Exit Rolls leave the Exit Roller 13 5 Operations Theory of Operation Ver 1 0 Mar 2005 5 2 3 Roller rolls spacing mechanism A Storage roller rolls spacing mechanism The Storage Roller briefly stops when the first shee
47. 2005 5 3 5 Staple unit moving control The Staple Unit is moved with the Slide Motor and its home position is detected with the Slide Home Position Sensor Regardless of the staple mode or paper size the staple unit always returns to the stand by position on the rear side FS 603 For the Corner stapling Front Position The Staple Unit stands by on the rear side and then move to the staple position corre sponding to the paper size at each stapling operation When the Corner stapling Rear Position is used The Staple Unit is at the home position on the rear side The staple position is the same as standby home position The staple position of 2 point stapling at the rear side is used only for B5R Corner Stapling Front Corner Stapling Rear Staple Unit Staple Unit Standby Point Standby Point Stapling Point Entrance E Entrance CN m Tr stopper T stopper HTT Stapling Point 11 i G g S Q e G 7 fe 4583M622AA 4583M623AA For 2 point side stapling Operation The Staple Unit stays at the home or the rear side and then moves to the stapling position at each of stapling operation The order of stapling is first the rear side and then the front side 2 Point Side Stapling Staple Unit Standby Position Stapl
48. 5 x 11 8 5 x 11R 8 5 x 14 11x 17 Manual Staple None 1 For 1 point stapling adjust it in parallel or diagonal according to the length in CD direc tion Parallel CD direction 182 to 216 mm 7 25 x 8 5 Diagonal CD direction 216 to 297 mm 8 5 x 11 75 Theory of Operation Ver 1 0 Mar 2005 1 Product specification 1 5 Sort and staple capacity Reference Actual value Determined by number of Sets or number of Sheets based on number of bindings e CD LL A Number of stacked paper No of Sheets to be Stapled No of Sets No of Sheets 2 pages 100 sets 200 Sheets 3 to 5 pages 80 sets 400 Sheets 6to 10 pages 60 sets 600 Sheets 11 to 20 pages 40 sets 800 Sheets 21 to 30 pages 60 sets 1800 Sheets 31 to 40 pages 60 sets 2400 Sheets 41 to 50 pages 60 sets 3000 Sheets 16 Hole Punch of Holes Metric 4holes Inch 2holes 3holes Punch dust full detection 1 7 Machine specifications DC 24 V supplied from the main unit Power Requirements DC 5 V generated by Finisher Power 63 W or less Consumption Dimensions 538 mm W x 978 mm H x 637 mm D 21 25 inch W x 38 5 inch H x 25 inch D Weight 39 2 kg 86 5 Ib 1 8 Operating environment Conforms to the operating environment of the main unit NOTE These specifications are subject to change without notice E e iL 2 2 1 2 Paper Feed
49. A Retracted AN n 2 Position e 5 Cam Position B Monochrome VW QHO d Cam Position C Color Mode 1 l ON Retraction Roller Transfer Belt 1st Image Lifting Mylar Transfer Roller PC Drum doen 49 14 Transfer Corona section Theory of Operation Ver 1 0 Mar 2005 C Retraction mechanism Atthe same time that the pressure position is changed the Retraction Roller moves up and down to change the position of the image transfer on the surface of the Transfer Belt to suit the specific mode either monochrome or color Like the pressure position changing mechanism the position at which the pressure cam is stopped is changed to move the Retraction Lever which results in the Retraction Roller being moved up and down bizhub C450 Retracted Position Retraction Roller Cam Position 7 4036ma2162c0 Driven Roller Retraction Lever Monochrome Mode Color Mode 4036ma2165c0 4036ma2166c0 i G g S Q e G 7 fe oO D Backup mechanism Since the Retraction Roller changes the belt path so that the Transfer Belt does not touch the PC Drum Y M C in the monochrome mode the nip width between the Transfer Belt and PC Drum K at the 1st Image Transfer Roller K will become smaller thus resulting in possible void images To prevent this fro
50. Control is carried out for the Glossy Mode bizhub C450 Maximum waiting time 60 seconds OHP tandby 1 2and3 4037T2C580AA 20 3 8 WAIT control under low temperature environment G e ni G 7 fe E 9 n case of monochrome print system speed 215 mm s the pressure roller temperature is maintained by delaying the feeding timing of the 1st paper for a set time to secure the intended level of fusing performance Low temperature environment 18 C or less Delayed time of paper feeding timing 6 sec 97 21 Paper exit section Theory of Operation Ver 1 0 Mar 2005 21 Paper exit section 21 1 Composition bizhub C450 Paper Exit Roller 2 4037T2C546AA 4037T2C562AA Charge Neutralizing Brush p R Paper Exit Roller 1 9 ej o9 5 ay 7 e o9 Paper Exit Roller 2 Exit Sensor PC30 4037T2C547AA 98 Theory of Operation Ver 1 0 Mar 2005 21 Paper exit section 21 2 Drive Switchback Motor M1 DU bizhub C450 4037T2C548AA G e G 7 9 99 bizhub C450 i G g S Q e G 7 fe 22 Image stabilization control Theory of Operation Ver 1 0 Mar 2005 22 Image
51. FN Bundle of Paper Upper Folding Roller Lower Folding Roller 27 FS 603 Composition Operation 5 Operation Theory of Operation Ver 1 0 Mar 2005 5 4 4 Paper folding start position Paper folding is created by the Paper Folding Plate and the Paper Pressure Plate At the same time when the Folding Rollers start to rotate the Paper Pressure Plate starts pressing the stack of paper to the contact area of the Paper Folding Rollers For half of the Folding Rollers no rubber material is used except at the center and both ends of the Folding Rollers This half of the Upper and the Lower Folding Rollers con tacts each other at the center and both ends and is only used to transport the paper thus preventing wrinkles The other half of the Upper and the Lower Folding Rollers contacts each other com pletely thereby folding and then transporting the paper FS 603 Upper Folding Roller Bundle of Paper Paper Pressure Plate Take up Entrance Paper Folding Transport Paper Transport s 2 S S Q s s 9 A 4583M633AA Lower Folding Roller Paper Pressure Plate Home Position Paper Pressure Plate Start Position 4583M637AA 4583M636AA The plate doesn t touch paper The plate pushes paper 28 KONICA MINOLTA SERVICE MANUAL PK 501 PK 4 PK 131 2005 03 KONICA
52. Image Transfer Roller 1st Image Transfer Roller ej Y Y g Transfer Belt Transfer Belt Output a constant current to the 1st Image Transfer Roller Y Y Transfer Belt Drive Roller PC Drum Ground e S 5 Y Measure the resistance value of the 1st Image Transfer Roller Y Determine the 1st image transfer output voltage 2nd Image Transfer Current Feedback Terminal 4037T2c574aA B 1st image transfer ATVC operation 1 The 1st image transfer constant current for each color of toner output from the DC power Supply 1 is fed back to the DC power Supply 1 via the 1st Image Transfer Roller Transfer Belt and PC Drum ground This allows the resistance of the Trans fer Belt to be measured common is set for Y M and C 2 The measured resistance is used as the basis for determining the optimum 1st image transfer voltage for each color of toner C 2nd image transfer ATVC operation 1 The 2nd image transfer constant current output from the DC power Supply 1 is fed back to the DC power Supply 1 via the 2nd Image Transfer Roller Transfer Belt and Transfer Belt Drive Roller This allows the resistance of the Transfer Belt to be measured 2 The measured resistance together with the type of paper temperature and humid ity and the color or monochrome mode 1st side 2nd side is used as the basis for determining the optimum 2nd image transfer voltage 53
53. Need to replace Imaging Unit Call your Technical Representative Imaging Unit Yellow 4037T2E599AA 4037T2E600AA The warning screen and IU replacement screen change when the settings are changed for Display PM Parts Lifetime and Unit Change available from the Tech Rep mode and IU Life Stop Setting available from the Security mode 25 bizhub C450 s 5 S Q s 5 s 9 10 Photo Conductor section Theory of Operation Ver 1 0 Mar 2005 10 Photo Conductor section 10 1 Composition Charge Generating Layer CGL Charge Transport Layer CTL Aluminum Wes 4036ma2338c0 4037T2C509AA Key Name Function System 1 PC Drum Y M C K Forms an image of each of different colors OPC drum 630 mm 10 2 Drive K PC Motor M7 7 Be gt 4 PC Drum C PC Drum M PC Drum K T PC Drum Y 4037T2C510AA 26 Theory of Operation Ver 1 0 Mar 2005 10 Photo Conductor section 10 3 Operation 10 3 1 PC Drum Drive mechanism Two independent PC Drum motors are used for the drive mechanism to suppress incor rect color registration and uneven pitch The Color PC Drum Motor drives the PC Drums Y M and C while the K PC Motor drives the PC Drum K bizhub C450 Gears having a large diameter are used to enhance rotating accuracy of th
54. Operations Theory of Operation Ver 1 0 Mar 2005 5 2 2 Paper level indicator mechanism All drawers now use the universal paper size tray for greater functionality There is a window in the front cover of the drawer that serves as the Paper Level Indica tor showing the amount of paper that is still available for use A red lever is attached to the paper lifting plate of the drawer and as the paper lifting plate raises the red lever becomes visible in the window The more the red lever is visible the lesser the amount of paper will be available for use 4848M608AA 4348M609AA Cassette bottom plate Lever paper lifting plate 4348M610AA 4348M611AA Operated by the paper lifting plate of the drawer Paper Level Indicator on the front cover of the drawer SS IKONICA MINOLTA SERVICE MANUAL PC 402 2005 03 KONICA MINOLTA BUSINESS TECHNOLOGIES INC Ver 1 0 After publication of this service manual the parts and mechanism may be subject to change for improvement of their performance Therefore the descriptions given in this service manual may not coincide with the actual machine When any change has been made to the descriptions in the service manual a revised version will be issued with a revision mark added as required Revision mark To indicate clearly a section revised show to the left of the revised section A number within represents the number of times
55. Original Tilted with 2 or less is 80 1 7 Machine specifications Power Requirements DC24V supplied from the main unit DC5V generated within the Automatic Document Feeder Power 60 W or less Consumption Dimensions 586 mm W x 519 mm D x 135 mm H 23 inch W x 20 5 inch D x 5 25 inch H Weight 14 2 kg 31 25 Ib 1 8 Operating environment Conforms to the operating environment of the main unit NOTE These specifications are subject to change without notice 2 Paper Feed Path Theory of Operation Ver 1 0 Mar 2005 2 Paper Feed Path 2 1 1 Sided Mode Document Feeder E 4582t1c002aa 1 Document feed 1st side scanned 2 Conveyance Reverse 3 Document exit 2 2 2 Sided Mode 4582t1c003aa 1 Document feed 1st side scanned 2 Conveyance Reverse 2nd side scanned 3 Document exit Theory of Operation Ver 1 0 Mar 2005 3 Composition Composition Operation 3 Composition Switchback section Document Feeder Automatic Document feed section Document exit section 4582t1c001aa Conveyance section Reverse section G e n 9 G 7 fe 9 4 Drive Theory of Operation Ver 1 0 Mar 2005 4 Drive Exit Motor M3 DF Transport Motor M2 DF Document Feeder Automatic
56. Registration Clutch CL1 DF Take Up Motor M1 DF 4582M601AA s amp S Q s E G iS Exit Gate drives by SL2 DF Exit Switch Gate drives by spring Turnover Gate drives by SL1 DF a lt N RSS AA LA 24 458212 002 Exit Solenoid SL2 DF Turnover Solenoid SL1 DF Theory of Operation Ver 1 0 Mar 2005 5 Operation 5 Operation 5 1 Document pick up mechanism The Document Pick Up Section consists of the Document Stoppers Pick Up Rollers Take Up Roller and Separation Roller and this section is driven by the Take Up Motor The Pick Up Rollers stay at their upper position during the standby state and are lowered when taking up an original The Document Stoppers stay at their lower position during the standby state and retract to their upper position when taking up an original The originals are separated and only one sheet is taken up by the Take Up and Separation Rollers Atorque limiter is installed to the Separation Roller to provide the separating operation Document Feeder Automatic Pick Up Rollers Empty Sensor PC4 DF Stopper d i G e S G 7 fe E 9 Take Up Motor M1 DF Take Up Roller 4582M002AA Separation Roller Document Stopper 5 Operation Theory of Operation Ver 1 0 Mar 2005 5 2 Document take up tr
57. Side Registration Motor M2P PK le Punch Slide Unit 5 Photo Sensor Board PWB C PK 9 LED Board PWB D PK e v 5 i 5 o 6 o Ole Trailing Edge hs q Detection Sensor g Paper Exit Paper 4614M604AA Side Registration Sensor 3 Side Registration Sensor 2 Side Registration Sensor 4 Trailing Edge Detection Sensor Side Registration Sensor 1 LED Board 4614M608AA Theory of Operation Ver 1 0 Mar 2005 5 Operations B Operation 2 1 Side Registration Sensor detects paper edge at rear side 2 Side Registration Motor moves Punch Slide Unit at the specified position 3 Punch Slide Unit stops NIE x a E X a e m x at Side Registration Sensor 1 Rear side Side Registration Sensor 2 Side Registration Sensor 3 Side Registration Sensor 4 Leading edge Trailing edge 5 Q 9 fe 4614M605AA 5 Name Function Side Registration Sensor 1 Detects paper edge A3 A4 8 5x11 11x17 Side Registration Sensor 2 Detects paper edge B4 B5 Side Registration Sensor 3 Detects paper edge A4R 8 5x11R 11x14 Side Registration Sensor 4 Detects paper edge B5R PK 501 PK 4 PK 131 i G g S Q e G 7 fe 5 Operations Theory of Operation Ver 1 0 Mar 2005 C Operation 3 1
58. Take up Roller gradually lowers to unblock the Tray2 Lift up Sensor The Tray2 Lift up Motor is then energized again to lift the paper stack When the Tray2 Lift up Sensor is then blocked the Tray2 Lift up Motor is deenergized The sequence of these operations is repeated to keep constant the pressure between the Paper Take up Roller and paper stack paper take up pressure regardless of the amount of paper still available for use Tray2 Lift up Sensor PC105 4036ma2233c0 4036ma2232c0 75 bizhub C450 i G g S Q e G 7 fe 16 Paper feed section Theory of Operation Ver 1 0 Mar 2005 16 3 9 Deceleration Control When paper is fed from Tray2 Tray3 Tray4 LCC or Bypass the corresponding Trans 76 port Motor is controlled so that the period of time that begins when the paper take up sequence is started and ends when the leading edge of the paper reaches the Registra tion Roller becomes a predetermined value The control thereby prevents a paper mis feed from occurring and ensures productivity The deceleration control is provided based on the information on the period of time that begins when the corresponding Paper Feed Motor is energized or FEED signal is turned ON and ends when the corresponding Vertical Transport Sensor is activated With the addition of this control double feed control at the time of paper feed from Tray2 Tray3 Tray4 LCC and Bypass
59. a Name 2 way Paper Take Up Cabinet Type Front loading type 2 way paper take up device Installation Desk type Center Document Alignment 1 2 Paper type Paper Type Plain paper 56 to 256 g m 15 to 68 Ib Recycled paper 60 to 90 g m 16 to 24 Ib Paper Size to 5 5 x 8 5R to 11 x 17 Capacity 3rd Drawer 500 sheets 80 g m 21 25 Ib 4th Drawer 500 sheets 80 g m 21 25 Ib 1 3 Machine specifications Power Requirements DC 24 V 10 supplied from the main unit DC5V 5 Max Power 75 W or less Consumption Dimensions 570 mm W x 263 mm H x 548 mm D 22 5 inch W x 10 25 inch H x 21 5 inch D Weight PC 102 22 0 kg 48 5 Ib PC 202 25 9 kg 57 Ib 1 4 Operating environment Conforms to the operating environment of the main unit NOTE These specifications are subject to change without notice 2 Paper Feed path Theory of Operation Ver 1 0 Mar 2005 2 Paper Feed path Paper feed from the 3rd tray e 2 A o m O Transportation to main body Main body PC 102 202 transportation in PC Only PC 202 Paper feed from the 4th tray 4061t1c001aa Theory of Operation Ver 1 0 Mar 2005 3 Composition Composition Operation 3 Composition PC 102 PC 202 Cassette Section Paper Feed Section PC 102 202 Only PC 202 4061t2c001aa
60. against the surface of the Transfer Belt Drive of the Cleaning Brush Motor is transmitted to the Belt Refresh Pad and a cleaning sequence is carried out bizhub C450 Cleaning Pd M22 Belt Refresh Pad s S Q 9 s et s 9 4037T2C591AA 57 bizhub C450 i G g S Q e 2 fe oO 14 Transfer Corona section Theory of Operation Ver 1 0 Mar 2005 14 3 8 2nd Image Transfer Roller cleaning To remove residual toner off the surface of the 2nd Image Transfer Roller a DC bias is applied alternately to the roller thereby moving the residual toner to the surface of the Transfer Belt The Cleaning Brush then scrapes off the toner on the surface of the Transfer Belt HV1 Transfer Belt 2nd Image Cleaning Brush Transfer Roller 4036ma2175c0 Operation timing The sequence is carried when the Main Power Switch and the Auxiliary Power Button are turned ON or the cover is opened and closed when a print cycle has been abnormally terminated due to misfeed or malfunction The sequence is also carried out at the end of a print cycle that is run after the cumula tive number of printed pages produced has exceeded 100 or during a print cycle that is run after the cumulative number of printed pages produced has exceeded 120 since the previous cleaning operation At this time the
61. bee irr eras Genoa roter itid 3 1 7 Machine specifications terreri o ml t dr erase D kk ee xoc Ran 3 1 8 Operating 3 2 PaperFeed Path aiet 4 21 Output the 1st paper exit 4 2 2 Output the 2nd paper exit tray 4 4 Composition Operation 3 COMPOSIIOM m 5 4 6 5 Operation S EUER 8 5 1 Horizontal transport unit 5 1 1 Paper transport 8 5 2 Papettranspott erra rne tia FH Rr SCR RE d t 9 5 2 1 Paper transport mechanismn 9 5 2 2 Paper switchback mechanism nnne 13 5 2 3 Roller rolls spacing mechanism pp 14 bid iFiniShetdttay 15 5 3 1 Paper aligning mechanism nennen 16 5 4 Staplingscisomspin ecco ente ced ida RC E COE EUR DD CREE ERE EE HE ERR E 18 5 4 1 Stapling mechanism 2 irn erret er nien 18 5 4 2 Staple unit moving mechanism pe 19 5 4 3 Staple sheet empty detection seen 20 5 5 2nd paper exit tray einen a RR a 21 5 5 1 2nd paper exit tray ascent descent 21 5 5 2 2nd paper exit tray shifting mechanism eene 22 FS 507 G e G 7 fe E 5 T
62. bizhub C450 TCR Bias TCR Window 4036ma2509c0 9 ej o9 5 7 o9 e 38 Theory of Operation Ver 1 0 Mar 2005 13 Toner Supply section 13 Toner Supply section 13 1 Composition Cartridge M Cartridge K bizhub C450 Cartridge Y Cartridge C 4037T2C553AA Toner Set Sensor C 4037T2C516AA Toner Set Sensor K Toner Set Sensor M Toner Set Sensor Y s e n 7 St 9 G et s 9 Toner Supply Motor Y M M4 Toner Supply Motor C K M3 408 DCRITAR Toner Near Empty Sensor PQ Y M C K PC15 PC16 PC17 PC18 Agitating Blade Y M C K g Toner Near Empty Sensor LED Y M C K PC21 22 23 24 Nf EIN SS AH Ly E Metering Roller Y M C K 4037T2C518AA 39 13 Toner Supply section Theory of Operation Ver 1 0 Mar 2005 13 2 Drive Toner Supply Motor C K M3 bizhub C450 Toner Supply Motor Y M M4 4037T2C519AA Toner Near Empty Sensor PQ Y M C K PC15 PC16 PC17 PC18 Agitating Blade Y M C K Toner Near Empty Sensor LED Y M C K PC21 PC22 PC23 PC24 s 5 S Q s s 9 Metering Roller Y M C K 4037T2C518AA
63. cumulative number of printed pages counts up 1 for 216 mm or less of printed paper FD length and 2 for more than 216 mm of printed paper FD length After the end of Transfer Belt Cleaning 1st Image Transfer Pressure Retraction Motor M11 Retracted 2nd Image Transfer Reverse Bias 2nd Image Transfer Pressure Retraction Motor M13 4036ma2178c0 58 Theory of Operation Ver 1 0 Mar 2005 14 Transfer Corona section 14 3 9 Charge neutralization and separation of paper To neutralize any charge potential left in the paper which has undergone the 2nd image transfer stage a Charge Neutralizing Cloth is installed to the guide plate after the 2nd Image Transfer Roller The output of the Charge Neutralizing Cloth is switched automatically using the High Voltage Unit 1 according to the paper type and the environmental conditions and whether the print cycle is for printing the 1st side or 2nd Also provided are the three Transfer Belt Paper Separator Claws that properly separate paper after the 2nd image transfer stage from the Transfer Belt bizhub C450 Paper Separator Claws Charge Neutralizing Cloth NEN HV1 Transfer Belt 2nd Image Transfer Roller 4 2176 0 4036ma2546c0 Switching of output of the Charge Neutralizing Cloth Paper Type Ambience Control Detailed Description i G e G 7 fe
64. detects when paper in the drawer runs out Polyethylene Sheet Tray Upper Limit Sensor PC4 LCT Lever Pick up Roller Polyethylene Sheet s St 9 s et s 9 348M627AA Feed Roller Separation Roller Upper Paper Empty Sensor PC3 LCT Actuator d i Pick up Roller Home Position 4348M602AA Pick up Roller Feed Position 4348M603AA 5 Operations Theory of Operation Ver 1 0 Mar 2005 5 2 Tray Section 5 2 1 Elevator tray mechanism The Main Tray is suspended by the cables at the front and rear Asthe Elevator Motor turns forward or backward the cables are wound to raise or lower the tray The Tray Lower Position Sensor detects the tray at its lower limit position PC 402 4348M614AA 4348M621AA Tray Lower Position Sensor PC13 LCT Sg 5 S Q 2 E s 9 Elevator Motor M5 LCT Sub Tray Main Tray M S e Theory of Operation Ver 1 0 Mar 2005 5 Operations 5 2 2 Shift Gate drive mechanism e f the Main Tray runs out of paper while the Sub Tray is loaded with paper the paper stack on the Sub Tray is moved to the Main Tray Atthis time the Shift Gate Motor is energized to retract the front and rear Shift Gates PC 402 Shift Gate Motor M3 LCT Shift Gate move to outside Shifter 4061t2c103aa Shift Gate move
65. interior 8 temperature is at the threshold value or less 190 19 OHP when the absolute humidity or the machine interior 9 temperature exceeds the threshold value 199 The temperature threshold value of OHP is absolute humidity 18 g m3 The machine interior temperature threshold value of OHP is 16 C C In standby The fusing temperature in the standby state is prevented from being dropped Heating roller Pressure roller Standby state g temperature temperature C C When the pressure roller temperature is over 60 C at the start up 195 145 of warm up The pressure roller tempera ture is less than 145 during 200 145 When the pressure roller tem warm up perature is 60 C or less at the start up of warm up The pressure roller tempera ture is between 145 C and 165 195 155 during warm up Machine interior humidity 70 or higher high humidity 195 155 D Power Save Temperature control is provided with a decreased fusing temperature so that power con sumption in the standby state can be minimized Mode Heating Roller Set Temperature Pressure Roller Set Temperature Power Save 165 155 94 Theory of Operation Ver 1 0 Mar 2005 20 Fusing section 20 3 4 Protection against abnormal conditions The machine provides protection against abnormally high temperature of the Fusing Unit in the following three steps
66. oa Main Scanning Direction 4036ma2602c0 2 Europe China Central America 220 240V Areas North America Only Countries other than the above mentioned are standard settings i G g S Q e G 7 fe oO 14 Theory of Operation Ver 1 0 Mar 2005 7 Scanner section IR section 7 2 Drive Scanner Motor Exposure Unit bizhub C450 Scanner Drive Cable R gt Scanner Drive Cable F Mirror Unit 079 4037T2C503AA 7 3 Operation G e G 7 fe E 9 7 3 1 Scan and Exposure Lamp control A When the Power Switch is turned ON 1 The Exposure Unit moves in the return direction until the Scanner Home Sensor is activated It does not move if the Scanner Home Sensor is already activated 2 The Exposure Unit moves in the scan direction and stops at a position under the shading correction sheet 3 The gain value of the CCD Sensor output voltage is adjusted for R G and B A shading correction is made 5 After the adjustment has been made the Exposure Unit moves in the return direc tion and stops at the Scanner Home Sensor This position serves as the home position The same operation is performed for the auto and manual exposure control Home Position Y Gain Adjustment and Shading Correcti
67. of Original Possible Trouble 5 Sheets stapled or clipped together Take up failure damaged sheet defective drive E 8 mechanism due to jammed staples or clips Sheets glued together Take up failure damaged sheet Sheets of 211 g m 56 25 Ib or more Take up failure Sheets misfed Sheets of 110 g m 29 25 Ib or more in 2 Sided Take up failure Sheets misfed Mode Sheets folded torn or wrinkled Take up failure damaged sheet Sheets severely curled Sheets misfed due to being dog eared or fed in askew OHP Film Transparency Film Take up failure Sheets misfed Label Paper Take up failure Sheets misfed Offset Master Paper Take up failure Sheets misfed Sheets clipped or notched Damaged sheet Sheets misfed Sheets patched Patched part folded or torn sheet Sheets misfed 1 5 Paper feed not guaranteed originals e f fed paper feed will be possible to some extent but trouble occurrence will be possible Type of Original Possible Trouble Sheets lightly curled Curled amount 10 15 mm Dog eared exit failure Heat Sensitive Paper Edge folded exit failure transport failure Ink Jet Paper Take up failure transport failure Sheets with smooth surface Coated Paper Take up failure transport failure Intermediate paper Take up failure transport failure Paper immediately after paper exit from the main unit Take up failure transport failure Paper with many punched holes e g loose leaf limited to vertic
68. of rotation of the Paper Exit Roller is reversed and the first 1 sided print is transported toward and into the Duplex Unit Atthe same time the second sheet of paper is taken up and fed into the main unit 4657M516AA Operation 3 The main unit carries out the first print cycle for the second sheet of paper to produce the print image of the fourth page of the original Atthe same time the first 1 sided print is transported through the Duplex Unit i G g S Q e G 7 fe Operation 4 The main unit produces the print image of the first page of the original on the first 1 sided print that has been fed through the Duplex Unit Atthe same time the second sheet of paper is subjected to a switchback sequence at the exit section and fed into the Duplex Unit Atthe same time the third sheet of paper is taken up and fed into the main unit 4535M504AA Theory of Operation Ver 1 0 Mar 2005 5 Operation Operation 5 While feeding the first 2 sided print out main unit produces the print image of the 6th page of the original on the third sheet of paper The second sheet of paper will wait in front of the Duplex Unit Transport Roller 3 until the third sheet of paper has been operated switch back sequence E x 0 a ie E B8 4535M
69. sole noid and planetary gears When the Fusing Paper Loop Control solenoid is deener gized the planetary gears rotate which sets lower speed When the solenoid is energized the planetary gears stop and the higher speed is selected Fusing Drive Motor M2 s 7 Q 9 s et s 9 Planetary gear Fusing Paper Loop Control Solenoid SL1 4036ma2614c0 89 20 Fusing section Theory of Operation Ver 1 0 Mar 2005 1 The fusing speed in the beginnings is set to the higher speed thereby forming a loop in the paper between the 2nd Image Transfer Roller and the Fusing Roller 2 When the length of the loop becomes small to deactivate the Fusing Paper Loop Sensor the fusing speed is switched to the lower level 3 When the length of the loop becomes large to activate the Fusing Paper Loop Sen Sor the fusing speed is again switched to the higher level 4 The sequence of these operations is repeated so that the fusing speed is automat ically changed in two steps according to the loop length This effectively makes for the difference between the fusing speed and paper transport speed during image transfer bizhub C450 Pressure Roller Detecting Lever Fusing Paper Loop ule Sensor PC4 2nd Image Transfer Roller 4036ma2032c1 i G g S Q e G 7 fe
70. stabilization control 22 1 Overview The machine provides the following image stabilization control to ensure stabilized copy image Purpose Control Control Means To stabilize image density To stabilize gradation IDC intensity control Max density control Registration control color shift correction Gamma correction control IDC Sensor Temperature Humidity Sensor To stabilize toner density TCR control Y M C K TCR Sensor To stabilize image transfer Image transfer output control 1st image transfer ATVC 2nd image transfer ATVC An explanation is given of the control for each section Temperature Humidity Sensor 1st Image Transfer Roller 2nd Image Transfer Roller Toner Supply Motor TCR Sensor Toner Repleni 4 shing Control Registration Developing Bias Grid Voltage Vg Control 4 Image Density To be set on control panel D MAX Density Background Voltage Margin TCR Level Setting AE Adjust ATDC Toner Supply A Gradation Control Sa Gamma Correction Data Gradation Correction Table Yi 1 OUT IN i Temperature Humidity Sensor P E IDC Sensor Transfer ATVC Control
71. to digital conversion 8 3 Shading correction Image Processing Board 4 Line to line variation correction i 5 Zoom movement processing 6 ACS processing 7 Image data editing 8 AE processing VE d To the MFP Control Board i G e m G 7 fe E 9 103 bizhub C450 i G g S Q e G 7 fe oO 23 Image processing Theory of Operation Ver 1 0 Mar 2005 The following detail the image processing operations performed by the Scanner Section 1 A reduction type CCD Sensor is used to read the light reflected off the original and convert the optical data to a corresponding electric signal To make data process ing faster data transfer and output are done through two channels one for even numbered pixels and the other for odd numbered pixels The odd and even analog signals output from the CCD Sensor chips are synthe sized to form a single string of signal data which is in turn converted to 8 bit digital signals 256 gradation levels A correction is made of errors that occur due to variations in sensitivity of each CCD chip and the light distribution varying along the length of the Exposure Lamp The shading correction is made by holding the peak value i e the maximum value of readings taken of multiple lines to prevent
72. to outside 5 2 3 Shifter drive mechanism s ES 7 St 9 s et s 9 Then the Shift Motor is energized to move the Shifter so that the paper stack on the Sub Tray is moved onto the Main Tray The Shifter continues moving and stops when the Shifter Return Position Sensor is acti vated When the Drawer Release button is thereafter pressed the Shifter starts moving and stops as soon as the Shifter Home Position Sensor is activated Shifter Home Position Sensor PC12 LCT Shifter Return Position Sensor PC11 LCT Shifter 4348M622AA 4348M614AA Shift Motor M4 LCT Shift Motor M4 LCT 5 Operations Theory of Operation Ver 1 0 Mar 2005 5 2 4 Paper empty detection Paper empty detection of Main Tray is performed by Paper Empty Board Paper empty detection of Sub Tray is performed by Shift Tray Paper Empty Sensor PC 402 Sub Tray Main Tray 4348M623AA Shift Tray Paper Empty Sensor PC9 LCT Paper Empty Board PWB E LCT i G g S Q e G E fe p IKONICA MINOLTA SERVICE MANUAL FS 507 2005 03 KONICA MINOLTA BUSINESS TECHNOLOGIES INC Ver 1 0 After publication of this service manual the parts and mechanism may be subject to change for improvement of their performance Therefore the descriptions gi
73. 0 Synchronizing Roller Sensor PC28 Exit Sensor PC30 Switchback Motor M1 DU Duplex Unit Transport Motor M2 DU Duplex Unit Transport Sensor 2 PC1 DU OFF Hi Forward Backward Forward Forward ON 1 Rotation Rotation Rotation Rotation i Rotation 4535M509CA p IKONICA MINOLTA SERVICE MANUAL PC 102 PC 202 2005 03 KONICA MINOLTA BUSINESS TECHNOLOGIES INC Ver 1 0 After publication of this service manual the parts and mechanism may be subject to change for improvement of their performance Therefore the descriptions given in this service manual may not coincide with the actual machine When any change has been made to the descriptions in the service manual a revised version will be issued with a revision mark added as required Revision mark To indicate clearly a section revised show to the left of the revised section A number within represents the number of times the revision has been made To indicate clearly a section revised show in the lower outside section of the correspond ing page A number within A represents the number of times the revision has been made NOTE Revision marks shown in a page are restricted only to the latest ones with the old ones deleted When page revised in Ver 2 0 has been changed in Ver 3 0 The revision marks for Ver 3 0 only are shown with those for Ver 2
74. 0 Mar 2005 5 Operation 5 4 2 Transport operation in Center Staple amp Fold section A Paper transport After a stack of paper has been aligned on the Finishing Tray it is taken up with the Upper and Lower Exit Rollers With the rotation of the Upper and Lower Exit Rollers a stack of paper is transported into the Stapling Section FS 603 Upper Exit Roller Bundle of paper p adi Lower Exit Roller 5 A i G e m G 7 fe E 9 4583 626 23 5 603 i G g S Q e G 7 fe 5 Theory of Operation Ver 1 0 Mar 2005 B Stapling The stack of paper is further transported and temporarily stopped when the center area of the paper the area where stapling will be made has reached the position of the sta ples in the Staple Unit Then a stapling operation is cycled at the center area with the Staple Unit Staples Staple Unit Upper Folding Position Sensor PI10 FN Staple Unit Lower 4583M627AA 24 Theory of Operation Ver 1 0 Mar 2005 5 Operation C Booklet Transport Next the stack of paper that was stapled is transported to the paper folding exit position with the Transport Rollers The Paper folding exit position is the position where the cen ter of the paper where stapled is of the same height as that of the Pap
75. 01AA Original Cover Detecting Lever Size Reset Switch 13 5 Operation Theory of Operation Ver 1 0 Mar 2005 Document Feeder Automatic i G g Q e G 7 fe Blank Page 14 IKONICA MINOLTA SERVICE MANUAL THEORY OF OPERATION Automatic Duplex Unit 2005 03 KONICA MINOLTA BUSINESS TECHNOLOGIES INC Ver 1 0 After publication of this service manual the parts and mechanism may be subject to change for improvement of their performance Therefore the descriptions given in this service manual may not coincide with the actual machine When any change has been made to the descriptions in the service manual a revised version will be issued with a revision mark added as required Revision mark To indicate clearly a section revised show to the left of the revised section A number within represents the number of times the revision has been made To indicate clearly a section revised show in the lower outside section of the correspond ing page A number within A represents the number of times the revision has been made NOTE Revision marks shown in a page are restricted only to the latest ones with the old ones deleted When page revised in Ver 2 0 has been changed in Ver 3 0 The revision marks for Ver 3 0 only are shown with those for Ver 2 0 deleted When page revised in Ver 2 0 has not been changed in Ver 3 0 The
76. 14 Transfer Corona section Theory of Operation Ver 1 0 Mar 2005 D 1 and 2nd image transfer ATVC operation timing The 1st and 2nd image transfer ATVC operations are carried out immediately before the execution of image stabilization control The control operation is not however performed in Image Stabilizer Mode 3 The control operation is performed when the threshold value of the change in interior temperature is exceeded bizhub C450 i G g S Q e G 7 fe 54 Theory of Operation Ver 1 0 Mar 2005 14 Transfer Corona section 14 3 6 Transfer Belt cleaning To scrape residual toner off the surface of the Transfer Belt the Transfer Belt is provided with a Cleaning Brush and a Charging Brush The Cleaning Brush is a rotary brush To enhance its ability to scrape residual toner off the surface of the Transfer Belt the brush is turned in a direction opposite to that of the Transfer Belt The Cleaning Brush Motor provides the drive for this system The Charging Brush is located on the upstream side of the Cleaning Brush A bias is applied to the Toner Collecting Roller to let current flow through the Cleaning Brush Transfer Belt and Charging Brush Through potential difference involved toner left on the surface of the Transfer Belt is conveyed to the Toner Collecting Roller bizhub C450 Cleaning Brush Charging Brush Transfer Belt Toner Collecting
77. 17 A3 5 Option S 2 Inch Areas Q 5 Table 1 8 Sensor CCD Width mm FD1 144 7 220 9 221 0 S OFF Invoice R Letter R Letter ON Legal 11x17 Table 2 Sensor CCD Width mm FD1 FD2 143 153 187 213 2209 225 262 2844 284 5 OFF OFF ua 5 BSR LetterR B5 Letter A4 ON OFF FLS FLS FLS OFF ON Legal ON ON Legal B4 11X17 A3 Option 18 Theory of Operation Ver 1 0 Mar 2005 7 Scanner section IR section B Detection Timing When Placed on Original Glass Validates the original length Validates the original size Original Size Sensors FD1 PC203 and FD2 PC204 bizhub C450 Original Cover Angle Sensor PC202 Exposure Lamp FL201 Scanner Motor M201 Size Reset Switch SW201 4037T2E598AA C Detection Timing When the ADF is Used Validates the original size Resets the original size when the ADF is lowered when the ADF is raised g and FD2 PC204 Original Cover Angle Sensor PC202 Size Reset Switch SW201 4037T2C565AA The original size is validated if the Start key is pressed with the ADF in the raised posi tion i G e S G 7 fe E 9 19 8 Write section PH section Theory of Operation Ver 1 0 Mar 2005 8 Write section PH section 8 1 Composition bizhub C450 4037T2C504AA 403
78. 22 Image stabilization control 22 4 Operation flow Theory of Operation Ver 1 0 Mar 2005 Mode 1 Mode 2 Mode 3 Mode 4 Mode 5 Y Y Y Y IDC intensity IDC intensity IDC intensity IDC intensity control control control control Y Max density control 1 Y Y Y Y Max density Max density Max density Max density control 2 control 2 control 2 control 2 Y v M Y v Gamma correction control Gamma correction control v Gamma correction control Gamma correction control Gamma correction control Registration control Registration control Test pattern output 4037T2E607AA The ATVC control is performed simultaneously with the IDC intensity control Max density control 1 A pattern is produced on the Transfer Belt using the Vdc data of four different levels as reference for each color and the adequate Vdc is thereby set Max density control 2 A pattern is produced on the Transfer Belt using the Vdc data of four different levels with reference to the Vdc data used last and the adequate Vdc is thereby set 102 Theory of Operation Ver 1 0 Mar 2005 23 Image processing 23 Image processing 23 1 Scanner section image processing block diagram SA 1 Photoelectric conversion i CCD Sensor Board bizhub C450 2 Analog
79. 28 mm 1 inch 1 4 Machine specifications Power Requirements DC 5 V DC 24 V supplied from Finisher 341 mm W x 149 mm H x 527 mm D Dimensions 13 5 inch W x 5 75 inch H x 20 75 inch D Weight 1 75 kg 3 75 Ib 1 5 Operating environment Conforms to the operating environment of the main unit NOTE These specifications are subject to change without notice 2 Paper Feed Path Theory of Operation Ver 1 0 Mar 2005 2 Paper Feed Path Transportation and rejection paper in JS 601 e Transportation in FS 507 Transportation from main body 4655t1c001aa Theory of Operation Ver 1 0 Mar 2005 3 Composition Composition Operation 3 Composition JS 601 Job Tray Transport Exit section G e g G 7 E 9 4655t1c002aa 5 601 i G g S Q e G 7 fe oO 4 Operation 4 Operation Theory of Operation Ver 1 0 Mar 2005 4 1 Job tray paper transport mechanism The Job Separator Transport Roller and Job Separator Exit Roller turn to transport the paper into the Job Tray as the motor is energized The 1st Tray Entrance Switching Solenoid Upper Lower Entrance Switching Solenoid and 3rd Entrance Switching Solenoid are energized to select the paper path into the Job Tray Gear connecti
80. 3 Offsetting operatlon cinere cr iras cer no rr dnd gerne DO R ERR ER GRE FERE 12 5 2 4 Exiting Operatori DEBA REEF RAE 13 5 2 5 Group Mode Sort MOJE snepi oce redi ie 13 5 2 6 Offset MOJE 14 5 2 7 Staple 14 5 2 8 Center Staple amp Fold 15 5 355 ap 16 5 3 1 Types and positions of staples 16 5 3 2 Staple unit moving mechanism 4 17 FS 603 G e a ie G 7 fe E 9 5 603 G g Q e G 7 fe Theory of Operation Ver 1 0 Mar 2005 5 3 3 Staple pefaltl l 18 5 3 4 Staple Unit coe eh ce eb Etre CO EFT Re DECRE CRUEL 19 5 3 5 Staple unit moving control ee 20 5 3 6 1st Paper Exit Tray mechanism 21 5 4 Center Staple amp Fold Section ee 22 5 4 1 2nd paper Exit Itay iei ettet 22 5 4 2 Transport operation in Center Staple amp Fold section 23 5 4 3 FOIGING mechanism east 5 4 4 Paper folding start position Theory of Operation Ver 1 0 Mar 2005 Outline 1 Product specification 1 31 Type 1 Product specification Type Multi Staple Finisher with Saddle Booklet Installation Frees
81. 4 Drive 4 4 Switchback Drive Switchback Motor M1 DU Automatic Duplex Unit Paper Exit Roller Main Unit 4535tm2c001aa 4 2 Transport Drive i G g S Q e G 7 fe o E oO Duplex Unit Transport Roller 1 Duplex Unit Transport Roller 2 Duplex Control Board PWB A DU 4535M004AA Duplex Unit Transport Motor M2 DU Theory of Operation Ver 1 0 Mar 2005 5 Operation 5 Operation 5 1 Switchback mechanism 5 1 1 Switchback operation The Paper Exit Roller of the main unit is used to subject the 1 sided print to a switchback sequence so that the 1 sided print is to be transported through the Duplex Unit Feeding the Paper into Duplex Unit Paper Exit Roller Exit Sensor PC30 4535M003AA 5 1 2 Paper exit roller drive coupling mechanism When the Duplex Unit is mounted the tip of the Duplex Unit Lever raises the Idle Lever to cut off the drive from the main unit Fusing Rollers and the Paper Exit Roller is driven by the Switchback Motor Switchback Motor M1 DU Idle Lever Duplex Unit Lever 1 OO 0 Paper Exit Roller 4535tm2c002aa 5 1 3 Switchback Motor Control Rotation of the Switchback Motor is controlled by the signals output from the Duplex Control Board Automatic Duplex Unit G e G 7 fe E 9 5 Operation Th
82. 5 x 8 5 242 to 282 inclusive Executive 125 to 155 inclusive 5 5 x 8 5R 169 to less than 201 Executive R ON OFF OFF OFF 201 to 231 inclusive Letter R 225 to less than 288 Letter 288 to 330 inclusive A4 ON ON OFF OFF 188 to 235 inclusive FLS 201 to 231 inclusive Legal 5 ON ON ON OFF 242 to less than 268 B4 E 268 to 288 inclusive 11x14 255 to less than 288 11 17 5 ON ON ON ON 288 to less than 301 8 301 to 330 inclusive Wide E Bypass FD Paper Size Bypass FD Paper Size Sensor 1 PC111 Sensor 2 PC112 Bypass FD Paper Size Sensor 3 PC113 Bypass Paper Size Unit VR1 4036 253300 82 Theory of Operation Ver 1 0 Mar 2005 18 Conveyance section 18 Conveyance section 18 1 Composition bizhub C450 Transport Roller 403712C539AA 4037T2C559AA s e n 7 St 9 G et s 9 Transport Roller 4037T2C540AA 83 bizhub C450 s 5 S Q s s 9 19 Registration Roller section Theory of Operation Ver 1 0 Mar 2005 19 Registration Roller section 19 1 Composition Registration Roller 4037T2C560AA Registration Roller Clutch CL3 OHP Sensor PC27 Paper Dust Remover 4037T2C541AA 19 2 Drive Registration Rol
83. 505AA Operation 6 Immediately before the first 1 sided print leaves the Paper Exit Roller the direction of rotation of the Paper Exit Roller is reversed and the first 1 sided print for the third sheet is transported toward and into the Duplex Unit Atthe same time the second sheet of paper is fed into the main unit again 4535 T E 9 Operation 7 E The main unit carries out the first print cycle for the second t E sheet of paper to produce the print image of the third page 2 3l 4 of the original 8 e At the same time the first 1 sided print for the third is trans ported through the Duplex Unit Atthe same time the forth sheet of paper is taken up and fed into the main unit 4535M507AA Operation 8 While feeding the second 2 sided print out main unit pro 4 2 duces the print image of the 8th page of the original on the 5 fourth sheet of paper 8 The third sheet of paper will in front of the Duplex Unit Transport Roller 3 until the fourth sheet of paper has been operated switch back sequence 4535M508AA Steps 6 through 8 are repeated Automatic Duplex Unit i G g S Q e G 7 fe oO 5 Operation Theory of Operation Ver 1 0 Mar 2005 A4 2 originals 2 to 2 print mode 1
84. 583M615AA i G g S Q Q G 7 fe oO 5 2 3 Offsetting operation Whenever the paper is stacked it is moved toward the front or rear side by the Front or Rear Aligning Plate Accordingly the offsetting operation is made whenever the paper is fed onto the Finishing Tray Offset to Front Side Offset to Rear Side Rear Aligning Plate Offset Paper 4583M617AA 4583M616AA 1st Paper Exit Tray Front Aligning Plate 12 Theory of Operation Ver 1 0 Mar 2005 5 Operation 5 2 4 Exiting operation The Paddle driven by the Paddle Motor makes the Swing Guide move down and then the paper is taken up with the Upper and Lower Exit Arm Next the Exit Motor rotates in the forward direction to transport the paper taken up with the Exit Rollers toward the Exit Section by the Exit Rollers and the Exit Arm The Exit Belt Home Position Sensor turns OFF and then the Swing Guide moves up after the Motor has been driven for a given number of pulses The Exit Motor is driven to trans port a stack of paper with the Exit Arm of the Exit Belt rotating in synchronization with the Lower Exit Roller onto the 1st Paper Exit Tray FS 603 Paddle 1st Paper Exit Tray Exit Belt Lower Exit Roller Exit Belt Home Position Sensor PI7 FN Exit Arm 4583M618AA G e G
85. 7T2C551AA PC Drum Y M C K LED Chips i 2 w Q 2 E 5 4036ma2219c0 20 Theory of Operation Ver 1 0 Mar 2005 8 Write section PH section 8 2 Operation 8 2 1 Outline Each of the PC Drums is irradiated with LED light and an electrostatic latent image is thereby formed The LED print head is a fixed scanning type exposure system that includes approx 7 700 LED chips 600 dpi arranged in the main scanning direction and a SELFOC lens array or SLA that brings rays of light emitted by the LED chips to a focus on the surface of the PC Drum to form a full size image The special service jig for cleaning the surface of the LED print head should be used since a special coating is applied to the surface of the SLA to prevent ozone from sticking to it Transfer Belt 2nd Image Transfer Roller PC Drum Y 4 N 4036ma2004c1 Approx 7 700 LED chips SELFOC Lens 4036ma2222c0 21 bizhub C450 i G e G 7 fe 9 8 Write section PH section Theory of Operation Ver 1 0 Mar 2005 8 2 2 Color Shift Correction System In a tandem engine in which an independent image reproduction process is provided for each of the four different colors of toner Incorrect colo
86. C organic photo conductor Equivalent to 600 dpi White rare gas fluorescent lamp 30 W Equivalent to 600 dpi in main scanning direction x 1800 dpi in sub scanning direction Platen Stationary mirror scan Original Scanning Scanning in main scanning direction with a CCD one shot reading system Registration Rear left edge Paper Feeding System Standard Three way system Multiple Bypass 150 sheets Tray1 250 sheets Tray2 500 sheets Exposure System Four LED exposure Developing System HMT developing system Charging System DC comb electrode Scorotron system with electrode cleaning function manual Image Transfer System Intermediate transfer belt system Paper Separating System Selecting either application of nonwoven fabric bias or resistor grounding low pressure paper separator claws Fusing System Belt fusing 2 2 Functions Types of Original Sheets books and three dimensional objects Max Original Size or 11 x 17 Multiple Copies 1 to 999 Warm up Time 99 sec or less at ambient temperature of 23 C 73 4 F and rated source voltage Image Loss Leading edge 4 2 mm 3 16 inch Trailing edge 3 mm 1 8 inch Rear edge 3 mm 1 8 inch Front edge 3 mm 1 8 inch First Copy Time Tray1 A4 full size Monochrome print 5 5 sec or less Color print 8 5 sec or less Copying Speed for Multi copy Cycle
87. E 9 Theory of Operation Ver 1 0 Mar 2005 bizhub C450 G g Q e G 7 fe Blank Page vi Theory of Operation Ver 1 0 Mar 2005 Outline 1 System configuration 1 2 System Front View 1 System configuration 4037F1C501DA 1 2 3 4 5 Machine Working Table WT 501 Paper Feed Cabinet PC 202 Paper Feed Cabinet PC 102 Desk DK 501 6 7 8 9 10 Paper Feed Cabinet PC 402 Finisher FS 507 Job Separator JS 601 Finisher FS 603 Punch Kit PK 501 o re o a E N a 1 System configuration Theory of Operation Ver 1 0 Mar 2005 2 2 System Rear View o o a i N a 10 i 2 i 3 i 4 i 4037F1E503DA 1 Machine 6 Image Controller IC 402 2 Fax Kit FK 502 7 Video Interface Kit VI 502 3 Mount Kit MK 703 8 Local Interface Kit EK 702 4 Mount Kit MK 704 9 Mechanical Counter MC 501 5 Dehumidifier Heater 1C 10 Key Counter Kit KIT 1 Theory of Operation Ver 1 0 Mar 2005 2 Product specifications 2 Product specifications 2 34 Type Type Desktop type printer integrated with scanner Copying System Electrostatic dry powdered image transfer to plain paper Printing Process Tandem type indirect electrostatic recording system PC Drum Type Scanning Density Exposure Lamp Print Density OP
88. E FEE XUI X 22 2 oT EEE tor eer EE eir reete koe bs Croesi E aid crar rd detras 22 2 1 IDC Sensor LED intensity control 22 2 2 Max density conttol etienne isnt enano pi cin 22 2 8 Gamma correction control pe 22 3 Operation timing irren rni trn tnt ea Ern dne d nd en n 101 22 4 Operation fIOW siisii ete te rhet Re EE seed 102 2 irri ir Ce era a re de c eo Lee ERR RE ERE 103 23 1 Scanner section image processing block diagram 103 23 2 Write section image processing block diagram 1 23 3 Write section image processing block diagram 2 24 Other controla c diro n az uri e ba Fete D mand e dre Po ERR V2 n Eo LenEMEedagun 24 1 2 ObperatiOri iere een tinere bere bn rre DE ven RR RE ep ees Theory of Operation Ver 1 0 Mar 2005 24 2 Parts Operated When the Power Switch and Auxiliary Power Button CAII um Gae 111 24 2 1 Parts operated when the Power Switch and Auxiliary Power Button CI SUI Len 111 24 3 Counter control sssssssssssseseseeseeeeneneen enne nnne enn nen nennen ennt nnn nnns 112 24 3 1 COnSIT ctlon ciii E eio iE n RR HE KM ERE REN 112 bizhub C450 G e ni ie G 7 fe
89. MINOLTA BUSINESS TECHNOLOGIES INC Ver 1 0 After publication of this service manual the parts and mechanism may be subject to change for improvement of their performance Therefore the descriptions given in this service manual may not coincide with the actual machine When any change has been made to the descriptions in the service manual a revised version will be issued with a revision mark added as required Revision mark To indicate clearly a section revised show to the left of the revised section A number within represents the number of times the revision has been made To indicate clearly a section revised show in the lower outside section of the correspond ing page A number within A represents the number of times the revision has been made NOTE Revision marks shown in a page are restricted only to the latest ones with the old ones deleted When page revised in Ver 2 0 has been changed in Ver 3 0 The revision marks for Ver 3 0 only are shown with those for Ver 2 0 deleted When page revised in Ver 2 0 has not been changed in Ver 3 0 The revision marks for Ver 2 0 are left as they are 2005 03 1 0 Issue of the first edition Date Service manual Ver Revision mark Descriptions of revision Theory of Operation Ver 1 0 Mar 2005 CONTENTS 5 Outline 1 Product specification 5 x 22 Pappor type oie ie eiit niece ra d Cui tid Pu Free co REPE Reds direc
90. Path Theory of Operation Ver 1 0 Mar 2005 Paper Feed Path Output the 1st paper exit tray Transports to the 1st paper exit tray Output the 1st paper exit tray Transportation from Main Body 4683t1c001aa Transports to the punch position 2 2 Output the 2nd paper exit tray Output the 2nd paper exit tray Transportation from Main Body offset Transports to the Finisher tray 4683t1c002aa Aligning Staple Transports to the punch position Theory of Operation Ver 1 0 Mar 2005 3 Composition Composition Operation 3 Composition FS 507 Transport 1st Paper Exit Tray section Punch Section Transport section G e a e G 7 fe 9 4583t2c002aa Staple Section Finishing tray section 2nd Paper Exit Tray section 4 Drive Theory of Operation Ver 1 0 Mar 2005 4 Drive Lower Paddle Motor M9 FN FS 507 ar Ga Re lt CD Aligning Motor 5 Staple Unit Moving Motor M6 FN Shift Motor M8 FN Elevator Motor M7 FN i G g S Q e G 7 fe oO 4683t2c003aa Entrance Motor M1 FN Upper Entrance Motor 4 Punch Motor M11 FN Lower Entrance Motor M2 FN Exit Roller Rolls Spacing Motor M13 FN U
91. Roller HV1 Toner Collecting Screw s 2 S n St 9 s et s 9 4036 ma2024c2 Cleaning Brush 4037T2C575AA A Operation timing Since there is a possibility of the machine being stopped with toner left on the Transfer Belt the machine operates the Transfer Belt cleaning sequence when the Power Switch is turned ON or when the Right Door Left Door or Front Door is opened and closed Cleaning Start Signal Main Motor M1 Cleaning Brush Motor M22 Transfer Belt Cleaning Bias 4036ma2174c0 55 14 Transfer Corona section Theory of Operation Ver 1 0 Mar 2005 14 3 7 Transfer Belt Filming Cleaning Mechanism Acleaning mechanism is provided for refreshing the surface of the Transfer Belt when filming occurs on the belt The cleaning section for the Transfer Belt is provided with a Cleaner Belt Refresh Pad and a Cleaning Brush The Belt Refresh Pad is pressed against the surface of the Trans fer Belt to clean it using the Service Mode and through manual operation bizhub C450 Cleaning Brush Belt Refresh Pad s 2 S Q s n fe s 9 4037T2C586AA Cleaner 56 Theory of Operation Ver 1 0 Mar 2005 14 Transfer Corona section A Operation Loosening one screw provided at the Transfer Belt cleaning section will allow the Belt Refresh Pad to be pressed
92. Sheet Lift up Upper Limit Sensor PC114 PF PC123 PF Height difference of Guide Pate Lever Pick up Roller Polyethylene Sheet 4348MI Feed Roller Separation Roller ir Paper Empty Sensor PC115 PF PC124 PF Actuator EC 3 Pick up Roller Home Position 09 2 777 Pick up Roller Feed Position 8M609AA PC 102 PC 202 s St 9 s 5 et s 9 5 Operations Theory of Operation Ver 1 0 Mar 2005 5 1 2 Paper lifting motion When the drawer is slid into the main unit and the Set Sensor is activated the Lift up Motor starts rotating to raise the Paper Lifting Plate The paper stack of the drawer pushes up the Pick up Roller When the upper limit posi tion is detected through the action of the actuator it stops raising the paper lifting plate As paper is consumed during the print cycle and the Pick up Roller is lowered the Lift up Motor is energized until the Lift up Upper Limit Sensor is blocked again PC 102 PC 202 e A When the drawer is slid in 1 The paper lifting plate goes up and the top surface of the paper stack pushes up the roller 2 The lifting motion stops as soon as the sensor detects the upper limit position Lift up Upper Limit Sensor PC114 PF PC 123 PF Pick up Roller 4348M618AA 4348M619AA i G g Q e G 7 fe Paper Lifting Plate Lift up Arm
93. The developer fed to the rear of the Developing Unit is conveyed further to the upper screw 4 Because ofthe magnetic pole positioning of the Developing Roller the developer is conveyed onto the upper part of the Developing Roller The Doctor Blade then con trols the height of the developer brush to ensure that the developer on the Develop ing Roller levels out 5 The Toner sticks to the electrostatic latent image on the surface of the PC Drum The developer that is left on the Sleeve is returned to the upper screw by the mag netic pole positioning of the Developing Roller It is then conveyed to the front side of the Developing Unit For IU Y PC Drum Y Developing Roller Doctor Blade from Hopper M SupplylAgiating Conveying Screws seman 33 12 Developing section Theory of Operation Ver 1 0 Mar 2005 12 3 3 Developing bias The developing bias voltage Vdc is applied to the Developing Roller so that an ade quate amount of toner is attracted onto the surface of the PC Drum In addition to the negative DC component AC voltage is applied during development to help toner to be attracted more easily to the surface of the PC Drum This AC component is applied only while development is taking place At any other timing only the DC Vdc is applied The developing bias Vdc is supplied from High Voltage Unit 2 bizhub C450 12 3 4 HMT High grade Micro Toning devel
94. Upper Paddle Solenoid The Lower Paddles are turned by the Lower Paddle Motor FS 507 Upper Paddle Solenoid SL3 FN Upper Paddle Motor M15 FN Lower Paddle Lower Paddle Motor M9 FN Upper Paddle i G e G 7 fe E 5 4853M018AG 17 5 Operations Theory of Operation Ver 1 0 Mar 2005 5 4 Stapling 5 4 1 Stapling mechanism The Staple Unit performs the stapling action When the Stapling Motor turns the Clinch Arm lowers Then the Stapler moves up to drive a staple into paper and the staple is formed Staple position are rear corner at a point and front corner at a point and side at two FS 507 points Clinch Arm Stapling Motor i 5 9 D Stapler 4853M019AA 18 Theory of Operation Ver 1 0 Mar 2005 5 Operations 5 4 2 Staple unit moving mechanism Staple Unit is moved by the Staple Unit Moving Motor The Staple Home Position Sensor detects Staple Unit at respective home positions The Staple Unit is moved with reference to this home position FS 507 4683t2c004aa Staple Unit 2 Staple Unit 1 Staple Home Position Sensor PC14 FN Staple Unit Moving Motor M6 FN G e 9 G 7 fe E 9 19 5 507 i G g S Q e G 7 fe
95. W2 SW3 SW4 Sensor PC3 ON OFF ON OFF H A6R ON OFF ON OFF L A5 OFF ON OFF ON H B6R OFF ON OFF ON L B5 OFF OFF ON OFF H A5R OFF OFF ON OFF L A4 ON ON ON OFF OFF H B5R 5 OFF OFF OFF ON L A4R E ON ON ON OFF L B4 9 ON ON ON ON L A3 5 ON ON ON L A3 Wide 8 ON OFF OFF OFF L FLS 8 72 Theory of Operation Ver 1 0 Mar 2005 16 Paper feed section Inch Area Tray1 Paper Size Board PWB I1 Tray CD Paper Size Es Paper Size SW1 SW2 SW3 SW4 Sensor PC3 OFF OFF ON OFF H 5 5 x 8 5R L 85x11 x OFF OFF ON ON L 8 5x11R OFF ON OFF ON L Executive OFF ON ON OFF H Executive R ON OFF ON OFF L 5 5 x 8 5 ON ON ON OFF H 8 5x 14 ON ON ON ON L 11x17 OFF ON ON ON L A3 Wide Tray1 Paper Size Board PWB I1 Composition Operation 4036ma2042c1 73 16 Paper feed section Theory of Operation Ver 1 0 Mar 2005 B Tray2 T Tray2 Paper Size Board PWB I2 Tray2 CD Paper Tray2 CD Paper Size Sensor S Size Sensor L Paper Size 2 SW1 sw2 SW3 SW4 PC101 PC102 5 OFF OFF ON ON H L B5 ON OFF ON ON ON L L 5 1 ON OFF ON ON ON H L A4 ON ON OFF ON L L B5R ON ON OFF OFF OFF L H A4R OFF OFF OFF ON H L B4 OFF ON OFF OFF OFF H L ON ON ON ON L L 5 5 x 8 5 2 ON ON ON ON H H Lette
96. WY 13 Main Erase Y 3 Printer Image Processing 17 Developing i NE PC Drum Charging 6 LED Exposure The light reflected off the surface of the original is separated into different 11 Photoelectric colors using the color filters R G and B CCD then converts it into a cor Conversion responding electric signal and outputs the signal to the IR Imaging Pro cessing Section The electric signal is converted to 8 bit digital image signals After going through some corrections video signals C M Y and K are output to the Printer Image Processing Section IR Image Processing 2 The video signals C M Y go through some corrections Following digital to analog conversion these signals are used for the control of the intensity level of the LED Printer Image Processing 3 The image of the original projected onto the surface of the PC Drum is 4 PC Drum changed to a corresponding electrostatic latent image 5 PC Drum Charging A negative DC charge layer is formed on the surface of the PC Drum The surface of the PC Drum is irradiated with LED light and an electro static latent image is thereby formed The toner agitated and negatively charged in the Developer Mixing Cham ber is attracted onto the electrostatic latent image formed on the surface of 7 Developing the PC Drum It
97. achine gives a corresponding warning display 2 Atoner empty condition is detected if the T C reading taken by the TCR Sensor is lower by 0 5 than the target value for a given continuous period of time after the toner near empty condition has been detected The machine is then brought to stop 3 The toner empty condition is reset if the Toner Near Empty Sensor remains deacti vated for a given period of time or more after the Toner Cartridge set lever has been unlocked and locked or the Power Switch has been turned OFF and ON s amp S Q s s 5 Toner Near Empty Sensor Jo e M C K PC15 PC16 PC17 PC18 Toner Near Empty Sensor LED Y M C K PC21 PC22 PC23 PC24 Clear WindOW oic Toner Near Empty Toner Empty I RIEN I5 AC m ths fide LUE mr 4037T2E602AA 4037T2E601AA A different toner empty screen is displayed if User is selected for Unit Change avail able from the Tech Rep mode 42 Theory of Operation Ver 1 0 Mar 2005 13 Toner Supply section 13 3 3 Shutter mechanism To prevent toner from being spilled when the Toner Cartridge is removed from the machine there is a shutter mechanism provided When the Toner Cartridge is installed in the machine the shutter opens bizhub C450 Before Toner Cartridge is I
98. action Heater OFF cover open mal _ Retraction 1 Retracted lightly pressed condition for envelopes 91 bizhub C450 G e g G 7 fe 9 20 Fusing section Theory of Operation Ver 1 0 Mar 2005 20 3 3 Fusing temperature control The surface temperatures of the Heating Roller and Pressure Roller are detected using thermistors and the corresponding Heater Lamps are turned ON or OFF as necessary to E maintain the set fusing temperature E Temperature Control during the first in the morning warm up and setting using plain paper Warm up Completed Power Switch ON Start Key ON Canceled Y Y v v 1 2 3 4 5 6 7 lt gt gt gt c lt lt gt lt Heating Roller Thermistor TH1 Fusing Pres sure Roller Thermistor TH3 i G g S Q e G 7 fe 0 99 5 4037T2C578AA Temperature of the Fusing Pressure Roller at the start of the warm up cycle 60 C or less More than 60 C During the warm up cycle Heating Roller temperature 197 C 1 1 Fusing Pressure Roller temperature 112 C 1 5 1 If the temperature of the Fusing Pressure Roller at the start of the warm up cycle is 60 or less In standby state Heating Roller temperature 195 C Fusing Pressure R
99. adverse effects on the image due to dust on the shading sheet Memory called FIFO is employed to compensate for a deviation in the scanning position of the original which represents a gap between two adjacent CCD chips thereby matching the output timing of R G and B data Also the color aberration of the Lens is compensated at this time FIFO memories are used to enlarge or reduce the image The image is enlarged by increasing the number of data readings and reduced by decreasing the number of data readings The scanning are is divided into multiple blocks The ratio of color or monochrome is calculated for each of these blocks The machine then determines whether the entire original is colored or monochrome A histogram of lightness is also created for later AE processing R G and B data are then converted to value and color component data for adjust ments of saturation lightness and hue The scanning area is divided into two in the FD direction The lightness histogram generated through ACS processing is tallied for each four gradation levels A light ness histogram is then created for AE processing The AE level of the original is determined based on this histogram and AE processing is performed The R G and B image data is transmitted to MFP Control Board on the Write Section through the interface cable 104 Theory of Operation Ver 1 0 Mar 2005 23 Image processing 23 2 Write section image processing block diagram 1
100. al feeding Multi page feed due to flashes from holes Sheets with 2 to 4 holes Transport failure Sheets two folded or Z folded B4 or 11 x 17 Transport failure image deformation Sheets with rough surface e g letterhead Take up failure Sheets penciled Contamination Sheets folded E deformation multi page feed take up Sheets other than detectable size sheets Image deficit Sheets of less than 35 g m 9 25 Ib Take up failure Theory of Operation Ver 1 0 Mar 2005 1 Product specification 1 6 Mixed original feed chart 5 For Metric 9 ne Or Max Original 297 mm 257 mm 210mm 182 mm 148 mm 5 Size EE o Mixed Original Size A3 A4 B4 B5 A4R A5 B5R A5R E 8 A3 OK OK 297 mm A4 OK OK B4 OK OK OK OK 257 mm B5 OK OK OK OK A4R OK OK OK OK OK OK 210 mm A5 NG NG OK OK OK OK 182 mm B5R NG NG OK OK OK OK OK 148 mm A5R NG NG NG NG NG NG OK OK For Inch Max Original 11 8 5 55 Size Mixed Original Size 11x17 85x11 85x14 8 5x 11R 5 5 8 5 5 5 x 8 5R T 11x17 OK OK 8 5 x 11 OK OK 8 5x14 OK OK OK OK OK 8 5 8 5 x 11R OK OK OK OK OK 5 5x8 5 NG NG OK OK OK 5 5 5 5 x 8 5R NG NG NG NG NG OK OK Mixed Original Feed available Tilted with in 1 5 or less NG NO Mixed Original Feed Can not Set
101. aning main erase operation 1 The Cleaning Blade is pressed up against the surface of the PC Drum scraping residual toner off the surface forward blade system 2 Toner which has been scraped off the surface of the PC Drum is fed by the Toner Collecting Screw back toward to the Conveying Screw in the rear of the machine It is then collected in the Waste Toner Collecting Box 3 The surface of the PC Drum after the image transfer process is irradiated with light from the Main Erase Lamp This neutralizes any potential left on the surface of the PC Drum Toner Collecting Screw Cle ning Blade Main Erase 4036 253900 Lamp Cleaning Blade 4036ma2505c0 30 Theory of Operation Ver 1 0 Mar 2005 12 Developing section 12 Developing section 12 1 Composition Doctor Blade bizhub C450 Developing Roller Supply Agitating Conveying Screws 4037T2C513AA 4037T2C552AA K PC Motor M7 Developing Clutch K CL2 PC Drum K t G e i G 7 fe 9 Developing Roller Color PC Drum Motor M5 Color Developing Motor M6 Supply Agitating Conveying Screws 4037T2C515AA 4037T2C514AA 31 12 Developing section Theory of Operation Ver 1 0 Mar 2005 12 2 Drive K PC Motor M7
102. anism A Entrance section paper transport mechanism 5 Operations The Entrance Roller is turned to transport the paper into the Finisher as the Entrance Motor is energized Entrance Motor M1 FN Entrance Roller 4853M007AD FS 507 i G e l G 7 E 9 5 Operations Theory of Operation Ver 1 0 Mar 2005 B 1st paper exit tray paper transport mechanism Paper transport to the 1st paper exit tray takes place when the Finisher is in the Group mode The Upper Path Transport Roller and 1st TrayExit Roller turn to transport the paper into the 1st paper exit tray as the motor is energized The 1st Tray Entrance Switching Solenoid and Upper Lower Entrance Switching Sole noid are energized to select the paper path into the 1st paper exit tray FS 507 e Upper Entrance Motor M4 FN Upper Path Transport Roller 1st tray Exit Roller Composition Operation S 4853M008AB Upper Lower Entrance Switching Solenoid SL1 FN 4853M011AE 1st Tray Entrance Switching Solenoid SL2 FN 10 Theory of Operation Ver 1 0 Mar 2005 5 Operations C Finisher tray paper transport mechanism Paper transport to the Finisher Tray takes place when the Finisher is in the Staple mode As the Lower Entrance Motor is energized the Storage Roller turns to transport the paper toward the exit direction By turning the Exit Motor backward pape
103. ansfer Roller mechanism The machine is provided with a mechanism that presses the 1st Image Transfer Rollers up against the inside of the Transfer Belt during the 1st image transfer stage The 1st Image Transfer Pressure Retraction Motor M11 provides the drive for this operation The 1st Image Transfer Retraction Position Sensor detects the 1st Image Transfer Roller at its retracted position The pressure position is determined through pulse control bizhub C450 A Pressure retraction operation Pressure operation 1 Drive from the 1st Image Transfer Pressure Retraction Motor is transmitted through a gear train to the drive gear 2 Rotation of the drive gear turns the pressure cam which allows the Sliding Plate to move 3 Asthe Sliding Plate moves the spring is released This lowers the 1st Image Trans fer Roller and the roller presses against the Transfer Belt Retraction operation 1 When the drive gear turns backward the pressure cam also turns backward push ing to move the Sliding Plate 1 Asthe Sliding Plate moves the Pressure Lever is then pressed to raise the 1st Image Transfer Roller allowing the roller to leave the Transfer Belt i G g S Q e G 7 fe 1st Image Transfer Retraction Motor M1 1 4036 2159 0 When Pressed Spring Pai 4036ma2021c1 4036ma2022c1 1st Image Transfer Roller Operation timing Start Key ON P
104. ansport mechanism o The Pick Up and Take Up Rollers are rotated by the Take Up Motor and an original is taken up and transported to the Registration Roller E 2 Then the original is transported onto the Original Glass by the Registration Roller driven 5 8 by the Take Up Motor and the Transport Belt driven by the Transport Motor gt M Transport Motor M2 DF Take Up Roller Pick Up Rollers G S Q e G 7 fe Registration Sensor PC1 DF Pick Up Sensor PC2 DF 4582M003AA Registration Roller Registration Clutch CL1 DF Theory of Operation Ver 1 0 Mar 2005 5 Operation A Document take up operation flow Registration Clutch ON Take Up Motor Forward Rotation Pick Up Rollers go down and rotated via timing belt amp gears Document Feeder Automatic v At the same time Document Stoppers go up An original is taken up and transported A loop is formed to correct the skew feeding after Registration Sensor is activated Take Up Motor OFF Registration Clutch OFF release of Registration Roller Take Up Motor Backward Rotation The original is transported Pick Up Sensor ON v Start of the original size detection in the feeding direction Take Up Motor OFF B Document transport operation flow G e g
105. aper Moves Past 2nd Image Transfer Roller Main Motor M1 1st Image Transfer Pressure Retraction Motor M1 1 1st Image Transfer Retraction Position Sensor PC12 4036ma2160c0 48 Theory of Operation Ver 1 0 Mar 2005 14 Transfer Corona section B Pressure position changing mechanism To extend the service life of the PC Drum Y M C the pressure position of the 1st Image Transfer Roller is changed between the monochrome mode and the color mode In the monochrome mode the 1st Image Transfer Roller Y M C is left in the retracted position and the PC Drum Y M C is stopped The pressure position is changed by varying the pulse count of the 1st Image Transfer Pressure Retraction Motor which results in the pressure cam stop position being varied The pressure position of the Image Transfer Roller is also changed by changing the stop position of the Sliding Plate o re X o a E a Color mode The pressure position of the Image Transfer Roller is where the PC Drum is in contact with the Transfer Belt for all four colors of toner Monochrome mode The pressure position of the Image Transfer Roller Y M C is where the PC Drum Y M C leaves the Transfer Belt While that of the Image Transfer Roller K is where the PC Drum K is in contact with the Transfer Belt This allows the PC Drum Y M C to remain station ary in this mode E Sliding Plate m Cam Position
106. d in a poorly ventilated room b When taking a lot of copies c When using multiple products at the same time Stability N CAUTION Be sure to lock the caster stoppers In the case of an earthquake and so on the product may q slide leading to a injury Inspection before Servicing N CAUTION Before conducting an inspection read all relevant docu mentation service manual technical notices etc and proceed with the inspection following the prescribed pro 4 using only the prescribed tools Do not make any a adjustment not described in the documentation If the prescribed procedure or tool is not used the prod uct may break and a risk of injury or fire exists Before conducting an inspection be sure to disconnect the power plugs from the product and options When the power plug is inserted in the wall outlet some units are still powered even if the POWER switch is turned OFF A risk of electric shock exists The area around the fixing unit is hot You may get burnt SAFETY AND IMPORTANT WARNING ITEMS Work Performed with the Product Powered On NWARNING Take every care when making adjustments or performing an operation check with the product powered If you make adjustments or perform an operation check with the external cover detached you may touch live or high voltage parts or you may be caught in moving gears or the timing be
107. d resumes the print cycle for the rest of printed pages to be produced after the Fusing Pressure Roller tem perature reaches 130 C Ordinary warm up completed Fusing Pressure Roller tem perature exceeds 60 195 145 High humidity warm up com pleted machine interior humid ity is 70 or more 195 155 Priority is given to this mode if the humidity is 7096 or more Recovery from Power Save 195 Temperature control during Power Save is 165 for the Heating Roller and 155 for the Fusing Pressure Roller 93 bizhub C450 G e G 7 fe E 9 20 Fusing section Theory of Operation Ver 1 0 Mar 2005 B During a copy cycle To achieve the intended level of fusing performance the set temperature of each roller is varied according to the paper type 3 Paper Type Heating Roller Set Pressure Roller Set B Temperature Temperature Plain paper 215 mm s 195 145 Plain paper 165 mm s 190 145 Plain paper 60 mm s 160 130 2nd side plain paper 215 mm s 185 145 2nd side plain paper 165 mm s 185 145 2nd side plain paper 60 mm s 160 130 Thick paper 1 175 130 Thick paper 2 185 130 Thick paper 3 185 130 2nd side thick paper 1 170 130 5 2nd side thick paper 2 175 130 5 2nd side thick paper 3 175 130 9 Envelopes 185 130 E OHP when the absolute humidity or the machine
108. dation reproduction Theory of Operation Ver 1 0 Mar 2005 23 Image processing 23 3 Write section image processing block diagram 2 From the MFP Control Board SS bizhub C450 20 High speed LED drive i LED Drive Board 1 1 1 1 21 High speed LED drive 1 1 1 1 22 Intensity correction zi To each LED Unit 20 Corrects skew in the print position at 1 800 dpi to ensure correct alignment in the main scanning direction between each of the Y M C and K LPH assemblies and the PC Drums 21 Rearranges the image data which has undergone the processes up to screening so that the LEDs can then be illuminated and transfer the corrected image data 22 Adjusts the variations in each of the LEDs approx 7 700 chips to ensure that each emits a uniform intensity of light i G e g G 7 fe E 9 107 24 Other control Theory of Operation Ver 1 0 Mar 2005 24 Other control 24 1 Fan control 24 1 1 Construction bizhub C450 Paper Cooling Fan Motor M26 Fusing Cooling Fan Motor 1 M9 Scanner Cooling Fan Motor M202 Cooling Fan Fusing Cooling Fan Motor 3 M16 Motor 2 M10 Draws outside air in Toner Suction Exhausts heat Fan Motor K M23 Fusing Cooling Fan Motor 2 M15 Toner Suction Fan Motor M20 i G g S Q e G 7 fe
109. e PC Drums The use of gears having a large diameter provides a large number of gear teeth which suppresses uneven pitch and eccentricity Drive is transmitted to each of the PC Drums when the triangular coupling is engaged with the mating part that also has a triangular shape Color PC Drum Motor M5 K PC Motor M7 q Coupling see Coupling Large diameter Gear s ES St 9 s et s 9 4036ma2552c0 4036ma2544c0 10 3 2 PC Drum Phase control To enhance image quality sensors are used to detect operating conditions while the Drum turns thereby providing drum drive control 27 10 Photo Conductor section Theory of Operation Ver 1 0 Mar 2005 10 3 3 PC Drum small amount rotation control Humidity around the IU can produce a difference in sensitivity among different PC Drums This could lead to drum memory allowing black bands to occur in the image In addition ozone stagnant in areas near the PC Drum Charge Corona reduces sensitivity of the PC Drums causing white bands to occur in the image To prevent these image problems that the PC Drum is turned at regular intervals to keep the surface sensitivity uniform bizhub C450 A PC Drum small amount rotation timing The PC Drum is turned the small amount when a predetermined threshold value of the cumulative PC Drum driven distance is exceeded dur
110. echanism es 7 S 5 2 3 Shifter drive mechanism ee 7 5 2 4 Paper empty nnne nnne 8 Theory of Operation Ver 1 0 Mar 2005 PC 402 G g Q e G 7 fe oO Blank Page Theory of Operation Ver 1 0 Mar 2005 1 Product specification Outline 1 Product specification 8 11 Type amp Name Large Capacity Cabinet Type Front loading type LCC Installation Desk type Center Document Alignment 1 2 Paper type Paper Type Plain paper 56 to 256 g m 15 to 68 Ib Recycled paper 60 to 90 g m 16 to 24 Ib Paper Size A4 8 5 x 11 Capacity 2500 sheets 80 g m 21 25 Ib 1 3 Machine specifications Power Requirements DC 24 V 10 95 supplied from the main unit 5 5 96 45 W less Consumption Dimensions 570 mm W x 263 mm H x 548 mm D 22 5 inch W x 10 25 inch H x 21 5 inch D Weight 25 9 kg 57 Ib 1 4 Operating environment Conforms to the operating environment of the main unit NOTE These specifications are subject to change without notice 2 Paper Feed Path Theory of Operation Ver 1 0 Mar 2005 2 Paper Feed Path Transportation to main body Main body PC 402 Paper feed in LCC 4061t1c101aa Main tray Sub tray
111. ectric shock while operating the product Connect power plug to grounded wall outlet 5 4 SAFETY AND IMPORTANT WARNING ITEMS Power Plug and Cord NWARNING When using the power cord set inlet type that came with this product make sure the connector is securely inserted in the inlet of the product When securing measure is provided secure the cord with the fixture properly If the power cord inlet type is not connected to the prod uct securely a contact problem may lead to increased resistance overheating and risk of fire Check whether the power cord is not stepped on or pinched by a table and so on Overheating may occur there leading to a risk of fire Check whether the power cord is damaged Check whether the sheath is damaged If the power plug cord or sheath is damaged replace with new power cord with plug and connector on each end specified by KMBT Using the damaged power cord may result in fire or electric shock Do not bundle or tie the power cord Overheating may occur there leading to a risk of fire Check whether dust is collected around the power plug and wall outlet Using the power plug and wall outlet without removing dust may result in fire Do not insert the power plug into the wall outlet with a wet hand The risk of electric shock exists When unplugging the power cord grasp the plug not the cable The cable may be broken
112. eory of Operation Ver 1 0 Mar 2005 5 2 Transport Control 5 2 1 Duplex Unit Transport Motor Control Rotation of the Duplex Unit Transport Motor is controlled by the signals output from the Duplex Control Board 5 2 2 2 sided printing method Automatic Duplex Unit The following two types of 2 sided printing methods are available 2 sided printing with a single sheet of paper resident in the system 2 Sided Printing Methods 2 sided printing with two sheets of paper resident in the system FD length 215 9 mm or less A Operations in 2 sided printing with a single sheet of paper resident in the system Operation 1 Paper Exit Roller 5 The first sheet of paper is taken up and fed in from the I main unit drawer and the main unit starts the first print 2 cycle to produce the print image of the second page of the gs posee ginal 2 8 co fe 4657 521 Operation 2 Immediately before the 1 sided print leaves the Paper Exit a Roller the direction of rotation of the Paper Exit Roller is 23 CO reversed and the 1 sided print is transported toward and into the Duplex Unit 4657 522 Operation 3 The 1 sided print moves through the Duplex Unit and is directly subject to the second print cycle without being stopped pp 2 4657M523AA Theory of Operation Ver 1 0 Mar 2005 5 Operation Operation 4 The main unit carri
113. er 1 0 Mar 2005 19 3 2 OHP detection To prevent failed prints of OHP film whether or not the paper type fed through is a piece of OHP film is detected using the OHP Sensor OHP detection is made after a loop has been formed in the paper at the Registration Roller If the paper type setting made on the control panel does not match the results of OHP detection the machine stops copying and gives a paper misfeed warning display Position on Paper Results of OHP Sensor Setting Dial or paper type PC27 Detection Operation set from control panel OHP Other than OHP Determines that there is mismatch of paper type bringing all mechanisms to an immedi ate stop Gives a warning message that there is mis match of paper type on the display Other than OHP OHP Ready to copy Ready to copy Memory 100 mm 5278 Change Tray Settings gt Tray 1 Paper D 4037 2 605 a Registration Roller OHP Sensor 27 ru LI 4036ma2197c0 86 Theory of Operation Ver 1 0 Mar 2005 20 Fusing section 20 Fusing section 20 1 Composition bizhub C450 Upper Paper Separator Claw 4037T2C543AA 4037T2C561AA Heating Roller Thermostat TS1 Fusing Pressure Roller Thermistor TH3 Heating Roller Pressure Roller Fusing Pressure Roller Heater Lamp H3 s 2 S n St 9
114. er Pressure Plate and nip area of the Folding Rollers FS 603 Upper Transport Roller QA Paper Pressure Plate G e n G 7 fe E 9 4583M628AA Lower Transport Roller Folding Roller 25 5 603 i G g S Q e 7 fe 5 Operation Theory of Operation Ver 1 0 Mar 2005 D Folding exit The Paper Pressure Plate presses the center of the paper to transport the paper toward the Paper Folding Rollers Then the Paper Folding Rollers take up and fold the paper and feed the stack of paper onto the 2nd Paper Exit Tray through the Folding and the Booklet Exit Rollers Paper Pressure Plate 4583 629 Booklet Exit Roller Folding Roller 26 Theory of Operation Ver 1 0 Mar 2005 5 Operation 5 4 3 Folding mechanism The Paper Folding Mechanism consists of the Folding Rollers and Paper Pressure Plate They are driven by the Staple Folding Motor respectively through the combination of the Gears and Cams etc This Motor drive is monitored with the Staple Folding Motor Clock Pulse Sensor The Folding Position Sensor is mounted to detect the position of the Folding Rollers and the Pressure Plate The stack of folded paper is transported with the Folding Rollers and then exits via the Booklet Exit Rollers Folding Home Position Sensor PI11
115. er called the CE from the risk of injury However in daily use any electrical equipment may be subject to parts wear and eventual failure In order to maintain safety and reliability the CE must perform regular safety checks 1 Power Supply Connection to Power Supply NWARNING Check that mains voltage is as specified Connection to wrong voltage supply may result in fire or Q electric shock Connect power plug directly into wall outlet having same configuration as the plug Use of an adapter leads to the product connecting to inadequate power supply voltage current capacity aD grounding and may result in fire or electric shock If proper wall outlet is not available advice the customer to contact qualified electrician for the installation Plug the power cord into the dedicated wall outlet with a capacity greater than the maximum power consumption Q If excessive current flows in the wall outlet fire may result If two or more power cords can be plugged into the wall outlet the total load must not exceed the rating of the wall outlet aD If excessive current flows in the wall outlet fire may result Make sure the power cord is plugged in the wall outlet securely Contact problems may lead to increased resistance overheating and the risk of fire Check whether the product is grounded properly If current leakage occurs in an ungrounded product you may suffer el
116. eration Ver 1 0 Mar 2005 a gt N Blank Page 10 Theory of Operation Ver 1 0 Mar 2005 6 Overall composition Composition Operation 6 Overall composition 6 1 Timing chart at machine power up bizhub C450 Main Motor M1 Color PC Drum Motor M5 Color Developing Motor M6 K PC Motor M7 Fusing Drive Motor M2 Cleaning Brush Motor M22 Developing Bias DC Y M C Charge Corona Bias Color Developing Bias DC K G e n G 7 fe E 5 Charge Corona Bias Suction Fan Motor M12 Toner Suction Fan Motor K M23 Toner Suction Fan Motor M20 Cooling Fan Motor 2 M10 Fusing Cooling Fan 2 3 M15 16 Fusing Cooling Fan Motor 1 M9 Cooling Fan Motor 1 M24 Cooling Fan Motor 3 M25 Power Supply Cooling Fan Motor M21 4037T2E594AA 11 6 Overall composition Theory of Operation Ver 1 0 Mar 2005 6 2 Control block diagram Scanner Section bizhub C450 CCD Sensor Exposure Lamp Board PWB A Inverter Board gt FL201 t 1 Scanner Motor Drive lt gt Board PWB IC Image Processing Board PWB C Scanner Motor 201 lt gt DF 601 Panel tu Printer Section Copier Board PWB CF 2 MFP Control Board PWB MFP be G Q e
117. eres i henhold til fabrikantens instruksjoner S 12 SAFETY AND IMPORTANT WARNING ITEMS 5 FUSE CAUTION Double pole neutral fusing ATTENTION Double p le fusible sur le neutre 6 LED Radiation Safety This product is a copier which operates by means of a LED light emitting diodes expo sure system There is no possibility of danger from the LED optical radiation because the LED optical radiation level dose not exceed the accessible radiation limit of class 1 under all conditions of operation maintenance service and failure 5 13 SAFETY AND IMPORTANT WARNING ITEMS WARNING INDICATIONS ON THE MACHINE Caution labels shown are attached in some areas on in the machine When accessing these areas for maintenance repair or adjustment special care should be taken to avoid burns and electric shock 4037P0C501DA S 14 SAFETY AND IMPORTANT WARNING ITEMS AN High voltage 4037P0C502DA 5 15 SAFETY AND IMPORTANT WARNING ITEMS WARNING 1 ATTENTION WARNUNG wm ATENCI N uz AVVERTENZA WARNING ATTENTION WARNUNG ATENCI N ATTENZIONE 2 TONER YELLOW 110 Net Weight 230g 81102 MADE IN JAPAN L NWARNING ATTENTION A WARNUNG A 2 A ATENCI N ABT A AWISO IA A AVISO 4037P0C503DA CAUTION You may be burned or injured if you touch any area that you are advised not to touch by any caution label Do n
118. es out the second print cycle to produce the print image of the first page of the original on the other 8 ee side of the 1 sided print 715 co Operation 5 While feeding the first 2 sided print out of itself the main P4 8 unit carries out the first print cycle for the second sheet of paper to produce the print image of the fourth page of the 1 A original 4657M524AA 4657M525AA Steps 2 through 5 are repeated A4 2 originals 1 to 2 print mode Synchronizing Roller Sensor PC28 Exit Sensor PC10 Switchback Motor M1 DU Duplex Unit Transport Motor M2 DU Duplex Unit Transport Sensor 2 PC1 DU oF Backward i Forward ON Rotation Rotation H Rotation 4657M510CA Automatic Duplex Unit i G e G 7 fe 5 5 Operation Theory of Operation Ver 1 0 Mar 2005 B Operations in 2 sided printing with two sheets of paper resident in the system 2 x Operation 1 Paper Exit Roller 2 The first sheet of paper is taken up and fed in from the main unit drawer and the main unit starts the first print 9 tee 5 cycle to produce the print image of the second page of the 8 en t 5 original 2 lt 4657 515 Operation 2 Immediately before the first 1 sided print leaves the Paper Exit Roller the direction
119. han above OHP or OHP interleaves Turns at full speed for the period of 10 sec after Turns at full speed when the Main Motor M1 is energized the Main Motor M1 has been deenergized Fusing Cooling Fan Motor 2 and 3 M15 and M16 Mode other than above Turns at full speed when the Main Motor M1 is energized and the Exit Sensor PC 30 is acti vated Turns at full speed for 10 sec after the Main Motor M1 has been deenergized In standby Turns at half speed Suction Fan Motor M12 Turns at full speed when either the Main Motor M1 or Fusing Drive Motor M2 is energized Turns at full speed for 30 sec after the Main Motor M1 and Fusing Drive Motor M2 have been deenergized and then is deenergized Cooling Fan Motor 2 M10 Turns at half speed 30 sec after the above event Fusing Cooling Fan Motor 1 M9 Turns at full speed when the Main Motor M1 and Fusing Drive Motor M2 are energized Turns at full speed for 30 sec after the Main Motor M1 and Fusing Drive Motor M2 have been deenergized and then is deenergized Turns at half speed 30 sec after the above event 109 bizhub C450 G e G 7 E 9 bizhub C450 i G g S Q e 7 fe 24 Other control Theory of Operation Ver 1 0 Mar 2005 Motor Name Paper Passage Mode Control Cond
120. has been discontinued Theory of Operation Ver 1 0 Mar 2005 17 Bypass section 17 1 Composition 17 Bypass section On T L M d Bypass Paper Take up Roller 4037T2C558AA Bypass Separator Roller Bypass FD Paper Size Sensor 1 PC111 Bypass FD Paper Size Sensor 2 PC112 Bypass FD Paper Size Sensor 3 PC113 Bypass Paper Empty Sensor PC110 Paper Lifting Plate Bypass Paper Pick up Solenoid 4037T2C535AA Bypass FD Paper Size Sensor 4 PC114 4037T2C536AA 77 bizhub C450 s E 7 St 9 s et s 9 17 Bypass section Theory of Operation Ver 1 0 Mar 2005 17 2 Drive Bypass Lift up Sensor PC115 Bypass Paper Feed Clutch CL101 bizhub C450 Bypass Paper Pick up Solenoid SL101 4037T2C537AA Bypass Lift up Sensor PC115 Bypass Paper Feed Clutch CL101 Q Bypass Paper Take up Roller i 2 w Q 2 E 5 Tray2 Vertical Transport Motor M103 Bypass Paper Pick up Solenoid SL101 4037T2C538AA 78 Theory of Operation Ver 1 0 Mar 2005 17 Bypass section 17 3 Operation 17 3 1 Bypass Paper Take up control Start Key ON Move to Standby Position Tray2 Vertical Transport Motor M103 Bypass Paper Pick up Solenoid SL101 Bypass Lift up Sen
121. he revision marks for Ver 3 0 only are shown with those for Ver 2 0 deleted When page revised in Ver 2 0 has not been changed in Ver 3 0 The revision marks for Ver 2 0 are left as they are 2005 03 1 0 Issue of the first edition Date Service manual Ver Revision mark Descriptions of revision Theory of Operation Ver 1 0 Mar 2005 CONTENTS Outline 1 1 1 JS 601 2 3 1 4 Machine specifications onere nt ttn tnnt t einen 1 5 Operating environment 2 Paper Feed Palli treten trn thai oth eer n nec ren ni ue Composition Operation 3 COMPOSINOM sc 4 Operatie terre terete 4 4 1 Job tray paper transport mechanism 4 Composition Operation Theory of Operation Ver 1 0 Mar 2005 JS 601 G g Q e G 7 fe oO Blank Page Theory of Operation Ver 1 0 Mar 2005 1 Product specification Outline 1 Product specification 1 1 Type S Name Job separator Installation Fixed to Finisher Document Alignment Center 1 2 Functions Modes Non Sort in the fax or printer output mode 1 3 Papertype Paper Type Paper Size Weight Tray Capacity Plain paper ASR to 60 to 90 g m 100 sheets 5 5 x 8 5R to 16 to 24 Ib 4 8 5 x 11 80 g m 21 75 Ib 11 17 50 sheets except A4 8 5 x 11 80 g m 21 75 Ib Height up to
122. heory of Operation Ver 1 0 Mar 2005 5 6 PUNCH MECHANISM 23 5 6 1 Purich Opaeratior i pe E stie to ta ere E an E FOEDE SERERE EX CREER 23 5 6 2 Inch drea 24 5 507 G g Q e G 7 fe Theory of Operation Ver 1 0 Mar 2005 1 Product specification LL Outline 1 Product specification 1 1 Type Type Multi Staple Finisher Installation Freestanding Document Alignment Center Supplies Option Staple Cartridge Job separator JS 601 Sweden Punch Kit PK 506 1 2 Functions of Holes Metric 4holes Inch 2holes 3holes Modes Normal Group Sort Group Offset Sort Offset Sort Staple Group staple Punch Group Punch Sort Punch Group Offset Punch Sort Offset Punch Sort Staple Punch 1 3 Papertype Remove the Finisher off the Copier for feeding the long paper The maximum loading capacity shown is for when loading the single type of paper 80g m 1 3 1 Group Group offset Paper Type Paper Size Weight Tray Capacity Exit Tray No of Sheets to be Stapled Plain paper B5R B5 to 60 to 90 250 sheets 1st paper Wide g m exit tray 5 5 x 8 5R 16 to 24 Ib 5 5x8 5 Thick paper to 13 x 19 60 to d 20 sheets OHP Film g m Translucent 16 10 681 Envelope Label paper Letterhead KR E e uc
123. hes the Tray1 Double Feed Sensor during the paper take up sequence for the first sheet of paper the paper take up motion is delayed to allow an appropriate distance between two successive sheets of paper 1st Sheet of Paper G e 9 G 7 fe E 9 amp Registration Roller Tray1 Paper Take up Roller 2nd Sheet of Paper b Tray1 Double Feed Sensor PC13 4036ma2115c0 16 3 3 Deceleration control Deceleration control is provided only when paper is fed from Tray2 Tray3 4 LCC or Bypass with a system speed of 215 mm sec 165 mm sec or 60 mm sec The Tray2 Vertical Transport Motor M103 Tray3 Transport Roller Motor M120 PF Tray4 Trans port Roller Motor M121 PF and Transport Roller Motor M2 LCT are controlled so that the period of time that begins when the paper take up sequence is started and ends when the leading edge of the paper reaches the Registration Roller becomes a predeter mined value The control thereby prevents a paper misfeed from occurring and ensures productivity The deceleration control is provided based on the information on the timing at which the Tray2 Vertical Transport Sensor PC108 Tray3 Vertical Transport Sensor PC117 PF Tray4 Vertical Transport Sensor PC126 PF and LCT Vertical Transport Sensor PC2 LCT are activated 69 bizhub C450 s 5 Q s
124. ift Motor Pulse Sensor PC11 FN 2nd paper exit tray Shift Home Position Sensor PC10 FN 4853M023AG 22 Theory of Operation Ver 1 0 Mar 2005 5 Operations 56 PUNCH MECHANISM The paper being transported through the Finisher is briefly stopped and holes are made in a space near its trailing edge When the Punch Motor is energized and the electromagnetic spring clutch fitted to the Punch Roller is energized the Punch Bars move up and down to make holes in the paper FS 507 Punch Motor M11 FN Entrance Motor M1 FN Entrance Roller Eccentric Cams i G e n G 7 fe E 9 Electromagnetic Clutch pring 4643M014AE Punch Bars Punch Roller 5 6 1 Punch Operation The Entrance Motor is energized and paper is allowed into the Finisher 2 The trailing edge of the paper moves past the Paper Sensor of the Horizontal Transport Unit 3 A given period of time thereafter the Upper Entrance Motor or Lower Entrance Motor is deenergized to bring the paper to a stop 4 The electromagnetic spring clutch is energized to turn the Punch Roller and the eccentric cams 5 The Punch Bars move up and down to make holes in the paper 6 The Upper Entrance Motor or Lower Entrance Motor is energized to transport the paper 23 5 Operations Theory of Operation Ver 1 0 Mar 2005 5 6 2 Inch area The Hole Position Selector Motor and Hole Punch Po
125. ing Position Entrafice gt E 4 Stapling Position Stopper 4583t2c003aa For 2 point Center stapling operation The 2 point center stapling operation is the same as 2 point side stapling 20 Theory of Operation Ver 1 0 Mar 2005 5 Operation 5 3 6 1st Paper Exit Tray mechanism The 1st Paper Exit Tray is moved up or down by drive from the Shift Motor and the Exit Tray Sensor detects if the paper is stacked on the 1st Paper Exit Tray The Exit Tray Home Position Sensor detects if the 1st Paper Exit Tray is at its home posi tion e f the paper is stacked on the 1st Paper Exit Tray home position is at the top side of paper and if not the home position is at the edge of the 1st Paper Exit Tray When the main power is turned ON the 1st Paper Exit Tray is returned to its home posi tion by drive of the Shift Motor After the paper has exited from the Finishing Tray and has been stacked onto the 1st Paper Exit Tray the 1st Paper Exit Tray is moved down by the Shift Motor driven for a given number of clock pulses The Clock pulse detection is generated with the Shift Motor Clock Sensor and the 1st Paper Exit Tray is returned to its home position for the next stacking operation The Upper limit position of the 1st Paper Exit Tray is detected with the Shift Upper Limit Sensor When the Shift Upper Limit Sensor is turned ON upward movement drive f
126. ing a multi print cycle or when inter mittent print cycles are consecutively run with an intermission of less than a predeter mined period of time between them PC Drum i G g S Q e G 7 fe 4036ma2549c0 28 Theory of Operation Ver 1 0 Mar 2005 11 Charge Corona section 11 Charge Corona section bizhub C450 Corona Wire 4037T2C511AA 4037T2C552AA Grid Mesh s e n 7 et 9 s et 9 4037T2C512AA Cleaning Blade gS Q Corona Wire Y M C K FE Main Erase Lamp Y M C K LA2 4037T2C506AA 29 bizhub C450 s amp S Q s s 11 Charge Corona section Theory of Operation Ver 1 0 Mar 2005 11 1 Operation 11 1 1 PC Drum Charge Corona ON OFF control The grid voltage Vg applied to the Grid Mesh is controlled through the image stabiliza tion control Color PC Drum Motor Energized __ Motor Energized Drum Charge Corona Bias Y M C Drum Charge Corona Bias K Color Developing Motor M6 Developing Clutch K CL2 4036ma2251c0 11 1 2 Cleaning Main Erase mechanism A Cle
127. ion Y Y Makes image transfer ATVC Checks whether the Transfer Belt adjustment Unit is mounted or not Y z Y Runs image stabilization T New unit detection check sequence E y a Q New Unit is release Life counter clear E 60 Theory of Operation Ver 1 0 Mar 2005 14 Transfer Corona section 14 3 11 ACS control This machine adopts ACS control which controls switching of the print mode according to the number of the continuous monochrome originals to achieve both a higher copying productivity and longer service life of the consumables This control functions in the ACS mode only ACS Auto Color Selection Inthe ACS control the number of the continuous monochrome originals is checked when the color originals are switched to the monochrome ones If the number of the continuous monochrome originals is less than a predetermined value monochrome printing is made in the color mode If however the number of the continuous monochrome originals is the predetermined value or more the print mode is switched to monochrome since the time wasted for PC Drum rotation is larger than the time loss required for switching to the monochrome mode The ACS control does not function until the number of the continuous monochrome orig inals has been counted Accordingly ACS control is provided only within the range of the number of the originals scanned for the first set of copies This will result in ACS c
128. is thereby changed to a visible developed image AC and DC negative bias voltages are applied to the Developing Roller thereby preventing toner from sticking to the background image portion A DC positive voltage is applied to the backside of the Transfer Belt 8 1st Image Transfer thereby allowing the visible developed image on the surface of each of the PC Drums C and to be transferred onto the Transfer Belt A DC positive voltage is applied to the backside of the paper thereby 9 2nd Image Transfer allowing the visible developed image on the surface of the Transfer Belt to be transferred onto the paper Theory of Operation Ver 1 0 Mar 2005 5 Image creation process 10 Paper Separation The paper which has undergone the 2nd image transfer process is neu tralized so that it can be properly separated from the Transfer Belt by the Paper Separator Claws Transfer Belt 11 Cleaning A charge is applied to the Transfer Belt By potential difference residual toner on the surface of the Transfer Belt is collected for cleaning 12 PC Drum Cleaning The residual toner left on the surface of the PC Drum is scraped off 13 Main Erase The surface of the PC Drum is irradiated with light which neutralizes any surface potential remaining on the surface of the PC Drum o re o a a 5 Image creation process Theory of Op
129. ition Date Service manual Ver Revision mark Descriptions of revision Theory of Operation Ver 1 0 Mar 2005 CONTENTS Outline 1 2 2 3 TYPOS of Paper siente nio einer ne eh eer i ag ds 4 2 4 Maintenance 2 5 Machine Specifications enter retener pe uos 4 2 6 Operating ennren nennen 5 2 7 Coritrollets tnr teen tan rere P 5 3 Center Cross section retener eei Ee de reso c e E 6 4 Paper pallia cent neo Pa Fed E d D ERE LUE 7 5 Image creation DFOC6SS e eno ctio et eth nr trt eR RE Cp ar eR FEE pha s 8 Composition Operation 6 Overall COMPOSIOM E 11 6 1 Timing chart at machine power up et 11 6 2 Control block diagram isisisi risiini iarrai 12 7 Scanner section IR 5 13 MEC Uuscuim 13 7 25 15 15 7 3 1 Scan and Exposure Lamp control 15 7 3 2 Original Size Detection control 17 8 Write section PH nnne nennen 20 8 1 Composition m LU MEN cum
130. itions Paper Cooling Fan Motor M26 Cooling Fan Motor 1 M24 OHP or OHP interleaves Turns at full speed if the machine interior temperature exceeds 16 when the Main Motor M1 is energized and the Exit Sen sor PC30 is activated Deenergized if the machine interior tem perature is 16 or less when the Main Motor M1 is energized and the Exit Sen sor PC30 is activated Turns at full speed for 10 sec after the Main Motor M1 has been deenergized if the Main Motor M1 is deenergized and the machine interior temperature exceeds 16 Deenergized when the Main Motor M1 is deenergized if the Main Motor M1 is deenergized and the machine interior temperature is 16 or less Mode other than above Turns at half speed when the Main Motor M1 is energized and the Exit Sensor PC30 is acti vated 1 Turns at half speed for 10 sec after the Main Motor M1 has been deenergized 1 1 Operation can be switched between full speed and half speed by selecting the Cooling Fan Speed function available from the Service Mode Turns at full speed when either the Main Motor M1 or Fusing Drive Motor M2 is energized urns at full speed for 30 sec after the Main Motor M1 and Fusing Drive Motor M2 have been deenergized and then turns at half speed Deenergized 30 sec after the above event Cooling Fan Motor 3 M25 Turns at full speed when either the Main Motor M1 or Fusing Drive Mot
131. leading to a risk of fire and electric shock o Fe 5 5 SAFETY AND IMPORTANT WARNING ITEMS Wiring NWARNING Never use multi plug adapters to plug multiple power cords in the same outlet If used the risk of fire exists When an extension cord is required use a specified one Current that can flow in the extension cord is limited so using a too long extension cord may result in fire Do not use an extension cable reel with the cable taken up Fire may result 2 Installation Requirements Prohibited Installation Places NWARNING Donot place the product near flammable materials or vola tile materials that may catch fire S A risk of fire exists Do not place the product a place exposed to water such as rain Q A risk of fire and electric shock exists When not Using the Product for a long time NWARNING When the product is not used over an extended period of time holidays etc switch it off and unplug the power cord Dust collected around the power plug and outlet may cause fire 5 6 SAFETY AND IMPORTANT WARNING ITEMS Ventilation N CAUTION The product generates ozone gas during operation but it will not be harmful to the human body If a bad smell of ozone is present in the following cases ventilate the room a When the product is use
132. ler Clutch CL3 Registration Roller 4037T2C542AA 84 Theory of Operation Ver 1 0 Mar 2005 19 Registration Roller section 19 3 Operation 19 3 1 Registration Roller control loop is formed in the paper between the Transport Roller and Registration Roller during the paper transportation to correct skewed paper feeding The amount of the paper loop can be adjusted using Loop Adjust of the Tech Rep mode The ON timing of the Inter mediate Transport Motor as the motor is restarted is varied by changing this setting This adjustment should be made when a tilted image is printed due to paper skew or a Z folded paper misfeed occurs at the Registration Roller Top Margin available from the Tech Rep mode should be adjusted based on the image writing start timing This adjustment should be made if the image on the copy deviates in the FD direction bizhub C450 Start Key ON Registration Registration Roller ON Roller ON Main Motor M1 Tray1 Paper Feed Clutch CL1 Intermediate Transport Motor M14 Registration Roller Clutch CL3 Registration Roller Sensor PC28 G e nu 9 G 7 fe E 9 4036ma2121c0 Registration Roller Transport Roller Loop 85 bizhub C450 i G g S Q e G 7 fe 19 Registration Roller section Theory of Operation V
133. lt leading to a risk of injury Take every care when servicing with the external cover detached High voltage exists around the drum unit A risk of elec IN tric shock exists Safety Checkpoints NWARNING Check the exterior and frame for edges burrs and other damage aD The user or CE may be injured Do not allow any metal parts such as clips staples and screws to fall into the product They can short internal circuits and cause electric shock du or fire Check wiring for squeezing and any other damage Current can leak leading to a risk of electric shock or aD fire Carefully remove all toner remnants and dust from electri cal parts and electrode units such as a charging corona unit Q Current can leak leading to a risk of product trouble or fire e Check high voltage cables and sheaths for any damage Current can leak leading to a risk of electric shock or fire J 5 8 SAFETY AND IMPORTANT WARNING ITEMS Safety Checkpoints NWARNING Check electrode units such as a charging corona unit for deterioration and sign of leakage Current can leak leading to a risk of trouble or fire Before disassembling or adjusting the write unit P H unit incorporating a laser make sure that the power cord has been disconnected The laser light can enter your eye leading to a risk of loss of eyesight D
134. m occurring there is Lifting Mylar installed before the 1st Image Transfer Roller K to help maintain a good nip width Belt Mylar Retraction do A 4036ma2163c0 1st Image Transfer Roller K Lifting Mylar V PC Drum K 4036ma2164c0 50 Theory of Operation Ver 1 0 Mar 2005 14 Transfer Corona section 14 3 3 2nd Image Transfer Roller pressure mechanism The machine is provided with a mechanism that presses the 2nd Image Transfer Roller up against and retracts it from the Transfer Belt to prevent the 2nd Image Transfer Roller from being dirtied due to patterns produced for purposes other than an actual copying operation which may be a pattern produced during the image stabilization sequence or other function bizhub C450 A Pressure retraction operation 1 Drive from the 2nd Image Transfer Pressure Retraction Motor is transmitted through a gear train to the drive gear 2 The rotation of the drive gear turns the pressure cam a half turn which pushes down the Pressure Lever This causes the 2nd Image Transfer Roller to be pressed up against the Transfer Belt 3 Atthis time the 2nd Image Transfer Pressure Retraction Sensor detects whether the 2nd Image Transfer Roller is located at the pressure position 4 When the motor is energized a second time the pressure cam turns another half turn This releases the Pressure Lever which moves the 2nd Image T
135. mber of sheets of paper to be fed into the tray If the Elevator Tray Upper Limit Sensor PQ PWB D FN is activated while paper is being fed into the tray the tray is lowered until the sensor is deactivated Paper removed Moves up to the upper limit posi If the Elevator Tray Paper Sensor PC8 FN is detected paper has been fed into tray from tray tion unblocked when paper is removed from the tray the tray is raised until the sensor is blocked Overload Moves down and then up after Lowers the tray for a given period of time then raises itto the upper limit position An overcurrent is detected in the Elevator Motor during this period 2nd paper exit tray Elevator Tray Paper Sensor PC8 FN Elevator Tray Upper Limit Sensor PQ PWB D FN Elevator Motor M7 FN 4853M022AE 21 FS 507 i G e S G 7 fe E 9 5 507 i G g S Q e G E fe oO 5 Operations 5 5 2 Theory of Operation Ver 1 0 Mar 2005 2nd paper exit tray shifting mechanism When in the offset mode the 2nd paper exit tray is moved to the front and rear by a motor to stack print sets in a sawtooth manner so that each print set is offset with respect to the others The Shift Home Position Sensor detects the 2nd paper exit tray at its home position Shift Motor M8 FN Sh
136. mechanism FS 603 The path along which the paper is transported is selected with the Entrance Switching Solenoid During a 2 sided print mode the solenoid is energized to feed the paper into the lower path and then feed it back to the main unit Ina 1 sided print mode and when 2 sided printed page is fed in the 2 sided print mode the Entrance Switching Solenoid is deenergized so that the paper can be trans ported to the Finisher 2 4583M001CA 4 L Entrance Switching Solenoid SL1 HO 4 iq Solenoid Energized i G e S G 7 fe E 5 EV ZS Solenoid Deenergized E 4583M501AA 5 Operation Theory of Operation Ver 1 0 Mar 2005 5 1 2 Finisher paper transport mechanism Drive from the Transport Motor turns the Transport Roller to transport paper fed from the main unit onto the Finisher The Transport Roller on the Finisher side is driven by the Transport Motor to feed the paper through the Finisher FS 603 5 4583M001CA Horizontal Unit side i G g S Q e G 7 fe oO Transport Roller 4853M003AB Transport Motor M1 FN Transport Roller 4643M007AD 10 Theory of Operation Ver 1 0 Mar 2005 5 Operation 5 2 Finishing tray mechanism 5 2 1 Paper stacking with finishing tray After the pa
137. mulation PostScript Emulation 3011 Scan Driver TWAIN driver Server Windows NT 4 0 2000 or Server 2003 OS Compatibility Windows 98 Second Edition Windows Me Windows Client 2000 Windows XP or Windows NT 4 0 SP6a MacOS 9 2 or later or MacOS X 10 2 or 10 3 Interface Standard Ethernet 10Base T or 100Base TX Optional USB 1 1 USB 2 0 or IEEE 1284 NOTE These specifications are subject to change without notice re o a a 3 Center cross section Theory of Operation Ver 1 0 Mar 2005 3 Center cross section o o a i N a 4037T1C501AA 7 1 CCD Unit 6 Multiple Bypass 2 Fusing Unit 7 Tray2 3 Imaging Unit K 8 Imaging Unit M 4 Imaging Unit C 9 Imaging Unit Y 5 Trayt 10 Transfer Belt Unit Theory of Operation Ver 1 0 Mar 2005 4 Paper path 4 Paper path o re o a 3 a 5 Image creation process Theory of Operation Ver 1 0 Mar 2005 5 Image creation process 1 Photoelectric Conversion Y 2 IR Image Processing o a 23 N a 10 Paper Separation 9 2nd Image Transfer 11 Transfer Belt Cleaning 8 1st Image Transfer ad 12 PC Drum Cleaning 4 PC Drum
138. n in this service manual may not coincide with the actual machine When any change has been made to the descriptions in the service manual a revised version will be issued with a revision mark added as required Revision mark To indicate clearly a section revised show to the left of the revised section A number within represents the number of times the revision has been made To indicate clearly a section revised show in the lower outside section of the correspond ing page A number within A represents the number of times the revision has been made NOTE Revision marks shown in a page are restricted only to the latest ones with the old ones deleted When page revised in Ver 2 0 has been changed in Ver 3 0 The revision marks for Ver 3 0 only are shown with those for Ver 2 0 deleted When page revised in Ver 2 0 has not been changed in Ver 3 0 The revision marks for Ver 2 0 are left as they are 2005 03 1 0 Issue of the first edition Date Service manual Ver Revision mark Descriptions of revision Theory of Operation Ver 1 0 Mar 2005 CONTENTS Outline 1 1 1 Document Feeder Automatic Nee FUNCIONS edendo fissi c Pec fodit 1 9 SVG 1 4 Paper feed prohibited originals ee 1 5 Paper feed not guaranteed originals 1 6 Mixed original feed nett nean 1 7 Machine specifications ee 1 8 Operating
139. n of the drive gear also turns the Agitating Blade of the Toner Cartridge to agitate toner in the Toner Car tridge B Toner replenishing control T C is detected when the Developing Clutch K CL2 is energized for K or when the Color Developing Motor M6 is energized for C M and Y during a copy cycle The actual reading of T C taken is compared with the T C setting made in TCR Level of Image Adjust available from the Tech Rep mode Based on this comparison the toner replenishing time is determined Since toner replenishing is possible only while the developer is being agitated the maxi mum toner replenishing time is fixed If it is not possible to replenish the supply of the required amount of toner within this maximum replenishing time the remainder time is stored in memory and added to the replenishing time for the next replenishing sequence 41 13 Toner Supply section Theory of Operation Ver 1 0 Mar 2005 13 3 2 Toner Near Empty and Toner Empty detection control Atoner near empty empty condition is detected by the Toner Near Empty Sensor PQ and LED mounted on each of the Toner Cartridges Atoner empty condition is detected by the TCR Sensor bizhub C450 Detection timing 1 The number of times is detected in which the sensor remains activated for a given period of time or more while the Agitating Blade turns one complete turn If this count reaches two a toner near empty condition is detected and the m
140. ng Call Tech Rep 4037 2 4 A different toner full warning screen is displayed if User is selected for Unit Change available from the Tech Rep mode 65 bizhub C450 s 2 S i 7 et 9 s et s 9 16 Paper feed section Theory of Operation Ver 1 0 Mar 2005 16 Paper feed section 5 16 1 Composition 5 16 1 1 1 dum N Tray1 Double Feed Sensor PC1 Tray1 Paper Take up Roller Tray1 Separator Roller 4037T2C557AA Tray1 Paper Feed Clutch CL1 Trayt Set Sensor PC14 Tray1 Double Feed Sensor PC1 Tray1 Paper Near Empty Sensor Tray1 Paper Empty Sensor PC2 PC13 i G g S Q e G 7 fe oO Tray1 Paper Take up Roller Tray1 Separator Roller Tray1 CD Paper Size Sensor PC3 4037 2 529 Tray1 Paper Size Board PWB 1I1 66 Theory of Operation Ver 1 0 Mar 2005 16 Paper feed section 16 1 2 Tray2 Tray2 Pick up Roller bizhub C450 Tray2 Separator Roller 4037T2C531AA Tray2 Vertical Transport Sensor PC108 Vertical Transport Roller 2 Tray2 Paper Take up Sensor PC107 s e S i 7 St 9 G et s 9 4037 2 530 2 104
141. nsport Mode Type Turnover Loop Turnover Mode Paper Exit U turn Turnover Switchback U Turn Turnover Mode only in 1 Sided Mode Installation Screw cramp to the main unit Document Alignment Center Document Loading Face up 1 2 Functions Standard Mode 1 Sided Mode 2 Sided Mode Modes Thick Paper Mode 1 Sided Mode Med Original Detection 1 Sided Mode 2 Sided Mode 1 3 Papertype 1 Sided Mode Standard Mode 35 to 128 g m 9 25 to 34 Ib Plain Paper 2 Sided Mode 50 to 110 g m 13 25 to 29 25 Ib of Document Thick Paper Mode 1 Sided Mode Plain Paper 129 to 210 g m 34 25 to 55 75 Ib Mixed Original Detection 1 Sided 2 Sided Mode Mode 2 Plain Paper 50 to 110 g m 13 25 to 29 25 Ib Detectable Document Metric area B6R to Size 1 Inch area 5 5 x 8 5R 5 5x8 5to 11 x 17 Document Feed Table 100 sheets Standard Mode Mixed 80 g m 21 25 Ib Original Detection Mode Original Exit Tray 100 sheets 80 g m 21 25 Ib Capacity Thick Paper Mode Document Feed Table 38 sheets 210 g m 55 75 Ib Original Exit Tray 38 sheets 210 g m 55 75 Ib 1 For the Combined Original Detection Mode Refer to the Mixed Original Detection Enabled Size Combination Table 1 Product specification Theory of Operation Ver 1 0 Mar 2005 1 4 Paper feed prohibited originals 5 e f fed trouble occurrence will be highly possible 5 Type
142. nstalled When Toner Cartridge is Installed Shutter 4036ma2517c0 4036ma2516c0 s S 7 St 9 s et s 9 43 bizhub C450 s amp S Q s s 9 14 Transfer Corona section Theory of Operation Ver 1 0 Mar 2005 14 Transfer Corona section 14 4 Composition 14 1 1 1st Image Transfer section e Paper Separator Claws 4037T2C573AA 4037T2C554AA 1st Image Transfer Roller M 1st Image Transfer Roller K 1st Image Transfer Roller Y 1st Image Transfer Roller C Cleaning Brush CO Transfer Belt Drive Roller 4037T2C520AA 1st Image Transfer Pressure Retraction Motor M11 x Pressure Cam 1st Image Transfer Retraction Position Sensor PC12 4037T2C521AA 44 Theory of Operation Ver 1 0 Mar 2005 14 Transfer Corona section 14 1 2 2nd Image Transfer section bizhub C450 Temperature Humidity Sensor PC7 4037T2C524AA 4037T2C555AA os 2nd Image Transfer Roller 4037T2C522AA 2nd Image Transfer Roller s 2 lt G et s 9 2nd Image Transfer Pressure Retraction Sensor PC29 2nd Image Transfer Pressure Retraction Motor M13 IDC Registration Sensor 2 PC9 Shutter IDC Registration Sensor 2 PC9 4037T2C523AA
143. o make up for the dis tance between the PC Drums of Y M C and K and adjusting the different speeds between the Scanner and the Write Section Stores the Y M C and K image data 12 13 Temporarily stores the image data output from the frame memory Corrects skew in the print position at 600 dpi to ensure correct alignment in the main scanning direction between each of the Y M C and K LPH assemblies and the PC Drums Corrects any deviation in the print start position in the main scanning direction that occurs when each of the Y M C and K LPH assemblies illuminates the surface of the corresponding PC Drum Expands the image data using the method opposite to that used in GBTC compres sion Discriminates the edges of text and line figures and according to the results of the area discrimination performs the Fine Edge Enhanced Technology FEET opera tion In order to prevent the gradation balance from changing interpolation converts the resolution only for the continuous gradation areas when resolution changes from 600 dpi to 1 800 dpi when using FEET Makes the necessary corrections so that the printed gradations have linear charac teristics since the image density of the input image data is not directly proportional to that of the printed image because of the changing developing and PC Drum characteristics Creates the density distribution of a predetermined pattern to enable outstanding gra
144. o not remove the cover of the write unit Do not supply power with the write unit shifted from the specified mount ing position The laser light can enter your eye leading to a risk of loss of eyesight When replacing a lithium battery replace it with a new lith ium battery specified in the Parts Guide Manual Dispose of the used lithium battery using the method specified by local authority Improper replacement can cause explosion After replacing a part to which AC voltage is applied e g optical lamp and fixing lamp be sure to check the installa tion state A risk of fire exists Check the interlock switch and actuator for loosening and check whether the interlock functions properly If the interlock does not function you may receive an electric shock or be injured when you insert your hand in the product e g for clearing paper jam Make sure the wiring cannot come into contact with sharp edges burrs or other pointed parts Current can leak leading to a risk of electric shock or fire 5 9 SAFETY AND IMPORTANT WARNING ITEMS Safety Checkpoints NWARNING Make sure that all screws components wiring connec tors etc that were removed for safety check and mainte nance have been reinstalled in the original location Pay Xpcs special attention to forgotten connectors pinched cables Q forgotten screws etc 7 A risk of product trouble elec
145. oO 5 Operations Theory of Operation Ver 1 0 Mar 2005 5 4 3 Staple sheet empty detection The Staple Empty Detecting Sensor is used to detect whether there is a staple sheet or not in the Staple Cartridge When there are about 20 staples left in the Staple Cartridge a staple sheet empty condi tion results and a staple empty display is given on the control panel of the main unit If a staple sheet empty condition is detected during a stapling sequence that particular sequence is continued until it is completed A staple empty display is then given After a new Staple Cartridge has been loaded the Stapling Motor is energized until the Self Priming Sensor detects loaded staples L thereby feeding the staple sheet to the stapling position Self Priming Sensor 1 2 Staple Empty Detecting Sensor 1 2 4853M021AA 20 Theory of Operation Ver 1 0 Mar 2005 5 5 2nd paper exit tray 5 Operations The 2nd paper exit tray moves up or down according to certain conditions The 2nd paper exit tray is moved up or down by the Elevator Motor that turns forward or Control The position at which the Elevator Tray Upper 5 5 1 2nd paper exit tray ascent descent mechanism backward Condition 2nd paper exit tray Standby Stationary at the upper limit posi tion Limit Sensor PQ PWB D FN detects the 2nd paper exit tray Paper fed into Lowers to the lower limit position tray depending on the nu
146. of inch sizes Mounting the optional sensor on a machine intended for the inch areas permits detection of metric sizes bizhub C450 Automatic Document Feeder 20 degrees Original Cover Angle Sensor 346 1 mm 313 5 mm Original Read Position 30 mm 4037T2C572AA Original Size Original Standard Position Detection Sensor FD1 Original Size Detection Sensor FD2 Option s 5 n 7 et 9 s et s 9 Exposure Unit 4037T2E597AA The Image Processing Board determines the original size based on the combination of detections made by the original size sensors and the CCD Anoriginal of an irregular size is rounded to the nearest standard size 17 7 Scanner section IR section Theory of Operation Ver 1 0 Mar 2005 Metric Area amp China Areas 1 Sensor CCD Width mm FD1 153 0 187 0 2000 2150 225 0 261 5 275 0 278 1 OFF A5R B5R 16KR A4R B5 B5 16k A4 ON FLS B4 8k A3 Table 2 Sensor CCD Width mm FD1 FD2 143 153 187 200 213 220 9 225 261 5 274 7 284 4 284 5 OFF OFF pos ASR BSR 16KR A4R ios B5 16K Letter A4 ON OFF FLS FLS FLS OFF ON ON ON B4 8K 11X
147. oint center stapling i G g S Q e G E fe oO 16 Theory of Operation Ver 1 0 Mar 2005 5 Operation 5 3 2 Staple unit moving mechanism When the Power Switch is turned ON or the Front Door is opened and closed the Staple Unit is moved to the front side with the forward rotation of the Slide Motor and stopped at the position where the Slide Home Position Sensor located at the bottom of the Staple Unit is blocked by the Light Shield Plate The Staple Unit is moved to the rear side with the backward rotation of the Slide Motor and stopped at its standby position This standby position is determined by the number of pulses input to the Slide Motor since it is a stepping type motor FS 603 Staple Unit Shield Plate G e n G 7 fe E 9 Rear Side 4583M619AA Slide Motor M8 FN 17 5 Operation Theory of Operation Ver 1 0 Mar 2005 5 3 3 Staple operation After the paper stacking and alignment operation on the Finishing Tray have been com pleted a stack of paper is taken up with the Upper and Lower Exit Rollers by moving the Swing Guide down with the Paddle Motor rotating in the reverse direction Stapling is performed by moving the Staple Unit according to the specified stapling posi tion However if stapling is made at one place at the rear side it is made at the stand by position without mo
148. oller temperature 155 C In standby state Heating Roller temperature 200 C 2 2 Fusing Pressure Roller temperature 145 C 6 Power Save 2 If the temperature of the Fusing Pressure Roller at the start of the warm up cycle is 60 C or less In standby state if the temperature of the Fusing Pres sure Roller exceeds 145 C after the warm up cycle has been completed 3 Heating Roller temperature 200 C gt 195 C 3 7 Fusing Pressure Roller temperature 145 C gt 155 C 3 3 If the temperature of the Fusing Pressure Roller at the start of the warm up cycle is 60 C or less In standby state During a copy cycle Heating Roller temperature 190 C 4 Fusing Pressure Roller temperature 145 C 4 4 For plain paper color copy 92 20 Fusing section Theory of Operation Ver 1 0 Mar 2005 A Warm up Four different types of warm up control are employed for varying the set temperature of each roller thereby preventing fusing performance from being degraded due to environ mental changes Priority is given to the high humidity control Warm up completed state Heating Roller Temperature Pressure Roller Temperature C Remarks First in the morning warm up completed Fusing Pressure Roller temperature is 60 or less 197 112 If a multi print cycle is run immediately after the warm up cycle has been com pleted the machine pro duces one printed page only an
149. om OFF after the Punch Axis turns 180 deg in the reverse direction The Punching operation for the second sheet of paper is made when the Punch Axis turns 180 deg in the forward direction 2 hole Off center Cam s 5 7 St 9 s et s 9 3 hole Off center Cam 4614t2c002aa 2 hole Off center Cam 2 hole Off center Cam 3 hole Off center Cam 3 hole Off center Cam 2holepunch 3 hole punch 4614t2c003aa 5 Operations Theory of Operation Ver 1 0 Mar 2005 5 2 Side registration operation The Side registration drive for the Punch Slide Unit is made by the Side Registration Motor The Home position of the Punch Slide Unit is detected with the Side Registration Home Position Sensor The Punch Slide Unit detects the trailing edge of the paper with the Trailing Edge Detec tion and the Side Registration Sensors and then moves to the position of the trailing edge according to the size of the paper And paper edge is detected by means the LED light emitted from LED Board and received by the Photo Sensor Board um x n n F x a P x 2 A Operation 1 1 Trailing Edge Detection Sensor detects paper leading edge 2 Side Registration Motor rotates 3 Punch Slide Unit moves toward front side Side Registration Home Position Sensor PI2P PK a 5 5 E 9
150. on Entrance Switching Solenoid SL4 Job Separator Exit Roller Job Separator Transport Roller 4653M004AA 4653M005AA p IKONICA MINOLTA SERVICE MANUAL FS 603 2005 03 KONICA MINOLTA BUSINESS TECHNOLOGIES INC Ver 1 0 After publication of this service manual the parts and mechanism may be subject to change for improvement of their performance Therefore the descriptions given in this service manual may not coincide with the actual machine When any change has been made to the descriptions in the service manual a revised version will be issued with a revision mark added as required Revision mark To indicate clearly a section revised show to the left of the revised section A number within represents the number of times the revision has been made To indicate clearly a section revised show in the lower outside section of the correspond ing page A number within A represents the number of times the revision has been made NOTE Revision marks shown in a page are restricted only to the latest ones with the old ones deleted When page revised in Ver 2 0 has been changed in Ver 3 0 The revision marks for Ver 3 0 only are shown with those for Ver 2 0 deleted When page revised in Ver 2 0 has not been changed in Ver 3 0 The revision marks for Ver 2 0 are left as they are 2005 03 1 0 Issue of the first edition
151. on Exposure Lamp FL201 ON Scanner Movement 4036ma2190c0 15 7 Scanner section IR section Theory of Operation Ver 1 0 Mar 2005 B When the Start key is pressed 1 The Exposure Lamp turns ON when the Start key is pressed 2 The gain adjustment is made when the Exposure Unit moves past the point under the shading sheet Thereafter a shading correction is made 3 The Exposure Unit starts a scan motion with the original position 4 After completing the scan motion for the original the Exposure Unit temporarily stops and the Exposure Lamp goes out 5 The Exposure Unit makes a return motion and stops at the home position Each of the R G and B data is stored in memory during a single scan motion The Expo sure Unit therefore makes only a single scan motion even for a multi copy cycle bizhub C450 Home Position Y Original Position 1 1 Exposure Lamp FL201 ON 1 Gain Adjustment and Shading Correction Scan 4036ma2191c0 i G g S Q e G 7 fe 16 Theory of Operation Ver 1 0 Mar 2005 7 Scanner section IR section 7 3 2 Original Size Detection control A Detection Method For detection of the original size the reflective size sensors detect the length of the orig inal while the CCD detects the length of the original Mounting the optional sensor on a machine intended for the metric areas permits detec tion
152. one The changes in gradation characteristics are caused by variations in the PC Drum sensitivity and developing characteristics and changes with time and in environment Patterns are produced on the surface of the Transfer Belt and the IDC Sensor detects the amount of toner sticking to them The Gamma correction data is calculated using the density measurements of different gradation levels The optimum LED intensity is set for each of the different gradation lev els G e ni G 7 fe E 9 22 3 Operation timing Mode Operation Timing Mode 1 Reset Stabilizer mode a new IU is detected a new Transfer Belt Unit is detected Mode 2 Stabilizer mode Left Door is opened and closed Front Door is opened and closed IU removed and reinstalled At the end of a print cycle making a given number of printed pages 1 Power Switch is turned ON at the end of a print cycle following reset from Sleep at the end of a print 3 cycle following an event in which the interior temperature upper limit threshold value is exceeded Mode 4 At the end of a print cycle making a given number of printed pages Mode 5 Gradation correction 1 Vg and Vdc are readjusted if the gamma correction data falls outside a predetermined range during the last image stabilization control 101 bizhub C450 i G g Q e G 7 fe
153. ontrol not necessarily functioning at the optimum performance This function works most effectively in the following conditions o re o a E a For the 2nd set of copies onward in electronic sorting S Printing using job programs Multiple Enlargement mode amp Paper Size Effecting monochrome printing in color mode Switching to monochrome mode 5 A4 Letter 3 sheets or less 4 sheets or more 8 A4R Letter R 2 sheets or less 3 sheets or more 5 B4 11 x 14 2 sheets or less 3 sheets or more 11 17 1 sheet or less 2 sheets or more Effecting monochrome printing in color mode effecting monochrome printing with the four PC Drums rotating Color print Monochrome print Color print PC Drum K AARAA 4 o 4 EN o0 d oeoe 00900 0000 v v wv Uu v v wv u uv wv u PC Drum Y 4036ma2241c0 Switching to monochrome mode Color print Monochrome print men G 0090 0090 v Vvu 4036ma2242c0 61 15 Toner Collecting section Theory of Operation Ver 1 0 Mar 2005 15 Toner Collecting section 15 1 Composition bizhub C450 IU Toner Collecting Screw 4037T2C556AA Waste Toner Bottle Transfer Belt Toner Collecting Screw 4037T2C527AA i G g S Q e G 7 fe 62
154. oper tolerances and safety factors For this reason unauthorized modifications involve a high risk of degradation in performance and safety Such modifications are therefore strictly prohibited the points listed below are not exhaustive but they illustrate the reason ing behind this policy Prohibited Actions N DANGER Using any cables or power cord not specified by KMBT Using any fuse or thermostat not specified by KMBT Safety will not be assured leading to a risk of fire and injury Disabling fuse functions or bridging fuse terminals with wire metal clips solder or similar object Disabling relay functions such as wedging paper between relay contacts Q 5 Disabling safety functions interlocks safety circuits etc Safety will not be assured leading to a risk of fire and S injury e Making any modification to the product unless instructed by KMBT S Using parts not specified by KMBT ilii S 2 SAFETY AND IMPORTANT WARNING ITEMS 2 POWER PLUG SELECTION In some countries or areas the power plug provided with the product may not fit wall outlet used in the area In that case it is obligation of customer engineer hereafter called the CE to attach appropriate power plug or power cord set in order to connect the product to the supply Power Cord Set or Power Plug NWARNING Use power supply cord set which meets the following criteria pro
155. opment The machine employs the two component non contact development system With the HMT method the magnetic developer brush does not rub against the surface of the PC Drum the images Accordingly sharper line images can be reproduced involv ing no uneven image density at the trailing edge or thin lines and achieving even finer reproduction of the solid image areas s 5 S Q s n s 9 Developing Roller PC Drum 4036ma2013c1 34 Theory of Operation Ver 1 0 Mar 2005 12 Developing section 12 3 5 Developer Scattering Preventive Mechanism To prevent the image and the machine interior from being dirtied the Toner Suction Fan Motor M20 and Toner Suction Fan Motor K M23 are incorporated to trap toner parti cles rising up inside the machine bizhub C450 Path for drawing toner particles in IU Y M 4 Path for drawing toner particles in IU K IU Y 4037T2E608AA A IU YMC ForlU YMC a filter is installed behind the IU and toner particles are trapped by the Toner Suction Fan Motor during development G e n i G 7 fe 9 Holder Filter Holder 4037T2C590AA 35 12 Developing section Theory of Operation Ver 1 0 Mar 2005 B IU K The system speed is high in the monochrome print mode and scattering developer can af not be
156. optical sensor is used to detect waste toner When the sensor is blocked for a given period of time the machine determines that the Waste Toner Bottle is nearly full of waste toner Atthis time a corresponding warning near full warning is given on the control panel To prevent false detection an Agitation Screw is mounted in the Waste Toner Bottle so that the waste toner is accumulated in the bottle evenly B Waste toner full detection control Atthe same time that the waste toner near full condition has been detected the counter exclusive for the waste toner inside of the machine starts counting When the counter reaches about 8k the machine determines that the Waste Toner Bottle is full and stops operation Counting method of the counter exclusive for the waste toner is corrected to count the value appropriately according to the color or monochrome mode or paper length After the Waste Toner Bottle has been replaced and the Waste Toner Full Sensor has been unblocked for a given period of time the machine cancels the copying disabled condition while at the same time automatically clearing the counter exclusive for the waste toner Waste Toner Bottle Waste Toner Full Sensor PC31 Agitating Screw 4036ma2028c1 4036ma2524c0 Near Full Condition Warning Display Before Near Full Condition Near Full Condition is Detected Detected gt Moaemaaiezo Waste Toner Waste Toner Box needs replaci
157. or M2 is energized Turns at full speed for 30 sec after the Main Motor M1 and Fusing Drive Motor M2 have been deenergized and then turns at half speed Deenergized 30 sec after the above event Scanner Cooling Fan Motor M202 Turns at full speed while the Exposure Lamp FL201 remains ON MFP Control Board Cooling Fan Motor M27 Turns at full speed while the power remains ON 110 Theory of Operation Ver 1 0 Mar 2005 24 Other control 24 2 Parts Operated When the Power Switch and Auxiliary Power Button are turned ON 24 2 1 Parts operated when the Power Switch and Auxiliary Power Button are turned ON When the Auxiliary Power Button is turned ON the Control Board detects it and sends a control signal to the DC Power Supply The DC Power Supply then supplies 3 3V DC 5V DC 15V DC and 24V DC to all PWBs and options It also turns ON the relays in the PWBs supplying AC power to each of the heater lamps bizhub C450 Auxiliary Power Button G e G 7 fe 9 5VDC 12VDC 24VDC PWB MFPC PWB LED 4037T2C582AA 111 bizhub C450 i G g S Q e G 7 fe oO 24 Other control 24 3 Counter control 24 3 1 Construction Theory of Operation Ver 1 0 Mar 2005 PWB MFPC Total Counter Electronic Counter
158. ot remove caution labels If any caution label has come off or soiled and therefore the caution cannot be read contact our Service Office S 16 IKONICA MINOLTA SERVICE MANUAL THEORY OF OPERATION bizhub Main Unit 2005 03 KONICA MINOLTA BUSINESS TECHNOLOGIES INC Ver 1 0 After publication of this service manual the parts and mechanism may be subject to change for improvement of their performance Therefore the descriptions given in this service manual may not coincide with the actual machine When any change has been made to the descriptions in the service manual a revised version will be issued with a revision mark added as required Revision mark To indicate clearly a section revised show to the left of the revised section A number within represents the number of times the revision has been made To indicate clearly a section revised show in the lower outside section of the correspond ing page A number within A represents the number of times the revision has been made NOTE Revision marks shown in a page are restricted only to the latest ones with the old ones deleted When a page revised in Ver 2 0 has been changed in Ver 3 0 The revision marks for Ver 3 0 only are shown with those for Ver 2 0 deleted When page revised in Ver 2 0 has not been changed in Ver 3 0 The revision marks for Ver 2 0 are left as they are 2005 03 1 0 Issue of the first ed
159. per has been fed through the Exit Roller the paper drops onto the Finishing Tray Then the Paddle taps the top of the paper twice once for the additional sheets so that the trailing edge of the paper reaches the Finishing Tray Stopper After Paddle operation is finished Swing Guide will be lowered to prevent curling of paper The Paddle Motor provides the drive for the Paddle and Its home position is detected with the Paddle Home Position Sensor FS 603 Paper Aligning Plate Exit Roller Paddle Upper Exit Roller Swing Guide Finishing Tray Stopper G e g G 7 fe 9 1st Paper Exit Tray Paper Exit Belt Lower Exit Roller 4583M614AA 11 5 Operation Theory of Operation Ver 1 0 Mar 2005 5 2 2 Aligning mechanism Two Aligning Plates are moved by drive of the Front or Rear Aligning Motor in the for ward or reverse direction The Aligning Plates home position is detected with the Front or Rear Aligning Plate Home Position Sensor With reference to this home position the amount of movement of the Aligning Plate is determined FS 603 Rear Aligning Plate Rear Aligning Plate Home Position Sensor PI5 FN Shield Plate 2 Front Aligning Motor M4 FN d Rear Aligning Motor She SA 5 Front Aligning Plate LI A e Front Side Shield Plate Front Aligning Plate Home Position Sensor PI4 FN 4
160. pper Paddle Motor M15 FN Exit Motor M3 FN Storage Roller Rolls Spacing Motor M12 FN des MG DAR Theory of Operation Ver 1 0 Mar 2005 4 Drive A Horizontal Transport Entrance Switching Solenoid SL1 HO Turnover Empty Detecting Sensor PC6 HO FS 507 4853M004AA Horizontal Unit Door Sensor PC4 HO G e G 7 fe E 9 Paper Sensor PC1 HO 5 Operations Theory of Operation Ver 1 0 Mar 2005 5 Operations 5 1 Horizontal transport unit 5 1 1 Paper transport mechanism FS 507 A Paper path switching mechanism The paper fed from the main unit moves through either one of the two different paper paths A solenoid is used to select the paper path For switchback sequence during 2 sided printing Solenoid energized For transport onto the Finisher Solenoid deenergized Turnover Empty Sensor PC6 HO SL1 Energized AN SL1 Deenergized n i G g S Q e G 7 fe oO 4853M501AA B Finisher paper transport mechanism A motor is employed to transport paper onto the Finisher The Paper Sensor functions to detect a sheet of paper present in the Horizontal Trans port Unit Paper Sensor PC1 HO Entrance Motor M1 FN 4853M003AB Theory of Operation Ver 1 0 Mar 2005 5 2 Paper transport 5 2 1 Paper transport mech
161. r OFF ON ON OFF L H Letter R OFF OFF OFF ON L H Legal 5 ON ON ON ON L L Invoice R 5 ON OFF OFF H H 11x17 9 OFF OFF OFF OFF L H FLS 8 x 13 8 OFF OFF OFF OFF L H Fin 5 OFF OFF OFF OFF L H 8 1 2 x 18 8 OFF OFF OFF OFF L H FLS 3 OFF ON ON ON H H K16 OFF OFF ON OFF H H K8 1 Metric Area only 2 Inch Area only 8 Detected if selected using FLS Paper available from Tech Rep mode Tray2 Paper Size Board PWB I2 4036ma2043c1 74 Theory of Operation Ver 1 0 Mar 2005 16 Paper feed section 16 3 8 Tray2 paper lifting motion control A When Tray2 is slid in The paper lifting motion is started if the Tray2 Lift up Sensor is unblocked with Tray2 slid in the machine When the Tray2 Lift up Sensor is blocked after the paper lifting motion has been started the motor is deenergized bizhub C450 Tray2 Lift up Motor M101 Tray2 Lift up Sensor PC105 4036 223200 4036ma2607c0 Tray2 Slid in Lifting Completed G e l G 7 E 9 Tray2 Set Sensor PC103 Tray2 Lift up Sensor PC105 Tray2 Lift up Motor M101 4036ma2231c0 B During a copy cycle As paper is consumed the Paper
162. r are properly aligned and stapled together on the Finisher Tray before being fed out into the 2nd paper exit tray FS 507 Finisher Tray 2nd paper exit tray N NN G e g G 7 fe E 5 4853M016AA 15 5 Operations Theory of Operation Ver 1 0 Mar 2005 5 3 1 Paper aligning mechanism The Aligning Plate is moved and the Paddles are turned to align paper correctly for sta pling A Aligning plate The Aligning Plate is moved to align the paper in the crosswise direction with reference to the center position of the Finisher Tray The Aligning Plate is moved as the CD Aligning Motor turns forward or backward The CD Aligning Home Position Sensor detects the Aligning Plate at its home position The movement of the Aligning Plate is determined with this home position used as the reference The movement of the plate is varied depending on the width of the paper FS 507 Aligning Plate Aligning Plate i G g S Q e G E fe oO 4853M017AA CD Aligning Home Position Sensor PC9 FN CD Aligning Motor M5 FN Finisher Tray 16 Theory of Operation Ver 1 0 Mar 2005 5 Operations B Paddles The Upper and Lower Paddles are turned to align the paper in the feeding direction The Upper Paddles are turned by the Upper Paddle Motor and
163. r is transported onto the Finisher Tray Either the upper paper path or lower paper path is used to transport paper onto the Finisher Tray The upper paper path is selected when the Upper Lower Entrance Switching Solenoid is energized while the 1st paper exit tray Entrance Switching Solenoid is deenergized The lower paper path is selected when the Upper Lower Entrance Switching Solenoid is deenergized Lower Entrance Motor M2 FN Finisher Tray Storage Roller Lower Path Transport Roller Exit Motor M3 FN Z 4853M009AG 1st Tray Entrance Switching Solenoid SL2 FN Upper Lower Entrance Switching Solenoid SL1 FN 11 FS 507 G e S G 7 fe E 5 5 507 Composition Operation 5 Operations Theory of Operation Ver 1 0 Mar 2005 D 2nd paper exit tray paper transport mechanism Paper transport to the 2nd paper exit tray takes place when the Finisher is in the Sort or Group mode As the motor is energized the Exit Roller turns to transport the paper into the 2nd paper exit tray Either the upper paper path or lower paper path is used to transport paper onto the 2nd paper exit tray The upper paper path is selected when the Upper Lower Entrance Switching Solenoid is energized while the 1st Tray Entrance Switching Solenoid is deenergized The lower paper path is selected when the Upper Lower Entrance Switching Solenoid is deenergi
164. r registration or color shift is therefore more likely to occur due to each of the LED assemblies being out of correct position The color shift correction system automatically detects any misalignment among the different colors correcting it both in the main scanning and sub scanning directions bizhub C450 The color shift detection sequence proceeds as follows A detection pattern each in the sub scanning direction is produced at the front and rear on the Transfer Belt Each of IDC Registration Sensor 1 and 2 at the front and rear reads the corresponding pattern The amount of color shift in the sub scanning direction is then calculated and stored in memory A detection pattern each in the main scanning direction is next produced at the front and rear on the Transfer Belt Each of IDC Registration Sensor 1 and 2 at the front and rear reads the corresponding pattern The amount of color shift in the main scanning direction is then calculated and stored in memory Based on the data representing the amounts of color shift the machine calculates how much each of the different colors should be corrected The correction data is further stored in memory Based on the data stored in memory the machine controls each dot during production of image outputs thereby correcting the color shift varying the timing at which the LED is turned ON The color shift correction is made when the Left Door is opened and closed the Transfer Belt is removed and
165. r rrt reni tn re ner rn ha e Ce eh in nns 47 14 3 1 Transfer Belt speed 47 14 3 2 1st Image Transfer Roller mechanism pe 48 14 3 3 2nd Image Transfer Roller pressure mechanism 51 14 3 4 IDC Sensor Shutter mechanism essen 52 14 3 5 ATVC Auto Transfer Voltage Control 538 Theory of Operation Ver 1 0 Mar 2005 14 3 6 Transfer Belt cleaning eese nennen nnne 55 14 3 7 Transfer Belt Filming Cleaning Mechanism esee 56 14 3 8 2nd Image Transfer Roller cleaning pe 58 14 3 9 Charge neutralization and separation 59 14 3 10 Detection of New Transfer Belt 60 14 3 11 ACS Control nne air tee 61 15 Toner Collecting 62 NOs COMPOSINOM erp ee 62 15 2 63 15 3 OpSrati lls ae fenetre reet trier lote ES ato Fla E Feu tar ERI EE 64 15 3 1 Toner collecting 64 15 3 2 Waste Toner Bottle in position 64 15 3 8 Waste Toner Near Full Full detection 65 16 Paper feed section eren enean reni enit tenet P tens 66
166. ra So 13 o o Q 2 bizhub C450 2 Color correction processing reflection density conversion masking UCR BP h Image area discrimination 9 Miscellaneous processing improved reproduction of black text edge emphasis edge expansion smoothing color balance and gamma correction 4 Multiple values Photo mode 4 Error diffusion binary EU EUR SERE mode other than Photo 5 GBTC compression 6 Input buffer memory Copier Board 7 JBIG compression 8 File code memory 7 Standard 256 MB i G e g G 7 fe E 9 Extended memory 256 MB option HDD 40 G option 9 JBIG expansion Electronic sorting Board 11 Frame memory 10 Memory access coordina lt Standard 192MB 12 Output buffer memory 13 600 dpi color shift skew correction MFP Control Board i 16 Area discrimination FEET 14 CD position correction i i 17 Interpolation 15 GBTC expansion i 18 Gamma correction 19 Screening To LED Drive Board 105 bizhub C450 i G g S Q e G 7 fe oO 23 Image processing Theory of Operation Ver 1
167. ransfer Roller to and stops it at the retracted position 2nd Image Transfer Pressure Retraction Sensor PC29 2nd Image Transfer Pressure Retraction Motor M13 s 2 S i 7 St 9 G et s 9 2nd Image Transfer Roller 4036ma2519c0 Drive Rolle 2nd Image Transfer Roller C Cam 4036ma2168c0 40a6ma202ao1 51 14 Transfer Corona section Theory of Operation Ver 1 0 Mar 2005 Operation Timing Start Key ON Paper moves past 2nd Image Transfer Roller Main Motor M1 2nd Image Transfer Pressure bizhub C450 Retraction Motor M13 2nd Image Transfer Pressure Retraction Sensor PC29 4036ma2170c0 14 3 4 IDC Sensor Shutter mechanism The IDC Sensor can be contaminated with toner since it is located under the Transfer Belt There is a shutter mechanism provided for the sensor to prevent it from being con taminated The shutter opens and closes in synchronism with the pressure and retraction motion of the 2nd Image Transfer Roller When the 2nd Image Transfer Roller is retracted from the Transfer Belt the Pressure Pin pushes the Shutter Holder This moves the Shutter at the i 5 IDC Sensor to the front side When the 2nd Image Transfer Roller is pressed against the Transfer Belt on the other hand the Shutter of the IDC Sensor is moved by a spring force to the rear side and
168. ransport Motor Forward Rotation The original is transported to the switchback section Transport Motor OFF after the original leaves from the Transport Belt Exit Motor OFF after passing a specified time from Turnover Sensor OFF Exit Motor Backward Rotation The original is transported to the Exit Roller The rotation speed of the Exit Motor is reduced before the Exit Sensor goes OFF The original is ejected on the Exit Tray with lower speed Exit Motor OFF B Document exit motion in 2 sided mode Exit Solenoid ON Exit Motor Forward Rotation Transport Motor Forward Rotation The original is transported to the exit section Transport Motor OFF after the original leaves from the Transport Belt Sensor OFF Exit Solenoid OFF after passing a specified time The rotation speed of the Exit Motor is reduced before the Exit Sensor goes OFF The original is ejected on the Exit Tray with lower speed Exit Motor OFF 11 Document Feeder Automatic G e S G 7 fe E 9 5 Operation Theory of Operation Ver 1 0 Mar 2005 5 4 Turnover mechanism 2 sided mode n the 2 Sided Mode an original which has its 1st side scanned is turned over and then transported to the scan position again for the 2nd side scanning Turnover Gate Document Feeder Automatic Turnover Solenoid SL1 DF Exit Motor
169. reinstalled the IU is removed and reinstalled the Power Switch is turned OFF and ON or an image stabilization sequence is carried out from the control panel i G g S Q e G 7 fe el EE ETE os Detection Pattern for Sub Detection Pattern for Main Scanning Direction Scanning Direction X AIL eee INAH E NIS ISPINI SENI Transfer Belt gt ia lt ssss MU SSS 4036ma222600 IDC Registration Sensor 1 and 2 PC8 and 9 22 Theory of Operation Ver 1 0 Mar 2005 9 Imaging Unit section IU section 9 Imaging Unit section IU section 9 1 Composition bizhub C450 PC Drum y M K 4037T2C505AA 4037T2C552AA PC Drum Y M C K Cleaning Blade Toner Collecting Screw PC Drum Charge Corona s E n 7 St 9 G et s 9 Developing Unit IY Main Erase Lamp Y M C K LA1 to LA4 4037T2C506AA 23 9 Imaging Unit section IU section Theory of Operation Ver 1 0 Mar 2005 9 2 Drive x K PC Motor 7 S N ES a Developing Clutch K CL2 Color PC Drum Motor M5 Color Developing Motor M6 4037T2C508AA i G g S Q e G
170. removed if the same mechanism as that incorporated in the IU YMC is used A new fan motor and a new filter with a large capacity are installed instead of the filter orig 2 inally installed the IU K Developer scattering during developing is thereby sup Toner Suction Fan Motor K M23 Dustproof Filter 2 S 4037T2C589AA 9 2 54 7 Q f 36 Theory of Operation Ver 1 0 Mar 2005 12 Developing section 12 3 6 TCR Sensor control The TCR Sensor is mounted on the underside of each of the Developing Sections The sensor for C M and Y is an optical type while that for K is a magnetic type Each of these sensors detects toner to carrier ratio T C of the developer The reading is used for determining the amount of toner supplied Only when a new Imaging Unit is installed in the machine an automatic adjustment is made of each of these TCR Sensors The sensors cannot be adjusted manually The target T C is 8 95 both for color and K This T C can however be changed using TCR Level of Image Adjust available from the Tech Rep mode bizhub C450 A Optical TCR sensor Abias is applied to the TCR Sensor window to prevent toner from sticking to it There is a magnetic brush provided for the Conveying Screw portion to clean the surface of the window The sensor portion is separated from the Developing Section Imaging Unit When the TCR Sensor i
171. revision marks for Ver 2 0 are left as they are 2005 03 1 0 Issue of the first edition Date Service manual Ver Revision mark Descriptions of revision Theory of Operation Ver 1 0 Mar 2005 CONTENTS i Outline 1 o 14 2 lt 1 153 Machine Specifications cerner rendi ri en sen 1 1 4 Operating environment seisin issiria nnne nennen nennen 1 2 Paper Feed Path Composition Operation 3 p 3 4 DiI 6 4 4 1 Switchback Drive 4 4 2 Transport Drive 4 5 CPS ATION TEE 5 5 1 Switchback mechanism 5 E 5 1 1 Switchback operation nennen nnne 5 E 5 1 2 Paper exit roller drive coupling mechanism eene 5 5 1 3 Switchback Motor Control rennen 5 5 2 Transport Control icio rire rcr ELE GR ED 6 5 2 1 Duplex Unit Transport Motor Control 6 5 2 2 2 sided printing method od rcr ti E eR nna E 6 Theory of Operation Ver 1 0 Mar 2005 xejdng oneuioiny euiino uoneJedo uonisoduo5 Blank Page Theory of Operation Ver 1 0 Mar 2005 1 Product specifications Outline z gp o 1
172. rom the Shift Motor is stopped The Lower limit position of the 1st Paper Exit Tray is detected with the Shift Lower Limit Sensor When the Shift Lower Limit Sensor is turned ON downward movement drive from the Shift Motor is stopped The Stack Full Sensor detects if an excessive amount of stacking is made due to the height of the stacked paper of large sizes or of mixed sizes FS 603 G e n G 7 fe 9 Shift Upper Limit Sensor PlI15 FN Exit Tray Sensor PI8 FN KE Exit Tray Home Position Sensor PI9 FN Shift Lower Limit Sensor PlI16 FN Edge Shift Motor Clock Sensor PI17 FN 1st Paper Exit Tray 77 N lt AR lt u NIF Z AS WS Stack Full Sensor PI24 FN Shift Motor M6 FN 4583M625AA 21 5 Operation Theory of Operation Ver 1 0 Mar 2005 5 4 Center Staple amp Fold Section 5 4 1 2nd paper Exit Tray The 2nd Paper Exit Tray is fixed and all the paper stacked as a booklet is exited onto this Tray The Saddle Tray Sensor detects if the paper is stacked on the 2nd Paper Exit Tray but does not detect a paper jam FS 603 2nd Paper Exit Tray Paper Stopper Sg 5 S nd Q 2 E s 9 p 4583M638AA Saddle Tray Sensor PI13 FN Paper Hold Plate 22 Theory of Operation Ver 1
173. s replaced it is necessary to replace the Imaging Unit with a new one This represents the fact that the TCR Sensor is adjusted only when a new Imaging Unit is installed In addition if the LPH Unit is to be replaced it is necessary to remove the TCR Sensor from the old LPH Unit and mounted it in the new LPH Unit B Magnetic TCR Sensor The magnetic permeability powder density of the carrier in the developer is measured to determine the T C mylar is provided for the Conveying Screw portion to scrape toner off the surface of the TCR Sensor The TCR Sensor is integrated with the Imaging Unit When the TCR Sensor is to be replaced with a new one the entire Imaging Unit must be replaced s 2 7 Q 9 s et s 9 TCR Sensor Y M C TCR Sensor K Optical TCR Sensor Magnetic TCR Sensor 4036 250400 Magnetic Brush TCR Sensor Window TCR Sensor C M Y TCR Sensor K PWB N1 N2 N3 4036ma2187c0 L 4036ma2188c0 37 12 Developing section Theory of Operation Ver 1 0 Mar 2005 C TCR window bias Since the optical TCR Sensor is used for C M and Y a bias is applied to the TCR win dow to prevent toner from sticking to it No bias is applied to the TCR Sensor for K which is the magnetic type The bias is applied from the bias terminal of the LED Unit by way of the mounting screw of the TCR window to the TCR window
174. sition Switch are employed to move the lock holder as necessary to select the hole positions 2 or 3 holes FS 507 2 holes Punch Bars in Locked Position Lock Holder Hole Punch Position Switch S4 i G g Q e G E fe Hole Position Selector Motor M14 Punch Bars Locked Position 3 holes 4643M015AA 24 p IKONICA MINOLTA SERVICE MANUAL JS 601 2005 03 KONICA MINOLTA BUSINESS TECHNOLOGIES INC Ver 1 0 After publication of this service manual the parts and mechanism may be subject to change for improvement of their performance Therefore the descriptions given in this service manual may not coincide with the actual machine When any change has been made to the descriptions in the service manual a revised version will be issued with a revision mark added as required Revision mark To indicate clearly a section revised show to the left of the revised section A number within represents the number of times the revision has been made To indicate clearly a section revised show in the lower outside section of the correspond ing page A number within A represents the number of times the revision has been made NOTE Revision marks shown in a page are restricted only to the latest ones with the old ones deleted When page revised in Ver 2 0 has been changed in Ver 3 0 T
175. sor PC115 Bypass Paper Feed Clutch CL101 Tray2 Vertical Transport Sensor PC108 4036ma2123c0 17 3 2 Paper Empty detection The Bypass Paper Empty Sensor detects paper empty condition in the Bypass Sec tion Bypass Paper Empty Sensor PC110 d 4036ma2530c0 79 bizhub C450 i G e ni G 7 fe E 9 17 Bypass section Theory of Operation Ver 1 0 Mar 2005 17 3 3 Bypass Paper Lifting Motion Control Atthe start of a Bypass paper take up sequence the Bypass Paper Pick up Solenoid is energized to raise the Paper Lifting Plate so that the sheet of paper can be taken up When the print cycle is completed the Bypass Paper Pick up Solenoid is energized again to return the Paper Lifting Plate to the standby position bizhub C450 Bypass Paper Bypass Lift up Take up Roller Sensor PC115 Bypass Paper Pick up 8 I Solenoid SL101 4036ma2126c0 4036 253100 Bypass Lift up Sensor PC115 s 5 S S Q s s 9 4036ma2236c0 Paper Lifting Plate Start Key ON Paper Fed out Tray2 Vertical Transport Motor M103 Bypass Paper Pick up Solenoid SL101 Bypass Paper Feed Clutch CL101 Bypass Lift up Sensor PC115 4036 223500 80 Theory of Operation Ver 1 0 Mar 2005 17 Bypass sec
176. t of paper completes a switchback sequence during a multi print cycle in the Sort Staple mode If however paper measures 217 mm or more in the FD direction the leading edge of the second sheet of paper reaches the Storage Roller before the roller stops turning The Storage Roller is therefore raised up to allow a given clearance from the Storage Rolls The Storage Roller is spaced from the Storage Rolls as a cam is turned by the corre sponding motor FS 507 B Exit roller rolls spacing mechanism Paper needs to be temporarily transported to the Finisher Tray in the Staple mode which makes it necessary to raise the Exit Rolls to provide a given clearance from the Exit Roller After the stapling sequence has been completed the Exit Rolls are lowered and pressed against the Exit Roller so that the paper can be fed out The Exit Rolls are spaced from the Exit Roller as a lever is moved to the right and left by the cam which is rotated by the motor Exit Roller Rolls Spacing Motor M13 FN N N G g S Q e G 7 fe oO Storage Roller Home Position amp 1 Sensor PC12 FN Ne TA Q am d fos a Storage Roller Rolls Spacing Motor M12 FN Exit Roller Home Position Sensor PC13 FN 4853M013AE Exit Rolls 4853M033AD 14 Theory of Operation Ver 1 0 Mar 2005 5 Operations 5 3 Finisher tray Sheets of pape
177. t of paper completes when the Punch Home Position Sensor is switched ON from OFF after the Punch Axis turns 180 deg in the for ward direction The Punching operation for the second sheet of paper is made when the Punch Axis turns 180 deg in the reverse direction 1 Punch Axis Stops at Home Position 2 Punch Axis rotates by 90 deg in forward direction and punch holes are made 3 Punch Axis rotates by another 90 deg in forward direction and punch operation is completed Punch Home Position Sensor 1 Detection gap Off Center Cam ARS E Bac Dyes mcd Punch Dyes 461412 004 Theory of Operation Ver 1 0 Mar 2005 5 Operations 5 1 2 2 3 holes punch Switch the number of punch holes between 2 and 3 by changing the rotating direction of the punch Motor The punch control is the same with the one for 4 Punch holes 2 holes punch The Punching operation for the first sheet of paper completes when the Punch Home Position Sensor is switched ON from OFF after the Punch Axis turns 180 deg in the for ward direction The Punching operation for the second sheet of paper is made when the Punch Axis turns 180 deg in the reverse direction PK 501 PK 4 PK 131 B 3 holes punch The Punching operation for the first sheet of paper completes when the Punch Home Position Sensor is switched ON fr
178. tanding Document Alignment Center Supplies Staple Cartridge 1 2 Functions Modes Normal Group Sort Group Offset Sort Offset Sort Staple Center Staple amp Fold Punch Option Group Punch Sort Punch Group Offset Punch Sort Offset Punch Sort Staple Punch 1 3 Papertype Remove the finisher off the Copier for feeding the long paper The maximum loading capacity shown is for when loading the single type of paper 80g m 1 3 1 Group Group offset Plain Paper Paper Size Weight Tray Capacity 1 Exit Tray No of Sheets to be Stapled B5R B5 to 60 to 90 B4 1st paper 1 2 8 5x11R 8 5x14 or HS g m orsmaller larger exit tray 5 5x8 5RV 16 to 24 Ib No of 5 5 x 8 5 Sheet 1000 500 to Height 150mm 75mm Envelop 12 25 x 18 60 to 256 20 sheet OHP Film g m Label Paper 16 to 68 Ib Thick Paper 1 Controlled by whichever reached earlier 1 3 2 Sort Sort offset Paper Type Paper Size Weight Tray Capacity Exit Tray of Sheets to be Stapled Plain Paper A5 B5R B5 to 60 to 90 4 151 2 8 5x11R 8 5x14 or i 8 5 x 14R g m orsmaller larger exit tray 85x11 16 to 24 Ib No of to Sheets 1000 500 11x17 Height 150 mm 75 mm Controlled by whichever reached earlier e e o CD 1 Product specification Theory of Operation Ver 1
179. tation from Main Body Output to 1st Paper Exit Tray zi 4583t1c001aa Theory of Operation Ver 1 0 Mar 2005 2 2 Output the 2nd paper exit tray 2 Paper Feed Path Aligning Paper stack Transports to the Finishing tray Transportation from Main Body Transports to the center staple position Output to 2nd Paper Exit Tray 4583t1c002aa Transports to the folding position e e o 2 Paper Feed Path Theory of Operation Ver 1 0 Mar 2005 CD Blank Page Theory of Operation Ver 1 0 Mar 2005 3 Composition Composition Operation 3 Composition Punch section Option Transport section Finishing tray Exit tray section Staple Section 4583t2c001aa FS 603 s 2 7 20 9 s et s 9 4 Drive Theory of Operation Ver 1 0 Mar 2005 4 Drive Transport Motor M1 FN Entrance Motor M9 FN FS 603 Paddle Motor M2 FN Staple Folding Motor M7 FN Exit Motor M3 FN Slide Motor M8 FN i G g S Q e G 7 fe Shift Motor M6 FN 4583t2c002aa Rear Aligning Motor M5 FN Front Aligning Motor M4 FN Theory of Operation Ver 1 0 Mar 2005 5 Operation 5 Operation 5 1 Transport Section 5 1 1 Paper path switching
180. the revision has been made To indicate clearly a section revised show in the lower outside section of the correspond ing page A number within A represents the number of times the revision has been made NOTE Revision marks shown in a page are restricted only to the latest ones with the old ones deleted When page revised in Ver 2 0 has been changed in Ver 3 0 The revision marks for Ver 3 0 only are shown with those for Ver 2 0 deleted When page revised in Ver 2 0 has not been changed in Ver 3 0 The revision marks for Ver 2 0 are left as they are 2005 03 1 0 Issue of the first edition Date Service manual Ver Revision mark Descriptions of revision Theory of Operation Ver 1 0 Mar 2005 CONTENTS N Outline 3 1 Product specification 1 n 1 1 ELSE loui HEREDES 1 1 9 Machine specifications cnr morena cerei rea mo ir e ser 1 1 4 Operating environment essen enne nnne nennen nennen 1 2 Paper Feed Path Composition Operation 3 COMPOSIIOM m 3 4 p 4 5 aiii nh D DERE EE tree creer riper reer Teeter GUERRE reer rrr 5 E 5 1 Paper Feed Section 5 5 1 1 Paper Feed drive mechanism eene ener enne 5 5 2 Section E 5 2 1 Elevator tray mechanism eese eene tnnt enne 6 E 5 2 2 Shift Gate drive m
181. tion 17 3 4 Paper size detection The size of the paper loaded in the Bypass Section is detected by the combination of ON or OFF positions of the four Bypass FD Paper Size Sensors and the Bypass Paper Size Unit Moving the Paper Guide varies the resistance value of the Bypass Paper Size Unit VR 3 des N Metric Area a Bypass FD Bypass FD Bypass FD Bypass FD Bypass Paper Size Paper Size Paper Size Paper Size Paper Size Unit VR1 Paper Size Sensor 1 Sensor 2 Sensor 3 Sensor4 Detected PC111 PC112 PC113 PC114 Width mm 115 to 144 inclusive OFF OFF OFF OFF 196 to 225 inclusive A5 242 to 268 inclusive 5 133 to 164 inclusive A5R 169 to less than 196 B5R ON OFF OFF OFF 196 to 225 inclusive A4R 5 225 to less than 288 Letter 5 288 to 330 inclusive A4 9 ON ON OFF OFF 188 to 235 inclusive FLS E 7 201 to 231 inclusive Legal amp ON ON ON OFF E 268 to 288 inclusive 11x14 8 255 to less than 288 11x17 ON ON ON ON 288 to less than 301 A3 301 to 330 inclusive A3 Wide 81 17 Bypass section Theory of Operation Ver 1 0 Mar 2005 Inch Area Bypass FD Bypass FD Bypass FD Bypass FD Bypass Paper Size 3 Paper Size Paper Size Paper Size Paper Size Unit VR1 Paper Size 5 Sensor 1 Sensor 2 Sensor 3 Sensor 4 Detected 5 PC111 PC112 PC113 PC114 mim 115 to 144 inclusive B6R OFF OFF OFF OFF 201 to 231 inclusive 5
182. tric shock and fire exists Handling of Consumables NWARNING Toner and developer are not harmful substances but care must be taken not to breathe excessive amounts or let the substances come into contact with eyes etc It may be stimulative If the substances get in the eye rinse with plenty of water immediately When symptoms are noticeable consult a physician Never throw the used cartridge and toner into fire You may be burned due to dust explosion 6 Q Handling of Service Materials N CAUTION Unplug the power cord from the wall outlet Drum cleaner isopropyl alcohol and roller cleaner ace tone based are highly flammable and must be handled c with care A risk of fire exists Do not replace the cover or turn the product ON before any solvent remnants on the cleaned parts have fully evaporated A risk of fire exists 5 10 SAFETY AND IMPORTANT WARNING ITEMS Handling of Service Materials N CAUTION Use only a small amount of cleaner at a time and take care not to spill any liquid If this happens immediately wipe it off A A risk of fire exists When using any solvent ventilate the room well Breathing large quantities of organic solvents can lead to nM discomfort 5 11 SAFETY AND IMPORTANT WARNING ITEMS 4 Used Batteries Precautions ALL Areas CAUTION Danger of explosion if battery is incorrectl
183. ve 21 18 17 print 382 to 432 inclusive 19 17 15 B Color OHP Different types of PPM control are provided according to the mode regardless of the interior temperature or the Pressure Roller surface temperature during the print cycle The control does not cover the monochrome mode and any paper size other than A4 and Letter Mode Printed pages min PPM of A4 and Letter OHP continuous paper feed mode 8 OHP OHP Interleave mode 1 5 1 PPM control is provided only when OHP transparencies are fed through the machine for OHP OHP Interleave 96 Theory of Operation Ver 1 0 Mar 2005 20 Fusing section 20 3 7 Wait Control While Using OHP or Thick Paper When using OHP OHP interleaves thick papers 1 2 and 3 a control system is pro vided to delay printing operation until the fusing temperature reaches the print control temperature as the exit roller marks are imprinted on the papers if the papers pass immediately after standby temperature control f the temperature at the start of a print cycle is higher than the Heating Roller tempera ture setting the heater lamp is turned OFF and the Fusing Drive Motor is energized f the temperature at the start of a print cycle is lower than the Heating Roller tempera ture setting the heater lamp is turned ON When it does not reaches the imprint set temperature after 60 seconds at the maximum release WAIT and start printing operation The same Wait
184. vement of the Stapler Unit fthe Staple Unit is moved toward the front side the Finishing Tray Stopper is lowered FS 603 Paper Swing Guide Upper Exit Roller Finishing Tray Stopper i G g S Q e G 7 fe 4583M620AA Lower Exit Roller Staple Unit 18 Theory of Operation Ver 1 0 Mar 2005 5 Operation 5 3 4 Staple unit The Stapling operation is accomplished by a Cam rotated once with the Staple Folding Motor The Home position of this Cam is detected with the Staple Drive Home Position Sensor If the Staple Drive Home Position Sensor is OFF the Staple Folding Motor rotates in the forward direction until the Sensor is blocked or the signal is ON which designates that the position of the Cam is ready for the next stapling operation The Staple Detecting Sensor detects if the Staple Cartridge is in the Unit and if the staples are in the Staple Cartridge A Self Priming Sensor detects if the staples are positioned at the end of the Staple Cartridge This Finisher is equipped with the safety protection mechanism The Staple Folding Motor will not be turned ON without an ON condition with Swing Guide closed of the Front and Rear Staple Safety Switches FS 603 Home position Stapling position i 2 2 S o 99 2 o9 7 4583M621AA 19 5 Operation Theory of Operation Ver 1 0 Mar
185. ven in this service manual may not coincide with the actual machine When any change has been made to the descriptions in the service manual a revised version will be issued with a revision mark added as required Revision mark To indicate clearly a section revised show to the left of the revised section A number within represents the number of times the revision has been made To indicate clearly a section revised show in the lower outside section of the correspond ing page A number within A represents the number of times the revision has been made NOTE Revision marks shown in a page are restricted only to the latest ones with the old ones deleted When page revised in Ver 2 0 has been changed in Ver 3 0 The revision marks for Ver 3 0 only are shown with those for Ver 2 0 deleted When page revised in Ver 2 0 has not been changed in Ver 3 0 The revision marks for Ver 2 0 are left as they are 2005 03 1 0 Issue of the first edition Date Service manual Ver Revision mark Descriptions of revision Theory of Operation Ver 1 0 Mar 2005 CONTENTS Outline 1 1 1 2 1 to DVD 1 1 3 1 Group Group Offset nnn inre tenenti e ep ritorna ars 1 1 3 2 SOL SOIt Off Solano aA E DRE ION 2 1 3 3 Sort staple Group Staple eese 2 1 4 Stapling 1 5 Sortandistaple capacity cor te cnet rece a e Cro Did 3 106 dole Puriclis dori er
186. vided with a plug having configuration intended for the connection to wall outlet appropriate for the prod uct s rated voltage and current and the plug has pin terminal s for grounding and ab provided with three conductor cable having enough cur rent capacity and the cord set meets regulatory requirements for the area Use of inadequate cord set leads to fire or electric shock Attach power plug which meets the following criteria having configuration intended for the connection to wall outlet appropriate for the product s rated voltage and current and the plug has pin terminal s for grounding and aD meets regulatory requirements for the area Use of inadequate cord set leads to the product connect ing to inadequate power supply voltage current capacity grounding and may result in fire or electric shock Conductors in the power cable must be connected to ter minals of the plug according to the following order Black or Brown L line White or Light Blue N neutral a Green Yellow PE earth Wrong connection may cancel safeguards within the product and results in fire or electric shock S 3 SAFETY AND IMPORTANT WARNING ITEMS 3 CHECKPOINTS WHEN PERFORMING ON SITE SERVICE KONICA MINOLTA brand products are extensively tested before shipping to ensure that all applicable safety standards are met in order to protect the customer and customer engi neer hereaft
187. y replaced Replace only with the same or equivalent type recommended by the manufacturer Dispose of used batteries according to the manufacturer s instructions Germany VORSICHT Explosionsgefahr bei unsachgemaBem Austausch der Batterie Ersatz nur durch denselben oder einen vom Hersteller empfohlenen gleichwertigen Typ Entsorgung gebrauchter Batterien nach Angaben des Herstellers France ATTENTION Il y a danger d explosion s il y a remplacement incorrect de la batterie Remplacer uniquement avec une batterie du m me type ou d un type quivalent recom mand par le constructeur Mettre au rebut les batteries usag es conform ment aux instructions du fabricant Denmark ADVARSEL Lithiumbatteri Eksplosionsfare ved fejlagtig handtering Udskiftning kun ske med batteri af samme fabrikat og type Lev r det brugte batteri tilbage til leverand ren Finland Sweden VAROITUS Paristo voi r j ht jos se on virheellisesti asennettu Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin H vit k ytetty paristo valmistajan ohjeiden mukaisesti VARNING Explosionsfara vid felaktigt batteribyte Anv nd samma batterityp eller en ekvivalent typ som rekommenderas av apparat tillverkaren Kassera anv nt batteri enligt fabrikantens instruktion Norway ADVARSEL Eksplosjonsfare ved feilaktig skifte av batteri Benytt samme batteritype eller en tilsvarende type anbefalt av apparatfabrikanten Brukte batterier kass
188. zed Exit Motor M3 FN Finisher Tray Exit Roller 2nd paper exit tray 4853M010AF 1st Tray Entrance Switching Solenoid SL2 FN Upper Lower Entrance Switching Solenoid SL1 FN 4853M012AD 12 Theory of Operation Ver 1 0 Mar 2005 5 Operations 5 2 2 Paper switchback mechanism When the last paper of the first print set is transported onto the Finisher Tray during a multi print cycle in the Sort Staple mode the first paper of the subsequent print set which is to be next transported undergoes a switchback sequence The paper for the switchback is transported via the lower paper path The second paper of the second print set is placed over the paper which has undergone the switch back sequence After the first print set has been fed into the 2nd paper exit tray the first and second sheets of paper of the second print set are together transported onto the Finisher Tray The switchback sequence of the paper is performed by turning the motor backward which turns the Lower Path Transport Roller and Storage Roller backward The sheet of paper to be transported next to the one subjected to the switchback sequence is trans ported via the upper paper path No switchback sequence is carried out if the interval between sheets of paper is wide as when using paper of a large size CD LL Three 4 originals for two print sets t 02

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