Service Manual 2
Contents
1. gt UORE OAILUTUP OO gt gt Buiddoy eded pes eded yeaucoprad JajsueiL Buus Burn uon ob peded JOSUSS enuen Aiddins I SH dn gt peg uones pssy enuen Jp Jeded pued p Buea Bupsgy eded 2 5 1 Explanation of Each Process Operation 1 Hopping As shown in the figure below the clutch for hopping is turned on off according to current ON OFF to a coil When the clutch is OFF S pring for resetting Hopping gear Clutch plate Sd Magnetic substance plate N un L M a ur ir A at LA Ny EE A NS N Pin Hopping shaft Hopping roller Engagement section When the clutch is ON Hopping gear Clutch plate When the clutch is on the hopping gear engages with the clutch plate to rotate the hopping roller When the clutch is off the hopping gear is separated from the clutch plate by the spring for resetting disabling the rotation of the hopping roller 2 Printing and warm up At warm u Triple gear Transfer gear Resist gear x Idle gear lane Planetary gear2. ANDO el aa SPAY 215 S SY RY RY AY 328 8 2 8 8 8 8 5 9 8 zaj aj aj aj aj af o of zi oj o o 2 0 0 oo oo 91 91 91 072 2 019 ol zl ll dd lee 54444444 18 5 ad 13 a ES Ex Ex a E E E 5 031 7 2 Layout 1 Main Control Board HBMC 2 PCB Short Plag Plag Setting Content ExternalEPROM is valid 5 1 Mask ROM in the CPU is valid 2 High Voltage Power Supply Board 8 PARTSLIST Table 8 1 Cover Assy Upper Part Name Part No Remarks Upper Cover 1PP4128 1251P1 Lamp 3PP4128 1255P1 Guide Slide L 2PP4128 1256P1 Guide Slide R 2PP4128 1257P1 Spur Gear A 4PP4128 1260P1 Hopper Plate 1PP4128 1254P1 Extend Plate 2PP4128 1258P1 N Figure 8 2 Base Frame Unit Table 8 2 Base Frame Unit Part Name Part No Remarks Base Frame Assy 2PA4083 1132G1 High Voltage Power Supply Board 4YA4130 1004C1 Paper Sensor E 3PP4083 1191P1 Friction Pad 4PB4083 1245P1 Separator Guide 4083 1244 1 Compression Spring 5 4 4083 1246 1 Toner Sensor Assy 3PA4083 1193G1 Pulse Motor Main 4PB4083 1172P1 Ep Unit 4YA4083 1380G2 For ODA Ep Unit 4 4083 138063 For
3. Hopping gear Gear A Pulse motor main Rotate the pulse motor main in the adirection The planetary gear rotates in the direction dislocating its position in the a direction This causes the planetary gear to be separated from gear A The hopping gear will not rotate The triple gear and transfer gear rotate via the idle gear to drive the EP unit Triple gear At printing Transfer gear Idle gear Planetary gear Pulse motor main The paper is further advanced in synchronization to the print data 3 Charging Charging is performed by applying DC voltage to the charge roller that is in contact with the surface of the OPC drum Charge roller OPC drum 4 Exposure Light emitted from the LED head irradiates the negatively charged surface of the OPC drum The surface potential of the irradiated surface attenuates to form the electrostatic latent image corresponding to the image signal LED head LEDh Charge roller J ax High voltage power Supply OPC drum OPC drum Paper 5 Development The electrostatic latent image on the surface of the OPC drum is changed to a visible toner image by applying a toner to it Development is performed in the contact part between the OPC drum and developing roller D The sponge roller negatively charges a toner and applies it to the developing roller Developing blade Charge roller Sponge roller Developing roller O
4. No Connect the connectors correctly Y ves Replace the heat assy Has this error been recovered Yes End Y No Replace the main control board or high voltage power supply board Vertical white belt spripe Is the lens of the LED head dirty Yes Clean the LED head YNo Is the contact plate of the transfer roller in correct contact with the high voltage power supply board See Figure 6 5 E No Contact the contact plate of the transfer roller correctly Y Yes Replace the transfer roller Has this error been recovered Yes End Y No Is the LED head installed correctly Check the CN6 connector of the main control board No Install the LED head correctly Y Yes Replace the LED head Has this error been recovered Yes End Caution Set the LED head drive time when replacing the LED head See Section 4 2 1 Yyes Replace the EP unit Has this error been recovered Yes End Caution After replacing the EP unit reset the drum counter Refer to Replacing the Drum Cartridge in User s Manual Y No Replace the main control board or high voltage power supply board Contents Toner Supply Roller Developing Roller Charge Roller Cleaning Roller Transfer Roller Heat Roller Figure 6 4 Contents Toner Supply Roller B Developing Roller Q Charge Roller D Cleaning Roller E Ground Drum Figure 6 5 6 2
5. Back Up Roller 1 Dismount the upper cover assy See Section 3 3 4 2 Dismount the high voltage power supply board See Section 3 3 5 3 Dismount the heat assy See Section 3 3 11 4 Dismount the engagement with the left ground then pressure roller Two bearing BUs 2 and two bias springs 3 also come off at the same time 3 3 13 Separator Guide Dismount the upper cover assy See Section 3 3 4 Dismount the high voltage power supply board See Section 3 3 5 Remove five screws 1 Dismount inlet from base frame 3 lt Dismounting inlet gt Insert a screwdriver into the hole on the side of base frame 3 remove the inlet claw from base frame 8 and dismount inlet 2 Disconnect three cables 4 and connector 1 and dismount base frame 3 Then remove screw 10 and disconnect FG cable 2 lt Disconnecting connector 1 Dismount connector 17 by drawing it upward while pushing the clamp lever with a standard screwdriver Dismount the paper holder assy See Section 3 3 7 Dismount two engagements and sheet guide 5 Dismount friction 6 compression spring S and separator guide 8 Dismount paper sensor 3 3 14 Pulse Motor Main 1 Dismount the upper cover assy See Section 3 3 4 2 Dismount the high voltage power supply board See Section 3 3 5 3 Dismount side plate M See Section 3 3 8 4 Dismount the bas
6. Figure 4 3 4 2 3 Uploading and Downloading EEPROM Data When the main control board is replaced EEPROM data must be reflected on a new main control board Use EEPROM Operations in the option tab of the maintenance utility to reflect EEPROM data on the new main control board See Figure 4 4 Reflect EEPROM data on the new main control board in the following procedures 1 Check that the printer and PC are connected by the parallel I F then execute the maintenance utility 2 Click the Option button in Main Menu Dialog 3 Click the Upload button Upload EEPROM Data in EEPROM Operations EEPROM data read is completed 4 The read EEPROM data is displayed in Dialog of the maintenance driver 5 Leave the display of the maintenance driver as is and replace the main control board 6 Click the Download button Download EEPROM Data in EEPROM Operations EEPROM data write is completed Depending on the level of a main control board failure parallel I O failure etc however EEPROM data may be unable to be uploaded In such acase use the maintenance utility to perform the following adjustment after replacing the main control board Setting the LED head drive time Section 4 2 1 Setting the LED head dot count Section 4 2 2 Setting specifications ODA OEL INT A INT L 5 PERIODICAL MAINTENANCE 5 PERIODICAL MAINTENANCE 51 Periodical Replacement Parts Ta
7. Exit Clicking the Exit button terminates the maintenance utility lt Engine Maintenance Driver GUI Preliminary gt Oki Page Printer Engine Maintena Engine Menu Setting Printer Status Print Position Omm Ready Warming Up LED Head Marking No fi 55 167 Setup Language OPEL LED Head Width Full Engine Counter Reset Test Print Narrow Drum Count LED Head Wire 300 1W C 300 2w Total Drum Count 3 e Reload 2 1 Page Count 6 0 OA About Reset All Oki Page Printer Engine Maint EEPROM Operation Printer Engine Reset EEPROM Data Upload EEPROM Data Download Check Printer RAM Check User m Figure C 2 Option Menu Dialog Preliminary Oki Page Printer Engine Maintenance Figure C 3 About Dialog Preliminary HP LaserJet and PCL5e are trademarks of Hewlett Packard Co Oki Systems Danmark a s Park Alle 382 DK 2625 Vallensbaek Denmark Tel 436 66500 Fax 436 66590 Oki Systems France S A 44 50 Avenue du General de Gaulle 94240 L Hay les Roses France Tel 0146 158000 Fax 0141 240040 Oki Systems Italia S p A Centro Commerciale II Girasole PAT Cellini Lotto 3 05 B 20084 Lacchiarella Milano Italy Tel 02900 261 Fax 02 900 7549 Oki Systems UK Ltd 550 Dundee Road Slough Berkshi
8. If this error occurs frequently replace the power supply board Buffer overflow Page Buffer Overflow The page buffer overflowed because there are a large number of print data To release the error display press the reset button on the status motor of the printer driver Install option RAM or reduce the number of print data Print Over Run A print overrun occurred because print data is complicated To release the error display press the reset button on the status motor of the printer driver Simplify the print data format Device configuration error Program ROM Check Error An error occurred during program ROM check Replace program ROM or the main control board When replacing the main control board also adjust EEPROM data See Section 4 2 4 Resident RAM Check Error An error occurred during resident RAM check Replace the main control board When replacing the main control board also adjust EEPROM data See Section 4 2 4 Category Status Message Status Code Table 6 1 Cont d Display Content Remedy Device configuration error EEPROM Check Error 60 40 An error occurred during EEPROM check Replace the main control board When replacing the main control board also adjust EEPROM data See Section 4 24 Option RAM Check Error An error occurred during option RAM check Check the connection of the Option RAM PC board Ifthe option RAM
9. 4PP4083 1247P 1 Top Cover Assy 2PA4128 127161 For ODA Top Cover Assy 2PA4128 127162 For OEL OKI INT Head Spring 4PP4083 6168P 1 LED Head 4YA4116 1228G1 Flat Cable Assy 4 4083 113461 Bias Spring Back Up Roller 4 4083 1137 1 Sheet Guide 1PP4083 1241P1 Film FG 40011401 Heat Assy 1Y X4083 1200G1 Heat Assy 1YX4083 1200G2 Stopper S pring 40034001 Caution Label TR B4091 6047P1 PartName Table 8 3 Heat Assy Part No Remarks Heat Roller 3PB4083 1202P1 Halogen Lamp 3PB4083 6103P4 Halogen Lamp 3PB4083 6103P5 Thermostat 4PB4083 1204P1 Thermistor 4PB4083 1205P1 Heat Cord 4PB4083 1213P1 Figure 8 4 Base Plate Unit 8 8 Table 8 4 Base Plate Unit Part Name PartNo Remarks Base Plate Assy 3PA4083 1135G1 Insulation Sheet 3PB4083 1251P1 Power Supply Unit 4YB4049 1853P1 120V Power Supply Unit 4YB4049 1854P 1 230V Main Control Board HBMC 2 PCB 4YA4121 251662 Without ROM Program ROM 4YR4077 1670G1 EP ROM AC Cord 3YS4011 1315P1 USA AC Cord 3 54011 1266 1 Continental AC Cord 3 54011 1270 1 3 54011 1329 2 Australia Insulation Sheet B 40043001 APPENDIX Appendix A LOCAL PRINTING 1 The following operation enables the OKIPAGE 4w to print dat
10. CN1 Pin 7 and CN1 Pin 13 of the high voltage power supply board Pin 7 5 V Pin 13 0 V the CN1 connectors of the high voltage power supply board and main control board connected correctly Connect the CN1 connectors correctly Yves Is 5V supplied between CN2 Pin 2 and CN2 Pin 3 of the main control board Pin 2 45 V Pin 3 0 V No Replace the power supply board Y ves Replace the main control board Is 1 2 V voltage supplied between CN1 Pin 2 and CN1 Pin 13 of the high voltage power supply board No Replace the main control board Replace the high voltage power supply board Replace the main control board JAM error 2 1 Paper input jam Does a paper input jam occur when the power supply is turned on Yes Is the jammed paper on paper sensor E Yes Remove the jammed paper YNo Is paper sensor E manual feed paper operating normally No Replace paper sensor E manual feed or paper Y ves Replace the high voltage power supply board No Does a paper input jam occur during paper loading Yes Is the paper already fed to paper sensor E manual feed Yes Is paper sensor E manual feed operating normally No Replace paper sensor E manual feed Yes Check the gear block or replace high voltage power supply board YNo Is the paper already fed to paper sensor E paper Yes Is paper sensor E paper operating normally No Replace paper sensor E paper Yes
11. OEL OKI INT I Toner Cartridge Unit Toner Cartridge Unit 40035001 4 4083 145063 ForODA For OEL OKI INT Hopping Roller 4PB4083 1129P1 Roller Holder Hopping Roller 4083 1128 1 Magnet H Hopping Shaft 3PB4083 1127P1 Hopping Shaft Assy 3PA4083 1133G1 Knock Pin NK2 10 SUS Idle Gear R Idle Gear 2R 4P P 4083 1143P 1 4083 1184 1 GearR 3PP4083 1142P1 Idle Gear M 3PP4083 1181P1 Earth Plate A 4083 1189 1 Side Plate 4083 1188 1 dle Gear P 4083 1182 1 dle Gear 3R 4083 1183 1 Tension Plate 4 4083 1165 1 dle Gear Heat 3PP4083 1185P1 dle GearE A 4 4083 1186 1 dle Gear E 4083 1187 1 Drive Shart E Eject 3PP4083 1170P 1 EjectRoller Resistration Bearing 4PB4083 1171P1 3PP4083 1141P1 Resistration Roller 3PB4083 1140P1 Torsion Spring 4 4083 1252 1 PartName Part No Remarks GearT 3PP4083 1151P1 Transfer Roller 3Y B4083 1150P 1 Bias Spring L Back Up Roller 4P P4083 1136P 1 Bearing BU Back Up Roller 3PP4083 1161P1 Pressure Roller B Back Up Roller 3PB4083 1160P2 Paper Guide R 3PP4083 1233P1 Paper Guide L 3PP4083 1232P1 Paper Holder 1PP4083 1231P1 Paper Sensor Exit 3PP4083 1192P1 Hopper S pring
12. REPLACEMENT esbiItUDD ISUTSwISUTTIcUI DUUU TSvuvSSfSvvsIS S 3 1 Precautions for Parts 3 1 2 2 Pants La yd anne 3 3 3 3 Replacing Parts een ee 3 6 3 3 1 Extend Plate ovio la 3 6 3 3 2 LED Head and Head 3 7 3 3 3 Transfer Rolle Juice is ae led 3 8 3 3 4 Upper Cover ASSY RE 3 9 3 3 5 High Voltage Power Supply 3 10 3 3 6 Top Cover Assy and Flat Cable 3 11 3 3 7 Paper Holder ee ee ee ese eed eL eee 3 12 3 3 8 Side Plate M and Idle Gear 3 13 3 3 9 Registration Roller en 3 14 3 3 10 Drive Shaft E Eject and Eject Roller 3 15 3 3 11 Heat ASSy 3 16 3 3 12 Pressure Roller B Back Up 2 3 19 3 313 Separator 3 20 3 3 14 Pulse Motor Main 0 222 1 0 0 000 3 22 3 9 15 Hopping Shaft ASSy 3 23 3 3 16 Paper Sensor E Paper Sensor Exit and Toner Sensor Assy 3 24 3 3 17 Base Plate TE dena 3 25 A ADJUSTMENT 4 1 41 Adjustment Types and Functions 1 1 4 1 1 Printer Driver nee 4 1 4 1 2 Engine Mainten
13. Replace high voltage power supply board No Replace the stepping roller or friction pad No Is the hopping roller rotating 4 Yes an the coil resistance of magnet Is the resistance normal about 120 9 No Replace magnet H Y Yes Is 24 V supplied between CN8 Pin 1 and CN8 Pin 2 of the main control board Replace the main control board YNo Check the gear block or replace the hopping shaft assy Y No Are the CN7 connectors of the pulse motor main and main control board con nected No Connect the CN7 connectors correctly Y Yes Measure the resistance of the pulse motor main Is the resistance normal about 12 6 0 No Replace the pulse motor main Y Yes Replace the main control board JAM error 2 2 Paper feed jam Does a paper feed jam occur when the power supply is turned on Yes Is the jammed paper on paper sensor E paper exit Yes Remove the jammed paper No Is paper sensor E exit paper operating normally Replace paper sensor E exit or paper Y ves Replace the high voltage power supply board Has the paper arrived at paper sensor E paper No Is the feed roller rotating Check the gear block Y Yes Is the EP unit set correctly Set the EP unit correctly Y ves Check the gear block Has the paper arrived at the paper sensor exit Is the paper sensor exit operating normally No Replace the paper sensor exit Yes Replac
14. Take care that cable 3 will not interfere with the paper sensor exit when it is connected 3 3 6 Cover Assy and Flat Cable Assy 1 Dismount the upper cover assy See Section 3 3 4 2 Dismount the LED head See Section 3 3 2 3 Press the left clamp outward and dismount engagement and top cover assy 1 Tension spring 2 also comes off at the same time 4 Disconnect connector CN6 and dismount flat cable assy 3 5 Remove screw 5 and dismount FG cable 4 Connector CN6 3 3 7 Paper Holder 1 Dismount the upper cover assy See Section 3 3 4 2 Dismount paper holder 1 3 Unlock and dismount paper guide L 2 and paper guide 3 4 Remove the claw and dismount hopper spring 4 b Remove the claw and dismount stopper spring 5 3 3 8 Side Plate and Idle Gear Perform parts replacement while making the base frame assy stand so that side plate M will face upward 1 Dismount the upper cover assy See Section 3 3 4 2 Remove two screws 1 and two claws then dismount plate side 2 3 Dismount earth plate two idle gears PG idle gear idle gear idle gear 28 0 idle gear heat 8 idle gear RO and gear Rd 3 3 9 Registration Roller 1 Dismount the upper cover assy See Section 3 3 4 2 Move registration roller 1 to the right and dismount it by lifting Two registration bearings 2 also come off at the same time Take
15. lvl use 7 2 ee a ee een here 8 1 APP ENDIX_ A LOCAL PRINTI NG ee Ree ee adque een ee ee 1 r APPENDIX PARALLEL INTERFACE 1 1 CONFIGURATION CONFIGURATION System Configuration The OKIPAGE 4w consists of a control block a power supply unit and an engine block See Figure 1 1 ENGINE UNIT Paper Feed Mechanism Hopper Plate Electro photographic Processor High Voltage Power Supply Board Power Supply Unit Figure 1 1 Main Control Board 1 2 Printer Configuration The printer unit consists of the following five hardware components Electro Photographic Processor Paper Feeder Main Control Board High Voltage Power Supply Board Power Supply Unit Figure 1 2 is the configuration of the printer unit we Upper Cover Assy 225 KS Power Supply Ss SE 7 y Main Control Board High Voltage Power Supply Board Figure 1 2 1 3 Specification 1 2 Type Outside dimensions excludes protruding portion Weight Development method Exposure method Paper used Printing speed Paper feeding method Paper delivery method Resolution 10 Power input 11 Power consumption Desktop Height 5 9 150 mm Width 12 2
16. of the main control board No Connect the LED head correctly Y Yes Is the terminal of the EP unit in correct contact with the contact plate See Figure 6 5 E No Contact the terminal correctly Y ves Replace the LED head Has this error been recovered Yes End Caution Set the LED head drive time when replacing the LED head See Section 4 2 1 Y No Replace the main control board or high voltage power supply board Vertical black belt stripe Replace the EP unit y Has this error been recovered Yes End Caution After replacing the EP unit reset the drum counter Refer to Replacing the Drum Cartridge in User s Manual YNo Replace the LED head Has this error been recovered Yes End Caution Setthe LED head drive time when replacing the LED head See Section 4 2 1 Replace the main control board high voltage power supply board Cyclic defect Cycle Remedy EP drum 1 98 50 3 mm Clean replace the EP unit Developing roller 1 44 36 6 mm Replace the EP unit Toner supply roller 2 63 66 8 mm Replace the EP unit Charge roller 0 81 20 6 mm Replace the EP unit Cleaning roller 0 81 20 6 mm Replace the EP unit Transfer roller 1 71 43 4 mm Replace the EP unit Heat roller 2 46 62 5 mm Replace the heat roller Pressure roller B 1 98 50 3 mm Replace pressure roller B Caution After replacing the EP u
17. or disable Connector pin arrangement 4 Signal level LOW 0V to 0 8 V HIGH 2 4 V to 5 0 V 5 Interface circuit a Receiving circuit R 3 3KQ 1 0 KQ STROBE 5V b Sending circuit Open Collector xo y 5V 6 Timing charts a Data receiving timing compatible mode PARALLEL DATA DATA BITs 1 to 8 x 0 5 us min DATA STROBE 0 5 us min _ He 0 5 us min 0 5 us min 0 5 us max BUSY 0 min ACKNOWLEDGE 0 5 us to 10 us a 0 0 min b INPUT PRIME timing when the INPUT PRIME signal is enabled 50 ms min gt INPUT N J BUSY SELECT 5 usmax 0 min ACKNOWLEDGE 5 us max 0 5 us to 10 ms c Data sending timing nibble mode ACKNOWLEDGE BUSY 12222 NAWS KIIK DNAT Iz FAULT LX WWO KK DN SELECT IN DM AX D 7 PAPER END X ONN X TZ Appendix MAINTENANCE UTILITY 1 OUTLINE OF MAINTENANCE UTILITY The maintenance utility is an application program that operates on Microsoft Windows 3 1 or higher The maintenance utility has the following functions Transmission of menu setting command to initialize and change setting values Printer RAM check Test printing Printer information display e Printer EEPROM read write ROLE OF MA
18. 1 7 WIRING DIAGRAM 7 WIRING DIAGRAM 7 1 Interconnect Signal Diagram Developing Roller Toner Supply Roller 230V 120V Charge Roller OPC Drum 8 E 4 u il 200 ii JEBEBR MS no Jojsiuuau ZNI Pu Lo E MANO TOONI p 2 E 5 5 2 gt 5 gt GNA 8 a 8 E u 9 04402 TNI 00000000 0 Og 000000 0 0 0 0 O 11400 20 EOONI 9999999 hia 9Torgrar pars apap afa z fla za z lol gt 5 Ja 2252 In g H l saaa si Vale NENE EEE SEEE DEE E EE E E ka b a b a b ka O ba eal gfe e aa o 9 T0 59 99 999 99 99 2G PG Po Po POH 8000000001 Josuas ahelloA UbIH IND d ZNI ono 09 m oo O oo 8 9 5 M oo E 2470 U O 5 ong cd 5 9 we 43 Y 2 3 9 Elo Ede 9 ehana alt d IHdnd E arena 4 YNI e H 031 ee 031 9N2 X0000000000000000008 0494940940401
19. 310 mm Depth 7 5 191 mm 3 8 kg Dry non magnetic development system LED stationary head lt Type gt Standard paper Xerox 4200 20 lbs Application paper manual face up feed Label Envelope OHP paper Transparency lt Size gt 14 355 6 mm Max x 8 5 215 9 mm lt Thickness gt Automatic feed 16 to 28 lbs 60 to 90 g m Manual feed Label Envelope OHP paper transpar ency First print 25 seconds A4 after warm up Continuous print Warm up time 4 sheets minute A4 40 seconds 120 VAC for ODA 230 VAC for OEL INT at room tempera ture 77 F 25 C Automatic paper feed or manual paper feed Face down 300 dpi x 300 dpi 600 dpi x 600 dpi quasi 230 VAC 15 14 for OEL INT 120 VAC 6 15 for ODA Peak 450W Typical operation 100W Idle 30W Power save mode 5W 12 Temperature and humidity Temperature Humidity During operation 10 to 32 C 20 to 80 RH relative humidity In storage 10 to 43 C 10 to 90 RH relative humidity No condensation is permissible Caution Temperature and humidity in storage are measured with the PN212 being packed they are valid for one year 13 Noise 14 Consumables During operation Standby Toner cartridge kit Image drum cartridge 48 dB A or less 38 dB A or less 1 000 5 duty 10 000 at continuouts printing 1 4 Safety Standards 141 Certifica
20. 51 i LT6S9IASIA 2 2 1 Main Control Board The main control board consists of a one chip CPU a program ROM a DRAM an EEPROM a host interface circuit and amechanism driving circuit The mechanism driving circuit consists of a LED head a main motor and an electromagnetic clutch 1 One chip CPU The one chip CPU is a custom CPU 8 bit internal bus 8 bit external bus 10 MHz clock incorporating mask ROM and CPU peripheral devices This CPU has the functions listed in the table below Built in Device Function DRAM controller Controls DRAM DMA controller Transfers image data from Parallel I F to DRAM from DRAM to a video output port and between CPU and DRAM Parallel interface controller Controls the parallel interface Video output port Controls LED head LED STB output port Timer Generates various control timings for monitoring paper feeding and a paper size 1 0 port Inputs and outputs the sensor signals and motor signals etc Also performs I O for EEPROM AJD converter Inputs the feedback signals from a high voltage generation circuit and thermistor signal 2 Program ROM Program ROM contains a program for the equipment EPROM is used as program ROM When mask ROM in the one chip CPU explained in 1 above is valid the EPROM is not mounted For details on short wiring se
21. INTENANCE UTILITY The maintenance utility is a collection of command send receive functions to realize the printer maintenance functions For this reason only servicemen and maintenance personnel can use the maintenance utility This utility cannot be made public for printer end users OUTLINE OF MAINTENANCE UTILITY FUNCTIONS The maintenance utility is classified into the following functional units and displayed e Engine Menu Setting Used to display and change engine menu settings Engine Counter Used to display and initialize the engine counter Printer Status Used to display the printer status Test Print Used to execute test printing Option Special function About Used to display engine maintenance utility information and printer information Reload Used to reload menu setting values 4 1 4 2 DETAIL OF EACH FUNCTION Engine Menu Setting Engine Menu Setting is used to set display and change the following menu items See Figure C 1 1 Print Position Used to adjust the print start position 2 LED Head Marking No Used to adjust the exposure time of the LED head 3 LED Head Width Used to specify the LED head dot count 4 LED Head Wire Used to specify whether the data wire of the LED head is one wire non adjustment type or two wire adjustment type This printer however can use only one wire type 5 Setting or Humidity Used to adjust transfer current 6 Entry
22. OKI OKIPAGE 4w LED Page Printer Maintenance Manual All specifications are subject to change without notice PREFACE This Maintenance Manual describes the field maintenance methods for LED Page Printers This manual is written for use by service persons Please note that you should refer to the Printer Handbook for the handling and operating methods of the equipment CONTENTS de CONF IGURATION seep 11 1 1 System Configuration nes nee 1 1 1 2 Printer Configuration nee 1 2 1 3 Specification nee ee 1 3 1 4 Safety 1 5 1 4 1 Certification Eabeli 2 ated tene tad 1 5 1 4 2 Warning Label 1 5 2 OPERATION DESCRIPTION cvrIevvsenvuIweuvvIwvvvtse Ivvv rsvvvrwwv vn 1 1 2 1 Main Control BOSE par 2 3 22 Power Supply Unit t 2 4 2 3 High Voltage Power Supply 2 4 2 4 Electro Photographic 2 6 2 0 Electro Photographic Process un ae ek 2 10 2 5 1 Explanation of Each Process 2 12 2 6 Paper Jam 2 18 2 7 Toner Low 2 20 2 8 Cover A 2 21 e PARTS
23. P unit it is used when printing is unclear For details on how to operate this function refer to User s Manual 4 1 4 1 2 Engine Maintenance Utility See Appendix C 4 2 Adjustment When Replacing a Part The table below lists the parts that requires adjustment when they are replaced Part to be Replaced Adjustment Set the LED head drive time Set the LED head dot count LED head EP unit Reset the drum counter Refer to User s Manual Main control board Upload or download EEPROM data 4 2 1 Setting LED Head Drive Time Caution When the liminous intensity of a new LED head is the same as that of the old LED head do not set the LED head drive time Use LED Head Making No inthe engine menu tab of the maintenance driver to set the luminous intensity displayed on the LED head as the LED head drive time See Figure 4 2 Luminous intensity of LED head Luminous intensity display 070 314 122861 INURL rd The lastthree digits indicate the luminous intensity of the LED head Figure 4 2 4 2 2 Setting the LED Head Dot Count There are two types of LED head dot count Use the following label to identify these types Use LED Head Width in the engine menu table to set the LED head dot count See Figure 4 2 Identifying the types of LED head dot count 122861 Nallow 2496 dots A4 300 0100221127107 Full Type 2560 dots
24. PC board is faulty replace it Fuser Error A heater timeout error occurred See Section 6 5 2 4 Thermistor Error A thermistor error occurred Replace the thermistor of the heater Assy Thermister Open Check Error The thermistor is open Replace the thermistor of the heater Assy Thermister Short Check Error A thermistor short occurred Replace the thermistor of the heater Assy Watch Dog Timeout Error A watchdog timeout occurred To release the error display turn on the power supply again Replace the main control board 6 5 2 Status Message Troubleshooting Some failures cannot be corrected according to the status message trouble list Troubleshoot these failures according to the following troubleshooting flowcharts Item Flowchart No The OKIPAGE 4w malfunctions after the power supply has been turned on Jam error Paper input jam 2 1 Paper feed jam 2 Paper exit jam Paper size error Fusing error Caution When replacing the main control board troubleshooted according to the troubleshoot ing flowcharts also adjust EEPROM data See Section 4 2 4 D The OKIPAGE 4w malfunctions after the power supply has been turned on Turn the power supply off then on again t No t Yes Yes Yes Is the LED lamp on Is the AC cable connected correctly No Connectthe AC cable correctly Is 5 V supplied between
25. PC drum The toner applied to the developing roller is thin coated by the developing blade 3 A toner adheres to the exposure part of the OPC drum in the contact part between the OPC drum and developing roller This causes the electrostatic latent image to be changed to a visible image 6 Transfer The transfer roller is composed of conductive sponge material This roller is set so thatthe surface of the OPC drum and sheets of paper will adhere closely A sheet of paper is placed on the surface ofthe OPC drum and the positive charge opposite to the negative charge of a toner is applied from the reverse side by the transfer roller When a high negative voltage is applied from the power supply to the transfer roller the positive charge induced on the surface of the transfer roller moves to the paper side at the contact part between the transfer roller and the sheet of paper The positive charge on the lower side of the sheet of paper then causes the negatively charged toner adhering to the surface of the OPC drum to move to the upper side of the sheet This enables transfer to the sheet of paper OPC drum High voltage power supply Transfer roller 7 Fusing Thetransferred unfused toner image is fused to a sheet of paper because heat and pressure are applied when it passes between the heat roller and back up roller The Teflon coated heat roller contains a 400 W heater Halogen lamp that heats the heat roller The thermi
26. The display of the higher level host is used for device operation and status display Figure 2 1 is the block diagram of the OKIPAGE 4w 19019 1 2 aniy E IC LE lt qun Addins vod A Javod N OEZ A CET dans gt 10 dW BuuadMs A GE 1 1 gt AVE NO _LV3H duej N UNO 1 AHO NO Idoy 1 NAUA IN3H ag 1 1 1 1 1 1 1 1 JEH 1 lt pueog Apdns aber S6ey0V lt K I gt AND Addins 1 S z PS Javod 4 D obey 42 N3SHuL asuy Ko NISAL 49 1 1 1 1 1 1 1 1 l 1 yams uedo Jano JOI PS PUOL 1 Avaa OLV OV Li gt spass CA SopS i Josues PANO T i JOSUgs Jeded 1 JOSUBS jenue an f 1 1 sa gt 1 2neuba uon 1 ze Tae gt muun gt Peeudagi 1 pesyas O E d l SO e m 1 1 1 1 1 1 i 1 1 1 IO p i EC x pile ed 1 1 1 S amp P 1 WOdds LV OV LCON Kaeo Ke A 10
27. Used to reflect the engine menu setting values on the printer 7 Cancel Used to clear unreflected items Items for which Entry is not specified Engine Counter Engine Counter is used to display and initialize the following count values See Figure C 1 1 Drum Count Number of revolutions of mounted EP drum 2 Total Drum Count Total number of revolutions of EP drum after shipment 3 Page Count Total number of printed pages after shipment clicking the Reset button cleans each counter 4 Reset All Used to clear all counters 4 3 4 4 4 5 4 6 4 7 4 8 Printer Status Printer Status is used to display the printer status See Figure C 1 Test Print Test Print is used to check whether the printer can print data normally after the maintenance utility has terminated Option Option is used to execute the following functions 1 Printer Engine Reset Used to initialize the engine menu and counter 2 EEPROM Upload Used to upload EEPROM contents to the file 3 EEPROM Download Used to download data from the file to EEPROM 4 Printer RAM Check Used to check printer RAM 5 User Used to set a destination default ODA OEL INTL INTA See Figure C 2 About About is used to display the following information Engine maintenance utility version information Printer version information and memory size information Printer device ID information See figure C 3 Reload Reload is used to reload menu setting values
28. a by itselt lt Operation gt With the cover open turn on the AC switch and then close the cover The following print patterns are printed Appendix B PARALLEL INTERFACE 1 Connector Printer side 36 pin receptacle Type 57RE 40360 730B D29A Daiichi Denshi or equivalent Cable side 36 pin plug Type 57 30360 Daiichi Denshi or equivalent 2 Cable Cable length 6 feet 1 8 m max A Shielded cable composed of twisted pair wires is recommended for noise prevention 3 Parallel I F signals Pin No Signal Name Direction Function Compatible Mode 1 DATA STROBE PR Parallel data sampling strobe 2 DATABIT 1 DATABIT 2 4 DATA BIT 3 5 DATABIT 4 PR Printer parallel input output data 6 DATABIT 5 7 DATABIT 6 8 DATABIT 7 9 DATABIT 8 10 ACKNOWLEDGE lt Completion of input data reception 11 BUSY lt PR The OKIPAGE 4w is not ready to receive data 12 PAPER END lt PR Paper end detection 13 SELECT lt PR Select state Online 14 AUTOFD PR Carriage return control 15 Not used 16 0V Grounding for signals 17 UNE Frame ground 18 PR 50 mA max 19 OV Grounding for signals 30 31 INPUT PRIME PR Initialization signal 32 FAULT PR Paper end or alarm 33 0V Grounding for signals 34 Not used 35 High level 3 3 36 SELIN PR Data input enable
29. aintenance Tools Table 3 1 lists the maintenance tools necessary for parts replacement Table 3 1 Maintenance Tools Maintenance Tools Use Remarks No 1 100 Philips 2 2 5 mm screw screwdriver No 2 100 Philips screwdriver 3 5 mm screw No 3 100 Philips screwdriver No 5 200 screwdriver Digital multimeter tester P liers Handy cleaner Maintenance Utility Table 3 2 Maintenance Utility Maintenance Utility Remarks aM Maintenance utility 3 2 Parts Layout This section explains the layout of main parts Upper Cover Assy Extend plate Spurgear A Guide slide R Guide slide L Upper cover Figure 3 1 Base Frame Unit LED head Flat cable assy Head spring Top cover assy Pressure roller B A Back up roller Paper guide R bM a 7 Paper guide L Transfer roller A X y Resistration roller gt r i Z 2 N pod Idle gear heat Paper a X pm eject P d EM Tension plate 7 2 LO Slide plate M A holder shaft assy cartridge High voltage unit supply board Pulse motor main Power sensor E Hr Sheet guide er EP unit Figure 3 2 Hopping Base Plate Unit Power supply unit Base plate assy Figure 3 3 3 5 3 3 3 3 1 Replacing Parts This section explains how to replace parts and assemblie
30. al 13 A6 A5 A4 B5 Monarch COM 10 DL C5 COM 9 Request the paper to be set in the manual feed mode The paper sizes are as follows Executive Letter Legal 14 Legal 13 A4 A5 A6 B5 Monarch DL C5 COM 10 COM 9 Set the requested paper in the manual feed mode Category Status Message Table 6 1 Cont d Display Content Remedy Paper size error Paper Size Error Paper of improper size was fed 2 52 64mm L 15 77 400 56 mm Check the paper Also check whether more than one sheet of paper were fed simultaneously To release the error display open the cover then close it If this error occurs frequently see Section 6 5 2 3 Paper jam Cover open Paper Input am A paper jam occurred when sheets of paper were being supplied Check the paper To release the error display close the cover then close it If this error occurs frequently see Section 6 5 2 2 1 Paper Feed Jam A paper jam occurred during paper feeding Open the cover then remove the jammed paper To release the error display close the cover If this error occurs fre quently see Section 6 5 2 2 2 Paper Exit am Cover Open A paper jam occurred during paper ejection The upper cover is open Open the cover then remove the jammed paper To release the error display close the cover If this error occurs fre quently see Section 6 5 2 2 3 To release the error display close the cover
31. ance Utility 4 2 4 2 Adjustment When Replacing a 4 2 4 2 1 Setting LED Head Drive Time sess 4 2 4 2 2 Setting the LED Head Dot 4 3 4 2 3 Uploading and Downloading EEPROM Data 4 4 5 PER IODICAL_ MAINTENANCE ye i Pe uS dem a a aa QUE ea er RU IE de 5 1 idm 5 1 Periodical Replacement Parts 5 1 52 RE 5 1 5 2 1 Cleaning of LED Lens 5 1 6 TROUBLESHOOTING PROCEDURES esee 6 1 6 1 Troubleshooting 2 gt 6 2 Check Points Before Correcting Image Problems 6 1 6 3 Notes When Correcting Image Problems 6 1 6 4 Preparation Before Troubleshooting 6 1 6 5 Troubleshooting ee 6 2 6 5 1 Status Monitor Message 6 2 6 5 2 Status Message Troubleshooting 6 6 6 5 3 Image Troubleshooting sireisas 6 13 17 WIRING DIAGRAM treten qt 4 27777 Interconnect Signal Diagram Pod 7 2 POB
32. ble Perform detailed troubleshooting according to the troubleshooting flow See Section 6 5 2 Trouble indicated by the message displayed on the status monitor Troubleshoot according to Status Monitor Message List See Section 6 5 1 Image problem or L trouble not displayed on the status monitor Troubleshoot according to Section 6 5 3 651 Status Monitor Message List Table 6 1 lists the statuses and troubles to be displayed on the status monitor in the message format Category Status Message Table 6 1 Display Content Normal status Warming Up Warming up status Normal operation Online Ready Online ready status Normal operation Power Save Mode Power save status Normal operation Toner Low The toner amount of the toner cartridge is small Normal operation Toner Sensor The EP unitis not installed or the toner sensor is faulty Replace the toner cartridge Change Drum Life of EP drum Install the EP unitor replace the toner sensor Manual Paper In The paper is in the manual feed mode Replace the EP unit Note Be sure to resetthe drum counter after replacing the EP unit Printing In Progress Printing in progress Normal operation Ejection In Progress Ejection in progress Normal operation Manual Request Executive Letter Legal 14 Leg
33. ble 5 1 lists the part and unit to be replaced periodically Part Name Table 5 1 Routine Replacement Parts Replacement Time Part to be Checked Simultaneously Remarks Toner cartridge When Toner Low is displayed LED head Consumables EP unit When Change Drum is displayed Caution Also reset the drum counter when replacing the EP unit 5 2 Cleaning Consumables Remove any toner or dirt and clean the circumference and inside of the printer with a waste cloth Caution Do not touch the OPC drum LED lens array and connector block of the LED head 5 2 1 Cleaning the LED Lens Array When a white belt or a white stripe void light printing occurs in the vertical direction of the print surface clean the LED lens array or replace the toner cartridge Caution Be sure to use an LED head cleaner to clean the LED lens array White belt or stripe void light printing Figure 5 1 1 Setthe LED head cleaner in the LED lens array as shown in the figure below and slide the cleaner left and right several time to clean the head Caution Do not press the LED head cleaner against the LED lens array LED lens array LED head cleaner Figure 5 2 6 TROUBLESHOOTING PROCEDURES 6 1 6 2 6 3 6 4 TROUBLESHOOTING PROCEDURES Troubleshooting Tips 1 Check the basic check points written in the user s manual 2 Gather detailed failure information as much as possible fr
34. care not to lose them 3 3 10 Drive Shaft E Eject and Eject Roller 1 Dismount the upper cover assy See Section 3 3 4 2 Dismount top cover assy See Section 3 3 6 3 Remove two screws 1 from cover head assy Section 3 3 11 lift the heat assy and dismount idle gear E A 2 and idle gear E 4 Unlock and dismount drive shaft E Eject 5 Dismount two eject rollers 5 3 3 11 Heat Assy This section explains how to dismount the heat assy and parts in the assy lt Dismounting the heat assy gt 1 Dismount the upper cover assy See Section 3 3 4 2 Dismount the high voltage power supply board See Section 3 3 5 3 Remove two screws 1 disconnect connector 2 and dismount heat assy 3 lt Dismounting parts in heat assy gt 4 Dismount heat separator 2 5 Remove screw 4 and dismount terminal plate 6 Handle heat assy 3 carefully because Halogen lamp comes off 6 Turn left and right heat bearings 8 in the arrow direction to unlock Then dismount Halogen lamp 2 heat bearing 8 heat roller 9 and heat gear 3 together Take care not to drop Halogen lamp 7 Dismount thermistor 0 8 Dismount the clamp then thermostat 17 heat contact 42 and heat cord 5 together 9 Dismount heat contact 12 and heat cord 5 from thermostat Caution Take care not to bend the claw when dismounting heat bearing 8 3 3 12 Pressure Roller
35. e frame See Section 3 3 13 5 Remove two screws 1 and dismount pulse motor main 2 3 3 15 Hopping Shaft Assy Dismount the upper cover assy See Section 3 3 4 Dismount the high voltage power supply board See Section 3 3 5 Dismount the base frame See Section 3 3 13 Dismount the paper holder assy See Section 3 3 7 Dismount the sheet guide See Section 3 3 13 Dismount side plate M See Section 3 3 8 Raise up roller holder 3 slide hopping shaft assy 1 and dismount roller holder 3 and hopping roller Knock pin also comes off at the same time Take care not to lose it Draw out hopping shaft assy to the right and dismount magnet 6 3 3 16 Paper Sensor E Paper Sensor Exit and Toner Sensor Assy 1 Dismount the upper cover assy See Section 3 3 4 2 Dismount the high voltage power supply board See Section 3 3 5 3 Dismount the base frame See Section 3 3 13 4 Dismount the paper holder assy See Section 3 3 7 5 Dismount the sheet guide See Section 3 3 13 6 Dismount the heat assy See Section 3 3 11 7 Dismount drive shaft E See Section 3 3 10 8 Dismount paper sensor EQ 9 Dismount paper sensor exit 2 10 Dismount toner sensor assy 3 3 3 17 Base Plate 1 Dismount the upper cover assy See Section 3 3 4 2 Dismount the base frame See Section 3 3 13 3 Remove two screws 1 disconnect connector 2 and di
36. e the high voltage power supply board No Check the gear block 2 3 Paper exit jam Yes Is the jammed paper on the paper sensor exit Yes Remove the jammed paper YNo Is the paper sensor exit operating normally Replace the paper sensor exit Does a paper exit jam occur when the power supply is turned on Y ves Replace the high voltage power supply board Check the gear block or replace the eject roller Paper size error Is the paper of the specified size being use No Use paper of the specified size Y Yes Is paper sensor E paper operating normally No Replace paper sensor E paper or clean the inlet sensor on the high voltage power supply board Y Yes Is the paper sensor exit operating normally No Replace the paper sensor exit or clean the outlet sensor on the high voltage power supply board Y Yes Replace the high voltage power supply board Exit roller Paper sensor exit Heat roller Transfer roller Feed roller Paper sensor E paper 5 5 E t 5 7 sensor Hopping assy _ Paper manual feed 4 Heat assy error Turn the power supply off then on again y Does the Halogen lamp of the heat assy go on No Is the Halogen lamp or thermostat disconnected Yes R
37. eplace the heat assy Halogen lamp or thermostat No Replace the power supply unit Y Yes Are the CN2 connectors of the power supply unit and main control board connected correctly No Connect the CN2 connectors correctly Y ves Replace the main control board 6 5 3 Image Troubleshooting This section explains how to troubleshoot when an image problem is output as a result of the printing Figure 6 3 is an example of image problem output Flowchart No An image is light or blurred entirely Figure 6 3 A Dark background density Figure 6 3 8 A blank paper is output Figure 63 0 Vertical block belt black stripe Figure 6 3 D Cyclical defect Figure 6 3 E Print void Poor fusing An image is blurred or peeled off when it is touched Vertical white belt white stripe Figure 63 6 Light or blurred Dark background Blank paper images entirely density AR D Black vertical stripes E Cyclical defect F White vertical belts or streaks Figure 6 8 Image Problems An image is light or blurred entirely lt 15 the toner low Is Toner Low being displayed Yes Supply atoner 4 Is the specified paper being used Use the specified paper Is the lens of the LED head dirty Yes Clean the LED head Is LED head installed correctly Check the CN6 connector of the mai
38. et sensor within L mm after the leading part of the paper has passed the outlet sensor 2 52 64 mm L 15 77 400 6 mm Paper size error The trailing part of the paper does not pass the paper sensor within L mm after the leading part of the paper has passed the paper sensor 2 52 64 mm SL 15 77 400 6 mm Paper Feed Check List Type of Error Supervisory Sensor Reference Value Paper feed error Electromagnetic clutch ON Paper sensor 0 oye Paper feed jaml Paper sensor 0 Outlet sensor O 07 Paper size error Paper sensor 2 52 64 mm SL 5 Paper sensor O 15 77 400 56 mm Paper outlet jam Outlet sensor ON 2 52 64 mm SL Outlet sensor OFF 15 77 400 56 mm Paper feed jam 2 Paper end sensor OFF 1219 Outlet sensor OFF Unit mm Pulse motor main Electromagnetic clutch Manual feed sensor Paper sensor Outlet sensor Operation mode Normal rotation Warm up Paper feed Printing Timing Chart for Paper Feed Tray Feed 2 7 Toner Low Detection Hardware configuration of toner sensor The figure below shows the hardware configuration of the toner sensor T Image drum unit Agitation bar iron Magnet Toner sensor lever P hotointerrupter Hardware Configuration of Toner Sensor Toner detection method 1 Toner sensor moni
39. he image drum unit makes a toner adhere to the formed electrostatic latent image with static electricity This electrostatic latent image is formed by the lights irradiated from LED heads 2 Electromagnetic clutch The electromagnetic clutch controls the rotation of the hopping roller according to signals from the control block 1 055 014 Jo Buimelg 2 4 Gunaud 3 Pulse motor Main This pulse motor of 48 steps rotation is two phase excited by the signal from the main control board it performs feeding control by switching normal rotation to reverse rotation or vice versa and turning on off the electromagnetic clutch The relationship between the main motor electromagnetic clutch regist gear drum gear hopping roller is shown in the table below and on the subsequent pages Main Motor Electromagnetic Clutch Hopping Roller Regist Gear Drum Gear Operation Normal rotation OFF Non rotation Non rotation Rotation Warm up Reverse rotation ON Rotation Rotation Rotation Hopping Non rotation Rotation Rotation Prinitng 4 LED head The shift and latch registers receive image data from the main control board for each 2 560 or 2 496 LEDs are driven to radiate the image drum 5 Heat Assy The heat Assy consists of a heater a heat roller a thermistor and a thermostat The power
40. n control board Install the LED head correctly Yes Is the contact plate of the transfer roller in correct contact with the high voltage power supply board See Figure 6 4 Yes Is the terminal of the EP unit in correct contact with the contact plate See Figure 6 4 A and Contact the terminal correctly Yes Replace the transfer roller Has this error been recovered Yes End No Replace the EP unit Yes End Caution After replacing the EP unit reset the drum counter Refer to Replacing the Drum Cartridge in User s Manual this error been recovered No Replace the main control board or high voltage power supply board Dark background density Has the OPC drum being exposed to external light Yes Set the OPC drum in the OKIPAGE 4w and wait for about 30 minutes Y No Is the heat roller of the heat assy dirty Yes Clean the heat roller Y No Is the terminal of the EP unit in correct contact with the contact plate See Figure 6 4 D and Figure 6 5 D No Contact the terminal correctly Y ves Replace the EP unit Has this error been recovered Yes End Caution After replacing the EP unit reset the drum counter Refer to Replacing the Drum Cartridge in User s Manual Y No Replace the main control board or high voltage power supply board A blank paper is output Is the LED head connected correctly Check the CN6 connector
41. nit reset the drum counter Refer to Replacing the Drum Cartridge in User s Manual A blank paper is output Is the contact plate of the transfer roller in correct contact with the high voltage power supply board No Contact the contact plate of the transfer roller correctly Yes Replace the transfer roller Has this error been recovered Yes End Y No Is the terminal of the EP unit in correct contact with the contact plate See Figure 6 4 O and Figure 6 5 B D No Contact the terminal of the EP unit correctly Y ves Replace the EP unit Has this error been recovered Yes End Caution After replacing the EP unit reset he drum counter Refer to Rplacing the Drum Cartridge in Users Manual No Is the LED head installed correctly Check the CN6 connector the main control board No Contact the LED head correctly Y ves Replace the LED head Has this error been recovered Yes End Caution Set the LED head drive time when replacing the LED head See Section 4 2 1 No Replace the main control board or high voltage power supply board Poor fusing lt Is the specified paper being used Use the specified paper xerox 4200 20 Ibs Y Yes Is the bias spring normal Tension 2 5 kg No Replace the bias spring Y ves Are the heater connector of the heat assy and the 001 connector of the power supply unit connected correctly
42. om the customer 3 Check the printer under the condition close to that under which the failure occurred Check Points Before Correcting Image Problems 1 Is the printer running in proper ambient conditions 2 Are consumables toner and EP unit replaced correctly 3 Are sheets of paper normal 4 Is the EP unit set correctly Notes When Correcting Image Problems 1 Do not touch the surface of the OPC drum nor place foreign matter on it 2 Do not expose the OPC drum to direct sunlight 3 Do not touch the fuser because it heats up during operation 4 Do not expose the image drum to light for more than five minutes at room temperature Preparation Before Troubleshooting 1 Message display The failure status of the OKIPAGE 4w is displayed on the status monitor of the PC Take proper action according to the message displayed on the status monitor 2 LED display The OKIPAGE 4w is equipped with only one LED This LED indicates one of the following statuss Printer Status LED Indication Ready Lighting Printing in progress Blink 1 The LED blinks ata cycle of 1 second 0 5s ON Recoverable alarm Blink 2 from data reception to printing end m The LED blinks ata cycle of 0 24 second 0 12s ON Unrecoverable alarm Blink 53 The LED blinks ata cycle of 0 24 second 0 125 ON 6 5 Troubleshooting If a trouble occurs in the OKIPAGE 4w troubleshoot according to the following procedures Trou
43. ounting not mounting When mounting parts assemblies and units reverse the dismounting steps Precautions for Parts Replacement 1 Be sure to dismount the AC cord and interface cable before replacing parts a Be sure to dismount the AC cord in the following procedures i Turn off the POWER switch of the printer 0 ii Disconnect the AC inlet plug of the AC cord from the AC receptacle iii Disconnect the AC cord and interface cable from the printer b Be sure to reconnect the printer in the following procedures i Connect the AC cord and interface cable to the printer ii Connect the AC inlet plug to the AC receptacle iii on the POWER switch of the printer AY gt gt e mn mn g X y e lt P lt lt ON Reconnection 2 Do not disassemble parts as long as the printer is operating normally a Minimize disassembling Only the parts indicated in the parts replacement procedures can be dismounted 4 Use only the specified maintenance tools 5 Disassemble parts in the specified sequence otherwise parts may be damaged 6 Temporarily tighten small parts such as screws and collars to the original locations because they tend to be lost easily 7 When handling ICs such as CPUs ROM and RAM and PC boards do not wear gloves that easily cause static electricity 8 Do not place PC boards directly on devices and floors M
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45. s Extend Plate 1 Remove two claws and dismount hopper plate assy 1 2 Dismount extend plate 3 from hopper plate 3 3 2 LED Head and Head Spring 1 Open top cover assy 1 2 Dismount the left clamp and LED head 2 Then dismount flat cable assy 3 and FG cable 3 Dismount two head springs 2 3 3 3 Transfer Roller 1 Open top cover assy 1 and dismount EP unit 2 2 Remove the right claw Then dismount transfer roller 3 two registration bearings and gear TG 3 3 4 Upper Cover Assy Turn off the power switch and unplug the AC cord from the AC socket Disconnect interface cable 1 Open top cover assy 2 and dismount EP unit Move paper guide L and paper guide R on the rear of the printer to the center Remove two front claws of upper cover assy 6 and two rear screws 1 and lift upper cover assy Dismount spur gear A 7 guide slide L 8 and guide slide Dismount lamp 49 3 3 5 High Voltage Power Supply Board Dismount upper cover assy See Section 3 3 4 Remove three screws 1 and draw out high voltage power supply board 2 Disconnect all the cables 3 from high voltage power supply board 2 and dismount high voltage power supply board 2 Caution Note the following when assembling the high voltage power supply board Mount the high voltage power supply board with top cover assy removed or open
46. smount power supply unit 3 4 Dismount insulation sheet 5 Remove two screws 5 and dismount main control board from base plate 7 4 ADJUSTMENT 4 1 ADJUSTMENT This chapter explains adjustment necessary when a part is replaced This adjustment is made by changing the parameters values set in EEPROM on the main control board The printer driver or maintenance utility can be used to change these values Only servicemen and maintenance personnel can use the maintenance utility This utility cannot be made public for printer end users Adjustment Types and Functions Printer Driver This printer driver has the following functions Drum counter reset Printer menu default Charge roller cleaning OKIPAGE 4w Operator Panel x Paper Input Print Quality DOS Emulation Power Saving Immediate an em Disabled Forms Calibration Maintenance X Position Adjust 0 00 millimeters Y Position Adjust 0 00 millimeters Figure 4 1 1 Drum counter reset This function resets the life of the drum counter when the EP unit is replaced Clicking the Drum Count Reset button resets the life 2 Printer menu default This function returns the user set menu contents to default settings Clicking the Default button automatically returns the user set menu contents to default settings 3 Charge roller cleaning This function cleans the charge roller of the E
47. stor on the surface of the heat roller Keeps the temperature of the heat roller constant A thermostat is also installed for safety If temperature rises abnormally this thermostat opens to suspend voltage supply to the heater The back up roller is pressurized to the heat roller by the pressure spring on each side Thermistor Separation claw Heat roller Heater Pressure spring 8 Cleaning After transfer has terminated the cleaning roller temporarily draws in the untransferred residual toner adhering to the OPC drum with static electricity and then returns it to the OPC drum OPC drum Cleaning roller High voltage power supply Transfer roller 2 6 Paper Jam Detection The OKIPAGE 4w monitors the paper status when the power supply is on and during printing In the following cases the OKIPAGE 4w interrupts the printing process as apaper jam Printing can be recovered by opening the cover removing the jammed paper and closing the cover Error Cause of Error Paper inlet jam Only the manual feed sensor detects Paper exists when the power supply is on The leading part of the paper does not reach the paper sensor although hopping operation was performed three time Paper feed jam Paper outlet jam The leading part of the paper does not reach the outlet sensor within a fixed time after it has passed the paper sensor The trailing part of the paper does not pass the outl
48. sts of the high voltage power supply circuit that supplies power to the electro photographic processor system and the photosensor that detects a paper feeding system and toners Figure 2 2 shows the sensor layout drawing Exit roller Outlet sensor Heat roller Transfer roller Feed roller Paper sensor 1 1 t 1 sensor Hopping assy roller Manual feed sensor Paper feeding direction ____ gt gt Figure 2 2 Sensor Function Sensing State Manual feed onitors whether paper was inserted into the manual feed sensor sensor section N Paper exists FF No paper exists Paper sensor Detects the leading part of the paper onitors paper feeding Paper exists FF No paper exists Outlet sensor onitors paper feeding and the paper size according to the paper sensor arrival and passing time N Paper exists FF No paper exists Toner sensor Detects the low toner status long Toner low FF short Toner High 0 0 0 0 0 0 0 0 2 4 Electro Photographic Processor The electro photographic processor prints out the image data to be sent from the main control board on sheets of paper Figure 2 3 shows the layout drawing of the electro photographic processor 1 Image drum unit T
49. supply unit supplies AC voltage to the heater according to the HEATON signal from the main control board to heat the heat roller The main control board monitors the heat roller temperature via the thermistor and keeps the temperature constant by turning on off the heater AC voltage supply If the heat roller temperature rises abnormally the thermostat of the heater voltage supply circuit functions to forcibly suspend the AC voltage supply AOVdINO 10 Buimelg 2 anliy uo si yamp ua npp pauuoped si apway uoge edo P Gurddou BIIO pesy 399u eor BUON 491101 HD BuLIESP Aeg PUNUE au sd joua sey 2 SEI PE Burdogrep Pia H uel HJE eroi cundum Jeu espd jeuonear 7 ur u asind Aq I I JJI EH SIONS la uue HO Budo aopouuunug Ip aix uu qau jo uoneioi jguouAqueupegaamow Uen qau uoge esEmaAqueawpeqaaled 2 2 5 Electro Photographic Process 1 Electro photographic process The electro photographic process is outlined below O Charging The surface of the OPC drum is charged negativel
50. tion Label The safety certification label is affixed to the following location of the OKIPAGE 4w OKIDATA Division of OKI AMERICA Inc Model 8000 120VAC 50 60Hz ODA This device complies with Part 15 of the FCO Rules Operation is subject to the following two conditions 1 ihis device may not couse harmful interference and 2 this device must accept any interference received including interference that may cause undesired op OKIPAGE 4w Model No EN8000B 230V 50 60 2 2 OEL OKI INT G9 A BS 7002 Oki Data Corporatation Made in Japan 1 4 2 Warning Label Warning labels are affixed to the locations that may cause bodily injury During maintenance do work with enough care while following instructions on these warning labels CAUTION HOT ATTNTION CHAUDE VORSICHT HEIB ATENCION ALTA TEMPERATURA ATENC O ALTA TEMPERATURA 2 OPERATION DESCRIPTION OPERATION DESCRIPTION The OKIPAGE 4w consists of a main control board a high voltage power supply board a power supply unit and an electro photographic processor The OKIPAGE 4w receives print data from a higher level interface and sequentially stores it memory The OKIPAGE 4w decodes and edits the received data while storing print data from the interface in memory It sequentially transfers the edited data to the LED head for each dot line The electro photographic processor then prints the data on sheets of paper
51. toring conditions are shown in the figure below Toner sensor Magnet draw in Caution The toner sensor is not monitored when the drum is inactive a b When the toner low state continues twice Toner Low occurs This state is monitored at a cycle of 40 milliseconds When the toner full state continues twice Toner Low is released This state is monitored at a cycle of 40 milliseconds When the toner sensor does not change over two cycles T x 2 the toner sensor alarm state occurs After the EP unit has been replaced after the drum counter has been reset Toner Low is not detected when the drum counter indicates 1 to 100 counts 2 8 2 The basic rotation cycle of the toner sensor is as follows T time Basic rotation cycle oftoner sensor 4 9 sec Toner low time tl gt 1 2 sec Toner full time 1 2 sec gt tl gt Cover Open Opening the stacker cover turns off the microswitch on the high voltage power supply board to suspend 5 V supply to the high voltage power supply This results in the stop of all high voltage outputs Atthe same time the CVOPN signal is issued to notify the main control board of the switch status and cover open processing is executed 3 PARTS REPLACEMENT 3 1 Dismounting gt PARTS REPLACEMENT This chapter explains how to replace parts assemblies and units in the field The replacement procedures to be explained here include dism
52. tting see Section 7 2 DRAM DRAM is used as resident memory EEPROM EEPROM holds the following data Menu data Counter value Adjustment value Parallel interface The parallel interface receives parallel data from the host it conforms to the IEEE1284 specification 2 2 2 3 Power Supply Unit The power supply unit supplies 5 V and 24 V to the main control board according to 230 VAC 120 VAC Output voltage Application 5 V Used to generate a logic circuit and a high voltage 24 V Used to drive the motor and electromagnetic clutch The power supply unit also contains a heater drive circuit High Voltage Power Supply Board 1 High Voltage power supply circuit The high voltage power supply circuit generates the following voltages required for the electro photographic processor from 5 V according to the control sequence from the main control board When the coveris open 5 V supply is automatically interrupted to stop high voltage output Voltage Application 1 35 KV Voltage to be applied to a charge roller 300 V 300 V Voltage to be applied to a developing roller 450 V 0V Voltage to be applied to sponge roller 400 V Voltage to be applied to a cleaning roller 500 V 43 5 KV 750 V Voltage to be applied to a transfer roller Caution The TR voltage varies with medium and transfer roller impedance 2 Sensors The high voltage power supply board consi
53. x 01236 451972 OKI People to People Technology Oki Data Corporation 4 11 22 Shibaura Minato ku Tokyo 108 Japan Tel 03 5445 6162 Fax 03 5445 6189 M 521426 3 96 Printed in Japan
54. y and uniformly by applying the DC voltage to the CH roller Exposure Light emitted from the LED head irradiates the negatively charged surface of the OPC drum The surface potential of the irradiated surface attenuates to form the electrostatic latent image corresponding to the image signal Development and residual toner recovery The negatively charged toner is brought into contact with the OPC drum adhering to the electrostatic latent image on the OPC drum by static electricity This adhesion causes the electrostatic latent image to change to a visible image At the same time the residual toner on the OPC drum is attracted to the developing rollerby static electricity Transfer When paper is placed over the image drum surface the positive charge which is opposite in polarity to that ofthe toner is applied to the reverse side by the transfer roller The toner is attracted by the positive charge and is transferred onto the paper This results in the transfer of the toner image formed on the image drum onto the paper Cleaning The cleaning roller temporarily attracts the residual toner on the transferred OPC drum with static electricity then returns the toner to the OPC drum Fusing The transferred unfused toner image is fused to a sheet of paper by applying heat and pressure to the image Figure 2 5 is a flow for the electro photographic process 5 4 10 G Z
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