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OKIPAGE 8c

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1. roile Shah asy or paper cassethe NO the hopping rober and feed roller rotating YES Sel lhe paper propedly ig me pues mHor Turning YES Replace Ihe hopping roller assy ar one way Gulch gear on fhe feed assi MO is the connector being connected properly lhe eonnectar pripe YES Check the cod resistance approx 8 342 of tho pulse motor lg it normal Se stepping YES e 515 2 Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BP X for any updates to this material http opx okidata com Page 135 OKI Service Guide OKIPAGE 8c Chapter Product Accessory Second Paper Feed 4 3 2 Troubleshooting Flow Does paper am occur at the inlet when the power is bumed on YES is fhe paper above the sensor plate Iiet YES Hembowve the pager MO fs the sensor plate inlet operating normally NO the sensor pale inlet YES Raplace the powan sensor board or inlet senar MO When the paper ia fed m does the paper input jam occur YES ts the paper being fed to above sensor plate YES 15 the sensor plate inet operating normaly NO Replace tha saneor plate inlet YES Clean ihe inlet sensor on the gower sansor board or replace tha power sensor board or inlet sensor Faplace the hoppin
2. 128 Service Guide OKIPAGE 8c Chapter Product Accessory Second Paper Feed 3 3 6 Side frame L assy 1 Remove the hopping roller see 3 3 5 2 Remove three screws 1 and remove the upper plate 2 3 Remove the cassette lock spring 3 link 4 pull block 5 note the directions of the hooks of the cassette lock spring 3 4 Remove the spring 7 and cassette stopper 8 5 Remove the screw 9 and remove the link support 10 Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 129 Service Guide OKIPAGE 8c Chapter Product Accessory Second Paper Feed 3 3 7 Side frame R assy 1 Remove the hopping roller see 3 3 5 2 Remove three screws 1 and remove the upper plate 2 3 Remove the cassette lock spring 3 link 4 pull block 5 and earth plate 6 note the directions of the hooks of the cassette lock spring 3 4 Remove the spring 7 and remove the cassette stopper 8 5 Remove the screw 9 and remove the link support 10 6 Remove the screw 11 and remove the detector spring 12 7 Remove the screw 13 and remove the AOLD PCB 14 Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx
3. NMQ3C66N NW 4 CPU BUS VIDEO L E V VIDEO MEM HM658512 JSC 28MHz LSI 1T3PFV HESET GENERAL INFUT PORT Engine Control Board Block Diagram containing AD converter arola gt Y HEAD UF 3 3V gt M HEAD 3 3V C HEAD VF 3 3v gt BHEAD UF 3 3V MT DRIVER MTD2005F MT DRIVER MTLD2ODSF MT DRIVER MTLDZODSF PULSE MOTOR x 8 8 HIGH VOLTAGE POWER SUPPLY SERIAL INTERFACE 2 channals h LN GENERAL OUTPUT PORT engine control block is controlled by the engine control board PX4 PCB which consists of a CPU MSM65524 general purpose LSI chips EPROM EEPROM pulse motor drivers and video memory Refer to the Engine Control Board Block Diagram 1 2 3 4 5 6 This is 8 bit CPU MSM65524 containing the AD converter and controls the whole system General purpose LSI This LSI MB87D113PFV is provided in the printer engine control block and has controller engine video interface LED interface motor control sensor input video memory control main scanning color correction skew correction high voltage power control and OST EX2 functions EPROM This EPROM 275C512 150 has a storage capacity of 512K bits and stores programs for the PU block EEPROM This EEPROM NM93C66N NW has a storage capacity of 4K bits It is mounted on the board by m
4. j8 amp 4 fll 4 40168401 Spring Support R RSPL 8 4 14 Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 63 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 36 Contact Bracket BL R Assy Contact Bracket CL R Assy 1 gs 3 4 Remove the gear one way 230 See 3 3 14 Remove the motor assy BT See 3 3 15 Remove the high voltage power supply unit See 3 3 33 Remove the shaft link See 3 3 35 Removal of the contact BL R Assy 5 Unscrew 2 screws 1 and unplug the cable 2 then rmeove the contact BL R assy 3 Removal of the contact CL R Assy 6 Unscrew 2 screws 4 then remove the contact CL R Assy 5 Contact CL R Assy Contact BL R Assy Figure 3 3 36 Contact Bracket BL R Assy Contact Bracket CL R Assy 40173301 Cord Wire Amp 14p 1MPX43 RSPL 8 4 18 40309001 Contact BK T CL R Assy RSPL 8 4 7 Loon o 2 40135301 Interrupter_ 846 Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 64 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 37 Contact BL L Assy Contact CL L Assy
5. Ok a Service Guide OKIPAGE 8c Chapter 5 Maintenance 5 1 Periodically Replaced Parts The parts listed below should be replaced periodically If the parts are not replaced output quality may be poor in extreme cases the printer may malfunction Parts Name Display of warning Recommend Adjustment after condition condition for replacement replacement Toner Cartridge When the TONER When 1 800 pages are Replace Toner LOW message is printed out 596 prunt Cartridge displayed density without the first cartridge Image Drum When the CHG When 12 000 pages are Reset the drum counter DRUM message is printed out of the replaced drum displayed Oil Roller Assy When the OIL When 10 000 pages are Replace Holder Assy ROLLER LIFE printed out Oil Roller message is displayed Waste toner bottle When the WASTE When 25 000 pages are Replace Waste Toner TONER FULL printed out single Bottle and Oil Roller message is displayed images of 5 print density Fuser Unit When the FUSER When 60 000 pages are Reset the fuser counter LIFE message is printed out displayed message is displayed printed out The above parts may be replaced by the user Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 83 OKI Service Guide OKIPAGE 8c Chapter 5 Maintenance 5 2 Cleanin
6. SETTING EEPROM ENGINE ENGINE RESETTING REST RESET Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 78 Ok a Service Guide OKIPAGE 8c Chapter 4 Adjustments 4 2 Adjustments after Parts Replacement Adjustments required after parts replacement are listed below Adjustment and correction of color deviations are always required after parts are replaced Part replaced ED head Drum cartridge Y B and user Unit Transfer Belt Heset the belt counter and correct color deviations EEPROM PU block oet the LED head driving time and correct color deviations Oil Roller Reset the oil roller counter Other parts Correct color deviations if any 4 2 1 Confirm the LED head driving time 4 2 2 Color Registration Adjustment Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 79 Ok a Service Guide OKIPAGE 8c Chapter 4 Adjustments 4 2 1 Confirm the LED head driving time Note When a new LED HEAD is installed the printer reads the contents of the EEPROM within the LED HEAD automatically re setting the drive time Therefore the re setting of drive time is not necessary A confirmation of the
7. Ok a Service Guide OKIPAGE 8c Chapter Product Accessory Second Paper Feed 3 3 4 Feed roller 1 Remove 16 screws and remove Cover Upper and Cover Lower see 3 3 1 step1 2 Remove the front panel assy see 3 3 1 step2 3 Remove the AOLT PCB see 3 3 2 4 Remove the hopping motor assy see 3 3 3 5 Remove the latch on the feed roller gear 1 and remove the feed roller gear 1 6 Remove the latch on the feed roller bearing 2 and remove the feed roller bearing 2 7 Shift the feed roller 3 to the right side and lift it out holding it on the left side Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com 127 Service Guide OKIPAGE 8c Chapter Product Accessory Second Paper Feed 3 3 5 Hopping roller 1 Remove the feed roller see 3 3 4 2 Remove the latch on the hopping roller gear 1 and remove the hopping roller gear 1 The bearing F 2 comes off at the same time so be careful not to lose it 3 Remove the latch on bearing L 3 and remove the bearing L 3 4 Remove the hopping roller sub 4 and remove the hopping roller rubber 5 from it Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com
8. 1 2 External View and Component Names Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 114 Ok a Service Guide OKIPAGE 8c Chapter Product Accessory Second Paper Feed 1 1 Functions The printer is mounted on top of this High Capacity Second Paper Feeder The High Capacity Second Paper Feeder supplies paper automatically through the operation of pulse motor hopping which is driven by signals sent from the printer The main functions are the following e Paper that can be used Paper Type Standard paper Xerox 4200 20 Ib Special paper OHP sheets for PPC Label sheets PPC sheets use of envelopes or thick paper is not possible Cut sheet size 4 A5 B5 Letter Executive Legal13 Legal14 Special size Paper width 148 to 216mm Paper length 210 to 355 6mm Weight e 16 0 24 10 60 to 90 g m e Paper setting quantity 500 sheets of paper weighing 64 g m Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 115 Ok a Service Guide OKIPAGE 8c Chapter Product Accessory 1 Second Paper Feed 1 2 External View and Component Names Frant Gover Asay Guida L 2rd Assy Copyright 1
9. 4 2 Adjustments after Parts Replacement Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com 74 OKI Service Guide OKIPAGE 8c Chapter 4 Adjustments 4 1 Maintenance Modes and Their Functions 4 1 1 User maintenance mode 4 1 2 System maintenance mode 4 1 3 Engine maintenance mode Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 75 Ok a Service Guide OKIPAGE 8c Chapter 4 Adjustments 4 1 1 User maintenance mode To enter the user maintenance mode press and hold the MENU key while powering on the printer a b d e f 9 h Functions Hex dump FUSER COUNT RESET Oil roller count reset Receive buffer size Menu reset Drum counter reset YELLOW MAGENTA CYAN BLACk Belt count reset Resource save area X adjust Operator panel menu disable Darkness SETTING YELLOW MAGENTA CYAN BLACK e Color Reg Adjust Execute Menu reset 1 Resets all Menu Level 1 settings to the default settings which have been factory set 2 Resets all executable Emulation menu items including options to factory set default emulation items Hex dump 1 Receives data from the host computer and dumps it
10. 6 1 Troubleshooting Tips 1 Check the basic check points covered in the user s manual 2 Gather as much information on the problem from the customer as possible 3 Perform inspections in conditions close to those in which the problem occurred Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 87 Ok a Service Guide OKIPAGE 8c Chapter 6 Troubleshooting Procedures 6 2 Points to Check before Correcting Image Problems 1 Is the printer being run in proper ambient conditions 2 Have the supplies toner and the routine replacement part image drum cartridge been replaced properly Does the paper meet specifications See paper specifications section Has the image drum cartridge been installed properly Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 88 OKI Service Guide OKIPAGE 8c Chapter 6 Troubleshooting Procedures 6 4 Preparation for Troubleshooting 1 Operator panel display The error messages for this printer are displayed on the liquid crystal display LCD in the operator panel Take proper corrective action as directed by messages that are displayed on the LCD Copyright 1998 Okidata Division of OKI Am
11. 9 2 Layout 138 6 PARTS LIST 139 High Capacity Second Paper Feeder 140 2 Tray Assembly 141 Page 2 Ok a Service Guide OKIPAGE 8c Chapter 0 Introduction Preface This manual provides procedures and techniques for the troubleshooting maintenance and repair of OKIPAGE 8c This manual is written for maintenance personnel but it should always be accompanied with the OKIPAGE 8c User s Manual for procedures for handling and operating OKIPAGE 8c For repairing each component of OKIPAGE 8c see the Troubleshooting Manual Notices The contents of this manual are subject to change without prior notice Although reasonable efforts have been taken in the preparation of this manual to assure its accuracy this manual may still contain some errors and omissions OKI will not be liable for any damage caused or alleged to be caused by the customer or any other person using this maintenance manual to repair modify or alter OKIPAGE 8c in any manner Warning Many parts of OKIPAGE 8c are very sensitive and can be easily damaged by improper servicing We strongly suggest that OKIPAGE 8c be serviced by OKI s authorized technical service engineers Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 3 OKI Service Guide OKIPAGE 8c Chapter 1 Specifications 1 1 Basic Syste
12. America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 70 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 43 PXL PCB Remove the paper eject assy See 3 3 3 Remove the belt cassette assy See 3 3 32 Remove the heat unit assy See 3 3 40 Unplug the cable 1 and the screw 2 then remove the PXL PCB 3 Release the lock of the claw then remove the sensor cover 4 de eS 9 Figure 3 3 43 PXL PCB 1 _ 40171801 Cord Wire AMP7P AMP7P White RSPL 8 3 57 300 mm 3 140437501 PXL PCB 8 3 56 4 40162201 Cover Sensor RSPL_ 8 3 54 Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 71 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 44 Heat Unit Guide Assy Remove the cover assy rear See 3 3 1 Remove the paper eject assy See 3 3 3 Remove the gear heat assy See 3 3 12 Remove the belt cassette assy See 3 3 32 Open the stacker cover and remove the heat unit assy See 3 3 40 Pak wD Unscrew 4 screws 1 then remove the heat unit guide assy 2 D Figure 3 3 44 Heat Unit Guide Assy 2 40162101 Guide Assy Heat Unit RSPL 8 3 39 j ndude
13. Heat Mech Assy RSPL 8 5 40 8 5 11 5 40124101 Motor Pulse ID RSPL Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com 40 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 13 Main Motor A B Assy Hemove the PXF PCB and PX4 PCB See 3 3 11 Remove the 4 screws 8 and remove 4 plate Earth 9 and 4 lever Up Dn 2 1 Detach the all the cables 2 connected and unscrew 4 screws 3 then remove the main motor A assy 4 Detach the all the cables 5 connected and unscrew 3 screws 6 then remove the main motor B assy 7 Figure 3 3 13 Main Motor A B Assy 1 8 5 6 8 5 4 1 40664501 Lever Up Dn 2 8 5 41 Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 41 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 14 Gear One way Z30 Four gear one ways 230 are provided but the method of those replacements is the same Do not disassemble the gear one ways 730 because they are assemblies which require adjustment Remove the PCB assy PCM See 3 3 9 Remove the cover CU See 3 3 11 Remove the 4 Plate Earth and 4 lever U
14. Indicates Nothing NRFULL that the Waste Toner Bottle is near full OIL PAD NOT Undefined Undefined Undefined Undefined OFF BLINK Indicates Please INSTALLED that the Oil install the Oil Pad Assy Pad Assy has not been installed Category Buffer Overflow Table 6 1 LCD Status LED LED LED LED READY Trouble Remedy Message K C M Y ON or Status f Undefined Undefined Undefined Undefined Blink Indicates This error MEMORY that data corrected overflowed when the OVERFLOW the memory RECOVER space switch is Too much print data in one page Expand Too much RAM or macro data reduce data Too much DLL data Data overflow after compression of frame data ERROR Undefined Undefined Undefined RECEIVE BUFFER OVERFLOW Undefined O Blink Indicates This error is that the corrected receive when the buffer RECOVER overflowed switch is pressed Increase the setting of Receive Buffer Size in User Maintenance Mode then send the data from the host or expand RAM LCD Status LED LED LED LED READY Trouble Remedy Message K Y ON or Status Category Tray Paper Out Table 6 1 PAPER OUT Undefined Undefined Undefined Undefined OFF Blink Indicates This mmmmmmm that the tray message is is empty or cleared mm tttttt the cassette when paper assembly is set in the has not been tray or the installed cassette assembly is mm m mount
15. OK A Service Guide OKIPAGE 8c Chapter 0 Introduction Front Cover OKIDATA Service Guide OKIPAGE 8c OKIPAGE 8cn LED PAGE COLOR PRINTER PRODUCTS Adobe Acrobat printable reference copy of the OKIDATA Service Training Manual 11 02 98 Rev 2 0 Note This Adobe Acrobat version of the Okidata Service Training Manual was built with the pictures rendered at 72 dpi which is ideal for screen viewing For future updates to this manual and more on line information visit our Business Partner Exchange BPX at http bpx okidata com Table of Contents Page Service Guide OKIPAGE 8c 0 Introduction Preface 2 1 Specifications 1 1 Basic System Configuration 3 1 2 Printer Specifications 4 1 3 Option Specifications D 1 4 Basic Specifications 6 2 Operation 2 Operation 7 2 1 Main Control Board PCR PCB 8 2 2 Engine Control Board PX4 PCB 9 2 3 Power Board 10 2 4 Mechanical Processes 11 2 4 1 Electrophotographic processing mechanism 12 2 4 2 Paper running process 13 2 5 Sensors 14 2 5 1 Paper Related Sensors 15 2 5 2 Other sensors 16 2 6 Correction of Color Deviation 17 2 7 Transfer Control according to Environmental Changes 18 2 8 Form Jam Detection 19 2 9 Cover Opening 20 2 10 Toner Lower Detection 21 2 11 Page Size Detection 22 2 12 Power on Processing 23 3 Disassembly 3 0 Parts Replacement 24 3 1 Precautions for Parts Replacement 25 3 2 Parts Layout 26 3 3 How to Change Parts 27 3 3 1 Cover Ass
16. opx okidata com 34 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 7 Limiter 2way L Plate Guide L 1 Remove the plate support assy L and R See 3 3 6 2 Unscrew 2 screws 1 then remove the limiter 2way L 2 and the plate guide L 3 3 Unscrew 2 screws 4 then remove limiter 2way R 5 and the plate guide R 6 Figure 3 3 7 Limiter 2way L Plate guide L 40383701 Limiter 2 way L RSPL 8 3 ltem15 40335001 Plate Guard L RSPL 8 3 Item 17 40383801 Limiter 2 way R RSPL 8 3 Item 16 40335101 Plate Guard R RSPL 8 3 Item 18 Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com 35 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 8 Cover Describes the method of removing the cover assy side L R cover assy OP panel cover front L R and the cover rear L 1 Remove the cover assy rear See 3 3 1 2 Remove the cover assy stacker See 3 3 4 3 Remove the 2 screws 1 then remove the frame side L 2 4 Remove the 2 screws 3 then release the lock of the claw with the cover assy side R 4 lifted a little bit then remove the cover assy side R 5 Detach the operator panel cable 5 from the PCM PCB 6 Open the FDR unit front in the arrow direction
17. 3 to remove the plate sealed 4 Detach the operator panel cable 5 from the PCR PCB PCR PCB requires ten 10 screws for removal 6 Remove the 7 screws 6 to remove the PCR PCB 7 5950 Ue AV xy 9 Wo Z TET e Figure 3 3 9 PCB Assy PCM 40315001 Cover Assy Side R RSPL 8 1 6 Cover Side Frame Side R 40704901 Plate Shield CU RSPL 8 5 43 7 40604802 PCR PCB JRSPL 65 5 Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 37 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 10 Motor Fan 1 Open the top cover 2 Remove the cover assy side R frame side L cover assy OP panel and the cover front R See 3 3 8 3 Unplug the cable 1 and unscrew 2 screws 2 2 collars 4 and then remove the motor fan 3 Figure 3 3 10 Motor Fan 2 54122225 PSW2W3 253 Screw 8 5 18 40197101 5 1 8 5 17 Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 38 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 11 PXF PCB PX4 PCB Since the PXF PCB and PX4 PCB are connected with each other v
18. Assy Contact CL L Assy 64 3 3 38 Contact SB Assy 65 9 9 39 PXC PCB 66 3 3 40 Heat Unit Assy Fuser unit and oil roller 67 9 9 41 Oil Roller Kit 68 3 3 42 Lever Lock Heat L R Guide Side Heat Spring Lock 69 9 9 49 PXL 70 3 3 44 Heat Unit Guide Assy 71 3 3 45 Holder LED Assy LED Head 72 4 Adjustments 4 Adjustments 73 4 1 Maintenance Modes and Their Functions 74 4 1 1 User maintenance mode 75 4 1 2 System maintenance mode 76 4 1 3 Engine maintenance mode 77 4 2 Adjustments after Parts Replacement 78 4 2 1 Confirm the LED head driving time 79 Table of Contents Page 4 2 2 Color Registration Using the Operator Panel Color 80 deviation correction 5 Maintenance Preventive Maintenance 81 9 1 Periodically Replaced Parts 82 9 2 Cleaning 83 9 4 Cleaning the Pickup Roller 84 6 Troubleshooting Procedures 6 0 Troubleshooting Procedures 85 6 1 Troubleshooting Tips 86 6 2 Points to Check before Correcting Image Problems 87 6 4 Preparation for Troubleshooting 88 6 5 Troubleshooting Flow 89 TUN 6 5 1 LCD status message problem list 90 T 6 5 2 LCD message troubleshooting 91 m 6 5 3 Image Troubleshooting 92 Blank paper 93 Vertical black 94 odd Vertical white 95 e Poor fusing Images are blurred or peeled off when 96 touched QH Evenly spaced repeating marks 97 unten Missing characters or colors 98 nm Poor synthesization
19. Connector remover 4076 5305 1 Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 121 OKI Service Guide OKIPAGE 8c Chapter Product Accessory Second Paper Feed 3 2 Parts Layout This section describes the layout of the main components Cover Upper Hopping gear One way Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com 122 Ok a Service Guide OKIPAGE 8c Chapter Product Accessory Second Paper Feed 3 3 Parts Replacement Methods This section describes the parts replacement methods for the components listed in the disassembly order diagram below Idle rollers 3 3 1 AOLT PCB 3 3 2 Hopping motor 3 3 3 Feed roller 3 3 4 Hopping roller 3 3 5 Side frame L assy 3 3 6 Side frame R assy 3 3 7 Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 123 Service Guide OKIPAGE 8c Chapter Product Accessory Second Paper Feed 3 3 1 Idle rollers 1 Remove 16 screws 6 and remove Cover Upper 4 and Cover Lower 5 1 Remove two screws 1
20. Control Handshaking control is performed in each mode Data received from the host is stored in the receive buffer Busy control is performed Signal lead control is performed 6 Timing Charts Data receiving timing DATA 1 8 J LL hia mr OOO my WH Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com 103 co lt ac 5 Z 42 Chapter A Illustrated Parts List Diagram A1 Covers Top amp Sides e 5 co Diagram OKI Part Univerisal Part Number Number Number 51025202 40098401 40187501 40187601 40314801 40315001 0 0 40098301 40314901 40314902 40492601 40098201 40315101 0 0 40195601 40195701 40387201 56636205 50318701 40303601 40449901 40728601 40728701 40664701 Plate Ground Contact Cover Rear Stacker Faceup Support Stacker Cover Assy Stacker Cover Assy Side R Cover Side R Frame Side Right Cover Front R Cover Assy OP Panel Cover Assy OP Panel OEL INT 230V Cover Sub Assy OP Panel Cover Front L Cover Assy Side L Cover Side L Cover Knob Frame Side L Cover Rear L PCB PCO CABLE OP Screw Guide Eject FD Assy Cover Sub Assy Stacker Film Waste Toner Foam Seal Cover Spring Support Copyri
21. Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Printout colors different from original colors Is each LED head lens contaminated Yes No Na Y as Yes No Yes Yes Yos No No Yes No Yes Yos No Clean the LED head lens Is each LED haad assembly connected to the junction board PCB correctly Check the connection af the cables between each LED head and the junction board or connect Ine LED head cables to the junction board carrectly Is 3 3 on the following pins of the HEADPOW connector of the junction board PRE PCB being supplied 3 3V Pin 1 2 3 4 5 6 Is 3 3 Being supplied to each LED head assembly fram the junction board FOS PCR Pins 1 2 3 4 5 and 6 of the YPOW connecter for the yellow LED head assembly Pins 1 2 3 4 5 and 6 of the MPOW connector for the magenta LED head assembly Pins 1 2 3 4 5 and 6 of the CPOW connector for the cyan LED head assembly Pins 1 2 3 4 5 and 6 of the BPOW connecter for the black LED haad assembly Replace the junction board PD6 Check the connection of the cables or replace the LED head assembly is 4 3 3V on the Taltewing pins of tha HEADPOW connector of the engine board PX4 POR being supplied T3 3V hn 1 2 3 4 5 6 Replace the HEADPOW Is 3 3V an the following pins of tha
22. Normal operation This message is cleared when the toner cartridge is replaced Normal operation This message is cleared when the specified drum is replaced After the drum is replaced its drum counter must be reset See the user s manual Normal operation This message is cleared when the Fuser Unit is replaced After the fuser unit is replaced it s counter must be reset See the user s manual BELT LIFE Undefined ON Indicates that the end of life of the Transfer Belt has been reached Undefined Undefined Undefined Undefined OFF OFF OFF Clears the data left unprinted in the buffer and initializes the printer to the user default status The temporary DLL macro and user patterns are deleted Prints out a demo page RESET OFF OFF PRINT DEMO PAGE Undefined Undefined Undefined Undefined Blink or Undefined This operation is started by a command when the READY LED is onorbya switch when the READY LED is blinking Prints out a menu setting PRINT MENU Undefined Undefined Undefined Undefined Blink or Undefined This operation is started by a command when the READY LED is on orby a switch when the READY LED is blinking Normal operation This message is cleared when the transfer belt is replaced After the Transfer Belt is replaced its counter must be reset See the user s manual Normal operation Normal operatio
23. Type C1 Yellow Image Drum Kit Type C1 Cyan Image Drum Kit Type C1 Sheet Insuration Screw PSW2W3 30C Hand hopper Assy FDR Unit Main Assy CONN Cord Wire CONN Cord Wire Waste Toner Box Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 105 Ok a Service Guide OKIPAGE 8c Chapter A Illustrated Parts List Diagram A3 Main Chassis Unit 1 Diagram OKI Part Univerisal Part Part Number Number Number Description 40175701 40096401 40135301 50808201 40450401 40171401 40171301 40308801 40290201 40163401 40163701 40163702 40163501 40163601 40383701 40383801 40335001 40335101 40171201 40144501 40437601 40130801 40310601 40303301 40261301 40130301 51608901 51607301 40250901 40164501 40164301 40171101 40388501 40195101 40195001 40175201 40563101 50318601 40162101 40175101 40449401 40449701 40097301 40144301 40144401 40189601 40450201 40408601 40264401 50608118 40447201 40388401 40446501 40162201 40172401 40437501 40171801 40447301 40303201 40303101 40302901 40164801 40448501 40551301 40714401 40743701 40686701 40661001 40661501 40671001 Plate Base Guide Belt F Photo Interrupter Lever Paper End Sensor Assy Box Toner Frame Side L Frame Side Contact SB Assy Plate Blind Gui
24. Yes Clean the LED head lens No ls each LED head assembly connected to the junction board PDS earrecthy Cannact the LED head assembly to the Resection board PDa PCB correctly Wes Check the connection of the cables or replace the LED head Is tee problem racovered Yes End Na Check the connection el the cables ar regtace the board POE PCB Ie re problem recovered Yes End Na js engine beard PX4 connected 10 the unction board correctly Ma Connect the boards correctly Yes Check tha connacbon of The cables or the engine board PCB 15 tha problem zecaveredg Yea End Ma Is each terminal o each enage drum connected tha contact asiani correctly See Figure 6 2 Make the terminals be im contact with the contact assembly correctiy Replace the the image drum unit Hotes 1 When replacing the engine board PX demaount fe EEPROM chip fren the eld engine board and remaount it on the new one 2 Alter replacing the image drum unit be aure to reset its counter in the User Masmtenance mode 4 Alterraplacingthe LED head assembly be sure to adpust its diva time and correct as cotor deviation Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 96 OKI Service Guide OKIPAGE 8c
25. a A prisu euo gi ie Addins sieppaa GS EOWSH dPloOY 3H dEL dol del MOOD del MOdN Adds dhi HAH dPLOQNN 03A MH dugbatexper LE Tid pacer HEKS LO FR gif s dume 18 Functional Block Diagram Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com 8 Ok a Service Guide OKIPAGE 8c Chapter 2 Operation 2 1 Main Control Board PCR PCB The control board consists of a CPU NR4700 block a memory control LSI block an interface control LSI block a DRAM block an EEPROM block a mask ROM block and an interface block Here is the Functional Block Diagram of the main control board PCR PCB Memory controller ROM Flash 32M 22 SysAD 84 94704 D HAM Max 80M 64 NR4700 100 __ WDATA 1 IESYNC 4 Control SysAD Operator SysCmd 4 panel Ses SSS ee me ee Contral ExtReq EEPD EEPCS1 uPUBG044 Not installed GN 014 LMU ___Extermal Agent 74ACT1284 Control INT REQ OSC Reset circuit DI
26. program ROM on the main board PCR PCB or the main board itself When replacing the main board PCR PCB or the main board itself When replacing the main board PCR PCB remove the EEPROM chip and proms from the old main board and mount it on the new main board Power off then power on the printer If this error still occurs replace the main board PCR PCB proms from the old main board and mount it on the new main board Undefined Undefined Undefined Undefined Undefined Undefined Undefined OFF Undefined OFF Blink Blink 40 50 Indicates that an error was found in the EEPROM by the EEPROM check Indicates that an error was found in the optional ROM by the optional ROM check Power off then power on the printer If this error still occurs replace the EEPROM on the main board PCR PCB or the main board itself When replacing the main board PCR PCB remove the EEPROM chip and proms from the old main board and mount it on the new main board Power off then power on If this error still occurs replace the optional ROM on the main board PCR PCB or the main board itself When replacing the main board PCR PCB remove the EEPROM chip and proms from the old main board and mount it on the new main board 91 Ok a Service Guide OKIPAGE 8c Chapter 6 Troubleshooting Procedures 6 5 2 LCD messag
27. that a printer language which is not available has been specified by the PCL command Displays the number of copies being printed when the number of copies being printed is two or more Indicates that Toner sensor is abnormal when page counter is above thirty The LED of the color lights To clear this message press the RESET switch To clear this message press the RESET switch Normal operation Normal operation When CLEARABL E WARNINGS On the menu is set to ON press the RECOVER switch to clear the message Normal operation This message is cleared when the drum is properly positioned or sensor level which is exchanged corresponds to the LED color lights FUSER LIFE Undefined POWER SAVING Undefined Undefined ON TNH LOW kkkkkkk Undefined Undefined ON ON Undefined Undefined ON ON Undefined Undefined Undefined Undefined Undefined Undefined ON or Blink ON ON Indicates that the page printer is in Power Save Mode in which the fuser is powered off Indicator that toner of the specified color is running out However when LOW is set to OFF the ATTENTION indicator blinks Indicates that the end of life of a specified color drum has been reached The LED of the color lights Indicates that the end of life of the Fuser Unit has been reached Normal operation
28. that paper coming out of the tray jammed Open the cover and remove the paper jam from the inside of the printer When the cover is opened and closed this error is reset and printing resumes tttttt Tray type Tray 1 Tray 2 or Front If this error occurs frequently go to Section 6 5 2 Open the cover and remove the paper jam from the inside of the printer When the cover 15 opened and closed this error is reset and printing resumes Indicates that paper jammed exiting the printer If this error occurs frequently go to Section 6 5 2 Indicates that the HSP recovers interface automatically card is being when reset resetting is complete The page printer JAM 001 Error Undefined Undefined Undefined Undefined Blink Indicates Notifies that that Process the power error occurred reset due to line noise etc process error Open cover and remove the paper Close cover to recover and proceed ERROR HOST Undefined Undefined Undefined Undefined I F OKI xx OFF Blink Indicates This page that a fatal printer OKI HSP recovers interface from the error has error when occurred Xx 10 itch 1 Interface timeout this error occurs Xx 20 frequently Initialization the failed 10 OKI HSP seconds interface after the card or the page printer main board is powered PCR on Xx 21 It takes 3 seconds or more before the RUN
29. the cover assy side R and the cover rear L See 3 3 8 Detach the cable 1 we JI Remove the holder inlet 3 by unscrewing 2 screws 2 then remove the power switch 4 and unplug the AC socket 5 5 Draw the power supply unit 7 by unscrewing 2 screws 6 then unplug the cable 8 Figure 3 3 16 Power Supply Unit Holder Inlet Sheet Insulation 7 40018901 Power Unit ACDC Switching 120V 8 2 485 40019001 Power Unit Switching 230V RSPL 8 2 5 Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com 44 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 17 Sensor Assy Box Toner 1 Remove the power supper unit See 3 3 16 2 Unscrew the screw 1 then remove the sensor assy box toner 2 together with the bracket 93 3 Unscrew the screw 4 then remove the sensor assy box toner 2 14 Figure 3 3 17 Sensor Assy Box Toner 2 40450401 Sensor Assy Toner RSPL 3 40450201 Bracket Switch RSPL 8 3 Item 47 Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 45 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 18 Square s
30. 2 7 Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 49 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 22 Manual Feed Hopper Assy 1 Open the manual feed hopper assy 2 Release the engagement between the holder and the link then remove the manual feed hopper assy Be careful not to damage the holder 9 Figure 3 3 22 Manual Feed Hopper Assy Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com 50 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 23 Guide Paper Input Assy 1 Remove the cover assy OP panel cover front R ad the cover front L See 3 3 8 Remove the feeder unit front See 3 3 21 Unscrew 4 screws 1 then draw out the guide paper input assy 2 from the left side by rotating its upper part Be careful not to damage the lever sensor resist Lever Sensor Resist ES E Li rrr i r DLE Figure 3 3 23 Guide Paper Input Assy 2 140303301 Paper Input assy RSPL 8 3 24 40097301 Guide Paper Input RSPL 8 3 43 40144301 Lever Input Sensor RSPL 8 3 44 40144401 2
31. 42 7 Duiddou eau omo a we u MEN a Ajddns Jamod abeyor moy aq asuen Ajddns amod uiu yaq ajja Iso q Jasny re Jey Ol sibel yaq Jala uauid dn 28101 Burugar sayjou A g l pEBH 13 1 183285 1 Paper hopping and transfer up down movement of pinch roller 2 Paper is hopped and delivered by the mechanism shown below This mechanism is driven by a single pulse motor Hesist roller 2 One way gear C Hesist roller 1 Idle gear C One way gear B Idle gear gear First hopping roller Pulse motor One way gear The pulse motor turns in the arrow direction a and drives the hopping roller in the direction of b The hopping roller drives the resist roller Gears A B and C have one way clutches to prevent the roller form rotating reversely a Hopping 1 The pulse motor turns in the arrow direction of a counterclockwise and drives the hopping roller to move the paper until the Entrance sensor turns on Although the one way gears B and C are driven the resist roller 2 does no turn The reverse rotations of the one way clutch gears are not transmitted to the resist roller 2 After the Entrance senso
32. 7 Remove the 2 screws 6 then remove the cover assy OP panel 7 8 Remove the 2 screws 8 with the cover front R 9 pushed up then release the lock of the claw then remove the cover front R 9 Remove the 2 screws 10 then remove the cover front L 11 10 Remove the 2 screws 12 then remove the cover rear L 13 11 Pull off the film 15 glued on the cassette guide 12 Release the engagement with the guide by lifting the cover assy side L 14 then remove the cover assy side L Pushed Up FDR Unit Front Figure 3 3 8 Cover 40492801 Sub Assy RSPL 8 411 4038 7200 PCOPCB 5 8 56636205 238100500517 11 40098201 Cover Front L 7 8 482 1 JCovr Side RSPR _ 6 440 1056 1 20624 fames 00 00 0000 Frame Side Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 36 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 9 PCR PCB Assy 1 Open the top cover 2 Remove the 2 screws 1 and release the lock of the claw by lifting the cover assy side R 2 a little bit then remove the cover assy side R Remove the 2 screws 8 to remove the plate shield CU 9 Remove the 3 screws
33. Check the connection of the cable er replace the low voltage power supply End Cantal Receive Dala from Parallel Inlartace Is PARALLEL in menu 11 sel 10 ENABLE No Sel the PARALLEL in menu 1 to ENABLE Yas Is Parallel interface of Ie nost computer sat to Bidirectional Cormmunicalion Yes Sel the Bidirectional Communication of Parallal Interface menu 2 to ENABLE cal the Bidirectional Communication of Parallel Interface in menu 2 to DISABLE Is Data printed out Yes End No Parailei interface cable connected correctly Connect the cable correctly Y as Check the connection of the parallel interface cabe for wire discannections or bent pins Is rt recovered Mo Replace the parallel interface cable Yas Replace the main board PCR or check hardware and software of the host commuter Cannot Receive Data from ORKI Interface Is ORI HSP FF board connected correctly to the main board PCR No Connect the OKI LF board correctly to the main board PCR PCB YS Is thera Any bent of broken pin on the OFF HSP VF board Yes Heplace the OK HSF FF board Replace the main board Repaired Yes End The OKI HSP VF board may be not defective Check the settings of the host computer or ihe connection of the interface cables and the others Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the
34. Heplace the main board Does a voltage of 5V are being supplied on the Power connector of the engine board PX4 PEE Pin 11 12 13 14 5V Ping 4 5 6 23 24 5 26 27 28 29 30 OV Mo Checkthe connection of the power connector or replace the low voltage power supply unit Replace the engine board Do tha folowing voltages are being supplied on the PU connector of the main board Pin 15 26 35 45V Fin 2 22 43 3V Pin23 12V 25 12V Pin 1 3 5 11 20 21 40 OV the main board Do the fellewing voltages are being suppled on the power connector of tha engine board Pin 11 12 13 14 5 Pin 15 16 17 18 3 3V FPin1 12V Pinz 12V Pin 7 8 9 10 32V Pin 3 4 5 6 23 24 25 26 27 28 29 30 OV Yes Replace the engine board Replace the low voltage power supply unit Do tha following voltages are being supplied on the PU connector of the main board Pin 15 26 35 45V Fin 2 22 43 3V Pin23 12V Pin 25 412V Pin 1 3 5 11 20 21 40 OV the main board Do the folowing voltages are being suppbled on the power connector of tha engine board Pin 11 12 13 14 45V Pin 15 16 17 18 3 3V 1 12V Pinz 12V Pin 7 8 9 10 32V Pin 3 4 5 6 23 24 25 26 27 28 29 30 OV Yes Replace the engine board Replace the low voltage power supply unit the regist motor rotates properly Yes Replace the feed roller
35. LCD Status LED LED LED LED ATTENTI Trouble Remedy Message K C M Y ON or Status ERROR PAPER Undefined Undefined Undefined Undefined OFF Blink Indicates Check the SIZE CHECK ttttt that wrong size of paper size paper the tray or was fed from whether two the specified or more tray paper sheets are fed ata Tray time type Tray 1 When the Tray 2 or Cover is Front opened and closed this error is reset and printing resumes If this error occurs frequently go to Section 6 5 2 Category Paper Jam Error Table 6 1 LCD Status LED LED LED LED ATTENTI Trouble Remedy Message K Y ON or Status PAPER INPUT Undefined Undefined Undefined Undefined OFF Blink Indicates Check the JAM CHECK tttttt that a paper size of paper jam occurred in the tray or when paper whether two feeds from more the specified paper sheets tray were fed at a time When Tray the cover is type Tray 1 opened and Tray 2 or closed this Front error is reset and printing resumes If this error occurs frequently go to Section 6 5 2 PAPER FEED JAM tttttt Undefined Undefined Undefined Undefined PAPER EXIT JAM REMOVE THE PAPER Undefined Undefined Undefined Undefined Category Interface Error Table 6 1 LCD Status LED LED LED LED READY ATTENTI Trouble Remedy Message K C M Y ON or Status OKI HSP I F CARD RESETTING Undefined Undefined Undefined Undefined Indicates
36. Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 28 Paper End Lever 1 Remove the guide paper input assy See 3 3 23 2 Remove the paper end lever 1 by releasing the engagement with the guide Figure 3 3 28 Paper End Lever 50808201 4PP4076 5154P001 Lever Paper End RSPL 8 3 4 Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 56 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 29 PCO PCB Operator Panel 1 Remove the cover assy side R and the cover assy OP panel See 3 3 8 Unscrew 4 screws 1 and unplug the operator panel cable 2 Remove the PCO PCB 3 by releasing 6 claws Be careful not to drop the LCD Liquid Crystal Display 4 and 5 which are detached together Claw six EA 3 3 29 2 56626205 2381005 0005 Cable HCUN 1 25 6F 440 1056 RSPL 8 1 19 B M1 20624 3 140387201 A PCOPCB RSPL 8 1 18 40492601 Cover Sub Assy Op Panel RSPL 40314901 Cover Assy Op Panel 8 1 10 Includes 3 6 Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com 57 Ok a Servi
37. POWER connector of tha engine board PX4 PCB being supplied Tr3 3V Pin 15 16 17 18 Replace the engine board Check the connection of tne cables or replace the low voltage power supply Is the problem recovered End Is 32 V on the power connector of the engine board PX4 PCB being supplied 3e V Pin 7 8 9 10 Check the connection of the cables or replace the low voltage power supply Is 32V on pin 2 of the HVOLT connector of the engine board PX4 PCB being supplied Replace the engine board Chack the connection of the cables reptace the high voltage power supply or bell cassette assembly is the problem recovered End Is Each terminal of each image drum unit connected tothe contact assembly correctiy Sea Figure 6 3 B 42 Service Guide OKIPAGE 8c Chapter 6 Troubleshooting Procedures Page Y as Motes 1 2 d the termmals be in contact with Ine cantact assembly carrectly Heplace the the image drum unit When replacing the engine board Px4 demount tha EEPROM chip fr m tha cid engine board and remount on the new one Alter replacing the image drum unit and the belt cassette assembly be sure to reset their counters in the User Maintenance moda Alter replacing tha LED head assembly be sure to its drive lime and correct its calor Geviation Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Par
38. Remove the contact BL R assy and contact CL R assy See 3 3 36 Remove the contact BL L assy and contact CL L assy See 3 3 37 Hemove the hopping motor See 3 3 19 Remove the motor assy BT See 3 3 15 Remove the gear heat assy See 3 3 12 Remove the roller assy hopping See 3 3 25 Remove the holder gear toner assy See 3 3 30 Remove the high voltage power supply unit See 3 3 33 Unplug the inlet AC See 3 3 16 Unscrew 9 screws 1 then remove the guide cassettes L 2 and R 3 together AR Unscrew the screw 4 then remove the switch 5 Unscrew the screw 6 then remove the PXC PCB 7 m 40302901 Guide Cassette R Assy RSPL 8 3 61 8 7 1 50928901 4PP4076 5306P001 Spring Detector RSPL 8 7 2 40368301 RSPL 8 7 5 Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BP X for any updates to this material http opx okidata com 67 Om a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 40 Heat Unit Assy Fuser unit and oil roller 1 Open the stacker cover 2 Release the lock by turning down the lever lock heat guides blue on both sides then lift the fuser unit assy 1 and remove it Lever Lock Heat Guide Figure 3 3 40 Heat Unit Assy 1 40490901 Unit Fuser 120V OP8c RSPL 8 2 21 4049090
39. Yes Check the connection of the cables or replace tha LED head assembly s the problem recovered Yes Check the connection of tha cables or replace the junction board PCB Recovered Yes Erd Is engine board connected to the junction board FDS PCB corractly Connect the engine board to the junction board correctly Check the connection of tha cables or replace the engine board P4 PCB E the problem recovered Yes End Is Each terminal of image drum uniteonnected te the contact assembly correctly See Figure 6 2 Mo the terminals be in contact the contact assembly correctly Replace the the image drum unit Moles 1 When replacing the engine board PX4 PCB demount the EEPROM chip Irom the old engins board and remount it on the new one 2 After replacing the image drum unit be sure to reset its counter in tha User Maintenance 3 After replacing the LED head assembly ba sure to adjust its drive time and correct its calor deviation Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BP X for any updates to this material http bpx okidata com Page 94 OKI Service Guide OKIPAGE 8c Chapter 6 Troubleshooting Procedures Vertical black w Bleck stripe or lines in the vertical direction Is gach LED head assembly connected to this junction b
40. a constant rate the stirring bar and the magnet on the stirring bar The stirring bar rotates by engaging with the concave section in the stirring gear joe d Magnet Stirring Bar Stirring Gear e Operation Toner Low is detected by monitoring the time interval between engagement of the magnet set on the sensor lever and the magnet on the stirring bar OPERATION during toner full state String Gear Section e he stirring bar rotates by interlocking with Stirring Bar the stirring gear e When the magnet on the stirring bar reaches its maximum height the other end of the bar is dipped in the toner The stirring bar is pushed by the stirring gear Sensor Lever Toner Sensor Operation during toner low state e When the stirring bar reaches the maximum Mid height the lack of toner provides no resistance on the other end The bar falls to the minimum height due to its own weight e The time length of the encounter between the stirring bar magnet and the sensor lever magnet counter with the magnet of the sensor lever becomes long By monitoring this time interval toner low is detected Sansor Lawes TONER FULL state THASNS ey I1 0 74 SEC Y 1 1 165 SEC IM C t 1 365 SEC TONER LOW state TNRSNS d 1 F i ti gt 0 74 SEC Y 1 965 SEC 1 gt 1 165 SEC M e When the toner low state is detected 2 times consecutively Toner Low is established When the toner full state
41. for any updates to this material http bpx okidata com 4 Ok a Service Guide OKIPAGE 8c Chapter 1 Specifications 1 2 Printer Specifications This printer unit is composed of the following hardware Electro photographic processor Paper feeder Controller CU part PU Part Operator panel Power board High voltage part PU part This diagrams shows the printer unit configuration Stacker Cover Assy Face up Slacker Assy lF Cover Assy Operator Panel Assy Side Cover LY ASSY Printer Unit Configuration Diagram Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 5 Ok a Service Guide OKIPAGE 8c Chapter 1 Specifications 1 3 Option Specifications The OKIPAGE 8c options are listed below 1 Second Paper Feeder 2 RAMM SIMM module 72 pin SIMM 4MB 8MB 16MB 32MB e Make sure to use a set of 2 of the same volume size modules Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com OKI Page 6 Service Guide OKIPAGE 8c Chapter 1 Specifications 1 4 Basic Specifications 1 Dimensions 2 Weight 3 Form Type Sizes Reams 4 Printing speed 5 Resolution 6 Input vo
42. is initializing after the page printer is powered On ui LINE und uni ul undi is Normal in on line ro LINE undi The printer is Normal in the off line operation mM ul ul Undefined Displayed Normal while the operation page printer is printing PROCESSING Undefined Undefined Undefined Undefined Blink Undefined Normal while the operation page printer is receiving data or performing the output processing DATA PRESENT Undefined Undefined Undefined Undefined Undefined Undefined Indicates that the data operation remains unprinted in the buffer RESET TO Undefined FLUSH RESET TO SAVE Undefined FLUSHING JOB Undefined PS NOT AVAILABLE Undefined Undefined Undefined Undefined Undefined COPY nnn mmm Undefined Undefined ON TNH SNS ck xA Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined ON OFF Blink Undefined Undefined Undefined Undefined Undefined Undefined When this message is displayed data remains When this message is displayed data remains unprinted in the buffer off line This message prompts the user to press the RESET switch to cancel the data indicates that the data to the end of processing is being canceled Indicates
43. mode starts or the page printer received a Run Mode command in the power on mode 22 HSP PC communicati on error Category Controller Error Table 6 1 LCD Status LED LED LED LED READY Trouble Remedy Message K C M Y ON or Status EEPROM Undefined Undefined Undefined Undefined OFF Blink Indicates Set the RESETTING that the default identification values in number of EEPROM EEPROM is and it will be invalid recovered automatically ERROR Undefined Undefined Undefined Undefined Blink OFF Indicates Simplify the POSTSCRIPT that the pages interpreter detected one of the errors given below The data coming after this error is recovered until the end of the command When the reception of the command is message is reset automatically Invalid PostScript command The page is complicated and the vertical memory is full XX Category Interface Error continued Table 6 1 LCD Status p ps p es READY ATTEN Code Trouble Remedy dme TION P Status Details of Remedy error ERROR Undefined Undefined Undefined Undefined Undefined Undefined Undefined OFF Undefined OFF Blink Blink 10 30 Indicates that an error was found in the program ROM by the program ROM check Indicates that an error was found in the resident RAM by the resident RAM check Power off then power on the printer If this error still occurs replace the
44. normal Rated voltage D 03V to 0 25V Y as Haplaca the angine baard Halrgeniamp Backup raliar tharmistor Replace the fusing unit Is AC vollage appears between pins 1 and 3 of the connector of the low vollage power supply Replace the low vollage power supply Replace tha fusing unit Lower part of tha fusing unil amp Fan Motor Error is the Low voltage power supply fan rotating after the page printer is powered Yas Yas Yas Yes Yes Yes Is 227 being supped on the FU2 of tha engine board PX4 PCB Ma 32V being supplied on the power connector of the engine board PX4 FCB 3eVv Pin 7 8 9 10 Check the connection of the cable or replace the low voltage power supply Yes Replace the engine board Is the resistance about 700 ohms of the low voltage power supply Tan about 700 ohms No Replace the Tan of the low voltage power supply Check the connection af the cable er replace the low voltage power supply Is the Engine board fan rotating alter the page printer powered on again 321 being supplied on the FU2 of tha engine board PX4 PCB 32V on the power connector of the engine board PX4 PCB Pin 7 8 9 10 Check the connection of tha cable or replace the low voltage power suppty Yes Replace the engine board Is tha resistance about 80D ohms of the engine board about 800 ohms No Replace the fan of the engine board
45. obtain the form size measure the time interval from when the front edge of the paper passes the Write Sensor until the rear edge of the paper passes the Form Feed Sensor 2 A Form Size Error occurs when the specified length is exceeded by 45 mm Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 20 Ok a Service Guide OKIPAGE 8c Chapter 2 Operation 2 9 Cover Opening When the upper side or front cover of the OKIPAGE 8 is opened the Cover open microswitch turns off the voltage of 32V to the high voltage power supply is shit off and all high voltage outputs are shut off At the same time the CPU receives a signal CVOPN indicating the status of the microswitch and performs the cover open process Uppercover Side cover Front cover PX4 PCB eee D CPU l pes MK 65524 COVOPN 2P p47 le High voltage power supply board HVOLT 18 High voltage power supply unit Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 21 Ok a Service Guide OKIPAGE 8c Chapter 2 Operation 2 10 Toner Lower Detection e Composition The device consists of the stirring gear which rotates at
46. okidata com 130 OKI Service Guide OKIPAGE 8c Chapter Product Accessory Second Paper Feed 4 0 Troubleshooting 4 1 Precautions Prior to the Troubleshooting 4 2 Preparations for the Troubleshooting 4 3 Troubleshooting Method 4 3 1 LCD Status Message List Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 131 Service Guide OKIPAGE 8c Chapter Product Accessory Second Paper Feed 4 1 Precautions Prior to the Troubleshooting 1 Go through the basic checking items provided in the Printer Handbook 2 Obtain detailed information concerning the problem from the user 3 Check in conditions similar to that in which the problem occurred Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 132 Ok a Service Guide OKIPAGE 8c Chapter Product Accessory Second Paper Feed 4 2 Preparations Prior to the Troubleshooting 1 Display on the Operator panel The status of the problem is displayed on the LCD Liquid Crystal Display on the Operator panel Go through the appropriate troubleshooting procedures according to the messages displayed on the LCD Copyright 1998 Okidata Division of OKI America Inc
47. or colors Is gach LED head lens contaminated Yeas Yes Yes Mo Yes Mo Yes Yes Yes Mo Yes Yes Clean the lens of LED head ls each LED head assembly connected to the junction board PD6 PCB correctly Check the connection of the cables between each LED head and the junction board of connect tha LED head cables to the junction board correctly Is 2 34 on the following pins of the HEADPOW connector of the junction board PD6 being supplied 3 3V Pin 1 2 3 4 5 6 5 3 3V being supplied to each LED head assembly from the junction board PD6 PCB Pins 1 2 3 4 5 and 6 of the YPOW connector for the yellow LED head assembly Pins 1 2 3 4 5 and 6 of the MPOW connector for the magenta LED head assembly Pins 1 Z 3 4 5 and 6 of the CPOW connector for tha cyan LED haad assembly Pins 1 2 3 4 5 and 6 of the BPOW connector for the black LED head assembly Replace the junction board PDE PCB Check the connection of the cables or replace tha LED head assembly 5 3 3V being supplied on the folowing pins of tha HEADPOW connector of the angine board PX4 PCB being supplied 3 3V Pin 1 2 3 4 5 6 Replace tha HEADPOW cable Is 3 3V on the fallawing pins of the POWER connecter of the engine board PX4 PCB 3 3 Pin 15 16 17 18 Replace the engine board Check the connection af the cables or replace the low voltage powe
48. or the paper separation frame assembty of the paper cassette Yes Yes Is the resistance of the regist motor about 7 1 ohms Replace the regist motor 5 321 being supplied on the of tha engine board Replace the low voltage power supply Check the gear engagement and ihe connection of the cables replace the engine board 27 Paper input jam Front feeder Is the paper jam immediately occur after The page printar is powared on Yes Na Yes Yes Yea Yea Yes Yas is tha paper jam occur FF sensor 2 Yeo Remove ite paper jm Do the sensor levers FF sensor 2 work right Replace the defective sensor lever FF sensor 2 J Do tha sensor FF sensor 2 work right Operate each sensor lever and check signal on the related pin of the FSENS connector of the junction board PXF PCB3 Pin 4 for FF sensor 2 Mo Check the connection of the signal cable or replace the sarsar beard PAM Is tha junction beard PAF PCB operation properly Operate each sensor laver and check its signal on the related pin of tha PXFIF connector of the junction board PXF PCB Pin for FF sensor 2 Mo the junction board PXF PCB Check the connection of the cables between the junction board PAF PCB and the engine board P X4 PCB or replace the engine board Is ihe paper jam immediately occur after paper feeding Does the paper reac
49. the resist roller 2 This operation corrects any paper skew One way clutch gear B Idle gear Cam Hopping roller Sensor Pickup roller 2 j F P mac P Form sensor Idle gear B j Entrance sensor 2 One way clutch gear Paper from front feeder Reset roller 2 c Conveying 1 After paper hopping is completed the pulse motor turns right in the direction of b to drive the resist rollers 1 and 2 The resist rollers feed the paper until the Form sensor turns on 2 Although the one way gear is also driven the first hoping roller does not turn because of the one way clutch Resist roller 2 One way gear First hopping roller 2 Up down movement of the image drum unit and rotation of the image drum The up down movement of the image drum unit and the rotation of the image drum are performed by a mechanism shown below See Figure 2 6 a This mechanism is driven by a single pulse motor When the pulse motor turns left Counter clockwise the up down gear turns left in the direction of a and the up down lever see Figure 2 6 b moves up in the direction of a The up down lever pushes up the up down actuator of the image drum unit The image drum unit moves up as shown in Figure 2 6 b The image drum rotates freely EP drum gear Up down gear When the pulse motor see Figure 2 6 a turns right Counter clockwise the image drum gear turns left Count
50. 001 0 40135301 40448901 40664501 40583901 40704901 40447201 Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Gear Heat Assy Motor Assy Belt Main Motor A Assy Main Motor B Assy Gear Oneway Z30 LEVER UP DOWN 2 YMC Bracket Hopping Motor Gear Idle 92 Gear Feed 118 17 Gear Oneway Z48 74 Motor Pulse ID PCB PX4 Engine PCB PXF Cover CU PCB PCR Main Plate Sealed Motor Fan Screw Board IF AMP8P AMP4PX2 JST12 AMP15 AMP10 AMP9 AMP12P AMP3PX2 AMP8P AMP4PX2 AMP12P AMP3PX4 AMP14P AMP3PX4 AMP7P AMP7P AMP6P AMP4P HCUJ 1 25 16F 300 AMP 12 AMP4 3X2 Cordwire JST6P AMP3PX2 Connector Cord JST8P JST8P AMP8P AMP2PX4 PS SIMM DRAM SIMM Network Card Belt Motor Mech Assy Unknown Photo Interrupter Gear Heat Mech Assy LEVER UP DOWN 2 Plate Earth LKR Plate Shield CU CONN Cord Wire 108 Ok a Service Guide OKIPAGE 8c Chapter A Illustrated Parts List Diagram A6 Frame Upper Assy Number Number Number Description 1 40187901 Frame Upper 40449101 Holder LED Assy 40187801 Guide Holder 40293601 Spring Head 40197701 Spring EP 40536001 PCB PD6 Board 40394201 Plate Oil Sensor 40171702 AMP2P MSW 40408601 Holder Switch 40449301 Plate Support L Assy 40197401 Torsion Spring A 40449201 Plate Support R A
51. 1 Remove the shaft link See 3 3 35 Removal of the contact BL L assy 2 Unscrew 2 screws 1 then remove the contact BL L Assy 2 Removal of the contact CL L assy 3 Unscrew 2 screws 93 then remove the contact CL L assy 4 Contact CL L Assy Contact BL L Assy Figure 3 3 37 Contact BL L Assy Contact CL L Assy 2 40324501 Contact BL L Assy RSPL 8 4 1 p includes 0 0 Contact CL L Assy BAM A BohhPats A Both Parts Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 65 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 38 Contact SB Assy Remove the contact BL L assy and contact CL L assy See 3 3 37 Unscrew 3 screws 1 then remove the plate blind 2 Unplug 7 codes 3 gw Unscrew 3 screws 4 then remove the contact SB assy 5 Figure 3 3 38 Contact SB Assy 2 40290201 Plate Blind RSPL 8 3 9 5 40308801 Contact SB Assy RSPL 8 3 8 Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 66 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 39 PXC PCB
52. 19 2 Remove the spacer 4 first and release the locks with the shaft by spreading the claws of the gear one way 91 92 and 3 then remove the gear one ways Figure 3 3 20 Gear One way 4 140686701 Register Gear RSPL 8 3 67 1 140164301 Gear One way 248 RSPL 8 3 31 2 40164501 Gear One way 248 48 RSPL 8 3 30 3 140250901 Gear One way 96 RSPL 8 3 29 Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com 48 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 21 Feeder Unit Front 1 Remove the cover assy side R cover assy OP panel cover front R and the cover front L See 3 3 8 Remove the cover CU See 3 3 11 Unplug the cable 1 and unscrew the screw 2 then remove the bracket FF shaft 3 Remove 2 E rings 4 then remove the feeder unit front 5 or pf Unscrew each 2 screws 6 then remove 2 bracket FF links 7 Figure 3 3 21 Feeder Unit Front 1 140641801 Conn Cord Wire RSPL 8 2 29 3 140193601 Bracket FF Link RSPL 8 2 7 5 40311201 FDR Unit Front RSPL 8 2 6 ___ 1 1414000 55700401 2PA4128 1076G001 Hopper Manual RSPL 8 2 26 Feed Assy 140449001 FDR Unit Main Assy RSPL 8 2 27 7 40193501 Plate FF Link RSPL 8
53. 3 9 HEAYVY 3 4M 4V ULTRA HEAVY 3 4V 4 1 V TRANSPARENCY delat valua 3 4V 4v Mo Replace the tusing unit assembly Yas Replace the tusing unit assembly Noles 1 When replacing tha engine board PCB demount tha EEPROM chip from the ald engins board and remount on the new ona 2 Alter repiacing the mage drum unit the fusing and tebalt cassetta assembly be sura to rasel their counters in tha User Maintenance mode 3 Alter replacing tha LED head assembly be sure ta adjust its drive tithe and correct its color deviation Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 97 Ok a Service Guide OKIPAGE 8c Chapter 6 Troubleshooting Procedures Evenly spaced repeating marks Possibly defective part 4 2 mm Replace the image drum unit 4 0 mm Developing Roller Replace the image drum unit 8 3 mm 8 3 mm 14 mm Note After replacing the image drum unit the fusing unit and the Transfer Belt cassette assembly be sure to reset their counters in the User Maintenance mode Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com 98 Service Guide OKIPAGE 8c Quid Chapter 6 Troubleshooting Procedures Missing characters
54. 4 Unit Fuser 220V OP8c RSPL 8 2 21 0 Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 68 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 41 Oil Roller Kit 1 Remove the heat unit assy See 3 3 40 2 Release the lock by turning down the lever in the arrow A direction then slide the oil roller assy 1 with its right side lifted and remove it Figure 3 3 41 Oil Roller Kit 1 40645301 Oil Roller Kit Consumable Je2 42 Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 69 Om a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 42 Lever Lock Heat L R Guide Side Heat Spring Lock Removing methods for right side and left side of each part are the same Here describes the method for right side 1 Remove the heat unit assy See 3 3 40 Unscrew 2 screws 1 then remove the guide side heat 2 Remove the E ring 3 then lever lock heat R 4 Be careful not to lose the spring lock 5 which slips off together Figure 3 3 42 Lever Lock Heat L R Guide Side Heat Spring Lock 4 8 3 14 5 40163701 Spring Lock Heat L RSPL Copyright 1998 Okidata Division of
55. 8 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 61 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 34 Eraser Bracket Assy Eraser Bracket KCM Assy 1 Remove the belt cassette assy See 3 3 32 2 Open the stacker cover 3 Remove four screws 5 and then remove the Plate Blind 6 Removing the eraser bracket assy 4 Remove the screw 1 and the connector 2 5 Release the screw 7 and then remove the eraser bracket assy 3 Removing the eraser bracket KCM assy 6 Remove the screw 1 and the connector 2 7 Release the lock of the claw then release the engagement with the bracket sensor T KCM See 3 3 35 8 Release the screw 7 and then remove the eraser bracket KCM assy 4 and unplug the cable 2 then remove the eraser bracket KCM assy Figure 3 3 34 Eraser Bracket Assy Eraser Bracket KCM Assy 2 40172710 Wire AMP8P AMP2PX4 RSPL 8 4 20 40308501 Eraser Bkt Assy RSPL 8 4 8 4 40324301 Eraser Bkt KCM Assy RSPL 8 4 9 Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com 62 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 35 Shaft Link 1 Remove the er
56. 998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com 59 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 32 Transfer Belt Open the Top cover Release the lock by drawing the cover knob then open the cover assy side L Turn the waste toner box box toner assy 1 to the left by pressing it down then remove it Draw out the belt cassette assy 2 by lifting it a little bit with its handle o P Cover assy side L Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 60 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 33 High Voltage Power Supply Unit Bracket HV BT Assy Remove the belt cassette assy See 3 3 32 Unscrew 2 screws 1 with the stacker cover opened then remove the plate HV 2 Unplug the cable 3 and 7 codes 4 Unscrew 2 screws 5 then remove the high voltage power supply unit 6 Remove the bracket HV Assy 7 d ue 9 Figure 3 3 33 High Voltage Power Supply Unit Bracket HV BT Assy Plate HV RSPL 82 415 6 40065601 Voltage Power Supply RSPL 8 2 413 7 40325001 Bracket HV BT Assy RSPL 8 2 14 Copyright 199
57. 998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 116 Service Guide OKIPAGE 8c Chapter Product Accessory Second Paper Feed Ouid 2 0 Mechanism Description 2 1 General Mechanism 2 2 Hopper Mechanism Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 117 Ok a Service Guide OKIPAGE 8c Chapter Product Accessory Second Paper Feed 2 1 General Mechanism The sheet at the very top of the stack in the paper cassette is fed into the printer one sheet at a time when the High Capacity Second Paper Feeder receives the signal from the printer 1 First the hopping motor rotates in the direction of arrow A The hopping gear is turned via the idle gear and the roller C on the same shaft is also turned At the same time the planet gear D moves in the direction of the arrow E and roller G turns the paper is fed for a predesignated distance until its leading edge reaches roller G 2 Next the hopping motor rotates in the direction of arrow B While the hopping gear also turns at the same time due to the one way bearing being engaged at the hopping gear the roller C does not turn The planet gear D moves in the direction of the arrow F drive
58. All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 133 OKI Service Guide OKIPAGE 8c Chapter Product Accessory Second Paper Feed 4 3 Troubleshooting Method When a problem occurs go through the troubleshooting according to the following procedure Problem cccura Problem displayed Troubleshooting vary aul LED messag according qe the LOD ireubxeshoeting Sirius Message Lil according the spe 4 31 Traubleshaating Flae 4 3 1 Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 134 Ok a Service Guide OKIPAGE 8c Chapter Product Accessory 1 Second Paper Feed 4 3 1 LCD Status Message List The listing of the statuses and problems displayed in the form of messages on the LCD is provided in Table 4 1 Table 4 1 Jam error Notifies of occurrence Check the paper in the High feeding FEED JAM of jam while the paper Capacity Second Paper is being feed from High Feeder carry out the recover Capacity Second Paper printing by opening and Feeder closing the cover and turn the error display off When the problem occurs frequently go through the Troubleshooting Jam error Notifies of occurrence Check the paper in the ejection EXIT TAM of j
59. Chapter 6 Troubleshooting Procedures Poor fusing Images are blurred or peeled off when touched Is the paper under specification being used Use tha paper under the specification Yag contacts of tha fusing unit assembly connected correctly Mo Connect the contacts correctly Yes Arethare any rollers of the fusing unit heat roger oil ro amp ier or cleaning ail roleri contaminated Yes Replace the fusing unit assembly or oil assembly Is the setting of MEDIA menu 1 correcitly LIGHT 60g m LIGHT MIDILIM 57 5G m MEDIUM 75gm MEDIUM HEAVY S0g m 2 HEAVY 105g m ULTRA HEAVY 120gm TRANSPARENCY OHP Set the MEDIA TYPE correctly Yes Is AC voltage between pin 1 and 3 of the CNI connector of the low voltage power supply being supplied Mo Replace the low voltage power supply Yes Is resistance range of the heat raller thermistor under the regulation See Figure 6 1 It s about between 90 ohms and 700 ohms at room temperature of Q C to 4320 Replace the fusing unit assembly Yes Is resistance range of the backup roller thermistor under the regulation See Figure 6 1 15 about between 90 ohms and 700 ohms at roam temperature of Q C to 43 Mo Replace the tusing unit assembly Yes ls the signal THERM on pin 6 of tha connector of the engine board PX4 PCB In ihe following range LIGHT and LIGHT MEDIUM 2 6Y7 3 5 MEDILIM 3 1V 3 BV MEDIUM 3 1
60. Color 99 m Printout colors different from original colors 7 Wiring Diagram 7 1 Resistance Check 100 7 2 Program Font ROM Location 101 8 Centronics Parallel Interface Centronics Parallel Interface 102 A Illustrated Parts List Diagram A1 Covers Top amp Sides 103 Diagram A2 Printer Unit 104 Diagram A3 Main Chassis Unit 1 105 Diagram A4 Main Chassis Unit 2 106 Diagram A5 Main Chassis Motor PCB 107 Diagram A6 Frame Upper Assy 108 Diagram A7 Guide Cassette R Assy 109 Diagram A8 Main Motor A Assy 110 Diagram A9 Main Motor B Assy 111 Product Accessory Second Paper Feed Preface 112 1 0 Outline 113 Table of Contents Page 1 1 Functions 114 1 2 External View and Component Names 115 2 0 Mechanism Description 116 2 1 General Mechanism 117 2 2 Hopper Mechanism 118 3 0 PARTS REPLACEMENT 119 3 1 Precautions Concerning Parts Replacement 120 3 2 Parts Layout 121 3 3 Parts Replacement Methods 122 A 3 3 1 Idle rollers 123 eds 3 3 2 AOLT PCB 124 er 3 3 3 Hopping motor 125 ere 3 3 4 Feed roller 126 3 3 5 Hopping roller 127 E 3 3 6 Side frame L assy 128 T 3 3 7 Side frame R assy 129 4 0 Troubleshooting 130 4 1 Precautions Prior to the Troubleshooting 131 4 2 Preparations Prior to the Troubleshooting 132 4 3 Troubleshooting Method 133 oes 4 3 1 LCD Status Message List 134 4 3 2 Troubleshooting Flow 135 5 0 CONNECTION DIAGRAM 136 1 Interconnection Diagram 137
61. Enables or disables the menu functions Menu1 Menu2 Tray Type Power Save and Paper Size of the operator panel j 1 Corrects the position of the whole print image so that it may be perpendicular to the movement of paper at intervals of 0 25mm 2 print image exceeding the specified printable area is clipped k Y adjust 1 Corrects the position of the whole print image so that it parallels the movement of paper at intervals of 0 25mm 2 print image exceeding the specified printable area is clipped Darkness Yellow Magenta Cyan and Black oets the printout density of each color m SETTING Used for fine adjustments when the operational environment of the use of special paper etc may produce a prominent blur and dispersion on the printed output Executes a Print Quality correction for continuous use of special environment and media When scattered printing or snow flake like printing is output it should be decremented When the printing becomes scratchy it should be incremented Press the ENTER key to write the setting to the EEPROM n Color Register Adjust Execute Sets values for correcting X axis diagonal and Y axis deviations of the LED heads yellow magenta and cyan relative to black The tandem type page printer is equipped with an array of image drum 1 0 units which cannot be free from generation of color deviations The color deviations are main scanning sub scanning and diagonal devi
62. M RESETTING _ _ RECOVER STOP j SETTINGEEPROM CNT nn entas CNT RST RESETTING CNT RST Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com 77 Ok a Service Guide OKIPAGE 8c Chapter 4 Adjustments 4 1 3 Engine maintenance mode To enter the engine maintenance mode pres and hold the ENTER and FORM FEED keys while powering on the printer ENG MNT is displayed on the operator panel Note The engine maintenance mode is hidden and not available to the user To exit this mode press the ONLINE switch The operation mode is entered The engine maintenance mode supports the following functions Head drive time setting YELLOW MAGENTA CYAN BLACK Drum count display YELLOW MAGENTA CYAN BLACK Total drum count display YELLOW MAGENTA CYAN BLACK Fuser count display Belt count display Oil roller count display Setting of standard tray paper feed length Setting of second tray paper feed length Setting of front feeder paper feed length Engine reset 1 Head drive time setting Yellow Magenta Cyan and Black Sets the time of driving each LED head 2 Drum count display Yellow Magenta Cyan and Black Displays the number of revolutions of each image drum counted by the engine on the LCD 3 Total drum cou
63. MENU switch is pressed The last category wraps around to the first category The system maintenance mode supports the following functions Page count display e Page count printing enable disable Rolling ASCII continuous printing e EEPROM reset HSP ERROR recovery e HSP ERROR count display HSP ERROR count reset 1 Page count display The total number of pages counted at the engine is displayed on the operator panel 2 Page count printing enable disable e This function selects whether to include enable or exclude disable the total number of printed pages counted at the engine at the time of menu printing 3 Rolling ASCII continuous printing e The rolling ASCII pattern is printed continuously for various engine tests e Press the ON LINE key to cancel this mode 4 EEPROM reset e All EEPROM areas including Menu level 2 to the factory default values e following items are excluded Head drive time setting ENGINE Maintenance Item Revision Including Destination setting 5 HSP ERROR recovery e Select HSP ERROR recovery function either recover or stop 6 HSP ERROR count e Display total HSP ERROR count 7 HSP ERROR count reset e Reset the ERROR counter System Maintenance mode menu system wem t Mun zm ENTER key process mom P nnnnnn leaps P ENABLE CONT PRT CONT PRT CONT PRT PRINTING CANCELLED Press the ONLINE button EEPROM RESET EEPRO
64. OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com 141 Service Guide OKIPAGE 8c Chapter Product Accessory Second Paper Feed 2nd Tray Assembly 42 TE ASSEMBLY Uu P apart GECTICINI TE ASSEMBLY CABINET amp io ty U 2 3 4 Inner guide assembly 3PA4122 1371G001 5 Cassette assembly 2nd tray 1 4122 13620004 3 5 5 9 Hoppingflame assembly 1PA4122 1366G001 1 3 6 10 metal ADF 7 4 522 3568 001 1 3 5 11 Gea z O 7 22427 0 1 1 3 5 12 Lever sensor p 7 4 122433 01 1 3 5 13 assembly 3PA4122 1393G001 1 3 5 14 Cable amp connector 3YS4111 3528P001 1 3 5 3 6 3 3 5 2nd cassette guide L assy 1PA4122 1365G001 Hopping roller assembly 4122 13670001 2nd cassette guide assy 1YX4122 1364G002 6 316 23 One wayclutchgear 1 4 41221382 001 1 6 12 24 TQSB2PCB 4 4046 16516002 1 3 6 Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com
65. OKIDATA Business Partner Exchange BP X for any updates to this material http opx okidata com 92 Ok a Service Guide OKIPAGE 8c Chapter 6 Troubleshooting Procedures 6 5 3 Image Troubleshooting When the printout images are not satisfactory follow the troubleshooting steps listed below Printout problem Reference flowchart No Light or blurred images Figure 6 2 A Dark background Figure 6 2 B Blank paper Figure 6 2 C Vertical black Figure 6 2 D Vertical white Figure 6 2 F Poor fusing Images are blurred or peeled off when touched Evenly spaced repeating marks Figure 6 2 E Missing characters or colors Poor synthesization Color Printout colors different from original colors d L n u A Light or blurred images B Dark background C Blank paper T _ i amp D Vertical lines E Evenly space repeating D Vertical lines marks Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 93 OKI Service Guide OKIPAGE 8c Chapter 6 Troubleshooting Procedures Blank paper Is each LED haad assembly connected to the junction board PCB correctiy Gonnect ihe LED head assembly io 15 board correctly
66. P SW TE6135 6137 16550 53C80 Functional Block Diagram of Main Control Board 1 2 3 4 5 6 7 CPU The CPU is a 64 bit RISC architecture processor provided y NKK It inputs a frequency of 50 MHz and runs at 100 MHz It transfers data to a from memory at 50 MHz Mask ROM The mask ROM block consists of four 16 Mbit 1M x 16 bits chips and its total size is 8M bytes The chips are mounted on the PCR PCB by means of IC sockets and store programs and character fonts DRAM The DRAM block consists of eight 16 Mbit 1M x 16bits chips and its total size is 16M bytes The chips are mounted on the PCR PCB and can be expanded up to 80M bytes by adding the 32M byte SIMMs to the SIMM slots on the PCR PCB EEPROM The EEPROM block consists of 1K bit chips mounted on a board by means of IC sockets and stores the following e Menu data e Counter values e Adjustment values Flash ROM The Flash ROM block consists of four 4M bit 256K x 16bits chips and its total size is 2M bytes The chips are mounted on the PCR PCB and are used for storing fonts macro and demo pages Memory control LSI This block mainly consists of memory control CPU control compression and decompression and video interface functions Interface control LSI This block mainly consists of PU interface control operator panel interface control EEPROM control parallel interface control and HSP control functions 8 Host interface The pri
67. ables 2 and 4 cables 3 Unscrew 4 screws 4 then remove the PD6 PCB 5 Unscrew 2 screw 6 then remove Guide Holder 7 by releasing the clamp of the claw gt v S X gw Unscrew 4 screws 8 then remove the Upper Frame Assy 9 Cable is pushed against sharp edge hole down to LED head Figure 3 3 5 Upper Frame Assy 40410701 Frame Upper Assembly RSPL 40187801 Guide Holder RSPL Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com 33 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 6 Plate Support Assemblies The plate support assemblies are provided right and left The method of those replacements is the same 1 Remove the heat unit assy See 3 3 40 Remove the cover assy rear See 3 3 1 Remove the cover assy stacker See 3 3 4 Remove the frame assy upper See 3 3 5 Detach the cable from the flat cable clip 1 by releasing the lock Pak wD Remove the 2 screws 2 then remove the plate support assy 3 Be careful not to lose the spring 4 which is removed with the plate support assy 3 Figure 3 3 6 Plate Support Assy RSPL 46 40197401 Torsion Spring A Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http
68. am while the paper printer Carry out the recovery is being ejected from printing by opening and the printer closing the cover and turn the error display off Paper size error e Notifies of incorrect size Check the paper in the High paper feeding from High Capacity Second Paper Capacity Second Paper Feeder Also check to see if Feeder there was a feeding of multiple sheets Carry out the recovery printing by opening and closing the cover and turn the error display off Notifies of no paper Load the paper in High state of the High Capacity Second Paper Capacity Second Paper Feeder Feeder Notifies of correct paper Load the requested size in size for the High the High Capacity Second Capacity Second Paper Paper Feeder Feeder 4 Letter Legal etc e JAM error Paper Inlet Jam Does paper jam al the when tha power banned on YER dg the paper locabed above the sensor plate dirien TES paper bs fie seer pate dine operaling normale Heplaca the exnsor plate YES Paplace fie power sippy sengor board oe inel s660 MO When the paper is Ted in does the paper inlet jam occur YES dg fie paper baing hed c above sangor plate YES sensor plate inlet operating nomnal B HPepitace the sensor plate inlet YES Clean the sensor on Tha power supplpsensor board or replace the prwer Sencar board or inlet serait MO
69. and remove the front panel assy 2 2 Remove two idle rollers 3 Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 124 Service Guide OKIPAGE 8c Chapter Product Accessory Second Paper Feed 3 3 2 AOLT PCB 1 Remove 16 screw 1 and remove the Cover Lower 2 Cover Upper 6 2 Remove three connectors 3 and three screws 4 3 Remove the AOLT PCB 5 Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 125 Service Guide OKIPAGE 8c Chapter Product Accessory Second Paper Feed 3 3 3 Hopping motor 1 Remove the Cover Upper and Cover Lower see 3 3 1 step 1 2 Remove the front panel assy see 3 3 1 step 2 3 Remove two connectors 2 and two screws 3 then remove the hopping motor assy 4 Three gears 5 and the connecting lever 6 as well as the wave washer 7 all come off at the same time so be careful not to lose them 4 Remove two screws 8 and remove the hopping motor 9 5 Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com 126
70. aser bracket assy See 3 3 34 Remove the gear one way 430 See 3 3 14 Remove the E ring 3 by sliding the sensor assy T KCM 1 and bracket sensor T KCM 2 together in the arrow A direction 4 Release the engagement between the lever Up Dn and boss A of the lever link R 5 by sliding the spring support R 4 lever link R 5 and the bearing 6 together in the arrow B direction Keep on sliding until the lever link R 5 reaches the end of D cut part of the shaft link 7 5 Draw out the entire shaft link 7 by pressing it in the arrow C direction and turning its left side under the contact BL L assy 6 Detach the sensor assy T KCM 1 bracket sensor T KCM 2 spring support R 4 lever link R 5 and the bearing 6 from the shaft link 7 7 Remove 2 E rings 8 then remove the spring support L 9 and lever link L 10 Notice for mounting e Engagement between the lever Up Dn and boss A of the lever link R 5 Mount the spring support L 9 and lever link L 10 in the predetermined positions then clamp the boss A of lever link R 5 with the lever Up Dn by adding rotating power on the spring support L 9 by rotating the shaft link 7 e Mounting of the spring support R 4 Clamp the spring support R 4 at the predetermined positions in the lever link 5 and the contact R Lever Up Down Figure 3 3 35 Shaft Link 5 40132301 Lever Link R
71. assis Unit 2 amd 5 aa Ex QO wv 553 arg im o 5 gt 2 2 OKI Part Number Diagram Number 40324501 Contact BL L Assy 40278101 Plate Earth LK 51608901 Bearing 40324401 Contact CL L Assy 40324601 Contact Bkt BL R assy 40135301 Photo Interrupter 40309001 Contact BKT CL R Assy 40308501 Eraser BKT Assy 40324301 Eraser BKT KCM Assy 40167901 Shaft Link 40132301 Lever Link R 40132401 Lever Link L 50705301 E Ring 40168401 Spring Support R 40188501 Spring Support L 40136201 Bracket Sensor Toner KCM 0 PP3522 3568P001 Bearing 40173301 AMP14P AMP3PX4 40449501 Sensor Assy T KCM 40172701 AMP8P AMP2PX4 Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com 107 Ok a Service Guide OKIPAGE 8c Chapter A Illustrated Parts List Diagram A5 Main Chassis Motor PCB Diagram OKI Part Univerisal Part Part Number Number Number Description 40310001 40392301 40309101 40309201 40208101 40664401 40175001 40143401 40143501 40164401 40124101 40634102 40437201 40233901 40604802 40376901 40197101 54122925 40377001 40171002 40456101 40173001 40171001 40447101 40173301 40171801 40172401 0 40172801 40447301 40177701 40447001 40172701 000000 000000 0 40450
72. ations These mechanically caused color deviations are corrected electronically User maintenance mode menu system ENTER key process RESETTING RESET ON LINE HEX DUMP RESETING Reser RESETTING RESET RESETING Rese _ RESETTING RESET RESETTING RESET Category MAGENTA DRMCNT RESET BLACK DRMCNT FUSER COUNT OIL ROLLER COUNT RESETTING RESET RESETTING RESET RESETTING OIL ROLLER COUNT RESETTING RESET CYAN DRMCNT RESET SETTING EEPROM OP MENU ENABLE DISABLE X ADJUST Y ADJUST SETTING EEPROM SETTING EEPROM SETTING EEPROM MAGENTA DARKNESS CYAN DARKNESS SETTING EEPROM SETTING EEPROM BLACK DARKNESS SETTING EEPROM COLOR REG ADJUST Refer to Section EXECUTE 4 2 2 color deviation correction 1 2 2 1 Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 76 Ok a Service Guide OKIPAGE 8c Chapter 4 Adjustments 4 1 2 System maintenance mode To enter the system maintenance mode press and hold the RECOVER key while powering on the printer Note The system maintenance mode is hidden and not available to the user To exit this mode press the ONLINE switch except during rolling ASCII continuous printing Then the RUN mode is set In the system maintenance mode the category changes each time the
73. ature sensor and a room humidity sensor An optimum transfer voltage is calculated using the obtained environmental conditions The unit then prints using the optimum transfer voltage Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 19 Ok a Service Guide OKIPAGE 8c Chapter 2 Operation 2 8 Form Jam Detection OKIPAGE 8c checks for a paper jam when the page printer is powered on and during printing When a paper jam is found the OKIPAGE 8c immediately stops the printing process To recover the printer open the cover find and remove the jammed paper then close the cover ___ Eror Form feed jam Three hopping operations are made but the Form Feed sensor Entrance does not turn on within a preset time after the Form Feed sensor 1 turns on Convey jam The ejection sensor does not turn on within a preset time period after the Write sensor detects the front end of paper Ejection jam The eject sensor detected the front edge of the paper but does not detect the rear edge of the paper within a preset time period Form size error The form size obtained by measuring the time period between the rear edge of the paper passes by the Form Feed sensor 2 after the front edge of the paper passed the Write sensor is longer by 45mm than the specified form length To
74. ce Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 30 Holder Gear Toner Assy 1 Remove the cover assy side R cover assy OP panel cover front R and the cover front L See 3 3 8 2 Unplug the cable 1 and unscrew the screw 2 then remove the holder gear toner assy 3 Figure 3 3 30 Holder Gear Toner Assy 3 140309801 Holder Gear Toner Assy RSPL 8 2 10 Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 58 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 31 Plate Latch Lever FD Spring Latch Lever FD 1 Remove the cover assy side R cover assy OP panel cover front R and the cover front L See 3 3 8 Open the cover CU See 3 3 11 Unplug the cable 1 Unscrew the screw 2 then remove the bracket SW side 3 Unscrew 4 screws 4 then remove the stay upper front 5 Pak wD Remove the plate latch lever FD 6 and spring latch lever FD 7 with the side frames spread Be careful not to spread the frames too much Figure 3 3 31 Plate Latch Lever FD Spring Latch Lever FD 40388501 SW RSPL 8 3 33 5 401711041 Stay Upper Front RSPL 8 3 32 6 140195101 Plate Latch Lever FD RSPL 8 3 34 7 140195001 Spring Latch Lever FD RSPL 8 3 35 Copyright 1
75. check Flash ROM check Um Uum Um Um a b C d ROM check a Checks ROM by comparing the sum of bits in the received data unit by the number of bits in the transferred data unit RAM check a Checks RAM by writing a preset data patter in RAM reading the contents of RAM and comparing the data read from RAM by the data written in RAM Write read test b Checks optional RAM if it is installed c Checks resident RAM by exclusively O Ring high and low addresses to prepare 16 bit data units writing a preset 16 bit data patter in RAM reading the contents of RAM and comparing the data read from RAM by the data written in RAM Checks optional RAM by writing and reading 32 bit fixed patterns 5555h and aaaah in optional RAM EEPROM check a Checks identification numbers stored in the fixed addresses of EEPROM b Checks the contents of the menu area by control firmware and the engine area by engine firmware Flash ROM check Checks Flash ROM by writing a present data pattern in Flash ROM reading the contents of Flash ROM and comparing the data read from Flash ROM by the data written in Flash ROM Write read test Option check unit Checks whether the optional units such as the second tray and PS SIMM have been installed before entering the operation mode Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to t
76. de Side Heat unit Spring Lock L Spring Lock Heat Lever Lock Heat unit L Lever Lock Heat unit R Limiter 2Way L Limiter 2Way Plate Guard L Plate Guard R Stay Lower Front Lever Regist Sensor PCB PXM Roller Registration Roller Assy Hopping Guide Paper Input Assy Bearing Hopping Gear Z20 Bearing Bushing ADF Gear Oneway 96 Gear Oneway Z48 48 GearOneway Z48 Stay Upper Front Bracket SW Plate Latch lever FD Spring Latch lever FD Stay Heat Conection cord wire Screw 4043 4718 001 Guide Assy Heat Unit Stay EP Guide Assy Heat Hopping Roller Boss Assy Guide Paper Input A Lever Input Sensor Lever 2nd Feed Sensor Shaft Hopping roller 1st Bracket Switch Holder Switch Spring Eject Heat Knock Pin CONN Cord Wire Bracket Switch Side InterLock SW Cable Assy Cover Sensor AMP6P AMP4P PCB PXL AMP7P AMP7P Cordwire JST6P AMP3PX2 Plate Base Assy Guide Cassette L Assy Guide Cassette R Assy Plate Bottom Conection cord wire Plate Shield Heat Heat Sink 801 Roller Assy Hopping Spacer Register Gear Cover Bottom Weld Plate Guide Rubber Foot Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 106 co lt xX O 5 Z 0 Chapter A Illustrated Parts List Diagram A4 Main Ch
77. drive time re reset is necessary e Display of illumination level of the LED head 405473 WIENEN The trailing three digits of this number indicates the illumination level of the LED head Parameter value Illumination level of Parameter value Illumination level Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 80 Ok a Service Guide OKIPAGE 8c Chapter 4 Adjustments 4 2 2 Color Registration Using the Operator Panel Color deviation correction After replacing a part of the page printer be sure to check whether colors are matched If not correct the deviations Method of correcting color deviations a Set the User Maintenance mode select the Color Deviation Correction mode COLOR REG ADJUST EXECUTE and print out a color chart PRINT PATTERN In this mode the page printer cannot receive any data from the host computer Watch the printed color and check color deviations 1 to 3 for yellow 4 to 6 for magenta and 7 to 9 for cyan c After a color chart is printed out the menu shows the ADJUST 1 mode for entering a correction value for the left 1 yellow chart d Enter correction values for 1 left yellow chart 2 middle yellow chart and 3 right yellow chart Similarly enter correction values for 4 to 6 for left middle and center magenta c
78. e troubleshooting If a problem cannot be repaired according to the LCD message problem list troubleshoot using the troubleshooting chart Flowchart Number 1 The printer does not work normally after being turned on 2 JAM Error Paper Input Jam 1st Tray Paper Input Jam Front Feeder Paper Feed Jam Paper Exit Jam 2 4 3 6 FanMotorBEmr 0 8 Cannot receive data from OKI HSP interface Note When replacing the main board PCR PCB and the engine board PX4 PCB remove EEPROM chips from the old boards and install them on the new boards The printer does not work normally altar turned on tha power of rhe printer off tha power of tha printer wait a few seconds than turn on power again Is on the LCD for about 1 second Alo Yes Yes Yas Ne Yas Is ihe AC cable connected correctly Mo Connect AC cable correctly Does a voltage of 5V being supplied the panel connector of the main beard PCA Pin 5 45V Pin 2 QV Yas 15 operator panel cable connected carractly Mo Connect the cable correctly Yes Replace the operator panel cable Recovered Replace the cover assembly operator panel Yes End Check the connection af the PLI connector Does a volage of 5V being supplied on Ihe PLI connector of the main board PCR POR Pin 6 15 26 35 5V Fin 1 3 5 11 20 21 40 0V Yes
79. eans of IC socket and stores adjustment values Pulse motor drivers These drivers MI D2005F drive eight pulse motors for moving up and down the image drum EP and transferring medium Video memory This SRAM received print data through video interface and stores it Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 10 Ok a Service Guide OKIPAGE 8c Chapter 2 Operation 2 0 Power Board The power board consists of an AC filter circuit a low voltage power supply circuit a high voltage power supply circuit and heater drive circuit and photo sensors 1 Low voltage power supply circuit This circuit generates the following voltages Output voltage o o o 483 3V jCUUnit CPU LED HEAD Logic circuit supply voltage 32 V Motor and fan drive voltage and source voltage for high voltage supply discharge lamp HSP OP Amp high voltage power supply 2 High voltage power supply circuit This circuit generates the following voltages necessary for electro photographic processing from 32 V in accordance with the control sequence from the control board When cover open state is detected 32 V supply is automatically interrupted to stop the supply of all high voltage outputs YMCK Yellow Magenta Cyan Black Voltage Use Remarks 1 35 KV 50V Vol
80. ector of the engine board PX4 PCB Ma Check the connection of tha signal cable or reptace the sensor board PAL PCB Replace the engine board the Faeeup stacker open or closed completely Open or close the facaup stacker completely the Heat motor rotating properly Is the resistance of heater motor about 7 1 ohms No Replace the heater motor 5 432V being supplied on the FU ef the engine board the low voltage power supply Check the connection of the cables or replace tha engine board Is the Guide paper ejecting Assy work correctly Replace the guide paper ejecting Assy Replace the engine board Paper Size Error Is the paper which being used under the specification Mo Use paper which is under the specification Yes 15 the paper jam med at the Lever regist sensor or the Write sensor Yes Remove the paper Yas Doss the sensor fevers Lever regist sensor work correcthy Mo Replace the defective sensor lever Lever regist sensor Yas Doss the sensor Lever regist sensor work correctly Operate each sensor lever and check its signal on the related pin af the FSENS connector of the junction board PXF PCRB Pin 4 for Lever regist sensor Mo Check the connection of the cables or replace ihe sensor board PXM PCBJ Yeas Doss the Write sensor lever work correcthy No Replace the Write sensor lever Yes Does the Write sensor work correctly Operate the sensor lever and check ds signal on tha rela
81. ed BELT NOT INSTALLED WASTE TONER BOX NOT INSTALLED Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined OFF OFF OFF OFF OFF Displayed when 100 pages are printed after Waste Toner NR FULL message is detected prompting the user to replace the Waste Toner Bottle Indicates that the front feeder has caused a home position error Indicates that the printer cover is open Indicates that the transfer belt has not been installed Indicates that the Waste Toner Bottle has not been installed This error is reset when the Waste Toner Bottle is replaced Printing is suppressed until it is replaced The front feeder becomes unavailable when the RECOVER switch is pressed The other tray is available This message is cleared when the front feeder assembly is replaced This error is reset when the cover is closed If this error occurs frequently go to Section 6 5 2 This error corrected when the Transfer Belt is installed Printing is suppressed until the Transfer Belt is installed This error is corrected when the Waste Toner Bottle is installed Printing is suppressed until the Waste Toner Bottle is installed WASTE TNR Undefined Undefined Undefined Undefined Undefined
82. ed paper size Letter Executive Legal 14 Legal 13 A4 Ab A6 or B5 size Tray type Tray 1 Tray 2 or Front CANNOT USE Undefined Undefined Undefined Undefined OFF Blink Displayed The second A6 PAPER ON when the tray TRAY 2 second tray optional optional cannot use contains A6 size A6 size paper The paper A6 size paper is available to the first tray or to the front feeder TRAY 1 INSTALL Undefined Undefined Undefined Undefined OFF Blink Indicates This that the first message is tray is pulled cleared out when the when the second tray first tray is optional is mounted used corrected Category Paper Request Table 6 1 LCD Status LED LED LED LED READY ATTENTI Trouble Remedy Message K C M Y ON or Status mmmmmmm Undefined Undefined Undefined Undefined OFF Requests Normal MANUAL PAPER the user to operation REQUEST load the specified This paper inthe message is manual cleared feeder when the specified mm m paper is paper size loaded into Letter the manual Executive feeder Legal 14 Legal 13 A4 5 6 or B5 size Undefined Undefined Undefined Undefined ON OFF Requests Normal the user to operation load the specified This paper inthe message is manual cleared feeder when the specified mm m paper is paper size loaded into Letter manual Executive feeder Legal 14 Legal 13 A4 Ab A6 or B5 size Category Paper Size Error Table 6 1
83. ee the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 14 Service Guide OKIPAGE 8c Chapter 2 Operation 2 5 Sensors 2 5 1 Paper related sensors 2 5 2 Other sensors Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 15 Ok a Service Guide OKIPAGE 8c Chapter 2 Operation 2 5 1 Paper Related Sensors Qu Fjection raller a Y drum Write sensor FF hopping roller K drum drum M drum Heat raller Pickup raller Finch roller 2 Exit sensor Y 4 A Farm width sensor 4 i f roller 1 i Resist roller 1 Backup roller esist roller i a y Resist roller 2 J FF sensor 1 Belt cleaning blade Conveying bell FF sensor 2 M First hopping roller A e Auxiliary rollers Second hopping roller FF sensor 1 2 Detects the front edge of an incoming paper ON Front edge detected Entrance sensor 1 2 determines timing to change from OFF Front edge not detected hopping to conveying Write sensor Detects the front edge of the conveyed ON Form present paper sheet and determines the length of the OFF Form absent paper sheet from elapsed time before the front edge of the paper reaches the sensor Ejection sensor Detects the front and rear edges
84. er 3 3 9 PCB Assy PCR 3 3 10 Motor Fan CU 3 3 11 PXF PCB PX4 PCB 3 3 12 Gear Heat Assy 3 3 13 Main Motor A B Assy 3 3 14 Gear Z30 3 3 15 Motor Assy BT 3 3 16 Power Supply Unit Holder Inlet Sheet Insulation 3 3 17 Sensor Assy Box Toner 3 3 18 Square shaped Connector 3 3 19 Hopping Motor 3 3 20 Gear One Way 3 3 21 Feeder Unit Front 3 3 22 Manual Feed Hopper Assy 3 3 23 Guide Paper Input Assy 3 3 24 Lever Input Sensor 3 3 25 Roller Registration Roller Assy Hopping 3 3 26 Roller Hopping 3 3 27 PCB PXM PCB Lever Regist Sensor 3 3 28 Paper End Lever 3 3 29 PCO PCB Operator Panel 3 3 30 Holder Gear Toner Assy 3 3 31 Plate Latch Lever FD Spring Latch Lever FD 3 3 32 Belt Cassette Assy 3 3 33 High Voltage Power Supply Unit Bracket HV 3 3 34 Erase Bracket Assy Eraser Bracket 3 3 35 Shaft Link 3 3 36 Contact BL R Assy Contact CL R Assy 3 3 37 Contact BL L Assy Contact CL L Assy 3 3 38 Contact SB Assy 3 3 39 PXC PCB 3 9 40 Heat Unit Assy 3 3 41 Oil Roller Assy 3 3 42 Lever Lock Heat L R Guide Side Heat Spring Lock 3 3 43 PXL PCB 3 3 44 Heat Unit Guide Assy 3 3 45 Holder LED Assy LED Head Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 28 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 1 Cov
85. er Assy Rear Remove the 2 screws 1 then lift the cover assy rear 2 a little bit then remove the cover assy rear by releasing the two claws Figure 3 3 1 Cover Assy Rear 40315201 Cover Assy Rear RSPL Includes 40098401 Cover Rear 40187501 Stacker Face up 40187601 Support Stacker Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 29 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 2 Motor Fan 80 25 Remove the cover assy rear See 3 3 1 Remove the two screws 1 Detach the fan motor 2 from the guide with its right side lifted then draw the fan motor qe Detach the cable 3 then remove the fan motor 3 Figure 3 3 2 Fan Motor 80 25 40255201 Motor 80 25 RSPL Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 30 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 3 Paper Eject Assy The paper eject assy includes the frame eject assy and the guide paper eject assy Remove the cover assy rear See 3 3 1 Open the top cover Unscrew 4 screws 1 then remove the frame eject assy 2 Dope 9 Remove the guide paper eject assy 3 by releasing the
86. er clockwise and the up down gear one way gear is released The weight of the image drum unit is applied to the up down lever via the up down actuator of the image drum unit The free up down gear turns right in the direction b in Figure 2 6 a and the image drum unit goes down until the up down actuator of the image drum unit is stopped by the up down lever See Figure 2 6 c During this the image is transferred onto the running paper VD unit up down actuator PAE PERS YN OG 5 a Up down lever Upward Movement of Image Drum Up down lever Downward Movement of Image Drum 3 Lubrication and cleaning of fixing ejecting and heat rollers Face down stacker 4 4 Ejection roller roller Oil cleaning roller 1 1 Backup roller Fixer Heat motor The fixing roller the ejecting roller and the heat roller are lubricated and cleaned by a single pulse motor When the heat roller pulse motor turns right in the direction of a the heat roller and the backup roller turn left in the direction of a to fix a toner image onto the paper At the same time three ejection rollers turn right in the direction of a to eject the paper The oil roller and the oil cleaning roller turn left in the direction of a to supply oil to the surface of the heat roller and clean the surface Copyright 1998 Okidata Division of America Inc All rights reserved S
87. er feeding Does the paper reach the Write sensor Yes Goto Regist motor rotates No isthe resistance of the regist motor about 7 1 ohms Mo Replace the ragist motor Yes Check the gear engagement or replace the engine board Haplace the resist roller 1 or 2 la the paper jam occur when paper loading la the Balt motor rotates property Yos Yos No isthe of belt molor about 7 1 ohms Replace the belt motor Yes Check the gear engagement or reptace the engine board Check the gear engagement or replace the belt cassette Assy Does the leading edge of a paper nass by the Exit sensor Is ihe sensor lever in a normal operation No Rapaces the defective sensor lever Exit sensor Is the Exit sereor in a normal operation Operate tha sensor lever and check its signal pins land 6 ortis RSENS connectar of tha angina board PX 4 PCB Mo Check the connection of the signal cable or replace the sensor board PXL PCB Replace the engine board PX4 PCRBI Replace the engine board PX4 PCBJ 2 4 Paper Exit Jam Is the paper jam immediately occur after the page printer is powered an Yes Yes No Yas Yas Is tha jammed paper at the Exit sensor Yes Remove the paper Does the sensor lever work correctly Ma Heptace the defective sensor lever Does the Exif sensor work correctly Operate the sensor lever and check its signal on pins 1 and 6 of the RSENS conn
88. erica Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 89 OKI Service Guide OKIPAGE 8c Chapter 6 Troubleshooting Procedures 6 5 Troubleshooting Flow If problems should develop in this printer troubleshoot using the following flowchart 6 5 1 LCD status message problem list 6 5 2 LCD message troubleshooting 6 5 3 Image troubleshooting Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 90 Ok a Service Guide OKIPAGE 8c Chapter 6 Troubleshooting Procedures 6 5 1 LCD status message problem list Table 6 1 lists the status and problems that may be indicated by messages on the LCD xxx Emulation in operation AUT PCL PS Trays Tray1 Tray2 Front mmmmmm Paper Size Letter A4 etc Category Daily Status Table 6 1 LCD Status LED LED LED LED READY Trouble Remedy Message K or Status Undefined Undefined Undefined Undefined OFF Displayed Normal when the operation page printer When is power on powered on the page printer turns on LEDs for about one second to check whether the LEDs and the LCD are normal INITIALIZING Undefined Undefined Undefined Undefined Displayed Normal while the operation controller
89. f OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 102 Om a Service Guide OKIPAGE 8c Chapter 8 Centronics Parallel Interface Centronics Parallel Interface 1 Connector e Printer side 36 pin receptacle single port Type 57RE 40360 830B D29A made by Daiichi Denshi or equivalent e Cable side 36 pin plug Type 57 30360 made by Daiichi Denshi or equivalent Plug 552274 1 AMP 552073 1 AMP or equivalent 2 Cable e Cable length 6 ft 1 8 m max A Shielded cable composed of twisted pair wires is recommended for noise prevention Note Cable is not supplied with the printer and is not available from Oki 3 Table of Parallel I F Signals Pinta Signal name Signal direction DATA STROBE iB Parallel dala sampling strabe DATA DATA 3 BIT 4 PR Parallel Feni ang cecal dala DATA BIT 5 DATA 8 BIT 7 DATA BIT TCRNGWLEDSE ee of data input or end of print pracessmg or alarm PAPER END Dalag state ON LINE AUTOFEED PE to ohanga mode iat used amor Chasse ground ED mA mar Signal ground misera End of pagar ec dining alarm Signal High level 23 3 Riequast to charge mode 4 Signal Level LOW 0Vto 0 8 V e HIGH 2 4 V to 5 0 V 5 Specifications 8K 20K 50K 100K 1M Bytes
90. from the image drum to the developing roller 5 Transferring This process fits paper to the surface of the image drum and applies positive charge opposite to the charge of the toner to the back side of the paper from the transfer roller The toner image is transferred to the paper 6 Cleaning Cleaning blade scrapes off the remaining toner of any image drum which has been used to transfer the image drum the drum to the paper 7 Fixing This process fixes the toner image on the paper by pressing the fusing the image Paper pickup Pickup raler Paper medium Corweying bell Canveying bell gt gt Driven roller DC voltage 0V to 2KV is applied to the driven roller A to create a positive charge on the lower surface of the paper The kept in charged paper is electrostatically attracted to the pickup roller The paper is in close contact with the conveying Belt and moves steadily 3 Charging This process applies a DC voltage to the charging roller in contact with the surface of the image drum Charging roler 4 Exposure The light beams from the LED head are applied to the surface of the image drum which is charged negatively The negative charge on the illuminated surface f the image drum is reduced according to the magnitude of the light beams and a latent image is formed on the surface of the image drum according to the resulting surface potentials LED haad Charging ro
91. g Periodically clean the inside and outside of the page printer with a soft cloth and small vacuum cleaner The vacuum cleaner must have a toner safe filter Caution Do not touch the terminals of the image drums the LED lens array or the LED head connector block Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 84 OKI Service Guide OKIPAGE 8c Chapter 5 Maintenance 5 4 Cleaning the Pickup Roller When horizontal lines appear on output clean the Pick up Roller Note Clean it up with a soft cloth so that the surface is not scratched Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 85 Service Guide OKIPAGE 8c Chapter 6 Troubleshooting Procedures 6 0 Troubleshooting Procedures 6 1 Troubleshooting Tips 6 2 Points to Check before Correcting Image Problems 6 3 Tips for Correcting Image Problems 6 4 Preparation for Troubleshooting 6 5 Troubleshooting Charts Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 86 Service Guide OKIPAGE 8c Chapter 6 Troubleshooting Procedures
92. g roller shaft assy or paper cassetta MO hopping reler ehalt rotating YES Set ihe paper propery MO ba the stepping motor brieg YES Aenlace the one way clutch gear en the happing shalt connector cable being connected property Connect the connector cable propery YES Check the cof resistance approx 43413 of the sheppeng motor tk Paplace the stepping mosor YES Replace the AOLT PCB Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 136 Service Guide OKIPAGE 8c Chapter Product Accessory Second Paper Feed Ouid 5 0 CONNECTION DIAGRAM 5 1 Interconnection Diagram 5 2 PCB Layout Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 137 Service Guide OKIPAGE 8c Chapter Product Accessory Second Paper Feed 5 1 Interconnection Diagram Hopping motor AD OP MIA 1 2 OP MIB OP M2A T 4 OP M2B i AOLT PCB sl adiu EE din uL 2 PAPERIN N 1 To Printer To Casse
93. ges Transfer Belt Cassette Assy 50 000 pages 12 Temperatures and relative humidities Temperature Temperature conditions Fahrenheit Celsius Remarks 0 Operating 50 to 89 6 10 to 32 17 Celsius to 27 Celsius for assurance of full color printout quality Non operating 32 to 109 4 0 to 43 Power off Storage 1 year max 14 to 109 4 10 to 43 with drum and toner Delivery 1 month max 20 to 122 29 to 50 without drum and toner and Belt Cassette Assy Delivery 1 month max 20 to 122 29 to 50 with drum and toner Humidity Humidity condition Operating 20 to 80 5096 to 70 for assurance of full color printout quality Non operating 10 to 90 Power off 100090 100090 40 17 13 Printer life 3 000 000 A4 pages or 5 years Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 7 Ok a Service Guide OKIPAGE 8c Chapter 2 Operation 2 Operation OKIPAGE 8c is a tandem color electrophotographic page printer using 4992 Pixel LED technologies OPC dry single component non magnetic developing roller transfer heat compression fixing fusing The printing method used is a Black Writing method which applies light beams to printout areas Here is the Functional Block Diagram of OKIPAGE 8c xaua m FA t3
94. ght 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 104 Ok a Service Guide OKIPAGE 8c Chapter A Illustrated Parts List Diagram 2 Printer Unit Diagram OKI Part Univerisal Part Part Number Number Number Description amp gt 40255201 40303501 40303401 40410701 40019001 40018901 40311201 40193501 40193601 40303301 40309801 40490801 40645301 40065601 40325001 40168001 40193201 40607001 40744501 40795501 40744401 40490904 40490901 40370603 40370602 40370604 40370601 40370201 40370302 40370301 40370303 40191201 54122930 55700401 40449001 40294201 40641801 40645401 Motor Fan 80 25 Frame Eject Assy Guide Paper Eject Assy Frame Upper Assy Power Unit ACDC Switching 230v Power Unit ACDC Switching 120v FDR Unit Front Plate FFLink Bracket FF Link Guide Paper Input Assy Holder Gear Toner Assy Belt Unit Oil Roller Unit High Voltage Power Supply Unit Bracket HV BT Assy Plate HV Holder Innret Separator Frame assy Separation Spring Spring Damper assy Paper Cassette Assy Fuser Unit 230V Fuser Unit Magenta Toner Cartridge Kit Type C1 Yellow Toner Cartridge Kit Type C1 Cyan Toner Cartridge Kit Type C1 Black Toner Cartridge Kit Type C1 Black Image Drum Kit Type C1 Magenta Image Drum Kit
95. h as microprocessors ROM and RAM and circuit boards follow standard electrostatic procedures 8 Do not place printed circuit boards directly on the equipment or floor No Service Tools 17 1 0 Remarks _ _ No 2 200 Philips 3 5 mm screws 2 1 mL E NENNEN cleaner LED Head cleaner Cleans LED P N 51802901 head Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 26 Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 2 Parts Layout Figure 3 1 Covers Figure 3 2 Print Assemblies Figure 3 3 Base Assemblies Figure 3 4 Contact Assemblies Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 27 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 How to Change Parts This section explains how to change parts and assemblies appearing in the disassembly diagram below 3 3 1 Cover Assy Rear 3 3 2 Motor Fan 80 25 3 3 3 Paper Eject Assy 3 3 4 Cover Assy Stacker Guide Eject FD Assy 3 3 5 Frame Assy Upper 3 3 6 Plate Support Assy 3 3 7 Limiter 2Way L R Plate Guide L R 3 3 8 Cov
96. h the FF sensor 2 Yes Go to f Replace the front feeder assembly Does the front feeder motor rotate propery Is 321 being supplied the of the engine board Me Replace the low voltage power supply Chack the connection of cables ar raplace the engine board Check the connection of cables of raplace the engine board 29 Paper feed jam Is the paper jam immediately occur after the page printer is powered on Yas Yas Yas Yes yos Yes Yes Is thera jam med paper at tha Write sensor Yes Remove the paper jam Does the laver of the Write sensor work right Heptace the lever of Write sensor Does the Write sensor work right Operate the levar ofthe Write sensor and check its signal ihe related pin of the FSENS connector of the junction board PXF PCB Pin 2 for Write sansor Mao Check the connection of tha cable or rapace Ine sensor board PAM ls the junction board PXF operation properly Operate the lever of the Write sensor and check its signal on the related pin of tha PXFIF connector of the Junction board PXF PCB Pin AS for Write sensor Hepiace the junction board PXF PCB Check the connection of tha cables between ihe furcton board PAF and the engine board PX4 is the connectian property Connect the cables property Replace the engine board Is the paper jam immediately occur after pap
97. haped Connector 1 Remove the power supply unit See 3 3 16 Do not remove the power switch and AC socket from the holder inlet Unplug the cable 1 Remove cable 2 screw 5 and bracket 6 in order and then take off SW from bracket 6 to pull off square shaped connector 4 Figure 3 3 18 Square shaped Connector m PB4043 4718 8 3 38 001 6 140446501 7 5 Cable Assy RSPL 8 3 53 4 40563100 Connection Cord Wire RSPL 8 3 437 Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 46 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 19 Motor Pulse ID 1 Remove the cover assy side R cover assy OP panel and the cover front R See 3 3 8 2 Unscrew 2 screws 1 and unplug the cable 2 then remove the bracket hopping motor 3 Be careful not to lose the gears 5 6 and 7 which slip off at this time 3 Unscrew 2 screws 8 then remove the hopping motor 3 Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 47 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 20 One way Gears 1 Remove the bracket hopping motor See 3 3
98. harts and for 7 to 9 for left middle and center cyan charts e After entering all correction values print out a new color chart oy PRINT EXECUTE and check color deviation f Repeat the above steps until all colors match g Press the ONLINE switch to exit the color correction mode by EXIT Initialize the page printer and enter the operation mode The menus for correction of color deviations are as follows COLOR REG ADJUST EXECUTE Print a sheet of displaced eolor check pattern PRINT PATTERN ice Hide x ADJUST 1 ADJUST 1 ADJUST 1 7 V Print a sheet of displaced color check pattern EXIT PRINT PATTERN MENU Press ENTER Key to determine Prass ENTER Key Press MENU Key Long press MENU Key Press lt Key Press gt Key To Operation Mode Color Check pattern Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 81 OKI Service Guide OKIPAGE 8c Chapter 5 Maintenance Preventive Maintenance 5 1 Periodically Replaced Parts 5 2 Cleaning 5 3 Cleaning the LED Lens Array 5 4 Cleaning the Pickup Roller Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com 82
99. he holder gear toner assy See 3 3 30 Removal of the roller registration 5 Remove the gear 1 and 2 bushes 2 and 2 bearings 3 then 2 roller registrations 4 Removal of the roller assy hopping 6 Remove the bush 5 and the bearing 6 7 Remove E rings 9 of the sub roller hopping at both sides of hopping roller and then release the lock of the roller hopping 7 with the shaft 8 by spreading the claw then remove the roller hopping from the left side by the sliding shaft 8 in the arrow direction Be careful not to lose the knock pin for fastening the roller hopping 7 which slisp off together Figure 3 3 25 Roller Registration Roller Assy Hopping 40310601 Roller Assy Hopping 83 593 includes a 7 40449701 Hopping Roller Boss Assy RSPL 8 3 42 8 40189601 Shaft Hopping Roller 1st RSPL 8 3 46 50608118 NK3 18 SUS RSPL 8 3 50 10 40743701 Assy Hopping Sub RSPL 8 3 66 4 40130801 Registration RSPL 8 3 22 Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 53 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 26 Hopping Roller Assy 1 Remove the roller assy hopping See 3 3 25 and remove the 2 sub roller hopping guide 3 Be ca
100. he problem recowerdT Yes End Ma there any gear broken of the unit image drum unit gear assermeoly front Taeder aeaerbly belt unit assembly or belt motor assembly ete Yes Replace the broken gear assembly ia each LED haad unit connected to the junction board PD amp a correctly Mo Connect fhe boards correctly Yes Check the connection of the cables or replace the LED head assembly is the problem recovered Yes End Check the connection af the cables or replace the junction board PDA PCB te the problem recovered Yes End engine board connected to the junction board PCB correctly Connect the boards correctly Yes Check the connection af the cables or replace EEPROM of the engine board 16 the prablam recovered Yes End Replace tha engine board Hecoverad Yes End 1a each terminal of each mage drum unit connected te the contact assembly correctly See Figure 6 3 Mo Make the terrminals be in contact with the contact assembly correctly Yes Replace the the image drum urit Notes 1 When replacing the engine board PX4 PCB demount the EEPROM chip from the old engine board and remount it on the new one 2 After replacing the image drum unit be sure to reset its counter in the User Maintenance mode 3 After replacing the LED head assembly be sure to adjust its drive time and correct its color deviation Copyright 1998 Okidata
101. his material http opx okidata com 24 OKI Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 0 Parts Replacement 3 1 Precautions for Parts Replacement 3 2 Parts Layout 3 3 How to Change Parts Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 25 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 1 Precautions for Parts Replacement 1 Before starting parts replacement remove the AC cable and interface cable a Removing the AC cable i Turn off o the power switch of the printer ii Disconnect the AC inlet plug of the AC cable from the AC receptacle iii Disconnect the AC cable and interface cable from the printer b Reconnecting the AC cable i Connect the AC cable and interface cable to the printer ii Connect the AC inlet plug to the AC receptacle iii Turn on 1 the power switch of the printer gt 2 Disconnect 2 Do not disassemble the printer if operating normally 3 Do not remove unnecessary parts try to keep disassembly to a minimum 4 Use specified service tools 5 When disassembling follow the determined sequence Otherwise parts may be damaged 6 Since screws collars and other small parts are likely to be lost they should temporarily be attached to the original positions 7 When handling ICs suc
102. ia the connector remove them at the same time 1 Remove the PCB assy PCM See 3 3 9 2 Unscrew 5 screws 1 then remove the cover CU2 3 Unplug all the cables 5 connected to the PXF PCB 3 and PX4 PCB 4 4 Unscrew 5 screws 6 then remove the PXF PCB3 and PX4 PCB4 at the same time Figure 3 3 11 PXF PCB PXS PCB Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 39 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 12 Gear Heat Assy Q9 WE X Remove the cover assy side R cover assy OP panel cover front R and the cover rear L See 3 3 8 Remove the cover CU then unplug all the cables connected to the PX4 PCB and unscrew 3 screws See 3 3 11 Unplug all the cables connected to the PXF PCB then remove the PX4 PCB See 3 3 11 Be careful not to damage the connector when unplugging cables connected to the PXF PCB Remove the heat unit assy See 3 3 40 Remove the guide paper eject assy See 3 3 3 Remove the motor fan 80 25 See 3 3 2 Remove the 5 screws 1 and detach the cable 2 then remove the guide heat assy 3 Remove the 2 screws 4 then remove the motor ID 5 e Figure 3 3 12 Gear Heat Assy 40310001 Gear Heat Assy RSPL 8 5 1 ndudes eee 140124101 Motor Pulse ID RSPL 8 5 11 40448901
103. in a hexadecimal format 2 When one or more page of data come from the host printing automatically starts To print out data of less than one page press the ONLINE key to set the offline state and press the EJECT key Printing starts 3 To exit this mode shut off power to the page printer This is the only way to exit this mode Drum counter reset for yellow magenta cyan and black 1 Used to reset the drum life after the image drum is replaced 2 After drum counter resetting is made the page printer does not enter the operation mode automatically Fuser count reset Resets the fuser life counter the fuser unit is replaced Belt count reset Resets the belt life counter the belt unit is replaced Oil roller count reset Resets the oil roller life counter after the oil roller unit is replaced Resource save area Sets the resource saving area This menu item appears when the option PS SIMM and RAM increases The selectable size will also increase When adding RAM over 24Mbytes the selection can be made up to 22 5Mbytes The size upon auto will also increase if the size of the add on RAM increases Receive buffer Sets the receive buffer The data transmission time from the upper command will decrease when set to a high value but memory overflow is more likely to occur Memory will be restructured with this change and the contents of all download fonts PCL macro and PostScript will be lost i Operator panel menu disable
104. is detected 2 times consecutively Toner Low is canceled e When there is no change with the toner sensor for 2 cycles 1 965 sec x 2 or more the Toner Sensor Alarm is activated e The toner sensor is not monitored while the drum motor is in halt Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com 22 Ok a Service Guide OKIPAGE 8c Chapter 2 Operation 2 11 Page Size Detection The four tab pieces are driven according to the setting position of the paper guide through the cam interlocked with the paper guide of the paper cassette When the paper cassette is inserted into the printer the position of the tab pieces is detected by a microswitch recognizing the paper size STATE OF MICROSWITCHES 0111111 0 1 0 11 2 L0 0 11 11 40 1210 11 11 3 Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com 23 Ok a Service Guide OKIPAGE 8c Chapter 2 Operation 2 12 Power on Processing 2 12 1 Self diagnostic test 1 2 3 4 5 6 Initial test The following check are automatically performed when the printer is power on ROM check RAM check EEPROM
105. ller we LED head Supply uu s 5 Developing This process applies toner to the latent image on the surface of the drum to create toner image Developing is carried out on the surface of the image drum at where the image contacts with the developing roller 1 The sponge roller transfers toner to the developing roller The toner is charged negatively Developing toner blade Charging roller sponge roller Developing raller OPC drum 2 The toner blade scrapes away excess toner from the developing roller leaving a thin film of toner on the surface of the developing roller 3 The toner is attracted to the latent image on the surface of the image drum where the image drum contacts the developing roller The latent image on the surface of the image drum is made visible with the toner 6 Transferring The transfer roller made of conductive sponge presses the paper against the surface of the image drum The paper will make close contact with the surface of the image drum This process fits the paper to the surface of the image drum using the transfer roller and applies a positive charge opposite to the charge of the toner from under the paper When a positive high voltage is applied to the transfer roller from the power supply the positive charge induced on the transfer roller jumps to the upper surface of the paper where the transfer roller touches the paper and attracts the negatively charged toner from
106. lock of one claw Figure 3 3 3 Paper Eject Assy 40303501 Frame Eject Assy RSPL 40303401 Guide Paper Eject Assy RSPL Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 31 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 4 Cover Assy Stacker Guide Eject FD Assy Remove the cover assy rear See 3 3 1 Release the cable from the cable clamp 1 by opening the clamp Unscrew 8 screws 2 then remove the cover assy stacker 3 Unscrew 4 screws 4 then remove the guide eject FD assy 5 x6 Figure 3 3 4 Cover Assy Stacker Guide Eject FD Assy 40314801 Cover Assy Stacker RSPL Includes 40303601 Guide Eject FD Assy RSPL 40449901 Cover Sub Assy Stacker Item 2 50318701 PP4083 5670P001 Screw RSPL Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 32 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 5 Upper Frame Assy Hemove the cover assy rear See 3 3 1 Remove the cover assy stacker See 3 3 4 Remove the holder LED assy See 3 3 45 Detach the cable from the cable clamp 1 by releasing its lock Remove connections of 4 connector c
107. ltage 7 Power consumption 8 Frequency 9 Noises 10 Expendables and service life 11 Periodically replaced parts Width 18 8 Approx 91 Ibs without box Ordinary paper Hammermill xx and Transparency Only CG3710 Recommended paper for color printing Note the printout color tones are dependent upon the whiteness of the print paper Letter Legal 13 or 14 Executive A4 A5 B5 and B6 1st tray and front feeder 1st tray 20 lbs to 28 lbs 2nd tray 20 lbs to 28 Ibs Front feeder 20 165 to 44 Ibs 8 pages per minute 5 pages per minute Transparency 34 Ib 44 Ib 1239 166g m 600 dots per inch x 600 dots per inch 120VAC 5 5 15 230VAC to 240VAC 10 14 Peak Approx 980W Typical operation Approx 230W Idle Approx 7OW Power save mode Approx 32W 50Hz or 60Hz 2 2 Operating 54 decibels without 2nd tray 55 decibels with 2nd tray Standby 45 decibels Power saving 43 decibels Toner Cartridge Approx 1800 pages 596 density each of Y M C and K Image Drum Up to 12 000 pages 5 density continuous each of Y M C and K Waste Toner Box Up to 25 000 sheets under typical printout conditions Single images of 5 density equivalent to printout using 14 toner cartridges Oil Roller Unit Up to 10 000 sheets Life defined in the number of actual printed paper sheets Note Y Yellow M Magenta C Cyan K Black Fuser Heat Unit Assy 60 000 pa
108. ly procedures in the reverse order 3 1 Precautions Concerning Parts Replacement 3 2 Parts Layout Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 120 Ok a Service Guide OKIPAGE 8c Chapter Product Accessory Second Paper Feed 3 1 Precautions Concerning Parts Replacement 1 Parts replacements must be carried out by first turning the printer power switch off and removing the printer from the High Capacity Second Paper Feeder 2 Do not disassemble the High Capacity Paper Feeder if it is operating normally 3 Establish the extent of disassembly suitable for the purpose of the procedure and do not disassemble any more than necessary 4 Only specified service tools may be used 5 Disassembly must be carried out according to the prescribed procedures Parts may be damaged if such procedures are not followed 6 Small parts such as screws and collars can easily be lost Therefore these parts should be temporarily fixed in the original location 7 When handling printed circuit boards do not use any glove which may generate static electricity 8 Do not place the printed circuit boards directly on the equipment or floor Service Tools 1 100 NP screwdriver UL 2 5 mm screws a Ter mE UT
109. m Configuration This diagram shows the basic system configuration of OKIPAGE 8c LED head Discharging indicators LCL Lr Oparator panel Centronics interface Pulse motors KEP BELT HEATER REGIST FF 910101010 Sensors switches and thermistorsz Paper width sensor Form size detector 4 bits Form end sensor OKI PSIMM 5 x 2 interface interface ua fi t Er FF form end FF home gwitch Form feed sensor 1 Form iged sensor 2 power unit ias V Write sensor Election sensor JL Hich voltage Second tray Toner Low power unit EP Llp Down Waste toner sansar Resist Up Down Cover switch High voltage interlock switch Heater temperature ihermistor Backup temperature thermistor Environment temperature sensor Environment hurridity sensor Oil Faller switch Fixing unit interlock swatch Fixing unit a I Waste toner box switch Balt unit i C EP unit Basic System Configuration Diagram Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX
110. n Normal operation OIL ROLLER LIFE OIL ROLLER LIFE PRINT FONTS kA xA A TONER EMPTY Undefined Undefined Undefined Blink Undefined Undefined Undefined Blink Undefined Undefined Undefined Blink Undefined Undefined Undefined Blink Undefined OFF Blink or ON Undefined OFF ON Blink Blink Indicates that the end of life of the Cil roller assy has been reached Warning Indicates that the end of life of the Cil roller assy has reached Alarm Prints out all character sets fonts for the printer available This operation is started by a command when the READY LED is on orby a switch when the READY LED is blinking Displayed when 50 pages are printed after Toner Low was detected to prompt the user to replace the toner cartridge This message is cleared when the oil roller assy is replaced After the oil roller assy is replaced its counter must be reset See the user s manual This message is cleared when the oil roller assy is replaced After the oil roller assy is replaced its counter must be reset See the user s manual Normal operation This message temporarily disappears when a cover of the page printer is opened but will be displayed every 20 pages until the cartridge is replaced WASTE FULL FRONT TRAY ERROR PRESS RECOVERKEY COVER OPEN Undefin
111. n down the pinch roller 2 The one way clutch gears are made to turn only in a present direction by means of the one way clutches a First and second hopping rollers 1 When the front edge of the paper passes by the pickup roller the pulse motor of the front feeder turns counter clockwise in the direction of to drive the cam The cam moves up the pinch roller 2 Although the one way clutch gear A is also rotating the hopping roller of the front feeder does not rotate because of the one way clutch 2 When the rear edge of the paper passes by the Entrance sensor 2 the pulse motor of the front feeder turns counter clockwise in the direction of b to drive the cam The cam moves down the pinch roller 2 until it is sensed by the sensor Although the one way clutch gear A is also rotating the hopping roller of the front feeder does not rotate because of the one way clutch Cam Idle gear A Hopping roller M Sensor Pickup roller One way clutch gear A Form sensor Idle gear B Pinch roller 2 Resist roller 2 Paper from the tray b Front feeding hopping 1 The pulse motor of the front feeder turns right in the direction of a to drive the hopping roller The paper feeds until the Entrance sensor 2 is activated Although the one way clutch gear B is also rotating the pinch roller 2 does not drive the up down cam because of the one way clutch After the Entrance sensor is activated the paper feeds until it reaches
112. nd Feed Sensor RSPL 8 3 45 Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 51 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 24 Two Lever Input Sensors Lever 2nd Feed Sensor 1 Remove the guide paper input assy See 3 3 23 2 Release the engagement with the guide 3 by pressing the lever input sensors 1 in the arrow direction then remove them 3 Release the engagement with the guide by pressing the lever 2nd feed sensor 2 in the arrow direction then remove the sensor Figure 3 3 24 Two Lever Input Sensors Lever 2nd Feed Sensor 40303301 Paper Input Assy 7 8 3 24 ndude 3 40097301 Paper Input RSPL 8 3 43 40144301 Lever Input Sensor RSPL 8 3 44 40144401 Lever 2nd Feed Sensor RSPL 8 3 45 Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 52 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 25 Roller Registration Roller Assy Hopping 1 gs 3 4 Remove the guide paper input assy See 3 3 23 Remove the bracket hopping motor See 3 3 19 Remove the gear one way See 3 3 20 Hemove t
113. nt display Yellow Magenta Cyan Black Displays the total number of rotations at each color 4 Fuser count display Displays the total number of pages handled by the Fuser which have been counted by the engine 5 Belt count display Displays the total number of pages handled by the Belt which have been counted by the engine 6 Cil roller count display Displays the counter of the oil roller 7 T1 position Setting of standard tray paper feed length oets a value for correcting the amount of paper feeding of the standard tray 8 T2 position Setting of second tray paper feed length Sets a value for correcting the amount of paper feeding of the second tray 9 Engine reset e Resets the contents of all EEPROM areas used by the engine with default values e Does notreset the following items e LED head drive time e Menu level 1 e Menu level 2 e Operator Panel Menu Disable Enable e Page Print Disable Enable Engine Maintenance mode menu system 1 2 Category YELLOW LED HEAD MAGENTA LED HEAD CYAN LED HEAD BLACK LED HEAD Engine Maintenance mode menu system 2 2 Category After pressing After completing the ENTER key process nnnn Tomo RN T nnnnnnn cl nnnn iem T nnnnnnn nnnn To MN RN T nnnnnnn E nnnn Eo RN NN T nnnnnnn m ILL nnnn m l1 J nnnn nnnnnnn T1 POSITION T2 POSITION FF POSITION SETTING EEPROM SETTING EEPROM
114. nter has the following interfaces to the host Centronics bi directional parallel interface OKI HSP interface Option The single effective interface or the automatic interface select mode can be selected using the menu If the busy state of the printer continues for a long time period the buffer near full control releases the busy status at constant intervals even if the host side is busy so as not to cause interface time out at the host side a Centronics bi directional parallel interface This is an interface confirming to IEEE 1284 and provides either unidirectional ad bi directional communications according to each of the following communication modes e Compatibility mode Unidirectional communications from the host to the printer e Nibble mode This mode transfers 4 bit wide data from the printer to the host In this mode each bit of 1 byte data transmits in the form of two nibbles using ERROR BUSY FAULT and SELECT signal leads This mode can provide bi directional operation in combination with the compatibility mode e ECP mode This mode provides the asynchronous bi directional interface and transmits and receives 1 byte data using eight data signal leads under semi duplex control by the host When the power is turned on the compatibility mode is automatically selected The change to another mode form the compatibility mode is made through negotiation When the BI DIRECTION is set to ENABLE in the menu this change can be
115. oard POG PUB earrecthy Mo Connect the LED head assembly to the junction board correcth Yes Check the connectian af the cables or replace the LED head sssembly ts the problem recovered Yes End Check the connection of the cables or replace the punchon board Hecovered Yes End is engine board PX4 connected to the junelian board 06 PCB correctly Mo Connect the engine board to the junction board correctly Yes Check the connection of the cables or replace the engine board PX4 PCB le the problem recovered Yes End is Each terminal of each imege drum unitconnected ta the contact assembly correct See Figure 6 2 1 Mo Maske the terrmnals be in contact with the contact assembly correctly Yes Replace the the image drum unit Notes 1 When rezkacing the engine beard PX4 amp PCB demaunt Ie EEPROM chip Irem the old engine boari and semaunt it on the new one 2 Alter replacing the image drum unit be aure ta reget ita cower in the User Masntenance made 3 After replacing the LED haad assembly be sung to adjust ths deve time and correct ts Gator deviation Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BP X for any updates to this material http bpx okidata com 95 OKI Service Guide OKIPAGE 8c Chapter 6 Troubleshooting Procedures Vertical white Is each LED head tens contaminated
116. of a paper Form present sheet and determines whether the paper 5 OFF Form ejected ejected Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 16 Ok a Service Guide OKIPAGE 8c Chapter 2 Operation 2 5 2 Other sensors 1 Form end sensor This sensor checks whether the paper cassette is empty 2 Front Feeder form end sensor This sensor checks whether the front feeder has paper 3 Front Feeder home switch The microswitch checks whether the front feeder stage is in the up or down position 4 Image Drum Image drum up down sensor for each color Y M C Y Yellow Magenta C Cyan Black 5 Waste toner sensor This sensor judges whether the waste toner cartridge is full by measuring a time period at which the sensor lever turns on periodically When the time period falls under a preset value the system judges that the waste toner cartridge is full and displays the waste toner full message 6 Resist up down sensor This sensor detects the up or down position of the resist roller 2 7 Temperature sensor Refer to 2 7 Transfer Control according to Environmental Changes 8 Humidity sensor Refer to 2 7 Transfer Control according to Environmental Changes Copyright 1998 Okidata Division of OKI America Inc All rights reserved See
117. p Dn 2 See 3 3 13 9 ge Release the lock with the shaft by spreading the claw then remove the gear one way Z30 1 Notice for mounting Mount the gear one way Z30 by fitting it with the shaft link turned in the arrow direction 40208101 Gear One Z30 RSPL 8 545 Figure 3 3 14 Gear One Way 730 Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 42 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 15 Motor Assy Belt 1 Remove the main motor B assy See 3 3 13 2 Unplug 2 cables 1 connected and unscrew 2 screws 2 then remove the motor assy belt 3 Figure 3 3 15 Motor Assy Belt 3 40392301 Motor Assy Belt RSPL 8 5 1 nduds J 40124101 Motor Pulse RSPL 8 5 11 Photo Interrupter RSPL 8 5 39 40135301 40450001 Belt Motor Mech Assy RSPL 8 5 37 Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 43 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 16 Power Supply Unit Holder Inlet Sheet Insulation Remove the motor fan 80 25 See 3 3 2 Remove the frame side L
118. performed For the electrical physical characteristics of this interface see APPENDIX B b OKI HSP interface Option This interface slot is an unique universal interface that provides the platform to connect various boards including those supplied by third vendors such as the LAN connection expansion board and SCSI expansion board Any expansion boards compatible with this interface can be mounted on the Control board the piggyback board from without modifying the program at the printer side Refer to the Conceptual Diagram of the OKI interface Network etc Control board LAN expansion board Conceptual Diagram of OKI HSP Interface 9 RAM module e Pin layout Network etc Control board LAM expansion board e Basic specification Type Access time 7 2 pins SIMM 32 bits buss width Capacity 60ns 7005 80ns Parity 4 8 16 32 or 64MB None Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BP X for any updates to this material http opx okidata com Page 9 Service Guide OKIPAGE 8c Chapter 2 Operation 2 2 Engine Control Board PX4 PCB ANALOG INPUT Heater temperatures and environmental humidity and temperature Yellow Y Magenta M Cyan C Black B ANALOG INPUT Heater temperatures and envirnment humidity and temperature CPU EEPROM MSMB5524 BOM
119. r supply fs tha problem recovered Ered la 32 on the power connector of the engine board PA4 PCB being supplied ag V Pin 7 B 9 10 Check the connection of the cables or replace tha low voltage power supply ls 32V on pin 2 of the HVOLT connector af the engine board P24 PCB being supplied Replace the engine board Check the connection af the cables replace the high valtage power supply or cassette assembly is the problem recovered Ered each terminal of each image drum unit connected to the contact assembiy correctly See Figure 6 3 6 39 No the terminals be in contact with the contact assembly correctiy Yes Replace the the image drum unit Notes 1 When replacing the engine board PX4 damount the EEPROM chip from the old enne board and remount it on the new 2 After repiacinag the imaga drum urit and te bell cassette assembty sure to rasel er counters in ihe User Maintenance moda 3 After replacing te LED head assembly be sureto adjust its drive time and carrect its color Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BP X for any updates to this material http opx okidata com 99 Service Guide OKIPAGE 8c Chapter 6 Troubleshooting Procedures Poor synthesization Color Correct color dawiations of aach LED head by COLOR REG ADJLEST EXECUTE 15 t
120. r turns on the hopping roller keeps on feeding the paper until it hits the resist roller 1 This operation corrections any paper skew Resist roller 2 One way gear C i i Resist roller 1 i de gear C One way gear B P d cm a Idle gear A Idle gear B d a a a First hopping roller Pulse molor One way gear A b Conveying 1 After paper hopping is completed the pulse motor turns right in the direction of b to drive the resist rollers 1 and 2 The resist rollers feed the paper until the Form sensor turns on Although the one way gear A is also driven the hopping roller does not turn because of the one way clutch 2 The paper is further fed in synchronism with the print data Hesist roller 2 f One way gear C Hesist roller 1 Idle gear C One way gear B Idle gear Idle gear B Pd First hopping roller Pulse motor 4 One way gear A 2 The hopping operation of the front feeder and the up down operation of the pinch roller 2 are performed by a single pulse motor Cam One way clutch gear B Idle gear A Sensor position Hopping roller Am Uprdown Pinch roller One way clutch gear A Idle gear B Form sensor Entrance sensor Resist roller 2 When the pulse motor of the front feeder turns right in the direction of A the front hopping roller turns left in the direction of b to drive the cam This cam moves up a
121. rd PXF Pin B13 for the yellow IDU sensor Pin A13 for the magenta IDU sensor Pin B14 for the cyan IDL sensor Pin AT4 for the black IDU sensor Replace the junction board PAF PCB Check the connection of the cables between the junction board PXF and the engine board PX4 PCB or replace the engine board Fusing Unit Error Is the Fusing unit trouble occur immediately after tha page printer is powered or Yes Heat roller thermistor open or shorted See Figura 6 1 Na Normal registance and temperature are about between ohms the 700 ohms at rom temperature between CC the 43 C Yes 15 the voltage being supplied on pin 8 of the FHEAM connector of the engine board PCB Normaly Voltage between 0 03V and 0 25V Yes Replace the engine board Replace the fusing unit Is Backup roller thermistor open or shorted See Figura 6 1 about 90 ohms to 700 ohms at room temperature C C to 43 C Yes isthe voltage being supplled on Pind ef the THERM connector af the engine board PX4 PCB normal Normaly Voltage between 0 03 and 0 25V No Replace the engine board Yes Haeplace the fusing unit Yas Yes No No Yas Is Fusing unit trouble occur about 3 minutes elapsed after the page printer is powered Go to Is Fusing unit heater turn Is ihe heater hot ls the voltage being supplied pin 6 of the THERM connector of tha engine board PX4 PCB
122. reful not to lose the knock pin which clips off together when removing the roller assy hopping 2 Detach the roller hopping 2 from the shaft 1 Figure 3 3 26 Hopping Roller Assy 140310601 Assy Hopping RSPL 8 3 23 includes NEN 2 40449701 Hoping Roller Boss Assy 8 3 42 1 40189601 Shaft Hopping Roller 1st RSPL 8 3 46 4 50608118 NK3 18 SUS Knock Pin 8 3 50 3 40743701 Roller Assy Hopping Sub RSPL Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com 54 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 27 PXU PCB PXM Lever Resist Sensor Since the PCB and PXM PCB are connected with each other via the cable remove them at the same time 1 Remove the guide paper input assy See 3 3 23 2 Unscrew 4 screws 1 and unplug the cable 2 then remove the PXU PCB 3 and PXM PCB 4 at the same time 3 Remove the lever resist sensor 5 by releasing the engagement with the guide D PXU PCB Figure 3 3 27 PXU PCB PXM PCB Lever Resist Sensor Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 55
123. rn 4 Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 111 Ok a Service Guide OKIPAGE 8c Chapter A Illustrated Parts List Diagram 9 Main Motor Assy Number Number Number Description 40129401 Frame Motor ID 40124101 Motor Pulse ID 40129901 Gear 25 75 40130701 Gear Helical 67 43 24 40130601 Gear Helical 67 18 40130201 Gear 253 44 40129501 Bracket Support ID 40135301 Photo Interrupter Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 112 OKI Service Guide OKIPAGE 8c Chapter Product Accessory Second Paper Feed Preface This Maintenance Manual is intended for the maintenance personnel and describes the field maintenance methods for High Capacity Second Paper Feeder option of OKIPAGE 10i Series LED Page Printer Refer to the Printer Handbook for equipment handling and operation methods Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 113 OKI Service Guide OKIPAGE 8c Chapter Product Accessory Second Paper Feed 1 0 Outline 1 1 Functions
124. s 0 00 40449401 Assy Heat RSPL 8 3 41 40264401 Spring Eject Heat RSPL 8 3 49 40162201 RSPL 8 3 54 40437501 PXL PCB RSPL 8 3 56 Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 72 Ok a Service Guide OKIPAGE 8c Chapter 3 Disassembly 3 3 45 Holder LED Assy LED Head 1 Unplug the cable 1 2 Remove the LED head 3 by spreading the holder LED assy 2 a little bit Be careful not to lose the spring 4 which slips off together 3 Remove the holder LED assy 2 by spreading the A part of the guide holder a little bit with a flat blade screwdriver Be careful not to lose the spring 5 which slips off together Guide Holder Figure 3 3 45 Holder LED Assy LED Head Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 73 OKI Service Guide OKIPAGE 8c Chapter 4 Adjustments 4 Adjustments Adjustments are carried out by key operations on the operator panel by software operation panel and by EEPROM of PU PXS PCB setting This page printer supports three maintenance modes Select and enter a maintenance mode fit for the adjustment 4 1 Maintenance Modes and Their Functions
125. s the Roller G and feeds the paper into the printer until it reaches the registration roller of the printer oN Roller Roller C Hopping roller gear Planet gear D gear Hopping motor Once the delivered into the printer the paper is then controlled and fed through by the registration motor of the printer Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 118 Ok a Service Guide OKIPAGE 8c Chapter Product Accessory Second Paper Feed 2 2 Hopper Mechanism The hopper automatically feeds the printer with the paper being sent single sheet at a time When the paper is loaded in the paper cassette it is then transported by the hopping motor carrying forward only a single sheet at a time caught by hopping roller at a time ID und deam ctualer Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 119 Ok a Service Guide OKIPAGE 8c Chapter Product Accessory 1 Second Paper Feed 3 0 PARTS REPLACEMENT This section covers the procedures for the disassembly reassembly and installations in the field This section describes the disassembly procedures and for reassembly procedures basically proceed with the disassemb
126. ssy 40218301 Torsion Spring B 56636301 Flat Cable Clip 56636201 1 25 14 140 1056 1 2896 40547301 LED HEAD 40456101 JST12 AMP15 AMP10 AMP9 40410701 Frame Upper Assy 56636206 HGCUJ 1 25 12F 160 56730960 PXW26 1250B 40700401 Film FG Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 109 Ok a Service Guide OKIPAGE 8c Chapter A Illustrated Parts List Diagram A7 Guide Cassette R Assy Number Number Number Description 1 40449801 Guide Cassette R Sub Assy 2 50928901 Spring Detector 3 56730640 Square shaped connector 4 40177701 Connector Cord 5 40368301 PCB PXC 6 53346601 Plate Earth Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 110 Service Guide 8c Chapter A Illustrated Parts List Diagram 8 Main Motor A Assy Number Number Number Description 1 40165301 Frame Motor 101 40124101 Motor Pulse ID 40129901 Gear 25 75 40130701 Gear Helical 67 43 24 40130601 Gear Helical 67 18 40130201 Gear Z53 44 40129501 Bracket Support ID 40135301 Photo Interrupter 40308601 Toner Sensor Y Assy 40135301 Photo Interrupter 40449601 Sensor Assy T Y ON O1 BRB W
127. tage applied to charging roller Voltage applied to developing roller Y M C K 250V 300V 232V 300V First paper Y only K 270V 300V Transparency Y M C 200V 300V K 250V 300V NEN Y M C K 650V 0V Voltage applied to toner roller roller Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 11 Service Guide OKIPAGE 8c Chapter 2 Operation 2 4 Mechanical Processes Here is the Mechanical Process Diagram of OKIPAGE 8c oo jo Jaded Burddou BuilaAuaa adeg dnyad sadeg 5 1 Gum uogaala Jade 151 ddl jala 2819 g Jelo Aiding buiddopi ESH Fajsug 1 105099 Bless nr pag 151881 pa 0 ina um qm j Jaded ia Madea uad 205095 2208095 paa uo d apa AMAN NE NEN RENE KNEE NM euo 3 ao pled 19001 105095 uogaala Jaded Buiuea ee m Ards m o p 1 DuiBieu Wo oW A peay q31 fhuddne mee ERR eng jeus 007 JJa uoe 19024 Mechanical Process Diagram Figure 2 5 Cop
128. ted pin of the FSENS connector of the junction board PXF PCB Fin z for Write sensor Mo Check the connection of the cables or replace the sensor board PXM Yas Is tha Junction board PXF PCB werk correctly Operate tha Write sensor lever and check its signal on the related pin of tha PXFIF connector of the junction board PXF PCB Pin AB for Write sensor Replace the junction board PXF PCB Yas Check the connection of the cables between the junction beard PAF and tha engine board PX4 er replace the engine beard Connection correcthy Connect the cables correctly Yas Replace the engine board re image Drum Unit DU Up Down Error Turn off power to the page printer wait law seconds than turn on power Each image drum unit DU motor rotating ter printout Is the value of DOU motor resistance about 7 1 ohms Hepiace the defective IDU motar Yes 15 321 being supplied on the FL of the engine board tha low voltage power supply Yes Check the connection af the cables or replace the engine board Yas Yes Yas Each IDU sensor lever work correctly Check the gear engagement and tha sansor lever operation or replace the gear or the sensor lever each OU sensor work correctly Cover up for each IDU sensor to shud off light and check its signal on the related of the PXFI connector of the junction boa
129. the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 17 Ok a Service Guide OKIPAGE 8c Chapter 2 Operation 2 6 Correction of Color Deviation OKIPAGE 8c is equipped with an array of I D units which cannot be from generation of color deviations This mechanic below 1 Color deviations to be corrected 1 Color deviation in the X axis Positional error of the LED head 2 Diagonal color deviation Positional error of the LED head Color deviation in the Y axis Positional errors of the I D units and light receivers 2 Method of correction Print out the preset color chart compare the printed color chart by the original color chart and enter the amount of color deviation of each color from the operator panel or from the host computer OKIPAGE 8c calculates correction values from the entered values and changes the write timing of each color cyan magenta and yellow relative to black Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 18 Ok a Service Guide OKIPAGE 8c Chapter 2 Operation 2 7 Transfer Control according to Environmental Changes Transfer Control according to Environmental Changes Room Temperatures and Relative Humidities OKIPAGE 8c measures the room temperature and humidity It uses a room temper
130. the surface of the image drum onto the surface of the paper Transfer roller Pie sughe unt 7 Fixing The toner image just transferred to the paper is fused and fixed to the paper while the paper is passing through the gap between the heat roller and the backup roller The teflon coated surface of the heat roller is heated by the 800 watt heater or a halogen lamp in the heat roller The temperature of the heat roller surface is controlled by a thermistor in contact with the surface of the heat roller A thermostat is provided for safety When the heat roller temperature rises above the preset temperature the thermostat opens and shuts off power to the heater in the heat roller The backup roller is evenly pushed against the heat roller by two end springs Heat roller Pa Themnsior Backup roller 8 Cleaning The toner which remains on the OPC Image Drum without being fused is scraped by a cleaning blade and discarded in the waste toner tank UPC drum Transfer roller Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 13 OKI Service Guide OKIPAGE 8c Chapter 2 Operation 2 4 2 Paper running process How paper moves through the OKIPAGE 8c is shown in the Paper Route Diagram YzYellow M Magenta K Black aid 1 1 4 i A
131. tner Exchange BPX for any updates to this material http opx okidata com Page 100 Ok a Service Guide OKIPAGE 8c Chapter 7 Wiring Diagram 7 1 Resistance Check Between pins 1 and 2 7 19 Between pins 3 and 4 7 142 Between pins 1 and 2 7 10 YIDU matar Between pins 3 4 7 10 Between pins 1 and 2 710 motor Between ping 3 4 7 10 Qe Between pins 1 and 2 7 112 Betwean pins 3 and 4 7 112 Betwean pins 1 amd 2 7 152 Betwean pins 3 and 4 7 142 h Between pins 1 and 2 7 12 Resist motor i Between pins 3 and 4 7 1412 B twean pins 1 and 2 710 Between pins 3 and 4 710 Between pins 1 and 2 7 142 FF molior a Between pins 3 and 4 7 15 Hasler malor pins 1 ard 2 70082 Between pire 1 ard 2 Between pins c and 415 20669 a1 2590 Between pire eendi 20586 ad 2590 B lbwesn a and b 2 200 01201 al 2500 B 1240 al 25 Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 101 Ok a Service Guide OKIPAGE 8c Chapter 7 Wiring Diagram 7 2 Program Font ROM Location 1 PCR PCB Main Board 2 PX4 PCB Engine Board 0 m 3 Power Supply PCB 4 5 Copyright 1998 Okidata Division o
132. tte switch board AOLD PCB Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 138 OKI Service Guide OKIPAGE 8c Chapter Product Accessory Second Paper Feed 5 2 PCB Layout TQSB 2 PCB Copyright 1998 Okidata Division of America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 139 Service Guide OKIPAGE 8c Chapter Product Accessory Second Paper Feed Ouid 6 PARTS LIST High Capacity Second Paper Feeder 2nd Tray Assembly Copyright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 140 OKI Service Guide OKIPAGE 8c Chapter Product Accessory Second Paper Feed High Capacity Second Paper Feeder Table 6 1 High Capacity Second Paper Feeder No Description OKHJPart 1 Pd Feed roller 56408701 Qty 1 Hopping motor 56511901 Hopping gear 51235001 5 7 5 _ Hopping roller assy 7 50407901 6 jFeedrdlergear 1 7 _ Feed roller bearing 8 Feedidlegear 51235201 9 Planetgear 7 51256301 55077511 Copyright 1998 Okidata Division of
133. y Rear 28 9 9 2 Motor Fan 80 25 29 3 3 3 Paper Eject Assy 30 3 3 4 Cover Assy Stacker Guide Eject FD Assy 31 3 3 5 Upper Frame Assy 32 3 3 6 Plate Support Assemblies 33 9 9 Limiter 2way L Plate Guide L R 34 3 3 8 Cover 35 3 3 9 PCR PCB Assy 36 9 9 10 Motor Fan 3 3 3 11 PXF PCB PX4 PCB 38 3 3 12 Gear Heat Assy 39 Table of Contents Page 3 3 13 Main Motor B Assy 40 Q 9 14 Gear One way 230 41 0 3 15 Motor Assy Belt 42 9 9 16 Power Supply Unit Holder Inlet Sheet Insulation 43 9 9 17 Sensor Assy Box Toner 44 3 3 18 Square shaped Connector 45 0 3 19 Motor Pulse ID 46 3 3 20 One way Gears 47 3 3 21 Feeder Unit Front 48 3 3 22 Manual Feed Hopper Assy 49 3 3 23 Guide Paper Input Assy 50 3 3 24 Two Lever Input Sensors Lever 2nd Feed Sensor o1 3 3 20 Roller Registration Roller Assy Hopping 52 3 3 26 Hopping Roller Assy 53 3 3 27 PXU PCB PXM PCB Lever Resist Sensor 54 3 3 28 Paper End Lever 55 3 3 29 PCO PCB Operator Panel 56 3 3 380 Holder Gear Toner Assy 57 3 3 31 Plate Latch Lever FD Spring Latch Lever FD 58 3 3 32 Transfer Belt 59 3 3 33 High Voltage Power Supply Unit Bracket HV 60 Assy 3 3 04 Eraser Bracket Assy Eraser Bracket KCM Assy 61 3 3 35 Shaft Link 62 9 9 96 Contact Bracket BL R Assy Contact Bracket CL R 63 Assy 3 3 3 Contact BL L
134. yright 1998 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com 12 Ok a Service Guide OKIPAGE 8c Chapter 2 Operation 2 4 1 Electrophotographic processing mechanism 1 2 Electrophotographic processed Each process of the electrophotographic processing mechanism is outlined below 1 Paper pickup This process causes the roller to give a DC voltage to the paper resulting in a negative charge With this negative charge the paper is electrostatically attracted to the roller 2 Charging This process gives a DC voltage to the charge roller so that the image drum may have a uniform negative charge on its surface 3 Exposure This process causes the LED head to apply light beams according to image signals to the negatively charged surface of the image drum The negative charge on the illuminated surface of the image drum is reduced according to magnitudes of the light beams Thus a latent image is formed on the surface of the image drum according to the resulting surface potentials 4 Developing and recovery of excessive toner This process applies negatively charged toner to the surface of the image drum The toner is electrostatically attracted to the latent image to form a visible image on the surface of the image drum Simultaneously this process electrostatically transfers excessive toner

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