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Service Guide OKIPAGE4w

Chapter 3 Parts Replacement

High-Voltage Power Supply Board

(1) Remove upper cover assy.

(See Upper Cover Assembly in this Chapter).

(2) Remove three screws

and draw out high-voltage power supply board

(3) Disconnect all the cables

from high-voltage power supply board

and remove high-voltage power

supply board

Caution:

Note the following when assembling the high-voltage power supply board:

- Mount the high-voltage power supply board with top cover assy removed or open.

- Take care that cable

will not interfere with the paper sensor exit when it is connected.

Summary of Contents for OKIPAGE4w

Page 1: ...Thank You for purchasing this Factory Service Manual on EBAY from PCTECHINFO Click Here for more Factory Service Manuals for other Computer and Printer Copier Manufacturers from PCTECHINFO ...

Page 2: ...th the pictures rendered at 300 dpi which is ideal for printing but does not view on most displays well Okidata is a registered trademark and OkiPage is a trademark of Oki Electric Industry Co Ltd HP LaserJet and PCL5e are trademarks of Hewlett Packard Co Adobe and Acrobat are trademarks of Adobe Systems Incorporated Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OK...

Page 3: ...d warm up 15 Charging 16 Exposure 17 Development 18 Transfer 19 Fusing 20 Cleaning 21 Paper Jam Detection 22 Toner Low Detection 23 Cover Open 24 3 Parts Replacement Parts Replacement 25 Precautions for Parts Replacement 26 Parts Layout 27 Base Frame Unit 28 Base Plate Unit 29 Replacing Parts 30 Extend Plate 31 LED Head and Head Spring 32 Transfer Roller 33 Upper Cover Assy 34 High Voltage Power S...

Page 4: ...roubleshooting 59 The OKIPAGE 4w malfunctions after the power supply has been turned on 60 JAM error Paper input jam 61 JAM error Paper feed jam 62 Paper exit jam 63 Paper size error 64 Fuser assy error 65 Image Troubleshooting 66 An image is light or blurred entirely 67 Dark background density 68 Paper is blank 69 Vertical black band stripe 70 Cyclic defect 71 Print voids 72 Poor fusing 73 Vertic...

Page 5: ... Maintenance Utility Outline Of Maintenance Utility 89 ROLE OF MAINTENANCE UTILITY 90 OUTLINE OF MAINTENANCE UTILITY FUNCTIONS 91 DETAIL OF EACH FUNCTION Engine Menu Setting 92 Engine Counter 93 Exit 94 Printer Status 95 Test Print 96 Option 97 About 98 Reload 99 ...

Page 6: ...es for OKIPAGE 4w LED Page Printers This manual is written for use by service personnel Refer to the customer documentation for handling and operating procedures Copyright 1997 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 7: ...guration The OKIPAGE 4w consists of a control block a power supply unit and an engine block See Figure 1 1 Figure 1 1 Copyright 1997 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 8: ... Printer Configuration The printer unit consists of the following five hardware components Electro Photographic Processor Paper Feeder Main Control Board High Voltage Power Supply Board Power Supply Unit Figure 1 2 is the configuration of the printer unit ...

Page 10: ...355 6 mm Max x 8 5 215 9 mm Thickness Automatic feed 16 to 28 lbs 60 to 90 g m 2 Manual feed Label Envelope OHP paper transparency 6 Printing speed First print 25 seconds A4 after warm up Continuous print 4 sheets minute A4 Warm up time 40 seconds 120 VAC for ODA 230 VAC for OEL INT at room temperature 77 F 25 C 7 Paper feeding method Automatic paper feed or manual paper feed 8 Paper delivery meth...

Page 11: ...ring operation 48 dB A or less Standby 38 dB A or less 14 Consumables Toner cartridge kit 1 000 5 duty Image drum cartridge 10 000 at continuous printing Copyright 1997 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 12: ...ertification Label The safety certification label is affixed to the following location of the OKIPAGE 4w Copyright 1997 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 13: ...ocations that may cause bodily injury During maintenance do work with enough care while following instructions on these warning labels Copyright 1997 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 14: ...its the received data while storing print data from the interface in memory It sequentially transfers the edited data to the LED head for each dot line The electro photographic processor then prints the data on sheets of paper The display of the higher level host is used for device operation and status display Figure 2 1 is the block diagram of the OKIPAGE 4w Figure 2 1 Block Diagram Copyright 199...

Page 15: ...l bus 10 MHz clock incorporating mask ROM and CPU peripheral devices This CPU has the functions listed in the table below 2 Program ROM Program ROM contains a program for the equipment EPROM is used as program ROM When mask ROM in the one chip CPU explained in 1 above is valid the EPROM is not mounted For details on short wiring setting see Section 7 2 3 DRAM DRAM is used as resident memory 4 EEPR...

Page 17: ...nit supplies 5 V and 24 V to the main control board from 230 VAC 120 VAC The power supply unit also contains a heater drive circuit Copyright 1997 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 18: ...control sequence from the main control board When the cover is open 5 V supply is automatically interrupted to stop high voltage output Caution The TR voltage varies with medium and transfer roller impedance 2 Sensors The high voltage power supply board consists of the high voltage power supply circuit that supplies power to the electro photographic processor system and the photosensor that detect...

Page 19: ...ding ON Paper exists OFF No paper exists Outlet sensor Monitors paper feeding and the paper size according to the paper sensor arrival and passing time ON Paper exists OFF No paper exists Toner sensor Detects the low toner status ON long Toner low OFF short Toner high Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any update...

Page 20: ... This electrostatic latent image is formed by light from the LED heads 2 Electromagnetic clutch The electromagnetic clutch controls the rotation of the hopping roller according to signals from the control board 3 Pulse motor Main This pulse motor of 48 steps rotation is two phase controlled by the signal from the main control board it controls feeding by changing rotation direction and turning on ...

Page 21: ...ssy consists of a heater a heat roller a thermistor and a thermostat The power supply unit applies AC voltage to the heater according to the HEATON signal from the main control board this heats the heat roller The main control board monitors the heat roller temperature via the thermistor and keeps the temperature constant by turning on off the heater voltage If the heat roller temperature rises ab...

Page 22: ...ostatic latent image on the image drum by static electricity This adhesion causes the electrostatic latent image to change to a visible image At the same time the residual toner on the image drum is attracted to the developing rollerby static electricity 4 Transfer When paper is placed over the image drum surface the transfer roller applies a positive charge which is opposite in polarity to that o...

Page 24: ... is turned on off according to whether current to the coil is on or off When the clutch is OFF When the clutch is ON When the clutch is on the hopping gear engages with the clutch plate to turn the hopping roller When the clutch is off the hopping gear is separated from the clutch plate by the spring for resetting so that the hopping roller does not turn ...

Page 26: ...e pulse motor main in direction a The planetary gear rotates in direction a dislocating its position in direction a This causes the planetary gear to be separated from gear A The hopping gear will not rotate The triple gear and transfer gear rotate via the idle gear to drive the image drum unit At printing ...

Page 27: ...s further in synchronization with the print data Copyright 1997 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 28: ...ging is performed by applying DC voltage to the charge roller in contact with the surface of the image drum Copyright 1997 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 29: ...arged surface of the image drum The surface potential of the irradiated surface attenuates to form the electrostatic latent image corresponding to the image signal Copyright 1997 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 30: ...g the toner to the developing roller The developing roller surface has a positive charge while the toner has a negative charge 2 The toner attracted to the developing roller is scraped off by the developing blade forming a thin coat of toner on the developing roller surface 3 Toner is attracted to the exposed low potential portion of the image drum at the point of contact between the image drum an...

Page 31: ...from the reverse side High voltage from the power supply creates a positive charge on the surface of the transfer roller which in turn transfers the charge to the paper as it contacts the transfer roller The image drum surface attracts the negatively charged toner and the toner transfers to the paper as a result of the positive charge on the reverse side of the paper Copyright 1997 Okidata Divisio...

Page 32: ...ats the heat roller The thermistor on the surface of the heat roller keeps its temperature constant A thermostat is also installed for safety If temperature rises abnormally this thermostat opens to suspend voltage to the heater The back up roller is pressed against the heat roller by the pressure spring on each side Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OK...

Page 33: ...ing roller temporarily draws in the residual toner adhering to the image drum with static electricity and then returns it to the image drum Copyright 1997 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 34: ...he outlet sensor within a fixed time after it has passed the paper sensor Paper outlet jam The trailing part of the paper does not pass the outlet sensor within L mm after the leading part of the paper has passed the outlet sensor 2 52 64 mm L 15 77 400 6 mm Paper size error The trailing part of the paper does not pass the paper sensor within L mm after the leading part of the paper has passed the...

Page 35: ...sensor OFF 121 9 20 0 20 0 Unit mm Timing Chart for Paper Feed Tray Feed Copyright 1997 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 36: ...ing conditions are shown in the figure below The toner sensor is not monitored when the drum is inactive a When the toner low state is detected twice Toner Low occurs This state is monitored at a cycle of 40 milliseconds b When the toner full state is detected twice Toner Low is released This state is monitored at a cycle of 40 milliseconds c When the toner sensor does not change over two cycles T...

Page 37: ... 100 2 The basic rotation cycle of the toner sensor is as follows T time Basic rotation cycle of toner sensor 4 9 sec Toner low time t1 1 2 sec Toner full time 1 2 sec t1 Copyright 1997 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 38: ...supply to the high voltage power supply This stops all high voltage outputs At the same time the CVOPN signal is issued to notify the main control board of the switch status and cover open processing is executed Copyright 1997 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 39: ...n the field The replacement procedures to be explained here include disassembling not assembling When reassembling parts assemblies and units reverse the disassembling steps Copyright 1997 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 40: ... to the printer ii Connect the AC cord to the power outlet iii Turn on the printer s POWER switch 2 Do not disassemble parts as long as the printer is operating normally 3 Minimize disassembling Only the parts indicated in the parts replacement procedures can be disassembled 4 Use only the specified maintenance tools 5 Disassemble parts in the specified sequence otherwise parts may be damaged 6 Te...

Page 41: ...ls necessary for parts replacement Maintenance Utility Table 3 2 Maintenance Utility Copyright 1997 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 42: ...t Parts Layout This section explains the layout of main parts Upper Cover Assy Figure 3 1 Copyright 1997 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 43: ...e Guide OKIPAGE4w Chapter 3 Parts Replacement Copyright 1997 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 44: ...e Guide OKIPAGE4w Chapter 3 Parts Replacement Copyright 1997 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 45: ...lacement Replacing Parts This section explains how to replace parts and assemblies Copyright 1997 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 46: ...s Replacement Extend Plate 1 Remove two claws and remove paper support assy 1 Copyright 1997 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 47: ... cover assy 1 2 Remove the left clamp and LED head 2 Then remove flat cable assy 3 and FG cable 5 3 Remove two head springs 4 Copyright 1997 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 48: ...y 1 and remove image drum unit 2 2 Remove the right claw Then remove transfer roller 3 two registration bearings 4 and gear T5 Copyright 1997 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 49: ...ket 2 Disconnect interface cable 1 3 Open top cover assy 2 and remove image drum unit 3 4 Move paper guide L 4 and paper guide R 5 on the rear of the printer to the center 5 Remove two front claws of upper cover assy 6 and two rear screws A and lift upper cover assy 6 6 Remove spur gear A 7 guide slide L 8 and guide slide R 9 7 Remove lamp 10 ...

Page 51: ...t high voltage power supply board 2 3 Disconnect all the cables 3 from high voltage power supply board 2 and remove high voltage power supply board 2 Caution Note the following when assembling the high voltage power supply board Mount the high voltage power supply board with top cover assy removed or open Take care that cable 3 will not interfere with the paper sensor exit when it is connected ...

Page 53: ...ee Upper Cover Assembly in this Chapter 2 Remove the LED head See LED Head and Head Spring in this Chapter 3 Press the left clamp outward and remove the engagement and top cover assy 1 Tension spring 2 also comes off at the same time 4 Disconnect connector CN6 and remove flat cable assy 3 5 Remove screw 5 and remove FG cable 4 ...

Page 55: ...r 2 Remove paper holder 1 3 Unlock and remove paper guide L 2 and paper guide R 3 4 Remove the claw and remove hopper spring 4 5 Remove the claw and remove stopper spring 5 Copyright 1997 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 56: ...r assy See Upper Cover Assembly in this Chapter 2 Remove two screws 1 and two claws then remove plate side M2 3 Remove grounding plate 3 two idle gears P 4 idle gear M 5 idle gear 3R 6 idle gear 2R 7 idle gear heat 8 idle gear R 9 and gear R 10 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http ...

Page 57: ...n this Chapter 2 Move registration roller 1 to the right and remove it by lifting Two registration bearings 2 also come off at the same time Take care not to lose them Copyright 1997 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 58: ...Assy and Flat Cable Assy in this Chapter 3 Remove two screws 1 from cover head assy Section 3 3 11 lift the fuser assy and remove idle gear E A 2 and idle gear E B 3 4 Unlock and remove eject roller shaft 4 5 Remove two eject rollers 5 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okida...

Page 59: ...ter 2 Remove the high voltage power supply board See High Voltage Power Supply Board in this Chapter 3 Remove two screws 1 disconnect connector 2 and remove heat assy 3 Note Do not disconnect lamp ground screw on left side of fuser Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner ...

Page 60: ...Exchange BPX for any updates to this material http bpx okidata com ...

Page 61: ...e Upper Cover Assy in this Chapter 2 Remove the high voltage power supply board See High Voltage Power Supply Board in this Chapter 3 Remove the fuser assy See Fuser Assy in this Chapter 4 Remove the engagement with the left ground then pressure roller B1 Two bearing BUs 2 and two bias springs 3 also come off at the same time ...

Page 63: ...o the hole on the side of base frame 3 remove the inlet claw from base frame 8 and remove inlet 2 5 Disconnect three cables 4 and connector 11 and remove base frame 3 Then remove screw 10 and disconnect FG cable 12 Disconnecting connector 11 Remove connector 11 by drawing it upward while pushing the clamp lever with a standard screwdriver 6 Remove the paper holder assy See Paper Holder in this Cha...

Page 65: ...gh Voltage Power Supply Board in this Chapter 3 Remove side plate M See Side Plate M and Idle Gear in this Chapter 4 Remove the base frame See Separator Guide in this Chapter 5 Remove two screws 1 and remove pulse motor main 2 Copyright 1997 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 66: ... in this Chapter 5 Remove the sheet guide See Sepator Guide in this Chapter 6 Remove side plate M See Side Plate M and Idle Gear in this Chapter 7 Raise up roller holder 3 slide hopping shaft assy 1 and remove roller holder 3 and hopping roller 4 Knock pin 5 also comes off at the same time Take care not to lose it 8 Draw out hopping shaft assy 1 to the right and remove magnet H6 Copyright 1997 Oki...

Page 67: ...Voltage Power Supply Board in this Chapter 3 Remove the base frame See Separator Guide 4 Remove the paper holder assy See Paper Holder in this Chapter 5 Remove the sheet guide See Separator Guide in this Chapter 6 Remove the fuser assy See Fuser Assemby in this Chapter 7 Remove eject roller shaft See Eject Roller Shaft and Eject Roller in this Chapter 8 Remove paper sensor E1 9 Remove paper sensor...

Page 69: ...2 Remove the base frame See Separator Guide in this Chapter 3 Remove two screws 1 disconnect connector 2 and remove power supply unit 3 4 Remove insulation sheet 4 5 Remove two screws 5 and remove main control board 6 from base plate 7 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner ...

Page 70: ...Exchange BPX for any updates to this material http bpx okidata com ...

Page 71: ...EPROM on the main control board The printer driver or maintenance utility can be used to change these values Only service and maintenance personnel may use the maintenance utility This utility cannot be made public for end users Copyright 1997 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 72: ...rum counter reset Printer menu default Cleaning page generation Figure 4 1 1 Drum counter reset This function resets the life of the drum counter when the image drum unit is replaced Clicking the Drum Count Reset button resets the life 2 Printer menu default This function returns the user set menu contents to default settings Clicking the Default button ...

Page 73: ...it is used when printing is unclear For details on how to operate this function refer to Soft Manual or Printer Information Guide 4 1 2 Engine Maintenance Utility See Appendix C Copyright 1997 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 74: ...e Caution When the luminous intensity of a new LED head is the same as that of the old LED head do not set the LED head drive time Use LED Head Making No in the engine menu tab of the maintenance driver to set the luminous intensity displayed on the LED head as the LED head drive time See Figure 4 2 Luminous intensity of LED head Figure 4 2 4 2 2 Setting the LED Head Dot Count There are two possib...

Page 75: ... The read EEPROM data is displayed in Dialog of the maintenance driver 5 Leave the display of the maintenance driver as is and replace the main control board 6 Click the Download button Download EEPROM Data in EEPROM Operations EEPROM data write is completed Depending on the level of a main control board failure parallel I O failure etc however EEPROM data may be unable to be uploaded In such a ca...

Page 76: ...t Name Replacement Time Parts to be Checked Simultaneously Remarks Toner cartridge When Toner Low is displayed LED head Consumables Image Drum unit When Changed Drum is displayed Consumables Caution Also reset the drum counter when replacing the EP unit Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this mater...

Page 77: ...he LED Lens Array When a white band or a white stripe void light printing occurs in the vertical direction of the print surface clean the LED lens array or replace the toner cartridge Caution Be sure to use an LED head cleaner to clean the LED lens array Figure 5 1 1 Set the LED head cleaner in the LED lens array as shown in the figure below and slide the cleaner left and right several time to cle...

Page 78: ...Figure 5 2 Copyright 1997 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 79: ...er Information Guide or Soft Manual 2 Gather as much detailed failure information as possible from the customer 3 Check the printer under conditions close to that under which the failure occurred Copyright 1997 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 80: ... ambient conditions 2 Have consumables toner and image drum been replaced as needed 3 Is paper in good condition Does it meet the specifications 4 Is the image drum seated properly Copyright 1997 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 81: ... on it 2 Do not expose the image drum to direct sunlight 3 Do not touch the fuser because it heats up during operation 4 Do not expose the image drum to light for more than five minutes at room temperature Copyright 1997 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 82: ... one LED This LED indicates status as follows Printer Status LED Indication Ready Lighting Printing in progress Blink 1 Recoverable alarm Blink 2 Unrecoverable alarm Blink 3 1 The LED blinks at a cycle of 1 second 0 5s ON from data reception to printing end 2 The LED blinks at a cycle of 0 24 second 0 12s ON 3 The LED blinks at a cycle of 0 24 second 0 12s ON Copyright 1997 Okidata Division of OKI...

Page 83: ...oubleshooting If a problem occurs in the OKIPAGE 4w troubleshoot according to the following procedures Copyright 1997 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 84: ...s faulty Install the image drum or replace the toner sensor Normal status Change Drum 10 02 Image drum is nearing end of life Replace the image drum Note Be sure to reset the drum counter after replacing the image drum Normal status Manual Paper In 12 20 The paper is in the manual feed mode Normal operation Normal status Printing In Progress 14 20 Printing in progress Normal operation Normal statu...

Page 85: ...clear the error display close the cover Cover Open Cover Open 4F 00 The upper cover is open To clear the error display close the cover If this error occurs frequently replaced the power supply board Buffer overflow Page Buffer Overflow 40 01 The page buffer overflowed because there are a large number of print data To release the error display press the reset button on the status monitor of the pri...

Page 86: ...ace it Device configuration error Fuser Error 60 80 A heater timeout error occurred See Fuser Assy Error Device configuration error Thermistor Error 60 90 A thermistor error occurred Replace the heat Assy Device configuration error Thermistor Open Check Error 60 91 The thermistor is open Replace the heat Assy Device configuration error Thermistor Short Check Error 60 92 A thermistor short occurred...

Page 87: ...Troubleshoot these failures according to the following troubleshooting flowcharts Caution When replacing the main control board troubleshooted according to the troubleshooting flowcharts also adjust EEPROM data Copyright 1997 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 88: ...e OKIPAGE4w Chapter 6 Troubleshooting Procedures The OKIPAGE 4w malfunctions after the power supply has been turned on Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner ...

Page 89: ...Exchange BPX for any updates to this material http bpx okidata com ...

Page 90: ...Chapter 6 Troubleshooting Procedures JAM error Paper input jam Copyright 1997 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 91: ... Chapter 6 Troubleshooting Procedures JAM error Paper feed jam Copyright 1997 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 92: ...AGE4w Chapter 6 Troubleshooting Procedures Paper exit jam Copyright 1997 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 93: ...Page 64 Service Guide OKIPAGE4w Chapter 6 Troubleshooting Procedures Paper size error ...

Page 95: ...GE4w Chapter 6 Troubleshooting Procedures Fuser assy error Copyright 1997 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 96: ... Guide OKIPAGE4w Chapter 6 Troubleshooting Procedures Image Troubleshooting This section explains how to troubleshoot when an image problem occurs Figure 6 3 gives examples of image problems Figure 6 3 Image Problems ...

Page 98: ...r 6 Troubleshooting Procedures An image is light or blurred entirely Copyright 1997 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 99: ... Chapter 6 Troubleshooting Procedures Dark background density Copyright 1997 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 100: ...AGE4w Chapter 6 Troubleshooting Procedures Paper is blank Copyright 1997 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 101: ...eplace the image drum Charge roller 0 81 20 6 mm Replace the image drum Cleaning roller 0 81 20 6 mm Replace the image drum Transfer roller 1 71 43 4 mm Replace the image drum Heat roller 2 46 62 5 mm Replace the heat roller Pressure roller B 1 98 50 3 mm Replace pressure roller B Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX f...

Page 102: ...eplacing the image drum reset the drum counter Refer to Replacing the Drum Cartridge in Soft Manual or Product Information Guide Copyright 1997 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 103: ...PAGE4w Chapter 6 Troubleshooting Procedures Print voids Copyright 1997 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 104: ...PAGE4w Chapter 6 Troubleshooting Procedures Poor fusing Copyright 1997 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 105: ...Chapter 6 Troubleshooting Procedures Vertical white band stripe Copyright 1997 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 106: ...tents A Toner Supply Roller B Developing Roller C Charge Roller D Cleaning Roller E Transfer Roller F Heat Roller Copyright 1997 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 107: ...Page 76 Service Guide OKIPAGE4w Chapter 6 Troubleshooting Procedures Figure 6 5 Contents A Toner Supply Roller B Developing Roller C Charge Roller D Cleaning Roller E Ground Drum ...

Page 109: ...Page 77 Service Guide OKIPAGE4w Chapter 7 Wiring Diagram WIRING DIAGRAM 7 1 Interconnect Signal Diagram ...

Page 111: ...e Guide OKIPAGE4w Chapter 7 Wiring Diagram PCB Layout 1 Main Control Board HBMC 2 PCB Short Plag Plag Setting Content SP1 A External EPROM is valid SP1 B Mask ROM in the CPU is valid 2 High Voltage Power Supply Board ...

Page 113: ...Page 79 Service Guide OKIPAGE4w Chapter 8 Parts List Cover Assy Upper Figure 8 1 Cover Assy Upper Table 8 1 Cover Assy Upper ...

Page 115: ...Page 80 Service Guide OKIPAGE4w Chapter 8 Parts List Base Frame Unit Figure 8 2 Base Frame Unit Table 8 2 Base Frame Unit ...

Page 116: ......

Page 118: ...Page 81 Service Guide OKIPAGE4w Chapter 8 Parts List Base Plate Unit Table 8 Base Plate Unit ...

Page 120: ...OKIPAGE 4w to print data by itself Operation With the cover open turn on the AC switch and then close the cover The following patterns prints Copyright 1997 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 121: ...6 pin receptacle Type 57RE 40360 730B D29A Daiichi Denshi or equivalent Cable side 36 pin plug Type 57 30360 Daiichi Denshi or equivalent Copyright 1997 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 122: ...ength 6 feet 1 8 m max A Shielded cable composed of twisted pair wires is recommended for noise prevention Copyright 1997 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 123: ...Page 85 Service Guide OKIPAGE4w Chapter B Parallel Interface 3 Parallel I F signals Connector pin arrangement ...

Page 125: ... Parallel Interface 4 Signal level LOW 0 V to 0 8 V HIGH 2 4 V to 5 0 V Copyright 1997 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 126: ...rallel Interface 5 Interface circuit a Receiving circuit b Sending circuit Copyright 1997 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 127: ...ing timing compatible mode b INPUT PRIME timing when the INPUT PRIME signal is enabled c Data sending timing nibble mode Copyright 1997 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 128: ... 3 1 or higher The maintenance utility has the following functions Transmission of menu setting command to initialize and change setting values Printer RAM check Test printing Printer information display Printer EEPROM read write Copyright 1997 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 129: ...tions to perform printer maintenance functions For this reason only service and maintenance personnel can use the maintenance utility This utility cannot be made public for printer end users Copyright 1997 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 130: ...Counter Used to display and initialize the engine counter Printer Status Used to display the printer status Test Print Used to execute test printing Option Special function About Used to display engine maintenance utility information and printer information Reload Used to reload menu setting values Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Part...

Page 131: ... LED head dot count 4 LED Head Wire Used to specify whether the data wire of the LED head is one wire non adjustment type or two wire adjustment type This printer however can use only one wire type 5 Setting or Humidity Used to adjust transfer current 6 Entry Used to reflect the engine menu setting values on the printer 7 Cancel Used to clear unreflected items Items for which Entry is not specifie...

Page 132: ...nted image drum 2 Total Drum Count Total number of revolutions of image drum after shipment 3 Page Count Total number of printed pages after shipment Note Clicking the Reset button clears each counter 4 Reset All Used to clear all counters Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx o...

Page 133: ...94 Service Guide OKIPAGE4w Chapter C Maintenance Utility 4 8 Exit Clicking the Exit button terminates the maintenance utility Engine Maintenance Driver GUI Preliminary Figure C 1 Main Menu Dialog Preliminary ...

Page 134: ...Dialog Preliminary Figure C 3 About Dialog Preliminary Copyright 1997 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 135: ...ty 4 3 Printer Status Printer Status is used to display the printer status See Figure C 1 Copyright 1997 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 136: ... Print is used to check whether the printer can print data normally after the maintenance utility has terminated Copyright 1997 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 137: ... 2 EEPROM Upload Uploads EEPROM contents to the file 3 EEPROM Download Downloads data from the file to EEPROM 4 Printer RAM Check Checks printer RAM 5 User Sets a destination default ODA OEL INTL INTA See Figure C 2 Copyright 1997 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 138: ...gine maintenance utility version information Printer version information and memory size information Printer device ID information See figure C 3 Copyright 1997 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 139: ...aintenance Utility 4 7 Reload Reload is used to reload menu setting values Copyright 1997 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 ...

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