Oki C7200 Service Manual Download

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Service Guide - C7000 Series

Chapter 2 Operation

Page: 15

(4) Developing

- By the adhesion of toner to the latent electrostatic image on the drum surface, the image is changed to an image of its toner. The development

is processed at the contact portion between the OPC drum and the developing roller.

(1)

The sponge roller causes toner to adhere to the developing roller. The toner becomes negatively charged.

(2)

The developing blade removes excess toner from the developing roller and a thin layer

of toner remains and forms on the developing roller.

(3)

The toner is drawn by the latent electrostatic image at the contact portion between the

OPC drum and the developing roller. The latent electrostatic image on the drum surface is made visible with the toner.

Summary of Contents for C7200

Page 1: ...UAL This manual describes the procedures for the maintenance of the C7000 Series of printers The document is produced for maintenance personnel use For details on the procedures for handling the C7000...

Page 2: ...ning process 20 1 Paper Feed from Tray 21 2 Paper Feed from Multi Purpose Tray MT 22 3 Transport Belt 23 4 Driving and Up and Down Movements of I D Unit 24 5 Fuser Unit and Paper Ejection 25 6 Duplex...

Page 3: ...pring 56 3 3 9 Feed Roller and Nudger Roller 57 3 3 10 Rear Cover 58 3 3 11 Face Up Tray 59 3 3 12 Left Side Cover 60 3 3 13 Right Side Cover 61 3 3 14 Multi purpose Tray Assy Links 62 3 3 15 Drum Con...

Page 4: ...mode level 1 100 4 1 2 2 1 Entering self diagnosis mode level 1 101 4 1 2 2 2 Exiting self diagnosis mode 102 4 1 2 3 Switch scan test 103 4 1 2 4 Motor and clutch test 104 4 1 2 5 Test printing 105...

Page 5: ...Unit Error 140 6 Motor Fan Error 141 6 5 3 Troubleshooting image problems 142 1 Light or Faded Image on Whole Page or Color Misalignment on Whole Page Figure 6 2 A 143 2 Dirty Background Figure 6 2 B...

Page 6: ...ray Guide Figure 8 4 164 Paper Tray Guide Table 8 4 165 Duplex Unit Figure 8 5 166 Duplex Unit Table 8 5 167 Centronics Parallel Interface 168 B 2nd 3rd Tray Maintenance 1 Parts Replacement 169 1 1 Co...

Page 7: ...e document efforts have been made to ensure that the information in it is accurate However there may be errors in the document Oki l Data assumes no responsibility for any damage resulting from or cla...

Page 8: ...Service Guide C7000 Series Chapter 1 Specifications Page 2 1 1 System Configuration Figure 1 1 shows the system configuration of the C7000 Series of printers...

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Page 11: ...rinter Configuration The inside of the printer is composed of the following Electrophotographic Processor l Paper Paths l Controller Block CU and PU l Operator Panel l Power Units High Voltage Unit an...

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Page 14: ...ide C7000 Series Chapter 1 Specifications Page 4 1 3 Option Configuration The following options are available for the C7000 Series of printers 1 2nd Tray 3rd Tray 2 Duplex Unit 3 Expansion Memory 64 1...

Page 16: ...m 2 Front feeder 55 kg to 140 kg 64 to 163g m 2 4 Print Speed Color 12 pages per minute Transparency 5 pages per minute Monochrome 20 pages per minute Transparency 12 pages per minute Postal Card Labe...

Page 17: ...lity 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 with drum and without toner Delivery 1 month max 20...

Page 18: ...00 Series of printers tandem color electrophotographic page printers adopt technologies such as an LED array OPC dry single component non magnetic developing roller transfer and heat compression fusin...

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Page 21: ...Service Guide C7000 Series Chapter 2 Operation Page 7 2 1 Main board CRM PWB Figure 2 2 provides the block diagram of the main control board CRM PWB...

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Page 23: ...red Number of chips contained 8 or 16 5 EEPROM EEPROM an 8 pin DIP package is to be inserted into the IC socket The EEPROM is of 16 Kbits for 3 3V power supply and settings for controlling the control...

Page 25: ...Service Guide C7000 Series Chapter 2 Operation Page 8 2 2 Engine Controller Board K71 PWB...

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Page 27: ...ler engine video interfacing LED interfacing motor control sensor input video memory control main scan color misalignment correction skew correction and high voltage power supply control 3 Flash ROM T...

Page 28: ...V Motor drive voltage and power supply voltage for high voltage power supply 12 V OP Amp High voltage power supply 2 High voltage power supply circuit This circuit generates the following voltages of...

Page 29: ...Service Guide C7000 Series Chapter 2 Operation Page 10 2 4 Mechanical Processes Figure 2 4 shows the mechanical processes of the C7000 Series of printers...

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Page 32: ...ge 11 2 4 1 Electrphotographic process 1 Electrophotographic processes 2 Charging 3 Exposure 4 Developing 5 Transfer 6 Fusing 7 Cleaning waste toner area 8 Cleaning transfer belt Copyright 1999 Okidat...

Page 33: ...ed on the surface potentials a latent electrostatic image is formed on the drum surface 3 Development Negatively charged toner contacts the OPC drum and by electrostatic force adheres to the latent el...

Page 34: ...Series Chapter 2 Operation Page 13 2 Charging 2 Charging Negative DC voltage is applied to the charging roller contacting the surface of the OPC drum Copyright 1999 Okidata Division of OKI America Inc...

Page 35: ...iated with light from the LED head The negative charge of the radiated portions of the drum surface attenuates in response to the intensity of the light and a latent electrostatic image responsive to...

Page 36: ...nge roller causes toner to adhere to the developing roller The toner becomes negatively charged 2 The developing blade removes excess toner from the developing roller and a thin layer of toner remains...

Page 37: ...drum surface and positively opposite to the charge of the toner charged by the transfer roller on its back Applying positive high voltage from the power supply to the transfer roller moves the positiv...

Page 38: ...roller The fusing temperature is controlled by the sum of the temperature detected by the thermistor moving over the heat roller surface and the temperature detected by the thermistor moving over the...

Page 39: ...18 7 Cleaning waste toner area 7 Cleaning Non fused residual toner on the OPC drum is scraped with the cleaning blade and collected in the waste toner area of the toner cartridge Copyright 1999 Okida...

Page 40: ...age 19 8 Cleaning transfer belt 8 Cleaning Residual toner on the transfer belt is scraped with the cleaning blade and collected in the waste toner box of the transfer belt unit Copyright 1999 Okidata...

Page 41: ...Service Guide C7000 Series Chapter 2 Operation Page 20 2 4 2 Paper running process Figure 2 5 shows the traveling of paper in the C7000 Series of printers...

Page 43: ...r stops 3 The running of the registration motor in the arrow direction b which synchronizes with the above paper advance operation drives the registration roller Assy B and the electromagnetic clutch...

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Page 46: ...on roller Assy B does not move because its one way clutch gear 1 idles 3 After the paper beginning turns the entrance sensor on the paper is forwarded a fixed length The paper stops when its beginning...

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Page 49: ...belt unit sits with one transport roller immediately below each color s drum and the transport belt between them By the application of a fixed voltage the transport belt and the transport roller feed...

Page 50: ...way gear idles upon placement of the lever in its lowest position 2 With the running of the main motor in the arrow direction b the lever 1 pushes up the I D unit via the lever 2 After the up down se...

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Page 54: ...to paper by heat and pressure 2 At the same time the four eject rollers move to eject the paper 3 The ejection path is switched back and forth between the route to the face up stacker and the route to...

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Page 57: ...ath is switched to that to the duplex unit At this time as the roller 1 turns in the direction of the arrow a the paper is retracted on the rear of the cassette 2 When fixed time has elapsed after the...

Page 59: ...Service Guide C7000 Series Chapter 2 Operation Page 27 2 5 Sensor 2 5 1 Paper related sensors 2 5 2 Other sensors Copyright 1999 Okidata Division of OKI America Inc All rights reserved...

Page 60: ...ng for switching from hopping to transport ON paper is present OFF Paper is absent Entrance Belt sensor Detects the beginning of transported paper and based on the time taken until the paper beginning...

Page 61: ...tects the beginning of reverses paper in the duplex unit ON paper is present OFF Paper is absent Duplex Front sensor Detects the end of reversed paper in the duplex unit to determine the paper ejectio...

Page 62: ...sensor detects the size of paper in the paper cassette 6 ID Up Down sensor one for each of colors Y M C and K This sensor checks whether the ID unit is in the up position or in the down position 7 Ton...

Page 63: ...tion of color misalignment this sensor reads the alignment pattern printed at the right and left ends of the transfer belt see section 2 13 Copyright 1999 Okidata Division of OKI America Inc All right...

Page 64: ...head 2 Color misalignment in slanting direction Positional error caused by LED head 3 Color misalignment in Y axis direction Positional error caused by I D unit and LED head 2 Correcting A preset pat...

Page 65: ...of printers measure the room temperature and the relative humidity using their room temperature sensors and humidity sensors An optimum transfer voltage under each measurement environment is calculat...

Page 66: ...1 0 Duplex Paper Reversing Jam The duplex rear sensor has not turned on during the paper reversing operation of the duplex unit STSOP 5 OPJAM 5 Duplex Unit Entrance Paper Jam The duplex in sensor has...

Page 68: ...voltage power and output of not less than 32V At the same time the CPU receives CVOPN signals for indicating the status of the microswitch to handle the cover open When the front cover is open the mic...

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Page 71: ...in synchronization with the protrusion of the stirring gear Detection l A toner low condition is detected by measuring the contact time between the sensor lever magnet and the stirring bar Full Toner...

Page 72: ...ighest position then falls to its lowest position under its own weight because of the absence of toner resistance on the opposite side In this situation the bar magnet contact time becomes long By mea...

Page 73: ...oner low had been detected When the toner full condition is detected 10 consecutive times toner low is removed l When the toner sensor remains unchanged for more than 15 cycles of 2 3 seconds the tone...

Page 74: ...e set position of the paper guide Upon installation of the paper cassette the microswitch detects the condition of the tab pieces and the paper size is recognized STATE OF MICROSWITCHES SW1 SW2 SW3 SW...

Page 75: ...error b The order of mounted RAMs is checked Out of standard order is judged as an error c Each slot s RAM is checked by read after write operation 4 EEPROM check Specific data stored at a fixed addr...

Page 76: ...lade which is at the back of the belt unit The color misalignment detection pattern is printed on the belt at each of the right and left ends and by reading the patterns by the reflection type optical...

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Page 79: ...er it is new or previous according to whether the fuse in it is conducting or out of conduction When the fuse is conducting the unit is decided that it is new The new or previous judgment is performed...

Page 80: ...Toner Cartridge The number of dots printed is counted The used amount is determined based on the counter value See section 2 16 End of Life Time when toner low occurs Do not use the unit anymore Belt...

Page 81: ...inted The counting starts after toner low is removed The sum of the counted values is stored in EEPROM Upon detection of toner low the amount used is forcedly set to 8 After that when the equivalent o...

Page 82: ...scribes the procedure for replacing the parts assemblies and units in the field The replacing procedure is given for detachment To attach use the reverse procedure 3 1 Precautions in Replacing Parts 3...

Page 83: ...rface 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 I the power switch of t...

Page 84: ...the equipment or floor No Service Tools Tools Qty Place of Use Remarks 1 No 1 100 Philips screwdriver 1 2 2 5 mm screws 2 No 2 200 Philips screwdriver Magnetized 1 3 5 mm screws 3 No 3 100 screwdriver...

Page 85: ...Service Guide C7000 Series Chapter 3 Disassembly Page 43 3 2 Parts Layout...

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Page 88: ...Service Guide C7000 Series Chapter 3 Disassembly Page 44 Top Cover Assy...

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Page 91: ...Service Guide C7000 Series Chapter 3 Disassembly Page 45 Printer Unit Printer Unit 1 2...

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Page 93: ...Printer Unit 2 2...

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Page 96: ...Service Guide C7000 Series Chapter 3 Disassembly Page 46 Cassette Guide Assy L R...

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Page 99: ...Service Guide C7000 Series Chapter 3 Disassembly Page 47 Duplex Unit...

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Page 102: ...r handle Top cover Latch Top Cover Latch Spring 3 3 6 Eject Guide Assy 3 3 7 Cassette Assy Front Cover Assy Front Cover Inner Battle 3 3 8 Retard Pad Assy Retard Pad Assy Spring 3 3 9 Feed Roller and...

Page 103: ...or Actuator and Entrance Belt Sensor Actuator 3 3 28 Fuser Exit Roller 3 3 29 Exit Sensor Assy 3 3 30 Fuser Latching Handle L 3 3 31 Belt Motor Assy 3 3 32 Fuser Latching Handle R 3 3 33 Main Motor As...

Page 105: ...de C7000 Series Chapter 3 Disassembly Page 49 3 3 1 Top Cover 1 Open the Top Cover assy 2 Remove the nine screws 1 to detach the top cover 2 Copyright 1999 Okidata Division of OKI America Inc All righ...

Page 106: ...1 Open the top cover 1 2 Remove the three cables and unhook the LED Assy 2 at two places to demount it the two springs 3 become detached together with the LED Assy 2 3 Remove the LED connector 4 When...

Page 108: ...3 3 1 2 Remove the rear cover see section 3 3 10 3 Remove the left side cover see section 3 3 12 4 Remove the right side cover see section 3 3 13 5 Remove the shield plates A and B see section 3 3 22...

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Page 111: ...demount the control panel Assy 2 3 Detach the control panel tape harness 14 4 Remove the top cover unit see section 3 3 3 5 Unscrew the four screws 3 to remove the earth plate 4 6 Remove the two scre...

Page 113: ...assembly Page 53 3 3 5 Top Cover Handle Top Cover Latch Top Cover Latch Spring 1 Remove the two screws 1 to detach the top cover handle 2 and disengage the top cover latch 3 at the same time the two t...

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Page 116: ...Service Guide C7000 Series Chapter 3 Disassembly Page 54 3 3 6 Eject Guide Assy 1 Remove the five screws 1 to detach the eject guide assy 2...

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Page 119: ...hapter 3 Disassembly Page 55 3 3 7 Cassette Assy Front Cover Assy Front Cover Inner Baffle 1 Detach the cassette assy 1 2 Open the front cover 2 and disengage it at two places to detach it 3 Detach th...

Page 121: ...rvice Guide C7000 Series Chapter 3 Disassembly Page 56 3 3 8 Retard Pad Assy Retard Pad Assy Spring 1 Remove the cassette 1 2 Detach the retard pad assy 2 at the same time the spring 3 becomes detache...

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Page 124: ...Service Guide C7000 Series Chapter 3 Disassembly Page 57 3 3 9 Feed Roller and Nudger Roller 1 Remove the cassette 1 2 Unlatch and demount the feed roller 1 3 Unlatch and demount the nudger roller 2...

Page 126: ...ver 1 Remove the left side cover see section 3 3 12 2 Remove the four screws 2 to detach the rear cover 1 Note When attaching the rear cover take care not to allow the spring 3 to get caught in parts...

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Page 128: ...Service Guide C7000 Series Chapter 3 Disassembly Page 59 3 3 11 Face Up Tray 1 Open the face up tray 1 in the arrow direction and disengage it at two places to detach it...

Page 130: ...ice Guide C7000 Series Chapter 3 Disassembly Page 60 3 3 12 Left Side Cover 1 Open the top cover 1 2 Open the front cover 2 and undo the screw 3 3 Remove the four screws 4 to detach the left side cove...

Page 132: ...ce Guide C7000 Series Chapter 3 Disassembly Page 61 3 3 13 Right Side Cover 1 Open the top cover 1 2 Open the front cover 2 and undo the screw 3 3 Remove the four screws 4 to detach the right side cov...

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Page 135: ...move the right side cover see section 3 3 13 3 Remove the left plate Assy see section 3 3 22 4 Remove the three screws 1 to detach the multipurpose tray top cover 2 5 Remove the three screws 3 two of...

Page 137: ...rvice Guide C7000 Series Chapter 3 Disassembly Page 63 3 3 15 Drum Contact Assys 1 Insert a flatblade screwdriver between the printer case and the drum contact assy 1 to demount the drum contact assy...

Page 139: ...tration Drive Gear A 1 Remove the left side cover see section 3 3 12 2 Remove the right side cover see section 3 3 13 3 Remove the multipurpose tray see section 3 3 14 4 Remove the four screws 1 to de...

Page 141: ...1 Remove the cassette Assy 2 Open the front cover 3 Remove the right side cover see section 3 3 13 4 Remove the left plate Assy see section 3 3 22 5 Remove the registration clutch see section 3 3 18...

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Page 144: ...Motor Assy 1 Remove the left side cover see section 3 3 12 2 Remove the left plate Assy see section 3 3 22 3 Remove the connector and the E ring 1 then remove the two screws 3 the earth 4 and the regi...

Page 146: ...uide C7000 Series Chapter 3 Disassembly Page 67 3 3 19 Main Cooling Fan 1 Unhook the connector 1 and remove the screw 2 and the cooling fan 3 Note When attaching the cooling fan observe its correct or...

Page 148: ...ide C7000 Series Chapter 3 Disassembly Page 68 3 3 20 Color Registration Sensor Assy 1 Remove the two screws 1 and the two connectors to demount the color registration sensor assy 2 2 Remove the earth...

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Page 151: ...Service Guide C7000 Series Chapter 3 Disassembly Page 69 3 3 21 Duplex Guide Assy 1 Unlatch and demount the duplex guide 1...

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Page 154: ...Fan 1 Unscrew the screws 1 to remove the plate A 2 2 Unscrew the screws 3 to remove the shield plate B 4 3 Remove the printer engine controller PWB see section 3 3 30 4 Unscrew the screws 5 to remove...

Page 156: ...Controller PWB 1 Remove the right side cover see section 3 3 13 2 Remove the left plate Assy see section 3 3 22 3 Remove the five screws 1 and all the connectors to demount the printer engine controll...

Page 157: ...ew the two screws 1 and remove the AC inlet 2 2 Unscrew the four black screws 3 and five screws 4 to detach the printer unit chassis 5 3 Unscrew the four black screws 6 and remove the left top cover s...

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Page 160: ...isassembly Page 73 3 3 25 Entrance Cassette Sensor Actuator 1 Remove the printer unit chassis see section 3 3 24 2 Turn over the main chassis 3 Remove the two clamps with needlenose pliers to detach t...

Page 162: ...isassembly Page 74 3 3 26 Entrance Sensor PWB 1 Remove the registration roller assb B see section 3 3 17 2 Remove the two screws 10 to detach the entrance sensor PWB 2 Copyright 1999 Okidata Division...

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Page 164: ...embly Page 75 3 3 27 Entrance MT Sensor Actuator and Entrance Belt Sensor Actuator 1 Remove the entrance sensor PWB R71 see section 3 3 26 2 Unlatch and detach the entrance MT sensor actuator 1 3 Unla...

Page 166: ...Assy 2 2 Unscrew the screw 3 to remove the fuser exit roller contact 4 3 Remove the fuser drive gear A 5 and fuser drive gear A 6 4 Unscrew the screw 7 to remove the fuser drive gear C 8 5 Unlatch an...

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Page 169: ...e Guide C7000 Series Chapter 3 Disassembly Page 77 3 3 29 Exit Sensor Assy 1 Remove the fuser exit roller see section 3 3 28 2 Remove the screw 1 and connector to detach the red and blue exit sensor a...

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Page 172: ...Service Guide C7000 Series Chapter 3 Disassembly Page 78 3 3 30 Fuser Latching Handle L 1 Remove the latching handle spring 1 2 Unscrew the screw 2 to detach the fuser latching handle L 3...

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Page 175: ...e C7000 Series Chapter 3 Disassembly Page 79 3 3 31 Belt Motor Assy 1 Remove the fuser latching handle R see section 3 3 32 2 Remove the two screws 1 to detach the two connectors 2 3 Detach the belt m...

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Page 178: ...ies Chapter 3 Disassembly Page 80 3 3 32 Fuser Latching Handle R 1 Remove the printer unit chassis see section 3 3 24 2 Remove the E ring 1 3 Remove the fuser latching handle spring 2 to detach the fu...

Page 180: ...Guide C7000 Series Chapter 3 Disassembly Page 81 3 3 33 Main Motor Assy 1 Remove the belt motor assy see section 3 3 31 2 Remove all the connectors 3 Remove the four screws 1 to detach the main motor...

Page 182: ...sassembly Page 82 3 3 34 Main Feeder Drive Motor 1 Remove the two screws 1 to detach the main feeder drive motor 2 2 Unscrew the screw 3 to remove the main feeder drive motor bracket 4 3 Remove the ma...

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Page 185: ...Chapter 3 Disassembly Page 83 3 3 35 Contact Assy Left Plate Assy 1 Remove the printer unit chassis see section 3 3 24 2 Remove the four screws 1 to detach the left plate Assy 2 3 Remove the screw 3 t...

Page 187: ...sembly Page 84 3 3 36 Low Voltage Power Supply 1 Remove the printer unit chassis see section 3 3 24 2 Unhook the connector 1 3 Unscrew the screw 2 to remove the earth cable 3 4 Unscrew the six screws...

Page 189: ...sembly Page 85 3 3 37 High Voltage Power Supply 1 Remove the contact Assy see section 3 3 35 2 Unhook the connector of the high voltage power supply 2 3 Remove the two screws 1 to detach the high volt...

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Page 192: ...ter unit chassis see section 3 3 24 2 Remove the low voltage power supply and high voltage power supply see sections 3 3 36 and 3 3 37 3 Unscrew the five screws 1 to remove the lower plate 2 4 Unscrew...

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Page 195: ...eed Assy see section 3 3 38 3 Remove the three screws 1 to detach the left cassette guide Assy 2 At the same time the earth plate 3 becomes detached 4 Remove the cassette lift spring 4 then remove the...

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Page 198: ...etached 4 Remove the cassette lift spring 4 then detach the plastic slide 5 the cassette lift arm L 6 and the plastic roller 7 5 Unscrew the screw 8 to remove the paper size actuator 9 6 Unscrew the s...

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Page 201: ...er 3 Disassembly Page 89 3 3 41 Fuser Unit 1 Open the top cover 1 2 Push the right and left fuser levers blue 2 in the arrow direction to detach the fuser unit 3 Copyright 1999 Okidata Division of OKI...

Page 202: ...Guide C7000 Series Chapter 3 Disassembly Page 90 3 3 42 Belt Unit 1 Open the top cover 1 2 Remove the I D unit 3 Push the lever blue 2 in the arrow direction raise the handle blue and detach the belt...

Page 204: ...3 3 43 Duplex Unit 1 Remove the cassette Assy the front cover Assy and the front cover inner baffle 2 Unlatch the rear at the right and left and pull the duplex unit 1 toward the front Copyright 1999...

Page 205: ...ter 3 Disassembly Page 92 3 3 44 Guide Rails L and R 1 Remove the duplex unit see section 3 3 43 2 Remove the six screws 1 to detach the guide rails L 2 and R 3 Copyright 1999 Okidata Division of OKI...

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Page 207: ...etach the roller 19 13 Unscrew the screw 20 to remove the earth 21 14 Detach the gear 22 and bush 23 At the same time the mini pitch belt 24 becomes detached 15 Detach the gear 25 and bush 26 then det...

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Page 210: ...y Page 94 3 3 46 CU Assy 1 Pulling out Controller Board 1 Undo the two screws 1 2 Pull the controller board 2 out 3 Place the controller board 2 on a flat table 2 Detaching Fan 1 Remove the connector...

Page 211: ...3 Removing the CRM Board...

Page 212: ...ve the fan bracket 7 2 Unscrew the four screws 8 to remove the plate support 9 and the guide rail A 10 3 Unscrew the two screws 11 to remove the guide rail 11 4 Unscrew the two screws 12 and three scr...

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Page 215: ...on the C7000 Series of printers are made by key entry on the operator panel In addition to a standard menu there is a maintenance menu in each printer Select the one that serves the purpose of intend...

Page 216: ...s Chapter 4 Adjustments Page 96 4 1 Maintenance Modes and Their Functions 4 1 1 Maintenance Menu 4 1 2 Engine Maintenance Menu 4 1 3 CRM Board Adjustments Copyright 1999 Okidata Division of OKI Americ...

Page 217: ...increase the value Normal Paper Color Setting 0 1 2 2 1 Implements fine adjustment of COLOR printing on normal paper when unclear characters or spots are often found on the print result With disperse...

Page 219: ...atively special knowledge Working with the level 3 including process parameter setting takes expertise and the level contains PU individual experimental elements Basically do not use items other than...

Page 220: ...Chapter 4 Adjustments Page 99 4 1 2 1 Operator panel Operational descriptions about the self diagnosis are premised on the following operator panel layout Copyright 1999 Okidata Division of OKI Ameri...

Page 221: ...iagnosis mode Switch Scan Test l LED Head Test l Motor and Clutch Tests l Test Pattern Execution l NVM Initialization l Consumable Counter Display l Consumable Counter Display Continuous l 4 1 2 2 1 E...

Page 222: ...11 and 4 44 44 keys down at the same time turn the power on to enter this mode 3 ENGINE DIAG MODE XX XX appears in the upper display XX XX shows the version of ROM 4 Go to each self diagnosis step by...

Page 223: ...ustments Page 102 4 1 2 2 2 Exiting self diagnosis mode 1 While ENGINE DIAG MODE XX XX is displayed press the 0 key or turn the power off and after ten seconds on again Copyright 1999 Okidata Division...

Page 224: ...to be tested shows up on the upper display the 2 key increments a test item and the 6 key decrements a test item 3 In response to the press of the 3 key the test starts the SWITCH SCAN number begins b...

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Page 228: ...ks then the corresponding unit is driven for 10 seconds refer to Figure 4 3 Note The view of step 2 is restored after 10 second driving and with the press of the corresponding switch again the unit is...

Page 229: ...nit REMOVE ID YELLOW ID MOTOR MAGENTA ID Remove all the IDs B Y M and C to drive the unit REMOVE ID MOTOR Remove all the IDs B Y M and C to drive the unit REMOVE ID CYAN ID MOTOR Remove all the IDs B...

Page 230: ...H OPTION CASSETTE 2 MOTOR OPTION Remove the cassette 2 to drive the unit EXIT TRAY2 CASSETTE CASSETTE2 FEED ROLLER OPTION CASSETTE3 FEEDER MOTOR OPTION Remove the cassette 3 to drive the unit EXIT TRA...

Page 231: ...press of the 3 7 the setting item and its setting are displayed on the upper and lower parts respectively Pressing the 3 key increments a setting Pressing the 7 key decrements a setting The last disp...

Page 232: ...eater Temperature Measurement Set Value in units of C L Lower Heater Temperature Measurement Set Value in units of C T Environmental Temperature Measurement in units of C H Environmental Humidity Meas...

Page 233: ...ny alarm listed under the Detail column in the table specified below is found the corresponding alarm message appears on the operator panel and test printing is suspended For error details see Sec 4 1...

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Page 236: ...5 Steps 2 through 4 to be repeated on an as needed basis 6 Touch the 4 key to end the test the display is restored to step 1 Copyright 1999 Okidata Division of OKI America Inc All rights reserved...

Page 237: ...IAL starts blinking upon pressing the 3 key and all the items in Table 4 3 are initialized by holding the key down for 10 seconds 4 Press the 4 key to end the test the display of step 1 is restored In...

Page 238: ...value for the LED head Yellow Magenta Cyan 0 1 1200 inch Registration Set Point y axis Right Yellow LED Magenta LED Cyan LED Initializes the Y axis right correction value for the LED head Yellow Mage...

Page 239: ...etail Fuser Unit FUSER UNIT IMAGES DEC Image Shows the number of sheets fed after the installation of a new fuser unit to date Belt Unit TR BELT UNIT IMAGES DEC Image Shows the number of sheets fed af...

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Page 241: ...e life cycle consumption status of the consumables shows up item by item the press of the 3 and 7 keys is invalid 3 Pressing the 4 key ends the test flips back to the display of 1 Item Upper Display L...

Page 242: ...M UNIT FUSE CUT ERROR Cyan ID unit fuse cut error CYAN TONER SENSOR ERROR Cyan toner sensor error CYAN LED HEAD ERROR Cyan LED head error CYAN IRREGULAR ERROR Cyan detected value error CYAN REGISTRATI...

Page 243: ...lex unit hopping error HOPPING ERROR TRAY4 PX703 Tray4 hopping error HOPPING ERROR TRAY5 PX703 Tray5 hopping error INPATH FEED Feed jam INPATH TRANSPORT Transport jam INPATH EXIT Exit jam INPATH DUPLE...

Page 244: ...t error MAGENTA TONER SENSOR ERROR Magenta toner sensor error MAGENTA LED HEAD ERROR Magenta LED head error MAGENTA IRREGULAR ERROR Magenta detected value error MAGENTA REGISTRATION OUT LEFT Magenta o...

Page 245: ...er heater thermistor open circuit error UPPER HEATER SHORT ERROR Upper heater thermistor short circuit error WARMING UP Warming up WDT ERROR Watchdog timer timeout error YELLOW DRUM UP DOWN ERROR Yell...

Page 246: ...eeder hopping error INFEED DUPLEX Duplex unit hopping error INFEED TRAY4 PX703 Tray4 hopping error INFEED TRAY5 PX703 Tray5 hopping error INPATH Information of paper that stays on the paper path INFEE...

Page 247: ...OEM OEM Remark LETTER inch A4 millimeter A4 A4 millimeter A4 millimeter Model Name Setting The CU program automatically determines and switches between following printer specifications LED head width...

Page 248: ...ignals 1 2 Short Disconnects WE signals 2 3 Short Connects WE signals Factory 2 3 Short Setting Re programmable flash ROM DIMM Short Plug DIMM2 Configures the banks of the ROM DIMM slot B 1 2 Short Fo...

Page 249: ...DD 0 0 3 1 3 Font List Printing PCL A list of PCL fonts is printed Operation Press of Switches Without HDD 0 3 1 1 3 With HDD 0 0 3 1 1 3 Font List Printing PS A list of PS fonts is printed Operation...

Page 251: ...Y M C K Color balance adjustment Fuser Unit Not required Belt Cassette Assy Not required PU K71 Bord Re mounting the EEPROM used prior to the replacement Note CU CRM Board Re mounting the EEPROM used...

Page 252: ...ove the EEPROM from the board and mount it on a new board for errors other than those of engine EEPROM When the SERVICE CALL XX an engine EEPROM error message is displayed on the operator panel the EE...

Page 253: ...MODE is being displayed use the 3 and 7 keys to select a setting value 7 Select SHIPPING MODE fuse cut enabled press the 3 and 7 keys in combination Then the mode name stops blinking and the set value...

Page 254: ...n Impressions Magenta Impressions Yellow Impressions Total number of Pages Printed The number of pages printed after the installation of a new ID unit Copyright 1999 Okidata Division of OKI America In...

Page 255: ...on a newly installed board to allow a new board to inherit user defined settings and font installation information When the user s EEPROM is unusable due to its problem use the new one on the new boar...

Page 256: ...SET 6 Choose the number of the color closest to the part on the test pattern If the selected color is 00 the color balance is correct and no adjustment is required If it is not 00 the color balance sh...

Page 258: ...pter 5 Period Maintenance Page 118 5 0 Periodic Maintenance 5 1 Parts Replaced Periodically 5 2 Cleaning 5 3 Cleaning LED Lens Array 5 4 Cleaning Pickup Roller Copyright 1999 Okidata Division of OKI A...

Page 259: ...tment after Replacement Toner Cartridge Time when TONER LOW is displayed 10 000 pages are printed None I D Unit ID Time when CHANGE XXX DRUM is displayed 20 000 pages are printed 3 pages per job Perfo...

Page 260: ...an the inside and outside of the printer with waste and a small vacuum cleaner hand cleaner as the case may be Caution Do not touch the terminals of the image drums the LED lens array and the LED head...

Page 261: ...oice light areas run the length of a printed page clean the LED lens array Caution Be sure to use the LED head cleaner to clean the LED lens array The LED head cleaner is packed together with the tone...

Page 262: ...tenance Page 122 5 4 Cleaning Pickup Roller When lines run the length of a printed paper clean the pick up roller Caution Use a soft cloth so as not to damage the roller surface Copyright 1999 Okidata...

Page 263: ...ubleshooting 1 Check the basic check items covered in the user s manual 2 Obtain as much information about problems from users as you can 3 Perform inspections in conditions close to those in which pr...

Page 264: ...Problems 1 Is the printer s operating environment correct 2 Have the consumables toner drum cartridges been properly replaced 3 Is the correct media being used Refer to the media specification 4 Are t...

Page 265: ...the surface of the OPC drum with hands or allow foreign matter to contact it 2 Do not expose the OPC drum to direct sunlight 3 Do not touch the fuser unit with hands as it is hot 4 Do not expose the...

Page 266: ...Troubleshooting 1 Control panel display The failure status of the printer is provided on the LCD liquid crystal display of the operator panel Take appropriate corrective actions according to messages...

Page 267: ...6 Troubleshooting Procedures Page 127 6 5 Troubleshooting When problems occur in the printer troubleshoot them using the following procedure 6 5 1 LCD messages list Copyright 1999 Okidata Division of...

Page 268: ...rror message Service Call nnn Error Note nnn is an error code While a service call appears an error code accompanied by its error information is shown on the lower LCD Error codes their meanings and a...

Page 269: ...recover from the error by replacing the RAMM DIMM No Yes No Reinstall the concerned RAM DIMM Replace the RAM DIMM Replace the CRM board The EEPROM needs replacement Service Call 031 Error CU Slot2 DI...

Page 270: ...error by replacing the RAMM DIMM No No Yes No Use a genuine RAM DIMM Reinstall the concerned RAM DIMM Replace the RAM DIMM Replace the CRM board The EEPROM needs replacement Service Call 037 Error Sl...

Page 271: ...EPROM needs replacement Service Call 070 Error CANT_HAPPEN PS F W Problem Detection Is it recovered by turning the printer off on No Replace the CRM board The EEPROM needs replacement Service Call 072...

Page 272: ...ntrol board 71K Service Call 120 Error 122 Error Error detected at the Power unit cooling fan in the Controller cavity 1 Is the error message displayed 2 Does the error repeat Yes Yes Turn off on the...

Page 273: ...ubleshooting according to messages on the LCD No Failure Flowchart Number 1 Printer Malfunction after Turn on 1 2 JAM Error Loading Jam 1st tray Paper Loading Jam Multi purpose Tray Paper Feed Jam Pap...

Page 275: ...Service Guide C7000 Series Chapter 6 Troubleshooting Procedures Page 131 1 The printer does not operate properly after power on...

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Page 278: ...roubleshooting Procedures Page 132 2 Jams 2 1 Paper Loading Jam 1st Tray 2 2 Paper Loading Jam Multi Purpose Tray 2 3 Paper feed jam 2 4 Paper exit jam 2 5 Duplex Jam Copyright 1999 Okidata Division o...

Page 279: ...Service Guide C7000 Series Chapter 6 Troubleshooting Procedures Page 133 2 1 Paper Loading Jam 1st Tray...

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Page 282: ...Service Guide C7000 Series Chapter 6 Troubleshooting Procedures Page 134 2 2 Paper Loading Jam Multi Purpose Tray...

Page 284: ...Service Guide C7000 Series Chapter 6 Troubleshooting Procedures Page 135 2 3 Paper feed jam...

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Page 287: ...Service Guide C7000 Series Chapter 6 Troubleshooting Procedures Page 136 2 4 Paper Exit Jam...

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Page 290: ...Service Guide C7000 Series Chapter 6 Troubleshooting Procedures Page 137 2 5 Duplex Jam...

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Page 293: ...Service Guide C7000 Series Chapter 6 Troubleshooting Procedures Page 138 3 Paper Size Error...

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Page 296: ...Service Guide C7000 Series Chapter 6 Troubleshooting Procedures Page 139 4 Image Drum Unit ID Up and Down Operation Error Copyright 1999 Okidata Division of OKI America Inc All rights reserved...

Page 297: ...Service Guide C7000 Series Chapter 6 Troubleshooting Procedures Page 140 5 Fusing Unit Error...

Page 300: ...ge Figure 6 2 A 1 Dirty background Figure 6 2 B 2 Blank page Figure 6 2 C 3 Vertical belt or line black or color belt or black or color line Figure 6 2 D 4 Vertical white belt or line or uneven color...

Page 302: ...Service Guide C7000 Series Chapter 6 Troubleshooting Procedures Page 143 1 Light or Faded Image on Whole Page or Color Misalignment on Whole Page Figure 6 2 A...

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Page 305: ...Service Guide C7000 Series Chapter 6 Troubleshooting Procedures Page 144 2 Dirty Background Figure 6 2 B...

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Page 308: ...Service Guide C7000 Series Chapter 6 Troubleshooting Procedures Page 145 3 Blank Page Figure 6 2 C...

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Page 311: ...e C7000 Series Chapter 6 Troubleshooting Procedures Page 146 4 Vertical Belt or LIne Black or Color Belt or Black or Color Line Figure 6 2 D Copyright 1999 Okidata Division of OKI America Inc All righ...

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Page 313: ...Service Guide C7000 Series Chapter 6 Troubleshooting Procedures Page 147 5 Vertical White Belt or Line or Uneven Color Belt or Line Figure 6 2 F...

Page 315: ...Service Guide C7000 Series Chapter 6 Troubleshooting Procedures Page 148 6 Poor Fusing Ink spreads or peels when touched with fingers...

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Page 318: ...hes Toner Supply Roller Replace the image drum unit 1 732 inches Charging Roller Replace the image drum unit 4 453 inches Fuser Upper Roller Replace the fuser unit 4 453 inches Fuser Lower Roller Repl...

Page 319: ...Service Guide C7000 Series Chapter 6 Troubleshooting Procedures Page 150 8 Missing Image...

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Page 322: ...Service Guide C7000 Series Chapter 6 Troubleshooting Procedures Page 151 9 Color Misalignment...

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Page 327: ...Service Guide C7000 Series Chapter 6 Troubleshooting Procedures Page 152 10 Color Different from Original One...

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Page 331: ...Service Guide C7000 Series Chapter 7 Wiring Diagram Page 154 7 1 Resistance Check...

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Page 337: ...Service Guide C7000 Series Chapter 7 Wiring Diagram Page 155 7 2 Program Font ROM Location 1 Printer Engine Controller PWB 71K PWB...

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Page 339: ...2 Main Controller PWB...

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Page 341: ...Ms must be inserted in descending order of the parenthesized type No appeared on the label of each DIMM into the slots 1 3 2 and 4 see the user documentation for details 3 LED Control PWB Y71 PWB 4 Du...

Page 342: ...5 Control Panel PWB X71 PWB 6 N71 PWB 7 Entrance Sensor PWB R71 PWB...

Page 344: ...Service Guide C7000 Series Chapter 8 Parts List Page 156 Main Assembly Figure 8 2...

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Page 346: ...Figure 8 1 1 3...

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Page 349: ...1 11 40866301 Multi Purpose Tray Cover Assy 1 12 41045801 Link 2 13 40325101 Multi Purpose Tray Drive Gear 1 14 40952701 Multi Purpose Tray Top Cover 1 15 16 17 18 41256204 Print Engine Controller PW...

Page 351: ...Qty Remarks 32 41304105 Image Drum Yellow 1 41304106 Image Drum Magenta 1 41304107 Image Drum Cyan 1 41304108 Image Drum Black 1 33 41304205 Toner Yellow 1 41304206 Toner Magenta 1 41304207 Toner Cya...

Page 352: ...Y 1 38 39 41437418 Board Memory 64MB 1 1200 dpi 40 41437419 Board Memory 128MB 1 1200 dpi Duplex 41 42 41376005 HDD Assy 1 Option 43 41286901 Plate Shield 1 44 41278601 Guide Rail A 2 45 41278701 Guid...

Page 353: ...Service Guide C7000 Series Chapter 8 Parts List Page 160 Top Cover Assembly Figure 8 2...

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Page 356: ...op Cover Inner Frame Kit 1 7 41309603 LED Harness M 1 8 41309604 LED Harness C 1 9 41309602 LED Harness Y 1 10 41309601 LED Harness K 1 11 41593101 LED Control PWB Tape Harness 1 12 13 14 40316701 Eje...

Page 357: ...Service Guide C7000 Series Chapter 8 Parts List Page 162 Printer Unit Chassis Figure 8 3...

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Page 362: ...01 Duplex Guide Assy 1 13 40841101 Printer Unit Chassis 1 14 41312801 Left Top Cover Spring Assy 1 15 41312901 Right Top Cover Spring Assy 1 16 40841601 Entrance Sensor Actuator 1 1 17 40841701 Entran...

Page 363: ...y 1 40 40850201 Contact Assy 1 41 40737401 Power Unit AC DC switching 115V 1 41 40737501 Power Unit AC DC switching 230V 1 42 43 40737601 Power Unit high voltage 1 44 HV Tape Harness 1 45 41128101 Pow...

Page 364: ...Service Guide C7000 Series Chapter 8 Parts List Page 164 Paper Tray Guide Figure 8 4...

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Page 367: ...Main Feeder Drive Gear 1 5 40839001 Left Cassette Guide Assy 1 6 40839401 Right Cassette Guide Assy 1 7 8 9 10 11 40349701 Plastic Roller 2 12 40368304 Paper Size Sensing PWB PXC 1 13 14 Paper Size Ac...

Page 368: ...Service Guide C7000 Series Chapter 8 Parts List Page 166 Duplex Unit Figure 8 5...

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Page 371: ...age 167 Duplex Unit Table 8 5 No Part Name Qty Remarks 1 41305301 Duplex Transport Assy 1 2 Screw SP3x10 2 3 Screw T3x10 6 4 Screw T3x8 15 5 Screw M3x6 3 6 70037201 Duplex Unit 1 Copyright 1999 Okidat...

Page 372: ...40360 830B D29A made by Daiichi Denshi or equivalent Cable side l 36 pin plug Type 57 30360 made by Daiichi Denshi or equivalent Plug 552274 1 AMP 552073 1 AMP or equivalent 2 Cable Cable length l 6...

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Page 374: ...y mode Nibble mode ECP mode Data bit length 8 bits Compatibility mode 4 bits Nibble mode 9 bits ECP mode Control Handshaking control is performed in each mode Data received from the host is stored in...

Page 375: ...b On line off line switching timing by ON LINE SW c Off line on line switching by ON LINE SW...

Page 376: ...to the effective INPUT PRIME signal Nibble mode l Conforms to IEEE 1284 specification compliant ECP mode l Conforms to IEEE 1284 specification compliant Copyright 1999 Okidata Division of OKI America...

Page 377: ...uide C7000 Series Chapter B 2nd 3rd Tray Maintenance Page 169 1 Parts Replacement 1 1 Cove rIdle Roller Assy 1 2 PCB 1 3 Feeder Drive Assy Copyright 1999 Okidata Division of OKI America Inc All rights...

Page 378: ...ies Chapter B 2nd 3rd Tray Maintenance Page 170 1 1 Cover Idle Roller Assy 1 Unscrew the four screws 1 to remove the cover side 2 and the plate cover PCB 3 2 Unscrew the two screws 4 to demount the co...

Page 380: ...e C7000 Series Chapter B 2nd 3rd Tray Maintenance Page 171 1 2 PCB 1 Unscrew the four screws 1 to remove the plate cover PCB 2 2 Remove the connectors at seven places and the two screws 3 then demount...

Page 382: ...he eight screws 3 2 Remove the cover sides 4 and 5 the plate cover PCB 6 and the frame hopping Assy 7 3 Remove the E ring 8 the clutch 9 and the two screws 10 4 Unscrew the two screws 11 to remove the...

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Page 385: ...Service Guide C7000 Series Chapter B 2nd 3rd Tray Maintenance Page 173 2 C7000 2nd 3rd Tray Parts List...

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Page 388: ...priate position 1 Is the error message displayed 2 Does the error repeat Yes Yes Turn off on the printer Replace the Drum Assy Service Call 150 Error 153 Error Fuse in the ID unit has not been blown I...

Page 389: ...irm the existence of the unit Re install the Fuser unit and turn off on the printer Replace the Fuser unit Assy Check Belt 330 Belt Error No Belt unit detected when turning on the printer or closing t...

Page 390: ...d in the Fuser unit or between Y ID and Fuser unit 2 Is the Paper eject switch working normally Yes No Remove the jammed paper Replace the Fuser unit Open Stacked Cover 383 Paper Jam Paper jam detecte...

Page 391: ...he Paper out sensor of the specified cassette Replace Belt The belt counter has reached the life value 1 Is the error message displayed 2 Does the error occur soon after Belt unit replacement Yes No C...

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