Oki C7400n Service Manual
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Oki C7400n Service Manual

Oki C7400n Service Manual

C7000 series color led page printer
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Download this manual See also: Configuration Manual, Setup & Installation
C7000 Series
Color LED Page Printer

SERVICE MANUAL

OkiData
01-23-2001 based on Rev.4
1 / 186
41316401TH Rev.4A

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Summary of Contents for Oki C7400n

  • Page 1: Service Manual

    C7000 Series Color LED Page Printer SERVICE MANUAL OkiData 01-23-2001 based on Rev.4 1 / 186 41316401TH Rev.4A...
  • Page 2 Document Revision History Corrected items Person in Rev.No. Date charge Page Description of change 2000-05-29 ISSUE E4 Yamazaki 2000-05-31 E4 Murakami 2000-12-04 NIP9 Yamazaki 2000-12-15 NIP9 Yamazaki 41316401TH Rev.4...
  • Page 3 • In preparing the document, efforts have been made to ensure that the information in it is accurate. However, there may be errors in the document. Oki Data assumes no responsibility for any damage resulting from, or claimed to be the results of, those repairs, adjustments or modifica- tions to the printers which are made by users using the manual.

  • Page 4: Table Of Contents

    CONTENTS 1. CONFIGURATIONS ..................7 System Configuration ....................... 7 Printer Configuration ......................8 Option Configuration ......................9 Specifications ......................... 10 2. OPERATION DESCRIPTION ................. 12 Main Board (CRM PWB) ....................13 Engine Controller Board (K71 PWB) ................15 Power Units ........................16 Mechanical Processes ....................
  • Page 5 3.3.20 Color Registration Sensor Assy................ 70 3.3.21 Duplex Guide Assy ................... 71 3.3.22 Electrical Chassis Cooling Fan ................. 72 3.3.23 Printer Engine Controller PWB ................. 73 3.3.24 Printer Unit Chassis ..................74 3.3.25 Entrance Cassette Sensor Actuator ..............75 3.3.26 Entrance Sensor PWB..................76 3.3.27 Entrance MT Sensor Actuator and Entrance Belt Sensor Actuator ....
  • Page 6 6. TROUBLESHOOTING PROCEDURES ............123 Before Troubleshooting ....................123 Checking before Troubleshooting Image Problems ............. 123 Precautions in Troubleshooting Image Problems ............123 Preparation for Troubleshooting .................. 123 Troubleshooting ......................123 6.5.1 LCD messages list ..................124 6.5.2 Preparation for troubleshooting ..............129 6.5.3 Troubleshooting image problems ..............

  • Page 7: Configurations

    CONFIGURATIONS System Configuration Figure 1-1 shows the system configuration of the C7000 Series of printers. 41316401TH Rev.4...

  • Page 8: Printer Configuration

    Printer Configuration The inside of the printers is composed of the followings: • Electrophotographic Processor • Paper Paths • Controller Block (CU and PU) • Operator Panel • Power Units (High Voltage Unit and Low Voltage Unit) Figure 1-2 shows the printer configuration. Figure 1-2 41316401TH Rev.4...

  • Page 9: Option Configuration

    Option Configuration The following options are available for the C7000 Series of printers. 2nd Tray/ 3rd Tray Duplex Unit Expansion Memory 64/128/256 MB Internal Hard Disk OkiLAN 6200e NIC 41316401TH Rev.4...

  • Page 10: Specifications

    Specifications (1) External Dimensions Height: 16.9 in. Width: 16.9 in. Length: 24.4 in. (2) Weight 92.5 lbs. (3) Papers Type: Ordinary paper, Transparencies (Recommended: MLOHP01) Size: Postal card, Legal 13" or 14", Executive, A4, A5, B5, A6 (Only the 1st tray and the front feeder support A6 and postal-card sizes.) Weight: 1st tray 55 kg to 90 kg (64 to 105g/m Front feeder 55 kg to 140 kg (64 to 163g/ m...
  • Page 11 (12) Temperatures and Relative Humidities Temperature Temperature Condition Temperature (˚F) Temperature (˚C) Remark Operation 50 to 89.6 10 to 32 17 to 27˚C (Temperatures to assure full color print quality) Non-Operation 32 to 109.4 0 to 43 Power-off Storage (Max. One Year) -14 to 109.4 -10 to 43 With drum and toner...

  • Page 12: Operation Description

    OPERATION DESCRIPTION The C7000 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 fusing. A black-writing printing method by shedding light on print areas is used. Figure 2-1 provides the block diagram of the printers.

  • Page 13: Main Board (Crm Pwb)

    Main Board (CRM PWB) Figure 2-2 provides the block diagram of the main control board (CRM PWB). Figure 2-2 13 / 41316401TH Rev.4...
  • Page 14 The IDE HDD is used for storing font data, spooling edited video data and registering form data. (10) PCI Bus Option Two PCI I/F slots are provided for option board use. The bus, which uses an Oki Data original connector, can accept an Ethernet board. (11) Host Interface...

  • Page 15: Engine Controller Board (K71 Pwb)

    CPU (MSM66Q577), general LSI chip, flash ROM, EEPROM, pulse motor drivers and a video memory (see Figure 2-4). This, a 16-bit CPU with an AD converter containing 126-Kbyte ROM (OKI MSM66Q577), controls the entire system. General LSI...

  • Page 16: Power Units

    Flash ROM The flash ROM (29F400-70) is of 4-Mbits, and PU programs are stored in it. EEPROM The EEPROM (NM93C66N-NW) is of 4-Kbits, and mounted on the board with an IC socket. Correction values are stored in it. Pulse Motor Driver The pulse motor driver (A2919SLBTR, A2918SWV) drives the eight pulse motors to revolve the EP and transport media.

  • Page 17: Mechanical Processes

    Mechanical Processes Figure 2-4 shows the mechanical processes of the C7000 Series of printers. Figure 2-4 17 / 41316401TH Rev.4...

  • Page 18: Electrophotographic Process

    2.4.1 Electrophotographic process Electrophotographic process The following is the outline of electrophotographic process: 1 Charging DC voltage is applied to the charging roller and the surface of the OPC drum is negatively and evenly charged. 2 Exposure The LED head, under image signals, emits light to the negatively charged surface of the OPC drum.
  • Page 19 Charging Negative DC voltage is applied to the charging roller contacting the surface of the OPC drum. Power Charging roller unit OPC drum Exposure The negatively charged surface of the OPC drum is radiated 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 the potentials of the surface is formed on the drum surface.
  • Page 20 Development 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.
  • Page 21 Transfer The transfer roller, which is made of conductive sponge, presses paper against the surface of the OPC drum and brings the paper into intimate contact with the drum surface. The paper is placed on the drum surface, and positively (opposite to the charge of the toner) charged by the transfer roller on its back.
  • Page 22 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. Waste toner area 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.

  • Page 23: Paper Running Process

    2.4.2 Paper running process Figure 2-5 shows the traveling of paper in the C7000 Series of printers. Registration roller Assy (B) Unit Fuser Face-down stacker Head Hopping roller Heat roller Eject roller Multipurpose tray Registration roller Assy (A) Belt unit Low voltage Backup roller power supply...
  • Page 24 Paper Feed from Tray 1. The running of the feed motor in the arrow direction (a) drives the feed roller and the nudger roller. This operation feeds paper from the tray. 2. After the beginning of the paper turns the entrance cassette sensor on, the paper is advanced a fixed length.
  • Page 25 Paper Feed from Multipurpose Tray (MT) 1. The release lever usually pushes down the hopping plate to a position that turns microswitch on (Figure 2-7-a). 2. The running of the motor in the (a) direction drives the MT feed roller and turns the cam. The cam pushes the release lever and the hopping plate picks up paper sent out by the MT feed roller (Figure 2-7-b), where the registration roller Assy (B) does not move because its one-way clutch gear (1) idles.
  • Page 26 Transport Belt 1. The running of the transport belt motor in the arrow direction (a) drives the transport belt. The 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 paper on the transport belt into the fuser unit, transferring a toner image on each color’s drum.
  • Page 27 Driving and Up-and-Down Movements of I/D Unit 1. The I/D unit driving and up-and-down movements are effected by a single-pulse motor. The running of the main motor in the arrow direction (a) turns the lever 1 to the left. Then, the lever 2 that was lifted by the lever 1 lowers to move down the I/D unit.
  • Page 28 Plate Spring Board Up/down sensor Figure 2-9-c Figure 2-9-d Figure 2-9-e 28 / 41316401TH Rev.4...
  • Page 29 Fuser Unit and Paper Ejection 1. A single-pulse motor drives the fuser unit and the eject rollers. In response to the running of the heat motor in the arrow direction (a), the heat roller turns. This roller fuses a toner image to paper by heat and pressure. 2.
  • Page 30 Duplex Unit 1. When the duplex unit receives an instruction from the printer to print on both sides of a sheet of paper, the solenoid opens the separator after the completion of one side printing of a sheet of paper sent from the tray. The path is switched to that to the duplex unit. At this time, as the roller (1) turns in the direction of the arrow “a,”...

  • Page 31: Sensor

    Sensor 2.5.1 Paper related sensors Paper eject roller Stacker full sensor MT feed roller Entrance belt sensor C drum M drum Y drum K drum Heat roller Pinch roller 2 Driving roller Exit sensor Pinch roller 1 Driving roller Registration roller A Backup roller Belt cleaning blade Transport belt...

  • Page 32: Other Sensors

    2.5.2 Other sensors Paper Empty sensor This sensor checks whether the paper cassette is empty. Paper Near sensor This sensor checks whether the paper cassette is near empty. MT Paper Empty sensor This sensor checks whether paper exists in the front feeder. MT Hopping switch This microswitch checks whether the front feeder table is in the up position or in the down position.

  • Page 33: Color Misalignment Correction

    Color Misalignment Correction Each of the C7000 Series of printers is equipped with 4 ID units and LED heads, which can cause color misalignment. This color misalignment is automatically corrected as follows: Color alignment to be corrected 1 Color misalignment in X-axis direction (Positional error caused by LED 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) Correcting...

  • Page 34: Paper Jam Detection

    Paper Jam Detection The C7000 Series of printers detect paper jams after power-on and during printing. When a paper jam occurs, the printing operation is immediately suspended. After the cover is opened and the jammed paper is removed, closing the cover resumes the printing. Classification/Belt ERROR Error Condition...

  • Page 35: Cover-Open

    Cover-Open When the top cover of the printer is open, the cover-open microswitch turns off to cut the high 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 microswitch also turns off and the 32V power to the duplex unit is cut.

  • Page 36: Toner Low Detection

    2.10 Toner Low Detection • Structure The toner low detection device consists of the stirring gear that revolves at a constant speed, the stirring bar, and the magnet on the stirring bar. The stirring bar turns in synchronization with the protrusion of the stirring gear. Stirring gear Protrusion Stirring bar...

  • Page 37: Page Size Detection

    Toner Full Condition (12PPM) t1<1.08 TNRSNS T=2.3 Toner Low Condition (12PPM) t1>1.08 TNRSNS T=2.3 • When the toner low condition is detected 20 consecutive times, toner low is determined. (The toner low message is displayed when about 500 A4 sheets at 5% density have been printed after toner low had been detected.) •...

  • Page 38: Operation At Power-On

    2.12 Operation at Power-on 2.12.1 Self-diagnostic test Initial test The followings are automatically performed at power-on. (a) ROM check (b) RAM check (c) EEPROM check (d) Flash ROM check ROM check ROM is checked by calculating a HASH value. RAM check (a) RAMs are by type.

  • Page 39: Color Misalignment Detection

    2.13 Color Misalignment Detection Reflection-type optical sensors for detecting color misalignment (Z71-PCB) are mounted on the belt at the right and left ends, respectively, in front of the toner scraping (cleaning) blade 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 sensors, the misalignment amounts are measured with respect to Black to determine correction values.

  • Page 40: Version Read Of Units Replaced Periodically

    2.14 Version Read of Units Replaced Periodically The version of each of the I/D, fuser unit and belt unit which are replaced periodically is determined whether 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.

  • Page 41: Parts Replacement

    PARTS REPLACEMENT This section describes 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. Precautions in Replacing Parts Before replacing the parts, be sure to remove the AC cable and the interface cable. (a) To remove the AC cable, always use the following procedure.
  • Page 42 [Maintenance Tools] Table 3-1 lists tools necessary to replace the FRU's (Field Replaceable Units). Table 3-1 Maintenance Tools Maintenance Tools Q' ty Use for Remark No. 1-100 Philips Screws of 2 to 2.5mm screwdriver No. 2-200 Philips Screws of 3 to 5mm magnetic screwdriver No.

  • Page 43: Parts Layout

    Parts layout Figure 3-1 43 / 41316401TH Rev.4...
  • Page 44 [Top Cover Assy] Figure 3-2 44 / 41316401TH Rev.4...
  • Page 45 [Printer Unit-1/2] Figure 3-3 45 / 41316401TH Rev.4...
  • Page 46 [Printer Unit-2/2] Figure 3-4 46 / 41316401TH Rev.4...
  • Page 47 [Cassette Guide Assy (L),(R)] C’ C’ Figure 3-5 47 / 41316401TH Rev.4...
  • Page 48 [Duplex Unit] Figure 3-6 48 / 41316401TH Rev.4...

  • Page 49: Replacing Parts

    Replacing Parts This section describes how to replace the parts and assemblies shown in the following disassembling system diagram. C7000 41256201 Print Engine Controller PWB (3.3.23) LED Assy (3.3.2) 40737401 Low Voltage Power Supply (3.3.36) 40737601 High Voltage Power Supply (3.3.37) 40839001 4PP4122-1217P001 Cassette Guide...
  • Page 50 CU Board Assy 41356004 40946809 41395304 Board_CRM PCB Assy_CRM Board Assy-CU 41286901 41469503 Plate_Shield Board_TNY 41278601 2 41356110 Guide_Rail (A) Japanese font ROM DIMM Board_TNO 41278701 (Two Heisei fonts) Guide_Rail (B) 41437402 41371601 2 Board Memory 64MB Plate_Support (C) 41395401 Plate_Support (FAN) 41410201 Motor-Fan 60x60x15...

  • Page 51: Top Cover

    3.3.1 Top Cover (1) Open the Top Cover assy. (2) Remove the nine screws 1 to detach the top cover 2. Figure 3-3-1 Top Cover 51 / 41316401TH Rev.4...

  • Page 52: Led Assy/ Led Assy Spring

    3.3.2 LED Assy/ LED Assy Spring (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.

  • Page 53: Top Cover Unit

    3.3.3 Top Cover Unit (1) Remove the top cover (see section 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), and unplug the connector to separate the top cover.

  • Page 54: Control Panel Assy/ Control Panel Bezel/ Led Control Pwb/ Toner Sensors/Stacker Full Sensor/ Control Panel/ Control Panel Tape Harness/ Eject Rollers

    3.3.4 Control Panel Assy/ Control Panel Bezel/ LED Control PWB/ Toner Sensors/ Stacker Full Sensor/ Control Panel/ Control Panel Tape Harness/ Eject Rollers (1) Detach the control panel bezel placed in the control panel Assy 2. (2) Remove the screw 1 to demount the control panel Assy 2. (3) Detach the control panel tape harness D.

  • Page 55: Top Cover Handle/ Top Cover Latch/ Top Cover Latch Spring

    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 top cover latch springs 4 become detached). Figure 3-3-5 Top Cover Handle/ Tope Cover Latch/ Top Cover Latch Spring 55 / 41316401TH Rev.4...

  • Page 56: Eject Guide Assy

    3.3.6 Eject Guide Assy (1) Remove the five screws 1 to detach the eject guide Assy 2. Figure 3-3-6 Eject Guide Assy 56 / 41316401TH Rev.4...

  • Page 57: Cassette Assy/ Front Cover Assy/ Front Cover Inner Baffle

    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 the front cover inner baffle 3. Figure 3-3-7 Cassette Assy/ Front Cover Assy/ Front Cover Inner Baffle 57 / 41316401TH Rev.4...

  • Page 58: Retard Pad Assy/ Retard Pad Assy Spring

    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 detached). Figure 3-3-8 Retard Pad Assy/ Retard Pad Assy Spring 58 / 41316401TH Rev.4...

  • Page 59: Feed Roller And Nudger Roller

    3.3.9 Feed Roller and Nudger Roller (1) Remove the cassette. (2) Unlatch and demount the feed roller 1. (3) Unlatch and demount the nudger roller 2. Figure 3-3-9 Feed Roller and Nudger Roller 59 / 41316401TH Rev.4...

  • Page 60: Rear Cover

    3.3.10 Rear Cover (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. Figure 3-3-10 Rear Cover 60 / 41316401TH Rev.4...

  • Page 61: Face-Up Tray

    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. Figure 3-3-11 Face-Up Tray 61 / 41316401TH Rev.4...

  • Page 62: Left Side Cover

    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 cover 5. Figure 3-3-12 Left Side Cover 62 / 41316401TH Rev.4...

  • Page 63: Right Side Cover

    3.3.13 Right Side Cover (1) Open the top cover 1. (2) Open the front cover 2 and undo the screw 3. (2) Remove the four screws 4 to detach the right side cover 5. Figure 3-3-13 Right Side Cover 63 / 41316401TH Rev.4...

  • Page 64: Multipurpose Tray Assy/ Multipurpose Tray Cover Assy/ Links/Multipurpose Tray Top Cover/ Multipurpose Tray Drive Gear

    3.3.14 Multipurpose Tray Assy/ Multipurpose Tray Cover Assy/ Links/ Multipurpose Tray Top Cover/ Multipurpose Tray Drive Gear (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 left plate Assy (see section 3.3.22). (4) Remove the three screws 1 to detach the multipurpose tray top cover 2.

  • Page 65: Drum Contact Assys

    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 1. Figure 3-3-15 Drum Contact Assys 65 / 41316401TH Rev.4...

  • Page 66: Registration Roller Assy (A)/ Registration Drive Gear (A)

    3.3.16 Registration Roller Assy (A)/ Registration 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 demount the registration roller Assy (A) 2. (5) Remove the E ring 3 to detach the registration gear (A) 4.

  • Page 67: Registration Roller Assy (B)

    3.3.17 Registration Roller Assy (B) (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). (7) Unscrew the four screws 1, and pull out the registration Assy (B) 1 in the arrow direction.

  • Page 68: Registration Clutch And Registration Motor Assy

    3.3.18 Registration Clutch and Registration 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 registration clutch 2.

  • Page 69: Main Cooling Fan

    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 orientation. Outlet Figure 3-3-19 Main Cooling Fan 69 / 41316401TH Rev.4...

  • Page 70: Color Registration Sensor Assy

    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 plate B 3. Connectors Figure 3-3-20 Color Registration Sensor Assy 70 / 41316401TH Rev.4...

  • Page 71: Duplex Guide Assy

    3.3.21 Duplex Guide Assy (1) Unlatch and demount the duplex guide 1. Main chassis (rear) Figure 3-3-21 Duplex Guide Assy 71 / 41316401TH Rev.4...

  • Page 72: Electrical Chassis Cooling Fan

    3.3.22 Electrical Chassis Cooling 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 the shield plate 6. (5) Unscrew the screws 7 to demount the electrical chassis cooling fan 8.

  • Page 73: Printer Engine Controller Pwb

    3.3.23 Printer Engine 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 controller PWB 2. Figure 3-3-23 Printer Engine Controller PWB 73 / 41316401TH Rev.4...

  • Page 74: Printer Unit Chassis

    3.3.24 Printer Unit Chassis (1) Unscrew 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 spring Assy 7. (4) Unscrew the four black screws 8 and remove the right top cover spring Assy 9.

  • Page 75: Entrance Cassette Sensor Actuator

    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 the entrance cassette sensor actuator 1. Main chassis Figure 3-3-25 Entrance Cassette Sensor Actuator 75 / 41316401TH Rev.4...

  • Page 76: Entrance Sensor Pwb

    3.3.26 Entrance Sensor PWB (1) Remove the registration roller Assy (B) (see section 3.3.17). (2) Remove the two screws 1 to detach the entrance sensor PWB 2. Figure 3-3-26 Entrance Sensor PWB 76 / 41316401TH Rev.4...

  • Page 77: Entrance Mt Sensor Actuator And Entrance Belt Sensor Actuator

    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) Unlatch and detach the entrance belt actuator 2. Figure 3-3-27 Entrance MT Sensor Actuator and Entrance Belt Sensor Actuator 77 / 41316401TH Rev.4...

  • Page 78: Fuser Exit Roller

    3.3.28 Fuser Exit Roller (1) Unscrew the two screws 1 to remove the duplex gate solenoid 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.

  • Page 79: Exit Sensor Assy

    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 Assy 2. Figure 3-3-29 Exit Sensor Assy 79 / 41316401TH Rev.4...

  • Page 80: Fuser Latching Handle (L)

    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. Figure 3-3-30 Fuser Latching Handle (L) 80 / 41316401TH Rev.4...

  • Page 81: Belt Motor Assy

    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 blt motor Assy 3. Figure 3-3-31 Belt Motor Assy 81 / 41316401TH Rev.4...

  • Page 82: Fuser Latching Handle (R)

    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 fuser latching handle (R) 3. Figure 3-3-32 Fuser Latching Handle (R) 82 / 41316401TH Rev.4...

  • Page 83: Main Motor Assy

    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 Assy 2. Figure 3-3-33 Main Motor Assy 83 / 41316401TH Rev.4...

  • Page 84: Main Feeder Drive Motor

    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 main feeder drive motor gears A 5 and B 6. Figure 3-3-34 Main Feeder Drive Motor 84 / 41316401TH Rev.4...

  • Page 85: Contact Assy/ Left Plate Assy

    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 to detach the contact Assy 4. Figure 3-3-35 Contact Assy/ Left Plate Assy 85 / 41316401TH Rev.4...

  • Page 86: Low Voltage Power Supply

    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 4 to detach the low voltage power supply 5. Figure 3-3-36 Low Voltage Power Supply 86 / 41316401TH Rev.4...

  • Page 87: High Voltage Power Supply

    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 voltage power supply (2) and the tape harness 3. Figure 3-3-37 High Voltage Power Supply 87 / 41316401TH Rev.4...

  • Page 88: Main Feed Assy

    3.3.38 Main Feed Assy (1) Remove the printer 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 the four screws 3 to detach the main feed Assy 4.

  • Page 89: Cassette/ Left Guide Assy

    3.3.39 Cassette/ Left Guide Assy (1) Remove the printer unit chassis (see section 3.3.24). (2) Remove the main feed 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.

  • Page 90: Cassette/ Right Guide Assy

    3.3.40 Cassette/ Right Guide Assy (1) Remove the printer unit chassis (see section 3.3.24). (2) Remove the main feed Assy (see section 3.3.38). (3) Remove the five screws 1 to detach the right cassette guide Assy 2. At the same time, the earth plate 3 becomes detached.

  • Page 91: Fuser Unit

    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. Figure 3-3-41 Fuser Unit 91 / 41316401TH Rev.4...

  • Page 92: Belt Unit

    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 unit Handle (blue) Figure 3-3-42 Belt Unit 92 / 41316401TH Rev.4...

  • Page 93: Duplex Unit

    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. Latch Latch Figure 3-3-43 Duplex Unit 93 / 41316401TH Rev.4...

  • Page 94: Guide Rails (L) And (R)

    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. Figure 3-3-44 Guide Rail (L), (R) 94 / 41316401TH Rev.4...

  • Page 95: Duplex Transport Assembly

    3.3.45 Duplex Transport Assembly (1) Turn over the duplex transport Assy. (2) Unscrew the three screws 1 and five screws 2 to detach the plate 3. (3) Unplug the connector and detach the mold Assy 4. (4) Detach the two actuators 5. (5) Unscrew the screws 6 and 7 to remove the earth 8.
  • Page 96 Duplex transport sensor Cord duplex connector Assy Idle roller spring Duplex transfer Assy Idle roller Idle roller shaft Figure 3-3-45 Duplex Transport Assembly 96 / 41316401TH Rev.4...

  • Page 97: Cu Assy

    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 3. 2. Remove the two screws 4. 3.
  • Page 98 (3) Removing the CRM Board 1. Unscrew the four screws 6 to remove the fan bracket 7. 2. Unscrew the four screws 8 to remove the plate support 9 and the guide rail A 0. 3. Unscrew the two screws A to remove the guide rail B B. 4.

  • Page 99: Adjustments

    ADJUSTMENTS Adjustments 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 intended adjustment. Maintenance Modes and Their Functions 4.1.1 Maintenance menu...

  • Page 100: Engine Maintenance Mode

    4.1.2 Engine maintenance mode The engine maintenance mode includes three modes, levels 1 to 3. The level 1 aims to assist in checking the media transport systems and the basic operations of printing systems etc. The level 2, which sets the consumable counter and tests the color registration adjustment function, does not require relatively special knowledge.

  • Page 101: Switch Scan Test

    4.1.2.3 Switch scan test This self-diagnosis is used when the input sensor and the switch are checked. 1. Enter the general diagnosis mode, and press and hold the 1 1 1 1 1 and 5 5 5 5 5 keys down until “SWITCH SCAN”...
  • Page 102 Cover-upper switch Upper fuser center sensor MT-OHP (transparency) sensor Toner K sensor Toner M sensor Entrance belt sensor Lower fuser center sensor Toner C sensor Toner Y sensor Paper empty sensor Starker full sensor Exit sensor Entrance MT sensor Color registration sensor (L) Cover front switch Color registration sensor (R) Temperature and...
  • Page 103 103 / 41316401TH Rev.4...

  • Page 104: Motor And Clutch Test

    4.1.2.4 Motor and clutch test This self-check routine is used for testing the motor and clutch. 1. Go to the self-diagnosis (level 1) mode, and hold the 1 1 1 1 1 and 5 5 5 5 5 keys down until the upper display of “MOTOR &...
  • Page 105 Main motor (H) Fuser motor Main motor (C) Main motor (Y) Exit solenoid Belt motor Main motor (K) Registration motor Registration clutch Cassette1 hopping motor Cassette2 clutch Duplex motor Cassette2 motor Sensor shutter Cassette3 clutch Cassette3 motor Figure 4-3 Table 4-2 Unit Name Display Driving Constrains Constraints Display...

  • Page 106: Test Printing

    4.1.2.5 Test printing This self-diagnostic routine is used when the internal test patterns of the PU are printed. Other test patterns are stored in the controller. 1. Go to the self-diagnosis (level 1) mode, and hold the 1 1 1 1 1 and 5 5 5 5 5 keys down until “TEST PRINT” comes into view in the upper display (the 1 1 1 1 1 key is for test item increment and the 5 5 5 5 5 key for test item decrement).
  • Page 107 • Following messages are showing at warm-up and during printing. P=*** T=*** U=***[###] H=***% L=***[###] P: Number of Sheets Printed for Test (in prints) U: Upper-Heater 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 Measurement (in units of %) •...
  • Page 108 KR=*.**KV YR=*.**KV MR=*.**KV CR=*.**KV 4. While "PRINT EXECUTE" is indicated in the lower display after the Item 2 procedure, press Key (3) to start test printing with the values set in Item 2 and 3 procedures. To suspend test printing, press Key 7 7 7 7 7 . At the start of or during test printing, if any 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.
  • Page 109 Pattern 5 Pattern 6 Pattern 7 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). 109 / 41316401TH Rev.4...

  • Page 110: Nvm Initialization

    4.1.2.6 NVM initialization The self-diagnosis is used to initialize non-volatile memory. 1. Enter the self-diagnosis (Level 1) mode, and continue to press the 1 1 1 1 1 and 5 5 5 5 5 keys until “NV-RAM INITIAL” appears on the upper display (the 1 1 1 1 1 key is for test item increment and the 5 5 5 5 5 key for test item decrement).

  • Page 111: Consumable Counter Display

    4.1.2.7 Consumable counter display The self-diagnosis is used to indicate the consumable consumption status. 1. After entering the general self-diagnosis mode, hold the 1 1 1 1 1 and 5 5 5 5 5 keys down until “CONSUMABLE STATUS” appears on the upper display (the 1 1 1 1 1 key is for test item increment and the 5 5 5 5 5 key for test item decrement).

  • Page 112: Error Messages And Their Details

    4.1.2.9 Error Messages and their Details Error Messages. Error Message Details BLACK DRUM UP/DOWN ERROR Black ID up/down error BLACK DRUM UNIT FUSE CUT ERROR Black ID unit fuse cut error BLACK TONER SENSOR ERROR Black toner sensor error BLACK LED HEAD ERROR Black LED head error BLACK TONER LOW Black toner is low.
  • Page 113 Error Message Details HOPPING ERROR DUPLEX Duplex 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:DUPLEX INPUT Duplex unit input jam INPATH:DUPLEX ENTRY Duplex unit entry jam INPATH:DUPLEX REVERSAL Duplex unit reversal jam INFEED:TRAY1...
  • Page 114 Error Message Details OPECODE TRAP ERROR Operation cord trap error POWER LSI ERROR Power unit LSI error PANEL I/F ERROR Opeator panel I/F error PU FAN MOTOR ERROR PU fan motor error PAPER SIZE ERROR Paper size error PAPER END SELECTED TRAY No paper is left in the selected tray.
  • Page 115 Error Message Details INPATH:FEED Feed jam INPATH:TRANSPORT Transport jam INPATH:EXIT Exit jam INPATH:DUPLEX INPUT Duplex unit input jam INPATH:DUPLEX ENTRY Duplex unit entry jam INPATH:REVERSAL Duplex unit reversal jam INFEED:TRAY1 Tray1 hopping error INFEED:TRAY2 Tray2 hopping error INFEED:TRAY3 Tray3 hopping error INFEED:FRONT FEEDER Front feeder hopping error INFEED:DUPLEX...

  • Page 116: Crm Board Adjustments

    Morisawa fonts)). With Kanji fonts Without Kanji fonts LED Head Width Resolution Two Heisei fonts Five Morisawa fonts ODA/OEL/ASP 600dpi ML3010c OKI C7200 1200dpi OKI C7400 600dpi ML3020c OKI C9200 1200dpi ML3050c OKI C9400 EEPROM Initialization To initialize the EEPROM, enter the maintenance mode and select the EEPROM RESET item after the general start-up.

  • Page 117: Short Plug Settings

    4.1.3.1 Short plug settings The CRM board has five short plugs that can be set as follows: Short Plug (WE1, 3, 5 and 7) Sets flash ROM DIMM to connect WE signals. (1-2 Short: Disconnects WE signals; 2-3 Short: Connects WE signals.) Factory 2-3 Short Setting: Re-programmable flash ROM DIMM.

  • Page 118: Adjustments After Parts Replacement

    Adjustments after Parts Replacement Adjustment to be implemented after each part replacement is described below. Adjustment and correction of color registration are always required for each part replacement. Adjustment Replaced Part LED Head Color balance adjustment Drum Cartridge (Y, M, C, K) Not required.

  • Page 119: Eeprom Replacement After Crm Board Replacement

    Note! The life information on the belt, toner, IDs etc. is cleared due to replacement of the EEPROM. Take note that an error occurs in the each unit’s life count until the unit is replaced. Following is counts cleared after the replacement of the EEPROM. Item Count Description of Count...

  • Page 120: Color Balance Adjustment

    Color Balance Adjustment Color balance has been adjusted appropriately when a printer is shipped from the plant. However, it may be out of the appropriate balance during use. In such a case, color balance should be modified. Note: Density of each color depends on each other. Therefore, adjustment must be repeated several times to reach the correct color balance.
  • Page 121 121 / 41316401TH Rev.4...

  • Page 122: Periodic Maintenance

    PERIODIC MAINTENANCE Parts Replaced Periodically It is recommended that the following parts be periodically replaced, as specified, by users (when they are not replaced, the print quality is not assured and printer problems may result). Parts Name Time of Replacement Condition for Replacement Adjustment after Replacement Large-Capacity...

  • Page 123: Troubleshooting Procedures

    TROUBLESHOOTING PROCEDURES Before Troubleshooting Check the basic check items covered in the user’s manual. Obtain as much information about problems from users as you can. Perform inspections in conditions close to those in which problems occurred. Checking before Troubleshooting Image Problems Is the printer's operating environment correct? Have the consumables (toner, drum cartridges) been properly replaced? Is the correct media being used? Refer to the media specification.

  • Page 124: Lcd Messages List

    6.5.1 LCD messages list When detects unrecoverable errors, the printer provides the following service call error 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.
  • Page 125 Table 6-1-1 Operator Alarms (2/5) Message Cause Error Description Solutions CU EEPROM Error Service Call Can the printer recover from the error by Replace the EEPROM. (Settings of the 040: Error replacing the EEPROM on the CU board? user must be restored on the new.) Replace the CRM board.
  • Page 126 Table 6-1-1 Operator Alarms (3/5) Message Cause Error Description Solutions Service Call Error detected at the 1) Is the error message displayed? Turn off/on the printer. 125: Error MT home position. 2) Does the error repeat? Replace the MT. Service Call Temperature rise at 1) Is the error message displayed? Turn off the printer, leave it for 30 min and...
  • Page 127 Table 6-1-1 Operator Alarms (4/5) Message Cause Error Description Solutions End of the ID unit life. Install New Drum Is it displayed soon after the ID unit Confirm the life of the ID unit. more copies printed. replacement? 350: Y Drum Life 351: M Drum Life Replace the ID unit.
  • Page 128 Table 6-1-1 Operator Alarms (5/5) Message Cause Error Description Solutions Load *** Papers The specified cassette 1) No paper in MT? Load papers in MT. 490: No paper in has no paper or is the MP Tray removed. Or, the 2) Does the Paper out sensor operate Replace the Paper out sensor.

  • Page 129: Preparation For Troubleshooting

    6.5.2 Preparation for troubleshooting Display on operation panel The failure status of the printer is provided on the LCD (liquid crystal display) of the operator panel. Perform appropriate troubleshooting according to messages on the LCD. Failure Flowchart No. Printer Malfunction after Turn-on Jam Error Paper Loading Jam (1st tray) Paper Loading Jam (Multipurpose tray)
  • Page 130 The printer does not operate properly after power-on. • Turn the printer off and on again. • showing on the LCD (about for one second).? • Is the AC cable connected properly? Connect the AC cable correctly. • Yes Is +5V output to the panel connector (OPTN connector) on the engine board (71K PWB)? Pins 6, 7 and 14: +5V Pins 1, 3, 11 and 16: 0V Yes Is +5V output to the panel connector on the relay board (71 PWB)? Pin 5: +5V...
  • Page 131 2-1 Paper Loading Jam (1st Tray) • Has the paper loading jam occurred immediately after power-on? • Yes Is the paper jammed at the entrance cassette sensor or the entrance MT sensor? • Remove the jammed paper. • Does the sensor lever (entrance cassette sensor, entrance MT sensor) move properly? •...
  • Page 132 2-2 Paper Loading Jam (Multipurpose Tray) • Has the paper loading jam occurred immediately after power-on? • Yes Is the paper jammed at the entrance cassette sensor or the entrance MT sensor? Yes Remove the jammed paper. • Does the entrance MT sensor lever move properly? Replace the defective sensor lever.
  • Page 133 2-3 Paper feed jam • Has the paper feed jam occurred immediately after power-on? • Yes Is the paper jammed at the entrance belt sensor? Yes Remove the jammed paper. • Does the write sensor lever move properly? Replace the write sensor lever. •...
  • Page 134 2-4 Paper Exit Jam • Has the paper exit jam occurred immediately after power-on? • Yes Is the paper jammed at the exit sensor? Yes Remove the jammed paper. • Does the sensor lever move properly? Replace the sensor lever. •...
  • Page 135 2-5 Duplex Jam • Has the paper feed jam occurred immediately after power-on? • Yes Does the paper exist in the duplex unit? Yes Remove the jammad paper. • Do the levers of the duplex-in, rear and front sensors move properly? Replace the defective sensor lever.
  • Page 136 Paper Size Error • Has the proper size paper used? Use the proper size paper. • Has the jam occurred at the entrance FF sensor or the paper width sensor? Yes Remove the jammed paper. • Does the entrance FF sensor lever move properly? Replace the defective sensor lever.
  • Page 137 Image Drum Unit (ID) Up-and-Down Operation Error • Turn the printer off and, after a few seconds, on again. • Are all the ID drums revolving properly during printing? • Does the resistance of the ID motor lie at the rated value (approx. 4.0 )? Replace the defective IDU motor.
  • Page 138 Fusing Unit Error • Has the fuser error occurred immediately after power-on? • Yes Is the heat roller thermistor broken or short-circuited? (See Figure 6-1.) (approx. 190k to 980k at room temperatures of 0 to 43˚C) • Yes Replace the fuser unit. •...
  • Page 139 Motor Fan Error • Does the low voltage power supply fan run after power-on? • Is 32V output to the fuse FU502 of the engine board (71K PWB)? • Is 32V output to the power connector of the engine board (71K PWB)? 32V: Pins 7, 8, 9 and 10 Replace the low voltage power unit after checking the cable connection.

  • Page 140: Troubleshooting Image Problems

    6.5.3 Troubleshooting image problems Following is the troubleshooting for image problems illustrated below: Image problem Flowchart No. Light or faded image on whole page, or color misalignment on whole page (Figure 6-2 A ) Dirty background (Figure 6-2 B ) Blank page (Figure 6-2 C ) Vertical belt or line (black or color belt, or black or color line) (Figure 6-2 D ) Vertical white belt or line, or uneven-color belt or line (Figure 6-2 F )
  • Page 141 Light or Faded Image on Whole Page, or Color Misalignment on Whole Page (Figure 6-2 A ) • Are toners running short (is toner low displayed)? Yes Supply toner(s). • Is proper paper used? Use proper paper. • Are the LED head lenses dirty? Yes Clean the dirty lens(es).
  • Page 142 Dirty Background (Figure 6-2 B ) • Were the image drums exposed to external light for a long time? Yes Replace the ID unit(s). • Is the roller of the fuser unit dirty? Yes Replace the fuser unit. • Correct the PAPER TYPE setting. Light: 60 g/m Medium Light: 67.5 g/m Medium: 75 g/m...
  • Page 143 Blank Page (Figure 6-2 C ) • Are the LED head Assys connected to the junction board (Y71 PWB) and the engine board (71K PWB) properly? Connect the LED Assy(s) to the junction board (Y71 PWB) and the engine board (71K PWB) properly, checking the cable connection.
  • Page 144 Vertical Belt or Line (Black or Color Belt, or Black or Color Line) (Figure 6-2 D ) • Are the LED head Assys connected to the junction board (Y71 PWB) properly? Connect the LED head Assy(s) to the junction board properly. •...
  • Page 145 Vertical White Belt or Line, or Uneven-Color Belt or Line (Figure 6-2 F ) • Are the LED heads dirty? Yes Clean the dirty LED head(s). • Are the LED head Assys connected to the junction board (Y71 PWB) properly? Connect the LED head Assy(s) to the junction board (Y71 PWB) properly.
  • Page 146 Poor Fusing (Ink spreads or peels when touched with fingers.) • Is proper paper used? Use proper paper. • Is the contact of the fuser unit connected properly? Connect the contact of the fuser unit properly. • Is the roller of the fuser unit dirty? Yes Replace the fuser unit Assy.
  • Page 147 Defective Image of Regular Interval (See Figure 6-2 E ) Interval Problem Troubleshooting 94.2 mm Image Drum Replace the image drum unit. 63.6 mm Developing Roller Replace the image drum unit. 57.8 mm Toner Supply Roller Replace the image drum unit. 44.0 mm Charging Roller Replace the image drum unit.
  • Page 148 Missing Image • Are LED heads dirty? Yes Clean the LED head(s). • Are the LED head Assys connected to the junction board (Y71 PWB) properly? Connect the LED head Assy(s) to the board, checking the cable connection between the LED head(s) and the junction board.
  • Page 149 Color Misalignment • Is the color menu of the user menu mode "Automatic Color-Registration Adjustment" OFF? Yes Make it on. Recovered? Yes End • "TONER LOW" is displayed. Yes Replenish toner. Recovered? Yes End • Execute the color registration test in the engine maintenance mode. Procedures: Enter the self-diagnostic mode (Level 1) of the engine maintenance mode.
  • Page 150 • Verify connection between the connector on Z71-PWB (color-registration sensor board) and RSNS/POWER connectors on 71K-PWB (engine board). Yes End • Replace Z71-PWB. Recovered? Yes End • Replace the engine board. Recovered? Yes End • Replace the cable connecting Z71-PWB and the engine board. Recovered? Yes End •...
  • Page 151 • Are there problems in the gears (the gear Assys of the I/Ds, multipurpose tray, belt unit or belt motor)? Yes Replace the damaged gear Assy(s). • Connect the LED head unit(s) to the junction board properly. Connect the boards correctly. •...
  • Page 152 Color Different from Original One • Are the LED head lenses dirty? Yes Clean the LED head lens(es). • Are the LED head Assys connected to the junction board (Y71 PWB) properly? Connect the LED head Assy(s) to the junction board, checking the cable connection between them.
  • Page 153 Ground Charging roller Developing roller Toner supply roller Figure 6-3 153 / 41316401TH Rev.4...

  • Page 154: Connection Diagram

    Unit Circuit Diagram Illustration Resistance Brawn Between pins 1 and 2: 7.9 Transport Belt Motor Between pins 3 and 4: 7.9 Yellow Blue Between pins 1 and 2: 4 Main Motor (Y) Between pins 3 and 4: 4 Between pins 1 and 2: 4 Main Motor (M) Between pins 3 and 4: 4...
  • Page 155 Unit Circuit Diagram Illustration Resistance Between pins 1 and 2: 4 Main Motor (C) Between pins 3 and 4: 4 Between pins 1 and 2: 4 Main Motor (K) Between pins 3 and 4: 4 Between pins 1 and 2: 7.9 Registration Motor Between pins 3 and 4: 7.9...
  • Page 156 Unit Circuit Diagram Illustration Resistance Brown Between pins 1 and 2: 7.9 Fuser Motor Between pins 3 and 4: 7.9 Yellow Blue Between pins 1 and 2: 7.9 Feeder Motor Between pins 3 and 4: 7.9 Between pins 1 and 2: 6.7 Duplex Motor Between pins 3 and 4: 6.7...
  • Page 157 Unit Circuit Diagram Illustration Resistance +32 V White Main Cooling Fan Low Voltage FANALM-N Power Unit Black +32 V Yellow Electrical Chassis FANALM-N Cooling Fan Black 1. Upper roller side 1. Upper Roller Side 1 Upper roller 2 Backup roller Between pins “a”...

  • Page 158: Program/Font Rom Layouts

    Program/Font ROM Layouts Print Engine Controller PWB (71K-PWB) 158 / 41316401TH Rev.4...
  • Page 159 Main Controller PWB PUIF PCICU CENT Note! The option SDRAM DIMMs 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).
  • Page 160 LED Control PWB (Y71-PWB) (4) Duplex Control PWB (V71-PWB) Control Panel PWB (X71-PWB) 160 / 41316401TH Rev.4...
  • Page 161 N71-PWB JODEN Entrance Sensor PWB (R71-PWB) INSNS2 INSNS1 WRSNS (8) Paper Size Sensing PWB (PXC-PWB) CN11 161 / 41316401TH Rev.4...

  • Page 162: Parts List

    PARTS LIST 39, 40 Figure 8-1-1/3 162 / 41316401TH Rev.4...
  • Page 163 Figure 8-1-2/3 163 / 41316401TH Rev.4...
  • Page 164 Figure 8-1-3/3 164 / 41316401TH Rev.4...

  • Page 165: Main Assembly

    Table 8-1-1/3 Main Assembly Recommended Q’ty/Year Patrs No. Name Q’ty Remarks /Unit 1000 2000 40864601 Front Cover Assy 41042501 Front Cover Inner Baffle 40866701 Cassette Assy 41438401 Retard Pad Assy 40864301 Rear Cover 41374902 Face Up Stacker Assy 40864401 Left Side Cover 40864501 Right Side Cover 40862001...
  • Page 166 Table 8-1-2/3 Recommended Q’ty/Year Patrs No. Name Q’ty Remarks /Unit 1000 2000 41304105 ID-Y 41304106 ID-M 41304107 ID-C 41304108 ID-K 41304109 ID-Y OEL/APS 41304110 ID-M OEL/APS 41304111 ID-C OEL/APS 41304112 ID-K OEL/APS 41304205 Toner-Cartridge_Type_C2_Y (10K) 41304206 Toner-Cartridge_Type_C2_M (10K) 41304207 Toner-Cartridge_Type_C2_C (10K) 41304208 Toner-Cartridge_Type_C2_K (10K) 41304209...
  • Page 167 Table 8-1-3/3 Recommended Q’ty/Year Patrs No. Name Q’ty Remarks /Unit 1000 2000 41377401 Plate-Indicator 41356009 PCB Assy-CRM 8164323M0000 EEPROM(CU) 41469503 Board-TNY 41437418 Board-Memory 64MB 1200dpi-ODA 41437414 Board-Memory 64MB 1200dpi-OEL 41437410 Board-Memory 64MB 1200dpi-APS 41437419 Board-Memory 128MB 1200dpi Duplex-ODA 41437415 Board-Memory 128MB 1200dpi Duplex-OEL 41437411 Board-Memory 128MB...
  • Page 168 Figure 8-2 168 / 41316401TH Rev.4...

  • Page 169: Top Cover Assembly

    Table 8-2 Top Cover Assembly Recommended Q’ty/Year Parts No. Name Q’ty Remarks /Unit 1000 2000 40859701 Top Cover 41072401 LED Assy (1200dpi) 41072402 LED Assy (600dpi) 40861001 LED Assy Spring 41257901 LED Control PWB (Y71) 40365404 Stacker Full Sensor 41316501 Top Cover Inner Frame Kit 41309603 LED Harness M...
  • Page 170 Figure 8-3-1/2 170 / 41316401TH Rev.4...
  • Page 171 Figure 8-3-2/2 171 / 41316401TH Rev.4...
  • Page 172 Table 8-3-1/2 Printer Unit Chassis Recommended Q’ty/Year Parts No. Name Q’ty Remarks /Unit 1000 2000 41189701 Drum contact Assy 40844301 Registration Roller Assy (A) 40844303 Registration Roller Assy (B) 40845401 Registration Drive Gear 41187101 Registration Clutch 40845801 Registration Motor Assy 3PB4076-5290P001 Main Cooling Fan 41346801...
  • Page 173 Table 8-3-2/2 Recommended Q’ty/Year Parts No. Name Q’ty Remarks /Unit 1000 2000 40846001 Main Feeder Drive Motor 40848501 Main Feeder Drive Gear A 40848601 Main Feeder Drive Gear B 41303601 Left Plate Assy 40850201 Contact Assy 40737401 Power-Unit AC-DC-switching(115V) 40737501 Power-Unit AC-DC-switching(230V) 40737601 Power-Unit (high-voltage)
  • Page 174 C’ C’ Figure 8-4 174 / 41316401TH Rev.4...
  • Page 175 Table 8-4 Paper Tray Guide Recommended Q’ty/Year Parts No. Name Q’ty Remarks /Unit 1000 2000 40839801 Main Feed Assy 40371301 Feed Roller 40313201 Nudger Roller 40325401 Main Feeder Drive Gear 40839001 Left Cassette Guide Assy 40839401 Right Cassette Guide Assy 40349701 Plastic Roller 40368304...
  • Page 176 Figure 8-5 176 / 41316401TH Rev.4...
  • Page 177 Table 8-5 Duplex Unit Recommended Q’ty/Year Parts No. Name Q’ty Remarks /Unit 1000 2000 41305301 Duplex Transport Assy 4PB4043-4718P001 Screw (SP3 10) 4PB4083-2500P010 Screw (T3 10) 4PB4083-2500P008 Screw (T3 8) 4PB4013-3100P006 Screw (M3 6) 41372901 Duplex Unit 41372903 Duplex Unit 41372907 Duplex Unit 177 /...

  • Page 178: Appendix A Centronics Parallel Interface

    APPENDIX A CENTRONICS PARALLEL INTERFACE Connector • Printer Side: 36-pin receptacle (female) Equivalent of type 57RE-40360-830B-D29 (made by Daiichi Denshi Kogyo) • Cable Side: 36-pin plug (male) Equivalent of type 57-30360 (made by Daiichi Denshi Kogyo) Equivalent of plug 552274-1 (AMP), 52073-1 (AMP) Cable •...
  • Page 179 A list of Parallel I/F Signals Pin No. Signal Name Signal Direction Function DATA STROBE Parallel data sampling strobe DATA BIT - 1 DATA BIT - 2 DATA BIT - 3 DATA BIT - 4 Parallel input data DATA BIT - 5 DATA BIT - 6 DATA BIT - 7 DATA BIT - 8...
  • Page 180 Signal Levels • Low Level: 0V to +0.8V • High Level: +2.4V to +5.0v Specifications Item Description Mode Compatibility mode, Nibble mode, ECP mode Data Bit Length Compatibility: 8, Nibble: 4, ECP: 9 bits Control Initial connection control in each mode. Storing of data from host in receive buffer.
  • Page 181 c) Off-line Timing for switching to on-line by on-line SW ON-LINE SW BUSY SELECT ACKNOWLEDGE d) nlnit timing (under enabling input prime signal) * By menu setting 50 s min. INPUT. PRIME BUSY SELECT 5 s max. ACKNOWLEDGE Nibble Mode IEEE-1284-specification compliant ECP Mode IEEE-1284-specification compliant...

  • Page 182: Appendix B 2Nd/3Rd Tray Maintenance

    APPENDIX B 2ND/3RD TRAY MAINTENANCE Parts Replacement 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 cover idle roller Assy 5. 182 / 41316401TH Rev.4...
  • Page 183 (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 the board 4. 183 / 41316401TH Rev.4...
  • Page 184 Feeder Drive Assy (1) Remove the four screws 1, six screws 2 and the 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 0. (4) Unscrew the two screws A to remove the core B and the connector C.
  • Page 185 C7000 2nd/3rd Tray PARTS LIST 185 / 41316401TH Rev.4...
  • Page 186 Table 2-1 C7000 2nd/3rd Tray Recommended Q’ty/Year Parts No. Name Q’ty Remarks /Unit 1000 2000 41304501 — — — 2nd/3rd Tray 500Sheet Feeder Assembly 41304503 — — — OEL/APS 2nd/3rd Tray 500Sheet Feeder Assembly 41780302 Feeder control PWB 41400502 Cover-Front OP Assy 41462301 Lower Connector W/harness 41462201...

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