Page 1: Service Manual
C7000 Series Color LED Page Printer SERVICE MANUAL 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 Series of printers, see its user documentation.
Page 2: Table Of Contents
Table of Contents Page Service Guide - C7000 Series Preface 1 Specifications 1.1 System Configuration 1.2 Printer Configuration 1.3 Option Configuration 1.4 Specifications 2 Operation 2.0 Operation 2.1 Main board (CRM PWB) 2.2 Engine Controller Board (K71 PWB) 2.3 Power Units 2.4 Mechanical Processes ..2.4.1 Electrphotographic process ..(1) Electrophotographic processes...
Page 3 Table of Contents Page 3.0 Precaution in Replacing Parts 3.1 Precaution in Replacing Parts 3.2 Parts Layout ..Top Cover Assy ..Printer Unit ..Cassette Guide Assy (L), (R) ..Duplex Unit 3.3 Replacing Parts ..3.3.1 Top Cover ..3.3.2 LED Assy / LED Assy Spring ..3.3.3 Top Cover Unit ..3.3.4 Control Panel Assy / Control Panel Bezel / LED Control PWB / Toner Sensors / Stacker Full Sensor / Control Panel /...
Page 4 Table of Contents Page ..3.3.32 Fuser Latching Handle (R) ..3.3.33 Main Motor Assy ..3.3.34 Main Feeder Drive Motor ..3.3.35 Contact Assy / Left Plate Assy ..3.3.36 Low Voltage Power Supply ..3.3.37 High Voltage Power Supply ..3.3.38 Main Feed Assy ..3.3.39 Cassette / Left Guide Assy ..3.3.40 Cassette / Right Guide Assy ..3.3.41 Fuser Unit ..3.3.42 Belt Unit...
Page 5 Table of Contents Page 6 Troubleshooting Procedures 6.1 Before Troubleshooting 6.2 Checking before Troubleshooting Image Problems 6.3 Precautions in Troubleshooting Image Problems 6.4 Preparation for Troubleshooting 6.5 Troubleshooting ..6.5.1 LCD messages list ..Table 6-1-1 Operator Alarms (1/2) ..6.5.2 LCD Preparation for Troubleshooting ..(1) The printer does not operate properly after power-on.
Page 6 Table of Contents Page Top Cover Assembly - Table 8-2 Printer Unit Chassis Figure 8-3 Printer Unit Chassis - Table 8-3 Paper Tray Guide - Figure 8-4 Paper Tray Guide - Table 8-4 Duplex Unit - Figure 8-5 Duplex Unit - Table 8-5 Centronics Parallel Interface B 2nd/3rd Tray Maintenance 1.
Page 7: Preface
The descriptions in this manual are subject to change without prior notice. 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 modifications to the printers which are made by users using the manual.
Page 8: Specifications
Service Guide - C7000 Series Page: 2 Chapter 1 Specifications 1.1 System Configuration Figure 1-1 shows the system configuration of the C7000 Series of printers.
Page 11: Printer Configuration
Service Guide - C7000 Series Page: 3 Chapter 1 Specifications 1.2 Printer Configuration The inside of the printer is composed of the following: 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.
Page 14: Option Configuration
Service Guide - C7000 Series Page: 4 Chapter 1 Specifications 1.3 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...
Page 16: Specifications
Monochrome: 20 pages per minute (Transparency: 12 pages per minute) Postal Card, Label, Thick Paper: 8 pages per minute Resolution (C7200) = 600 × 600 -//- (C7400) 1200 x 1200 dots per inch Power Input 100VAC ±10% Power Consumption...
Page 17 Non-operating 10 to 90 26.8 Power off Storage 10 to 90 Delivery 10 to 90 (13) Printer Life 600,000 pages (on a A4-size basis) or five years Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 18: Operation
Service Guide - C7000 Series Page: 6 Chapter 2 Operation 2.0 Operation 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.
Page 21: Main Board (Crm Pwb)
Service Guide - C7000 Series Page: 7 Chapter 2 Operation 2.1 Main board (CRM PWB) Figure 2-2 provides the block diagram of the main control board (CRM PWB).
Page 23 The CPU is PowerPC750, a 64-bit bus RISC processor, which inputs an 80-MHz CLK (=BUS CLK), and operates at 400MHz that is five times the input. Secondary Cache SRAM SRAM is included as secondary cache of the CPU on the board. ROM is to be inserted into the three 168 pin DIMM slots.
Page 25: Engine Controller Board (K71 Pwb)
Service Guide - C7000 Series Page: 8 Chapter 2 Operation 2.2 Engine Controller Board (K71 PWB)
Page 27 EEPROM, pulse motor drivers and a video memory (see Figure 2-4). (1) CPU This, a 16-bit CPU with an AD converter containing 126-Kbyte ROM (OKI MSM66Q577), controls the entire system. (2) General LSI This LSI (MG63P011-001LA), which is contained in the printer engine control block, has 4 Mbits of video memory, and functions such as controller-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.
Page 28: Power Units
-100 to 400V/ +300V Voltage to developing roller Y, M, C, and K: Voltage to toner supply roller -100V to -700V 0Kv to 7KV Voltage to transfer roller Variable Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 29: Mechanical Processes
Service Guide - C7000 Series Page: 10 Chapter 2 Operation 2.4 Mechanical Processes Figure 2-4 shows the mechanical processes of the C7000 Series of printers.
Page 32: Electrphotographic Process
Service Guide - C7000 Series Page: 11 Chapter 2 Operation 2.4.1 Electrphotographic process Electrophotographic processes Charging Exposure Developing Transfer Fusing Cleaning - waste toner area Cleaning - transfer belt Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 33 - The cleaning blade removes residual toner from the OPC drum after the transfer. (6) Fusing - The toner image on the paper is fused into place through the application of heat and pressure to it. Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 34 Service Guide - C7000 Series Page: 13 Chapter 2 Operation (2) Charging 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. All rights reserved.
Page 35 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. Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 36 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. Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 37 Applying positive high voltage from the power supply to the transfer roller moves the positive charge induced by the transfer roller to the paper surface at the contact portion between the transfer roller and the paper, the paper surface drawing the negatively charged toner from the drum surface. Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 38 For safety, a thermostat is provided and, when the heat roller temperature rises by a fixed degree or more, becomes open to cut off voltage supply to the heater. The backup roller is being pressed against the heater by the pressure springs on both sides. Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 39: Cleaning - Waste Toner Area
(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, Okidata, Division of OKI America, Inc. All rights reserved.
Page 40: Cleaning - Transfer Belt
(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, Division of OKI America, Inc. All rights reserved.
Page 41: Paper Running Process
Service Guide - C7000 Series Page: 20 Chapter 2 Operation 2.4.2 Paper running process Figure 2-5 shows the traveling of paper in the C7000 Series of printers.
Page 43: Paper Feed From Tray
Service Guide - C7000 Series Page: 21 Chapter 2 Operation (1) 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.
Page 46: Paper Feed From Multi-Purpose Tray (Mt)
Service Guide - C7000 Series Page: 22 Chapter 2 Operation (2) Paper Feed from Multi-Purpose 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 49: Transport Belt
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. Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 50: Driving And Up-And-Down Movements Of I/D Unit
Service Guide - C7000 Series Page: 24 Chapter 2 Operation (4) 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.
Page 54: Fuser Unit And Paper Ejection
Service Guide - C7000 Series Page: 25 Chapter 2 Operation (5) 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.
Page 57: Duplex Unit
Service Guide - C7000 Series Page: 26 Chapter 2 Operation (6) 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.
Page 59: Sensor
Service Guide - C7000 Series Page: 27 Chapter 2 Operation 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 Service Guide - C7000 Series Page: 28 Chapter 2 Operation 2.5.1 Paper related sensors Sensor Function Sensor status Entrance MT sensor Detects the beginning of incoming paper to ON: paper is present. Entrance Cassette determine the timing for switching from hopping to OFF: Paper is absent.
Page 61 ON: paper is present. to determine the paper ejection timing. OFF: Paper is absent. Stacker Full sensor Detects the face-down stacker full of paper. ON: Stacker is full. OFF: Stacker is empty. Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 62 Service Guide - C7000 Series Page: 29 Chapter 2 Operation 2.5.2 Other sensors 1 Paper Empty sensor This sensor checks whether the paper cassette is empty. 2 Paper Near sensor This sensor checks whether the paper cassette is near empty. 3 MT Paper Empty sensor This sensor checks whether paper exists in the front feeder.
Page 63 Upon correction 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 rights reserved.
Page 64: Color Misalignment Correction
A preset pattern to detect color misalignment is printed on the belt. The reflection sensor reads the printed pattern, each color's misalignment value is sensed and its correction value is determined. The correction value is used each color's (Cyan, Magenta and Yellow) writing timing in comparison with that of Black. Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 65: Transfer Control Responds To Environmental Changes
The C7000 Series 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 calculated to perform real-time control on printing with its optimum voltage. Environmental sensing table Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 66: Paper Jam Detection
Service Guide - C7000 Series Page: 32 Chapter 2 Operation 2.8 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 68: Cover-Open
Service Guide - C7000 Series Page: 33 Chapter 2 Operation 2.9 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.
Page 71: Toner Low Detection
Service Guide - C7000 Series Page: 34 Chapter 2 Operation 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.
Page 72 Toner Low Condition The stirring bar reaches its highest 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 measuring the time, a toner low condition is detected.
Page 73 When the toner sensor remains unchanged for more than 15 cycles of 2.3 seconds, the toner sensor alarm is activated. The toner sensor does not perform the detection while the drum motor is not running. Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 74: Page Size Detection
Upon installation of the paper cassette, the microswitch detects the condition of the tab pieces and the paper size is recognized. STATE OF MICROSWITCHES Paper size Letter Executive Legal 14 Legal 13 Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 75: Operation At Power-On
(6) Option unit check Before the printer goes into the operation mode, the presence of the option units (e.g., the HDD, NIC, option trays and duplex unit) is checked. Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 76: Color Misalignment Detection
Service Guide - C7000 Series Page: 37 Chapter 2 Operation 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 79: Version Read Of Units Replaced Periodically
When the fuse is conducting, the unit is decided that it is new. The "new" or "previous" judgment is performed at power-on and at cover-close. The life counter of every new unit is reset and the "new" or "previous" judging purpose fuse in the unit is cut. Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 80: Life Count For Units Replaced Periodically
The count of one is performed every time when one Warning (the unit can still page is passed. be used). End of Life: Time when the counter value reaches 60K. Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 81: Toner Consumption Detection
EEPROM. Upon detection of toner low, the amount used is forcedly set to 8%. After that, when the equivalent of pages of 1K on A4 and 5% duty is reached, toner-empty occurs and the printing stops. Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 82: Precaution In Replacing Parts
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. 3.1 Precautions in Replacing Parts 3.2 Parts layout 3.3 Replacing Parts Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 83 Service Guide - C7000 Series Page: 42 Chapter 3 Disassembly 3.1 Precaution in Replacing Parts Before starting parts replacement, remove the AC cable and interface cable. (a) Removing the AC cable i) Turn off ("o") the power switch of the printer. ii) Disconnect the AC inlet plug of the AC cable from the AC receptacle.
Page 84 No. 2-200 Philips 3-5 mm screws screwdriver, Magnetized No. 3-100 screwdriver No. 5-200 screwdriver Digital multimeter Pliers Handy cleaner LED Head cleaner Cleans LED P/N 51802901 head Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 85 Service Guide - C7000 Series Page: 43 Chapter 3 Disassembly 3.2 Parts Layout...
Page 88 Service Guide - C7000 Series Page: 44 Chapter 3 Disassembly Top Cover Assy...
Page 91 Service Guide - C7000 Series Page: 45 Chapter 3 Disassembly Printer Unit [Printer Unit 1/2]...
Page 93 Printer Unit 2/2]...
Page 96 Service Guide - C7000 Series Page: 46 Chapter 3 Disassembly Cassette Guide Assy (L), (R)
Page 99 Service Guide - C7000 Series Page: 47 Chapter 3 Disassembly Duplex Unit...
Page 102: Replacing Parts
Service Guide - C7000 Series Page: 48 Chapter 3 Disassembly 3.3 Replacing Parts This section described how to replace the parts and assemblies shown in the following disassembling system diagram. 3.3.1 Top Cover 3.3.2 LED assy / LED assy Spring 3.3.3 Top Cover Unit 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...
Page 103: Fuser Latching Handle (R)
3.3.20 Color Registration Sensor Assy 3.3.21 Duplex Guide Assy 3.3.22 Electrical Chassis Cooling Fan 3.3.23 Printer Engine Controller PWB 3.3.24 Printer Unit Chassis 3.3.25 Entrance Cassette Sensor Actuator 3.3.26 Entrance Sensor PWB 3.3.27 Entrance MT Sensor 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)
Page 105 Service Guide - C7000 Series Page: 49 Chapter 3 Disassembly 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 rights reserved.
Page 106 Service Guide - C7000 Series Page: 50 Chapter 3 Disassembly 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 108 Service Guide - C7000 Series Page: 51 Chapter 3 Disassembly 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 111 Service Guide - C7000 Series Page: 52 Chapter 3 Disassembly 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).
Page 113 Service Guide - C7000 Series Page: 53 Chapter 3 Disassembly 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).
Page 116 Service Guide - C7000 Series Page: 54 Chapter 3 Disassembly 3.3.6 Eject Guide Assy (1) Remove the five screws (1) to detach the eject guide assy (2).
Page 119 Service Guide - C7000 Series Page: 55 Chapter 3 Disassembly 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).
Page 121 Service Guide - C7000 Series Page: 56 Chapter 3 Disassembly 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).
Page 124 Service Guide - C7000 Series Page: 57 Chapter 3 Disassembly 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 (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. Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 128 Service Guide - C7000 Series Page: 59 Chapter 3 Disassembly 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 Service Guide - C7000 Series Page: 60 Chapter 3 Disassembly 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).
Page 132 Service Guide - C7000 Series Page: 61 Chapter 3 Disassembly 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 cover (5).
Page 135: Multi-Purpose Tray Assy / Links
Service Guide - C7000 Series Page: 62 Chapter 3 Disassembly 3.3.14 Multi-purpose Tray Assy / Links 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).
Page 137: Drum Contact Assys
Service Guide - C7000 Series Page: 63 Chapter 3 Disassembly 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).
Page 139: Registration Roller Assy (A) / Registration Drive Gear
Service Guide - C7000 Series Page: 64 Chapter 3 Disassembly 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).
Page 141: Registration Roller Assy (B)
Service Guide - C7000 Series Page: 65 Chapter 3 Disassembly 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).
Page 144: Registration Clutch And Registration Motor Assy
Service Guide - C7000 Series Page: 66 Chapter 3 Disassembly 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). (4) Remove the connector to remove the two screws (5) and the registration motor Assy (6).
Page 146: Main Cooling Fan
Service Guide - C7000 Series Page: 67 Chapter 3 Disassembly 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.
Page 148: Color Registration Sensor Assy
Service Guide - C7000 Series Page: 68 Chapter 3 Disassembly 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).
Page 151: Duplex Guide Assy
Service Guide - C7000 Series Page: 69 Chapter 3 Disassembly 3.3.21 Duplex Guide Assy (1) Unlatch and demount the duplex guide (1).
Page 154: Electrical Chassis Cooling Fan
Service Guide - C7000 Series Page: 70 Chapter 3 Disassembly 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).
Page 156 (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). Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 157: Printer Unit Chassis
Service Guide - C7000 Series Page: 72 Chapter 3 Disassembly 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).
Page 160: Entrance Cassette Sensor Actuator
Service Guide - C7000 Series Page: 73 Chapter 3 Disassembly 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).
Page 162: Entrance Sensor Pwb
Chapter 3 Disassembly 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 of OKI America, Inc. All rights reserved.
Page 164: Entrance Mt Sensor Actuator And Entrance Belt
Service Guide - C7000 Series Page: 75 Chapter 3 Disassembly 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).
Page 166 Service Guide - C7000 Series Page: 76 Chapter 3 Disassembly 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).
Page 169: Exit Sensor Assy
Service Guide - C7000 Series Page: 77 Chapter 3 Disassembly 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).
Page 172: Fuser Latching Handle (L)
Service Guide - C7000 Series Page: 78 Chapter 3 Disassembly 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).
Page 175: Belt Motor Assy
Service Guide - C7000 Series Page: 79 Chapter 3 Disassembly 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 motor Assy (3).
Page 178 Service Guide - C7000 Series Page: 80 Chapter 3 Disassembly 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).
Page 180 Service Guide - C7000 Series Page: 81 Chapter 3 Disassembly 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).
Page 182 Service Guide - C7000 Series Page: 82 Chapter 3 Disassembly 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).
Page 185 Service Guide - C7000 Series Page: 83 Chapter 3 Disassembly 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).
Page 187 Service Guide - C7000 Series Page: 84 Chapter 3 Disassembly 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).
Page 189 Service Guide - C7000 Series Page: 85 Chapter 3 Disassembly 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).
Page 192 Service Guide - C7000 Series Page: 86 Chapter 3 Disassembly 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).
Page 195 Service Guide - C7000 Series Page: 87 Chapter 3 Disassembly 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. (4) Remove the cassette lift spring (4), then remove the plastic slide (5), the cassette lift arm (L) (6) and the plastic roller (7).
Page 198 Service Guide - C7000 Series Page: 88 Chapter 3 Disassembly 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. (4) Remove the cassette lift spring (4), then detach the plastic slide (5), the cassette lift arm (L) (6) and the plastic roller (7).
Page 201 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 America, Inc. All rights reserved.
Page 202 Service Guide - C7000 Series Page: 90 Chapter 3 Disassembly 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 (3).
Page 204 (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, Okidata, Division of OKI America, Inc. All rights reserved.
Page 205 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 America, Inc. All rights reserved.
Page 207 Service Guide - C7000 Series Page: 93 Chapter 3 Disassembly 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).
Page 210 Service Guide - C7000 Series Page: 94 Chapter 3 Disassembly 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.
Page 211 (3) Removing the CRM Board...
Page 212 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 (10). 3. Unscrew the two screws (11) to remove the guide rail (11) . 4.
Page 215: 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. Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 216: Maintenance Modes And Their Functions
Service Guide - C7000 Series Page: 96 Chapter 4 Adjustments 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 America, Inc. All rights reserved.
Page 217 Service Guide - C7000 Series Page: 97 Chapter 4 Adjustments 4.1.1 Maintenance Menu The following menu category includes the maintenance menu category. The following can be set from this menu. Category Item (1st Line) Value (2nd Functions Line) Maintenance Power Save Mode Enabled Sets the Power Save Mode Menu Disabled...
Page 219: Engine Maintenance Mode
4.1.2.3 Switch scan test 4.1.2.4 Motor and clutch test 4.1.2.5 Test Printing 4.1.2.6 NVM initialization 4.1.2.7 Consumable counter display 4.1.2.8 Consumable counter display - continuous 4.1.2.9 Error Messages and their Details Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 220 Service Guide - C7000 Series Page: 99 Chapter 4 Adjustments 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 America, Inc. All rights reserved.
Page 221 LED Head Test Motor and Clutch Tests Test Pattern Execution NVM Initialization Consumable Counter Display Consumable Counter Display - Continuous 4.1.2.2.1 Entering self-diagnosis mode (level 1) 4.1.2.2.2 Exiting self-diagnosis mode Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 222: Entering Self-Diagnosis Mode (Level 1)
4. Go to each self-diagnosis step by using the 1 11 11 and 5 55 55 keys (pressing 1 11 11 and 5 55 55 keys rotates the menu items). Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 223: Exiting Self-Diagnosis Mode
Chapter 4 Adjustments 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 of OKI America, Inc. All rights reserved.
Page 224: Switch Scan Test
Service Guide - C7000 Series Page: 103 Chapter 4 Adjustments 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) and (5) keys down until "SWITCH SCAN" appears on the upper display (the (1) key increments a test item and the (5) key decrements a test item).
Page 228: Motor And Clutch Test
Service Guide - C7000 Series Page: 104 Chapter 4 Adjustments 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) and (5) keys down until the upper display of "MOTOR & CLUTCH TEST" is brought up (the (1) key increments a test item and the (6) key decrements a test item).
Page 229 Unit Name Display Driving Constraints Constraints Display BLACK-ID MOTOR Remove all the IDs (B, Y, M and C) to drive the unit. REMOVE ID YELLOW-ID MOTOR Remove all the IDs (B, Y, M and C) to drive the unit. REMOVE ID MAGENTA-ID MOTOR Remove all the IDs (B, Y, M and C) to drive the unit.
Page 230 CASSETTE3 FEEDER MOTOR Remove the cassette 3 to drive the unit. EXIT TRAY3 CASSETTE (OPTION) CASSETTE3 ROLLER CLUTCH (OPTION) ID UP/DOWN FAN1 TEST (POWER UNIT FAN) FAN2 TEST (CONTROL BLOCK FAN) Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 231: Test Printing
Service Guide - C7000 Series Page: 105 Chapter 4 Adjustments 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) and (5) keys down until "TEST PRINT" comes into view in the upper display (the (1) key is for test item increment and the (5) key for test item decrement).
Page 232 A value in the shaded section is initial. The set values are applicable only to this test mode (No writing into EEPROM is performed.) When the (3) key is pressed, with "PRINT EXECUTE" on the lower display after step 2, the test printing is executed using the values designated in steps 2 and 3.
Page 233 To suspend test printing, press Key 7 77 77. 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. (For error details, see Sec. 4.1.2.9 Error Messages and their Details.) Print Patterns: Patterns 0, 8 ~15: Blank paper output...
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: Nvm Initialization
Service Guide - C7000 Series Page: 106 Chapter 4 Adjustments 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) and (5) keys until "NV-RAM INITIAL" appears on the upper display (the (1) key is for test item increment and the (5) key for test item decrement).
Page 238 Point y-axis (Right) Magenta LED value for the LED head inch Cyan LED (Yellow/Magenta/Cyan). Engine Parameter Initializes all the items that have been set using levels 2 and 3. Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 239: Consumable Counter Display
Cyan ID Unit CYAN ID UNIT ******** IMAGES Image Black Toner BLACK TONER ***% Yellow Toner YELLOW TONER ***% Magenta Toner MAGENTA TONER ***% Cyan Toner CYAN TONER ***% Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 241: Consumable Counter Display - Continuos
Yellow Impressions YELLOW ******** IMAGES Image a count in letter paper IMPRESSIONS sheets to set it. Magenta MAGENTA ******** IMAGES Image Impressions IMPRESSIONS Cyan Impressions CYAN ******** IMAGES Image IMPRESSIONS Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 242: Error Messages And Their Details
Service Guide - C7000 Series Page: 109 Chapter 4 Adjustments 4.1.2.9 Error Messages and their Details Error Message Details BLACK DRUM UP/DOWN ERROR Black ID up/down error BLACK DRUM UNIT FUSER CUT ERROR Black ID unit fuse cut error BLACK TONER SENSOR ERROR Black toner sensor error BLACK LED HEAD ERROR Black LED head error...
Page 243 EEPROM SUM CHECK ERROR EEPROM sum check error EEPROM TIMEOUT EEPROM timeout error ENV TEMP SENSOR ERROR ENV TEMP sensor error ENGINE LIFE OVER Engine life error F/W LOST CONTROL F/W has lost its control FRONT FEEDER STAGE POSITION Front feeder stage position error FRONT COVER OPEN Front cover is open FUSER LIFE OVER...
Page 244 JAM DUPLEX REVERSAL Duplex unit reversal jam LOWER HEATER LOW TEMPER Lower heater low-temperature error LOWER HEATER HIGH TEMPER Lower heater high-temperature error LOWER HEATER OPEN ERROR Lower heater thermistor open-circuit error LOWER HEATER SHORT ERROR Lower heater thermistor short-circuit error LED HEAD OVER HEAT LED head overheat error LEFT LOWER COVER OPEN...
Page 245 PAPER NEAR END TRAY1 Paper is going out in Tray1 PAPER NEAR END TRAY2 Paper is going out in Tray2 PAPER NEAR END TRAY3 Paper is going out in Tray3 PAPER NEAR END FRONT FEEDER Paper is going out at Front Feeder PAPER NEAR END TRAY4 (PX703) Paper is going out in Tray4 PAPER NEAR END TRAY5 (PX703)
Page 246 Tray4 hopping error INFEED: TRAY5 (PX703) Tray5 hopping error INPATH --- Information of paper that stays on the paper path INFEED --- Information of paper that stays at the paper entrance Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 247: Crm Board Adjustments
EEPROM Initialization To initialize the EEPROM, enter the maintenance mode and select the EEPROM RESET item after the general start-up. 4.1.3.1 Short plug settings 4.1.3.2 Printings singly using controller-equipped printer Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 248 Configures the banks of the ROM DIMM slot B. (1-2 Short: For 1-Bank DIMM; 2-3 Short: For 2-Bank DIMM) A 1-bank DIMM (dual-sided 1 bank) is only a prototype and, in production-run printers, does not exist. Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 249: Printing Menu Reports
Service Guide - C7000 Series Page: 112 Chapter 4 Adjustments 4.1.3.2 Printing Menu Reports Menu Map Printing The program versions, the controller block configuration and other configurations and settings of the printer are printed. Operation: (Press of Switches) Without HDD: "0" --> "3" --> "3" With HDD: "0"...
Page 251: Adjustments After Parts Replacement
When the EEPROM of the PU (K71 Board) is replaced to a new one, color balance must be adjusted. 4.2.1 Precautions in replacing engine controller board 4.2.2 Precautions in replacing EEPROM 4.2.3 EEPROM replacement after CRM board replacement Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 252 When the "SERVICE CALL XX" (an engine EEPROM error) message is displayed on the operator panel, the EEPROM must be replaced with new one. In this case, perform the operation described in Section 4.2.2. Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 253 Service Guide - C7000 Series Page: 115 Chapter 4 Adjustments 4.2.2 Precautions in replacing EEPROM When the EEPROM is not removed from the board and placed on the new board at the time of (engine controller board (71K PWB)) replacement, or when the EEPROM is replaced with new one, the version read (fuse cut) function shown in Section 2.14 is disabled.
Page 254 Black Impressions Total number of Pages The number of pages printed after the Cyan Impressions Printed installation of a new ID unit. Magenta Impressions Yellow Impressions Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 255 When the user's EEPROM is unusable due to its problem, use the new one on the new board, where the destination of the new board must be set. See Section 4.1.3 "CRM board adjustments" for the setting procedure. Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 256 Service Guide - C7000 Series Page: 117 Chapter 4 Adjustments 4.3 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.
Page 258: Period Maintenance
Service Guide - C7000 Series Page: 118 Chapter 5 Period Maintenance 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 America, Inc. All rights reserved.
Page 259 UNIT" is displayed. Transfer Belt Unit Belt Unit Time when 60,000 pages are None "CHANGE BELT UNIT" printed. is displayed. Note: The above periodical parts replacement is performed by users. Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 260 Clean 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 connector. Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 261 Caution! Be sure to use the LED head cleaner to clean the LED lens array (The LED head cleaner is packed together with the toner cartridge. White belt, White line (Void, Light area) Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 262 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, Division of OKI America, Inc. All rights reserved.
Page 263: Before Troubleshooting
(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 problems occurred. Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 264: Checking Before Troubleshooting Image Problems
(2) Have the consumables (toner, drum cartridges) been properly replaced? (3) Is the correct media being used? Refer to the media specification. (4) Are the image drum cartridges correctly installed? Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 265: Precautions In Troubleshooting Image Problems
(3) Do not touch the fuser unit with hands as it is hot. (4) Do not expose the image drums to light for five minutes or more at room temperature. Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 266: Preparation For Troubleshooting
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 appeared on the LCD. Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 267: Lcd Messages List
Service Guide - C7000 Series Page: 127 Chapter 6 Troubleshooting Procedures 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 OKI America, Inc. All rights reserved.
Page 268: Table 6-1-1 Operator Alarms (1/2)
While a service call appears, an error code accompanied by its error information is shown on the lower LCD. Error codes, their meanings and actions to be taken are listed in Table 6-1-1. Table 6-1-1 Operator Alarms (1/2) Table 6-1-1 Operator Alarms (2/2) Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 269 Service Guide - C7000 Series Page: 129 Chapter 6 Troubleshooting Procedures Table 6-1-1 Operator Alarms (1/2) Message Cause Error Description Solutions Service Call CPU Exception Is the error message displayed again? Turn the printer off/on. 001: Error Is the error message displayed again? Replace the CRM board.
Page 270 Replace the CRM board. (The EEPROM needs replacement). Service Call Is the installation order followed? Correct the installation 034: Error Configuration order. Replace the RAM Error. The CU Can the printer recover from the error DIMMs. Replace the RAM installation by replacing the RAM DIMMs? CRM board.
Page 271 board. (The EEPROM needs replacement). Service Call U Flash Error. Does the error message appear again? Yes Replace the CRM 041: Error On-CU-board board. (The EEPROM Flash ROM Error needs replacement). Service Call Operator Panel Does the error message appear again? Yes See the flowchart for 050: Error Error...
Page 272 Service Call: Inappropriate 1) Is the error message displayed? Turn off/on the printer. 124 Error ambient temp. 2) Does the error repeat? Replace the detected by a temperature sensor. sensor. Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 273: Lcd Preparation For Troubleshooting
Service Guide - C7000 Series Page: 130 Chapter 6 Troubleshooting Procedures 6.5.2 LCD Preparation for Troubleshooting 1) 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 Number...
Page 275: The Printer Does Not Operate Properly After Power-On
Service Guide - C7000 Series Page: 131 Chapter 6 Troubleshooting Procedures (1) The printer does not operate properly after power-on.
Page 278: Paper Loading Jam (Multi-Purpose Tray)
Chapter 6 Troubleshooting Procedures (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 of OKI America, Inc. All rights reserved.
Page 279 Service Guide - C7000 Series Page: 133 Chapter 6 Troubleshooting Procedures (2)-1 Paper Loading Jam (1st Tray)
Page 282: Paper Loading Jam (Multi-Purpose Tray)
Service Guide - C7000 Series Page: 134 Chapter 6 Troubleshooting Procedures (2)-2 Paper Loading Jam (Multi-Purpose Tray)
Page 284: Paper Feed Jam
Service Guide - C7000 Series Page: 135 Chapter 6 Troubleshooting Procedures (2)-3 Paper feed jam...
Page 287: Paper Exit Jam
Service Guide - C7000 Series Page: 136 Chapter 6 Troubleshooting Procedures (2)-4 Paper Exit Jam...
Page 290: Duplex Jam
Service Guide - C7000 Series Page: 137 Chapter 6 Troubleshooting Procedures (2)-5 Duplex Jam...
Page 293: Paper Size Error
Service Guide - C7000 Series Page: 138 Chapter 6 Troubleshooting Procedures (3) Paper Size Error...
Page 296: Image Drum Unit Up/Down Operation Error
Service Guide - C7000 Series Page: 139 Chapter 6 Troubleshooting Procedures (4) Image Drum Unit (ID) Up-and-Down Operation Error Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 297: Fusing Unit Error
Service Guide - C7000 Series Page: 140 Chapter 6 Troubleshooting Procedures (5) Fusing Unit Error...
Page 300: Troubleshooting Image Problems
Service Guide - C7000 Series Page: 142 Chapter 6 Troubleshooting Procedures 6.5.3 Troubleshooting image problems When the printout images are not satisfactory, follow the troubleshooting steps listed below. Printout 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)
Page 302 Service Guide - C7000 Series Page: 143 Chapter 6 Troubleshooting Procedures (1) Light or Faded Image on Whole Page, or Color Misalignment on Whole Page (Figure 6-2 A)
Page 305: Dirty Background (Figure 6-2 B)
Service Guide - C7000 Series Page: 144 Chapter 6 Troubleshooting Procedures (2) Dirty Background (Figure 6-2 B)
Page 308: Blank Page (Figure 6-2 C)
Service Guide - C7000 Series Page: 145 Chapter 6 Troubleshooting Procedures (3) Blank Page (Figure 6-2 C)
Page 311 Service Guide - C7000 Series Page: 146 Chapter 6 Troubleshooting Procedures (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 rights reserved.
Page 313: Vertical White Belt Or Line, Or Uneven-Color Belt Or Line (Figure
Service Guide - C7000 Series Page: 147 Chapter 6 Troubleshooting Procedures (5) Vertical White Belt or Line, or Uneven-Color Belt or Line (Figure 6-2 F)
Page 315: Poor Fusing (Ink Spreads Or Peels When Touched With Fingers)
Service Guide - C7000 Series Page: 148 Chapter 6 Troubleshooting Procedures (6) Poor Fusing (Ink spreads or peels when touched with fingers)
Page 318: Defective Image Of Regular Interval (Figure 6-2 E)
Transfer Roller Replace the belt Assy Note! The life counters of the I/D units, fuser unit and belt cassette unit are automatically reset upon replacement of the units, respectively. Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 319: Missing Image
Service Guide - C7000 Series Page: 150 Chapter 6 Troubleshooting Procedures (8) Missing Image...
Page 322: Color Misalignment
Service Guide - C7000 Series Page: 151 Chapter 6 Troubleshooting Procedures (9) Color Misalignment...
Page 327: Color Different From Original One
Service Guide - C7000 Series Page: 152 Chapter 6 Troubleshooting Procedures (10) Color Different from Original One...
Page 331: Wiring Diagram 7.1 Resistance Check
Service Guide - C7000 Series Page: 154 Chapter 7 Wiring Diagram 7.1 Resistance Check...
Page 337: Program/Font Rom Location
Service Guide - C7000 Series Page: 155 Chapter 7 Wiring Diagram 7.2 Program/Font ROM Location (1) Printer Engine Controller PWB (71K-PWB)
Page 339 (2) Main Controller PWB...
Page 341 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). (3) LED Control PWB (Y71-PWB) (4) Duplex Control PWB (V71-PWB)
Page 342 (5) Control Panel PWB (X71-PWB) (6) N71-PWB (7) Entrance Sensor PWB (R71-PWB)
Page 344 Service Guide - C7000 Series Page: 156 Chapter 8 Parts List Main Assembly - Figure 8-2...
Page 346 Figure 8-1-1/3...
Page 349: Main Assembly - Table 8-1 (1/3)
Service Guide - C7000 Series Page: 157 Chapter 8 Parts List Main Assembly - Table 8-1 (1/3) Part # Name Remarks 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...
Page 351: Main Assembly - Table 8-1 (2/3)
Image Drum - Magenta 41304107 Image Drum - Cyan 41304108 Image Drum - Black 41304205 Toner - Yellow 41304206 Toner - Magenta 41304207 Toner - Cyan 41304208 Toner - Black Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 352: Main Assembly - Table 8-1 (3/3)
Plate Shield 41278601 Guide - Rail (A) 41278701 Guide - Rail (B) 41410201 Motor - Fan 41467401 Plate - FG (Centro) 41254601 Plate - Blank 41278401 Screw 41723901 Screw Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 353 Service Guide - C7000 Series Page: 160 Chapter 8 Parts List Top Cover Assembly - Figure 8-2...
Page 356 Control Panel Assy 40866201 Control Panel Bezel (600 dpi) 600 dpi 40866202 Control Panel Bezel (1200 dpi) 1200 dpi 40861501 Eject Guide Assy 26 pin LED Connector Screw (T3x8) Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 357 Service Guide - C7000 Series Page: 162 Chapter 8 Parts List Printer Unit Chassis Figure 8-3...
Page 362 Service Guide - C7000 Series Page: 163 Chapter 8 Parts List Printer Unit Chassis - Table 8-3 Part # Name Remarks 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...
Page 363 Power - Unit AC - DC switching (230V) 40737601 Power - Unit (high-voltage) HV Tape Harness 41128101 Power Supply Insulator Screw (M3x6) Screw (M4x8) 41346301 Transfer Contact Assy 41469001 Power Cooling Fan Screw (T3x8) Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 364 Service Guide - C7000 Series Page: 164 Chapter 8 Parts List Paper Tray Guide - Figure 8-4...
Page 367 Right Cassette Guide Assy 40349701 Plastic Roller 40368304 Paper Size Sensing PWB PXC Paper Size Actuator 41309301 2nd Tray Connector Foot Screw (T3x8) Screw (T4x10) 41275901 Front Cover Open Switch Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 368 Service Guide - C7000 Series Page: 166 Chapter 8 Parts List Duplex Unit - Figure 8-5...
Page 371 Page: 167 Chapter 8 Parts List Duplex Unit - Table 8-5 Part # Name Remarks 41305301 Duplex Transport Assy Screw (SP3x10) Screw (T3x10) Screw (T3x8) Screw (M3x6) 70037201 Duplex Unit Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 372: Centronics Parallel Interface
Service Guide - C7000 Series Page: 168 Chapter A Centronics Parallel Interface Centronics Parallel Interface 1) Connector Printer side : 36-pin receptacle (single port) Type 57RE-40360-830B-D29A (made by Daiichi Denshi), or equivalent Cable side : 36-pin plug Type 57-30360 (made by Daiichi Denshi) or equivalent Plug-552274-1 (AMP), 552073-1 (AMP) or equivalent 2) Cable Cable length :...
Page 374 Connector pin arrangement 4) Signal Level LOW : 0 V to +0.8 V HIGH : +2.4 V to 5.0 V 5) Specifications Item Description Mode Compatibility 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.
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 (when set to the effective INPUT PRIME signal) Nibble mode Conforms to IEEE 1284 specification compliant ECP mode Conforms to IEEE 1284 specification compliant Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Page 377: B 2Nd/3Rd Tray Maintenance 1. Parts Replacement
Service Guide - C7000 Series Page: 169 Chapter B 2nd/3rd Tray Maintenance 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 reserved.
Page 378: Cover Idle Roller Assy
Service Guide - C7000 Series Page: 170 Chapter B 2nd/3rd Tray Maintenance 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 cover idle roller Assy (5).
Page 380 Service Guide - C7000 Series Page: 171 Chapter B 2nd/3rd Tray Maintenance 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 the board (4).
Page 382: Feeder Drive Assy
Service Guide - C7000 Series Page: 172 Chapter B 2nd/3rd Tray Maintenance 1.3 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 (10).
Page 385: C7000 2Nd/3Rd Tray Parts List
Service Guide - C7000 Series Page: 173 Chapter B 2nd/3rd Tray Maintenance 2. C7000 2nd/3rd Tray Parts List...
Page 388: Table 6-1-1 Operator Alarms (2/2)
Page: 174 Chapter 6 Troubleshooting Procedures Table 6-1-1 Operator Alarms (2/2) Message Cause Error Description Solutions Service Call Error detected at 1) Is the error message displayed? Turn off/on the printer. 125: Error the MT home 2) Does the error repeat? Replace the MT.
Page 389 Service Call 172: High temperature 1) Is the error message displayed? Turn off/on the printer. Error error detected at 2) Does the error repeat? Replace the Thermistor 176: Error Thermistor. and turn off the printer. Leave it for 30 mins. Service Call 173: Low temperature 1) Is the error message displayed?
Page 390 paper reverse in Duplex unit, or replace the Duplex unit. Check DUPLEX Paper jam 1) Is a paper jammed in the Duplex Remove the paper jam. 371: Paper Jam detected at the unit? Check the Duplex unit, Duplex unit or replace it. Check DUPLEX Paper jam 1) Does misfeed occur in the Duplex...
Page 391 Check the Paper near end sensor. Disc Operation HDD can not be Is the operating procedure correct? Confirm the procedure Error written. in the manual. Replace the HDD as it is broken. Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.

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