Detailed instructions for use are in the User's Guide.
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Service Guide OKIPAGE4w
Chapter 0 General Manual Information
OKIDATA OKIPAGE4w LED Page Printer Service Manual
Adobe Acrobat printable reference copy of the OKIDATA Service Training Manual. 09/17/97
Note: This Adobe Acrobat version of the Okidata Service Training Manual was built with the pictures rendered at 300 dpi, which is ideal for printing, but does not view on most displays well.
Okidata is a registered trademark, and OkiPage is a trademark of Oki Electric Industry Co., Ltd. HP, LaserJet and PCL5e are trademarks of Hewlett-Packard Co. Adobe and Acrobat are trademarks of Adobe Systems Incorporated. Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Table of Contents
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Service Guide OKIPAGE4w
0 General Manual Information Front Cover Preface 1 Configuration CONFIGURATION Printer Configuration Specification Safety Standards - Certification Label ....Warning Label 2 Operation Description OPERATION DESCRIPTION Main Control Board Power Supply Unit High-Voltage Power Supply Board Electro-Photographic Processor Electro-Photographic Process ....Explanation of Each Operation - Hopping ....Printing and warm-up ....Charging ....Exposure ....Development ....Transfer ....Fusing ....Cleaning Paper Jam Detection Toner Low Detection Cover Open 3 Parts Replacement Parts Replacement Precautions for Parts Replacement Parts Layout ....Base Frame Unit ....Base Plate Unit Replacing Parts ....Extend Plate ....LED Head and Head Spring ....Transfer Roller ....Upper Cover Assy ....High-Voltage Power Supply Board ....Top Cover Assy and Flat Cable Assy ....Paper Holder ....Side Plate M and Idle Gear ....Registration Roller ....Eject Roller Shaft and Eject Roller ....Fuser Assy ....Pressure Roller B (Back Up Roller) ....Separator Guide ....Pulse Motor (Main) ....Hopping Shaft Assy
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45
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....Paper Sensor E, Paper Sensor Exit and Toner Sensor Assy ....Base Plate 4 Adjustment Adjustment ....Adjustment Types and Functions ....Adjustment When Replacing a Part 5 Periodical Maintenance Periodical Maintenance - Periodical Replacement Parts Cleaning 6 Troubleshooting Procedures Troubleshooting Procedures - Troubleshooting Tips Check Points Before Correcting Image Problems Notes When Correcting Image Problems Preparation Before Troubleshooting Troubleshooting ....Status Monitor Message List ....Status Message Troubleshooting ........The OKIPAGE 4w malfunctions after the power supply has been turned on. ........[JAM error] - Paper input jam ........[JAM error] - Paper feed jam ........Paper exit jam ........Paper size error ........Fuser assy error ....Image Troubleshooting ........An image is light or blurred entirely. ........Dark background density ........Paper is blank. ........Vertical black band/stripe ........Cyclic defect ........Print voids. ........Poor fusing ........Vertical white band/stripe ........Figure 6-4 ........Figure 6-5 7 Wiring Diagram Wiring Diagram - Interconnect Signal Diagram PCB Layout 8 Parts List Cover Assy Upper Base Frame Unit Base Plate Unit A Local Printing Local Printing B Parallel Interface Parallel Interface - (1) Connector Cable Parallel I/F signals Signal level Interface circuit
46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87
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Timing charts C Maintenance Utility Maintenance Utility - Outline Of Maintenance Utility ROLE OF MAINTENANCE UTILITY OUTLINE OF MAINTENANCE UTILITY FUNCTIONS DETAIL OF EACH FUNCTION - Engine Menu Setting ....Engine Counter ....Exit ....Printer Status ....Test Print ....Option ....About ....Reload
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Service Guide OKIPAGE4w
Chapter 0 General Manual Information
PREFACE This Service Manual describes the maintenance procedures for OKIPAGE 4w LED Page Printers. This manual is written for use by service personnel. Refer to the customer documentation for handling and operating procedures.
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Service Guide OKIPAGE4w
Chapter 1 Configuration
1. CONFIGURATION 1.1 System Configuration The OKIPAGE 4w consists of a control block, a power supply unit, and an engine block. (See Figure 1-1.)
Figure 1-1
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Service Guide OKIPAGE4w
Chapter 1 Configuration
Printer Configuration The printer unit consists of the following five hardware components: · Electro-Photographic Processor · Paper Feeder · Main Control Board · High-Voltage Power Supply Board · Power Supply Unit Figure 1-2 is the configuration of the printer unit.
Figure 1-2
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Service Guide OKIPAGE4w
Chapter 1 Configuration
Specification (1) Type Desktop (2) Outside dimensions Height 5.9" (150 mm) (excludes protruding Width 12.2" (310 mm) portion) Depth 7.5" (191 mm) (3) Weight 1.71 lb (3.8 kg) (4) Development method Dry non-magnetic development system Exposure method LED stationary head (5) Paper used Type · Standard paper  Xerox 4200 (20 lbs) · Application paper (manual face-up feed)  Label  Envelope  OHP paper (Transparency) Size 14" (355.6 mm) (Max.) x 8.5" (215.9 mm) Thickness  Automatic feed: 16 to 28 lbs (60 to 90 g/m 2 )  Manual feed: Label, Envelope, OHP paper (transparency) (6) Printing speed First print: 25 seconds (A4) (after warm-up) Continuous print: 4 sheets/minute (A4) Warm-up time: 40 seconds (120 VAC for ODA, 230 VAC for OEL/INT) (at room temperature 77 °F (25 °C)) (7) Paper feeding method Automatic paper feed or manual paper feed (8) Paper delivery method Face down (9) Resolution 300 dpi x 300 dpi, 600 dpi x 600 dpi (quasi) (10) Power input 230 VAC +15%, -14% (for OEL/INT) 120 VAC +6%, -15% (for ODA) (11) Power consumption Peak: 450W Typical operation: 100W Idle: 30W Power save mode: 5W (12) Temperature and humidity
Caution: Temperature and humidity in storage are measured with the OKIPAGE 4w packed; they are valid for one year. (13) Noise During operation: 48 dB (A) or less Standby: 38 dB (A) or less (14) Consumables Toner cartridge kit 1,000 (5% duty) Image drum cartridge 10,000 (at continuous printing)
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Service Guide OKIPAGE4w
Chapter 1 Configuration
Safety Standards Certification Label The safety certification label is affixed to the following location of the OKIPAGE 4w:
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Service Guide OKIPAGE4w
Chapter 1 Configuration
Warning Label Warning labels are affixed to the locations that may cause bodily injury. During maintenance, do work with enough care while following instructions on these warning labels.
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Service Guide OKIPAGE4w
Chapter 2 Operation Description
OPERATION DESCRIPTION The OKIPAGE 4w consists of a main control board, a high-voltage power supply board, a power supply unit, and an electro-photographic processor. The OKIPAGE 4w receives print data from a higher-level interface and sequentially stores it in memory. The OKIPAGE 4w decodes and edits the received data while storing print data from the interface in memory. It sequentially transfers the edited data to the LED head for each dot line. The electro-photographic processor then prints the data on sheets of paper. The display of the higher-level host is used for device operation and status display. Figure 2-1 is the block diagram of the OKIPAGE 4w.
Figure 2-1 Block Diagram
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Service Guide OKIPAGE4w
Chapter 2 Operation Description
Main Control Board The main control board consists of a one-chip CPU, a program ROM, a DRAM, an EEPROM, a host interface circuit, and a mechanism driving circuit. The mechanism driving circuit consists of an LED head, a main motor, and an electromagnetic clutch. (1) One-chip CPU The one-chip CPU is a custom CPU (8-bit internal bus, 8-bit external bus, 10-MHz clock) incorporating mask ROM and CPU peripheral devices. This CPU has the functions listed in the table below.
(2) Program ROM Program ROM contains a program for the equipment. EPROM is used as program ROM. When mask ROM in the one-chip CPU explained in (1) above is valid, the EPROM is not mounted. (For details on short wiring setting, see Section 7.2.) (3) DRAM DRAM is used as resident memory. (4) EEPROM EEPROM holds the following data: · Menu data · Counter value · Adjustment value (5) Parallel interface The parallel interface receives parallel data from the host; it conforms to the IEEE1284 specification.
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Service Guide OKIPAGE4w
Chapter 2 Operation Description
Power Supply Unit The power supply unit supplies +5 V and +24 V to the main control board from 230 VAC /120 VAC.
The power supply unit also contains a heater drive circuit.
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Service Guide OKIPAGE4w
Chapter 2 Operation Description
High-Voltage Power Supply Board (1) High-Voltage power supply circuit The high-voltage power supply circuit generates the following voltages required for the electro-photographic processor from +5 V according to the control sequence from the main control board. When the cover is open, +5 V supply is automatically interrupted to stop high-voltage output.
Caution: The TR voltage varies with medium and transfer roller impedance. (2) Sensors The high-voltage power supply board consists of the high-voltage power supply circuit that supplies power to the electro-photographic processor system and the photosensor that detects a paper feeding system and toners. Figure 2-2 shows the sensor layout drawing.
Figure 2-2 Sensor Manual feed sensor Paper sensor Outlet sensor Function Monitors whether paper was inserted into the manual feed sensor section. Detects the leading edge of the paper. Monitors paper feeding. Monitors paper feeding and the paper size according to the paper sensor arrival and passing time.
Detects the low toner status.
Sensing State ON: Paper exists. OFF: No paper exists. ON: Paper exists. OFF: No paper exists. ON: Paper exists. OFF: No paper exists.
ON (long): Toner low OFF (short): Toner high
Toner sensor
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Service Guide OKIPAGE4w
Chapter 2 Operation Description
Electro-Photographic Processor The electro-photographic processor prints out the image data sent from the main control board on sheets of paper. Figure 2-3 shows the layout of the electro-photographic processor. (1) Image drum unit The image drum unit makes toner adhere to the electrostatic latent image with static electricity. This electrostatic latent image is formed by light from the LED heads. (2) Electromagnetic clutch The electromagnetic clutch controls the rotation of the hopping roller according to signals from the control board.
(3) Pulse motor (Main) This pulse motor of 48 steps/rotation is two-phase controlled by the signal from the main control board; it controls feeding by changing rotation direction and turning on/off the electromagnetic clutch. The relationship between the main motor, electromagnetic clutch, regist gear, drum gear, and hopping roller is shown in the table below and on the subsequent pages.
Main Motor Normal rotation Reverse rotation Reverse rotation
Electromagnetic Clutch OF ...
