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LED PAGE COLOR PRINTER PRODUCTS
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Service Guide - OKIPAGE 8c
Chapter 0 Introduction
Front Cover
OKIPAGE 8c / OKIPAGE 8cn LED PAGE COLOR PRINTER PRODUCTS
Adobe Acrobat printable reference copy of the OKIDATA Service Training Manual. 11/02/98 Rev. 2.0 Note: This Adobe Acrobat version of the Okidata Service Training Manual was built with the pictures rendered at 72 dpi, which is ideal for screen viewing. For future updates to this manual, and more on-line information visit our Business Partner Exchange (BPX) at http://bpx.okidata.com.
Table of Contents
Page
Service Guide - OKIPAGE 8c
0 Introduction Preface 1 Specifications 1.1 Basic System Configuration 1.2 Printer Specifications 1.3 Option Specifications 1.4 Basic Specifications 2 Operation 2. Operation 2.1 Main Control Board (PCR PCB) 2.2 Engine Control Board (PX4 PCB) 2.3 Power/Board 2.4 Mechanical Processes ....2.4.1 Electrophotographic processing mechanism ....2.4.2 Paper running process 2.5 Sensors ....2.5.1 Paper Related Sensors ....2.5.2 Other sensors 2.6 Correction of Color Deviation 2.7 Transfer Control according to Environmental Changes 2.8 Form Jam Detection 2.9 Cover Opening 2.10 Toner Lower Detection 2.11 Page Size Detection 2.12 Power-on Processing 3 Disassembly 3.0 Parts Replacement 3.1 Precautions for Parts Replacement 3.2 Parts Layout 3.3 How to Change Parts ....3.3.1 Cover Assy Rear ....3.3.2 Motor-Fan (80-25) ....3.3.3 Paper Eject Assy ....3.3.4 Cover Assy Stacker, Guide Eject FD Assy ....3.3.5 Upper Frame Assy ....3.3.6 Plate Support Assemblies ....3.3.7 Limiter 2way (L), (R) / Plate Guide (L), (R) ....3.3.8 Cover ....3.3.9 PCR PCB Assy ....3.3.10 Motor Fan ....3.3.11 PXF PCB/PX4 PCB ....3.3.12 Gear Heat Assy 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
Table of Contents ....3.3.13 Main Motor (A), (B) Assy ....3.3.14 Gear One-way (Z30) ....3.3.15 Motor Assy Belt ....3.3.16 Power Supply Unit, Holder Inlet, Sheet Insulation ....3.3.17 Sensor Assy Box Toner ....3.3.18 Square-shaped Connector ....3.3.19 Motor - Pulse (ID) ....3.3.20 One-way Gears ....3.3.21 Feeder Unit Front ....3.3.22 Manual Feed Hopper Assy ....3.3.23 Guide Paper Input Assy ....3.3.24 Two Lever Input Sensors, Lever 2nd Feed Sensor ....3.3.25 Roller Registration, Roller Assy Hopping ....3.3.26 Hopping Roller Assy ....3.3.27 PXU PCB/PXM PCB, Lever Resist Sensor ....3.3.28 Paper End Lever ....3.3.29 PCO PCB (Operator Panel) ....3.3.30 Holder Gear Toner Assy ....3.3.31 Plate Latch Lever (FD), Spring Latch Lever (FD) ....3.3.32 Transfer Belt ....3.3.33 High Voltage Power Supply Unit, Bracket HV (BT) Assy ....3.3.34 Eraser Bracket Assy, Eraser Bracket (KCM) Assy ....3.3.35 Shaft Link ....3.3.36 Contact Bracket (BL-R) Assy, Contact Bracket (CL-R) Assy ....3.3.37 Contact (BL-L) Assy, Contact (CL-L) Assy ....3.3.38 Contact SB Assy ....3.3.39 PXC PCB ....3.3.40 Heat Unit Assy (Fuser unit and oil roller) ....3.3.41 Oil Roller Kit ....3.3.42 Lever Lock Heat (L)/(R), Guide Side Heat, Spring Lock ....3.3.43 PXL PCB ....3.3.44 Heat Unit Guide Assy ....3.3.45 Holder LED Assy, LED Head 4 Adjustments 4. Adjustments 4.1 Maintenance Modes and Their Functions ....4.1.1 User maintenance mode ....4.1.2 System maintenance mode ....4.1.3 Engine maintenance mode 4.2 Adjustments after Parts Replacement ....4.2.1 Confirm the LED head driving time
Page 40 41 42 43 44 45 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
Table of Contents ....4.2.2 Color Registration Using the Operator Panel (Color deviation correction) 5 Maintenance Preventive Maintenance ....5.1 Periodically Replaced Parts ....5.2 Cleaning ....5.4 Cleaning the Pickup Roller 6 Troubleshooting Procedures 6.0 Troubleshooting Procedures ....6.1 Troubleshooting Tips ....6.2 Points to Check before Correcting Image Problems ....6.4 Preparation for Troubleshooting ....6.5 Troubleshooting Flow ........6.5.1 LCD status message/problem list ........6.5.2 LCD message troubleshooting ........6.5.3 Image Troubleshooting ............Blank paper ............Vertical black ............Vertical white ............Poor fusing (Images are blurred or peeled off when touched) ............Evenly spaced, repeating marks ............Missing characters or colors ............Poor synthesization Color ............Printout colors different from original colors 7 Wiring Diagram 7.1 Resistance Check 7.2 Program/Font ROM Location 8 Centronics Parallel Interface Centronics Parallel Interface A Illustrated Parts List Diagram A1: Covers (Top & Sides) Diagram A2: Printer Unit Diagram A3: Main Chassis Unit (1) Diagram A4: Main Chassis Unit (2) Diagram A5: Main Chassis Motor/PCB Diagram A6: Frame Upper Assy Diagram A7: Guide Cassette (R) Assy Diagram A8: Main Motor (A) Assy Diagram A9: Main Motor (B) Assy Product Accessory: I. Second Paper Feed Preface 1.0 Outline
Page 80
81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99
100 101 102 103 104 105 106 107 108 109 110 111 112 113
Table of Contents ....1.1 Functions ....1.2 External View and Component Names 2.0 Mechanism Description ....2.1 General Mechanism ....2.2 Hopper Mechanism 3.0 PARTS REPLACEMENT ....3.1 Precautions Concerning Parts Replacement ....3.2 Parts Layout ....3.3 Parts Replacement Methods ........3.3.1 Idle rollers ........3.3.2 AOLT-PCB ........3.3.3 Hopping motor ........3.3.4 Feed roller ........3.3.5 Hopping roller ........3.3.6 Side frame (L) assy ........3.3.7 Side frame (R) assy 4.0 Troubleshooting ....4.1 Precautions Prior to the Troubleshooting ....4.2 Preparations Prior to the Troubleshooting ....4.3 Troubleshooting Method ........4.3.1 LCD Status Message List ........4.3.2 Troubleshooting Flow 5.0 CONNECTION DIAGRAM ....5.1 Interconnection Diagram ....5.2 PCB Layout 6. PARTS LIST ....High Capacity Second Paper Feeder ....2nd Tray Assembly
Page 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141
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Service Guide - OKIPAGE 8c
Chapter 0 Introduction Preface This manual provides procedures and techniques for the troubleshooting, maintenance, and repair of OKIPAGE 8c. This manual is written for maintenance personnel, but it should always be accompanied with the OKIPAGE 8c User's Manual for procedures for handling and operating OKIPAGE 8c. For repairing each component of OKIPAGE 8c, see the Troubleshooting Manual. [Notices] The contents of this manual are subject to change without prior notice. Although reasonable efforts have been taken in the preparation of this manual to assure its accuracy, this manual may still contain some errors and omissions. OKI will not be liable for any damage caused or alleged to be caused, by the customer or any other person using this maintenance manual to repair, modify, or alter OKIPAGE 8c in any manner. [Warning] Many parts of OKIPAGE 8c are very sensitive and can be easily damaged by improper servicing. We strongly suggest that OKIPAGE 8c be serviced by OKI's authorized technical service engineers.
Copyright 1998, 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 - OKIPAGE 8c
Chapter 1 Specifications 1.1 Basic System Configuration This diagram shows the basic system configuration of OKIPAGE 8c.
Basic System Configuration Diagram
Copyright 1998, 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 - OKIPAGE 8c
Chapter 1 Specifications 1.2 Printer Specifications This printer unit is composed of the following hardware.
z z z z z
Electro-photographic processor Paper feeder Controller (CU part / PU Part) Operator panel Power board (High voltage part / PU part)
This diagrams shows the printer unit configuration.
Printer Unit Configuration Diagram
Copyright 1998, 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 - OKIPAGE 8c
Chapter 1 Specifications 1.3 Option Specifications The OKIPAGE 8c options are listed below. (1) Second Paper Feeder
(2) RAMM SIMM module (72 pin SIMM, 4MB/8MB/16MB/32MB)
z
Make sure to use a set of 2 of the same volume size modules.
Copyright 1998, 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 - OKIPAGE 8c
Chapter 1 Specifications 1.4 Basic Specifications
(1) (2) (3)
Dimensions Weight Form
Width: 18.8" Approx. 91 lbs. without box
Type: Ordinary paper (Hammermill xx lb.) and Transparency (Only CG3710) Recommended paper (for color printing) Note: the printout color tones are dependent upon the whiteness of the print paper. Sizes: Letter, Legal (13" or 14"), Executive, A4, A5, B5, and B6 (1st tray and front feeder) Reams: 1st tray - 20 lbs. to 28 lbs. 2nd tray - 20 lbs. to 28 lbs. Front feeder - 20 lbs. to 44 lbs. 8 pages per minute (5 pages per minute: Transparency / 34 lb. ~ 44 lb., (4) Printing speed: 2 2 123g/m ~ 166g/m ) 600 dots per inch x 600 dots per inch (5) Resolution 120VAC +5.5%, -15% (6) Input voltage 230VAC to 240VAC +10%, -14% Peak: Approx. 980W (7) Power Typical operation: Approx 230W consumption Idle: Approx 70W Power save mode: Approx 32W 50Hz or 60Hz +2%, -2% (8) Frequency Operating: 54 decibels (without 2nd tray), 55 decibels (with 2nd tray) (9) Noises Standby: 45 decibels Power-saving: 43 decibels (10) Expendables and Toner Cartridge: Approx. 1800 pages (5% density) (each of Y, M, C, and K) service life Image Drum: Up to 12,000 pages (5% density, continuous) (each of Y, M, C and K) Waste Toner Box: Up to 25,000 sheets (under typical printout conditions: Single images of 5% density, equivalent to printout using 14 toner cartridges) Oil Roller Unit: Up to 10,000 sheets (Life defined in the number of actual printed paper sheets) Note: Y=Yellow, M=Magenta, C=Cyan, K=Black (11) Periodically Fuser Heat Unit Assy: 60,000 pages replaced parts Transfer Belt Cassette Assy: 50,000 pages (12) Temperatures and relative humidities Temperature Temperature conditions Celsius Remarks
Fahrenheit
Operating Non-operating Storage (1 year max.) Delivery (1 month max.) Delivery (1 month max.) Humidity
50 to 89.6 32 to 109.4 -14 to 109.4 -20 to 122 -20 to 122
10 to 32 0 to 43 -10 to 43 -29 to 50 -29 to 50
17 Celsius to 27 Celsius (for assurance of full-color printout quality) Power off with drum and toner without drum and toner and Belt Cassette Assy with drum and toner
Operating Non-operating Storage Delivery
Fahrenheit 20 to 80 10 to 90 10 to 90 10 to 90
Humidity condition Celsius Remarks 5 50% to 70% (for assurance of full-color printout quality) 26.8 Power off 35 40
(13) Printer life - 3,000,000 (A4) pages or 5 years
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 7
Service Guide - OKIPAGE 8c
Chapter 2 Operation 2. Operation OKIPAGE 8c is a tandem color electrophotographic page printer, using 4992 Pixel-LED technologies, OPC, dry single-component non-magnetic developing, roller transfer, heat-compression fixing (fusing). The printing method used is a Black Writing method which applies light beams to printout areas. Here is the Functional Block Diagram of OKIPAGE 8c.
Functional Block Diagram
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Service Guide - OKIPAGE 8c
Chapter 2 Operation 2.1 Main Control Board (PCR PCB)
The control board consists of a CPU (NR4700) block, a memory control LSI block, an interface control LSI block, a DRAM block, an EEPROM block, a mask ROM block, and an interface block. Here is the Functional Block Diagram of the main control board (PCR PCB).
Functional Block Diagram of Main Control Board (1) CPU The CPU is a 64-bit RISC architecture processor (provided y NKK). It inputs a frequency of 50 MHz and runs at 100 MHz. It transfers data to a from memory at 50 MHz. Mask ROM The mask ROM block consists of four 16 Mbit (1M x 16 bits) chips and its total size is 8M bytes. The chips are mounted on the PCR-PCB by means of IC sockets and store programs and character fonts. DRAM The DRAM block consists of eight 16 Mbit (1M x 16bits) chips and its total size is 16M bytes. The chips are mounted on the PCR-PCB and can be expanded up to 80M bytes by adding the 32M byte SIMMs to the SIMM slots on the PCR-PCB. EEPROM The EEPROM block consists of 1K-bit chips mounted on a board by means of IC sockets and stores the following: z Menu data z Counter values z Adjustment values Flash ROM The Flash ROM block consists of four 4M bit (256K x 16bits) chips and its total size is 2M bytes. The chips are mounted on the PCR-PCB and are used for storing fonts, macro and demo pages. Memory control LSI This block mainly consists of memory control, CPU control, compression and decompression, and video interface functions. Interface control LSI This block mainly consists of PU interface control, operator panel interface control, EEPROM control, parallel interface control, and HSP control functions.
(2)
(3)
(4)
(5)
(6)
(7)
(8)
Host interface The printer has the following interfaces to the host. Centronics bi-directional parallel interface OKI HSP interface (Option) The single effective interface or the automatic interface select mode can be selected using the menu. If the busy state of the printer continues for a long time period, the buffer near-full control releases the busy status at constant intervals even if the host side is busy so as not to cause interface time-out at the host side. (a) Centronics bi-directional parallel interface This is an interface confirming to IEEE-1284 and provides either unidirectional ad bi-directional communications according to each of the following communication modes.
z Compatibility mode - Unidirectional communications from the host to the printer. z Nibble mode - This mode transfers 4-bit wide data from the printer to the host. In
this mode, each bit of 1-byte data transmits in the form of two nibbles using ERROR, BUSY, FAULT, and SELECT signal leads. This mode can provide bi-directional operation in combination with the compatibility mode. z ECP mode - This mode provides the asynchronous bi-directional interface and transmits and receives 1-byte data using eight data signal leads under semi-duplex control by the host. When the power is turned on, the compatibility mode is automatically selected. The change to another mode form the compatibility mode is made through negotiation. (When the BI-DIRECTION is set to ENABLE in the menu, this change can be performed.) (For the electrical/physical characteristics of this interface, see APPENDIX B). (b) OKI HSP interface (Option) This interface (slot) is an OKI unique universal interface that provides the platform to connect various boards (including those supplied by third vendors) such as the LAN connection expansion board and SCSI expansion board. Any expansion boards compatible with this interface can be mounted on the Control board the piggyback board from without modifying the program at the printer side. Refer to the Conceptual Diagram of the OKI HSP interface.
Conceptual Diagram of OKI HSP Interface
(9)
RAM module
z Pin layout
z Basic specification
Type: Access time: Capacity: Parity: 72 pins SIMM (32 bits buss width) 60ns, 70ns, 80ns 4, 8, 16 32 or 64MB None
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Service Guide - OKIPAGE 8c
Chapter 2 Operation 2.2 Engine Control Board (PX4 PCB) ANALOG INPUT (Heater temperatures and environmental humidity and temperature) Yellow (Y), Magenta (M), Cyan (C), Black (B)
Engine Control Board Block Diagram The engine control block (PU) is controlled by the engine control board (PX4 PCB) which consists of a CPU (MSM65524), general purpose LSI chips, EPROM, EEPROM, pulse motor drivers, and video memory. Refer to the Engine Control Board Block Diagram.
(1)
(2)
(3)
(4)
(5)
(6)
CPU This is an 8-bit CPU (OKI MSM65524) containing the AD converter and controls the whole system. General-purpose LSI This LSI (MB87D113PFV) is provided in the printer engine control block and has controller-engine video interface, LED interface, motor control, sensor input, video memory control, main scanning color correction, skew correction, high-voltage power control, and OST-EX2 functions. EPROM This EPROM (275C512-150) has a storage capacity of 512K bits and stores programs for the PU block. EEPROM This EEPROM (NM93C66N-NW) has a storage capacity of 4K bits. It is mounted on the board by means of IC socket and stores adjustment values. Pulse motor drivers These drivers (MTD2005F) drive eight pulse motors for moving up and down the image drum (EP) and transferring medium. Video memory This SRAM received print data through video interface and stores it.
Copyright 1998, 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 - OKIPAGE 8c
Chapter 2 Operation 2.3 Power/Board The power board consists of an AC filter circuit, a low voltage power supply circuit, a high voltage power supply circuit, and heater drive circuit, and photo sensors. (1) Low voltage power supply circuit. This circuit generates the following voltages. Output voltage +3.3 V +5 V +32 V +12 V -12 V Use CU Unit CPU, LED HEAD Logic circuit supply voltage Motor and fan drive voltage and source voltage for high-voltage supply, discharge lamp HSP, OP Amp, high voltage power supply HSP
(2) High voltage power supply circuit This circuit generates the following voltages necessary for electro-photographic processing from +32 V in accordance with the control sequence from the control board. When cover open state is detected, +32 V supply is automatically interrupted to stop the supply of all high-voltage outputs. YMCK = Yellow, Magenta, Cyan, Black Output CH DB -1.35 KV ±50V Normal paper Y.M.C.K.: -250V/+300V, -232V/+300V (First paper: Y only) K.: -270V/+300V Transparency Y.M.C.: -200V/+300V, K.: -250V/+300V Y.M.C.K.: -650V/0V 0 to 4 KV 0 to 2.5 KV Voltage Use Voltage applied to charging roller Voltage applied to developing roller Remarks
SB TR FIX
Voltage applied to toner supply roller Voltage applied to transfer roller Voltage applied to transfer roller
Variable Variable
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Service Guide - OKIPAGE 8c
Chapter 2 Operation 2.4 Mechanical Processes Here is the Mechanical Process Diagram of OKIPAGE 8c.
Mechanical Process Diagram (Figure 2.5)
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Service Guide - OKIPAGE 8c
Chapter 2 Operation 2.4.1 Electrophotographic processing mechanism
(1)
(2)
Electrophotographic processed - Each process of the electrophotographic processing mechanism is outlined below. (1) Paper pickup - This process causes the roller to give a DC voltage to the paper, resulting in a negative charge. With this negative charge, the paper is electrostatically attracted to the roller. (2) Charging - This process gives a DC voltage to the charge roller so that the image drum may have a uniform negative charge on its surface. (3) Exposure - This process causes the LED head to apply light beams according to image signals to the negatively-charged surface of the image drum. The negative charge on the illuminated surface of the image drum is reduced according to magnitudes of the light beams. Thus, a latent image is formed on the surface of the image drum according to the resulting surface potentials. (4) Developing and recovery of excessive toner - This process applies negatively-charged toner to the surface of the image drum. The toner is electrostatically attracted to the latent image to form a visible image on the surface of the image drum. Simultaneously, this process electrostatically transfers excessive toner from the image drum to the developing roller. (5) Transferring - This process fits paper to the surface of the image drum and applies positive charge (opposite to the charge of the toner) to the back side of the paper from the transfer roller. The toner image is transferred to the paper. (6) Cleaning - Cleaning blade scrapes off the remaining toner of any image drum, which has been used to transfer the image drum the drum to the paper. (7) Fixing - This process fixes the toner image on the paper by pressing the fusing the image. Paper pickup
A DC voltage (0V to 2KV) is applied to the driven roller A, to create a positive charge on the lower surface of the paper. The kept in charged paper is electrostatically attracted to the pickup roller. The paper is in close contact with the conveying Belt and moves steadily. (3) Charging - This process applies a DC voltage to the charging roller in contact with the surface of the image drum.
(4) Exposure - The light beams from the LED head are applied to the surface of the image drum which is charged negatively. The negative charge on the illuminated surface f the image drum is reduced according to the magnitude of the light beams and a latent image is formed on the surface of the image drum according to the resulting surface potentials.
(5) Developing - This process applies toner to the latent image on the surface of the drum to create a toner image. Developing is carried out on the surface of the image drum at where the image contacts with the developing roller. (1) The sponge roller transfers toner to the developing roller. The toner is charged negatively.
(2) The toner blade scrapes away excess toner from the developing roller, leaving a thin film of toner on the surface of the developing roller. (3) The toner is attracted to the latent image on the surface of the image drum, where the image drum contacts the developing roller. The latent image on the surface of the image drum is made visible with the toner. (6) Transferring - The transfer roller made of conductive sponge presses the paper against the surface of the image drum. The paper will make close contact with the surface of the image drum. This process fits the paper to the surface of the image drum (using the transfer roller) and applies a positive charge (opposite to the charge of the toner) from under the paper. When a positive high voltage is applied to the transfer roller from the power supply, the positive charge induced on the transfer roller jumps to the upper surface of the paper (where the transfer roller touches the paper) and attracts the negatively-charged toner from the surface of the image drum onto the surface of the paper.
(7) Fixing - The toner image just transferred to the paper is fused and fixed to the paper while the paper is passing through the gap between the heat roller and the backup roller. The teflon-coated surface of the heat roller is heated by the 800-watt heater (or a halogen lamp) in the heat roller. The temperature of the heat roller surface is controlled by a thermistor in contact with the surface of the heat roller. A thermostat is provided for safety. When the heat roller temperature rises above the preset temperature, the thermostat opens and shuts off power to the heater in the heat roller. The backup roller is evenly pushed against the heat roller by two end springs.
(8) Cleaning - The toner which remains on the (OPC) Image Drum without being fused is scraped by a cleaning blade and discarded in the waste toner tank.
Copyright 1998, 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 - OKIPAGE 8c
Chapter 2 Operation 2.4.2 Paper running process How paper moves through the OKIPAGE 8c is shown in the Paper Route Diagram. Y=Yellow; M=Magenta; C=Cyan; K=Black
(1) Paper hopping and transfer and up/down movement of pinch roller 2 Paper is hopped and delivered by the mechanism shown below. This mechanism is driven by a single pulse motor.
The pulse motor turns in the arrow direction (a) and drives the hopping roller in the direction of "b". The hopping roller drives the resist roller. Gears A, B, and C, have one-way clutches to prevent the roller form rotating reversely. a) Hopping (1) The pulse motor turns in the arrow direction of "a" (counterclockwise) and drives the hopping roller to move the paper until the Entrance sensor turns on. Although the one-way gears B and C are driven, the resist roller 2 does no turn. The reverse rotations of the one-way clutch gears are not transmitted to the resist roller. (2) After the Entrance sensor turns on, the hopping roller keeps on feeding the paper until it hits the resist roller 1. This operation corrections any paper skew.
b) Conveying (1) After paper hopping is completed, the pulse motor turns right (in the direction of "b") to drive the resist rollers 1 and 2. The resist rollers feed the paper until the Form sensor turns on. Although the one-way gear A is also driven, the hopping roller does not turn because of the one-way clutch. (2) The paper is further fed in synchronism with the print data.
(2) The hopping operation of the front feeder and the up/down operation of the pinch roller 2 are performed by a single pulse motor.
When the pulse motor of the front feeder turns right (in the direction of "A"), the front hopping roller turns left (in the direction of "b") to drive the cam. This cam moves up an down the pinch roller 2. The one-way clutch gears are made to turn only in a present direction by means of the one-way clutches.
(a) First and second hopping rollers 1 When the front edge of the paper passes by the pickup roller, the pulse motor of the front feeder turns counter-clockwise (in the direction of "b" to drive the cam. The cam moves up the pinch roller 2. Although the one-way clutch gear A is also rotating, the hopping roller of the front feeder does not rotate (because of the one-way clutch). 2 When the rear edge of the paper passes by the Entrance sensor 2, the pulse motor of the front feeder turns counter-clockwise (in the direction of "b") to drive the cam. The cam moves down the pinch roller 2 until it is sensed by the sensor. Although the one-way clutch gear A is also rotating, the hopping roller of the front feeder does not rotate (because of the one-way clutch).
(b) Front feeding hopping (1) The pulse motor of the front feeder turns right (in the direction of "a") to drive the hopping roller. The paper feeds until the Entrance sensor 2 is activated. Although the one-way clutch gear B is also rotating, the pinch roller 2 does not drive the up/down cam (because of the one-way clutch). After the Entrance sensor is activated, the paper feeds until it reaches the resist roller. (2) This operation corrects any paper skew.
(c) Conveying (1) After paper hopping is completed, the pulse motor turns right (in the direction of "b") to drive the resist rollers 1 and 2. The resist rollers feed the paper until the Form sensor turns on. (2) Although the one-way gear A is also driven, the first hoping roller does not turn (because of the one-way clutch).
(2) Up/down movement of the image drum unit and rotation of the image drum. The up/down movement of the image drum unit and the rotation of the image drum are performed by a mechanism shown below. (See Figure 2.6-a). This mechanism is driven by a single pulse motor. When the pulse motor turns left (Counter-clockwise), the up/down gear turns left (in the direction of "a"), and the up/down lever (see Figure 2.6-b) moves up (in the direction of "a". The up/down lever pushes up the up/down actuator of the image drum unit. The image drum unit moves up as shown in Figure 2.6-b). The image drum rotates freely.
When the pulse motor (see Figure 2.6-a) turns right (Counter-clockwise), the image drum gear turns left (Counter-clockwise) and the up/down gear (one-way gear) is released. The weight of the image drum unit is applied to the up/down lever via the up/down actuator of the image drum unit. The free up/down gear turns right (in the direction "b" in Figure 2.6-a), and the image drum unit goes down until the up/down actuator of the image drum unit is stopped by the up/down lever. (See Figure 2.6-c). During this, the image is transferred onto the running paper.
Upward Movement of Image Drum
Downward Movement of Image Drum (3) Lubrication and cleaning of fixing, ejecting, and heat rollers.
The fixing roller, the ejecting roller, and the heat roller are lubricated and cleaned by a single pulse motor.
When the heat roller pulse motor turns right (in the direction of "a"), the heat roller and the backup roller turn left (in the direction of "a") to fix a toner image onto the paper. At the same time, three ejection rollers turn right (in the direction of "a") to eject the paper. The oil roller and the oil cleaning roller turn left (in the direction of "a") to supply oil to the surface of the heat roller and clean the surface.
Copyright 1998, 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 - OKIPAGE 8c
Chapter 2 Operation 2.5 Sensors 2.5.1 Paper related sensors 2.5.2 Other sensors
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Service Guide - OKIPAGE 8c
Chapter 2 Operation 2.5.1 Paper Related Sensors
Sensor FF sensor 1/2 (Entrance sensor 1/2) Write sensor
Ejection sensor
Function Detects the front edge of an incoming paper and determines timing to change from hopping to conveying. Detects the front edge of the conveyed paper sheet and determines the length of the paper sheet from elapsed time before the front edge of the paper reaches the sensor. Detects the front and rear edges of a paper sheet and determines whether the paper is ejected.
Sensor status ON: Front edge detected OFF: Front edge not detected ON: Form present OFF: Form absent
ON: Form present OFF: Form ejected
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Service Guide - OKIPAGE 8c
Chapter 2 Operation 2.5.2 Other sensors
(1)
Form end sensor This sensor checks whether the paper cassette is empty. Front Feeder form end sensor This sensor checks whether the front feeder has paper. Front Feeder home switch The microswitch checks whether the front feeder stage is in the up or down position. Image Drum Image drum up/down sensor (one for each color Y, M, C, K) Y = Yellow, M = Magenta, C = Cyan, K = Black Waste toner sensor This sensor judges whether the waste toner cartridge is full by measuring a time period at which the sensor lever turns on periodically. When the time period falls under a preset value, the system judges that the waste toner cartridge is full and displays the "waste toner full" message. Resist up/down sensor This sensor detects the up or down position of the resist roller 2. Temperature sensor Refer to 2.7 (Transfer Control according to Environmental Changes). Humidity sensor Refer to 2.7 (Transfer Control according to Environmental Changes).
(2)
(3)
(4)
(5)
(6)
(7)
(8)
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Service Guide - OKIPAGE 8c
Chapter 2 Operation 2.6 Correction of Color Deviation OKIPAGE 8c is equipped with an array of I/D units which cannot be from generation of color deviations. This mechanic below. (1) Color deviations to be corrected 1 Color deviation in the X axis (Positional error of the LED head) 2 Diagonal color deviation (Positional error of the LED head) 3 Color deviation in the Y axis (Positional errors of the I/D units and light receivers)
(2) Method of correction Print out the preset color chart, compare the printed color chart by the original color chart, and enter the amount of color deviation of each color from the operator panel or from the host computer. OKIPAGE 8c calculates correction values from the entered values and changes the write timing of each color (cyan, magenta, and yellow) relative to black.
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Service Guide - OKIPAGE 8c
Chapter 2 Operation 2.7 Transfer Control according to Environmental Changes Transfer Control according to Environmental Changes Room Temperatures and Relative Humidities) OKIPAGE 8c measures the room temperature and humidity. It uses a room temperature sensor and a room humidity sensor. An optimum transfer voltage is calculated, using the obtained environmental conditions. The unit then prints, using the optimum transfer voltage.
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Service Guide - OKIPAGE 8c
Chapter 2 Operation 2.8 Form Jam Detection OKIPAGE 8c checks for a paper jam when the page printer is powered on, and during printing. When a paper jam is found, the OKIPAGE 8c immediately stops the printing process. To recover the printer, open the cover, find and remove the jammed paper, then close the cover. Error Form feed jam Conditions Three hopping operations are made, but the Form Feed sensor (Entrance) does not turn on within a preset time after the Form Feed sensor 1 turns on. The ejection sensor does not turn on within a preset time period after the Write sensor detects the front end of paper. The eject sensor detected the front edge of the paper, but does not detect the rear edge of the paper within a preset time period. The form size (obtained by measuring the time period between the rear edge of the paper passes by the Form Feed sensor 2 after the front edge of the paper passed the Write sensor) is longer by 45mm than the specified form length.
Convey jam Ejection jam Form size error
* To obtain the form size, measure the time interval from when the front edge of the paper passes the Write Sensor until the rear edge of the paper passes the Form Feed Sensor 2. A Form Size Error occurs when the specified length is exceeded by 45 mm.
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Service Guide - OKIPAGE 8c
Chapter 2 Operation 2.9 Cover Opening When the upper, side, or front cover of the OKIPAGE 8c is opened, the Cover open microswitch turns off, the voltage of 32V to the high-voltage power supply is shit off, and all high-voltage outputs are shut off. At the same time, the CPU receives a signal (CVOPN), (indicating the status of the microswitch), and performs the cover open process.
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Service Guide - OKIPAGE 8c
Chapter 2 Operation 2.10 Toner Lower Detection
z
Composition
The device consists of the stirring gear (which rotates at a constant rate), the stirring bar, and the magnet on the stirring bar. The stirring bar rotates by engaging with the concave section in the stirring gear.
z
Operation
Toner Low is detected by monitoring the time interval between engagement of the magnet set on the sensor lever and the magnet on the stirring bar. OPERATION during toner full state
z The stirring bar rotates by interlocking with z When the magnet on the stirring bar
reaches its maximum height, the other end of the bar is dipped in the toner. The stirring bar is pushed by the stirring gear. the stirring gear.
Operation during toner low state
z When the stirring bar reaches the maximum
height, the lack of toner provides no resistance on the other end. The bar falls to the minimum height, due to its own weight. z The time length of the encounter (between the stirring bar magnet and the sensor lever magnet), counter with the magnet of the sensor lever becomes long. By monitoring this time interval, toner low is detected.
z z z z
When the toner low state is detected 2 times consecutively, Toner Low is established. When the toner full state is detected 2 times consecutively, Toner Low is canceled. When there is no change with the toner sensor for 2 cycles (1.965 sec. x 2) or more, the Toner Sensor Alarm is activated. The toner sensor is not monitored while the drum motor is in halt.
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Service Guide - OKIPAGE 8c
Chapter 2 Operation 2.11 Page Size Detection The four tab pieces are driven according to the setting position of the paper guide (through the cam interlocked with the paper guide of the paper cassette). When the paper cassette is inserted into the printer, the position of the tab pieces is detected by a microswitch, recognizing the paper size. STATE OF MICROSWITCHES SW1 0 0 0 1 1 1 1 1 SW2 1 1 0 1 0 1 1 0 SW3 1 0 1 1 1 0 0 0 SW4 1 1 1 0 1 1 0 1 Paper size Letter Executive A4 Legal 14 Legal 13 B5 A5 A6
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Service Guide - OKIPAGE 8c
Chapter 2 Operation 2.12 Power-on Processing 2.12.1 Self-diagnostic test
(1)
Initial test The following check are automatically performed when the printer is power on: (a) ROM check (b) RAM check (c) EEPROM check (d) Flash ROM check
(2)
ROM check (a) Checks ROM by comparing the sum of bits in the received data unit by the number of bits in the transferred data unit. RAM check (a) Checks RAM by writing a preset data patter in RAM, reading the contents of RAM, and comparing the data read from RAM by the data written in RAM. (Write-read test). (b) Checks optional RAM (if it is installed). (c) Checks resident RAM by exclusively O Ring high and low addresses (to prepare 16-bit data units), writing a preset 16-bit data patter in RAM, reading the contents of RAM, and comparing the data read from RAM by the data written in RAM. Checks optional RAM by writing and reading 32-bit fixed patterns ("5555h" and "aaaah") in optional RAM. EEPROM check (a) Checks identification numbers stored in the fixed addresses of EEPROM. (b) Checks the contents of the menu area (by control firmware) and the engine area (by engine firmware). Flash ROM check Checks Flash ROM by writing a present data pattern in Flash ROM, reading the contents of Flash ROM, and comparing the data read from Flash ROM by the data written in Flash ROM. (Write-read test). Option check unit Checks whether the optional units (such as the second tray, and PS SIMM) have been installed before entering the operation mode.
(3)
(4)
(5)
(6)
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Service Guide - OKIPAGE 8c
Chapter 3 Disassembly 3.0 Parts Replacement 3.1 Precautions for Parts Replacement 3.2 Parts Layout 3.3 How to Change Parts
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Service Guide - OKIPAGE 8c
Chapter 3 Disassembly 3.1 Precautions for Parts Replacement
(1)
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. iii) Disconnect the AC cable and interface cable from the printer. (b) Reconnecting the AC cable i) Connect the AC cable and interface cable to the printer. ii) Connect the AC inlet plug to the AC receptacle. iii) Turn on ("I") the power switch of the printer.
(2) (3) (4) (5) (6) (7)
Do not disassemble the printer, if operating normally. Do not remove unnecessary parts: try to keep disassembly to a minimum. Use specified service tools. When disassembling, follow the determined sequence. Otherwise, parts may be damaged. Since screws, collars and other small parts are likely to be lost, they should temporarily be attached to the original positions. When handling ICs such as microprocessors, ROM and RAM, and circuit boards, follow standard electrostatic procedures. Do not place printed circuit boards directly on the equipment or floor.
(8)
No. Service Tools
Tools
Qty Place of Use
Remarks
1 2 3 4 5 6 7 8
No. 1-100 Philips screwdriver No. 2-200 Philips screwdriver, Magnetized No. 3-100 screwdriver No. 5-200 screwdriver Digital multimeter Pliers Handy cleaner LED Head cleaner P/N 51802901
1 1 1 1 1 1 1 1
2-2.5 mm screws 3-5 mm screws
Cleans LED head
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Service Guide - OKIPAGE 8c
Chapter 3 Disassembly 3.2 Parts Layout
Figure 3-1, Covers
Figure 3-2, Print Assemblies
Figure 3-3, Base Assemblies
Figure 3-4, Contact Assemblies
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Service Guide - OKIPAGE 8c
Chapter 3 Disassembly 3.3 How to Change Parts This section explains how to change parts and assemblies appearing in the disassembly diagram below. 3.3.1 Cover Assy Rear 3.3.2 Motor Fan (80-25) 3.3.3 Paper Eject Assy 3.3.4 Cover Assy Stacker Guide Eject FD Assy 3.3.5 Frame Assy Upper 3.3.6 Plate Support Assy 3.3.7 Limiter 2Way (L), (R) / Plate Guide (L), (R) 3.3.8 Cover 3.3.9 PCB Assy: PCR 3.3.10 Motor Fan (CU) 3.3.11 PXF PCB/PX4 PCB 3.3.12 Gear Heat Assy 3.3.13 Main Motor (A), (B) Assy 3.3.14 Gear On-way (Z30) 3.3.15 Motor Assy BT 3.3.16 Power Supply Unit, Holder Inlet, Sheet Insulation 3.3.17 Sensor Assy Box Toner 3.3.18 Square-shaped Connector 3.3.19 Hopping Motor 3.3.20 Gear One-Way 3.3.21 Feeder Unit Front 3.3.22 Manual Feed Hopper Assy 3.3.23 Guide Paper Input Assy 3.3.24 Lever Input Sensor 3.3.25 Roller Registration, Roller Assy Hopping 3.3.26 Roller Hopping 3.3.27 PXU PCB/PXM PCB, Lever Regist Sensor 3.3.28 Paper End Lever 3.3.29 PCO PCB (Operator Panel)
3.3.30 Holder Gear Toner Assy 3.3.31 Plate Latch Lever (FD), Spring Latch Lever (FD) 3.3.32 Belt Cassette Assy 3.3.33 High Voltage Power Supply Unit, Bracket HV 3.3.34 Erase Bracket Assy, Eraser Bracket 3.3.35 Shaft Link 3.3.36 Contact (BL-R) Assy, Contact (CL-R) Assy 3.3.37 Contact (BL-L) Assy, Contact (CL-L) Assy 3.3.38 Contact SB Assy 3.3.39 PXC PCB 3.3.40 Heat Unit Assy 3.3.41 Oil Roller Assy 3.3.42 Lever Lock Heat (L) / (R), Guide Side Heat, Spring Lock 3.3.43 PXL PCB 3.3.44 Heat Unit Guide Assy 3.3.45 Holder LED Assy, LED Head
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Service Guide - OKIPAGE 8c
Chapter 3 Disassembly 3.3.1 Cover Assy Rear Remove the 2 screws (1) then lift the cover assy rear (2) a little bit, then remove the cover assy rear by releasing the two claws.
Figure 3.3.1 Cover Assy Rear 40315201 Cover Assy Rear - RSPL Includes: 40098401 Cover Rear 40187501 Stacker Face-up 40187601 Support Stacker
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Service Guide - OKIPAGE 8c
Chapter 3 Disassembly 3.3.2 Motor-Fan (80-25)
1. Remove the cover assy rear (See 3.3.1) 2. Remove the two screws (1). 3. Detach the fan motor (2) from the guide with its right side lifted then draw the fan motor. 4. Detach the cable (3) then remove the fan motor (3).
Figure 3.3.2 Fan Motor (80-25)
40255201
Fan Motor (80-25)
RSPL
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Service Guide - OKIPAGE 8c
Chapter 3 Disassembly 3.3.3 Paper Eject Assy The paper eject assy includes the frame: eject assy and the guide: paper eject assy. 1. Remove the cover assy rear (See 3.3.1) 2. Open the top cover. 3. Unscrew 4 screws (1) then remove the frame eject assy (2). 4. Remove the guide paper eject assy (3) by releasing the lock of one claw.
Figure 3.3.3 Paper Eject Assy
40303501 40303401
Frame: Eject Assy Guide: Paper Eject Assy
RSPL RSPL
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Service Guide - OKIPAGE 8c
Chapter 3 Disassembly 3.3.4 Cover Assy Stacker, Guide Eject FD Assy
1. Remove the cover assy rear. (See 3.3.1) 2. Release the cable from the cable clamp (1) by opening the clamp. 3. Unscrew 8 screws (2) then remove the cover assy stacker (3). 4. Unscrew 4 screws (4) then remove the guide eject FD assy (5).
Figure 3.3.4 Cover Assy Stacker, Guide Eject FD Assy
40314801 Cover: Assy Stacker RSPL Includes: 40303601 Guide - Eject - FD - Assy RSPL 40449901 Cover - Sub - Assy - Stacker RSPL Item 2 - 50318701 PP4083-5670P001 Screw RSPL
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Service Guide - OKIPAGE 8c
Chapter 3 Disassembly 3.3.5 Upper Frame Assy
1. Remove the cover assy rear. (See 3.3.1.) 2. Remove the cover assy stacker. (See 3.3.4.) 3. Remove the holder LED assy. (See 3.3.45.) 4. Detach the cable from the cable clamp (1) by releasing its lock. 5. Remove connections of 4 connector cables (2) and 4 cables (3). 6. Unscrew 4 screws 4 then remove the PD6 PCB (5). 7. Unscrew 2 screw 6 then remove Guide Holder (7) by releasing the clamp of the claw. 8. Unscrew 4 screws 8 then remove the Upper Frame Assy (9).
Cable is pushed against sharp edge on hole down to LED head. Figure 3.3.5 Upper Frame Assy (9) (7) 40410701 40187801 Frame - Upper Assembly Guide Holder RSPL RSPL
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Service Guide - OKIPAGE 8c
Chapter 3 Disassembly 3.3.6 Plate Support Assemblies The plate support assemblies are provided right and left. The method of those replacements is the same. 1. Remove the heat unit assy. (See 3.3.40) 2. Remove the cover assy rear. (See 3.3.1) 3. Remove the cover assy stacker. (See 3.3.4) 4. Remove the frame assy upper. (See 3.3.5) 5. Detach the cable from the flat cable clip (1) by releasing the lock. 6. Remove the 2 screws (2) then remove the plate support assy (3). Be careful not to lose the spring 4 which is removed with the plate support assy (3).)
Figure 3.3.6 Plate Support Assy (3) A (4) A (1) (36) (46) 40449201 40218301 56636301 40449301 40197401 Plate - Support - (R) - Assy Torsion Spring (B) LP-6665-1 - Flat - Cable - Clip Plate - Support - L - Assy Torsion - Spring (A) RSPL RSPL RSPL RSPL RSPL
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Service Guide - OKIPAGE 8c
Chapter 3 Disassembly 3.3.7 Limiter 2way (L), (R) / Plate Guide (L), (R)
1. Remove the plate support assy (L) and (R). (See 3.3.6) 2. Unscrew 2 screws (1) then remove the limiter 2way (L) (2) and the plate guide (L) (3). 3. Unscrew 2 screws (4) then remove limiter 2way (R) (5) and the plate guide (R) (6).
Figure 3.3.7 Limiter 2way (L), (R) / Plate guide (L) , (R)
40383701 40335001 40383801 40335101
Limiter - 2 way (L) Plate-Guard (L) Limiter - 2 way (R) Plate - Guard (R)
RSPL RSPL RSPL RSPL
8-3, Item 15 8-3, Item 17 8-3, Item 16 8-3, Item 18
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Service Guide - OKIPAGE 8c
Chapter 3 Disassembly 3.3.8 Cover Describes the method of removing the cover assy side (L)/(R), cover assy OP panel, cover front (L)/(R) and the cover rear (L). 1. Remove the cover assy rear. (See 3.3.1) 2. Remove the cover assy stacker. (See 3.3.4) 3. Remove the 2 screws (1) then remove the frame side (L) (2). 4. Remove the 2 screws (3) then release the lock of the claw with the cover assy side (R) (4) lifted a little bit, then remove the cover assy side (R). 5. Detach the operator panel cable (5) from the PCM PCB. 6. Open the FDR unit front in the arrow direction. 7. Remove the 2 screws (6) then remove the cover assy OP panel (7). 8. Remove the 2 screws (8), with the cover front (R) (9) pushed up, then release the lock of the claw, then remove the cover front (R). 9. Remove the 2 screws (10) then remove the cover front (L) (11). 10. Remove the 2 screws (12) then remove the cover rear (L) (13). 11. Pull off the film (15) glued on the cassette guide. 12. Release the engagement with the guide by lifting the cover assy side (L) (14), then remove the cover assy side (L).
Figure 3.3.8 Cover (2) (4) (7) 40195601 40315001 40314901 (7) Includes: 40492601 40387201 56636205 40098301 40098201 40195701 40728701 Frame - Side (L) Cover - Assy - Side (R) Cover - Assy - Op - Panel Cover - Sub - Assy. Op - Panel PCO PCB 2381005P005 *1 Cover - Front (R) Cover - Front (L) Cover - Rear (L) Foam - Seal (Cover) Cover - Side (L) RSPL RSPL RSPL RSPL RSPL RSPL RSPL RSPL RSPL RSPL 8-1, # 16 8-1, # 6 8-1, # 10 8-1, #11 8-1, #18 8-1, #9 8-1, #12 8-1, #17 8-1, #24 8-1, #14
(9) (11) (13) (15) (14)
*1 *2 Includes
Cable: HCUS (1.25) 6F-440-10S6(B) M1 (20624) Cover - Side (R) Frame - Side (R)
RSPL
8-1, #19
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Service Guide - OKIPAGE 8c
Chapter 3 Disassembly 3.3.9 PCR PCB Assy
1. Open the top cover. 2. Remove the 2 screws (1) and release the lock of the claw by lifting the cover assy side (R) (2) a little bit, then remove the cover assy side (R). 3. Remove the 2 screws (8) to remove the plate shield (CU) (9). 4. Remove the 3 screws (3) to remove the plate sealed (4). 5. Detach the operator panel cable (5) from the PCR PCB. PCR PCB requires ten (10) screws for removal. 6. Remove the 7 screws (6) to remove the PCR PCB (7).
Figure 3.3.9 PCB Assy: PCM (2) 40315001 Includes: 40704901 40376901 40604802 Cover - Assy - Side (R) Cover - Side (R) Frame - Side (R) Plate - Shield (CU) Plate - Sealed PCR - PCB RSPL 8-1, #6
(9) (4) (7)
RSPL RSPL RSPL
8-5, #43 8-5, #16 8-5, #15
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Service Guide - OKIPAGE 8c
Chapter 3 Disassembly 3.3.10 Motor Fan
1. Open the top cover. 2. Remove the cover assy side (R), frame side (L), cover assy OP panel and the cover front (R). (See 3.3.8)
3. Unplug the cable (1) and unscrew 2 screws (2), 2 collars (4) and then remove the motor fan (3).
Figure 3.3.10 Motor Fan
(2) (3)
54122925 40197101
PSW2W3-253
Screw Motor, Fan
RSPL RSPL
8-5, #18 8-5, #17
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Service Guide - OKIPAGE 8c
Chapter 3 Disassembly 3.3.11 PXF PCB/PX4 PCB
Since the PXF PCB and PX4 PCB are connected with each other via the connector, remove them at the same time. 1. Remove the PCB assy : PCM. (See 3.3.9) 2. Unscrew 5 screws 1 then remove the cover CU2. 3. Unplug all the cables 5 connected to the PXF PCB 3 and PX4 PCB 4. 4. Unscrew 5 screws 6 then remove the PXF PCB3 and PX4 PCB4 at the same time.
Figure 3.3.11 PXF PCB/PXS PCB
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Service Guide - OKIPAGE 8c
Chapter 3 Disassembly 3.3.12 Gear Heat Assy
1. Remove the cover assy side (R), cover assy OP panel, cover front (R) and the cover rear (L). (See 3.3.8) 2. Remove the cover CU then unplug all the cables connected to the PX4 PCB and unscrew 3 screws. (See 3.3.11) 3. Unplug all the cables connected to the PXF PCB then remove the PX4 PCB. (See 3.3.11) (Be careful not to damage the connector when unplugging cables connected to the PXF PCB.) 4. Remove the heat unit assy. (See 3.3.40) 5. Remove the guide paper eject assy. (See 3.3.3) 6. Remove the motor fan (80-25). (See 3.3.2) 7. Remove the 5 screws (1) and detach the cable (2) then remove the guide heat assy (3). 8. Remove the 2 screws (4) then remove the motor (ID) (5).
Figure 3.3.12 Gear Heat Assy (3) 40310001 Includes: 40124101 40448901 40124101 Gear-Heat-Assy Motor-Pulse (ID) Gear - Heat - Mech Assy Motor - Pulse (ID) RSPL RSPL RSPL RSPL 8-5, #1 8-5, #11 8-5, #40 8-5, #11
(5)
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Service Guide - OKIPAGE 8c
Chapter 3 Disassembly 3.3.13 Main Motor (A), (B) Assy
1. Remove the PXF PCB and PX4 PCB. (See 3.3.11) 2. Remove the 4 screws (8) and remove 4 plate-Earth (9) and 4 lever Up/Dn 2 (1). 3. Detach the all the cables (2) connected and unscrew 4 screws (3), then remove the main motor (A) assy (4). 4. Detach the all the cables (5) connected and unscrew 3 screws (6), then remove the main motor (B) assy (7).
Figure 3.3.13 Main Motor (A), (B) Assy
(9) (1) B (4) (7) (1) A
40583901 40664401 40309101 40309201 40664501
Plate - Earth (LKR) Lever - Up/Dn 2 (YMC) Main - Motor (A) - Assy Main - Motor (B) - Assy Lever - Up/Dn 2 - (K)
RSPL RSPL RSPL RSPL RSPL
8-5, #42 8-5, #6 8-5, #3 8-5, #4 8-5, #41
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Service Guide - OKIPAGE 8c
Chapter 3 Disassembly 3.3.14 Gear One-way (Z30) Four gear one-ways (Z30) are provided but the method of those replacements is the same. Do not disassemble the gear one-ways (Z30) because they are assemblies which require adjustment. 1. Remove the PCB assy : PCM. (See 3.3.9) 2. Remove the cover CU. (See 3.3.11) 3. Remove the 4 Plate-Earth and 4 lever Up/Dn 2. (See 3.3.13) 4. Release the lock with the shaft by spreading the claw, then remove the gear one-way (Z30) (1). [Notice for mounting] Mount the gear one-way (Z30) by fitting it with the shaft link turned in the arrow direction. 40208101 Gear - One - Way - (Z30) RSPL 8-5, #5
Figure 3.3.14 Gear One-Way (Z30)
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Service Guide - OKIPAGE 8c
Chapter 3 Disassembly 3.3.15 Motor Assy Belt
1. Remove the main motor (B) assy. See (3.3.13) 2. Unplug 2 cables (1) connected and unscrew 2 screws (2), then remove the motor assy belt (3).
Figure 3.3.15 Motor Assy Belt (3) 40392301 Includes 40124101 40135301 40450001 Motor - Assy - Belt Motor - Pulse Photo - Interrupter Belt - Motor - Mech - Assy RSPL RSPL RSPL RSPL 8-5, #1 8-5, #11 8-5, #39 8-5, #37
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Service Guide - OKIPAGE 8c
Chapter 3 Disassembly 3.3.16 Power Supply Unit, Holder Inlet, Sheet Insulation
1. Remove the motor-fan (80-25). (See 3.3.2) 2. Remove the frame side (L), the cover assy side (R) and the cover rear (L). (See 3.3.8) 3. Detach the cable (1). 4. Remove the holder inlet (3) by unscrewing 2 screws (2), then remove the power switch (4) and unplug the AC socket (5). 5. Draw the power supply unit (7) by unscrewing 2 screws (6), then unplug the cable (8).
Figure 3.3.16 Power Supply Unit, Holder Inlet, Sheet Insulation (7) 40018901 40019001 Power - Unit - ACDC - Switching 120V Power - Unit - ACDC - Switching 230V RSPL Option RSPL 8-2, # 5 8-2, # 5
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Service Guide - OKIPAGE 8c
Chapter 3 Disassembly 3.3.17 Sensor Assy Box Toner
1. Remove the power supper unit. (See 3.3.16) 2. Unscrew the screw (1) then remove the sensor assy box toner (2) together with the bracket 93). 3. Unscrew the screw (4) then remove the sensor assy box toner (2).
Figure 3.3.17 Sensor Assy Box Toner (2) (3) 40450401 40450201 Sensor - Assy - Box - Toner Bracket - Switch RSPL RSPL 8-3, Item 5 8-3, Item 47
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Service Guide - OKIPAGE 8c
Chapter 3 Disassembly 3.3.18 Square-shaped Connector
1. Remove the power supply unit. (See 3.3.16) (Do not remove the power switch and AC socket from the holder inlet.) 2. Unplug the cable (1). 3. Remove cable (2), screw (5) and bracket (6) in order and then take off SW from bracket (6) to pull off square-shaped connector (4).
Figure 3.3.18 Square-shaped Connector (3) (6) (4) 50318601 40446501 40563101 PB4043-4718 Screw P001 Interlock - SW - Cable - Assy Connection-Cord-Wire RSPL RSPL RSPL 8-3, #38 8-3, #53 8-3, #37
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Service Guide - OKIPAGE 8c
Chapter 3 Disassembly 3.3.19 Motor - Pulse (ID)
1. Remove the cover assy side (R), cover assy OP panel and the cover front (R). (See 3.3.8) 2. Unscrew 2 screws (1) and unplug the cable (2), then remove the bracket hopping motor (3). (Be careful not to lose the gears (5), (6) and (7) which slip off at this time.) 3. Unscrew 2 screws (8) then remove the hopping motor (3).
Figure 3.3.19 Motor - Pulse (ID) (3B) (3A) (5) (6) (7) (2) 40124101 40175001 40143501 40143401 40164401 40171001 Motor - Pulse (ID) Bracket - Hopping - Motor Gear - Feed (118/7) Gear - Idle (92) Gear - One Way - (Z48/74) Cord - Wire - AMP8P AMP4PX2 (Y8D-240x270mm) RSPL RSPL RSPL RSPL RSPL RSPL 8-5, 11 8-5, #7 8-5, #9 8-5, #8 8-5, #10 8-5, #23
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Service Guide - OKIPAGE 8c
Chapter 3 Disassembly 3.3.20 One-way Gears 1. Remove the bracket hopping motor. (See 3.3.19). 2. Remove the spacer (4) first and release the locks with the shaft by spreading the claws of the gear one-way 91), 92) and (3), then remove the gear one-ways.
Figure 3.3.20 Gear One-way
(4) (1) (2) (3)
40686701 40164301 40164501 40250901
Space - Register - Gear Gear - One - way (Z48) Gear - One - way (Z48/48) Gear - One - way (96)
RSPL RSPL RSPL RSPL
8-3, 67 8-3, #31 8-3, #30 8-3, #29
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Service Guide - OKIPAGE 8c
Chapter 3 Disassembly 3.3.21 Feeder Unit Front
1. Remove the cover assy side (R), cover assy OP panel, cover front (R) and the cover front (L). (See 3.3.8.) 2. Remove the cover CU. (See 3.3.11) 3. Unplug the cable (1) and unscrew the screw (2), then remove the bracket FF shaft (3). 4. Remove 2 E-rings (4) then remove the feeder unit front (5). 5. Unscrew each 2 screws (6) then remove 2 bracket FF links (7).
Figure 3.3.21 Feeder Unit Front
(1) (3) (5)
40641801 40193601 40311201 Includes: 55700401
Conn - Cord - Wire Bracket - FF - Link FDR - Unit - Front
RSPL RSPL RSPL
8-2, #29 8-2, #7 8-2, #6 8-2, #26
2PA4128-1076G001 Hopper - Manual - RSPL Feed (Assy)
(7)
40449001 40193501
FDR - Unit - Main - Assy Plate: FF Link
RSPL RSPL
8-2, #27 8-2, #7
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Service Guide - OKIPAGE 8c
Chapter 3 Disassembly 3.3.22 Manual Feed Hopper Assy
1. Open the manual feed hopper assy. 2. Release the engagement between the holder and the link then remove the manual feed hopper assy. (Be careful not to damage the holder.)
Figure 3.3.22 Manual Feed Hopper Assy
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Service Guide - OKIPAGE 8c
Chapter 3 Disassembly 3.3.23 Guide Paper Input Assy
1. Remove the cover assy OP panel, cover front (R) ad the cover front (L). (See 3.3.8.) 2. Remove the feeder unit front. (See 3.3.21) 3. Unscrew 4 screws (1) then draw out the guide paper input assy (2) from the left side by rotating its upper part. (Be careful not to damage the lever sensor resist).
Figure 3.3.23 Guide Paper Input Assy (2) 40303301 Includes: 40097301 40144301 40144401 Guide - Paper - Input - assy Guide - Paper - Input - A Lever - Input - Sensor Lever - 2nd - Feed - Sensor RSPL RSPL RSPL RSPL 8-3, #24 8-3, #43 8-3, #44 8-3, #45
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Service Guide - OKIPAGE 8c
Chapter 3 Disassembly 3.3.24 Two Lever Input Sensors, Lever 2nd Feed Sensor
1. Remove the guide paper input assy. (See 3.3.23.) 2. Release the engagement with the guide (3) by pressing the lever input sensors (1) in the arrow direction, then remove them. 3. Release the engagement with the guide by pressing the lever 2nd feed sensor (2) in the arrow direction, then remove the sensor.
Figure 3.3.24 Two Lever Input Sensors, Lever 2nd Feed Sensor 40303301 Includes: Guide - Paper - Input - Assy RSPL 8-3, #24
(3) (1) (2)
40097301 40144301 40144401
Guide - Paper - Input A Lever - Input - Sensor Lever - 2nd - Feed - Sensor
RSPL RSPL RSPL
8-3, #43 8-3, #44 8-3, #45
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Service Guide - OKIPAGE 8c
Chapter 3 Disassembly 3.3.25 Roller Registration, Roller Assy Hopping
1. Remove the guide paper input assy. (See 3.3.23.) 2. Remove the bracket hopping motor. (See 3.3.19) 3. Remove the gear one-way. (See 3.3.20) 4. Remove the holder gear toner assy. (See 3.3.30) [Removal of the roller registration] 5. Remove the gear (1) and 2 bushes (2) and 2 bearings (3), then 2 roller registrations (4).
[Removal of the roller assy hopping] 6. Remove the bush (5) and the bearing (6). 7. Remove E-rings (9) of the sub-roller hopping at both sides of hopping roller and then release the lock of the roller hopping (7) with the shaft (8) by spreading the claw, then remove the roller hopping from the left side by the sliding shaft (8) in the arrow direction. (Be careful not to lose the knock-pin for fastening the roller hopping (7)