Okidata OKIPAGE 14e Maintenance Manual

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OKIPAGE 14e LED Page Printer

Maintenance Manual

ODA / OEL / INT

2001-03-19 Rev.2

41605601TH Rev.2 1 / 182

Document Revision History

Rev.No. Date

No.

1 2000-12-08 ISSUE ODC Miyashita 2 2001-03-19 NP39 H Ono

Corrected items

Page Description of change

Person in

charge

41605601TH Rev.2 2 /

PREFACE

This Maintenance Manual describes the field maintenance methods for OKIPAGE 14e LED Page Printers. This manual is written for use by the maintenance personnel. Please note that you should refer to the

Printer Handbook and Printer Setup for the handling and operating methods of the equipment.

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1. CONFIGURATION ............................................................................................... 7

1.1 System Configuration ................................................................................... 7

1.2 Printer Configuration..................................................................................... 8

1.3 Optional Configuration .................................................................................. 9

1.4 Specification ................................................................................................11

1.5 Safety Standards ........................................................................................ 13

1.5.1 Certification Label .................................................................................................... 13

1.5.2 Warning Label.......................................................................................................... 13

1.5.3 Warning/Caution Marking ........................................................................................ 14

2. OPERATION DESCRIPTION ............................................................................. 15

2.1 Main Control Board..................................................................................... 17

2.2 Power Supply/Sensor Board....................................................................... 18

2.3 Electrophotographic Process...................................................................... 20

2.3.1 Electrophotographic Process Mechanism ............................................................... 20

2.3.2 Electrophotographic Process................................................................................... 22

2.3.3 Process Operation Descriptions .............................................................................. 25

2.4 Paper Jam Detection .................................................................................. 35

2.5 Cover Open ................................................................................................ 37

2.6 Toner Low Detection ................................................................................... 38

3. PARTS REPLACEMENT.................................................................................... 40

3.1 Precautions for Parts Replacement ............................................................ 40

3.2 Parts Layout................................................................................................ 42

3.3 How to Change Parts.................................................................................. 45

3.3.1 Upper Cover Assy.................................................................................................... 46

3.3.2 IC Card Cover.......................................................................................................... 47

3.3.3 LED Head ................................................................................................................ 48

3.3.4 Operator Panel Assy................................................................................................ 49

3.3.5 Lower Base Unit ...................................................................................................... 50

3.3.6 Pulse Motor (Main/Drum) ........................................................................................ 51

3.3.7 Pulse Motor (Registration) ....................................................................................... 52

3.3.8 Face Up Stacker Assy ............................................................................................. 53

3.3.9 Eject Roller Assy...................................................................................................... 54

3.3.10 Motor Assy............................................................................................................... 55

3.3.11 Hopping Roller Shaft Assy....................................................................................... 56

3.3.12 Stacker Cover Assy ................................................................................................. 57

3.3.13 Registration Roller ................................................................................................... 58

3.3.14 Roller Transfer Assy ................................................................................................ 59

3.3.15 Fusing Unit .............................................................................................................. 60

3.3.16 Back-up Roller ......................................................................................................... 61

3.3.17 Sensor Plate (Inlet).................................................................................................. 62

3.3.18 Sensor Plate (Outlet), Sensor Wire Assy................................................................. 63

3.3.19 Manual Feed Guide Assy ........................................................................................ 64

3.3.20 Sensor Plate (Paper Supply) ................................................................................... 65

3.3.21 M7G-PCB ................................................................................................................ 66

3.3.22 Power Supply/Sensor Board, High Voltage Unit and Contact Assy......................... 67

3.3.23 Cassette Guide L Assy ............................................................................................ 68

3.3.24 Cassette Guide R Assy............................................................................................ 69

3.3.25 Spacer Bearing (L/R)............................................................................................... 70

4. ADJUSTMENT ................................................................................................... 71

4.1 Adjustment Types and Functions................................................................ 71

4.1.1 Status Monitor ......................................................................................................... 71

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4.1.2 Engine Maintenance Utility ...................................................................................... 71

4.2 Adjustment When Replacing a Part............................................................ 72

4.2.1 Setting of LED Head Drive Time.............................................................................. 72

4.2.2 Uploading and Downloading EEPROM Data .......................................................... 73

5. PERIODICAL MAINTENANCE........................................................................... 74

5.1 Periodical Replacement Parts .................................................................... 74

5.2 Cleaning...................................................................................................... 74

5.2.1 Cleaning of LED Lens Array .................................................................................... 74

6. TROUBLESHOOTING PROCEDURES............................................................. 76

6.1 Troubleshooting T ips................................................................................... 76

6.2 Check Points Before Correcting Image Problems ...................................... 76

6.3 Notes When Correcting Image Problems ................................................... 76

6.4 Preparation Before Troubleshooting ........................................................... 76

6.5 Troubleshooting .......................................................................................... 78

6.5.1 Status Monitor Message List ................................................................................... 78

6.5.2 Status Message Troubleshooting ............................................................................ 82

6.5.3 Image Troubleshooting ............................................................................................ 90

7. WIRING DIAGRAM ........................................................................................... 99

7.1 Interconnect Signal Diagram ...................................................................... 99

7.2 PCB Layout and Connector Signal List .................................................... 100

7.3 Resistance Check......................................................................................110

8. PARTS LIST ......................................................................................................112

Appendix A RS-232C SERIAL INTERFACE (option).........................................119

Appendix B CENTRONICS PARALLEL INTERFACE....................................... 121

Appendix C UNIVERSAL SERIAL BUS (USB).................................................. 125

Appendix D MAINTENANCE UTILITY GUI MANUAL....................................... 129

1. Overview .................................................................................................... 129

1.1 System Requirements ............................................................................................... 129

2. Utility Starting-Time Operation ................................................................... 129

3. Main Set Property Sheet ............................................................................ 130

3.1 Printer Status Group.................................................................................................. 130

3.2 LED Head Marking No............................................................................................... 133

3.3 Descriptions on Buttons............................................................................................. 134

4. Menu Property Sheet................................................................................ 136

4.1 Setting Items.............................................................................................................. 137

5. Local Print Property Sheet ......................................................................... 140

6. Product Set Property Sheet........................................................................ 142

7. About Property Sheet ................................................................................. 143

8. For Invalid Events....................................................................................... 144

8.1 Failed Printer Setting ................................................................................................. 144

8.2 RAM Check Error....................................................................................................... 144

Appendix E MULTI-PURPOSE FEEDER.......................................................... 134

1. OUTLINE.................................................................................................... 145

1.1 Functions ................................................................................................................... 145

1.2 External View and Component Names...................................................................... 145

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2. MECHANISM DESCRIPTION.................................................................... 146

2.1 General Mechanism .................................................................................................. 146

2.2 Hopper Mechanism ................................................................................................... 146

3. PARTS REPLACEMENT............................................................................ 147

3.1 Precautions Concerning Parts Replacement............................................................. 147

3.2 Parts Layout .............................................................................................................. 149

3.3 Parts Replacement Methods ..................................................................................... 150

3.3.1 Link ................................................................................................................ 151

3.3.2 Separator....................................................................................................... 152

3.3.3 OLEV-11-PCB ............................................................................................... 153

3.3.4 Pulse Motor ................................................................................................... 154

3.3.5 Planet Gear ................................................................................................... 155

3.3.6 Roller-A and B ............................................................................................... 156

4. TROUBLESHOOTING ............................................................................... 157

4.1 Precautions Prior to the Troubleshooting .................................................................. 157

4.2 Preparations for the Troubleshooting ........................................................................ 157

4.3 Troubleshooting Method............................................................................................ 158

4.3.1 LED Status Message List .............................................................................. 158

5. CONNECTION DIAGRAM ......................................................................... 160

5.1 Interconnection Diagram ........................................................................................... 160

5.2 PCB Layout ............................................................................................................... 160

6. PARTS LIST ............................................................................................... 161

Appendix F HIGH CAPACITY SECOND PAPER FEEDER MAINTENANCE ... 163

1. OUTLINE.................................................................................................... 163

1.1 Functions ................................................................................................................... 163

1.2 External View and Component Names...................................................................... 163

2. MECHANISM DESCRIPTION.................................................................... 164

2.1 General Mechanism .................................................................................................. 164

2.2 Hopper Mechanism ................................................................................................... 164

3. PARTS REPLACEMENT............................................................................ 165

3.1 Precautions Concerning Parts Replacement............................................................. 165

3.2 Parts Layout .............................................................................................................. 167

3.3 Parts Replacement Methods ..................................................................................... 168

3.3.1 Stepping Motor (Hopping) ............................................................................. 169

3.3.2 TQSB-2 PCB ................................................................................................. 171

3.3.3 Hopping Roller Shaft Assy and One-way Clutch Gear.................................. 171

4. TROUBLESHOOTING ............................................................................... 172

4.1 Precautions Prior to the Troubleshooting .................................................................. 172

4.2 Preparations for the Troubleshooting ........................................................................ 172

4.3 Troubleshooting Method............................................................................................ 173

4.3.1 LED Status Message List .............................................................................. 173

5. CONNECTION DIAGRAM ......................................................................... 175

5.1 Interconnection Diagram ........................................................................................... 175

5.2 PCB Layout ............................................................................................................... 175

6. PARTS LIST ............................................................................................... 176

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1. CONFIGURATION

1.1 System Configuration

OKIPAGE 14e consists of control and engine blocks in the standard configuration, as shown in Figure 1-1.

In addition, the options marked with asterisk(*) are available.

Operator Panel

Paper

Cassette

*High Capacity Second Paper

Feeder

Paper Feeding Mechanism

(First Tray Unit)

Engine Unit

Face Up

Stacker

Face

*Multi Purpose

Feeder

Centronics

USB

Electrophotographic

Processing Unit

Fuser Unit

Main Control Board

Down

Stacker

High Voltage Unit

and Sensor Board

Power Supply

* : Optional

RS-232C

Expansion Board 1 DRAM SIMM Socket 1 Flash SIMM Socket

RS-232C Serial*

Interface Board 1 DRAM SIMM Socket 1 Flash SIMM Socket

DRAM SIMM*

Flash SIMM* (Flash memory)

Figure 1-1

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1.2 Printer Configuration

The printer unit consists of the following hardware components:

• Electrophotographic Processor

• Paper Feeder

• Controller

• Operator Panel

• Power Supply Unit The printer unit configuration is shown in Figure 1-2.

Upper cover

Operator panel assy

Stacker assy

Optional board

Toner-cartridge(Type 5)

(consumable)

Fusing unit

Image drum unit(Type 8)

(consumable)

Legal/universal paper cassette

Power supply

Main control board

High Voltage Unit/sensor board

Figure 1-2

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1.3 Optional Configuration

The options shown below are available for use with OKIPAGE 14e. These are available separately from the printer unit.

(1) High Capacity Second Paper Feeder

(2) Multi Purpose Feeder

(3) Expansion Board

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(4) RS-232C Serial Interface Board

(5) DRAM SIMM Memory

DRAM SIMM memory is available with memory of 8MB,16MB,32MB [Oki Data genuine]. The access time of SIMM memories are 60ns, 70ns, 80ns, and 100ns.

(6) Flash SIMM

Flash SIMM is available with memory of 4MB, 8MB and 16MB.

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1.4 Specification

(1) Type Desktop (2) External dimensions Height 7.9” (200 mm)

(3) Weight Approx. 9 kg (4) Developing method Dry electrophotography

Exposing method LED stationary head

(5) Paper used <Type>

Width 13.0” (330 mm) Depth 15.6” (395 mm)

• Standard paper – Xerox 4200 (20 lbs)

• Application paper (manual face-up feed) – Label – Envelope – OHP paper (transparency)

<Size>

• Standard sizes – Letter – Legal* [*Without Multi Purpose Feeder (Option)] – Legal-13* – Executive – COM-10** [**manual feed and Multi Purpose Feeder

(Option) only]

– Monarch** – DL** – C5** – A4 – A5 – B5 (JIS) – A6

• Applicable sizes – Width: 3.4” to 8.5” (86 to 216 mm) – Length: 5.5” to 14” (140 to 355.6 mm)

– Automatic feed: 16 to 28 lbs (60 to 105 g/m2) – Manual feed: Label, OHP paper (transparency)

Envelope (24 to 28lbs)

(6) Printing speed Continuous printing: 14 pages per minute with Letter size

paper. [Except Multi purpose Feeder (10.7ppm)]

Warm-up time: 45 seconds typical at room temperature

[68˚F (20˚C), AC 120/230 V].

First page print time: 7.5 seconds typical for the Letter size

paper after warm-up. (7) Paper feeding method Automatic feed or manual feed (8) Paper delivery method Face down/face up (9) Resolution 300 × 300 dots/inch

300 × 1200 dots/inch

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(10)Power input 120 V + 6%, –15%

230 VAC ± 10%

(11)Power consumption 120VAC 230VAC

Peak : Approx. 600W Approx. 600W Typical operation : Approx. 340W Approx. 340W Idle : Approx. 75W Approx. 66W Power save mode : Approx. 10W Approx. 11W

(12)Temperature and humidity

In operation Power off mode During Storage Unit

Temperature

Humidity Maximum wet bulb

temperature Minimum difference

between wet and dry

50-90

(10-32)

20-80

(25)

35.6 (2)

32-110

(0-43) 10-90

80.4

(26.8)

35.6 (2)

14-110

(–10-43)

10-90

˚F

(˚C)

%RH

˚F

(˚C)

˚F

(˚C)

bulb temperatures

1. Storage conditions specified above apply to printers in packed condition.

2. Temperature and humidity must be in the range where no condensation occurs.

Temperature

(

32 28

Operation range

20 80

Humidity (%)

(13) Noise During operation : 53 dB (A) or less

Standby : 38 dB (A) or less Quiet mode : Back ground level

(14) Consumables Toner cartridge kit ODA : 2,000 (5% duty)

OEL/INT : 2,500 (5%duty)

Image drum cartridge 20,000 (at continuouts printing)

14,000 (3 page/job) without Power Save 9,000 (1 page/job) without Power Save 8,000 (1 page/job) without Power Save (Minimum)

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1.5 Safety Standards

1.5.1 Certification Label The safety certification label is affixed to the printer in the position described below.

ODA AC : 120V model ODA AC : 230V model

INT AC : 230V model

1.5.2 Warning Label The warning labels are affixed to the sections which may cause bodily injury. Follow the instructions on warning labels during maintenance.

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1.5.3 Warning/Caution Marking The following warning and caution markings are made on the power supply/sensor board.

ENGLISH Heat sink and transformer core present risk of electric shock. Test before touching. FRENCH Le dissipateur thermique et le noyau du transformateur présentent des risques de choc électrique. Testez avant de manipuler. SPANISH Las disipadores de color el núcel del transformador pueden producir un choque eléctrico. Compruebe antes de tocar. PORTUGUESE O dissipador de calor e o núcleo do fransiormador apresentam risco de choque elétrico. Teste antes de focar.

ENGLISH

Circuits maybe live after fuses open.

FRENCH

Il se peut que les circuits soient sous tension une fois que les fusibles ont éfé rerirés.

SPANISH

Las circuitos pueden estar activos una vez que se hayan abierio los fusibles.

PORTUGUESE

Os circuitos podem estar energizados após os fusiveis se queimarem.

CAUTION

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2. OPERATION DESCRIPTION

OKIPAGE 14e consists of a main control board, a power supply/sensor board, an operator panel, an electrophotographic process mechanism, and revision for illumination of LED head.

The main control board receives data via the host I/F, it then decodes, edits and stores the data in memory. After completing the editing of a single page of data, it references the font memory and generates bit image data, which is transferred to the LED head in one dot line units.

Through the electrophotographic process mechanism, the data is printed on the paper. The operator panel is used for operations and status display. OKIPAGE 14e block diagram is shown in Figure 2-1.

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Expansion Board

(Option)

RS232C Interface Board

(Option)

Main Control Board

Program & Font ROM

8MB Mask ROM

EEPROM

Centronics parallel I/F

74LS07

USB I/F

ML60851

Reset circuit

For optional board

DATA

BUS

(32bit)

1 Chip CPU

Resident RAM

2MB x 2 DRAM

(4MB)

Registration motor

HEAT ON

Drum motor &

drive circuit

FAN Driver

Multi-Purpose

Feeder (Option)

High Capacity

Second Paper

Feeder (Option)

Operation Panel

Drum Motor

MMRegistration Motor

FAN

FAN ALM

LED Head

High Voltage Unit

Inlet sensor 1

Inlet sensor 2

Paper sensor

Outlet sensor

Paper out sensor

Toner low sensor

5V 12V 30V

AC-DC

Converter

Cover

open

switch

LSI

Sub-

Charge roller

High voltage

generation

circuit

Fusing temperature

control circuit

Heater drive

circuit

Filter circuit AC IN

Transfer roller

Developping

roller

Toner supply

roller

Cleaning

roller

Thermistor

Heater

Power Supply Unit

Figure 2-1 OKIPAGE 14e Block Diagram

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2.1 Main Control Board

The main control board consists of a single chip CPU, two program/font ROMs, four DRAMs, an EEPROM, a host interface circuit, and a mechanism driving circuit.

(1) Single chip CPU

The single chip CPU is a custom CPU (32-bit internal bus, 32-bit external bus, 49.766-MHz clock) which incorporates the RISC CPU and its peripheral devices, and has the following functions:

Built-in device Function

Chip select controller Bus controller DRAM controller DMA controller Parallel interface controller Serial interface controller Video output port LED STB output port Timer

Serial I/O port I/O port

(2) Program and Font ROMs

The Program and Font ROMs store the equipment program and various types of fonts. Mask ROM is used as Program and Font ROMs. The mounting locations of these Program and Font ROMs vary depending on the type of the ROMs.

(3) DRAM

Control of ROM, DRAM and I/O device

Transfer of image data from DRAM to video output port Control of Centronics parallel interface Control of RS-232C serial interface Control of LED head

Generation of various control timing Monitoring of paper running and paper size Control of operator panel, EEPROM, and options Input and output of sensor and motor signals

The DRAM is a 4MB resident memory on the main control board that stores edited data, image data, DLL data and macro data.

(4) EEPROM

4,096-bit Electrically Erasable PROM (EEPROM), is loaded with the following kinds of data:

• Menu data

• Various counter data (page counter, drum counter)

• Adjusting parameters (LED head drive time, print start position, paper feed length)

(5) Parallel Interface

Parallel data is received from a host system via parallel interface which conforms to the IEEE1284 specification.

(6) USB Interface

Serial data is received from a host system via USB which conforms to the USB 1.1 specification.

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2.2 Power Supply/Sensor Board

The power supply/sensor board consists of an AC filter circuit, a low voltage power supply circuit, a high voltage power supply circuit, heater drive circuit, and photosensors.

(1) Low Voltage Power Supply Circuit

This circuit generates the following voltages.

Output voltage Use

+5 V +30 V +12 V

(2) High Voltage Power Supply Circuit

This circuit generates the following voltages required for electrophotographic process from +5 V, according to the control sequence from the main control board. When cover open state is detected, +5 V supply is interrupted automatically to stop the supply of all high-voltage outputs.

Output Voltage Use Remarks

Sub CH

DB SB TR CB

(3) Photosensor

The photosensor mounted on this power supply/sensor board monitors the status of paper being fed through the printer during printing.

–1.3 KV –1.5 KV to –1.8 KV –265 V/+300 V –500 V/ 0 V +500 V to +4.5 KV/–1100 V +400 V/–1350 V

Logic circuit supply voltage and LED head supply voltage Motor and fan drive voltage Source voltage for high-voltage supply

Voltage applied to charge roller Voltage applied to sub-charge roller Voltage applied to developing roller Voltage applied to toner supply roller Voltage applied to transfer roller Voltage applied to cleaning roller

Variable

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The sensor layout diagram is shown in Figure 2-2.

Heat roller

Transfer roller

Exit roller

Outlet sensor

Paper sensor

Inlet

Toner

sensor 2

sensor

Paper feeding direction

Hopping

roller

Paper end sensor

Inlet sensor 1

Registration roller

Figure 2-2

Sensor Function Sensing state

Inlet sensor 1

Detects the leading part of the paper and gives the monitor timing for switching from hopping operation to feeding operation.

ON: Paper exists.

OFF: No paper exists. Monitors paper feeding situation and paper size based on the paper arrival time and running time.

Inlet sensor 2

Detects the paper width.

ON: larger than A4

OFF: Smaller than A4

Paper sensor

Outlet sensor

Detects the leading portion of the paper. Monitors the paper feeding situation.

Monitors the paper feeding and size according to the time of arrival to and leaving past the sensor.

ON: Paper exists.

OFF: No paper exists.

ON: Paper exists.

OFF: No paper exists.

Paper end sensor

Detects the end of the paper.

ON: Paper exists.

OFF: No paper exists.

Toner low sensor

41605601TH Rev.2 19 /

Detects the lack of toner.

- - - - -

2.3 Electrophotographic Process

Paper cassette

Eject sensor lever

Eject roller assy

Heat roller

Charge

roller

Sub-charge roller

Developing

roller

Pressure roller

Toner cartridge

LED head

Image

drum

unit

Back-up roller

Cleaning roller

Transfer roller

Paper

sensor

plate

Inlet

sensor

plate

Registration roller

Hopping roller

2.3.1 Electrophotographic Process Mechanism This mechanism actuates the printing of image data supplied by the main control board on the paper

by electrophotographic process. The layout of the electrophotographic process mechanism is shown in Figure 2-3.

Figure 2-3

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(1) Image Drum Unit

The image drum unit consists of a sensitive drum, a charger, and a developer. The unit forms a toner image on the sensitive drum, using a electrostatic latent image formed by the LED head.

(2) Registration Motor

The registration motor is a pulse motor of 48 steps/rotation with two-phase excitement by the signal from the main control board. It drives the hopping and registration rollers via two one-way clutches according to the direction of rotation.

(3) Main (Drum) Motor

The main or drum motor is a pulse motor of 48 steps/rotation with two-phase excitement by the signal from the main control board and is the main motor of this mechanism.

(4) LED Head

Image data for each dot line from the main control board is received by the shift register and latch register. The 2496 LED's are driven to radiate the image data on the image drum.

(5) Fuser

The fuser consists of a heater, a heat roller, a thermistor and a thermostat. The AC voltage from the power supply/sensor board is applied to the heater controlled by the

HEATON signal from the main control board. This AC voltage heats the heater. The main control board monitors the heat roller temperature via the thermistor, and regulates the heater roller to keep it at a designated temperature in the menu, depending on the thickness of the paper (tray 1&2: light=175~185°C, medium light=180~190°C, medium=185~195°C, medium heavy and heavy=195~205°C; manual feeding and power envelope feeder: light=165~180°C, medium light=170~185°C, medium=175~190°C, medium heavy=180~195°C, heavy=190~205°C, transparency = 170~185°C) by connecting or disconnecting the AC voltage supply to the heater.

When an abnormal rise of the heater roller temperature takes place, the thermostat of the heater voltage supply circuit becomes active and forcibly cuts the AC voltage supply.

The temperature setting of the fuser can be changed through operator panel setting.

41605601TH Rev.2 21 /

2.3.2 Electrophotographic Process The electrophotographic processing is outlined below. The electrophotographic printing process is

shown in Figure 2-4. 1 Charging

The surface of the image drum is charged uniformly with a negative charge by applying the negative voltage to the charge roller.

2 Exposure

Light emitted from the LED head irradiates the negatively charged surface of the image drum. The surface potential of the irradiated portion of the image drum surface becomes lower, forming the electrostatic latent image associated with the print image.

3 Developing and toner recovery

When the negatively charged toner is brought into contact with the image drum, it is attracted to the electrostatic latent image by static electricity, making the image visible.

At the same time, the residual toner on the image drum is attracted to the developing roller by static electricity.

4 Transfer

When paper is placed over the image drum surface, the positive charge which is opposite in polarity to that of the toner, is applied to the reverse side of the paper by the transfer roller. The toner is attracted by the positive charge and is transferred onto the paper. This results in the transfer of the toner image formed on the image drum onto the paper.

5 Temporary cleaning

Residual toner which remains on the image drum without being transferred is evened out by the cleaning roller and is temporarily attracted to the cleaning roller by static electricity.

6 Fusing

The toner image transferred onto the paper is fused to the paper by heat and pressure.

An electrophotographic process timing chart is shown in Figure 2-5.

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Paper eject roller

(Face down)

Power supply

Paper eject roller

Paper eject

(Face up)

Cleaning roller

LED head

Image data

Registration roller Hopping roller

Heater roller

Power

supply

Doctor blade

Power supply

(Bias voltage)

Toner supply roller

Toner cartridge

Paper

eject

Fusing

Back-up roller Transfer roller

Charger roller

Charging

Cleaning

Paper hopping

Paper feed

Image

production

developing

Transfer

Cleaning

FusingPaper eject

Path of paper feeding

Direction of rotation of the image drum

Power supply

Outlet sensor

Inlet sensor

Developing

Developing roller

Paper sensor

Exposure

Transfer

Paper path selector

Paper

registration

Paper

supply

Paper tray

Figure 2-4

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PRINT-N

PRDY-N

DM-ON-N

Figure 2-5

RM-ON

INSNS

OUTSNS-N

OUT Sensor OFF

Feed stopIN Sensor OFFFeed start

2.3.3 Process Operation Descriptions (1) Hopping and Feeding

Hopping and feeding motions are actuated by a single registration motor in the mechanism as shown below:

Registration motor

Idle gear

Registration roller

Hopping roller

Motor gear

Registration gear

Hopping gear

The registration motor turning in direction "a" drives the hopping roller. The registration motor turning in direction "b" drives the registration roller. The registration and hopping gears have oneway bearing, so turning any of these gears in the reverse direction will not transmit the motion to the corresponding roller.

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(a) Hopping

1 For hopping, the registration motor turns in direction "a" (clockwise direction) and drives

the hopping roller to advance the paper until the inlet sensor turns on (in this case, the registration gear also turns, but the registration roller is prevented from turning by the one-way bearing).

2 After inlet sensor is turned on by the paper advance, the paper is further advanced to

a predetermined distance until the paper hits the registration roller (the skew of the paper can thus be corrected).

Paper

Registration roller

Hopping roller

(b) Feeding

1 When hopping is completed, the registration motor turning in direction "b" (counter-

clockwise direction) drives the registration roller to advance the paper (in this case, the hopping gear also turns, but the hopping roller is prevented from turning by the one-way bearing).

2 The paper is further advanced in synchronization with the print data.

Image drum

Paper

Transfer roller

41605601TH Rev.2 26 /

Registration roller

Hopping roller

(2) Charging

Charging is actuated by the application of the DC voltage to the charge roller that is in contact with the image drum surface.

Sub-Charge roller

Charge roller

Image drum

Power supply

(Sub-CH)

(CH)

The charge roller is composed of two layers, a conductive layer and a surface protective layer, both having elasticity to secure good contact with the image drum. When the DC voltage applied by the power supply exceeds the threshold value, charging begins. The applied voltage is proportional to the charge potential, with offset of approximately –550V.

charge potential

[V]

–

750

–

550 [V]

1300

applied voltage

41605601TH Rev.2 27 /

(3) Exposure

Light emitted by the LED head irradiates the image drum surface with a negative charge. The surface potential of the irradiated portion of the image drum drops, forming an electrostatic latent image associated with the image signal.

LED head

Charge roller

Power

supply

Paper

Image drum

LED head

Image drum

The image drum is coated with an underlayer (UL), a carrier generation layer (CGL), and carrier transfer layer (CTL) on aluminum base. The organic photo conductor layer (OPC), comprising CTL and CGL, is about 20 µm thick.

30mm

Image drum

CTL CGL

Base

41605601TH Rev.2 28 /

The image roller surface is charged to about –750 V by the contact charge of the charge roller. When the light from the LED head irradiates the image drum surface, the light energy generates

positive and negative carriers in the CGL. The positive carriers are moved to the CTL by an electrical field acting on the image drum. Likewise, the negative carriers flow into the aluminum layer (ground).

The positive carriers moved to the CTL combine with the negative charges on the image drum surface accumulated by the contact charge of the charge roller, lowering the potential on the image drum surface. The resultant drop in the potential of the irradiated portion of the image drum surface forms an electrostatic latent image on it. The irradiated portion of the image drum surface is kept to about –100 V.

–750

Image drum

surface potential

–100

(V)

Charged part

Light

from

LED

Part

irradiated

LED

Charged

part

41605601TH Rev.2 29 /

(4) Developing

Toner is attracted to the electrostatic latent image on the image drum surface, converting it into a visible toner image. Developing takes place through the contact between the image drum and the developing roller.

1 As the toner supply roller rotates while rubbing on the developing roller, a friction charge is

generated between the developing roller and the toner, allowing the toner to be attracted to the developing roller (the developing roller surface is charged positive and the toner, negative).

Doctor blade

Charge roller

Developing roller

Image drum

Toner supply roller

2 The toner attracted to the developing roller is scraped off by the doctor blade, forming a thin

coat of toner on the developing roller surface.

3 Toner is attracted to the exposed portion (low-potential part) of the image drum at the contact

of the image drum and the developing roller, making the electrostatic latent image visible.

–

300V

Developing roller

–+–+–+–+–+–+–+–+–+–+–+–+–+–+–+–+–+–+–+–+–+–+–

+++++++++++++++++++++++

–

750V–100V–750V–750V

Toner

Image drum

Exposed

part

Exposed

part

–

100V

An illustration of activities at the contact point of the image drum surface and the developing roller (arrow marks denote the direction of the electrical field).

41605601TH Rev.2 30 /

Note:

The bias voltage required during the developing process is supplied to the toner supply roller and the developing roller, as shown below. –500 VDC is supplied to the toner supply roller, –265 VDC to the developing roller.

Connected and bias supplied

when the cover is closed.

Developing roller

Base

Image drum

Toner supply roller

41605601TH Rev.2 31 /

(5) Transfer

Image drum

Transfer roller

Paper

Power

supply

The transfer roller is composed of conductive sponge material, and is designed to get the image drum surface and the paper in a close contact.

Paper is placed over the image drum surface, and the positive charge, opposite in polarity to that of the toner, is applied to the paper from the reverse side.

The application of a high positive voltage from the power supply to the transfer roller causes the positive charge inducement on the transfer roller surface, transferring the charge to the paper as it contacts the transfer roller. The toner with negative charge is attracted to the image drum surface, and it is transferred to the upper side of the paper due to the positive charge on the reverse side of the paper.

41605601TH Rev.2 32 /

(6) Fusing

When the transfer is completed, the toner image is fused to the paper by heat and pressure as the paper with unfused toner image passes between the heater roller and the back-up roller. The heater roller with Teflon coating incorporates a 550W heater (Halogen lamp), which generates heat.

A thermistor which is in contact with the heater roller regulates the temperature of the heater roller to a designated temperature in the menu, depending on the thickness of the paper (tray 1&2: light=175~185°C, medium light=180~190°C, medium=185~195°C, medium heavy and heavy=195~205°C/manual feeding and power envelope feeder: light=165~180°C, medium light=170~185°C, medium=175~190°C, midium heavy=180~195°C, heavy=190~205°C, transparency = 170~185°C). A safety thermostat cuts voltage supply to the heater off by opening the thermostat in the event of abnormal temperature rises.

The back-up roller is held under a pressure of 3.76 kg applied by the pressure spring on each side.

Paper

Separation claw

Heater

Pressure Spring

Heater roller

Thermistor

Back-up roller

41605601TH Rev.2 33 /

(7) Cleaning

When the transfer is completed, the residual toner left on the image drum is attracted to the cleaning roller temporarily by static electricity, and the image drum surface is cleaned.

Image drum

Cleaning roller

Power

supply

+DC

Transfer roller

(8) Cleaning of rollers

The charge, transfer and cleaning rollers are cleaned for the following cases:

• Warming up when the power is turned on.

• Warming up after the opening and closing of the cover.

• When the number of sheets accumulated reaches 14 or more.

• When the printout operation ends.

Changes in bias voltage applied to each roller move the attaching toner off the roller to the image drum and return it to the developer.

41605601TH Rev.2 34 /

2.4 Paper Jam Detection

The paper jam detection function monitors the paper condition when the power is turned on and during printing. When any of the following conditions arises, this function interrupts the printing process. If any of the following errors is encountered, printing can be recovered by removing the jammed paper (by opening the upper cover, removing the jammed paper and closing the upper cover).

Error Cause of error

Paper input jam

Paper feed jam

Paper exit jam

Paper size error

Main (drum) motor

• The paper is in contact with the inlet sensor when the power is turned on.

• After hopping operation is attempted three times, the leading edge of the paper does not reach

the inlet sensor.

• The paper is in contact with the paper sensor when the power is turned on.

• The leading edge of the paper does not reach the paper sensor within a predetermined feeding

distance since the paper has reached the inlet sensor.

• The trailing edge of the paper does not pass over the paper sensor within a predetermined feeding distance after the same has passed over the inlet sensor.

• The leading edge of paper does not reach the outlet sensor within a predetermined feeding distance after the paper has reached the paper sensor.

• The paper is in contact with the outlet sensor when the power is turned on.

• The paper does not pass over the outlet sensor within a predetermined feeding distance after

the leading edge of the paper has reached the outlet sensor.

• The paper size check for manual feeding finds that the paper size is free size.

• The size of the paper is monitored by the inlet sensor 1. The paper is not detected by the inlet

sensor 1 within predetermined feeding distance.

• The inlet sensor 2 detects that the size of the loaded paper is A4 or larger, or smaller than A4. The detected paper size differs from the paper size set by command or menu.

• The paper size check for manual feeding finds that the paper size is free size.

Registration motor

Paper end sensor

Inlet sensor

Paper sensor

Outlet sensor

Jam Monitor

Top to top

Top to bottom

Bottom to bottom

Checking for paper form

Hopping

Monitoring

paper

input jam

Paper

feed

Paper size check

(paper width)

Monitoring

paper feed jam

Paper size check

(Paper length)

Paper

feed

Monitoring

paper feed jam

Monitoring

paper exit jam

Monitoring paper

feed jam

Paper Feed Timing Chart

41605601TH Rev.2 35 /

Paper Feed Check List

Type of error Monitor Standard value

Paper feed error

Paper feed jam Paper feed jam

Paper size error

Paper exit jam

Paper feed jam

Note:

Paper Length List

Hopping start In sensor on Write sensor on In sensor on Out sensor on In sensor off

In sensor on

Write sensor on

Out sensor on

In sensor off

Out sensor off

Write sensor off

Depends on the paper length Depends on the paper length

Hyphen "-" in the table represents "not checked."

Type Paper length

LETTER

LEGAL 13

LEGAL 14

EXEC

Monarch

COM-9

COM-10

Free

297.0

210.0

257.0

279.4

330.2

355.6

266.7

148.0

190.5

225.4

241.3

220.0

229.0

110.1~355.6

72.0

20.0

140.5

22.2

Check range

Min Max

252.0

165.0

212.0

234.4

285.2

310.6

221.7

103.0

145.5

180.4

196.3

175.0

184.0

65.0

342.0

255.0

302.0

324.4

375.2

400.6

311.7

193.0

235.5

270.4

286.3

265.0

274.0

400.6

Unit : mm

Plus

36.0

68.0

25.0

45.0

22.0

Error

Minus

– – –

45.0

–

Unit : mm

41605601TH Rev.2 36 /

2.5 Cover Open

When the stacker cover is opened, the cover open microswitch on the power supply/sensor board is turned off to cut +5V supply to the high voltage power supply circuit. This results in the interruption of all high-voltage outputs. At the same time, the CVOPN signal is sent to the main control board to notify that the microswitch is off, and the main control board carries out the cover open process.

41605601TH Rev.2 37 /

2.6 Toner Low Detection

• Device The Toner Low Detection device consists of a stirring gear which rotates at a constant rate, a stirring bar and a magnet on the stirring bar. The stirring bar rotation is driven by the link to the gouged portion in the stirring gear.

Magnet Gouged

Stirring Bar Stirring Gear

• Operation Toner Low is detected by monitoring the time interval of the encounter of the magnet set on the sensor plate and the magnet on the stirring bar.

portion

Operation during Toner Full state

• The stirring bar rotates due to the mechanical transmission of energy originating from the interlocking with the stirring gear.

• Even when the magnet on the stirring bar reaches the maximum height, the stirring bar is pushed by the stirring gear, since the other side is being dipped in the toner.

Operation during Toner Low state

• When the stirring bar reaches the maximum height, it falls to the minimum height due to its own weight, since there is no resistance provided by the toner on the other side. Because of this, the time interval during which it is in encounter with the magnet of the sensor plate becomes longer. By monitoring this time interval, Toner Low state can be detected.

Stirring Gear Section

Stirring Bar

Sensor Plate

Toner Sensor

Stirring Bar

Sensor Plate

41605601TH Rev.2 38 /

TONER FULL state

TNRSNS-N

TONER LOW state

TNRSNS-N

• 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 cancelled.

• When there is no change with the toner sensor for 2 cycles (1.7564 sec. × 2) or more, then the

Toner Sensor Alarm is activated.

160 ms < t1 < 0.5 sec

1.7564 sec.

t1 > 0.5 sec.

1.7564 sec.

• The toner sensor is not monitored while the main (drum) motor is in a halt.

41605601TH Rev.2 39 /

3. PARTS REPLACEMENT

This section explains the procedures for replacement of parts, assemblies, and units in the field. Only the disassembly procedures are explained here. For reassembly, reverse the disassembly procedure.

3.1 Precautions for Parts Replacement

(1) Before starting to replace parts, remove the AC cord and interface cable.

(a) Remove the AC cord in the following sequence:

i) Turn off (“o”) the power switch of the printer ii) Disconnect the AC inlet plug of the AC cord from the AC receptacle. iii) Disconnect the AC cord and interface cable from the printer.

(b) Reconnect the printer in the following procedure.

i) Connect the AC cord and interface cable to the printer. ii) Connect the AC inlet plug to the AC receptacle. iii) Turn on (“l”) the power switch of the printer.

Disconnect

OFF

(2) Do not disassemble the printer as long as it is operating normally. (3) Do not remove parts which do not have to be touched; try to keep the disassembly to a minimum. (4) Use specified service tools. (5) When disassembling, follow the laid out sequences. Parts may be damaged if these sequences

are not followed.

(6) Since screws, collars and other small parts are likely to be lost, they should temporarily be

attached to the original positions during disassembly.

(7) When handling IC’s such as microprocessors, ROMs and RAMs, or circuit boards, do not wear

gloves that are likely to generate static electricity.

Reconnect

(8) Do not place printed circuit boards directly on the equipment or floor.

41605601TH Rev.2 40 /

[Service Tools] The tools required for field replacement of printed circuit boards, assemblies and units are listed in

Table 3-1.

Table 3-1 Service Tools

No. Q' ty Application RemarksService Tools

No. 1-100 Philips screwdriver

No. 2-100 Philips screwdriver

No. 3-100 screwdriver

No. 5-200 screwdriver

Digital multimeter

Pliers

Handy cleaner

LED Head cleaner

2~2.5 mm screws

3~5 mm screws

Cleans LED head

41605601TH Rev.2 41 /

3.2 Parts Layout

This section explains the layout of main components of the equipment. [Lower base unit]

Eject roller assy

Diselectrification bar

Spacer bearing L

Stacker cover assy

Back-up roller

View A

Transfer roller

Registration

roller Assy

Pulse motor (main/drum)

Pulse motor (registration)

Spacer bearing R

Fusing unit

Lower base unit

Stacker cover assy

Manual feed guide assy

Toner cartridge (Type 5)

(consumable)

Sub CH-M

Hopping roller shaft

LED head

Hopping roller rubber

Image drum unit (Type 5)

(consumable)

View A

Figure 3-1

41605601TH Rev.2 42 /

[Upper cover unit]

Upper cover

Figure 3-2

41605601TH Rev.2 43 /

[Base unit]

Operator panel assy

High voltage unit /

sensor board

Power supply/

sensor board

(Low voltage)

Cassette guide(L)

assy

DC fan assy

Main control board

Face up stacker assy

Cassette guide (R) assy

Paper cassette

Figure 3-3

41605601TH Rev.2 44 /

3.3 How to Change Parts

This section explains how to change parts and assemblies listed in the disassembly diagram below. In the parts replacement procedure, those parts marked with the part number inside ● with white

letters are RSPL parts.

Printer unit Upper cover assy

(3.3.1) IC card cover

(3.3.2) LED head

(3.3.3) Transfer roller

(3.3.14)

Hopping roller shaft assy (3.3.11)

Stacker cover assy (3.3.12)

Registration roller (3.3.13)

Power supply/sensor board and contact assy (3.3.22)

Operator panel assy (3.3.4)

Manual feed guide assy (3.3.19)

Fusing unit (3.3.15)

Back up roller (3.3.16)

Cassette guide (L) (3.3.23)

Cassette guide (R) (3.3.24)

Face up stacker assy (3.3.8)

Lower base unit (3.3.5)

Pulse motor (main/drum) (3.3.6)

Pulse motor (registration) (3.3.7)

Eject roller assy (3.3.9)

Motor assy (3.3.10)

Sensor plate (inlet) (3.3.17)

Sensor plate (outlet) (3.3.18)

Sensor plate (paper supply) (3.3.20)

M7G-PCB (3.3.21)

Spacer bearing (L/R) (3.3.25)

41605601TH Rev.2 45 /

3.3.1 Upper Cover Assy (1) With the power switch turned off, unplug the AC power cord from the outlet. (2) Disconnect the interface cable 1. (3) Press the knobs 2 on left and right sides and open the stacker cover assy 3. (4) Take out the image drum unit 4. (5) Remove two screws 5, and open the manual feed guide assy 6. Lift the front side of the upper

cover 7 up and unlock the latches at two locations on the back side. Lift and remove the upper cover assy 7.

Notes : 1.

When removing or reinstalling the upper cover, be careful not to get the motor cables tangled or caught.

When reinstalling the screws 5, be sure to direct the screws into preexisting threads.

41605601TH Rev.2 46 /

3.3.2 IC Card Cover (1) Open the IC card cover 1, press it from both sides at the hinges in the directions of arrows shown

below and remove it.

41605601TH Rev.2 47 /

3.3.3 LED Head (1) Press the knobs on left and right sides and open the stacker cover assy 1. (2) Open the hook section on the left side of the stacker cover and remove the LED head 2.

Note:

• Be sure not to touch directly or push on the SLA part of the LED head.

• Do not remove the LED cable 3 from the connector.

• Remove connector 4 and cable 3 together as an assembly from the LED head.

• After mounting the new LED head and resinstalling the cable, set drive time of the LED

head according to the marking on the LED head (see 4.2.1).

SLA

(Seltoc Lens Array)

SLA

41605601TH Rev.2 48 /

3.3.4 Operator Panel Assy (1) Unlock two latches on the upper cover from the rear side, lift the operator panel assy 1 from the

back and remove it.

(2) Remove the Sumi card (operator panel) 2 from the connector (CN1) 3.

Note :

You can remove the operator panel assy while the upper cover installed on the unit. However, it is much easier to remove the panel assy after removal of upper cover.

Rear view

Unlock two latches with a tip of screw driver. For the purpose, insert a driver through faceup paper outlet as shown.

41605601TH Rev.2 49 /

3.3.5 Lower Base Unit (1) Remove the upper cover assy (see 3.3.1). (2) Remove the operator panel assy (see 3.3.4). (3) Remove the face up stacker assy (see 3.3.8). (4) Remove the connecting cables 2 and 3 of the pulse motors from the connectors (DM, RM) of

the M7G-PCB 1. (5) Remove the LED head cables 4 from the connectors (HEAD1). (6) Open the manual feed guide assy, remove six screws 7, then remove the lower base unit 6.

41605601TH Rev.2 50 /

3.3.6 Pulse Motor (Main/Drum) (1) Remove the upper cover assy (see 3.3.1). (2) Remove the lower base unit (see 3.3.5). (3) Remove two screws 1 and remove the pulse motor (main/drum) 2 from the motor bracket 3.

View A

41605601TH Rev.2 51 /

3.3.7 Pulse Motor (Registration) (1) Remove the upper cover assy (see 3.3.1). (2) Remove the lower base unit (see 3.3.5). (3) Remove two screws 1 and remove the pluse motor (registration) 2 from the motor bracket 3.

View A

41605601TH Rev.2 52 /

3.3.8 Face Up Stacker Assy (1) Remove the upper cover assy (see 3.3.1). (2) Remove the operator panel assy (see 3.3.4). (3) Remove the screw 1 and remove the Sumi card (operator panel cable) 2 off the latch section

of face up stacker 4. Remove both the shield plate 3 and face up stacker 4 together.

(4) Unlock the latches at two locations, and remove the face up stacker 4.

41605601TH Rev.2 53 /

3.3.9 Eject Roller Assy (1) Remove the upper cover assy (see 3.3.1). (2) Remove the operator panel assy (see 3.3.4). (3) Remove the face up stacker assy (see 3.3.8). (4) Remove the lower base unit (see 3.3.5). (5) Disengage the eject roller assy 1 from the lower base 2 by pressing the latch section of the eject

roller assy 1 in the direction of the arrow shown below, and remove the eject roller assy 1.

LATCH

41605601TH Rev.2 54 /

3.3.10 Motor Assy (1) Remove the upper cover assy (see 3.3.1). (2) Remove the operator panel assy (see 3.3.4). (3) Remove the face up stacker assy (see 3.3.8). (4) Remove the lower base unit (see 3.3.5). (5) Stand the lower base unit on its side as shown, and unlock two latches, then remove the motor

assy 1.

41605601TH Rev.2 55 /

3.3.11 Hopping Roller Shaft Assy (1) Remove the upper cover (see 3.3.1). (2) Remove the operator panel assy (see 3.3.4). (3) Remove the face up stacker assy (see 3.3.8). (4) Remove the lower base unit (see 3.3.5). (5) Remove the motor assy (see 3.3.10). (6) With the lower base unit 1 standing on its side, remove the one-way clutch gear 2 and the

bearing (A) 3.

(7) Remove the hopping roller shaft assy 4 (the bearing (B) 5 comes off, so be careful not to lose

it).

41605601TH Rev.2 56 /

3.3.12 Stacker Cover Assy (1) Remove the upper cover assy (see 3.3.1). (2) Remove the operator panel assy (see 3.3.4). (3) Remove the face up stacker assy (see 3.3.8). (4) Remove the reset lever R 1. (5) Detach the reset spring 2 from the lower base unit 3, turn the reset lever L 4 in the direction

of arrow A until it stops, and remove it in the direction of arrow B .

(6) Unlock two latches of the lower base unit 3, then remove the stacker cover assy 5.

Note :

When reinstalling the reset lever L 4, fit it onto the guide of the lower base unit 3, turn it in the direction of arrow C while pressing down the shaft of back up roller, and engage the reset lever L 4.

41605601TH Rev.2 57 /

3.3.13 Registration Roller (1) Remove the upper cover (see 3.3.1). (2) Remove the operator panel assy (see 3.3.3). (3) Remove the face up stacker assy (see 3.3.8). (4) Remove the lower base unit (see 3.3.5). (5) Remove the motor assy (see 3.3.10). (6) With the lower base unit standing on its side, remove the one-way clutch gear 1 and the bearing

9. (7) Remove the Registration Gear by unlocing latch of the Gear 4 . (8) Remove the Registration Bearing(L) 3 . (9) Press the registration roller Assy 2 in the direction of arrow A and lift up the left side of it, then

remove the registration roller Assy 2 . (10)Pull out the registration roller Assy 2 in the direction of arrow B . (11)Remove the pressure roller gear 5 by unlockin the lach of the gear 5 . (12)Remove the bearing-Registration L 6 and besring-Registration R 7. (13)Remove the spring 8 from the bearing 6 , 7 .

View A

41605601TH Rev.2 58 /

3.3.14 Roller Transfer Assy (1) With the power switch turned off, unplug the AC cord from the outlet. (2) Open the stacker cover. (3) Release the roller transfer assy 1 by unlocking the latch of the main unit (never apply excessive

force when unlocking the latch).

(4) Lift the right side of the roller transfer assy 1, and shift it to the right side, then pull it out from

the main unit (at this time, the bearings 2 of the left and right sides of the roller transfer assy 1 will also come off).

Unlock

41605601TH Rev.2 59 /

3.3.15 Fusing Unit (1) Remove the upper cover (see 3.3.1). (2) Remove the operator panel assy (see 3.3.4). (3) Remove the face up stacker assy (see 3.3.8). (4) Remove the lower base unit (see 3.3.5). (5) Remove the stacker cover assy (see 3.3.12). (6) Remove four screws 1, lift and remove the fusing unit 2. Caution: Fusing unit may be hot. Use care when handling.

Notes : 1.

When reinstalling or removing the fusing unit, tighten or loosen the screws while holding the fusing unit assy 2 down with your hand (it is being pushed up by back up roller).

When reinstalling the screws 1, be sure to direct the screws into preexisting thread and avoid damaging the threads.

Do not apply excessive torque when tightening the screws 1.

41605601TH Rev.2 60 /

3.3.16 Back-up Roller (1) Remove the fusing unit assy (see 3.3.15). (2) Lift the left side of the back-up roller 1, and pull it out to the left side (at this time, two bearing

holders (back-up) 2 and the bias springs (back-up) 3 and the two ball-bearing 4, washer B 5, washer C 6 will also come off).

41605601TH Rev.2 61 /

3.3.17 Sensor Plate (Inlet) (1) Remove the upper cover (see 3.3.1). (2) Remove the operator panel assy (see 3.3.4). (3) Remove the face up stacker assy (see 3.3.8). (4) Remove the lower base unit (see 3.3.5). (5) Press the clamps of three sensor plates (inlet and paper) 1, and remove them by pressing them

upward from the bottom.

Sensor plate (paper)

Sensor plate (inlet)

41605601TH Rev.2 62 /

3.3.18 Sensor Plate (Outlet), Sensor Wire Assy (1) Remove the upper cover assy (see 3.3.1). (2) Remove the operator panel assy (see 3.3.4). (3) Remove the eject roller assy (see 3.3.9). (4) Remove the face up stacker assy (see 3.3.8). (5) Remove the lower base unit (see 3.3.5). (6) Remove the fusing unit assy (see 3.3.15). (7) Press the clamps of the sensor plate (outlet) 1, and remove the sensor plate by pushing it up. (8) Turn the clamps of the sensor wire assy 2 remove the sensor wire assy from the lower base unit.

41605601TH Rev.2 63 /

3.3.19 Manual Feed Guide Assy (1) Remove the upper cover assy (see 3.3.1). (2) Open the manual feed guide assy 1, and release the engagement on both sides with the main

unit by carefully bending the manual feed guide assy 1.

Note :

When remounting, verify the proper the engagements as shown in the diagram.

Put the post into the groove.

41605601TH Rev.2 64 /

3.3.20 Sensor Plate (Paper Supply) (1) Remove the upper cover assy (see 3.3.1). (2) Remove the operator panel assy (see 3.3.4). (3) Remove the face up stacker assy (see 3.3.8). (4) Remove the lower base unit (see 3.3.5). (5) Press the clamps of the sensor plate (paper supply) 1 to unlock the latch, and remove it from

the base plate 2.

View A

41605601TH Rev.2 65 /

3.3.21 M7G-PCB (1) Remove the upper cover assy (see 3.3.1). (2) Remove the operator panel assy (see 3.3.4). (3) Remove the face up stacker assy (see 3.3.8). (4) Remove the lower base unit (see 3.3.5). (5) Remove the connector (2NDTRAY) 6. (6) Remove three screws 1. (7) Move the M7G-PCB 2 in the direction of arrow to disconnect it from the power supply/sensor

board 3. (8) Remove the connector FAN, and disconnect the fan motor 4. (9) Remove the M7G-PCB 2, together with the PCB guide plate (remove the fan motor 4 at the

same time). (10)

Remove four screws 8 and remove the PCB guide plate 7 from the M7G-PCB 2.

Note :

When reinstalling the M7G-PCB 2 onto the guide plate 7, be careful not to bend the base plate (it is desirable to place a block underneath it to prevent bending).

41605601TH Rev.2 66 /

3.3.22 Power Supply/Sensor Board, High Voltage Unit and Contact Assy (1) Remove the upper cover assy (see 3.3.1).

(2) Remove the lower base unit (see 3.3.5). (3) Remove the M7G-PCB (See 3.3.21). (4) Remove the AC inlet 1 from the base plate 2. (5) Remove the screw 3 and remove the grounding (earth) wire 4.

(6) Remove the Ferite core 9 from the grounding wire. (7) Remove nine screws 5, and remove the power supply/sensor board 6 and contact assy 7

together.

(8) Unlock two latches 8, and remove contact assy 7 from the power supply/sensor board 6. (9) Remove the Insulator plate 9 from the base plate 2.

Note : 1.

Be careful about the sensor (paper supply) when reinstalling the lower base. Make sure that no excessive force is applied to the power supply switch. When installing the power supply/sensor onto the base plate, be careful not to bend

the base plate (it is desirable to place a block underneath it to prevent bending).

View A

41605601TH Rev.2 67 /

3.3.23 Cassette Guide L Assy (1) Remove the paper cassette. (2) Remove the upper cover assy (see 3.3.1). (3) Remove the lower base unit (see 3.3.5). (4) Remove the M7G-PCB (see 3.3.21). (5) Remove the power supply/sensor board (see 3.3.22). (6) Remove two screws 1, and remove the guide rails 2. (7) Remove the screw 3, and remove the cassette guide L assy 9 by shifting it in the direction of

the arrow as shown below. (8) Remove cassette lock lever 4 and torsion spring 5. (9) Remove cassette lock lever spring 8 then remove the sheet link (L) 6 and Pull block 7.

41605601TH Rev.2 68 /

3.3.24 Cassette Guide R Assy (1) Remove the paper cassette. (2) Remove the upper cover assy (see 3.3.1). (3) Remove the lower base unit (see 3.3.5). (4) Remove the M7G-PCB (see 3.3.21). (5) Remove two screws 1, and remove the guide rails 2. (6)

Remove the screw 3, and remove the cassette guide R assy 4 by shifting it in the direction of arrow. (7) Remove the cassette lock lever 5 and torsion spring 6. (8)

Remove the cassette lock lever spring 9, then remove the sheet link (R) 7 and link pull block 8. (9) Remove two screws 0, and remove the square-shaped connector A.

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3.3.25 Spacer Bearing (L/R) (1) Remove the back-up roller (see 3.3.16). (2) Remove spacer bearing (L/R) with a tip of screw driver.

Spacer bearing L Spacer bearing R

41605601TH Rev.2 70 /

4. ADJUSTMENT

This chapter explains adjustment necessary when a part is replaced. This adjustment is made by changing the parameter values set in EEPROM on the main control

board. The status monitor or maintenance utility can be used to change these values. Only servicemen and maintenance personnel can use the maintenance utility. This utility cannot be

made public for printer end users.

4.1 Adjustment Types and Functions

4.1.1 Status Monitor

(For Microsoft Windows)

This status monitor has the following functions:

• Drum counter reset

• Charge roller cleaning

Figure 4-1

(1) Drum counter reset

This function resets the life of the drum counter when the EP unit is replaced. Clicking the "Reset" button resets the life.

(2) Cleaning Page Function

This function cleans the charge roller of the EP unit; it is used when printing is unclear. For details on how to operate this function, refer to "5.2.2".

4.1.2 Engine Maintenance Utility See Appendix C.

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4.2 Adjustment When Replacing a Part

The table below lists the parts that requires adjustment when they are replaced.

Part Replaced Adjustment

Set the LED Head drive time.

LED Head

EP unit Main Control Board

4.2.1 Setting of LED Head Drive Time

Set the LED Head Width Set the LED Head Wire Set the Head type Reset the drum counter.(refer to "User's manual". ) Upload or download EEPROM data

Caution:

When the luminous intensity of a new LED head is the same as that of the old LED head,

do not set the LED head drive time.

Use "LED Head Marking No." in the engine menu tab of the maintenance driver to set the luminous

intensity displayed on the LED head as the LED head drive time. (See Figure 4-2.)

• Luminous intensity of LED head

Luminous intensity display

100

300

Character : ex

This three digits indicate the luminous intensity of the LED head

If there is a "TH"marking, it means about manufacturing location of Thailand.

Figure 4-2

• Changing of LED Head Marking No.

(1) Connect the printer with the PC. (2) Turn on the printer and the PC. (3) Start the maintenance utility on the PC. (4) Choose the LED Head, mounted on the printer, in the List Box of LED Head Marking No.

(See P.133) (5) Press <Entry> button to see up the LED Head for the printer. (6) Press <Exit> button to end.

41605601TH Rev.2 72 /

4.2.2 Uploading and Downloading EEPROM Data When the main control board is replaced, EEPROM data must be reflected on a new main control

board. Use “EEPROM Operations” in the option tab of the maintenance utility to reflect EEPROM data on the new main control board.

Reflect EEPROM data on the new main control board in the following procedures: (1) Check that the printer and PC are connected by the parallel I/F, then execute the maintenance

utility. (2) Click the "Option" button in "Main Menu Dialog". (3) Click the “Upload” button (Upload EEPROM Data) in “EEPROM Operations.” (EEPROM data

read is completed.) (4) The read EEPROM data is displayed in “Dialog” of the maintenance driver. (5) Leave the display of the maintenance driver as is and replace the main control board. (6) Click the “Download” button (Download EEPROM Data) in “EEPROM Operations”. (EEPROM

data write is completed.) Depending on the level of a main control board failure (parallel I/O failure, etc.), however,

EEPROM data may be unable to be uploaded. In such a case, use the maintenance utility to perform the following adjustment after replacing the

main control board:

• Setting the LED head drive time (Section 4.2.1)

• Setting the LED Head Width

• Setting the LED Head Wire

• Setting the Head type

• Setting specifications (ODA/OEL/INT-A/INT-L)

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5. PERIODICAL MAINTENANCE

5.1 Periodical Replacement Parts

The parts are to be replaced periodically as specified below:

Part name Condition for replacement Cleaning Remarks

• Toner cartridge(Type 5) paper have been printed.

• Image drum cartridge

(Type 8)

About 20,000 sheets of paper have been printed. See 1.4. (14)

5.2 Cleaning

Remove any toner or dust accumulated inside the printer. Clean in and around the printer with a piece of cloth when necessary. Use the handy cleaner (service tool) to clean inside the printer.

Note:

5.2.1 Cleaning of LED Lens Array Clean the LED lens array or replace the toner cartridge when white lines or stripes (void, light printing)

are generated vertically down the page, as shown below.

Note:

Do not touch the image drum, LED lens array, or LED head connector block.

The LED lens array must be cleaned with an LED head cleaner included in the

replacement toner kit.

• LED headAbout 2,000(ODA) or 2,500(OEL/INT) sheets of

Consumables

White lines or stripes

(void, light printing)

41605601TH Rev.2 74 /

(1) Set the LED head cleaner to the LED lens array as shown in the figure, then slide the cleaner

back and forth horizontally several times to clean the head.

Note:

Gently press the LED head cleaner onto the LED lens array.

LED head clean pad

LED lens array

(2) Throw the cleaner pad away.

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6. TROUBLESHOOTING PROCEDURES

6.1 Troubleshooting Tips

(1) Check the basic check points written in the user’s manual. (2) Gather detailed failure information as much as possible from the customer. (3) Check the printer under the condition close to that under which the failure occurred.

6.2 Check Points Before Correcting Image Problems

(1) Is the printer running in proper ambient conditions? (2) Are consumables (toner and EP unit) replaced correctly? (3) Are sheets of paper normal? (4) Is the EP unit set correctly?

6.3 Notes When Correcting Image Problems

(1) Do not touch the surface of the OPC drum nor place foreign matter on it. (2) Do not expose the OPC drum to direct sunlight. (3) Do not touch the fuser because it heats up during operation. (4) Do not expose the image drum to light for more than five minutes at room temperature.

6.4 Preparation Before Troubleshooting

(1) Message display

The failure status of printer is displayed on the status monitor of the PC. Take proper action according to the message displayed on the status monitor.

(2) LED indicator

Printer is equipped with three LED. These LED indicates one of the following statuss:

1 2 3

1 Ready LED Indicator 2 Manual Feed LED Indicator 3 Error LED Indicator

41605601TH Rev.2 76 /

LED Functions

Status Error (amber)Ready (green) Remark

Ready During suspending data pro-

Flash 1 cessing (in OFF-LINE) (Data is left in the buffer)

During receiving data or pro-

Flash 2 cessing data

Manual request Low toner Warning change drum Warning

Undefined

Undefined toner low, toner sensor (total page > 30 sheets)

Error (printing Error)

OFF Buffer Overflow

Error

OFF Paper out, Input Jam

Manual Feed (amber)

OFF OFF

OFF

Flash 2 OFF Undefined Undefined

OFF

Undefined Undefined

Undefined

OFF Flash 1 Flash 3 Flash 1

Flash 2

Printing contents of buffer by pressing switch two seconds. Clearing buffer by pressing switch five seconds.

Recovered by pressing and releasing a switch

Recovered by pressing and releasing a swith and the printing can be continued.

Error

OFF Paper Jam (Paper Size Check Error, Feed Jam, Exit Jam)

Error Cover Open Program error

OFF

Flash 2 (Watch Dog Timer Error, Controller Error)

Hardware error (fatal error)

Flash 3 (ROM/RAM error, fuser error, thermister error and toner sensor error) (total page < 30)

During printer resetting. During initializing. During initializing EEPROM Drum counter being reset

Flash 2

ON and then OFF

Flash 2, 3 times

Flash 2, 2 times

Flash 1: Slow blinking Flash 2: Blinking Flash 3: Fast blinking

OFF

OFF Flash 2

Flash 3

OFF ON and then OFF Flash 2, 3 times Flash 2, 2 times

Flash 2

Flash 2 Flash 2

Flash 3

OFF ON and then OFF Flash 2, 3 times Flash 2, 2 times

The printing can be continued by cover open/close

Re-power on

Service call even if the printer cannot recover from one of these errors.

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6.5 Troubleshooting

If a trouble occurs in the printer, troubleshoot according to the following procedures:

Trouble

Trouble indicated by

the message displayed

on the status monitor.

Image problem (or

trouble not displayed on

the status monitor)

6.5.1 Status Monitor Message List Table 6-1 lists the statuses and troubles to be displayed on the status monitor in the message format.

Troubleshoot according to

"Status Monitor Message List"

(See Section 6.5.1.)

Perform detailed

troubleshooting according

to the troubleshooting flow.

(See Section 6.5.2.)

Troubleshoot according to

Section 6.5.3.

41605601TH Rev.2 78 /

Remedy

Be sure to reset the drum counter after replacing the I/

D unit.)

Table 6-1

Normal operation

Display Content

Warming-up status

Online (ready) status

Code

10003

10001

Normal operation

Install the I/D Unit or replace the toner sensor.

Power save status

The toner amount of the toner cartridge is small.

The I/D unit is not installed or the toner sensor is

10094

10006

10093

Change the I/D Unit and reset Drum counter see Section 4.1.1 (1)

faulty.

Life of I/D drum

40093

Note:

Replace the I/D unit.

(

The paper is in the manual feed mode.

10097

Normal operation

X=0, Non Warning

X=1, Toner Low

X=2, 3 Change Drum

X=0, Non Warning

X=1, Toner Low

Printing in progress

Ejection in progress

10098

10099

Normal operation

Set the requested paper in the manual feed mode.

X=2, 3 Change Drum

Request the paper to be set in the manual feed

mode.

The paper sizes are as follows:

Executive, Letter, Legal 14, Legal 13, A4, A5, A6,

B5, Monarch, DL, C5, COM-10, COM-9

xx: Paper size in the tray being selected

411xx

Status Message

Warming Up

Online (Ready)

Power Save Mode

Toner Low

Toner Sensor

Change Drum

Manual Paper In

Printing In Progress

Ejection In Progress

Manual Request

Executive

Letter

Legal 14

Legal 13

Monarch

COM-10

COM-9

7. WIRING DIAGRAM

OVP

HVON-N

30V

OVL

WRSNS-N

PSIN1-N

SCLK

SQCR-N

CBISEL

12V

HEAT-N

30V

OVL

DOUT

DIN

CVOPN-N

TH-CMP

DBSEL

OPTIONCENT

FAN

RMPH1-P

RMPH1-N

RMPH2-P

RMPH2-N

Registration Motor

DMPH1-P

DMPH1-N

DMPH2-P

DMPH2-N

Main (Drum) Motor

DC Fan

FAN POW

FANALM-N

PANEL

POWER

Centronics Parallel I/F

USB

USB Interface

Option Board

Inlet Sensor I

Outlet Sensor

Paper End Sensor

Toner Sensor

Paper Sensor

Inlet Sensor II

Main Control Board

M7G-PCB

Operator

Panel

LED

Head

A10

A11

A12

A13

B10

B11

B12

B13

Option Feeder I/F

+5V

READY

PAPER

ALARM

SW-N

0VL

HDSTB4-N

HDSTB3-N

HDSTB2-N

HDSTB1-N

HDDLD-P

HDCLK-P

HDD0-P

0VLOGIC

0VLED

Filter

Circuit

Low Voltage

Supply Circuit

(AC-DC Converter)

High

Voltage

Supply

Circuit

Sub-CH

+5V

THERM

Contact Assy

Transfer Roller

Charge Roller

Sub-Charge Roller

Image Drum

Developing Roller

Toner Supply

Roller

Power Supply/Sensor Board

Thermostat

Thermistor

Heater

Cleaning

Roller

+5V

Cover Open SW

+5V

ACSW

HEATON

To Heater

2ND TRAY

HEAD1

CN3

+38V

7.1 Interconnect Signal Diagram

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7.2 PCB Layout and Connector Signal List

(1) Main Control Board (M7G-PCB)

Printer front side

2 1

50 99

2114

6 4 7 8

HEAD1

876

41 4 1

3 1 2 5

100

OPTION

50 1

100 51

OPTION

ENVELOPE

246

135

PANEL

2NDTRAY

POWER

FAN

CENT

18 36

18 1

36 19

1 19

USB

1 2 3

12 4

LED Head

Operator panel

Printer front side

Contact face

Printer front side

6 – 1

14 – 1

41605601TH Rev.2 100 /

Okidata OKIPAGE 14e Maintenance Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Document Revision History

Contents

1. CONFIGURATION

2. OPERATION DESCRIPTION

3. PARTS REPLACEMENT

4. ADJUSTMENT

5. PERIODICAL MAINTENANCE

6. TROUBLESHOOTING PROCEDURES

7. WIRING DIAGRAM