OKI 10e Maintenance Manual

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OKIP AGE 10e LED Page Printer

Maintenance Manual

ODA / OEL / INT

1999.11. 30 Rev.2

41154001TH Rev.2 1 / 173

Revision History Table

Corrected items

Rev.No. Date

1 1999.10.22 ISSUE E5 Miyashita 2 1999.11.30 Table 8-1 188 Add No.50. E5 Otake

No. Page Description of change change

Person in

41154001TH Rev.2 2 /

PREFACE

This Maintenance Manual describes the field maintenance methods for OKIPAGE 10e 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.

41154001TH Rev.2 3 /

Contents

1. CONFIGURATION ............................................................................................. 77

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

1.2 Printer Configuration ...................................................................................... 9

1.3 Optional Configuration.................................................................................. 10

1.4 Specification ................................................................................................. 12

1.5 Safety Standards.......................................................................................... 14

1.5.1Certification Label ...................................................................................................... 14

1.5.2Warning Label............................................................................................................ 14

1.5.3Warning/Caution Marking .......................................................................................... 15

2. OPERATION DESCRIPTION............................................................................. 16

2.1 Main Control Board ...................................................................................... 18

2.2 Power Supply/Sensor Board ........................................................................ 19

2.3 Electrophotographic Process ....................................................................... 21

2.3.1 Electrophotographic Process Mechanism ................................................................ 21

2.3.2 Electrophotographic Process .................................................................................... 24

2.3.3 Process Operation Descriptions ............................................................................... 27

2.4 Paper Jam Detection.................................................................................... 37

2.5 Cover Open .................................................................................................. 39

2.6 Toner Low Detection..................................................................................... 40

3. PARTS REPLACEMENT.................................................................................... 42

3.1 Precautions for Parts Replacement.............................................................. 42

3.2 Parts Layout ................................................................................................. 44

3.3 How to Change Parts ................................................................................... 47

3.3.1 Upper Cover Assy..................................................................................................... 48

3.3.2 IC Card Cover........................................................................................................... 49

3.3.3 LED Head ................................................................................................................. 50

3.3.4 Operator Panel Assy................................................................................................. 51

3.3.5 Lower Base Unit ....................................................................................................... 52

3.3.6 Pulse Motor (Main/Drum).......................................................................................... 53

3.3.7 Pulse Motor (Registration) ........................................................................................ 54

3.3.8 Face Up Stacker Assy .............................................................................................. 55

3.3.9 Eject Roller Assy....................................................................................................... 56

3.3.10 Motor Assy.............................................................................................................. 57

3.3.11 Hopping Roller Shaft Assy ...................................................................................... 58

3.3.12 Stacker Cover Assy ................................................................................................ 59

3.3.13 Registration Roller .................................................................................................. 60

3.3.14 Roller Transfer Assy................................................................................................ 61

3.3.15 Fusing Unit..............................................................................................................62

3.3.16 Back-up Roller ........................................................................................................ 63

3.3.17 Sensor Plate (Inlet) ................................................................................................. 64

3.3.18 Sensor Plate (Outlet) .............................................................................................. 65

3.3.19 Manual Feed Guide Assy........................................................................................ 66

3.3.20 Sensor Plate (Paper Supply) .................................................................................. 67

3.3.21 M5G-PCB ............................................................................................................... 68

3.3.22 Transformer ............................................................................................................ 69

3.3.23 Power Supply/Sensor Board and Contact Assy...................................................... 70

3.3.24 Cassette Guide L Assy ........................................................................................... 71

3.3.25 Cassette Guide R Assy........................................................................................... 72

3.3.26 Spacer Bearing (L/R) .............................................................................................. 73

41154001TH Rev.2 4 /

4. ADJUSTMENT ................................................................................................... 74

4.1 Adjustment Types and Functions ................................................................. 74

4.1.1 Status Monitor........................................................................................................... 74

4.1.2 Engine Maintenance Utility ....................................................................................... 75

4.2 Adjustment When Replacing a Part ............................................................. 75

4.2.1 Setting of LED Head Drive Time............................................................................... 75

4.2.2 Uploading and Downloading EEPROM Data............................................................ 76

5. PERIODICAL MAINTENANCE........................................................................... 77

5.1 Periodical Replacement Parts ...................................................................... 77

5.2 Cleaning ....................................................................................................... 77

5.2.1 Cleaning of LED Lens Array ..................................................................................... 77

5.2.2 Cleaning Page Function ........................................................................................... 79

6. TROUBLESHOOTING PROCEDURES............................................................. 80

6.1 Troubleshooting T ips .................................................................................... 80

6.2 Check Points Before Correcting Image Problems........................................ 80

6.3 Notes When Correcting Image Problems..................................................... 80

6.4 Preparation Before Troubleshooting............................................................. 80

6.5 Troubleshooting............................................................................................ 82

6.5.1 Status Monitor Message List .................................................................................... 82

6.5.2 Status Message Troubleshooting ............................................................................. 86

6.5.3 Image Troubleshooting ............................................................................................. 95

7. WIRING DIAGRAM ......................................................................................... 104

7.1 Interconnect Signal Diagram ...................................................................... 104

7.2 PCB Layout and Connector Signal List ...................................................... 105

7.3 Resistance Check .......................................................................................114

8. PARTS LIST ......................................................................................................116

Appendix A RS-232C SERIAL INTERFACE (option) ............................................. 123

Appendix B CENTRONICS PARALLEL INTERFACE............................................ 126

APPENDIX C MAINTENANCE UTILITY GUI MANUAL (OKIPAGE 10e) .............. 130

APPENDIX D MULTI-PURPOSE FEEDER ........................................................... 134

1. OUTLINE...................................................................................................... 134

1.1 Functions.............................................................................................. 134

1.2 External View and Component Names ................................................ 134

2. MECHANISM DESCRIPTION...................................................................... 135

2.1 General Mechanism ............................................................................. 135

2.2 Hopper Mechanism .............................................................................. 135

3. PARTS REPLACEMENT.............................................................................. 136

3.1 Precautions Concerning Parts Replacement ....................................... 136

3.2 Parts Layout ......................................................................................... 138

41154001TH Rev.2 5 /

3.3 Parts Replacement Methods ................................................................ 139

3.3.1 Link ......................................................................................................................... 140

3.3.2 Separator ................................................................................................................ 141

3.3.3 OLEV-11-PCB ......................................................................................................... 142

3.3.4 Pulse Motor............................................................................................................. 143

3.3.5 Planet Gear............................................................................................................. 144

3.3.6 Roller-A and B......................................................................................................... 145

4. TROUBLESHOOTING ................................................................................. 146

4.1 Precautions Prior to the Troubleshooting ............................................. 146

4.2 Preparations for the Troubleshooting ................................................... 146

4.3 Troubleshooting Method....................................................................... 147

4.3.1 LED Status Message List ....................................................................................... 147

5. CONNECTION DIAGRAM ........................................................................... 149

5.1 Interconnection Diagram ...................................................................... 149

5.2 PCB Layout .......................................................................................... 150

6. PARTS LIST ................................................................................................. 151

APPENDIX E HIGH CAPACITY SECOND

PAPER FEEDER MAINTENANCE ................................................. 153

1. OUTLINE...................................................................................................... 153

1.1 Functions.............................................................................................. 153

1.2 External View and Component Names ................................................ 153

2. MECHANISM DESCRIPTION...................................................................... 154

2.1 General Mechanism ............................................................................. 154

2.2 Hopper Mechanism .............................................................................. 154

3. PARTS REPLACEMENT.............................................................................. 155

3.1 Precautions Concerning Parts Replacement ....................................... 155

3.2 Parts Layout ......................................................................................... 157

3.3 Parts Replacement Methods ................................................................ 158

3.3.1 Stepping Motor (Hopping) ............................................................................... 159

3.3.2 TQSB-2 PCB ................................................................................................... 161

3.3.3 Hopping Roller Shaft Assy and One-way Clutch Gear .................................... 161

4. TROUBLESHOOTING ................................................................................. 162

4.1 Precautions Prior to the Troubleshooting ............................................. 162

4.2 Preparations for the Troubleshooting ................................................... 162

4.3 Troubleshooting Method....................................................................... 163

4.3.1 LED Status Message List ................................................................................ 163

5. CONNECTION DIAGRAM ........................................................................... 165

5.1 Interconnection Diagram ...................................................................... 165

5.2 PCB Layout .......................................................................................... 166

6. PARTS LIST ................................................................................................. 167

41154001TH Rev.2 6 /

1. CONFIGURATION

1.1 System Configuration

OKIPAGE 10e 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.

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Paper

Cassette

*High Capacity Second Paper

Feeder

Operator Panel

Paper Feeding Mechanism

(First Tray Unit)

Engine Unit

Face Up

Stacker

Face

*Multi Purpose

Feeder

Centronics

Electrophotographic

Processing Unit

Main Control Board

Down

Stacker

Power Supply

and Sensor Board

* : Optional

RS-232C

Memory*

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

41154001TH Rev.2 8 /

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

Power supply/sensor board

Fusing unit

Toner-cartridge(Type 5)

(consumable)

Image drum unit(Type 5)

(consumable)

Legal/universal paper cassette

Main control board

Figure 1-2

41154001TH Rev.2 9 /

1.3 Optional Configuration

The options shown below are available for use with OKIPAGE 10e. These are available separately from the printer unit.

(1) High Capacity Second Paper Feeder

(2) Multi Purpose Feeder

(3) 1MB Memory Expausion Board

41154001TH Rev.2 10 /

(4) RS-232C Serial Interface Board

(5) DRAM SIMM Memory

DRAM SIMM memory is available with memory of 2, 4, 8, 16 or 32MB. The access time of SIMM memories are 60ns, 70ns, 80ns, and 100ns.

(6) Flash SIMM

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

41154001TH Rev.2 11 /

1.4 Specification

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

(3) Weight Approx. 10 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: 3.87” to 8.5” (116 to 216 mm) – Length: 5.83” to 14” (148 to 355.6 mm)

– Automatic feed: 16 to 28 lbs (60 to 135 g/m2) – Manual feed: Label, OHP paper (transparency)

Envelope (24 to 28lbs)

(6) Printing speed Continuous printing: 10 pages per minute with Letter size

paper. [Except Second Paper Feeder (8.8PPM), Multi purpose Feeder (8.3ppm)]

Warm-up time: First page print time: 12 seconds typical for the Letter size

60 seconds typical at room temperature [68˚F (20˚C), AC 120/230 V].

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

300 x 1200 dots/inch

41154001TH Rev.2 12 /

(10) Power input 120 VAC + 5.5%, -15%

230 VAC ± 10%

(11) Power consumption Peak: Approx. 460W

Typical operation: Approx. 215W Idle: Approx. 61W Power save mode: Approx. 18W

(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

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.

(13) Noise During operation: 50 dB (A) or less

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

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

Image drum cartridge 20,000 (at continuouts printing)

14,000 (3 page/job) without Power Save

˚F

(˚C)

%RH

˚F

(˚C)

˚F

(˚C)

41154001TH Rev.2 13 /

1.5 Safety Standards

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

INT AC : 230V model

ODA AC : 120V model ODA 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.

41154001TH Rev.2 14 /

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

CAUTION

ATTENTION ATENCÃO CUIDADO CUIDÃDO

WARNING

AVERTISSEMENT ADVERTENCIA HEATSINK AND TRANSFORMER PRESENT RISK OF ELECTRIC SHOCK TEST BEFORE TOUCHING

ENGLISH Heatsink 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.

* No fuse is mounted here for 200V series

41154001TH Rev.2 15 /

2. OPERATION DESCRIPTION

OKIPAGE 10e 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 10e block diagram is shown in Figure 2-1.

41154001TH Rev.2 16 /

1MB Memory Board

(Option)

RS232C Interface Board

(Option)

Main Control Board

Program & Font ROM

6MB Mask ROM

EEPROM

Centronics parallel I/F

74LS07

+8V -8V 0V +5V+38V

Reset circuit

For optional board

DATA

BUS

(32bit)

1 Chip CPU

Resident RAM

1M x 16 bit. DRAM

(4MB)

Drum motor &

Registration motor

drive circuit

FAN Driver

HEAT ON

Multi-Purpose

Feeder (Option)

High Capacity Second Paper

Feeder (Option)

Operation Panel

Drum Motor

MMRegistration Motor

FAN

FAN ALM

LED Head

Power Supply Board

Inlet sensor 1

Inlet sensor 2

Paper sensor

Outlet sensor

Paper out sensor

Toner low sensor

Cover

open

switch

Low voltage

generation circuit

LSI

transformer

Charge roller

Transfer roller

High voltage

generation

circuit

Fusing temperature

control circuit

Heater drive

circuit

Filter circuit AC IN

Developping

roller

Toner supply

roller

Cleaning

roller

Thermistor

Heater

Figure 2-1 OKIPAGE 10e Block Diagram

41154001TH Rev.2 17 /

2.1 Main Control Board

The main control board consists of a single chip CPU, two program/font ROMs, two 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, 28.24-MHz clock, with input frequency from a 7.06-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

4Kbit 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.

41154001TH Rev.2 18 /

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

+38 V

+8 V –8 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

CH DB SB TR CB

-1.3 KV

-265 V/+300 V

-500 V/ 0 V +500 V to +3.5 KV/-1100 V +400 V/-1350 V

Logic circuit supply voltage and LED head supply voltage Motor and fan drive voltage and source voltage for high-voltage supply RS-232C line voltage RS-232C line voltage

Voltage applied to charging roller Voltage applied to developing roller Voltage applied to toner supply roller Voltage applied to transfer roller Voltage applied to cleaning roller

Variable

(3) Photosensor

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

41154001TH Rev.2 19 /

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.

Intel sensor 2

Detects the paper width.

ON: A4 or larger

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

41154001TH Rev.2 20 /

Detects the lack of toner.

- - - - -

2.3 Electrophotographic Process

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.

41154001TH Rev.2 21 /

Paper cassette Eject sensor lever

Eject roller assy Heat roller Charge roller Developing 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

41154001TH Rev.2 22 /

Figure 2-3

(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 oneway 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=165°C, medium light=170°C, medium=175°C, medium heavy and heavy=195°C; manual feeding and power envelope feeder: light=175°C, medium light=180°C, medium=185°C, medium heavy=190°C, heavy=195°C, transparency = 160°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.

41154001TH Rev.2 23 /

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.

41154001TH Rev.2 24 /

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

41154001TH Rev.2 25 /

Feed stopIN Sensor OFFFeed start

OUT Sensor OFF

PRDY-N

PRINT-N

DM-ON-N

RM-ON

INSNS

OUTSNS-N

Figure 2-5

41154001TH Rev.2 26 /

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 one-way bearing, so turning any of these gears in the reverse direction will not transmit the motion to the corresponding roller.

41154001TH Rev.2 27 /

(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

41154001TH Rev.2 28 /

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.

Power

supply

Charge roller

Image drum

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

-1300-550 [V]

applied voltage

41154001TH Rev.2 29 /

(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

Power supply

Charge roller

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

41154001TH Rev.2 30 /

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.

(V)

–750

Image drum

surface potential

–100

Charged part

Light

from LED

Part

irradiated

LED

Charged

part

41154001TH Rev.2 31 /

(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

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).

41154001TH Rev.2 32 /

Exposed

part

-100V

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

41154001TH Rev.2 33 /

(5) Transfer

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.

Image drum

Transfer roller

Paper

Power

supply

41154001TH Rev.2 34 /

(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 400W 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=165°C, medium light=170°C, medium=175°C, medium heavy and heavy=195°C/ manual feeding and power envelope feeder: light=175°C, medium light=180°C, medium=185°C, midium heavy=190°C, heavy=195°C, transparency = 160°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.

Separation claw

Heater

Heater roller

Thermistor

Back-up roller

Pressure Spring

41154001TH Rev.2 35 /

(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 10 or more, and 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.

41154001TH Rev.2 36 /

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)

Monitoring

paper feed jam

Paper Feed Timing Chart

Paper

feed

Monitoring

paper

feed jam

Monitoring

paper exit jam

41154001TH Rev.2 37 /

Paper Feed Check List

Type of error Monitor Standard value

Plus

Error

Minus

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

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

A4 A5 B5

LETTER LEGAL 13 LEGAL 14

EXEC

Monarch

COM-9

COM-10

DL C5

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

36.0

22.0

25.0

45.0

22.0

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

– – –

45.0

45.0 –

Unit : mm

41154001TH Rev.2 38 /

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.

41154001TH Rev.2 39 /

2.6 Toner Low Detection

Toner Sensor

Sensor Plate

Stirring Gear Section

Stirring Bar

Sensor Plate

Stirring Bar

• 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.

41154001TH Rev.2 40 /

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 (2.63 sec. x 2) or more, then the Toner Sensor Alarm is activated.

160 ms < t1 < 0.8 sec

2.63 sec.

t1 > 0.8 sec.

2.63 sec.

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

41154001TH Rev.2 41 /

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.

41154001TH Rev.2 42 /

[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

41154001TH Rev.2 43 /

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

Pulse motor (main/drum)

Pulse motor (registration)

Spacer bearing R

Fusing unit

Stacker cover assy

Lower base unit

LED head

View A

Manual feed guide assy

Toner cartridge (Type 5)

(consumable)

Hopping roller shaft

Hopping roller rubber

Image drum unit (Type 5)

(consumable)

Figure 3-1

41154001TH Rev.2 44 /

[Upper cover unit]

Upper cover

Figure 3-2

41154001TH Rev.2 45 /

[Base unit]

Power supply/ sensor board

Transformer

Operator panel assy

Face up stacker assy

Cassette guide(L)

DC fan assy

Main control board

Cassette guide (R)

Paper cassette

Figure 3-3

41154001TH Rev.2 46 /

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 (3.3.23)

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) (3.3.24)

Cassette guide (R) (3.3.25)

Face up stacker assy (3.3.8)

Lower base unit (3.3.5)

Transformer (3.3.22)

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)

M5G-PCB (3.3.21)

Spacer bearing (L/R) (3.3.26)

41154001TH Rev.2 47 /

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.

41154001TH Rev.2 48 /

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.

41154001TH Rev.2 49 /

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

41154001TH Rev.2 50 /

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.

41154001TH Rev.2 51 /

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 M5G-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

41154001TH Rev.2 52 /

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

View A

41154001TH Rev.2 53 /

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

View A

41154001TH Rev.2 54 /

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.

41154001TH Rev.2 55 /

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

LATCH

41154001TH Rev.2 56 /

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.

41154001TH Rev.2 57 /

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).

41154001TH Rev.2 58 /

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.

41154001TH Rev.2 59 /

3.3.13 Registration Roller (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 standing on its side, remove the one-way clutch gear 1. (7) Press the registration roller 2 in the direction of arrow A and lift up the left side of it, then

remove the registration roller 2 and the bearing (registration) 3.

(8) Pull out the registration roller 2 in the direction of arrow B .

View A

41154001TH Rev.2 60 /

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

41154001TH Rev.2 61 /

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 stacker cover assy (see 3.3.12). (5) 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.

41154001TH Rev.2 62 /

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 bushings

(back-up) 2 and the bias springs (back-up) 3 will also come off).

41154001TH Rev.2 63 /

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)

41154001TH Rev.2 64 /

3.3.18 Sensor Plate (Outlet) (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.

41154001TH Rev.2 65 /

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.

41154001TH Rev.2 66 /

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

41154001TH Rev.2 67 /

3.3.21 M5G-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 M5G-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 M5G-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 M5G-PCB 2.

Note :

When reinstalling the M5G-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).

41154001TH Rev.2 68 /

3.3.22 Transformer (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 connectors (CN1 and CN2). (5) Remove two screws 1, and remove the transformer 2.

Note :

When reinstalling the transformer, be sure to lay the AC and transformer’s primary side cables under the divider (see view A diagram below).

AC Inlet

Transformer

AC Switch

View A

41154001TH Rev.2 69 /

3.3.23 Power Supply/Sensor Board 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 M5G-PCB (See 3.3.21). (4) Remove the transformer (see 3.3.22). (5) Remove the AC inlet 1 from the base plate 2. (6) Remove the screw 3 and remove the grounding (earth) wire 4. (7) Remove three 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.

Notes : 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

41154001TH Rev.2 70 /

3.3.24 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 M5G-PCB (see 3.3.21). (5) Remove the transformer (see 3.3.22). (6) Remove the power supply/sensor board (see 3.3.23). (7) Remove two screws 1, and remove the guide rails 2. (8) Remove the screw 3, and remove the cassette guide L 9 by shifting it in the direction of the

arrow as shown below. (9) Remove cassette lock lever 4 and torsion spring 5. (10) Remove cassette lock lever spring 8 then remove the sheet link (L) 6 and Pull block 7.

41154001TH Rev.2 71 /

3.3.25 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 M5G-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 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.

41154001TH Rev.2 72 /

3.3.26 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

41154001TH Rev.2 73 /

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".

41154001TH Rev.2 74 /

4.1.2 Engine Maintenance Utility See Appendix C

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.

41154001TH Rev.2 75 /

(4) Choose the LED Head, mounted on the printer, in the List Box of LED Head Marking No. (See

P.130) (5) Press <Entry> button to see up the LED Head for the printer. (6) Press <Exit> button to end.

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)

41154001TH Rev.2 76 /

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)

• Image drum cartridge (Type 5)

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 sheets of paper have been printed.

Consumables Consumables

White lines or stripes (void, light printing)

41154001TH Rev.2 77 /

(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.

41154001TH Rev.2 78 /

5.2.2 Cleaning Page Function There is a charge roller cleaning function with this printer, which can be executed by the user. (1) While the printer is in off-line mode, press the key for at least 5 seconds. The printer enters

the cleaning mode. (2) The Ready lamp and Manual lamp blink. (3) Insert a sheet of paper A4 or letter size into the manual feeder slot. (4) Toner attached to the image drum is transferred onto the inserted sheet, and the sheet is

ejected with the toner residues printed. (5) The printer returns to off-line mode.

41154001TH Rev.2 79 /

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 display

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

41154001TH Rev.2 80 /

LED Functions

Status Error (red) Ready (amber) RemarkManual Feed (amber)

Ready During suspending data proc-

essing (in OFF-LINE) (Data is left in the buffer)

During receiving data or processing data

Manual request Low toner Warning

Change drum, toner low, toner sensor (total page > 30 sheets)

Error (printing Error) Buffer Overflow, Print Overrun

Error Paper out, Input Jam

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

Undefined Undefined

Undefined

OFF Flash 1 Flash 1

Flash 2

OFF OFF

OFF

Flash 2 OFF Undefined

OFF

ON Flash 1

Flash 2

Undefined Undefined Undefined

OFF

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.

The printing can be continued by cover open/close

Error Cover Open Program error

(Watch Dog Timer Error, Controller Error)

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

During printer resetting. During initializing. During initializing EEPROM

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

Flash 2 Flash 2

Flash 3

OFF ON and then OFF Flash 2 until Ready

OFF Flash 2

Flash 3

OFF ON and then OFF Flash 2 until Ready

OFF Flash 2

Flash 3

Flash 2 ON and then OFF Flash 2 until Ready

Re-power on

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

41154001TH Rev.2 81 /

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.

41154001TH Rev.2 82 /

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

D unit.)

Table 6-1

Normal operation

Display Content Remedy

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.

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

10098

Normal operation

Set the requested paper in the manual feed mode.

X=2, 3 Change Drum

Ejection in progress

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

10099

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 13A6A5A4B5

Monarch

COM-10DLC5

COM-9

Category

Paper size error

40077

Paper Input Jam

Paper jam

40078

Paper Feed Jam

40079

Paper Exit Jam

40019

ID Not Installed

40021

Cover Open

Cover open

30097

Page Buffer Overflow

Buffer overflow

30017

Print Over Run

Program ROM Check Error

Device configuration error

Resident RAM Check Error

41154001TH Rev.2 84 /

Replace the main control board. (When replacing the main

control board, also adjust EEPROM data.) (See Section 4.2.4.)

Check the connection of the Option RAM PC board. If the option

RAM PC board is faulty, replace it.

See Section 6.5.2 4.

Replace the heater Assy.

To release the error display, turn on the power supply again.

Replace the main control board.

To release the error display, turn on the power supply again.

Replace the main control board.

Display Content Remedy

An error occurred during EEPROM check.

Table 6-1 (Cont'd)

Code

EEPROM Check Error

Category Status Message

Device configuration error

An error occurred during option RAM check.

Option RAM Check Error

A heater timeout error occurred.

The thermistor is open.

A thermistor short occurred.

A watchdog timeout occurred.

40084

Fuser Error

Thermister Open Check Error

Thermister Short Check Error

Watch Dog Timeout Error

A motor timeout occurred.

Motor Timeout Error

41154001TH Rev.2 85 /

6.5.2 Status Message Troubleshooting If the problems cannot be corrected by using the status message/problem list, follow the

troubleshooting flowcharts given here to deal with them.

No.

Trouble

Flowchart number The printer does not work normally after the power is turned on. Jam alarm

Paper input jam Paper feed jam Paper exit jam

Paper size error Fusing unit error SSIO (Synchronous Serial Input/Output) error I/F timeout

(no response) between the printer and an optional tray (High Capacity Second Paper Feeder, Power Envelope Feeder).

Fan error

-1

-2

-3

41154001TH Rev.2 86 /

1 The printer does not work normally after the power is turned on.

• Turn the power off, then back on.

• Is the Power LED ( ) lamp on?

• No Is the AC cord being connected properly?

• No Connect the AC cord properly.

• Yes Is +5 V being applied between Pins 11 and 21 of POWER connector on the main control board?

Pin 21 : 0 V Pin 11 : +5 V

• No Is the connection between POWER connector on the main control board and connector CN3 on the power supply/sensor board being made properly?

No Correct the connection.

• Yes Go to 1-1.

• Yes Is +8 V being applied between Pins 23 and 24 (GND) of POWER connector? Pin 23 : 0 V Pin 24 : +8 V

• No Go to A

• Yes Is the flexible cable for the operator panel assy being connected to the PANEL

connector on the control board and the connector CN1 on the OPP board properly?

• No Connect the flexible cable properly.

• Yes Replace the operator panel assy or flexible cable.

• Has the problem been solved?

• No Replace the main control board.

• Yes End

• Yes Is the Ready LED ( ) lamp on?

• No Replace the main control board.

• Yes End

1-1

41154001TH Rev.2 87 /

• Take the measurement of the following voltage readings at connector CN2 on the power supply/sensor board:

Voltage between Pins 1 and 3: ... about 40 V AC Voltage between Pins 5 and 6: ... about 9.2 V AC Are the voltages within the normal range?

• Yes Is fuse F3 on the power supply/sensor board blown?

• No Replace the power supply/sensor board.

• Yes Replace fuse F3 (if it blows again, check the resistance of the registration and main/drum motors. If it is faulty, replace motors or replace the power supply/ sensor board or main control board).

• No Is the AC input voltage output between Pins 1 and 2 of connector CN1 on the power supply/sensor board normal?

• Yes Replace the AC transformer.

• No Is fuse F1 or F2 on the power supply/sensor board blown?

• No Replace the power supply/sensor board.

• Yes Replace blown fuse F1 or F2 (if is blows again, replace the power supply/sensor

board).

ACIN

L FG N

Fuse Ratings

AC Input

Fuse

F1 F2 F3

Filter

Circuit

120 V 230 V

125 V 6.3 A 125 V 1.6 A 125 V 3.15A

Figure 6-1 Low-voltage Power Supply Block Diagram

250 V 5 A

–

250 V 2.5A

Power supply/sensor board

CN1 CN2

Thermal Fuse

1, 2

3, 4

AC Transformer

8 Rectifying/

Smooting

Circuit

+38 V

Smoothing

Circuit

+5 V

Stabilizing

Circuit

+38 V

+8 V

-8 V

17, 18 11, 12, 13, 14

+5 V

0 V

CN3

9, 15, 16

41154001TH Rev.2 88 /

[JAM error]

Outlet sensor

Exit roller

Heat roller

Transfer roller

Paper sensor

Registration roller

Inlet sensor 1

Inlet sensor 2

Toner sensor

Paper end sensor

Hopping

roller

Paper feeding direction

2-1 Paper input jam

• Does the JAM error occur when the power is turned on?

• Yes Is the paper at the inlet sensor?

• Yes Remove the paper.

• No Is the operation of the inlet sensor plate normal (moves freely when it is touched)?

• No Replace the inlet sensor plate.

• Yes Clean the inlet sensor on the power supply/sensor board, or replace the power supply/sensor board.

• No Does the JAM alarm occur after paper feeding?

• Yes Is the paper fed to the inlet sensor plate?

• Yes Is the operation of the input sensor plate normal (moves freely when it is touched)?

• No Replace the inlet sensor plate.

• Yes Clean the inlet sensor on the power supply/sensor board or replace the power supply/sensor board.

• No Replace the hopping roller rubber or paper cassette.

• No Is the hopping roller rotating?

• Yes Set the paper tray properly.

• No Is the registration motor rotating?

• Yes Replace the one-way clutch gear of the hopping roller assembly.

• No Is RM connector on the main control board being connected properly?

• No Connect RM connector properly.

• Yes Is the coil resistance (normal resistance: both between Pins 1 and 2, as well as Pins 3 and 4 are about 18.6 Ω) of the registration motor normal?

• No Replace the registration motor.

• Yes Replace the main control board.

41154001TH Rev.2 89 /

[JAM error]

2-2 Paper feed jam

• Does the paper feed jam occur when the power is turned on?

• Yes Is the paper on the paper sensor plate?

• Yes Remove the paper.

• No Is the operation of the paper sensor plate normal (moves freely when it is touched)?

• No Replace the paper sensor plate.

• Yes Replace the power supply/sensor board.

• No Has the paper reached the paper sensor plate?

• No Is the registration roller rotating?

• No Replace the one-way clutch gear of the hopping roller assembly.

• Yes Is the image drum cartridge being set properly?

• No Set the image drum cartridge properly.

• Yes Check the hopping roller assembly or tray.

• Yes Has the paper reached the outlet sensor plate?

• Yes Is the operation of the outlet sensor plate normal (moves freely when it is touched)?

• No Replace the outlet sensor plate.

• Yes Clean the outlet sensor on the power supply/sensor board or replace the power supply/sensor board.

• No Is the main/drum motor rotating?

• No Is DM connector on the main control board being connected properly?

• No Connect DM connector properly.

• Yes Is the coil resistance (normal resistance: both between Pins l and 2, as well as Pins 3 and 4 are about 2.9Ω) of the main/drum motor correct ?

• No Replace the main/drum motor.

• Yes Replace the main control board.

• Yes Is the transfer roller rotating?

2-2-a

41154001TH Rev.2 90 /

2-2-a

• No Check the gears (transfer roller gear, idle gear and reduction gear).

• Yes Is the fusing unit being installed properly?

• No Install the fusing unit properly.

• Yes Is the image drum cartridge being set properly?

• No Set the image drum cartridge properly.

• Yes Clean the paper sensor on the power supply/sensor board or replace the power supply/ sensor board.

[JAM error]

2-3 Paper exit jam

• Does the paper exit jam error occur when the power is turned on?

• Yes Is the paper on the outlet sensor plate?

• Yes Remove the paper.

• No In the operation of the outlet sensor plate normal (moves freely when it is touched)?

• No Replace the outlet sensor plate.

• Yes Clean the outlet sensor on the power supply/sensor board or replace the power supply/sensor board.

• No Is the face-up stacker pulled out completely from the printer or, pushed into the printer completely?

• No Pull the face-up stacker out of the printer completely or push it into the printer completely.

• Yes Is the eject roller assembly being installed properly?

• No Install the eject roller assembly properly.

• Yes Has the coil spring come off the eject roller assembly?

• Yes Install the coil spring to the eject roller assembly.

• No Replace the eject roller assembly.

41154001TH Rev.2 91 /

3 Paper size error

• Is paper of the specified size being used?

• No Use paper of the specified size.

• Yes Are inlet sensor plates 1 and 2 operating properly (moves freely when they are touched)?

• No Replace the inlet sensor plate or clean the inlet sensor on the power supply/ sensor board.

• Yes Does the outlet sensor plate operate properly (moves freely when it is touched)?

• No Replace the outlet sensor plate or clean the outlet sensor on the power supply/ sensor board.

• Yes Replace the power supply/sensor board.

Exit roller

Inlet

Toner

sensor 2

sensor

Paper feeding direction

Heat roller

Transfer roller

Hopping

roller

Outlet sensor

Paper sensor

Paper end sensor

Inlet sensor 1

Registration roller

41154001TH Rev.2 92 /

4 Fusing unit error Status Message : Thermister Open Error

: Thermister Short Check Error : Fuser Error

• Turn the power off, then back on again.

• Yes Is the thermistor open or shorted? Measure the resistance between thermistor contacts (heater contacts 120V/3Ω or 240V/10Ω, and thermistor contacts 220KΩ at room temperature) (see Figure 6-2 or Section 7.3).

• Yes Replace the fusing unit.

• No Do the thermistor contacts touch the contact assembly properly when the fusing unit is mounted in the printer?

• No Adjust the contacts of the contact assembly.

• Yes Is the heater of the fusing unit turned on (when the heater is turned on, light is emitted)?

• Yes Check the thermistor contacts or replace the main control board or the fusing unit.

• No Is the AC voltage being supplied to the contacts for the heater of the contact assembly?

(see Figure 6-2)

• No Replace the main control board or the power supply/sensor board.

• Yes Check the heat contacts of the fusing unit and the contact assembly for poor contact

(see Figure 6-4 contact G ).

Heater contacts

Themistor contacts

Figure 6-2

41154001TH Rev.2 93 /

5 Synchronous serial I/O error (Status Message : SSIO Error) or I/F timeout

between printer and optional tray (Status Message : Tray2 Timeout Error or Feeder Timeout Error)

• Is an option tray (High Capacity Second Paper Feeder or Power Envelope Feeder) being used?

• Yes Is the cable between the main control board and the optional tray being connected properly?

• No Connect the cable properly.

• Yes Replace the main control board.

• Has the problem been solved?

• No Check the problem by following the High Capacity Second Paper Feeder

maintenance manual of Appendix F.

• Yes End

• No Replace the main control board.

• Has the problem been solved?

• No Replace the power supply/sensor board.

• Yes End

6 Fan error (Status Message : FAN Motor Error)

• Is the fan rotating?

• Yes Replace the main control board.

• No Is FAN connector on the main control board being connected properly?

• No Connect FAN connector properly.

• Yes Replace the fan or main control board.

41154001TH Rev.2 94 /

6.5.3 Image Troubleshooting Procedures for troubleshooting for abnormal image printouts are explained below. Figure 6-3

below shows typical abnormal images.

Problem Flowchart number

Images are light or blurred entirely (Figure 6-3 Dark background density (Figure 6-3 Blank paper is output (Figure 6-3

)

Black vertical belts or stripes (Figure 6-3

)

) Cyclical defect (Figure 6-3 E ) Prints voids Poor fusing (images are blurred or peels off when the printed

characters and images on the paper are touched by hand) White vertical belts or streaks (Figure 6-3

)

1 2 3 4 5 6 7

Light or blurred images entirely

Black vertical belts or stripes

Dark background density

Cyclical defect

Figure 6-3

Blank paper

White vertical belts or streaks

41154001TH Rev.2 95 /

1 Images are light or blurred entirely.

• Is toner low (is the TONER LOW message displayed)?

• Yes Supply toner.

• No Is paper of the specified grade being used?

• No Use paper of the specified grade.

• Yes Is the lens surface of the LED head dirty?

• Yes Clean the lens.

LED head

• No Is the LED head being installed properly (check the HEAD1connector of the main control board

PC connector

and PC connector on the LED head for proper connection)?

LED head cable

• No Install the LED head properly.

• Yes Is the contact plate of the transfer roller in contact with the contact assembly of the power supply/

HEAD1 Main control board

sensor board properly (see Figure 6-5)?

• No Adjust the contact plate of the transfer roller to make a proper contact with the power supply/sensor board and shaft of the transfer roller.

• Yes Are the contact of the developing roller and the contact of the toner supply roller of the image drum cartrige in contact with the contact assembly properly (see Figure 6-4 A and B )?

• No Adjust the contacts of the developing and toner supply roller to make a proper contact with the contact assembly.

• Yes Replace the transfer roller.

• Has the problem been solved?

• Yes End

• No Replace the image drum cartridge.

• Has the problem been solved?

• Yes End

Note:

After replacing the image drum cartridge, reset the drum counter by clicking the "Reset" button in the Status Monitor. (See Printer Handbook).

• No Is the tension between the back-up roller (7.52kg) and the surface of back-up roller normal?

• No Replace the back-up roller or bias spring.

• Yes Replace the main control board or power supply/sensor board.

41154001TH Rev.2 96 /

2 Dark background density

• Has the image drum been exposed to external light?

• Yes Install the image drum in the printer and wait about 30 minutes.

• No Perform the cleaning page function (see Section 5.2.2).

• Has the problem been solved?

• Yes End

• No Is the heat roller of the fusing unit dirty?

• Yes Clean the heat roller.

• No Is the contact of the cleaning roller of the image drum cartridge in contact with the contact assembly properly (see Figure 6-4 C )?

• No Adjust the contact of the cleaning roller to make a proper contact with the contact assembly.

• Yes Replace the image drum cartridge.

• Has the problem been solved?

• Yes End

Note:

• No Replace the main control board or power supply/sensor board.

After replacing the image drum cartridge, reset the drum counter by clicking the "Reset" button in the Status Monitor. (See Printer Handbook).

3 Blank paper is output.

• Is the LED head being connected properly (check the HEAD1 and HEAD2 connectors on the main control board and PC connector on the LED head)?

• No Connect the LED head properly or replace the head cable(s).

• Yes Is the contact of the image drum cartrige in proper contact with the ground contact

properly (see Figure 6-4 C )?

• No Adjust the ground contact (Drum) of the contact assembly.

• Yes Replace the LED head.

• Has the problem been solved?

• Yes End

Note:

• No Replace the main control board or power supply/sensor board.

41154001TH Rev.2 97 /

After replacing the LED head, set the LED head drive time (See 4.2).

4 Black vertical belts or stripes

• Perform the cleaning page function (see Section 5.2.2).

• Has the problem been solved?

• Yes End.

• No Replace the image drum cartridge.

• Has the problem been solved?

• Yes End

• Clean the LED lens array of the LED head.

• Has the problem been solved?

• Yes End.

• No Replace the LED head.

• Has the problem been solved?

• Yes End

• No Replace the main control board or power supply/sensor board.

5 Cyclical defect

Note:

After replacing the image drum cartridge, reset the drum counter by clicking the "Reset" button in the Status Monitor. (See Printer Handbook).

After replacing the LED head, set the LED head drive time (See 4.2).

Frequency Remedy

Image drum Developing roller Toner supply roller Charging roller Cleaning roller Transfer roller Heat roller Back-up roller

Note:

41154001TH Rev.2 98 /

After replacing the image drum cartridge, reset the drum counter by clicking the "Reset" button in the Status Monitor. (See Printer Handbook).

3.71" (94.2mm)

1.86" (47.12mm)

2.96" (75.27mm)

1.21" (30.63mm)

0.93" (23.56mm)

1.95" (49.6mm)

2.44" (62.0mm)

2.73" (69.4mm)

Replace or clean the image drum cartridge. Replace the image drum cartridge. Replace the image drum cartridge. Replace the image drum cartridge. Replace the image drum cartridge. Replace the transfer roller. Replace the fusing unit assy. Replace the back-up roller.

6 Prints voids

• Is the contact plate of the transfer roller in proper contact with the power supply/sensor board (see Figure 6-5)?

• No Adjust the contact plate so that it touches the power supply/sensor board and the

• Yes Replace the transfer roller.

• Has the problem been solved?

• Yes End

• No Is the tension between the back-up roller (7.52kg) and the surface of back-up roller

normal?

• No Replace the back-up roller or bias spring.

• Yes Are the contacts of the toner supply roller, developing roller, image drum and charging

roller in proper contact with the contact assy (see Figure 6-4 A , B , C , D , E )?

• No Adjust the contacts so that they touch the contact assy properly.

• Yes Replace the image drum cartridge.

shaft of the transfer roller properly.

• Has the problem been solved?

• Yes End

Note:

• No Is the LED head being installed properly (check HEAD1 and HEAD 2 connectors on the

main control board and PC Connector on the LED head)?

• No Install the LED head properly.

• Yes Replace the LED head or the head cable(s).

• Has the problem been solved?

• Yes End

Note:

• No Replace the main control board or power supply/sensor board.

After replacing the LED head, set the LED head drive time (See 4.2).

After replacing the image drum cartridge, reset the drum counter by clicking the "Reset" button in the Status Monitor. (See Printer Handbook).

41154001TH Rev.2 99 /

7 Poor fusing (images are blurred or peels off when the printed characters and

images on the paper are touched by hand)

• Is paper of the specified grade being used?

• No Use paper of the specified grade.

• Yes Is the tension between the back-up roller (7.52kg) and the surface of back-up roller

normal?

• No Replace the back-up roller or bias spring.

• Yes Is the contact of the fusing unit assy in proper contact with the contact assy (see Figure

6-4 G )?

• No Adjust the contact of the fusing unit assy to make a proper contact with the contact assembly.

• Yes Replace the fusing unit assy.

• Has the problem been solved?

• Yes End

• No Replace the main control board or power supply/sensor board.

41154001TH Rev.2 100 /

OKI 10e Maintenance Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1. CONFIGURATION

2. OPERATION DESCRIPTION

3. PARTS REPLACEMENT

4. ADJUSTMENT

5. PERIODICAL MAINTENANCE

6. TROUBLESHOOTING PROCEDURES