Oki PAGE 6ex User Manual

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OKIPAGE 6e/6ex LED Page Printer

Maintenance Manual

ODA/OEL/INT

Approval

All specifications are subject to change without notice.

PREFACE

This Maintenance Manual describes the field maintenance methods for OKIPAGE 6e and OKIPAGE 6ex LED Page Printers.

This manual is written for use by service persons. Please note that you should refer to the Printer Handbook for the handling and operating methods of the equipment.

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1. CONFIGURATION..................................................................................... 1 - 1

1.1 System Configuration ........................................................................ 1 - 1

1.2 Printer Configuration.......................................................................... 1 - 2

1.3 Optional Configuration....................................................................... 1 - 3

1.4 Specification ...................................................................................... 1 - 5

1.5 Safety Standards ............................................................................... 1 - 7

1.5.1 Certification Label.................................................................................... 1 - 7

1.5.2 Warning Label ......................................................................................... 1 - 8

1.5.3 Warning/Caution Marking ........................................................................ 1 - 9

2. OPERATION DESCRIPTION .................................................................... 2 - 1

2.1 Control Board..................................................................................... 2 - 4

2.2 PS Board ........................................................................................... 2 - 6

2.3 RAM Board ........................................................................................ 2 - 7

2.4 Power Supply Board.......................................................................... 2 - 8

2.5 Electrophotographic Process............................................................. 2 - 10

2.5.1 Electrophotographic Process Mechanism ............................................... 2 - 10

2.5.2 Electrophotographic Process .................................................................. 2 - 13

2.5.3 Process Operation Descriptions .............................................................. 2 - 16

2.6 Paper Jam Detection ......................................................................... 2 - 27

2.7 Cover Open ....................................................................................... 2 - 30

2.8 Toner Low Detection.......................................................................... 2 - 31

3. PARTS REPLACEMENT........................................................................... 3 - 1

3.1 Precautions for Parts Replacement................................................... 3 - 1

3.2 Parts Layout....................................................................................... 3 - 3

3.3 How to Change Parts......................................................................... 3 - 6

3.3.1 Upper Cover ............................................................................................ 3 - 7

3.3.2 Stacker ....................................................................................................3 - 8

3.3.3 LED Head ................................................................................................ 3 - 9

3.3.4 Eject Roller Assy ..................................................................................... 3 - 10

3.3.5 Pulse Motor (Main) .................................................................................. 3 - 11

3.3.6 Pulse Motor (Registration)....................................................................... 3 - 12

3.3.7 Lower Base Unit ...................................................................................... 3 - 13

3.3.8 Motor Assy .............................................................................................. 3 - 14

3.3.9 Hopping Roller Assy ................................................................................ 3 - 15

3.3.10 Stacker Cover Assy ................................................................................. 3 - 16

3.3.11 Registration Roller ................................................................................... 3 - 17

3.3.12 Transfer Roller......................................................................................... 3 - 18

3.3.13 Fusing Unit Assy ..................................................................................... 3 - 19

3.3.14 Back-up Roller ......................................................................................... 3 - 20

3.3.15 Sensor Plate (Inlet).................................................................................. 3 - 21

3.3.16 Toner Sensor (Adhesion) ........................................................................ 3 - 22

3.3.17 Sensor Plate (Outlet) ............................................................................... 3 - 23

3.3.18 Manual Feed Guide Assy ........................................................................ 3 - 24

3.3.19 Sensor Plate (Paper Supply) ................................................................... 3 - 25

3.3.20 Main Control PCB.................................................................................... 3 - 26

3.3.21 Power Supply Board and Contact Assy .................................................. 3 - 27

3.3.22 Transformer ............................................................................................. 3 - 28

3.3.23 Cassette Guide L ..................................................................................... 3 - 29

3.3.24 Cassette Guide R .................................................................................... 3 - 30

4. ADJUSTMENT........................................................................................... 4 - 1

4.1 Adjustment......................................................................................... 4 - 1

4.1.1 Maintenance Functions ........................................................................... 4 - 1

4.2 Adjustment......................................................................................... 4 - 10

4.2.1 Maintenance Modes and Functions ........................................................ 4 - 10

4.3 Adjustment When Replacing a Part................................................... 4 - 12

4.3.1 Adjustment at the Time of Part Replacement

(OKIPAGE6e 300dpi LED head) ............................................................. 4 - 12

4.3.2 Adjustment When Replacing a Part (OKIPAGE6ex 600dpi LED head) .. 4 - 14

4.3.3 Uploading / Downloading EEPROM data ................................................ 4 - 17

5. PERIODICAL MAINTENANCE ................................................................. 5 - 1

5.1 Periodical Replacement Parts ........................................................... 5 - 1

5.2 Cleaning............................................................................................. 5 - 1

5.2.1 Cleaning of LED Lens Array .................................................................... 5 - 1

6. TROUBLESHOOTING PROCEDURES .................................................... 6 - 1

6.1 Troubleshooting Tips ......................................................................... 6 - 1

6.2 Check Points before Correcting Image Problems.............................. 6 - 1

6.3 Tips for Correcting Image Problems.................................................. 6 - 1

6.4 Preparation for Troubleshooting ........................................................ 6 - 2

6.5 Troubleshooting Flow ........................................................................ 6 - 3

6.5.1 Status Message/Trouble List ................................................................... 6 - 3

6.5.2 Status Message Troubleshooting ............................................................ 6 - 24

6.5.3 Image Troubleshooting ............................................................................ 6 - 36

7. WIRING DIAGRAM.................................................................................... 7 - 1

7.1 Interconnect Signal Diagram ............................................................. 7 - 1

7.2 PCB Layout and Connector Signal List ............................................. 7 - 3

7.3 Resistance Check.............................................................................. 7 - 15

7.4 Short Plug Setting.............................................................................. 7 - 17

8. PARTS LIST .............................................................................................. 8 - 1

Appendix A Centronics Parallel Interface ................................................. A - 1

B LocalTalk (RS422) Serial Interface........................................ B - 1

C Diagnostics Test..................................................................... C - 1

D Maintenance Utility Overview................................................ D - 1

E Multi-Purpose Feeder Maintenance...................................... E - 1

F High Capacity Second Paper Feeder Maintenance............. F - 1

1. CONFIGURATION

1.1 System Configuration

OKIPAGE 6e and OKIPAGE 6ex consist 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

(OKIPAGE 6ex Only)

Paper

Cassette

Engine Unit

* Legal/Universal

Paper Tray

* Hight Capacity

Second Paper Feeder

* Multi-Purpose

Feeder

Paper Feed Mechanism

(First Tray Unit)

Electrophotographic

Processing Unit

Main Control PCB

Face

Down

Stacker

Power Supply

and Sensor PCB

*OKIPAGE 6ex

*OKIPAGE 6e/6ex

Figure 1-1

: PS Board with RAM

: RAM Board

1 - 1

* : Optional

1.2 Printer Configuration

The printer unit consists of the following hardware components:

• Electrophotographic Processor

• Paper Feeder

• Main Control PCB

• Operator Panel (OKIPAGE 6ex Only)

• Power Supply Unit

• PS Board (OKIPAGE 6ex Only) The printer unit configuration is shown in Figure 1-2.

PS Board

Operator panel assy

Fusing unit

Upper cover

Toner cartridge (consumables)

Stacker cover assy

Image drum unit

(consumable)

Power supply board

Main Control PCB

• L5C or L5D: OKIPAGE6e

• L6A : OKIPAGE 6ex

Figure 1-2

1 - 2

1.3 Optional Configuration

The options shown below are available for use with OKIPAGE 6e and OKIPAGE 6ex. These are available separately from the printer unit.

(1) 1MB Memory Expansion Board (OKIPAGE 6e/6ex)

(2) SIMM Memory

OKIPAGE 6e :1/2/4/8/16 Mbyte OKIPAGE 6ex :1/2/4/8/16/32 Mbyte

(3) Legal/Universal Paper Cassette/

Legal/Universal cassette

Cassette cover

1 - 3

(4) High Capacity Second Paper Feeder

(5) Multi-Purpose Feeder

1 - 4

1.4 Specification

(1) Type Desktop (2) External dimensions Height 6.3” (160 mm)

(excludes protruding Width 12.6” (320 mm)

portion) Depth 14.17” (360 mm) (3) Weight 8 kg (4) Developing method Dry electrophotography

Exposing method LED stationary head (5) Paper used <Type>

• Standard paper – Xerox 4200 (20 lbs)

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

<Size>

• Standard sizes – Letter (ODA) – Legal (option) – Executive – Envelope – A4 – A5 – B5 – A6

• Applicable sizes – Width: 3.94” to 8.5” (100 to 216 mm) – Length: 5.83” to 14” (148 to 355.6 mm)

– Automatic feed: 16 to 24 lbs (60 to 90 g/m2) – Manual feed: Label, OHP paper (transparency)

Envelope

(6) Printing speed First print: 17 sec.

Continuous print: 6 sheets/min. for letter size paper Warm-up time: 60 sec. [at room temperature 77˚F

(25˚C) and rated voltage (120 VAC)] (7) Paper feeding method Automatic feed or manual feed (8) Paper delivery method Face down/face up (9) Resolution 300 x 300 dots/inch (OKIPAGE 6e)

600 x 600 dots/inch (OKIPAGE 6ex) 600 x 1200 dots/inch (OKIPAGE 6ex)

1 - 5

(10) Power input 120 VAC +5.5%, –15%

230 VAC +15 %, –15%

(11) Power consumption Peak: Approx. 420W

Typical operation: Approx. 160W Idle: Approx. 55W Power save mode: Approx. 15W

(12) Temperature and humidity During operation: 50 to 90°F (10 to 32°C)

In storage: 14 to 110°F (–10 to 43°C)

(13) Noise During operation: 48 dB (A) or less

Standby: 38 dB (A) or less

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

Image drum cartridge 20,000 (at continuous printing)

15,000 (3 pages/job)

10,000 (1 page/job)

1 - 6

1.5 Safety Standards

1.5.1 Certification Label The safety certification label is affixed to the printer at the location described below.

OKIPAGE 6e OKIPAGE 6ex

OKIPAGE 6e

120V

OKIPAGE 6ex

230V

1 - 7

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.

1 - 8

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

CAUTION

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.

1 - 9

2. OPERATION DESCRIPTION

OKIPAGE 6e, OKIPAGE 6ex consists of a Main Control PCB, a power supply/sensor board, a PostScript board (OKIPAGE 6ex), an operator panel and an electrophotographic process mechanism.

The soft operator panel is used for operation and status display of OKIPAGE 6e and OKIPAGE 6ex.

The operator panel is used for operation and status display of OKIPAGE 6ex. The OKIPAGE 6e and OKIPAGE 6ex receive data via the host I/F, these then decode, edit and

store the data in memory. Bit map image data is successively transferred to the LED head in one dot line units.

OKIPAGE 6e block diagram is shown in Figure 2-1. OKIPAGE 6ex block diagram is shown in Figure 2-2.

2 - 1

1MB Memory Board

(Option)

L5C- or L5D

EEPROM

Centronics parallel I/F

Reset

circuit

Program & Font

ROM

4MB Mask ROM

7407

16 bits

DATA

BUS

1 Chip CPU

+8V -8V 0V +5V

+30V

For optional

RAM board

L5C

256k x 16 DRAM x 2

CH TR DB

HEAT ON

L5D

Resident RAM

1M x 16 DRAM(2M Bytes)

Resident RAM

(1M Bytes)

Drum motor &

Registration motor

drive circuit

FAN Driver

FAN ALM

High Capacity Second Paper

Feeder (Option)

FAN

LED Head

Drum Motor

Registration Motor

Multi-Purpose

Feeder (Option)

Power Supply Board

Inlet sensor 1

Inlet sensor 2

Paper sensor

Outlet sensor

Paper out sensor

Toner low sensor

Low voltage

generation circuit

transformer

Figure 2-1 OKIPAGE 6e Block Diagram

Cover

open

switch

High voltage

Heater drive

circuit

Filter circuit

generation

circuit

LSI +5V

Thermistor

Charge roller

Transfer roller

Developing

roller

Toner supply

roller

Cleaning

roller

Heater

AC IN

2 - 2

1MB Memory Board

LocalTalk I/F (RS422 I/F)

PS Board with RAM

L6A-

EEPROM

Centronics parallel I/F

Reset

circuit

Program & Font

ROM

4MB Mask ROM

7407

16 bit

32 bit

DATA

BUS

1 Chip CPU

+8V -8V 0V +5V +30V

For optional

RAM board

16 bit

Resident RAM

1M x 16 DRAM

CH TR DB

HEAT ON

(2MB)

Drum motor &

Registration motor

drive circuit

FAN Driver

FAN ALM

High Capacity Second Paper

Feeder (Option)

FAN

LED Head

Drum Motor

Registration Motor

Multi-Purpose

Feeder (Option)

Power Supply Board

Inlet sensor 1

Inlet sensor 2

Paper sensor

Outlet sensor

Paper out sensor

Toner low sensor

Low voltage

generation circuit

transformer

Figure 2-2 OKIPAGE 6ex Block Diagram

Cover

open

switch

High voltage

Heater drive

circuit

Filter circuit

generation

circuit

LSI +5V

Thermistor

Charge roller

Transfer roller

Developping

roller

Toner supply

roller

Cleaning

roller

Heater

AC IN

2 - 3

2.1 Control Board

The control board consists of a single chip CPU, Program & Font ROM's, one or 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, 16-bit or 32-bit external bus, 25.54 MHz clock with input frequency from a 12.27 MHz clock) which incorporates the RISC CPU and its peripheral devices, and has the following functions:

Built-in device Function

Chip select controller Control of ROM, DRAM and I/O device Bus controller DRAM controller

DMA controller Transfer of image data from DRAM to video output port

Parallel interface controller Control of Centronics parallel interface

Video output port Control of LED head LED STB output port

Timer Generation of various control timing

Monitoring of paper running and paper size

Serial I/O port Control of operator panel, EEPROM, and options

I/O port Input and output of sensor and motor signals

(2) Program & Font ROM

OKIPAGE 6e/6ex The Program & Font ROM store the PCL5e emulation program and various types of fonts.

Mask ROM is used for a Program & Font ROM. The mounting location of this Program & Font ROM varies depending on the type of ROM (for the mounting location see 7.2).

PS Board The Program & Font ROM store the PostScript program and various types of fonts. Mask

ROM is used for a Program & Font ROM (for the mounting location see 7.3).

2 - 4

(3) DRAM

OKIPAGE 6e/6ex The DRAM is a resident memory (OKIPAGE 6e: 1MB(L5C) or 2MB(L5D)/OKIPAGE 6ex:

2MB) used as a buffer, and it stores edited data, image data, DLL data and macro data. OKIPAGE 6ex with PS Board The DRAM is a resident memory (2MB on the OKIPAGE 6ex main board plus 0.5MB on the

PS board) used as a buffer, and it stores edited data, image data, DLL data and macro data. In the Post Script emulation, it is used as VM and font cache also.

(4) EEPROM

1,024 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 the host system via parallel interface which conforms to the Centronics specification. IEEE 1284 Bi-directional parallel is supported.

2 - 5

2.2 PS Board (OKIPAGE 6ex option)

The PS board consists of two Program & Font ROM's, DRAM's, an EEPROM, and a host interface circuit.

(1) Program & Font ROM's

The Program & Font ROMs store the PostScript Level II program and its fonts. Mask ROM is used for the Program & Font ROMs.

(2) DRAM

0.5MB of DRAM's reside on the PS board.

(3) EEPROM

4.096 bit-Electrically Erasable PROM (EEPROM) is mounted on the PS board for storing the PostScript's menu settings.

(4) Local Talk I/F

Apple Talk protocol data is received from the host system via LocalTalk interface. The block diagram is shown in Figure 2-3.

(5) SIMM Socket

LocalTalk I/F (RS422 I/F)

One SIMM Socket is mounted on the PS board.

Program & Font

ROM

4MB Mask ROM

SCC

85C30

Figure 2-3 PS Board Block Diagram

SIMM

Socket

Resident RAM

(0.5MB)

EEPROM

(4K)

2 - 6

2.3 RAM Board (OKIPAGE 6e/6ex option)

The RAM board consists of DRAM's and a SIMM socket. (1) DRAM

1MB of DRAM's reside on the RAM board.

(2) SIMM Socket

One SIMM socket is mounted on the RAM board.

SIMM Socket

Figure 2-4 RAM Board Block Diagram

Resident RAM

(1MB)

2 - 7

2.4 Power Supply Board

The power supply 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 Logic circuit supply voltage

+30 V Motor and fan drive voltage and source voltage for high-voltage supply

+8 V Analog supply voltage

–8 V PS board and analog circuit supply voltage

(2) High Voltage Power Supply Circuit

This circuit generates following voltages required for electrophotographic process from +5 V, according to the control sequence from the 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 -1.35 KV Voltage applied to charging roller

DB -300 V/+300 V Voltage applied to developing roller

SB -450 V/ 0 V Voltage applied to toner supply roller

TR +500 V to +4 KV/-750 V Voltage applied to transfer roller Variable

CB +400 V Voltage applied to clearing roller

(3) Photosensor

The photosensor mounted on this power supply board monitors the paper running state during printing.

2 - 8

The sensor layout diagram is shown in Figure 2-3.

Transfer roller

Paper sensor

Toner sensor

Inlet sensor 2

Paper end sensor

Exit roller

Outlet sensor

Heat roller

Inlet sensor 1

Registration roller

Hopping

roller

Paper running direction

Sensor

Inlet sensor 1

Inlet sensor 2

Paper sensor

Outlet sensor

Paper end sensor

Toner low sensor

Figure 2-5

Function

Detects the leading edge of the paper and gives the supervision timing for switching from hopping operation to feeding operation. Monitors paper feeding situation and paper size based on the paper arrival time and running time.

Detects the form width.

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.

Detects the end of the paper.

Detects the lack of toner.

Sensing state

ON: Paper exists. OFF: No paper exists.

ON: A4 or larger OFF: Smaller than A4

ON: Paper exists. OFF: No paper exists.

- - - - -

2 - 9

2.5 Electrophotographic Process

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

by electrophotographic process. The layout of the electrophotographic process mechanism is shown in Figure 2-6.

2 - 10

Eject roller assy

Heat roller

LED head

Charge roller

Developing roller

Image drum unit

Toner cartridge

2 - 11

Figure 2-6

Paper cassette

Outlet sensor lever

Back-up roller

Cleaning roller

Transfer roller

Registration roller

Inlet sensor lever

Paper sensor lever

Hopping roller

(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, that is two-phase excited by the signal from the Main Control PCB. It drives the hopping and registration rollers via two oneway clutches according to the direction of rotation.

(3) Drum Motor

The drum motor is a pulse motor of 48 steps/rotation that is two-phase excited by the signal from the Main Control PCB and is the main motor of this mechanism.

(4) LED Head

Image data for each dot line from the control board is received by the shift register and latch register. The 2496 LED's (OKIPAGE 6e)/4992 LED's (OKIPAGE 6ex) 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 board is applied to the heater controlled by the

HEATON signal from the control board. This AC voltage heats the heater. The Main Control PCB monitors the heat roller temperature via the thermistor, and regulates the heater roller to a predetermined temperature (165°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.

2 - 12

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

is shown in Figure 2-7. 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 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 2-8.

2 - 13

Paper

eject roller

2 - 14

Figure 2-7

Paper

eject

roller

Paper

eject

(Face up)

Outlet sensor

Heater roller

Paper

path

selector

Fusing

Paper

eject

(Face down)

Power

supply

Charger

roller

Power supply

Cleaning

roller

Back-up roller

Charging

Cleaning

Power

supply

Image data

LED head

Exposure

Transfer

roller

Developing

Paper sensor

Doctor

blade

Developing

roller

Paper

registration

Registration roller

(Bias voltage)

Inlet sensor

Power supply

Toner

supply

roller

Paper

supply

Hopping

roller

Toner

cartridge

Paper

tray

FusingPaper eject

Cleaning

Transfer

Image production developing

Paper feed

Paper hopping

Path of paper feeding

Direction of rotation of the image drum

2 - 15

PRINT-N

PRDY-N

DM-ON-N

Figure 2-8

RM-ON

INSNS

OUTSNS-N

Outlet Sensor OFF

Feed stopInlet Sensor OFFFeed start

2.5.3 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

Registration gear

Motor gear

Idle gear

Registration roller

Hopping roller

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.

2 - 16

(a) Hopping

1 For hopping, the registration motor turns in direction "a" (CW 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

2 - 17

(b) Feeding

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

(CCW 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, synchronization to the print data.

Image drum

Paper

Transfer roller

Hopping roller

Registration roller

2 - 18

(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

Image drum

Charge roller

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

2 - 19

(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.

Power supply

Charge roller

Image drum

LED head

Paper

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.

2 - 20

Image drum

CTL

CGL

Base

20 µm

30 mm

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

2 - 21

(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

Toner supply roller

Developing roller

Image drum

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

Exposed

part

Exposed

part

–100V

Toner

Image drum

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

2 - 22

Note:

The bias voltage required during the developing process is supplied to the toner supply roller and the developing roller, as shown in the diagram below. –450 VDC is supplied to the toner supply roller, –300 VDC to the developing roller.

Connected and bias supplied when the cover is closed

Image drum

Toner supply roller

Developing roller

Base

2 - 23

(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

2 - 24

(6) Fusing

When the image 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 heats the heat roller.

A thermistor which is in contact with the heater roller regulates the temperature of the heater roller at a predetermined level (about 165°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 3.8 kg applied by the pressure spring on each side.

Heater roller

Separation claw

Heater

Thermistor

Back-up roller

Pressure spring

2 - 25

(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

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.

• User initiated.

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

2 - 26

2.6 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 • 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

Paper feed jam • The paper is in contact with at the paper sensor when the power is turned on.

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

• The trailing edge of the paper does not pass over the paper sensor within a

• The leading edge of paper does not reach the outlet sensor within a predeter-

does not reach the inlet sensor.

predetermined distance since the paper has reached the inlet sensor.

predetermined distance after the same has passed over the inlet sensor.

mined distance after the paper has reached the paper sensor.

Paper exit jam • 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 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.

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

by the inlet sensor 1 within predetermined 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.

2 - 27

Drum motor

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

2 - 28

Paper Feed Check List

Type of error

Paper feed error

Paper feed jam

Paper size error

Paper exit jam

Paper feed jam

Note:

Hyphen "-" in the table represent "no check is done."

Monitor

Hopping start

Inlet sensor on

Write sensor on

Outlet sensor on

Inlet sensor on

Inlet sensor off

Outlet sensor on

Outlet sensor off

Inlet sensor off

Write sensor off

Standard value

72.0

20.0

140.5

Depends on the paper length

22.2

Error

Plus Minus

36.0 _

20.0 _

25.0 _

45.0 45.0

22.0 _

Unit : mm

Paper Length List

Check range

Type Paper length

Min. Max.

A4 297.0 252.0 342.0

A5 210.0 165.0 255.0

B5 257.0 212.0 302.0

LETTER 279.4 234.4 324.4

LEGAL 13 330.2 285.2 375.2

LEGAL 14 355.6 310.6 400.6

EXEC 266.7 221.7 311.7

A6 148.0 103.0 193.0

Monarch 190.5 145.5 235.5

COM-9 225.4 180.4 270.4

COM-10 241.3 196.3 286.3

DL 220.0 175.0 265.0

C5 229.0 184.0 274.0

Free 110.0 ~ 355.6 65.0 400.6

Unit : mm

2 - 29

2.7 Cover Open

When the stacker cover is opened, the cover open microswitch on the power/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 control board to notify that the microswitch is off, and the control board carries out the cover open process.

2 - 30

2.8 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 protrusion in the stirring gear.

Magnet

Stirring Bar

Stirring Gear

Protrusion

• Operation Toner Low is detected by monitoring the time interval of the encounter of the magnet set on

the sensor lever and the magnet on the stirring bar.

Stirring Gear Section

Operation during Toner Full state

• The stirring bar is rotated due to the mechani-

Stirring Bar

cal 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 end is being dipped in the toner.

Toner Sensor

Sensor Plate

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 lever becomes longer. By monitoring this time interval, Toner Low can be detected.

2 - 31

Stirring Bar

Sensor Plate

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.

4.875 sec.

240 ms < t1 < 1.5 sec

t1 > 1.5 sec.

t1 < 240 ms

• When there is no change with the toner sensor for 2 cycles (4.875 sec. x 2) or more, then the Toner Sensor Alarm is activated.

• The toner sensor is not monitored while the drum motor is in halt.

2 - 32

3. PARTS REPLACEMENT

The 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 steps of disassembly procedure.

3.1 Precautions for Parts Replacement

(1) Before starting the parts replacement, remove the AC power cord and interface cable.

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

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

(b) Reconnect the printer in the following sequence.

i) Connect the AC power 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.

(2) Do not try to disassemble as long as the printer is operating normally. (3) Do not remove parts which do not need to be touched; try to keep the disassembly to a

minimum.

(4) Use specified service tools. (5) When disassembling, follow the procedure in sequence laid out in this manual. 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, ROM's and RAM's, or circuit boards, do not

wear gloves that are likely to generate static electricity.

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

3 - 1

[Service Tools] The tools required for field replacement of printed circuit boards and units are listed in Table 3-1.

Table 3-1 Service Tools

No.

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

Q' ty Place of use RemarksService Tools

2~2.5 mm screws

3~5 mm screws

Cleans LED head

Maintenance Utility

(Parts Number: 4YA4046-1722G1)

Adjustment of a

printer, etc.

OKIPAGE 6e OKIPAGE 6ex

3 - 2

3.2 Parts Layout

This section describes the layout of main parts of the equipment.

[Lower base unit]

Stacker cover assy

Pulse motor (main)

Eject roller assy

Back-up roller

Lower base

View A

Stacker cover assy

LED head

Diselectrification bar

Transfer roller

Registration roller

Hopping roller

shaft assy

Pulse motor (registration)

Fusing unit

Toner cartridge

(consumable)

Manual feed

guide assy

Image drum unit

(consumable)

View A

Figure 3-1

3 - 3

[Upper cover unit]

Stacker clamp

Stacker

Upper cover

Figure 3-2

3 - 4

[Base unit]

DC fan assy

Transformer

RAM board

• LQME-PCB (OKIPAGE 6e/OKIPAGE6ex)

Power supply

Main Control PCB

• L5C or L5D: OKIPAGE 6e

• L6A : OKIPAGE 6ex

Contact assy

Paper cassette

Figure 3-3

3 - 5

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

(3.3.1)

Stacker (3.3.2)

LED head (3.3.3)

Eject roller assy (3.3.4)

Pulse motor (Hopping) (3.3.5)

Pulse motor (Resist) (3.3.6)

Lower base unit

(3.3.7)

Motor assy (3.3.8)

Hopping roller assy (3.3.9)

Stacker cover assy (3.3.10)

Resist roller (3.3.11)

Transfer roller (3.3.12)

Fusing unit assy (3.3.13)

Back-up roller (3.3.14)

Sensor plate (inlet) (3.3.15)

Toner sensor (3.3.16)

Sensor plate (outlet) (3.3.17)

3 - 6

Manual feed guide assy (3.3.18)

Sensor plate (Paper supply) (3.3.19)

Main control PCB (3.3.20)

Power supply board and contact assy (3.3.21)

Transformer (3.3.22)

Cassette guide L (3.3.23)

Cassette guide R (3.3.24)

3.3.1 Upper Cover (1) With the power switch turned off, unplug the AC power cord from the outlet. (2) Disconnect the interface cable 1. (3) Remove the option board D if it is mounted. (4) Lift the left side of the operator panel assy (or logo frame) 4 and remove it. (5) Disconnect the flexible cable 5 from the connector (CN1) 6 of the operator panel PCB 6,

and put the cable inside the cover. (OKIPAGE 6ex only) (6) Open the stacker cover assy 9 by pressing the knobs 8 on the left and right sides. (7) Remove the image drum unit 0. (8) Remove two screws A, and open the manual feed guide assy B. Lift the front of the upper

cover C up and release the claws at two locations on the back side. Align the stacker cover

9 against the diagonal line of the square holes of the upper cover and lift up the upper cover

C slightly, then remove it.

Note:

When removing or installing the upper cover, be careful not to damage the cable 5.

3 - 7

3.3.2 Stacker (1) Remove the upper cover. (See 3.3.1) (2) Remove two stacker clamps 1 and the stacker 2 by bending the upper cover.

3 - 8

3.3.3 LED Head (1) Open the stacker cover. (2) Remove the flexible cable (LED) 1 from the PC connector 2 of the LED head 3. (3) Remove the LED head by prying the left side free from the retaining clip.

Note:

Be careful to not lose the contact (LED) 4.

Note:

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

• After mounting the new LED head, set drive time of the LED head according to the marking on the LED head (see 4.3.1 or 4.3.2).

• For the installation of the flexible cable (LED) 1, install the PC connector 2 to the flexible cable (LED) 1 first, then connect the LED head 3 to the PC connector.

• When installing a new LED head, be careful not to lose the contact (LED) 4.

OKIPAGE 6e

SLA part

OKIPAGE 6ex

3 - 9

3.3.4 Eject Roller Assy (1) Remove the upper cover (see 3.3.1). (2) Press the clamp on the left side of the eject roller assy 1 in the direction of the arrow. Detach

the eject roller assy from the lower base unit 2, and remove it.

Note:

When installing the eject roller, verify the proper engagement with the main unit.

3 - 10

3.3.5 Pulse Motor (Main) (1) Remove the upper cover (see 3.3.1). (2) Remove the connector 3 from (CN2) 2 of the Main Control PCB 1. (3) Remove two screws 4 and remove the pulse motor (main) 6 from the motor bracket 5.

CN2

OKIPAGE 6ex OKIPAGE 6e

CN2

View A

3 - 11

3.3.6 Pulse Motor (Registration) (1) Remove the upper cover (see 3.3.1). (2) Remove the connector 3 from (CN3) 2 of the Main Control PCB 1. (3) Remove two screws 4 and remove the pulse motor (registration) 6 from the motor bracket

OKIPAGE 6e

CN3

OKIPAGE 6ex

CN3

View A

3 - 12

3.3.7 Lower Base Unit (1) Remove the upper cover (see 3.3.1). (2) Remove the connecting cables 4 and 5 of the pulse motor from the connectors 2 and 3

of the Main Control PCB 1.

(3) Remove the connector 6 of the LED head from the Main Control PCB 1.

(OKIPAGE 6e: 1 connector, OKIPAGE 6ex: 2 connectors)

(4) Remove seven screws 7, then remove the lower base unit 8.

3 - 13

3.3.8 Motor Assy (1) Remove the upper cover (see 3.3.1). (2) Remove the lower base unit (see 3.3.7). (3) Stand the lower base unit on its side as shown, and unlock two clamp levers, then remove

the motor assy 1.

Idle gear

Reduction gear

Clamp lever

3 - 14

3.3.9 Hopping Roller Assy (1) Remove the upper cover (see 3.3.1). (2) Remove the lower base unit (see 3.3.7). (3) Remove the motor assy (see 3.3.8). (4) With the lower base unit 1 standing on its side, remove the one-way clutch gear 2 and the

bearing (A) 3, then remove the hopping roller assy 4 and the bearing (B) 5.

3 - 15

3.3.10 Stacker Cover Assy (1) Remove the upper cover (see 3.3.1). (2) Remove the motor assy (see 3.3.8). (3) Remove the reset lever R 1. (4) Detach the reset spring 2 from the lower base unit 3, turn the reset level L 4 in the direction

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

(5) Release two pins of the lower base unit 3, then remove the stacker cover assy 5.

3 - 16

3.3.11 Registration Roller (1) Remove the upper cover (see 3.3.1). (2) Remove the lower base unit (see 3.3.7). (3) Remove the motor assy (see 3.3.8). (4) With the lower base unit standing on its side (view A), remove the one-way clutch gear 1. (5) Press the registration roller 2 to the right side (in the direction of the arrow as shown) and

lift up the left side. Remove the registration roller 2 and the bearing (registration) 3.

View A

3 - 17

3.3.12 Transfer Roller (1) With the power switch turned off, unplug the AC power cord from the outlet. (2) Open the stacker cover. (3) Release TR gear 1 by unlocking the latch 4 of the main unit (never apply an excessive force

when unlocking the latch).

(4) Lift the right side of the transfer roller 2, and shift it to the right side, then pull it out from the

main unit (at this time, the bearings 3 of the left and right sides of the transfer roller 2 will release themselves).

latch

3 - 18

3.3.13 Fusing Unit Assy (1) Remove the upper cover (see 3.3.1). (2) Remove the lower base unit (see 3.3.7). (3) Remove the stacker cover assy (see 3.3.10). (4) Remove four screws 1 and remove the fusing unit 2.

Caution:

Note:

Fusing unit assy may be hot. Use care when handling. When installing or removing the fusing unit assy, tighten or loosen the screws while

holding the fusing unit down with your hand.

3 - 19

3.3.14 Back-up Roller (1) Remove the fusing unit assy (see 3.3.13). (2) Lift the left side of the back-up roller 1, and pull it out to the left side (at this time, two bushings

2, the bias springs 3 and washers 4 and 5 will release themselves).

Note:

Do not bend or lose springs.

3 - 20

3.3.15 Sensor Plate (Inlet) (1) Remove the upper cover (see 3.3.1). (2) Remove the lower base unit (see 3.3.7). (3) Press the clamps of three sensor plates (inlet) 1, and remove the sensor plates by pressing

them upward from the bottom side.

Inlet sensor 2

Paper sensor

Inlet sensor 1

Clamp

3 - 21

3.3.16 Toner Sensor (Adhesion) (1) Remove the upper cover (see 3.3.1). (2) Remove the lower base unit (see 3.3.7). (3) Press the clamp of the toner sensor 1, and remove the sensor by pushing it up from the

bottom.

Clamp

3 - 22

3.3.17 Sensor Plate (Outlet) (1) Remove the upper cover (see 3.3.1). (2) Remove the eject roller assy (see 3.3.4). (3) Remove the lower base unit (see 3.3.7). (4) Remove the fusing unit assy (see 3.3.13). (5) Press the clamp of the sensor plates (outlet) 1, and remove the sensor plate by pushing it

up from the bottom.

Clamp

3 - 23

3.3.18 Manual Feed Guide Assy (1) Remove the upper cover (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:

At the time of mounting, verify the proper the engagements as shown in the diagram.

Put into the post.

Put into the groove.

3 - 24

3.3.19 Sensor Plate (Paper Supply) (1) Remove the upper cover (see 3.3.1). (2) Remove the lower base unit (see 3.3.7). (3) Press the clamp of the sensor plate (paper supply) 1, and remove it from the base plate 2.

View A

3 - 25

3.3.20 Main Control PCB

Note:

When replacing the Main Control PCB, the contents of the EEPROM shall be copied to the new PCB. This process requires a maintenance utility. (See 4.3.1 4 and 4.3.2 4 for details.)

• The Main Control PCB is different for each model.

OKIPAGE 6e : L5C or L5D

OKIPAGE 6ex : L6A (1) Remove the upper cover (see 3.3.1). (2) Remove the lower base unit (see 3.3.8). (3) Remove two screws 1. (4) Move the Main Control PCB 2 in the direction of arrow A to disconnect it from the power

supply board 3.

(5) Remove the Main Control PCB 2 together with the PCB guide plate 4 (disconnect the fan

motor connector 5 from the Main Control PCB).

(6) Remove three screws 6 and remove the PCB guide plate 4 from the Main Control PCB 2.

Do not bend or lose ground plate 9.

CN1

CN3

CN7

3 - 26

3.3.21 Power Supply Board and Contact Assy (1) Remove the upper cover (see 3.3.1). (2) Remove the lower base unit (see 3.3.7). (3) Remove the Main Control PCB (see 3.3.20). (4) Remove the AC inlet 1 from the inlet holder 2, and remove the connector 3 of the

transformer. (5) Remove the screws 4, and remove the ground cable 5. (6) Remove three screws 6, and remove the power supply board 7 and contact assy 8 at the

same time. (7) Unlock two claws 9, and remove the contact assy 8 from the power supply board 7.

Note:

When mounting the lower base unit, be careful about the paper end sensor. Do not apply excessive force to the power switch during reassembly.

View A

3 - 27

3.3.22 Transformer (1) Remove the upper cover (see 3.3.1). (2) Remove the lower base unit (see 3.3.7). (3) Remove the connectors (CN1 and CN2). (4) Remove the inlet 3 from the inlet holder 2. (5) Remove two screws 1, and remove the inlet holder 2 and the transformer 4.

3 - 28

3.3.23 Cassette Guide L (1) Remove the paper cassette. (2) Remove the upper cover (see 3.3.1). (3) Remove the lower base unit (see 3.3.7). (4) Remove the Main Control PCB (see 3.3.20). (5) Remove the power supply board (see 3.3.21). (6) Remove the screw 1, and remove the cassette guide L 2 by shifting it in the direction of the

arrow.

(7) Detach the eject spring 3, and remove the support spring 4 from the cassette guide L 2.

3 - 29

3.3.24 Cassette Guide R (1) Remove the paper cassette. (2) Remove the upper cover (see 3.3.1). (3) Remove the lower base unit (see 3.3.7). (4) Remove the Main Control PCB (see 3.3.20). (5) Remove the screw 1, and remove the cassette guide R 2 by shifting it in the direction of

the arrow.

(6) Pull the eject spring 3 out of the cassette guide R 2, then remove the support spring 4.

3 - 30

4. ADJUSTMENT

4.1 Adjustment (OKIPAGE 6e)

This chapter describes the adjustment necessary when replacing a part. The adjustment is made by changing the parameter value set in EEPROM on the Main Control PCB by means of a printer driver or by a maintenance utility program.

The maintenance utility is designed to be used only by field engineer and it should not be released to the end-users.

4.1.1 Maintenance Functions 1 Printer driver

Printer driver has following functions

• Drum counter reset

• Printer menu default

• Charge roller cleaning

Figure 4-1

(a) Drum counter reset

For initializing engine counter when user has replaced an Image drum unit. The counter is reset by clicking "Drum Count Reset" button.

(b) Printer menu default

For resetting the printer menu to the default value. The menu is automatically reset by clicking "Menu Reset" button.

For cleaning a charge roller of the Image drum unit. It is used when print quality is deteriorated. For details, refer to the user's manual.

4 - 1

2 Maintenance utility

Maintenance utility has following functions. (1) Engine Menu

For setting the engine menu.

(2) Engine Counter Reset

For resetting the engine counter.

(3) Status Monitor

For real time display of the printer status.

(4) Test print

For local print or test print.

(5) Reload

For reading out the printer setting information.

(6) Option

Other functions.

Fig. 4-2 shows the Main Menu Dialog.

Figure 4-2

4 - 2

2-1 Engine Menu

The following functions can be set in the Engine Menu. (1) Print Position

For adjusting print start position.

(2) LED Head Marking No.

For adjusting LED Head marking duration.

(3) LED Head Width

For stipulating number of LED dots.

(4) Optical head

The mounting head type is set.

(5) Head type

The adjustment method for the adjustment head for 600 DPI is set.

(6) Page PRT

Valid or invalid of page count print of menu print is set.

(7) Wait table

The standby temperature 150°C or 135°C is set.

(8) Setting

For adjusting transfer current value.

(9) Enter

For entering the value newly set by the menu.

(10)Cancel

For canceling the value not yet entered.

4 - 3

2-2 Engine Counter

The following functions can be set in the Engine Counter. Each item is reset by clicking of the "Reset" button.

(1) Drum Count

The number of drum revolution of the EP drum unit, counted at the engine block.

(2) Total Drum Count

The total number of drum revolution of the printer, counted at the engine block.

(3) Page Count

The total number of printed pages counted at the engine block.

(4) Reset All

Resetting all counters by clicking of the button.

2-3 Status Monitor

The Status Monitor checks printer status for real time display.

2-4 Test Print Button

The Test Print Button shows the Test Print Dialog to execute local print or test file print. (1) Print Menu

It performs the menu print.

(2) Print Demo

It performs a demo print.

(3) Print Fonts

It prints font samples.

(4) Cleaning

It performs special print to clean the charge roller.

4 - 4

(5) Print File

It performs a test file print. Printer emulation is stipulated by a file suffix. xxx.HBP (Hiper-W emulation)

xxx.BIN (PCL emulation) xxx.PRN (Ditto) xxx.aaa (Ditto: aaa may be any strings other than the above.)

Figure 4-3

2-5 Option Menu Button

It performs operation selected in the Option Button Menu. Available operations are as follows.

(1) Reset Engine

It resets all the Engine Menu contents to the factory default setting.

(2) EEPROM Upload

It upload the contents of the Engine Menu Setting and Engine Counter data into the memory on the PC.

(3) EEPROM Download

It download the Engine Menu Setting and Engine Counter data from the memory on the PC and copy it to the EEPROM on the printer.

4 - 5

(4) Product set

Product (ID) of the printer is set. Product which is available at present is only MDL

(Model). Up to 32 alphanumeric characters can be inputted.

The corresponding type is the type supporting the ID down- load command. For an

unsupported type, no character can be inputted as light color display.

(5) Printer name set

The corresponding type is changed.

Figure 4-4

4 - 6

2-6 Correspondence to non-corresponding product ID printer

When the ID of the printer is not corresponding, a dialog for selecting the corresponding printer name is displayed. When the printer name is set, it is registered in the initialization file and processed as a corresponding printer also for the next and subsequent startup. The following is a display example of a printer set dialog.

Figure 4-5

The following five types of printer names can be set. OKIPAGE 4w OL400w or OL410e/W OL600e or OL600e/W OL610e or OL610e/W OKIPAGE 4w Plus OKIPAGE 6ex or OKIPAGE 6e

4 - 7

2-7 Reload Button

The same setting as in the starting up of an application software can be made. It reads out the settings of the printer being connected.

It is used to change the printer while running the same application program on the PC.

2-8 About Button

It displays information on the Maintenance Utility and the printer firmware.

2-9 Exit Button

It ends the Maintenance Utility.

Figure 4-6

4 - 8

2-10 Setup Dialog

The Setup Dialog is displayed when "Setup" is selected from the system menu items on the Main Menu Dialog.

In the Setup Dialog, selection of printer languages and printer port is available.

Figure 4-7

(1) Printer Port

For selecting a printer port.

(2) Cancel

For canceling the setting and returning to the Main Menu Dialog.

(3) OK

For initializing the settings to reflect all the settings in the menu.

4 - 9

4.2 Adjustment (OKIPAGE 6ex)

This chapter describes the adjustment necessary when replacing a part. The adjustment is made by changing the parameter value set in EEPROM on the Main Control PCB. The parameter can be set by the key operation from the operator panel. This printer has three kinds of maintenance modes, and it is necessary to select one of the modes when replacing a part.

4.2.1 Maintenance Modes and Functions 1 User Maintenance Mode

This mode is being released to end-users, but it is rarely accessed. To enter into the user maintenance mode, turn the POWER switch on while holding the MENU key down.

Function There are following five functions:

• Hex dump • Drum counter reset

• Menu reset • Operator panel menu disable

• X-adjust / Y-adjust Detailed descriptions of these functions are provided in Appendix C, DIAGNOSTICS

TEST.

2 System Maintenance Mode

Note:

To enter into the system maintenance mode, turn the POWER switch on while holding the RECOVER key down.

Function There are following five functions:

• Page count display

• Page count printing enable/disable • EEPROM reset

• Rolling ASCII continuous printing

• HIPER-W ENABLE/DISABLE

• SIDM ENABLE/DISABLE

This mode is used only by service persons and it should not be released to the endusers.

Detailed descriptions of these functions are provided in Appendix C, DIAGNOSTICS TEST.

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3 Engine Maintenance Mode

Note:

To enter into the engine maintenance mode, turn the POWER switch on while holding the FORM FEED and ENTER keys down.

Function There are following functions :

• Head drive time setting • Drum count total display

• Printing start position setting • Engine reset

• Drum count display • Factory adjustment

• LED head width setting • LED head type setting

• Transfer current setting • Optical LED head (Mounting head type)

• Setting of strobe time

• Selection of standby temperature

• Engine test

This mode is used only by service persons, and it should not be released to the end users.

(Adjustment method for adjustment head)

Note:

Detailed descriptions of these functions are provided in Appendix C, DIAGNOSTICS TEST.

"Printing start position setting" is for shipping. Do not change its default value.

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4.3 Adjustment When Replacing a Part

4.3.1 Adjustment at the Time of Part Replacement (OKIPAGE6e: 300dpi LED head) The following table lists parts that require adjustment after replacement.

Parts

LED head

Image drum unit Drum counter reset (Refer to the user's manual for details.)

Control P.C.B. Upload/Download EEPROM data

LED head drive time

Required Adjustment

1 LED head drive time setting

Caution:

Do not change the LED head drive time when the luminous energy indicated on the new LED head is the same as that of the old LED head.

The LED head drive time is set in the LED Head Marking No. on the Engine Menu of the Maintenance Utility. Input the value printed on the serial No. label on the LED head. The last 3 digits indicates the luminous energy of the LED head. (See Fig. 4-2.)

• LED head luminous energy

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The last 3 digits indicates the luminous energy of the LED head.

Luminous energy indications

070

314

OKIPAGE6e

• Setting of LED Head Drive Time Drive time of the LED head is set by setting the parameter of drive time of EEPROM

according to the luminous intensity marking on the LED head. a. Corresponding table of luminous intensity marking and drive time parameter

Luminous intensity

marking on LED head

056 ~ 062 34

063 ~ 065 33

066 ~ 069 32

070 ~ 076 31

077 ~ 082 30

083 ~ 088 29

089 ~ 096 28

097 ~ 104 27

105 ~ 112 26

113 ~ 121 25

122 ~ 131 24

Drive time parameter

Luminous intensity

marking on LED head

132 ~ 142 23

143 ~ 154 22

155 ~ 167 21

168 ~ 180 20

181 ~ 195 19

196 ~ 211 18

212 ~ 228 17

229 ~ 247 16

248 ~ 268 15

269 ~ 290 14

291 ~ 313 13

Drive time parameter

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4.3.2 Adjustment When Replacing a Part (OKIPAGE6ex: 600dpi LED head) Adjustment is necessary when replacing any one of the following parts.

Parts

LED head

Image drum unit Drum counter reset (Refer to the User's Manual.)

Main Control Board EEPROM data Upload/Download (See 4.3.1 4.)

1 Setting of LED Head Drive Time

Note:

• Luminous Intensity Marking Label

When the luminous intensity marking of the replacement LED head (new part) is same as that of the removed LED head (old part), do not set the LED head drive time.

LED head drive time Head Type

Required Adjustment

401326

403579

1224G2

7 3

. . . . .

73000123400101100

. . . . .

74000123400101100

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Last 3 digits represent the LED head marking number.

Luminous intensity marking

027

154

OKIPAGE6ex

• Setting of LED Head Drive Time Drive time of the LED head is set by setting the parameter of drive time of EEPROM

according to the luminous intensity marking on the LED head. a. Corresponding table of luminous intensity marking and drive time parameter

Luminous intensity

marking on LED head

027 ~ 028 27

029 ~ 030 26

031 ~ 032 25

033 ~ 035 24

036 ~ 037 23

038 ~ 040 22

041 ~ 043 21

044 ~ 046 20

047 ~ 049 19

050 ~ 052 18

053 ~ 057 17

058 ~ 060 16

061 ~ 064 15

Drive time parameter

Luminous intensity

marking on LED head

065 ~ 069 14

070 ~ 073 13

074 ~ 079 12

080 ~ 084 11

085 ~ 090 10

091 ~ 096 9

097 ~ 103 8

104 ~ 110 7

111 ~ 118 6

119 ~ 126 5

127 ~ 135 4

136 ~ 144 3

145 ~ 154 2

Drive time parameter

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Setting

Example:

Method for setting the parameter to 19 (for case where the previous parameter setting was 8).

Operation

Turn the POWER switch on while holding the FORM FEED and ENTER keys down.

Press the MENU key.

Press + or - key, until "19" is displayed.

Press the ENTER key.

LCD display after operation

ENG MNT

OPT HEAD

600-4W

LED HEAD

No. 8 *

LED HEAD

No. 19

The item of “OPT HEAD” is always 600-4W when the 600dpi head is used.

Displays previous parameter No.

Turn the POWER switch on while pressing the FORM FEED and ENTER keys.

XXX: HP4, AUT, WIN or HEX DUMP

LED HEAD

No. 19 *

HEAD TYPE

TYPE1

ON-LINE

XXX

Parameter 19 is set to EEPROM (* is displayed on LCD).

There are two types of “HEAD TYPE” available (TYPE-1, TYPE2D4). The type is set as shown below according to the content of the bar code label attached on the head. Content of the bar code label on the head

xxxxxx

. . . . .

73000123400101100

When the numeral of upper two digits under the bar code is 73, TYPE 1 is selected. When the numeral of upper two digits under the bar code is 74, TYPE2D4 is selected.

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4.3.3 Uploading/Downloading EEPROM data When the controller printed circuit board is replaced, the contents of the old EEPROM shall

be copied to the new EEPROM on the new board to preserve customer settings. For the purpose, use the EEPROM operation on the Option of the Maintenance Utility. (See Fig. 4-4.) To copy follow the steps below.

(1) Be sure to confirm that the printer and the PC are connected with a centronics I/F cable.

Then execute the Maintenance Utility. (Note: Printer driver shall be deinstalled.) (2) Select the Option on the Maintenance Utility. (3) Click the "UPLOAD EEPROM" button on the "EEPROM Operations". (4) The contents of the EEPROM data is displayed on the "DIALOG" of the Maintenance

Utility. The contents of the old EEPROM is now copied into the memory of the PC. (5) Replace the controller P.C.B. with a new one while it displays the above "DIALOG". (6) After the replacement, click "Download EEPROM" on the "EEPROM Operations".

EEPROM upload has been completed. In case of troubles such as centronics I/F failure, etc. EEPROM data may not be uploaded

properly. In such case, it is necessary to adjust the following setitngs manually after the replacement using the Maintenance Utility.

• LED driver time (See 4.3.1.)

• Factory setting (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 About 2,000 sheets of • LED head. Consumables paper have been printed.

• Image drum About 20,000 sheets of Consumables

cartridge paper have been printed.

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 (vacuum) to clean inside the printer.

Note:

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

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.

Note:

The LED lens array must be cleaned with an LED head cleaner, provided with each toner kit.

White lines or stripes (void, light printing)

5 - 1

(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 cleaner

LED lens array

(2) Throw the cleaner away.

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6. TROUBLESHOOTING PROCEDURES

Oki PAGE 6ex User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

CONTENTS

1. CONFIGURATION

3. PARTS REPLACEMENT

4. ADJUSTMENT

5. PERIODICAL MAINTENANCE