Okidata OKIPAGE 8p, OKIPAGE 8w MAINTENANCE MANUAL

Thank You for purchasing this

Click Here for more Factory Service

Manuals for other Computer and

Printer / Copier Manufacturers

from PCTECHINFO!

OKIPAGE

8p /8

LED Page Printer

Maintenance Manual

ODA/OEL/INT

1998.11. 4 Rev.1

All specifications are subject to change without notice.

40909901TH

PREFACE

This Maintenance Manual describes the field maintenance methods for 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.

CONTENTS

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

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

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

1.3 Option(OKIPAGE 8p Only) ................................................................ 1 - 3

1.4 Specification ...................................................................................... 1 - 4

1.5 Safety Standards ............................................................................... 1 - 6

1.5.1 Certification Label.................................................................................... 1 - 6

1.5.2 Warning Label ......................................................................................... 1 - 6

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

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

2.2 Power Supply Unit ............................................................................. 2 - 6

2.3 High-Voltage Power Supply Board .................................................... 2 - 6

2.4 Electro-Photographic Processor........................................................ 2 - 8

2.5 Electro-Photographic Process ........................................................... 2 - 12

2.5.1 Explanation of Each Process Operation.................................................. 2 - 14

2.6 Paper Jam Detection ......................................................................... 2 - 20

2.7 Toner Low Detection.......................................................................... 2 - 22

2.8 Cover Open ....................................................................................... 2 - 23

2.9 Detecting I/D Unit existence .............................................................. 2 - 24

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

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

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

3.3 Replacing Parts ................................................................................. 3 - 9

3.3.1 Hopper Plate ........................................................................................... 3 - 9

3.3.2 LED Head and Head Spring.................................................................... 3 - 10

3.3.3 Transfer Roller......................................................................................... 3 - 11

3.3.4 How to remove Cover Upper Assy .......................................................... 3 - 12

3.3.5 Upper Cover Assy ................................................................................... 3 - 13

3.3.6 High-Voltage Power Supply Board (P2H) ............................................... 3 - 14

3.3.7 Top Cover Assy and Flat Cable Assy...................................................... 3 - 15

3.3.8 Paper Holder ...........................................................................................3 - 16

3.3.9 Side Plate M and Idle Gear ..................................................................... 3 - 17

3.3.10 Heat Assy ................................................................................................ 3 - 18

3.3.11 Drive Shaft E (Eject) and Eject Roller ..................................................... 3 - 19

3.3.12 Pressure Roller B (Back Up Roller)......................................................... 3 - 20

3.3.13 Separator Guide ...................................................................................... 3 - 21

3.3.14 Pulse Motor (Main) .................................................................................. 3 - 25

3.3.15 Hopping Shaft Assy ................................................................................. 3 - 26

3.3.16 Regist Roller ............................................................................................ 3 - 27

3.3.17 Paper Sensor E, Paper Sensor Exit and Toner Sensor Assy ................. 3 - 28

3.3.18 Base Plate ............................................................................................... 3 - 29

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

4.1 Adjustment Types and Functions ...................................................... 4 - 1

4.1.1 Printer Driver ........................................................................................... 4 - 1

4.1.2 Engine Maintenance Utility ...................................................................... 4 - 2

4.2 Adjustment When Replacing a Part................................................... 4 - 2

4.2.1 Setting LED Head Drive Time ................................................................. 4 - 2

4.2.2 Uploading and Downloading EEPROM Data .......................................... 4 - 3

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

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

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

5.2.1 Cleaning the 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 Notes When Correcting Image Problems .......................................... 6 - 1

6.4 Preparation Before Troubleshooting.................................................. 6 - 1

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

6.5.1 Status Monitor Message List ................................................................... 6 - 3

6.5.2 Status Message Troubleshooting ............................................................ 6 - 7

6.5.3 Image Troubleshooting ............................................................................ 6 - 13

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

7.1 (a)Interconnect Signal Diagram (OKIPAGE 8p) ................................ 7 - 1

(b)Interconnect Signal Diagram (OKIPAGE 8w)................................ 7 - 2

7.2 PCB Layout........................................................................................ 7 - 3

7.2.1 Main Control Board (NMA PCB) (OKIPAGE 8p) ..................................... 7 - 3

7.2.2 a) Main Control Board (HBY PCB) (OKIPAGE 8w EPROM type) ........... 7 - 4

b) Main Control Board (H63 PCB) (OKIPAGE 8w Mask ROM type)....... 7 - 5

7.2.3 High-Voltage Power Supply Board .......................................................... 7 - 6

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

APPENDIX A LOCAL PRINTING/ DEMO PAGE PRINTING ................... A - 1

APPENDIX B PARALLEL INTERFACE ................................................... B - 1

APPENDIX C MAINTENANCE UTILITY GUI MANUAL (OKIPAGE 8P).. C - 1
APPENDIX D MAINTENANCE UTILITY GUI MANUAL (OKIPAGE 8W). D - 1

1. CONFIGURATION

1. CONFIGURATION

1.1 System Configuration

The OKIPAGE 8p/8w consists of a control block, a power supply unit, and an engine block. (See
Figure 1-1.)

ENGINE UNIT

Paper Feed Mechanism

Hopper

Plate

Electro-photographic

Processor

Main High-Voltage

Power Supply Board

Sub High-Voltage

PowerSupply Board

Power Supply Unit

Main Control Board

4MB Memory

Expansion Board

(OKIPAGE 8p Only)

Figure 1-1

1 - 1

1.2 Printer Configuration

The printer unit consists of the following five hardware components:

• Electro-Photographic Processor

• Paper Feeder

• Main Control Board

• High-Voltage Power Supply Board (two Boards)

• Power Supply Unit
Figure 1-2 is the configuration of the printer unit.

Upper Cover Assy

I/D Unit (Type 6)

Top Cover Assy

High-voltage Power
Supply Board (P2H)

Heat Assy

Main Control Board

High-voltage Power
Supply Board (P6L)

1 - 2

1.3 Option(OKIPAGE 8p Only)

(1) 4MB N4A-PCB Option Memory Board

1 - 3

1.4 Specification

(1) Type Desktop
(2) Outside dimensions Height 6.7” (170 mm)

(excludes protruding Width 12.8” (324 mm)
portion) Depth 8.1” (207 mm)

(3) Weight 4.2 kg (8w) (with Image Drum Cartridge and Toner Cartridge)

(4) Development method Dry non-magnetic development system

Exposure method LED stationary head

(5) Paper used <Type>

4.3 kg (8p)

• Standard paper
– Xerox 4200 (20 lbs)

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

<Size>

14" (355.6 mm) x 8.5" (215.9 mm) (Max.)
5" (127mm) x 3" (76.2mm) (Min.)

<Thickness>

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

ency), 16 to 32 lbs (60 to 120g/m2)

(6) Printing speed First print: 13 seconds (A4) (after warm-up)

Continuous print: 8.1 sheets/minute (Letter)

7.7 sheets/minute (A4)

Warm-up time: 35 seconds (120 VAC for ODA, 230

VAC for OEL/INT) (at room tempera-

ture 77 ˚F (25 ˚C))
(7) Paper feeding method Automatic paper feed or manual paper feed
(8) Paper delivery method Face up
(9) Resolution 600 dpi x 600 dpi (OP8w) 600 dpi x 1200 dpi (OP8p)
(10) Power input 230 VAC ±10% (for OEL/INT)

120 VAC +6%, -15% (for ODA)

(11) Power consumption OP8w OP8p

Peak: Approx. 450W 450W
Typical operation: Approx. 160W 180W
Idle: Approx. 32W 32W
Power save mode: Approx. 4W 6W

1 - 4

(12)Temperature and humidity

During operation

In storage

Caution:

Temperature and humidity in storage are measured with the OKIPAGE 8p/8w
being packed; they are valid for one year.

Temperature

10 to 32 ˚C

–10 to +43 ˚C

20 to 80% RH (relative humidity)

10 to 90% RH (relative humidity)
No condensation is permissible.

Humidity

(13)Noise During operation: Avg. 50 dB (A), slow (without peak sounds)

(conformity with ANSI) Standby: Background level

(14)Consumables Toner cartridge kit 1,500 (5% duty)

........

45g cartridge kit

Image drum cartridge 10,000 (at continuous printing)

1 - 5

1.5 Safety Standards

1.5.1 Certification Label
The safety certification label is affixed to the following location of the OKIPAGE 8p/ 8w

1.5.2 Warning Label
Warning labels are affixed to the locations that may cause bodily injury.
During maintenance, do work with enough care while following instructions on these warning

labels.

For OEL, OKI-INT

1 - 6

For ODA, OEL, OKI-INT

For China, TAIWANFor Korea

2. OPERATION DESCRIPTION

2. OPERATION DESCRIPTION

The OKIPAGE 8p/8w consists of a main control board, two high-voltage power supply board, a
power supply unit, and an electro-photographic processor. The OKIPAGE 8p/8w receives print
data from a higher-level interface and sequentially stores it in memory. The OKIPAGE 8p/8w
decodes and edits the received data while storing print data from the interface in memory. It
sequentially transfers the edited data to the LED head for each dot line. The electro-photographic
processor then prints the data on sheets of paper.

The display of the higher-level host is used for device operation and status display.
Figure 2-1 is the block diagram of the OKIPAGE 8p/8w.

2 - 1

PLUNGER LED HEAD

Motor

2 - 2

Parallel

I/F

CENT

LS07

HEAD2HEAD1PJ

+5V+26V

POWER

MOTOR Main PCB NMA-

0V5V

Motor Driver

MTD2005F

CPU

(R3000)

Data Bus

Address Bus

OSC

7MHz

0VP0V

RST

EEPROM

Serial I/F

(x16)

LC26023A

1kb

OSC

10MHz

LSI

HIVOL

DRAM 2MB

M-ROM
4M x 16

Mask ROM 8MB

HC244

HIVOL2

Red
Amber

Amber

DRAM

1M x 16

0V

OPTION

O
P

T

I
O
N

PCB N4A-

DRAM

1M x 16

DRAM 4MB

Power Supply Unit

High Voltage Power Unit

P2H

Figure 2-1-1 Block Diagram (OKIPAGE 8p)

High Voltage Power Unit

P6L

ID Unit

PLUNGER LED HEAD

Motor

2 - 3

Parallel

I/F

CN4

LS07

+5V+26V

HEAD2HEAD1CN8

CN2

CN7

0V5V

0VP0V

Motor Driver

MTD2005F

CPU

(nX8)

PCB H63-ONLY

Internal

MASK ROM

62KB

OSC

16MHz

Serial I/F

DRAM Bus

(Data : 4)

(Address : 11)

RST

EEPROM

1kb

EPROM

64KB

LS373

PCB HBY-ONLY

DRAM

512kB

DRAM
1M x 4

HC125

CN10CN1

High Voltage Power Unit

Power Supply Unit

Figure 2-1-2 Block Diagram (OKIPAGE 8w)

P2H

High Voltage Power Unit

P6L

ID Unit

2.1 Main Control Board

The main control board consists of a one-chip CPU, a program ROM, a DRAM, an EEPROM, a
host interface circuit, and a mechanism driving circuit. The mechanism driving circuit consists of
a LED head, a main motor, and an electromagnetic clutch.
Note: There are 2 type Main Control Boards for OP 8w EPROM is mounted on one board (HBY-

PCB) On the other board (H63-PCB), no EPROM is mounted. (the firmware is in the
masked CPU). The appearance of these PCB's are completely different each other.
(Refer Section 7.2.2).

(1) One-chip CPU

• OKIPAGE 8p
The one-chip CPU is a custom CPU (32-bit internal bus, 16-bit external bus, 28-MHz clock).

This CPU has the functions listed in the table below.

Built-in Device Function
DRAM controller
DMA controller

Parallel interface controller
Video output port

LED STB output port
Timer

I/O port

Controls DRAM.
Transfers image data from Parallel I/F to DRAM, from DRAM to a video output port and

between CPU and DRAM.
Controls the parallel interface.
Controls LED head.

Generates various control timings for monitoring paper feeding and a paper size.
Inputs and outputs the sensor signals and motor signals, etc.

Also performs I/O for EEPROM.

• OKIPAGE 8w
The one-chip CPU is a custom CPU (8-bit internal bus, 8-bit external bus, 16-MHz clock)

incorporating mask ROM and CPU peripheral devices. This CPU has the functions listed in
the table below.

Built-in Device Function
DRAM controller
DMA controller

Controls DRAM.
Transfers image data from Parallel I/F to DRAM, from DRAM to a video output port and

between CPU and DRAM.
Parallel interface controller
Video output port

LED STB output port
Timer

I/O port

A/D converter

Controls the parallel interface.

Controls LED head.

Generates various control timings for monitoring paper feeding and a paper size.

Inputs and outputs the sensor signals and motor signals, etc.

Also performs I/O for EEPROM.

Inputs the feedback signals from a high-voltage generation circuit and thermistor signal.

2 - 4

(2) • Program ROM (OKIPAGE 8w Only)

Program ROM contains a program for the equipment. EPROM is used as program ROM.
(EPROMtype PCB) For details PCB Layout see Section 7.2.2.

• Program & Font ROM (OKIPAGE 8p Only)
The Program & Font ROM store the various types of emulation program and fonts.

Mask ROM is used for a Program & Font ROM.

(3) DRAM

DRAM is used as resident memory.

(4) EEPROM

EEPROM holds the following data:

• Menu data

• Counter value

• Adjustment value

(5) Parallel interface

The parallel interface receives parallel data from the host; it conforms to the Centronics
specification. IEEE-1284 B: – directional parallel is supported.

(6) RAM Board (OKIPAGE 8p option)

4MB (2MB DRAM x 2) of DRAM is resided on the RAM board.

2 - 5

2.2 Power Supply Unit

The power supply unit supplies +5 V and +26 V to the main control board according to 230 VAC /
120 VAC.

Output voltage Application

+5 V

+26V

Used to generate a logic circuit and a high voltage.
Used to drive the motor and electromagnetic clutch.

The power supply unit also contains a heater drive circuit.

2.3 High-Voltage Power Supply Board

(1) High-Voltage power supply circuit

The high-voltage power supply circuit generates the following voltages required for the
electro-photographic processor from +5 V according to the control sequence from the main
control board. When the cover is open, +5 V supply is automatically interrupted to stop high­voltage output.

Output Application

CH

–1.3 KV

DB

–265 V/+265 V

SB

–550 V/ 0 V

CB

+400 V/–1.35 KV

TR

+500 V ~ +3.5 KV/–750 V

Voltage

Voltage to be applied to a charge roller.
Voltage to be applied to a developing roller.
Voltage to be applied to a sponge roller.
Voltage to be applied to a cleaning roller.
Voltage to be applied to a transfer roller.

P2H-PCB
P2H-PCB
P2H-PCB
P6L-PCB
P2H-PCB

Remarks

Caution:

The TR voltage varies with medium and transfer roller impedance.

2 - 6

(2) Sensors

The high-voltage power supply board consists of the high-voltage power supply circuit that
supplies power to the electro-photographic processor system and the photosensor that
detects a paper feeding system and toners.

Figure 2-2 shows the sensor layout drawing.

Exit roller

Outlet sensor

Heat roller

Transfer roller

Paper sensor

Toner
sensor
assy

Manual feed sensor

Paper feeding direction

Feed roller

Hopping

roller

Figure 2-2

Sensor Function Sensing State

Manual feed
sensor

Paper sensor

Outlet sensor

Toner sensor

Monitors whether paper was inserted into the manual feed sensor
section.

Detects the leading part of the paper.
Monitors paper feeding.

Monitors paper feeding and the paper size according to the paper
sensor arrival and passing time.

Detects the low toner status.

ON: Paper exists.
OFF: No paper exists.

ON: Paper exists.
OFF: No paper exists.

ON: Paper exists.
OFF: No paper exists.

ON (long): Toner low
OFF (short): Toner High

2 - 7

2.4 Electro-Photographic Processor

The electro-photographic processor prints out the image data to be sent from the main control
board on sheets of paper. Figure 2-3 shows the layout drawing of the electro-photographic
processor.

(1) Image drum unit

The image drum unit makes a toner adhere to the formed electrostatic latent image with static
electricity. This electrostatic latent image is formed by the lights irradiated from LED heads.

(2) Electromagnetic clutch

The electromagnetic clutch controls the rotation of the hopping roller according to signals
from the control block.

2 - 8

Exit roller

Heat roller

(ø 19.910)

6.85

10

OFF

ON

26.50

Outlet sensor

Cleaning roller

(ø 9.000)

Charge roller

(ø 9.000)

6.77

LED head

Drum roller

(ø 16.000)

Developing roller

(ø 14.000)

17.23

12.72

23.18

20.32

64.60

Single tray

Transfer roller

(ø 15.000)

Hopping roller

OFF

32.00

10

Tray printing

10

ON

OFF

Manual feed sensor

Manual printing

Feed roller

Paper sensor

Figure 2-3 Layout Drawing of Electro-Photographic Processor

2 - 9

(3) Pulse motor (Main)

This pulse motor of 48 steps/rotation is two-phase excited by the signal from the main control
board; it performs feeding control by switching normal rotation to reverse rotation or vice
versa and turning on/off the electromagnetic clutch. The relationship between the main
motor, electromagnetic clutch, resist gear, drum gear, hopping roller is shown in the table
below and on the subsequent pages.

Main Motor Electromagnetic Clutch

Normal rotation

Reverse rotation

OFF

ON

OFF

Hopping Roller

Non-rotation

Rotation

Non-rotation

Regist Gear Drum Gear Operation

Non-rotation

Rotation
Rotation

Rotation
Rotation
Rotation

(4) LED head

The shift and latch registers receive image data from the main control board for each dot line.
4,992 LEDs are driven to radiate the image drum.

(5) Heat Assy

The heat Assy consists of a heater, a heat roller, a thermistor, and a thermostat.
The power supply unit supplies AC voltage to the heater according to the HEATON signal

from the main control board to heat the heat roller. The main control board monitors the heat
roller temperature via the thermistor and keeps the temperature constant by turning on/off
the heater AC voltage supply.

If the heat roller temperature rises abnormally, the thermostat of the heater voltage supply
circuit functions to forcibly suspend the AC voltage supply.

Warm-up

Hopping

Prinitng

2 - 10

Exit roller

Heat roller

Transfer roller

Cleaning roller

CH roller

Drum roller

Developing roller

Outlet

sensor

Paper sensor

Hopping roller

TRAY printing

Feed roller

Manual

feed

sensor

Manual printing

2

Roller to be driven by reverse

rotation of pulse motor (Main)

1

Motor to be driven by normal

rotation of pulse motor (main)

Roller control by pulse motor (main)

1

Normal rotation of pulse motor (main): Drum roller, transfer roller, cleaning roller, CH roller, developing roller, heat roller, exit roller rotation

2

Reverse rotation of pulse motor (main): Drum roller, transfer roller, cleaning roller, CH roller, developing roller, heat roller, exit roller, feed roller,

hopping roller rotation

Hopping operation from the tray, however, is performed when the electromagnetic clutch is turned on.

Figure 2-4 Schematic Drawing of OKIPAGE8p/8w Paper Feeding

2 - 11

2.5 Electro-Photographic Process

(1) Electro-photographic process

The electro-photographic process is outlined below.
1 Charging

The surface of the OPC drum is charged negatively and uniformly by applying the DC
voltage to the CH roller.

2 Exposure

Light emitted from the LED head irradiates the negatively charged surface of the OPC
drum. The surface potential of the irradiated surface attenuates to form the electrostatic
latent image corresponding to the image signal.

3 Development and residual toner recovery

The negatively charged toner is brought into contact with the OPC drum, adhering to the
electrostatic latent image on the OPC drum by static electricity. This adhesion causes
the electrostatic latent image to change to a visible image.

At the same time, the residual toner on the OPC drum is attracted to the developing
rollerby 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 Cleaning

The cleaning roller temporarily attracts the residual toner on the transferred OPC drum
with static electricity, then returns the toner to the OPC drum.

6 Fusing

The transferred unfused toner image is fused to a sheet of paper by applying heat and
pressure to the image.

Figure 2-5 is a flow for the electro-photographic process.

2 - 12

Paper

holder

section

Manual feed

Control signal

LED head

Power

supply

Exposure

Toner

cartridge

roller

Developing

Paper

supply

Transfer

Manual feed

roller

Hopping

Feed roller

Paper sensor

Transfer roller

sensor

: OPC drum rotation direction

: Paper feeding path

Power

supply

roller

Charge

Paper delivery

Charging

Power

supply

Cleaning Development

roller

Cleaning

Paper feeding

Outlet sensor

roller

Paper eject

Fusing

Power

supply

roller

Back-up

Heat roller

Figure 2-5 Flow for Electro-Photographic Process

Paper ejection Fusing Cleaning Transfer Development Paper feed Paper hopping

2 - 13

2.5.1 Explanation of Each Process Operation
(1) Hopping

As shown in the figure below, the clutch for hopping is turned on/off according to current ON/
OFF to a coil.

When the clutch is OFF

Coil

Hopping gear

Spring for resetting

Clutch plate

Magnetic
substance plate

Pin

Hopping roller

When the clutch is ON

Hopping shaft

Hopping gear

Engagement section

Clutch plate

When the clutch is on, the hopping gear engages with the clutch plate to rotate the hopping
roller.

When the clutch is off, the hopping gear is separated from the clutch plate by the spring for
resetting, disabling the rotation of the hopping roller.

2 - 14

(2) Printing and warm-up

At warm-up

Regist gear

Hopping gear

Triple gear

Transfer gear

Idle gear

Planetary gear

a"

a'

a

Gear A

Pulse motor (main)

Rotate the pulse motor (main) in the a direction. The planetary gear rotates in the a’ direction,
dislocating its position in the a” direction. This causes the planetary gear to be separated from
gear A. The hopping gear will not rotate. The triple gear and transfer gear rotate via the idle
gear to drive the EP unit.

At printing

Triple gear

Transfer gear

Regist gear

Idle gear

Planetary gear

b"

b'

b

Hopping gear

Gear A

Pulse motor (main)

The paper is further advanced in synchronization to the print data.

2 - 15

(3) Charging

Charging is performed by applying DC voltage to the charge roller that is in contact with the
surface of the OPC drum.

High-

voltage

power
supply

Charge roller

OPC drum

(4) Exposure

High-

voltage

power
supply

Light emitted from the LED head irradiates the negatively charged surface of the OPC drum.
The surface potential of the irradiated surface attenuates to form the electrostatic latent
image corresponding to the image signal.

LED head

Charge roller

LED head

OPC drum

2 - 16

Paper

Image drum

(5) Development

The electrostatic latent image on the surface of the OPC drum is changed to a visible toner
image by applying a toner to it. Development is performed in the contact part between the
OPC drum and developing roller.

1 The sponge roller negatively charges a toner and applies it to the developing roller.

Developing blade

Charge roller

Developing roller

OPC drum

Sponge roller

2 The toner applied to the developing roller is thin-coated by the developing blade.
3 A toner adheres to the exposure part of the OPC drum in the contact part between the

OPC drum and developing roller. This causes the electrostatic latent image to be
changed to a visible image.

2 - 17

(6) Transfer

The transfer roller is composed of conductive sponge material. This roller is set so that the
surface of the OPC drum and sheets of paper will adhere closely.

A sheet of paper is placed on the surface of the OPC drum and the positive charge opposite
to the negative charge of a toner is applied from the reverse side by the transfer roller.

When a high negative voltage is applied from the power supply to the transfer roller, the
positive charge induced on the surface of the transfer roller moves to the paper side at the
contact part between the transfer roller and the sheet of paper. The positive charge on the
lower side of the sheet of paper then causes the negatively charged toner adhering to the
surface of the OPC drum to move to the upper side of the sheet. This enables transfer to the
sheet of paper.

OPC drum

Transfer roller

Paper

High-voltage

power supply

2 - 18

g

(7) Fusing

The transferred unfused toner image is fused to a sheet of paper because heat and pressure
are applied when it passes between the heat roller and back-up roller.

The Teflon-coated heat roller contains a 400 W heater (Halogen lamp) that heats the heat
roller. The thermistor on the surface of the heat roller keeps the temperature of the heat roller
constant. A thermostat is also installed for safety. If temperature rises abnormally, this
thermostat opens to suspend voltage supply to the heater.

The back-up roller is pressurized to the heat roller by the pressure spring on each side.

Thermistor

Separation claw

Heater roller

Heater

Back-up roller

(8) Cleaning

Pressure Sprin

After transfer has terminated, the cleaning roller temporarily draws in the untransferred
residual toner adhering to the OPC drum with static electricity and then returns it to the OPC
drum.

OPC drum

Cleaning roller

High-voltage

power supply

Transfer roller

2 - 19

2.6 Paper Jam Detection

The OKIPAGE 8p/8w monitors the paper status when the power supply is on and during printing.
In the following cases, the OKIPAGE 8p/8w interrupts the printing process as a paper jam.
Printing can be recovered by opening the cover, removing the jammed paper, and closing the
cover.

Error

Cause of Error

Paper inlet jam ••Only the manual feed sensor detects "Paper exists" when the power supply is on.

The leading part of the paper does not reach the paper sensor although hopping
operation was performed three time.

Paper feed jam • The leading part of the paper does not reach the outlet sensor within a fixed time after it

has passed the paper sensor.

Paper outlet jam • The trailing part of the paper does not pass the outlet sensor within L mm after the

leading part of the paper has passed the outlet sensor.

2.52" (64 mm) L 15.77" (400.6 mm)

<=<

=

Paper size error • The trailing part of the paper does not pass the paper sensor within L mm after the

leading part of the paper has passed the paper sensor.

2.52" (64 mm) L 15.77" (400.6 mm)

<=<

=

Paper Feed Check List

Type of Error

Supervisory Sensor

Reference Value

Error

Pluse Minus

Paper feed error

Paper feed jam1

Paper size error

Paper outlet jam

Paper feed jam 2

Electromagnetic clutch ON/
Paper sensor ON

Paper sensor ON/
Outlet sensor ON

Paper sensor ON/
Paper sensor OFF

Outlet sensor ON/
Outlet sensor OFF

Paper end sensor OFF/
Outlet sensor OFF

2 - 20

69.8

122.9

2.52" (64 mm) L

<=<

=

15.77" (400.56 mm)

2.52" (64 mm) L

<=<

=

15.77" (400.56 mm)

121.9

35

20.0

—

45.0

20.0

—

—

—

45.0

20.0

Unit: mm

Pulse motor
(main)

Normal

rotation

OFF

Reverse

rotation

Electromagnetic
clutch

Manual feed
sensor

Paper sensor

Outlet sensor

Operation mode

OFF

ON

OFF

ON

OFF

ON

OFF

ON

Warm-up Paper feed Printing

Timing Chart for Paper Feed (Tray Feed)

2 - 21

2.7 Toner Low Detection

• Hardware configuration of toner sensor

The figure below shows the hardware configuration of the toner sensor.

Image drum unit

Agitation bar (iron)

Magnet

Toner sensor lever

Hardware Configuration of Toner Sensor

• Toner detection method

(1) Toner sensor monitoring conditions are shown in the figure below.

Toner sensor

Magnet draw-in

t1

T

Caution:

The toner sensor is not monitored when the drum is inactive.

(a) When the toner-low state continues twice, Toner Low occurs. (This state is monitored

at a cycle of 40 milliseconds.)

(b) When the toner-full state continues twice, Toner Low is released. (This state is

monitored at a cycle of 40 milliseconds.)

(c) When the toner sensor does not change over two cycles (T x 2), the toner sensor

alarm state occurs.

(d) After the EP unit has been replaced (after the drum counter has been reset), Toner

Low is not detected when the drum counter indicates 1 to 100 counts.

2 - 22

(2) The basic rotation cycle of the toner sensor is as follows:

Basic rotation cycle of toner sensor

T time

2.5 sec.

t1 > 0.64 sec.

0.64 sec. > t1 > 0.28 sec.

Toner low time
Toner full time

2.8 Cover Open

Opening the stacker cover turns off the microswitch on the high-voltage power supply board to
suspend +5 V supply to the high voltage power supply. This results in the stop of all high-voltage
outputs. At the same time, the CVOPN signal is issued to notify the main control board of the
switch status and cover open processing is executed.

2 - 23

2.9 Detecting I/D Unit existence

In this model, a micro switch may be activated, applying a high voltage to the machine under a
state where the cover is slightly opened. In this case, there is a fear that, when a user insert his
hand through the opening, he may be shocked unless an I/D Unit has been installed. (Safety
standard measures EN60950: 1992)
Therefore, with mechanism, an interlock system for micro switch shall be added if a machine has
no mechanism with I/D Unit inside. Also, for control, I/D Unit existence detection shall be
implemented according to the following method.

<Conditions for judging I/D Unit existence>

If a toner sensor does not change for 1.2 cycle of toner sensor basic rotation cycle soon after
powering on or closing cover, no installed I/D Unit shall be judged, stopping Warming Up motion
to shift the machine mode to light malfunction. But this error can be recovered by cover open and
close operation after installing I/D Unit.

I/D Unit existence detection time

The conditions for enabling this error should be as follows.

Valid condition In the case of 31 pages or more in total drum counter

Invalid condition

In the case of 30 pages or less in total drum counter, a significant malfunction
toner sensor error shall occur.

T time Remarks

3.04 sec. As the toner sensor monitors at intervals of 40 msec.
the fractional part should be rounded down.

But when the toner sensor breaks down with 31 or more counted in total at the drum, I/D Unit not
Install will be displayed without fail at power on. Even in this case, the machine should be in
printable state so that printing can be guaranteed until the completion of toner repair. (See the
drawing in the next page)

2 - 24

POWER ON

Abnormal toner sensor

waveform

Other cases

I/D Unit not Installed

displayed/informed

Cover open/close

Status_A Status_B

Abnormal toner sensor waveform

Abnormal toner sensor waveform

Normal Normal

Cover open/close

Cover open/close

Normal toner sensor waveform

Normal printing

Draft for specification

1. Toner sensor error/I/D Unit not Installed state should not be stored in the EEPROM.

2. A shift to I/D Unit not Installed and Toner Sensor Error shall be made at cover open or close.

Toner Sensor Error di

splayed/informed

Abnormal toner sensor waveform

ON LINE

OKIPAGE 8p/8w I/D Unit not Installed / Toner Sensor Error

2 - 25

Normal printing

Manual

Light

Medium-

Light

Medium

Medium-

Heavy

Heavy

Special1

(China)

Special2

(Swedish

Archive)

OHP Light

Medium-

Light

Medium

Medium-

Heavy

Heavy

Special1

(China)

Special2

(Swedish

Archive)

OHPMedia Type

TrayFeeding Tray

Paper size Excutive

Letter

Legal 14

Legal 13A4JIS B5A5A6

Monarch

COM-10DLC5

COM-9

Domestic postcard

and envelop equivalent

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

6

6

6

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

Note1

An envelop will be forcefully set to 6 PPM for manual feeding, narrow

in width, thick paper regardless of feeding tray and media type.

Domestic postcard and envelop equivalent will be forcefully set to

manual. (An inquiry to own country is required)

An envelop will be forcefully set to 6 PPM for manual feeding, narrow

in width, thick paper regardless of feeding tray and media type.

Note 1) Tray + OHP . OP 8p : not exist in the combination. (driver should not display it on GUI)

OP 8w : In the driver, OHP setting shall not be able to be selected on GUI for media type in tray. in the case of sending data, it shall be printed in OHP mode.

OKIPAGE 8p/8w printing speed

2 - 26

3. PARTS REPLACEMENT

3. PARTS REPLACEMENT

This chapter explains how to replace parts, assemblies, and units in the field.
The replacement procedures to be explained here include dismounting, not mounting. When

mounting parts, assemblies, and units, reverse the dismounting steps.

3.1 Precautions for Parts Replacement

(1) Be sure to dismount the AC cord and interface cable before replacing parts.

(a) Be sure to dismount the AC cord in the following procedures:

i) Turn off the POWER switch of the printer (“0“).
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) Be sure to reconnect the printer in the following procedures:

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

Disconnect

OFF

ON

(2) Do not disassemble parts as long as the printer is operating normally.
(3) Minimize disassembling. (Only the parts indicated in the parts replacement procedures can

be dismounted.)
(4) Use only the specified maintenance tools.
(5) Disassemble parts in the specified sequence; otherwise, parts may be damaged.
(6) Temporarily tighten small parts such as screws and collars to the original locations because

they tend to be lost easily.
(7) When handling ICs such as CPUs, ROM, and RAM and PC boards, do not wear gloves that

easily cause static electricity.

Reconnect

(8) Do not place PC boards directly on devices and floors.

3 - 1

[Maintenance Tools]
Table 3-1 lists the maintenance tools necessary for parts replacement.

Table 3-1 Maintenance Tools

No.

1

2

3

4

5

6

7

No. 1-100 Philips
screwdriver

No. 2-100 Philips
screwdriver

No. 3-100 Philips
screwdriver

No. 5-200 screwdriver

Digital multimeter (tester)

Pliers

Handy cleaner

Q'ty Use RemarksMaintenance Tools

1

1

1

1

1

1

1

2~2.5 mm screw

3~5 mm screw

[Maintenance Utility]

No.

1

Table 3-2 Maintenance Utility

Q'ty Use RemarksMaintenance Utility

Maintenance utility

1

3 - 2

3.2 Parts Layout

This section explains the layout of main parts.

[Upper Cover Assy] (OKIPAGE 8p)

Figure 3-1-1

3 - 3

[Upper Cover Assy] (OKIPAGE 8w)

Spur gear (A)

Hopper plate

Guide side (R)

Guide side (L)

Upper cover

Figure 3-1-2

3 - 4

[Base Frame Unit]

Top cover assy

LED head

Flat cable assy

Head spring

Paper guide (R)

Paper guide (L)

Hopper

spring

Stopper spring

Pressure roller (B)
(Back up roller)

Transfer roller

Paper
holder

Registration roller

Idle gear heat

Drive shaft E (eject)

Heat assy

Side plate M

Tension plate

Magnet H
(hopping shaft)

Hopping shaft assy

High-voltage power

supply board P2H

Sheet guide

Pulse motor

(Main)

Power sensor E

Figure 3-2

3 - 5

Roller holder

Hopping roller

Toner cartridge
unit (type 6)

I/D unit (Type 6)

[Base Plate Unit](OKIPAGE 8p)

Power supply unit

Main control board

Base plate assy

Figure 3-3-1

3 - 6

High Voltage Power
Supply board P6L

[Base Plate Unit](OKIPAGE 8w EPROM type)

Power supply unit

Main control board

Base plate assy

Figure 3-3-2

3 - 7

High Voltage Power
Supply board P6L

[Base Plate Unit](OKIPAGE 8w Mask CPU type)

Power supply unit

Main control board

Base plate assy

Figure 3-3-3

3 - 8

High Voltage Power
Supply board P6L

3.3 Replacing Parts

This section explains how to replace parts and assemblies.

3.3.1 Hopper Plate
(1) Remove two claws and dismount hopper plate 1.

1

3 - 9

3.3.2 LED Head and Head Spring
(1) Open top cover assy 1.
(2) Dismount the left clamp and LED head 2. Then, dismount flat cable assy 3.
(3) Dismount two head springs 4.

2

3

4

1

4

3 - 10

3.3.3 Transfer Roller
(1) Open top cover assy 1 and dismount I/D unit (Type 6) 2.
(2) Remove the washer TR 6 (make sure to do it)

1: Insert a flat-tip driver between the claw and the guide gear T 7 in a way of pushing gear

T 5 so that it hits the left side and rotate the driver.

2: Pull off the post of the gear T 5 from the hole of the claw by lifting the shaft of transfer

roller 3 with another driver while maintaining the avobe state in 1.

Guide gear T

Transfer roller

4

Gear T

Flat-tip driver

Claw

3

2

4

6

5

7

1

Label

3 - 11

3.3.4 How to remove Cover Upper Assy
(1) Unscrew screws on the rear part.

(2) Open Cover Top Assy. Inserting a screwdriver head into a slot marked with Ţ on the Plate

Base edge, turn the screwdriver and lift Cover Upper Assy upward. Repeat the same
procedure for another slot on the edge.

Positions to insert screwdriver

3 - 12

3.3.5 Upper Cover Assy
(1) Turn off the power switch and unplug the AC cord from the AC socket.
(2) Disconnect interface cable 1.
(3) Open top cover assy 2 and dismount I/D unit (Type 6) 3.
(4) Move paper guide (L) 4 and paper guide (R) 5 on the rear of the printer to the center.
(5) Remove two front claws of upper cover assy 6 and lift upper cover assy 6.
(6) Dismount spur gear (A) 7, guide slide (L) 8, and guide slide (R) 9.
(7) Dismount lens 0.(OP 8w)

Dismount lens A and swith B.(OP 8p)

7

1

9

8

2

5

0

A

6

B

3

4

3 - 13

3.3.6 High-Voltage Power Supply Board (P2H)
(1) Dismount upper cover assy. (See Section 3.3.5.)
(2) Remove three screws 1 and remove the cover 2 and draw out high-voltage power supply

board(P2H) 3.

(3) Disconnect all the cables 4 from high-voltage power supply board(P2H) 3 and dismount

high-voltage power supply board(P2H) 3.

Caution:

2

Note the following when assembling the high-voltage power supply board(P2H):

• Mount the high-voltage power supply board(P2H) with top cover assy removed
or open.

• Take care that cable 4 will not interfere with the paper sensor exit when it is
connected.

• Replacement parts of High-Voltage Power Supply Board (P6L) is see 3.3 18)

Paper sensor exit

4

1

1

3

4

3 - 14

3.3.7 Top Cover Assy and Flat Cable Assy
(1) Dismount the upper cover assy. (See Section 3.3.5.)
(2) Dismount the LED head. (See Section 3.3.2.)
(3) Press the left clamp outward and dismount the engagement and top cover assy 1. (Tension

spring 2 also comes off at the same time.)

(4) Disconnect connector HEAD1, HEAD2 on the control board and dismount flat cable assy 3.

1

OKIPAGE 8w Mask ROM type

3

2

3

OKIPAGE 8p
OKIPAGE 8w EPROM type

3

connector (HEAD1)

connector (HEAD2)

Note:

3 - 15

When reassembling these parts, make sure that
the flat cable assy is firmly fitted with both the
LED Head and connector Head 1 and Head 2.
An improper fit may damage the control board
and LED head.

3.3.8 Paper Holder
(1) Dismount the upper cover assy. (See Section 3.3.5.)
(2) Dismount paper holder 1.
(3) Unlock and dismount paper guide (L) 2 and paper guide (R) 3.
(4) Remove the claw and dismount hopper spring 4.
(5) Remove the claw and dismount stopper spring 5.

2

3

4

5

1

3 - 16

3.3.9 Side Plate M and Idle Gear
Perform parts replacement while making the base frame assy stand so that side plate M will face

upward.
(1) Dismount the upper cover assy. (See Section 3.3.5.)
(2) Remove two screws 1 and two claws, then dismount plate side M2.
(3) Dismount earth plate 3, two idle gears P 4, idle gear M5, idle gear 3R6, idle gear 2R7,

idle gear heat 8, regist bearing 9 and bearing gear 0.

8

0

7

5

3

4

9

6

4

2

1

1

3 - 17

3.3.10 Heat Assy
This section explains how to dismount the heat assy and parts in the assy.
<Dismounting the heat assy>
(1) Dismount the upper cover assy. (See Section 3.3.5.)
(2) Dismount the high-voltage power supply board (P2H). (See Section 3.3.6.)
(3) Remove two screws 1, disconnect connector 2, and dismount heat assy 3.

1

2

1

3

3 - 18

3.3.11 Drive Shaft E (Eject) and Eject Roller
(1) Dismount the upper cover assy. (See Section 3.3.5.)
(2) Dismount top cover assy. (See Section 3.3.7.)
(3) Remove two screws 1 from heat assy (Section3.3.10), lift the heat assy, and dismount idle

gear E (A) 2 and idle gear E (B) 3.
(4) Unlock and dismount drive shaft E (Eject) 4.
(5) Dismount two eject rollers 5.

5

4

1

3

2

1

3 - 19

3.3.12 Pressure Roller B (Back Up Roller)
(1) Dismount the upper cover assy. (See Section 3.3.5.)
(2) Dismount the high-voltage power supply board (P2H). (See Section 3.3.6.)
(3) Dismount the heat assy. (See Section 3.3.10.)
(4) Dismount the engagement with the left ground, then pressure roller B1. (Two bearing BUs

2 and two bias springs 3 also come off at the same time.)

1

2

4

3

2

3 - 20

3.3.13 Separator Guide
(1) Dismount the upper cover assy. (See Section 3.3.5.)
(2) Dismount the high-voltage power supply board (P2H). (See Section 3.3.6.)
(3) Remove four screws 1.
(4) Dismount inlet 2 from base frame 3.

<Dismounting inlet 2>

Insert a screwdriver into the hole on the side of base frame 3, remove the inlet claw from
base frame 8, and dismount inlet 2.

(5) Disconnect three cables 4 and connector A and dismount base frame 3. Then, remove

screw 0.
<Disconnecting connector A, B>

Dismount connector A by drawing it upward while pushing the clamp lever with a standard

screwdriver.
(6) Dismount the paper holder assy. (See Section 3.3.8.)
(7) Dismount two engagements and sheet guide 5.
(8) Dismount friction pad 6, compression spring S7, and separator guide 8.
(9) Dismount paper sensor E9.

3 - 21

1

<Dismount Inlet>

2

A

3

4

1

6

7

8

4

9

1

Screw driver

<Disconnecting Connector>

A

(-) Screw driver

4

Clamp lever

<Disconnecting Connector>

1

B

B

CN2

OKIPAGE 8p

3 - 22

1

<Dismount Inlet>

2

A

3

4

1

6

8

4

9

1

Screw driver

<Disconnecting Connector>

A

(-) Screw driver

4

Clamp lever

<Disconnecting Connector>

1

B

B

CN2

OKIPAGE 8w (EPROM type)

3 - 23

1

<Dismount Inlet>

2

A

3

4

1

6

8

4

9

1

Screw driver

<Disconnecting Connector>

A

(-) Screw driver

Clamp lever

<Disconnecting Connector>

1

B

B

CN2

OKIPAGE 8w (Mask CPU type)

3 - 24

3.3.14 Pulse Motor (Main)
(1) Dismount the upper cover assy. (See Section 3.3.5.)
(2) Dismount the high-voltage power supply board (P2H). (See Section 3.3.6.)
(3) Dismount side plate M. (See Section 3.3.9.)
(4) Dismount the base frame. (See Section 3.3.13.)
(5) Remove two screws 1 and dismount pulse motor (main) 2.

2

1

3 - 25

3.3.15 Hopping Shaft Assy
(1) Dismount the upper cover assy. (See Section 3.3.5.)
(2) Dismount the high-voltage power supply board (P2H). (See Section 3.3.6.)
(3) Dismount the base frame. (See Section 3.3.13.)
(4) Dismount the paper holder assy. (See Section 3.3.8.)
(5) Dismount the sheet guide. (See Section 3.3.13.)
(6) Dismount side plate M. (See Section 3.3.9.)
(7) Raise up roller holder 3, slide hopping shaft assy 1, and dismount roller holder 3 and

hopping roller 4. (Knock pin 5 also comes off at the same time. Take care not to lose it.)

(8) Draw out hopping shaft assy 1 to the right and dismount magnet H6.

2

4

3 - 26

3

5

1

6

3.3.16 Regist Roller
(1) Dismount the upper cover assy. (See Section 3.3.5.)
(2) Dismount Idle gear R 3 and Gear R 4.
(3) Move regist roller 1 to the right and dismount it by lifting. (Two regist bearings 2 also come

off at the same time. Take care not to lose them.)

1

3

2

2

4

3 - 27

3.3.17 Paper Sensor E, Paper Sensor Exit and Toner Sensor Assy
(1) Dismount the upper cover assy. (See Section 3.3.5.)
(2) Dismount the high-voltage power supply board (P2H). (See Section 3.3.6.)
(3) Dismount the base frame. (See Section 3.3.13.)
(4) Dismount the paper holder assy. (See Section 3.3.8.)
(5) Dismount the sheet guide. (See Section 3.3.13.)
(6) Dismount the heat assy. (See Section 3.3.10.)
(7) Dismount drive shaft E. (See Section 3.3.11.)
(8) Dismount paper sensor E1.
(9) Dismount paper sensor exit 2.
(10) Dismount toner sensor assy 3.

3

2

1

3 - 28

3.3.18 Base Plate
(1) Dismount the upper cover assy. (See Section 3.3.5.)
(2) Dismount the base frame. (See Section 3.3.13.)
(3) Remove two screws 1, disconnect connector 2, and dismount power supply unit 3.
(4) Dismount insulation sheet 4.
(5) Remove five screws 5, dismount insulation sheet 6 and dismount main control board 7.
(6) Dismount insulation sheet 8.
(7) Remove screw 9 , disconnect connector 0 and dismount High Voltage Power Supply Board

(P6L) A from base plate B.

(8) Dismount insulation sheet C.

1

3

4

5

5

1

8

5

2

5

6

5

7

B

OKIPAGE 8p

3 - 29

9

0

C

A

9

A

1

A

2

5

6

5

3

4

1

8

5

B

9

7

0

OKIPAGE 8w (EPROM type)

3 - 30

C

A

9

3

1

4

1

5

2

5

B

8

7

9

0

OKIPAGE 8w (Mask CPU type)

3 - 31

C

A

9

A

4. ADJUSTMENT

4. ADJUSTMENT

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

board. The printer driver 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 Printer Driver

(For Microsoft Windows)

This printer driver 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) Charge roller cleaning

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 “User’s Manual.”

4 - 1

4.1.2 Engine Maintenance Utility
See Appendix D.

4.2 Adjustment When Replacing a Part

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

Part to be Replaced Adjustment

LED head

EP unit Reset the drum counter. (Refer to "User's Manual".)

Main control board Upload or download EEPROM data.

4.2.1 Setting LED Head Drive Time

Caution:

When the liminous 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 Making 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

Set the LED head drive time.
Set the LED Head Width
Set the LED Head Wire
Set the Head type

Figure 4-2

4 - 2

Luminous intensity display

027

135

Character

This three digits indicate
the luminous intensity of the
LED head

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. (See Figure 4-4.)

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)

4 - 3

5. PERIODICAL MAINTENANCE

5. PERIODICAL MAINTENANCE

5.1 Periodical Replacement Parts

Table 5-1 lists the part and unit to be replaced periodically.

Table 5-1 Routine Replacement Parts

Part Name Replacement Time

Toner cartridge (Type 6)
EP unit (Type 6)

Caution:

Also reset the drum counter when replacing the I/D unit.

When "Toner Low" is displayed.
When "Change Drum" is displayed.

5.2 Cleaning

Remove any toner or dirt and clean the circumference and inside of the printer with a waste cloth.

Caution:

5.2.1 Cleaning the LED Lens Array
When a white belt or a white stripe (void, light printing) occurs in the vertical direction of the print

surface, clean the LED lens array or replace the toner cartridge.

Caution:

Do not touch the OPC drum, LED lens array, and connector block of the LED head.

Be sure to use an LED head cleaner to clean the LED lens array.

Part to be Checked

Simultaneously

LED head Consumables

Remarks

Consumables

White belt or stripe
(void, light printing)

Figure 5-1

5 - 1

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

cleaner left and right several time to clean the head.

Caution:

Do not press the LED head cleaner against the LED lens array.

LED lens array

LED head cleaner

Figure 5-2

5 - 2

6. TROUBLESHOOTING PROCEDURES

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 the OKIPAGE 8p/ 8w is displayed on the status monitor of the PC.
Take proper action according to the message displayed on the status monitor.

(2) LED display

The OKIPAGE 8p/8w is equipped with only one LED. This LED indicates one of the following
statuss:

OKIPAGE 8w LED Functions

Printer Status LED Indication
Ready Lighting
Printing in progress Blink (*1)
Recoverable alarm Blink (*2)
Unrecoverable alarm Blink (*3)

*1:
*2:

*3:

The LED blinks at a cycle of 1 second (0.5s ON)
from data reception to printing end.
The LED blinks at a cycle of 0.24 second (0.12s ON).
The LED blinks at a cycle of 0.24 second (0.12s ON).

6 - 1

LED Functions

OKIPAGE 8p

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

Ready
During suspending data pro-

cessing (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

Flash 2

Flash 2

OFF
OFF

OFF

Flash 2
OFF
Undefined

OFF

OFF

OFF

ON
Flash 1

Flash 2

Undefined
Undefined
Undefined

OFF

OFF

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.

6 - 2

6.5 Troubleshooting

If a trouble occurs in the OKIPAGE 8p/ 8w, 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.

6 - 3

Table 6-1

6 - 4

PJL

OP8w
OPEL

Code

00 10
00 20
10 00
10 01

10 02
12 20

14 2X
14 3X

Category Status Message Display Content Remedy

OP8p

Code

Normal status 18 00

Warming Up
Online (Ready)
Power Save Mode
Toner Low
Toner Sensor

Change Drum

10003
10001
10094
10006
10093

40093

Manual Paper In

Printing In Progress
Ejection In Progress

10098
10099

Manual Request
Executive
Letter
Legal 14
Legal 13
A6
A5
A4
B5
Monarch
COM-10
DL
C5
COM-9

16 01
16 02
16 03
16 04
16 18
16 19
16 1A
16 21
16 50
16 51
16 5A
16 5B
16 7F

Warming-up status
Online (ready) status
Power save status
The toner amount of the toner cartridge is small.
The I/D unit is not installed or the toner sensor is

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

faulty.
Life of I/D drum
The paper is in the manual feed mode.

X=0, Non Warning

Printing in progress
Ejection in progress

X=1, Toner Low
X=2, 3 Change Drum
X=0, Non Warning
X=1, Toner Low
X=2, 3 Change Drum

Request the paper to be set in the manual feed

Change the I/D Unit
Replace the I/D unit.

(

Note:

Normal operation
Normal operation
Set the requested paper in the manual feed mode.

mode.
The paper sizes are as follows:

Executive, Letter, Legal 14, Legal 13, A4, A5, A6,
B5, Monarch, DL, C5, COM-10, COM-9

Be sure to reset the drum counter after replacing the I/
D unit.)

Table 6-1 (Cont'd)

6 - 5

Category Status Message Display Content Remedy

Paper size error

Paper jam

Cover open

Buffer overflow

Paper Size Error

Paper Input Jam

Paper Feed Jam

Paper Exit Jam

ID Not Installed
Cover Open

Page Buffer Overflow

OP8p

PJL

Code

40077

40078

40079

40019
40021

30097

OP8w
OPEL

Code
30 00

31 00

32 00

33 00

42 00
4F 00

40 01

Paper of improper size was fed.

2.52" (64 mm) L 15.77" (400.56 mm)

A paper jam occurred when sheets of paper were
being supplied.

A paper jam occurred during paper feeding.

A paper jam occurred during paper ejection.

The upper cover is open.

The page buffer overflowed because there are a
large number of print data.

Check the paper. Also check whether more than one sheet of
paper were fed simultaneously. To release the error display,
open the cover, then close it. If this error occurs frequently, see
Section 6.5.2 3.

Check the paper. To release the error display, close the cover, then
close it. If this error occurs frequently, see Section 6.5.2 2-1.

Open the cover, then remove the jammed paper. To release the
error display, close the cover. If this error occurs frequently, see
Section 6.5.2 2-2.

Open the cover, then remove the jammed paper. To release the
error display, close the cover. If this error occurs frequently, see
Section 6.5.2 2-3.

Installed I/D Unit
To release the error display, close the cover. If this error occurs

frequently, replace the power supply board.
To release the error display, press the reset button on the status

motor of the printer driver. Install RAM or reduce the number of
print data.

Device configuration error

Print Over Run

Program ROM Check Error

Resident RAM Check Error

30017

40 10

A print overrun occurred because print data is
complicated.

60 10

An error occurred during program ROM check.

60 30

An error occurred during resident RAM check.

To release the error display, press the reset button on the status
motor of the printer driver. Simplify the print data format.

Replace program ROM or the main control board. (When
replacing the main control board, also adjust EEPROM data.)
(See Section 4.2.4.)

Replace the main control board. (When replacing the main
control board, also adjust EEPROM data.) (See Section 4.2.4.)

Table 6-1 (Cont'd)

6 - 6

Category Status Message Display Content Remedy

Category Status Message Display Content Remedy

Device configuration error

OP8p

OP8p

PJL

PJL

Code

Code

EEPROM Check Error

Option RAM Check Error

Fuser Error
Thermister Open Check Error
Thermister Short Check Error
Watch Dog Timeout Error

Motor Timeout Error

40084

OP8w

OP8w

OPEL

OPEL

Code

Code
60 40

60 60

60 80
60 91
60 92
60 C0

60F0

An error occurred during EEPROM check.

An error occurred during option RAM check.

A heater timeout error occurred.
The thermistor is open.
A thermistor short occurred.
A watchdog timeout occurred.

A motor timeout occurred.

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.
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.

6.5.2 Status Message Troubleshooting
Some failures cannot be corrected according to the status message trouble list. Troubleshoot

these failures according to the following troubleshooting flowcharts:

No.

1.

The OKIPAGE 8p/8w malfunctions after the power supply has been turned on.

2.

Jam error

Paper input jam
Paper feed jam
Paper exit jam

3. Paper size error

4. Fusing error

Caution:

When replacing the main control board troubleshooted according to the troubleshoot-

Item

ing flowcharts, also adjust EEPROM data. (See Section 4.2.4.)

Flowchart No.

1

-1

2

2

-2

2

-3

3

4

6 - 7

1 The OKIPAGE 8p/8w malfunctions after the power supply has been turned on.

• Turn the power supply off, then on again.

• Is the LED lamp on?

• No Is the AC cable connected correctly?

• No Connect the AC cable correctly.

• Yes Is +5 V supplied between CN1 Pin 7 and CN1 Pin 13 of the high-voltage power
supply board (P2H)?
(Pin 7: +5 V, Pin 13: 0 V)

• No Are the CN1 connectors of the high-voltage power supply board (P2H)

and main control board connected correctly?

• No Connect the CN1 connectors correctly.

• Yes Is +5 V supplied between CN2(OKIPAGE8w) or POWER(OKIPAGE8p)

Pin 2 and CN2(POWER) Pin 3 of the main control board?

(Pin 2: +5 V, Pin 3: 0 V)

• No Replace the high-voltage power supply board(P2H).

• Yes Replace the main control board.

• Yes Is 1-2 V voltage supplied between CN1 Pin 2 and CN1 Pin 13 of the high-voltage
power supply board(P2H)? (OKIPAGE 8w Only.)

• No Replace the main control board.

• Yes Replace the high-voltage power supply board(P2H).

• Yes Replace the main control board.

6 - 8

[JAM error]
2-1 Paper input jam

• Does a paper input jam occur when the power supply is turned on?

• Yes Is the jammed paper on paper sensor?

• Yes Remove the jammed paper.

• No Is paper sensor (manual feed/paper) operating normally?

• No Replace paper sensor (manual feed or paper).

• Yes Replace the high-voltage power supply board(P2H).

• No Does a paper input jam occur during paper loading?

• Yes Is the paper already fed to paper sensor (manual feed)?

• Yes Is paper sensor (manual feed) operating normally?

• No Replace paper sensor (manual feed).

• Yes Check the gear block or replace high-voltage power supply board(P2H).

• No Is the paper already fed to paper sensor (paper)?

• Yes Is paper sensor (paper) operating normally?

• No Replace paper sensor (paper).

• Yes Replace high-voltage power supply board(P2H).

• No Replace the stepping roller or friction pad.

• No Is the hopping roller rotating?

• Yes Check the coil resistance of magnet H. Is the resistance normal (about 120 Ω)?

• No Replace magnet H.

• Yes Is +26 V supplied between CN8(OKIPAGE8w) or PJ(OKIPAGE8p) Pin 1 and
CN8(PJ) Pin 2 of the main control board?

• No Replace the main control board.

• No Check the gear block or replace the hopping shaft assy.

• No Are the CN7(OKIPAGE8w) or MOTOR(OKIPAGE8p) connectors of the pulse motor
(main) and main control board connected?

• No Connect the CN7(MOTOR) connectors correctly.

• Yes Measure the resistance of the pulse motor (main). Is the resistance normal (about 3.8 Ω)?

• No Replace the pulse motor (main).

• Yes Replace the main control board.
6 - 9

[JAM error]
2-2 Paper feed jam

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

• Yes Is the jammed paper on paper sensor (paper/outlet)?

• Yes Remove the jammed paper.

• No Is paper sensor (outlet/paper) operating normally?

• No Replace paper sensor (outlet or paper).

• Yes Replace the high-voltage power supply board(P2H).

• No Has the paper arrived at paper sensor (paper)?

• No Is the feed roller rotating?

• No Check the gear block.

• Yes Is the I/D unit set correctly?

• No Set the I/D unit correctly.

• Yes Check the gear block.

• Yes Has the paper arrived at the paper sensor (outlet)?

• Yes Is the paper sensor (outlet) operating normally?

• No Replace the paper sensor (outlet).

• Yes Replace the high-voltage power supply board(P2H).

• No Check the gear block.

2-3 Paper exit jam

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

• Yes Is the jammed paper on the paper sensor (outlet)?

• Yes Remove the jammed paper.

• No Is the paper sensor (outlet) operating normally?

• No Replace the paper sensor (outlet).

• Yes Replace the high-voltage power supply board(P2H).

• No Check the gear block or replace the eject roller.

6 - 10

3 Paper size error

• Is the paper of the specified size being use?

• No Use paper of the specified size.

• Yes Is paper sensor (paper) operating normally?

• No Replace paper sensor (paper) or clean the inlet sensor on the high-voltage power
supply board(P2H).

• Yes Is the paper sensor (outlet) operating normally?

• No Replace the paper sensor (outlet) or clean the outlet sensor on the high-voltage
power supply board(P2H).

• Yes Replace the high-voltage power supply board(P2H).

Exit roller

Paper sensor (paper)

Toner
sensor
Assy

Paper sensor (manual feed)

Paper feeding direction

Paper sensor (outlet)

Heat roller

Transfer roller

Feed roller

Hopping

roller

6 - 11

4 Heat assy error

• Turn the power supply off, then on again.

• Does the Halogen lamp of the heat assy go on?

• No Is the Halogen lamp or thermostat disconnected?

• Yes Replace the heat assy.

• No Replace the power supply unit.

• Yes Are the CN2(OKIPAGE8w) or POWER(OKIPAGE8p) connectors of main control board
and the power supply unit connected correctly?

• No Connect the CN2(POWER) connectors correctly.

• Yes Replace the main control board.

6 - 12

6.5.3 Image Troubleshooting
This section explains how to troubleshoot when an image problem is output as a result of the

printing.
Figure 6-3 is an example of image problem output.

Symptom
An image is light or blurred entirely. (Figure 6-3, A )
Dark background density (Figure 6-3, B )
A blank paper is output. (Figure 6-3, C )
Vertical block belt/black stripe (Figure 6-3, D )
Cyclical defect (Figure 6-3, E )
Print void
Poor fusing (An image is blurred or peeled off when it is touched.)
Vertical white belt/white stripe (Figure 6-3, F )

Flowchart No.

1

2

3

4

5

6

7

8

A Light or blurred

images entirely

D Black vertical stripes E Cyclical defect F White vertical belts

B Dark background

density

C Blank paper

or streaks

Figure 6-3 Image Problems

6 - 13

1 An image is light or blurred entirely.

• Is the toner low? (Is "Toner Low" being displayed?)

• Yes Supply a toner.

• No Is the specified paper being used?

• No Use the specified paper.

• Yes Is the lens of the LED head dirty?

• Yes Clean the LED head.

• No Is the LED head installed correctly?
Check the HEAD1, HEAD2 connector of the main control board.

• No Install the LED head correctly.

• Yes Is the contact plate of the transfer roller in correct contact with the high-voltage power

supply board(P2H)? (See Figure 6-4 F .)

• Yes Is the terminal of the I/D unit in correct contact with the contact plate? (See Figure 6-

4 A and B )?

• No Contact the terminal correctly.

• Yes Replace the transfer roller.

• Has this error been recovered?

• Yes End

• No Replace the I/D unit.

• Has this error been recovered?

• Yes End

Caution:

• No Replace the main control board, high-voltage power supply board(P6L) or high-voltage

power supply board(P2H).

After replacing the I/D unit, reset the drum counter. (Refer to
"Replacing the Drum Cartridge" in "User's Manual".)

6 - 14

2 Dark background density

• Has the OPC drum being exposed to external light?

• Yes Set the OPC drum in the OKIPAGE 8p/8w and wait for about 30 minutes.

• No Is the heat roller of the heat assy dirty?

• Yes Clean the heat roller.

• No Is the terminal of the I/D unit in correct contact with the contact plate? (See Figure 6­4 D and Figure 6-5 D .)

• No Contact the terminal correctly.

• Yes Replace the I/D unit.

• Has this error been recovered?

• Yes End

Caution:

• No Replace the main control board, high-voltage power supply board(P2H) or high-voltage
power supply board(P6L).

3 A blank paper is output.

• Is the LED head connected correctly.

Check the HEAD1, HEAD2 connector of the main control board.

• No Connect the LED head correctly.

• Yes Is the terminal of the I/D unit in correct contact with the contact plate? (See Figure 6­5 E .)

• No Contact the terminal correctly.

• Yes Replace the LED head.

• Has this error been recovered?

• Yes End

After replacing the I/D unit, reset the drum counter. (Refer to
"Replacing the Drum Cartridge" in "User's Manual".)

Caution:

• No Replace the main control board, high-voltage power supply board(P2H) or high-voltage
power supply board(P6L).

Set the LED head drive time when replacing the LED head. (See
Section 4.2.1.)

6 - 15

4 Vertical black belt/stripe

• Replace the I/D unit.

• Has this error been recovered?

• Yes End

• No Replace the LED head.

• Has this error been recovered?

• Yes End

• No Replace the main control board, high-voltage power supply board(P2H) or high-voltage
power supply board(P6L).

5 Cyclic defect

EP drum
Developing roller 1.44" (36.6 mm) Replace the I/D unit.
Toner supply roller 2.63" (66.8 mm) Replace the I/D unit.

Caution:

Caution:

After replacing the I/D unit, reset the drum counter. (Refer to
"Replacing the Drum Cartridge" in "User's Manual".)

Set the LED head drive time when replacing the LED head. (See
Section 4.2.1.)

Cycle

1.98" (50.3 mm)

Clean or replace the I/D unit.

Remedy

Caution:

Charge roller 0.81" (20.6 mm) Replace the I/D unit.
Cleaning roller 0.81" (20.6 mm) Replace the I/D unit.
Transfer roller 1.71" (43.4 mm) Replace the I/D unit.
Heat roller 2.46" (62.5 mm) Replace the heater Assy.
Pressure roller B 2.35" (59.7 mm) Replace pressure roller B.

After replacing the I/D unit, reset the drum counter. (Refer to "Replacing the Drum
Cartridge" in "User's Manual".)

6 - 16

6 A blank paper is output.

• Is the contact plate of the transfer roller in correct contact with the high-voltage power supply
board?

• No Contact the contact plate of the transfer roller correctly.

• Yes Replace the transfer roller.

• Has this error been recovered?

• Yes End

• No Is the terminal of the I/D unit in correct contact with the contact plate? (See Figure 6-

4 A B C E and Figure 6-5 A B C D E .)

• No Contact the terminal of the I/D unit correctly.

• Yes Replace the I/D unit.

• Has this error been recovered?

• Yes End

Caution:

• No Is the LED head installed correctly?
Check the HEAD1, HEAD2 connector of the main control board.

• No Contact the LED head correctly.

• Yes Replace the LED head

• Has this error been recovered?

• Yes End

Caution:

• No Replace the main control board, high-voltage power supply board(P2H) or high-voltage
power supply board(P6L).

After replacing the I/D unit, reset he drum counter. (Refer to
"Rplacing the Drum Cartridge" in "Users Manual".)

Set the LED head drive time when replacing the LED head. (See Section

4.2.1.)

6 - 17

7 Poor fusing

• Is the specified paper being used?

• No Use the specified paper. (xerox 4200 (20 lbs))

• Yes Is the bias spring normal? (Tension: 3.25 kg)

• No Replace the bias spring.

• Yes Are the heater connector of the heat assy and the CN1 connector of the power supply
unit connected correctly.

• No Connect the connectors correctly.

• Yes Replace the heat assy.

• Has this error been recovered?

• Yes End

• No Replace the main control board or high-voltage power supply board(P2H).

6 - 18

8 Vertical white belt/stripe

• Is the lens of the LED head dirty?

• Yes Clean the LED head.

• No Is the contact plate of the transfer roller in correct contact with the high-voltage power
supply board(P2H)? (See Figure 6-4 E .)

• No Contact the contact plate of the transfer roller correctly.

• Yes Replace the transfer roller.

• Has this error been recovered?

• Yes End

• No Is the LED head installed correctly?

Check the HEAD1, HEAD2 connector of the main control board.

• No Install the LED head correctly.

• Yes Replace the LED head.

• Has this error been recovered?

• Yes End

Caution:

• Yes Replace the EP unit.

• Has this error been recovered?

• Yes End

Caution:

• No Replace the main control board, high-voltage power supply board(P2H) or high-voltage
power supply board(P6L).

Set the LED head drive time when replacing the LED head. (See
Section 4.2.1.)

After replacing the I/D unit, reset the drum counter. (Refer to
"Replacing the Drum Cartridge" in "User's Manual".)

6 - 19

Contents

A : Toner Supply Roller
B : Developing Roller
C : Charge Roller
D : Cleaning Roller
E : Transfer Roller
F : Heat Roller

F
C

E

B
A

D

Figure 6-4

6 - 20

Contents

A : Toner Supply Roller
B : Developing Roller
C : Charge Roller
D : Cleaning Roller
E : Ground (Drum)

C
D

B
A

E

Figure 6-5

6 - 21