Oki PAGE 6ex User Manual
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.
CONTENTS
>>>>>
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. 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)
<Thickness>
– 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
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)
M
M
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
AC
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
or
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)
M
M
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
AC
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.
ON: Paper exists.
OFF: No paper exists.
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
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
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