Oki B410 User manual

Oki Data CONFIDENTIAL
B410/B420/B430/MPS420b
Maintenance Manual
080409B

Copyright © 2008 by Oki Data. All Rights Reserved
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Oki Data has taken care to insure that the information which follows is complete,
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Oki Data CONFIDENTIAL

43984801TH Rev.1/
Oki Data CONFIDENTIAL PREFACE
B410d B410dn B420dn B430d B430dn
Engine speed (letter/A4) 30/28 30/28 30/28 30/28 30/28
Resolution Max.
resolution 2400 x 600
dpi 2400 x 600 dpi 2400 x 600 dpi 1200 x 1200 dpi 1200 x 1200 dpi dp
Emulation Standard PCL6/SIDM PCL6/SIDM PCL6/SIDM PCL6/PS3/
SIDM PCL6/PS3/ SIDM PCL6/PS3/ SIDM
Option N/A N/A N/A N/A N/A N/A
Operation
panel
LCD
display 16 character x
2 16 character x 2 16 character x 2 16 character x 2 16 character x 2 16 character x 2
Switch 1 (online/
offline) 1 (online/ offline) 6666
LED lights 222222
Input tray (Manual/Auto) Single sheet
manual feed Single sheet manual feed
50 sheets
Multi Purpose
Feeder
50 sheets
Multi Purpose
Feeder
50 sheets
Multi Purpose
Feeder
50 sheets
Multi Purpose
Feeder
Input tray (1st bin) 250 sheets 250 sheets 530 sheets 250 sheets 250 sheets 530 sheets
Maximum Input capacity 781 781 1110 830 830 1110
Interface USB 2.0
Parallel
Ethernet N/A N/A
Auto Duplex Standard Standard Standard Standard Standard Standard
Monthly Duty
Cycle Maximum 50,000 pages 50,000 pages 70,000 pages 70,000 pages 70,000 pages 70,000 pages
Toner life@ISO19752 3,500 3,500 (7,000
available for
JPN only)
3,500/7,000/
10,000 3,500/7,000 3,500/7,000 3,500/7,000/ 10,000
Dimensions
(inch./mm)
Width 14.5”/369mm 14.5”/369mm 14.5”/369mm 14.5”/369mm 14.5”/369mm
Depth 15.6"/395mm 15.6"/395mm 15.6"/395mm 15.6"/395mm 15.6"/395mm
Height 10.6"/268mm 10.6"/268mm 11.7"/297mm 10.6"/268mm 10.6"/268mm
Sales
Territories
ODA 100v N/
ODA 200v N/A
OEL N/A
AOS 1byte N/A
AOS 2byte N/A
Japan N/A N/A N/A
China TBD TBD TBD TBD TBD
PREFACE
This Maintenance Manual describes the maintenance methods in the printer field for the maintenance
personnel. In addition, regarding the handling and operating method of the printer, please refer to the "User’
s Manual".
The differences between various types of printers described in this Maintenance Manual are as follows.
Note! • It is prohibited to reprint entire or partial of the content without prior consent.
• For the reason of printer improving and manual content revising, the content of this
maintenance manual may change without any warning in the future.

43984801TH Rev.1/
Oki Data CONFIDENTIAL Contents
1. CONFIGURATION........................................................................................................7
1.1 System Configuration ............................................................................................................................7
1.2 Printer Configuration ..............................................................................................................................8
1.3 Optional Configuration..........................................................................................................................11
1.4 Specification.........................................................................................................................................12
1.5 Printing display.....................................................................................................................................15
1.5.1 VCCI label, Serial No.label............................................................................................................15
1.5.2 Warning label..................................................................................................................................15
1.5.3 Warning / Caution display...............................................................................................................16
2. Operational explanation .............................................................................................17
2.1 Electrophotographic process mechanism ............................................................................................17
2.2 Printing process....................................................................................................................................24
2.3 Toner entrance detection......................................................................................................................28
3. Parts replacement......................................................................................................30
3.1 Preparation for parts replacement........................................................................................................30
3.2 Parts layout...........................................................................................................................................32
3.3 Parts replacement method ...................................................................................................................37
3.3.1 LED Head.......................................................................................................................................38
3.3.2 Roller-Transfer................................................................................................................................39
3.3.3 Cover-Side-R..................................................................................................................................40
3.3.4 Cover-Side-L ..................................................................................................................................41
3.3.5 CU Board........................................................................................................................................42
3.3.6 Motor-DC-Main ..............................................................................................................................43
3.3.7 OPE Cover-Assy ............................................................................................................................44
3.3.8 Ope-Board......................................................................................................................................45
3.3.9 MPT-Assy (In case of B410dn, it is Manual-Assy)..........................................................................46
3.3.10 Front-Guide-Assy .........................................................................................................................47
3.3.11 Roller-Assy-Feed..........................................................................................................................48
3.3.12 Guide-Paper-Duplex.....................................................................................................................49
3.3.13 Stacker-Cover-Assy......................................................................................................................50
3.3.14 Fuser-Assy...................................................................................................................................51
3.3.15 Rear-Cover-Assy..........................................................................................................................53
3.3.16 Frame-Assy-Lower .......................................................................................................................54
3.3.17 High voltage / Low voltage power board.......................................................................................56
3.3.18 Plate-Bracket-Motor......................................................................................................................57
3.3.19 Roller-Back up..............................................................................................................................58
3.3.20 Roller-Resist.................................................................................................................................59
3.3.21 Lever-In-Sensor............................................................................................................................60
3.2.22 Lever-Eject-Sensor/Photo-Interrupter...........................................................................................61
3.3.23 Lever-End/Lever-Duplex/Lever-Cassette/Gear-Assy-Clatch ........................................................62
3.3.24 Paper feeding roller (Roller-Pick-Up,Roller-Feed-NOW,Roller-Assy-MPT) ..................................64
Contents

43984801TH Rev.1/
Oki Data CONFIDENTIAL Contents
4. ADJUSTMENT...........................................................................................................66
4.1 Category and function of maintenance mode.......................................................................................66
4.4.1 User maintenance mode (Administrator Menu) .............................................................................66
4.1.2 System maintenance mode (System maintenance menu).............................................................71
4.1.3 Engine maintenance mode.............................................................................................................76
4.1.4 Environment mode setting..............................................................................................................84
4.1.5 EEPROM Initialization....................................................................................................................85
4.2 Adjustment at part replacement ...........................................................................................................86
4.2.1 EEPROM data upload / download method.....................................................................................86
5. Periodic Maintenance.................................................................................................87
5.1 Periodic Replacement Parts.................................................................................................................87
5.2 Cleaning...............................................................................................................................................87
5.2.1 Cleaning of LED lens array.............................................................................................................87
5.2.2 Cleaning Page Function.................................................................................................................89
6. Procedures for Repairing ...........................................................................................90
6.1 Troubleshooting ....................................................................................................................................90
6.2 Points to be checked before modifying printing problems.....................................................................90
6.3 Points to be checked when the printing problems are modified ...........................................................90
6.4 Preparation for Troubleshooting............................................................................................................90
6.5 Troubleshooting Flow............................................................................................................................91
6.5.1 LCD Status Message/ TroubleTable...............................................................................................91
6.5.2 LCD Message Troubleshooting.....................................................................................................103
6.5.3 Print Troubleshooting....................................................................................................................111
7. Connection Diagram.................................................................................................119
7.1 Connection diagram...........................................................................................................................119
7.2 Board Layout......................................................................................................................................120
7.3 Resistance value................................................................................................................................134
Appendix A Centronics Parallel Interface.....................................................................136
Appendix B USB Interface ...........................................................................................143
Appendix C Maintenance Manual for Second Tray unit................................................145
1 Overview................................................................................................................................................145
1.1 Function...........................................................................................................................................145
1.2 Exterior and Parts Name.................................................................................................................145
2. Description for Operation of Second Tray unit......................................................................................146
3. Part Replacement.................................................................................................................................147
3.1 Precautions on replacing parts........................................................................................................147
3.2 Arrangement of Parts ......................................................................................................................148
3.3 How to Replace Parts......................................................................................................................149
3.3.1 Roller-Pick-Up, Roller-Feed-Now .............................................................................................150
3.3.2 Guard-Connector. Connector (9715S-08Z02-G4C)..................................................................151
3.3.3 Roller-Feed...............................................................................................................................152
3.3.4 Board-OT7................................................................................................................................153

43984801TH Rev.1/
Oki Data CONFIDENTIAL Contents
3.3.5 CONN Cord-AMP8P-AMP8P...................................................................................................154
3.3.6 Gear-Assy-Clatch.....................................................................................................................155
3.3.7 Frame-Assy-Retard, Spring-Retard..........................................................................................157
4. Cleaning of Paper Feed Roller and Separation Roller..........................................................................158
5. Procedure for Troubleshooting..............................................................................................................159
5.1 Precautions for Troubleshooting......................................................................................................159
5.2 Preparation before Troubleshooting.................................................................................................159
5.3 Troubleshooting Method ..................................................................................................................160
5.3.1 LCD Status Message List.........................................................................................................161
6. Connection Diagram.............................................................................................................................163
6.1 Connection diagram........................................................................................................................163
6.2 Board Arrangement.........................................................................................................................163
Appendix D Network Interface .....................................................................................165

43984801TH Rev.1 7 /
Oki Data CONFIDENTIAL 1. CONFIGURATION
1. CONFIGURATION
1.1 System Configuration
As the diagram 1.1 shows, for the standard configuration printer is configured by controller unit and
engine unit.
Operator panel board
LCD:1, LED:2, SW:1(B410d/B410dn)
LCD:1, LED:2, SW:6
(B420dn/B430d/B430dn)
LED head
CENTRONICS
Main print circuit board
USB 2.0 LAN
(10BASE-T/100BASE-TX)
Toner cartridge
Image drum cartridge
High voltage power supply uint Low voltage
power supply unit Fuser unit
Main DC Motor
2nd tray unit*
Hopping clutch (1st)
Register clutch
Hopping clutch (MPT)
Solenoid for paper inverting
Cassette & Duplex detecting
Paper end sensor
Exit sensor
Rear cover open sensor
Halogen lamp
FUSE
Temperature sensor
FAN Stacker cover open SW Transfer roller
AC inlet AC-SW
Tag board
Tag transit board 1
Tag transit board 2 Tag transit board 3
IN
sensor WRT
sensor Toner inlet
sensor
Figure1-1

43984801TH Rev.1 8 /
Oki Data CONFIDENTIAL 1. CONFIGURATION
A
A
A’
Paper cassette
Toner cartridge High voltage
power board
Low voltage
power board
Image drum cartridge
A’
Stacker-Cover-Assy
Cover-Side-R
Cover-Side-L
Plate-Base-PCB
Plate-Assy-Base
Motor-Fan
Duplex
Rear-Cover-Assy Fuser-Assy
OPE Cover-Assy
Guide-Paper-Duplex
Guide-Paper-R
Manual-Assy
Front-Guide-Assy
CU board
1.2 Printer Configuration
The printer main unit includes the following hardware parts.
• Electrophotographic processing part
• Paper feeding part
• Controller
• Operational part
• Power supply unit
Figure1-2
B410d/B410dn
Note! •Fuser-Assy has to be replaced by Assy unit.
• It is forbidden to disassemble Fuser-Assy or reuse the disassembled Fuser-Assy.
The configuration of printer main unit is shown as diagram 1-2~1-4

43984801TH Rev.1 9 /
Oki Data CONFIDENTIAL 1. CONFIGURATION
A
A
A’
A’
Stacker-Cover-Assy
Cover-Side-R
Cover-Side-L
Plate-Base-PCB
Plate-Assy-Base
Motor-Fan
Duplex
Rear-Cover-Assy Fuser-Assy
OPE Cover-Assy
Guide-Paper-Duplex
Guide-Paper-R
MPT-Assy
Front-Guide-Assy
CU board
Paper cassette
Toner cartridge High voltage
power board
Low voltage
power board
Image drum cartridge
B430d/B430dn
Figure1-3

43984801TH Rev.1 10 /
Oki Data CONFIDENTIAL 1. CONFIGURATION
A
A
A’
A’
Stacker-Cover-Assy
Cover-Side-R
Cover-Side-L
Plate-Base-PCB
Plate-Assy-Base
Motor-Fan
Duplex
Rear-Cover-Assy Fuser-Assy
OPE Cover-Assy
Guide-Paper-Duplex
Guide-Paper-R
MPT-Assy
Front-Guide-Assy
CU board
Paper cassette
Toner cartridge High voltage
power board
Low voltage
power board
Image drum cartridge
Figure1-4
B420dn

43984801TH Rev.1 11 /
Oki Data CONFIDENTIAL 1. CONFIGURATION
1.3 Optional Configuration
The options attached to the printer are as follows. These options can be ordered respectively for the
printer main unit.
(1) Second tray unit
(2) Additionally installed memory (Domestic oriented printer only use 128MB.)

43984801TH Rev.1 12 /
Oki Data CONFIDENTIAL 1. CONFIGURATION
1.4 Specification
(1) Type Desktop
(2) Dimension 268mm (Height) x 369mm (Width) x 395 (Depth)
:B410d/B410dn/B430dn
297mm (Height) x 369mm (Width) x 395mm (Depth)
:B420dn
(3) Weight Approx. 10.6kg ( Including printer main unit & consumables.
Options, Feeding quantity of paper are excluded.)
(4) Development method Dray type – Element developing method
Exposure method LED Head method
(5) Paper type, thickness, Size
Recommended paper Normal paper………….Excellent white A4
OHP Sheet…………….Sumitomo 3M CG3300
Label paper…………….Kokuyo LBP-A693
Category Size unit: mm (inch) Thickness
Normal Paper
A4 Weight 55~105kg(64~120g/m2)
For double-side printing, weight55~90kg
(64~105g/m2)
Tray 1, Width 100~215.9, Length 210~355.6
Tray 2, Width 148~215.9, Length 210~355.6
A5
A6
B5
Letter
Legal
Legal
Statement
Executive
Custom Width86~215.9
Length 140~355.6
Postcard Postcard Postcard
Return Postcard
Envelope
Envelope 1 (Chou #3) The envelope should be using 85g/m paper. The
flap of the envelope Chou type should not be with
fold, the flap of the envelope you should be clearly
folded.
Envelope 2 (Chou #4)
Envelope 3 (You #4)
The envelope should be using 24 lb. paper and
the flap part of it should be clearly folded.
Custom Width86~215.9
Length 140~355.6
Label Paper Letter
OHP Sheet Letter
Partial Printing
Paper Weight 55~105kg(64~120g/m2)
Paper for Color
Printing Weight 55~105kg(64~120g/m2)

43984801TH Rev.1 13 /
Oki Data CONFIDENTIAL 1. CONFIGURATION
(6) Paper feeding method / Ejecting method
*1: Multipurpose tray can be used for B420dn/B430dn.
*2: Face-up paper ejecting is not available at automatic double-side printing.
*3: Tray 1 is as width 100~21539mm, length 210~355.6mm. Tray 2 is as width 148~215.99mm, length 210~355.6mm.
*4: Tray 2 (The second tray unit) is for option.
*5: In case to set up the paper size for A5, A6, Postcard, Envelope, if the width of B5, Executive, Statement, Normal paper is less
than 200mm, also if thick paper or thicker paper has been set up for the paper thickness, the printing speed changes to be
slowly.
*6: • Envelope CHOU should be made by the paper or basis weight of 85g/m2and without any fold on the flap part.
• Envelope YOU should be made by the paper of basis weight of 85g/m2and with clear fold on the flap part.
• Com-9, Com-10, Monarch, C5, C6, and DL should be the envelope using 24lb paper and with clear fold on the flap part.
○ : It is possible to use it.
× : It is not possible to use it.
△ : It is possible to use it by a part of size
Type Size Thickness
(Weight:Kg)
Paper
feeding Method
Paper
ejecting
method Double-side print
Paper
cassette
Multipurpose
tray *1Manual Face up Face
down
Automatic
double-side print *2Manual
double-side print
Tray 1 Tray 2
*4Tray 1 Tray 2
*4Multipurpose
tray*1Manual Tray 1 Tray 2 *4Multipurpose
tray *1Manual
Normal
paper
A5 *5
B5 *5
Executive *5
Weight
55~105kg
Statement *5Weight
55~105kg
A4
Letter
Legal (13 inch)
Lega (14 inch)
Weight
55~90kg
Weight
91~105kg
A6 *5Weight
55~105kg
Custom *3*5
Width 86~215.9mm
Length
140~355.6mm
Weight
55~90kg
Weight
91~105kg
Postcard
*5Postcard/
Return postcard
Postcard
or less
than
weight
135kg
Envelope
*5
Envelope1 (CHOU
3)
Envelope2 (CHOU
4)
Envelope3 (YOU 4)
Com-9
Com-10
DL
C5
C6
Monarch
*6
Custom
Width 86~215.9mm
Length
140~355.6mm
*6
Label
paper A4/Letter 0.1~
0.5mm
OHP A4/Letter 0.1~
0.5mm
(7) Printing speed Continuous printing : Maximum 28 piece/second (A4, At copy mode, First try)
For Envelope • Postcard, if to enhance the printing quality, the
printing speed changes to be decreased.
For the resolution degree of 600 x 2400, if to enhance the
printing quality, the printing speed changes to be decreased.
Warm up time : Approx. 25 second (25°C, 100V)

43984801TH Rev.1 14 /
Oki Data CONFIDENTIAL 1. CONFIGURATION
(8) Paper feeding method Automatic feeding
(9) Paper ejecting method Face down (Rear ejecting) / Face up (Front ejecting)
(10) Resolution (Max.) 2400 × 600 dots / inch (B410d/B410dn/B420dn)
1200 × 1200 dots / inch (B430d/B430dn)
(11) Input electricity AC100V ± 10V, 50/60Hz ± 1Hz(B410dn/B430dn)
(12) Electricity consumption Up and running: Maximum 800W, Average 450W (25°C)
Ready and waiting: Average 70W (25°C)
Power-saving mode: (Without option) Under 6W
(With option) Maximum 7W
(13)Temperature and Humidity
(14) Operating noise In Printing : Rage A based on JIS Z9831, Average below 53dBA for SLOW.
Ready and waiting : Rage A based on JIS Z9831, Average below 53dBA for SLOW.
At power save : No sound (Background level)
(15) Consumables Toner cartridge : Approx. 3,500 piece /Approx. 7,000 piece/Approx. 10,000
piece(A4 ISO/IEC 19752 Continuous printing as
printing paten. But, except the 1st Toner cartridge)
Image drum : Approx. 25,000 piece (Continuously single-side printing of A4)
Cartridge : Approx. 20,000 piece (Single-side 3 pages/job) At Power save off.
Approx. 12,000 piece (Single-side 1 page/job) At Power save off.
Approx. 7,000 piece (Single-side 1 page/job) At Power save on
(Minimum value).
10
28
32
Temperature (°C)
20 80 Relative humidity (%)
Up and running
Tenperature Humidity
Up and
running 10~32 20~80%RH (Relative Humidity) No condensation.
However, Maximum temperature of wet ball should
be 25°C.
Power switch
off 0~43 10~90%RH (Relative Temperature) No
condensation. However, Maximum temperature of
wet ball should be 26.8°C.
Keeping -10~43 10~90%RH (Relative Humidity) No condensation.
However, Maximum temperature of wet ball should
be 26.8°C.

43984801TH Rev.1 15 /
Oki Data CONFIDENTIAL 1. CONFIGURATION
1.5 Printing display
1.5.1 VCCI label, Serial No. label
The VCCI label and Serial No. label have been attached on the specified part of printer as shows
below.
1.5.2 Warning label
Warning label has been attached on the part of printer that may cause injury to the operator.
Maintenance must be performed following the indication of the warning label.
Serial No.
Made In China
B430dn
B410dn

43984801TH Rev.1 16 /
Oki Data CONFIDENTIAL 1. CONFIGURATION
1.5.3 Warning / Caution display
The following warning / caution are displayed on the electrical power / sensor board.
Note! •There is a risk of electric shock in the middle of the heat sink and transformer. Be sure to check
before touch it.
• It may happen that the electricity has still left on the electrical circuit even after the fuse opened.
Low voltage power board
Warning / Caution content record
Heat sink
Transformer
High voltage power board

43984801TH Rev.1 17 /
Oki Data CONFIDENTIAL 2. Operational explanation
2. Operational explanation
2.1 Electrophotographic process mechanism
(1) Electrophotographic process
The following describes the overview of electrophotographic process.
1. Charging
Equally charge the surface of image drum by applying negative voltage to the charged roller due to
negative charge.
2. Exposure
The light from LED Head is exposed on the negative-charged surface of image drum. The surface
electrical potential of the exposed part of image drum surface becomes lower. Then forms electrostatic
latent image.
3. Development
Negative-charged toner is attracted to the electrostatic latent image due to electrostatic while touching
the image drum. Then forms viewable image.
4. Transfer
Overlap paper on the surface of OPC drum, from the backside of paper transfer toner image to the
paper by applying electrical charge by transfer roller.
5. Drum cleaning
The remaining toner on the image drum that is not transferred is made to be equable by cleaning roller.
And is temporarily attracted to the cleaning roller due to electrostatic.
6. Fusing
The toner image that is transferred to paper is fused on paper by heat and pressure.

43984801TH Rev.1 18 /
Oki Data CONFIDENTIAL 2. Operational explanation
1. Charging
Charge the image drum surface by applying voltage to the charged roller that contacts the image drum
surface.
Image drum
Charged roller
Power
2. Exposure
The light emitting from the LED Head will be exposed to the negative charged image drum. When the
surface electric potential of exposed part of the image drum goes to decrease, the electrostatic latent
image complying with image signal is formed.
Image drum is coated by basic layer (UL),charge generating layer (CGL), charge transferring layer (CTL)
on the basic material aluminum. The thickness of the organic light sensor (OPC) that is consisted by
CTL and CGL is approximate 20µm.
Charged roller
LED head LED head
Image drum Image drum
Paper
Power

43984801TH Rev.1 19 /
Oki Data CONFIDENTIAL 2. Operational explanation
3. Image development
Toner is attracted to the electrostatic latent image on the image drum surface, then the electrostatic
latent image changes to toner image.
1 As the roller on the supply spot of toner rotates while scrubbing the image-developing roller,
fiction electricity occurs between the image developing roller and toner; toner is attracted to
the image-developing roller.
Image drum
Charged roller Image developing plate
Toner supply roller
Image
developing
roller
2. The toner that has been attracted to the image-developing roller is dropped down to the
developing plate to make a thin toner film on the image developing roller side.
3 The toner is attracted by the exposed part (Low electrical potential part) of the image drum
when the image drum contact the image developing roller, so as to see the electrostatic latent
image.

43984801TH Rev.1 20 /
Oki Data CONFIDENTIAL 2. Operational explanation
Note! The necessary bypass voltage in image processing is impressed on the toner feeding roller
and image developing roller as show below.
Image drum
Basic material
Toner feeding roller
While the cover is closed it will be
connected and bias will be applied.
Image developing roller