Brother HL-P2000, MFC-P2000 Service Manual

© Copyright Brother 1998
All rights reserved.
No part of this publication may be reproduced in any form or by any means without permission in
writing from the publisher.
Specifications are subject to change without notice.

Trademarks:
The brother logo is a registered trademark of Brother Industries, Ltd.

Apple, the Apple Logo, and Macintosh are trademarks, registered in the United States and other
countries, and True Type is a trademark of Apple computer, Inc.
Epson is a registered trademark and FX-80 and FX-850 are trademarks of Seiko Epson
Corporation.
Hewlett Packard is a registered trademark and HP Laser Jet is a trademark of Hewlett Packard
Company.
IBM, IBM PC and Proprinter are registered trademarks of International Business Machines
Corporation.
Microsoft and MS-DOS are registered trademarks of Microsoft Corporation.
Windows is a registered trademark of Microsoft Corporation in the U.S. and other countries.

PREFACE

This service manual contains basic information required for after-sales service of the laser printer
(hereinafter referred to as "this machine" or "the printer"). This information is vital to the service
technician to maintain the high printing quality and performance of the printer.

This service manual covers the MFC-P2000 / HL-P2000 printer.
This manual consists of the following chapters:

CHAPTER I : FEATURES AND SPECIFICATIONS

Features, specifications, etc.

CHAPTER II : THEORY OF OPERATION

Basic operation of the mechanical system, the electrical system and the electrical
circuits and their timing information.

CHAPTER III : DISASSEMBLY AND REASSEMBLY

Procedures for disassembling and reassembling the mechanical system.

CHAPTER IV : MAINTENANCE AND TROUBLESHOOTING

Reference values and adjustments, troubleshooting image defects, troubleshooting
malfunctions, etc.

APPENDICES :

Information in this manual is subject to change due to improvement or redesign of the product. All
relevant information in such cases will be supplied in service information bulletins (Technical
Information).

A thorough understanding of this printer, based on information in this service manual and service
information bulletins, is required for maintaining its print quality performance and for improving the
practical ability to find the cause of problems.

SERIAL NO. DESCRIPTIONS, DRUM LIFE & PAGE COUNTER, DIAMETER /
CIRCUMFERENCE OF ROLLERS, CONNECTION DIAGRAMS, PCB CIRCUIT
DIAGRAMS, ETC.

CONTENTS

CHAPTER I FEATURES AND SPECIFICATIONS .............................................I-1

1. FEATURES .........................................................................................................................I-1

2. PRINTER OVERVIEW.........................................................................................................I-3

3. SPECIFICATIONS...............................................................................................................I-4

3.1 Printing...........................................................................................................................................I-4

3.2 Scanning........................................................................................................................................I-4

3.3 Copying..........................................................................................................................................I-4

3.4 Functions........................................................................................................................................I-5

3.5 Electrical and Mechanical ..............................................................................................................I-5

3.6 Paper Loading................................................................................................................................I-6

3.7 Print Delivery..................................................................................................................................I-6

3.8 Print Paper.....................................................................................................................................I-7

3.9 Printing Area ..................................................................................................................................I-8

3.10 Document Loading.....................................................................................................................I-10

3.11 Document Delivery.....................................................................................................................I-10

4. SAFETY INFORMATION...................................................................................................I-11

4.1 Laser Safety (110 - 120V Model only)..........................................................................................I-11

4.2 FDA Regulations (110 - 120V Model only)...................................................................................I-11

4.3 IEC 825 (220-240V model only)...................................................................................................I-12

4.4 Additional Information...................................................................................................................I-13

4.5 Caution for Laser Product (Warnhinweis für Laserdrucker).........................................................I-13

CHAPTER II THEORY OF OPERATION........................................................ II-1

1. ELECTRONICS.................................................................................................................. II-1

1.1 General Block Diagram.............................................................................................................II-1

1.2 Main PCB Block Diagram .........................................................................................................II-2

1.3 Main PCB..................................................................................................................................II-3

1.3.1 CPU Core....................................................................................................................II-3

1.3.2 ASIC............................................................................................................................II-3

1.3.3 ROM............................................................................................................................II-6

1.3.4 DRAM..........................................................................................................................II-6

1.3.5 EEPROM.....................................................................................................................II-7

1.3.6 Reset Circuit................................................................................................................II-7

1.3.7 CDCC I/O ....................................................................................................................II-7

1.3.8 Engine I/O....................................................................................................................II-8

1.3.9 Paper Feed Motor Drive Circuit...................................................................................II-9

1.3.10 Document Scanner Circuit.........................................................................................II-10

1.3.11 Scanner Panel I/F......................................................................................................II-10

1.3.12 Scanner Motor Drive Circuit ......................................................................................II-11

1.3.13 CIS Drive Circuit........................................................................................................II-11

1.4 Panel Sensor PCB..................................................................................................................II-11

i

1.5 Scanner Sensor PCB / Scanner Panel PCB...........................................................................II-11

1.6 Power Supply..........................................................................................................................II-12

1.6.1 Low-voltage Power Supply........................................................................................II-12

1.6.2 High-voltage Power Supply.......................................................................................II-13

2. MECHANICS....................................................................................................................II-14

2.1 General Overview of Mechanism............................................................................................II-14

2.2 Printer Mechanism..................................................................................................................II-15

2.2.1 Paper Transfer...........................................................................................................II-15

2.2.2 Sensors .....................................................................................................................II-17

2.2.3 Drum Unit ..................................................................................................................II-18

2.2.4 Print Process.............................................................................................................II-18

2.3 Scanner Mechanism...............................................................................................................II-22

2.3.1 Document Transfer (Feed and Eject)........................................................................II-22

2.3.2 Scanner.....................................................................................................................II-22

CHAPTER III DISASSEMBLY AND REASSEMBLY.......................................III-1

1. SAFETY PRECAUTIONS..................................................................................................III-1

2. DISASSEMBLY FLOW......................................................................................................III-2

3. DISASSEMBLY PROCEDURE .........................................................................................III-3

3.1 Drum Unit.................................................................................................................................III-3

3.2 Output Tray ASSY ...................................................................................................................III-3

3.3 Top Cover................................................................................................................................III-4

3.4 Scanner Control Panel ASSY..................................................................................................III-5

3.5 Document Scanner Frame ASSY............................................................................................III-8

3.6 Scanner Rear Cover ASSY / Rear Cover ASSY ...................................................................III-12

3.7 MP Rear Sheet Feeder ASSY ...............................................................................................III-13

3.8 Fixing Unit..............................................................................................................................III-14

3.9 Laser Unit...............................................................................................................................III-17

3.10 Main PCB ASSY ....................................................................................................................III-18

3.11 Base Plate ASSY...................................................................................................................III-19

3.12 Panel Sensor PCB ASSY ......................................................................................................III-20

3.13 Low-voltage Power Supply PCB ASSY .................................................................................III-21

3.14 High-voltage Power Supply PCB ASSY.................................................................................III-22

3.15 Sub Fan Motor ASSY ............................................................................................................III-23

3.16 Main Fan Motor ASSY ..........................................................................................................III-23

3.17 Drive Unit ...............................................................................................................................III-24

3.18 Main Motor ASSY ..................................................................................................................III-25

3.19 Sub Motor ASSY....................................................................................................................III-25

3.20 Document Support / Paper Support.......................................................................................III-26

3.21 Extension Support Wire .........................................................................................................III-27

3.22 Document Extension Support Wire........................................................................................III-27

4. PACKING........................................................................................................................III-28

ii

CHAPTER IV MAINTENANCE AND TROUBLESHOOTING ......................... IV-1

1. INTRODUCTION.............................................................................................................. IV-1

1.1 Initial Check ............................................................................................................................ IV-1

1.2 Basic Procedure ..................................................................................................................... IV-2

2. MTBF / MTTR ..................................................................................................................IV-2

3. CONSUMABLE PARTS ...................................................................................................IV-3

3.1 Drum Unit................................................................................................................................ IV-3

3.2 Toner Cartridge....................................................................................................................... IV-3

3.3 Periodical Replacement Parts................................................................................................. IV-3

4. IMAGE DEFECTS............................................................................................................ IV-4

4.1 Image Defect Examples.......................................................................................................... IV-4

4.2 Troubleshooting Image Defects.............................................................................................. IV-5

4.3 Location of High-voltage Contacts and Grounding Contacts................................................ IV-22

4.4 Location of Feed Roller Shaft and Grounding Contacts....................................................... IV-23

5. DOCUMENT FEEDING PROBLEMS............................................................................. IV-24

6. PAPER JAM................................................................................................................... IV-26

7. TROUBLESHOOTING MALFUNCTIONS ...................................................................... IV-27

8. PRINTER INSPECTION MODE..................................................................................... IV-32

8.1 Incorporated Inspection Modes ............................................................................................ IV-32

8.2 Error Codes .......................................................................................................................... IV-34

9. SCANNER INSPECTION MODE ................................................................................... IV-35

9.1 Test Mode A.......................................................................................................................... IV-35

9.2 Test Mode B.......................................................................................................................... IV-37

9.3 Scanner Error Indications..................................................................................................... IV-38

9.4 Scanner Service Error .......................................................................................................... IV-40

APPENDICES

1. SERIAL NO. DESCRIPTIONS .......................................................................................... A-1

2. HOW TO KNOW DRUM UNIT LIFE & PAGE COUNTER ................................................A-2

3. DIAMETER / CIRCUMFERENCE OF ROLLERS.............................................................. A-4

4. CONNECTION DIAGRAM.................................................................................................A-5

5. MAIN PCB CIRCUIT DIAGRAM, (1/3)............................................................................... A-6

6. MAIN PCB CIRCUIT DIAGRAM, (2/3)............................................................................... A-7

7. MAIN PCB CIRCUIT DIAGRAM, (3/3)............................................................................... A-8

8. PANEL SENSOR PCB CIRCUIT DIAGRAM .....................................................................A-9

9. SCANNER PANEL PCB CIRCUIT DIAGRAM.................................................................A-10

10.SCANNER SENSOR PCB CIRCUIT DIAGRAM.............................................................. A-11

11.LOW-VOLTAGE POWER SUPPLY PCB CIRCUIT DIAGRAM, (110 - 120V).................. A-12

12.LOW-VOLTAGE POWER SUPPLY PCB CIRCUIT DIAGRAM, (220 - 240V).................. A-13

13.HIGH-VOLTAGE POWER SUPPLY PCB CIRCUIT DIAGRAM....................................... A-14

iii

CHAPTER I FEATURES AND SPECIFICATIONS

1. FEATURES

This printer has the following features:

Three Functions in One Printer

This printer provides two additional functions, copying and scanning besides the printing
function. You no longer need a lot of peripherals and can save space in your office. This
is helpful especially for SOHO users.

High Resolution and Fast Printing Speed

True 600 dots per inch (dpi) with microfine toner and 10 pages per minute (ppm) printing
speed (A4 or Letter paper).

Enhanced Printing Performance and User-Friendly Operation for Windows

TM

The dedicated printer driver and TrueType
and Windows 95/98 are available on the floppy disk and CD-ROM supplied with your
printer. You can easily install them into your Windows system using our installer
program. The driver supports our unique compression mode to enhance printing speed
in Windows applications and allows you to set various printer settings including toner
saving mode, custom paper size, sleep mode, gray scale adjustment, resolution and so
forth. You can easily setup these print options in the graphic dialog boxes through the
Printer Setup menu within the Windows Control Panel.

-compatible fonts for Microsoft® Windows 3.1

Printer Status Monitor with Bi-directional Parallel Interface

The printer driver can monitor your printer’s status using bi-directional parallel
communications. A high quality bi-directional parallel printer cable to the IEEE 1284
standard is recommended.

The printer status monitor program can show the current status of your printer. When
printing, an animated dialog box appears on your computer screen to show the current
printing process. If an error occurs, a dialog box will appear to let you know what to
correct. For example: when your printer is out of paper, the dialog box will display “No
Paper” and instructions for the corrective action to take.

Versatile Paper Handling

The printer has a multi-purpose sheet feeder and a straight paper path mechanism.
Using this mechanism, you can load A4, letter, legal, B5, A5, A6, and executive sizes of
paper, and various types of media including envelopes, organizer paper, or your custom
paper size.

Easy Copier Operation

The copy function is easy to operate. All the operations and settings (scaling, mode, and
number of copy settings) can be set on the scanner control panel.

Document Management Application ‘Visioneer PaperPort

®

LE Software’ (MFC-

P2000)

Visioneer PaperPort® LE Software is a document management application which
contains a viewer, editor and filing system and various links to other applications.
Visioneer PaperPort

®

LE Software is a sophisticated application and has widespread

industry acceptance and endorsements.

I-1

Sophisticated Viewer Software ‘WordCraft Unimessage™ Viewer Software’ (HL­P2000)

WordCraft Unimessage™ Viewer is a sophisticated viewer for displaying and editing
graphic files. In addition to the usual image editing functions (object drawing, annotations,
highlighting, etc.) you will also be able to use this software to view both color and
monochrome images, create cover sheets for use with HL-P2000, display thumbnails of
graphics files in any of your directories and set up a referencing system for your files
using DIR (Document Indexing Retrieval).

TWAIN Compliant Scanner Driver

The scanner driver is TWAIN compliant which is a defacto standard. You can use the
scanner from other TWAIN compliant applications as well as the PaperPort application or
Unimessage™ viewer application.

Environment-Friendly



Economy Printing Mode

This feature will cut your printing cost by saving toner. It is useful to obtain draft copies
for proof-reading. You can select from two economy modes, 25% toner saving and 50%
toner saving, through the Windows printer driver supplied with your printer.



Sleep Mode (Power Save Mode)

Sleep mode automatically reduces power consumption when the printer is not in use.
The printer consumes less than 13W when in sleep mode.



Low Running Cost

The toner cartridge is separate from the drum unit. You need to replace only the toner
cartridge after around 2,400 pages, which is cost effective and ecologically friendly.

The actual number of pages printed with each toner cartridge may vary depending on
your average type of print job.

Enhanced Memory Management

The printer provides its own data compression technology in its printer hardware and the
supplied printer driver software, which can automatically compress graphic data and font
data efficiently into the printer's memory. You can avoid memory errors and print most
full page 600 dpi graphic and text data, including large fonts, with the standard printer
memory.

Remote Printer Console Program for DOS

The utility program, Remote Printer Console (RPC), is available on the floppy disk and
CD-ROM supplied with your printer. When you operate your computer in the DOS (Disk
Operating System) environment, this program allows you to easily change the default
settings of the printer such as fonts, page setup, emulations and so on.

This program also provides a status monitor program, which is a Terminate-and-Stay
Resident (TSR) program. It can monitor the printer status while running in the
background and report the current status or errors on your computer screen.

Popular Printer Emulation Support

The printer supports the HP LaserJet IIP, Epson FX-850, and IBM Proprinter XL
emulations.

When you use DOS application software or Windows version 3.0 or earlier, you can use
any of these emulations to operate the printer in the 300 dpi resolution mode. The printer
also supports Auto-emulation switching between HP and Epson or HP and IBM. If you
want to set the emulation, you can do it using the Remote Printer Console Program.

I-2

2. PRINTER OVERVIEW

<Front View>

Top Cover

Document Extension

Support Wire

Extension Support Wire

<Rear View>

Automatic Document

Feeder (ADF)

Output Tray

Document Support

Paper Support

Paper Guide

Scanner Control Panel

Printer Control Panel

Fig. 1-1

Multi-purpose Sheet

Feeder

Parallel Interface

Port

Power Switch

AC Inlet

Power Cord

Fig. 1-2

I-3

3. SPECIFICATIONS

3.1 Printing

Print method Electrophotography by semiconductor laser beam scanning
Laser Wave length: 780 nm

Print resolution 600 x 600 dots/inch (dpi) (for Windows or DOS)
Print speed Up t o 10 pages/minute (ppm)

Warm-up Max. 30 seconds at 23°C (73.4°F)
First print 15 seconds

Print media Toner cartridge

Output: 5 mW max.

(when loading A4 or Letter-size paper from the multipurpose sheet
feeder)

(when loading Letter-size paper from the multipurpose sheet
feeder)

Life Expectancy: 2,400 pages/cartridge

(when printing A4 or letter-size paper at 5% print coverage)

Developer Drum unit, separated from toner cartridge

3.2 Scanning

Scan method CIS (Contact Image Sensor) system

Scan resolution 600 x 600 dpi class with 256 levels of gray
Scan speed 3 ppm
Effective scanning width 208 mm

3.3 Copying

Scaling Enlargement / Reduction ratio

Copy resolution 300 x 600 dpi class
Copy speed 1 copy: 20 second (3 ppm)

Life Expectancy: 20,000 pages/drum unit at 20 pages per job

8,000 pages at 1 page per job

(at 4% coverage)

For U.S.: 150%, 120%, 78%, 50%
For Europe: 200%, 141%, 71%, 50%

2 copies or more: 6 second (10 ppm)
Document setting Up to 10 sheets
Mode setting Text mode, Photo mode

I-4

3.4 Functions

CPU MC68EC000 16 Mhz
Emulation Brother Printing Solution for Windows

Printer driver Windows

Printer Interface Bi-directional parallel interface
Scanner Interface TWAIN 1.6 compatible
Memory 2.0 Mbytes
Viewer For U.S.: Visioneer PaperPort

OCR software Text Bridge (Xerox)
Printer Control Panel 1 switch and 4 lamps

PR99017

Automatic emulation selection among HP LaserJet IIP (PCL level

4), EPSON FX-850, and IBM Proprinter XL

TM

3.1/3.11, Windows 95/98 and Windows NT 4.0 driver,
supporting Brother Native Compression mode and bi-directional
capability.



LE Software

For Europe:

:RUG&UDIW 8QLPHVVDJH 9LHZHU

Scanner Control Panel 4 keys, 5 lamps, and 1 seven-segment LED

Diagnostics Self-diagnostic program

3.5 Electrical and Mechanical

Power source U.S.A. and Canada: AC 110 to 120V, 50Hz/60Hz

Europe and Australia: AC 220 to 240V, 50Hz/60Hz

Power consumption Printing (peak): 820W or less

Printing (average): 280W or less
Copying: 180W or less
Standing by: 60W or less
Sleep: 13W or less

Noise Printing: 49dB A or less

Standing by: 33dB A or less

Temperature Operating: 10 to 32.5°C (50 to 90.5°F)

Storage: 0 to 40°C (38 to 104°F)

Humidity Operating: 20 to 80% (non condensing)

Storage: 10 to 85% (non condensing)

Dimensions 390 x 371 x 283 mm (15.4 x 14.6 x 11.1 inches)

(W x D x H) (when the output tray is closed.)

Weight Approx. 8.5 kg (18.7lb.)

including the drum unit and toner cartridge

Note:

x

The peak figure of power consumption is worked out when the halogen heater lamp is
turned ON.

x

The peak figure of power consumption is worked out excluding inrush current value.

x

Be sure that the peak figure of power consumption is reference value and should be
used inside the Brother offices only.

I-5

3.6 Paper Loading

Paper size: A4, Letter, Legal, B5, A5, A6, and Executive.

Other sizes of media that can be handled by the feed
mechanism can be loaded into the multi-purpose sheet feeder.
(Refer to Fig. 1-1.)

69.8 to 229 mm

105 to 356mm (face down)

Feeding direction

Feedable paper weight: 60 (16 lb.) to 157 (42 lb.) g/m
Maximum load height : 22 mm (200 sheets of 80g/m2 paper) letter or A4 size

Setting method: Pull the MP sheet feeder cover toward you, insert the stack of

Cautions:



Before loading paper with holes such as organizer sheets, be sure to fan the stack
well.



When printing on the back of pre-printed paper, be sure to straighten the paper as
much as possible.

3.7 Print Delivery

(1) With the output tray opened

Tray capacity: Maximum 100 sheets (80g/m

(2) With the output tray closed

1 sheet (80g/m

Note:



Face down: Deliver the printed face of the paper downward.



Environment : 23°C

2

paper into the feeder, aligning the top edge of the sheets, then
push the cover back to its original position.

2

), face-down only

2

), face-down only

I-6

3.8 Print Paper

(1) Paper type

(a) Normal paper (60 to 157 g/m

• A4 size

• Letter size

• Legal size

• B5 (JIS ISO) size

• A5 size

• A6 size

• Executive size

2

, specified types of high-quality paper)

* The recommended types of plain paper are as follows:

Letter : Xerox 4200 (75g/m
A4 : Xerox 80 Premier Paper (80g/m

2

)

2

)

(b) Special paper (specified types)

• Labels

• Envelopes (DL, C5, COM-10, Monarch)

• Organizers (K, L, and J sizes of DAY-TIMERS)

(C) Other detailed specifications

Cut Sheet Envelope

2

Basis Weight 60 to 157 g/m

(16 to 42 lb.)



Caliper

0.03 to 0.08 in.

(0.08 to 0.2 mm)

2

75 to 90 g/m
(20 to 24 lb.)
single thickness

0.0033 to 0.0058 in.
(0.084 to 0.14 mm)
single thickness

Moisture Content 4% to 6% by weight 4% to 6% by weight

Caution:



It is recommended to use long-grained paper for the best print quality. If short-grained
paper is being used, it might be the cause of paper jams.



Use neutral paper. Do not use acid paper to avoid any damage to the printer drum
unit.

(2) Paper feed conditions

Type Name Feeder Number of sheets

60 to 80 g/m

2

Normal paper (cut sheet) 80 g/m2 paper (Legal)

157 g/m

2

Labels

Special paper (cut sheet) Envelopes

Organizers

I-7








200 sheets
100 sheets

30 sheets
50 sheets
10 sheets
10 sheets

3.9 Printing Area

(1) Effective printing area

(a)Supported by the engine (b)Supported by the emulation

4.23mm

4.23mm

211mm

25 25

2,100 (80 characters)

Note:



The units in the above figure are dot size
based on 300 dpi resolution.



25 dots at both sides is for italic characters.

The effective printing area means the area within which the printing of all the data
received without any omissions can be guaranteed.

(2) Print guaranteed area

F

E

B

D

A

CE

F

I-8

The table below shows the print guaranteed areas for each paper size.

Size A B C D E F

A 4

Letter

Legal

B 5 (JIS)

B 5 (ISO)

Executive

A 5

A6

Organizer
(J size)

Organizer
(K size)

Organizer
(L size)

COM-10

MONARCH

C 5

DL

210.0 mm

8.27”
(2,480 dots)

215.9 mm

8.5”
(2,550 dots)

215.9 mm

8.5”
(2,550 dots)

182.0 mm

7.16”
(2,149 dots)

176.0 mm

6.93”
(2,078 dots)

184.15 mm

7.25”
(2,175 dots)

148.5 mm

5.85”
(1,754 dots)

105.0 mm

4.13”
(1,240 dots)

69.85 mm

2.75”
(825 dots)

95.25 mm

3.75”
(1,125 dots)

139.7 mm

5.5”
(1,650 dots)

104.78 mm

4.125”
(1,237 dots)

98.43 mm

3.875”
(1,162 dots)
162 mm

6.38”
(1,913 dots)
110 mm

4.33”
(1,299 dots)

297.0 mm

11.69”
(3,507 dots)

279.4 mm

11.0”
(3,300 dots)

355.6 mm

14.0”
(4,200 dots)

257.0 mm

10.12”
(3,035 dots)

250.0 mm

9.84”
(2,952 dots)

266.7 mm

10.5”
(3,150 dots)

210.0 mm

8.27”
(2,480 dots)

148.5 mm

5.85”
(1,754 dots)

127.0 mm

5.0”
(1,500 dots)

171.45 mm

6.75”
(2,025 dots)

215.9 mm

8.5”
(2,550 dots)

241.3 mm

9.5”
(2,850 dots)

190.5 mm

7.5”
(2,250 dots)
229 mm

9.01”
(2,704 dots)
220 mm

8.66”
(2,598 dots)

203.2 mm

8.0”
(2,400 dots)

203.2 mm

8.0”
(2,400 dots)

203.2 mm

8.0”
(2,400 dots)

173.5 mm

6.83”
(2,007 dots)

164.0 mm

6.46”
(1,936 dots)

175.7 mm

6.92”
(2,025 dots)

136.5 mm

5.37”
(1,612 dots)

93.0 mm

3.66”
(1,098 dots)

56.2 mm

2.21”
(675 dots)

86.78 mm

3.42”
(975 dots)

131.23 mm

5.17”
(1,500 dots)

92.11 mm

3.63”
(1,087 dots)

85.7 mm

3.37”
(1,012 dots)

150.0 mm

5.9”
(1,771 dots)

98.0 mm

3.86”
(1,157 dots)

288.5 mm

11.36”
(3,407 dots)

270.9 mm

10.67”
(3,200 dots)

347.1 mm

13.67”
(4,100 dots)

248.5 mm

9.78”
(2,935 dots)

241.5 mm

9.5”
(2,852 dots)

258.2 mm

10.17”
(3,050 dots)

201.5 mm

7.93”
(2,380 dots)

140.0 mm

5.51”
(1,654 dots)

118.5 mm

4.66”
(1,400 dots)

162.98 mm

6.42”
(1,925 dots)

207.43 mm

8.17”
(2,450 dots)

232.8 mm

9.16”
(2,750 dots)

182.0 mm

7.16”
(2,150 dots)

220.5 mm

8.68”
(2,604 dots)

211.5 mm

8.33”
(2,498 dots)

3.4 mm

0.13”
(40 dots)

6.35 mm

0.25”
(75 dots)



6.01 mm

0.24”
(71 dots)



6.35 mm

0.25”
(75 dots)

6.01 mm

0.24”
(71 dots)



6.35 mm

0.25”
(75 dots)









6.01 mm

0.24”
(71 dots)



4.23 mm

0.17”
(50 dots)













(Note that the paper sizes indicated here should conform to the nominal dimensions
specified by JIS.)



A4 paper must accommodate 80 characters printed in pica pitch (203.2 mm).



The dot size is based on 300 dpi resolution.



Organizer is not supported by any printer emulations (commands).

I-9

3.10 Document Loading

Documents with the specification below should be loaded into the automatic document
feeder (ADF). (Refer to Fig. 1-1.)

(1) Feedable document size / thickness / weight

Size 70 - 216 x 100 - 360 mm
Thickness ADF: 0.08 - 0.12 mm

Weight ADF: 64 - 90 g/m

(2) Maximum load

10 sheets

(3) Document type

Normal paper

(4) Setting

Face down

3.11 Document Delivery

(1) Method

600 dpi/step by clockwise rotation of the scanning stepper motor

One page: 0.07 - 0.20 mm

2

One page: 52 - 158 g/m

2

(2) Document output tray

• On the top cover

• On the document extension wire (when it is opened)

(3) Document output capacity (on the document extension wire)

10 sheets
(Document alignment cannot be guaranteed.)

I-10

4. SAFETY INFORMATION

4.1 Laser Safety (110 - 120V Model only)

This printer is certified as a Class 1 laser product under the US Department of Health and
Human Services (DHHS) Radiation Performance Standard according to the Radiation
Control for Health and Safety Act of 1968. This means that the printer does not produce
hazardous laser radiation.

Since radiation emitted inside the printer is completely confined within the protective
housings and external covers, the laser beam cannot escape from the printer during any
phase of user operation.

4.2 FDA Regulations (110 - 120V Model only)

The US Food and Drug Administration (FDA) has implemented regulations for laser
products manufactured on and after August 2, 1976. Compliance is mandatory for
products marketed in the United States. One of the following labels on the back of the
printer indicates compliance with the FDA regulations and must be attached to laser
products marketed in the United States.

The label for Japanese manufactured products

MANUFACTURED: K
BROTHER INDUSTRIES, LTD.

15-1, Naeshiro-cho, Mizuho-ku, Nagoya 467-8561, Japan.
This product complies with FDA radiation
performance standards, 21 CFR Subchapter J.

The label for Chinese manufactured products

MANUFACTURED : C
BROTHER Corporation (Asia) Ltd.
Shenzen Buji Nan Ling Factory
Gold Garden Ind., Nan Ling Village, Buji, Rong Gang,
Shenzhen, CHINA
This product complies with FDA radiation
performance standards, 21 CFR Subchapter J.

Caution

Use of controls, adjustments or performance of procedures other than those specified in
this manual may result in hazardous radiation exposure.

I-11

4.3 IEC 825 (220-240V model only)

This printer is a Class 1 laser product as defined in IEC 825 specifications. The label
shown below is attached in countries where required.

CLASS 1LASER PRODUCT
APPAREIL Å LASER DE CLASSE 1
LASER KLASSE 1 PRODUKT

This printer has a Class 3B Laser Diode which emits invisible laser radiation in the Laser
Unit. The Laser Unit should not be opened under any circumstances.

Caution

Use of controls, adjustments or performance of procedures other than those specified in
this manual may result in hazardous radiation exposure.

The following caution label is attached near the laser unit.

INVISIBLE LASER RADIATION WHEN OPEN AND INTERLOCK DEFEATED.

CAUTION
ADVARSEL
VARNING
VARO!

ADVARSEL
ATTENTION
VORSICHT

ATENCIÓN

AVOID DIRECT EXPOSURE TO BEAM. CLASS 3B LASER PRODUCT.
USYNLIG LASER STRÅLING NÅR KABINETLÅGET STÅR ÅBENT.

UNGDÅ DIREKTE UDSÆTTELSE FOR STRÅLING. KLASSE 3B LASER.
OSYNLIG LASERSTRÅLNING NÄR DENNA DEL ÄR ÖPPNAD OCH SPÄRRAR

ÄR URKOPPLADE. STRÅLEN ÄR FARLIG. KLASS 3B LASER APPARAT.
AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALTTIINA

NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE. ÄLÄ KATSO SÄTEESEEN. LUOKAN
3B LASERLAITE.

USYNLIG LASERSTRÅLING.UNNGÅ DIREKTE KONTAKT MED LASERENHETEN
NÅR TOPPDEKSELET ER ÅPENT. KLASSE 3B LASERPRODUKT.

RADIATIONS LASER INVISIBLES QUANDOUVERT ET VERROUILLAGE ENLEVE.
EVITER EXPOSITIONS DIRECTES AU FAISCEAU. PRODUIT LASER CLASSE 3B.

UNSICHTBARE LASERSTRAHLUNG WENN ABDECKUNG
GEÖFFENT UND SICHERHEITSVERRIEGELUNG
ÜBERBRÜCKT. NICHT DEM STRAHL AUSSETZEN.
SICHERHEITSKLASSE 3B.

RADIACIÓN LASER INVISIBLE CUANDO SE ABRE
LA TAPA Y EL INTERRUPTOR INTERNO ESTÁ
ATASCADO. EVITE LA EXPOSICIÓN DIRECTA
DE LOS OJOS. PRODUCTO LASER CLASE 3B.

For Finland and Sweden
LUOKAN 1 LASERLAITE
KLASS 1 LASER APPARAT

Varoitus! Laitteen käyttäminen muulla kuin tässä käyttöohjeessa mainitulla tavalla saattaa
altistaa käyttäjän turvallisuusluokan 1 ylittävälle näkymättömälle lasersäteilylle.

Varning – Om apparaten används på annat sätt än i denna Bruksanvisning specificerats,
kan användaren utsättas för osynlig laserstrålning, som överskrider gränsen för
laserklass 1.

I-12

4.4 Additional Information

When servicing or adjusting the optical system of the printer, be careful not to place a
screwdriver or other reflective object in the path of the laser beam. Be sure to take off
any personal accessories such as watches and rings before working on the printer. A
reflected beam, though invisible, can permanently damage the eyes.

4.5 Caution for Laser Product (Warnhinweis für Laserdrucker)

CAUTION: When the machine during servicing is operated with the cover open, the

regulations of VBG 93 and the performance instructions for VBG 93 are
valid.

CAUTION: In case of any trouble with the laser unit, replace the laser unit itself. To

prevent direct exposure to the laser beam, do not try to open the enclosure
of the laser unit.

ACHTUNG: Im Falle von Störungen der Lasereinheit muß diese ersetzt werden. Das

Gehäuse der Lasereinheit darf nicht geöffnet werden, da sonst
Laserstrahlen austreten können.

<Location of the laser beam window>

Fig. 1-3

I-13

Window

CHAPTER II THEORY OF OPERATION

1. ELECTRONICS

1.1 General Block Diagram

Fig. 2-1 shows a general block diagram of the MFC-P2000 / HL-P2000 printer.

Control system

Scanner block

CIS

supply block

Low-voltage power

supply block

High-voltage power

Video control block

Laser scanner unit

Drum unit

Developing

block

Engine control block

Transfer block

Drum

Interface block

Drive block

(Stepping motor)

Cleaner

block

External device

Operation block

(Operation panel)

Erase lamp

Paper tray unit

Paper tray

Manual feed

Fixing unit

Charging

block

Toner cartridge

Image generation system

Paper eject block

Paper feed system

Fig. 2-1

II-1

1.2 Main PCB Block Diagram

Fig. 2-2 shows the block diagram of the main PCB.

Reset Circuit

Program + Font ROM

1Mbyte

RAM

(2.0 Mbytes)

CPU Core

(MC68EC000)

BUS

A S I C

Oscillator (15.3MHz)

INT

Address Decoder

DRAM Control

Timer

FIFO

CIS

Sub ASIC

Scan IC

EEPROM (512 8 bits)

Motor Driver

To Panel Sensor PCB

Fig. 2-2

DATA EXTENSION

CDCC Parallel I/O

Soft Support

EEPROM I/O

Engine Control I/O

To PC

II-2

1.3 Main PCB

1.3.1 CPU Core

Fig. 2-3 shows the CPU circuit block on the main PCB.
The CPU is a Motorola MC68EC000FN16 which is driven at a clock frequency of 15.3

MHz. This clock frequency is made by dividing the source clock of 30.67 MHz by two.

Fig. 2-3

1.3.2 ASIC

The ASIC is composed of a Cell Based IC that contains the following functional blocks.
(1) Oscillator circuit

Generates the main clock for the CPU by dividing the source clock frequency by
two.

(2) Address decoder

Generates the CS for each device.

(3) DRAM control

Generates the RAS, CAS, WE, OE and MA signals for the DRAM and controls
refresh processing (CAS before RAS self-refreshing method).

(4) Interrupt control

Interrupt levels:
Priority High 7 NMI

6 FIFO
5 SCANINT
4 BD / Timer 1
3 SCANINT
2 CDCC / BOISE / DATA EXTENSION

Low 1 Timer 2

II-3

(5) Timers

The following timers are incorporated:

Timer 1 16-bit timer
Timer 2 10-bit timer
Timer 3 Watch-dog timer

(6) FIFO

A 5,120-bit FIFO is incorporated. Data for one raster scan is transferred from the
RAM to the FIFO by DMA transmission and is output as serial video data. The
data cycle rate is 10.22 MHz.

(7) CDCC parallel I/O

<Data receiving>
There are two modes in this unit. One is the CPU receiving mode and the other is

the DMA receiving mode. In the CPU receiving mode the CPU receives the
command data from the PC, and after the CPU is switched to the DMA mode, it
receives the image data and writes to the DRAM directly.

CPU Receive Mode

STROBE

BUSY
ACK

90 µsec

0.5 µsec

DMA Receive Mode

STROBE

BUSY
ACK

0.5 µsec1.5 µsec

BUSY goes HIGH at the falling edge of STROBE. The data (8 bits) from the PC is
latched in the data buffer at the rising edge of STROBE. The pulse width of ACK
differs according to the speed MODE as shown above. BUSY goes LOW at the
rising edge of ACK.

<IEEE1284 support>
This supports the IEEE1284 data transfer with the following modes.

Nibble mode
Byte mode

(8) Data expansion

This circuit expands the compressed image data received from the PC, and writes
the bit map data to the FIFO.

(9) Software support

Supports 16 x 16 rotation, bit expansion and bit search.

II-4

(10) EEPROM I/O

One output port and one I/O port are assigned.

(11) Engine control I/O

This I/O is used for the connection to the panel sensor PCB. It controls the main
motor, solenoid, sensors, etc.

Fig. 2-4

II-5

1.3.3 ROM

A program file of 1 Mbyte and the font data are stored in the ROM.

Fig. 2-5

1.3.4 DRAM

A 16M-bit DRAM (x 16 bits) is used as the RAM.

Fig. 2-6

II-6

1.3.5 EEPROM

The EEPROM is an X24C04 type of two-wire method with a 512 x 8 bits configuration.
M62320FP is an IC which transfers the data received from the serial I/O to the parallel

I/O.

Fig. 2-7

1.3.6 Reset Circuit

The reset IC is a PST598DNR. The reset voltage is 4.2V (typ.) and the LOW period of
reset is 200ms (typ.).

Fig. 2-8

1.3.7 CDCC I/O

Fig. 2-9 shows the CDCC interface circuit.

Fig. 2-9

II-7

1.3.8 Engine I/O

Fig. 2-10 shows the engine interface circuit.

Fig. 2-10

II-8

1.3.9 Paper Feed Motor Drive Circuit

The paper feed motor driver is a TR array. The excitation method is 2-2 phase excitation
with a bipolar drive.

Fig. 2-11

II-9

1.3.10 Document Scanner Circuit

The image processing LSI, SANYO LC82103 transfers the analog signal from the CIS
into a digital signal. The gate array, NEC PD65646 stores the digital signal in DRAM
with DMA (direct memory access).
The document scanner circuit also provides the motor drive pulse generating circuit,
PWM (pulse width modulation) circuit for CIS current adjustment and general purpose
I/O.

Fig. 2-12

1.3.11 Scanner Panel I/F

The scanner panel interface is a serial interface. The front sensor and rear sensor are
directly connected to the NEC PD65646.

Fig. 2-13

II-10

1.3.12 Scanner Motor Drive Circuit

The scanner motor is controlled by unipolar constant current control. The combination of
the current flow and the phase excitation method is changed by the scanner motor
speed.

1.3.13 CIS Drive Circuit

The current to the CIS LED is controlled by PWM. The analog signal from the CIS is
input into the LC82103.

1.4 Panel Sensor PCB

The following parts are on the printer panel sensor PCB.

• Control panel ......1 switch, 4 lamps

• Connector...........low-voltage, high-voltage, solenoid, main motor, toner sensor, laser,

• Registration sensor

Fig. 2-14

Fig. 2-15

polygon motor, connector for main PCB

1.5 Scanner Sensor PCB / Scanner Panel PCB

The following parts are on the scanner sensor PCB and scanner panel PCB.

• Control panel ......4 keys, 5 lamps, 1 seven-segment LED

• Document front sensor

• Document rear sensor

II-11

1.6 Power Supply

1.6.1 Low-voltage Power Supply

The low-voltage power supply uses a switching regulation system to generate the
regulated DC power (+5V and +24V), which are converted from the AC line.

The regulated output and the production code of each power supply are listed below;

Regulated Output Production Code
+5V / 1.2A
+24V / 2.0A

100V: MPW1550
200V: MPW1450

(Heater)

Fuse

Line

Filter

Lightning

Surge

Absorber

Rectifier Oscillator

Thermal

Fuse

Heater
Circuit

Lamp

Feedback

24V

Regulation

Circuit

5V

Regulation

Circuit

Fig. 2-16

(Panel Sensor Circuit)

24V

5V

II-12

1.6.2 High-voltage Power Supply

The high-voltage power supply generates and outputs the voltages and currents for the
charging, development and transfer functions.

24VI

GND

R1

Current

Regulator

B1

Voltage

Regulator

VR22

Current

Regulator

B81 Q81

Voltage

Regulator

B101 Q101

Current

Regulator

Supply
Roller

Development

Roller

Photosensitive

Drum

Corona

Unit

Transfer Roller

Cleaning

Roller

PAPER

SENSOR

PC141

B121 Q121

Voltage

Regulator

Z51 VR51

Voltage

Regulator

VR71

Voltage

Regulator

VR61

Fig. 2-17

II-13

2. MECHANICS

2.1 General Overview of Mechanism

Papers

Multi-purpose Sheet Feeder

Scanner Control Panel

Paper Pick-up Roller

Paper Feed
Roller

Drum Unit

Hopper
Plate

Registration Sensor Lever

Toner Cartridge

Polygon Mirror

Laser Scanner

Toner Empty
Sensor

Supply Roller

Fig. 2-18

Scanner Sensor PCB

Pinch Roller

Laser Unit

Scan Motor

Blade

Corona Wire

Photosensitive Drum

Transfer
Roller

Erase Lamp

Development
Roller

Document Front Sensor
Document Rear Sensor

Scanner Panel PCB

Fixing Unit

Pressure Roller

Eject Roller

Eject Sensor
Actuator

Heat Roller

Thermistor

Cleaning Roller

Main Cotrol PCB

Panel
Sensor
PCB

CIS

EL PCB

Laser Unit

Main Motor
Sub Motor

Main Fan Motor
Sub Fan Motor

High­Voltage
Power
Supply

Toner
Empty
Sensor
PCB

Fig. 2-19

II-14

Thermistor (for Heat roller)

Solenoid

Primary Charger (Corona Wire)

Primary Charger (Grid)

Development Roller
Transfer Roller
Cleaning Roller
Supply Roller
Eject Sensor

Registration Sensor

Toner Empty Sensor
Thermistor (for Toner)

2.2 Printer Mechanism

2.2.1 Paper Transfer

1) Paper Supply
The paper pick-up roller picks up one sheet of paper from the paper feeder every time it

is rotated and feeds it to the paper feed roller.

Papers

Hopper plate

Separation pad

Fig. 2-20

Pick-up roller

Registration sensor lever

The paper is gripped between the pick-up roller and the separation pad and separated
into individual sheets.

The pick-up roller is directly connected to the sector gear, whose rotation is forcibly
stopped by the gear stopper. When the pick-up solenoid is activated, the clutch
mechanism is engaged by the solenoid action and the sector gear is driven; when it has
completed one full turn its rotation is stopped again by the gear stopper. The paper
drawn out by the pick-up roller pushes against the top of form sensor lever and the paper
top position/absence of paper is detected by sensing the motion of the lever.

2) Paper Registration
When paper picked up from the multi-purpose sheet feeder pushes against the top of

form sensor actuator, the registration sensor lever is caused to turn, and the photo
sensor detects this motion. When this signal from the sensor is detected the paper feed
roller is stopped temporarily by the clutch. The paper is fed to the nip point between the
paper feed roller and the pinch roller in the multi-purpose sheet feeder, and the skew of
the paper is corrected by pushing the leading edge of the paper against the nip point.
When the paper feed roller starts to be rotated again when it is released by the clutch,
paper, with the leading edge correctly aligned, is fed by the paper feed roller and is
transported to the transfer roller.

Paper

Paper feed roller

Clutch mechanism (engaged/released by the solenoid assembly)
Released when the solenoid is ON and engaged when the solenoid is OFF.

Pinch roller

Transfer roller

Drum

Fig. 2-21

II-15

3) Paper Eject

,

,







The completion of paper eject is detected in the following manner:
(a) When the leading edge of the paper pushes down the eject sensor actuator

located in the fixing unit, the photo sensor (photo interrupter) is opened and
detects the start of paper eject.

(b) When the trailing edge of the paper has passed through the paper eject sensor

actuator, the photo sensor is closed and the completion of paper eject is
recognized.

Transfer roller

Pressure roller

Eject sensor actuator

Eject roller

Drum

Heat roller

Eject sensor actuator

High-voltage power
suppl

y PCB

Fig. 2-22

Paper

Sensor

Eject sensor actuator

Sensor

Fig. 2-23

II-16

2.2.2 Sensors

1) Cover Sensor
Detects opening and closing of the top cover.

Top Cover

Cover Switch

Fig. 2-24

Toner Empty
Sensor

2) Toner Empty Sensor
Detects if there is toner in the toner cartridge. It also detects whether or not the drum unit

is installed. (The toner cartridge is installed in the drum unit).

Fig. 2-25

II-17

2.2.3 Drum Unit

1) Photosensitive Drum
Generates the latent electrostatic image and develops the image on the drum surface.

2) Primary Charger
Forms a uniform charge on the drum surface.

(a) Corona wire

Generates the ion charge on the drum.

(b) Grid

Spreads the ion charge evenly over the drum surface.

3) Development Roller
Develops the latent electrostatic image on the drum surface by the addition of the toner.

4) Transfer Roller
Transfers the toner image to the paper from the drum surface.

5) Cleaning Roller
Removes and recycles the toner remaining on the drum surface.

6) Erase Lamp
Discharges the electrostatic latent image on the drum.

2.2.4 Print Process

1) Charging
The drum is charged to approx. +1150V by an ion charge which is generated by the

primary charger. The charge is generated by ionization of the corona wire, which has a
DC bias from the high-voltage power supply applied to it. The flow of the ion charge is
controlled by the grid to ensure it is distributed evenly on the drum surface. The drum
sleeve is regulated to approx. 280V by the voltage regulator.

Passive Type
Voltage Regulator

Drum

Voltage
Regulator

1150V

-

+

-

-

+

+

+

Corona wire

280V

-

-

-

-

-

---

+

+

+

+

+

+

+

+

+

+

+

+

+

+

+

+

+

Fig. 2-26

Aluminum drum sleeve
Organic Photoconductor layer

Grid

HVPS

The primary charge uses a corona wire, but since the drum is positively charged, only
less than 1/10 of the usual quantity of ozone is generated compared with the negatively
charged drum. The level of ozone expelled from the printer is therefore not harmful to the
human body. Applicable safety standards have been complied with.

II-18

2) Exposure Stage
After the drum is positively charged, it is exposed to the light emitted from the laser unit.

Laser detector

Drum

Paper

Laser beam

f  lens

Polygon mirror

Laser diode

Motor

Lens

Fig. 2-27

Laser Beam

The area exposed to the laser beam is the image to be printed. The surface potential of
the exposed area is reduced, forming the electrostatic image to be printed.

+1150

1 Cycle of drum

123

(a)

4

Primary charging

1
2

Laser beam exposure and developing
(a) Unexposed area
( Non image area )
(b) Exposed area
( Image area )

+700

Surface Potential (V)

+400
+300

Drum
Sleeve

(b)

Time

Fig. 2-28

3

Transfer the image to paper
Erase the residual potential

4

II-19

3) Developing

(a)

]

g

Developing causes the toner to be attracted to the electrostatic image on the drum so as
to transform it into a visible image.

The developer consists of a non-magnetic toner. The development roller is made of
conductive rubber and the supply roller (which is also made of conductive sponge) rotate
against each other. The toner is charged and carried from the supply roller to the
development roller. The toner adheres to the development roller and is conveyed to the
drum at an even thickness controlled by the blade. The toner is nipped between the
development roller and the drum and developed onto the latent image on the drum. The
electrostatic field between the drum and the development roller, which is DC-biased from
the high-voltage power supply, creates the electrostatic potential to attract toner particles
from the development roller to the latent image area on the drum surface.

Blade

Toner

Separator

Auger

Develop housing

Supply roller

SR-bias

4) Transfer
(a) Transfer process

After the drum has been charged and exposed, and has received a developed
image, the toner image formed on the drum is transferred onto the paper by
applying a negative charge to the back of the paper. The negative charge applied
to the paper causes the positively charged toner to leave the drum and adhere to
the paper. As a result, the image is visible on the paper.

(b) Cleaning process of transfer roller

If the toner is not transferred onto the paper perfectly, it is possible that there may
be residual toner on the drum which will adhere to the transfer roller. The transfer
voltage changes to a positive voltage during non-printing rotation of the drum.
Therefore the transfer roller is cleaned by returning the positively charged toner
adhering to the transfer roller onto the photo-conductive drum.

DC-bias

Transfer roller

Development
roller

Fig. 2-29

Cleanin

Charger

Transfer process [ON

(b) Cleaning process [ON]

Drum

Erase lamp

(a) Collecting process

(b) Discharging process

roller

II-20

5) Drum Cleaning Stage

,

,,

,

,,,,,

,,

,,

,,,,

,,,,

,,

,

,,

,,

In the image transfer stage, not all the toner on the photosensitive drum is transferred
onto the paper but some remains on the drum. In the drum cleaning stage, the drum
surface is cleaned by the cleaning roller, so that residual toner on the drum surface is
removed and collected on the cleaning roller itself. The residual toner on the cleaning
roller will be discharged to the drum during starting or non-printing time. The toner will be
collected by the developing roller and reused (for further developing).

6) Erasing Stage
Before the cleaning stage, the drum surface is exposed to the light emitted from the

erase lamp (LED lamp). This stage prepares the drum by decreasing its surface voltage

uniformly, ready to receive a uniform charge in the primary charging stage.

7) Fixing Stage
The image transferred to the paper by static electricity is fixed by heat and pressure when

passing through the heat roller and the pressure roller in the fixing unit. The thermistor
ASSY keeps the surface temperature of the heat roller constant by detecting the surface
temperature of the heat roller and turning on or off the halogen heater lamp.

Pressure roller

Thermistor ASSY

Halogen heater lamp

Heat roller

Cleaner ASSY

Fig. 2-30

II-21

2.3 Scanner Mechanism

Document

ADF parts

Separation roller

Pressure roller

CIS unit

Document front sensor actuator

Document rear sensor actuator

Document feed roller

Document pressure bar

Document eject roller

Pinch roller

Fig. 2-31

2.3.1 Document Transfer (Feed and Eject)

This mechanism consists of the document stacker, automatic document feeder (ADF),

document eject roller ASSY and two document sensors (document front sensor,
document rear sensor).

If documents are set face down on the document stacker to start the scanning operation,
the document front sensor detects the document, then the scanner motor rotates so that
the ADF (which consists of the separation roller and ADF parts) feeds those documents
into the equipment, starting from the bottom sheet to the top, page by page. Each
document is advanced by the document feed roller ASSY to the scanner, and it is fed out
of the equipment with the document eject roller ASSY. The document rear sensor
detects that the document is fed out without any paper jam.

2.3.2 Scanner

The scanner uses a contact image sensor (CIS) unit which consists of an LED array to
illuminate the document, a self-focus lens array to collect the reflected light, a CIS to
carry out photoelectric conversion to output picture element data and a cover glass on
which the document advances. When the document passes between the document
pressure bar and the cover glass, it is scanned.

II-22

CHAPTER III DISASSEMBLY AND REASSEMBLY

1. SAFETY PRECAUTIONS

To avoid creating secondary problems by mishandling, be careful to follow the following
precautions during maintenance work.

(1) Always turn off the power switch and unplug the power cord from the power outlet

before accessing any parts inside the printer.
(2) Be careful not to lose screws, washers or other parts removed.
(3) Be sure to apply grease to the gears and applicable positions specified in this

chapter.
(4) When using soldering irons or other heat-generating tools, take care not to

accidentally damage parts such as wires, PCBs and covers.
(5) Before handling any PCBs, touch a metal portion of the equipment to discharge

any static electricity charge on your body, or the electronic parts or components

may be damaged.
(6) When transporting PCBs, be sure to wrap them in the correct protective packaging.
(7) Be sure to replace self-tapping screws correctly, if removed. Unless otherwise

specified, tighten screws to the following torque values.

TAPTITE, BIND or CUP B

M3x6: 4kgf • cm
M3x8: 7kgf • cm
M4 : 9kgf • cm

TAPTITE, CUP S

M3 : 8kgf • cm

SCREW

M3 : 7kgf • cm
M4 : 8kgf • cm

(8) When connecting or disconnecting cable connectors, hold the connector body, not

the cables. If the connector has a lock, release the connector lock first to release

it.
(9) After a repair, check not only the repaired portion but also all connectors. Also

check that other related portions are functioning properly before operational

checks.

III-1

2. DISASSEMBLY FLOW

PS PCB ASSY

HIGH-VOLTAGE

MAIN FAN MOTOR

14

LOW-VOLTAGE

PS PCB ASSY

13

16

DRIVE UNIT

17

MAIN MOTOR ASSY

18

SUB MOTOR ASSY

19

A

BOTTOM

DRUM UNIT

1

MAIN PCB ASSY

10

BASE PLATE ASSY

11

OUTPUT TRAY ASSY
2

PANEL SENSOR PCB ASSY
12

SUB FAN MOTOR ASSY

15

A

TOP COVER

3

SCANNER CONTROL PANEL ASSY

4

DOCUMENT SCANNER FRAME ASSY

5

SCANNER REAR COVER ASSY / REAR COVER ASSY

6

MP REAR SHEET FEEDER ASSY

7

III-2

DOCUMENT SUPPORT / PAPER SUPPORT

EXTENSION SUPPORT WIRE

DOCUMENT EXTENSION SUPPORT WIRE

22

21

20

FIXING UNIT

8

LASER UIT

9

3. DISASSEMBLY PROCEDURE

3.1 Drum Unit

(1) Open the top cover.
(2) Lift out the drum unit.

Drum Unit

Main Cover

Top Cover

Fig. 3-1

3.2 Output Tray ASSY

(1) Open the output tray toward you.
(2) Press the hinges at the left and right sides of the output tray inwards to release the

output tray from the main cover.

Main Cover

Output Tray

Output Tray

Fig. 3-2

III-3

3.3 Top Cover

(1) Open the top cover.
(2) Press the hinges at the left and right sides of the top cover inwards to release the

top cover from the main cover.

Note:
It is recommended for easy removal to press the side of the top cover (
the side of the main cover (

➁

).

) while pulling

➀

Top Cover

2

Main Cover

Fig. 3-3

Main Cover

1

Top Cover

III-4

3.4 Scanner Control Panel ASSY

(

)

(1) Open the scanner control panel ASSY toward you.
(2) Pull the hinges at the left and right sides of the document scanner frame ASSY

outwards to release the two hooks of the scanner control panel ASSY.
(3) Disconnect the sensor harness on the right hand side.
(4) Remove the scanner control panel ASSY from the scanner frame.

Scanner Control Panel

Scanner Frame

Fig. 3-4

Sensor Harness

Note:
When replacing/reassembling the scanner control panel ASSY, remove the old grease
and apply a suitable amount of grease to the points on both the scanner control panel
and scanner frame as shown ;

Scanner Control Panel

Grease: Molykote EM-

1 rice-grain size

30L

Scanner Frame

Fig. 3-5

III-5

PR98242

(5) Remove the M3x6 pan tapping screw securing the front spring plate, washer,

separation rubber and ADF spring plate, then remove all of them. Note that the

vibration proof rubber is attached to the back of the ADF spring plate.

(6) Press one side of the document pressure bar inwards to remove it. The spring will

be released and should also be removed.
(7) Remove the document rear sensor actuator .

Taptite, pan M3x6

Document Pressure Bar

Document Rear

Sensor Actuator

Front Spring Plate

Vibration Proof Rubber

Washer

Separation Rubber

ADF Spring Plate

Spring

Fig. 3-6

(8) Remove the six M3x8 tapping screws from the panel rear cover.
(9) Release the four hooks to remove the panel rear cover.
(10) Remove the document front sensor actuator with the helical torsion spring .

Note:



Do not lose the helical torsion spring when disassembling the document front sensor
actuator. The spring easily comes off from the actuator.



When reassembling the helical torsion spring to the document front sensor actuator,
ensure that the direction of the spring is correct.



Assemble the document front sensor actuator while lightly pressing it. Then check
that the document front sensor works correctly by turning ON/OFF the sensor with the
actuator.

III-6

Document Front
Sensor Actuator

Panel Rear Cover

Taptite, cup M3x8

Helical Torsion Spring

Taptite, cup M3x8

(11) Remove the three M3x6 tapping screws to remove the scanner panel PCB, then

Taptite, cup M3x8

Scanner Control
Panel

Fig. 3-7a

remove the two M3x6 tapping screws to remove the scanner sensor PCB.
(12) Disconnect the scanner panel harness ASSY connected between the scanner

(13) Remove the four keys from the scanner control panel .

Scanner Panel

Taptite, cup M3x6

Scanner Sensor PCB

panel PCB and the scanner sensor PCB.

Taptite, cup M3x6

Harness

Scanner Panel PCB

Scanner Panel PCB

Scanner Panel Keys

Fig. 3-8

III-7

3.5 Document Scanner Frame ASSY

(1) Remove the four M3x8 tapping screws.
(2) Release the three hooks, then disconnect the R motor harness at the right hand

side and the CIS harness at the left hand side.
(3) Remove the M3x6 screw to disconnect the motor frame FG harness.
(4) Remove the document scanner frame ASSY.

Document Scanner Frame

CIS Unit

CIS Harness

Taptite, cup M3x8

Taptite,
cup M3x8

Motor Frame FG
Harness

R Motor Harness

Scanner
Drive Unit

Screw, pan
M3x6

Fig. 3-9

III-8

Note:
When replacing/reassembling the document scanner frame ASSY, remove the old
grease and apply a suitable amount of grease to the point shown below ;

Grease: Molykote EM-30L
(1 rice-grain size)

Panel open spring

Document Scanner
Frame

Fig. 3-10

(5) Remove the document feed roller ASSY and the document eject roller ASSY from

the scanner frame. It is recommended for easy removal to release the hook

retaining the shaft from the groove of the shaft and slide the shaft towards the gear

side.
(6) Remove the CIS film and gear shield film from the scanner frame.

Hook

Document

Eject Roller

Caution:



Once you remove the CIS film and gear shield film, they will become unusable. You
must fit new ones.



Do not touch or damage the surface of the CIS unit when disassembling the rollers or
CIS film.

Document Feed Roller

Hook

Document Feed Roller

Document
Eject Roller

Scanner Frame

CIS Film

Gear Shield Film

Fig. 3-11

III-9

Pinch roller

CIS Film

Tabs

Align the cutout
of the CIS film
with this
position of the
scanner frame.

(7) Slightly lift the arm, move the CIS unit to the left, then remove it.
(8) Remove the two CIS back-up springs.

CIS Back-up Spring

Scanner Frame

CIS Unit

Arm

CIS Unit

CIS Back-up
Spring

CIS Back-up
Spring

Scanner Frame

Fig. 3-12

Note:
When replacing/reassembling the document feed roller ASSY and the document eject
roller ASSY , remove the old grease and apply a suitable amount of grease to the points
shown below ;

Document Feed Roller

Grease:
Molykote EM­30L (1 rice-grain
size)

Document Eject Roller

Grease: Molykote EM­30L

(1 rice-grain size)

Fig. 3-13

III-10

(9) Turn the scanner frame ASSY upside down.
(10) Remove the two M3x8 tapping screws.
(11) Remove the separation roller from the scanner frame by pressing the hook

(12) Remove the scanner drive unit .

Separation Roller

retaining the plastic shaft between the ADF gear and the separation roller.

Scanner Frame

Scanner Drive Unit

Taptite, cup M3x8

Scanner Frame

ADF gear

Fig. 3-14

III-11

3.6 Scanner Rear Cover ASSY / Rear Cover ASSY

(1) Remove the two M4x12 tapping screws.
(2) Remove the CIS harness from the two hooks.
(3) Remove the scanner rear cover ASSY with the rear cover ASSY.

Scanner Rear Cover

Taptite, bind M4x12

Main Cover

Taptite, bind M4x12

Fig. 3-15

(4) Press the hinges at the right and left sides outwards to release the scanner rear

cover from the rear cover.

Scanner Rear Cover

Rear Cover

Fig. 3-16

III-12

Note:



When reassembling the scanner rear cover and the rear cover onto the printer, hook
the two hooks at the right and left hand sides (rear), then secure the two screws.



When replacing/reassembling the rear cover, remove the old grease and apply a
suitable amount of grease to the points shown in the figure below;

Rear Cover ASSY

Stopper spring

3.7 MP Rear Sheet Feeder ASSY

Caution:

When disassembling the MP rear sheet feeder ASSY, if you get grease on your fingers,
take care not to touch the separation pad or the paper pick-up roller, the grease will
spread to the paper and the drum unit. It might cause black spots to appear on the
printed page.

(1) Push the left rib outwards and pull out the MP rear sheet feeder. It is not

necessary to release the right rib.

Grease: Molykote EM­30L (1 rice-grain size)

Fig. 3-17

Multi-purpose Rear

Sheet Feeder

Rib

Fig. 3-18

III-13

Note:
When reassembling the MP rear sheet feeder, remove the old grease and apply a
suitable amount of grease (2 rice-grain size) between the heat sink of the motor and the
ground leaf spring. (Refer to the figure below.)

Ground leaf spring

Grease: FLOIL GE-676
(or FLOIL GE-334C)

Motor heat sink

6.2 mm

Fig. 3-19

3.8 Fixing Unit

(1) Remove the two M4x16 tapping screws.
(2) Lifting the fixing unit, disconnect the thermistor connector on the EL PCB first, then

the two heater harness connectors.

Taptite, cup M4x16

Thermistor connector

Fixing Unit

Taptite, cup M4x16

EL PCB

Thermistor harness

Heater harness (Brown)
Heater harness
(Blue)

Fig. 3-20

Note:
The eject sensor actuator may also be removed when removing the fixing unit. In this
case be sure to re-assemble the eject sensor actuator when re-assembling the fixing unit.

III-14

(3) Remove the two M3x12 tapping screws.

g

(4) Open the fixing unit cover along the open side of the fixing unit cover.

Fixing unit cover

Taptite, bind M3x12

Fixing unit

vr

Pressure roller

Fixin

unit frame

PR98292

Shaft

Fig. 3-21

(5) Release the right side of the paper eject roller shaft.
(6) Remove the four eject pinch rollers and the pinch springs from the fixing unit

frame. Then, remove the pinch spring from each pinch roller.

Paper eject roller shaft

Pinch Spring

Eject Pinch Roller

Fig. 3-21a

(7) Remove the M3x10 self tapping screw securing the connector plate.
(8) Remove the connector plate from the fixing unit frame and loosen the other M3x10

tapping screw securing the fixing unit cover.
(9) Remove the idle gear 16 from the fixing unit frame.
(10) Remove the heat roller gear, retaining ring, heat roller washer and heat roller

bearing. Then, remove the halogen heater lamp from the heat roller.

Caution :

Never touch the surface of the halogen heater lamp and the heat roller.

III-15

,

Heat Roller Bearing

Heat Roller Washer

Retaining ring

Heat roller gear

Taptite, pan M3x10

Connector plate

Note:







Halogen heater lamp
(Blue 100V, Red 200V)

Heat Roller Bearing

Groove

Idle gear 16

Heat roller

Taptite, pan
M3x10

Fixing unit frame

Fig. 3-22

When reassembling the heat roller bearings, ensure that the direction of the bearing is
correct referring to Fig. 3-22.
The heat roller itself is very similar to the one for HL-1060/1070 printers. The heat
roller for the MFC-P2000 / HL-P2000 printer can be distinguished by the groove on
the edge of the roller. (Refer to Fig. 3-22.)
When replacing the heat roller cleaner with a new one, attach the cleaner referring to
the figure below;

-1 mm ~ +1 mm
4 mm ~ 5 mm

Fig. 3-23



Follow the instructions below when installing the thermistor in the fixing unit.
i) Place the cleaner felt of the cleaner ASSY for the thermistor under the heat roller.
ii) Place the end of the thermistor on the heat roller.
iii) Insert boss1 of the thermistor into the hole of the fixing unit frame.
iv) Do no place the thermistor on boss2 of the fixing unit frame.

Boss2

Boss1

Cleaner ASSY for thermistor

Thermistor

Heat Roller

Fixing unit frame

Fig. 3-24

III-16

3.9 Laser Unit

(1) Remove the three M4x12 tapping screws.
(2) Lift out the laser unit.

Taptite, bind M4x12

Laser Unit

Main cover

Taptite, bind M4x12

Panel Sensor PCB

Fig. 3-25

Note:
When replacing the laser unit, be sure to assemble the ferrite core using the cable binder
as follows;

Ferrite Core

Cable binder

Flat cable

LD harness

Fig. 3-26

(3) Disconnect the three connectors from the panel sensor PCB.
(4) Remove the M3x8 tapping screw, and lift the toner sensor PCB from the laser unit.

III-17

Caution:



Do not open the enclosure of the laser unit.



Never touch the inside of the laser unit or the mirror when disassembling or
reassembling. If there is any dirt or dust on the mirror, blow it off.

Toner Sensor PCB

3.10 Main PCB ASSY

Taptite, cup M3x8

Laser Unit

Fig. 3-25

(1) Remove the three M4x6 screws.
(2) Hold the hooks at the left and right of the mounting frame to pull out the main PCB

ASSY slightly, and disconnect the three harnesses (R motor, sensor and CIS
harnesses).

(3) Remove the main PCB ASSY.

Sensor Harness

Main PCB ASSY

R Motor Harness

Screw, pan M4x6

Hook

Screw, pan M4x6

Fig. 3-28

CIS Harness

Hook

Caution:

When replacing the main PCB, be sure to implement the maintenance copy test. For
detailed operation of the test, see ‘9. Scanner Inspection Mode - A-3 Maintenance Copy
Test’ in Chapter IV.

III-18

3.11 Base Plate ASSY

y

Caution:

Prior to turning the printer upside-down, ensure that the drum unit has been removed
from the printer.

(1) Turn the printer upside down.
(2) Remove the eight M4 and five M3 self tapping screws.

Taptite, cup M3x6

Taptite, bind M4x12

Base plate ASSY

Taptite, bind M4x12

Taptite

, bind M4x12

Taptite, cup M3x6

Taptite, bind M4x12

Fig. 3-29

(3) Lift the base plate ASSY and remove the grounding screw.

Base Plate ASSY

Ground wire

Screw pan(washer),
M3.5x6

Fig. 3-30

Low-voltage Power
Suppl

PCB ASSY

III-19

3.12 Panel Sensor PCB ASSY

(1) Remove the main shield.
(2) Remove the M4x12 screw securing the panel sensor PCB ASSY.

Main shield

Taptite, bind M4x12

Panel Sensor PCB ASSY

Note:







Main shield

A

C

Panel Sensor PCB ASSY

B

Fig. 3-31

When reassembling the panel sensor PCB, ensure that you slide PCB A
underneath the main shield.
When reassembling the panel sensor PCB, ensure that you fit the PCB into hook B
and hook C first. Then fit the two bosses to the PCB and secure the screw.
Ensure that the three clamps fix the motor harness, panel harness and CIS harness
on the back of the main shield. Refer to the figure below;

Sensor Harness

Mini Clamp

R Motor Harness

Mini Clamp

CIS Harness

CIS Harness

Taptite, bind M4x12

Fig. 3-32

III-20

Nylon Clamp

Main Shield

(3) Disconnect the eight connectors from the PCB. (Three connectors have already

been disconnected when removing the laser unit.)

Panel Sensor

PCB ASSY

10

9

8

7

Main frame

1

2

3

5

4

Fig. 3-33

6

(Name of the Harnesses)

1. Low-voltage harness

2. Erase lamp harness

3. Toner harness

4. Scan motor flat cable

5. Laser harness

6. Solenoid harness

7. Main / sub motor connector

8. Fan motor 1 harness

9. Fan motor 2 harness

10. High-voltage flat cable

Note:



When re-assembling, the cable connectors must be inserted securely into the PCB
connectors and the PCB must not be stressed by the harnesses.



The connectors should be inserted by matching the housing color and the number of
pins.

3.13 Low-voltage Power Supply PCB ASSY

(1) Remove the one M4x12 tapping screw securing the low-voltage power supply PCB

ASSY.

(2) Disconnect the two connectors for the heater harness and the LV harness from the

PCB.

Low-voltage Power Supply ASSY

LV harness

Fig. 3-34

Hr hrn

III-21

(3) Remove the one M4x12 screw to remove the inlet holder. Then, remove the AC

inlet and the PCB.

Note:
When re-assembling the inlet holder and AC inlet, be sure to insert part A of the holder
into the hole of the ferrite core.

Inlet Holder

A

Main Cover

Fig. 3-35

3.14 High-voltage Power Supply PCB ASSY

(1) Remove the one M4x12 screw securing the high-voltage power supply PCB ASSY.
(2) Remove the film covering the PCB.
(2) Disconnect the HV flat cable from the PCB.

Taptite, bind

M4x12

AC Inlet

Ferrite core

High-voltage Power
Supply PCB ASSY

Insulation Sheet

HV flat cable

Main Cover

Fig. 3-36

III-22

3.15 Sub Fan Motor ASSY

(1) Slide the sub fan motor ASSY upwards .

Manufacturer sticker side

Main Cover

Note:
When re-assembling the sub fan motor, ensure that the side on which the manufacturers
sticker is attached is facing the main frame.

Sub Fan Motor

Fig. 3-37

3.16 Main Fan Motor ASSY

(1) Remove the two M4x12 screws securing the fan motor holder.
(2) Remove the fan motor holder from the printer.
(3) Remove the main fan motor ASSY from the fan motor holder.

Taptite, bind

M4x12

Fan Motor

Fan motor holder

Taptite, bind
M4x12

Manufacturer sticker side

Main frame

Fig. 3-38

III-23

Note:
When reassembling the fan motor into
the holder, refer to the figure on the
right.

3.17 Drive Unit

(1) Unhook the heater harness from the drive unit.

Fan motor holder

Fan Motor

Fig. 3-39

Heater harness

Drive Unit

Hook

Fig. 3-40

(2) Remove the three M4x20 and one M4x12 screws securing the drive unit.

Taptite, cup M4x20

Taptite, cup M4x12

Electrode DRB1

Fig. 3-41

Note:
When reassembling the drive unit, ensure you fit the drive unit underneath the electrode
DRB1.

III-24

3.18 Main Motor ASSY

(1) Remove the two M3x6 screws securing the main motor.
(2) Remove the main motor ASSY.

Taptite, bind M3x6

Drive Unit

3.19 Sub Motor ASSY

(1) Remove the two M3x6 screws securing the sub motor.
(2) Remove the sub motor ASSY.

Main Motor ASSY

Fig. 3-42

Taptite, bind M3x6

Fig. 3-43

III-25

Sub Motor ASSY

3.20 Document Support / Paper Support

(1) Pull the document support down toward you and pull both legs outwards to release

it.

Scanner Control Panel

Fig. 3-44

Document Support

(2) Pull the paper support down toward you and pull both legs outwards to release it.

Paper Support

MP Rear Sheet Feeder

Fig. 3-45

III-26

3.21 Extension Support Wire

(1) Raise the extension support wire toward you and press both legs inward to release

it.

Extension Support Wire

Output Tray

Fig. 3-46

3.22 Document Extension Support Wire

(1) Raise the document extension support wire toward you and press both legs inward

to release it.

Document Extension Support Wire

Top Cover

Fig. 3-47

III-27

4. PACKING

Accessory carton

Pad

Documents

Drum Unit

Printer

Carton

Ba

g

Pad

Fig. 3-48

III-28

CHAPTER IV MAI NTENANCE AND TROUBLESHOOTING

1. INTRODUCTION

1.1 Initial Check

(1) Operating environment

Check if :

• The source voltage stays within ±10% from the rated voltage shown on the rating
plate.

• The printer is installed on a solid, level surface.

• The room temperature is maintained between 10°C and 32.5°C. The relative
humidity is maintained between 20% and 80%.

• The printer is not located in a dusty place.

• The printer is not exposed to ammonia fumes or other harmful gases.

• The printer is not located in a hot or humid area (such as near water or a
humidifier).

• The printer is not exposed to direct sunlight.

• The room is well-ventilated.

• The printer is not placed where the ventilation hole of the printer is blocked.

(2) Print paper

Check if :

• A recommended type of print paper is being used. [If the paper is too thick or too
thin, or tends to curl, paper jams or paper feed problems may occur, or printed
images may be blurred.]

• The print paper is damped. [If so, use fresh paper, and check whether the print
quality improves or not.]

• The print paper is short-grained paper or acid paper. [If so, print quality problems
may occur. For further information, refer to paper specifications in Chapter II.]

(3) Consumable parts

Check if :

• The Toner lamp is not lit on the printer control panel when a toner cartridge is
installed in the printer. [If the lamp is lit, replace the cartridge with a new one. If
blank spots occur on printouts, take out the drum unit and slowly rock it to
redistribute the toner evenly.]

(4) Others

Condensation:
When the printer is moved from a cold room into a warm room in cold weather,

condensation may occur inside the printer, causing various problems as listed
below:

• Condensation on the optical surfaces such as the scanning mirror, lenses, the
reflection mirror and the protection glass may cause the print image to be light.

• If the photosensitive drum is cold, the electrical resistance of the photosensitive
layer is increased, making it impossible to obtain the correct contrast when
printing.

IV-1

• Condensation on the corona unit may cause corona charge leakage.

• Condensation on the hopper gate and separation pad may cause paper feed
troubles.

If condensation has occurred, wipe the effected units or parts with a dry cloth or leave the
printer for 2 hours to allow it to reach room temperature.

If the drum unit is unpacked soon after it is moved from a cold room to a warm room,
condensation may occur inside the unit, which may cause incorrect images. Instruct the
user to allow the unit to come to room temperature before unpacking it. This will take one
or two hours.

1.2 Basic Procedure

If a malfunction or incorrect print appears, make an initial check following the basic
procedure below:

(1) Check the error lamps following th e i n s p e c t i o n p r o c edure descr ibed later in

this chapter. If no error lamps are lit, see Section 4 for troubleshooting information.

(2) If any defective image output is found, follow the image defect fault descriptions in

this chapter.

2. MTBF / MTTR

The meantime between failure (MTBF) and the meantime to repair (MTTR) for this printer
are as follows;

MTBF: Up to 4,000 hours
MTTR: Average 30 minutes

IV-2

3. CONSUMABLE PARTS

3.1 Drum Unit

The Drum lamp is on when the drum unit is nearly at the end of its life.

Life expectancy: 20,000 pages at 20 pages per job

8,000 pages at 1 page per job

Note:
There are many factors that determine the actual drum life, such as temperature,

humidity, type of paper and toner that you use, the number of pages per print job, etc..

3.2 Toner Cartridge

Toner low: The Data and Alarm lamps blink once every five seconds.
Toner empty: The Data and Alarm lamps blink once a second.

Life expectancy: 2,400 pages/new toner cartridge

(when printing A4- or letter-size paper at 5% print coverage)

Note:
Toner cartridge life expectancy will vary depending on the type of average print job

printed.

3.3 Periodical Replacement Parts

No. Description Part No. Qty Service Life(page) Remarks

1

Fixing Unit UL8750001 1 50,000 120V

Fixing Unit UL8751001 1 50,000 230V

2 Laser Unit UL8748001 1 50,000 or more

3 MP rear sheet feeder ASSY UH3899001 1 50,000 or more

4 Separation Roller UU7031001 1 50,000

5 Separation Rubber UU7104001 1 50,000

Note:
The above table shows only estimated values. They are subject to change without prior

notice.

IV-3

4. IMAGE DEFECTS

Print out test print out test print out test Print out test print o

Print out test print out test print out test Print out test print o

Print out test print out test print out test Print out test print o

Print out test print out test print out test Print out test print o

Print out test print out test print out test Print out test print o

Print out test print out test print out test Print out test print o

Print out test print out test print out test Print out test print o

Print out test print out test print out test Print out test print o

Print out test print out test print out test Print out test print o

Print out test print out test print out test Print out test print o

Print out test print out test print out test Print out test print o

Print out test print out test print out test Print out test print o

Print out test print out test print out test Print out test print o

4.1 Image Defect Examples

I-2 DarkI-1 Light I-2 Dark I-3 Completely blank I-4 All black

I-5 Dirt on back of paper I-6 Black vertical

streaks

I-8 Black vertical
streaks

I-12 Image distortion

I-9 White vertical
streaks

Print out test print out test print out test Print out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print o

I-13 Faint print I-14 White spots

I-6 Black vertical
streaks

I-10 Faulty

registration

Print out test print o

Print out test print o

Print out test print o

Print out test print o

Print out test print o

Print out test print o

Print out test print o

Print out test print o

Print out test print o

Print out test print o

Print out test print o

Print out test print o

Print out test print o

I-7 Black horizontal
stripes

I-11 Poor fixing

I-15 Black spots

I-16 Black band

I-20 Horizontal lines

I-17 Gray background I-18 I-19 Downward fogging

Hollow print

of solid black

I-21 Light rain

I-22 Ghost

Fig. 4-1

IV-4

4.2 Troubleshooting Image Defects

The following procedures should be followed in the event of specific image defects.

Before you can establish the cause of an image defect you need to identify whether the
image defect you have got comes from the scanning side or the printing side to take the
appropriate action.

Implement both direct copying and printing from the printer itself (ex. test print), and find
which causes the defect referring to the table below;

Cause Copying result Printing result

Scanning side
Printing side

= No good ❍ = OK

✕

Also, see subsection 3.3 and 3.4 for information about the location of the high-voltage
contacts and grounding contacts.

Caution:

Print quality cannot be guaranteed in the following cases;



When using the printer for a special job, such as printing of name cards.



When printing much narrower paper than the printable paper width.



When printing on one area of the paper continuously even though Letter or A4 size
paper is used.

✕❍
✕✕

IV-5

I-1 Light

<Scanning >

Possible cause Step Check Result Remedy

Main PCB
failure

Laser unit failure 2 Is the problem solved after the

<Printing>

Possible cause Step Check Result Remedy

Toner sensing
failure
(printer side)

Toner sensing
failure
(toner cartridge
side)

Drum
connection
failure

High-voltage
power supply
PCB failure

Panel sensor
PCB or main
PCB failure

Laser unit failure 6 Is the problem solved by

1 Is the problem solved after the

main PCB is replaced?

laser unit is replaced?

1 Can printing be started with the

drum unit removed?

2 Is the problem solved when 4

or 5 pages are printed after the
toner cartridge is replaced with
a full one?

3 Are all the contacts (HV, GND)

connected when the drum unit
is installed?

4 Check the harness connection

between the high-voltage
power supply PCB and the
panel sensor PCB.

5 Perform the same check as

step 4 above and also between
the panel sensor PCB and the
main PCB.

replacing the laser unit?

Yes Replace the main PCB.

Yes Replace the laser unit.

Yes Toner sensor failure.

Check if the toner
sensor needs
cleaning and check
the toner sensor
connection.

Yes The wiper of the

toner cartridge is
defective, or replace
the toner cartridge.

No Clean contact

electrodes both in the
printer body and on
the drum unit.

No If the connection is

normal, replace the
high-voltage power
supply PCB.

No Replace the panel

sensor PCB or the
main PCB.

Yes Replace the laser

unit.

GND
contacts
(Fig.4-5)

➀

IV-6

I-2 Dark

<Scanning>

Possible cause Step Check Result Remedy

Main PCB
failure

Laser unit failure 2 Is the problem solved after the

<Printing>

Possible cause Step Check Result Remedy

Corona failure
(soiled wire)

Corona failure
(contact failure)

Drum unit failure 3 Is the problem solved when the

High-voltage
power supply
PCB

Main PCB 5 Are there any disconnected

1 Is the problem solved after the

main PCB is replaced?

laser unit is replaced?

1 Is the corona wire dirty? Yes Clean the corona wire

2 Are the corona electrodes

between the printer body and
drum unit dirty?

drum unit is replaced?

4 Are there any disconnected

connectors?

connectors?

Yes Replace the main PCB.

Yes Replace the laser unit.

by using the wire
cleaner.

No Clean both electrodes.

Yes Replace the drum

unit with a new one.

No Replace the high-

voltage power supply
PCB.

No Replace the main

PCB.

GND
contacts
(Fig.4-5)

➇

➅

Panel sensor
PCB

6 Are there any disconnected

connectors?

IV-7

No Replace the panel

sensor PCB.

I-3 Completely blank

<Scanning>

Possible cause Step Check Result Remedy

CIS harness
connection

CIS unit failure 2

1 Is the CIS harness connected

securely?
Is the problem solved after the

CIS unit is replaced?

No Reconnect the CIS harness.

Yes

Replace the CIS unit.

Sensor harness
connection

Main PCB
failure

<Printing>

Possible cause Step Check Result Remedy

Developing bias
contact failure

Drum unit 2 Are the drum shaft and drum

Drum unit failure 3 Is the problem solved after the

Scanner harness
connection failure

Main / Panel
sensor PCB
connection failure

Laser unit failure 6 Laser interlock lever damaged. Yes Replace the laser

3 Is the sensor harness

connected between the main
PCB and the scanner sensor
PCB securely?

4 Is the problem solved after the

main PCB is replaced?

1 Are the developing bias

contacts between the printer
body and drum unit dirty?

electrode of the printer body
connected correctly?

drum unit is replaced?

4 Is the scanner harness

connected securely?
Is there any play in the

connection?

5 Are printing signals being input

to the scanner?
Is the problem solved after the

main PCB or the panel sensor
PCB replaced?

Laser mirror is broken or loose. No Replace the high-

No Reconnect the sensor harness.

Yes Replace the main PCB.

Yes Clean the electrodes

at both sides.

Yes Clean the shaft and

the electrode.

No Check the connection

between the shaft and
the electrode.

Yes Replace the drum

unit.

No Reconnect the

connector properly.

Yes Replace the main

PCB or the panel
sensor PCB.

unit.

voltage power supply
PCB.

GND
contacts
(Fig.4-5)

➆
➀

➀

IV-8

I-4 All black

<Scanning>

Possible cause Step Check Result Remedy

CIS harness
connection

CIS unit failure 2 Is the problem solved after the

Sensor harness
connection

Main PCB
failure

<Printing>

Possible cause Step Check Result Remedy

Corona failure 1 Is the corona wire of the drum

Harness
connection

1 Is the CIS harness connected

securely?

CIS unit is replaced?

3 Is the sensor harness

connected between the main
PCB and the scanner sensor
PCB securely?

4 Is the problem solved after the

main PCB is replaced?

unit broken?

2 Are the electric terminal

springs in the printer body and
the electrode on the bottom
face of the drum unit dirty?

3 Is the laser unit connected with

the panel sensor PCB
correctly?

No Reconnect the CIS harness.

Yes Replace the CIS unit.

No Reconnect the sensor harness.

Yes Replace the main PCB.

Yes Replace the drum

unit.

Yes Clean the terminals

in the printer and on
the drum.

No Check the harness

connection between
the laser unit and the
panel sensor PCB.

GND
contacts
(Fig.4-5)

➅

High-voltage
power supply
PCB

Ditto 5 Perform the same check as in

Main PCB 6 Is the problem solved after

Panel sensor
PCB

4 Is the problem solved after

high-voltage power supply
PCB replaced?

step 3.

main PCB is replaced?

7 Is the problem solved after the

panel sensor PCB is replaced?

IV-9

Yes Replace the high-

voltage power supply
PCB.

Yes Replace the panel

sensor PCB.

Yes Replace the main

PCB.

Yes Replace the panel

sensor PCB.

I-5 Dirt on the back of paper

<Printing>

Possible cause Step Check Result Remedy

Fixing unit 1 Is the pressure roller dirty?

Is any other area in the printer
dirty?

Dirt in the drum
unit

2 Is the transfer roller dirty?

Is the problem solved after the
drum unit is replaced?

Note: Clean the pressure roller as follows;

(1) Set three or more sheets of paper in the MP sheet feeder.
(2) Open the top cover.
(3) Turn on the power switch while holding down the switch on the printer control

panel.
(4) Release the panel switch when the Drum lamp is on.
(5) Close the top cover.
(6) Hold down the panel switch until the Ready lamp is on, then release the

switch.
(7) Print three patterns; grid, zip and solid black.
(8) Turn off the power switch with the top cover closed.
(9) Set paper in the manual slot with the solid black side up.
(10) Turn on the power switch while holding down the switch on the control panel.
(11) Release the panel switch when the Drum lamp is on.
(12) Press the panel switch again and release it immediately.
(13) Print a page of test pattern while cleaning the pressure roller.

Yes Clean the pressure roller.

(See the following note.)

Yes Replace the drum unit

No Replace the high-voltage

power supply PCB.

IV-10

I-6 Black and blurred vertical streaks

<Scanning>

Possible cause Step Check Result Remedy

Stains on the
CIS window

Dirt on the
document
pressure bar

Scratch on the
document
pressure bar

<Printing>

Possible cause Step Check Result Remedy

Corona failure 1 Is the corona wire dirty? Yes Clean the corona

Corona failure 2 Is the vertical block streak

Dirt in the paper
feed system

Scratch on the
drum
Cleaning failure 5 Is the drum surface dirty with

Scratch on the
heat roller

1 Are there any stains on the

CIS window?

2 Is the document pressure bar

dirty?

3 Are there any scratches on the

document pressure bar?

about 10 mm wide?
Is the corona wire cleaner not
in its home position?

3 Is the paper tray or feed

system on the drum unit soiled
with toner?

4 Is the drum surface scratched? Yes Replace the drum

toner in streaks?

6 Is the surface of the heat roller

scratched?

Yes Clean the CIS window.

Yes Clean the document pressure

bar.

Yes Replace the document

pressure bar.

wire with the wire
cleaner.

Yes Return the wire

cleaner to its home
position.

Yes Clean the toner off.

unit.

Yes Replace the drum

unit.

Yes Replace the fixing

unit.

GND
contacts
(Fig.4-5)

➇

Note:
If you print the same pattern continuously, the drum will be worn and black vertical
streaks will appear on the paper.

IV-11

I-7 Black and blurred horizontal stripes

<Printing>

Possible cause Step Check Result Remedy

Scratch on the
drum

Toner stuck on
the developer
roller

Scratch on the
fixing roller

High-voltage
power supply
PCB

1 Are the horizontal stripes at 94

mm (photosensitive drum)
intervals?

2 Are the horizontal stripes at 25

mm (developer roller)
intervals?

3 Are the horizontal streaks at 63

mm (heat roller) intervals?

4 Is the problem solved after the

high-voltage power supply
PCB is replaced?

Yes Replace the drum unit.

Yes Print several sheet and see

what happens.
The problem will disappear
after a while. If not, replace the
drum unit.

Yes Replace the fixing unit.

Yes Replace the high-voltage

power supply PCB.

I-8 Black vertical streaks (in a gray background)

<Scanning>

Possible cause Step Check Result Remedy

Stains on the
CIS window

CIS unit failure 2 Is the problem solved after the

<Printing>

Possible cause Step Check Result Remedy

Translucent
stain on the
laser scanner
window

1 Are there any stains on the

CIS window?

CIS unit is replaced?

1 Are there any stains on the

laser scanner window?

Yes Clean the CIS window.

Yes Replace the CIS unit.

Yes Clean the laser scanner

window.
If it is not effective, replace the

laser unit.

IV-12

I-9 White vertical streaks

<Scanning>

Possible cause Step Check Result Remedy

Stains on the
CIS window

CIS unit failure 2 Is the problem solved after the

Dirt on the
document
pressure bar

Scratch on the
document
pressure bar

<Printing>

Possible cause Step Check Result Remedy

Laser scanner
window dirty

Transfer failure 2 Is the transfer roller scratched? Yes Replace the drum unit.

1 Are there any stains on the

CIS window?

CIS unit is replaced?

3 Are there any dirt on the

document pressure bar?

4 Are there any scratches on the

document pressure bar?

1 Is the scanner window dirty? Yes Clean the scanner window with

Yes Clean the CIS window.

Yes Replace the CIS unit.

Yes Clean the document pressure

bar.

Yes Replace the document

pressure bar.

a dry tissue.

I-10 Faulty registration

<Printing>

Possible cause Step Check Result Remedy

Excessive paper
load

Print paper 2 Is the specified weight of the

Ditto 3 Is the first printing position

Paper registration
sensor position
incorrect

1 Is the paper loaded in the

paper feeder more than 22 mm
deep?

recommended paper being
used?

within ±1 mm of the tolerance
specification?

4 Is the position of the paper

registration sensor normal?

IV-13

Yes Instruct the user to keep paper

loads below 22 mm in depth.

No Instruct the user to use the

recommended types of paper.

Yes Adjust the Y offset by using the

utility software supplied.

No Reposition the sensor to the

correct position.

I-11 Poor fixing

<Printing>

Possible cause Step Check Result Remedy

Printing paper 1 Is thick paper of more than 42

lb. weight in use?

Toner sensing
failure

Thermistor
failure

Low-voltage
power supply
PCB failure

2 Is the problem solved by

replacing the drum unit or the
toner cartridge?

(When printing is faint.)

3 Is the thermistor fitted

correctly?

4 Is the problem solved by

replacing the low-voltage
power supply PCB?

Yes Instruct the user to use paper

of the recommended weight
and thickness.

Yes Toner is empty.

The toner sensing is defective,
clean the toner sensor.

If the wiper in the toner
cartridge is broken, replace the
toner cartridge with a new one.

No Fit the thermistor correctly.

Yes Replace the low-voltage power

supply PCB.

IV-14

I-12 Image distortion

<Scanning side>

Possible cause Step Check Result Remedy

Separation roller
failure

Document feed
roller failure

Scanner motor
failure

Main PCB
failure

<Printing>

Possible cause Step Check Result Remedy

Laser unit 1 Is the laser unit secured to the

LD emission
failure

1 Do the separation roller and its

related sections work
correctly?

2 Do the document feed roller

and their related gears work
correctly?

3 Does the scanner motor work

correctly?
Is the scanner motor harness

connected securely?

4 Is the problem solved after the

main PCB is replaced?

frame incorrectly?
Is there any play?

2 Is the laser diode or the laser

scanner motor defective?

No Replace the separation roller

or its related parts.

No Replace the document feed

rollers or their related gears.

No Replace the scanner motor, or

reconnect the scanner motor
harness correctly.

Yes Replace the main PCB.

Yes Secure the unit correctly and

tighten the screws.

Yes Replace the laser unit.

Laser motor
rotation failure

Laser scanner
connection
failure

3 Is the scanner harness

connected properly?
Is it coming loose?

IV-15

Yes Connect the harness correctly.

I-13 Faint print

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print oPrint out test print o

Print out test print out test print out test Print out test print oPrint out test print o

<Printing>

Possible cause Step Check Result Remedy

Printer not level 1 Is the printer placed

horizontally?

Drum unit 2 Does the problem happened

immediately after replacing the

No Place the printer on a flat

surface.

Yes Remove and carefully shake

the drum unit horizontally.

drum unit with a new one?

Laser scanner
window dirty

Laser unit failure 4 Is the problem solved by

3 Is the window of the laser

scanner dirty?

Yes Clean the window with a dry

tissue.

Yes Replace the laser unit.

replacing the laser unit?

I-14 White spots

<Printing>

Possible cause Step Check Result Remedy

Toner cartridge 1 Is the toner in the toner

cartridge almost empty?

Print paper 2 Is the problem solved after

change to specified of fresh
unpacked paper?

Environment 3 Check if the problem still

appears after the printing has
warmed up.

IV-16

Yes Shake the drum unit

horizontally. Replace the toner
cartridge with a new one.

No Replace the drum unit.

Yes Recommend the user to

change the paper.
(Damp (wet) paper might be

used.)

Yes Replace the drum unit.

Advise the user of the
specified print environment.

I-15 Black spots

<Printing>

Possible cause Step Check Result Remedy

Drum unit 1 Are the spots at 94 mm

intervals?
The problem is not solved after

printing a few pages.

Fixing unit 2 Are the spots at 63 mm

intervals?
The problem is not solved after

printing a few pages.

High-voltage
power supply
PCB

3 Is the problem solved after the

high-voltage power supply
PCB is replaced?

Yes If toner remains stuck, wipe it

off gently with a cotton swab.
Replace the drum unit if the

photosensitive drum is
scratched or deteriorated
(exposed).

(Refer to the following note.)

Yes Check and clean the heat roller

with a cloth dampened with
alcohol.

Replace the fixing unit.

Yes Replace the high-voltage

power supply PCB.

Note: Clean the drum unit as follows:

(1) Place the printing samples in front of the process unit, and find the exact

position of the image defect.

Position of smudge on
the drum

94 mm interval

Fig. 4-2

(2) Turn the drum gear by hand while looking at the surface of the photosensitive

drum.

Fig. 4-3

IV-17

(3) Wipe the surface of the photosensitive drum with a cotton swab until the dust

g

or paper powder on the surface comes off.

Paper path

Cleaning roller

Photosensitive drum

Fig. 4-4

Toner cartrid

Separator

e

Caution:



Do not wipe the surface of the photosensitive drum with something sharp. (ball-point
pen etc.)



Use cleaning liquid which is a 50-50 mixture of ethyl alcohol and pure water.

I-16 Black band

<Printing>

Possible cause Step Check Result Remedy

Drum unit 1 Is the wire cleaner positioned

at its home position?

Ditto 2 Is the corona wire dirty? Yes Clean the corona wire.

No Return the wire cleaner to its

home position.

If the problem still appears
after cleaning, replace the
drum unit.

IV-18

I-17 Gray background

Note:
This problem may appear on the first 10 to 20 pages immediately

after replacing the toner cartridge.

<Printing>

Possible cause Step Check Result Remedy

Print paper 1 Does the paper being used

meet the paper specification
(weight, etc.)?

Drum unit 2 Is the problem solved after

replacing the drum unit?

Note: The following cases increase the possibility of this problem.

1) The drum unit is at the end of its life.

2) There is dust or paper powder.

3) A large amount of paper whose width is narrower than A4 is printed.

4) Acid paper is being used.

I-18 Hollow print

No Recommend to change the

paper to a specified type of the
paper.

Yes Recommend to change the

paper to a fresh pack paper.

Yes Replace the drum unit.

No Replace the high-voltage

power supply PCB.

<Printing>

Possible cause Step Check Result Remedy

Print paper 1 Is thick paper of more than 42

lb. being used or extremely
rough surface paper?

IV-19

Yes Recommend to use the

specified type of paper.

No Refer and compare with I-14.

I-19 Downward fogging of solid black

<Printing>

Possible cause Step Check Result Remedy

Drum unit 1 Is the problem solved after

replacing the drum unit?

High-voltage
power supply
PCB

2 Is the problem solved after

replacing the high-voltage
power supply PCB?

Yes Replace the drum unit.

Yes Replace the high-voltage

power supply PCB.

I-20 Horizontal lines

<Printing>

Possible cause Step Check Result Remedy

SR electrode 1 Are the SR electrodes

between the printer body and
the drum unit dirty?

Yes Clean both electrodes.

GND
contacts
(Fig.4-5,

4-7)

➈

SR connection
failure

Feed roller 3 Are the feed roller shaft and

2 Are the SR electrodes

between the printer body and
the drum unit connected
correctly?

the ground contact
connected correctly?

IV-20

No Check the SR

connection.

No Check the connection

between the shaft and
the ground contact.

➉

I-21 Light rain

<Printing>

Possible cause Step Check Result

Remedy

Drum unit failure 1 Is the problem solved after

replacing the drum unit with
one that does not contain a
starter sheet**?

High-voltage
power supply
PCB failure

2 Is the problem solved after

replacing the high-voltage
power supply PCB?

**Note:
Make sure to use a used drum unit which has already ejected the starter sheet. It is not

possible to find a drum unit failure if you use a new drum unit with a starter sheet in it.

I-22 Ghost

Yes Replace the drum unit.

Yes Replace the high-voltage

power supply PCB.

<Printing>

Possible cause Step Check Result

Driver setting 1 Is thin paper such as 64g/m

2

used under the thick paper
mode?

IV-21

Remedy

Yes Change the current mode to

the normal mode from the
driver setting.

Print 5 or 6 blank pages if this
problem occurs.

4.3 Location of High-voltage Contacts and Grounding Contacts

Grounding contacts

➀

➈

pp

➁

Grounding wire

Drum unit

For supply roller

➂

For transfer

roller

➃

For cleaning

roller

Fig. 4-5

High-voltage contacts

➆

For development

➇

Wire cleaner

➄

➅

For development
roller

roller

For supply roller

For transfer
roller

For cleaning
roller

For corona wire

For grid

For cleaning roller

For transfer roller

For corona wire

For development
roller

For grid

Fig. 4-6

IV-22

4.4 Location of Feed Roller Shaft and Grounding Contacts

Feed roller shaft

Fig. 4-7

➉

For paper feed roller

IV-23

5. DOCUMENT FEEDING PROBLEM

Caution:

When a document jam occurs, pressing the Stop key will eject the jammed document. If
the document is not ejected, open the scanner panel cover to remove it.

Problem Possible cause Check Result

‘1’ is indicated on
the LED although
no documents are
set.

Or, ‘1’ is not
indicated on the
LED although
documents are set.

Documents are not
fed.

Documents are
double-fed.

Scanner sensor
failure

Document
front/rear sensor
actuators failure

Main PCB failure Is the problem solved

ADF failure Does the ADF and its

Scanner motor
failure

Document feed
roller failure

Main PCB failure Is the problem solved

Document
thickness

ADF parts failure Do the ADF feed parts

Scanner panel
cover

Check the sensor works
correctly by using the
factory inspection
program mode.

Do the document
front/rear sensor
actuators work
correctly?

after the main PCB is
replaced?

related parts (especially
the separation rubber)
work correctly?

Does the scanner motor
work correctly? Is the
scanner motor harness
connected securely?

Do the document feed
rollers and their related
gears work correctly?

after the main PCB is
replaced?

Does the document
meet the document
specification (thickness,
etc.)? Are more
documents than the
maximum number set in
the ADF?

(especially the
separation rubber) work
correctly?

Is a document set with
the panel cover opened?

Remedy

No Replace the scanner

sensor PCB.

No Replace the

document front/rear
sensor actuators.

Yes Replace the main

PCB.

No Replace the defective

ADF related parts.

No Replace the scanner

motor or reconnect
the scanner motor
harness securely.

No Replace the defective

document feed roller
or gear.

Yes Replace the main

PCB.

Yes Set the specified type

and number of
documents.

No Replace the defective

ADF parts.

Yes Re-set the document

with the panel cover
closed.

IV-24

Problem Possible cause Check Result

Recording paper is
not fed.

MP rear sheet
feeder failure

Does the MP rear sheet
feeder work correctly?

Drum unit failure Is the problem solved

after the drum unit is
replaced?

Fixing unit failure Is the problem solved

after the fixing unit is
replaced?

Drive unit failure Is the problem solved

after the drive unit is
replaced?

Main PCB failure Is the problem solved

after the main PCB is
replaced?

Remedy

No Replace the MP rear

sheet feeder.

Yes Replace the drum

unit.

Yes Replace the fixing

unit.

Yes Replace the drive

unit.

Yes Replace the main

PCB.

IV-25

6. PAPER JAM

Problem Type of jam Cause Temp measure

Jam at power on Paper stuck Paper feed sensor or

paper eject sensor is
turned on.

Top of paper stopped
at 20 mm from the
fixing unit.
Paper feed roller
rotated twice.
Top of paper stopped
at 250 mm from the
fixing unit.
Next paper is not fed.
Top paper stopped at
the paper feed roller.

Paper was fed approx.
20 mm from the
transfer roller.

Top of paper stopped
at 17 mm from the
contact point of the
heat roller and
pressure roller.
Top of paper stopped
at 35 mm from the
contact point of the
heat roller and
pressure roller.
Jam occurred after
ejecting paper.
Top of paper stopped
at 20 mm from the
fixing unit.

No paper Paper feed sensor is

not turned on.

Jam caused by paper
length detected as
longer than 400 mm
(16 inches).
Jam caused by paper
length detected as
shorter than 80 mm.

Jam caused by a paper
feed delay.

Jam caused by the
paper sensed as not
being ejected from the
paper eject sensor.

Jam caused by the
paper sensed as not
being ejected from the
paper feed sensor.

Same as above. Same as above.

1. Cover open

2. Bug

Paper feed sensor is
not returning properly,
and is not turned off.

Paper feed sensor
was turned off early.
Malfunction of
actuator or hardware
noise.
Due to paper dust or
wear of the rubber
paper feed roller,
paper was not fed in
at the proper timing.
Paper eject sensor
does not work
properly and is not
turning off.
(single printing)
Paper feed sensor is
not turning on.

(continuous printing)

1. Cover is not closed
properly.

2. Bug

Remove the paper inside
the printer. If there is no
paper, check the
suspect sensors
referring to the note
below and clear the
problem.
Check paper feed
sensor motion referring
to the note below and
clear the problem.

Check paper feed
sensor motion referring
to the note below and
clear the problem.
Check sensors referring
to the note below and
clear the cause of the
problem.

Remove the paper dust
attached to the paper
feed roller. If the rubber
is worn out, replace it
with new one.
Check the sensor motion
referring to the note
below and clear the
problem.

Check the sensor motion
referring to the note
below and clear the
problem.

Same as above.

1. Check if the drum unit
is installed correctly.

2. Please inform BIL.

Note: How to check the sensors

(1)Open the cover.
(2)Turn on the printer power switch while pressing the panel switch.
(3)Release the panel switch.
(4)Press and release the panel switch.
Results:
*Alarm Lamp is ON = Paper feed sensor is turned ON
*Drum Lamp is ON = Paper eject sensor is turned ON

IV-26

7. TROUBLESHOOTING MALFUNCTIONS

When carrying out countermeasures for malfunctions as described in this section, check
connectors for contact failure before measuring the voltage at the specified connector
pins.

7.1 Printer Malfunctions

M-1 No AC power supplied

Possible cause Step Check Result Remedy

Supply voltage 1 Is the correct voltage present

at the outlet?

Power plug 2 Is the power cord securely

plugged into the outlet?

Fuse (F1, F2) 3 Is the fuse blown? Yes If the fuse blows again

Wiring 4 Unplug the power supply plug.

Is there a broken wire between
the AC input connector of the
low-voltage power supply and
the power plug?

No Inform the user that the correct

voltage is not supplied at the
outlet.

No Plug the power cord securely

into the outlet.

immediately after replacing the
low-voltage power supply PCB,
check that there is not a short
circuit somewhere in the AC
power supply line.

Yes Replace the AC power cord.

M-2 No DC power supplied

Possible cause Step Check Result Remedy

AC power
supply

1 Is AC power supplied between

connectors CN1-L and CN1-N
when the power plug is
plugged into the outlet?

Wiring, DC load 2 Turn the power switch OFF

and disconnect the P13
connector (panel sensor PCB).

Turn the power switch ON
again. Measure the voltages
between the terminals.

Do the measured voltage
satisfy the prescribed value in
the table below?

Low-voltage
power supply
PCB

PCB + lead pin - lead pin Voltage

Panel

Sensor

P8-1 P8-4 Approx. 24V

P8-2 P8-3 Approx. 5V

Caution:
If you analyze malfunctions with the power plug inserted into the power outlet, special

caution should be exercised even if the power switch is OFF because it is a single pole
switch.

No Follow the same check

procedure of M-1 “No AC
power supplied”.

Yes Turn the power switch OFF,

reconnect the connector and
turn the power switch ON
again.

If the protector circuit is
activated, check the connector,
the wiring from the connector,
and the DC load.

No Replace the low-voltage power

supply PCB.

IV-27

M-3 Main motor unrotated

Possible cause Step Check Result Remedy

Failure of
connector

Main motor (M1) 2 Disconnect connector P9 from

1 Is the connection of connector

P9 on the panel sensor PCB
correct?

the panel sensor PCB.
Measure the resistance
between the connector pins of
the main motor by using a
circuit tester.

Do the measured resistances
satisfy the prescribed values in
the table below?

P9-5 and P9-6
P9-7 and P9-8

Approx.4.5
Approx.4.5

No Reconnect the connector.

No Replace the main motor.

Main PCB 3 Is the problem solved by

Yes Replace the main PCB.

replacing the main PCB?

Sub motor
unrotated

4 Disconnect connector P9 from

the panel sensor PCB.

No Replace the sub motor.

Measure the resistance
between the connector pins of
the main motor by using a
circuit tester.
Do the measured resistances
satisfy the prescribed values in
the table below?

P9-1 and P9-2
P9-3 and P9-4

Approx.9.1
Approx.9.1

M-4 No paper supplied

Possible cause Step Check Result Remedy

Connection
failure

Panel sensor
PCB circuit

Paper pick-up
clutch solenoid

MP tray unit
failure

Main PCB 4 Is the problem solved by

1 Is the contact of connector P3

on the panel sensor PCB
good?

2 Set paper in the paper feeder

and make a test print by
pressing the switch on the
printer control panel.

Does the voltage between pins
2 (SOLENOID) and 1 (24V) of
the P3 connector on the panel
sensor PCB change from
approx. 24V DC to 0V within
the specified time?

3 Is the surface of the separation

pad or the pick up roller
stained or worn out?

replacing the main PCB?

No Reconnect the connector.

No Replace the panel sensor

PCB.

Yes Replace the paper pick-up

solenoid.

Yes Clean the surface or replace.

Yes Replace the main PCB.

IV-28

M-5 Insufficient output from high-voltage power supply unit

Possible cause Step Check Result Remedy

High-voltage
contact

1 Do any of the terminals on the

high-voltage contacts have dirt
or contact burns?

2 Check the connections of the

harness between the high­voltage power supply and the
panel sensor PCB are secured
correctly.

Yes Clean the high-voltage contact.

Yes Replace the high-voltage

power supply PCB.

No Reconnect the harness

between the high-voltage
power supply and the panel
sensor PCB.

M-6 Fixing heater temperature failure

Possible cause Step Check Result Remedy

Poor thermistor
harness contact

Blown thermal
fuse

1 Are the connectors on the

erase lamp PCB and the high­voltage power supply PCB
secured correctly?

2 Remove the fixing unit and

measure the resistance
between the input connectors.

No Connect the connectors

securely.

Yes Replace the fixing unit.

Is it open circuit?

Thermistor
failure

Halogen heater
lamp failure

3 Is the thermistor installed

properly?

4 Remove the fixing unit and

measure the resistance of the
fixing unit lamp. Is it open
circuit?

Yes Replace the fixing unit.

No Reinstall the thermistor

properly.

Yes Replace the halogen heater

lamp.

M-7 BD failure

Possible cause Step Check Result Remedy

Harness
connection
failure

1 Is connector P2 on the panel

sensor PCB secured correctly?

No Connect it securely.

IV-29

M-8 Laser unit failure

Possible cause Step Check Result Remedy

Harness
connection
failure

Power supply
input

1 Is the connection of the

scanner motor connector P5
on the panel sensor PCB
secure?

2 Is the voltage between pins 1

(+24VDC) and 2 (GND) of
connector P5 on the panel
sensor PCB 24VDC?

No Reconnect the connectors

securely.

No Check if +24VDC is supplied

between pins 1 (+24VDC) and
4 (+24VRET) of connector P8
on the panel sensor PCB. If
not, check the power supply
output on the low-voltage
power supply PCB.

Yes Replace the laser unit.

IV-30

F-1 Double feeding

Possible cause Step Check Result Remedy

Paper 1 Is paper of a recommended

type being used?

Separation pad 2 Is the surface of the separation

pad worn out?

No Instruct the user to use

recommended types of paper.

Yes Replace the MP sheet feeder.

F-2 Wrinkles

Possible cause Step Check Result Remedy

Paper 1 Is paper of a recommended

type being used?

2 Is the wrinkle problem solved if

new paper is used?

Fixing unit
entrance guide

Fixing unit 4 Is the pressure roller dirty? Yes Clean the pressure roller

3 Is the entrance guide dirty? Yes Clean the entrance guide.

No Instruct the user to use the

recommended types of paper.

Yes Instruct the user how to store

paper so that it does not
absorb moisture.

No Replace the fixing unit.

IV-31