Brother MFC 7150C User manual

FACSIMILE EQUIPMENT
SERVICE MANUAL
MODEL: MFC7150C/MFC7160C/
MFC-740

PREFACE
This publication is a Service Manual covering the specifications, construction, theory of operation,
and maintenance of the Brother facsimile equipment. It includes information required for field
troubleshooting and repair--disassembly, reassembly, and lubrication--so that service personnel
will be able to understand equipment function, to rapidly repair the equipment and order any
necessary spare parts.
To perform appropriate maintenance so that the facsimile equipment is always in best condition
for the customer, the service personnel must adequately understand and apply this manual.
This manual is made up of six chapters and appendices.
CHAPTER I.GENERAL DESCRIPTION
CHAPTER II.INSTALLATION
CHAPTER III.THEORY OF OPERATION
CHAPTER IV.DISASSEMBLY/REASSEMBLY, LUBRICATION AND ADJUSTMENT
CHAPTER V. MAINTENANCE MODE
CHAPTER VI. ERROR INDICATION AND TROUBLESHOOTING
APPENDICES CIRCUIT DIAGRAMS
This manual describes the model and its versions to be destined for major countries. The specifications and
functions are subject to change depending upon each destination.

CHAPTER IV.
DISASSEMBLY/REASSEMBLY,
LUBRICATION AND ADJUSTMENT

i
CONTENTS
1. DISASSEMBLY/REASSEMBLY ..........................................................................IV-1
Safety Precautions..............................................................................................IV-1
Tightening Torque List........................................................................................IV-2
Preparation.........................................................................................................IV-4
How to Access the Object Component ...............................................................IV-4
Disassembly Order Flow.....................................................................................IV-5
1.1 Ink Cartridges ................................................................................................IV-6
1.2 Print Head Unit ..............................................................................................IV-8
1.3 Bin .................................................................................................................IV-12
1.4 ROM Cover ...................................................................................................IV-13
1.5 Control Panel ASSY ......................................................................................IV-14
1.6 Panel Rear Cover and Control Panel .............................................................IV-15
1.7 Document Feed Roller ASSY and Document Ejection Roller ASSY ...............IV-18
1.8 Front Cover and Battery ASSY* (*MFC7160C/MFC-740 only)..................................IV-19
1.9 Cover R, Speaker, and Inner Cover R ...........................................................IV-20
1.10 Cover L, Handset Mount, VC Cover* and Inner Cover L (*French version only)......IV-24
1.11 Top Cover .....................................................................................................IV-27
1.12 Scanner Frame ASSY ...................................................................................IV-31
1.13 Star Wheel Holder ASSY ...............................................................................IV-36
1.14 Platen and Its Frame .....................................................................................IV-37
1.15 Flushing Foams .............................................................................................IV-38
1.16 Rear Cover ....................................................................................................IV-39
1.17 Ink Absorbers ................................................................................................IV-40
1.18 Frame Cover, Purge Lever Cover, Cover Sensor Actuator 2,
and Paper Pressure Holders ..........................................................................IV-41
1.19 Paper Feed Gear L, PF Timing Belt, Idle Gear 720, and Tension
Plate ASSY ...................................................................................................IV-46
1.20 Gear Cover, Gear Frame ASSY (with Solenoid), and PF Arm ASSY .............IV-48
1.21 Paper Feed Roller .........................................................................................IV-51
1.22 Bottom Plate, Power Supply PCB, and Video PCB ........................................IV-52
1.23 NCU PCB and Main PCB ..............................................................................IV-57
1.24 Sensor Actuators (Cover Sensor Actuator 1, Paper Width Sensor
Actuator, Paper Ejection Sensor Actuator, Bin Cover Sensor Actuator,
and Registration Sensor Actuator) .................................................................IV-61
1.25 Purge Gear Frame ........................................................................................IV-63

ii
1.26 Paper Feed Motor ..........................................................................................IV-64
1.27 Top Cover Support L and Grounding Plate L .................................................IV-65
1.28 Carriage Motor Enclosure and Grounding Plate R .........................................IV-66
1.29 Encoder Strip.................................................................................................IV-67
1.30 Purge Unit .....................................................................................................IV-68
1.31 Paper Ejection Roller .....................................................................................IV-70
1.32 Main Frame ...................................................................................................IV-71
1.33 Flushing Foams Pack and Ink Absorbers Pack ..............................................IV-72
1.34 Carriage Rail, Carriage ASSY, and Carriage Motor ........................................IV-73
2. LUBRICATION......................................................................................................IV-77
[ 1 ] Document feed roller ASSY and document ejection roller ASSY.............IV-77
[ 2 ] Control panel locks.................................................................................IV-78
[ 3 ] Scanner frame ASSY and separation roller gear.....................................IV-78
[ 4 ] Cover lock (leaf spring) ..........................................................................IV-79
[ 5 ] Top cover ..............................................................................................IV-79
[ 6 ] Gear frame ASSY ..................................................................................IV-80
[ 7 ] PF arm ASSY and tension plate ASSY ..................................................IV-80
[ 8 ] Shafts on the left side of the main frame ................................................IV-81
[ 9 ] Main frame ............................................................................................IV-81
[ 10 ] Purge gear frame ...................................................................................IV-82
[ 11 ] Purge unit ..............................................................................................IV-82
[ 12 ] Idle pulley holder ...................................................................................IV-83
[ 13 ] Lower cover............................................................................................IV-83
3. ADJUSTMENT......................................................................................................IV-84
3.1 Purge Unit Front-to-rear Adjustment ..............................................................IV-84
3.2 Head-platen Gap Adjustment .........................................................................IV-87

CHAPTER VI.
ERROR INDICATION AND
TROUBLESHOOTING

CONTENTS
1. ERROR INDICATION...........................................................................................VI-1
1.1Equipment Errors...........................................................................................VI-1
[ 1 ] Error messages on the LCD..........................................................VI-1
[ 2 ] Error codes shown in the
"MACHINE ERR XX" message.....................................................VI-4
1.2Communications Errors..................................................................................VI-8
2. TROUBLESHOOTING..........................................................................................VI-15
2.1Introduction....................................................................................................VI-15
2.2Precautions....................................................................................................VI-15
2.3Checking prior to Troubleshooting..................................................................VI-15
2.4Troubleshooting Procedures..........................................................................VI-17
[ 1 ] Control panel related.....................................................................VI-17
[ 2 ] Telephone related.........................................................................VI-17
[ 3 ] Communications related................................................................VI-18
[ 4 ] Paper/document feeding related....................................................VI-18
[ 5 ] Print-image related........................................................................VI-19
[ 6 ] PC-driven or video capture-driven printing....................................VI-22

MFC7150C/MFC7160C
MFC-730/MFC-740
Appendix 2. Circuit Diagrams
A. Main PCB
B. Network Control Unit (NCU) PCB
C. Control Panel PCB
D. Power Supply PCB

FACSIMILE EQUIPMENT
PARTS REFERENCE LIST
MODEL: MFC7150C / 7160C
(For U.S.A. / Canada)

FACSIMILE EQUIPMENT
PARTS REFERENCE LIST
MODEL: MFC-740 / 730
( For Germany / United Kingdom / France /
Norway / Belgium / Netherlands /
Switzerland / Italy / Sweden / Euro Generic )

Brother MFC-740 MFC-7150C MFC-7160C service manual
Brother MFC-740 MFC-7150C MFC-7160C service manual
Brother MFC-740 MFC-7150C MFC-7160C service manual
Brother MFC-740 MFC-7150C MFC-7160C service manual
Brother MFC-740 MFC-7150C MFC-7160C service manual
Brother MFC-740 MFC-7150C MFC-7160C service manual
Brother MFC-740 MFC-7150C MFC-7160C service manual
Brother MFC-740 MFC-7150C MFC-7160C service manual
Brother MFC-740 MFC-7150C MFC-7160C service manual