Brother MFC-5200C User manual

FACSIMILE EQUIPMENT
SERVICE MANUAL
MODEL: MFC5200C/MFC890

PREFACE
This publication is a Service Manual covering the specifications, construction, theory of operation,
and m aintenance of the Brother facsim ile equipm ent. I t includes inform ation required for field
troubleshooting and repair--disassembly, reassem bly, and lubrication- -so that serv ice personnel
will be able to understand equipm ent function, to rapidly repair the equipm ent and order any
necessary spare parts.
To perform appropriate m aintenance so that the facsim ile equipment is alw ays in best condition
for the customer, the service personnel must adequately understand and apply this manual.
This manual is made up of eight chapters and appendices.
SAFETY INSTRUCTIONS
CHAPTER 1 PARTS NAMES & FUNCTIONS
CHAPTER 2 SPECIFICATIONS
CHAPTER 3 INSTALLATION
CHAPTER 4 THEORY OF OPERATION
CHAPTER 5 MAINTENANCE
CHAPTER 6 DISASSEMBLY/REASSEMBLY, LUBRICATION, AND ADJUSTMENT
CHAPTER 7 MAINTENANCE MODE
CHAPTER 8 TROUBLESHOOTING
Appendix 1. Serial No. Descriptions
Appendix 2. Installation
Appendix 3. EEPROM Customizing Codes
Appendix 4. Firmware Switches (WSW)
Appendix 5. Re-packing Instructions
Appendix 6. Wiring Diagram
Appendix 7. Circuit Diagrams
This manual d escribes th e models an d their v ersions to b e d estined for major co untries. T he sp ecifications
and functions are subject to change depending upon each destination.

CHAPTER 6 DISASSEMBLY/REASSEMBLY, LUBRICATION,
ADJUSTMENT
CONTENTS
6.1 DISASSEMBLY/REASSEMBLY .....................................................................................6-1
Safety Precautions.......................................................................................................6-1
Tightening Torque List......................................................................................................6-2
Preparation ..................................................................................................................6-4
How to Access the Object Component........................................................................6-4
Disassembly Order Flow..............................................................................................6-5
6.1.1 Print Head Unit.....................................................................................................6-6
6.1.2 ADF Cover and Document Guide Base.............................................................6-12
6.1.3 ADF Components on the Upper ADF Chute......................................................6-13
6.1.4 ADF Components on the Lower ADF Chute......................................................6-18
6.1.5 Document Cover Open Sensor and ADF Document Output Support
Extension............................................................................................................6-23
6.1.6 Manual Feed Slot Cover and Rear Cover..........................................................6-24
6.1.7 Main PCB Shield Case and Scanner Unit (Together with Document Cover)....6-25
6.1.8 Control Panel ASSY...........................................................................................6-30
6.1.9 Disassembly of the Control Panel ASSY ...........................................................6-31
6.1.10 Disassembly of the Scanner Unit.......................................................................6-32
6.1.11 Edge Cover, Scanner Links and Their Guides...................................................6-37
6.1.12 Main Cover.........................................................................................................6-38
6.1.13 Media Module (Media Cover, Media PCB, and Frame) and Media Flat
Cables................................................................................................................6-39
6.1.14 Main PCB and its Shield Frame.........................................................................6-41
6.1.15 ASF and ASF roller ASSY..................................................................................6-43
6.1.16 FG Plates, Power Supply PCB, and NCU PCB.................................................6-45
6.1.17 Speaker..............................................................................................................6-47
6.1.18 Purge Unit ..........................................................................................................6-48
6.1.19 Driver PCB .........................................................................................................6-50

6.1.20 Encoder Strip, Idle Pulley Holder, and Carriage Motor......................................6-53
6.1.21 Harness Support Film L, Head Flat Cables, Carriage Rail, and Carriage
ASSY..................................................................................................................6-55
6.1.22 Purge-Related Parts (Purge Lever, Purge Shaft, and ASF-Purge Switching
Gear 23).............................................................................................................6-62
6.1.23 Paper Pressure Holders.....................................................................................6-63
6.1.24 Paper Chute.......................................................................................................6-65
6.1.25 Star Wheel Support and Platen..........................................................................6-65
6.1.26 Flushing Foam Case..........................................................................................6-67
6.1.27 Main Chassis......................................................................................................6-68
6.1.28 Ink Empty Sensor PCB ......................................................................................6-69
6.1.29 Paper Feed Motor, PF Timing Belts, PF Roller Pulley L, Paper Feed Roller,
Ejection Roller Pulley, and Paper Ejection Roller..............................................6-70
6.1.30 Extension Tube, Ink Absorber Box and its Felts, and Antistatic Brush..............6-73
6.1.31 Harness Routing.................................................................................................6-75
6.2 LUBRICATION...............................................................................................................6-78
6.3 ADJUSTMENT...............................................................................................................6-86

6-1
6.1 DISASSEMBLY/REASSEMBLY


Safety Precautions
To prevent the creation of secondary problems by mishandling, observe the following precautions
for maintenance work.
(1) If y ou unpack the p ackage sent
from the user, first check that the
top edg e o f th e he ad w iper is
flush w ith t hat of the head cap
unit bef ore tu rning on the
machine. I f the he ad wipe
r
p
rotrudes or is out of place,
lightly pull up the head wiper an
d
move it towards the head cap unit
to retract it.
Head cap unit
Head wiper
(2) Unplug the pow er cord from the p ower outlet be fore rep lacing parts or u nits. When having
access to the power supply, be sure to unplug the power cord from the power outlet.
(3) Be careful not to lose screws, washers, or other parts removed for parts replacement.
(4) Do not remove gears from the document feed roller ASSY (shown on page 6-14) or document
ejection roller ASSY (shown on page 6-19) if at all possible. Once removed, they will become
unusable and new gears will have to be put back in.
(5) When using soldering irons and other heat-generating tools, take care not to damage the resin
parts such as wires, PCBs, and covers.
(6) Before handling the PCBs, touch a metal portion of the machine to discharge static electricity;
otherwise, the electronic parts may be damaged due to the electricity charged in your body.
(7) When transporting PCBs, be sure to wrap them in conductive sheets such as aluminum foil.
(8) Be sure to reinsert self-tapping screws correctly, if removed.
(9) Tighten screws to the torque values listed on the following pages.
(10) When connecting or disconnecting cable connectors, hold the connector bodies not the cables.
If the connector has a lock, always slide the connector lock to unlock it.
(11) Before reassembly, apply the specified lubricant to the specified points. (Refer to Subsection
6.2 in this chapter.)
(12) After repairs, check not only the repaired portion but also that the connectors and other related
portions function properly before operation checks.
(13) Once the print head unit prints, it will start head locking operation after five seconds from the
end of printing. T he he ad l ocking opera tion wi ll tak e 5 to 10 secon ds. NEVER unplug the
power cord before the machine completes the head locking operation; doing so w ill make the
print head unit unusable and require replacement with a new print head unit.
When you receive the m achine from the us er or when you pack it for sending it back to the
user, check the head locking state.

CHAPTER 7 MAINTENANCE MODE
CONTENTS
7.1 CONTROL PANEL...........................................................................................................7-1
7.2 ENTRY INTO THE MAINTENANCE MODE....................................................................7-3
7.3 LIST OF MAINTENANCE-MODE FUNCTIONS..............................................................7-4
7.4 USER-ACCESS TO THE MAINTENANCE MODE..........................................................7-5
7.5 DETAILED DESCRIPTION OF MAINTENANCE-MODE FUNCTIONS ..........................7-6
7.5.1 EEPROM Parameter Initialization........................................................................7-6
7.5.2 Printout of Scanning Compensation Data............................................................7-7
7.5.3 Movement of CCD Unit to the Transport Position................................................7-9
7.5.4 ADF Performance Test ......................................................................................7-10
7.5.5 Test Pattern 1.....................................................................................................7-11
7.5.6 Firmware Switch Setting and Printout ................................................................7-12
7.5.7 Operational Check of LCD .................................................................................7-15
7.5.8 Operational Check of Control Panel PCB ..........................................................7-16
7.5.9 Sensor Operational Check.................................................................................7-17
7.5.10 Fine Adjustment of Scanning Start/End Position ...............................................7-18
7.5.11 CCD Scanner Area Setting ................................................................................7-19
7.5.12 Setting the Sensing Reference Level of the Ink Empty Sensor .........................7-20
7.5.13 Alignment of Vertical Print Lines ........................................................................7-21
7.5.14 Updating of Paper Feeding Correction Value.....................................................7-23
7.5.15 Updating of Head Property Information..............................................................7-25
7.5.16 Initial Adjustment of PWM Value (Aging of the Carriage) ..................................7-26
7.5.17 EEPROM Customizing.......................................................................................7-27
7.5.18 Display of the Equipment's Log Information.......................................................7-28
7.5.19 Equipment Error Code Indication.......................................................................7-29
7.5.20 Output of Transmission Log to the Telephone Line...........................................7-29
7.5.21 Cancellation of the Pin TX Lock Mode (Not applicable to American models)....7-30

CHAPTER 8 ERROR INDICATION AND TROUBLESHOOTING
CONTENTS
8.1 ERROR INDICATION.......................................................................................................8-1
8.1.1 Equipment Errors .................................................................................................8-1
[ 1 ] Error messages on the LCD ........................................................................8-1
[ 2 ] Error codes shown in the "MACHINE ERROR X X " message....................8-4
8.1.2 Communications Errors........................................................................................8-9
8.2 TROUBLESHOOTING...................................................................................................8-16
8.2.1 Introduction.........................................................................................................8-16
8.2.2 Precautions ........................................................................................................8-16
8.2.3 Checking prior to Troubleshooting .....................................................................8-16
8.2.4 Troubleshooting Procedures..............................................................................8-18
[ 1 ] Control panel related..................................................................................8-18
[ 2 ] Telephone related......................................................................................8-18
[ 3 ] Communications related............................................................................8-19
[ 4 ] Paper/document feeding related................................................................8-19
[ 5 ] Print-image related.....................................................................................8-20
[ 6 ] PC-driven printing ......................................................................................8-23
[ 7 ] SmartMedia-, Compact Flash-, or Memory Stick-driven printing...............8-24
Cleaning the purge unit ........................................................................................8-25
Cleaning the print head unit..................................................................................8-25
8.3 JAMS..............................................................................................................................8-26
8.3.1 Original Jams .....................................................................................................8-26
8.3.2 Printer Jam or Paper Jam ..................................................................................8-27

8-1
8.1 ERROR INDICATION
To help the user or the serv ice personnel prom ptly locate the cause of a problem (if any), the
facsimile equipm ent incorporates the self- diagnostic functions w hich display error messages for
equipment errors and communications errors.
For the communications errors, the equipm ent also prints out the transm ission verification report
and the communications list.
8.1.1 Equipment Errors
If an equipment error occurs, the facsimile equipment emits an audible alarm (continuous beeping)
for approximately 4 seconds and shows the error m essage on the LCD. For the error messages, see
[ 1 ] below.
To display detailed error information, use the m aintenance-mode function code 82 described in
CHAPTER 7, Subsection 7.5.18 (that is, make the equipment enter the maintenance mode and then
press the 8 and 2 keys). Following the MACHI NE ERROR, one of the error codes listed in [ 2 ]
will appear on the LCD.
[ 1 ] Error messages on the LCD
Messages on the LCD Probable Cause
CHECK CARTRIDGE
Open cover, then reinstall ink
cartridge.
(These messages appear alternately.)
Any of the ink cartridges is not loaded.
CHECK ORIGINAL
(CHECK DOCUMENT)
Remove original, and press
STOP KEY.
(Remove documents, then
press STOP KEY.)
(These messages appear alternately.)
 Document jam
(1) The document length exceeds the limitation (400 or 90 cm)
registered by firmware switch WSW16. (Refer to Appendix
2.)
(Both the document front and rear sensors stay ON even
after the document has been fed by the registered length.)
(2) The document rear sensor detects no trailing edge of a
document after the document has been fed by 400 cm.
(The document rear sensor stays ON even after the
document has been fed when the document front and rear
sensors were OFF and ON, respectively.)