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Brother
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All in One Printer
Brother
FAX-921, MFC-970MC, FAX-931
service manual
Active Gears on the Inner Side of the Drive Unit
Models:
MFC-970MC
FAX-931
FAX-921
1
26
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218 pages
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Specifications
Install
Code list
Error codes
Appendix 2. Circuit Diagrams
Signal isolation
Printer Fault
Maintenance
Configuration
Command reception
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Active Gears on the Inner Side of the Drive Unit
III
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Contents
Facsimile Equipment
Page
Appendix Eeprom Customizing Codes Circuit Diagrams
Preface
Chapter
Contents
External Appearance and Weight
Components
Specifications
FAX870MC MFC970MC
Model Name FAX-910 FAX-920/921
Model Name FAX-930/931 MFC-925
Installation
Theory of Operation
Control Electronics
Overview
Transmitting Mechanism Feeding and scanning documents
Automatic document feeder ADF
Scanner
Receiving Mechanism Feeding paper and printing data
Power Transmission Mechanism
Structure of the gear train
Description of planetary gear system
Power transmission for four operation modes
Scanning mode Solenoid OFF, Motor rotation Reverse
Arm B Blocked by Section of Clutch Lever Active Gears
Recording mode Solenoid OFF, Motor rotation Forward
Active Gears on the Inner Side of the Drive Unit
Copying mode Solenoid ON, Motor rotation Forward
Active Gears on the Inner Side of the Drive Unit
Power transmission route
III
Sensors and Actuators
Location of Sensors and Actuators
III
Configuration
Control Electronics
Main PCB
Page
NCU PCB
European versions III
Control Panel PCB
Power Supply PCB
DISASSEMBLY/REASSEMBLY, Lubrication and Adjustment
IV-47
DISASSEMBLY/REASSEMBLY
Safety Precautions
Tightening Torque List
How to Access the Object Component
Preparation
Disassembly Order Flow
ROM Cover, Battery ASSY* and Ribbon Shaft Stopper
Reassembling Notes
Control Panel Assy
Disconnect the panel-main harness
Panel Rear Cover and Control Panel
Page
Page
Page
Reassembling Notes
LF Roller Assy and CIS Unit
Peel off the black CIS film
Page
Reassembling Notes
Page
Page
Page
Reassembling Notes
Recording Paper Cover Assy and Paper Guides
Page
Page
Page
Page
Page
Page
Page
Remove the two screws and lift up the paper feed chute
Page
Page
Reassembling Notes
Cover Stopper and Platen Frame Assy
Page
Bottom Plate
Power Supply PCB, Main PCB, and NCU PCB
Page
Reassembling Notes
Page
Drive Unit, Motor, and Main-Head Harness
Panel-lock Leaf Springs
Cover Sensor Actuators and Pinch Roller
Page
Handset Mount,* Hook Switch PCB,* and Dummy Mount
Harness Routing
Lubrication
Page
LF roller Assy Platen frame Assy
Page
Separation roller and main frame
Maintenance Mode
Output of Transmission Log to the Telephone Line
Entry Into the Maintenance Mode
List of MAINTENANCE-MODE Functions
Page
Operating Procedure
Eeprom Parameter Initialization Function
Printout of Scanning Compensation Data Function
Scanning Compensation Data List
ADF Performance Test Function
Test Pattern Function
Firmware Switches WSW01 through WSW36
Operating Procedure
Detailed Description for the Firmware Switches
Selector 8 Default dialing mode, pulse DP or tone PB dialing
WSW03 PABX* mode setting
Selectors 6 and 7 Dial tone detection in Pabx
WSW04 Transfer facility setting
WSW05 1st dial tone and busy tone detection
Selector 7 Busy tone detection in automatic receiving mode
WSW06 Pause key setting and 2nd dial tone detection
Selectors 4 through 6 Detection of international tone
These selectors set the detection level of the 2nd dial tone
WSW08 Dial tone setting
Station in automatic sending
CML ON/OFF
WSW11 Busy tone setting
WSW12 Signal detection condition setting
These selectors set the optimum receive signal level
WSW14 Auto ANS facility setting
No. of redialings Times
WSW16 Function setting
OFF
No tone
WSW19 Transmission speed setting
Selector Function Setting and Specifications EP* tone prefix
WSW21 TAD setting
WSW22 ECM and caller ID setting
WSW23 Communications setting
TCF
WSW24 TAD setting
WSW25 TAD setting
Pseudo ring backtones in F/T mode
WSW27 Function setting
WSW28 Function setting
WSW29 Function setting
WSW30 Function setting
WSW31 Function setting
WSW32 Function setting
Low Comfortable noise level Medium High
WSW34 Function setting
WSW35 Function setting
Printout of firmware switch data Function
Operational Check of LCD Function
Operational Check of Control Panel PCB Function
Key & Button Entry Order
Sensor Operational Check Function
FRE
Fine Adjustment of Scanning Start/End Position Function
CIS Scanner Area Setting Function
Eeprom Customizing Function
Equipment Error Code Indication Function
Output of Transmission Log to the Telephone Line Function
Document Draw Adjustment
Error Indication and Troubleshooting
VI-12
Equipment Errors
Error messages on the LCD
Printer Fault
Error codes shown in the Machine Error message
Page
Communications Errors
Definition of Error Codes on the Communications List Calling
Command reception
Compatibility checking the NSF and DIS
Page
TCF transmission/reception
ID checking
DCN reception
General communications-related
Signal isolation
Video signal reception
Maintenance mode
Equipment error
Introduction
Precautions
Checking prior to Troubleshooting
Troubleshooting Procedures 1 Control panel related
Telephone related
Communications related
Paper/document feeding related
Print-image related
Others
July ’98
Appendix 1. Eeprom Customizing Codes
Eeprom Customizing Codes
Eeprom Customizing Codes List
Germany
Appendix 2. Circuit Diagrams
Main PCB 1/5 FAX750/FAX770/FAX-910 FAX-920/FAX-921/MFC-925
Main PCB 2/5
Main PCB 3/5
Page
Page
Main PCB 1/6
Main PCB 2/6 FAX870MC/MFC970MC/FAX-930 FAX-931
Main PCB 3/6 FAX870MC/MFC970MC/FAX-930 FAX-931
Page
Main PCB 5/6 FAX870MC/MFC970MC/FAX-930 FAX-931
Page
NCU
U S L
NCU 1/2
NCU 2/2
N E
E M
NCU France
NCU CHINA, India
Control Panel 1/2
Y C O E
0 8 W 1 3 S 6 / 6 C
0 K O 1 K O 2 K O 3 K O 4 K O 5 K O
Page
Page
Parts Reference List
Page
Countries
Page
Platen Frame Attachment
ROM COVER, GRAY1267
Control Panel ASSY, GRAY1395, FAX-930 for FRA
Control PANEL, GRAY1395, FAX-940 for FRA
KEY,ONE TOUCH, WHITE1397, FAX-920/930 for ARL/NZ
NCU PCB ASSY, FAX-920/930/MFC-970MC for ARL
Telephone Line CORD, FAX-920 for ISR
UU0628010
Including Operations Manual FAX-921/931/MFC-925
Including Operations Manual FAX-920/930/MFC-925
Operations MANUAL, FAX-910 for GER
Operations MANUAL, FAX-920/930/940/MFC-925 for FRA
CARTON, Brother FAX-920 for NOR/FIN/DEN/SWE
Page
REF.NO Code QTY Description
