Table Of Contents - Brother IntelliFax-4750 Service Manual

Table of Contents

Table Of Contents3
Safety Information4
General Description5
General Description Contents6
External Appearance And Weight7
Equipment Outline7
Components7
Specifications8
Installation Contents25
Installing The Update Data To The Fascimile Equipment26
Connecting The Facsimile Equipment To Your Computer26
Installing Update Data Onto The Flash Rom Of The Facsimile Equipment27
Theory Of Operation Contents29
Overview30
Mechanisms31
Laser Printing Mechanism31
Scanner Mechanism32
Document Feeding And Ejecting Mechanism32
Paper Pick-Up And Registration Mechanism33
Print Process Mechanism34
Charging Process35
Exposing Process35
Developing Process36
Transferring Process36
Cleaning The Transfer Roller36
Heat-Fixing Mechanism37
Paper Ejecting Mechanism38
Sensors And Actuators39
Location Of Sensors And Actuators40
Control Electronics41
Configuration41
Configuration Of Facsimile Equipment41
Main Pcb42
Block Diagram Of Main Pcb42
Engine Pcb44
Ncu Pcb45
Us Versions45
European Versions46
Asian/Oceanian Versions47
Control Panel Pcb48
Control Panel Pcb And Its Related Circuit48
Power Supply Pcb49
Low-Voltage Power Supply Circuit49
1 ] Low-Voltage Power Supply Pcb49
High-Voltage Power Supply Circuit50
2 ] High-Voltage Power Supply Pcb50
Disassembly/Reassembly And Lubrication Contents52
Disassembly/Reassembly54
Safety Precautions54
Preparation55
How To Access The Object Component55
Disassembly Order Flow56
Rear Cover57
Access Plates R And F57
Reassembling Notes57
Control Panel Assy58
Panel Rear Cover And Control Panel59
Document Feed Roller Assy, Document Ejection Roller Assy, And Pinch Rollers62
Cis Unit63
Scanner Frame Assy (Scanner Motor, Scanner Drive Unit, Document Take-In Roller, Separation Roller, Pressure Rollers, And Control Panel Locks64
Top Cover (Exit Roller, Speaker, And Document Guides68
When Setting The Top Cover Back Into Place72
When Connecting The Speaker/Harness To The Main Pcb73
Handset Mount And Hook Switch Pcb (For Models Equipped With A Handset) Side Cover (For Models Without Handset74
Paper Sub Tray76
Vc Cover, Vc Bracket, And Vc Connector Pcb (For Models Supporting Video Capture77
Front Sub Cover (For Models Not Supporting Video Capture78
Outer Chute And Paper Pinch Rollers79
Main Cover80
Switch Cover81
Laser Unit82
Heat-Fixing Unit And Fu Lamp83
Fan87
Drive Gear Assy And Main Motor Assy89
Ncu Shield And Ncu Pcb91
Bottom Plate, Main Pcb And Bottom Insulation Film93
Setting Up The Main Pcb After Replacement96
Low-Voltage Power Supply Pcb And Power Inlet97
Inner Insulation Film, High-Voltage Power Supply Pcb, Engine Pcb, And 2Nd Cassette Relay Pcb99
Toner Sensor (Light-Receiver) Pcb And Toner Sensor (Led) Pcb101
Gears And Paper Pick-Up Roller102
Paper Feed Roller Assy103
Clutch Levers, Cassette Guide L, And Solenoid104
Paper Cassette105
Cleaning Of High-Voltage Contacts And Grounding Contacts106
Lubrication108
1 ] Document Feed Roller Assy And Document Ejection Roller Assy108
2 ] Control Panel Locks109
3 ] Scanner Frame Assy, Document Take-In Roller And Its Shaft, And Separation Roller And Its Shaft109
4 ] Top Cover110
5 ] Drive Gear Assy111
6 ] Paper Cassette112
Maintenance Mode Contents114
Entry To The Maintenance Mode115
List Of Maintenance-Mode Functions116
Detailed Description Of Maintenance-Mode Functions118
Eeprom Parameter Initialization118
Function118
Operating Procedure118
Printout Of Scanning Compensation Data119
Scanning Compensation Data List120
Adf Performance Test121
Test Pattern 1122
Firmware Switch Setting And Printout123
Detailed Description For The Firmware Switches125
Wsw01125
Wsw02126
Wsw03127
Wsw04129
Wsw05130
Wsw06132
Wsw07134
Wsw08135
Wsw09136
Wsw10137
Wsw11138
Wsw12139
Wsw13140
Wsw14141
Wsw15142
Wsw16143
Wsw17144
Wsw18145
Wsw19146
Wsw20147
Wsw21148
Wsw22148
Wsw23149
Wsw24150
Wsw25151
Wsw26152
Wsw27153
Wsw28154
Wsw29155
Wsw30155
Wsw31156
Wsw32157
Wsw33158
Wsw34159
Wsw35159
Wsw36160
Wsw37161
Wsw38162
Wsw39163
Wsw40164
Wsw41165
Wsw42166
Wsw43167
Configuration List168
Operational Check Of Control Panel Pcb169
Key And Button Entry Order170
Receiver Volume Adjustment (Applicable To The American Version Only171
Sensor Operational Check172
Cis Scanner Area Setting173
Eeprom Customizing173
Equipment Error Code Indication174
Erasure Of Received Fax Messages Temporarily Stored In The Flash Memory174
Output Of Transmission Log To The Telephone Line175
Cancellation Of The Memory Security Mode (Applicable To The European Version Only175
Error Indication And Troubleshooting177
Equipment Errors178
Error Indication178
1 ] Error Messages On The Lcd178
2 ] Error Codes Shown In The "Machine Error X X" Message181
Communications Errors183
Definition Of Error Codes On The Communications List184
Calling184
Command Reception184
Compatibility185
Instructions Received From The Remote Terminal186
Id Checking187
Dcn Reception187
Tcf Transmission/Reception187
Signal Isolation188
Video Signal Reception188
General Communications-Related189
Transmission In V. 34 Mode189
Modem Error Details190
Maintenance Mode191
Equipment Error192
Introduction193
Precautions193
Checking Prior To Troubleshooting193
Recording Paper194
Troubleshooting Procedures195
1 ] Control Panel Related195
2 ] Telephone Related195
3 ] Communications Related196
4 ] Paper/Document Feeding Related196
5 ] Print-Image Related197
Location Of High-Voltage Contacts And Grounding Contacts204
Eeprom Customizing Codes206
Circuit Diagrams209
Modem Pcb224
Engine Pcb (Old Version)227
Engine Pcb (New Version)228
Power Supply Pcb (100-120V)236
Power Supply Pcb (200-240V)237
High-Voltage Power Supply238
Notes For Using The Parts Reference List243
Countries243
Main Frame245
Document Scanner247
Paper Transport251
Paper Tray253
Heat Fixing Unit255
Cover257
Control Panel259
Pcb Assy261
Accessories263
Printed Material264
Carton266