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IntelliFax-4750
Brother IntelliFax-4750 User Manual
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FACSIMILE EQUIPMENT
SERVICE MANUAL
MODEL:
FAX4750/5750
MFC8300/8600/8700
FAX8350P/8750P
MFC9650
2
Table of Contents
Default Chapter
3
Table of Contents
3
Safety Information
4
General Description
5
General Description Contents
6
Components
7
Equipment Outline
7
External Appearance and Weight
7
Specifications
8
Installation Contents
25
Connecting the Facsimile Equipment to Your Computer
26
Installing the Update Data to the Fascimile Equipment
26
Installing Update Data Onto the Flash ROM of the Facsimile Equipment
27
Table of Contents
29
Theory of Operation Contents
29
1 Overview
30
2 Mechanisms
31
Laser Printing Mechanism
31
Scanner Mechanism
32
Document Feeding and Ejecting Mechanism
32
Paper Pick-Up and Registration Mechanism
33
Laser Printing Mechanism
33
Print Process Mechanism
34
Charging Process
35
Exposing Process
35
Developing Process
36
Transferring Process
36
Cleaning the Transfer Roller
36
Heat-Fixing Mechanism
37
Paper Ejecting Mechanism
38
Sensors and Actuators
39
Location of Sensors and Actuators
40
3 Control Electronics
41
Configuration
41
Configuration of Facsimile Equipment
41
Main PCB
42
Block Diagram of Main PCB
42
Engine PCB
44
Ncu Pcb
45
US Versions
45
European Versions
46
Asian/Oceanian Versions
47
Control Panel PCB
48
Control Panel PCB and Its Related Circuit
48
Power Supply PCB
49
1 ] Low-Voltage Power Supply PCB
49
Low-Voltage Power Supply Circuit
49
2 ] High-Voltage Power Supply PCB
50
High-Voltage Power Supply Circuit
50
Disassembly/Reassembly and Lubrication Contents
52
Disassembly/Reassembly
54
Safety Precautions
54
How to Access the Object Component
55
Preparation
55
Disassembly Order Flow
56
Access Plates R and F
57
Rear Cover
57
Reassembling Notes
57
Control Panel ASSY
58
Panel Rear Cover and Control Panel
59
Document Feed Roller ASSY, Document Ejection Roller ASSY, and Pinch Rollers
62
CIS Unit
63
Scanner Frame ASSY (Scanner Motor, Scanner Drive Unit, Document Take-In Roller, Separation Roller, Pressure Rollers, and Control Panel Locks
64
Top Cover (Exit Roller, Speaker, and Document Guides
68
When Setting the Top Cover Back into Place
72
When Connecting the Speaker/Harness to the Main PCB
73
Handset Mount and Hook Switch PCB (for Models Equipped with a Handset) Side Cover (for Models Without Handset
74
Paper Sub Tray
76
VC Cover, VC Bracket, and VC Connector PCB (for Models Supporting Video Capture
77
Front Sub Cover (for Models Not Supporting Video Capture
78
Outer Chute and Paper Pinch Rollers
79
Main Cover
80
Switch Cover
81
Laser Unit
82
Heat-Fixing Unit and FU Lamp
83
Fan
87
Drive Gear ASSY and Main Motor ASSY
89
NCU Shield and NCU PCB
91
Bottom Plate, Main PCB and Bottom Insulation Film
93
Setting up the Main PCB after Replacement
96
Low-Voltage Power Supply PCB and Power Inlet
97
Inner Insulation Film, High-Voltage Power Supply PCB, Engine PCB, and 2Nd Cassette Relay PCB
99
Toner Sensor (Light-Receiver) PCB and Toner Sensor (LED) PCB
101
Gears and Paper Pick-Up Roller
102
Paper Feed Roller ASSY
103
Clutch Levers, Cassette Guide L, and Solenoid
104
Paper Cassette
105
Cleaning of High-Voltage Contacts and Grounding Contacts
106
1 ] Document Feed Roller ASSY and Document Ejection Roller ASSY
108
Lubrication
108
2 ] Control Panel Locks
109
3 ] Scanner Frame ASSY, Document Take-In Roller and Its Shaft, and Separation Roller and Its Shaft
109
4 ] Top Cover
110
5 ] Drive Gear ASSY
111
6 ] Paper Cassette
112
Maintenance Mode Contents
114
Entry to the Maintenance Mode
115
List of Maintenance-Mode Functions
116
Detailed Description of Maintenance-Mode Functions
118
EEPROM Parameter Initialization
118
Function
118
Operating Procedure
118
Printout of Scanning Compensation Data
119
Scanning Compensation Data List
120
ADF Performance Test
121
Test Pattern 1
122
Firmware Switch Setting and Printout
123
Detailed Description for the Firmware Switches
125
Wsw01
125
Wsw02
126
Wsw03
127
Wsw04
129
Wsw05
130
Wsw06
132
Wsw07
134
Wsw08
135
Wsw09
136
Wsw10
137
Wsw11
138
Wsw12
139
Wsw13
140
Wsw14
141
Wsw15
142
Wsw16
143
Wsw17
144
Wsw18
145
Wsw19
146
Wsw20
147
Wsw21
148
Wsw22
148
Wsw23
149
Wsw24
150
Wsw25
151
Wsw26
152
Wsw27
153
Wsw28
154
Wsw29
155
Wsw30
155
Wsw31
156
Wsw32
157
Wsw33
158
Wsw34
159
Wsw35
159
Wsw36
160
Wsw37
161
Wsw38
162
Wsw39
163
Wsw40
164
Wsw41
165
Wsw42
166
Wsw43
167
Configuration List
168
Operational Check of Control Panel PCB
169
Key and Button Entry Order
170
Receiver Volume Adjustment (Applicable to the American Version Only
171
Sensor Operational Check
172
CIS Scanner Area Setting
173
EEPROM Customizing
173
Equipment Error Code Indication
174
Erasure of Received FAX Messages Temporarily Stored in the Flash Memory
174
Cancellation of the Memory Security Mode (Applicable to the European Version Only
175
Output of Transmission Log to the Telephone Line
175
Error Indication and Troubleshooting
177
1 ] Error Messages on the LCD
178
Equipment Errors
178
Error Indication
178
2 ] Error Codes Shown in the "MACHINE ERROR X X" Message
181
Communications Errors
183
Calling
184
Command Reception
184
Definition of Error Codes on the Communications List
184
Compatibility
185
Instructions Received from the Remote Terminal
186
DCN Reception
187
ID Checking
187
TCF Transmission/Reception
187
Signal Isolation
188
Video Signal Reception
188
General Communications-Related
189
Transmission in V. 34 Mode
189
Modem Error Details
190
Maintenance Mode
191
Equipment Error
192
Checking Prior to Troubleshooting
193
Introduction
193
Precautions
193
Recording Paper
194
1 ] Control Panel Related
195
2 ] Telephone Related
195
Troubleshooting Procedures
195
3 ] Communications Related
196
4 ] Paper/Document Feeding Related
196
5 ] Print-Image Related
197
Location of High-Voltage Contacts and Grounding Contacts
204
EEPROM Customizing Codes
206
Circuit Diagrams
209
Modem PCB
224
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 Supply
238
Countries
243
Notes for Using the Parts Reference List
243
Main Frame
245
Document Scanner
247
Paper Transport
251
Paper Tray
253
Heat Fixing Unit
255
Cover
257
Control Panel
259
PCB Assy
261
Accessories
263
Printed Material
264
Carton
266
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Brother IntelliFax-4750 Specifications
General
Brand
Brother
Model
IntelliFax-4750
Category
All in One Printer
Language
English
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