Brother MFC640CW - Page 122

Brother MFC640CW

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5-36 Confidential

(7) Pull up the front edge of the carriage PCB to release the rear edge from the two latches

provided on the head/carriage unit. Then lift the carriage PCB up and out of the head/carriage

unit.

Flat core

Carriage PCB

Latches

Head/carriage unit

Carriage-head flat cable

Cable clamp on the head joint

Table of Contents

Default Chapter1
- Service Manual1
- How this Manual Is Organized3
- Safety Precautions6
- To Use the Machine Safely6
- Caution7
- Warning7
- Choosing a Location8
- Parts Names & Functions9
- Front View11
- Outline11
- Rear View11
- Control Panel13
- Mfc820Cw13
- Menu Keys14
- On/Off14
- Start Keys14
- Stop/Exit14
- Dial Pad15
- Ink15
- Message Center Keys15
- Telephone Keys15
- Black Start16
- Copy Options16
- Fax Resolution16
- Navigation Keys16
- Color Start17
- Copy Keys (Temporary Settings)17
- Mono Start17
- Ink Management18
- Liquid Crystal Display18
- Photocapture18
- Scan18
- Components19
- Specifications20
- Table of Contents21
Chapter 2 Specifications22
- General Specifications22
  - Dimensions (W X D X H)23
  - Weight23
- Paper Specifications24
- Printable Area27
- Unprintable Area27
Specifications List28
- Post Card32
- Post Card33
- Full35
- Theory of Operation37
Chapter 3 Theory of Operation38
Overview39
Mechanical Components40
- Scanner Mechanism41
- Printing Mechanism41
Control Electronics78
- Components78
Chapter 5 Disassembly/Reassembly and Lubrication87
Disassembly/Reassembly87
- Safety Precautions87
- Tightening Torque88
- Preparation89
- How to Access the Target Component89
Lubrication161
- Document Pull-In Roller and Document Separation Roller162
- Adjustments and Updating of Settings163
- Required after Parts Replacement163
- Executables / Files Required for Adjustments and Updating of Settings166
- Requirements166
- Spare Parts/Supplies Required for Adjustments/Updating of Settings166
Chapter 6 Adjustments and Updating of Settings166
Preparation166
- Loading the Update Programs/Data to the Machine167
If You Replace the Head/Carriage Unit or Engine Unit171
- 1 ] Update the Head Property Information Stored in the EEPROM171
- On the Main PCB173
- 2 ] Clean the New Head/Carriage Unit174
- 3 ] Correct the Positioning Error of the Head/Carriage Unit175
- 4 ] Update the Paper Feeding Correction Value177
- 5 ] Align Vertical Print Lines180
- 6 ] Margin Adjustment in Near-Edge Printing182
- 7 ] Print out a Test Pattern185
- 8 ] Switch Back to Standby185
- 9 ] Replace the Ink Cartridges with Protective Ones185
If You Replace the Main Pcb186
- 1 ] Load Update Programs/Data186
- 2 ] Initialize the EEPROM on the Main PCB (Function Code 01)186
- 3 ] Customize the EEPROM on the Main PCB (Function Code 74)187
- 4 ] Check the Control Panel PCB for Normal Operation (Function Code 13)187
- 5 ] Make a Sensor Operational Check (Function Code 32)187
- 6 ] Acquire White Level Data and Set the CIS Scanner Area (Function Code 55)187
- 7 ] Set an ID Code and Update the Head Property Information187
- 8 ] Update the Paper Feeding Correction Value190
- 9 ] Align Vertical Print Lines190
- 10 ] Margin Adjustment in Near-Edge Printing190
- 11 ] Adjust the Light Intensity of the LCD Backlight190
- 12 ] Specify the CIS Type (Function Code 59)190
- 13 ] Switch Back to Standby190
Chapter 8 Maintenance M Ode199
Entry into the Maintenance Mode199
List of Maintenance-Mode Functions200
User-Access to the Maintenance Mode201
Detailed Description of Maintenance-Mode Functions203
- EEPROM Parameter Initialization (Function Code 01, 91)203
- Printout of Scanning Compensation Data (Function Code 05)204
- Test Pattern (Function Code 09)206
- Error Indication and Troubleshooting249
Chapter 9 Error Indication and Troubleshooting252
Error Indication252
- Equipment Errors252
- 1 ] Error Messages Appearing on the LCD252
- 2 ] Error Codes Contained in "MACHINE ERROR X X" Messages256
- Communications Errors270

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