Brother MFC640CW - 8 ] Control Panel; 9 ] Pcbs

9-46 Confidential
[ 8 ] Control panel
Defective component Result Error codes
Rubber keypad - Keys will not work. ---
Control panel PCB - The LCD will show nothing.
- Keys will not work.
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[ 9 ] PCBs
Defective component Result Error codes
Main PCB
- No faxes will be able to be sent.
- No phone calls will be able to be made.
- Copying will not be possible.
- PC-driven printing will not be possible.
- Scanning will not be possible.
- The machine will not be able to be turned on.
- Any of the following images may appear on the
printout of sent, copied, or scanned data:
- The telephone will not ring.
- No tone will be detected.
- The machine will not be able to switch to the
external telephone.
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MJ PCB - No faxes will be able to be sent.
- No phone calls will be able to be made.
- The telephone will not ring.
- No tone will be detected.
- The machine will not be able to switch to the
external telephone.
D
*
Power supply PCB - The machine will not be able to be turned on.
- The printed image will become lighter.
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