Cis Unit; Cis Flat Cable; Scanner Drive Unit; 2 ] Scanner Mechanism - Brother MFC640CW Service Manual

[ 2 ] Scanner mechanism

Defective component

CIS unit

CIS flat cable

Scanner drive unit

- Any of the following images may appear on the
printout of sent, copied, or scanned data:
- When the power is turned on, abnormal noises will
be heard from the machine.
- Any of the following errors occurs:
- Dark level offset data level error for scanning
- Gain control data level error for scanning
- Scan area right/left edge detection error
- Horizontal scanning edge reduction/enlargement
detection error in scanning area setting
- White/black level data error
- Scan starting edge detection error
- Machine error A7
- Any of the following images may appear on the
printout of sent, copied, or scanned data:
- When the power is turned on, abnormal noises will
be heard from the machine.
9 - 4 2
Result Error codes
A7, B9,
BB, BD
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