Brother FAX-2840 Service Manual page 116

Faulty registration
Step
Scan start position misalignment
1
Document scanning position
2
actuator catching on some position
Dark or bluish white
<User Check>
- Check that the setting of the contrast does not become dark.
- If this problem occurs immediately after deep sleep mode is
Step
Incorrect white level data
1
2 CIS unit failure
3 Main PCB failure
Cause
released, install the latest firmware. If installing the firmware is not
possible, open and close the front cover, and then retry printing after
the main motor has stopped.
Cause
2-79
Remedy
Perform the fine adjustment of scan start
position. (Function code
Correct the position of the document
scanning position actuator.
Remedy
Perform the acquisition of white level data.
(Function code 55)
Replace the CIS unit.
Replace the main PCB ASSY.
54)
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