Brother 8250P - FAX B/W Laser Printer Service Manual page 171

Trouble
(9) Faulty image registration
(Leading edge of image
starts too late on paper)
(10) Image distortion or
improper image alignment
At the printer side
Instruct the user not to load paper exceeding the limit mark
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on the multi-purpose sheet feeder.
Instruct the user to use the recommended types of paper.
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Replace the multi-purpose sheet feeder.
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Replace the gear drive unit.
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In communications
Check the following components:
- Error code displayed. (Refer to Section 1, "ERROR
INDICATION" in this chapter.)
- NCU PCB
- Main PCB
At the scanner
Check the following components:
- Separator roller and its related sections
- Document feed rollers and their related gears
- Scanner motor and its harness
- Main PCB
At the printer side
Check that the laser unit is secured with the screws without
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looseness.
Check the connection of the polygon motor flat cable on the
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main PCB.
Replace the laser unit.
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VI - 19
Action to be taken