5 ] Print-Image Related - Brother 8250P - FAX B/W Laser Printer Service Manual

[ 5 ] Print-image related

If the received or sent image has any problem, first make a copy with the facsimile equipment.
If the copied image is normal, the problem may be due to the remote terminal; if it is abnormal,
proceed to the following checks:
Trouble
(1) Completely blank
(2) All black
At the scanner
Check the following components:
- CIS harness
- Main PCB
- CIS unit
At the printer side
Clean the high-voltage contacts for the developer roller on
l
the drum unit, main cover, and high-voltage power supply
PCB. (Contacts ‡ in the illustration given on page VI-21)
Check the connection of the laser diode harness on the main
l
PCB.
Replace the main PCB.
l
At the scanner
Check the following components:
- CIS harness
- CIS unit
- Main PCB
At the printer side
Clean the high-voltage contacts for the grid and corona wire
l
on the drum unit, main cover, and high-voltage power supply
PCB. (Contacts ... and † in the illustration given on page
VI-21)
Check the connection of the main–high-voltage flat cable.
l
Replace the drum unit.
l
Replace the main PCB.
l
VI - 16
Action to be taken