Brother MFC6800 - 5 ] Print-Image Related

6-21
[ 5 ] Print-image related
If the received or sent image has any problem, first make a copy with the machine.
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 Action to be taken
(1) Completely blank At the scanner
Check the following components:
- CCD flat cable
- Main PCB
- CCD unit
At the printer side
 Clean the high-voltage contacts for the developer roller on the
drum unit, main cover, and high-voltage power supply PCB.
(Contacts
in the illustration given on page 6-28)
 Clean the grounding contacts on the drum unit, main cover, and
high-voltage power supply PCB. (Contacts
in the illustration
given on page 6-28)
 Check that the grounding plate is sandwiched between the
contact plate and gear drive unit. (Refer to CHAPTER 4,
Subsection 4.1.21, page 4-52.)
 Replace the toner cartridge.
 Replace the drum unit.
 Check the connection of the laser flat cable on the main PCB.
 Replace the main PCB.
 Replace the laser unit.
 Replace the high-voltage power supply PCB.
(2) All black At the scanner
Check the following components:
- CCD flat cable
- CCD unit
- Main PCB
At the printer side
 Clean the high-voltage contacts for the grid and charger on the
drum unit, main cover, and high-voltage power supply PCB.
(Contacts
and in the illustration given on page 6-28)
 Clean the charger (corona wires) itself.
 Check the connection of the laser flat cable on the main PCB.
 Replace the drum unit.
 Replace the high-voltage power supply PCB.
 Replace the main PCB.