5 ] Print-Image Related - Brother FAX 2800 - B/W Laser - Fax 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 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
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 4-36.)
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.
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 charger on the
drum unit, main cover, and high-voltage power supply PCB.
(Contacts and
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.
6 -2 1
Action to be taken
in the illustration given on page 6-28)
in the illustration