5 ] Print-Image Related - Brother MFC7050C 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) Random color
(3) All black
At the scanner
Check the following components:
- CIS harness
- Main PCB
- CIS unit
At the printer
• Check each of the ink cartridges to confirm that the transparent
tape covering the print head is removed.
• Check that the ink cartridges has not run out of ink.
• Check the dimple contacts between the print heads embedded in
the Ink cartridges and the FPC on the carrier. Clean them if
contaminated.
(If the problem persists, replace the carrier ASSY.)
• Check the connection of the carrier flat cables on the main PCB.
(If either of those cables is broken or damaged, replace the
carrier ASSY.)
• Replace the main PCB.
At the scanner
Check the following components:
- CIS harness
- CIS unit
- Main PCB
At the printer
Check the following components:
- Print heads embedded in the ink cartridges
- Main PCB
- Carrier ASSY (Replace the carrier ASSY.)
VI - 7
Action to be taken