Light; Dark - Brother MFC5490CN Service Manual

Problem

(4) Light

(5) Dark

(6) Straight or blurred, black or
white, vertical stripes
At the scanner
Check the following components:
- Scanner cover (CIS unit)
- Main PCB
At the printer
Check the following components:
- Ink cartridges
- Head/carriage unit and carriage PCB ASSY
- Main PCB
- Power supply PCB
- Head property data (Refer to
- Maintenance unit
At the scanner
Check the following components:
- Scanner cover (CIS unit)
- Main PCB
At the printer side
• Perform the purge operation (Function code 76) several times to
remove dust or air bubbles from its nozzles. If the problem persists,
replace the head/carriage unit. (Refer to
Check the following components:
- Ink cartridges
- Head/carriage unit and carriage PCB ASSY
- Main PCB
- Power supply PCB
- Head property data (Refer to
- Maintenance unit
Scanner
Check the following components:
- Scanner cover (CIS unit)
- Scanner glass
Printer
• Check whether paper is coming into contact with any components
other than the ones it should during ejecting.
• Check the CR encoder strip for stains or scratches. (If the CR encoder
strip is not hooked properly, correct it.)
4-37
Action to be taken
Chapter 9, Section
Chapter 9, Section
Chapter 9, Section
9.4.20.)
9.4.24.)
9.4.20.)
Confidential