Brother HL-4040CN, Руководство по обслуживанию

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Confidential
1-56
Unstable color density
User Check
- Replace the belt unit with a new one.
- Replace the drum unit with a new one.
- Replace the waste toner box with a new one.
- Replace the toner cartridge with a new one.
Step Cause Check
Result
Remedy
1 Drum unit
conduction failure Are the electrodes on the
drum unit and machine
body dirty? Yes Clean both electrodes.
2 Toner cartridge
electrode
connection failure Are the electrodes on the
toner cartridge and
machine body dirty? Yes Clean both electrodes.
3 Dirt on belt unit
electrode Are the electrodes on the
belt unit and machine
body dirty? Yes Clean both electrodes.
4 Main PCB failure Is the problem solved
after replacing the main
PCB ASSY? Yes Replace the main PCB
ASSY.
5 Engine PCB
failure Is the problem solved
after replacing the engine
PCB ASSY? Yes Replace the engine PCB
ASSY.
6 Transfer HVPS
PCB failure Is the problem solved
after replacing the
transfer HVPS PCB
ASSY? Yes Replace the transfer
HVPS PCB ASSY.
7 Charge HVPS
PCB failure Is the problem solved
after replacing the charge
HVPS PCB ASSY? Yes Replace the charge
HVPS PCB ASSY.
8
Laser unit failure Is the problem solved
after replacing the laser
unit? Yes Replace the laser unit.
Hollow print
User Check
- Select the ‘Thick paper mode’ in the printer driver, or use thinner paper than
you are currently using.
- Check the machine’s environment, conditions such as high humidity may
cause this situation to occur.
Step Cause Check
Result
Remedy
1 Fuser unit failure Is the problem solved
after replacing the fuser
unit? Yes Replace the fuser unit.