Brother HL-3040CN, Руководство по обслуживанию, Страница: 122 / 437

3-58
Confidential
■ One color is light
<
User Check
>
- Open and close the top cover and make print again.
- Check the machine’s environment. High temperature and high humidity or low temperature
and low humidity conditions can cause this problem.
- Replace the toner cartridge or drum unit with a new one.
- Adjust the color density from the control panel cover ASSY.
Step Cause Check
Result
Remedy
1 Dirt on exposure
drum electrode Are the electrodes on
the drum unit of the
appropriate color and
machine body dirty? Yes Clean both electrodes.
(Refer to
Fig. 3-3
(P3-32) and Fig. 3-6
(P3-33) )
2 Dirt on develop
roller electrode Are the electrodes on
the develop roller of the
appropriate color and
machine body dirty? Yes Clean both electrodes.
(Refer to
Fig. 3-3
(P3-32) and Fig. 3-6
(P3-33) )
3 Dirt on belt unit
electrode Are the electrodes on
the belt unit of the
appropriate color and
machine body dirty? Yes Clean both electrodes.
(Refer to
Fig. 3-4
(P3-32) and Fig. 3-6
(P3-33) )
4 Dirt on LED array Is the LED array of the
appropriate color dirty? Yes Wipe the dirt off with a
clean, soft, and lint-free
cloth.
5 Lifting of LED
ASSY Is printing of the LED
ASSY test pattern
correctly done in
“Function code 68” ?
No Re-assemble the
LED ASSY.
6 Toner/new sensor
PCB failure After replacing the toner
cartridge of the
appropriate color with a
new one, does the
same problem occur
even after printing sev-
eral pages? No Replace the toner
cartridge of the
appropriate color.
7 Does the machine start
printing even after
removing the toner
cartridge of the
appropriate color from
the drum unit? Yes - Check the harness
connection of the
toner/new sensor
PCB ASSY of the
appropriate color.
- Replace the toner/
new sensor PCB
ASSY of the
appropriate color.