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Confidential
■ Faint print
■ White spots
<User Check>
- Check that the machine is installed on a level surface.
- Replace the toner cartridge with a new one.
- Clean the scanner windows of the toner unit with a soft
cloth. (Refer to Fig. 3-6.)
- The drum unit may be damaged. Replace the drum unit
with a new one.
Step Cause Check
Result
Remedy
1
Main PCB failure Is the problem solved
after replacing the main
PCB ASSY?
Yes
Replace the main PCB
ASSY.
2
Laser unit failure Is the problem solved
after replacing the laser
unit?
Yes
Replace the laser unit.
3
Toner empty
sensor failure
Is the "Toner Life End"
message indicated on
the LCD after replacing
the current toner
cartridge with a new
one?
No
Replace the toner sensor
PCB ASSY.
<User Check>
- Toner may be empty. Replace the toner cartridge with a new one.
- If the problem is not solved after printing a few pages, the drum unit
may have glue from label stock on the exposure drum surface. Refer
to the next page, and wipe it off gently with a cotton swab.
- The drum unit may be damaged. Replace the drum unit with a new
one.
Step Cause Check
Result
Remedy
1
Toner attached
on the develop
roller
Are the horizontal
stripes at 42.5 mm
(develop roller
circumference)
intervals?
Yes
This problem will
disappear by printing
approximate 10 pages. If
the same problem occurs,
replace the toner cartridge.
2
Scratch and Dirt
on the exposure
drum
Are the horizontal
stripes at 94.2 mm
(exposure drum
circumference)
intervals?
Yes
Replace the drum unit.
3
Drum unit
connection
failure
Are the electrodes on
the drum unit and
machine body dirty?
Yes
Clean both electrodes.
(Refer to Fig. 3-2, Fig. 3-3.)
4
HVPS PCB
failure
Is the problem solved
after replacing the
HVPS PCB ASSY?
Yes
Replace the HVPS PCB
ASSY.
5
Main PCB failure Is the problem solved
after replacing the main
PCB ASSY?
Yes
Replace the main PCB
ASSY.