Epson AcuLaser C8500 Service Manual page 478

EPSON AcuLaser C8500
FIP-3.7 Fogging FIP-3.7 Fogging FIP-3.7 Fogging FIP-3.7 Fogging
Description / initial check
Fogging
When toner adheres to the margins of the print.
*Initial check
Use of parts of incorrect specifications, improper mounting, damage,
distortion, dirt, adherence of foreign matter?
*Main parts to check
DRUM CARTRIDGE, HVPS, Developer Assy, DEVE. CONTACT PLATE ASSY
Ite
Check
m
Deterioration of developer
1
No longer occurs when Developer Ass of
concerned color is replaced?
DEVE. CONTACT PLATE ASSY mounting
check
2
Is the DEVE. CONTACT PLATE ASSY
properly mounted?
Faulty HVPS
3
No longer occurs when HVPS is
replaced?
Faulty drum
4
No longer occurs when DRUM
CARTRIDGE is replaced?
Troubleshooting
Treatment (when there is a
problem)
Replace Developer Assy.
Properly mount the DEVE.
CONTACT PLATE ASSY.
Replace HVPS.
Replace DRUM CARTRIDGE.
Picture Quality FIP
FIP-3.8 Paper Skew FIP-3.8 Paper Skew FIP-3.8 Paper Skew FIP-3.8 Paper Skew
Description / initial check
Skew
When picture image printing is skewed.
*Initial check
Use of parts of incorrect specifications, improper mounting, damage,
distortion, dirt, adherence of foreign matter?
*Main parts to check
MAIN FUSER ASSY, MSI FEED ASSY, FEED ROLL ASSY, TURN ROLL ASSY,
MAIN P/H FRAME ASSY
Ite
Check
m
Faulty paper mounting
1
Is paper or paper cassette properly
mounted?
Paper transport route problem
2
Are there burrs, foreign matter or dirt in
the paper transport route?
Feed roll problem
3
Do the feed rolls feed paper properly?
Paper roll problem
Is there foreign matter/dirt on the paper
4
transport rolls? Are they distorted or not
functioning properly?
ROS ASSY mounting check
5
Is the ROS ASSY improperly mounted?
Faulty DRUM CARTRIDGE
6
No longer occurs when replaced with a
new DRUM CARTRIDGE?
Revision C
Treatment (when there is a
problem)
Properly mount paper or
paper cassette. (The user
should mount paper and the
paper cassette properly.)
Clean/replace concerned
part(s).
Clean/replace concerned
part(s).
Clean/replace concerned
part(s).
ROS ASSY remounting
Replace DRUM CARTRIDGE.
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