Epson AcuLaser C8500, Service Manual

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EPSON AcuLaser C8500 Revision C
Troubleshooting Picture Quality FIP 5-123
FIP-3.3 All Black FIP-3.3 All Black FIP-3.3 All Black FIP-3.3 All Black FIP-3.4 White or Too Light in Paper Transport Direction FIP-3.4 White or Too Light in Paper Transport Direction FIP-3.4 White or Too Light in Paper Transport Direction FIP-3.4 White or Too Light in Paper Transport Direction
Description / initial check
All Black
Entire surface is printed completely black.
*Initial check
Use of parts of incorrect specifications, improper mounting, damage,
distortion, dirt, adherence of foreign matter?
*Main parts to check
DRUM CARTRIDGE, HVPS, ROS ASSY, MCU PWB
Ite
m
Check
Treatment (when there is a
problem)
1
Faulty electrification
Still occurs when laser radiation exit of
ROS ASSY is covered with paper?
Check “Faulty HVPS.”
2
Faulty ROS ASSY
Still occurs when laser radiation exit of
ROS ASSY is half covered with paper?
Check “Faulty ROS ASSY.”
3
Faulty DRUM CARTRIDGE
No longer occurs when replaced with
new DRUM CARTRIDGE?
Replace DRUM
CARTRIDGE.
Description / initial check
White
The picture image has a white streak in the paper transport direction or is
too light.
*Initial check
Use of parts of incorrect specifications, improper mounting, damage,
distortion, dirt, adherence of foreign matter?
*Main parts to check
DRUM CARTRIDGE, HVPS, ROS ASSY, MCU PWB, HEAT ROLL,
PRESSURE ROLL, MAIN FUSER ASSY
Ite
m
Check
Treatment (when there is a
problem)
1
Faulty electrification
Occurs when DRUM CARTRIDGE is
replaced?
Replace DRUM
CARTRIDGE.
2
Faulty ROS ASSY
Still occurs when laser radiation exit of
ROS ASSY is half covered with paper?
Check “Faulty ROS ASSY.”
3
Faulty HEAT ROLL/PRESSURE ROLL
Is the HEAT ROLL/PRESSURE ROLL
damaged? Is there dirt or foreign
matter adhering to the HEAT ROLL/
PRESSURE ROLL?
Replace or clean the HEAT
ROLL/PRESSURE ROLL.
4
Faulty Developer Assy
Is the trimmer cap of the Developer
Assy of the concerned color clogged?
Replace the Developer
Assy of the concerned
color.