Epson AcuLaser C8500 Service Manual page 475

EPSON AcuLaser C8500
FIP-3.3 All Black FIP-3.3 All Black FIP-3.3 All Black FIP-3.3 All Black
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
Check
m
Faulty electrification
1
Still occurs when laser radiation exit of
ROS ASSY is covered with paper?
Faulty ROS ASSY
2
Still occurs when laser radiation exit of
ROS ASSY is half covered with paper?
Faulty DRUM CARTRIDGE
3
No longer occurs when replaced with
new DRUM CARTRIDGE?
Troubleshooting
Treatment (when there is a
problem)
Check "Faulty HVPS."
Check "Faulty ROS ASSY."
Replace DRUM
CARTRIDGE.
Picture Quality FIP
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
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
Check
m
Faulty electrification
1
Occurs when DRUM CARTRIDGE is
replaced?
Faulty ROS ASSY
2
Still occurs when laser radiation exit of
ROS ASSY is half covered with paper?
Faulty HEAT ROLL/PRESSURE ROLL
Is the HEAT ROLL/PRESSURE ROLL
3
damaged? Is there dirt or foreign
matter adhering to the HEAT ROLL/
PRESSURE ROLL?
Faulty Developer Assy
4
Is the trimmer cap of the Developer
Assy of the concerned color clogged?
Revision C
Treatment (when there is a
problem)
Replace DRUM
CARTRIDGE.
Check "Faulty ROS ASSY."
Replace or clean the HEAT
ROLL/PRESSURE ROLL.
Replace the Developer
Assy of the concerned
color.
5-123