EPSON AcuLaser C9200N Revision D
Troubleshooting Image quality problem 155
Confidential
<4-COLOR>
UNEVEN IMAGE
A. Typical Faulty Images
B. Troubleshooting Procedure
<MONOCOLOR> OR <4-COLOR>
IMAGE TROUBLES THAT APPEAR AT REGULAR INTERVALS
When an image trouble occurred at the certain pitch, some rollers at the printing
process or the paper conveying system in the engine have something wrong. Perform
efficient trouble shooting by checking the appropriate roller, based on circumferential
length (interval) for each roller listed in the following table.
Check as follows.
1. Check the pitch (interval) of image troubles
2. Refer to the following table to find out the appropriate roller.
3. Check if the roller has foreign matters or damages at the point that matches
with the image trouble point.
Step Section Check Item Result Action
1 Toner
Cartridge
The Toner Cartridge of every
color is surely installed.
NO Re-install it.
2 PH Unit PH Unit is surely installed. NO Re-install it.
3 Uneven pitch occurs in 3.0
mm pitch.
YES Replace PH Unit Stopper.
(p.175)
4 Toner
Cartridge
There is any stain or breakage
on the Drive section of the
Toner Cartridge.
YES Clean/replace the Toner
Cartridge.
5 Toner
Cartridge
There is any stain, damage or
abrasion on the PC drum.
YES Replace the Toner Cartridge.
(p.175)
6 2nd Transfer
Roller
There is any stain, damage,
deformation or abrasion on the
2nd Transfer Roller.
YES Replace the 2nd Transfer
Roller. (p.169)
7 Fusing Unit There is any stain, damage,
deformation or abrasion on the
Roller and Drive section of the
Fusing Unit.
YES Replace the Fusing unit.
(p.162)
8 The problem has been
eliminated through the check
of step 7.
NO Replace the Transfer Belt.
(p.162)
Circumferential Length Roller Unit to be Replaced
94.20mm PC Drum Photoconductor Unit
50.24mm Developing Roller
62.61mm 2nd Transfer Roller 2nd Transfer Roller
125.60mm Heating Roller Fusing Unit
116.18mm Pressure Roller
(751 ± 0.7mm) Transfer Belt Transfer Belt Unit
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