4-Color> Uneven Image; Monocolor> Or <4-Color> Image Troubles That Appear At Regular Intervals - Epson AcuLaser C9200N Service Manual

EPSON AcuLaser C9200N
<4-COLOR>
UNEVEN IMAGE
A. Typical Faulty Images
B. Troubleshooting Procedure
Step Section
1 Toner The Toner Cartridge of every
Cartridge color is surely installed.
2 PH Unit PH Unit is surely installed.
3 Uneven pitch occurs in 3.0
mm pitch.
4 Toner There is any stain or breakage
Cartridge on the Drive section of the
Toner Cartridge.
5 Toner There is any stain, damage or
Cartridge abrasion on the PC drum.
6 2nd Transfer There is any stain, damage,
Roller deformation or abrasion on the
2nd Transfer Roller.
7 Fusing Unit There is any stain, damage,
deformation or abrasion on the
Roller and Drive section of the
Fusing Unit.
8 The problem has been
eliminated through the check
of step 7.
Troubleshooting
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Check Item Result
NO Re-install it.
NO Re-install it.
YES Replace PH Unit Stopper.
(p.175)
YES Clean/replace the Toner
Cartridge.
YES Replace the Toner Cartridge.
(p.175)
YES Replace the 2nd Transfer
Roller. (p.169)
YES Replace the Fusing unit.
(p.162)
NO Replace the Transfer Belt.
(p.162)
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<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.
Circumferential Length
94.20mm
50.24mm
Action
62.61mm
125.60mm
116.18mm
(751 ± 0.7mm)
Image quality problem
Roller Unit to be Replaced
PC Drum Photoconductor Unit
Developing Roller
2nd Transfer Roller 2nd Transfer Roller
Heating Roller Fusing Unit
Pressure Roller
Transfer Belt Transfer Belt Unit
Revision D
155
Confidential