Ricoh CH-C1 Technical Bulletin page 254

Model:
Model CH-C1 (Office/Pro)
Subject:
Troubleshooting for Uneven density in the area 85mm
from the trailing edge
From:
1st Tech Service Sect. PP Tech Service Dept.
Classification:
SYMPTOM
The density in independent dot halftone or halftone areas may be higher or lower in the
area 0-85mm from the trailing edge, when printing under low-temperature/low-humidity
conditions.
CAUSE
 Variations in the attractive force and distance between the ITB and paper immediately
before paper transfer
 Toner scatters in the pre-transfer section after the paper clears the registration rollers,
which produces high image density in these areas.
SOLUTION
Adjust the speed of the registration rollers as follows.
 If the image density is high, set the following to a lower value, and vice-versa.
 Change the value 1% at a time and check the results.
Pro/Office
Pro/Office
Pro
Pro/Office
Pro
T
echnical
Troubleshooting
Mechanical
Paper path
Product Safety
SP No.
SP2-451-001
SP2-802-001 to 100
IMSS setting No.
38
B
ulletin
Date:
07-Mar-14
Prepared by:
Part information
Electrical
Transmit/receive
Other ( )
SP Name
[ITB K:Standard: FC]
[ITB Bias:K:FC] (for each
custom paper)
IMSS setting
Image Transfer Current
Setting: FC: Black
(for each custom paper)
PAGE: 1/1
No
.: RD135083
Ryuuta Chino
Action required
Service manual revision
Retrofit information
Tier 2
Value
0 to 70
0 to 70
Value
0 to 70