Ricoh Pro C901 Technical Bulletin page 417

Model:
Aries-P1.5/C1.5
Subject:
Minimizing Idling of Development Units
From:
1st PP Tech Service Sec., PP Tech Service Dept.,
Classification:
GENERAL
This bulletin provides information on the developer mixture degradation that occurs in the
Y, M and C development units, which is caused by the idling operation of these units. If
poor image quality is confirmed as a result of degraded developer mixture, modify the SP
setting as described below, which will minimize the idling operation of the Y, M and C
development units.
Why is this important?
 Idling of the development unit (= no toner consumption) affects the characteristics of
both toner and carrier and degrades the developer mixture, resulting in poor image
quality.
 Poor image quality leads to customer dissatisfaction as well as high service costs
generated from frequent developer replacements.
 Developer yield is highly dependent on the drive distance of the components in the
development unit. Idling without consuming any toner not only degrades the developer,
but will also shorten the life of the developer.
Why Y, M and C?
Y, M and C development units tend to idle more than the Bk development unit. This is
because, by default, these units are designed to continuously run idle even when the
printing mode switches to mono-chrome from full-color. Y, M and C development units
remain inactive only if printed in mono-chrome mode throughout the entire operation, from
startup to stand-by.
SP MODIFICATION
To minimize the idling operation of Y, M and C development units, modify the following SP
value as described below.
Enter the following SP and change the value from "0" (default) to "10".
ACS Switch Set: FC
Mode: Cont Bk
Image N Sheets
T
echnical
Troubleshooting
Mechanical
Paper path
Product Safety
SP
SP 2-907-001
B
ulletin
Date:
09-Jul-13
Prepared by:
Part information
Electrical
Transmit/receive
Other ( )
Number of sheets
Default printed in FC before
switching to Bk mode
0
PAGE: 1/2
No.:
RM077095
T. Miyamoto
Action required
Service manual revision
Retrofit information
Tier 2
10