Ricoh CH-C1 - RTB 119: FSM Correction: SC381;382

Technical Bulletin PAGE: 1/2
Model: CH-C1 Office/Pro
Date: 26-May-14
No.: RD135119
Field Service Manual Correction
5. Troubleshooting > Service Call 300-398 > SC300 (Engine: Development) (Pg. 1024)
Replace the description of SC381 (Potential sensor output high error) and SC382
(Potential sensor output low error) in the above section with the following.
SC No.
Level
Error Name/Error Condition/Major Cause/Solution
SC381-01
D
Potential sensor output high error (K)
SC381-02
D
Potential sensor output high error (C)
SC381-03
D
Potential sensor output high error (M)
SC381-04
D
Potential sensor output high error (Y)
Vd(700) greater than 800[-V]
Details:
In Vd detection, which is done at the beginning of process
control, the measured potential (Vd) is converted to the
potential when -700 V is applied to the drum (Vd700) and
used to check the potential sensor.
Potential sensor dirty (foreign object, such as toner,
entering the probe window) / potential sensor probe
connector disconnected / potential sensor probe
defective.
 Use a blower brush to clean the window of the
potential sensor probe, then check the sensor again.
 Disconnect and reconnect the potential sensor probe
connector, then check the sensor again.
 Disconnect and reconnect the harness connecting the
potential sensor board and potential sensor probe,
then check the sensor again.
 If this does not solve the problem, replace the potential
sensor probe.
SC No.
Level
Error Name/Error Condition/Major Cause/Solution
SC382-01
D
Potential sensor output low error (K)
SC382-02
D
Potential sensor output low error (C)
SC382-03
D
Potential sensor output low error (M)
SC382-04
D
Potential sensor output low error (Y)
Vd(700) lesser than 500[-V]
Details:
Subject: FSM Correction: SC381/382 tables
Prepared by: R. Chino
From: PP Tech Service Dept., 1st PP Tech Service Sect.
Classification:
Troubleshooting
Mechanical
Paper path
Product Safety
Part information
Electrical
Transmit/receive
Other ( )
Action required
Service manual revision
Retrofit information
Tier 2