Ricoh CH-C1 - RTB 165: Troubleshooting drum lubricant bar early PM alert

Technical Bulletin PAGE: 1/2
Model: CH-C1a
Date: 1-Mar-16
No.: RD135165
SYMPTOM
Near end alert for the drum lubricant bar appears even when the lubricant bar has not
reached near end. The failure occurs only when a used lubricant bar has been installed
instead of a brand new one.
CAUSE
The hook on the lubricant bar assembly is locking the arm of the sensor, causing the
sensor to constantly detect near end status.
In detail
Installing a used lubricant bar may
cause the hook (see photo to the right)
to jam the arm of the sensor when
attaching the lubricant brush roller
cover, depending on the remaining
amount of lubricant. If the machine is
operated in this condition, the hook
eventually pushes aside and locks the
arm of the sensor. This will not happen
with a new lubricant bar, because the
width of a new bar secures enough
clearance and the hook will not interfere
with the arm of the sensor when attaching the lubricant brush roller cover.
Subject: Troubleshooting drum lubricant bar early PM alert
Prepared by: Tatsuki Mimura
From: 1st MFP Tech Service Sec., MFP Tech Service Dept.
Classification:
Troubleshooting
Mechanical
Paper path
Product Safety
Part information
Electrical
Transmit/receive
Other ( )
Action required
Service manual revision
Retrofit information
Tier 2
Arm of the sensor
is slanted.
Arm of the sensor
is straight.
Arm of the sensor
Hook
Brush roller cover
Lubricant bar assembly