Ricoh CH-C1 User Manual

Technical Bulletin PAGE: 1/4
Reissued:1-Oct-14
Model: Model CH-C1 (Office/Pro)
Date: 2-Jun-14
No.: RD135133a
RTB Reissue
The items in bold italics were added.
SYMPTOM
Paper is wrinkled in an area of approximately 50mm in width at the trailing edge.
The problem occurs in duplex printing, using light weight A3/DLT paper.
CAUSE
The wrinkles are caused by either or both of the following factors:
 Pressure applied by the 3 idle rollers in the duplex inverter motor unit (see page 4 for
the location) causes the drive roller shaft to slightly bend, approximately 0.5mm. As a
result, the nip is slanted and squeezes the front (operator) and rear (non-operator)
sides of the paper toward the center.
 Backlash of the bearing holder causes misalignment of the 3 idle rollers.
SOLUTION
Production line:
1. The drive roller shaft was modified to a slightly thicker shaft to prevent deflection.
2. The bearing holder was modified to prevent backlash.
3. Pressure of the springs attached to both ends of the idle rollers was increased.
Subject: Wrinkles in a 50mm-wide area at the trailing edge
with light weight A3/DLT paper
Prepared by: Ryuuta Chino
From: 1st Tech Service Sect. PP 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

Ricoh CH-C1 Specifications

General

Brand	Ricoh
Model	CH-C1
Category	Printer Accessories
Language	English