Ricoh CH-C1 - RTB 52: SC502-SC504 and Misdetection of paper end

Technical Bulletin PAGE: 1/4
Model: CH-C1 Office/Pro (D135/D136/D137/D138)
Date: 20-Nov-13
No.: RD135052
Subject: SC502-SC504 and Misdetection of paper end (for
NA/EU/AA)
Prepared by: Chihiro Shimaji
From: 1st Tech Service Sect., MFP/P 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
SYMPTOM
1. SC502 – SC504 (2
nd
/3
rd
/4
th
Tray Lowering/Lift Error)
2. Misdetection of Paper End
CAUSE
The paper tray is filled over the specification limit, causing the paper stack to hit the paper
end feeler with force and knock the feeler off the paper feed unit.
Tray shift direction when closing tray
Paper end feeler
Paper
Paper over the limit