Ricoh CH-C1 - Page 143

Technical Bulletin PAGE: 4/8
Model: CH-C1
Date: 15-Nov-13
No.: RD135050
No.3 Blurred image at 189mm intervals (OPC drum
circumference)
SYMPTOM
The first few printouts after turning on the machine may have blurred image at
189mm intervals (which corresponds to the OPC drum circumference) on
halftone images in a high humidity environment.
Cause
Charge failure caused by “corona products” that form on the OPC drum
If the symptom occurs when all of the conditions below are met,
 Operation after a long break (as in the initial operation of the day)
 Halftone image
 High humidity
Action
1. Execute “Color Registration” from “Maintenance” in User Tools.
2. Execute “Auto Color Calibration” from “Maintenance” in User Tools.