Technical Bulletin PAGE: 1/11
Model: AG-P1 / C1 Date: 20-Apr-11 No.: RM077024
Subject: Buffer Pass unit modification Prepared by: Hiroaki Matsui
From: PPBG QA/Service Planning Dept.
Classification:
Troubleshooting
Mechanical
Paper path
Product Safety
Part information
Electrical
Transmit/receive
Other ( )
Action required
Service manual revision
Retrofit information
Tier 2
Symptom
The Buffer Pass Unit of the initial production connected to the Pro C901/C901s may cause
image quality problems of “roller marks on paper edges” and/or “vertical white streaks”.
Cause
The Transport Rollers and the Guide Plates installed in the Buffer Pass Unit of the initial
production tend to easily pick up toner when printing high density images, and may result
in the following image quality problems.
Roller Marks on Paper Edges caused by toner contaminated Transport Rollers
Vertical White Streaks caused by toner contaminated Guide Plates
Before print
operation
After print
operation
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