Ricoh A628 Modification Bulletin DF43

RICOH Technical Bulletin

Model: AD1 (DF43) Date: 28-Feb-97

No: 019

Subject: Black stripes Prepared by: K. Ugaeri
From: QAC 2nd Field Information Dept . Checked by: S. Fujii
Classification:

Troubleshooting
Mechanical
Paper path
Other ( )

Part information
Electrical
Transmit/receive

Action required
Service manual revision
Retrofit information

SYMPTOM

Black stripes when using the sheet scanner

CAUSE

Dust on the exposure glass.

SOLUTION

1. Mylars have been added to the original scale (A6283192) to prevent the scanning
position of the exposure glass from becoming dirty.

1/2

Feed Direction

Index 26 of page 2 for DF43
parts catalog

Mylar 1 Mylar 2 Mylar 3

Rear side of the
original scale

Fig.1

RICOH Technical Bulletin

Model: AD1 (DF43) Date: 28-Feb-97 No: 019 2/2

Because the contact position of the original becomes dirty with paper dust, it has been
moved from the scanning position by using mylars.

Feed Direction

Mylar

Scanning Position
contact position

Fig. 2

2. The surface of the exposure glass has been specially treated.

Note: This exposure glass has a white mark. This mark must be at the bottom rear side at

installation.

White mark

Fig. 3