Gestetner G060 Service Manual page 913

BULLETIN NUMBER:
APPLICABLE MODEL:
GESTETNER – DSc38/DSc38S
RICOH – AP3800C/AP3800CMF
SAVIN – SLP38c/SLP38cS
SUBJECT: LOW HUMMING NOISE FROM PAPER TRANSFER UNIT
SYMPTOM:
The machine makes a low humming noise while printing. The noise tends to be louder in 62.5mm/sec mode
(1200x1200 dpi, or OHP/Thick Paper mode).
CAUSE
The Transfer Charge Brushes become dirty with toner and/or dust. This increases the friction between the
fibers and Transfer Belt, causing the brush to vibrate and generate the humming noise.
SOLUTION
Production line modification:
Cushions (#G0603705) have been added to the Transfer Belt Unit to absorb the vibration of brushes. They
are attached directly onto the unit underneath the brushes. Please refer to the following table for the cut-in
serial number of this modification
UNITS AFFECTED:
All G060 copiers manufactured after the Serial Numbers listed below will have the new style ((Part Name))
installed during production
Gestetner DSc38/ DSc38S
Ricoh AP3800C/ AP3800CMF
Savin SLP38c/ SLP38cS
Attach the cushions (#G0603705: 4pcs/machine) onto the transfer charge brushes as shown below (this is to
reduce the working time in the field. Installing the cushions onto the transfer unit would require belt removal).
Please refer to the following pages for the detailed procedure.

Copyright 2002 RICOH Corporation. All rights reserved.
TECHNICAL SERVICE BULLETIN
G060/G570 - 011
MODEL NAME
Troubleshooting in the field:
SERIAL NUMBER
P6010800001
P6010800001
P6010800001
09/18/2002
Continued...