Ricoh df61 Technical Bulletin
Technical Bulletin No. RTB-011
SUBJECT: DF61 Dirty Mark on Back-side of Original DATE:July 31, ’96
PAGE: 1 of 3
PREPARED BY: S. Hizen
FROM: 1st Field Information Dept. QAC
CHECKED BY:
CLASSIFICATION:
Action Required
Troubleshooting
Retrofit Information
Revision of service manual
Information only
Other
MODEL:
Phoenix-series
(DF61)
Problem: Three dirty marks on the back side of the original.
Cause: The toner on the first original is transferred to the back of the second
original due to the pressure applied by the pressure lever and the pick-up roller.
(See the illustration)
Pressure Lever
Second
Original
First Original
Pick-up Roller
Pick-up Roller
The dirty marks created are one of the limitations of the DF61. The degree to which
the marks appear varies depending on how completely the image on the first original
is fused, the type of image, and the type of paper used.
Countermeasure:
Due to this countermeasure for the DF61, the specifications listed in the service
manual have been changed as follows:
Specification Item Current DF Modified DF
Original Weight 52 to 128 g/m
2
Original Table Capacity 50 sheets at 80 g/m
2
35 sheets at 80 g/m
52 to 104 g/m
2
2
Technical Bulletin No. RTB-011
SUBJECT: DF61 Dirty Mark on Back-side of Original DATE: July 31, ’96
PAGE: 2 of 3
The countermeasure for the dirty marks is designed to reduce the pressure applied
to the originals by replacing the entrance guide stopper spring with a new one. This
change also results in a decrease in the amount of force used to feed the original
and may create an original non-feed problem. Therefore, the separation bracket
has been modified to reduce the angle by 2 degrees.
Separation Bracket
Separation Bracket
2°
CURRENT
Modification Procedure:
1. Remove the three springs from the entrance guide stopper and install the new
spring (P/N:A548 9500) in the middle. If an original non-feed occurs, add the
outside springs (P/N:A548 9500) on both sides.
MODIFIED
Remove the spring
Remove the spring
Replace the spring with a
new one (weaker).
70g (current) → 40g (new)
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