Technical Bulletin
No. RTB-017
SUBJECT: Original misfeed.
DATE:
Mar. 15, 1993
PAGE: 1 of 2
PREPARED BY: N. Takai
CHECKED BY:
FROM: Copier Technical Support Section
CLASSIFICATION:
Action Required
Troubleshooting
Retrofit Information
Revision of service manual
Information only
Other
MODEL:
F40 ARDF
Symptom:
Original misfeed occurs intermittently.
Possible Cause:
1. The DF registration sensor is activated by paper dust on the sensor pad, affecting its
color.
2. When the original feed roller starts rotating, the DF upper guide plate is warped slightly
downward. The clearance between the DF registration sensor and the sensor pad is
reduced. When this happens, the DF registration sensor (reflective type) can receive the
reflective light from the sensor pad, even though its color is black.
Action Required:
(For cause 1)
1. Open the feed-in unit [A].
2. Clean the DF registration sensor
surface [B] and the sensor pad [C].
NOTE: To remove the paper dust from
the sensor pad, it is better to
use scotch tape.
[A]
[C]
[B]
