CHAPTER 5 TOROUBLESHOOTING
5-32
COPYRIGHT © 1999 CANON INC.
CANON DADF-B1 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
VI. SELF DIAGNOSIS
A. ADF Self Diagnosis
The microprocessor on the ADF controller PCB is equipped with a mechanism that checks the
condition of the ADF. It runs checks as needed and, when it finds a fault, it will indicate an error
code on the copier's control panel.
· The communication with the
copier is faulty.
· The feed motor (M2) fails to
rotate.
· The feed motor clock sensor
(SR1) is faulty.
· The reversal delivery motor
(M3) fails to rotate.
· The reversal delivery motor
clock sensor (SR7) is faulty.
Caution:
1. If the self diagnostic mechanism has
turned on, you may reset the machine
by turning off and then on the copier.
2. You may continue to make copies
while the ADF is out of order. Open
the ADF, and place originals on the
copyboard glass.
Table 5-501
Code
Cause
Description
· The communication with the
copier is monitored at all times.
This error is identified if it is
interrupted for 5 sec or more.
· The feed motor encoder pulse is
not detected within 300 msec
after the feed motor drive signal
has been turned on.
· The reversal delivery motor
encoder pulse is not detected
within 300 msec after the feed
motor drive signal has been
turned on.