Self Diagnosis; Dadf Self Diagnosis - Canon FY8-13FW-000DADF-A1 Service Manual

CHAPTER 5 TROUBLESHOOTING
V. SELF DIAGNOSIS
A.

DADF Self Diagnosis

The microprocessor on the machine's DADF controller PCB is provided with a function which
checks the state of the machine and, upon detection of an error, will indicate an error code on the
copier's control panel.
Code
Caution:
1. When the self diagnostic mechanism has turned on, the copier may be reset by turning it
off and then on.
2. When the DADF is out of order, copies may still be made by placing originals on the
copyboard glass.
5-32
COPYRIGHT © 1998 CANON INC.
Cause
• The communication of data
with the copier is faulty.
• The pick-up motor (M1) does
not rotate.
• The pick-up roller sensor (S5)
is faulty.
• The belt motor (M3) doe not
rotate.
• The belt motor sensor (S10)
is faulty.
• The feeder motor (M2) does
not rotate.
• The feeder motor clock
sensor (S9) is faulty.
• The delivery motor (M5) does
not rotate.
• The delivery motor clock
sensor (S13) is faulty.
• The original tray paper sensor
(S1) is fauity.
• The registration sensor (S3)
is faulty.
Table 5-501
CANON DADF-A1 REV.0 DEC. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Description
• The communication is monitored at all
times, and this error is identified if the
communication is interrupted for 5 sec or
more.
• A flag is mounted on the spindle of the
pick-up motor (M1), and the rotation of the
pick-up motor is mounted in reference to the
flag blocking the pick-up roller sensor (S5).
This error is identified when the sensor
does not turn on and off twice or more
within 1 sec
• The number of belt motor clock pulses
within 200 msec is lower than specific value.
• The number of feeder motor clock pulses
within 200 msec is lower than a specific
value.
• The number of feeder motor clock pulses
within 200 msec is lower than a specific
value.
• The output of the sensor is 2.3 V or higher
in the absence of paper.