Canon FY8-13FW-000DADF-A1 Service Manual page 130

6. E411
Step
Parts
Original tray
paper sensor
(S1)
Registration
sensor
(S3)
(S1)(S3)
Original tray
paper sensor (S1)
LED3
Sensors
Sensor
COPYRIGHT © 1998 CANON INC.
Checks
1 Connect the meter probes to the
following connectors on the
DADF controller PCB.
Is the reading 2.3 V or less
when there is nothing blocking
the sensor?
Original tray
paper sensor
(S1)
Registration
sensor (S3)
Is the light-receiving unit of
2
each sensor soiled with paper
lint or the like?
3 Connect the meter probes to
the following connectors on the
DADF controller PCB. Is the
reading about 0.6 to 1.1 V?
S1
LED3
4 After steps 2 and 3, check the
output according to the table in
step 1. At this time, is the
reading 1.2 V or less?
Is the problem corrected after
5
step 4?
Table 5-206
CANON DADF-A1 REV.0 DEC. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 5 TROUBLESHOOTING
Yes/No
Yes
No
(+) (-)
J5-8 J5-9
J9- J9-
B12 B11
Yes
No
(+) (-)
J5-7 J5-9
J9- J9-
B10 B9
No
Yes
No
Action
Go to step 2.
Replace the DADF
controller PCB.
Clean the light-receiving
unit of the sensor, and go
to step 3.
Check the wiring from
LED3 to the DADF
controller PCB;
if normal, replace the
sensor or and LED3.
Adjust the position of
the sensor.
End.
Replace the sensor.
5-23