E411 Indicator - Canon DADF-G1 Service Manual

CHAPTER 5 TROUBLESHOOTING

2.1.5 E411 Indicator

Original tray paper sensor (S1), Registration sensor (S3)
1) Connect the probes of the digital multimeter to the following con-
YES: Go to step 2.
NO:
S1,S3
2) Is the light-receiving segment of each sensor soiled with paper lint
YES: Clean the light-receiving segment of the sensor with a cotton swab,
LED1, LED2 (for sensor)
3) Connect the probes of the digital multimeter to the following con-
NO:
Sensor (output level)
4) After steps 2 and 3, check the output by performing the instruc-
NO:
Sensor
5) Is the problem corrected after step 4?
YES: End.
NO:
5-22
nectors on the DADF controller PCB. Is the reading 2.3 V or less
when nothing blocks the sensor?
Replace the DADF controller PCB.
Original tray
sensor (S1)
Registration
sensor (S3)
or the like?
and go to step 3.
nectors of the DADF controller PCB. Is the reading about 0.6 to 1.1
V?
Check the wiring from the LED to the DADF controller PCB; if
normal, replace the LED.
LED1
LED2
tions in step 1. Is the reading of the digital multimeter 1.2 V or less?
Adjust the position of the sensor.
Replace the sensor.
COPYRIGHT© 2000 CANON INC.
(+) (-)
J5-7 J5-8
J9-20 J9-21
(+) (-)
J5-7 J5-8
J9-20 J9-21
CANON DADF-G1 REV.0 OCT. 2000