Canon FY8-13FW-000DADF-A1 Service Manual page 128

2. E401
Parts Step
Pick-up roller
sensor (S5)
Pick-up motor
(M1)
3. E402
Step
Parts
Belt motor clock
sensor (S10)
Belt motor (M3)
COPYRIGHT © 1998 CANON INC.
Checks
1
Set the meter range to 20 VDC,
and connect the + probe to J5-1
and the - probe to J5-2 on the
DADF controller PCB. Then,
turn the flag (light-blocking
plate) on the pick-up roller
shaft by hand.
Is the voltage about 5 V when
the flag is at the sensor and
about 0.15 V otherwise.
2
Set the meter range to 200 VDC,
and connect the +probeto J12-1
and the - probeto J12-2 on the
controller PCB.
Does the reading change to 22 V
when the Copy Start key is
pressed?
Table 5-202
Checks
1
Set the meter range to 20 VDC,
and connect the + probe to J9-B4
and the - probe to J-B3 on the
DADF controller PCB. Does the
reading repeat 5 and 0 V when the
clock disk is turned slowly by
hand?
Set the meter range to 200 VDC,
2
and connect the + probe to J7-1
and the - probe to J7-2 on the
controller PCB. Does the reading
change to 23 V when the Copy
Start key is pressed?
Table 5-203
CANON DADF-A1 REV.0 DEC. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 5 TROUBLESHOOTING
Yes/No
Action
No
Check the wiring from
Yes
the pick-up motor (M1)
to the DADF controller
PCB; if normal, replace
the pick-up motor (M1).
No
Replace the DADF cont
roller PCB.
Yes/No Action
No
Check the wiring from the
belt motor clock sensor
(S10) to the DADf controller
PCB; if normal, replace the
belt motor clock sensor
(S10).
Yes Check the wiring from the
belt motor (M3) to the
DADF controller PCB; if
normal, replace the belt
motor (M3).
Replace the DADF
No
controller PCB.
5-21