Canon DADF-J1 Service Manual page 197

CHAPTER 5 TROUBLESHOOTING
2) Press the push switch (SW2) once.
• The 7-segment LED (LED2) on the
ADF controller PCB will start to flash
[1] to indicate that a check on the sen-
sor operation has started.
3) Press the push switch SW3 or SW4; the
indication of the 7-segment LED
(LED2) will change to indicate the state
(paper present/absent) of the sensor in
question. (See T05-103-08.)
LED2
indication
ON
Flashing
T05-103-10
4) To end the check, press the push switch
(SW2) once.
• The LED2 indication will return to
normal mode.
5-40
Presence/absence of
paper
Present
Absent
COPYRIGHT © 2001 CANON INC.
J1
FU2
J2
J4
IC1
FU1
SW1
J5
LED2
SW4SW3SW2
J3
J6 J7
SW2
F05-103-15
J1
FU2
J2
J4
IC1
FU1
SW1
J5
LED2
J3 SW4SW3SW2
J6 J7
SW3
SW4
F05-103-16
J1
FU2
J2
J4
IC1
FU1
SW1
J5
LED2
J3 SW4SW3SW2
J6 J7
SW2
F05-103-17
2000 2000 2000 2000 CANON DADF-J1 REV.0 MAR.2001
J14
J13
J12
J8 J9 J10 J11
J14
J13
J12
J8 J9 J10 J11
J14
J13
J12
J8 J9 J10 J11