Canon NP6317 Service Manual page 211

18. Scanner does not move
Cause/Problem
Procedure
area
Drive cable 1
Foreign object 2
in the path of
the scanner
Gears 3
Scanner motor 4
(M2)
DC power 5
supply PCB
DC controller 6
PCB
COPYRIGHT © 1999 CANON INC.
Check
Is the scanner drive cable installed cor-
rectly?
Switch the copier OFF, hold the back of
the scanner and move it back and forth.
Does it move smoothly?
Is the scanner drive capstan engaged with
the interruption gear? (See Figure 10-401.)
Switch the power OFF and disconnect
connector J302 on the DC controller PCB.
Set the meter to the 100 range and mea-
sure the registance between the connectors
shown below. Is the registance ?
J302-1 (COMB)-J302-2(B)
J302-1 (COMB)-J302-3(B)
J302-4 (COMA)-J302-5(A)
J302-4 (COMA)-J302-6(A)
Set the meter to the 50VDC range. Con-
nect the (+) lead to J300-1 and the (-) lead
to J300-3, and the (+) lead to J300-2 and
the (-) lead to J300-3, of the DC controller
PCB. Is the voltage approx. 24V?
Does the problem disappear when the DC
controller PCB is replaced?
CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 10 TROUBLESHOOTING
Result
No
No
No
No
6
6
6
6
No
Yes
Action
Install the cable cor-
rectly.
Check for dirt or foreign
matter on the scanner
rails or some object that
is touching the scanner.
If necessary, clean, lubri-
cate or repair.
Check if the spring that
lifts the interruption
gear, the interruption
gear, or the scanner drive
capstan is damaged. Ad-
just or replace any parts
necessary.
Check the wiring from
J302 to the scanner mo-
tor (M2). If it is normal,
replace the scanner mo-
tor.
Check the wiring from
the DC controller PCB to
the DC Power supply
PCB. If it is normal, see
"DC power not being
supplied."
End.
10-47