Canon NP6317 Service Manual page 208

CHAPTER 10 TROUBLESHOOTING
13. DC power is not supplied
Cause/Problem
Procedure
area
Overcurrent 1
protection
circuit
AC 2
power supply
Short connec- 3
tor
Fuse (F100) 4
Power supply 5
assembly
DC controller
PCB
10-44
Check
Does the problem disappear when the
copier is switched OFF and the ON again?
Is AC line voltage present between termi-
nals J103-1 and J103-2?
Are the following connector pins con-
nected properly?
J100-4 and J100-5, J100-1 and J100-2
Has a fuse (F100) on the power supply as-
sembly blown?
Are the following output voltages present
at the various connectors on the power
supply assembly shown below?
Range Position
to to
which which
meter is (+) lead
set is con-
nected
50VDC J101-1
50VDC J101-2
10VDC J101-3
COPYRIGHT © 1999 CANON INC.
Result
Position Meter
to indica-
which tion
(-) lead
is con-
nected
J101-6 24V
J101-6 24V
J101-6 5V
CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Action
Yes End. (Be sure to find out
why the protection cir-
cuit operated.)
No See sub-section "AC
power is not supplied."
No Replace the power sup-
ply assembly.
Yes Remove the cause of the
fuse blowing; then, re-
place the power supply
assembly.
No Replace the power sup-
ply assembly.
Yes Replace the DC control-
ler PCB.