CHAPTER 10 TROUBLESHOOTING
COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
10-44
13. DC power is not supplied
Range
to
which
meter is
set
50VDC
50VDC
10VDC
Meter
indica-
tion
24V
24V
5V
Position
to
which
(-) lead
is con-
nected
J101-6
J101-6
J101-6
Position
to
which
(+) lead
is con-
nected
J101-1
J101-2
J101-3
Action
End. (Be sure to find out
why the protection cir-
cuit operated.)
See sub-section "AC
power is not supplied."
Replace the power sup-
ply assembly.
Remove the cause of the
fuse blowing; then, re-
place the power supply
assembly.
Replace the power sup-
ply assembly.
Replace the DC control-
ler PCB.
Result
Yes
No
No
Yes
No
Yes
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?
Procedure
1
2
3
4
5
Cause/Problem
area
Overcurrent
protection
circuit
AC
power supply
Short connec-
tor
Fuse (F100)
Power supply
assembly
DC controller
PCB
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