Canon NP6320 Service Manual page 222

CHAPTER 10 TROUBLESHOOTING
13. AC power is not supplied
Cause Step
Power plug 1
Door switch 2
Line power 3
4
Circuit 5
breaker (CB1)
Power cord
Door 6
switch (DS1)
Power 7
switch (SW1)
Wiring
10-44
COPYRIGHT © 1999 CANON INC.
Checks
Is the power cord plugged into the outlet?
Are the front door and the copy delivery
cover closed completely?
Is line voltage being supplied to the power
outlet?
Is line voltage present between J101-1 and
J101-2?
Check the continuity between the termi-
nals of the circuit breaker (CB1). Is the re-
sistance 0Ω?
Check the continuity between the termi-
nals of the door switch (DS1). Is the resis-
tance 0Ω when the actuator is pressed, and
∞ when the actuator is released?
Check the continuity between the termi-
nals 1 and 2 of the power switch (SW1). Is
the resistance 0Ω when the switch is "ON"
and infinite when "OFF"?
CANON NP6320 REV.0 DEC. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
YES/
Action
ON
NO Plug it in.
NO Close the door or the
cover.
NO Explain to the user that
the problem is not in the
copier.
YES Check from step 6.
NO Press the button on the
circuit breaker; then,
check continuity again. If
the resistance is still not
0Ω, replace the circuit
breaker (CB1).
YES Check the power cord.
NO Replace the door switch
(DS1).
NO Replace the power
switch (SW1).
YES Check the AC power line
wiring and connectors.