Canon CP660 Service Manual page 329

2 DC power is absent in the printer unit. (+5V, +24 VB)
Cause Step
AC power 1
(printer unit)
Fuse (power 2
supply of the
printer unit)
Power supply 3
(printer unit)
Wiring/DC
load, DC con-
troller PCB
Note:
The printer unit power switch (SW1) is blocked by a face cover after turning on the
printer unit at time of installing the reader unit. Do not touch unless this step must be
performed. Be sure to turn it on, and attach the face cover after the work.
COPYRIGHT © 1999 CANON INC.
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Checks
Disconnect the power plug from the
printer unit, and connect it to the
power plug directly. Is AC power pre-
sent?
Turn of the printer unit power
switch1; in about 2 min, turn it on. Is
the operation normal?
Turn off the printer unit power switch
(Note 1), and disconnect the con-
nector J204 from the DC controller
PCB. Connect the printer unit power
plug to the power outlet directly, and
turn on the printer unit power switch.
Is DC power (+5 V) present at the
connector J204-1? (See Note 1.)
CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 10 TROUBLESHOOTING
Yes/No Action
NO See 3. "AC power is
absent in the printer
unit."
NO Replace the fuse of the
power supply of the
printer unit.
NO Replace the printer unit
power supply.
YES Check the wiring from
the DC controller PCB;
if normal, replace the
DC controller PCB.
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