CHAPTER 13 TROUBLESHOOTING
The scanning lamp fails to turn on.
switch (TP1, TP6)
AC power supply
COPYRIGHT © 1999 CANON INC.
Turn off the power switch, and
disconnect the power plug. Is the
lamp mounted properly?
Check both terminals of the
scanner thermal switch. Is there
Disconnect J11 (3-pin) of the lamp
regulator, and set the meter range
to 1 k
Dose the index swing
when the probe is connected to J11
on the harness side?
Is there electrical continuity on the
fuse inside the lamp regulator?
Connect J11, and disconnect J9 (4-
pin). Connect the connector, and
turn on the power. Set the meter
range to 300 VAC, and measure the
voltage between J9-1 and -4 on the
harness side. Is the rated AC power
CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Mount the lamp
Replace the thermal
· If the lamp has turned
on wrongly, the
thermal switch may be
mounted wrongly or
the cooling fan may
have failed to turn on.
Be sure to find out the
Check the wiring from
J11 to the lamp; if
normal, replace the
Replace the lamp
· Check to make sure
that the lamp and the
harness do not have a
See "AC power is