The Scanning Lamp Fails To Turn On - Canon NP6330 Service Manual

32

The scanning lamp fails to turn on.

Cause Step
Scanning lamp 1
(LA1)
Fuse (FU1) 2
Lamp 3
AC power 4
supply
Lamp regulator 5
DC controller
PCB
COPYRIGHT © 1997 CANON INC.
Checks
Turn off the power switch, and
disconnect the power plug. Is the
lamp installed properly?
Set the meter to the x1K
and connect its probes to both
terminals of the fuse. Does the
index of the meter swing?
Disconnect the connector J4, and
connect the probes of the meter
to both terminals of the lamp. Is
there electrical continuity?
Is there AC power between J601-
1 and J601-2 on the lamp
regulator?
Replace the lamp regulator. Is the
problem corrected?
CANON NP6330 REV.0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 11 TROUBLESHOOTING
YES/NO
NO Re-install the lamp.
range, NO Replace the fuse.
Caution:
The lamp may have
turned on wrongly, the
fuse may have been
mounted incorrectly, or
the cooling fan may
have failed to operate;
be sure to find out the
cause after replacement.
YES Check the wiring from J4
to the lamp; if normal,
replace the lamp.
NO See "AC power is
absent."
YES End.
NO Replace the DC
controller PCB.
Action
11-95