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

32

The scanning lamp fails to turn on.

Cause Step
Scanning lamp
(LA1)
Fuse (FU1)
Lamp
AC power
supply
Lamp regulator
DC controller
PCB
COPYRIGHT © 1997 CANON INC.
Download Service Manual And Resetter Printer at http://printer1.blogspot.com
Checks
1 Turn off the power switch, and
disconnect the power plug. Is the
lamp installed properly?
2 Set the meter to the x1KΩ range,
and connect its probes to both
terminals of the fuse. Does the
index of the meter swing?
3 Disconnect the connector J4, and
connect the probes of the meter
to both terminals of the lamp. Is
there electrical continuity?
4 Is there AC power between J601-
1 and J601-2 on the lamp
regulator?
5 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 Action
NO Re-install the lamp.
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.
11-95