Canon LV-7545U, Service Manual

Page: 27 / 130

Part 2: Repair Information
2-2
2. CIRCUIT PROTECTIONS
This projector is equipped with the following circuit protections to operate in safety. If
the abnormality occurs inside the projector, it will automatically turn off by operating
one of the following protection circuits.
2.1 Fuse
The fuse is located inside of the projector.
When either the LAMP indicator or the
READY indicator is not illuminated, a fuse
may be opened. Check the fuse according to
the following steps. The specified fuse should
be used as follows;
[How to replace the fuse]
1. Remove the cabinet top according to step
1 of "Service (Mechanical Disassembles)".
2. Remove the fuse from fuse holder.
To install the fuse, take reversed step in the above.
2.2 Thermal Switch
When the internal temperature of the
projector reaches near 90˚C, the thermal
switch (SW905) turns off the AC main power
supply automatically.
(Check the resistance between the terminals
of the thermal switch by using a tester. If it is
open, the thermal switch may be in
operative.)
Reset the thermal switch according to the
following procedure.
[How to reset the thermal switch]
1. Remove the cabinet top according to step
1 of "Service (Mechanical Disassembles)".
2. Press the reset button on the thermal switch.
Fuse Part No. DY4-6319-000 (250V 6.3A)
Before pressing the reset
button, disconnect the AC
cord from the projector.
CAUTION
Fig. 2-2
Fig. 2-1
Fuse
Filter unit
Lamp cover