Part 2: Repair Information
2-4
3. CIRCUIT PROTECTIONS
This projector is equipped with the following circuit protections.
3.1 Fuse
A fuse is attached to the power supply.
When the LAMP indicator or the READY
indicator is illuminated, the fuse is normal.
Check the fuse as follows:
1. Remove the power supply unit according
to the servicing procedure.
2. Remove the fuse and check it with a
multimeter.
3.2 Temperature Protection equipment
To protect circuitry and optical components from abnormal rise of the internal
temperature, the following temperature
protections are provided:
1) Thermal Sensor Circuit
If the internal temperature of the projector
rises excessively, the WARNING TEMP.
indicator flashes and the cooling fan starts to
run to cool the projector. When the
temperature becomes normal, the indicator
stops flashing. If it does not stop, unplug the
AC cord from the outlet and check and clean
the air filter. If the indicator still flashes,
inspect the inside (cooling fan, etc.) of the
projector.
Fuse 250V
6.3A
AA
Part No. DY4-5918-000
The specified fuse should
be used. Using an
unspecified fuse may cause
fire or electric shock.
CAUTION
Fig. 2-2
Fig. 2-3
Fuse
Power supply unit
Reset button
Thermal switch
(SW902)
Summary of Contents for D78-5241
Page 8: ...Part 1 General Information ...
Page 23: ...Part 2 Repair Information ...
Page 35: ......
Page 36: ...Part 3 Adjustment ...
Page 47: ...Part 4 Parts Catalog ...
Page 48: ......
Page 56: ...U 1 U 2 Z V 1 Page 4 CANON LV X1J LV X1U LV X1E REF No D78 5241 D78 5242 D78 5243 Y X ...
Page 59: ......
Page 60: ...Part 5 Electrical Diagrams ...