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Has not the temperature
switch operated?
If the temperature around
FET reaches 85 degrees, a
PFC circuit will be shut down.
Has not the temperature switch
operated?
When the temperature around a
lamp driver reaches 85 degrees, unit
lamp ballast will be shut down and a
lamp monitor signal changes from L
to H.
Have not the temperature switches operated?
Temperature switches are arranged near each lamp.
Temperature switches will operate, if temperature reach-
es 85 - 90 degrees.
When temperature switches have operated, lamp ballast
units will be shut down, then a projector will be turned off.
■ Note :
CPU does not check operation of temperature switches.
Therefore, when temperature switches have operated
and a projector has shut down, TEMPERATURE-
WARNING indicator does not blink.
Temperature sensors location can see
it on "protections"( page-5).
❐ Cooling fans drive power control.
CPU checks the temperature and atmo-
spheric pressure inside a projector. And
CPU controls the drive power of the cool-
ing fans so the temperature inside the pro-
jector is maintained to normal temperature.
❐ Projector shut down.
CPU performs temperature check
around the LCD panel using tempera-
ture sensor IC2541 (B-side of assembly
main). If this temperature reaches 47
degrees, CPU will turn off a projector,
and will blink TEMPERATURE WARN-
ING indicator at intervals of 0.6 sec-
onds.
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