Sanyo PLV-WF10 Service Manual page 31

Does the temperature
switch operate?
If the temperature around FET
reaches 85 degrees, a PFC
circuit will be shut down.
PFC units
POWER
FAILURE
CIRCUIT
POWER
FAILURE
BUFFER
The CPU controls Air flow.
CPU checks the temperature and
atmospheric pressure inside a pro-
jector. And CPU controls the drive
power of the cooling fans so that
the temperature inside the projec-
tor may be maintained to normal
temperature.
Does the temperature switch
operate?
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.
TEMP. SW
LAMP
BALLAST units
RL-12V
The CPU shuts down the projector
compulsorily.
CPU performs
around the LCD panel using tempera-
ture sensor IC2561 (B-side of assembly
main). If this temperature reaches 47
degrees, CPU will turn off a projector,
and will blink
ING indicator at intervals of 0.6 seconds.
TEMP. SW
LAMP
assemblies
THERMAL-Switches
for LAMP assemblies
Do the temperature switches operate?
Temperature switches are arranged near each lamp. If a tem-
perature of lamp reaches an unusual temperature, the
temperature switch will operate.
The lamp ballast units shut down, then the projector
is turned off when the temperature switches operate.
Note :
The CPU does not check operation of temperature
switches. Therefore, the TEMPERATURE WARN-
ING indicator does not blink when the temperature
switches operate and the projector is shut down.
RESET
IIC-SCL & SDA
PRESSURE SENSOR
IIC-SCL & SDA
TEMP. SENSOR
temperature check
TEMPERATURE WARN-
-31-
+B
RESET HAND OPERATED RESET
SWITCH for CPU SW3801
FOR FAN CONTROL
TEMP.
IC5801
SENSOR
FOR FAN CONTROL
PRESSURE
IC886
SENSOR
ABNORMAL TEMP. DETECT
TEMP.
IC2541
SENSOR
TEMP.
ABNORMAL TEMP. DETECT
SENSOR
PTH901
The PTH901 does not exist Any of the projector models
in some particular models.
are not equipped with the
PTH901.
Temperature sensors location can be
seen "protections" on page 5.