Sanyo PLV-WF10 - Page 31

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LAMP BALLAST-ON/OFF
PFC-ON/OFF
PRESSURE
SENSOR
TEMP.
SENSOR
CIRCUIT
POWER
FAILURE
LAMP-MONITOR
LAMP
BALLAST units
LAMP
assemblies
PFC units
TEMP.
SENSOR
TEMP. SW
THERMAL-Switches
for LAMP assemblies
TEMP. SW
RL-12V
+B
D0 ~ D15
TEMP.
SENSOR
RESET
SWITCH
HAND OPERATED RESET
for CPU SW3801
FOR FAN CONTROL
IC5801
ABNORMAL TEMP. DETECT
IC2541
FOR FAN CONTROL
IC886
ABNORMAL TEMP. DETECT
PTH901
The PTH901 does not exist
in some particular models.
IIC-SCL & SDA
IIC-SCL & SDA
RESET
TEMP. SENSOR
PRESSURE SENSOR
DATA BUS
BUFFER
POWER
FAILURE
Does the temperature
switch operate?
If the temperature around FET
reaches 85 degrees, a PFC
circuit will be shut down.
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.
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.
■ The CPU shuts down the projector
compulsorily.
CPU performs temperature check
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
TEMPERATURE WARN-
ING
indicator at intervals of 0.6 seconds.
■ 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.
Temperature sensors location can be
seen “protections” on page 5.
Any of the projector models
are not equipped with the
PTH901.