LAMP B
ALLAST
-ON/OFF
PFC-ON/OFF
PRESSURE
SENSOR
TEMP.
SENSOR
CIRCUIT
POWER
FAILURE
LAMP-MONIT
OR
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
D
ATA
B
U
S
BUFFER
POWER
FAILURE
-39-
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.
Summary of Contents for PLC-XF45
Page 69: ... 69 CXA3562R LCD DRIVER FF ...
Page 107: ...SANYO Electric Co Ltd Jan 2003 Printed in Japan ...
Page 147: ...Diagrams Drawings MW8 XF4500 ...