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Troubleshooting
Is
thermal
operating?
If temperatures periphery of
LCD panel is reach 55˚C ,
turn off the thermal switch.
SW904
OPEN: abnormal
+15V
SW903
Abnormal temperature detection
at the periphery of LAMP
7
Lamp power
relay
RL601
RL602
Q661
Q662
switch(SW904)
Abnormal temperature detection
at the periphery of LCD panel
SW904
Is projection of lamp cover
inside broken or not fitting?
Check the INTER
LOCK
switch(SW902)
and
lamp
cover.
SW902 OPEN : abnormal
Interlock SW
Is thermal switch(SW903) oper-
ating?
If temperatures periphery of
LAMP is reach 100˚C , turn off
the thermal switch.
SW903
OPEN: abnormal
Abnormal temperature
detection at the
periphery of P.F.C.
circuit
TSW601
P.F.C.
control
P.F.C.
Is thermal switch(TSW601) operating?
If temperatures periphery of P.F.C.
circuit is reach 85˚C , turn on the
thermal switch.
TSW601--------------- OPEN: normal
Abnormal temperature
detection at the
periphery of chopper
circuit
SW702
Chopper
control
Chopper
ASSY. LAMP BALLAST
Is thermal switch(SW702)
operating?
If temperatures periphery of
chopper circuit is reach 90
˚C
, turn off the thermal
switch.
SW702 OPEN: abnormal
-43-
Lamp
Abnormal temperature
monitor
detection at the
periphery of lamp driver
circuit
SW701
Lamp
driver
LAMP
Is thermal switch(SW701)
operating?
If temperatures periphery of
lamp driver circuit is reach
85˚C
, turn on the thermal
switch.
SW701 OPEN: normal
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