-43-
7
P.F.C.
control
P.F.C.
SW903
+15V
Abnormal temperature detection
at the periphery of LCD panel
SW904
Interlock SW
Abnormal temperature detection
at the periphery of LAMP
Abnormal temperature
detection at the
periphery of P.F.C.
circuit
TSW601
LAMP
Q661
Q662
RL601
RL602
Lamp power
relay
Is projection of lamp cover
inside broken or not fitting?
Check the INTER LOCK
switch(SW902) and lamp
cover.
SW902 OPEN : abnormal
Is thermal switch(SW903) oper-
ating?
If temperatures periphery of
LAMP reaches 100˚C,
SW903 OPEN: abnormal
Is thermal switch(SW904)
operating?
If temperatures periphery of
LCD panel
reaches 50˚C ,
SW904 OPEN: abnormal
Is thermal switch(TSW601) operating?
If temperature periphery of P.F.C.
circuit reaches 85˚C, the
thermal switch turns on.
TSW601--------------- OPEN: normal
K7D
K7E
Lamp
monitor
Lamp
det.
When an abnormal
temperature is detected at
the periphery of lamp
driver circuit, the voltage of
this line comes HIGH.
When an abnormal
temperature is detected at
the periphery of lamp
driver circuit, the voltage of
this line comes LOW.
the thermal switch turns off.
the thermal switch turns off.
LAMP BALLAST UNIT
Troubleshooting
Summary of Contents for PLC-EF10BA
Page 55: ... 54 IC Block Diagrams AV9155C OSC IC3301 IC3321 CIP3250A Component Interface Processor IC102 ...
Page 58: ... 57 IC Block Diagrams ML60851ATB USB Controller IC3801 MPC948FA Clock Driver IC3341 ...
Page 59: ... 58 IC Block Diagrams M62358FP DAC IC1401 VPC3215C Digital Video Processor IC101 ...
Page 60: ... 59 IC Block Diagrams MB40988PFQ D A Converter IC1181 MSM54V16258 DRAM IC2301 IC2311 ...
Page 61: ... 60 IC Block Diagrams CXA2016S Sync Separator IC4141 TC4052BF Sync Separator IC4141 ...
Page 66: ... 65 TDA8395T SECAM Decoder IC6103 IC Block Diagrams ...
Page 109: ...Nov 99 1300 SI Printed in Japan SANYO Electric Co Ltd ...