-37-
Troubleshooting
7
P.F.C.
control
P.F.C.
SW902
SW904
Abnormal temperature detection at the
periphery of optical unit.
SW901
Interlock switch
TSW611
LAMP
CB2
CB2
LAMP.DET
LAMP
SW.
When an abnormal
temperature is detected at
the periphery of lamp
driver circuit, the voltage of
this line comes HIGH.
When projector turns on,
LAMP SW signal comes
LOW.
LAMP BALLAST UNIT
Abnormal temperature
detection at the
periphery of P.F.C.
circuit
Check that the thermal switch (TSW611)
is operating.
If temperature at peraiphery of P.F.C.
circuit reaches 90˚C, TSW611 turns on.
TSW611 -- OPEN: Normal
Is thermal switch (SW901)
operating ?
If peripheral temperatures at
the optical unit reaches 85˚C,
the thermal switch turns off.
SW901 -- OPEN: abnormal
Is projection of lamp cover inside
broken or not fitting correctry ?
Check the interlock switch (SW904)
and lamp cover.
SW904 -- OPEN : abnormal
Is thermal switch (SW902) operating ?
If peripheral temperatures at the lamp
house reaches 100˚C, the thermal
switch turns off.
SW902 -- OPEN: abnormal
SW901
Summary of Contents for PLC-SU20B
Page 45: ... 45 TPDVS V SYNC TPDHS H SYNC TP3571 NRS ...
Page 49: ... 49 IC Block Diagrams CXA2111R LCD Driver IC401 CXA2112R Sample Hold IC501 IC531 IC561 ...
Page 51: ... 51 IC Block Diagrams IDT71V016S RAM IC805 LA7217M Sync Separator IC6131 ...
Page 52: ... 52 IC Block Diagrams LB1641 Motor Drive IC5501 IC5551 LC4105V Buffer IC3501 IC3521 IC3541 ...
Page 53: ... 53 IC Block Diagrams M62358FP DAC IC431 MB40988PFQ D A COnverter IC2200 ...
Page 54: ... 54 IC Block Diagrams MC14538BF IC7201 MPC948FA Clock Driver IC1302 ...
Page 58: ... 58 TDA9178T Picture Improvement IC121 IC Block Diagrams ...
Page 81: ...Ref No Part No Description Ref No Part No Description 81 Electrical Parts List ...
Page 84: ...Mechanical Parts List 84 CHASSIS PARTS 24 45 24 72 73 71 57 45 45 45 46 46 46 46 51 51 51 ...
Page 85: ... 85 Mechanical Parts List 32 59 33 58 25 34 28 60 27 45 45 45 45 45 45 ...
Page 88: ...Feb 2000 1300 SI Printed in Japan SANYO Electric Co Ltd ...
