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LC-20SD4E (serv.man2). Part 2 - Sharp TV Service Manual (repair manual). Page 11

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TROUBLESHOOTING GUIDE
E-2
THE PICTURE DOES NOT
APPEAR (1).
CONNECT CD7201.
YES
IS CD7201 CONNECTED ?
NO
YES
CHANGE CP7201.
IS THERE SIGNAL
AT IC7201 ?
CHANGE IC7201.
IS THERE SIGNAL
AT CP7201 ?
NO
YES
CHECK IC801.
OR CHANGE SCALER PCB.
NO
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