Sharp LC-26SH10U Service Manual - Page 20
Or Change Scaler Pcb. - troubleshooting
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TROUBLESHOOTING GUIDE THE PICTURE DOES NOT APPEAR (1). DOSE BACK LIGHT SHINE ? NO YES IS THERE VOLTAGE AT NO PINS 1, 2, 3, 4 AND 5 OF CP505 24V ? YES CHECK IC502, T502 AND PERIPHERAL CIRCUIT. NO IS CD7204 CONNECTED ? YES IS THERE SIGNAL AT CP7203 ? NO YES IS THERE SIGNAL NO AT IC7201 ? YES CHECK IC801. OR CHANGE SCALER PCB. CONNECT CD7204. CHANGE V2301. CHANGE IC7201. E-2
TROUBLESHOOTING GUIDE
E-2
THE PICTURE DOES NOT
APPEAR (1).
NO
YES
CONNECT CD7204.
NO
YES
IS CD7204 CONNECTED ?
DOSE BACK LIGHT SHINE ?
YES
NO
CHANGE V2301.
IS THERE SIGNAL
AT IC7201 ?
CHANGE IC7201.
IS THERE SIGNAL
AT CP7203 ?
NO
YES
CHECK IC801.
OR CHANGE SCALER PCB.
CHECK IC502, T502 AND
PERIPHERAL CIRCUIT.
NO
YES
IS THERE VOLTAGE AT
PINS 1, 2, 3, 4 AND 5
OF CP505 24V ?