Sharp LC-26SH10U Service Manual - Page 19
Troubleshooting Guide
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TROUBLESHOOTING GUIDE POWER DOES NOT TURN ON IS F501 BROKEN ? YES NO IS THERE VOLTAGE NO AT PIN 4 OF IC503 20.5V ? YES IS THERE VOLTAGE NO AT PIN 4 OF IC506 AT5V ? YES IS THERE VOLTAGE NO AT PIN 2 OF IC3804 AT3.3V ? YES CHANGE SCALER PCB. CHANGE F501. CHECK IC503 AND PERIPHERAL CIRCUIT. CHECK IC506 AND PERIPHERAL CIRCUIT. OR CHANGE POWER PCB. CHECK IC3804 AND PERIPHERAL CIRCUIT. OR CHANGE AV PCB. E-1
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TROUBLESHOOTING GUIDE
E-1
POWER DOES NOT TURN ON
NO
IS F501 BROKEN ?
YES
CHANGE F501.
NO
YES
CHECK IC503 AND
PERIPHERAL CIRCUIT.
NO
CHECK IC3804 AND
PERIPHERAL CIRCUIT.
OR CHANGE AV PCB.
NO
YES
CHECK IC506 AND
PERIPHERAL CIRCUIT.
OR CHANGE POWER PCB.
YES
CHANGE SCALER PCB.
IS THERE VOLTAGE
AT PIN 2 OF IC3804
AT3.3V ?
IS THERE VOLTAGE
AT PIN 4 OF IC506
AT5V ?
IS THERE VOLTAGE
AT PIN 4 OF IC503
20.5V ?