Sharp Aquos LC-60LE450U, Service Manual

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Sharp LC-60LE450U/LC-60LE452U Service manual
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5.4.2 Function Troubleshooting
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OK
OK
OK
NG
1.Repair U7 timing circuit
2.Repair U3 timing circuit
1.Check U7 timing signal
2.Check U3 timing signal
1.Repair U7 or U3 I2C circuit
2.Check the connection of U7 or U3
3.Change U7 or U3
1.Check U7 I2C
2.Check U3 I2C
1.Repair the U5 voltage (3.3V)
2.Repair the U7 voltage (3.3V)
1.Check the U5 voltage (3.3V)
2.Check the U7 voltage (3.3V)
Debug RF
signal machine
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Channels
Check RF signal
OK
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OK
1.Check the connection of U7
2.Check the connection of U3
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1. Welding U7
2 .Welding U3
OK
Change U3