20” LCD TV Color Monitor
AOC L20S421
23
5. No Sound
Check the source
Reset source
Check signal filter circuit
NG
Replace the filter or inductance
Check TU100
Replace TU100
AV, component, S-video, PC signal
Check Amplifier TDA7266D U601
Replace U601
Check Earphone jack
Replace the Earphone jack
Check speakers
Replace speakers
Check relative circuit
No sound
OK
NG
OK
NG
OK
NG
OK
OK
NG
NG
OK
NG
OK
NG
Check TV system setup
SIF signal
Содержание Envision L20S421
Страница 27: ...20 LCD TV Color Monitor AOC L20S421 27 6 Remove the 15 screws to remove the bezel ...
Страница 28: ...20 LCD TV Color Monitor AOC L20S421 28 7 Remove the ten screws to remove the main frame ...
Страница 29: ...20 LCD TV Color Monitor AOC L20S421 29 8 Exploded View ...
Страница 58: ...20 LCD TV Color Monitor AOC L20S421 58 10 PCB Layout 10 1 Main Board 715T1802 1 ...
Страница 59: ...20 LCD TV Color Monitor AOC L20S421 59 ...
Страница 60: ...20 LCD TV Color Monitor AOC L20S421 60 10 2 Power Board 715T1811 2 ...
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Страница 62: ...20 LCD TV Color Monitor AOC L20S421 62 ...
Страница 63: ...20 LCD TV Color Monitor AOC L20S421 63 10 3 Tuner Board 715T1747 1 ...
Страница 64: ...20 LCD TV Color Monitor AOC L20S421 64 ...
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Страница 66: ...20 LCD TV Color Monitor AOC L20S421 66 10 4 IR Board 715T1817 1 ...
Страница 67: ...20 LCD TV Color Monitor AOC L20S421 67 10 5 Headphone Board 715T1381 2 10 6 Key Board 715T1822 1C ...