19” LCD Color Monitor 190V7
47
Inverter Board
No power
Check C811 (+) =12V
NG
OK
Check adapter section
Check ON/OFF signal
Check Interface section or main board
NG
OK
Check U811 pin 2=12V?
NG
OK
Check Q801
Check U811 Pin1/pin15 have the output of sawtooth wave at short time
NG
OK
Check U811 pin 5/pin6
NG
OK
Replace U811
Check Q821/Q841 pin5/pin8 is 12V?
Check PT801/PT802 pin7/pin8= 650V?
Cut all the pin connector of Q821/Q841, check C811 (+)=12V?
OK
NG
Unplug backlight connector wire, check
PT801/PT802 pin7/pin8 = 650V?
OK
NG
Replace backlight
Replace PT801/PT802
OK
NG
NG
Replace Q821/Q841
Check Q801
OK
Содержание 190V7
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Страница 17: ...19 LCD Color Monitor 190V7 17 5 Block Diagram 5 1 Monitor Exploded View ...
Страница 21: ...19 LCD Color Monitor 190V7 21 5 3 2 Inverter Power Board ...
Страница 29: ...19 LCD Color Monitor 190V7 29 7 PCB Layout 7 1 Main Board 715G1767 1 ...
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Страница 32: ...19 LCD Color Monitor 190V7 32 7 2 Power Board 715G1813 1 ...
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Страница 34: ...19 LCD Color Monitor 190V7 34 7 3 Key Board 715G1755 1 ...
Страница 40: ...19 LCD Color Monitor 190V7 40 Fig 13 Fig 14 ...
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Страница 53: ...19 LCD Color Monitor 190V7 53 e Until appears the follow Fig writer completed ...
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Страница 58: ...19 LCD Color Monitor 190V7 58 d Unit appears the following Fig writer completed ...