27’’ LCD TV Norcent LT2790BK
21
5. Repair Flow Chart
5.1 Abnormal display
CHECK CON901 PIN9
=
12V
CON905 PIN3=5V?
Check POWER BOARD
NG
OK
CHECK CN407 PANEL connect is
normal?
Reconnect CN407
NG
CHECK X401
、
X701 is normal?
Check surge circuit
CHECK U108 PIN18, PIN17, PIN14 output wave is OK;
PIN9 PIN20 power supply is OK?
CHECK U401 PIN R5
、
PIN T8=3.3V?
U401 PIN E6=2.5V? PIN R9=1.8V?
CHECK SCALER power
Check Tuner circuit
Check TV mode display is normal?
CHECK I²C1DATA, CLK is normal?
CHECK SCALER HS VS is normal?
OK
OK
OK
OK
OK
OK
NG
NG
OK
OK
Содержание LT2790BK
Страница 4: ...27 LCD TV Norcent LT2790BK 4 1 General Specifications...
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Страница 7: ...27 LCD TV Norcent LT2790BK 7 2 3 OSD Operations...
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Страница 14: ...27 LCD TV Norcent LT2790BK 14 2 4 How to Connect...
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Страница 20: ...27 LCD TV Norcent LT2790BK 20 Remove the screws remarked in red...
Страница 25: ...27 LCD TV Norcent LT2790BK 25 7 PCB Layout 7 1 Main Board...
Страница 26: ...27 LCD TV Norcent LT2790BK 26...
Страница 27: ...27 LCD TV Norcent LT2790BK 27 7 2 Power Board...
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Страница 29: ...27 LCD TV Norcent LT2790BK 29 7 3 Key Board 7 4 IR Board...
Страница 30: ...27 LCD TV Norcent LT2790BK 30 8 Block Diagram 8 1 Main board...
Страница 53: ...27 LCD TV Norcent LT2790BK 53 10 Exploded View...