SAMSUNG TV 21"NORMAL PCB
MAIN IC TDA11136PS/N3/3
EHT AA26-00238A
VERTICAL IC LA78141
SOUND IC TDA7297SA
VIDEO IC TDA6107JF
STR W6750F
1.Power on/Check vertical ic pin voltages------ok.
2.Check memory ic supply voltage------ok.
3.Check SCL voltage-------ok.
4.Check SDA voltage-------ok.
5.Check 8V regulator transistor output voltage-------ok.
6.Check 3.3V regulator transistor output voltage------ok.
7.Check voltage main ic pin No.14(VDRA)-------ok.
8.Check voltage main ic pin No.15VDRAB)------ok.
9.Power off/Open vertical ic LA78141 all pin.
10.Power on/Again check VDRA voltage-------ok.
11.Check VDRB voltage-------low.
12.Power off/Check ohms R219(39K)-----Registivity high(pin No.10----IREF).
13.Open registor R219(39K).
14.Set new registor 39K.
15.Power on/Theen-------