ONIDA TV 14"ULTRA SLIM PCB.
CHIP IC TDA12135H/N3/3
EHT BSC23-N0151
VERTICAL TDA4865AJ
SOUND IC TDA 42102
STR G8656
STANDBY PROBLEM
1.Power on/Measure 3.3V regulator voltage------ok.
2.Check 5V regulator voltage------nil.
3.Check 8V regulator voltage------nil.
4.Check standby release transistor collector voltage--nil.
But Base emitter voltage ok.
5.Check memory IC supply voltage---ok.
6.Check SCL,SDA voltage-- SDA voltage missing.
7.Power off/Open SCL SDA point from tuner.
8.Power on/Again measure SDA voltage---- same result.
9.Power off/Check zener D131(5.1V)---ok(SCL).
10.Check D130(5.1V)----short(SDA)..
11.Open zener diode D130(5.1V).
12.Measure zener diode by multimeter----Short.
13.set new zener diode 5.1V.
14.power on/Check SDA voltage----ok.
15.Check SCL voltage---ok.
16.Then------.

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