Рет қаралды 48,632
LG TV 21"NORMAL PCB
MAIN IC TDA12135PS/N3/3/AL6
EHT 6174V-6006M/6006N/N1682
VERTICAL IC TDA4863
SOUND IC TDA7297SA
AV IC LA7958N
STR W6554A
NO PICTURE /ABL PROBLEM
1.Power on/Check ABL voltage at eht pin------ok.
2.Registor R411(1K) output voltage-----ok.
3.Registor R408(5.6K) output voltage-----ok.
4.Check diode D510(IN4148) cathode voltage-----ok.
5.Check diode D510(IN4148) anode voltage------- missing.
6.Power off/Measure diode D510(IN4148)-----ok.
7.Check ohms at anode (D510-IN4148) -------low.
8.Check ohms at main ic pin No.48(ABL)-----low.
9.Open main ic pin 48 from pcb.
10.Again check ohms pin No.48----low ohms-----main ic defective
11.First open eht,because spark it.
12.Open FBT.
13.Set new FBT.
14.Open main ic TDA12135PS/N3/3/AL6
15.Set 64 pin base.
16.Set new ic TDA12135PS/N3/3/MB5.
17.Then------