Lg tv power problem | Eht supply voltage discharge | power led not glowing.
Автор: Cosmic Electronics
Загружено: 2023-05-07
Просмотров: 11685
Lg tv power problem .
LG TV 21''ULTRA SLIM PCB.
MAIN IC TDA12155PS/N3/3.
FBT BSC15-N0304.
VERTICAL IC TDA4865A.
SOUND IC TDA7297SA.
AV IC LA7958N.
WIDTH IC KIA4558A.
STR 6554A.
SOLUTION:
1.Power on/Check eht supply voltage-------Automatically discharge.
2.Check main power filter condensor voltage----ok
3.Power off/Discharge main power filter condensor by bulb.
4.Add 100W bulb at eht supply.
5.Power on/Check 10V supply from SMPS output------no genarate voltage.
6.Check sound supply voltage--------ok.
7.Power off/Open bulb wire ----------Again discharge main power filter condensor by bulb.
8.Check 10V supply diode---ok.
9.Check 10V supply fusible registor-----------no continuity.
10.Add a 1 ohms registor on fusible registor.
11.Then------------
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