Рет қаралды 32,094
LG TV 14"NOMAL PCB
MAIN IC TDA11105PS/N3/3/AN4
EHT 6174V-6006N
VERTICAL IC LA78040
SOUND IC TDA7297SA
STR W6754
SYNC PROBLEM
1.Open main ic TDA11105PS/N3/3/AN4.
2.Set new ic.
3.Power on/Other fault appear.
4.Check 3.3V main ic supply----ok.
5.Check 5V main ic supply----ok.
6.Check 8V main ic supply------ok.
7.Check H OUT pin voltage main ic-----ok.
8.Check R507(39K) input voltage-------ok.
9.Check R507(39K) output voltage------present but high.
10.Power off/Open ground register R508(33K).
11.Check the register 33K---registivity high.
12.Open the register 33K.
13 Again measure register 33K-----value high.
14.Set new register 33K.
15.Power on/Again check R507(39K) input voltage----ok.
16.Check R507 output voltage-----ok
17.Discussion circuit diagram.
18.Then------