Рет қаралды 21,978
How to repair onida ultra slim tv no picture.
ONIDA TV 21"ULTRA SLIM PCB
SMD IC R2J10171GA-A88FP
EHT BSC25-2292
VERTICAL IC LA78141
SOUND IC TDA7297SA
STR G8656
NO PICTURE,NO DISPLAY,
LOW LIGHT,RETRACE LINES.
Solution:
1.Power on/Check abl voltage-----ok.
2.Check abl line diode D502 anode voltage-----missing.
3.ABL line tracing from eht to main ic.
4.Maybe defective-----
a.Main ic.
b.Capacitor C115(103).
c.Supply SMD register (R502---270K).
d.Condensor (4.7mf/63V).
e.SMD register R504(2.2K).
5.Open register R523(100 ohms) one lid.
6.Power on/Check voltage this point------missing.
7.Power off/Resolder this register.
8.Next open capacitor C115(103) one lid.
9.Power on/Check voltage this line----ok.
10.Power off/Open this capacitor C115(103).
11.Then-------