Crt tv vertical section problem | Videocon tv vertical section problem.
Автор: Cosmic Electronics
Загружено: 2023-02-26
Просмотров: 8502
Crt tv vertical section problem.
VIDEOCON TV 14''NORMAL PCB.
MAIN ICTDA12135PS/N3/3/AE2.
FBT BSC24-01N4095I/0126.
VERTICAL IC LA78040B.
SOUND IC TDA7297.
VERTICAL SECTION PROBLEM.
1.Power on/Check vertical ic all pin voltages.
2.Replace vertical ic-----------no result.
3.Check voltage main ic pin 14(VDRA)-------abnormal.
4..Check voltage main ic pin 15(VDRB)-------abnormal.
5.Power off/Open the registorR301 & R307(100 ohms) one lid.
6.Power on/Again check voltages pin 14-----abnormal and pin 15----ok.
7.Power off/Open capacitor C312(103/10K) main ic pin 14(VDRA) line.
8.Power on/Again check voltage pin 14---ok and pin 15----ok.--------defective the capacitor(C312---103/10K).
9.Then----------
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