Question about Sanyo DS31520 31" TV
Tv is about 3 years old and was working fine until one day when it went dead for no reason. now all it does is makes a high pitch noise and none of the controls work and the screen is black. any ideas???
I have this same set and found that q605 and 608 in startup curcuit was short
Posted on Aug 06, 2006
If still under warranty or if you have no electronic repair experience you should take the set back to the shop or to a repair person. Some of the solutions described below can be dangerous, TV's are very hazardous to service. Even when plugged out, TV's can store very high voltages. Squealing noise is from the power supply teling you that there is an overload condiction. The overload is shifting the operational frequency of the power supply into upper audio hearing range. Check the diodes and caps in the supply circuit and the active components in the deflection circuit. also resolder the LOPT, h-output, h-driver, and h-driver transformer. Good luck
Posted on Jun 21, 2006
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