Sanyo avm 1909s has a buzzing sound
The buzzing sound from your TV indicates that it LOY [Line Output Tranformer] has damaged. You have to open your tv and must have some knoledge in electoncis to retify this fault. Whe LOT said above is replaced, you have to replace its drive transistor also. Whe LOT getd damaged, the transistor that drives that will also get dameged. Therefore, when we replce the LOT, we have to replace the drive transistor also.
You just replace the its drive transistor first. After replacing it, just switch ON the Tv for a short time, say about 30 seconds or so, swtich it OFF, unplug it from mains supply, and check the heat of the above said transistor by bare figure touch. It may get warm, but not hot. If it overheats, it is an indication for you that the LOT is damaged and must be replaced wit same type annd number.
The horizontal out put transistor can be located very nere to LOT, and a three terminal component, look like a power transistor screwed on to a metal plate to radiate heat away from it, will be very close to the above said LOT.
Replace it first, and see the effect. If you wants further assistance frome me, get me through Fixya. Ok.
on Jan 06, 2011