Question about Televison & Video
I got two of these tv's which i tried to auto-tune,both just showing flashing led. i be very grateful for any advice/solution, thank you. john.
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Posted on Jan 02, 2017
SOURCE: hi, I have a Acustic
When we do autotuning to any kind of TV, it automatically tunes to to the entire TV frequency spectrum, and stores each channel information in voltage forms in a memory Ic called Eraseable Programable Read Only Memory [EPROM]. In some sets, this part of the circuit mey built inside the command Ic, and in some otheres, there will be a seperate Ic used for it; called memory Ic. When we tuned in, all station iformations are converted into digital form, and stroed inside each memory positon of this Ic and will be regained when we chage each channels later.
In your TV combo, this memory section has damaged, and it doesnt store anything during tuning process.
You just open it and see whether a seperate Ic is used for this purpose or not. If it is, the things are easy, because it will be an Ic, which will have only 8 or 10pins to desoder it. it can be located very near to system control Ic. If there is no such Ic is, that means the system control Ic itself contains this portion inside, and the system control Ic itself dhould be replaced, and it will need skill and good sodering concepts. If it is an SMD [Surface Mount Type], will need special equipments to desolder it out from the circuit board, and to replace. Ok.
Posted on Nov 20, 2010
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