We were watching TV the other night and *bang* (as in made an actual noise), no more picture. Sound was still working but the ominous smell of vaporised semiconductor hung in the air!
Popped the back off and sure enough the top Y Buffer ICs had a big hole in it. I turned power back on and could see one of the buffers on the bottom half starting to glow too. So I removed both buffer boards and tested the Y-sus voltages Vy and Vsc, both of which were in spec at 150 and -190V (Vsc is confusing as measuring with the polarity indicated on the PCB it actually gives a positive voltage).
My question to you knowledgeable fellas is this: do I just source new Y buffer boards or is it likely there's something else wrong with the Y Sus board that isn't obvious and damaging the buffers? Is one fried buffer likely to cause the rest to pop? The reason I ask is because that Y Sus board doesn't seem particularly common so could be a headache to replace.
The Y Sus board is a EBR69839001
The buffer boards are EBR69839101 and EBR69839201
Thanks!
Popped the back off and sure enough the top Y Buffer ICs had a big hole in it. I turned power back on and could see one of the buffers on the bottom half starting to glow too. So I removed both buffer boards and tested the Y-sus voltages Vy and Vsc, both of which were in spec at 150 and -190V (Vsc is confusing as measuring with the polarity indicated on the PCB it actually gives a positive voltage).
My question to you knowledgeable fellas is this: do I just source new Y buffer boards or is it likely there's something else wrong with the Y Sus board that isn't obvious and damaging the buffers? Is one fried buffer likely to cause the rest to pop? The reason I ask is because that Y Sus board doesn't seem particularly common so could be a headache to replace.
The Y Sus board is a EBR69839001
The buffer boards are EBR69839101 and EBR69839201
Thanks!
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