This TV had no power. I had repaired a similar TV with a shorted diode here
https://www.badcaps.net/forum/showthread.php?t=71919
Found fuse F602 blown, main switching transistor Q601 shorted and one of the SB3A0 secondary diodes shorted (can't recall which one). With the components replaced, fuse doesn't blow, main filter cap measures around 160V stable but there is no output at AMP+13V and P-ON+21V lines. There is no short on those lines - pulled up the protection zeners (still disconnected in pic), and checked C650. Odd that both have 0V since they are relatively independent fed from different legs of the transformer.
Service manual from this thread https://www.badcaps.net/forum/showthread.php?t=56211
May have clues from repair kit in this listing. Shows some SOT-23 transistors and power resistor. https://ebay.us/FnpoZo
https://www.badcaps.net/forum/showthread.php?t=71919
Found fuse F602 blown, main switching transistor Q601 shorted and one of the SB3A0 secondary diodes shorted (can't recall which one). With the components replaced, fuse doesn't blow, main filter cap measures around 160V stable but there is no output at AMP+13V and P-ON+21V lines. There is no short on those lines - pulled up the protection zeners (still disconnected in pic), and checked C650. Odd that both have 0V since they are relatively independent fed from different legs of the transformer.
Service manual from this thread https://www.badcaps.net/forum/showthread.php?t=56211
May have clues from repair kit in this listing. Shows some SOT-23 transistors and power resistor. https://ebay.us/FnpoZo
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