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Sony KV27TS11 troubleshoot?

Discussion in 'Electronic Repair' started by [email protected], Sep 6, 2007.

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  1. Guest

    This is the set that uses the STR3035 IC for regulation, and I have
    basically determined that the chip's output (pin 4) is basically
    shorted to ground, i.e. it has only 0.79V to ground. I know the short
    isn't coming from the STR3035 because I actually snipped the pin 4
    lead going to the pcb, and there is still a short (about 1 ohm to
    ground) from the pcb.

    It would be a nightmare to trace all the connections, and I was
    wondering if anyone out there can send me a schematic to speed up my
    troubleshooting. So basically, if I plug into mains, the relay fires
    up, and then nothing happens except after about 10 seconds, you smell
    the very hot 220 ohm, 20W resistors heating up rapidly. My suspicion
    is that some transistor is toast, but I don't have a clue which one.
    There is no sign of burnt marks anywhere. According to the previous
    owner, the TV just decided to shut itself down one day.....

    Schematic or any ideas, anyone?

    Thanks,
    Richard
     
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