Entertainment Center: TVs, Stereos, VCRs and DVDs - str-db790 protection mode problems

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rrratty
03-16-08, 07:00 PM
i was playing some music pretty loud today when all of a sudden there was a few crackles and a flash and the reciever went into protect mode. i now realise that it has perhaps overheated and blown something. i took it apart and there is a bank of transistors attached to a large heatsink i can see that one of these is definatly blown. would i just need to change this transistor or is it likely some other things have blown also ie caps and resistors what is the possibility of just changing the transistor and all being fine or will i cause more damage if there are othere blown components.

thanks for any help in advance

Rick Johnston
03-17-08, 04:00 AM
When the output transistor failed it probably caused a direct short. The processor sensed the overload and shut itself off. There may be more than one bad transistor, though. It's a good idea to pull them all anyway to check them.

If you replace the bad component (with an identical part) and it remains in protection, you're next step is probably going to be a trip to an authorized repair center.