Right Channel Broken

Discussion in 'AV Receivers & Amplifiers' started by sampie, Mar 27, 2006.

  1. sampie

    sampie
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    Hello I would really appreciate some advice,

    I have an old Cambridge A5 for which the right channel doesn't work (after turning it on without wiring the right speaker). All I get through the right channel is a hum and the occasional crackle/pop.

    Is this at all/cheaply repairable?

    Thank you!

    Sam
     
  2. clockworks

    clockworks
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    Some early amplifiers didn't have any kind of protection circuits. If they were switched on without a load (speaker), the output stage would self-destruct. My very first amplifier - an Amstrad 8000, over 30 years ago - did that, and it was a dustbin job.

    It's most likely a blown output transistor, possibly both if it uses two devices per channel. Hopefully, they should still be available from somewhere like RS Components. A simple job to change them, and cheap if you do it yourself.

    The transistors should have numbers printed on the top of the cans.
     
  3. sampie

    sampie
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    Thanks alot for you advice,

    I took the lid off and I can see that 2 resistors are melted/charred, nothing more though. I might pop into a local electronics shop and ask, cheers.

    Sam
     

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