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Rotel 820ax firing on one channel only. Tried switching speakers round and isolated problem to left channel of amp. Recently repaired (2nd time) so deciding whether to repair again or bite teh bullet and buy a new amp.

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Hi.

The part that blows more easily is the final transistor, in tour case the one on the left channel.

The unit must be taken apart and tested at component level

Identifying the transistor will be an easy task, even without schematics. You van find the transistor following left channel output circuit. If the transistor is bad, replace it, and test the resistors near to it. If the transistor is OK, then there is often a problem in the preamp section.

Check wiring and output connectors by reading Ohms and verifying they have continuity before working on amp circuits.

If you are not a technician, better having the unit fixed by a professional. In that case contact Rotel: Rotel Ltd - Contact Us

Posted on Feb 06, 2010

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