Question about Denon DRA-365R Receiver
I have fixedx a problem output (changed pwr xtr) on one channel of a Denon DRA 365a..when i turn the unit on ity would play for a few seconds and then the relay would turn of but still have power on the unit..I have trace a 1kc signal up to the output xtr, but one channel seem to be lower that the other, and all the voltages on both channel are equal.
SOURCE: Denon AVR-3802 Problem
Check that your speaker cables are not touching each other at the amp end and also at the speakers as this will cause the amp to shut down.
hope this helps.
Posted on Jul 12, 2008
Without looking at the schematics for this particular model, I'd surmise that the click is indeed a speaker protection relay. Generally this is fed by a number of different sense circuits that watch for power amp issues and/or excess speaker current and/or power supply output stability. Although the relays do indeed fail at times, generally it is not the relay that is at fault. If you have a scope and a schematic, you can check the various circuits that feed the relay for the exact cause. If not, you can do some experiments that might help deduce the problem: e.g. do headphones work when speakers do not, does the relay click on when no speakers are connected (or selected), etc. In my experience, it is most often the output transistor(s) in the power amp. But not always ;-)
Posted on Oct 15, 2008
Check in the amp section for a short on the output transistors. It may need a resistor or two also. I doubt that it would be in the power supply.
Posted on Jan 31, 2009
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