HELP -> Denon POA-3000 Service Manual or DC Offset Problem - diyAudio
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Old 29th March 2009, 04:30 PM   #1
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Join Date: Mar 2009
Arrow HELP -> Denon POA-3000 Service Manual or DC Offset Problem

I have just bought a Denon POA-3000 (not z series, former series which has Class A biasing) and I've picked up from the seller locally.

The amp has a Very Loud Pop on Left Channel when turning on or off. Also, the amp went into protected mode when played for about 20 minutes or so at low - moderate volume. It also went to protected mode several times during high transient peak.

I measured the DC offset and the Left Channel is about 40mV where the Right Channel is only about 6mV. I guess DC offset is probably acceptable but there are other problems as why it went into protected mode during playing moderate volume and the Loud Pop during turning the amp on and off.

If you have any idea to troubleshoot these problems, I would very much appreciated. I also can't find the service manual on the NET so if anyone here has it, can I get a copy of it? I will even be willing to pay for the service manual if you can point me to the right place.

Thanks in Advance!
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Old 30th March 2009, 04:23 PM   #2
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Shameless Bump.
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Old 1st April 2009, 11:59 AM   #3
bekim is offline bekim  Albania
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Join Date: Jul 2004
Location: Prishtina, Kosova

You can buy sm here:;forward=plist

Usually I check electrolyte condensers when is issue with DC biasing, regarding age and use of the amp, might be one of the problems. As well, main electrolytes can be dry.

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