20 Most Recent Yamaha DSP-A3090 7-Channel Amplifier Questions & Answers

Hi james, Hard to pin down a diagnosis of the problem without having a looksee under the hood. Good amp, worth repair, if you are into it. Could be a number of things

1. Loss of a rail in the power supply
2. System Processor down
3. Main power transformer faulty

Are you able to check over the amps power supply? Need to start there to sort out the problem. Good Luck. Get back to me here if you want to get into it further

regards
Graeme

Looks like its between the transformer and the bridge rectifier, will be a simple repair for a qualified electronics engineer. Unlikely the board needs replacing but as will many of these posts this isnt something that can be repaired over the internet it really needs an engineer to look at it in person. If you are in the UK you could send it to us amd we diagnose and quote free of charge but you just have to pay for shipping. Hope that helps. J.

What is the question?

All it will be is a bad solder joint inside the unit. Very easy to fix with a soldering iron. If you are no good with a soldering iron this should be a quick and cheap repair.

'Outside' is not a choice on the unit.

If you want to drive a separate amplifier with speakers somewhere you could replace the Main Channel Pre-Out jumpers with an RCA-Y-adapter and slave the second amp and speakers to this unit's volume controls; or you could attach a second amplifier to either TAPE REC OUT pair and the external amp and speakers would have independent control of volume locally.

That is a bit vague. Do you mean the system does absolutely nothing? THis unit has a number of fuses as well as a protection circuit built in to protect the more procey components (like the amp modules). Try the fuses first. But, if they blow quickly you have a component failure somewhere and that means some serious teardown and analysis. Look at the tops of the capacitors (the "cans"). If any of them are bulged, they have failed and require replacement. Beyond that you will need a maintenance manual and hopefully some electronics background. OTherwise, have it serviced by a pro. Most shops will give you an analysis for a fixed $40 or $50. If it needs repair, the analysis fee generally applies to the total bill.

I like Yamaha stuff. Generally built like a truck!!

Register and download the manual for free at retrevo.com

http://www.retrevo.com/support/Yamaha-DSP-A3090-Amps-manual/id/319ag815/t/2/

http://usa.yamaha.com/products/audio-visual/hifi-components/amps/dsp-a3090_black__u/?mode=model

No.

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