Question about Yamaha DSP-A1 Receiver

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DSP-A1 Power Off

My DSP-A1 is powered off when I put the volume up (between 1/4 and 1/2) after many years, having the same configuration, including wires, speakers and units attached. Configuration: B&W Front, effect and center speakers (large). Niles as rear speakers. I have attached: DVD Audio unit, CDRW recorder, LD/DVD Player, MD Player, Phono turnover, VCR, TIVO, DIRECTV. All wires are MONSTER CABLES.

Posted by Jose Willington on

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3 Answers

Anonymous

The A1 has an internal self diagnostic program which you can go through to find the fault. You can access the diagnostic program by simultaneously pushing some buttons on the front panel. The Yamaha service manual for the A1 tells how to do it and what the diagnostic codes mean. You can get a copy of the service manual on the web from several suppliers for a small fee.

Posted on Jan 20, 2008

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Anonymous

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I am no expert but i had simmilar problems and it turned out that some capacitors needed replacing

Posted on Nov 18, 2007

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Anonymous

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All you have to do, check all your speaker terminal and tighten it

Posted on Sep 26, 2008

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You had a post that said you had fixed faulty power relays on DSP-a1 - how do you identify the relays that need cleaning?


That your amp does not go into the second stage of powering up indicates a fault which is causing it to sit in non-active mode. This could be due to blown output audio module or transistors or a fault in the safety circuit itself. It is not a fault the non-technician can repair and it would need to be sent to an authorized workshop.
I have seen situations where users unknowingly leave frayed ends of wire shorting across the speaker output terminals which can lead to this sort of fault. You could check this out also.

Oct 28, 2011 | Yamaha DSP-A1 Receiver

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My Yamaha DSP A1 after switching ON goes OF itself after 2-3 seconds! Please give me advice what to do Thanks, Alex


Register and download the manual for free at retrevo.com

http://www.retrevo.com/support/Yamaha-DSP-A1-Amps-manual/id/319ag811/t/2/

See Page 73 Troubleshooting.

Generally speaking, an amp protects itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.


Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.


You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.


If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.


If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Mar 06, 2011 | Yamaha DSP-A1 Receiver

1 Answer

No sound from center channel


If you have checked the speaker and wiring. Check the setup, the center channel could be off or it's not in a surround mode.
When playing a DVD through the receiver are the voices heard clearly in the front speakers? if so the center channel is turned off.

Oct 21, 2009 | Yamaha DSP-A1 Receiver

1 Answer

Pop from speakers when using dolby digital mode, works fine when not using any processing mode


Over 10 years old? Could be bad capacitors... if you have the expertise, you can try taking it apart and checking them with capacitance and ESR (equivalent series resistance) meters. Otherwise, you can try to see if any capacitors are exhibiting any "bowing" or leaking; if the top of the capacitor is bowed or puffed out - even slightly - or if there is a brown or white residue around the base of the capacitor, you can guarantee the capacitor is bad. Note that not all bad capacitors exhibit these physical attributes... but you can be sure a good capacitor won't.

If all of this sounds too complex, your only recourse will be to take it to a reputable electronics service shop.

May 26, 2009 | Yamaha DSP-A1 Receiver

1 Answer

Please Help about a Yamaha DSP-A1


The A1 has an internal self diagnostic program which you can go through to find the fault. You can access the diagnostic program by simultaneously pushing some buttons on the front panel. The Yamaha service manual for the A1 tells how to do it and what the diagnostic codes mean. You can get a copy of the service manual on the web from several suppliers for a small fee.

Jan 08, 2008 | Yamaha DSP-A1 Receiver

2 Answers

Av amplifier


The display problem is because the solderings on the back of the display are broken. To fix it you have to open the amp and redo the solderings (there are about 50 or 60 of them). There is a Youtube video that shows how to do it. I have fixed this on my DSP-A1.
I also have the problem with the motorized volume control. I have tried cleaning it, and it works for a few days, then it's stuck again. I guess I will have to replace it to have it fixed permanently. The part number is VZ621400, a new one costs about 40$.

Jan 07, 2008 | Yamaha DSP-A1 Receiver

1 Answer

Volume level dropping unexpectadly


The A1 has an internal self diagnostic program which you can go through to find the fault. You can access the diagnostic program by simultaneously pushing some buttons on the front panel. The Yamaha service manual for the A1 tells how to do it and what the diagnostic codes mean. You can get a copy of the service manual on the web from several suppliers for a small fee.

Nov 18, 2007 | Yamaha DSP-A1 Receiver

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Also problem with Denon AVR-2802


If DIGITAL sign on the display blink, it mean the DSP board is defective. probably the DSP itself

Jul 22, 2007 | Denon AVR-2802

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