Question about Yamaha DSP-A1000 5-Channel Amplifier

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Dsp a1000 shutting off

This has been a great unit for years, but in the past 2 years I have had the same problem that hasn't been fixed. The unit shuts off for no aperent reason at all different times. I have had it serviced by a Yamaha service center, but the problem still exsists. They did a through chcek and cleaning of the unit first. I got it back and it didn't shut off for about a month. Next they ordered and replaced the selector switch. This seamed to last about the same amount of time. NOTE! When the unit would shut off it would not come right back on. Later I would turn it on and then If I shut it off it would not come back on, sooo, I would just leave it on, and it might stay on for days. We have a parott and he likes the sound of this baby as much as we do. It went off the other night and now I can't get it back on. I think the volume control board is the culprut, because the last time I got it to turn on I had the volume control all the way down. It came on and stayed on for a few hours, before it shut off. Any help or if the volume control board is for sale any where please let me know. The service center I talked to said they couldn't get the board. I don't think they know what to do to fix it, or don't want to. Thanks Missing our tunes!

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  • Markl2 May 15, 2008

    Surprise! I have the same problem on my Yamaha RX-V2095. The problem got so bad it shuts off immediately when I turn the unit on. I gave up!
    By reading your problem, it sounds to me this is a common problem on most of the Yamaha products.

  • add_augusto May 11, 2010

    where i could the schematic or cicuit diagram of yamaha amps model DSP-A1000



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  • 236 Answers

It's not actually a problem my friend. it could be a problem with the output circuitry and your protection mode is activated. there ar ecases that systems shuts off with no appraent reason and those are isolated cases. If that were so on your units, the problem lies in the systems board (CPU) a defect in the backup power supply. also grounding problem of capacitor leaks. if there is no trouble in the power amp section and works well suddenly trips, some modifications can be done. i dont know if that can be solved by your technical experts on how to modify the protection circuit. the principle on protection circuits of yamaha is just one and same. but newer models has got better but sensitive designs. 2095 is about 3years younger than a1000. 2095 is almost all digital when a1000 uses mechanical switches.

Posted on Aug 13, 2008


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Posted on Jan 02, 2017

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SOURCE: dsp-a1000 dead

output stage problem, systems trips due to protection. have the power amp transistors checked. the rotating of function switch is normal, its like a routine system check

Posted on Aug 04, 2008

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SOURCE: Yamaha dsp-A1000 5 ch Amp

if you wanted to use your receiver as your controller and source then try to find out the receivber has got a bridge (jumper) between the pre-amp stage and the power amp stage. if your receiver does not have that, then you can just connect your receiver tape record out to one of your DSP inputs. subwoofers, the DSP has got a sub woofer out connector. you can use that (RCA type) to your sub woofers. put in series because DSP has got only one output for sub. or, you can connect your subs directly to the mains speakers, parallel connections. maybe one sub to your left and the other to your right channel.

Posted on Aug 04, 2008

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