Question about Yamaha DSP-A1000 5-Channel Amplifier

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Yamaha DSP A-1000 input selector switch not working properly

Hello, my aging A-1000 still works good except when playing DVD movies. It appears to be a lose contact at the input selector switch. If I giggle with the input selector switch the sound comes back for a while. But it repeats the problem by "no sound from right speaker to static sound" and it is annoying especially watching movies. I recently made the DVD input in the back of the unit to LD (because A-1000 was made pre-DVD era, I have been using TV/DBS as a DVD source.) It now works better than before, but still the problem comes back. The strange thing is this rarely happens when playing music CD thourgh the same DVD player (effect off). Would you agree that it is the input selector switch that is the problem? If so, where can I get a replacement switch? Thanks.

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As that unit is well over 5+ years old, I seriously doubt the part is available any longer. I doubt that you will even find a used part, and even if you do, it will probably be as bad as your switch. As I have worked on audio for over40 years, I would use LPS 2. It is a lubricant. Do not try this with WD40 or similar. Just spray the LPS on the wafers, or through any open holes in the switch. You just need a little. If you just squeeze the button, you will see just a little bit of foam. That is all you need. No more; no less. Rotate the switch from from left to right and back again multiple times. Try that. BTW, no manufacture uses these mechanical switches any more.The controls are now called Rotary Encoders, which basically are inputs to a display microprocessor IC(a computer within the new product) which in turn controls the inputs of a switching IC. It's the same as your old switch, just electronic, and much more complicated. If you need more information, or would like to inquire about repairing your unit, please visit my website at audioserviceclinic.com. You may contact me there. Thank you.

Posted on Dec 13, 2014

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Volume LED? that sounds like the mute switch is on. it has a 20dB attenuator that can be deactivated using the remote

Posted on Jul 12, 2009

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Hi all

just got my DSP A1000 back for the same fault. Cost me AU$122, considering the rubbish out there, cheap. have one question but.........why is my volume LED flashing?

Posted on Jul 19, 2008

  • Audio Service Clinic Dec 13, 2014

    On some receivers, this may be muting. On others, it may be a sign of DC Offset(a damaged amplifier). You can try a factory reset, a procedure found in your owner's manual, but I doubt that will fix this condition.

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Flying yeti.... yup... it's definitely your input switch. im from yamaha service before at saudi arabia. that is a normal trouble specially in high humidity places. you can only get a replacement at yamaha service though. their newer model are better they dont use contact switches nomore.

Posted on Mar 18, 2008

  • Redentor Rivera Mar 18, 2008

    FlyingYeti...Yamaha has produced their replacement switches with gold plated contacts. That was done after about a year of production of the model. The original switch has got the lead coted contacts only and does not work long enough. It was a major fault on this series of DSP using mecanical switches and yamaha engineering has revised the contacts for longer perf. Order your input switch and have it replaced, it will work well again and will last longer. DSP A1000 is one of the best

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Yes Yamaha haven't made good contact switch yet, I don't know when, I've seen lot's of yamaha with bad switch and volume control, It's easy to get parts I find with yamaha, not like the other brand that sony's sales, contact yamaha help desk and they will dirrect you to the parts dept. , you will need a credit card and you won't be able to get the part.
To find there # go to www.411.com or in googles type yamaha.com

I hope this help's

What About Bob

Posted on Feb 12, 2008

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Hi. my YAMAHA DSP-A1000, works well only the input selector does not to select. its all static noise and does not seem to lock onto an mode. i have to use the tape 2 monitor to hear music.


The INPUT SELECTOR is defective. Order part number VT148000; it costs $51.04. As of 14 Jan 2011, the part is on backorder until the later part of Feb 2011.

Register online to order the part yourself, or you can place your order by phone at the Yamaha Parts Department at (714) 522-9011 or (888) 892-6242, Monday - Friday, 7:30 am - 5:00 pm PDT.

https://www.yamaha24x7.com/yamahaoms/QuickOrder.aspx

I hope this post also clarifies the problem from the posts above.

IMPORTANT: After installing the new Input Selector switch, place the knob at 1230 position (between LD and DAT/Tape 1) BEFORE turning the unit ON. The Yamaha Tech said this procedure ensures the input source is properly programmed and aligned.

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The easiest way is to buy the new part online and replace it - cost about $50US.

However, if you're up to it, this problem is fixable without the need to buy any parts. The selector switch has four sets of spring contacts which need to be bent slightly to increase the pressure on the pads against which they press, but it's a tedious job and not for the faint-hearted.

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Open the case (6 screws) and also free up the front panel (9 screws).

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Take some digital pictures while the wafers are still on the shaft with the orientation of the KNOB included - if you mess this up (I did) the job becomes horrible! Also, mark each wafer with a number 1-4 because there are three different kinds Once you are comfortable that you can replace the wafers in the proper rotary configration with respect to the shaft, remove them individually and pop out the gray plastic cores and bend the spring contacts upwards so that they will go back pressing more firmly against the pads. Now reassemble, and good luck!

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ty

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