Question about Yamaha DSP-A1000 5-Channel Amplifier

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When acellerating the bike and then let off 0n the gas to change gears the engine continues to rev and very slowly decreases in rpm[which could take as long as 1 to 2 minutes].From what I can gather it needs a vacuum line to the air cut valve, but where in HELL is that valve.Thanks Bert

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Hi Bert

What model scooter you playing with. I am sure I can find some info for you, just need somewhere to start. :)

robotek

Posted on Jul 18, 2008

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Posted on Jan 02, 2017

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Volume shuts off till i decrease level about 4or 5 on the dial


You''re overdriving speakers that have too little impedance. (4ohms
when the amp needs 8ohms f'rinstance)

The amp protects itself by killing volume....

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Peavey Ecort is working fine but has a loud buzzing that slowly gets


This is often caused by the failure of the large capacitor(s) in the power supply. The noise being the 50/60hz mains hum getting in. They will be the biggest Capacitors in the system with a value around 4700UF or greater, so you can't fail to see them.

Jun 14, 2013 | Peavey Audio Players & Recorders

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I have 1set power amp " ashly ftx-2001" . my problem is one of component spoill ( ic ), i want to change the componet, but i can't see the code, the ic position near from white fuse, the ic have...


If the IC doesn't work take it out then you will be able to read it just fine!
All you need is a soldering iron and a desolder tool. I like the solder suckers best for these jobs.

May 01, 2011 | Ashly FTX-2001 Amplifier

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Thanks for the answer - If we have 3 controls as Bass, Mid and Treble. If we keep those in 12 O Clock position, will the output level be equal. In using the Bass and Treble control only (if we have...


If all are in 12 o'clock position they are "flat" (nothing has been added or subtracted foam input signal) If you only have bass & treble, yes adjusting will affect "mids" but Mids change can go both ways dependent on increase or decrease of Bass and /or treble. By increasing bass you will pull some mids up also. By increasing treble you'll subtract some mids.

Mar 17, 2011 | Audio Players & Recorders

1 Answer

When you switch the amplifier on there is a strong background noise that is not linear with the volume, as it decrease a bit after the first quarter of the volume knob run. I have tried it in diferent...


If the noise does not go away when you turn the volume control down the problem is in the output stage. If the noise is in one channel, then you should only look at that channel. Use the other good channel as a guide to what is working. If in both channels then it can only be something common to both channels. The bad news is that anything can cause noise.

Nov 07, 2010 | Cambridge Audio Azur 540A Amplifier

1 Answer

Fender Vibro King Pilot light out??


Hi superleaddud

MOst probable, is that an output tube went west(decrease in vol), and in turn popped the fuse(pilotlight went out). It is always a decent first bet that this is what has happened. You get generally 6 months out of a set out output tubes if you use the amp often, and at gig levels every week. I would first check and replace the fuse, and then the output tubes. GT 6L6GE are factory for that amp, and always a fair bet to use the same to replace them. If you cant extend to the budget for the GT's, then Russian made (Sovtek) Electro Harmonix make a decent quality tube that sound good in guitar amps. . Always replace them as a pair, and buy them gain matched. Get the Grove Tubes from a music store, and the Electro Harmonix from an amp repair specialist. Happy to answer any question you may have about the problem. Cheers. A FixYa rating is a great reward for my assistance to you.

regards
robotek

Nov 24, 2008 | Audio Players & Recorders

1 Answer

Drop out of left channel, Adcom GFA5802


It sounds as if there is a broken solder joint somewhere that slowly opens up with heat. The other possibility is that an input or driver transistor is dying. Since the whole channel is dying, I would guess the broken joint and/or dying transistor are near the very input of the channel.
A tech can very easily find the spot by playing the amp until it starts to die, then spraying small bursts of freeze spray, one component or area at a time, until the amp suddenly comes back to life.
 

Aug 13, 2008 | Adcom GFA-5802 2-Channel Amplifier

1 Answer

Crown D-150 Amp


Sounds like something was spilled into the amp and it got into the controls, switch and switch knob. As for the knob, lean the amp forward about 45 degrees and dribble hot water into the space behind the knob slowly. Try to keep the water from going inside the amp. Eventually, the knob should come off with some pulling & twisting. Once you get it off, replace both pots and the switch. If water gets into the amp just dry it up with paper towels, etc. and let it continue to dry while getting the new parts. HTH, Emory

Sep 27, 2007 | Audio Players & Recorders

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