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What causes static in this unit even without running anything through it?

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1 Answer

Psr 60 no sound


Are you using the original PA-4 power adapter that goes with this unit? Using the wrong one would cause it to not work properly. Weak batteries would do the same. A generic power adapter would also, if working would cause static noises in the sound. The PA-4 is an odd unit, it is 10volt DC at 1 amp output. IF the one you are using is less than 1 amp, meaning if it says 400mA or something with an "m" in front of the A, UNLESS it is at least 1000, then it isn't strong enough to work correctly, EVEN if it powers up. If you have the wrong one, you can find it here:

https://www.google.com/search?q=Yamaha+PA-4+power+adapter&hl=en&source=univ&tbm=shop&tbo=u&sa=X&ei=kPFbUeb1LoPk9ATzwIDwBw&ved=0CD8Qsxg&biw=1440&bih=756


I hope this helps you.

Mar 31, 2013 | Music

1 Answer

My cdmp-6000 always hangs and resets.... what causes it? and what maybe the possible solution?


I can give you some questions to verify possible problems:

1. Is the mixer, and ALL connected equipment powered from the SAME receptacle? If not, ground bounce can be causing damaging transients. This OFTEN requires running power back from where amps are to the mixer using an extension cord.

2. Are ALL audio interconnectsusing balanced lines where possible?

3. Is humidity 40% or greater? If not, possible static discharges from rugs, clothes, etc. may be causing transients that reset the unit.

4. Are stage lighting equipment run from a separate source to avoid transients from dimmers and switching?

5. Is the power all have three wire cords and the building have grounded receptacles?

If your system satisfies all these the next step I would suggest is a high quality power conditioner.

May 07, 2011 | Gemini Sound Products Gemini Cdmp-6000...

1 Answer

I have static in my 8/10 mesa cabinet. Its only in the second bank of speakers. The speakers seem to work and sound as good as the others in the cabinet but there is a weird light static sound that comes...


Sometimes there is a resonance with materials that are a part of the case or inside the cabinet that cause this. If the level is very low, don''t worry about it. I have even seen the logo on a speaker grill causing the noise... also debris inside or behind the grille...

Mar 25, 2011 | Mesa Boogie Mesa/Boogie 2x10 Vintage...

1 Answer

I touched my speaker and felt a static electric shock, the unit powered down, although it powers up, I hear the cooling fan but no sound or front power LED now. what happened and how do I fix it?


Did you have this speaker AND the device that drives it connected to the same power source? If run by a mixer you MUST run a power extension from the same place your powered speakers are powered to the mixer. Ground bounce due to wiring in a building can destroy input circuits due to ground faults and static discharges. ALWAYS use balanced lines either XLR or TRS cables to interconnect the audio.

Also verify your power receptacle is properly wired. Carry one of those plugs with the indicators showing receptacle is wired correctly. Don't plug anything in until you verify it. Some venues are noted as having bad electical service.

Let your speaker sit for a minute and repower it... sometimes they have a lockout that takes time to reset.

Mar 03, 2011 | Mackie HD1531 3-Way 15" HD Powered PA...

1 Answer

I bought a Vypyr 120 combo amp with the Sanpera II foot switch a few months ago. There have been at least a half a dozen episodes where I'll be playing and the amp will just freeze-up, no sound unable to...


You should NOT be blowing fuses... If you are you MAY be overdriving the amplifier. It should be hard to blow fuses in a tube amp unless the power tubes have become gassy (purple glow between the elements) or you are driving a square wave (full distortion) that may be saturating the output transformer.

This unit has a digital signal processor for the modeling and when the amp seems to freeze, it is probably this part of the system that freezes and ceases to pass the audio.

Make sure you run the amp on CLEAN power. Using a long small gauge extension cord may cause the freezes.

An even more insidious problem is static electric discharges... some so small you may not even feel it. If you are on rug, spray the area with Staticide anti-static spray. A small static discharge can send the DSP into never-never land and the amp will appear to quit. Raise the humidity to at least 40% will help the static problem.

Make sure you are using grounded outlets.

Feb 26, 2011 | Peavey VYPYRT120 Vypyr Tube 120Watt Combo...

1 Answer

When i power up my line 6 spider 3 ( i think it has two 75 watt speakers) all the lights work but no sound at all no static or speaker sound even at full volume. cable checks out, but even with a bad cable...


A pilot light means almost nothing other than the power cord is plugged in and hot and the switch is on. In this case, other lights run from various DC supplies so the inout fuse is presumed to be good... NEVER replace a fuse without knowing what caused it to blow or you will usually do more damage within a unit. There are several power supplies and you will typiclly find +/-15 volts on the op amps and 3.3 volts on the processor logic. Unless something simple like the speaker cable falling off this will NOT be a DIY repair. I would look to see if this speaker cable might have fallen off and ALSO check if you get any sound using headphones.

Nov 06, 2010 | Line 6 Spider Iii 120 Stereo Guitar Combo...

1 Answer

Feedback


Supposedly one pushes down the FBQ button and the LED's in the EQ handles light for those with feedback and you adjust those till the lights go out.

More importantly I want to caution you to NEVER run this unit without a speaker load. There is an arc over condition in the rear-most power amp that kills the unit. This can happen even with everything connected. It causes major damage. At the slightest indication of flakey behavior, power down and take in for service.

Apr 02, 2010 | Behringer Pmp3000 16 Channel Audio Mixer

1 Answer

NO LIGHT OR SOUND


A BARE USB cable should NOT have caused any problem. If it was an "Active" type cable that does a conversion something might have happened. Another possibility is you had a static charge on you and the static did damage. Another possibility is if the connector really wasn't the SAME type and pins were shorted. Turn off the power and with a bright light compare the connectors to see if this last possibility might be the case. Also look for signs of arcing or bent pins. If the connector was forced, then it is possible the circuit board was cracked.. In any event servicing is required.

Search the web for a "Factory Reset" sequence for the unit. Usually you have to hold a button or a combination as you turn power on.

Jan 16, 2010 | Pioneer DJm 400 Professional DJ Mixer

1 Answer

CASIO PX575R 1 year old off warranty. Randomly, keyboard will lock up. The keys will stop triggering any sound, but the rhythm machine keeps on playing. And all the controls are locked, not a single button...


This may be a hard one to analyze, however my educated guess is that a static discharge is putting the internal processor in a program loop it shouldn't be in.

It is my experience that you MAY not even feel a discharge even.

Suggest you make sure to not wear static producing clothing as a test. Sliding across a piano bench might even create the discharge.

The unit SHOULD not be sensitive to this, but the designers don't always do things right.

ALSO make sure the unit is plugged into a grounded receptacle.

Use of external things like amps and headphones can WORSEN the problem of static. External amps MUST be fed from the same receptacle.

Aug 07, 2009 | Casio Music

1 Answer

What causes the static background noise in my keyboard?


Hi,

It sounds as though you have a static electricity problem in your volume pot. Although there are sprays on the market that you can use for all of the electrical switches on your keyboard which removes and suppresses static electricity, one way to make sure this is the problem is to slide your volume slider to maximum, then minimum, up and down about 10 to 20 times, if the scratchy sound begins to diminish, you knwo the problem lies there. As a matter of fact, if you do it long enough, the sound may go away altogether, although without a good spray of electronics cleaner or electrical contact cleaner (which you can find at stores like home depot or online, even eBay), the sound will return.

If this is not the case, and the scratchy static sound does not go away or depreciate, it could be your cords or even static on the pc board inside the unit. If you are confident that you can crack the case on your board without causign damage, then get a screwdriver and open the case (all screws are located on teh bottom of the unit) and give it a good spraying with electrical contact cleaner on all of the contacts and even a once over on all of the circuit boards. Do not wet the circuit boards with too much spray, rather, give them a light misting.

For areas where you plug in, like your 1/4 inputs, your midi ins and outs, and headphone jack, spray the contact cleaner inside the holes. You don't have to worry about spraying too much in these areas. Just do not oversaturate.

Hope this helps, and thanks for using FixYa

Jul 18, 2009 | Music

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