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Dtx multi 12

Intermittent static noise. gets worse as volume raised

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Mixer Switch on and after a short period theres a noise that sound like a machinegun and a Hiss sound through the speakers


I assume that the power-amp is good.
This noise, of course due to defective parts inside.
But, which section is it? Chances are:
  • Amplifier circuit in the Main-Outputs. If the MAIN MIX in the minimum position and still noisy, then the damage in that section.
  • At one or several channels. Let's test.
    Set to minimum volume for all channels and MAIN MIX. EQ=flat. FX=minimum. TRIM at half (let's try at 12 o'clock).
    Raise the MAIN MIX, let's say at 15.
    Gently, raise channel 1 volume to maximum, listen, if there is no noise, channel 1 is safe. Lower the volume to the minimum again. Move to another channel in the same way.
    If found noise, that is where the problem is.
Actually, many more detailed steps for testing, but the description is too long. This above is a simple way.
Circuit power supply should also be checked, whether all normal voltage.

mixer-switch-after-short-period-theres-imlh0v44wkwtg1kaqtxpxnrr-2-0.jpg

mixer-switch-after-short-period-theres-imlh0v44wkwtg1kaqtxpxnrr-2-1.jpg

It is part of the image of the amplifier section circuit.
Parts which may be broken is the IC 64,65,77.

Sep 13, 2015 | Behringer XENYX 2442FX Mixer

1 Answer

Static at louder volumes


All you need to confirm is to remove the connection to the guitar, remove the jack and cord to the guitar and now check if the noise is prevalent at higher volume, when the volume control is turned up. If so the fault is with the cord , the jack or the gutiar pick up insulation or internal connection or shielding.
Cross check with a seperate cord or another amplifier to confirm the case.
If the noise is from within the amplifier then it is possible there is fault in the preamplifier, fault with shielding of the inputs or the preamp, broken groung connection.
Compliments of the Season.

Dec 24, 2011 | Roland Ac60 Acoustic Chorus Guitar...

1 Answer

My peavy kb300 produces a crackling noise & cuts off intermitently when I raise the volume on all 3 chanels.


Low Voltage power supply regulation issue, particularly with +15V and -15V.

Dec 23, 2011 | Peavey Music

1 Answer

I have a RH50 T amplifier, it had a bit of a bumpy car ride to band practise the other day and now when i play through it, it will make a permanent buzzing noise on the clean channel that gets 70% worse on...


You may have damaged the variable resistors (the volume controls), you can purchase replacements from a local Electronics store (if UK based try Tandy). Otherwise have you checked the speaker itself for damage? You may have split the speaker which will need to be replaced.

May 04, 2011 | Randall RH50T Tube Series 50-Watt Guitar...

1 Answer

My Dm5 drumkit module keeps intermittently ''freezing''. After powering down and switching back on it's ok again for a while, then after a varying amount of time does the same thing again, i am using it...


Intermittents are hard to find the cause of... but let's give it a shot...

Things to try or verify:

1, Verify power connector is fully seated and supply is correct one and is producing the desired voltage..

2. Verify that the amp this connects to is powered by the same wall receptacle. (this is a ground loop noise issue) Also don't let mic's or other electrical equipment touch the drum pad mounting system.

3. Verify you are not inadvertently generating static discharges. If you find yourself drawing sparks when you touch things this is an indication of static. if this is a problem, raise humidity to 40%.

4. If unit is subject to heat, try cooling with a fan to see if it helps the situation.

5. Verify the unit is NOT being vibrated.

6. IF THE UNIT is quite old, verify an internal backup battery is not depleted... they usually are about 3 volts when OK.

Jun 26, 2010 | Alesis Dm5 Module with Tk5 Acoustic...

1 Answer

Weak LCD Display on a Yamaha DTX Electronic Drum Kit


NOT a battery issue.

Note that many of these devices have a parameter one can set for "contrast" or "viewing angle". You might want to check your owners manual for this possibility.

I downloaded the DTX manual and there IS a contrast control on the back of the unit near the top left facing the back...
IT MAY require a screwdriver to adjust it.

Apr 03, 2010 | Yamaha Dtxpress Iv Special Electronic Drum...

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

1 Answer

Roland keyboard. Extremely static-y speakers. Cuts out.


It sounds like your volume slider is dirty. Try carefully and judiciously spraying a good quality contact cleaner into the slider and working it. do not use a lot. It only takes a little. Also do not use WD40.

Mar 01, 2009 | Roland Juno-D

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