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Broken Potentiometer I have a broken pot and need a part number to order

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Service manual


Open the box and try to spray a cleaning/lubricating solution inside the volume pot mechanism like Deoxit D5, you can also spray a little of it on the output connectors where you plugin your cable that runs to the amp. If that doesn't solve your problem you have to replace the volume potentiometer. The machine I have had similar issues and I was lucky to have a pot close in size and resistance value as the original which in my case was broken, so I just replaced it. Good luck!

Aug 07, 2013 | Alesis Sr 16 Stereo Drum Machine

1 Answer

How to replace a potentiometer


Disconnect from the mains.
Unscrew the four screws in the top
Slide out the chassis
Remove the knobs
Unscrew the pot nuts
Unclip/unscrew the PCB
Unsolder the pot
Solder in new one.
Re-assemble in reverse order
Strongly suggest you youse a better quality pot
Also the treble pot tends to go on these, replace at same time
All the best, Chris

Apr 14, 2013 | Marshall MG15DFX 15 Watt Compact 2...

1 Answer

Behringer DE2000 De-Esser broken band width pot


Best bet is probably Mouser, http://www.mouser.com Search for the individual catagory. While there is no direct cross, you should have an audio taper or logrithmic tape- similar graphs, but slightly different. It might do well to get one of each and use the one that matches the response of the others.

If however you have a loudness tap- usually 40 percent, that changes the ballgame. Mouser would still likely be the best bet. Over 800 items for pots in the general search at 50K

If your outer trace is intact, you can measure that with a meter to verify that is the range you need.

Feb 05, 2012 | Behringer Music

1 Answer

The treble knob for the clean channel broke off and now my clean channel doesn't work at all


Chaances are the potentiometer element was fatally damaged by the force when the knob was broken off.

You will need to have the unit serviced and getting the correct part is important to match the shaft, mounting, etc as well as the electrical characteristics.

The clean treble control is a 20K ohm, "B" taper pot (audio). ALL the signal for the clean channel goes through this so if pot is destroyed, clean channel will be dead.

Best thing is to call Marshall "parts" and get exact replacement. Note that sometimes the circuit board is cracked as a result of these accidents. This unit looks like the controls are VERY vulnerable to damage. I would make a cover to prevent damage from handling.

Another thing is to ALWAYS loop your guitar cable through the handle so tripping over it won't break the input jack which is a COMMON occurence.

Feb 07, 2011 | Marshall Amplification Marshall MG250DFX...

1 Answer

Behringer's Ultrabass BXL3000 Gain knob broken


You need to replace the potentiometer with the broken shaft. You can open the unit and try to get a part number or go to Behringer parts to get an exact replacement. The pot must be matched for value, taper, and mounting and shaft dimensions.

May 23, 2010 | Behringer Ultrabass Bxl3000

1 Answer

I have a Thomas Symphony Royale 782 with the rack portion of the rack and pinion volume control broken. Where might I find this component?


If it is the potentiometer that is broken, it is likely an AllenBradley "J" style pot.

Here is Digikey site for J pots. Choose resistance to match. You may need to check if it is an audio taper as well. The site should have them as well.

http://search.digikey.com/scripts/DkSearch/dksus.dll

Feb 02, 2010 | Music

2 Answers

The volume control is not working... even when the volme is "off" it is still on


Chances are the resistance element in the volume control has broken. This is COMMON if the control knob gets smashed some way.

A less common thing would be broken solder where the control is soldered to the circuit board. This would be obvious once the board is accessable.

Servicing involves removing the chassis and replacing the potentiometer.

Jan 17, 2010 | Line 6 Spider Iii 15 Modeling Guitar...

1 Answer

There is a repetative clicking sound whenever I use the treble on my guitar. what is causing this?


Did you mean the treble control potentiometer (knob)?

This was posted as an amplifier problem, but since you mentioned that the use of the treble (button?) on the guitar is causing the clicking, i would have the treble potentiometer checked first.

It could have a loosely soldered or broken wire on any of the tabs, oxydized slider contacts, bad ground (negative) connnection, possibly dirt or damage on the resistive track inside the pot.

A broken wire can easily be resoldered, but if there is internal damage or oxydation, the potentiometer should be either cleaned or replaced.

In short words - it may be a faulty treble pot.

There are ways to disassemble and clean a potentiometer, but the difficulty of this task may vary and depends mostly on the type and build of the pot.

The other alternative is to have it replaced.

regards

Triarcuate

Sep 26, 2009 | Fender Hot Rod Deluxe Guitar Combo...

1 Answer

My amp fell forward and the (knob side) hit the ground. Now there is no sound, but everything lights up.


You have probably broken some of the pots. You will need to take it in to be serviced or if you have experience take the amp apart and take the circuit board out. Examine the solder side where the control pots are. Hopefully you didn't break the pots themselves and the solder joints just need to be redone. Also look for broken traces near the pots. They look like little roads which they are for electrons.If they are broken you can bridge them with short pieces of tinned wire and if the circuit board is cracked it can be Crazy glued. Look for all the broken parts and don't miss any. If the pots are broken, Take the broken ones into an electronics supplier and ask for exact replacements. If its a tube amp look for tubes that are loose in their sockets and broken tubes. Absolutely do not work on the amp with it plugged in to the wall (no power running to it) If its anything worse than that, take it in to be repaired as you need schematics, test equipment and direct replacement parts to do a proper job. Hope this helps.

Aug 27, 2009 | Music

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