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I have roland cube20x. I makes a loud buzz when plugged a cable on the input jack but it goes down when i touch the jack. Thanks

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  • Roland Master
  • 3,107 Answers

You have a ground problem. I suspect your cord. Replace it, being sure you use an instrument cable, and see it that doesn't help.

Posted on May 03, 2017

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Posted on Jan 02, 2017

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SOURCE: cable broke off in the input jack

I'm pretty sure t6hat the output jack is a sealed unit(contacts inside soldered to the surface of the circuit board. You may be able to grasp the center shaft of the plug with a thin jawed hemostat or really skinny long nosed pliers and pull it out that way. Make sure the amp is off and unplugged from the wall. If that doesn't work you will either have to get it removed at a shop or disassemble the amp to remove the circuit board and unsolder the jack and replace it or get the broken plug out of the jack once it is unsoldered. I've never had a Line6 apart yet but thats probably the type of jack they used. Thats because it has to be electronically isolated from the chassis. Hope this helps.

Posted on May 15, 2009

M2Tech1
  • 313 Answers

SOURCE: My Roland TD6 drum module output jacks have a bad hum and cut out

sounds like the solder on the connections has either dried and cracked or come loosse if the wrigling of cables works its the connections if you unpluig and remove the back panel look where the cable connect check the condition of the wiring at source point of contact you may need to resolder or reconnect..

Posted on Jul 31, 2009

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SOURCE: Pedal inputs messed up? just buzzes, no sound!

Here is the schematic:http://www.godiksennet.com/images/sch/NS2.jpg Try testing or replacing Q1 first.

Posted on Nov 26, 2009

  • 454 Answers

SOURCE: input jack is not grounded

Can you remove the pickups and get your hands inside? Since wires are soldered to the jack and connected to the controls etc, you may have to remove all of the electronics.

Posted on Jan 19, 2011

  • 5603 Answers

SOURCE: I have a very loud

If this ties to a keyboard, make sure the keyboard and this are BOTH plugged into the same receptacle. You should send a higher level from the keyboard (turn volume up to around 70% or so) and use less volume at the input gain of this amp. Use more at master volume if the amp has one if needed. If the hiss is there with NO input cables plugged in and input gains at 50%, that is objectionable, the amp probably needs servicing. Unused channel gains should be clear down.

Posted on Apr 12, 2011

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Try plugging in the pedal with the Roland powered down or off. With the pedal plugged in, turn the Roland on again. The Roland should sense the polarity upon power up. If this doesn't work, I have had those pedals get defective right out of the box, so try this...Get a ¼ inch guitar or signal cable and plug that into the damper jack. The cable will represent an open circuit polarity since nothing is shorting out the leads. See if the EP77 is sustaining or if it is not. Alternately, try shorting the guitar cable by laying a piece of metal across the top and bottom of the jack. A pocket or kitchen knife or any bare wire will do. If this does not work, your assumption about the power supply may be correct.

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Try some standards -- unplug EVERYTHING, and use the headphone out jack first. After 2-3 minutes, and it's still crackle or buzz, then it may be something wrong with the internals. Could be simple, but may be more than what the unit's worth to fix. If it DOES NOT crackle/buzz, then you might have a bad connection/cable somewhere. Just plug them all back in, one-at-a-time, and wait in between plugging in. Best of luck!

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Hi, Quick Check. Very often the input socket which is soldered directly to the circuit board, will have a broken solder joint. This is common on a very large amount of equipment. Try waggling the plug about and seeing if the noise comes and goes.
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I have a very loud hiss/buzz sound coming from my Roland. It goes away if I lower the high volume knob. This just starred to happen recently. I tried changing connections from ch1-4 but no fix.


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Constant buzzing in my 15 W amplifier


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If you are saying that you are plugging a guitar cord into an input on an amp without the guitar on the other end and you are getting a hum or buzz with the volume turned up ; that is normal. If you are getting the same results with a guitar plugged in it means the ground wire to your output jack on your guitar is broken. Check your cord with a volt ohm meter for continuity on the tip on one end to the tip on the other end. Do this for the sleeve on one end to the other. If you were getting the buzz without a cable it would mean that your input jack in your amp has a broken ground connection. Hope this helps.

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