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Hi, I have an old roland D 20 that just makes a really loud constant white noise type sound when turned on. Any ideas to the problem?

Have tried general resets, different power outlets and opening up and cleaning out

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  • Roland Master
  • 21,397 Answers

D-A final converter possibly faulty.

Posted on Nov 23, 2014

6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

  • 5603 Answers

SOURCE: It's a Roland HP-7e digital piano about three years old.

You may need to clean the contacts which are usually conductive rubber. I explained stuff for another Roland problem with two keys that were intermittent. I have an EP-7 that I had to do the cleaning of the key contacts. Use 91 or 99 % Isoprophyl alcohol to clean BOTH the conductive "pill" (Black under silicone rubber domes) AND the traces on the board where they press. Clean gently as the traces have a hard black coating.

Posted on Jul 29, 2009

  • 5603 Answers

SOURCE: Deville 212 overdrive channel making Loud humming noise

It sounds like a filter capacitor(s) has failed. The electrolytic caps dry out and cease to perform allowing unfiltered power to reach the preamp sections and get amplified.

Being this is tube with high voltages, an experienced person should work on it due to shock danger.

I assume you checked the tubes for shorts as well as emission since a heater to cathode short could cause this as well.

Posted on Sep 30, 2009

Testimonial: "Thanks man. and thanks for the fast response"

  • 5603 Answers

SOURCE: I have a Roland HP 101 digital piano however certain dont sound

White spirit is NOT what you should use. Mineral spirit leaves a residue film.

Use 99% isoprophyl alcohol.

ALSO inspect the contactboard for cracks by candeling with bright light behind it.

Posted on Nov 01, 2009

Testimonial: "bur isnt it strange that certain keys have stopped working? ie most the A keys"

  • 5603 Answers

SOURCE: Marshall MG50 DFX makes a squealing noise on power up

Yep, chalk that one up to poor design...The amplifiers are going out of balance during power up and down. Two seconds is pretty long... Try turning down the gain during power on and see if that affects it.

The pop on turning off is normal... None of these have speaker disconnecting hardware that is necessary for very high power amps. The biggies have hardware that checks amplifier is balanced before connecting the speakers and a relay also cuts the speakers immediatley on power down. As power goes up and down the circuitry comes to equilibrium and until it does, strange things happen.

I would investigate the CONDITION of the filter caps for the main power because if they age to a higher internal resistance that COULD cause the high freq oscillation on power up... Two seconds is MUCH too long.

There should also be some non-electrolytic caps NEAR the power output transistors to handle high frequency supply power bypassing.

Check the power bypasses that service the preamp stages. Look for pregnant electrolytic caps that have failed.

Ultimately, you MAY need an oscilloscope to isolate the high freq problem.

Posted on Jan 03, 2010

Testimonial: "Thanks - great advise! The gain position makes no difference. I'll try to chase the problem with my Tek Oscilloscope ;-)"

djlaplaya
  • 74 Answers

SOURCE: Roland U-20 no sound

you need to check your midi connection into the unit, check the cable and the channel that you are sending.

Posted on May 06, 2010

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Can you please tell me the best amp that I can use to hook up a Roland SPD 30, I'm looking for one to get volume. ( loud ).


Hi, With my sound engineers hat on I would use a small PA. mixer, amp and speakers!!!!
For quality you need a full, flat frequency range system with good headroom.
I assume this is for your own listening, when using an acoustic kit?
There are one box solutions.
  1. Drum amps. Like a monitor wedge with an amp, Roland do a PM-10, Various other makes are available.
  2. General purpose powered wedge.
  3. Keyboard Amp, these are full range and available in various sizes.
  4. Bass amp with high frequency driver (tweeter), not the best but will have good bottom end.
  5. Powered or active speaker, much like a powered wedge, but a different shape, needs an input volume control.
All these systems need to have large bass units, 10 inch minimum, and will be in mono. Two will give you stereo,
How loud depends primarily on the sensitivity of the speaker. But manufactures insist on selling things by power. Worth looking this up.
At a couple of feet away, 20 watts should do it, with high sensitivity speakers, more likely you find most things as above start at about 70 Watts.
Good luck, I hope I have widened you choices a bit.
All the best, Chris the Fader.

Oct 03, 2014 | Roland Spd-30 Drum Pads

1 Answer

Mpc 1000 loud static


Maybe try adjusting the MASTER level?

Good Luck

Other settings
Adjusting the master level You can adjust the level of the headphone and the stereo out by turning the MAIN VOLUME knob. The MAIN
VOLUME changes the analog signal level. This will also adjust the entire level of the MPC1000 digitally.
01. Press the [MODE] key and then the [PAD 10] (OTHER).
It switches to the OTHER mode.
02. Press the [F1] (GLOBAL) key.
The GLOBAL page will be displayed.
03. In the Master level field, set the level.
You will set the digital signal level, which will be sent out to the DA converter. The MPC1000 can output up to
32 sounds simultaneously. There is the great difference in the level when you play single sample and play 32
sounds. If you increase the value in the Mater level field, you can increase the entire level of the MPC1000 to
create more powerful sound with less noise. However, if you playback many sounds at the same time, the
level may be overloaded, which may cause distortion. If you decrease the value in the Master level field, you
can prevent distortion when you play many sounds at the same time. However, you cannot have a good
result in respect to the noise or punch of the sound. Set the appropriate value in the Master level field
depending on the application.

Mar 31, 2014 | Akai Mpc1000 Music Production Center

1 Answer

My roland cube street starts making this really weird loud noise


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.
Easy fix, re-solder joint. Permanent fix, connect socket to board with flying leads, or fix socket to board with hot glue or epoxy resin.
All the best, Chris the Fader.

Mar 23, 2013 | Roland CUBE Street Amp Combo

1 Answer

Roland f-50 First 7 right hand whites keys appear to have lost volume and sound off / flat.


One of the lines in the keyboard scanner has opened up. I have an idea what it might be and it is a nasty problem involving circuit traces that are silver conductive paint on a plastic insulating base that separate from a jumper at each end of the strip that the key contacts are made by conductive rubber pills pressed down by the keys. The contact of the flexible circuit under the keys to the jumper cable can be broken by vibration. I have an EPS7 with the problem and other than replacing the whole contact strip under the keys it really has no easy solution.You should probably have a Roland shop look at this problem. If your unit has this same arrangement it is repairable only by replacing the whole key contact strip.

Jun 08, 2011 | Roland Digital Piano FP4 Black With Stand...

1 Answer

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.


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.

Apr 11, 2011 | Roland Elektronische Musikinstrumente...

1 Answer

Lowrey catillion organ with loud static noise


Try posting on the organforum.com.

It sounds like the power amp has a problem. Probably filter capacitors have gone bad.

Oct 24, 2009 | Music

2 Answers

I need a free user manual for a roland u-20 rspcm keyboard are there any ???


Found it! My 16 year old musicion picked up one of these and it is in desperate need of repair. I found the manual here:

ftp://ftp.roland.co.uk/productsupport/Manuals/U-20_OM.pdf

Jul 10, 2009 | Roland Music

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