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No service manuals are available, only User Manuals. Contact Roland direct. Tell them your problem, they will give free information or fix for free.

https://www.roland.com/global/search/site_search/?q=service+manual

Roland Audio... | Answered on Dec 23, 2018


Static is usually the result of a bad connection. I suspect there is a bad solder joint. If you are electronically inclined, use a listening device or oscilloscope and connect it to the volume control terminals if it is not present on the input to the volume control then it is the volume control that is bad which happens in old equipment best solution is replacing the volume control or you can try cleaning it with an aerosol product for this purpose.

Roland Music | Answered on Nov 30, 2018


If it hums when running on battery power, either your cable from your instrument needs repair, or it's the wrong type (unshielded or TRS) or your instrument has a problem, or you're in an area that has too much RF or electromagnetic interference.

Roland Music | Answered on Nov 23, 2018


Order the manual directly from Roland.

Roland Juno-D | Answered on Nov 19, 2018


Have you tried a different output cable? I know, it seems simple, but it's often the problem. If you have and the problem remains, I suggest calling the manufacturer to see if there is a known problem. Many manufacturers have a website & service number for resolving problems with their products.

Roland Audio... | Answered on Nov 14, 2018


All rechargeable batteries have a lifespan and they may be nearing their end. It may also be that t your charger isn't putting out what it used to. Best to take it in for repair so they can determine the cause of the problem.

Roland Music | Answered on Oct 30, 2018


What part of it got wet will determine the course of action.

If the whole unit were submerged, the unit may prove more time consuming to try to fix than to locate a used one. However, I have salvaged imersed laptops before. the procedure is not much different- make sure the unit is as dry as you can possibly make by blowing a fan on it for an extended period of time.- Days.

Once dried, use some contact cleaner on the jack contacts and interupts, any manual control and any switch.

You can then apply power. If nothing lights up, check and replace fuses as needed. Also check the power supply board for failed caps or rectifiers.

Once the power supply is known to be functional, systematically check the LCD display and the aspects of the amp that it controls. This board will be the most vulnerable and most likely to be the source of most issues you will encountr.

If the display survived intact, and amp does nto work, apply a signal to the inputs and trace the signal through the amp with a set of headphones set up with test prods. The problem will be where the signal stops.

Roland CUBE... | Answered on Oct 09, 2018


That is the first thing to check. They are most likely inside the circuit board. Remember to replace them with the same voltage and amperage ratings.

Roland Cube-st... | Answered on Oct 09, 2018


lucky you that wants to get burnt
disabling a safety feature is NOT the way to go but fixing the fault that wants you to do so is the way to go

Roland Music | Answered on Oct 09, 2018


Check eBay,you find a nice one there..

Roland Music | Answered on Oct 03, 2018

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