Question about Roland Juno-D

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

When I turn the keyboard on (using the built in spkrs) I get a lot of crackle/static in the speakers. As I move the volume control it gets worse. After about 50% volume, speakers cut out completely and I get no sound. If I run the keyboard through an external tuner/speakers can I bypass this problem, whatever it is? Are my speakers blown or something else? Is it repairable?

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  • kuldeep143s Mar 16, 2009

    lcd +out put sound

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  • 1,137 Answers

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.

Posted on Apr 23, 2009

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1 Answer

My Roland FP8 plays very quietly through its own speakers, through an external amp & speaker and through the earphones. There is a hissing/crackling/static sound too from the speakers. Anyone


A number if things can be wrong with it, from the audil preamp to the the audio amplifier. Even as simple as a bad volume control. Does the actual noise change patterns when you move the volume?

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Static crackling sounds


Replace the speakers or let it be repaired by some one.their may be rust near the speaker coils.just giv it a try.

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After hooking up the PA for practice, I heard a loud "pop," then followed by a burn smell, from my Mackie SRM 450 speaker, which I use as a monitor. No sound comes through but static and crackling. Is the...


The pop itself isn't necessarily a bad thing, but a burn smell and the fact that it's only outputting a crackle likely means that the built-in amplifier circuitry has been overloaded. This can happen a few ways:
1) Faulty power, either a bad cord or a bad outlet
2) Plugging the output of a power amplifier into this speaker - because it has a built in amplifier, this speaker only wants a non-powered line input
3) If the Thru output is (accidentally) plugged into anything that provides phantom power, that could overload the circuitry.
4) A short due to liquid or moisture contact - these cabinets are most certainly not waterproof
In any case, the amplifier part of the circuitry IS replaceable. If you're not comfortable buying one and replacing it yourself (I'd recommend eBay), take it to any shop that sells similar items. If you're extremely lucky, it was just a fuse that needs to be replaced, but chances are you'll need to replace the whole amp.

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Replacing the electrolytic capacitors in this keyboard would require you to be somewhat experienced in electronic soldering, especially the surface mount electrolytics. You should be able to find how-to videos on YouTube if you are curious. You also probably do not need a service manual. The values of the capacitors should be printed directly on them. Replace them all. Replacements can be ordered from Mouser. BUT, I suggest at least bringing in a friend that has experience with these types of repairs. These circuit boards are not designed for inexperienced soldering!

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1 Answer

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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.

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