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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Re: Roland keyboard. Extremely static-y speakers. Cuts...
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.
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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.
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!
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.
You left off the one bit of info we need... however, make sure the volume control on the keyboard is around the halfway point... If it is way down, turn it up and reduce the channel volume knob some. Make sure the cable from the keyboard is an instrument rated interconnect and not one intended for speaker (usually marked as such). Make sure the keyboard AND this amp are powered from the SAME receptacle... even if you have to run an extension cord. Listen with headphones on your keyboard to make sure the sound is clean there.
Sorry, but Roland uses the opposite sense switch. They use normally closed where Casio requires normally open contacts. SOMETIMES one can rewire the pedal internally, but you have to be mechanically and electrically inclined to do that.
your sound process digitaliser has burned out the crackling should have warned you as to the fault and had it replaced (fixed) right away this is a simple repair but does need to be done by an electronics tech
Theres a good article at recordingreview.com. If you join which is free you have access to a lot of great information. You can download Midiox to troubleshoot your midi connections etc. Make sure that your transmit channel on your keyboard matches up with the receive channel in your program. Hope this helps.