Roland Super JX-10

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Lovecraft
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Roland Super JX-10

Post by Lovecraft » Thu Jul 16, 2015 3:39 am

Hi...

I own a Roland Super JX-10 76-key Keyboard which has been in storage for quite sometime. I took it out (big, heavy analog board). However, to my surprise it started right up and sound magnificent at least until I took I noticed 7 white keys no longer produced sound.

Never ran into an issue with the keys not working properly. I'd love to get it fixed... Whether I keep it or not. Wondering though how do I get it fixed. There are no repair services for this type of synth equipment around here I know of.

QUESTION: What do the rest of you do with an instrument this size? It's large and heavy so sending it out for servicing is rather expensive and I don't know where to even begin looking where I can find a local or some what local place to repair it

Any guidance? I'm in the Philadelphia area. Thanks! :?:
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commodorejohn
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Re: Roland Super JX-10

Post by commodorejohn » Thu Jul 16, 2015 3:56 am

I'd just open it up (carefully, I'm not sure how complex it is inside) and pull out the keybed. It's a rubber-bubble-strip variety, so it should be pretty simple to pop the keys, take the strips off (gently, you don't want to rip the little "posts" that hold them against the PCB!) and clean the contacts (Q-tips and rubbing alcohol should suffice.) That's usually all a rubber-dome keybed needs.

(Though before you take it all the way out - are the malfunctioning keys grouped in any kind of regular pattern? It might just be a loose wire - check the connectors and make sure everything looks solid.)
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Lovecraft
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Re: Roland Super JX-10

Post by Lovecraft » Fri Jul 17, 2015 4:06 pm

No unfortunately the keys aren't in any order... they are random and also I noticed this morning one of the keys (the highest "D" note) is broken completely (not in half or cracked just no spring to it). I'm a bit nervous about opening it up. I've been trying to figure how. It has a "wood/plywood" type bottom to it with hinges (is the normal?) and I can't figure out how to slip the top of it to reach the keybed. I have no experience with this Keyboard as far as repairs. Screws everywhere. I'm wondering if I should just buy a 76 Key Keyboard bag and take it to a repair shop. I just am not sure how much something like this would cost or to repair or even a reliable place to take it in the Philadelphia suburb area.

Is the wood bottom normal? It is tough to replace the strip you were talking about.
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commodorejohn
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Re: Roland Super JX-10

Post by commodorejohn » Fri Jul 17, 2015 7:10 pm

If they're random I'd bet you money it's just dirty contacts; if you can get in and pop the rubber strips for a good cleaning, it'll probably clear right up. (It's usually not tough to replace them, you just have to remember to go very gently when removing them so you don't tear the "posts" that hold them to the PCB. My advice is to gently push the posts out through the hole from the other side.)

As for getting into the keyboard, the wood bottom is what's on mine, but I've never gotten inside myself. I'll take a look when I get home from work.
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Lovecraft
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Re: Roland Super JX-10

Post by Lovecraft » Sun Jul 19, 2015 1:54 pm

commodorejohn wrote:If they're random I'd bet you money it's just dirty contacts; if you can get in and pop the rubber strips for a good cleaning, it'll probably clear right up. (It's usually not tough to replace them, you just have to remember to go very gently when removing them so you don't tear the "posts" that hold them to the PCB. My advice is to gently push the posts out through the hole from the other side.)

As for getting into the keyboard, the wood bottom is what's on mine, but I've never gotten inside myself. I'll take a look when I get home from work.

Hi...

I fixed a key I thought was broken... but it didn't have anything to do with opening it up.

Did you ever get a chance to give a look-see and find out if you could open up the JX-10?
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fh991586
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Re: Roland Super JX-10

Post by fh991586 » Tue Jul 21, 2015 8:41 pm

If you do have another keyboard, check out if all notes of the JX-10 can be triggered via midi before opening it up. If some still don't work, then it's a chip that needs fixing instead of the keyboard assembly.
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Lovecraft
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Re: Roland Super JX-10

Post by Lovecraft » Wed Jul 22, 2015 9:59 am

fh991586 wrote:If you do have another keyboard, check out if all notes of the JX-10 can be triggered via midi before opening it up. If some still don't work, then it's a chip that needs fixing instead of the keyboard assembly.
That's a good point. I'll give it a test run and find out if it's the keys.
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zaphod betamax
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Re: Roland Super JX-10

Post by zaphod betamax » Fri Jul 24, 2015 3:54 am

Can you see if the non-sounding keys are 8 or whatever semitones apart. I had a JX-3P with a bad solder trace that corroded, and I bridged it and it was all fixed
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