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Roland JX-3P strange setting? Please help
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Brogram



Joined: Nov 18, 2008
Posts: 36
Location: NYC

PostPosted: Sun Oct 02, 2011 11:39 pm    Post subject:  Roland JX-3P strange setting? Please help Reply with quote  Mark this post and the followings unread

Hello all,

My newly acquired jx3p seems to be in great working order except for one very big issue. The lowest 8 keys of the synth (instead of triggering notes) trigger different memory bank locations, tape memory activation and sequencer operation?! I'm really confused by this as I used to own a JX and also can not find any info online about this weird mode. Besides this I'm still able to use all other functions properly. Hmmm

Best,
Eric
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YashN



Joined: Jun 27, 2011
Posts: 64
Location: Canada

PostPosted: Mon Nov 14, 2011 7:51 pm    Post subject: Reply with quote  Mark this post and the followings unread

Very odd. Have you opened it?
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Brogram



Joined: Nov 18, 2008
Posts: 36
Location: NYC

PostPosted: Tue Nov 15, 2011 11:14 am    Post subject: Reply with quote  Mark this post and the followings unread

Yea it was a bit dirty on the inside and someone suggested it may be a short in an IC caused by dust. It has stopped it's strange behavior recently and now it only happens every 10th or so time I turn it on. Im gonna have to clean it out again and see what happens. One of the keys doesnt trigger sound but that can be fixed with some rubbing alcohol correct?
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YashN



Joined: Jun 27, 2011
Posts: 64
Location: Canada

PostPosted: Tue Nov 15, 2011 11:33 am    Post subject: Reply with quote  Mark this post and the followings unread

A good cleaning of the circuit with alcohol or acetone should help.

For the keys themselves, check whether there are these strips of metal contacts beneath like the Roland JX-8P and the Korg DW-8000. If so, you can try spraying the contacts with a contact cleaner, once between the middle contact and the lower one, and then after pressing each key, between the upper contact and the middle one.
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