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Posted on Jan 02, 2017
If it is in an area that you play a lot it might be the membrane contact strip that needs to be replaced. They come in sections and can be replaced with some careful work with the right parts if they are still available. If the membranes themselves are ripped they usually have to be replaced. If the contacts in the membranes are dirty they need to be carefully cleaned. In your case as it is a section of notes there may be a connector that has worked loose (not usual but possible). Further than that requires the schematic and tools and troubleshooting electronics experience. If you are not comfortable with tackling this yourself contact several musical equipment dealers that sell Roland products for their opinions and prices per hour for repairs. Also check piano tuners and repair places for advice. Hope this helps.
Posted on Aug 07, 2009
It sounds as if the membrane under the key needs to be replaced. It can be done with some careful work yourself but you might want to consider having it serviced by a Roland dealer as apparently the parts are becoming scarce. Hope this helps.
Posted on Aug 20, 2009
White spirit is NOT what you should use. Mineral spirit leaves a residue film.
Use 99% isoprophyl alcohol.
ALSO inspect the contactboard for cracks by candeling with bright light behind it.
Posted on Nov 01, 2009
Testimonial: "bur isnt it strange that certain keys have stopped working? ie most the A keys"
You either did not get the ribbon cable seated OR got it upside down.
If this cable is the flat ribbon with exposed solder plated points of contact, OFTEN those connectors have a latch to release by GENTLY moving tabs on eaither side in the direction of pulling the cable out. This lock MUST be moved out slightly to allow the cable to seat properly. The solder plated contacts will be FULLY into the connector when seated properly.
These cables ALSO can be inserted backwards and NO connection will be made.
Posted on Feb 14, 2010
You probably need to just clean the circuit board and the conductive rubber contacts. There are two per key to facilitate reading the key velocity.
Use 99% isoprophyl alcohol and Q-Tips to clean both the board and the rubber contacts.
A rod is inserted lengthwise to hold the hammer weights while removing the boards. Use dowels from each end inserted about halfway back between the keys and the weight rods. Use a 1/4 inch dowel rod.
You have to take out a few screws to remove the boards from the key assembly. Be careful of the cables.
Posted on Mar 17, 2010
Testimonial: "Thank you so much for your information. This gives us a clue. Can't wait to get this fixed. I really appreciate your help."
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