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Yamaha PSR 220 - Problem with dead keys

I have a Yamaha PSR 220 that I bought used. It had a key that did not always work when you pressed it. The seller got it repaired before I bought it. I now have a couple of other keys that do not always work. I understand that it was a fairly minor repair the other time, and I was wondering if it is something I could do myself, especially if this could continue to happen with other keys.




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Yamaha PSR 220 - Problem with dead keys

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Oct 09, 2010
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starstarstarstarstar 		Cleaning Keyboard Contacts
by: Anonymous

If the air/vacuum cleaning does not work it is time to open up the keyboard and clean the contacts. Remove the bottom of the complete keyboard assembly. There are 2 screws hidden under the battery area in addition to those surrounding the keyframe.

Once the unit is open, you will see some long phenolic strips, usually with diodes on them, that span the length just behind the keys. You need to remove these by springing the 4 or 5 plastic clips that hold them in. The underside of the phenolics has the contacts-little zig-zag etchings. Clean these with a pencil eraser. Under the strips is a rubber membrane with the other half of the contacts. They can be carefully removed. Clean these as well. Do not use a solvent as this may dissolve the rubber.

I would not buy a Yamaha product in the future. I asked them to email me the schematics and service manual and they would not since I am not a dealer. This is not my idea of customer support. I do not know if they will send customers replacement boards.

Fritz

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