There are some keys which do not play. and some other keys, which while playing in touch mode sound extremely loud. Can you please tell me what the problem could be. Is it advisable that I open up the keyboard and clean all the dust? If yes, how can that be done..? I feel, that a lot of dust may have accumulated. Need your help. Thanks
Hi, This is probably due to worn rubber contacts. The sound is switched by pressing a key which in turns press a carbon contact on the PCB under the key. In time these wear out and need to be replaced.
Firstly open up the keyboard and locate the rubber contacts, check to see if each one is seated squarely, if they are not seat straight then this can create the problem you mention.
If all are OK then you will need to replace the strip which is causing a problem.
Spares are available from many sources including :
http://www.beckettsmusic.co.uk/shop/scripts/prodView.asp?idproduct=16049
Hi, This is probably due to worn rubber contacts. The sound is switched by pressing a key which in turns press a carbon contact on the PCB under the key. In time these wear out and need to be replaced.
Firstly open up the keyboard and locate the rubber contacts, check to see if each one is seated squarely, if they are not seat straight then this can create the problem you mention.
If all are OK then you will need to replace the strip which is causing a problem.
Spares are available from many sources including :
http://www.beckettsmusic.co.uk/shop/scri...
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SOURCE: How do I take apart Yamaha PSR-280 keyboard to clean keys.
There are 17 screws on the underside of the keyboard that need to be removed. The base cover can then be removed. This gives access to the keyframe assembly which can be removed.
SOURCE: Yamaha PSR-510 Keyboard
There is no need for a manual. It is so easy to operate because it is designed for easy opeating. If you need a manual to operate the PSR-510 then you really won't be able to operate it even after studying the manual. But here it is just in case you can by some miracle!
http://www2.yamaha.co.jp/manual/pdf/emi/english/port/PSR510E.pdf
SOURCE: Yamaha keyboard not working
First thing is to verify the power supply voltage, including that on the board.
This can affect the threshold of the keyboard scanning and cause keys to not work although some other things appear to work.
Replacing that chip in the filed is not practical, so whole board would be considered the FRU. One can probably get one from Yamaha America parts in CA.
Before doing that, checking the scanning signals and feedback from the keys needs to be checked with a scope. Also verify that the analog power amp section is working.
SOURCE: Yamaha PSR S900 keyboard failure, in touch
That is NOT touch response, but velocity sensing. Each key has two contacts and one closes before the other to facilitate measuring the key velocity. In your case, it sounds like the key you are holding down has a bad disconnect diode in the key matrix and is holding the "first contact" signal true so the next key senses max closure speed. If you are not electronically adept, you need to take it in for servicing... however first tip the thing and vibrate it as some contamination MAY be shorting a line in the key matrix. Staples and paper clips are notorious problems with keyboards when they get into the key area.
Testimonial: "Thanks, I'll try shaking the keyboard as this suggestion is more consistent with the symptoms...the failure is not permanent. It come and goes. Thanks"
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