I have yamaha psr-18 piano .,i didnt used for an year ,its not working now .

Yes you may use it as stand alone piano. Usually everytime you will power ON any yamaha psr model piano will appear as default voice.

Try dusting the keyboard with talcum powder. Shake the unit around a bit, so it gets under the keys. That will likely help "lubricate" the keys and quiet down the noise.

It works on my piano. Nwo all I hear are the sour notes I hit!

Try this site: http://www.synthzone.com/yamaha.htm

I have psr s950 Power not on,its the fuse have at this Piano or not?

Download it here:
http://www.manualowl.com/p/Yamaha/PSR-E303/Manual/87376

Yamaha has the user's guides available as PDFs for most of their instruments on their site: http://download.yamaha.com/top/?site=usa.yamaha.com&language=en . Enter PSR-6000 or select Pianos & Keyboards > Portable Keyboards > PSR-6000 and then press Select.

The link to the manual will display below the search area.

I hope this helps.

Cindy Wells

That sounds like a serial number... they are long... The product ID probably isn't needed

rubber contact strip requires replacement

Here ya go...

http://www.yamaha.com/yamahavgn/Documents/KeyboardsDMI/psr79.pdf

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