All other functions appear working okay but nothing on screen which makes it impossible to play any style or anything in the flash memory usb
SOURCE: Instruction manual for a Yamaha PSR 195 keyboard.
Try going to http://www.yamaha.co.jp/manual/english/index.php. There, you can try to find your owners manual for free.
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 PSR-280 : AC power instead of DC power
An answer, but likely not a solution. I believe all Yamaha PSR series keyboards use the same 12 VDC adaptor, so I looked at the electrical schematic for another model I have. There seems to be no fuse on the power input. There are two components shown on the positive and negative wires off the power socket, but the symbols do not look like anything I have seen for fuses - they may be resistors. Power goes directly to a 5 VDC voltage regulator, which powers all of the solid state componenents. Too much voltage of the wrong type could have easily ruined many of the sensitive components.
Your only hope is to check the power socket area for the possibility of having fuses. My drawing shows the power socket, voltage regulator, and audio power amplifier being on one circuit board. That may not actually be the way it is in your model.
Good luck!
(your English is fine)
SOURCE: Yamaha psr-240 lights up but no sound.. no sound
try placing your ear on the speakers, adjust the volume control up and down several times, you should hear a humming sound that goes up and down. if not problem with the stage before the amplifier, that is the sound processor. if you dont hear the hum. problem with the amplifier and speakers, including the sound ports or jack. dissassemble the unit. look for loose connections from speakers to amplifier.
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.
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