I have an old but functional yamaha PSR 31 keyboard. I am not sure of the size of the jack required for headphones. Help would be much appreciated

Try cleaning the headphone jack. If that doesn't help, it'll be the amplifier board and will need to go to the shop.

I'd suspect power supply first - filter capacitors may have leaked/dried out. That would be an easy fix for someone familiar.

Open up to clean/replace the sockets

http://music.manualsonline.com/manuals/mfg/yamaha/psr620.html there you go please give me some thumbs up!

Register and download the manual for free at retrevo.com

http://www.retrevo.com/support/Yamaha-YPT-220-Music-Keyboards-manual/id/23656ci473/t/2/


#27 on page 11, rear panel.

We can only guess what keyboard you might have. Maybe it has built in speakers or requires external speakers.

Usually on the keyboards there is a headphone jack. The jack disconnects output if headphones are in. Some keyboards have mute functions. Some use rotary volume controls, some use sliders... The controls can become damaged causing problems.

We don't have ESP to know what model you have and can give no further help without the model number. Always post as much detail and tests you have run.

My keyboard yamaha psr2000,so I want parts silicone rubber keypad 61 and including electronic board,thank you.

rubber contact strip requires replacement

Make sure you use correct power supply.

Try headphones. If they work, then the switch on the headphone jack that disconnects the speakers may not be working properly and not connecting the speakers.

I don't have a parts source for these other than Yamaha. Call them up to get the part number for the board. The sound is usually sent through the headphone jack which acts as a switch when you use headphones. Replacing that board should resolve your problem. If the board is no longer available, it is possible to repair the existing one, but this is a specialty task and not one I would recommend a novice attempt.

Please keep us posted on your progress,
Dan