Yamaha P95B digital piano no sound. Tried all the obvious so now to checking some voltages but I need circuit diagrams?

SOURCE: Sticky Keys for Yamaha Digital Piano YDP-121

have you tried using the can of air. you can get it at almost any drug store walmart or kmart. just spray the can of air between the keys and they should become unstuck.

SOURCE: Looking for circuit diagrams for yamaha dx21

Have you managed to locate a DX21 service manual yet?? What problem are you experiancing with the 21?? From your request notes you mention 'all audio sections are live', do you mean that you have no audio from the 21?? Most faults i have experienced with the 21 are, failure of the main OPP YM2164 fm chip and associated D/A convertor(YM3102). In some cases YM3102 is ok .When the YM2164 fails, DX21 will boot as normal but no sound whatsoever from the audio out's. YM2164 is the main tone generation ic. Also when YM2164 is replaced, if sounds are reloaded back into the memory areas from ROM and the display reads gibberish in certain memory areas then a ram or rams have failed also. The crunch, Don't expect to get a YM2164 and Associated components easily, these things are very rare. I have seen the YM2164 fetch £35!! Best way around this, if you are eager to repair the synth is to purchase a working YAMAHA FBO1 FM MODULE ,not a popiular module and sell for about £20 - £50 on ebay. You can rip the parts out of the unit and use them in the 21. Sell whats left on EBAY spares or repairs.
The damaged (i believe) is caused by failure in the powersuppy causing voltage rails to 'spike'. What is strange is the cpu stays in tact. Capaitor replacements can cure this problem. I have a complete circuit diagram i can scan and email to you for a small fee for my time if required . email me:- [email protected]

SOURCE: Keys sticking on Yamaha p120 digital piano....how do I open it up

you may not need to open it up.
try using a wax based furniture polish on the keys, it will leave a layer to act as a lubricant between the keys.

SOURCE: Yamaha P-200 electric piano does not have any

Plug in your ear phones to see if you can hear the sound that way. If not you are experiencing some internal failure in your integrated amp output.

In that case you will need to get authorised service.

SOURCE: Yamaha CLP-860 Digital Piano Keys Making Noises

The part numbers are only available through the Yamaha Corporation. The Service manual, which is available for purchse (note that this is NOT the owner's manual) will have them.

I repaired mine on my own. I used a sticky foam tape of the correct width (approxiately 3/8 wide) and overlaid one layer directly over the original felt pad. I used a white foam tape like is used for carpet or other indoor needs. If I were doing it again I would probably use something just a little thicker and softer than what I used (appx. 1/16 thick).

Disassembling the Clavinova and removing the entire GH88 keyboard for this work is not hard if you are even moderately handy. I had the entire mechanics of the unit laid bare in 45 minutes with no manual (and not one curse word).

I am going to write up a tutorial on this soon as many people have asked about it.

By th way, I have heard that the factory pads are $100. My solution cost me about $3. Even if I have to do it again in a year, it's a win.