How do i replace one key on Yamaha YDP161?

SOURCE: missing/non-working black key on keyboard

albania

SOURCE: Yamaha PSR 75

You have to completely remove the circuit boards. If this is the keyboard I'm thinking of then the keys are all mounted on the same part like parts on the sprue in a model airplane kit. If its a different one then you have to remove the assembly and take the spring of the key you want and at the other end when you flip it over there is a strip glued on the metal frame to secure the keys that you have to peel off for that sector.

SOURCE: I have a Yamaha PSR-170 that has a jammed key

Most keyboards of that scale are not especially fragile. You may have to remove the back (lots of screws) and maybe a bezel that is across the top of the keys to get full access to the keys. The good thing is you have lots of working models --- all the other keys. So carefully consider the differences. It may be that one or more plastic parts have broken, particularly if it fell and landed with pressure on that key.

Most of the keyboard manufacturers have parts departments that can supply just the part of the keyboard you need if you can specify exactly what you want.

SOURCE: Yamaha PSR 510 -- one of the white keys broke out. Need HELP!

I figured it out. Once the whole 61-key section is unscrewed (I believe its just one screw at the end and it simply lifts off) you have to take a flat head screwdriver and stick it in the top edge of the key rows and twist to force the little tabs out of the slots. Be careful because this is not easy and some of the little tabs might break off - it may not be crucial for the keys to snap back in, though. The first few black keys and the tab above are all one solid piece of plastic. All of the keys are grouped in groups of 3-5 or so as one piece. White keys are layered under the black keys so you must release black key groups to access the white key groups. Once you have forced a key group lose from its snap attachment you must also free the keys from underneath to fully lift the keys off the unit. You have to BREAK the hook shapes found on the underside of the keys (they rest up against the orange rubber lining.) Take wire cutters and snap off all the tips in the key group you wish to remove. Depress a key and watch the movement underneath if you have trouble seeing what I'm talking about - you will see the hooks - think of it as the bottom of the key because that is what it is. The piece you break off should be very small - just enough to remove the hook shape enabling you to lift the keys right out. This will not cause the keyboard to be unusable. It will only make it possible to bend the key up once everything is reassembled. It is the only way I see to free the keys and gain access to the action underneath. As for that...

The action underneath is made up of a pair of rubber cups that when pushed make contact with metal sensors. These rubber cups can tear causing them to fail to pop back up to rest position. I am trying crazy glue to see if this will repair the tear. If not then I will try double-sided tape so that the plastic key will pull the rubber cup back up with it (I hope) when released. Good luck. It is a great keyboard. Very sad to see it discontinued.

This is regarding the Yamaha PSR-510.

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.