Yamaha P85 88Key Portable Digital Piano - Answered Questions & Fixed issues

1) Try a partial reset by holding down the last white key while turning the unit ON. 2) If you haven't recorded any performance(s), for a full reset, hold down on the last white key AND THE lst three black keys while turning the unit ON.

This will be a problem with the key contact sending the wrong velocitiy. To verify, hook it up to a midi source and see if the same thing happens in the connected device. If so, it will need to go into the shop for repair.

needs to be looked at

Here are the links you need for that- http://download.yamaha.com/api/asset/file/?language=nl&site=nl.yamaha.com&asset_id=8597 http://www.eanubis.net/Yamaha/Yamaha-KorgFactoryResetList-ver001.pdf

Resetting Instructions: 1) Try a partial reset by holding down the last white key while turning the unit ON. 2) If you haven't recorded any performance(s), for a full reset, hold down on the last white key AND THE lst three black keys while turning the unit ON.

Reset Instructions: 1) Try a partial reset by holding down the last white key while turning the unit ON. 2) If you haven't recorded any performance(s), for a full reset, hold down on the last white key AND THE lst three black keys while turning the unit ON.

Check the DC adapter. It may be shorted/broken. This type of stuff happens sometimes.

I just experienced my p85 with a key problem on the F# below middle C. You will need to disassemble the keyboard and usually the keys are groups of 6 - 8 keys. If you remove the group that has the problem you might be able to find the problem visually. Mine just involved removing and reinserting the F# key back into the assembly. Then reinstalling the group of keys. If you can't get the key to work properly, you will probably need to buy the group assembly from Yamaha.

What adapters have you tried? The P85 REQUIRES a 12 VAC adapter, NOT the common DC type and it needs a 1.5 amp (1500 ma) type adapter. If you connected a DC adapter it will NOT do damage, the unit just won't work. You can find adpaters on Ebay or Google search.

get it looked at

Check your manual. You should have an option to enable and disable the touch sensitivity.

The key scanning matrix cable/circuitry has lost two of the connections. Could be either a loose cable or worst case a cracked circuit board under the keys.

Refer to your user manual on page 21:

FIRST do the reset of the transpose. THEN do the fine pitch adjust if needed.

In playing fast you have to make sure to release the note fully and let the key come up. These keys have TWO contacts that are used in the scheme to measure note velocity. If BOTH contacts don't open, the note will NOT re-fire. The second symptom you have written would be a characteristic if one of the disconnect diodes has shorted. These diodes direct the strobe signals that scan the matrix of key contacts to avoid other octaves responding when multiple keys are depressed including those in other octaves. Servicing of the unit is required. It is unlikely you have the tools to DIY this problem. ONE THING to try is to tip the unit and gently tap it to see if some debris MIGHT have fallen in that may be shorting some of the matrix connections.

Hi, what causes clattering sound in key boards are when the rubbers inside the key board are getting weak and it needs to be replaced.It's not a normal thing.

Secondly, The idea ofdisassemblythe keyboard is a Good idea ,but i would not advice you to do that,cause keyboard issues are very delicate and fragile to handle..

finding parts out, i will give you links to guide you.

http://www.computerhope.com/comp/yamaha.htm


Contact the above link they will link you up to their company in Sweden if there is any..


Good luck..

The graded action is only that there are different counterweights on the various keys. They are a sort of "J" shaped pieces of steel that vary in length. I don''t know how the graded part could stop working, as they just vary the key "feel" across the keyboard. Are you saying this key "feel" has been lost?

It is IMPORTANT to realize that the SUSTAIN is NOT attached to a note, but is an independent MIDI message. Hence it is up to the external MIDI device to associate the sustain with whatever notes are still active.

Follow the Yamaha guide I sent you. https://uk.yamaha.com/en/support/updates/firm_psr-s950.html

Usually that is caused by corrupted software. Try reloading the firmware. https://europe.yamaha.com/en/support/updates/firm_psr-s950.html

YAS-23 was introduced around 1980. More info here...... https://www.saxontheweb.net/threads/why-are-yamaha-serial-s-a-guarded-secret.61854/