Question about Yamaha P85 88Key Portable Digital Piano

1 Answer

I have a Yamaha P70 digital piano and one F and F# stopped working. Then the adjacent G,A,B,C ansd the sharps inbetween would only work sometimes - ususally after the piano had been on for awhile. The n, after a few weeks, these notes would only work after tapping them alot and when they would finally sound, they would make a very loud note before sounding normal. Now I can't get any of these notese to work at all - like the F and F#.

Posted by on

Ad

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    New Friend:

    An expert that has 1 follower.

    Corporal:

    An expert that hasĀ over 10 points.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 10 Answers

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.

Posted on Oct 26, 2013

Ad

4 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad

Fred Yearian

  • 5603 Answers

SOURCE: Yamaha Electronic Piano- certain notes malfunctioning

Either the first or second closure matrix line for the "A" keys is bad.

This may be a cracked or shorted circuit board.

A bank of diodes is used to prevent sneak electrical path if more than one octave has notes pressed.

First thing is to clean ALL the key contact areas and the conductive rubber pills with 99% isoprophyl alcohol.

This involves dis-assembly of the key area. If you are not competent in electronics, best left to a pro shop.

The keys are scanned in a matrix, two contacts per key and all the individual notes are in common (all the "A;s", "B's"...) And each octave is strobed for the first set of contacts and then for the second set of contacts. an the whole octave is read in parallel.

The reason for two contacts is one closes first and then the other as a key is lowered. The time between these is measured and is the note VELOCITY which for a piano controls the loadness of the note. IF ONE of the two fail, the loudness will vary as yours does.

Posted on Nov 27, 2009

Fred Yearian

  • 5603 Answers

SOURCE: as i play notes on

Check if you MIGHT be in a "guide" or learning mode. Some Yamaha synths have a mode that will play and then wait for you to hit the right key before moving on. If this is not the problem, a fix is not DIY and will require repair. I assume you are NOT using MIDI as in that case it is called "dreaded MIDI drone" and is due to data looping back into the unit which is an external fault.

Posted on Aug 18, 2011

Susan Wolding

  • 43 Answers

SOURCE: key doesn't work properlyon yamaha p95 piano

take it back, its still under warranty. That means the key has a contact problem in the circuit. you have to take it all apart, clean it, check the contacts....probably lint. You can try vaccumming it and it might fix the problem. I bought one too and it wasnt good

Posted on May 07, 2012

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Anyone knows what could happen or if there is a chance to be repaired?


Hello, Magda -

Only an authorized Yamaha digital piano (Clarinova) service technician can answer your question regarding a chance of repairing your piano.

If you have not already done so, you can locate an authorized service technician here:
https://www.yamaha.com/paragon/servicerlocator/

Best wishes.

May 03, 2018 | Yamaha Music

1 Answer

Some keys make no sound when played. How do you cprrect this?


try to clean under neath of those particular keys very gently with cotton buds .2)is it the case with in all the octaves 3) has the K.B been in humid places

Sep 29, 2014 | Yamaha P95 Digital Piano

2 Answers

Yamaha P-70 digital piano. A few keys are making a loud knocking noise. The note still sounds, but the knocking noise on the few keys can be heard at the other end of the house


There's an extremely comprehensive pair of videos about repairing this problem on YouTube thanks to David Allyn. I have embedded them below, or you can search "P70 Noisy Keyboard Repair".

Jan 03, 2014 | Yamaha NP 30 76 Key Lightweight Digital...

1 Answer

Key doesn't work properlyon yamaha p95 piano


take it back, its still under warranty. That means the key has a contact problem in the circuit. you have to take it all apart, clean it, check the contacts....probably lint. You can try vaccumming it and it might fix the problem. I bought one too and it wasnt good

May 07, 2012 | Yamaha P-95 P95 DIGITAL PIANO BLACK

1 Answer

Hello, I have a Yamaha P90. 4 keys are not responding. all others are ok and give sound. What happened ?


If they are the same note- different octave- it may be a bad solder joint near the main oscillator IC.

If they are the same cluster (adjacent white keys or adjacent black keys) in the octave, it may be a faulty wire connection.

Apr 01, 2012 | Yamaha P90 Digital Piano

1 Answer

Problem with Yamaha YDP223 Digital Piano - Damper Pedal . The damper pedal on the piano suddenly stopped working (it was working before), but the two other pedals are still working fine. What may be the...


First thing is to check the connector is fully seated... sometimes most of the contacts make but one might not. Beyond that, contacts in the pedal are next suspect.

May 20, 2011 | Yamaha YDP223 Digital Piano

1 Answer

Ydp 223 some keys are starting to stick to on the downstroke when not struck with a perfectly vertical stroke. varying degrees of affliction. instrument 2 years old thanks for any help


Yamaha keyboards can be prone to sticking keys due to the rear part of the key cracking around the return spring - if this is the case the only solution is replacing the affected key modules. However this problem generally only occurs with long term use by very physical players.
Otherwise the problem may be caused by a build up of dust / fluff between adjacent keys - try raking out the spaces with a thin piece of fairly rigid plastic (maybe a credit card might work?)

Feb 24, 2011 | Yamaha YDP223 Digital Piano

1 Answer

I have a Roland HP 101 digital piano however certain dont sound


White spirit is NOT what you should use. Mineral spirit leaves a residue film.

Use 99% isoprophyl alcohol.

ALSO inspect the contactboard for cracks by candeling with bright light behind it.

Oct 31, 2009 | Yamaha NP 30 76 Key Lightweight Digital...

Not finding what you are looking for?

Open Questions:

See all Yamaha P85 88Key Portable Digital Piano Questions

Yamaha P85 88Key Portable Digital Piano Logo

1,165 people viewed this question

Ask a Question

Usually answered in minutes!

Top Yamaha Music Experts

Michial Gueffroy

Level 3 Expert

1140 Answers

Mike

Level 3 Expert

4363 Answers

Brad Brown

Level 3 Expert

18121 Answers

Are you a Yamaha Music Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...