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Yamaha P70 repair suggestions
#2594617 12/13/16 09:45 PM
Joined: Dec 2016
Posts: 1
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bercy46 Offline OP
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Hi,

I have a 6-7 year-old Yamaha P70 keyboard that's been acting up.

There's no better way to explain the problem than to simply see it :

https://drive.google.com/open?id=1ZSItSvnS_6zwv4EovXzWsw92bPgdE-JpKg

Does anyone have an idea on how to repair such a problem (if you can't see the video, there's a 6-7 key range of keys on the keyboard that all play multiple tones at the same time).

I did look for a factory reset procedure, some suggested I turn on with the far-right white key pressed, others mentioned the last 3 black keys with the last white key, tried them both, doesn't seem to work.

Thanks for any suggestion.

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Re: Yamaha P70 repair suggestions
bercy46 #2594625 12/13/16 10:22 PM
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Aren't there broken strings?

Can you open the piano and take a video of the hammers hitting the strings?


Re: Yamaha P70 repair suggestions
bercy46 #2594627 12/13/16 10:24 PM
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Have you played those keys when the piano is turned off? How do they sound?


Re: Yamaha P70 repair suggestions
bercy46 #2594632 12/13/16 10:47 PM
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Have you posted to the Digital Pianos, Synths and Keyboards Forum?


Dale Fox
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Remanufacturing/Rebuilding
Re: Yamaha P70 repair suggestions
bercy46 #2594922 12/15/16 02:10 AM
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For your information.

The piano keyboard is 1A to 88C

Enter Test Mode Nd check following test.

1:turn on power switch with 29C#+33F+36G#(Cmaj) and held few second.
2:Beep 440Hz sound
3:press DEMO Song
4:press 45F TG check autoscaling all keys and tones.
if you could hear normal sound .DMboard is OK. keyboard unit has problem.
5:Press Demo song
6:press 88C exit test

please try transpose .
1key up
play B
if you could hear normal C then DM board is OK.

I recommend you to try remove keyborad assembly and check keyboard cicuit board ,connector and rubber contact switches.




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Pro-TAC tuning and repair service.
pro-tac.jpn.org/
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