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Yamaha NU1 serviced and opened (Lots of pics) #2153148
09/18/13 04:39 PM
09/18/13 04:39 PM
Joined: Nov 2012
Posts: 82
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helloworld1 Offline OP
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I have mentioned in the previous post about the loud key issue in this post:
http://www.pianoworld.com/forum/ubb...%20much%20louder%20than.html#Post2149359

Now I have my piano opened by technician. I have taken several photos! So enjoy. I can answer questions about what I have seen.

1. The action
2. Close up actions
3. Actions with cover removed
4. Hammer
5. Action from front
6. Action from side
7. 45W Twitter speaker
8. A black key
9. Action
10. Action
11. Very close up of the spring
12. Hammer from top
13. Hammer from side


Also a DPBSD
DPBSD

Last edited by helloworld1; 09/18/13 08:17 PM.
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Re: Yamaha NU1 serviced and opened (pics) [Re: helloworld1] #2153166
09/18/13 04:58 PM
09/18/13 04:58 PM
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helloworld1 Offline OP
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The image link doesn't quite work. If you know how to get it working, please let me know.

Re: Yamaha NU1 serviced and opened (Lots of pics) [Re: helloworld1] #2153217
09/18/13 06:14 PM
09/18/13 06:14 PM
Joined: Jul 2012
Posts: 592
Mt View, CA
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xorbe Offline
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Mt View, CA
Next best thing for ya:
Originally Posted by helloworld1

Re: Yamaha NU1 serviced and opened (Lots of pics) [Re: helloworld1] #2153288
09/18/13 07:32 PM
09/18/13 07:32 PM
Joined: Sep 2007
Posts: 15,497
Hamamatsu, Japan
Kawai James Offline
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Kawai James  Offline
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Nice pictures, thank you for posting (and to xorbe for re-linking).

How long are the keys? The action appears a little different to a traditional upright.

Cheers,
James
x


Employed by Kawai Japan, however the opinions I express are my own.
Nord Electro 3 & occasional rare groove player.

"I agree that the User Manual is very good." - arc7urus, March 2019
Re: Yamaha NU1 serviced and opened (Lots of pics) [Re: Kawai James] #2153310
09/18/13 08:09 PM
09/18/13 08:09 PM
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helloworld1 Offline OP
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I haven't measured it, looks shorter than a grand. The action looks quite similar to Yamaha U1 to me, just no damper.
http://www.pianoworld.com/forum/ubbthreads.php/topics/1225419.html

I am no expert on acoustics piano so I might be wrong.

Last edited by helloworld1; 09/18/13 08:54 PM.
Re: Yamaha NU1 serviced and opened (Lots of pics) [Re: helloworld1] #2153342
09/18/13 09:16 PM
09/18/13 09:16 PM
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Posts: 3,540
US
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gvfarns Offline
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Rockin' pics!

Re: Yamaha NU1 serviced and opened (Lots of pics) [Re: helloworld1] #2153397
09/18/13 11:28 PM
09/18/13 11:28 PM
Joined: Dec 2009
Posts: 4,675
Northern NJ
dewster Offline
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[Linked Image]

Wow! That is the funkiest "real piano action" I've ever seen. Though I suppose I'm more used to seeing grand actions.

[EDIT] Added to the Nekid Pichures thread - thanks!

Re: Yamaha NU1 serviced and opened (Lots of pics) [Re: helloworld1] #2153483
09/19/13 03:53 AM
09/19/13 03:53 AM
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Posts: 3,384
UK
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spanishbuddha Offline
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UK
Thanks for sharing the pics. So no physical adjustments to the action to fix your problem?

Just wondering if you saw the sequence for opening it up? I assume you start with the top lid and screws at the back?

Also did he attach anything to run it in debug mode or was it done via some secret combination of the panel and keys?

Last edited by spanishbuddha; 09/19/13 03:54 AM.
Re: Yamaha NU1 serviced and opened (Lots of pics) [Re: spanishbuddha] #2153765
09/19/13 12:56 PM
09/19/13 12:56 PM
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helloworld1 Offline OP
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First remove 3 screws at the back and then remove the top board.
Then disconnect the tweeters and remove 2 screws to remove the front board.
Then remove 2 screws for the key cover.

Re: Yamaha NU1 serviced and opened (Lots of pics) [Re: dewster] #2153778
09/19/13 01:16 PM
09/19/13 01:16 PM
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helloworld1 Offline OP
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Originally Posted by dewster

Wow! That is the funkiest "real piano action" I've ever seen.


Why it seems funky? Looks pretty normal for an upright action to me, almost like the one in textbook for this potion of the action.

Last edited by helloworld1; 09/19/13 02:42 PM.
Re: Yamaha NU1 serviced and opened (Lots of pics) [Re: helloworld1] #2153835
09/19/13 02:34 PM
09/19/13 02:34 PM
Joined: Dec 2009
Posts: 4,675
Northern NJ
dewster Offline
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Northern NJ
Originally Posted by helloworld1
Why it seems funky? Looks pretty normal for an upright action to me, almost like the one in textbook for this potion of the action.

You're right, I haven't seen many modern upright actions. They look kind of spartan / utilitarian compared to modern grand actions.

Re: Yamaha NU1 serviced and opened (Lots of pics) [Re: dewster] #2153848
09/19/13 02:52 PM
09/19/13 02:52 PM
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helloworld1 Offline OP
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Originally Posted by dewster
Originally Posted by helloworld1
Why it seems funky? Looks pretty normal for an upright action to me, almost like the one in textbook for this potion of the action.

You're right, I haven't seen many modern upright actions. They look kind of spartan / utilitarian compared to modern grand actions.


That's true. It is all about cost, especially for digital, there is no need for fancy mechanism and material. Comparing with U1, it has less wood and more plastic smile

Re: Yamaha NU1 serviced and opened (Lots of pics) [Re: helloworld1] #2153869
09/19/13 03:24 PM
09/19/13 03:24 PM
Joined: Nov 2010
Posts: 5,733
Hobart, Australia
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ando Offline
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Surprisingly short key lengths though. I would imagine the difference in feel from the front of the key to the back of the key would be substantial. Not ideal. My Yamaha U3 has a much larger distance to the pivot than the NU1.

Re: Yamaha NU1 serviced and opened (Lots of pics) [Re: ando] #2153904
09/19/13 04:43 PM
09/19/13 04:43 PM
Joined: Jul 2004
Posts: 6,442
Vught, The Netherlands
Dave Horne Offline
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Vught, The Netherlands
Originally Posted by ando
Surprisingly short key lengths though. I would imagine the difference in feel from the front of the key to the back of the key would be substantial. Not ideal. My Yamaha U3 has a much larger distance to the pivot than the NU1.


Could we have two individuals measure the respective distances from the front lip of the key to the pivot point?


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