Electronic Keyboard Goes Out Of Tune

[Hornbein]

One of my Yamaha electronic keyboards has gone out of tune. It's 1% flat. It's not a problem -- I just tune it up so I'm not looking for a cure-- the point is I'm surprised that this is possible. I thought digital musical devices couldn't go out of tune.

 

[Baluncore]

Interesting.
What is the model, and what year was it made.
How do you tune it up, maybe that adjustment device is failing?

 

[hutchphd]

Yes.. Does it have an adjustment to put it out of standard tune (perhaps to play with elderly "more tender" instruments? It is hard to bend a quartz crystal by 1%.

 

[Hornbein]

Interesting.
What is the model, and what year was it made.
How do you tune it up, maybe that adjustment device is failing?

Yamaha PSR-E473, 2024. It has many adjustable features, including tuning. I have to set A 440 to 444 to get it to conform to the rest of the world. It just started doing that recently.

It might have been the computer that I get my music from but no, my other keyboard is still in tune.

 

[DaveC426913]

Top up the battery?

 

[Tom.G]

See functions 55 thru 58 on page 65 of the user manual.
Make sure that each of those four settings are as expected.

User Manual available at:
https://jp.yamaha.com/files/download/other_assets/8/1543938/psre473_en_om_a1.pdf

Above found with: (same search found a technical manual)
http://www.google.com/search?hl=en&q=service+manual+Yamaha+PSR-E473

Cheers,
Tom

 

[Hornbein]

See functions 55 thru 58 on page 65 of the user manual.
Make sure that each of those four settings are as expected.

User Manual available at:
https://jp.yamaha.com/files/download/other_assets/8/1543938/psre473_en_om_a1.pdf

Above found with: (same search found a technical manual)
http://www.google.com/search?hl=en&q=service+manual+Yamaha+PSR-E473

Cheers,
Tom

All normal.

And I don't use batteries.

 

[Hornbein]

Today after 23 days the keyboard spontaneously returned to A 440.

 

[DaveC426913]

Today after 23 days the keyboard spontaneously returned to A 440.

Sunspots. It's always because sunspots.

 

[Baluncore]

Today after 23 days the keyboard spontaneously returned to A 440.

Most (pseudo-scientific) biorhythm models, use three cycles: a 23-day physical cycle, a 28-day emotional cycle, and a 33-day intellectual cycle.
The 23-day time suggests there is something physically wrong with the components, the connections or solder joints. Check it for physical vibration sensitivity, by tapping the electronics gently with a drumstick. Pick your tune.

 

[Tom.G]

Today after 23 days the keyboard spontaneously returned to A 440.

Now we wait to find out if the failure cycle is a square wave.