Hi I have a sharp portable AC unit model CVp 10lc works for 1hour

A computer :>D

https://www.manualslib.com/manual/374549/Yamaha-Clavinova-Cvp-307.html?page=192

https://www.google.com/search?q=Yamaha+CVP-307+read+Midi+files

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The Yamaha CVP-601 can be transported fully assembled. However, yes, it can be disassembled if desired.

Your owners/operators manual will detail the procedure.

Click here if you do not have one: Yamaha Clavinova CVP 601 Owner Manual Assembly Preparation Before...

https://www.manualslib.com/manual/196689/Yamaha-Clavinova-Cvp-83s.html

The rendered MP3 waveforms are probably too low.
Download a free App Audacity then load an MP3 recording into it.
A normalized file should show average level of 0.5 dB or more, up to max 1.0 dB.
The Clavinova may need pre-amplification.

There is a well documented problem that occurs with the keybed on some of these models due to a manufacturing fault. Take a look at the keys that are sticking. Is the gap on either side of the key the same ? If not then the key normally leans slightly to the left rubbing on the adjacent key causing the sluggish action. The fixing tab at the back of the key breaks causing the spring pressure to push sideways.

You can just replace the offending key but the problem will eventually return. You could replace the whole keybed but this is a very expensive fix.

Keys are around £ 15.00 each.
Replacement keybeds around £ 450.00

Visit www.beckettsmusic.co.uk

Search for VU101 via the search box.

Central Venous Pressure is a measure of the blood pressure in the vena cava. It is used to estimate the flow volume but is not a measure of it. This is not normally affected by footwear and adjusting the flow volume can't accurately predict the CVP.

i have a broken cvp-85a but the pedals are ok so?

how opening yamaha cvp-700

I SUSPECT that the CVP 409 will ONLY talk to the Yamaha USB floppy drive, not a hard drive or memory stick.

The internal drivers for these musical instruments do not have the "smarts" to talk to the wide variety of peripherals that PC's are able to.

I can't solve the problem, but just wanted to sympathize because I have the same problem. My pedal is broken on my Yamaha Clavinova cvp85a. It worked wonderfully for years but finally it broke.
I'd be in the market for buying a new pedal or fixing the old one. But I've not found any suggestions in any of these forums for either solution.