Yamaha Clavinova CVP 307 Digital Piano - Few notes sound too loudly

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Yamaha Clavinova CVP 307 Digital Piano - Few notes sound too loudly

by Dan
(Independence, MO USA)

A few notes sound too loudly at times on my 2005 make Yamaha Clavinova CVP 307 Digital Piano.

In the range between the first E below Middle C and Bb just below Middle C, there are 3 or 4 notes (most "notably" pun intended E, A, and Bb itself), that intermittently sound fff when they are only played ppp.

They seem to straighten out and play consistently right after the Yamaha Clavinova CVP 307 Digital Piano has been played for, say, at least 5 minutes or so, and rarely surprise from that point.

I have no idea why it does this (probably because I have no idea how the technology inside works).

I've called the dealer repeatedly in the last few months, but their (contract) tech hasn't responded.

Any ideas for my Yamaha Clavinova CVP 307 Digital Piano?

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Yamaha Clavinova CVP 307 Digital Piano - Few notes sound too loudly

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Jan 13, 2012
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Finding this Clavinova piano page was good enough
by: SHINYamAHA21

Dear Dan,
So that was you.
I don't have people around me who are interested in piano. Maybe listeners but players.
Now I found someone had same exact problem on Clavinova CVP307 so I was brave calling you to hear good advice. I had a contact with a tech(Jacobs).I guess soon I will get a service.
Thank you for your comments.
I believe you enjoy your Yamaha Clavinova.
65 is beautiful age in music, isn't it?
Cheers!

Jan 12, 2012
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Clavinova CVP 307 follow up on notes too loud
by: Anonymous

Gee, I'm sorry we didn't get to converse on the phone. For voices of a certain timbre, my phone tends to over-modulate the other party's voice in my ear--plus, I'm getting a bit hard of hearing to be sure. (65-years old...)

I do remember someone calling whom I couldn't make out what they were saying no matter how hard I tried. I certainly apologize if that was you.

Please give me another call, and I'll try to adjust my phone for clarity.

Thanks

Jan 12, 2012
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Clavinova CVP Piano, few notes sound too loudly
by: SHINYamaha21

I just called you to have more specific information about cvp307. same name(answered "this is DAN" but wrong number, I guess.
Getting tech has been a hassle so I thought DAN is a good source to hear some opinion.
What happened? I don't know??

Jan 12, 2012
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Fixing the loud-sounding notes on the Yamaha Clavinova CVP 307
by: Dan

The volume of a pressed key on the keyboard is determined by the number of milliseconds (ms) between the first and second contacts of a pair of electrical contact "pads" against the runs on a circuit board below the pads: less ms (i.e.: the harder the key is pressed), the louder the tone, and conversely. Evidently, a bit of corrosion, film, etc., happens in the sealed area of the contact pads, and messes up the timing between contacts.

The fix is to disassemble the keyboard to the point that the keyboard contact 'modules' underneath can be removed, opened up, and cleaned. (There are four or five modules.) We used Q-Tips, if I remember correctly. A lint-free cloth would work. After cleaning, each module should be blown out with canned air to purge any tiny fibers left over from cleaning.

My tech pinched a couple of wires when reassembling the first time, then left a cable disconnected the second time. Disassembly / reassembly is tricky, but, after watching someone qualified do it, I could repeat the process. But, I've been a tech all my life... You may call my cell phone (816-560-5623) if you want. Have a great day. --Dan

Jan 12, 2012
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yamaha cvp 307 high pitch off key tune
by: SHINYamAHA21

Hi, Dan
I am glad to find this forum.
Recently my cvp307 has been giving me the same problem. I am frustrated.
It reduces my practicing.
I have called Jacobs Music where I've purchased the piano.
I haven't gotten technician service yet.
I am under manufacturer warranty.
Did technician service cost you?
I'd appreciate your reply.

Aug 03, 2011
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Response to George re CVP 307
by: Dan

"I am having the same problem. Was it easy to open and get to the keyboard?" --(George)

Hi, George. "Was it easy?"... If you have extensive experience working on computers, ATMs, electronic business equipment, or similar, the answer is yeah--BUT you have to be careful not to cause collateral issues, which is easy to do.

I had a 37-year career in business machine field service (now 'retired'), and I didn't want to tackle it--mostly because I didn't know how to get the case off, and I didn't want to gouge up the exterior. Now that I know how it's done, I'd do it in a heartbeat.

I don't know if I can recite exactly how to do the job without actually re-doing it myself, but I know there are some things to watch out for. (I had to fix a couple of things the tech missed--even after his second trip out!)

If you don't have significant experience with electronic and/or electromechanical equipment, then the answer is "no--don't try it."--call a qualified tech who has done a few of them.

I'll be happy to discuss it with you if you want to call my cell phone: 816-560-5623.

Dan

Aug 03, 2011
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Yamaha Clavinova KEYBOARD Issue
by: George

I am having the same problem. Was it easy to open and get to the keyboard?

May 05, 2011
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Problem is resolved - Yamaha Clavinova CVP 307 Piano
by: Dan

You are correct. The technician came out, removed the keyboard, disassembled the contact boards from the bottom of the keyboard unit, and cleaned all the copper runs on the board, as well as all the carbon buttons inside the rubber membrane.

I found out that the keyboard attack function is controlled by the time interval between when the first contact makes and when the second contact makes during a given key depression. Very clever--and very reliable!

Anyway, the next time this happens, I'll be able to do the repair myself.

Thanks for your help.

May 05, 2011
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Cleaning the Keys
by: Anonymous

We need to open the unit and clean the keys..sometimes rubber contact is the problem..

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Yamaha Clavinova CVP 307 Digital Piano - Few notes sound too loudly

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Yamaha Clavinova CVP 307 Digital Piano - Few notes sound too loudly