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#2050950 - 03/19/13 04:05 PM Kawai CN34 "hum"  
Joined: Feb 2013
Posts: 6
Ian Lash Offline
Junior Member
Ian Lash  Offline
Junior Member

Joined: Feb 2013
Posts: 6
United Kingdom
I received my new CN34 yesterday. It looks great, but when I turn it on I hear a hum. I have nothing else connected to it (so I presume it's not a "ground loop"). The volume of the hum does not increase with the volume control. It's definitely an electrical hum, not a part of the case vibrating. When my wife sat in front of it for the first time she said "I can hear a hum", which wasn't a good start.

Is this to be expected? Should it be completely silent without a key being pressed? I didn't hear the hum in the shop, but there was a lot of background noise then.

I have informed the supplier, but just wanted to make sure this is not normal.

Many thanks,
Ian

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#2050962 - 03/19/13 04:14 PM Re: Kawai CN34 "hum" [Re: Ian Lash]  
Joined: Aug 2012
Posts: 736
Scott Hamlin Offline
500 Post Club Member
Scott Hamlin  Offline
500 Post Club Member

Joined: Aug 2012
Posts: 736
Bummer - Have you tried plugging it
into different outlets in the house?

Also, does it have an external power supply?

#2050973 - 03/19/13 04:35 PM Re: Kawai CN34 "hum" [Re: Ian Lash]  
Joined: Sep 2009
Posts: 5,197
MacMacMac Offline
5000 Post Club Member
MacMacMac  Offline
5000 Post Club Member

Joined: Sep 2009
Posts: 5,197
North Carolina
Send it back. Defective new merchandise should not be tolerated.

#2050993 - 03/19/13 05:16 PM Re: Kawai CN34 "hum" [Re: Ian Lash]  
Joined: Feb 2013
Posts: 3
PratO Offline
Junior Member
PratO  Offline
Junior Member

Joined: Feb 2013
Posts: 3
Canada
I don't hear a hum from mine so It's definitely not normal. I'd follow up with the supplier.


Kawai CN34
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#2050995 - 03/19/13 05:21 PM Re: Kawai CN34 "hum" [Re: Ian Lash]  
Joined: Feb 2013
Posts: 6
Ian Lash Offline
Junior Member
Ian Lash  Offline
Junior Member

Joined: Feb 2013
Posts: 6
United Kingdom
Thanks all. I just wanted to make sure it wasn't normal. @Plink88 - no, internal power supply. I've changed the power lead and tried a different socket. @Prat0 - the noise is loudest underneath, just to the left of the power cord input. If you can't hear it then mine must be faulty, as it's pretty obvious to me and my family.

The supplier has asked me to send them a recording of the sound, so I'll see what happens. They've been very helpful and apologetic so I'll see how this goes.

Cheers


Kawai CN34
#2051009 - 03/19/13 05:42 PM Re: Kawai CN34 "hum" [Re: Ian Lash]  
Joined: Sep 2007
Posts: 13,076
Kawai James Online content
Yikes! 10000 Post Club Member
Kawai James  Online Content
Yikes! 10000 Post Club Member

Joined: Sep 2007
Posts: 13,076
Hamamatsu, Japan
Hello Ian,

I'm sorry to read that your CN34 arrived with a defect. I expect the problem is related to the power transformer. This component can typically be replaced, however it may well be preferable to ask the store to provide a new piano.

Either way, please report this issue to the dealer and allow them to resolve the problem.

Kind regarsd,
James
x


Employed by Kawai Japan, however the opinions I express are my own.
Nord Electro 3 fan & occasional rare groove player.
#2051750 - 03/21/13 05:48 AM Re: Kawai CN34 "hum" [Re: Kawai James]  
Joined: Aug 2010
Posts: 3,494
pv88 Offline
3000 Post Club Member
pv88  Offline
3000 Post Club Member

Joined: Aug 2010
Posts: 3,494
Originally Posted by Kawai James

Kind regarsd,
James
x


James,

Did I catch a typo, above? grin

#2051990 - 03/21/13 02:21 PM Re: Kawai CN34 "hum" [Re: pv88]  
Joined: Sep 2010
Posts: 424
Temperament Offline
Full Member
Temperament  Offline
Full Member

Joined: Sep 2010
Posts: 424
Hun,EU

His first?


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