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

Registered: 02/27/13
Posts: 6
Loc: 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]
Scott Hamlin Offline
500 Post Club Member

Registered: 08/11/12
Posts: 695
Bummer - Have you tried plugging it
into different outlets in the house?

Also, does it have an external power supply?
_________________________
Personal Site: http://DulceLabs.com
Casio PX-5S Facebook Group: https://www.facebook.com/groups/Casio.Px5s/

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#2050973 - 03/19/13 04:35 PM Re: Kawai CN34 "hum" [Re: Ian Lash]
MacMacMac Offline
4000 Post Club Member

Registered: 09/24/09
Posts: 4242
Loc: North Carolina
Send it back. Defective new merchandise should not be tolerated.

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

Registered: 02/13/13
Posts: 3
Loc: 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]
Ian Lash Offline
Junior Member

Registered: 02/27/13
Posts: 6
Loc: 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

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

Registered: 09/06/07
Posts: 10739
Loc: 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.

"Richard, none of us could forget you have a CLP-990." - EssBrace, 2014

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#2051750 - 03/21/13 05:48 AM Re: Kawai CN34 "hum" [Re: Kawai James]
pv88 Offline
3000 Post Club Member

Registered: 08/31/10
Posts: 3080
Originally Posted By: Kawai James

Kind regarsd,
James
x


James,

Did I catch a typo, above? grin

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

Registered: 09/19/10
Posts: 424
Loc: Hun,EU

His first?

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