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KN 1400 Yellowing Keys!

Hi everyone.Hope this is the right place for my following query regarding my KN1400. It seem a common fault with this model is the gradual discoloring (yellowing) of the white keys even though the instrument has never been left exposed to direct sunlight…

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KN 1400 Yellowing Keys!

paulymartin

paulymartin
United Kingdom

Total Posts: 3
Joined: August 22, 2015

Hi everyone.Hope this is the right place for my following query regarding my KN1400.
It seem a common fault with this model is the gradual discoloring (yellowing) of the white keys even though the instrument has never been left exposed to direct sunlight
and the keyboard is always left covered.Apart from replacing all the white keys,does anyone out there in 'Technics keyboard land' know of any method that might be safely used to clean or restore the white keys?
Thanks in advance...…...great site......been a member for a few years now!
Paul Martin

Tags: KN1400 Query
Posted on January 22, 2019 at 11:04 AM
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1 Reply

jd5live

jd5live
United Kingdom

Total Posts: 360
Joined: June 8, 2014

Re: KN 1400 Yellowing Keys!

Hi Paul, This is a problem that has come up on many a forum not only with Technics models The main instruments that suffer from this problem are in what the trade call the baby models ranges which were often lower specification/price. This includes your KN1400, Technics used ABS plastic which discolours with age and also tends to make the joint at the back of the key brittle. so any form of removal comes with a high risk of damage. These keys are NO longer obtainable as far as we have been told. they come in sets so one broken key means you replace an octave!!!!. To remove these key sets is awkward and very easy to damage the key set . There has been a number of articles on You Tube I have tried using the Hydrogen Peroxide as recommended but I MUST SAY I do not know if the process is a long term fix and if it makes the keys more brittle. The normal way to polish the minor scratches out of a key is to use a metal polish but this does not seem to remove the yellowing I have tried.without success on KN1400 keys but it does work on KN5/6/7000 models, but takes a lot of time.
Regards John.

Posted on January 22, 2019 at 6:11 PM