I have a Technics KN 1000 Keybord that has a middle C sound control problem. How can I fix it?

Question edited for a lot more clarity.
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Owner Manual and Service Manual

Technics SX-KN6000 Owner's Manual

ManualsLib https://www.manualslib.com > ... > SX-KN6000
View and Download Technics SX-KN6000 owner's manual online. SX-KN6000 synthesizer pdf manual download.

Service Manual

pg.gda.pl http://bee.mif.pg.gda.pl > #pro_audio > Technics PDF SX-KN6000. Symptoms which appear to be signs of trouble. The following changes in performance may occur in the Technics Keyboard but do not indicate trouble ...
89 pages
To do a Hard Reset: Turn off keyboard and wait 10 seconds. Hold down button for Latin, World, and Custom and switch on.
Dec 13, 2003

help with kn6000 ' Technics Discussion ' Synth Zone Forums

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SX-KN6000 - Technics Keyboards

technicskeyboards.com http://technicskeyboards.com > files > TECHNI... PDF RESET. SOUND CONTROLLER. MODE. Add vibrato. CI. While pressing a key on the keyboard, move the MODULATION wheel up to add the effect ...
187 pages

Try these first:

https://www.justanswer.com/electronic-musical-instruments/axjnq-technics-sx-pr53-piano-sustain-pedal-will-sporadically-stop.html

http://www.mikebarden.com/technics-electronic-digital-kn-pr-px-piano-keyboard-ensemble-repairs/technics-spares-spare-parts/

https://ourpastimes.com/how-to-repair-a-technics-piano-12377949.html

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technics, technic, tecnic, digital piano repair, service, servicing, digital, electronic, ... pr200, pr250, pr270, pr3, pr300, pr303, pr305, pr307, pr350, pr370, pr40, pr5, pr50, ... It needs extremely specialised repair work which must only be carried out by .... nodisplay, LEDS don't light up (except for the one on the front of the piano ...

Sorry.
There was an interface included, inside the KN 1000 unit floppy disk drive. This interface change "the 34 pin out from the floppy disk)" to "the 24 pin out" that could be connect to the the KN 1000 "24 pin in" conector jack in the KN 1000 main board.

As we know, the common disk drive unit in the market have 34 pin out only. wa can't connect directly 34 pin out floppy disk drive to the 24 pin in jack connector inside the KN 100o main board.

We need such an interface. This is the problem coz no one sell this interface separately in the market.

If u have one KN 1000 floppy disk drive unit (SY-FD), u can pick out that interface from inside the unit, and use it as a gate/interface from your new floppy disk drive to the "24 pin in" connector inside KN 1000 main board.

U can search this 24 pin out diagram interface in the net, but the problem is no one sell it separately.

i need to replace screen display of my KN 2000 Technics K board with a new one because it has become unclear have a lot of lines appear where can i find ,plz help me to replace.

Hook the speakers to the remote terminals on the back and switch the front speaker control to select the remote speakers. If you have audio, your main amp channel may have an issue....

U need an interface, if u want to use the "34 pin out" from floppy disk unit, to the "24 pin in" connector jack, inside KN 1000 main board.
U can get this interface unit bboard from "the KN 1000 floppy disk drive unit".
Just open this unit SY-FD20, and pick out that interface board from this unit,
Then use it as interface to connect your new 34 pin out floppy disk drive to connecting to the 24 pin in connector jack inside the KN 1000 mainboard.

can't find Technics kn 1200.
help me please. Price is not interest.
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speaker maybe busted tyr to change it.. or test it first before changing