Question about Kurzweil SP3X 88-Key Stage Piano

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After transport the keyboard,half of the keyboard below c4 not work.

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Probably a cable has come loose inside the unit. The keys are scanned by the internal processor as a matrix of two contacts per key. Often the keyboard is divided into two sections.
You will need to have it repaired or if you are electronically adept, open the case and look for obvious problem.

Posted on Mar 18, 2011

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It's about hardwares.
If dead keys are the same notes(C2-C3-C4 or E2-E3-E5 etc),its electronic parts problem.
If dead keys are random(D1-F1-G3-B5 etc),chances are :
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Hi As recently as a month ago I bought a Kurzweil PC3K8 from sound solutions. On 13/08/2011 I took the keyboard (in a flight case) to a gig. After setting up the keyboard and powering on, the blue light...


Hopefully you didn't take it on a flight as sometimes they use bomb detecting equipment that subjects cargo to either high levels of radiation or high electro-magnetic fields. This can damage the equipment. It sounds like the processor is not running. There usually is a screen contrast control that can be turned enough that the screen appears blank, but usually you can get a sound out of the unit without reading the screen, Look in your user manual for a FACTORY reset or restore and pperform that procedure. If that doesn't work, then repair is in order. If unit has been vibraated during transportation, it is possible a cable has come off inside. Since you just bought this, EXERCISE you warranty immediately.

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Some keys rubber not work


Check the rubber contact pads below and swap with working ones for a test. replace if necessary. If the faulty ones are in a patten, replace MKS board attached below the keys unit. some old models d require CPU replacement. Whats your model?

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Right half of lcd screen on yamaha DGX-620 screen is blank


I have the same Problem since yesterday my granddoughter hit the keyboard too heavy. I have opened it (many screws...) but could not find any obvious reason. Nothing like a loose connector.

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if this is the case, it culd be one or more of many things.

the most likely, is that the screen is cracked. this may be an "internal fracture" and will not be visible (you wont see cracks).

another, however, more unlikely reason is that the ribbon cable is partly detached. if this is so, you could get inside the keyboard your self (which WILL void your warranty).
this is rather difficult, and there is a high risk of damaging other aspects of the keyboard in the proses.

if it is still under warrenty, call up yamaha tech support and see if they are able to do anything for you.
if you are no longer under warranty, or would rather pay: find a local music (or electronics) store, and have them look at it.

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At the back there are 2 screws between the upper and the lower part and under the lower keyboard 2 screws also. Remove the screws and disconnect the headphonejacks under the lower keyboard, also the pedalconnection plug. Now you can lift the whole upper part from the lower part (preferable with 2 persons). The best way to transport this upper part is to put it in a sleepingback (just fits!).
Kind regards,
wboerdijk@hotmail.com

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