Question about Kurzweil SP4-7 76 Note Digital Stage Piano, Semi Weighted Keys, 128 Programs, 64 Split Polyphony, Split Layer, Setup Mode, 24 Bit DSP Technology, Black

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My kurzweil pro 3i digital piano takes time to start, some times souds like clicking

When i turn it on sound doesnt come and on display write loading which some times never finished ! most of the times starts to produce a sound like klicking and doesnt stop ! i neeed to turn it off

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Posted on Jan 02, 2017

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SOURCE: I have a Kurzweil Mark-Pro

I don't know what you "tested" the power supply board with, but I would use an oscilloscope to look at the outputs to see if any of the regulators are drooping. Clicking is a broad term... if it is a relay, it PROBABLY is for speaker protection and senses balance of the power amps.
With a two minute delay, this is PROBABLY a thermal issue... Use freeze mist/circuit cooler to find suspicious parts.

Posted on Jan 02, 2011

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SOURCE: Kurzweil Sp2x

It may be the line current at those venues.

If you have a lightweight switchmode supply, you can try adding some ferrites to the power cord from the wall. but you almost need to switch to an older style heavy transformer supply for reliablity. It is my guess there is a great deal of noise on the supply current at those vehues you have had problems at. That noise does not play well with switchmode.

Posted on Feb 05, 2012

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SOURCE: kurzweil eg 20 piano keys sinking

You may not have the patience level to attack it. Few ppeople do.

Posted on Sep 25, 2012

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If you have a lightweight switchmode supply, you can try adding some ferrites to the power cord from the wall. but you almost need to switch to an older style heavy transformer supply for reliablity. It is my guess there is a great deal of noise on the supply current at those vehues you have had problems at. That noise does not play well with switchmode.

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