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RE: Casio wk 3000 musical Keyboard only reads Ples Wait

When I turn on the keyboard, the only thing I get in the window is "Ples wait" I have waited for hours on end and the intrument won't "boot up" I've turned it off, unpluged it and try later and nothing happens.


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  • thomd Jul 10, 2008

    When powering up only shows pls wait, then display stays lit. with no other display. keyboard will only play if dsp button is shut off but no display on screen. Is there a reset or is this internal problem. reference casio wk3000

  • Anonymous Feb 26, 2009

    You turn on the keyboard and get Pls Wait... It sits there for a while and does nothing. No sound... Nothing


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I am not shure but it sound like a hard drive problem, does it have a hard dribe that keep's it's memmory.



Posted on Feb 08, 2008

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I have a behringer 2500. both channels are distorted but not out. what would need to be replaced.

It seems to me that you have a bad transistor, T14 or T13 to be precise. T14 most certainly is in short circuit or its companion T13 (T14 is a small signal NPN transistor whereas T13 is a small signal PNP transistor). I just fixed one with the same symptoms as yours. You should be able to measure T14 collector voltage against ground (metal chassis) and the reading must be very close to +15VDC. Also, measure T14 emitter voltage to ground and the reading must be very close to -15VDC. If any of those voltages is compromised, you will not be powering the amplifier's operational amplifiers (U4, U5, U6) right. Check T14 and T13 with your multimeter and replace them as needed. Also, keep in mind that after replacing any of those transistors you will be required to readjust the BIAS current for your amplifier's drivers, which by the way, is a very easy task to accomplish. You know your BIAS current is misadjusted when your output transistors get really hot even under no signal conditions or when your amplifier distorts at very low volume levels or on high frequencies amplifying. To adjust the BIAS current for channel 1's driver transistors, wait until the amplifier has cooled down, locate and adjust VR3 until you read 80 mV across R2. To adjust BIAS current for channel 2's driver transistors, locate VR6 and adjust it until you read 80mV across R106. You need to wait until the amplifier cools down to set BIAS current right, If the output transistors' heat sinks get hot before reaching proper BIAS current adjustments, wait until they cool down to average room temperature and retake BIAS current adjustment. Once both channels BIAS currents have been readjusted, apply a thin coat of thick nail polish to the sides of VR3 and VR6 to keep vibration from misadjusting BIAS currents again... T14 goes down under severe BIAS currents shifting and it just makes me wonder as to why BEHRINGER does not apply a setting substance to VR3 and VR6 so they do not shift under sever vibration conditions, after all, almost any major amplifier manufacturer in the world does it. Good luck!

Nov 10, 2012 | Behringer EUROPOWER EP2500 Amplifier

1 Answer

SU-G86PP-K Technics Amp speakers just quit works good, sounds good, and then goes quiet sometimes wait 5 - 10 minutes and they come back on other times, wait till next day ??????

Check for wire shorts as this changes the impedance and will over heat the thermal cutoff. Too long of wires or too small diameter can do this. If no joy with this, suspect bad speaker or blown amp...

Nov 28, 2010 | Technics Amplifiers & Preamps

1 Answer

I have a SONY amplifier, TA-F410R. When I turn it on I hear nothing. Only after I boost te volume (generally per speaker) does the amplifier burst open. If I choose not to pump up the volume, I can also...

My 1st thought would be the main power supply capacitors.
If they are dried out or "leaky" they WILL take a long time b4 the power supply gets up to where it will run the amp
Get the main capacitors replaced

Nov 02, 2010 | Sony Amplifiers & Preamps

1 Answer

My Casio WK-3000 works perfectly except I have a dead octave (8 notes) on the keyboard. I've initialized the system but the 8 notes remain dead.

You will have to have someone open up the keyboard and check that the flex-cables from the keys are all connected to the main circuit board

Aug 16, 2010 | Amplifiers & Preamps

1 Answer

Power transistor number

Hi again! Been thinking about this and you might not need to wait for someone to answer. I assume the transistor in question has blown apart or burnt up so you can't read the number?
However does it come off the heatsink as part of the main amp? If it does then it might have a brother around it. For if it is say the left or right channel transistor, then the other channel will have the same type transistor. Remember the left and right channels are copies of one another. If you see 4 transistors on the heat sink then it's a push-pull amp. They work in pairs, one pair for each channel. By the way it's best to replace the pair, even if only one is blown.
If on the other hand the blown transistor is from the power supply section, then you will have to wait for someone to help, or get the service manual.

Jan 24, 2010 | Amplifiers & Preamps

1 Answer

No audio output


Check it with headphones and mess around with the volume control.
If it has items you can "edit" someone may have turned down the digital volume control in the user edits.

Mar 23, 2009 | Amplifiers & Preamps

1 Answer

Keys on Casio keyboard are inoperative

Just wanted to "chime" in. I just recieved a Casio keyboard from a customer with this same problem to work on. I initially found 4 corroded solder joints. Repaired them, same problem. Ginocumbe's description leans me towards capacitors. Will let you know what I find or even if I cant figure it out. Though 2 years ago, you probably added your synth to the land fill.

Nov 30, 2008 | Amplifiers & Preamps

2 Answers

Legend By ESTEY organ

This happens when organ sits in none use state for long periods. My Legend was in storage from 2001 to 2004 and I had to call the Estey company to get "reset" instructions. I wrote them down as...."TO RESET---PRESS TRUMPET/TROMBONE BUTTON---TURN OFF---TURN ON---WAIT FOR "HARDWARE RESET" DISPLAY.
Hope this works for you.


Jan 05, 2008 | Amplifiers & Preamps

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