20 Most Recent Casio 76 Key Smartmedia Keyboard - Page 5 Questions & Answers

The manual describes all procedures: http://support.casio.com/pdf/008/PX410R_e.pdf

From CASIO, duhhh ?

Is your polarity correct ???

I found this! https://www.manualslib.com/manual/268824/Casio-Ctk-573.html

You can't add songs to the LK-30 song bank. I suspect you would need to take apart the keyboard and replace the ROM (read-only memory) chip to get a different song collection. Most Casio electronic instrument manuals are available from http://support.casio.com/en/manual/manual.php?cid=008 . However, I found the LK-30 manual at manualslib.com: https://www.manualslib.com/manual/358460/Casio-Lk-30.html . I wish that I had better news for you. Cindy Wells

What model? Diodes are either burned up (but you would see the ends still present) or missing because they aren't applicable to that model. It's more likely the rubber pads under the keys need to be replaced

To rule out the power supply, or the related power supply circuitry - try it with batteries. If the problem goes away, you can try another 9v power supply with the same ma current (or higher) just make sure it is the correct polarity.

You can find that here free download https://www.manualslib.com/products/Casio-Ctk-519-692441.html

I assume you mean through its own speakers. (If you are running through an amp, make sure everything is powered from the same power point) If the hum is coming from the unit but not through the speakers, you have a more serious problem. If you are not using the supplied power adapter that could be the problem. If you are using the mic input, the mic lead could be the problem, or it might be passing close to the power adapter or some other hum source. try a different lead, and make sure the lead is well away from everything. Some other device might be too close. Try moving things around, or a new location.

http://www.ebay.com/itm/DC-9V-AC-Adapter-Casio-CTK-4000-CTK-558-CTK700-Keyboard-/221021599357

Unplug while unit is on. Then press and hold power button for about a minute. Replug back in see if that does trick. If not call company for a hidden code if available.

http://protrek.casio.com/resource/manuals/module_3246.pdf At the top of page 3 is instructions to change the time. Notice in the diagram there is a step in which you have the choice to turn off the tone. Try that. Secondly, try entering alarm mode, as described at the top of page 2. I suspect you have some alarm set. Remove it if you find it there. Note that you only have a couple of minutes in which to make the alteration before the watch automatically kicks you out of the alarm mode.

No, your casio needs a 9 vt. if you look at the power connector on your casio, it should specify the power andpolaritty required.

look for it on google

Make sure it is compatible. Match the voltage and amperage on the keyboard with the power cord's specs. If you don't, you may damage the keyboard.

Here it is: CASIO CPS101 Owner Manual

It's doubtful it's a problem that a reset would help. It sounds more like a problem with the contact on that specific key. I suggest taking it to the repair shop.

Suggest you power with batteries and try the keyboard. If no problem it is likely the power adapter has a problem, or loose connection. I've included the manual to help you discover the problem and resolve, Hope this helps? http://support.casio.com/storage/en/manual/pdf/EN/008/CTK451_EN.pdf

EBay has the Song Book for the LK 43/44 (which may be the same) so it's worth checking there from time to time. http://www.ebay.co.uk/itm/CASIO-Song-Book-LK43-44-score-2-/361904464219?hash=item54432fe15b:g:R3oAAOSwfVpYowZU