Casio AP-620 Celviano Digital Piano Logo

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Preethi Posted on Sep 09, 2013

My Casio AP 620 Celviano says "Loading" soon as I switch it on but is not working

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Sam Walker

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  • Contributor 73 Answers
  • Posted on Nov 26, 2013
Sam Walker
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Joined: Dec 06, 2011
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Could possibly power supply problem. If you're running through a multi-board, try running directly into the outlet. Failing that, try another power outlet altogether.
The Celviano range aren't real power hoggers once going, but initialising and starting up takes a bit of omph.

2 Related Answers

Anonymous

  • 1 Answer
  • Posted on Mar 08, 2011

SOURCE: Our Casio Celviano AP-620 won't

My AP-620 has a pedal problem too... it sticks and I keep hearing the music I play ring out after the pedal is relaesed

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Fred Yearian

  • 5603 Answers
  • Posted on Aug 14, 2011

SOURCE: ok i was playnig on

What has happened is that one signal wire of the matrix that scans the keyboard has opened up. Each key has two contacts. One closes before the other and that is how they measure key velocity to control the loudness for piano sounds for example. When one contact doesn't work, often the sound is set to MAXIMUM key velocity resulting in MAX loudness. The key contacts are scanned digitally in groups of usually 8 or 12 and, for instance, every C key has a single line attached and then every group of 8 or 12 has a second line and then there are two complete sets of these to implement the velocity sensing. Your unit probably has either a break in a cable or possibly a cable connector that has failed or not seated OR worst case, the circuit board under the keys has a crack breaking one wire or circuit trace going to that section of the keys. The problem will require opening the keyboard to repair. If you are not electronically adept, besst to take this to a repair shop.

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Ok i was playnig on my celviano ap-620 and then 8 of the keys started to sound rare, very loud, it seems like it lost the key touch sensivility on those keys from the center (C) and 8 keys down i tried...

What has happened is that one signal wire of the matrix that scans the keyboard has opened up. Each key has two contacts. One closes before the other and that is how they measure key velocity to control the loudness for piano sounds for example. When one contact doesn't work, often the sound is set to MAXIMUM key velocity resulting in MAX loudness. The key contacts are scanned digitally in groups of usually 8 or 12 and, for instance, every C key has a single line attached and then every group of 8 or 12 has a second line and then there are two complete sets of these to implement the velocity sensing. Your unit probably has either a break in a cable or possibly a cable connector that has failed or not seated OR worst case, the circuit board under the keys has a crack breaking one wire or circuit trace going to that section of the keys. The problem will require opening the keyboard to repair. If you are not electronically adept, besst to take this to a repair shop.
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