casio ctk671 has a strange fault

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morris2012

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I'm wondering if anyone has a similar problem to mine.
My casio ctk671 has developed a fault.
The keys e f g a b (left hand) just don't work at all. This is on a simple 000 piano setting with no fancy stuff.

I would be grateful for any feedback.
Thanks
 
Do they work on other sound patches? Do the sharp/flat keys work between these keys?
 
A possible cause is someone having spilt coffee or something on the keys, and it has messed up the contact pads for those notes, but that's just a guess.

I've had a similar experience with a Roland keyboard. In that case, I was able to take it apart, get to the pads and clean them. It worked again after that.
 
The black keys f g an e sharps also don't work.
I don't recall spilling anything.
I was hoping there was some kind of re-set function.
 
morris2012 said:
The black keys f g an e sharps also don't work.
I don't recall spilling anything.
I was hoping there was some kind of re-set function.
Click to expand...

Do you have kids?

When contacts go, it is either just failure or contamination that caused the failure. Not likely ever a software 'reset' issue. It just bad for some reason.

For the price of the unit, you will be best off trying to service yourself, or buy a new one or something better. Unless it under warranty. :)
 
Yes we have kids but they are older and keen to learn the keyboard.
I'de rather fix it if I can but not sure how to clean/fix the contacts. Does anyone know a method?
I'm very happy to give it a try. If I break it any further -since it's broken anyway- it doesn't matter.
 
Can you borrow another MIDI keyboard? Plugging that MIDI out to the Casio's MIDI in should rule the key contacts in or out.

Do those notes play out of a computer, either USB'ed or DIN'ed? If you don't have suitable software dld Modartt Pianoteq.

Dave.
 
I haven't been inside a Casio. Only a Roland.

You should be able to download a service manual which will show you how to get inside it.

Cleaning contacts means opening it up and disassembling it to the point where the contacts are visible (usually rubber strips with embedded contacts). These stay fixed with little rubber plugs, and can be lifted off and cleaned with, preferably, isopropyl alcohol.

However, the problem may be perversely either better or worse than this. Contacts from the keys are often bundled in sets of eight, which then plug into another part of the circuitry with a cable and plug. The problem may be as simple as one of these plugs becoming loose and falling out. If this isn't the case, then identifying why a bank of eight doesn't work is a major headache.
 
I'll have a look at the manual regarding a possible keyboard split (thanks arcaxis) . Having thought about it as much as I would like to take it apart, I get the funny feeling I will make the problem worse rather than better.
If the keyboard split is the problem then I'll post instructions on how to fix it here to help anyone else.
If I don't get back to this thread It means I took the keyboard to my local recycling centre.
Thanks for all your suggestions.
 
morris2012 said:
I'll have a look at the manual regarding a possible keyboard split (thanks arcaxis) . Having thought about it as much as I would like to take it apart, I get the funny feeling I will make the problem worse rather than better.
If the keyboard split is the problem then I'll post instructions on how to fix it here to help anyone else.
If I don't get back to this thread It means I took the keyboard to my local recycling centre.
Thanks for all your suggestions.
Click to expand...

No! Don't dump it! Unless you are REALLY stuck for room. Even if the keyboard IS fooked you should, as I said, be able to play the unit from a PC or from a "dumb" keyboard with a DIN cable.

"61 Full Size Keys
32- Note Polyphonic
Touch Sensitive (with on/off switch)
Sounds/Effects

348 Tones: 128 General MIDI, 100 face panel sounds, 100 variations, 10 user-programmable sounds, 10 drum sets
Brand new Sound Generator and DSP based on the MZ-2000 for unbelievably high quality sounds
Synthesizer function lets you create and store your own sounds
DSP with Reverb, Chorus and many other effects (4 effects simultaneously)
Split & Layer Function
Rhythms

100 Rhythm Patterns
CASIO/FINGERED CHORD auto-accompaniment system.
Other Features

Advanced Tone function: gives a variation on the basic tone with added effects.
Internet Data Expansion: allows you to download new sounds, patterns, songs and keyboard settings over MIDI from Casio website.
Backlit LCD Window displays selections and status of Tone, Rhythm, Mixer and keyboard functions and Tempo
On-screen Keyboard and music staff icons display notes and chords played and metronome icon indicates the beat
Mixer function allows control over each MIDI channel and accompaniment part
3-song/ 6 track Memory, Real Time or Editable Step Time
Sustain Pedal Jack
16 Registration Memory and 104 One-Touch Presets
MIDI IN/OUT jacks;16-part multi-timbral (GM level 1 compatible)
2 Built-in speakers; Stereo Lineout/headphone Jack; 2.5W + 2.5W Bass-Reflex Audio System
Operates on D batteries or optional AD-5 AC Adapter"

You then get to keep all that ^

Dave.
 
The keyboard split would reset if you power down the unit (take the batteries out, too, if there are any in it). That's the way the Casio's are, they don't retain any layering/split memory without the D(?) batteries in it, or the power supply plugged in. Not to say that somehow the split can be 'frozen', but probably not likely. I think geckos idea that one 'batch of 8' contacts/wires has come loose.
 
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