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Korg CX-3 stopped working


MrVegas

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I bought a CX-3 about 10 years ago and it worked great for years, the only issue I had was sometimes the distortion volume pot would get scratchy.

 

I had not used it for a little over a year and it was stored in a nice heavy case but it was subject to hot and cold conditions inside.

 

I brought it to my church a few weeks ago to accompany the worship band and it just didn't work. No sound at all. It powered up, but that's it. I am wondering if it makes sense to take it to a repair place (a long drive from where I live) or if it is likely to be toast. I took the top off but could not see anything that looked like a loose wire. Seeking recommendations.

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Kronos 88, Korg CX-3, Motion Sound KBR-3D

 

 

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Seeking recommendations.

 

Based on the information provided, there's no real way that anyone can tell you anything definitive. Take it to a qualified repair tech for a proper diagnosis, or be content to not know what's actually wrong with it.

 

Given your diagnosis to this point, I'd suggest you don't try to buy a service manual on eBay repair it yourself. ;)

 

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MrVegas, The CX-3 was notorious for having issues with corrosion between its ribbon cables and the circuit boards they're connected to. Before you haul it off to a repair shop, take the top off and carefully disconnect and reconnect each ribbon cable one at a time.

Live: Roland Jupiter-80; Yamaha S70XS (#1); Mackie 1202VLZ4, IEMs or Traynor K4

Home: Hammond SK Pro 73; Yamaha S70XS (#2); Wurlitzer 200A

Quik-Lok X stands!!!

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MrVegas, The CX-3 was notorious for having issues with corrosion between its ribbon cables and the circuit boards they're connected to. Before you haul it off to a repair shop, take the top off and carefully disconnect and reconnect each ribbon cable one at a time.

 

Great info! I will give it a try.

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Kronos 88, Korg CX-3, Motion Sound KBR-3D

 

 

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I had the same problem with my CX-3 years ago (that's what brought me to this forum in the first place, thanks to Eric).

 

There are some factory resets Korg Canada's service dept in Montreal got me to try, and they worked intermittently but after a few bootups the problem came back. Turned out to be the motherboard, which was replaced and never caused a problem again.

 

 

____________________________________
Rod

victoria bc

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I had the same problem with my CX-3 years ago (that's what brought me to this forum in the first place, thanks to Eric).

 

There are some factory resets Korg Canada's service dept in Montreal got me to try, and they worked intermittently but after a few bootups the problem came back. Turned out to be the motherboard, which was replaced and never caused a problem again.

 

 

Do you remember the approximate cost of the motherboard?

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Kronos 88, Korg CX-3, Motion Sound KBR-3D

 

 

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MrV-

 

I have a service manual on CD. Since you live close you could bring it over and we could take a look to see if it's something simple.

 

Coincidentally I just put mine up on ebay yesterday. If it does need a motherboard this might be another option.

 

That's very nice of you to offer. I might take you up on the offer to bring it by, but since I am so busy right now at work (I am a CPA), I would like to try to unplug and replug the ribbon cables method first. Do you know if you can see/access the various cables by just removing the top, or do you have to fiddle around more inside once the top is off?

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Kronos 88, Korg CX-3, Motion Sound KBR-3D

 

 

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Hmm..Its been 8-9 years since I opened up one of these. As I recall getting to the keybed (which I replaced) you have to remove a bunch of stuff but I cant remember where the mother board sits. I just opened up the disk and unfortunately it only has the schematics and part list. In the TOC it lists "structual .....not yet". Sorry about that.
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I had the same problem with my CX-3 years ago (that's what brought me to this forum in the first place, thanks to Eric).

 

There are some factory resets Korg Canada's service dept in Montreal got me to try, and they worked intermittently but after a few bootups the problem came back. Turned out to be the motherboard, which was replaced and never caused a problem again.

 

 

 

 

Do you remember the approximate cost of the motherboard?

 

The CX-3 had been off warranty for about 6 months at the time of replacement, but due to the fact I had been working with Korg on the problem during the warranty period, they decided to replace it for free. I had to pay shipping to and from Montreal.

 

 

____________________________________
Rod

victoria bc

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Well crap- I decided to unpack the carton and give my CX-3 a final whirl yesterday and it's not working either. It drones on with a really distorted sound with the drawbar1 selected. Drawbar 2 seems OK for a while and then all the keys stop working except for 1 of them. When I press that key I get the drone noise again. Took it apart and yes the motherboard is a bit of a pain to get to but not too bad; you have to remove a number of other modules first including the drawbar assembly. Disconnected and reseated all the ribbon type and Molex connectors. No luck. Ran the diagnostic (power up with the 4 and 6 buttons held) and it shows I have a ROM error. Reloaded V2 OS (can't believe 64 bit Windows 7 had no problem with this 2003 program. All loaded successfully but still no joy. Pretty sure I need a new motherboard as well. Depending on the cost this organ may make the scrap heap for parts.
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I had an issue with my cx3(2002 version). It had a lot of distorted sounds in the lower registered. I had it looked at and needed a new mother board. It also had the ROM error. If I recall, it was about a 600 dollar repair. I can look for the receipt tonight and let you know the exact cost.
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If I recall, it was about a 600 dollar repair. I can look for the receipt tonight and let you know the exact cost.

 

I'd appreciate that. If the board itself is available and around 2 bills I'll go for it. Easy enough to swap in for the old one. Otherwise I start thinking about using it towards some Frankenstein controller. Thanks Stale.

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Well that blows. Now I need to decide what to do for a replacement. Cant really afford a new clone and dont know what to get... Hammond vs ???

 

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Kronos 88, Korg CX-3, Motion Sound KBR-3D

 

 

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  • 7 months later...
Ouch, I got 2 quotes today for the part only - $590 and $670. Now I know why they call it a Mother Board. Pass.

 

ugh that is disheartening. Mine has the same problem of turning on and just not producing any sound.

 

Costs THAT much for a new motherboard to be installed? (Add on top of that the 2 hour drive to the repair place).

 

With the Kronos, I'm really torn on whether to repair it or not.

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I have no money in the organ, so 500-600 is ok but I would

Have to be sure that would take care of it. With my luck

It will need more than just a mainboard. I did contact Korg via email

Waiting for a response, have a call into a local authorized

Repair center. I just really lock the tone and the feel of this

Thing. Also if it powers up I can map it to VB3. Thanks for the

Replies... I am new to the forums

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Any details from the repair ticket? i.e. Mainboard replaced, ROM chips...i am assuming/hoping/praying that the ROM processor and subprocessor are on that same board

I have a the schematics for this-has test reset combinations...anyone can have it...if there is a way to private message your email etc. i'll send it... i found it on the web once then had trouble finding it again

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