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Hi all, I recently picked up an M12 that has tuning probems. All 12 voices fail tuning. I've tried UNTUNE and re-tuning, as well as resetting the software (hold CLEAR on power-up and then YES) to no

Hi Karl, Thanks for the advice, I'll probably open her up someday next week and see if there's any damage or anything out of place. Don't suppose you know where i could find a schematic for the PSU

Hi, ? Well, you might get lucky with replacing a fuse, but more than likely the PSU is failing. Best bet on a power supply fail is the capacitors, as they are 20+ years old. Having said that, The

I was wondering if anyone could shed some light here? recently (within the last month or so ) my M12 has been flicking itself on and off for very short periods of time, thought it was a bit strange

Hi Chase, Glad everything is okay. And thanks for posting back about the fix. Class act, you are! I will add this to my fail log, in case the same kind of symptoms show up again. (I don't keep track

You are very lucky that you didnt burn anything ! Thats why you should use a DI ! WT

I'm sorry, but I made a really stupid mistake here. When I was working on the song, I ran out of channels on my mixer so I plugged into where I would usually have my pc stereo out (channels 23 and

? Hi Chase, ? ? Ahhh, a good clue, Is the mixer / CV generator plugged into the same power outlet as the Xpander. You could have a ground loop problem. Other possibilities: The mixer could have a

Thanks a lot for helping me out here, I really appreciate it. I opened it up and press on all the socketed ICs and reseated the connecting cables. After I did this I was able to get it to tune all

Hi Chase, ? Sounds like the?final VCA is stuck open.? For all voices if in mono keybooard mode. You may have tried this, but ? What happens when you change patches? Same issue? Is the Xpander

I powered down my xpander and it was working perfectly (pass every tuning all the time after I recapped the ps years ago). I turn it on a few minutes ago and it behaves like there is a note stuck.

Well, this is something I asked myself like 3 years ago when a Matrix-12 showed up for sale locally. Got in contact with a great musician, who said: "Used to own the Xpander, but got the M12 and have

Hi Terje, Good idea, you also might swing out the displays ( board is hinged ) and clean the glass of the VFD's as well as the front panel bezel. It can really spiff it up.

Hi all, and thanks for all the input regarding the Matrix-12 repair that I am doing. The unit is in very good shape and sounds good. Among other things all the displays are fine, panel is good, wooden

If anyone is looking for a spare/replacement VFD display for their Xpander, there is one (possibly more) on eBay at the moment, ex-Japan (but see below). The price of about USD145 is not exactly

Hi Terje, ? Sounds like he has one voice turned off. ? Push these buttons to access this: Master Page> Page 2 >? Voices On/Off ? Each voice can be turned on or off here. Odds are good, that the

Hi all, I am well into the service of the Matrix-12. Surprisingly, there are a lot of things that works, even though it all seems a bit worn. I am slowly learning to program this giant, so that I

Hi Mel, I have always?used water/w a soft cloth. ? Results look like this: http://www.flickr.com/photos/29513543@N04/2759714802/ Karl Schmeer ? ? ?

I would like to know this too as my Xpander has the same problem. WT

A specific name would be helpful. There are many chemical sprays for cleaning computers, some of which would probably dissolve the Xpander's Front panel