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Thanks! I swapped the chips around a bit, and now all keys work. It could well be the wiggling caused by me taking the chips in and out several times that caused this, because no new chips have been

About your keys problem, you may try to swap U63 and U75 on the processor board. The problem may be on the input line of one 4512 chip which may be destroyed. After the swap, check if the problem

VCOs are 8430, and VCF/VCAs are 8534. Terje

Hi, Thanks for the feedback. Good idea to compare with the Xpander service manual, as it is all there. I have been though all the procedures now. Yes, 2.2uF caps with 50VDC rating. Checked all the

Hi, what rev 3374s and 3372s are in the failing board? Doug synthparts.com

Hi Terje, Wow Two M12's :-) The version of the M12 service manual I have " Bought from Factory long ago"?is pretty thin on details. It's just schematics and a few engineering change orders. If you

Hi all, Thanks a lot for all the help I have been given on this list. I have changed parts in the power supply, some CEM chips, all those el.caps who blocked tuning and sound, swapped some 74 series

Thank you. So it us difficult to make some prediction for a brand new unit ;-) Envoyé de mon iPhone

I feel so dumb asking this question, but...I can't get my Matrix 12 to respond to MIDI input. I bought this synth recently and it's by no means the first. The MIDI output works fine. I've set up the

Upon power up all 3 screens should light up after a couple seconds displaying whatever the last state was before powering down. In other words, wherever you left off. Howie

Hello, A need a few answers : - What are the first informations displayed by the xpander on startup ? - On which display(s) ? - Immediately ? - after a few seconds ? Thank you ! Kris

can you share the process please ?

Hi Doug, My Matrix-12 is actually missing just one of those rubber feet. Can I buy one from you? Hope all is well, Howie ________________________________ To: xpantastic@... Sent: Sunday,

Hi Karl, Thanks a lot - just what I needed! Unfortunately the company based in Florida (?) didn?t sell to Europe, but through their site I was able to find the original manufacturer, and sourced a

I have a few of the original rubber feet. Doug synthparts.com

Hi Terje, A couple?of my M12's feet fell off and I did not worry about it cause I had it on a stand. But I placed it on a table for awhile and it did not take long before?crazy stuff started

Hi all, Thanks a lot for all the input on this list. I have repaired a Matrix-12 some time ago, but not everything is tip-top, so I am doing a second round of service on it. Once again I am looking

Great job you?ve done here. It looks really good. Den 25. mai. 2012 kl. 00.33 skrev obermann12: Terje Winther terje.winther@... http://www.wintherstormer.no/

+1

Awesomesauce is indeed how it looks. Thanks very much for posting this! Mercifully my Xpander is not peeling (touch wood), but I'd still be interested in hearing more details of how you got such a