开云体育

Try with only the other board. Envoyé de mon iPhone

The Matrix-12 is smarter than us: I tried to start with only one voice card connected, but was given an error message, and no sound comes out. Terje Den 10. juli. 2012 kl. 13.53 skrev Omar Torres:

so then to me it sounds like you might just have a bad strap?? :) try swapping the straps as well... -omar --- sent from iPhone

Good idea !

im not convinced yet you have a bad voiceboard can the Matrix-12 boot and run with only one voice-card connected? If so, try each board individually and see what your results are. -omar --- sent from

Yes, that was my original idea as well. However, both voice cards get the same messages, so I do not know how to seperate the commands. Maybe the voice card IDs do this (the straps on the cards).

no one is saying that moving the boards displaced the problem.You are misreading his results. Moving the boards resulted "slot" that handles voices 7-12, regardless of which board is connected to this

Dang! That means that there is something wrong with the voice card. OK, thanks, closer to the problem now. Terje Winther terje.winther@... http://www.wintherstormer.no/

Can you send me picture of the top right part of each of the voice board ? I want to see if they do not share the same ID. Here is the reason : Each voice board had his own id. This id is set with a

No, no: The ribbon cable stayed in the same position, while I swapped the boards. And yes, a board swap should not displace the problem. So I must probably be looking for something else. I am trying

The problem is that a board swap should not displace the problem... except if you do the mistake to swap the ribbon at the same time. Kris

Aha, thank you, very useful information. That gave me some ideas of what to check. Terje Terje Winther terje.winther@... http://www.wintherstormer.no/

The processor board only ask to the voice board to run the procedure. The timing tests are done by the voice board CPU and the 8253 Intel chip. So I had no idea about the origin of the problem. Kris

Yes. I had to swap the boards in order to do that, because space is limited. Yes, correct. The flat cable. Yes it is, but doesn?t the tuning procedures resides on the processor board? If so, there

Hi Karl, Thank you very much for the photos - very useful. Terje Den 9. juli. 2012 kl. 18.56 skrev Karl Schmeer:

So you swapped the connectors between the 2 voices boards. We are agree that it was the connectors at the upper right corner, right ? I ask because I don't understand how the swap displaced the

Hi Terje, Great trouble shooting!? Yes,? do reseat the chips and connectors on the Main processor board. This has been a mojor problem with these synths, but the sockets?sure make repairs easy. BTW

Very interesting update: The Matrix-12 is just two Xpander voice board on top of each other, right? So it should be OK to shift which one of the cards who is on top? Since I was always getting tuning

Try to reseat the U921 chip. This timer (8253) is used to test the frequency of VCO and VCF self oscillation. It may be dead too. The best is to test with an oscilloscope on pin 7 while doing an

Great news ! My own opinion is to not touch something which is ok. It may be safer to only touch the components potentially responsible of your problem. Kris