SID Matrix problem Solved

[banneduser]

When I press any row button (01 Pitch, 02 Pitch, etc) all matrix lights blink. When I press any column button (E1, E2, etc) the entire column toggles on and off. I think this is not how it should work. Any Ideas what I hosed up?

Thanks,

Thomas

[TK.]

It seems that a single column button activates all other digital inputs - could be a short circuit somewhere between the buttons and the DIN module

Best Regards, Thorsten.

[banneduser]

I rechecked wiring for matrix and it looks right. I looked at the DIN board and it appears OK. Maybe a bad chip?

Thomas

[TK.]

From my experience it's a wiring error in 90% of all cases.

You could upload the MIDIO128 application in order to check if every button sends a single MIDI event. If not, you know that there is a short somewhere, and you should also be able to locate the affected digital inputs (can be derived from the sent MIDI events)

Best Regards, Thorsten.

[banneduser]

I agree that wiring error is the best probable culprit of my problems. I went back and rewired the whole matrix from scratch again. Checked all the LEDs to make sure they were connected right. I followed this with a battery check to make sure only one LED lit when a column and row were connected. They all test fine.

Next I measured continuity from all buttons to the connector on DIN and made sure each activated with no interaction with others. Continuity from LED to DOUT chech fine with no shorts or grounds.

Next I will chech my boards again to make sure I don't have anything shorted there. First I must sleep though.

Thanks for the help.

Thomas

[banneduser]

I fixed a problem with audio out, as described in another thread by reprogramming.

I still have the same problem with my matrix and I think this problem also prevents assigning SID functions to other SID modules except #1.

I will look at the circuit boards again to make sure I didn't make an error there. Further suggestions are sure welcome.

Thanks,

Thomas

[banneduser]

I finally found the problem. A bad solder joint on one pin of an IC socket on the DOUT board.

Thanks,

Thomas