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x0xb0x Not Responding to MIDI In (again)
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x0xb0x Not Responding to MIDI In (again)

by midiquestions on Sun Nov 04, 2018 1:32 am

Earlier this year, my x0x wasn't responding to MIDI notes or sequencer start messages. I retouched the connections on J3, and it worked again. Now, it's crapped out again, and I don't know why.

I took it apart, and the J3 connections all look fine, but I retouched them anyway -- still no joy though.

Checking for continuity, everything seems fine across the two boards, but I also noticed that wires 3&4 and 7&8 in J3 have continuity with each other. Is that normal, or is there a short there? I don't SEE one, but the wires are pretty small and close together.

Otherwise, anything else I can check?

midiquestions
 
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Re: x0xb0x Not Responding to MIDI In (again)

by antto on Wed Dec 26, 2018 10:02 am

http://wiki.openmusiclabs.com/wiki/x0xb ... board2.png
yes, those neighbours are supposed to be pairs

if the sequencer and "everything" else works, check that it's not the cable
also check if you got 5V on pin5 (MIDI_IN) of J3 when there's no data coming
if you have a scope or logic analyzer - see if you can clearly see the MIDI data there

antto
 
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Re: x0xb0x Not Responding to MIDI In (again)

by midiquestions on Wed Dec 26, 2018 12:26 pm

Thanks for the reply. Everything else does seem to work, yes. I don't have a scope or logic analyzer but will check the cable and pin 5.

midiquestions
 
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Please be positive and constructive with your questions and comments.