Need help with 7i96 card that stoped working.

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29 Jul 2021 15:45 #216234 by oficinerobotica
Yes, the red init led is on only when linuxcnc is closed.

What would be your suggestion going foreword given the info at hand?

Is the power chip a common smd that could be changed by someone with enough knowledge or is it a specialised component?
Bare in mind that I'm in Europe. I don't know how mesa operates here.

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29 Jul 2021 17:12 #216240 by PCW
The driver chips for STEP/DIR 0..3 are a 74ACT540 and a 74ACT541 (TSSOP package). The driver chip for STEP/DIR 4 is a 74ACT04. All of these are inexpensive
and commonly available.

If there has been a 5V overvoltage, the ACT parts are the first to go...
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