No steps Mesa 7i76e

If you have 0V between Step+ and Step- or Dir+ and Dir-, this means that
one or both of the Step/Dir output driver chips have been damaged.

How much static voltage should i have been able to get ?
Are those the two chips in front of the TB2 connectors?

Without load you should always get +5V or -5V from DIR+ to DIR- and STEP+ to STEP-
(5V or -5V depending on the output state, STEP+ and DIR+ should always be the logical inverse of STEP- and DIR-)

The driver chips are a 74ACT540 (U12) and a 74ACT541 (U19)

I have to admit that i over powered the P3 connector by putting the terminal of the positive on the 12 volts instead of the 5 volts. Dumb mistake.
I was hoping for the best since nothing was connected to it and no other components show any traces of damage. So these are the octal buffers that create the step/dir signals or act more like the ones in a computer clocking the bits?

Thanks you have been very helpfull. I realy appreciate the time you spent helping me. You seem to know a lot about these cards.What do you do for a living?

ggsxx wrote:

Thanks you have been very helpfull. I realy appreciate the time you spent helping me. You seem to know a lot about these cards.What do you do for a living?

PCW = Peter owns Mesa so you can't get better that that. The best and quickest help you can fine.