7i52s replaced ic pin continuity question

Do you have the enable signal for TX0 set low? (pin 47 on the 50 pin connector) If not, the outputs will float.

i remember i had to add this but i dont remember what it did.

setp hm2_7i80.0.gpio.000.is_output true
setp hm2_7i80.0.gpio.023.is_output true

setp hm2_7i80.0.gpio.000.out false
setp hm2_7i80.0.gpio.023.out false

now i have step signal on COM0 as well but still COM1 and COM3 dont generate Step signals.

COM 3 is buffered by U15 but COM1 is buffered by U6

Are the output levels OK? (close to 5V when high and close to 0 when low)

Are the output levels OK? (close to 5V when high and close to 0 when low)

always measured at pin TX0A/TX1A/TX2A/TX3A/TX4A/TX5A:

COM0: 0V/4.513V
COM1: 0.005V/4.495V
COM2: 0.007V/4.499V
COM3: 0.002V/4.514V
COM4: 0.005V/4.493V
COM5: 0.007V/4.500V

so basically around 0 and 4.5v

Those look about right, assuming 5V VCC at the board is about 4.5V

The 7i52s has 4.72V at the P1 plug

I would guess the the driver chips are OK now

I would trace the step signals from the FPGA card to
the outputs to see whats wrong