MSefi.com read only forum (Jan.15,2018)

It's up and running again

Update, removed the HC7400 and checked signals from the cpu, they now drops all the way to 0 as they should.

I guess the hc74 are toast for some reason, a new one comes tomorrow and we'll see what happens when a fresh one is put in.

U1 socket cpu card removed power on,
21 5V
22 5V
39 0V
40 0V

Card inserted, stim running, megatune showing about 10msec PW,

21 pulses between 4.25 and 5V
22 pulses between 4.8 and 5V, you can barely see the same pattern as on pin 20.
39 pulses between 3.75 and 5V
40 same as above

74HC00
pin 14 5V ...

Got a V3 card that have been running a MS1 cpu but decided to go to a MSII cpu now, made the needed mods and started it up on the stim, everything seems to work except it wont give any signal to the injector channels?

Went back to MS1 cpu, injector channels work as they should.

I've got a scope ...

I had issues with noise being brught in to the tachinput from the injectors, I run them PWM.

Cut and rerouted the 12v raw feed to the flyback TIP125's, made a big difference but I noticed that if I dont have this connected for example on the stim the cpu wont start up?

It doesn't help that I hook ...