Hello everyone, I realize that there are similar threads active but to avoid confusion I thought I'd start a new one.
I have a willzyx x0xb0x kit that is nearly complete (just LEDs and LED resistors left to do). I just received my variable power supply and parts to make a soundcard scope so I can finally test what I have done.
The boards power supply works correctly.
I connected the variable power supply to ground and r90. On IC11 i get ~5.33V on pin 3 and ~3V on pin 5 and 7.
When I probe r105 with my soundcard scope I get nothing.
I checked pin 1 and 3 on the waveform switch. nothing.
I populated all the IC's and turned the machine on outputting a random pattern. nothing.
What else can I do to identify the problem?
Thanks in advance.