Number_Nine wrote: ↑Sun Oct 01, 2017 11:04 pm
I thought that too and have even bought more MC1377s, but if I just measure pin 9 on socket without the IC, then I should see something like >5-6VDC, but I see only this:
I would confirm your IC's are "blown" on your other machine before anything else..
or try a brand new IC (never before being used) and lift pin 9 and re-check..
I suspect every IC you are putting in that faulty STE is blowing your 1377's up.
You clearly have all the inputs as I do, but no outputs, so , IC faulty or something is blowing the IC up, IE, CB short on Q404.
So if you make sure you lift pin 9, or remove R442... and try a new never before used IC... and see what happens...