I just got my doctor who and it has some issues.
time expander needs a complete rebuild (ill get to this later)
upper flipper has no power to the coil
I cleaned and fixed most of the loose stuff today but I am not finding an easy solution for this upper left flipper problem.
I ohmed out the fuse 902 and its new.
I have 74v at both ends of the fuse
I have no voltage at the coil lugs
I have no voltage at Q1 and Q2 tip36's
Q3 and Q4 have 74v
J902 has no voltage for pins 1 and 3, the other pins for the other Tip36's have 74v each.
J907 has 74v on the pins.
What other test points are there to isolate this cause?
Is it just a bad Tip36?