80sarcade
Member
I have a Pac-man board that is dead. I am going over the power voltages and determined that Q6 looked to be dead. I am getting only 3.1 volts out of the Base leg. The voltages on the power brick look fine and I checked the fuses, all check ok. (yes I removed the fuses to check and tested the voltages at the brick) 
Here are some of the other voltages I am getting.
R52 - 16v should be 12v
Q6 B= 2.2v C=8.3v E=3.1v
R53 3.1v
C3 3.1v
C8 and C9 8.3v
Looking at this, it appears that Q6 is dead. I picked up a TIP31 and replace, no change to the board, dead. (did pick this up at RS and this may be my new problem, it is listed as a TIP31a)
So any more suggestions? Does this look like a bad Q6 and did I replace it with a bad one from Radio Shack, of is it something else?
Paul
Here are some of the other voltages I am getting.
R52 - 16v should be 12v
Q6 B= 2.2v C=8.3v E=3.1v
R53 3.1v
C3 3.1v
C8 and C9 8.3v
Looking at this, it appears that Q6 is dead. I picked up a TIP31 and replace, no change to the board, dead. (did pick this up at RS and this may be my new problem, it is listed as a TIP31a)
So any more suggestions? Does this look like a bad Q6 and did I replace it with a bad one from Radio Shack, of is it something else?
Paul
