ssRat5
New member
Hello all,
I just got my very first arcade machine, a non-working Baby Pac-man. So far the best I can tell is the monitor comes to a white screen and the MPU is stuck a green light. (Not sure if the issues are related)
I figured I would start with the MPU and I have been trying to follow the guide (http://forums.arcade-museum.com/showthread.php?t=243363) regarding this to the best of my novice abilities and here is where I am at.
1. Checked the test points on the MPU and they check out except for TP3 which is much lower, I assume that the Baby pac is lower than other MPUs? (I think I saw that somewhere)
2. Checked pin 40 on U9 at power up, checked out ok.
3. Checked U9 pins, 3, 5, 36, 40, checked out ok I think, pin 5 was about 2.2 I think, not sure if that is good enough.
I haven't pulled and reseated the ICs yet, I ordered a puller because I was nervous using a screw driver. The battery was replaced at some point but looks ok to me. Is my next step replacing U6, U9, U11 ? If so and suggestions where to order from or should I try to get the equipment to do it myself?
Thank you for any suggestions you have and for making this a great forum!
Michael
I just got my very first arcade machine, a non-working Baby Pac-man. So far the best I can tell is the monitor comes to a white screen and the MPU is stuck a green light. (Not sure if the issues are related)
I figured I would start with the MPU and I have been trying to follow the guide (http://forums.arcade-museum.com/showthread.php?t=243363) regarding this to the best of my novice abilities and here is where I am at.
1. Checked the test points on the MPU and they check out except for TP3 which is much lower, I assume that the Baby pac is lower than other MPUs? (I think I saw that somewhere)
2. Checked pin 40 on U9 at power up, checked out ok.
3. Checked U9 pins, 3, 5, 36, 40, checked out ok I think, pin 5 was about 2.2 I think, not sure if that is good enough.
I haven't pulled and reseated the ICs yet, I ordered a puller because I was nervous using a screw driver. The battery was replaced at some point but looks ok to me. Is my next step replacing U6, U9, U11 ? If so and suggestions where to order from or should I try to get the equipment to do it myself?
Thank you for any suggestions you have and for making this a great forum!
Michael