Someday very soon I will cronicle our adventures in eproms, but the story is still open. That will have to wait. I was able to finally get some time in the shop again today. It needs cleaning very badly, but I really didn't want to spend time cleaning up instead of making my F-14 functional again. I'll clean tomorrow, tonight, I get my hands on the pop bumper!
I've never done this before, so first I took a bunch of pictures, as per usual:
I'll spare the details. There are a lot of pictures.
Then it's time to lift the playfield and work underneath.
On the other side, I could not re-use a staple, and unless I wanted to simantle that side of the playfield, I could not staple it down. Instead I used some shrink tubing to insulate the post. I'll figure out a way tack that down.
With everything assembled, and an LED instead of the incandescent bulb. Here is what it looks like.
So it was bright and happy! But, why did I title this "Opening Pandora's Box"?
I turned everything on, and then tested the bumper. It popped half heartedly 3 or 4 times and then WHAM! It popped down and stayed down!
I turned off the pinball machine right away as not to damage anything. Based on my reading, I now have a bad transistor. I did some tests and confirmed that I didn't have one bad transister, I have 5. I did check that a while ago and they were all fine. I don't know what caused this but I suspect it was the shorted bumper coil.
More in the next post.