Hello all - I've finally decided to break out of my EM repair safety zone and try my hand at fixing a SS. I picked up a dead Stern Galaxy that I think will clean up pretty well. I've been reading a lot of previous threads on other Galaxy pins, as well as watching some youtube videos I found on repairing the pin. Hoping you guys can help direct and teach me as I learn about the SS world. Please feel free to ask me for pics or more info as I go, happy to oblige.
What I know so far:
- I don't see much wire hackery or anything strange, in fact most stuff looks completely original
- Battery was still in place, some leakage corrosion, but not anywhere near as bad as others I've seen pics of before. I removed it and started the clean-up process. Corrosion seems to be in one general "drip-down" area beneath the battery, mostly on the surface of a few components, not all over the boards, so that's good.
- Fuses are all good and proper ratings.
- Several connectors/pins look burnt/crispy, but based on what I'm seeing in other threads/videos, this is not uncommon, but clearly need replacing/cleanup.
It was suggested I do some basic voltage testing, starting with the TA 100 board and test points TP1 thru TP5. Here are the not so good readings (proper readings per TP 100 label in parenthesis):
TP1 = No reading (should be 5.4 VDC)
TP2 = 246 VDC (190 VDC)
TP3 = 14.7 VDC (11.9 VDC)
TP4 = No reading (43 VDC)
TP5 = 21.7 VAC (7.3 VAC)
Since the game isn't running, I'm guessing that might explain some of the higher voltages? The complete lack of reading at TP1 and TP4 are obviously not good.
As for what the game does, it emits a series of beeps/tones (2 short, pause, 1 short, pause, 2 longer). One display has a slight orange glow, oddly enough.
I know I have a LOT to do here, and I welcome advice/suggestions. Thanks!