I have been working on a very nice 1977 Superspin. I had to do alot of work to it, various issues. Repair Log:
1. Cleaned score reel digits
2. Removed all playfield parts, cleaned, waxed playfield, polished most of the chrome including acorn nuts. Installed new rubbers
3. Repaired loose flipper bat
4. Replaced all GI bulbs on playfield
5. Replaced general illumination bulbs behind backglass
6. Purchased wiring diagram!!
7. Replaced power cord, with ground plug
8. Cleaned roto targets. Removed roto target disc. Cleaned contacts, Screw was missing, other loose. Fixed
9. Cleaned contacts on player bank in backbox
10. Cleaned contacts on match unit. Match lights not working. Cleaned contact ons on associated relay.
11. Cleaned switch contacts for Player 2 lights, none working.
12. Rollover lights not working. Cleaned contacts on advance relay. Cleaned contacts on Bonus unit. Shaft bushing is worn. Lights working.
13. Installed an alligator clip on switch contacts on credit unit to make it go free play! Easily removed to go back to quarters.