Full EM service pass
Steps
- Work one area at a time: playfield (removed to a bench), backbox board, then the cabinet floor board. Sketch anything you take apart.
- File and inspect every switch; adjust only those that do not open or close. If you find yourself adjusting most of them, stop: you are probably making things worse.
- Check every switch for broken or badly soldered wires, broken blades, loose contacts, stray solder and screws or nuts lodged in stacks, and tighten switch stack screws.
- Strip and clean each solenoid, checking the stop, plunger, link and sleeve for wear.
- Clean the contacts of all stepper units (score reels, bonus, player, ball count, match and credit units) without dismantling them unless necessary.
- Clean the large interconnect plugs, reassemble and test.
Systems
Source: Pinball Machine Care & Maintenance, Bernard B. Kamoroff (Bell Springs Pinball Alley)