Replaced some dead playfield lamps + pop bumper lamp + under playfield lamps for bonus scoring and rollovers.
Game is nice and bright
Turned volume up so it can be clearly heard now.
Volume adjustment dial is on the circuit board on the right side of the inner cabinet. Photo attached.
Sound volume is much too low
Leveled playfield.
Replace the power supply’s C1 5/12 volt Filter Cap
“…Unfortunately C1 at 2900 mfd (or 4700 mfd) is way too small of a filter cap, and the fact that this cap is 30 years old isn’t helping things either. Replace this cap with a new 6800 mfd to 10,000 mfd 16 volt or higher filter capacitor.
When replacing this capacitor it is NOT necessary to take the whole power supply apart! Just cut of the old capacitor off the power supply board, leaving the old cap leads as long as possible…”
Maximum number of credits appears to be 1, but ROM and the DIP switches theoretically support max of 5, 8, 10 or 15. Not just 1. It would be good to understand why this is happening.
This is quite possibly related to the accumulator problem and possible RAM problem discussed in https://flipfix.theflip.museum/problem-reports/75/
http://www.pinrepair.com/sys1/
https://www.pinwiki.com/wiki/index.php/Gottlieb_System_1
Closed problem report