Wells-Gardner_K7300_series_repair
K7500 quick guide
Wells_Gardner_K7000_Manual
Schematic

Neck Board Pots – http://homearcade.org/BBBB/k7000nb.html

Main Board Pots – http://arcadecontrols.com/BBBB/g07pot.html

https://forums.arcade-museum.com/threads/common-k7000-issues-common-repairs.134818/
http://www.therealbobroberts.net/dead.html

19 Inch P447

25 Inch P538