In addition, right when a game is started, a special solenoid can 'lock on'. This is often due to a playfield switch being stuck closed. But it can also be a problem with the 7408 or 7402 chip(s). If removing driver board connector 2j13 (upper left corner) unlocks a stuck-on co...
On system4 to system7 pinballs all the game's options and audits are stored in CMOS memory. If the batteries are dead, or the battery holder is damaged, or the blocking diode D17 has failed, or there's a bad IC19 RAM 5101 chip, or battery corrosion has damaged the CPU board, the...
Williams Blue Parts Catalog (1984-1987) 16-9064 Comet, F-14 Tomcat, Grand Lizard, High Speed, Millionaire, Pin Bot, Road Kings, Sorcerer, Space Shuttle This was an early version of the blue parts catalog, and only included 9 pinball titles (and 3 shuffle alley titles). The pages of ...
Online copies of Bally & Williams parts catalogs can be found on Planetary Pinball. Manufacturer Catalog Version Cover Source Games Notes Williams Blue Parts Catalog (1986-1989) 16-9064-B ViewerPDF Banzai Run, Big Guns, Black Knight 2000, Comet, Cyclone, Earthshaker!, F-14 Tomcat, Fire!,...
These were dark days for Williams pinball, and the added expense of a speech board prohibited their use on many System7 pinballs. Note the System7 CPU board now had an additional PIA chip just for triggering sound (and for commas in the score displays). This freed up the driver board...