Basic HTML Version
1 - CPU
2 - Backbox Interconnect
3 - Backbox Power Supply
4 - Alphanumeric Display
5 -
Aux Power Driver
6 -
Backbox
7 -
Cabinet
8 -
Playfield
9 -
Insert Board
10 -
Audio.
CONNECTOR IDENTIFICATION
WILLIAMS ELECTRONICS GAMES uses a special technique to identify connectors.
Each plug or
jack receives a prefix number (which identifies the circuit board), a letter, and a number.
J-designations refer to the male part of a connector.
P-designations refer to the female part of a
connector. For example, 1J1 designates jack 1 of board 1 (a CPU Board jack); 3P6 designates plug 6
of board 3 ( a Power Supply Board plug).
Identifying the specific pin number of a connector involves a hyphen, which separates the pin number
from the plug or jack designation. For example, 1J1-3 refers to pin 3 of jack 1 on board 1.
lE3AN7l.AlI IEJ1JN
CIRCUIT BOARDS
System 11B Circuit Boards are in the
BANZAI RUN
backbox, behind the upper playfield. They are
accessible by (a) unlocking and raising the marquee, and latching its support arm; (b)
pressing the Ball
Lifter motor switch briefly to raise the Ball Lifter to clear the lower playfield;
and (c) unlatching the upper
playfield and carefully tilting it forward onto the lower playfield.
CPU BOARD. The System 11B CPU Board (pIn D-11883-566) must be equipped with the
ROMs specified in the
BANZAI RUN
(System 11 B) ROM Summary.
For this ROM
complement and CPU Board, jumpers W1, W2, W4, W5, W7, W8, W11, W14, W16, W17,
and W19 must be connected.
BACKBOX INTERCONNECT BOARD. The Backbox Interconnect Board is D-12112.
AUDIO BOARD. The Audio Board is pIn 0-11581-566, as supplied with ROMs and micro-
processor.
MASTER DISPLAY BOARD. The Alphanumeric Master Display Board is pIn D-10877. This
board is mounted on the interior side of the Score Display & Lamp Board Assembly,
D-12146, mounted in the marquee, just behind the marquee glass.
POWER SUPPLY BOARD. The Power Supply Board is pIn D-8345-566.
AUX POWER DRIVER BOARD. The Aux Power Driver Board is D-12247-566.
Prefix numbers for the System 11B circuit boards and other major assemblies are listed
below. A prefix number may precede a component designator to identify the unit (e.g., con-
nector lJ1).