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CONNECTOR & COMPONENT IDENTIFICATION
WILLIAMS ELECTRONICS GAMES uses a special technique to identify connectors and other game
components. 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 desiqnates 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.
Other game components may also have similar prefixes preceding their deSignator to clarify their locations
or related circuit.
Prefix numbers for the System 11B circuit boards and other major assemblies are listed below. A prefix
number may precede a component desiqnator to identify its associated unit (e.g., Backbox fuse §.F1).
1 - CPU
2 - Master Interconnect
3 - Backbox Power Supply
4 - Alphanumeric Display
5 - Aux Power Driver
6 - Backbox
7 - Cabinet
8 - Playfield
9 - Insert Board
10 - Audio
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CIRCUIT BOARDS
System 11B Circuit Boards for
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are in the backbox.
They are accessible by unlocking the
Backbox lock, removing the Backbox glass, unlatching the Insert Board, and swinging it open.
The Master Display Board is mounted on the interior side of the Speaker/Display Panel, below the
Backbox glass in the Backbox. To access the Master Display Board, unlock the Backbox, remove the
Backbox glass, lift the Speaker/Display Panel, and lay it on the game cabinet.
Lamp circuit boards are mounted on the Playfield and on the Speaker/Display Panel.
CPU BOARD.
The System 11B CPU Board (p/n 0-11883-574) must be equipped with the ROMs
specified in the
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(System 11B) ROM Summary. CPU Board jumpers W1, W2, W4, W5, W7, W8,
W11, W14, W16, W17, and W19 must be connected.
AUDIO BOARD. The Audio Board is pIn 0-11581-574, including ROMs and microprocessor.
SOUND OYERLAY SOLENOID BOARD. The Sound Overlay Solenoid Board is pIn C-13287
POWER SUPPLY BOARD. The Power Supply Board is pIn 0-12246.
AUX POWER DRIYER BOARD. The Aux Power Driver Board is 0-12247-574.
MASTER INTERCONNECT BOARD. The Master Interconnect Board is 0-12313-574.
DISPLAY BOARD. The Alphanumeric Display Unit Board is pIn 0-12232-1.
TRIAC ASSEMBLY BOARD. The Triac Assembly Board is pIn C-13088, providing fan motor power.
Figure 1 shows the locations of these circuit boards, as well as other devices especially located to
make
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a great game.