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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 designates plug 6 of
board 3 ( a Power Supply Board plug).
Idel1tifying 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 designato r to identify its associated unit (e
.g.,
Backbox fu se §.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
®Bl© ©Bl'rr®
CIRCUIT BOARDS
System 11B Circuit Boards for ®&.© ©&.'ii'$ 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 front of the Insert Board, along with the 7-Segment Display
Board. To access the Master Display Board, unlock the Backbox and remove the Backbox glass.
Lamp circuit boards are mounted on the Playfield and on top of the Backbox under the BAD CATS Dome.
CPU BOARD. The System 11B CPU Board (pin 0-11883-575) must be equipped with the ROMs
specified in the OO&.®C~'im (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 0-11581-575. including ROMs and microprocessor.
DISPLAY BOARD. The Alphanumeric Display Unit Board is
pIn 0-12232-1.
POWER SUPPLY BOARD. The Power Supply Board is pIn 0-12246.
AUX POWER DRIVER BOARD. The Aux Power Driver Board is 0-12247-566.
MASTER INTERCONNECT BOARD. The Master Interconnect Board is 0-12313-575.
Figure 1 shows the locations of these circuit boards, as well as other devices especially located to
make
~£[Q)
©~
'ij'$
a great game.