Basic HTML Version
CONNECTOR
&
COMPONENT IDENTIFICATION
WILLIAMS ELECTRONICS GAMES uses a special technique to identify connectors and. 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 desiqnates jack i 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.
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 designator to identify its associated unit (e.g., connector IJ1).
,
- CPU
2 - Master Interconnect
3 - Backbox Power Supply
4 - Alphanumeric Display
9 - Insert Board
, 0 - Audio
5 - Aux Power Driver
6 .
Backbox
7 - Cabinet
8
Playfield
TAXI
CIRCUIT BOARDS
System 11B Circuit Boards for
TAXI
are in the backbox.
They are accessible by unlocking the
Backbox lock, removing the Backbox glass, unlatching the Insert Board (with lamps and the Taxi Meter
display), and swinging it open.
The Master Display Board is mounted on the back of the Speaker/Display Panel, just below the Insert
Board. To access the Master Display Board, carefully lift the Speaker/Display Panel out of its bottom
guide and lay it forward onto the top of the game cabinet.
Lamp circuit boards are mounted on the Playfield, the Insert Board, and on top of the Backbox under
the Taxi Dome.
CPU BOARD. The System 11B CPU Board (pin 0-11883-553) must be equipped with the
ROMs specified in the
TAXI
(System 11B) ROM Summary.
CPU Board jumpers Wi, W2,
W4, W5, W7, W8, W11, W14, W16, Wi7, and W19 must be connected.
AUDIO BOARD. The Audio Board is pIn 0-11581-553, including ROMs and microprocessor.
DISPLAY BOARD. The Alphanumeric Display Unit Board is pIn 0-12195-553.
POWER SUPPLY BOARD. The Power Supply Board is pIn 0-12246-553.
AUX POWER DRIVER BOARD. The Aux Power Driver Board is 0-12247-559.
MASTER INTERCONNECT BOARD. The Master Interconnect Board is D-12185-553.
Figure 1 shows the locations of these circuit boards, as well as other devices especially located to
make
TAXI
a great game.
TAXI 2
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