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Connector Identification
Since
ELVIRA
is using WILLIAMSELECIRONICS GAMES System lIB, a new
connector identification technique must be introduced. Each plug or jack receives
a prefix number (which identifies the circuit board), followed by a letter
("J"
or "P").
and a number. J-designations refer to the male part of a connector. Psdestgnattons
refer to the female part of a connector. For example, IJI designates jack 1 of board
3 (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, IJI-3
refers to pin 3 ofjack 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 lIB Circuit boards and other major assemblies are
listed below. A prefix number may precede a component designator to identify its
associated unit (e.g., connectorlJl).
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 - Sound Board
Circuitboards
System lIB Circuit Boards for
ELVIRA
are in the backbox. They are accessible by
unlocking the Backbox lock, removing the Backbox glass, unlatching the Insert
Board (with lamps and the Digital Display Boards), and swinging it open.
Lamp circuit boards are mounted on the Playfield and the Insert Board.
Control Board
The System lIB CPU Board
(pin
0-11883-2011) must be equipped with the
ROMs specified in the
Elvira
ROM Summary. CPU Board jumpers WI, W2,
W4. W5. W7, W8, WH. W14, W16, W17, and W19mustbe connected.
Sound Board
The Sound Board Is p/n D-11581-2011. including ROMs and micro-
processor.
Display Board
ELVIRA
has two Display Boards. The BALLYLo-Dlsplay Beard is p/n D-
12502-1, and the BALLYHi-Display Board is pin 0-12706.
1-2 Control Locations