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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.
Road Kings
CIRCUIT BOARDS
All major
Road Kings
Circuit Boards are in the backbox. They are accessible by removing the backbox glass,
unlatching the insert board, and swinging it open.
CPU BOARD. The System-11 CPU Board (p/n 0-10881) must be equipped with the ROMs specified
in the
Road Kings
(System-11) ROM Summary. For this ROM complement, on
Revision
B
(or later)
CPU boards (having jumpers W1 through W18): jumpers W1, W2, W4, W5, W7, W8, W11, W12, W13,
W14, W16, W17, and W18 must be connected. Jumper W7 is cut/removed for West German games.
BACKGROUND MUSIC BOARD. The Background Music Board is pIn 0-11197, as supplied with
ROM and microprocessor.
DISPLAY BOARDS.
The Alphanumeric Display Board is pIn 0-10877.
Two of the 7-digit Player
Score Displays (player 1 and 2) are pIn C-10866. The player 3 and 4 Displays are pIn C-8364-1.
The 2-digit Credit (also BALL
IN
PLAY), 2-digit MATCH Display is pIn C-8365-1.
POWER SUPPLY BOARD. The Power Supply Board is pIn 0-8345-541.
Prefix numbers for
Road Kings
System-11 circuit boards and major assemblies are listed below. A
prefix number may precede a component designator to identify the unit (e.g., connector lJ1).
1
CPU
6 - Backbox
11 - B/G Music
2
-
(not assigned)
7 - Cabinet
12 - (not assigned)
3
-
Backbox Power Supply
8 - Playfield
13 - (not assigned)
4
-
Alphanumeric Display
9 - Insert Board
14 - (not assigned)
5
-
Player Score Displays
10 - (not assigned)
15 - Flipper Power Supply
Road Kings
GAME CONTROL LOCATIONS
The On-Off switch is on the bottom of the cabinet near the right front leg.
The Volume Control is on the left inner wall of the cabinet on the tilt mechanisms board. It is accessible by open-
ing the coin box door.
The Credit switch is a pushbutton to the left of the coin door on the cabinet exterior.
GAME ADJUSTMENT/DIAGNOSTIC SWITCHES.
Road Kings
allows the operator to program virtually all game
adjustments, obtain bookkeeping information, and diagnose problems, using only three switches mounted on the
inside of the coin door and the Credit button beside the coin door.
ADVANCE, AUTO-UP/MANUAL-DOWN,
and HIGH-SCORE RESET are the switches located on
the inside of the coin door. Refer to the Game Status Displays text and the Text/Diagnostic
Procedures for details concerning their operation.
The Memory Protect switch is on the inside frame of the coin door. This interlock switch must be open to clear
bookkeeping totals and to make game adjustments.
It automatically opens, when the coin door opens.
The CPU Diagnostic switch (SW 2) is the lower switch (of the two switches mounted on the left edge of the CPU
Board) near a large, socketed microprocessor chip. This switch initiates the Memory Chip Test explained in the
Diagnostic Procedures.
The Sound Diagnostjc switch (SW 1) is the upper switch of the two mounted on the left edge of the CPU Board.
This switch initiates the Sound Section Test. Refer to the Diagnostic Procedures.