Star Tech Journal

S*T J
WILLIAMS
Midway "Rally X"
Static PCB
SERVICE NOTES
Williams Electronics is testing the
use of heavy-duty micro-switches in
its new pin game, "Jungle Lord". The
use of these switches is designed to
alleviate switch problems in critical
areas.
Other improvements Williams is look-
ing into include a new flipper assembly
and redesigned drop target assem-
blies utilizing individual switches
instead of their previously standard
circuit board set-up.
All of Williams' new designs can be
retro-fit to all other previous pin
games to reduce service calls.
The new CPU board (-7E), used first
on "Black Knight" is compatible
with all previous games. The -7E
CPU incorporates additional fea-
tures such as a new diagnostic test
utilizing a 7-segment display to locate
a failed CPU component. Also, all
programming can be done from the
front door, no need to open the back
box to zero the audit functions or
reset to factory settings.
Note: When assembling "Black Knight''
or when replacing the playfield or head,
there are two 36 pin plugs which come
off of the playfield and go to the back
box. These are color-coded and if assem-
bled wrong will result in severe damage
to the CPU and driver boards! Orient the
plugs correctly to prevent this costly (the
warranty is voided) mistake.
Note: Because "Black Knight" uses a
maximum number of switches, resistors
R204 through R211 (330..Cl.) in the
switch matrix row input circuit ion the
driver board have been omitted (jumpered
with O ohm resistors) to assure a correct
read from all switches.
This style driver board may be used as-is
on any Williams game. Do Not adjust any
switch with power on as a momentary
short may take out the driver PCB switch
circuitry.
Note: The general illumination problem
has been solved. Starting with "Black
Knight", Williams has installed a new
transformer with a 6.3 VAC tap to insure
longer life for the playfield and back box
lamp bulbs. The old style transformers
has a wider tolerance for the 6.3 VAC
winding and it was not uncommon to
have over 7 VAC lamp supply that
drastically reduced bulb life.
(See S* TJ Vol. 3 No. 2)
3
MAY 1981
GAME: "RALLY X"
SUBJECT: STATIC FILTER BOARD PC #A084-91392-B935
Some filter boards were shipped from Midway's parts dept.,
with the key slots on the wrong side. (See figure #1.)
cut new slots here
~
~gside
_,,,...,,,..,,-,--------mn
.--r
I
I I I
~----- u u
------
A082-91375-BOOO
FIGURE #1
NOTE - Filter boards can be returned to Midway in
exchange for the proper keyed type.
0
0
CENTURI
" PH O E N IX"
P
T
I
O
N
0
s
1. "PHOENIX" SPACESHIP SETTING
Looking at the wide customer play variation of
"PHOENIX" and its affect on cashbox intake,
Centuri recommends the number of spaceships per
play be limited to three (3).
This adjustment can be done by placing dip switches
one (]) and two (2), located on the logic board
assembly, to the "ON" position.
2. "PHOENIX" 50¢ PER PLAY OPTION
The 50¢ per play option that has been incorporated
on the latest "PHOENIX" boards can be controlled
by dip switch number five (5). Set switch to "OFF"for
25¢ per play. Set switch to "ON" for 50¢ per play.
Please note that the game counts number of coins
inserted and not number of credits. If no change
occurs in pricing when the dip switch is placed in
either direction, E-Proms R0-Rl-R2 and RJ need to
be exchanged with the new E-Proms available through
Centuri's Parts Department.