Star Tech Journal

S*T J
APRIL 1981
Rowe AMI
Number Conversions
EARLY WARNING
(Reid Malmenance 11psJ
by Todd Erickson
♦♦
♦♦
by Craig Miller
1. Due to the large amount of play that many new
Stem pins are getting, a few of the plastic links on
the flippers are breaking. I recommend visually
inspecting the links for cracks while collecting.
2. On many new Midway games the test switch is
located where it may be bumped while taking the
cash box in and out. Bending the bracket back will
generally eliminate the problem.
3. On Williams pins that have intermittant problems,
replace the 12K cap on the power supply board.
The blue ones with T.I. on them generally have had
the most failures. I recommend replacing with a
higher voltage rating. Also, inspect for leaking cap
at random.
The part number often found on AMI parts is a
letter-number combination such as R-2179A. To
convert this to a stock number for ordering
purposes, use the following table:
Leading Letter
Last Letter
F= 2
H=3
L= 4
R=6
S = 7
Convert as follows:
Part number R-2179A
A= 1
B=02
C=03
0=04
Etc.
New style stock number 6-02179-01
Old style stock number 601-02179
Use the new style stock number to order.
Exidy ''SPECTAR" Program Update Mod
(11 A-1 to 11 A-2)
The 11 A-1 to 11 A-2 EPROM change allows the player to
see all nine of the playing fields in sequence during the
attract mode, instead of just the first playing field as viewed
with the 11 A-1. It also adds one final playing field for
advanced high scoring players.
NOTE: The 11 A-2 is a 5-volt only EPROM and cannot be
mixed with boards using 3 voltage EPROMS. If your
SPECTAR has 3 voltage EPROMS they must be replaced
with the 5-volt only type. Any questions concerning this
matter can be answered by contacting EXIDY Customer
Service Dept.
H
MAIN LOGIC PCB
F
E
11A
D
I
16 15
DB □□□□□
1413121110 9 8 7 6
C
B
A
5
4
3
2
1
5