STAR*TECH JOURNAL/OCTOBER 1982
4
WILLIAMS
"STARGATE" AND "ROBOTRON" PCB COMPATIBILITY
CPU/Video Board
CPU Video Boards from "Stargate" may be used in "Robotron" by making two cuts and
adding two jumpers. Modified boards and "Robotron" CPU/Video Boards may be used in "Stargate".
Use a 27-watt or smaller (preferably grounded) soldering pencil and 60/40 solder for all
soldering operations. Foils may be conveniently cut with a few strokes of a pocket or exacto
knife. Use #22 or small gauge wire for jumper. See illustrations below.
New Power Supply Board
Early "Stargate" games had a one-piece D8359 Power
Supply Board Assembly. In "Robotron" and later
"Stargate" games, this assembly has been superseded
by the new D-8474 Power Board and outboard heat
sink assembly C-8807. The new board features
crowbar overvoltage protection on the + 12vdc and
+5vdc regulated outputs.
FROM 5A·3
®
®
CUT-OFF
FOIL OF
PIN #3
SOLDER
TO FEEDTHRU
PIN #3 &
OF 1J4·32
JUMPER
//2~==~ TO 6F·3
0
CUT-OFF
GND FOIL
OF PIN #3
New Transformer
On upright and cabaret-model
games, a new power transformer
with 8 primary and 12 secondary
terminals (part No. 5610-09658)
has also been substituted for the
old transformer· with 8 primary
and 9 secondary terminals (part
no. 5610-09535). The new
transformer includes a 12.6v
center-tapped secondary.
Secondary terminal 20 and
center-tap terminal 19 provide
6.3vac general illumination
power to pins 14 and 15 of plug
4Pl. Cocktail table-model games
continue to use a third power
transformer with 6 primary and 9
secondary terminals (part no.
5610-09629).
SOLDER
JUMPER
TO PIN #3
®
SOLDER
PIN #4 &
JUMPER TO
IJ4·32
TOP EDGE P.C.B.
O O
O O O
O O
O
O O O O
O
O O O O O
O O
0
0
0
0
0
0
0
0
0
0
0
0
0
0 0
IJ4
0 0
©
0
0
SOLDER JUMPER FROM
5A-4 TO FEED THRU
HOLE OF IJ4-32
Upright Games
New Transformer - new Power Supply: Wl in, W2
& W3 out.
Old Transformer - new Power Supply: W2 & W3 in,
Wl out and 2 ohm 5W resistor added at R27. Pins
13, 14, & 15 of 411 are left disconnected when
transformer secondary plug is connected.
New transformer - old Power Supply: Pins 13, 14,
and 15 of 4Pl (transformer secondary connector) are
unterminated at Power Supply 411 12-pin connector.
Compact Games
New transformer - new Power Supply: Wl in, W2 &
W3 out.
Old transformer - new Power Supply: Wl, W2, &
W3 in. Pins 13, 14, & 15 of 411 are left disconnected
when transformer secondary plug is connected.
New transformer - old Power Supply: Pins 13 , 14, &
15 of 4Pl (transformer secondary connector) are
unterminated at Power Supply 411 12-pin connector.
0
IE
FROM 5A·4
40