Star Tech Journal

January 1994
1'.-rAR TECH JOURNAL
DATA EAST
JURASSIC PARK
CONTROL ROOM MOD
Steve Bergerud
Regal Vending/ Amusements
Iowa
City,
Iowa
UNDERSIDE Of PLA YFIELD
SYMPTOM
Jurassic Park
control room
features do not
activate when
ball is shot into
control room
hole.
ROBLEM
Diode leads on
the
center
scoop switch
#37 break off
due to vibra-
tion from force
of the ball go-
ing into the
chute. Factory
prevention for
this problem is
a dab of sili-
cone glue -but
breakage still
occurs.
SOLUTION
0
Pop Bumpers
Q
0
.
wraps of the wir-
ing harness, re-
moved the diode
from the center
scoop switch
and connected
the unused di-
ode to the switch
-using
the
speaker wire.Be
sure to observe
polarity. (see
Diagram 1)
CURE
Remove diode & connect to spare
This allows the
wire to flex; be-
cause it is now
twisted wire ver-
sus the solid wire
of the diode
across the switch
and this presents
further break-
age.
diode as shown using speaker wire.
BOTTOM LINE
wire
Wiring harness
I modified all of
There is a spare
our Jurassic
diode fastened
Park machines
to the under-
and have had no
ide of the
further trouble. Before this
playfield directly in the center PROCEDURE
that is not used. No wires are I took an 8" piece of speaker wire modification, I was replacing di-
and ran it through one of the tie- odes almost weekly.
conn~cted to it.
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