Star Tech Journal

STAR*TEcH
Journal
August 1995
16YEARS OF
sT AR* TECH
DATA EAST END-OF-STROKE SWITCH
ON SOLID STATE FLIPPERS
oN
CD-ROM
DESCRIPTION OF PROGRAM
All previous editions of $TAR* TECH
jouma~ Volumes 1 - 16 (March 1979 -
February 1995) have been scanned onto
a single CD-ROM disc with a custom
Muti-Media Microsoft Windows Program
which places thousands of articles at the
fingertips of coin-op game technicians.
Eric Winston
Sega Pinball
Melrose Park, Illinois
SUBJECT
In response to Mark Anderson's
write up in last months Star Tech
journal ("Data East Solid State
Flippers Clamping Diode").
POINT AND CLICK MENUS
Select from a list of manufacturers:
Then select the game or topic you want
to view. From there, just point and click
and the issue which contains your
choice will be displayed. Either scroll
through the pages or go directly to the
article of interest.
We feel there needs to be some
clarification with regards to the
symptom "Flipper not always fir-
ing" related to the E.O.S. End of
REQUIREMENTS
All that's needed is an IBM compatible
computer (386 or better) with Windows
3.1 (or later) and a CD-ROM player. All
the technical information published in
ST J during the past sixteen years will
be yours in seconds.
PRICE
$388. US funds. COD ok in USA. Price
includes shipping US and Canada.
Other countries add $9 via air.
Stroke Switch.
NOTE
BACKROUND
Only 100 ST Jon CD-ROM discs were
made by STAR*TECH Journal. The
next run will be in March of 1996 and
will be available first to purchasers of
the initial disc (at half price}. Once you
are a registered user of ST J on CD-
ROM you will be offered future CD-
ROM releases at 50% off.
Here is a little history. Date East
Pinball incorporated the E.O.S.
switch into the flipper assembly
at the start of the Jurassic Park era.
MolNFO
For more information or to order call,
fax, email or otherwise beam your re-
quests to Star Tech Journal. Inc. PO
Box 35, Medford, NJ 08055. Phone:
609/654-5544. Fax: 609/654-1441.
Email: startech@cyberenet.net
The E.O.S. switch is actually a
low voltage switch in series with
the cabinet switch used in con-
junction with the solid state flip-
per board (part# 520-5033-00).
The reason for this switch was as
long as the flipper cabinet switch
was held in, the E.O.S. would
prevent something called flipper
fold back.
SYMPTOMS
This may have occurred when
the Raptor Pit shot the pinball at
a high velocity to the left flipper
nailing the flipper bat back to its
rest position. The E.O.S. switch
would close
and instanta-
neously re-en-
able another
40ms pulse of
50 volts.
What we also
encountered
because the
E.O.S. switch
was in series
with the cabinet switch for switch
enable was that if the switch (part
# 180-5124-00) failed, the flipper
would no longer function.
MODIFICATION
A feedback circuit modification
was designed within the Solid
State Flipper Board so flipper
operation was not affected when
the E.O.S. failed. This started
with the game "Tommy"
(part#:520-5076-00 3 flipper bd.
& 520-5080-00 2 flipper bd.) and
a new switch was designed
(part# 180-5124-01).