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Star Tech Journal

Issue: 1990-May - Vol 12 Issue 3

CUSTOM WIRE HARNESSES
MADE TO ORDER
Harnesses • Interface Boards • Color Conversion Pcb
P.O. Box 1065
18 North Centre Street
Merchantville, NJ 08109
JAMMA Generic Harnesses: 1 thru 25: $15.50, 26 thru 50: $14,
51 thru 75: $12.50, 76 thru 100: $10.50, over 100: $9.
Normally shipped same day as ordered.
Phone: 609/662-1080
FAX:
609/662-0537
Modem: 404/631-2928
JAMMA Interface Wired
Publisher /Editor:
Office Manager:
Project Manager:
James Calore
Sharon DiRenzo
Neil Calore
Contributors:
James Beck
Frank Becker
John M. Bevar
Erwin H. Boot
John Buras
Mike Cowen
Sam Cross
Dari Davidson
Phillip Del Grosso
Doug Hutton
Tommy D. Lynn
John T. Moon II
Brian Schorr
Frank Seninsky
Mark Sherman
STAR*TECHJournal,May, 1990,Volume 12,Number3,
Copyright© 1990 by Star Tech Journal, Inc. All rights
reserved. Address inquiries to: PO Box 1065, Mer-
chantville, NJ 08109. Phone: 609/662-1080. Subscrip-
tion rates: USA $67 .00. Canada $76.00 (US funds).
Other Countries $120.00 Air Mail (US funds).
POSTMASTER: Send address changes to ST AR* TECH
Journal, PO Box 1065, Merchantville, NJ 08109.
STAR*TECH Journal (ISSN 0739-1048) is published
monthly by Star Tech Journal, Inc., 18 North Centre
Street, Merchantville, NJ 08109. Second Class post-
age paid at Camden, NJ.
Conversions Made Simple With Interface Boards
Double Male Interface Board with JAM MA pinout one side and choice
of either 28/56, 22/44 or 18/36 on other side: $12. Male/Female
Interface Board with JAM MA printout on male side and choice of 28/
56, 22/44 or 18/36 female connector on other: $15. All boards have
provisions for jumpers from one side to the other. Boards wired to
your pinout: $7. Nintendo Monitor Color Conversion PCB Simple
installation, instructions furnished: $22.Ouantity prices on request.
Prices subject to change without notice.
LOUISE'S HARNESS SHOP
712 County Rd. 58, Prattville, AL 36067.
800/365-1941. 205/365-1841. Fax: 205/365-4435.
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Practically eliminates costly property damage!
Doesn't affect table play.
Installs in 15 minutes with only a screw driver.
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Made From Virtually
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LIFETIME REPLACEMENT GUARANTEE
against breakage due to puck or mallet strikes.
ORDER TODAY!
800/933-0145
Hantarex MTC 9000
Sync Proble:m
Willia:ms Earth-
shaker Dead Pin
John M. Bevar
Ries Amusement, Inc.
Denison, Iowa
Phillip Del Grosso
Alpha Amusements, Inc.
Warren, Michigan
PROBLEM
Try to lock in the composite sync on the
monitor and all you get is garbage.
PROBLEM
No display, no sound, no logic.
SOLUTION
Most games today use the negative compos-
ite sync setup but when this monitor is
hooked up that way there is no sync. The
manual says that Pin 1 onjackCBisground,
Pin 2 is the negative vertical sync and Pin 3
is the negative horizontal synch. This is
incorrect.
CORRECT PINOUT
Pin 1 is the negative horizontal sync, Pin 2 is
the negative vertical sync and Pin 3 is
ground. This should take care of the negative
composite sync hookup. You will still have a
problem with the vertical sync lock in. As
with Hantarex's 9000 series monitors you
must not connect the negative vertical sync
Pin 2 to the negative composite sync line
from the game board.
SYMPTOM
Power up pin, and I get nothing. I scope CPU
and fmd no address on chip. Looks like
watch dog circuit barking. I call Williams
and they suggest possible bad blanking cir-
cuit check. I can fmd nothing wrong.
CURE
Out of desperation, I disconnect switch
matrix and power up - game comes up, huh?
Come to find out, someone had closed front
coin door slam switch.
Yeah, I know, this sounds dumb, but it sure
would help us techs (and operators) if Wil-
liams' programmers would give us a display
alert if such a condition has occurred in-
stead of shutting down the CPU and leaving
us sitting around scratching our heads!
NSM City IV & Galaxy CD Juke Pricing
Erwin H. Boot
Automatic Music Company
Hobart, Tasmania
SYMPTOM
NSM City WCombi & Galaxy full CD Jukes:
Meter P03/0 is the resettable coin counter,
with P03/ 1 being the non-resettable
counter. In fact, due to limitations in the
system, including the 16 bit processor, the
non-resettable meter will in fact reset when
it is "full." (Under our coin value and coin
channel allocation, it resets to zero when it
reaches($) 3276-80).
SOLUTION
So if you suddenly get a reset on P03 / 1
(without any other metering or program-
ming problems) it is most likely that the CPU
board is not faulty but that with your coin
value and coin channel allocation, you've
also blown the limit.

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