Star Tech Journal

Issue: 1990-March - Vol 12 Issue 1

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P.O. Box 1065
18 North Centre Street
Merchantville, NJ 08109




Phone: 609/662-1080
FAX:
609 / 662-053 7
Modem: 404/ 631-2928
m
Practically eliminates table-side injuries!
Practically eliminates costly property damage!
Doesn't affect table play.
Installs in 15 minutes with only a screw driver.
ALSO AVAILABLE FOR U.S. BILLIARDS!
m
Increases Player Appeal! Arcade Tested!
Publisher/Editor:
Office Manager:
James Calore
Sharon DiRenzo
100's IN USE
Throughout The United States & Canada
Made From Virtually
Contributors:
Jim Allen
James Beck
Frank Becker
Tom Cahill
Dave Cantrell
Mike Cowen
Bill Eaton
Bill Johnston
Mark McAcy
Frank Seninsky
James M. Spinello
Conrad Storz
David Waite
Bruce White
Erik Wittenzellner
Neal R. Zook
STAR*TECHJournal,March, 1990,Volume 12,Number
l, 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 l 065, 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.
INDESTRUCTIBLE SPACE-AGE MATERIAL!
LIFETIME REPLACEMENT GUARANTEE
against breakage due to puck or mallet strikes.
ORDER TODAY!
214/937-3002
CUSTOM WIRE HARNESSES
MADE TO ORDER
Harnesses .. Interface Boards • Color Conversion Pcb
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.
JAMMA Interface Wired
Conversions Made Simple With Interface Boards
Double Male Interface Board with JAM MA pin out 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.Quantity 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.
BALLY /MIDWAY
ELECTROHOME/WELLS
TRI-SPORTS FLICKER
GARDNER FADING
Bill Johnston
Johnston's General Store
Buffalo, New York
James Beck
Greater Southern Distributing
Atlanta, Georgia
PROBLEM
Annoying flicker in Bally /Midway's Tri-
Sports video which can promote eyestrain.
SYMPTOM
The left side of the monitor is dark while the
right side displays normal video.
SOLUTION
New updated Roms available from your Wil-
liams/Bally /Midway distributor cures this
condition. Call for availability.
CAUSE
The problem described is caused by a poorly
filtered B+ boost coming from the flyback.
OBSERVATIONS
Tri-Sports does have appeal but I question
the menu type of choices and wonder if it
would be more player-friendly with separate
game select buttons [3]. Somehow, I felt it
leaned a bit toward the Playchoice game type
selecting method, which is fine for the kids,
but unfriendly for the tavern adults ... or so
it seems from here.
SOLUTION
On an Electrohome G07 chassis monitor the
filter cap is located on the neck board. Check
or replace cap Cl07, 10 mfd at 250v. When
it fails it causes excessive brightness, i.e.
with the screen control turned all the way
down, the picture still has retrace lines in it.
We do badly need a good tavern piece these
days, so I hope this fits the need & price.
On the Wells Gardner K4900 series moni-
tors chassis, the cap that will cause side to
side fading is C702 ( 1 0uf, 1 0Ov) located near
the flyback on the main board. Replace this
cap with 1 0uf at 160 volts
***
***
1990 UPDATE FOR S*TJ's
MONITOR MANUAL
New! Monitor articles covered in 1989/90 publishing
year in a handy format. Over 30 new video monitor
Symptoms & Fixes that appeared in STAR*TECH
Journal's Volume 11 (March '89 - February '90).
Update your technical library with this valuable refer-
ence text. $9.95 (2.50 s/h). S*TJ, PO Box 1065,
Merchantville, NJ 08109. COD call 609/662-1080.

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