Star Tech Journal

Issue: 1991-October - Vol 13 Issue 8

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P.O. Box 1065
18 North Centre Street
Merchantville, NJ 08109
Phone:
Fax:
BBS:
)
STAR*TECH Joumal
CUSTOM/8 LINE WIRE HARNESSES
t1 Made To Order
*
Harnesses • Interface Boards • Color Conversion Pcb
JAMMA Generic Harnesses
609/662-1080
609 / 662-053 7
404/ 631-2928
JAMMA Interface Wired
Publisher /Editor:
Office Manager:
Contributors:
James Calore
Sharon Iacono
James Beck
Sam Cross
Gene Daniel
Todd Erickson
Vic Fortenbach
Bill Johnston
Tom Oldfin
Donald B. Prince
Steve Richie
Kingsley Sime
Randy Terry
STARHECH Journal, October, 1991, Volume 13, Number 8, Copy-
right© 1991 by Star Tech Journal, Inc. All rights reserved. Information
contained herein is verified whenever possible but S* TJ is not
responsible, however, for damages which may occur from imple-
menting this information. Address inquiries to: PO Box 1065, Mer-
chantville, NJ 08109. Phone: 609 /662-1080. Subscription rates: USA
$67.00. Canada $76.00 (US funds). Other Countries $120.00 Air Mail
(US funds).
POSTMASTER: Send address changes to STAR* TECH Journal, PO Box
1065, Merchantville, NJ 08109. STAR*TECHJournal(ISSN 0739-1048)
is published monthly by Star Tech Journal, Inc., 18 North Centre
Street, Merchantville, NJ 08109. Second Class postage paid at
Camden, NJ.
Conversions Made Simple With Interface Boards
Double Male Interface Board with JA MMA pinout one side and choice
of either 28/56, 22/44 or 18/36 on other side @ $12. Male/ Female
Interface Board with male JAM MA pinout on one side and choice of
28/56, 22/44 or 18/36 female connector on other@ $15. 8 line tails
@ $20 . 8 line generic complete with terminations@ $26.50. Boards
wired to your pinout $7. Nintendo Monitor Color Conversion PCB ,
instructions furnished $22. Quantity prices on request. Prices subject
to change without notice.
LOUISE'S HARNESS SHOP INC.
712 County Rd. 58, Prattville, AL 36067.
800/365-1941. 205/365-1841. Fax: 205/365-4435.
SWITCHING POWER SUPPLIES
New! Best of STAR*TECH Journal. All about Switching
Power Supplies. From the very beginning! Switchers are
covered from when they first appeared in our Industry
up to the current models and uses.
Theory and Circuit Analysis. Voltage Measurements,
Substitute Parts and Failure Modes.
Modifications. Getting negative voltages from posi-
tive-only switchers, Identifying power legs on ICs,
Capacitor Replacements.
Troubleshooting. Peter Chou, Condor, Wico, Power Plus,
Nintendo, Sieracin, HiTron, Penn-Ray.
Never before published information outside of our
journals. This info cannot be found inanyofourcurrent
service manuals.
So, if you 're looking for the definitive word on Switching
Power Supply servicing and repair, this is it. Now, you can
determine if that switcher is repairable or simply not worth
your time. Look up the symptom, perform the solution and
you 're back in business. Take another look at that pile of
useless supplies in the corner of your shop -are thay really
beyond help? Maybe not! $29.95 (plus $3.50 s/h) NJ add 7%.
STAR*TECH Journal PO Box 1065,
Merchantville, NJ 08109. 609 /662-1080
Willianis Bride of
Pinbot Relay Board
Kingsley Sime
K. Sime Machines
Lancashire, England
Dynanio HS-4
Cabinet Precaution
Todd Erickson
Summit Amusement
St. Paul, Minnesota
SUBJECT
SUBJECT
We have had problems with one machine not
lining the correct face up and struggled with all
the usual remedies with no success. We tested
the microswitches, diodes, wires off. All to no
avail.
The Dynamo HS-4 cabinet has been a real asset
to the business of kit games. It's been my expe-
rience that games will earn more in this over-
sized cabinet. And since I've purchased a 4-
player control panel from Dynamo, this cabinet
will be the game housing for the 1990's.
SOLUTION
After many hours we tracked • it down. Other
operators beware! Under the playfield there is a
small relay board described in the manual as a
lamp PCB.
PRECAUTION
This cabinet does have one major flaw. however.
On early models, if you drop the marquee down
the back while installing the game, it would snap
off the back of the CRT.
This is most definitely not a lamp relay, it con-
trols the head movement clockwise and
anticlockwiseThis is where we had a bad solder
on the relay terminal.
Not only will you have to buy a new tube, or
possibly an entire monitor, but you could very
easily harm your employee.
NOTE
SOLUTION
Save yourselves some time and mark your
manuals accordingly!
Needless to say, I feel some sort of protection
should be provided for this potentially danger-
ous area at the neck of the picture tube.
Matsushita Monitor
Bright Raster
Rowe AMI
Mechanisni Control
Randy Terry
Alpine Amusement
Connersville, Indiana
Randy Terry
Alpine Amusement
Connersville, Indiana
PROBLEM
SYMPTOM
Matsushita monitor #TM-202 G has picture
that's too bright with horizontal retrace lines.
AMI juke boxes using mechanism control board
(4-07221-02) continuously scan. Optical switch
and wiring to optical switch known good.
SYMPTOM
B+ (180vdc) low(@ 125vdc).
SOLUTION
Replace Z202 (RC 3302OB).
SOLUTION
Replace cap C559 (4. 7u 250v), it's open.

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