February 1986 (2)
STAR*TECH Journal
CAUSE: The utility portion of the program
contained in U3 has been modified for
purposes of internal testing; starting
with game #300 of BEAT THE CI.OCK.
Iaostar "1942" R> Sound Clieck
By Dennis Sable, Technical Manager
Rom.star Inc.
Torrance, CA
CURE: A l0OK ohm, 1/ 4 watt resistor has
been connected from the +5 volt buss to
pin 12 of Ul (6803 CPU).
POOBLEM: There are 2 configurations of
"1942" PCBs. On the type with a small
daughter board attached to each of the
main boards, a nurrber of jumper wires have
been installed on the solder side of the
top board. '.lbese wires can easily become
disconnect.e a and should be the first thing
checked when troubleshooting for any
malfunction.
NJTE: This resistor addition has
on all control boards containing
updated program and must be made
converting an earlier game (i.e.
Ball Chanp) to any newer game.
been made
the
when
Eight
cc>ut_o
c,;:e
Jt~0 . , ~ ~
We at Rom.star would like to apologize for
any inconvenience that these changes and
corrections have caused. If you have any
questions or if you would just like to
vent your frustration, please call: Dennis
Sable, Technical Manager, ROMSTAR
231/539-2744
Meoetron MT MNIA Video lbl
By John Repici
Active Amusements
Philadelphia, PA
.
.b
.
POOBLEM: When converting machJ.nes with old
style Wells Gardner nonitors (19K4600
Series) to Memetron's Ml\T Ml\NIA, the
picture is "washed out" with many lighter
colors appearing as white.
FIX: Use circuit shown below.
O)MMENI'S: Ceramic disk caps are fine.
If you use electrolitic or tantalum caps,
make sure the plus (+) side is toward the
logic board (as shown).
Wl'E: This fix is in addition to any sync
inversion (7404) schemes.
> ~Ep
A
Dl
~
(
.1~.(
~
Q
~
~>11,(lEBI
~
..,I
I u.. > -Slue
I (
-1,.q/
i - ..
f
~
.1.,11/
¼
2.. 1 /<..
-.
~
Please send your input to:
~
Pi
2.,~
'='
I (
:t
~
~
T
,.
I will be conducting a seminar on the Do's
and Don'ts of conversions at the upcoming
A.C.M.E. show in Chicago and would
appreciate any tricks or tips that you in
the field might have come up with.
I will compile all of the suggestions that
I receive and send this list, along with a
list of all major garres and kits that have
come out within the last 5 years showing
nonitor and power requirements, to all of
you.
►
2. 1,C
INPC1.r NERDED
Dennis Sable
Technical Manager
ROMSTAR INC.
3043 Kashiwa St.
Torrence, CA 90505
*** Input nust be received by February
25th, 1986.