Star Tech Journal

STAR*TEcH
Journal
December 1996
CD
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• ♦ SERVICING·
MONITORS·
MAGICAL TOUCH
RocK-0LA
COUNTER TOP
SYBER50NIC
LOSING POWER
BASS RESPONSE
WHEN HOT
NOTES
Mark Anderson
Gilchrist Vending
Toronto, Ontario
Ed Glapinski
Rock-Ola Manufacturing Corp.
Torrance, CA
SUBJECT
PROBLEM
We have had a couple of Magical
Touch video games lose power
after several hours. These use a
special power supply made by
Dee Van which supplies more
voltages than conventional game
power supplies.
Poor bass reproduction in loca-
tions where a Rock-Ola
SyberSonic CD Jukebox replaced
a Rowe Jukebox.
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♦ MONITORS:.
Symptoms/Solutions •
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Together they cover nearly
every monitor used in the
coin-op games industry from
1979 to 1996. Modifications,
enhancements, troubleshoot-
ing, parts sources, replace-
ments and a ton of fixes by
easy-to-find symptom/solu-
tion format. Both manuals
designed to lay flat on a
bench for ease of viewing.
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___________ ...
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Order Form
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: Name: - - - - - - - -
SOLUTION
After several hours of testing and
experimenting I determined the
problem to be in the overvoltage
shutdown circuit, although I have
no schematics to verify this.
Changing R106 to 8.2k from 9.lk
solved the problem. This resistor
is located near the output filter
capacitors.
SOLUTION
On Rock-OlaJukeboxes, itis not
necessary to reverse polarity to
the left channel to achieve maxi-
mum fidelity.
Ensure that all speakers are con-
nected "positive to positive and
negative to negative." Reverse
polarity on any speaker will cause
a reduction in the bass response.
: Company:, _ _ _ _ _ _ _
. : Address: _ _ _ _ _ _ _
V1RTUALITY BRINGS BACK PAc-MAN
• City: _ _ _ _ _ _ _ _
: State/Zip: _ _ _ _ _ _
• 0 Servicing Monitors $49
O Monitors: Sym/Sol $69
0 $99@ Set.
Please add $4.50 for S&H. ($ 11 via Air).
•
Thank you!
: Prepaid or COD: 609/654-5544.
: S*TJ, Box 35, Medford, NJ 08055. :
: Fax: 609/654-1441.
...........................
. .
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