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Star Tech Journal

Issue: 1991-July - Vol 13 Issue 5

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1
STAR*JECHJoumal,July, 1991. Volume 13,Number5,Copyright©
1991 by Star Tech Journal, Inc. All rights reserved. Information
contained herein is verified whenever possible but S* TJ is not re-
sponsible. however. for damages which may occur from imple-
menting this information. Address inquiries to: PO Box 1065. Mer-
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Data East Desert
Assualt Wiring
Bally Gilligan's
Island Popper Assy
Evan Wessel
Mercury Amusement Company
Havertown, Pennsylvania
Todd Tuckey
1NT Amusements
Southhampton, Pennsylvania
SYMPTOM
SUBJECT
Intermittent resetting.
Preventive maintenance: This dynamite earning
pinball should have this quick fix done to it
before you put it on location.
PROBLEM
I noticed a problem in the 2 Desert Assault
dedicated uprights I received recently. The
"Power Play 150" power supply will crank up to
a max of 5.2 volts but by the time it gets to the
board, it's down to 4. 9 volts.
CAUSE
PROBLEM
The new ball popper assembly (located at the
Lava Seltzer hole) has a screen holding the Ball
Popper cap on (it used to be a roll pin). This screw
came out after the first 1000 plays, causing a
service call only 3 days on location.
This is due to excessive wire length from the +5
Vdc supply to the board, and a JAMMA harness
that is not fully stuff ed.
SOLUTION
Cut the power supply harness length down and
add 2 wires to the empty +5 volt slots, and 2 wires
to the empty ground slots on the Jamma edge
connector to improve current flow.
These modifications were enough to give me
exactly +5.00 volts at the board.
SOLUTION
Simply take the screw out and put a small drop
ofLocktite on the threads and reassemble. This
simple procedure done now will save you time
and labor ($$$) later.
Nintendo Monitor
Horzontal Tear
Hantarex MCT 9000
Horizontal Width
Randy Terry
Alpine Amusement
Connersville, Indiana
James Beck
Greater Southern Distributing
Atlanta, Georgia
20 EZV(R-C) horizontal tear.
PROBLEM
PROBLEM
Having problems getting your MCT 9000's hori-
zontal width back down to size?
SOLUTION
Replace C42 (4. 7uf@ 50V non-polarized). This
problem is especially noticeable after replacing a
bad flyback with the new replacement part.
SYMPTOM
Monitor appears to be out of sync. Adjusting
horizontal hold causes high voltage to increase
and shut down monitor.
Checked IC401 and sync amp. TR204: both
checked fine.
SOLUTION
Replace capacitor C459(100u@ 16v). It's open.

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