Technical Tips at www.ticketflex.com
Williams/Bally WPC System & System 11.
Intermittent Problems in
Certainly the most annoying
problems are those which happen intermittently. Whenever we want take some
action everything seems to work perfectly. So what is the best way to tackle
them? Look for simple things first:
Check connectors which could
become loose especially after transportation.
Check important voltages such
as the main logic voltage +5V. If it is a video game measure it on game
board, directly on the JAMMA connector. Make sure that the voltage is
within the range 4.9 to 5.1V.
Connectors which generate heat
are a sign of bad connection and have to be fixed.
Try to find out when the
problem happens. It may be when the game warms up which could lead you to
a faulty fan. The game could be sensitive to vibration. Try to
induce a bit of vibration by tapping different parts of the machine (PSU,
Game Board etc,) with the handle of your screwdriver (be careful not to
damage anything). This may lead you to the part of the machine which
causes the problem.
Take advantage of two same
machines. For example if your Daytona Twin intermittently freezes and you
suspect that the game board is the cause, use the good unit to swap the
boards around. If the fault follows the board which may happen in two days
time, you made a big step forward in identifying the source of the problem
and further action can be taken.
It is always preferable to
test the suspected faulty unit in a good machine than the other way
Electromagnetic or electrical
interference generated from within the machine or outside the machine
could also be a cause of malfunction. For example a fault in a fluorescent
illumination can generate enough interference to reset your video game.
Disconnect the fluoro temporarily and see whether the problem disappears.
It is also worthwhile to try another power point or move the machine to
another place in case that the interference is external.
Static electricity could also
explain damage of equipment or intermittent malfunction especially in
locations with carpeted floors and in hot and dry climates. Check whether
the protection earth is connected to all parts of the machine (e.g. Coin
Door) as it supposed to.
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