Sega WaveRunner Owner's Manual page 11

For the IC board circuit inspections, only the logic tester is allowed. The use
STOP
of a multiple-purpose tester is not permitted, so be careful in this regard.
The Projector is employed for this machine. The Projector's screen is
IMPORTANT
susceptible to damage, therefore, be very careful when cleaning the screen.
For details, refer to PROJECTOR.
Some parts are the ones designed and manufactured not specifically for this
game machine. The manufacturers may discontinue, or change the
specifications of, such general-purpose parts. If this is the case, Sega cannot
repair or replace a failed game machine whether or not a warranty period has
expired.
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