Midway 4-Player 25" Dedicated Video Game, Operation Manual

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Diagnostic, Audit & Adjustment Menu System for NBA 4-11
Main Menu (continued)
Diagnostics Menu (continued)
Speaker Test Menu
SPEAKER TEST
Select SPEAKER TEST at the Diagnostics Menu. The Speaker Test provides audio signals to test the
loudspeakers.
Use tests on the Speaker Test menu to verify operation of audio system components. Highlight an option
with any player panel joystick. Select the option with any player panel button.
SPEAKER TEST
LEFT CHANNEL
CENTER CHANNEL
RIGHT CHANNEL
100 HZ TONE
1 KHZ TONE
PLAY TUNE
EXIT
SPEAKER TEST MENU
Channel and Tone Tests. The channel subtests employ voice announcements to verify speaker
locations. Use the 100 Hz tone to check the speakers’ bass response. Small speakers with weak
magnets or poor baffles may cause poor bass response.
Play Tune repeats a series of game sounds. Use PLAY TUNE to check speaker operation and fidelity. If
your game has stereo speakers, run PLAY TUNE and test speaker phasing. Muddy, weak or distorted
sound during this test may indicate crossed wires or out-of-phase speaker connections. Missing sounds
may indicate audio cabling errors.
NOTICE: Check the volume setting before testing. To test the speakers thoroughly,
increase the volume level. Before returning to Game-Over Mode, reset the volume
level to its original setting.