AUDIO PROBLEMS
1:
Audio is non-functional, but video is present and game appears to operate normally.
A: Unlock and open the coin door.
Enter the game Menu System by pressing and holding the
BEGIN TEST switch inside the coin door. From the Marn menu, choose VOLUME LEVEL (refer
to Section Two for additional details). Verify that the volume levels have not been set at Zero.
Change the levels
If
necessary to make the game audible.
B.
From the ADJUSTMENTS menu, choose ATTRACT SOUND to see if this feature is active (ON)
C:
Follow the on-screen instructions to return to the first menu. Select DIAGNOSTICS from the
Marn
menu Once in the DIAGNOSTICS menu, choose SOUND SUBSYSTEM These tests will
confirm the operation of each segment of the sound system.
D:
Turn OFF the game power. Open the marquee and remove the glass. Inspect the speakers and
harness. Ensure that no loose parts or wires are caught in speaker cones, terminals, mounting
screws, or stuck to the magnets.
>
E:
Verify correct cabinet wiring for this game Ensure that the speakers are properly connected to
the audio output wires from the JAMMA connector. Verify speaker and wire harness continuity
Refer to the Cabinet Wiring Diagram (Section Three) for specific wiring Information.
F: Turn ON the game power. Using the 20 Volt D.C. setting on a digital voltmeter, measure D.C.
voltages present at the Power connector pins. Verify the +5V. -5V and +12V sources. Refer to
the Cabinet Wiring Diagram (Section Three) for specific wiring informatron and voltage limits.
G.
Using the 2 Volt A.C. setting on a digital voltmeter, measure the same D.C. voltages as above.
Any readrng here indicates that the supply voltages are unstable and may contain ripple or noise.
H:
Verify proper operation of game CPU Board Assembly by placing it in a known good game.
2:
The audio is distorted, muffled or missing frequencies. A constant low hum may be present.
A: Unlock and open the coin door. Enter the game Menu System by pressing and holding the
BEGIN TEST switch inside the coin door. From the Main menu, choose DIAGNOSTICS from the
Marn
menu. Once in the DIAGNOSTICS menu, choose SOUND SUBSYSTEM. These tests will
confirm the operatron of each segment of the sound system.
B:
Turn OFF the game power. Open the marquee and check the speakers. This game uses coaxial
speakers, not discrete woofer and tweeter units. Ensure that each speaker is FULL RANGE (100
to 10,000 Hz response) and rated for at least 25 WATTS.
C:
Check that the speaker wiring is not reversed at one of the speakers. Weak low frequencies and
a thin or hollow sound quality is a symptom of incorrectly phased speakers. This condition may
not be detected by the SOUND SUBSYSTEM, but it will be audible during normal game operation.
D: Check that the cabinet wiring is correct for this game
Verrfy
that the cabinet wiring provide?,
separate wires (not a common return) for each speaker. Ensure that all cabinet ground wires a!:
connected. Refer to the Cabinet Wiring Diagram (Section Three) for specific wiring informatron.
E:
Using the 2 Volt A.C. setting on a digital voltmeter, measure voltages at the speaker terminals
Any readrng here indicates that the supply voltages are unstable and may contain ripple or noise.
F,
Verify that the speaker is operating properly by placing in a known good unit.
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