Audio Troubleshooting Table
SYMPTOM
CAUSE
REQUIRED ACTION
Enter Menu System by pressing and
holding
.
No audio
Improper volume
TEST MODE switch. From Self-Test (Main)
setting
Menu, choose ADJUST VOLUME. Check that
.
Video is present
Attract Music is on (enabled). Verify that all
volume levels are set well above zero. If
.
VGM appears to operate
necessary, change levels to make VGM audible.
normally
Turn off VGM power. Assure that wiring harness
Faulty wiring
connectors attach and fully seat onto mating
board connectors. Verify that harness connects
to circuit boards. Check audio cable connectors
in same way.
Faulty or obstructed
Remove grilles and inspect speakers. Free
speaker
speaker cones, terminals, mounting screws and
magnets of loose parts or wires.
Faulty Audio Board
Verify proper operation of Audio Board by
placing it in working VGM.
1.
Check that cabinet wiring is correct for this VGM.
.
Constant low hum from all
Faulty wiring
2. Verify that cabinet wiring provides separate
speakers.
wires (not common return) for each speaker.
3.
Check connection of all cabinet ground wires.
1. Run power-up self-test sequence. Note errors
Faulty Sound
that VGM finds during tests. Compare Sound I/O
Board
Board
with LED indicator status charts.
Note discrepancies.
2.
Verify that Sound I/O Board operates by placing
it in working VGM. Replace bad parts.
Using 2 Volt AC setting on digital voltmeter,
Faulty power supply
measure voltages at speaker terminals. Any
reading indicates unstable supply that may
contain ripple or noise.
1.
Turn off VGM power. Remove grilles and check
.
Audio is distorted, muffled or
Faulty or
speakers. Assure that speakers are full range
has missing frequencies.
speaker
(100 to 10,000 Hz response) and rated for at
least 20 watts. Woofers must be rated for at
least 40 watts.
Faulty wiring
2. Verify proper speaker operation by connecting
speaker in question to working VGM.
Multiple-speaker
installations:
Check
for
reversed wires at one speaker. Weak low
frequencies and thin or hollow sound quality is
symptom of incorrectly phased speakers. Sound
tests may not detect this condition, but you can
hear it during VGM operation.
1. From Self-Test Menu, choose SOUND TEST.
.
Dead sound channel
Faulty speaker
Recheck speakers with audio signals provided
by test.
Faulty circuit board
2. Verify proper speaker operation by connecting
speaker in question to working VGM.
Run power-up self-test sequence. Note errors
that VGM finds during tests. Compare
board
with LED indicator status charts.
Note discrepancies.
Faulty wiring
Verify that cabinet wiring is correct. Assure that
all speakers connect to audio wires. Check for
broken or shorted wires.
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Summary of Contents for San Francisco Rush 2049
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