Troubleshooting - Bose FreeSpace DXA 2120 Service Manual

Troubleshooting

Symptom
No power
Power is on, but no sound
Power is on, but sound is
low
Sound is distorted
Unnatural sound
User interface controls do
not operate properly
Check...
•
Turn on power.
•
Make sure the power cord is plugged in.
•
Make sure the source is turned on.
•
Verify that there is an input signal from the source. The audio
input signal indicator on the front of the chassis should be
green.
•
Check the output signal indicators on the system controls. If the
LED is no lit (green), the output levels may be too low.
•
Check the source routing.
•
Check the cable connections from the source to the chassis.
•
Verify that the audio input indicator is lit (green). If it is not lit,
increase the source output or increase the input gain.
•
Verify that the input clipping indicators are not lit (red). If an LED
is red, reduce the source output level or reduce the input gain.
•
Verify that the output clipping indicators are not lit (red). If one is
red, but input clipping LEDs are not, reduce the output gain.
•
If the input source signal is clean when it enters the chassis and
the input and output indicators are green, verify that the
loudspeakers are not overdriven or damaged.
•
Verify that the correct EQ is selected for speakers connected to
the output channel.
•
Verify that the speakers are wired correctly (+ to + and – to -).
•
Verify that the interfaces are wired correctly and to the proper
zone (if there is more than one zone).
•
Check the wiring for breaks or shorts in the cable.
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