dbx 223s, Руководство пользователя

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223s, 223xs,
234s, 234xs
Section 6
Troubleshooting
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Section 6 - Troubleshooting
NO SOUND
If there appears to be no power:
• Check that either the stereo or mono LED on the front panel of the 234s/234xs or
223s/223xs is lit.
• Check that the power cord is seated properly in the back panel of the crossover and that
it is plugged into an active AC power source.
If there appears to be power, but no audible signal:
• Confirm that active audio lines are connected to the crossover’s inputs and outputs.
• Check that both the input and output gain controls are advanced sufficiently.
• Check to make sure that you have turned up the amplifiers’ outputs.
ABNORMAL AUDIO OUTPUT
• Ensure that the proper mode for your setup has been selected via the rear panel mode
switches.
• Check the LF Sum switch.
• Check the x10 switch. This changes the range of the crossover frequency from 45 - 960
Hz to 450 Hz - 9.6 kHz.
HUM AND/OR BUZZ
If you suspect that the hum is caused by a ground loop:
• Systematically remove and/or connect the audio grounds of the devices in the signal
path.
• Remember, for safety you must maintain connection to chassis ground. Never lift a safety
ground.
If you suspect the hum is not caused by a ground loop.
• Check the audio at an earlier stage in the audio chain.
• Low level equipment should be mounted away from power amplifiers to avoid induction
of this type of hum.
• Be certain that all audio wiring except for loudspeaker lines is well shielded, and that
low level wiring is not run parallel to and/or in close proximity to AC power wiring.
INTERMITTENT AUDIO
• Check the other equipment and the wiring to make certain that the signal is not
intermittent earlier in the chain.
• Check the integrity of all cables using a cable tester.