22. TROUBLESHOOTING
Symptom | Possible Cause | Remedy |
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Noise generated. | Module mounting screw not | If this screw is loose, noise may be produced. |
| securely tightened. | Ensure that the screw is tightened. |
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Excessive noise. | Incorrect module input | The unit is designed to digitize audio signals |
| sensitivity setting. | with an AD converter and vary the input level |
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| with a digital volume control. |
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| Therefore, noise increases if the input or |
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| output volume control is set to a level higher |
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| than 0 dB while the AD converter input is kept |
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| low. |
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Sound distorted. | Incorrect module input | The unit is designed to digitize audio signals |
| sensitivity setting. | with an AD converter and vary the input level |
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| with a digital volume control. |
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| Therefore, when an extremely large input is |
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| fed into the AD converter, the voice remains |
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| distorted even if the volume is decreased. |
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Phantom power not | If this screw is loose, phantom power is not | |
supplied. | screw not securely tightened. | supplied. Ensure that the module mounting |
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| screw is tightened. |
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Phantom power not | Phantom power set to OFF | If phantom power is set to OFF in |
supplied. | in | module input setting, phantom power is not |
| setting. | supplied. Set phantom power to ON in the |
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| setting. |
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Condenser microphone | Condenser microphone of | The |
does not operate | the type powered by over | +24 V. |
correctly. | +24 V is used. | If using a condenser microphone powered by |
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| over +24 V, separately prepare phantom |
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| power supply equipment recommended by the |
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| equipment manufacturer. |
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Amplifier malfunctioned | Incorrect item or parameter | Check the related setting items and set |
(does not operated as | setting. | contents. |
intended.) |
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