Troubleshooting
PROBLEM
CONDITION
CAUSE
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| • Amplifier not plugged in. | |
| Power Indicator LED is off. | • AC outlet dead. | |
| • Power switch off. | ||
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| • Circuit breaker tripped. | |
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| Power Indicator LED is red. | • No signal from source. | |
| Input Signal / Clip LED is off. | • Module not installed correctly. | |
NO SOUND |
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Power Indicator LED is red. | • Master or input channel volume control turned down. | ||
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| Input Signal / Clip LED is green. | ||
| • Rear panel master mute terminal shorted. | ||
| LED Output Meter is off. | ||
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| Power Indicator LED is red. | • Speaker connections on amplifier are incorrect. | |
| • Trans / Direct Out selector not set correctly. | ||
| Input Signal / Clip LED is green. | ||
| • Poor / broken speaker wiring. | ||
| LED Output Meter is operating. | ||
| • Defective speakers. | ||
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| Power Indicator LED is red. |
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| Input Signal / Clip LED is green. | • Partial short on the output. | |
| Volume Controls are turned up and | ||
| shows little activity. |
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| Unit is extremely hot. |
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| Power Indicator LED is red. | • Signal from source is already distorted. | |
| • Poor speaker connections. | ||
| Input Signal / Clip LED is green. | ||
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DISTORTED | LED Output Meter is not in red. | ||
• Bass control boosted too much. | |||
SOUND |
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| Power Indicator LED is red. | • Input signal level to module too high (should cause red | |
| clip LED). | ||
| Input Signal / Clip LED is red. | ||
| • Input module gain too high (if available). | ||
| LED Output Meter is not in red. | ||
| • Input module being overdriven by a high input signal. | ||
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| Power Indicator LED is red. | • Input volume controls set too high. | |
| Input Signal / Clip LED is green. | ||
| • Input master volume control set too high. | ||
| LED Output Meter in red. | ||
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POOR | Power Indicator LED is red. | • Speakers wired out of phase. | |
LOW FREQ. | • Check module bass control setting (if available). | ||
Input / Signal Clip LED is green. | |||
RESPONSE | • Check bass control setting | ||
LED Output Meter not in red. | |||
(NO BASS) | • Note: | ||
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| response. | |
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| • Poor electrical connections at input. | |
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| • Input cable routed near AC cables, power transformer, or | |
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| other EMI radiating devices. | |
| Power Indicator LED is red. | • Electrically noisy devices operating on the same AC | |
NOISE/HUM | Volume controls are in normal, | circuit. | |
| operational position. | • Poor equipment grounding. | |
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| - Ensure that all AC safety grounds are connected. | |
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| - Make sure that all components in audio chain are tied to | |
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| the same ground. | |
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