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Symptom | Diagnosis | Remedy |
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Speaker Output | Input gain signal for | Readjust | input | gains of |
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Low or Distorted | amplifier is incorrectly | amplifier. |
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| set. |
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| Source unit output too | Check system with known |
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| low or source unit has | working source and repair |
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| no output. | or replace original source |
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| as needed. |
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| XCard is missing or not | Check XCard position and |
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| placed properly in cross- | repair or replace as neces- |
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| over slots. | sary. |
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| Low battery voltage or | Check the alternator, bat- |
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| large voltage drops to | tery, fuse, and power and |
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| the amplifier under load. | ground wiring. Repair as |
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| necessary. |
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No Output on | Signal Input Switches not | Check | Signal | Input |
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Front, Rear or Sub | configured properly. | Switches and reconfigure |
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| as necessary. |
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Channels |
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| XCard(s) missing or not | Check XCard position(s) |
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| placed properly in cross- | and repair or replace as |
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| over slot. | necessary. |
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Low Output on | Signal Input Switches do | Check | Signal | Input |
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Sub Channel | not configure Sub Chan- | Switches and reconfigure |
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nel for single RCA input. | as necessary. |
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Amplifier Noise | Voltage spike from out- | Disconnect input signal to |
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put of preceding compo- | amplifier and turn amplifier |
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nent is entering amplifier | on and off. If noise is elimi- |
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| through input signal. | nated, connect REM lead of |
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| amplifier to source unit with |
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| a delay |
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| Voltage spike from re- | Use a different 12 volt |
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| mote | source for REM lead of am- |
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| tering through REM in- | plifier (i.e., battery direct). If |
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| put terminal. | noise is eliminated, use a |
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| relay to | isolate | amplifier |
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| from noisy |
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– 33 –