| Symptom | Diagnosis | Remedy |
|
|
|
| O | |
|
|
|
|
|
| ||||
|
|
|
|
|
|
|
|
| H |
|
|
|
|
|
|
|
|
| O |
|
|
|
|
|
|
|
|
| T |
|
|
|
|
|
|
|
|
| I |
|
|
|
|
|
|
|
| ||
| Speaker Output Low | Input gain(s) for amplifier incorrectly | Readjust input gains of amplifier. |
|
|
|
| N | |
|
|
|
|
| G | ||||
| or Distorted | set. |
|
|
|
|
|
| |
|
|
|
|
|
|
|
| ||
|
|
| Source unit output too low or source | Check system with known working |
|
| |||
|
|
| unit has no output. | source and repair or replace original |
|
| |||
|
|
|
| source as needed. |
|
|
|
|
|
|
|
|
|
|
|
|
| ||
|
|
| Phase selection of amplifier incorrectly | Check speaker polarity and phase switch |
|
| |||
|
|
| selected or speakers wired out of polar- | position and correct as needed. |
|
|
|
|
|
|
|
| ity from the left to right channel. |
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||
|
|
| XCards are missing or not placed prop- | Check crossover switches and XCard |
|
| |||
|
|
| erly in crossover slots and/or switches | positions and repair or replace as nec- |
|
| |||
|
|
| are not properly selected. | essary. |
|
|
|
|
|
|
|
|
|
|
|
|
| ||
|
|
| Low battery voltage or large voltage | Check the alternator, battery, fuse or |
|
| |||
|
|
| drops to the amplifier under load. | circuit breaker and power and ground |
|
| |||
|
|
|
| wiring and repair as necessary. |
|
|
|
|
|
|
|
|
|
|
|
|
| ||
| Amplifier Noise | Voltage spike from output of preceding | Disconnect input signal to amplifier |
|
| ||||
| component is entering amplifier | and turn amplifier on and off. If noise is |
|
| |||||
|
|
| through input signal. | eliminated, connect REM lead of am- |
|
| |||
|
|
|
| plifier to source unit with a delay turn- |
|
| |||
|
|
|
| on module. |
|
|
|
|
|
|
|
|
|
|
|
|
| ||
|
|
| Voltage spike from remote | Use different 12 volt source for REM |
|
| |||
|
|
| is entering through REM input termi- | lead of amplifier (i.e., battery direct). If |
|
| |||
|
|
| nal. | noise is eliminated, use relay to isolate |
|
| |||
|
|
|
| amplifier from noise |
|
| |||
|
|
|
|
|
|
|
| ||
| No output from | RCA Input from source unit is not con- | Check connections, substitute | with |
|
| |||
| output of amplifier. | nected or not functioning properly. | known working source and cables and |
|
| ||||
|
|
|
| repair or replace as necessary. |
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
| When using the BLT, Balanced Line | Check connections, substitute | with |
|
| ||
|
|
| Input from BLT is not connected or not | known working BLT and cables and |
|
| |||
|
|
| functioning properly. | repair or replace as necessary. |
|
|
|
|
|
|
|
|
|
|
|
|
| ||
|
|
| Unbalanced/Balanced Line switch is | Check switch position and correct as |
|
| |||
|
|
| not selected for corresponding input. | necessary. |
|
|
|
|
|
|
|
|
|
|
|
|
| ||
|
|
| XCards are missing or not placed prop- | Check crossover switches and XCard |
|
| |||
|
|
| erly in crossover slots. | positions and repair or replace as nec- |
|
| |||
|
|
|
| essary. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
– 42 –
