INSTALLATION AND SETUP
Figure 13. Installing neon tubes in a JBL GTO amplifier.
TROUBLESHOOTING
SYMPTOM | LIKELY CAUSE | SOLUTION |
No audio | No voltage at BATT+ | Check voltages at |
(POWER LED | or REM terminals, | amplifier terminals |
is off) | or bad or no ground | with VOM |
| connection |
|
No audio | DC voltage on | Amplifier may need |
(PROTECT LED | amplifier output | service; see enclosed |
flashes every |
| warranty card for |
4 seconds) |
| service information |
No audio | Amplifier is | Make sure amplifier |
(PROTECT | overheated | cooling is not blocked |
LED is on) |
| at mounting location; |
|
| verify speaker system |
|
| impedance is within |
|
| specified limits (see |
|
| “Specifications” on |
|
| the next page) |
No audio | Voltage less than 9V on | Check vehicle |
(PROTECT | BATT+ connection | charging system for |
and POWER |
| defective voltage |
LEDs flash) |
| regulator |
To Neon
Power
Supply
To Neon
Power
Supply
SYMPTOM | LIKELY CAUSE | SOLUTION |
No audio | Voltage more than 16V | Check vehicle |
(PROTECT | or less than 8.5V on | charging system for |
LED is on) | BATT+ connection | defective voltage |
| regulator |
|
Distorted audio | Input sensitivity is | Check INPUT |
| not set properly, or | LEVEL setting; or |
| amplifier or source | check speaker wires |
| unit is defective | for shorts or grounds |
Distorted audio | Short circuit in | Remove speaker leads |
and PROTECT | speaker or wire | one at a time to locate |
LED flashes |
| shorted speaker or |
|
| wire, then repair |
Music lacks | Speakers are not | Check speaker |
“punch” | connected properly | connections for |
|
| proper polarity |
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