Many different system configurations are possible using the crossovers and pre- amp outputs featured in Power Series amplifiers. If you are considering expanding you system beyond what is shown here, please consult your local JBL installation specialist, who is experi- enced in designing complex mobile- audio systems.
Troubleshooting
Use the following guide to identify symptoms and solve problems. Make sure the vehicle’s electrical system is working properly and power is reaching the amplifier.
Symptom | Likely Cause | Solution |
No audio | Low/no remote on voltage | Check connections; |
| Speakers are not connected | Check wiring; use VOM/DVM to |
| or are blown | measure |
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|
|
Distorted audio | Input sensitivity is not set properly | See Setting Input Sensitivity on page 5 |
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|
Audio lacks “punch” | Speakers are wired with wrong polarity | Check polarity of connections; |
|
| refer to Applications |
|
|
|
Audio cycles off and on; | A protection circuit is turning the | Verify the following: off electrical system is |
amber protection LED | amplifier off and on | between 5 ~ 18 Vdc; temperature is not |
(JBL badge on top panel) |
| over 194°F (90°C); there are no short circuits; |
is flashing |
| speaker loads are not less than 2 ohms |
|
| (4 ohms in mono) |
|
|
|
Audio cycles off and on; amber | GAIN is set too high | Set Input Sensitivity correctly |
protection LED (on top panel) | (see previous page) |
|
is flashing |
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|
|
Fuse blows | Incorrect wiring or short circuit | Check connections; refer to Applications |
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