®
LXA300
Troubleshooting
Problem | Possible Cause | Corrective Action | |
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Amplifier does not operate | No power to +12V terminal | Repair wire or connections | |
(power LED not on) when |
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vehicle and radio are on | No power to remote wire with radio on | Check connections to radio with test light | |
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| Fuse blown | Check fuse | |
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Radio volume needs to be | Input level control (gain control) | Adjust input level control (gain control) | |
turned up too high for amp | adjusted too low |
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to work |
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Radio volume is too sensitive | Input level control adjusted too high | Adjust input level control to lower setting | |
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Sound from only one speaker | Defective speaker | Replace speaker | |
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| Poor connections to speaker (wire) | Check connections | |
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| Speaker wires shorting together | Separate speaker wires and insulate | |
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| RCA input cable defective | Replace cable | |
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Sound distorted | Input level control adjusted too high | Adjust input level control | |
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Blows fuses | Speaker wires shorting together | Separate speaker wires and insulate | |
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| Power wires hooked up incorrectly | Check power wire connections | |
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| Speakers blown or defective | Check speakers | |
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Alternator whine in outputs | Radio has poor noise immunity | Disconnect audio inputs to amplifier – if noise disappears | |
(vehicle ignition noise) |
| then the radio is at fault | |
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| Improper ground connections | Make sure radio and amplifier are grounded to the same point | |
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Loud pop in speakers when | Remote wire (blue) not properly | Refer to page 4 for proper installation. If radio does not have a | |
power is turned on or off | connected | power antenna lead and you have connected the remote lead to | |
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| an ignition source then you may get a “pop” in your speakers. | |
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| This is not uncommon. You may have to put a switch in line with | |
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| the remote lead to turn the amp on/off manually. | |
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Protect light comes on/ | Amp is in thermal protection | Let amp cool down before attempting to turn back on (some | |
amplifier shuts down |
| installations may require a fan to keep the amp cool, especially if | |
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| you are driving subwoofers with the amp) | |
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| Faulty speaker connection and/or | Check speakers and/or crossovers for loose or bad connections | |
| crossover |
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| Low battery voltage | Make sure you are getting between | |
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| amplifier with a digital multimeter measured at the amplifier | |
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| Speaker impedance less than 2 ohms | If you are using 4 ohm speakers you cannot have more than two | |
| per channel | speakers wired in parallel per channel Amp will not operate | |
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| into 2 ohms bridged | |
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No output on channels | Speaker wires not connected to | Refer to pages 5, 6 and 7 for proper installation | |
| speakers properly |
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| Input hooked up incorrectly |
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Can’t find cause of problem |
| Contact Jensen Technical Assistance | |
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