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®
XA4100
Troubleshooting
Problem Possible Cause Corrective Action
Amplifier does not operate
(power LED not on) when
vehicle and radio are on
Radio volume needs to be
turned up too high for amp
to work
Radio volume is too sensitive
Sound from only one speaker
Sound distorted
Blows fuses
Alternator whine in outputs
(vehicle ignition noise)
Loud pop in speakers when
power is turned on or off
Protect light comes on/
amplifier shuts down
No output on channels
Can’t find cause of problem
No power to +12V terminal
No power to remote wire with radio on
Fuse blown
Input level control (gain control)
adjusted too low
Input level control adjusted too high
Defective speaker
Poor connections to speaker (wire)
Speaker wires shorting together
RCA input cable defective
Input level control adjusted too high
Speaker wires shorting together
Power wires hooked up incorrectly
Speakers blown or defective
Radio has poor noise immunity
Improper ground connections
Remote wire (blue) not properly
connected
Amp is in thermal protection
Faulty speaker connection and/or
crossover
Low battery voltage
Speaker impedance less than 2 ohms
per channel
Speaker wires not connected to
speakers properly
Input hooked up incorrectly
Repair wire or connections
Check connections to radio with test light
Check fuse
Adjust input level control (gain control)
Adjust input level control to lower setting
Replace speaker
Check connections
Separate speaker wires and insulate
Replace cable
Adjust input level control
Separate speaker wires and insulate
Check power wire connections
Check speakers
Disconnect audio inputs to amplifier – if noise disappears
then the radio is at fault
Make sure radio and amplifier are grounded to the same point
Refer to page 4 for proper installation. If radio does not have a
power antenna lead and you have connected the remote lead to
an ignition source then you may get a “pop” in your speakers.
This is not uncommon. You may have to put a switch in line with
the remote lead to turn the amp on/off manually.
Let amp cool down before attempting to turn back on (some
installations may require a fan to keep the amp cool, especially if
you are driving subwoofers with the amp)
Check speakers and/or crossovers for loose or bad connections
Make sure you are getting between 10.8-15.6 volts to the
amplifier with a digital multimeter measured at the amplifier
If you are using 4 ohm speakers you cannot have more than two
speakers wired in parallel per channel Amp will not operate
into 2 ohms bridged
Refer to pages 5, 6 and 7 for proper installation
Contact Jensen Technical Assistance (1-800-323-0221)
5313Eamp.p65 4/10/99, 7:05 PM11
11


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