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TROUBLESHOOTING
No Output:
Before removing your Amplifier, refer to list below and follow suggested procedure.
Speakers and their wires should be tested first.
a. confirm that all terminal strip connections are firmly connected.
b. Check in-line and built-in fuses. Both “+12V” and “REM” terminals must have
+12 Volts to chassis ground.
c. Confirm that signai source(
Car Radio/ deck, EQ, X-over etc.
)is connected and is
supplying output signal.
To confirm that Amplifier is working, connect an RCA patch cord to LEFT & RIGHT
low-Level inputs of Amplifier only(
Do not connect the other end of the patch cord
).
Briefly tap the center pin of each(
disconnected
) RCA plug on the
other(
disconnected
) end with your finger. This should produce a noise(
feedback
)
in the speakers.
Only One Channel works:
a. confirm that speaker terminal strip connections are firmly connected.
b. Check “BALANCE” control on Car Stereo(or signal source) to verify it is at mid-point.
c. If using RCA Low-Level inputs, reverse the input plugs at the Amplifier(
righ to left or
vice versa).
If the channel that is silent reverses position, the problem is in the Car Stereo
(
EQ, X-over, or other signal source
) or connectiong cable.
Weak Output
a. Check Input Sensitivity control adjustment.
Noise in Audio
a. If noise is a “whine” that goes up and down with engine speed, confirm that
Amplifier and any other source unit(
Radio, EQ, X-over etc.
) is properly grounded.
b. A “clicking” or “popping” noise at a rate that follows engine speed is generally
induced by the vehicles’s ignition system.
Confirm that the vehicle is equipped with resistor plugs and plug wires. Or, ignition
system may need service.
c. Speaker and input wires should not be routed next to wires that interconnect lights
and other accessories/equipment.
d. If above steps do not improve/clear noise interference, the system should be
checked by a professional mobile audio installer.
Summary of Contents for ProX 840.4 COMP
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