EXONIC EX 680M - Manual (Page 8)

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E EX X 6 6880 0M M
TROUBLESHOOTING
Before removing your Amplifier, refer to list below and follow suggested procedure.
Speakers and their wires should be tested first.
No Output:
a. confirm that all terminal strip connections are firmly connected.
b. Check the in-line and built-in fuse both the "12V" and " Remote" terminals must
have 12V. Your ground terminal should read ground.
c. Confirm that signal 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.
d. If the Amplifier is hot, refer to section “ . PROTECTION CIRCUIT”.
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( right 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 connecting 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 charging system.
Confirm that the vehicle is equipped with resistor plugs and plug wires, or your charging
system may need to be serviced.
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.