Clarion DPX11551, APX2181, APX4361 owner manual No Audio, Blue top Red end Blue end

APX_DPX Amps.qxd 2/6/2008 11:53 AM Page 21

4.Increase the volume and verify that the amplifier reproduces the audio at full frequencies without distortion.

If you hear distortion check the connections and verify that the gain control is set correctly. Another cause of distortion could be underpowered or damaged speakers. Refer to Troubleshooting.

6.TROUBLESHOOTING Indicator lights

The APX2181, APX4361, DPX1851 and DPX11551 have lights that indicate amplifier status.

Blue top	Red end-	Blue end-
LED	panel light	panel light	Meaning
On	Off	Off	Amplifier running normally
On	Alternating between		In thermal protection mode
	red and blue
Slow blink	Slow out-of-sync	Off	Over voltage;
	blink		reduce the input voltage
Quick blink	Quick in-sync	Off	Short circuit protection
	blink
3 blinks,	3 blinks,	Off	Repeated shorts detected;
then pause	then pause		remove the short circuit, wait
			5 minutes for error condition
			to clear; or clear condition by
			removing the main power, for
			example, by pulling the fuse.

English

No Audio

•Low or no remote turn-on voltage: check remote connections at the amplifier and source unit.

•Blown amplifier fuse: replace with a new fast-blow fuse (same rating).

•Power wires not connected: check battery and ground wiring at the amplifier and check the battery connections.

•Speaker leads shorted: check speaker continuity to ground; it should not show a common ground.

•Speakers not connected or are blown: check speaker connections at the amplifier and measure at speakers. Measure coil impedance at amplifier with speaker wires disconnected.

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