Dual XPA2500 Troubleshooting, Xpa Series Operation, Problem, Cause, Action, green but no sound

XPA SERIES OPERATION

Troubleshooting

Problem	Cause	Action
Unit will not turn on	+12V wire not connected or incorrect voltage	Check connections for proper voltage
(no power LED indicator)	REM wire not connected or incorrect voltage	(11~16VDC)
	GND wire not connected	Check connection to ground
	Fuse(s) blown	Replace fuse(s)
Unit has power - LED is	Speaker wires not connected	Check connections at speakers
green (but no sound)	Volume turned all the way down	Increase volume level at head unit
	One or more speaker wires touching each	Insulate all bare speaker wires from each
	other or touching chassis ground	other and chassis ground
	Speaker(s) defective or damaged	Check/replace speaker(s)
	Input signal not connected	Check high or low level inputs for proper
		connection
Unit blows fuse(s)	Incorrect fuse rating	Use fuse(s) with correct rating
	+12V wire touching chassis ground	Check for pinched wire
	Speaker(s) defective or damaged	Check/replace speaker(s)
Engine noise	Bad ground connection	Make sure amplifier is grounded to clean
		bare metal
	Signal ground loop or RFI (radio frequency	Re-route RCA cables from existing high
	interference)	current wiring
LED illuminates red	One or more speaker wires touching each	Insulate all bare speaker wires from each
(protect mode)	other or touching chassis ground	other and chassis ground
	Speaker(s) defective or	Check/replace speaker(s)
	damaged internally (shorted)
	Speaker load less than 2 ohms (stereo)	Adjust speaker load - amplifier will not
	Speaker load less than 4 ohms (bridged)	operate at less than 4 ohms when bridged
Distorted audio output	Incorrect input signal type or	Check connections and reduce/adjust input
	input level too high	level
Low audio output	Incorrect input signal type or	Check connections and increase/adjust
	input level too low	input level
Weak bass	Speaker(s) are wired out of phase	Check (+) and (-) speaker connections
		(Observe correct polarity)

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NSA0608-V01