JBL A6000GTi, A3000GTi owner manual Troubleshooting, Symptom Likely Cause Solution

TROUBLESHOOTING

SYMPTOM	LIKELY CAUSE	SOLUTION
No audio	No voltage at power	Check BATT+, REMOTE and
(Power LED is off)	or remote terminal	GND – terminals with VOM for
		blown fuse or poor connection
	Internal fuse blown	Replace internal fuse
	(incorrect power	(see Replacing the Fuse
	connections)	or Neon Tubes section)
No audio	Low or high voltage	Check BATT+ terminal with
(Power LED	at power terminal	VOM for voltage between
is flashing)		10 and 16 Vdc; if not within
		limits, check vehicle’s
		electrical system
No audio	Direct current on	Disconnect cable from
(Power and	speaker output(s)	REMOTE terminal; if Fault LED
Fault LEDs		is still on, contact local JBL
are on)		service center
No audio	Internal amplifier	Check for blocked vents
(Power and	temperature is over	or whether the ambient
Thermal LEDs	85° C	temperature is above 85° C
are on)
Distorted audio	Amplifier’s gain is	Properly adjust the
(I OPT and/or	set to High	LEVEL control (see
E OPT LED[s]		Setting Input
are on more		Sensitivity section)
than off)
Distorted audio	Defective source unit	Try new source unit
(I OPT and/or
E OPT LED[s]	Shorted speaker	Disconnect wires from
work correctly)	wires	SPEAKER OUTPUTS and
		check for shorts between
		wires, or between a wire and
		the vehicle’s chassis
Music lacks	Speakers are out	Check speaker connections
“punch”	of phase	(see sections on speaker
		connections)
	Wrong output mode	Verify output mode setting
		(see Making the Connections
		section)
Neon tubes do	No voltage to neon tubes	Check LIGHTING
not light	for +12 Vdc	terminal with VOM
	Neon tubes are dead	Replace neon tubes
		(see Replacing the Fuse
		or Neon Tubes section)

Power	6000 Watts Parallel Bridge
A6000GTi
Thermal	Signal -18 dB -9 dB E Opt I Opt	Fault

A3000GTi		3000 Watts Parallel Bridge
	CH 1	Power
	Thermal	Signal -18 dB -9 dB E Opt I Opt
	CH 2	Fault

Figure 18. Display indicates Power Output and Protection status.

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