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11
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)
3000 Watts Parallel Bridge
Thermal
CH 1
CH 2
Signal -18 dB -9 dB E Opt I Opt
Power
Fault
A3000GTi
6000 Watts Parallel Bridge
Power
Thermal
Signal -18 dB -9 dB E Opt I Opt Fault
A6000GTi
Figure 18. Display indicates Power Output and Protection status.