Table of Contents
Advertisement
INSTALLATION AND SETUP
Figure 13. Installing neon tubes in a JBL GTO amplifier.
TROUBLESHOOTING
SYMPTOM
LIKELY CAUSE
No audio
No voltage at BATT+
(POWER LED
or REM terminals,
is off)
or bad or no ground
connection
No audio
DC voltage on
(PROTECT LED
amplifier output
flashes every
4 seconds)
No audio
Amplifier is
(PROTECT
overheated
LED is on)
No audio
Voltage less than 9V on
(PROTECT
BATT+ connection
and POWER
LEDs flash)
SOLUTION
SYMPTOM
Check voltages at
No audio
amplifier terminals
(PROTECT
with VOM
LED is on)
Amplifier may need
Distorted audio
service; see enclosed
warranty card for
service information
Make sure amplifier
Distorted audio
cooling is not blocked
and PROTECT
at mounting location;
LED flashes
verify speaker system
impedance is within
Music lacks
specified limits (see
"punch"
"Specifications" on
the next page)
Check vehicle
charging system for
defective voltage
regulator
6
To Neon
Power
Supply
To Neon
Power
Supply
LIKELY CAUSE
Voltage more than 16V
or less than 8.5V on
BATT+ connection
regulator
Input sensitivity is
not set properly, or
amplifier or source
unit is defective
Short circuit in
speaker or wire
Speakers are not
connected properly
SOLUTION
Check vehicle
charging system for
defective voltage
Check INPUT
LEVEL setting; or
check speaker wires
for shorts or grounds
Remove speaker leads
one at a time to locate
shorted speaker or
wire, then repair
Check speaker
connections for
proper polarity
Advertisement
Table of Contents
