JBL AV1 - Manual (Page 136)

Troubleshooting & Maintenance
JBL Performance
6-2
TROUBLESHOOTING
The AV1 does not power on.
1. Attempt to power on the AV1 with the front panel Standby
button and remote control On button.
2. Make sure the rear panel power switch is set to the c (“on”)
position.
3. Examine the power cord to ensure a good connection between
the rear panel AC input connector and the wall outlet.
4. Check the electrical circuit and breaker.
The remote control does not work.
1. Make sure the front panel IR receiver window shown on page
2-3 is not obstructed. The remote control must be in line-of-
sight with the receiver for proper operation. See “Operation
Considerations” on page 2-6 for more information.
2. Make sure the remote control batteries are correctly inserted
with the proper polarity. See “Remote Control Battery Installa-
tion” on page 1-5 for battery installation instructions.
The AV1 is powered on, but there is no audio.
1. Examine the audio cables to ensure a good connection to the
associated amplifier.
2. Make sure volume level is audible. Volume level can be
increased with the front panel volume knob or the remote con-
trol VOL
and buttons.
3. Make sure audio has not been muted. The message “MUTE
ON” or “FULL MUTE ON” will appear on the on-screen and
front panel displays when audio has been muted. To deactivate
mute, press the front panel or remote control Mute button or
use the front panel volume knob or the remote control VOL
and buttons to adjust volume level.
4. Check the INPUT SETUP menu DIGITAL IN and ANALOG IN
parameters to ensure the appropriate audio connector is assigned
to the selected input. See“Assigning Audio & Video Input Connec-
tors” on page 3-6 for more information.
5. Make sure the AV1 is receiving an audio signal. To do this, fol-
low the instructions that begin on page 2-18 to open the STA-
TUS menu for the current input source.
6. Make sure all associated power amplifiers are powered on.
Dialog sounds muffled.
If the speaker setup does not include a center speaker, make sure a
custom – as opposed to a THX – speaker setup is selected. Then,
make sure the CUSTOM SETUP menu CENTER parameter is set to
NONE. See“CENTER” on page 3-36 for more information
A humming sound is present in the audio.
1. If a cable TV connection is present, disconnect the cable from
the wall outlet. If this eliminates the humming sound, a ground
loop isolation device is required. Contact your dealer or the
cable provider for assistance.
2. Disconnect components one at a time to isolate the problem.
Once the problem is identified, make sure the associated com-
ponent is properly grounded and connected to the same elec-
trical circuit as the AV1.