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Problem: Amplifier does not turn on. Neither the red nor blue indi-
cator lights are on.
Make sure that the amplifier is plugged in, and verify that there is
the proper voltage (120V) at the wall outlet.
Problem: The red indicator lights, but the blue indicators do not
light up when the Power switch is depressed.
1. If the amplifier is being used in a Synthesis system, make sure
that the surround processor is turned on, the Manual On/Auto
On switch is in the Auto On position, and that all of the neces-
sary DIN cables are connected between the various system
components. Refer to the “CONNECTING YOUR JBL
SYNTHESIS SYSTEM” section for reference.
2. If the amplifier is not being used with a Synthesis system, make
sure that the Manual On/Auto On switch is in the Manual On
position.
Problem: There is no sound from the speakers, but the amplifier
is on (blue indicators lit).
1. Make sure that the surround processor or equalizer is on, and
that the correct source has been connected and selected.
2. Make sure that the correct outputs are connected from the
surround processor or equalizer to the amplifier.
3. Make sure that the speakers are connected to the correct
terminals. Check for short circuits at both ends of the speaker
cables.
Problem: Not all of the amplifiers turn on in a Synthesis system.
1. Make sure that all required DIN cables are connected between
system components. Refer to the “CONNECTING YOUR JBL
SYNTHESIS SYSTEM” section.
2. Make sure that each amplifier has its Manual On/Auto On switch
in the Auto On position.
Problem: Insufficient audio from the speakers.
Check that the output levels of the surround processor or
equalizer are set properly.
Problem: Insufficient bass.
Verify that the speakers have been wired to the amplifier with the
correct polarity.
Problem: Front speakers do not switch from Music to Cinema
mode.
1. Make sure that the screw terminal and DIN adaptor cables to
speakers are correctly wired and are connected to the correct
jacks on the S5160.
2. Make sure that all required DIN cables are connected between
system components.
Problem: Audible hum from the speakers.
1. Check the power outlets and make sure that there is a solid
earth ground present. (The services of an electrician may be
required.)
2. Make sure that all signal cables are routed away from power
cords.
3. If these suggestions fail, experiment by running ground wires
between the rear-panel screws of the amplifiers and the other
system components, such as the surround processor or signal
processing package.
If you still encounter difficulty after trying the above suggestions,
call your JBL Synthesis Authorized Dealer or JBL Synthesis at
516.255.4JBL, or visit our Web site at www.jblsynthesis.com,
for further assistance.
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TROUBLESHOOTING
S5160 OM 5/31/05 2:19 PM Page 15