Problem: Amplifier does not turn on. Neither the red nor blue
indicator lights are on.
Make sure that the amplifier is plugged in, and verify that there is
the proper voltage (230V) 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 Auto On/Manual
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 SYNTHESIS
SYSTEM" section for reference.
2. If the amplifier is not being used with a Synthesis system, make
sure that the Auto On/Manual On switch is in the Manual On
Problem: There is no sound from the speakers, but the amplifi-
er 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 ter-
minals. Check for short circuits at both ends of the speaker
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 SYN-
THESIS SYSTEM" section.
2. Make sure that each amplifier has its Auto On/Manual 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
1. Make sure that the screw terminal and DIN adapter 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
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
2. Make sure that all signal cables are routed away from power
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
If you still encounter difficulty after trying the above suggestions, call
your JBL Authorized Dealer or visit our website at www.jbl.com for