JBL SCS 175 Sub (serv.man3) Service Manual ▷ View online
Center
+ –
+ –
+ –
Left Front
+ –
Left Surround
Center
Right Front
+ –
Right Surround
Receiver
+ –
Left Front
– +
Right Front
– +
Left Surround
+ –
Right Surround
+ –
L
R
Subwoofer out
Serie no.
Made in Denmark
Harman Consumer International
TM
SCS175
(230V)
simple
setup guide
setup guide
Line Level
min max
Subwoofer
Level
min max
Subwoofer
Level
Volume
If your receiver has subwoofer
output jacks, you may connect
the SCS175 using this method.
output jacks, you may connect
the SCS175 using this method.
Note: Some receivers/
amplifiers have a single
(mono) subwoofer output. In
this case, it is recommended
that you use a “Y”-connector
(not included) to maximize the
subwoofer’s performance.
amplifiers have a single
(mono) subwoofer output. In
this case, it is recommended
that you use a “Y”-connector
(not included) to maximize the
subwoofer’s performance.
Crossover Frequency
The crossover frequency knob
determines the highest frequen-
cy your subwoofer will reprodu-
ce. It allows a seamless transi-
tion from the subwoofer to the
satellite speakers. Experiment
with this adjustment to find
the crossover frequency that
sounds best with your speakers.
determines the highest frequen-
cy your subwoofer will reprodu-
ce. It allows a seamless transi-
tion from the subwoofer to the
satellite speakers. Experiment
with this adjustment to find
the crossover frequency that
sounds best with your speakers.
When the control is at the
”40 Hz“ position, very few
high frequencies will be heard.
This position is best suited to
large main speakers. For most
users, the control should be
set somewhere near the mid
position. For listeners using
very small speakers, best
”40 Hz“ position, very few
high frequencies will be heard.
This position is best suited to
large main speakers. For most
users, the control should be
set somewhere near the mid
position. For listeners using
very small speakers, best
results will be obtained with
the control at the ”130 Hz“
position.
For subwoofers used with
Surround Sound processors
with dedicated subwoofer out-
puts, the best result will be
obtained with the control at
the ”130 Hz“ position.
the control at the ”130 Hz“
position.
For subwoofers used with
Surround Sound processors
with dedicated subwoofer out-
puts, the best result will be
obtained with the control at
the ”130 Hz“ position.
4
If there is no sound from any
of the speakers, check the
following:
of the speakers, check the
following:
• Receiver/amplifier is on and a
source is playing.
source is playing.
• Powered subwoofer is plugged
in and is in the “On” position.
in and is in the “On” position.
• Check all wires and con-
nections between receiver/
amplifier and speakers. Make
sure all wires are connected.
Make sure none of the speaker
wires are frayed, cut or
punctured.
nections between receiver/
amplifier and speakers. Make
sure all wires are connected.
Make sure none of the speaker
wires are frayed, cut or
punctured.
• Review proper operation of
your receiver/amplifier.
your receiver/amplifier.
If there is no sound coming
from one speaker, check the
following:
from one speaker, check the
following:
• Check the “Balance” control
on your receiver/amplifier.
on your receiver/amplifier.
• Check all wires and con-
nections between receiver/
amplifier and speakers. Make
sure all wires are connected.
Make sure none of the
speaker wires are frayed, cut or
punctured.
nections between receiver/
amplifier and speakers. Make
sure all wires are connected.
Make sure none of the
speaker wires are frayed, cut or
punctured.
If the system plays at low
volumes but shuts off as vol-
ume is increased, check the
following:
volumes but shuts off as vol-
ume is increased, check the
following:
• Check all wires and con-
nections between receiver/
amplifier and speakers. Make
sure all wires are connected.
Make sure none of the
speaker wires are frayed, cut or
punctured.
nections between receiver/
amplifier and speakers. Make
sure all wires are connected.
Make sure none of the
speaker wires are frayed, cut or
punctured.
• If more than one pair of main
speakers is being used, check
the minimum impedance
requirements of your
receiver/amplifier.
speakers is being used, check
the minimum impedance
requirements of your
receiver/amplifier.
If there is low bass output,
check the following:
check the following:
• Make sure the connections to
the left and right “Speaker
Inputs” have the correct
polarity (+ and –).
the left and right “Speaker
Inputs” have the correct
polarity (+ and –).
• Make sure that the subwoofer
is plugged into an active elec-
trical outlet and is turned on.
is plugged into an active elec-
trical outlet and is turned on.
If there is no sound from
the surround speakers, check
the following:
the surround speakers, check
the following:
• Check all wires and con-
nections between receiver/
amplifier and speakers. Make
sure all wires are connected.
Make sure none of the
speaker wires are frayed, cut or
punctured.
nections between receiver/
amplifier and speakers. Make
sure all wires are connected.
Make sure none of the
speaker wires are frayed, cut or
punctured.
• Review proper operation of
your receiver/amplifier and its
surround sound features.
your receiver/amplifier and its
surround sound features.
• Make sure the movie or TV
show you are watching is
recorded in Dolby surround. If it
is not, check to see if your
receiver/amplifier has other
surround modes you may use.
show you are watching is
recorded in Dolby surround. If it
is not, check to see if your
receiver/amplifier has other
surround modes you may use.
Troubleshooting
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