JBL Scs1806 Manual

  Surround Cinema Series 
 
Models:   SCS150SI SCS160SI 
SCS180.6S 
Home Theater Speaker Systems 
 
SERVICE MANUAL 
 
 
 
     
JBL Consumer Products 
      250 Crossways Park Dr. 
        Woodbury, New York   11797      Rev
4    10/2005   

 
-  CONTENTS  - 
 
BASIC SPECIFICATIONS……………….……….……………….1 
DETAILED SPECIFICATIONS  ……..………………..…………..2 
CONNECTIONS…………… …..……………...…………..……...3 
OPERATION………………………………………………………. 6 
BASIC TROUBLESHOOTING……..……….…………………….7 
EXPLODED VIEW ……..……….………………………………….8 
TEST SET-UP AND PROCEDURE……..……….………..……..9 
PCB DRAW INGS…………… ……..………………..…….……..10 
MECHANICAL/SATELLITE PARTS LIST………………………16 
ELECTRICAL PARTS LIST ……………....……………….…….17 
IC/TRANSISTOR PINOUTS……..…….…………………..…….22 
SCHEMATICS...

 150W Powered Sub/ Plate Amp 
LINE VOLTAGE Yes/No Hi/Lo Line Unit Notes
US 120vac/60Hz Yes 108-132 Vrms Normal Operation
 Asia 100vac/50Hz Yes 90-110 Vrms Normal Operation
Paramete
rSpecification Unit QA Test LimitsConditions Notes
Amp Section
Type (Class AB, D, other) D D  n/a
Load Impedance (speaker) 4 Ohms n/a Nominal
Rated Output Power 150 Watts 145 1 input driven
THD@ Rated Power 0.08 % 1 22k filter
THD @ 1 Watt 0.1 % 0.5 22k filter
DC Offset 10 mV-DC 20 @ Speaker Outputs
Damping factor >100 DF 30...

SPEAKER CONNECTIONS
Connection Tips

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Dolby*Pro Logic*(Non-Digital) – Speaker Level

Use this installation method
for Dolby Pro Logic appli-
cations (not Dolby Digital,
DTS
®or other digital
processing), where the
receiver/processor does not
have a subwoofer output, or 
a volume-controlled preamp
(line-) level output:
Connect your receiver or
amplifier’ s front left and right
speaker terminals to the left
and right terminals on the
subwoofer that are marked
“High Level In.” Connect the
left and right terminals on the
subwoofer that are...

Dolby Pro Logic (Non-Digital) – Line Level

Use this installation method
for Dolby Pro Logic appli-
cations (not Dolby Digital, DTS
or other digital processing),
where the receiver/processor
is equipped with a subwoofer
output, or a volume-controlled
preamp (line-) level output: Use RCA-type patch cords 
to connect the line-level
subwoofer outputs on your
receiver or amplifier to the
line-level inputs on the
subwoofer. IMPORTANT: Do
not use the LFE input on the
subwoofer with DolbyPro Logic processors....

OPERATION

MIN        MAX
SubwooferLevel

MIN        MAX
SubwooferLevel

Move the Master Power
switch (marked  “Power ” 
¡
)
to the  “
•” (On) position to use
the subwoofer. The 
subwoofer will automatically
turn itself on or go into
standby (sleep) mode when
left in the standby mode
( “ Auto/On ” switch 

™
in the
“ Auto ” position). When your
receiver or amplifier is off, or is not sending program
material to the subwoofer, 
the subwoofer will be in
standby mode. When the sub-
woofer senses an audio...

If there is no sound from any
of the speakers:

• Check that receiver/amplifier
is on and a source is playing.
•  Check that the powered 
subwoofer is plugged in, and
itsPower switch 
¡
is
switched on to the  “
•”
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.
•  Review proper operation of
your receiver/amplifier.

If there is no sound coming
from one speaker:...

 
SUB150/160/180 EXPLODED VIEW 
 
 
 
 
 
 
Ref# Description  Part Number Qty 
     
1  SUB150/160/180 CABINET  NOT FOR SALE  1 
2  FOOT – MAIN PLASTIC BODY  (SCS150SI)   WI5447  4 
  “  (SCS160SI)   321-ABS-00008  4 
  “  (SCS180.6)   321-ABS-00008-0LA  4 
3  FOOT – RUBBER BOTTOM  (SCS150SI)   WI5448  4 
  “  (SCS160SI/180.6)   321-ABS-00009  4 
4  FOOT SCREW  T4*30L  06-T43005  4 
5 10” WOOFER  25MF12DZB-DW02 1 
6  AMPLIFIER/WOOFER  SCREWS  T4*20L  06-T4205012  15 
7  SUB150/160/180 AMPLIFIER  NOT FOR...

 
Test Set Up and Procedure 
 
 
 
Equipment needed: 
 
•   Function/signal generator/sweep generator 
•  Integrated Amplifier 
•  Multimeter 
•  Speaker cables 
 
General Unit Function (UUT = Unit Under Test) 
 
1)  From the signal generator, connect one line level (RCA) cable to the Subwoofer Line Level Input jacks L/R 
on the UUT. Use a Y-cable from a mono source if necessary to connect to both inputs. Do not connect to 
the single LFE input. 
2)  Turn on generator; adjust to  100mV, 50 Hz. 
3)  Plug...