JBL SCS150SI Service Manual

Simply Cinema Series

SCS150SI

Surround Cinema Speakers

SERVICE MANUAL

JBL Consumer Products

250 Crossways Park Dr.

Woodbury, New York 11797 Rev0 11/2001

- CONTENTS -

BASIC SPECIFICATIONS……………….……….……………….1

DETAILED SPECIFICATIONS ……..…………………………..2

CONNECTIONS…………… …..……………...…………..……...3

OPERATION...………….…………………………….…………….6

BASIC TROUBLESHOOTING……..……….…………………….7

SUB150 EXPLODED VIEW……..……….……………………….8

SUB150 PCB DRAWINGS…………… ……..…………….……..9

SCS150SI PACKING/SATELLITE PARTS LIST……..….…….15

SUB150 ELECTRICAL PARTS LIST ……………....…….…….16

SUB150 SCHEMATICS …………………………………….…21

SCS150SI System

Frequency Response 30Hz – 20kHz (–6dB)

Satellites

Recommended Power

10 – 100 watts

Impedance

8 ohms nominal

Sensitivity

88dB @ 1 watt/1 meter

Tweeter

One 1/2" titanium laminate dome,
video-shielded

Midrange

Dual 3" drivers, video-shielded

Dimensions (H x W x D)

8-1/8" x 3-1/2" x 3-7/8"

(206mm x 89mm x 99mm)

Weight

2.65lb/1.2kg

Center

Recommended Power

10 – 100 watts

Impedance

8 ohms nominal

Sensitivity

88dB @ 1 watt/1 meter

Tweeter

One 1/2" titanium laminate dome,
video-shielded

Midrange

Dual 3" drivers, video-shielded

Dimensions (H x W x D)

3-1/2" x 8-1/8" x 3-7/8"
(89mm x 206mm x 99mm)

Weight

2.65lb/1.2kg

Subwoofer SUB150

Amplifier

150 watts RMS

Woofer

10" woofer, bass-reflex enclosure

Dimensions (H x W x D)

17-3/4" x 15-3/4" x 16-3/4"
(451mm x 400mm x 426mm)

Weight

35 lb/15.9kg

Occasional refinements may be made to existing products without notice but will always meet or exceed original
specifications unless otherwise stated

SUB150 150W Powered Sub/ Plate Amp

r

s

2mV@50Hz into Line Input w/ 1 ch

50mV@50Hz into Line Input w/ 1 ch

2

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
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

Input Sensitivity

Input Frequency 50 Hz 50 Nominal Freq. 1 input driven

Line Input (L&R) 250 mVrms ±2dB To Rated Power 1 input driven

LFE Input 145 mVrms ±2dB To Rated Power LFE input driven only

Speaker/Hi Level Input 2 Vrms ±2dB To Rated Power (-20 dB below Line In)...1 input driven

Signal to Noise

SNR-A-Weighted 100 dBA 85 rel. to rated power A-Weighting filter
SNR-unweighted 90 dBr 80 rel. to rated power 22k filter
SNR @ 1W-unweighted 60 dBr 55 rel. to 1W Output 22k filter

Residual Noise Floor 1 mVrms 2

Residual Noise Floor 1

Input Impedance

Line input L&R , LFE >15 K ohms n/a Nominal

Speaker/Hi Level Input 4.7 K ohms n/a Nominal

Filters

Left & Right Low Pass fixed Hz -- ±2dB

Slope & Q 4th dB/Octave n/a

LFE Low Pass fixed Hz -- ±2dB

Slope & Q 2nd dB/Octave n/a

Subsonic filter (HPF) Hz -- ±2dB

Slope & Q 2nd dB/Octave n/a

Limiter YES -- n/a

Features

LFE Input YES functional BW Limited to 500 Hz
Volume pot Taper (lin/log) log -- functional
ATO YES functional

Signal Sensing (ATO)

ATO test Frequency 50 Hz functional

ATO Line Level 2 mV functional

ATO Speaker level input 50 mV fucntional

ATO Turn-on time 5 ms functional
Auto Mute/ Turn-OFF Time 15 minutes functional T before muting, after signal is removed Auto turn of time (T) must be 10 > T <15

Power on Delay time 3 sec. functional AC Power Applied

Transients/Pops

ATO Transient 5 mV-peak 10 @ Speaker Outputs
Turn-on Transient 50 mV-peak 100 @ Speaker Outputs AC Line cycled from OFF to ON
Turn-off Transient 50 mV-peak 100 @ Speaker Outputs AC Line cycled from ON to OFF

Efficiency

Stand-by Input Power 14 Watts 16 @ nom. line voltage
Power Cons.@rated power 230 Watts 250 @ nom. line voltage 140 Watts @ 4 Ohms nominal line voltage

Protection

Short Circuit Protection YES -- functional Direct short at output

Thermal Protection 65 deg. C -- functional @1/8 max unclipped Power
DC Offset Protection YES -- functional DC present at Speaker Out leads Relay or crowbar (for driver/fire protection)
Line Fuse Rating

US Version 3.15 Amps Type-T or Slo Blo External fuse with UL/SEMKO rated holder

Specification Unit QA Test Limit

mVrms(max) 2

Volume @max, using RMS reading
DMM/VOM (or A/P)

Volume @max, w/ A/P Swept Bandpass
Measurement (Line freq.+ harmonics)

driven

driven
Amp connected and AC on, then input
signal applied

Conditions Notes

Measured at speaker terminals, Output
power 140 Watts THD 0.1 %

.

.

Maximum allowable input power under
nominal Input voltage and frequency, HOT
or COLD operation.

Temperature rise should not exceed 35K
rise

SPEAKER CONNECTIONS

Connection Tips

3

To use the binding-post

speaker terminals on the

subwoofer, unscrew the

colored collar until the pass

through hole in the center

post is visible under the

collar. Ins ert the bare end of

the wire through this hole;

then screw the c ollar down

until the connection is tight.

The hole in the c enter of

each collar is intended f or

use with banana-type

connect ors.

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

Use this installation method
for Dolby Pro Logic appli­cations (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 marked
“High Level Out” to the cor­responding terminals on the
back of your front left and
right speakers.

Connect your receiver or
amplifier’s center, left and
right surround-speaker
terminals to the corre­sponding terminals on the
back of your center, left and
right surround speakers.

Right Front

Right Surround

Left Front

Left Surround

Center

+ – + –

+ –

+ –

+ –

+ –

+ –

Left Front Center

+ –

Left Surround

Right Front

+ –

Right Surround

+ –

Subwoofer

Receiver

HIGH LEVEL

+ – – +

L R

OUT

IN

4

Dolby Pro Logic (Non-Digital) – Line Level

Use this installation method
for Dolby Pro Logic appli­cations (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 Dolby

Pro Logic processors. Note: If
your receiver or amplifier only
has one subwoofer output
jack, then you will need to use
a Y-connector (not included).
Plug the male end of the Y­connector into your receiver
or amplifier’s subwoofer
output jack, and connect each
of the two female ends to
separate RCA-type patch
cords. Finally, plug the RCA­type patch cords into the line­level inputs on the subwoofer.

Connect each speaker to
the corresponding speaker
terminals on your receiver
or amplifier.

Make sure your receiver or
processor is correctly
configured to indicate that the
subwoofer is “On.”

Note for advanced users: If
your receiver/processor has a
built-in low-pass crossover
filter for the subwoofer output,
you may use the LFE input to
bypass the subwoofer’s
internal crossover.

Use this installation method
for Dolby Digital, DTS or other
digital surround processors:

Use the line-level input jack
marked “LFE” for the Low­Frequency Effects channel.
Connect this jack to the LFE
output or subwoofer output
on your receiver or amplifier.
Connect each speaker to the
corresponding speaker

terminals on your receiver
or amplifier.

Make sure that you have
configured your surround­sound processor for
“Subwoofer On.” The front
left, front right, center and
rear speakers should all be
set to “Small.”

Dolby Digital or DTS (or Other Digital Surround Mode) Connection

LINE LEVEL IN

LFE INPUT

LFE OUT

L

R

SUBWOOFERRECEIVER

+ –

+ –

+ –

+ –

+ –

+ –

+ –

+ –+ –

+ –

Receiver

Subwoofer

Out

Left

Front

Left

Rear

Right
Front

Right

Rear

Subwoofer

R L

R

L

Center

Line­Level

In

Right Surround

Right Front

Left Surround

Left Front

Center

5

OPERATION

MIN MAX

Subwoofer

Level

MIN MAX

Subwoofer

Level

Move the Master Power
switch (marked “Power” ¡)
to the “•” (On) position to use
the subwoofer. The SUB150
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 sub­woofer senses an audio signal,
it will automatically turn itself
on. If the subwoofer does
not sense a signal after
approximately twenty minutes,
it will automatically go into
standby mode.

When the “Auto/On” switch
™ is switched to the “On”
position, the subwoofer will
remain on, whether or not
program material is playing.
If you will be away from
home for an extended period
of time, or if the subwoofer
will not be used, switch the
Master Power switch ¡ to
the Off position.

Volume

POWER

HIGH LEVEL

+ – – +

SUBWOOFER

LEVEL

OUT

IN

L R

LINE LEVEL IN

LFE

L

R

AUTO ON

MIN MAX

SUB 150

AC 120V~60Hz

250 Watts

3.15A/250V
TYPE T

£

¡

™

IMPORTANT: CONNECT STRIPED WIRE TO RED ( ) SPEAKER TERMINAL.

GREEN: ON
RED: STANDBY

+

AVIS : RISQUE DE CHOC ÉLECTRIQUE-NE PAS OUVRIR

WARNING: FOR CONTINUED
PROTECTION AGAINST RISK

OF FIRE, REPLACE ONLY WITH

SAME TYPE 3.15A, 250 VOLT FUSE

AVERTISSEMENT: UTILISEZ UN

FUSIBLE DE RECHANGE DE MEME

TYPE 3.15A, 250V

A Harman International Company

JBL, Incorporated

This area is designed to become quite warm

during normal operation

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,

DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.
AVERTISSEMENT: POUR PRÉVENIR LES RISQUES D'INCENDIE
OU DE CHOC ÉLECTRIQUE, ÉVITER D'EXPOSER CET APPAREIL
A LA PLUIE OU A L'HUMIDITÉ.

Volume can be adjusted
using the Subwoofer Level
Control £ (above), as shown
below.

6

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
its

Power switch ¡ is
switched on to the “•”
position.

• Check all wires and con­nections 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:

• Check the “Balance” control
on your receiver/amplifier.

• Check all wires and con­nections between receiver/
amplifier and speakers. Make
sure all wires are connected.
Make sure none of the
speaker wires are frayed,
cut or punctured.

• In Dolby Digital or DTS
modes, make sure that the
receiver/processor is
configured so that the speaker
in question is enabled.

• Turn off all electronics and
switch the speaker in question
with one of the other speakers

that is working correctly. Turn
everything back on, and
determine whether the
problem is in the same place,
i.e., the speaker that was
working previously now has
no sound and the speaker that
was not working now sounds
fine; or whether it has moved,
i.e., the speaker that was not
working still has no sound and
the speaker that was working
is still fine. If the problem is in
the same place, the source of
the problem is most likely with
your receiver or amplifier, and
you should consult the owner’s
manual for that product for
further information.

If the
problem has followed the
speaker, consult your dealer
for further assistance or, if
that is not possible, visit our
Web site at www.jbl.com for
further information.

If there is no sound from the
center speaker:

• Check all wires and
connections between
receiver/amplifier and
speaker. Make sure all wires
are connected. Make sure
none of the speaker wires are
frayed, cut or punctured.

• If your receiver/processor is
set in Dolby Pro Logic mode,
make sure the center speaker

is not in phantom mode.

• If your receiver/processor
is set in Dolby Digital or DTS
mode, make sure the
receiver/processor is con­figured so that the center
speaker is enabled.

If the system plays at low
volumes but shuts off as
volume is increased:

• Check all wires and con­nections 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.

If there is low (or no) bass
output:

• Make sure the connections
to the left and right “Speaker
Inputs” have the correct
polarity (+ and –).

• Make sure the subwoofer
is plugged into an active
electrical outlet.

• Make sure the powered
subwoofer is plugged in

, and

its

Power switch ¡ is
switched on to the “•”
position.

TROUBLESHOOTING

7

• In Dolby Digital or DTS
modes, make sure your
receiver/processor is
configured so that the
subwoofer and LFE output
are enabled.