SCS 135S Sub (serv.man2) - JBL Audio Service Manual (repair manual)

Cinema ProPack 600

Amplifier/Subwoofer

PRELIMINARY

SERVICE MANUAL 

JBL Consumer Products

250 Crossways Park Dr.

Woodbury, New York   11797

EU REV A & B

BASIC SPECIFICATIONS……………….……….……………….1
DETAILED SPECIFICATIONS ……..…………………………..2
OPERATION ………….…………………………….…………….3
EXPLODED VIEW..………………………..……………….……...4
TEST SET-UP AND PROCEDURE……..……………………….5
PCB DRAWINGS…………… …..……………...………….……...6
ELECTRICAL PARTS LIST …………… …..….………….……...8
MECHANICAL PARTS LIST……………... .…………………….10
SCHEMATICS ………..……………………………………………11

Floor-firing, bass-reflex ported enclosure

8" cone

100W Continuous RMS power
@ 0.8% THD, 20Hz to 100Hz

2V p-p/47k ohms

Width: 13 inches (330mm)
Height: 15 inches (381mm)
Depth: 14 inches (356mm)

30 lb/13.6kg

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

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EU 230

vac/50Hz Yes 108-132 Vrms Normal Operation

Yes

90-110

Vrms

Normal Operation

Amp Section
Type (Class AB, D, other)

AB   AB

n/a

External Sink required for Class AB

Load Impedance (speaker)

4 Ohms

n/a

Nominal

Z-curve required

Rated Output Power

100 Watts

90

1 input driven

THD@ Rated Power

0.08 %

0.3

22k filter

THD @ 1 Watt

0.1 %

0.5

22k filter

DC Offset

10 mV-DC

20

@ Speaker Outputs

Damping factor

>75 DF

50

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

Input Frequency

50 Hz

50

Nominal Freq.

1 input driven

LFE Input

550 mVrms

±2dB

To Rated Power

LFE input

Signal to Noise
SNR-A-Weighted

100 dBA

85

rel. to rated power

A-Weighting filter

SNR-unweighted

85 dBr

85

rel. to rated power

22k filter

SNR @ 1W-unweighted

65 dBr

60

rel. to 1W Output

22k filter

Residual Noise Floor

1 mVrms

1.5

Using RMS reading DMM/VOM (or A/P)

LFE Input termintated with 600 Ohms

Residual Noise Floor

1

mVrms(max)

1.5

UsingA/P Swept Bandpass Measurement 
(Line freq.+ harmonics)

Line input L&R , LFE

>15 K ohms

n/a

Nominal

Filters
Low Pass (fixed or variable)

fixed

--

±2dB

Slope & Q

dB/Octave

n/a

Subsonic filter (HPF)

Hz

±2dB

Slope & Q

dB/Octave

n/a

Limiter (yes/no)

YES

--

n/a

Limiter dirotrytion should not exceed 5% 
when input is overloaded by 3 times its input 
sensistivity

Features
LFE Input

YES

functional 

BW Limited to 500 Hz

ATO

YES

functional 

Signal Sensing (ATO)
Auto-Turn-On (yes/no)

YES

--

functional

ATO Input Frequency

50 Hz

functional

ATO Level

2 mV

functional

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

ATO Turn-on time

5 ms

functional

Amp connected and AC on, then input 
signal applied

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

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

Stand-by Input Power

13 Watts

15

@ nom. line voltage

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

Power Cons.@rated power

185 Watts

195

@ nom. line voltage

100 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 

Temperature rise should not exceed 35K rise

DC Offset Protection

YES

--

functional

DC present at Speaker Out leads

Relay or crowbar (for driver/fire protection)

Line Fuse Rating

2.5 Amps

2.5

Type-T or Slo Blo

External fuse with UL/SEMKO rated holder

2

LFE Input: Connect to LFE/Subwoofer

Output on rear panel of DCR600 receiver
using the single-lead RCA cable with brown
connectors.

LED: Lights green when a low-frequency

signal is present and the subwoofer is playing.
Lights red when no low-frequency audio signal
is present to indicate that the subwoofer is
plugged in, powered on and in the Standby
mode.

Power Switch: Turn the power switch to

the “

•

” (dot) position to power the unit on. The

SUB135S  subwoofer will automatically turn
itself on and go into Standby (Sleep) mode
when left in the On position. When your
DCR600 is off, or is not sending program materi-
al 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 automati-
cally go into Standby mode. If you will be away
from home for an extended period of time, or if

the subwoofer will not be used, turn this switch
off to conserve electricity and for safety.

AC Power Cord: Plug the power cord into

an unswitched outlet.

LFE

GREEN: ON
RED: STAND-BY

RISK OF ELECTRIC SHOCK

DO NOT OPEN

TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, 

DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE."

"AVERTISSEMENT: POUR PR VENIR LES RISQUES D’INCENDIE OU 
DE CHOC  LECTRIQUE,  VITER D’EXPOSER CET APPAREIL A LA 
PLUIE OU A L’HUMIDIT .

 "

FOR CONTINUED 

PROTECTION AGAINST RISK 
OR FIRE, REPLACE ONLY WITH 
SAME TYPE 2.5A, 250 VOLT 

"AVERTISSEMENT: UTILISEZ UN 
FUSIBLE DE RECHANGE DE MEME 
TYPE 2.5A, 250V"

NRTL/C

CSA 22-2 No.1

UL 1492

AVIS: RISQUE DE CHOC ELECTRIQUE-NE PAS OUVRIR

POWER

T1.25A/250V

TYPE T

200 Watts

JBL, Incorporated

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