JBL SUB-135-S Service manual

Cinema ProPack 600

EU REV A & B

SUB135S

Amplifier/Subwoofer

PRELIMINARY

SERVICE MANUAL

JBL Consumer Products

250 Crossways Park Dr.

Woodbury, New York 11797

Note: The SUB135S is part of the SCS135S system, which is part

1

of the JBL Cinema Propack 600 system.

Satellite loudspeakers 135SAT are replacement-only; order JBL
part# SAT135.

- CONTENTS -

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

BASIC SPECIFICATIONS

SUB135S Subwoofer

Configuration: Floor-firing, bass-reflex ported enclosure

Woofer: 8" cone

Amplifier Power output: 100W Continuous RMS power

@ 0.8% THD, 20Hz to 100Hz

LFE Input Voltage/Impedance: 2V p-p/47k ohms

Dimensions: Width: 13 inches (330mm)

Height: 15 inches (381mm)
Depth: 14 inches (356mm)

Weight: 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

SUB135S 100W Powered Amplifier

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A

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LINE VOLTAGE Yes/No Hi/Lo Line Unit

Parameter Specification Unit QA Test Limits Conditions Notes
Amp Section

Type (Class AB, D, other) AB AB
Load Impedance (speaker) 4 Ohms
Rated Output Power 100 Watts
THD@ Rated Power 0.08 %
THD @ 1 Watt 0.1 %
DC Offset 10 mV-DC

Damping factor >75 DF

Input Sensitivity

Signal to Noise

SNR-A-Weighted 100 dBA
SNR-unweighted 85 dBr
SNR @ 1W-unweighted 65 dBr

Residual Noise Floor 1 mVrms

Residual Noise Floor 1 mVrms(max)

Input Impedance

Filters

Low Pass (fixed or variable) fixed --

Subsonic filter (HPF) Hz

Limiter (yes/no)

Features

LFE Input YES
ATO YES

Signal Sensing (ATO)

Auto-Turn-On (yes/no) YES --

ATO Input Frequency 50 Hz

EU 230vac/50Hz Yes 108-132 Vrms

Asia 100vac/50Hz Yes 90-110 Vrms

n/a External Sink required for Class A
n/a Nominal Z-curve required

90 1 input driven

0.3 22k filte

0.5 22k filte
20 @ Speaker Output

50

Input Frequency 50 Hz

LFE Input 550 mVrms

Line input L&R , LFE >15 K ohms

Slope & Q dB/Octave

Slope & Q dB/Octave

YES --

50 Nominal Freq. 1 input driven

±2dB To Rated Powe

85 rel. to rated powe
85 rel. to rated powe
60 rel. to 1W Outpu

1.5 Using RMS reading DMM/VOM (or A/P) LFE Input termintated with 600 Ohms

1.5

n/a Nominal

±2dB

n/a

±2dB

n/a

n/a

functional BW Limited to 500 Hz
functional

functional

functional

Normal Operatio
Normal Operatio

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

Notes

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

LFE input

-Weighting filter
22k filte
22k filte

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

ATO Level 2 mV

ATO Turn-on time 5 ms
Auto Mute/ Turn-OFF Time 15 minutes

Power on Delay time 3 sec.

Transients/Pops

ATO Transient 5 mV-peak
Turn-on Transient 50 mV-peak
Turn-off Transient 50 mV-peak

Efficiency

Stand-by Input Power 13 Watts
Power Cons.@rated power 185 Watts

Protection

Short Circuit Protection YES --

Thermal Protection 65 deg. C -­DC Offset Protection YES -­Line Fuse Rating 2.5 Amps

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

functional
functional T before muting, after signal is remove

functional

10 @ Speaker Output
100 @ Speaker Output
100 @ Speaker Output

15 @ nom. line voltage
195 @ nom. line voltag

functional Direct short at outpu

functional @1/8 max unclipped Power Temperature rise should not exceed 35K rise
functional DC present at Speaker Out lead

2.5 Type-T or Slo Bl

mp connected and AC on, then input

signal applied

uto turn of time (T) must be 10 > T <1

C Power Applie

C Line cycled from OFF to O
C Line cycled from ON to OF

Maximum allowable input power under
nominal Input voltage and frequency, HOT or
COLD operation.
100 Watts @ 4 Ohms nominal line voltage

Relay or crowbar (for driver/fire protection
External fuse with UL/SEMKO rated holde

Operating the SUB135S Subwoofer

4

3

2

1

LFE

GREEN: ON
RED: STAND-BY

SUB135S

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

"WARNING: 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

FUSE

T1.25A/250V

TYPE T

AC 230V~50Hz

200 Watts

This area is designed to become quite warm

during normal operation

JBL, Incorporated

1 2

3

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LFE Input: Connect to LFE/Subwoofer

Outputon 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 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. 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.

Num Description Part # Quantity

4

1 Cabinet Not for Sale 1
2 Port Tube Not for Sale 1
3 Main Foot WI5447 4

Rubber pad for Foot WI5448
4 Screw 4
5 8” Woofer 20MF10DAG-DW02-01 1
6 Screw 18
7 Amplifier Assembly Not for Sale 1

SUB135S Test Set Up and Procedure

5

SYSTEM AURAL SWEEP TEST
Equipment needed:

• Function/signal generator/sweep generator

• Integrated Amplifier

• Multimeter

General Unit Function (UUT = Unit Under Test)

1. From the signal generator (set initially at 0 volts), connect one line level (RCA) cable to the SUB135S LFE
jack on the UUT.

2. Plug in the power cord; turn the power switch ON. LED should be Red.

3. Turn up the generator and adjust to 300mV, 40 Hz. LED should now be Green.

4. Immediate bass response should be heard and felt from port tube opening.

Sweep Function

1. Follow steps 1-4 above, using a sweep generator as a signal source.

2. Sweep generator from 20Hz to 1kHz. Listen to the cabinet and drivers for any rattles, clicks, buzzes or

any other noises. If any unusual noises are heard, remove woofer and test.

Driver Function (Woofer)

1. Remove woofer from cabinet; detach the + and - wire clips.

2. Check DC resistance of woofer; it should be 3.4 ohms ±10%.

3. Connect a pair of speaker cables to driver terminals. Cables should be connected to an integrated

amplifier fed by a signal generator. Turn on generator and adjust so that speaker level output is 5.0V.

5. Sweep generator from 20Hz to 1kHz. Listen to driver for any rubbing, buzzing, or other unusual noises.

Caution: take care to replace the + and - wire clips on the correct terminals, as they are the same size. Red wire
should connect to the red dot on the terminal.