JBL SCS135, SCS135SI, SCS136SI, SCS145.5S Service Manual

Simply Cinema Surround Cinema

Models: SCS135

SCS135SI SCS136SI SCS145.5S

Home Theater Speaker Systems

SERVICE MANUAL

JBL Incorporated

250 Crossways Park Dr.

Woodbury, New York 11797 REV 6 12/2004

SCS135/SCS135SI/SCS136SI/SCS145.5S

TABLE OF CONTENTS

BASIC SYSTEM SPECIFICATIONS……………….………………..2 DETAILED SPECIFICATIONS ………………………………………3

CONNECTIONS . . . . . . . . . . . .. . …………. . . . . . . . . . . . . . . . . .4

OPERATION . . . . . . . . . . . .. . . . . . . ……………. . . . . . . . . . . . . .6

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

MECHANICAL/PACKAGING PARTS LIST…………………………8

DETAILED EXPLODED VIEW.......................................................9

TEST SET UP AND PROCEDURE . . . .. . . . . . . . . . . . . . . . . . . .10

BLOCK DIAGRAM. . . . . . . . .. . . . . . . ……….. . . . . . . . . .. . . . . .11

ELECTRICAL PARTS LIST . . . . . .. . . . . . . . . . . . . . . . . . . . . . . .12

INTEGRATED CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . . . . . . .15

PRINTED CIRCUIT BOARDS . . . . . .. . . . . . . . . . . . . . . . . ... . . .16

SCHEMATICS . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . ….. . . .20

WIRING DIAGRAM. . . . . . . . .. . . . . . . ……….. . . . . . . . . .. . . . . 22

PACKAGING . . . . . ……………………….……………….. . . . . . . .23

SCS135/SCS135SI/SCS136SI/SCS145.5S

Specifications

SCS135/SCS135SI/SCS136SI/SCS145.5S SYSTEMS

Frequency Response 35Hz - 20kHz (-6dB)

Satellites

Recommended Power 10 - 100 watts Impedance 8 ohms nominal Sensitivity 86dB @ 1 watt/1 meter Tweeter One 1/2" (13mm) titanium-laminate dome, video-shielded Midrange One 3" (76mm) driver, video-shielded Dimensions (H x W x D) 4-3/8" x 3-3/16" x 3-3/4" (111mm x 81mm x 95mm) Weight 1.1lb/0.5kg

Center Channel

Recommended Power 10 - 50 watts Impedance 8 ohms nominal Sensitivity 86dB @ 1 watt/1 meter Tweeter One 1/2" (13mm) titanium-laminate dome, video-shielded Midrange Dual 3" (76mm) drivers, video-shielded Dimensions (H x W x D) 3-1/4" x 7-5/8" x 3-3/4" (83mm x 194mm x 95mm) Weight 1.89 lb/0.86kg

Subwoofer

Power: 100 watts RMS

8" (203mm) woofer, bass-reflex enclosure

Dimensions (H x W x D) 15" x 13" x 14" (381mm x 330mm x 356mm) Weight 30 lb/13.6kg

Refinements may be made on occasion to existing products without notice, but will always meet or exceed original specifications unless otherwise stated.

Simply Cinema is a registered trademark of JBL, Incorporated.

SCS135/SCS135SI/SCS136SI/SCS145.5S

SUB135/136/145.5 Amplifier 100W Powered Sub/ Plate Amp

LINE VOLTAGE Yes/No Hi/Lo Line Unit Notes

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 >100 DF

Input Sensitivit

Signal to Noise

SNR-A-Weighted 100 dBA SNR-unweighted 80 dBr SNR @ 1W-unweighted 60 dBr

Residual Noise Floor 1.5 mVrms

US 120vac/60Hz Yes 108-132 Vrms

Asia 100vac/50Hz Yes 90-110 Vrms

Input Frequency 50 Hz Line Input (L&R) 250 mVrms

LFE Input 135 mVrms

Speaker/Hi Level Input 2.5 Vrms

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

95 1 input driven

0.3 22k filter

0.5 22k filter 20 @ Speaker Outputs

50 Nominal Freq. 1 input driven

±2dB To Rated Power 1 input driven ±2dB To Rated Power LFE input driven only ±2dB To Rated Power (-20 dB below Line In)...1 input driven

90 rel. to rated power A-Weighting filter 75 rel. to rated power 22k filter 55 rel. to 1W Output 22k filter

2.5

Normal Operation Normal Operation

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

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

Residual Noise Floor 1

Input Impedance

Line input L&R , LFE >15 K ohms

Speaker/Hi Level Input 4.7 K ohms

Filters

Low Pass (fixed or variable) fixed --

Subsonic filter (HPF) Hz

r (yes/no) YES --

Limite Features

LFE Input YES Volume pot Taper (lin/log) log -ATO YES

Input Configuration

Line In (L,R) L ,R -Line level in LFE LFE Spkr/Hi Level In

Signal Sensing (ATO

Auto-Turn-On (yes/no) YES -ATO Input Frequency 50 Hz ATO Level 2 mV

ATO Turn-on time 5 ms

Auto Mute/ Turn-OFF Time 15 minutes

Power on Delay tim Transients/Pops

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

Efficienc

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 --

Slope & Q dB/Octave

(L,R)

)

e 3 sec.

mVrms(max)

L,R --

n/a Nominal n/a Nominal

±2dB

n/a

±2dB

n/a n/a

functional BW Limited to 500 Hz functional functional

functional RCA inputs: L , R Summed to Mono functional functional L R Summed to Mono

functional functional functional

functional AC on, signal applied

functional T before muting, after signal is removed Auto turn of time (T) must be 10 > T <15 functional AC Power Applied

10 @ Speaker Outputs

100 @ Speaker Outputs AC Line cycled from OFF to ON 100 @ Speaker Outputs AC Line cycled from ON to OFF

15 @ nom. line voltage Maximum allowable input power.

195 @ nom. line voltage

functional Direct short at output functional @1/8 max unclipped Power rise functional DC present at Speaker Out leads Relay or crowbar (for driver/fire protection)

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

driven

100 Watts @ 4 Ohms nominal line voltage

Line Fuse Rating 2.5 Amps

2.5 Type-T or Slo Blo External fuse with UL/SEMKO rated holder

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

SCS135/SCS135SI/SCS136SI/SCS145.5S

Connections

SPEAKER CONNECTIONS

Connection Tips

Pro Logic*(Non-Digital) – Speaker Level

Dolby

Use this installation method for Dolby Pro Logic applications (not Dolby Digital,

or other digital process-

DTS ing), 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 corre-sponding terminals on the back of your center, left and right surround speakers.

Separate and strip the ends of the speaker wire as shown. Speakers and electronics terminals have corresponding (+) and (–) terminals. Most manu-facturers of speakers and electronics, including JBL, use red to denote the (+) terminal and black for the (–) terminal.

The (+) lead of the speaker wire is noted with a stripe. It is important to connect both speakers identically: (+) on the speaker to (+) on the

amplifier and (–) on the speaker to (–) on the amplifier. Wiring “out of phase” results in thin sound, weak bass and a poor stereo image.

With the advent of multichannel surround-sound systems, connecting all of the speakers in your system with the correct polarity remains equally important in order to preserve the proper ambience and directionality of the program material.

LINE LEVEL IN

LFE INPUT

LFE OUT

SUBWOOFERRECEIVER

+ –

+ –+ –

+ –

Receiver

Subwoofer

Out

Left

Front

Left

Rear

Right Front

Right

Rear

Subwoofer

R L

Center

LineLevel

Right Surround

Right Front

Left Surround

Left Front

Center

SCS135/SCS135SI/SCS136SI/SCS145.5S

Connections

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 Yconnector (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 RCA-type patch cords into the line-level inputs on the subwoofer.

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

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

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 termi-

nals on your receiver or amplifier.

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

MIN MAX

Subwoofer

Level

MIN MAX

Subwoofer

Level

VOLUME

Volume may be adjusted using the Subwoofer Level control

£ as shown.

SCS135/SCS135SI/SCS136SI/SCS145.5S

OPERATION

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

HIGH LEVEL

+ – – +

L R

OUT

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

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

LINE LEVEL IN

LFE

™ 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 (LED will be

SUBWOOFER

LEVEL

MIN MAX

AC 120V~60Hz

woofer

it will

red). When the sub senses an audio signal,

AUTO ON

GREEN: ON RED: STANDBY

POWER

automatically turn on (LED will be green). If the subwoofer does not sense a signal after approximately twenty minutes, it will automatically go back 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.

SCS135/SCS135SI/SCS136SI/SCS145.5S

TROUBLESHOOTING

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, its Power switch ¡ is switched on to the “•” position, and the “Auto/On” switch ™ is either in the “On” or “Auto” 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.

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 con-figured 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 is either in the “On” or “Auto” position.

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

If there is no sound from the surround speakers:

• 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 and its surround-sound features.

• Make sure the movie or TV show you are watching is recorded in a surround-sound mode. If it is not, check to see if your receiver/ amplifier has other surround modes you may use.

• In Dolby Digital or DTS modes, make sure your receiver/processor is configured so that the surround speakers are enabled.

• Review the operation of your DVD player and the jacket of your DVD to make sure that the DVD features the desired Dolby Digital or DTS mode, and that you have properly selected that mode using both the DVD player’s menu and the DVD disc’s menu.

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