JBL SUB-500 Service manual

Surround Cinema

SUB500

Amplifier/Subwoofer

SERVICE MANUAL

JBL Consumer Products 250 Crossways Park Dr.

Woodbury, New York 11797 Released 2007 Rev0 6/2007 Discontinued XXXX

Note: The SUB500 is part of the SCS500. 5 system

Satellite loudspeakers SCS500SAT: order JBL part# SCS500BK SAT-E Center channel SCS500CEN: order JBL part# SCS500BK CEN-E

- CONTENTS -

BASIC SPECI FI C ATI ONS……………….….….….….…………….1 DETAILED SPECIFICATIONS ……..…………….……………..2 PACKAGING/ACCESSORIES……..…………….………………..4 CONNECTIONS..………………………..………….…….………...5 OPERATION ………….……………………………..…………….6 BASIC TROUBLESHOOTING…..…………….….….…….……...6 TEST SET-UP AND PROCEDURE……………………………….7 EXPLODED VIEW/PARTS LIST…………………………………..8

BLOCK DIAGRAM………………….…………………………........9

PCB DRAWINGS………………..………………………………...10 120V ELECTRICAL PARTS LIST ………………..……………..12 230V ELECTRICAL PARTS LIST …………………..…………..15

INTEGRATED CIRCUIT/TRANSISTOR PINOUTS.................18

120V SCHEMATICS.………..……………….….………. ………19 230V SC H EMATICS.………..……………….…….……. ………22

SUB500 BASIC SPECIFICATIONS

Amplifier Output 150 Watts RMS Frequency Response 30Hz – 120Hz (–6dB) Woofer 10" (254mm) Enclosure Bass-reflex Dimensions (H x W x D) 20" x 13-3/4" x 15-3/4" (508mm x 349mm x 400mm) (including feet) Weight 35 lb (15.9kg)

Occasional r efinements may be made to ex isting products without notic e but will always meet or exceed original specifications unl ess otherwise stated

SUB500 (SCS500.5 Subwoofer)

JBL SUB 500 150W Powered Sub/ Plate Amp

LINE VOLTAGE Yes/No Hi/Lo Line Unit Notes

Parameter Specification Unit Amp Section

Type (Class AB, D, other) D D Load Impedance (speaker) 4 Ohms Rated Output Power 150 Watts THD@ Rated Power 0.5 % THD @ 1 Watt 0.1 % DC Offset 10 mV-DC

Damping factor >100 DF

Input Sensitivity

Signal to Noise

SNR-A-Weighted 100 dBA SNR-unweighted 90 dBr SNR @ 1W-unweighted 60 dBr

Residual Noise Floor 1 mVrms

Residual Noise Floor 1

US 120VAC/60Hz Yes 108-132 Vrms

Asia 100VAC/50Hz Yes 90-110 Vrms

EU 230VAC/50-60Hz Yes 207-264 Vrms Normal Operation Normal operation, MOMS required

QA Test

Limits Conditions Notes

N/A N/A Nominal 140 1 input driven

0.3 22KHz filter

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

LFE Input 145 mVrms

Speaker/Hi Level Input 2.5 Vrms

mVrms(max)

±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

Normal Operation Normal Operation

1 22KHz filter

50 @ Speaker Outputs

50 Nominal Freq. 1 input driven

85 rel. to rated power A-Weighting filter 80 rel. to rated power 22KHz filter 55 rel. to 1W Output 22KHz filter

Volume @max, using RMS reading

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

harmonics)

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

Input Impedance

Line input L&R , LFE >10 K ohms

Speaker/Hi Level Input 4.7 K ohms

Filters

Left & Right Low Pass fixed Hz --

LFE Low Pass fixed Hz --

Subsonic filter (HPF) Hz --

Limiter (yes/no) YES -THD at Max. Output Power N/A --

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 Spkr Out: Level out (L,R)Hi

Signal Sensing (ATO)

ATO test Frequency 50 Hz

ATO Line Level 2 mV

ATO Speaker level input 50 mV

ATO Turn-on time 5 ms

Auto Mute/ Turn-OFF Time 15 minutes

Slope & Q 4th dB/Octave

Slope & Q 2nd dB/Octave

(L,R)

L,R -L,R

N/A Nominal N/A Nominal

±2dB

N/A

±2dB

N/A

±2dB

N/A

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 Direct by pass from Speaker in

functional

fucntional

functional

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

50mV@50Hz into Line Input w/ 1 ch. driven Amp connected and AC on, then input signal applied T before muting, after signal is removed Auto turn of time (T) must be 10 > T <15

SUB500 (SCS500.5 Subwoofer)

Parameter Specification Unit

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 14 Watts Power Cons.@rated power 250 Watts

Protection

Short Circuit Protection YES --

Thermal Protection 65 deg. C --

DC Offset Protection YES -Line Fuse Rating

US Version 2.5 Amps

EU Version 1.6 Amps

QA Test

Limits Conditions Notes

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

Maximum allowable input power under

15 @ nom. line voltage 260 @ nom. line voltage

functional Direct short at output

functional @1/8 max unclipped Power

functional DC present at Speaker Out leads

Type-T or Slo Blo

nominal Input voltage and frequency, HOT or COLD operation. 150 Watts @ 4 Ohms nominal line voltage

Temperature rise should not exceed 35K rise Relay or crowbar (for driver/fire protection)

External fuse with UL/SEMKO rated holder External fuse with UL/SEMKO rated holder

SUB500 (SCS500.5 Subwoofer)

LINE

LEVEL

LFE

LFE OUT

SUBWOOFER

RECEIVER

SUB500 (SCS500.5 Subwoofer)

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 Low-

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 volumecontrolled preamp (line-) level output:

Frequency 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 surround sound processor for “Sub-

your receiver for 5.1-channel operation, as appropriate. The front left, front right, center and surround speakers should all be set to “Small.” If your receiver allows you to set the crossover frequency between the subwoofer and the main speakers, select 100Hz or the setting that is the closest frequency below it.

woofer On.” Also configure

(NON-DIGITAL) –LINE LEVEL

Use RCA-type interconnects 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 Y-connector into your receiver or amplifier’s subwoofer output jack, and connect each of the two female ends to separate RCA-type interconnects. Finally, plug the RCA-type interconnects 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.

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 “Speaker Level In.” Connect the left and right terminals on the subwoofer that are marked “Speaker Level Out” to the corresponding terminals on the back of your front left and right speakers.

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

RISK OF ELECTRIC SH O CK DO NOT OPEN

CAUTION

RISK OF ELECTRIC SH O CK DO NOT OPEN

CAUTION

RISK OF ELECTRIC SH O CK DO NOT OPEN

∫

SUB500 (SCS500.5 Subwoofer)

Move the Master Power switch (marked “Power” å) to the “•” (On) position to use the subwoofer. The SUB500 subwoofer will automatically turn on or go into standby (sleep) mode when left in the auto mode (“Auto/On” switch “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 red). When the sub

woofer senses an audio sig-

nal,

it will automatically turn on (LED will be green). If the subwoofer does not sense a signal after

approximately 20 minutes, it will automatically go into standby mode.

When the “Auto/On” switch ç is switched to the “On” position, the subwoofer will remain on, whether or not program material is playing.

VOLUME

ç in the

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

å to the Off position.

Volume may be adjusted using the Subwoofer Level control

∫ as shown.

TROUBLESHOOTINGOPERATION

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 å is

switched on (“•” 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, or touching each other.

• Review proper operation of your receiver/amplifier.

If there is no sound coming from one speaker:

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

• 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 are working correctly. Turn everything back on, and determine whether the problem has followed the speaker, or has remained in the same channel. If the problem is in the same channel, 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 www.jbl.com.

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, or touching each other.

• 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 one of the Dolby Digital or DTS sure the receiver/

modes, make

processor is configured so that the center speaker is enabled.

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

• 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 turned on (Power switch

å in the “

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

If there is no sound from the surround speakers:

• 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 whether 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.

, and is

” position).

•

SUB500 (SCS500.5 Subwoofer)

SUB500 TEST PROCEDURE

SYSTEM AURAL SWEEP TEST Equipment needed:

• Function/signal generator /sweep gener ator

• Integrated Amplifier

• Multimeter

• Speaker cables

General Unit Function (UUT = Unit Under Test)

Auto-On switch – either positi on

1) From the signal generator, Connect both ri ght and left line l evel inputs (RCA) to signal generator and UU T. Use Y-cable if necessary from mono sour ce. Do not use the LFE jack.

2) On the front of the unit, turn the LEVEL control full countercloc kwise (MIN).

3) Turn on generator, adjust to 100mV, 50 Hz.

4) Plug in UUT; turn the power switch ON. Turn LEVEL control full clockwise (MAX)

5) LED should now be Green; imm edi ate bass res ponse should be hear d and felt from por t tube openi ng.

6) Turn off generator, turn LEVEL control fully countercloc kwise (MIN) , disconnect RC A cable.

7) Connect one pair of speaker cables to one pai r Speaker Level input termi nals on UUT . Cables should be connected to an integrated ampli fier fed by the si gnal generator .

8) Turn on generator and adj ust so that speaker l evel input at the amplifier is 2.0V, 50 Hz.

9) Turn LEVEL control full clockwise (MAX)

10) Green LED shoul d light, immedi ate bass r esponse should be hear d and felt from the por t tube openi ng.

Sweep Function

1) Follow steps 7-10 above, usi ng a sweep gener ator as a signal sourc e.

2) Sweep generator from 20Hz to 1k Hz. Listen to the cabinet and dri v ers for any rattles, clicks, buz zes or any other noises. If any unusual noises ar e heard, remove woofer and test.

Driver Function (Woofer)

1) Remove woofer from c abinet; detach + and - wire clips.

2) Check DC resistance of woofer; it s hould be 3.4 o hms±10%.

3) Connect a pair of speaker cables to driver terminal s. Cabl es should be c onnected to an i ntegr ated am plifier fed by a signal generator. T urn on generator and adjust so that speaker level output is 5.0V.

4) Sweep generator from 20Hz to 1k Hz. Listen to driver for any r ubbi ng, buzzing, or other unusual noises.

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