JBL SUB-10 Service manual

Balboa™ Series

SUB10

Powered Subwoofer

Service Manual

JBL Consumer Products 250 Crossways Park Dr.

Woodbury, New York 11797 Rev0 10/2006

BALBOA series SUB10

- CONTENTS -

BASIC SPECIFICATIONS ……………. ……..…………..1 PACKING……..………………….….….…………..……...2 DETAILED SPECIFICATIONS ……….……..…………..3 CONNECTIONS………………………...……..…...…..…5 OPERATION ……..………………….……...…….….…...7 TEST SET-UP AND PROCEDURE….…………………..8 EXPLODED VIEW/PARTS LIST…………………………9 AMPLIFIER BLOCK DIAGRAM…………………………10 DETAILED TROUBLESHOOTING……………………..12 ELECTRICAL PARTS LIST ..……….……….……….…13 P.C . B. DRAWING S ……………………………………….17 IC/ T R ANS I S T O R PIN O U T S ..……..….…….….….….….23 SCHEMATICS……………………….……………………24

BALBOA SUB10 SPECIFICATIONS

Amplifier Power (RMS): 100 Watts Peak Dynamic Power *: 225 Watts Driver: 10" (254mm) Inputs: Line Level and LFE Crossover Frequency: Variable from 50Hz to 150Hz, 24 dB per octave Frequency Response: 30Hz – 150Hz Dimensions (H x W x D): 19-3/4" x 14-1/16" x 14-3/4"

(502mm x 357mm x 375mm)

Weight: 35 lb/16kg

JBL continually striv es to update and improve existi ng pr oduc ts, as well as create new ones. The specifications and details in this and related JB L publications are therefore subject to c hange without notic e.

* The Peak Dynamic Power is measured by recording the highest center-to-peak voltage measured across the output of a resistive load equal to mi nimum impedance of the transducer, using a 50Hz sine wave burst, 3 cycles on, 17 cycles off.

BALBOA series SUB10

Measured at amplifier board speaker out

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

BALBOA series SUB10

Balboa Sub 10 100W Powered Sub/ Plate Amp

LINE VOLTAGE

US 120VAC/60Hz Yes 108-132 Vrms

EU 230VAC/50-60Hz Yes 207-254 Vrms Normal Operation Normal operation, MOMS required

Parameter Specification Unit QA Test Limits Conditions Notes

Amp Section

Type (120V Model) AB AB Type (230V Model) G H Load Impedance (speaker) 4 Ohms

System average impedance 8.2 Ohms Rated Output Power 120V 100 Watts Rated Output Power 230V 105 Watts

Avgerage value - RMS Dynamic power

Dynamic power HP 134 Watts THD@ Rated Power 0.5 % THD @ 1 Watt 0.1 % DC Offset 10 mV-DC

Damping factor >150 DF

Input Sensitivity

Input Frequency 50 Hz Line Input (L&R) 15 mVrms LFE Input 9.5 mVrms System Gain-L and R inputs 42.27 dB

es/No Hi/Lo Line Unit Notes

N/A 120V System is Class AB N/A 230V System is Class G N/A Nominal

Reference

95 @ Nominal input voltage

100 @ Nominal input voltage

103 Watts

Reference @ Nominal input voltage

0.3 22K filter 50 @ Speaker Output

100

50 Nominal Freq.

±2dB To 1 Watt Single input driven 1 input driven ±2dB To 1 Watt LFE input driven only ±2dB Gain=130 Single input driven L or R

Normal Operation

Measured with AP using the ratio method, sweeping with an ext. amp 10 to 500 Hz

1 22K filter

Average on the operating BW from 10 to 500Hz

3/20 50 Hz Burst unit driven 6dB above the sensitivity to drive it into max power, measured value is the average of the 4 first consecutive peaks Highest RMS of the first 4 consecutive peaks

terminals, Output power 90 Watts THD <

0.1 %

Signal to Noise

SNR-A-Weighted 90 dBA SNR-unweighted 85 dBr SNR @ 1W-unweighted 65 dBr

Residual Noise Floor 1

Input Impedance

Line input L&R , LFE >10 K ohms

Filters

Low Pass (fixed or variable) Variable -Subsonic filter (HPF) Fixed Friend circuit Fixed

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

Features

LFE Input YES Phase Switch (yes/no) YES -Volume pot Taper (lin/log) LOG -LP Variable Crossover contr ATO YES

Input Configuration

Line In (L,R) L ,R -Line level in LFE LFE

Signal Sensing (ATO)

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

ATO Level Line Level in (L,

YES

1.5 mV

mVrms(max)

85 To Rated power A-Weighting filter 80 To Rated power 22KHz filter 60 To 1 Watt 22KHz filter

1.5

N/A Nominal over the audio BW Reference only

±2dB ±2dB ±2dB

N/A N/A

Functional BW Limited to 500 Hz, Functional Functional Functional Range 50-110 Hz Functional fs

Functional Functional Single connector

Functional Functional

Functional

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

2nd order variable + 2nd order fix, Range 50-110 Hz

RCA inputs: RED-WHT, L , R Summed to Mono

driven

BALBOA series SUB10

Parameter Specification Unit QA Test Limits Conditions Notes

ATO Turn-on time < 1 Sec

Auto Mute/ Turn-OFF Time 10 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

Efficienc

Stand-by Input Power 13 Watts Power Cons/Amps.@rated power 120V Model Power Cons/Amps.@rated power230V Model

Protection

Short Circuit Protection YES --

Thermal Protection 65 deg. C -DC Offset Protection YES --

Line Fuse Rating

120VAC 2.5 Amps 230VAC 1.25 Amps

192 / 1.89 Watts/Amps

208 / 1.1 Watts/Amps

Functional

Functional T before muting, after signal is removed Auto turn of time (T) must be 5 > 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

208 / 2.00 @ 120V-60 Hz (Nom.line voltage)

210 / 1.2 @ 230V-50 Hz (Nom.line voltage)

Functional Direct short at output

Functional @1/8 max unclipped Power Functional DC present at Speaker Out leads Relay or crowbar (for driver/fire protection)

Amp connected and AC on, then input signal applied

@ nom. line voltage Unit active, no signal applied (Green LED)

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

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

100 Watts @ 4 Ohms nominal line voltage

Temperature rise should not exceed 35K rise

™

∞

FUSE

T 2.5A L 250V

TYPE

~ 120V 60HZ

200 Watts

A Harman International®Company

BALBOA series SUB10

CONTROLS AND CONNECTIONS

Rear Panel

Subwoofer-Level Control

Crossover Adjustment

Phase Switch

LFE Input

Line-Level Inputs

Power Indicator LED

Power Switch

SUBWOOFER OR LFE OUTPUT

L R

BALBOA series SUB10

SUBWOOFER CONNECTIONS

Choose the Subwoofer Connection That Is Most Suitable for Your Receiver/Processor

If you have a Dolby®Digital or DTS®receiver/processor with a low-frequency-effects (LFE) or subwoofer output:

If your receiver/processor does not contain a Dolby Digital or DTS processor but has a subwoofer output:

NOTE: Some receivers have one subwoofer output. In that case, it is recommended that you use a Y connector (not included) to maximize performance.

BALBOA series SUB10

OPERATION

Power On

Plug your subwoofer’s AC cord into a wall outlet. Do not use the outlets on the back of the receiver.

Initially set the Subwoofer-Level Control

Turn on your sub by pressing the Power Switch

Turn on your entire audio system and start a CD or movie soundtrack at a moderate level.

Auto On/Standby

With the Power Switch ¶in the ON position, the LED §on the rear panel will remain lit in red or green to indicate the On/Standby mode of the subwoofer.

RED = STANDBY (no signal detected, amp off)

GREEN = ON (signal detected, amp on)

The subwoofer will automatically enter the Standby mode after approximately 10 minutes when no signal is detected from your system. The subwoofer will then power ON instantly when a signal is detected. During periods of normal use, the Power Switch can be left on. You may turn off the Power Switch ¶for extended periods of nonoperation, e.g., when you are away on vacation.

Adjust Level

Turn your Subwoofer-Level Control ¡up to the “5” position (halfway). If no sound emanates from the subwoofer, check the AC-line cord and input cables. Are the connectors on the cables making proper contact? Is the AC plug connected to a “live” receptacle? Has the Power Switch position? Once you have confirmed that the subwoofer is active, proceed by playing a CD, record or cassette. Use a selection that has ample bass information.

Set the overall volume control of the preamplifier or stereo to a comfortable level. Adjust the Subwoofer-Level Control you obtain a pleasing blend of bass. Bass response should not overpower the room but rather be adjusted so there is a harmonious blend across the entire musical range. Many users have a tendency to set the subwoofer volume too loud, adhering to the belief that a subwoofer is there to produce lots of bass. This is not entirely true. A subwoofer is there to enhance bass, extending the response of the entire system so the bass can be felt as well as heard. However, overall balance must be maintained or the music will not sound natural. An experienced listener will set the volume of the subwoofer so its impact on bass response is always there but never obtrusive.

to the “min” position.

on the rear panel.

been pressed to the “On”

until

Phase Control

The Phase Switch £ determines whether the subwoofer speaker’s piston-like action moves in and out with the main speakers (0˚), or opposite the main speakers (180˚). Proper phase adjustment depends on several variables such as room size, subwoofer placement and listener position. Adjust the phase switch to maximize bass output at the listening position.

Crossover Adjustments

The Crossover Adjustment Control ™ determines the highest frequency at which the subwoofer reproduces sounds. If your main speakers can comfortably reproduce some low-frequency sounds, set this control to a lower frequency setting, between 50Hz and 100Hz. This will concentrate the subwoofer’s efforts on the ultradeep bass sounds required by today’s films and music. If you are using smaller bookshelf speakers that do not extend to the lower bass frequencies, set the Crossover Adjustment Control to a higher setting, between 120Hz and 150Hz.

NNOOTTE

: This control will have no effect if the LFE Input ¢ is used. If

you have a Dolby Digital or DTS processor/receiver, the Low-Pass Frequency is set by the processor/receiver. Consult your owner’s manual to learn how to view or change this setting.

BALBOA series SUB10

BALBOA SUB10 Test Set Up and Procedure

SYSTEM AURAL SWEEP TEST Equipment needed:

• Function /si g nal ge nerator/sw ee p generator

• Integrated Amplifier

• Multimeter

• Speaker cables

General Unit Function (UUT = Unit Under Test)

Switches/knobs on the amplifier faceplate:

Low Pass Freq uency Adjus t ful l CW (150Hz) Phase switc h – ei th er posi tio n

1. From the signal generator, Connect both right and left line level inputs (RCA) – not the LFE jack - to signal generator and UUT. Use Y-cable if necessary from mono source.

2. On the amplifier, turn the LEVEL cont rol full Counterclockwise (Min).

3. Turn on generator, adj ust to 100mV, 50 Hz.

4. Plug in UUT; turn the power switch ON. Turn LEVEL control full Clo ckwise (Max).

5. LED should now be Green; immediate bass response should be heard and felt from rear port tube opening.

6. Turn off generator, turn LEVEL control fully Counterclockwise (Min), disconnect RCA cable.

Sweep Function

1. Follow steps 1-6 above, using a sweep generator as a signal source.

2. Sweep generator fr om 20H z t o 1kH z. Li s t en to th e cabinet and driv ers for any rattles, click s, buzzes or any other noi s es . If any unusual noises are hear d, remove woofer and test.

Driver Function (Woofer)

1. Remove woofer from cabinet; detach + and - wir e clips .

2. Check DC resistance of woofer; i t should be 3.3 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.

4. Sweep generator from 20Hz to 1kHz . Li sten to driver for an y ru bbing, buzzing , or other un usual nois es.

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