LG SJ3 User manual

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”

IN THIS MANUAL.

SERVICE MANUAL

Internal Use Only

JANUARY, 2017P/NO : AFN77558553

MODEL:

SJ3

(SJ3, SPJ4B-W)

MODEL: SJ3 (SJ3, SPJ4B-W)

2.1 ch Wireless Sound Bar

1-1

CONTENTS

SECTION 1 ........ GENERAL

SECTION 2 ........ CABINET & MAIN CHASSIS

SECTION 3 ........ ELECTRICAL

SECTION 4 ........ WIRELESS SUBWOOFER PART

1-2

SECTION 1

GENERAL

CONTENTS

ESD PRECAUTIONS......................................................................................................................................... 1-3

WIRELESS SUBWOOFER CONNECTION....................................................................................................... 1-4

HIDDEN KEY MODE ......................................................................................................................................... 1-5

ESS / EQ PROGRAM UPDATE GUIDE............................................................................................................ 1-6

SPECIFICATIONS ............................................................................................................................................. 1-7

1-3

ESD PRECAUTIONS

Electrostatically Sensitive Devices (ESD)

Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components

commonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated

circuits and some field-effect transistors and semiconductor chip components. The following techniques should

be used to help reduce the incidence of component damage caused by static electricity.

1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off

any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a

commercially available discharging wrist strap device, which should be removed for potential shock reasons

prior to applying power to the unit under test.

2. After removing an electrical assembly equipped with ESD devices, place the assembly on a conductive surface

such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.

3. Use only a grounded-tip soldering iron to solder or unsolder ESD devices.

4. Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static" can

generate electrical charges sufficient to damage ESD devices.

5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ESD

devices.

6. Do not remove a replacement ESD device from its protective package until immediately before you are

ready to install it. (Most replacement ESD devices are packaged with leads electrically shorted together by

conductive foam, aluminum foil or comparable conductive materials).

7. Immediately before removing the protective material from the leads of a replacement ESD device, touch the

protective material to the chassis or circuit assembly into which the device will by installed.

CAUTION : BE SURE NO POWER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALL OTHER

SAFETY PRECAUTIONS.

8. Minimize bodily motions when handing unpackaged replacement ESD devices. (Otherwise harmless motion

such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate

static electricity sufficient to damage an ESD device).

CAUTION. GRAPHIC SYMBOLS

THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, IS

INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED

“DANGEROUS VOLTAGE” THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF

ELECTRIC SHOCK.

THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE

SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE

LITERATURE.

1-4

WIRELESS SUBWOOFER CONNECTION

LED indicator of wireless subwoofer

LED Color Status

Green

(Blink)

Attempting to make connection.

Green The connection is completed.

Red

The wireless subwoofer

is in standby mode

or the connection is failed.

Off

(No display)

The power cord of wireless

subwoofer is disconnected.

Setting up the wireless subwoofer

for the ﬁrst time

1. Connect the power cord to the subwoofer and plug

the power cord into a power outlet.

2. Turn on the main unit : The sound bar and wireless

subwoofer will be automatically connected.

- Green LED on the rear of wireless subwoofer

turns on.

Manually pairing wireless subwoofer

When your connection is not completed, you can

check red LED on the wireless subwoofer and the

wireless subwoofer does not make sound. To solve

the problem, follow the steps below.

1. Press Pairing button on the rear of the wireless

subwoofer.

- The green LED on the rear of the wireless

subwoofer blinks quickly.

2. Turn on the main unit.

3. Pairing is completed.

- The green LED on the rear of the wireless

subwoofer turns on.

Note

•It takes a few seconds (and may take longer) for the

main unit and the subwoofer to communicate with

each other and make sounds.

•The closer the main unit and the subwoofer, the

better sound quality. It is recommended to install the

main unit and the subwoofer as close as possible

and avoid the cases below.

- There is a obstacle between the main unit and the

subwoofer.

- There is a device using same frequency with this

wireless connection such as a medical equipment,

a microwave or a wireless LAN device.

- Keep the sound bar and the subwoofer away from

the device (ex. wireless router, microwave oven,

etc.) over 1m to prevent wireless interference.

1-5

HIDDEN KEY MODE

HIDDEN MODE KEYS

Option EDIT Main unit 'VOL-' + Remote Control 'NIGHT ON'

Initialize Main unit 'VOL-' + Remote Control 'ASC'

Version Check Main unit 'VOL-' + Remote Control 'Play'

Clip Off

Main unit 'VOL-' + Remote Control 'Function'Clip On

Clip On Gain Monitoring

Wireless RF Change

Enter : Main unit 'VOL-' + Remote Control 'B.Skip'

Setting : B.Skip/F.Skip

Exit : Play/Pause"

BYPASS Sound Effect Main unit 'VOL-' + Remote Control 'AUTO POWER OFF'

APD Time Display Main unit 'VOL-' + Remote Control 'WOOFER LEVEL -'

APD On/Off Main unit 'VOL-' + Remote Control 'F.Skip'

Up Play/Pause

Down B.Skip

Right F.Skip

Left WOOFER LEVEL+

Enter AUTO POWER ON

Demo Mode (Play) Main unit 'Volume minimum state' + Remote Control 'function'

For 7seconds

Wireless Demo Mode Main unit 'VOL-' + Remote Control 'B.Skip'

TV Remocon On/Off Remote Control 'NIGHT OFF' + Remote Control '+' For 3seconds

BT Name Display Remote Control 'B.Skip' + Remote Control '+' For 2seconds

BT Lock Remote Control 'AUTO POWER OFF' + Remote Control '+'

For 2seconds

Wireless Factory Main unit 'Volume minimum state' + Remote Control 'MUTE'

For 3seconds

BT SIG Critiﬁcation Main unit 'VOL-' + Remote Control 'NIGHT OFF' For 3seconds

1-6

1. Preparation

- Remote control.

- Do format USB Memory to FAT32 File system.

- USB : Update ﬁle exist only in the USB Memory stick.

Ex ) SJ3 :

ESS E:\DSP_SJ3_*.rom (if USB driver is E:\)

EQ E:\EQ_PRG.BIN (if USB driver is E:\)

Wireless Tx E:\WIRELESS_TX.bin (if USB driver is E:\)

Wireless Rx E:\WIRELESS_RX.bin (if USB driver is E:\)

2. Update

1) Power on.

2) Select the USB function.

3) Insert USB.

4) Never remove USB or AC cord while updating.

5) After update ﬁnish, power will be off automatically.

6) Power cord un-plug.

ESS / EQ PROGRAM UPDATE GUIDE

1-7

SPECIFICATIONS

• GENERAL

Power requirements Refer to main label.

Power consumption Refer to main label.

Networked standby : 0.5 W

(If all network ports are activated.)

Dimensions (W x H x D) Approx. 950 mm x 71 mm x 47 mm

Operating temperature 5 °C to 35 °C

Operating humidity 5 % to 90 %

Bus Power Supply 5 V 500 mA

Available Digital Input Audio Sampling Frequency 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz

Available Digital Input Audio format Dolby Digital, DTS Digital Surround, PCM

• INPUTS

OPTICAL IN (Digital audio in) 3 V (p-p), Optical jack x 1

PORT. IN (Portable in) 0.5 Vrms (3.5 mm stereo jack) x 1

• AMPLIFIER (RMS Output power)

Total 300 W RMS

Front 50 W RMS x 2 (4 Ωat 1 kHz, 10 % THD)

Subwoofer 200 W RMS (3 Ωat 80 Hz, 10 % THD)

• WIRELESS SUBWOOFER

Power requirements Refer to main label on the subwoofer.

Power consumption Refer to main label on the subwoofer.

Type 1 Way 1 Speaker

Impedance 3 Ω

Rated Input Power 200 W RMS

Max. Input Power 400 W RMS

Dimensions (W x H x D) Approx. 171 mm x 320 mm x 252 mm

•Designs and specifications are subject to change without prior notice.

1-8

2-1

SECTION 2

CABINET & MAIN CHASSIS

CONTENTS

EXPLODED VIEWS ........................................................................................................................................... 2-3

1. MAIN SET SECTION ................................................................................................................................ 2-3

2. WIRELESS SUBWOOFER SECTION...................................................................................................... 2-5

3. PACKING ACCESSORY SECTION ......................................................................................................... 2-7