Lg Sj4y User manual

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”

IN THIS MANUAL.

CONFIDENTIAL

MODEL: SJ4Y (SJ4Y, SPJ4B-W)

P/NO : AFN78302533 FEBRUARY, 2019

MODEL: SJ4Y

(SJ4Y, SPJ4B-W)

Only for training and service purposes.

Wireless Sound Bar

1-1

Only for training and service purposes.

CONTENTS

SECTION 1 ........ GENERAL

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

SECTION 3 ........ ELECTRICAL

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

SECTION 5 ........

WIRELESS RECEIVER PART (OPTION)

1-2

Only for training and service purposes.

SECTION 1

GENERAL

CONTENTS

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

NAME OF EACH COMPONENT ....................................................................................................................... 1-4

WIRELESS SUBWOOFER CONNECTION....................................................................................................... 1-5

REAR SPEAKERS CONNECTION (SOLD SEPARATELY) ............................................................................ 1-6

ABOUT LED CONDITION ................................................................................................................................. 1-7

HIDDEN KEY MODE ......................................................................................................................................... 1-8

SOFTWARE UPDATE GUIDE........................................................................................................................... 1-9

SPECIFICATIONS ........................................................................................................................................... 1-15

1-3

Only for training and service purposes.

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

Only for training and service purposes.

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Standby LED (Red)

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The buttons are located on the rear.

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xtzwhj/

1/!"^yfsig~&Zs-

BDC IN : LNfifuyjwnsuzy

COPTICAL IN : Zuynhfqnsuzy

DPORTABLE IN : [twyfgqjnsuzy

EUSB

FHDMI OUT (TV ARC) / IN : SOXTtzyuzy&nsuzy

NAME OF EACH COMPONENT

• Front Panel

• Rear Panel

1-5

Only for training and service purposes.

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 (3.28 ft) to prevent wireless

interference.

!P

1-6

Only for training and service purposes.

Connecting the rear speakers

1. Connect the black stripe wire to the terminal

marked - (minus) and the other end to the terminal

marked + (plus).

2. Connect the wireless receiver and the rear

speakers (right, left) with the speaker cables.

Color Position

Grey Rear right

Blue Rear left

Note

You need to purchase the wireless rear speaker kit

(SPJ4-S) to enjoy surround sound.

Caution

•Use the speaker supplied with this unit only. Using

any other speaker may cause malfunction.

•Be sure to match the speaker cable to the

appropriate terminal on the components: + to + and

– to –. If the cables are reversed, the sound will be

distorted and will lack bass.

LED indicator of wireless receiver

LED Color Status

Yellow - green

The wireless receiver is receiving

the signal from the sound bar.

Red The wreless receiver is in

standby mode.

Off

(No display)

The power cord of wireless

receiver is disconnected

Setting up the wireless receiver for the

ﬁrst time

1. Connect the power cord to the wireless receiver

to the outlet.

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

wireless receiver will be automatically connected.

- Yellow - green LED on the wireless receiver

turns on.

Manually pairing wireless receiver

When your connection is not completed, you can

see the red LED on the wireless receiver and rear

speakers are not made sound. To solve the problem,

follow the below steps.

1. Press PAIRING button on the rear of the wireless

receiver.

- The yellow - green LED on the wireless receiver

blinks quickly.

2. Turn on the main unit

3. Paring is completed.

- The yellow - green LED on the wireless receiver

turns on.

REAR SPEAKERS CONNECTION (SOLD SEPARATELY)

1-7

Only for training and service purposes.

LED Condition Description

Z[_TNLWWPOyzwsxts/ Z[_TNLWkzshyntsnxxjqjhyji/

Z[_TNLWWPOgqnspxy|nhjfsi

yzwsxts/

WRxtzsix~sh"Zuynhfq-kzshyntsnx

xjqjhyji/

`^MWPOyzwsxts/ `^Mkzshyntsnxxjqjhyji/

USB LED blinks. [fzxji`^Muqf~gfhp/

BT (Bluetooth-WPOyzwsxts/ [fnwji|nymBluetoothij{nhj/

BT (Bluetooth) LED blinks. bfnynslktwBluetoothhtssjhynts/

WR_aWPOyzwsxts/ WR^tzsi^~sh"bnwjqjxx-kzshyntsnx

xjqjhyji/

HDMI IN WPOyzwsxts/ SOXTTYkzshyntsnxxjqjhyji/

WR_afsiSOXTTYWPOxyzws

ts/ [Z]_LMWPkzshyntsnxxjqjhyji/

USB and BT (Bluetooth) LEDs

yzwsts/ L]Nkzshyntsnxxjqjhyji

ybmjs~tzuwjxxfs~gzyyts0xyfsig~LED (Red) tsymjrfnszsnygqnspx/

ybmjs~tzuwjxx "Xzyj-gzyyts0xyfsig~WPO"]ji-gqnspxxqt|q~/

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ybmjsymnxzsnywjfhmjxrf}nrzr{tqzrj0xyfsig~WPO"]ji-yzwsxtsktwDxjhtsix/

ybmjs~tzuwjxx{tqzrj"o&p-gzyytshtsynszfqq~0xyfsig~WPO"]ji-gqnspxvznhpq~/

, Note

ABOUT LED CONDITION

1-8

Only for training and service purposes.

HIDDEN KEY MODE

HIDDEN MODE KEYS

EEPROM OPTION EDIT Main unit ' (Volume)' + Remote control 'REAR LEVEL+' for more than 3 seconds.

EEPROM CLEAR (Initialize) Main unit ' (Volume)' + Remote control 'ASC' for more than 3 seconds.

VERSION CHECK

Main unit ' (Volume)' + Remote control ' (Play/Pause)' for more than 3 seconds.

Next : Forward Skip / Previous : Backward Skip

Exit : Power off

Direction key for HIDDEN MODE Play/Pause (UP) / WOOFER LEVEL+ (Down) / Forward Skip (Right) / Backward Skip (Left) /

AUTO POWER ON (Enter)

Demo Mode (Play) Enter : Main unit “MIN” (volume minimum state) + Main unit 'F' (Function) for 7 seconds.

Exit : Main unit 'F' (Function) for 7 seconds.

TV Remote control On/Off

On : Press and hold 'REAR LEVEL-' on the remote control for about 2 seconds.

Off : Press and hold 'REAR LEVEL-' and press it once again while “ON - TV REMOTE” is scrolled.

Display window : “ON - TV REMOTE” <=> “OFF - TV REMOTE”

BT Lock On/Off

On : Press and hold 'AUTO POWER ON' on the remote control for about 2 seconds

in BT function and press it once again while “OFF - BT LOCK” is scrolled.

Off : Press and hold 'AUTO POWER OFF' on the remote control for about 2 seconds

in BT function and press it once again while “ON - BT LOCK” is scrolled.

Display window : “ON - BT LOCK” <=> “OFF - BT LOCK”

Wireless Factory Main unit “MIN” (volume minimum state) + Remote control ' (Mute)' for about 3 seconds.

Preparation

Please connect Display Jig to the Main Board CN106.

1-9

Only for training and service purposes.

1. Using USB

1-1. Preparation

- Remote control.

- Do format USB Memory to FAT32 File system.

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

Ex ) SJ4 :

MAIN E:\DSP_MAIN_SJ4.ROM (if USB driver is E:\)

MICOM E:\MICOM_SJ4.HEX (if USB driver is E:\)

BLUETOOTH E:\BT_SJ4.BIN (if USB driver is E:\)

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

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

OPTION E:\OPT.BIN (if USB driver is E:\)

WOOFER WIRELESS TX E:\WIRELESS_TX.bin (if USB driver is E:\)

WOOFER WIRELESS RX E:\WIRELESS_RX.bin (if USB driver is E:\)

REAR WIRELESS TX E:\WIRELESS_REAR_TX.BIN (if USB driver is E:\)

REAR WIRELESS RX E:\WIRELESS_REAR_RX.BIN (if USB driver is E:\)

1-2. 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.

SOFTWARE UPDATE GUIDE

1-10

Only for training and service purposes.

2-2. Connect Bluetooth

< Connected >

2-1.

Run BT App (Music Flow Bluetooth)

< Not Connected >

2. Using APP (FOTA : Firmware update Over The Air)

Connection

button

1-11

Only for training and service purposes.

2-3. Setting Menu

< Connected >

2-4-1. FOTA Start Button

(Phone should be available internet, Wi-Fi, LTE, 3G)

< Internet not Connected >

• Some Country(ex China) can not access to CDN

Server. And can not use FOTA. So, This Button can

not enable in that country.

Using APP (FOTA : Firmware update Over The Air)

Setting

button

FOTA Start

button

1-12

Only for training and service purposes.

2-5. FOTA Caution

Using APP (FOTA : Firmware update Over The Air)

2-4-2. FOTA Start Button

< Internet Connected >

button

FOTA Start

button

1-13

Only for training and service purposes.

Using APP (FOTA : Firmware update Over The Air)

2-6. FOTA - CDN Download

Cancel Button is available

When CDN downloading.

2-7. FOTA - OPP Download

Cancel Button is not available

When OPP downloading.

Cancel

button

Cancel

button

1-14

Only for training and service purposes.

Using APP (FOTA : Firmware update Over The Air)

2-8. FOTA - Write Flash

Cancel Button is not available

When Flash writing.

2-9. FOTA - Finish

Cancel

button

Power cable reconnect.

1-15

Only for training and service purposes.

SPECIFICATIONS

• GENERAL

Power consumption Refer to the main label.

Networked standby : 0.5 W (If all network ports are activated.)

AC adapter Model : DA-38A25

Manufacturer : Asian Power Devices Inc.

Input : 100 - 240 V ~ 50 - 60 Hz 1.2 A

Output : 25 V 1.52 A

Dimensions (W x H x D) Approx. 890 mm X 55 mm X 85 mm With foot

(35 inches x 2.17 inches x 3.35 inches) With foot

Operating temperature 5 °C to 35 °C (41 °F to 95 °F)

Operating humidity 5 % to 90 %

Bus Power Supply 5 V 500 mA

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

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

• INPUT/OUTPUT

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

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

HDMI IN 19 Pin (Type A, HDMI™ connector) x 1

HDMI OUT 19 Pin (Type A, HDMI™ connector) x 1

• AMPLIFIER (RMS OUTPUT)

Total 300 W RMS

Front 60 W RMS x 2 (4 Ωat 1 kHz, THD 10%)

Subwoofer 180 W RMS (3 Ωat 80 Hz, THD 10%)

• WIRELESS SUBWOOFER

Power requirements Refer to the main label on the wireless subwoofer.

Power consumption Refer to the main label on the wireless subwoofer.

Type 1 Way 1 Speaker

Impedance 3 Ω

Rated Input Power 180 W RMS

Max. Input Power 360 W RMS

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

(6.73 inches x 12.6 inches x 9.92 inches)

SPJ4-S (SPJ4-S, S65S3-S), Sold Separately

• WIRELESS RECEIVER

Power requirements Refer to the main label on the wireless receiver.

Power consumption Refer to the main label on the wireless receiver.

Rear 60 W RMS x 2 (3 Ωat 1 kHz, THD 10%)

Dimensions (W x H x D) Approx. 60 mm x 220 mm x 175 mm

(2.36 inches x 8.66 inches x 6.88 inches)

• REAR SPEAKERS (EACH)

Type 1 Way 1 Speaker

Impedance 3 Ω

Rated Input Power 60 W RMS

Max. Input Power 120 W RMS

Dimensions (W x H x D) Approx. 88 mm x 122 mm x 81 mm

(3.46 inches x 4.8 inches x 3.18 inches)

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

1-16

Only for training and service purposes.

2-1

Only for training and service purposes.

SECTION 2

CABINET & MAIN CHASSIS

CONTENTS

DISASSEMBLY INSTRUCTIONS ..................................................................................................................... 2-2

1. HOW TO DISASSEMBLE THE MAIN UNIT ............................................................................................. 2-2

2. HOW TO DISASSEMBLE THE WOOFER ............................................................................................... 2-8

EXPLODED VIEWS ......................................................................................................................................... 2-11

1. MAIN UNIT SECTION............................................................................................................................. 2-11

2. WIRELESS SUBWOOFER SECTION.................................................................................................... 2-13

3. PACKING ACCESSORY SECTION ....................................................................................................... 2-15