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Website http://biz.lgservice.com

SERVICE MANUAL
Sound Bar System

MODEL: NB5530A (NB5530A, S73A1-D)
SERVICE MANUAL
MODEL: NB5530A
(NB5530A, S73A1-D)

CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS"
IN THIS MANUAL.

P/NO : AFN76035867 JUNE, 2013
CONTENTS

SECTION 1 ........ GENERAL
SECTION 2 ........ CABINET & MAIN CHASSIS
SECTION 3 ........ ELECTRICAL
SECTION 4 ........ WIRELESS SUBWOOFER PART
SECTION 5 ........ REPLACEMENT PARTS LIST

1-1
SECTION 1
GENERAL

CONTENTS

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

MICOM HIDDEN KEY MODE ......................................................................................................................... 1-4

UPDATE PROGRAM ....................................................................................................................................... 1-5
1. How to connect a jig board to download new program ............................................................................ 1-5
2. File name .................................................................................................................................................. 1-5
3. Creating a firmware update device ........................................................................................................... 1-5
4. Updating a program .................................................................................................................................. 1-6

SERVICE INFORMATION FOR EEPROM .................................................................................................... 1-6

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

1-2
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.

1-3
MICOM HIDDEN KEY MODE
Entrance Key
Hidden Mode Remote control for Remote control for Exit Key Display Result
NB5530 general sound bar
M 1305011 1) Micom
E 1305021 2) ESS
T 1305031 3) Touch Key
TX111 4) wireless SPK module
SET `VOL-' SET `VOL-' POWER TX,RX Ver
VERSION CHECK
+ RMC `LGTV' + RMC `PLAY' OFF ex) TX35RX35
RX232 5) wireless SPK Micom Ver
ex) W 1007130
005100037113 6) EEPROM option value
(on Scroll)
UPDATE MODE POWER
SET `Vol-' + RCU `BT' SET `VOL-' + RCU 7' "USB" for program downloading
ENTRY OFF
EEPROM INITIAL not available SET `VOL-' + RMC `0' Auto exit "ECLR" EEPROM initializing
SET `VOL-'
EEPROM EDIT SET `VOL-' + RMC `2' Toggling OP0-10 Edit Micom option
+ RMC `OPT'
SET `VOL-'
Wireless Speaker + RMC `MUTE' or SET `VOL-' + RMC Connecting Wireless spk to
Toggling "REMA"
Remate SET `VOL-' `MUTE' main set
+ TV RMC `MUTE'
Clip Off not available SET `VOL-' + RMC `8' Toggling "COFF" To Test (output etc.)
Monitoring Changed Monitoring Changed Gain at
not available SET `VOL-' + RMC `8' Toggling -0,0 dB
Gain at Clip ON Clip ON
SET `VOL-' SET `VOL-' For Max Volume setting
MAX Volume Edit Toggling MV-XX
+ RMC `VOL+' + RMC `SLEEP' (1 ~ 40)
SET `VOL-' + RMC `3D To change the frequency of
Wireless RF Change SET `VOL-' + RMC `4' Toggling "TG-1"
Sound Off' wireless RF
Bypass SET `VOL-' + RMC `1' - - BYPA For test only
Up RMC `3D Sound On' RMC `Repeat' (Up) - -
RMC `Play/Pause'
Down RMC `Auto Power On' - -
(Down)
Arrow keys to change or
Right RMC `DRC Off' RMC `F.Skip' (Right) - - move option code
Left RMC `Woofer Level -' RMC `B.Skip' (Left) - -
Enter RMC `DRC On' RMC `Stop' (Enter) - -

1-4
UPDATE PROGRAM
1. How to connect a jig board to download new program
1) Open the jack cover of your unit.
2) Remove a plastic plate to protect the download wafer on the main board.
3) Insert the cable of program downloading jig board into the wafer.
4) Plug the power cord of adapter into the outlet.
5) After power the unit on, press VOL- button with "BT" key on the remote control
to edit EEPROM data.
The EEPROM data will be displayed on your jig board.
6) Change "00" to "04" on the third option code using / / / buttons.
Press "3D Sound On" button for .
Press "Auto Power On" button for .
Press "Woofer Level