LG S90QY User manual

SERVICE MANUAL
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”
IN THIS MANUAL.
MODEL: S90QY (S90QY, SPQ8-W)
P/NO : AFN30076008 FEBRUARY, 2022
MODEL: S90QY
(S90QY, SPQ8-W)
Copyright © 2022 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
Wi-Fi SOUND BAR
“Any reproduction, duplication, distribution (including by way of email, facsimile or other
electronic means), publication, modification, copying or transmission of this Service Manual is
STRICTLY PROHIBITED unless you have obtained the prior written consent of the LG Electronics
entity from which you received this Service Manual. The material covered by this prohibition includes,
without limitation, any text, graphics or logos in this Service Manual.”

1-1
Copyright © 2022 LG Electronics Inc. All rights reserved.
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 ........ REAR KIT PART (OPTION)

1-2
Copyright © 2022 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
SECTION 1
SUMMARY
CONTENTS
PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO PRODUCTS.................................................... 1-3
SERVICING PRECAUTIONS ............................................................................................................................ 1-4
• GENERAL SERVICING PRECAUTIONS
• INSULATION CHECKING PRODEDURE
• ELECTROSTATICALLY SENSITIVE (ES) DEVICES
CONNECTING THE WIRELESS SUBWOOFER .............................................................................................. 1-5
CONNECTING THE REAR SPEAKERS TO THE WIRELESS RECEIVER (SPQ8-S, SOLD SEPARATELY) .... 1-6
WOOFER & REAR PAIRING METHOD............................................................................................................ 1-7
MOUNTING THE PRODUCT TO A WALL ....................................................................................................... 1-8
FIRMWARE UPDATE GUIDE ......................................................................................................................... 1-10
1. PREPARATION....................................................................................................................................... 1-10
2. USB UPDATE ......................................................................................................................................... 1-11
3. OOBE UPDATE (LG APP)...................................................................................................................... 1-14
4. OOBE UPDATE (GOOGLE HOME APP)............................................................................................... 1-16
HIDDEN KEY MODE ....................................................................................................................................... 1-19
NAME OF EACH COMPONENT ..................................................................................................................... 1-20
SPECIFICATIONS ........................................................................................................................................... 1-22
COMPARISON LIST........................................................................................................................................ 1-23

1-3
Copyright © 2022 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
PRODUCT SAFETY SERVICING GUIDELINES
FOR AUDIO PRODUCTS
IMPORTANT SAFETY NOTICE
This manual was prepared for use only by properly trained audio-video service
technicians.
When servicing this product, under no circumstances should the original design be
modified or altered without permission from LG Corporation. All components should
be replaced only with types identical to those in the original circuit and their physical
location, wiring and lead dress must conform to original layout upon completion of
repairs.
Special components are also used to prevent x-radiation, shock and fire hazard.
These components are indicated by the letter “x” included in their component des-
ignators and are required to maintain safe performance. No deviations are allowed
without prior approval by LG Corporation.
Circuit diagrams may occasionally differ from the actual circuit used. This way, imple-
mentation of the latest safety and performance improvement changes into the set is
not delayed until the new service literature is printed.
CAUTION : Do not attempt to modify this product in any way. Never perform cus-
tomized installations without manufacturer’s approval. Unauthorized modifications
will not only void the warranty, but may lead to property damage or user injury.
Service work should be performed only after you are thoroughly familiar with these
safety checks and servicing guidelines.
GRAPHIC SYMBOLS
The exclamation point within an equilateral triangle is intended to alert
the service personnel to important safety information in the service
literature.
The lightning flash with arrowhead symbol within an equilateral
triangle is intended to alert the service personnel to the presence of
noninsulated “dangerous voltage” that may be of sufficient magnitude
to constitute a risk of electric shock.
The pictorial representation of a fuse and its rating within an equilat-
eral triangle is intended to convey to the service personnel the follow-
ing fuse replacement caution notice:
CAUTION : FOR CONTINUED PROTECTION AGAINST RISK
OF FIRE, REPLACE ALL FUSES WITH THE SAME TYPE AND
RATING AS MARKED NEAR EACH FUSE.
SERVICE INFORMATION
While servicing, use an isolation transformer for protection from AC line shock. After
the original service problem has been corrected, make a check of the following:
FIRE AND SHOCK HAZARD
1. Be sure that all components are positioned to avoid a possibility of adjacent com-
ponent shorts. This is especially important on items trans-ported to and from the
repair shop.
2. Verify that all protective devices such as insulators, barriers, covers, shields, strain
reliefs, power supply cords, and other hardware have been reinstalled per the
original design. Be sure that the safety purpose of the polarized line plug has not
been defeated.
3. Soldering must be inspected to discover possible cold solder joints, solder
splashes, or sharp solder points. Be certain to remove all loose foreign particles.
4. Check for physical evidence of damage or deterioration to parts and components,
for frayed leads or damaged insulation (including the AC cord), and replace if
necessary.
5. No lead or component should touch a high current device or a resistor rated at 1
watt or more. Lead tension around protruding metal surfaces must be avoided.
6. After reassembly of the set, always perform an AC leakage test on all exposed
metallic parts of the cabinet (the channel selector knobs, antenna terminals,
handle and screws) to be sure that set is safe to operate without danger of electri-
cal shock. DO NOT USE A LINE ISOLATION TRANSFORMER DURING THIS
TEST. Use an AC voltmeter having 5000 ohms per volt or more sensitivity in the
following manner: Connect a 1500 ohm, 10 watt resistor, paralleled by a .15 mfd
150V AC type capacitor between a known good earth ground water pipe, con-
duit, etc.) and the exposed metallic parts, one at a time. Measure the AC voltage
across the combination of 1500 ohm resistor and .15 mfd capacitor. Reverse the
AC plug by using a non-polarized adaptor and repeat AC voltage measurements
for each exposed metallic part. Voltage measured must not exceed 0.75 volts
RMS. This corresponds to 0.5 milliamp AC. Any value exceeding this limit consti-
tutes a potential shock hazard and must be corrected immediately.
TIPS ON PROPER INSTALLATION
1. Never install any receiver in a closed-in recess, cubbyhole, or closely fitting shelf
space over, or close to, a heat duct, or in the path of heated air flow.
2. Avoid conditions of high humidity such as: outdoor patio installations where dew
is a factor, near steam radiators where steam leakage is a factor, etc.
3. Avoid placement where draperies may obstruct venting. The customer should
also avoid the use of decorative scarves or other coverings that might obstruct
ventilation.
4. Wall- and shelf-mounted installations using a commercial mounting kit must follow
the factory-approved mounting instructions. A product mounted to a shelf or plat-
form must retain its original feet (or the equivalent thickness in spacers) to provide
adequate air flow across the bottom. Bolts or screws used for fasteners must not
touch any parts or wiring. Perform leakage tests on customized installations.
5. Caution customers against mounting a product on a sloping shelf or in a tilted
position, unless the receiver is properly secured.
6. A product on a roll-about cart should be stable in its mounting to the cart.
Caution the customer on the hazards of trying to roll a cart with small casters
across thresholds or deep pile carpets.
7. Caution customers against using extension cords. Explain that a forest of exten-
sions, sprouting from a single outlet, can lead to disastrous consequences to
home and family.

1-4
Copyright © 2022 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
SERVICING PRECAUTIONS
CAUTION: Before servicing the Audio products covered by this
service data and its supplements and addends, read and fol-
low the SAFETY PRECAUTIONS.
NOTE: if unforeseen circumstances create conflict between
the following servicing precautions and any of the safety
precautions in this publication, always follow the safety pre-
cautions.
Remember Safety First :
General Servicing Precautions
1. Always unplug the
Audio products AC power cord from the
AC power source before:
(1) Removing or reinstalling any component, circuit board,
module, or any other assembly.
(2) Disconnecting or reconnecting any internal electrical
plug or other electrical connection.
(3) Connecting a test substitute in parallel with an electro-
lytic capacitor.
Caution: A wrong part substitution or incorrect polarity
installation of electrolytic capacitors may result in an
explosion hazard.
2. Do not spray chemicals on or near this
Audio products or any
of its assemblies.
3. Unless specified otherwise in this service data, clean elec-
trical contacts by applying an appropriate contact cleaning
solution to the contacts with a pipe cleaner, cotton-tipped
swab, or comparable soft applicator.
Unless specified otherwise in this service data, lubrication
of contacts is not required.
4. Do not defeat any plug/socket B+ voltage interlocks with
which instruments covered by this service manual might be
equipped.
5. Do not apply AC power to this
Audio products and / or any
of its electrical assemblies unless all solid state device heat
sinks are correctly installed.
6. Always connect the test instrument ground lead to an
appropriate ground before connecting the test instrument
positive lead. Always remove the test instrument ground
lead last.
Insulation Checking Procedure
Disconnect the attachment plug from the AC outlet and turn
the power on. Connect an insulation resistance meter (500V)
to the blades of the attachment plug. The insulation resis-
tance between each blade of the attachment plug and acces-
sible conductive parts (Note 1) should be more than 1Mohm.
Note 1: Accessible Conductive Parts include Metal panels,
Input terminals, Earphone jacks,etc.
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged
easily by static electricity. Such components commonly are
called Electrostatically Sensitive (ES) Devices. Examples
of typical ES 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 compo-
nent or semiconductor-equipped assembly, drain off any
electrostatic charge on your body by touching a known
earth ground. Alternatively, obtain and wear a commer-
cially 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 ES
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
ES 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 ES devices.
5. Do not use freon-propelled chemicals. These can generate
an electrical charge sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective
package until immediately before you are ready to install
it. (Most replacement ES devices are packaged with leads
electrically shorted together by conductive foam, aluminum
foil, or comparable conductive material).
7. Immediately before removing the protective material from
the leads of a replacement ES device, touch the protective
material to the chassis or circuit assembly into which the
device will be installed.
Caution: Be sure no power is applied to the chassis or cir-
cuit, and observe all other safety precautions.
8.Minimize bodily motions when handling unpackaged
replacement ES devices. (Normally harmless motion such
as the brushing together of your clothes fabric or the lifting
of your foot from a carpeted floor can generate static elec-
tricity sufficient to damage an ES device.)

1-5
Copyright © 2022 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
CONNECTING THE WIRELESS SUBWOOFER
Connecting the wireless subwoofer
automatically
After completing installation, the wireless subwoofer
will automatically be connected to the sound bar.
Connect the sound bar to the subwoofer in the fol-
lowing order.
1) Plug the power cable into the wireless subwoofer.
2) Plug the power cable connected to the wireless
subwoofer into an outlet.
3) Plug the power cable into the sound bar.
4) Plug the power cable connected to the sound bar
into an outlet.
5) When the connection is automatically established,
you will see the LED on the back of the wireless
subwoofer light up in green.
Checking the connection with the LED on
the back of the wireless subwoofer
You can check the connection status by looking at the
LED on the back of the wireless subwoofer.
LED Color Status
Blinking green
Connecting in progress
Green Connected successfully
Red Bad connection,
or the subwoofer is in standby
Off Power cable not connected
Connecting the wireless subwoofer
manually
If you see a red LED on the back of the wireless sub-
woofer, it means that the sound bar is not connected
to the subwoofer. If this is the case, connect them in
the following order.
1) Press the Power button on the sound bar to turn
it off.
2) Press the PAIRING button on the back of the
wireless subwoofer. Check if the LED on the back
of the subwoofer is blinking green. If you still see
a red LED on the wireless subwoofer, press and
hold the button on the back of the subwoofer again.
3) Press the Power button on the sound bar to turn
it on.
4) When the connection is established, you will see
the LED light on the back of the wireless subwoofer
light up in green.
Note
• Install the sound bar as close to the wireless
subwoofer as possible. The closer the distance
between the sound bar and the wireless subwoofer,
the better the sound quality.
• Please ensure there are no obstacles between the
sound bar and the wireless subwoofer.
• To prevent wireless interference, maintain a
distance of at least 1 m (3.3 ft) between the sound
bar or the wireless subwoofer and any peripheral
devices that generate strong electromagnetic waves
(ex. wireless routers, microwave ovens, etc.).

1-6
Copyright © 2022 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
CONNECTING THE REAR SPEAKERS TO THE WIRELESS RECEIVER
(SPQ8-S, SOLD SEPARATELY)
Automatic connection
After completing installation, the wireless receiver
will automatically be connected to the sound bar.
Connect the sound bar to the wireless receiver in the
following order.
1) Connect the speaker cables to the corresponding
terminals on the rear speakers (left, right).
Connect the black striped cable to the negative
terminal and the other cable to the positive
terminal.
2) Connect the speaker cables on the rear speakers
(left, right) to the wireless receiver.
Receiver Terminal
Color Speaker Position
Blue
L Left rear
Gray R Right rear
3) Plug the power cable into the wireless receiver.
4) Plug the power cable connected to the wireless
receiver into an outlet.
5) Press the Power button on the sound bar to turn
it on.
6) When the connection is automatically established,
you will see the LED on the front of the wireless
receiver light up in green.
Note
• Please only use the speakers provided with the
product. Using other speakers may cause malfunction.
• Connect the speaker cables to the corresponding
terminals. Connect to the positive cable to the
positive terminal and the negative cable to the
negative terminal. An incorrectly connected cable
will distort the sound or produce no bass.
Checking connection status with the LED
color
You can check the connection status with the LED on
the front of the wireless receiver.
LED Color Status
Blinking green
Connecting in progress
Green Connected successfully
Red Bad connection,
or the subwoofer is in standby
Off Power cable not connected
Manual connection
If you see a red LED on the front of the wireless re-
ceiver, it means that the sound bar is not connected
to the receiver. If this is the case, connect them in the
following order.
1) Press the Power button on the sound bar to turn
it off.
2) Press the PAIRING button on the back of the
wireless receiver. Check if the LED on the front of
the wireless receiver is blinking green.
3) Press the Power button on the sound bar to turn
it on.
4) When the connection is established, you will see
the LED light on the front of the wireless receiver
light up in green.
Note
• Keep the rear speakers at least 30 cm (11.8 inch)
away from the TV or monitor.
• To prevent wireless interference, maintain a
distance of at least 1 m (3.3 ft) between the sound
bar or the wireless receiver and any peripheral
devices that generate strong electromagnetic waves
(ex. wireless routers, microwave ovens, etc.).

1-7
Copyright © 2022 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
How to pair the subwoofer with the rear kit
1) Press the ‘Volume’ key on the remote control or main set to adjust the volume to the minimum.
2) Press the ‘Mute’ key on the remote control for 2~3 seconds.
3) Press the pairing key on the back of the subwoofer and rear kits.
4) When attempting to pair the subwoofer and the rear kit, the green LED flashes faster than the Standby state.
5) If the subwoofer and rear kit are wirelessly connected, the LED will remain solid green.
WOOFER & REAR PAIRING METHOD
< Remote control >
< Back side of the Rear kit >
Mute Key
Paring Key
Standby LED
< Subwoofer >
< Front side of the Rear kit >

1-8
Copyright © 2022 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
1. Components for mounting the product
1) Sound bar
2) Wall bracket
3) Sound bar screws
4) Wall bracket installation guide
5) Bracket screws
6) Wall plugs
Note :
• Screws and Wall Plugs are not supplied for mounting the product. We recommend the Hilti (HUD-1 6 x 30)
for the mounting.
2. Mounting the Product to a Wall
1) Find the wall bracket installation guide in the product package.
2) Align the “TV Bottom Line” on the wall bracket installation guide with the bottom of the TV, and attach it to the wall.
Align the center of the wall-mounted TV with the part marked “TV Center” in the installation guide.
3) With a pen, mark screw holes on the installation guide where the wall brackets will be attached.
MOUNTING THE PRODUCT TO A WALL

1-9
Copyright © 2022 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
Mounting the Product to a Wall
4) Drill screw holes in the marked positions on the installation guide.
5) Remove the wall bracket installation guide from the wall.
6) Fix the brackets firmly to the wall using the wall plugs and screws.
7) Place the product on the brackets. Position the product on the brackets so the screw holes on the bottom
of the product align with the screw holes on the wall bracket.
8) Firmly affix the product to the wall brackets using the screws provided.

1-10
Copyright © 2022 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
1. Preparation
1) S90Q Series Units : Main Unit, Wireless Subwoofer Unit, Rear Speaker Unit(optional)
2) S90Q RCU
3) USB Memory
4) Smart Phone with “LG Sound Bar” App
Caution :
•Take care not to power off during update.
•Do format USB memory before update (FAT32 file system).
FIRMWARE UPDATE GUIDE
<Main Unit>
Necessary
<RCU>
Necessary
<Wireless Subwoofer Unit>
If wireless subwoofer rx module
of primary unit is updated
<USB Memory>
for USB update
<Rear Speaker Unit>
Optional as model suffix.
If wireless rear rx module
is updated.
<Smart Phone>
for OOBE update
“LG Sound Bar” App
must be installed.

1-11
Copyright © 2022 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
2. USB update
Step 1. Prepare S90Q update binaries.
USB
Update module S90Q File name Sample
B/E MAIN_S90Q_*.bin MAIN_S90Q_WSB_2002171.bin
Micom MICOM_S90Q_*.HEX MICOM_S90Q_WSB_2002121_EBA2_rev2503.
HEX
Touch TOUCH_S90Q_*.DLD TOUCH_S90Q_C4A_2001071_0xF535.dld
Wireless Subwoofer/Rear L/
RearKit Tx
WOOFER_REAR_TX_1T2_
S90Q_*.BIN
WOOFER_REAR_TX_1T2_S90Q_BAR_190007_
PRO1_CHECKSUM_C7CA.bin
Wireless Subwoofer Rx WOOFERRX_1T2_S90Q_*.BIN WOOFERRX_1T2_S90Q_BAR_191008_PRO1_
CHECKSUM_90BE.bin
Wireless RearKit Rx REARKITRX_1T2_S90Q_*.BIN REARKITRX_1T2_S90Q_BAR_185001_PRO1_
CHECKSUM_DFDF.bin
MEQ MEQ_S90Q_*.BIN MEQ_S90Q_WSB_20012874_113652.BIN
PEQ PEQ_S90Q_*.BIN PEQ_S90Q_171016.bin
Step 2. Copy all updated S90Q binaries to USB memory.
Step 3. Power on S90Q main unit.
Step 4. If there is an updated wireless subwoofer rx binary in update list,
you need to pair between main unit and subwoofer unit before start update.
Step 5. If there is an updated wireless rear rx binary in update list,
you need to pair between main unit and rear speaker unit before start update.
Step 6. Press Function key to change function to USB.
Verify whether USB function is or not by VFD.

1-12
Copyright © 2022 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
USB update
Step 7. Attach USB which has update binaries to the USB slot back of S90Q main unit.
Step 8. Update binaries will be copied from USB disk to temporary area of S90Q.
VFD will display “COPY”.
Step 9. If update is ready, VFD will display “REMOVE”.
If you detach the USB disk from USB slot, update will start automatically.
COPY
REMOV Escroll
Update module VFD display
B/E
MICOM
Touch
Wireless Subwoofer Tx
Wireless Subwoofer Rx
Wireless Rear Tx
Wireless Rear Rx
MEQ
PEQ
B-UPD AT E scroll
M-UPD AT E
scroll
WT 00
T 00
WR 00
RT 00
RR 00
MQ-UP DATE
scroll
EQ-UP DATE
scroll
<S90Q VFD Display in Update>
※The numbers in VFD display of wireless modules will increase in progress as progress percent from 00 to 100.

1-13
Copyright © 2022 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
USB update
Step 10. S90Q main unit will be reset automatically after update finish.
Step 11. Check the current versions to verify whether the update was successfully completed or not.
1) Press “Version Check” hidden key
• Version Check Hidden Key : Press Set “Vol-” + RCU “Enter” for 3 seconds
+
PLEAS E WAIT
scroll
USB
2) S90Q shows the version of all modules in the order shown below.
• The order that S90Q shows version in version check hidden mode.
S90Q :
WOW MEQ TOUCH Woofer RX REAR Kit RX Woofer Tx Rear Kit TX PEQ
MICOM BE Option
3) Compare the version VFD shows and you updated.
Module VFD display sample
MICOM
PEQ
B/E
C4A
MEQ
WTP3(MAIN)
(Connected Status)
WTP3(HDMI)
(Connected Status)
Wireless Subwoofer Tx
Wireless Subwoofer Rx
Wireless Rear Tx
Wireless Rear R Rx
Touch
M2201241
PQ2110210-6326
B2111250
1.52.272222
MQ2110229
TX210002
WD210911
WH1.22
RX201005
RT214002
BR205210
T2001075
< S90Q VFD Display in Version Display>

1-14
Copyright © 2022 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
3. OOBE update (LG App)
Step 1. Prepare S90Q main unit and Smart Phone with “LG Sound Bar” App.
In setting up the network in OOB(out of the box), S90Q will be updated to the latest version
automatically.
Step 2. Power on S90Q main unit.
Step 3. Open “LG Sound Bar” App.
Step 4. Set up S90Q using “LG Sound Bar” App.

1-15
Copyright © 2022 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
OOBE update (LG App)
Step 5. After network setup is complete, if the update server has uploaded the latest version that requires
an update, the S90Q will automatically proceed with the update at this step.
If the S90Q is already the latest version, App shows S90Q without update step.
Step 6. At the end of the update step, LG App shows the S90Q on device list.
B-UPD
M-UPD
AT E
scroll
AT E
scroll
PLEAS E WAIT
scroll
WI-FI
53;
53;
53;

1-16
Copyright © 2022 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
4. OOBE update (Google Home App)
※Setting up a network through Google Home App
LG S90Q support Google Home App to connect Wi-Fi network.
So OOBE Update is also provided by Google Home App.
But LG does NOT recommend using Google Home App to setting up a network.
Please use LG Wi-Fi Speaker App if you could.
Step 1. Prepare S90Q main unit and Smart Phone with “Google Home” App. (LG Wi-Fi Speaker App
recommended) In setting up the network in OOB(out of the box), S90Q will be updated to the
latest version automatically.
Step 2. Power on S90Q main unit.
Step 3. Open “Google Home” App.
Step 4. Set up S90Q using Google Home App.

1-17
Copyright © 2022 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
OOBE update (Google Home App)
5220
Step 5. If the update server has uploaded the latest version that requires an update,
the S90Q will automatically proceed with the update at this step.
If the S90Q is already the latest version, network setup will be finish without update.
B-UPD
M-UPD
AT E scroll
AT E scroll
PLEAS E WAITscroll
WI-FI
8SGDWLQJ 5 220 6SHD NH U

1-18
Copyright © 2022 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
OOBE update (Google Home App)
Step 6. At the end of the update step on Google Home App, the network setup is complete.

1-19
Copyright © 2022 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
1. Factory Reset
Press Wi-Fi Mute key 5 seconds, VFD display RESET. System rebooting.
2. Check Version
• Soundbar Volume ‘−’ key + Remocon PLAY key for 3 seconds.
• Each Program Version is displayed when press Remocon Select key.
M : MICOM PQ : PEQ B : Main APK No Alphabet : Main Android
TX : Woofer TX RX : Woofer RX D : DSP H : HDMI
RR : Rear RX RT : Rear TX T : Touch L : Sub MICOM
< MICOM > < DSP > < PEQ >
3. Woofer (Rear Speaker) Reset
Soundbar Volume ‘−’ key and Remocon MUTE for 3sec
• Volume must be Min ( 0 ) before input those keys.
• Woofer (Rear Speaker) must Power Off before input those keys.
• Woofer and Rear Speaker can be reset by pressing reset button on each unit.
HIDDEN KEY MODE