LG SK6Y User manual

SERVICE MANUAL
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”
IN THIS MANUAL.
CONFIDENTIAL
MODEL: SK6Y (SK6Y, SPK5B-W)
P/NO : AFN78212059 JANUARY, 2018
MODEL: SK6Y
(SK6Y, SPK5B-W)
Copyright © 2018 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
SMART Hi-Fi AUDIO
Wireless Multi-room 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 © 2018 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 ........ WIRELESS RECEIVER PART (OPTION)

1-2
Copyright © 2018 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
NAME OF EACH COMPONENT ....................................................................................................................... 1-5
WIRELESS SUBWOOFER CONNECTION ....................................................................................................... 1-6
REAR SPEAKERS CONNECTION (SOLD SEPARATELY) ............................................................................ 1-7
HIDDEN KEY MODE ......................................................................................................................................... 1-8
SOFTWARE UPDATE GUIDE ........................................................................................................................... 1-9
SPECIFICATIONS ........................................................................................................................................... 1-16

1-3
Copyright © 2018 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 © 2018 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 © 2018 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
• Front Panel
A
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B
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htssjhynts/
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htssjhynts/
C
Onxuqf~|nsit|
D1(Standby)
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ADC IN"LNfifuyjwnsuzy-
BOPTICAL IN connector
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CPORTABLE IN connector
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DUSB (Service only)
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ELAN port
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FHDMI IN
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NAME OF EACH COMPONENT
• Rear Panel
Selects Wi-Fi function.

1-6
Copyright © 2018 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
WIRELESS SUBWOOFER CONNECTION
LED indicator of wireless subwoofer
LED Color Status
Green
(Blink)
The connection is trying.
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 of the sound bar and the
wireless subwoofer to the outlet.
2. Turn on the sound bar. The sound bar and the
wireless subwoofer will be automatically connected.
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. (If the green LED does
not blink, press and hold the Pairing button.)
2. Turn on the sound bar.
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 (3.3 ft) to prevent wireless
interference.
Pairing
XGGG
OZUZGP

1-7
Copyright © 2018 LG Electronics Inc. All rights reserved.
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 speakers kit
(SPK8-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
(Blink) The connection is trying.
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)

1-8
Copyright © 2018 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
1. FACTORY RESET
• Key : Press WiFi Button on the soundbar for 5 seconds.
• Result : Initialize EEPROM (MICOM) and MPEG (MAIN).
(But Wireless Woofer and Wireless Rear speakers are not)
2. SW Version Display
• Enter : Press Volume ‘-’ on Soundbar with ‘Play/Pause’ on Remocon for 5 seconds.
• Change Display : Whenever press ‘F.SKIP’ on remocon, displaying SW program is changed.
M : MICOM
PQ : PEQ
B : MAIN
D : DSP
H: HDMI
TX : WOOFER TX
RX : WOOFER RX
RT : REAR TX
RR : REAR RX
MQ : MEQ
T : TOUCH
• Result : Scroll SW Version on Soundbar VFD.
• EXIT : Press ‘Play/Pause’ on Remocon for 5 seconds.
< MICOM > < PEQ > < MAIN > < DSP >
3. OPTION Edit
• Enter : Volume ‘-’ on soundbar with ‘AV SYNC’ key on remocon for 5 seconds.
• Result : VFD display OPTION number and OPTION data like ‘’00 00” “02 4A” …
• How to Change Option data :
Change Option data by press ‘PLAY/PAUSE’ on remocon key,
change option number by press ‘B.SKIP’ on remocon, ‘F.SKIP’ on remocon after change option f nish,
press ‘AUTO VOL’ key. System will save option and restart.
4. WIRELESS WOOFER & REAR SPEAKER TX RESET
• ENTER : Press Mute key for 3 seconds when Woofer and Wireless Rear speaker is off.
• RESULT : VFD displays ‘WL RESET’’ and initialize TX module.
Paring will be disconnected.
HIDDEN KEY MODE
< MAIN Key > < Remocon >

1-9
Copyright © 2018 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
1. Using USB
1-1. USB UPDATE FILE NAME (yymmrrrr is 8 digit version number)
MAIN  MAIN_SK6_yymmrrrr.BIN
MICOM  MICOM_SK6_yymmrrrr.HEX
MEQ  MEQ_SK6_yymmrrrr.BIN
PEQ(pulsus)  PEQ_SK6_yymmrrrr.BIN
WOOFERRx  WOOFERRX_SK6_yymmrrrr.BIN
WOOFERTx  WOOFERTX_SK6_yymmrrrr.BIN
REARRx  REARRX_SK6_yymmrrrr.BIN
REARTx  REARTX_SK6_yymmrrrr.BIN
1-2. HOW TO UPDATE
• Copy Update f le to USB Root Directory.
• Turn on soundbar and change function to ‘WIFI’.
• Insert USB to USB Port at the back side of soundbar.
• VFD display ‘UPGRADE’
• Play/Pause key on remocon or WIFI key on soundbar can start UPDATE.
• After Update f nish, system will restart automatically.
• If reboot is f nish, VFD display ‘WiFi’.
DO NOT turn off during displaying ‘PLEASE WAIT’ on VFD.
※ Before update Woofer RX or Rear Rx WOOFER RX, Woofer and Rear Speaker have to be paired
with Main soundbar
SOFTWARE UPDATE GUIDE


1-10
Copyright © 2018 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
2. Using APP
Before Network update, soundbar has to be connected with ‘LG WifiSoundbar’ Application.
Step 1. Select setting gui.
Step 2. Select software version display.

1-11
Copyright © 2018 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
Using APP
Step 3. System compare current version
with the latest version at server.
Step 4. If there is new version on server, press Update.
Step 6. Updating Step 7. After update f nish, application
show the result.
Step 5. Update f le downloading.

1-16
Copyright © 2018 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
SPECIFICATIONS
• GENERAL
Power consumption Refer to the main label on the unit.
Power consumption Refer to the main label on the unit.
AC adapter Model : DA-38A25
Manufacturer : Asian Power Devices Inc.
Input : 100 - 240 V ~ 50 - 60 Hz
Output : 25 V 1.52 A
Dimensions (W x H x D) Approx. 1061.0 mm x 57.5 mm x 87.0 mm (with foot)
(41.8 inch x 2.3 inch x 3.4 inch)
Operating temperature 5 °C to 35 °C (41 °F to 95 °F)
Operating humidity 5 % to 90 %
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 3 V (p-p), Optical jack x 1
PORTABLE IN 0.32 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 360 W RMS
Front 80 W RMS x 2 (4 Ω at 1 kHz, THD 10%)
Subwoofer 200 W RMS (3 Ω at 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 200 W RMS
Max. Input Power 400 W RMS
Dimensions (W x H x D) Approx. 171.0 mm x 393.0 mm x 248.5 mm
(6.7 inch x 15.5 inch x 9.8 inch)
• SYSTEM
LAN port Ethernet jack x 1, 10 BASE-T/100 BASE-TX
Wireless LAN (Internal antenna) 802.11a/b/g/n Wi-Fi networks
SPK8-S (SPK8-S, S78S1-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 70 W RMS x 2 (3 Ω at 1 kHz, THD 10 %)
Dimensions (W x H x D) Approx. 60 mm x 220 mm x 175 mm
(2.4 inch x 8.7 inch x 6.9 inch)
• REAR SPEAKERS (EACH)
Type 1 Way 1 Speaker
Impedance 3 Ω
Rated Input Power 70 W RMS
Max. Input Power 140 W RMS
Dimensions (W x H x D) Approx. 100 mm x 140 mm x 100 mm
(3.9 inch x 5.5 inch x 3.9 inch)
• Designs and specifications are subject to change without prior notice.

2-1
Copyright © 2018 LG Electronics Inc. All rights reserved.
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 SUBWOOFER ........................................................................................ 2-9
EXPLODED VIEWS ......................................................................................................................................... 2-13
1. MAIN UNIT SECTION ............................................................................................................................. 2-13
2. WIRELESS SUBWOOFER SECTION .................................................................................................... 2-15
3. PACKING ACCESSORY SECTION ....................................................................................................... 2-17

2-2
Copyright © 2018 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
DISASSEMBLY INSTRUCTIONS
1
1
2
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Figure 1-1
1. HOW TO DISASSEMBLE THE MAIN UNIT
※ Before begin, position the Main Unit upside down.
1-1. Case Bottom Assembly
1) Remove the 24 screws.
2) Remove the Case Bottom Assembly.

2-3
Copyright © 2018 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
3
2
2
1
1
Figure 1-2 (2)
Figure 1-2 (1)
HOW TO DISASSEMBLE THE MAIN UNIT
2) Remove the 2 screws.
3) Remove the Main Frame Assembly (Main Chassis + PCBA).
1-2. Main Frame Assembly
1) Disconnect the 2 Network cables and harness cable from the Main PCB Assembly.

2-4
Copyright © 2018 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
2
1
mGwjiGh
1
1
1
4
3
2
2
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Figure 1-2-1
Figure 1-2-2
HOW TO DISASSEMBLE THE MAIN UNIT
1-2-1. Front PCB Assembly
1) Remove the 2 screws.
2) Remove the Front PCB Assembly.
1-2-2. Main PCB Assembly
1) Detach the cables from the Main chassis.
2) Disconnect the FFC cables from the Main PCB.
3) Remove the 1 screw (Main + HDMI Jack).
4) Remove the Main PCB Assembly.

2-5
Copyright © 2018 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
HOW TO DISASSEMBLE THE MAIN UNIT
7
6
1
2
3
45
4
WIRELESS Module
(RECEIVER)
BT Module WIRELESS Module
Figure 1-2-3
1-2-3. BT and WIRELESS Module
1) Disconnect the FFC cable from the BT module.
2) Remove the BT module.
3) Disconnect the FFC cable from the WIRELESS module.
4) Disconnect the 2 Hooks.
5) Remove the WIRELESS module.
6) Disconnect the FFC cable from the WIRELESS module(RECEIVER).
7) Remove the WIRELESS module(RECEIVER).

2-6
Copyright © 2018 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
HOW TO DISASSEMBLE THE MAIN UNIT
Figure 1-2-4
1-2-4. WI-FI Module
1) Disconnect the FFC cable from the WI-FI module.
2) Disconnect the Hook.
3) Remove the WI-FI module.
1
2
3
WITmpModule

2-7
Copyright © 2018 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
1
1
2
1
12
3
2
1
1
Figure 1-3
Figure 1-4
HOW TO DISASSEMBLE THE MAIN UNIT
1-3. SPEAKER CHAMBER L/R Assembly
1) Press the hook on both sides.
2) Disconnect the Network cable.
1-4. KEY PCB Assembly
1) Remove the Button Assembly.
2) Remove the Key PCB Assembly.
3) Disconnect the harness cable.