LG 55EG9A7V-ZB User manual

P/NO : MFL70179701 (1703-REV00)
CHASSIS : ED79A
MODEL : 55EG9A7V 55EG9A7V-ZB
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
OLED TV
SERVICE MANUAL
CONFIDENTIAL
Copyright © 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

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Only for training and service purposes.
CONTENTS
CONTENTS .............................................................................................. 2
SAFETY PRECAUTIONS ........................................................................ 3
SERVICING PRECAUTIONS.................................................................... 4
SPECIFICATION ....................................................................................... 6
SOFTWARE UPDATE .............................................................................13
BLOCK DIAGRAM...................................................................................14
EXPLODED VIEW .................................................................................. 20
DISASSEMBLY GUIDE........................................................................... 21
TROUBLE SHOOTING GUIDE ................................................ APPENDIX

- 3 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the
Exploded View.
It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent
Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
General Guidance
An isolation Transformer should always be used during the
servicing of a receiver whose chassis is not isolated from the AC
power line. Use a transformer of adequate power rating as this
protects the technician from accidents resulting in personal injury
from electrical shocks.
It will also protect the receiver and it's components from being
damaged by accidental shorts of the circuitry that may be
inadvertently introduced during the service operation.
If any fuse (or Fusible Resistor) in this TV receiver is blown,
replace it with the specified.
When replacing a high wattage resistor (Oxide Metal Film Resistor,
over 1 W), keep the resistor 10 mm away from PCB.
Keep wires away from high voltage or high temperature parts.
Before returning the receiver to the customer,
always perform an AC leakage current check on the exposed
metallic parts of the cabinet, such as antennas, terminals, etc., to
be sure the set is safe to operate without damage of electrical
shock.
Leakage Current Cold Check(Antenna Cold Check)
With the instrument AC plug removed from AC source, connect an
electrical jumper across the two AC plug prongs. Place the AC
switch in the on position, connect one lead of ohm-meter to the AC
plug prongs tied together and touch other ohm-meter lead in turn to
each exposed metallic parts such as antenna terminals, phone
jacks, etc.
If the exposed metallic part has a return path to the chassis, the
measured resistance should be between 1 MΩand 5.2 MΩ.
When the exposed metal has no return path to the chassis the
reading must be infinite.
An other abnormality exists that must be corrected before the
receiver is returned to the customer.
Leakage Current Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet.
Do not use a line Isolation Transformer during this check.
Connect 1.5 K / 10 watt resistor in parallel with a 0.15 uF capacitor
between a known good earth ground (Water Pipe, Conduit, etc.)
and the exposed metallic parts.
Measure the AC voltage across the resistor using AC voltmeter
with 1000 ohms/volt or more sensitivity.
Reverse plug the AC cord into the AC outlet and repeat AC voltage
measurements for each exposed metallic part. Any voltage
measured must not exceed 0.75 volt RMS which is corresponds to
0.5 mA.
In case any measurement is out of the limits specified, there is
possibility of shock hazard and the set must be checked and
repaired before it is returned to the customer.
Leakage Current Hot Check circuit
IMPORTANT SAFETY NOTICE
SAFETY PRECAUTIONS

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Only for training and service purposes.
SERVICING PRECAUTIONS
CAUTION: Before servicing receivers covered by this service
manual and its supplements and addenda, read and follow the
SAFETY PRECAUTIONS on page 3 of this publication.
NOTE: If unforeseen circumstances create conict between the
following servicing precautions and any of the safety precautions
on page 3 of this publication, always follow the safety precau-
tions. Remember: Safety First.
General Servicing Precautions
1. Always unplug the receiver AC power cord from the AC power
source before;
a. Removing or reinstalling any component, circuit board
module or any other receiver assembly.
b. Disconnecting or reconnecting any receiver electrical plug
or other electrical connection.
c. Connecting a test substitute in parallel with an electrolytic
capacitor in the receiver.
CAUTION: A wrong part substitution or incorrect polarity
installation of electrolytic capacitors may result in an explo-
sion hazard.
2. Test high voltage only by measuring it with an appropriate
high voltage meter or other voltage measuring device (DVM,
FETVOM, etc) equipped with a suitable high voltage probe.
Do not test high voltage by "drawing an arc".
3. Do not spray chemicals on or near this receiver or any of its
assemblies.
4. Unless specied otherwise in this service manual, clean
electrical contacts only by applying the following mixture to the
contacts with a pipe cleaner, cotton-tipped stick or comparable
non-abrasive applicator; 10 % (by volume) Acetone and 90 %
(by volume) isopropyl alcohol (90 % - 99 % strength)
CAUTION: This is a ammable mixture.
Unless specied otherwise in this service manual, lubrication
of contacts in not required.
5. Do not defeat any plug/socket B+ voltage interlocks with which
receivers covered by this service manual might be equipped.
6. Do not apply AC power to this instrument and/or any of its
electrical assemblies unless all solid-state device heat sinks
are correctly installed.
7. Always connect the test receiver ground lead to the receiver
chassis ground before connecting the test receiver positive
lead.
Always remove the test receiver ground lead last.
8. Use with this receiver only the test xtures specied in this
service manual.
CAUTION: Do not connect the test xture ground strap to any
heat sink in this receiver.
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid-state) devices can be damaged eas-
ily by static electricity. Such components commonly are called
Electrostatically Sensitive (ES) Devices. Examples of typical ES
devices are integrated circuits and some eld-effect transistors
and semiconductor “chip” components. The following techniques
should be used to help reduce the incidence of component dam-
age caused by static 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. Alter-
natively, obtain and wear a commercially available discharg-
ing wrist strap device, which should be removed to prevent
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 expo-
sure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder
ES devices.
4. Use only an anti-static type solder removal device. Some sol-
der removal devices not classied as “anti-static” can generate
electrical charges sufcient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate
electrical charges sufcient 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 elec-
trically 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 mate-
rial 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 replace-
ment ES devices. (Otherwise harmless motion such as the
brushing together of your clothes fabric or the lifting of your
foot from a carpeted oor can generate static electricity suf-
cient to damage an ES device.)
General Soldering Guidelines
1. Use a grounded-tip, low-wattage soldering iron and appropri-
ate tip size and shape that will maintain tip temperature within
the range or 500 °F to 600 °F.
2. Use an appropriate gauge of RMA resin-core solder composed
of 60 parts tin/40 parts lead.
3. Keep the soldering iron tip clean and well tinned.
4. Thoroughly clean the surfaces to be soldered. Use a mall wire-
bristle (0.5 inch, or 1.25 cm) brush with a metal handle.
Do not use freon-propelled spray-on cleaners.
5. Use the following unsoldering technique
a. Allow the soldering iron tip to reach normal temperature.
(500 °F to 600 °F)
b. Heat the component lead until the solder melts.
c. Quickly draw the melted solder with an anti-static, suction-
type solder removal device or with solder braid.
CAUTION: Work quickly to avoid overheating the circuit
board printed foil.
6. Use the following soldering technique.
a. Allow the soldering iron tip to reach a normal temperature
(500 °F to 600 °F)
b. First, hold the soldering iron tip and solder the strand
against the component lead until the solder melts.
c. Quickly move the soldering iron tip to the junction of the
component lead and the printed circuit foil, and hold it there
only until the solder ows onto and around both the compo-
nent lead and the foil.
CAUTION: Work quickly to avoid overheating the circuit
board printed foil.
d. Closely inspect the solder area and remove any excess or
splashed solder with a small wire-bristle brush.

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Only for training and service purposes.
IC Remove/Replacement
Some chassis circuit boards have slotted holes (oblong) through
which the IC leads are inserted and then bent at against the cir-
cuit foil. When holes are the slotted type, the following technique
should be used to remove and replace the IC. When working with
boards using the familiar round hole, use the standard technique
as outlined in paragraphs 5 and 6 above.
Removal
1. Desolder and straighten each IC lead in one operation by
gently prying up on the lead with the soldering iron tip as the
solder melts.
2. Draw away the melted solder with an anti-static suction-type
solder removal device (or with solder braid) before removing
the IC.
Replacement
1. Carefully insert the replacement IC in the circuit board.
2. Carefully bend each IC lead against the circuit foil pad and
solder it.
3. Clean the soldered areas with a small wire-bristle brush.
(It is not necessary to reapply acrylic coating to the areas).
"Small-Signal" Discrete Transistor
Removal/Replacement
1. Remove the defective transistor by clipping its leads as close
as possible to the component body.
2. Bend into a "U" shape the end of each of three leads remain-
ing on the circuit board.
3. Bend into a "U" shape the replacement transistor leads.
4. Connect the replacement transistor leads to the corresponding
leads extending from the circuit board and crimp the "U" with
long nose pliers to insure metal to metal contact then solder
each connection.
Power Output, Transistor Device
Removal/Replacement
1. Heat and remove all solder from around the transistor leads.
2. Remove the heat sink mounting screw (if so equipped).
3. Carefully remove the transistor from the heat sink of the circuit
board.
4. Insert new transistor in the circuit board.
5. Solder each transistor lead, and clip off excess lead.
6. Replace heat sink.
Diode Removal/Replacement
1. Remove defective diode by clipping its leads as close as pos-
sible to diode body.
2. Bend the two remaining leads perpendicular y to the circuit
board.
3. Observing diode polarity, wrap each lead of the new diode
around the corresponding lead on the circuit board.
4. Securely crimp each connection and solder it.
5. Inspect (on the circuit board copper side) the solder joints of
the two "original" leads. If they are not shiny, reheat them and
if necessary, apply additional solder.
Fuse and Conventional Resistor
Removal/Replacement
1. Clip each fuse or resistor lead at top of the circuit board hollow
stake.
2. Securely crimp the leads of replacement component around
notch at stake top.
3. Solder the connections.
CAUTION: Maintain original spacing between the replaced
component and adjacent components and the circuit board to
prevent excessive component temperatures.
Circuit Board Foil Repair
Excessive heat applied to the copper foil of any printed circuit
board will weaken the adhesive that bonds the foil to the circuit
board causing the foil to separate from or "lift-off" the board. The
following guidelines and procedures should be followed when-
ever this condition is encountered.
At IC Connections
To repair a defective copper pattern at IC connections use the
following procedure to install a jumper wire on the copper pattern
side of the circuit board. (Use this technique only on IC connec-
tions).
1. Carefully remove the damaged copper pattern with a sharp
knife. (Remove only as much copper as absolutely necessary).
2. carefully scratch away the solder resist and acrylic coating (if
used) from the end of the remaining copper pattern.
3. Bend a small "U" in one end of a small gauge jumper wire and
carefully crimp it around the IC pin. Solder the IC connection.
4. Route the jumper wire along the path of the out-away copper
pattern and let it overlap the previously scraped end of the
good copper pattern. Solder the overlapped area and clip off
any excess jumper wire.
At Other Connections
Use the following technique to repair the defective copper pattern
at connections other than IC Pins. This technique involves the
installation of a jumper wire on the component side of the circuit
board.
1. Remove the defective copper pattern with a sharp knife.
Remove at least 1/4 inch of copper, to ensure that a hazardous
condition will not exist if the jumper wire opens.
2. Trace along the copper pattern from both sides of the pattern
break and locate the nearest component that is directly con-
nected to the affected copper pattern.
3. Connect insulated 20-gauge jumper wire from the lead of the
nearest component on one side of the pattern break to the
lead of the nearest component on the other side.
Carefully crimp and solder the connections.
CAUTION: Be sure the insulated jumper wire is dressed so the
it does not touch components or sharp edges.

- 6 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement .
1. Application range
This specification is applied to the OLED TV with ED79A
chassis.
2. Requirement for Test
Each part is tested as below without special appointment.
(1) Temperature: 25 °C ± 5 °C(77 °F ± 9 °F), CST: 40 °C ± 5 °C
(2) Relative Humidity: 65 % ± 10 %
(3) Power Voltage
: Standard input voltage Standard input voltage
(100~240V@ 50/60Hz)
* Standard Voltage of each products is marked by models.
(4) Specification and performance of each parts are followed
each drawing and specification by part number in
accordance with BOM.
(5) The receiver must be operated for about 20 minutes prior
to the adjustment.
3. Test method
(1) Performance: LGE TV test method followed
(2) Demanded other specification
- Safety : CE, IEC specification
- EMC : CE, IEC specification
- Wireless : Wireless HD Specification (Option)
4. Model General Specification
No. Item Specication Remarks
1 Market EU/CIS(PAL Market-37Countries)
DTV & Analog (Total 37 countries)
DTV (MPEG2/4, DVB-T) : 26 countries
Germany, Netherland, Switzerland, Hungary, Austria, Slovenia, Bul-
garia, France, Spain, , Belgium, Luxemburg, Greece, Czech, Turkey,
Moroco, Ireland, Latvia, Estonia, Lithuania, Poland, Portugal, Romania,
Albania, Bosnia, Slovakia, Beralus
DTV (MPEG2/4, DVB-T2) :11 countries
UK(Ireland), Sweden, Denmark, Finland, Norway, Ukraine, Kazakhstan
Russia, Italy, Croatia, Serbia
DTV (MPEG2/4, DVB-C) : 37 countries
Germany, Netherland, Switzerland, Hungary, Austria, Slovenia,
Bulgaria, France, Spain, Italy, Belgium, Russia, Luxemburg, Greece,
Czech, Croatia, Turkey, Moroco, Ireland, Latvia, Estonia, Lithuania,
Poland, Portugal, Romania, Albania, Bosnia, Serbia, Slovakia, Beralus,
UK, Sweden, Denmark, Finland, Norway, Ukraine, Kazakhstan
DTV (MPEG2/4,DVB-S) : 37 countries
Germany, Netherland, Switzerland, Hungary, Austria, Slovenia, Bul-
garia, France, Spain,Belgium, Luxemburg, Greece, Czech, Turkey,
Moroco, Ireland, Latvia, Estonia, Lithuania, Poland, Portugal, Romania,
Albania, Bosnia, Slovakia, Beralus, UK(Ireland), Sweden, Denmark,
Finland, Norway, Ukraine, Kazakhstan,Russia, Italy, Croatia, Serbia
Supported satellite : 35 satellites
ABS1 75.0E , AMOS 4.0W , ASIASAT3S 105.5E , ASTRA 19.2E ,
ASTRA 23.5E , ASTRA 28.2E , ASTRA 4.8E, ATLANTIC BIRD2 8.0W ,
ATLANTIC BIRD3 5.0W , BADR 26.0E , DIRECTV-1R 56.0E , EURO-
BIRD 9A 9.0E , EUROBIRD3 33.0E , EUTELSAT 36 A/B 36.0E ,
EUTELSAT W2A 10.0E , EUTELSAT W3A 7.0E , EUTELSAT7WA 7.3W
EUTELSAT 16.0E , EXPRESS AM1 40.0E , EXPRESS AM3 140.0E ,
EXPRESS AM33 96.5E , HELLASSAT 39.0E , HISPASAT 1CDE 30.0W
HOTBIRD 13.0E , INTELSAT10&7 68.5E , INTELSAT15 85.2E , IN-
TELSAT1R 50.0W, INTELSAT903 33.5W , INTELSAT904 60.0E
, NILESAT 7.0W , NSS12 57.0E , THOR 0.8W , TURKSAT 42.0E ,
YAMAL201 90.0E , OTHER

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Only for training and service purposes.
No. Item Specication Remarks
2Broadcasting
system
1)PAL/SECAM B/G/I/D/K ,
SECAM L/L’
2)DVB-T/T2, C, S/S2
3 Program coverage
1 ) Digital TV
- VHF, UHF
- C-Band, Ku-Band
2) Analogue TV
-VHF : E2 to E12
-UHF : E21 to E69
-CATV : S1 to S20
-HYPER : S21 to S47
4 Receiving system Analog : Upper Heterodyne
Digital : COFDM, QAM
▶DVB-T
- Guard Interval(Bitrate_Mbit/s)
1/4, 1/8, 1/16, 1/32
- Modulation : Code Rate
QPSK : 1/2, 2/3, 3/4, 5/6, 7/8
16-QAM : 1/2, 2/3, 3/4, 5/6, 7/8
64-QAM : 1/2, 2/3, 3/4, 5/6, 7/8
▶DVB-T2
- Guard Interval(Bitrate_Mbit/s)
1/4, 1/8, 1/16, 1/32, 1/128, 19/128, 19/256,
- Modulation : Code Rate
QPSK : 1/2, 2/5, 2/3, 3/4, 5/6
16-QAM : 1/2, 2/5, 2/3, 3/4, 5/6
64-QAM : 1/2, 2/5, 2/3, 3/4, 5/6
256-QAM : 1/2, 2/5, 2/3, 3/4, 5/6
▶DVB-C
- Symbolrate :
4.0Msymbols/s to 7.2Msymbols/s
- Modulation :
16QAM, 64-QAM, 128-QAM and 256-QAM
▶DVB-S/S2
2. symbolrate
DVB-S2 (8PSK / QPSK) : 2 ~ 45Msymbol/s
DVB-S (QPSK) : 2 ~ 45Msymbol/s
2. iterbi
DVB-S mode : 1/2, 2/3, 3/4, 5/6, 7/8
DVB-S2 mode : 1/2, 2/3, 3/4, 3/5, 4/5, 5/6, 8/9, 9/10
5 Input Voltage AC 100 ~ 240V 50/60Hz

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Only for training and service purposes.
5. External Input Format
5.1. 2D Mode
5.1.1. Component input(Y, CB/PB, CR/PR)
No Resolution H-freq (kHz) V-freq (Hz) Pixel clock Proposed
1 720*480 15.73 60 13.5135 SDTV ,DVD 480I
2 720*480 15.73 59.94 13.5 SDTV ,DVD 480I
3 720*480 31.50 60 27.027 SDTV 480P
4 720*480 31.47 59.94 27.0 SDTV 480P
5 1280*720 45.00 60.00 74.25 HDTV 720P
6 1280*720 44.96 59.94 74.176 HDTV 720P
7 1920*1080 33.75 60.00 74.25 HDTV 1080I
8 1920*1080 33.72 59.94 74.176 HDTV 1080I
9 1920*1080 67.500 60 148.50 HDTV 1080P
10 1920*1080 67.432 59.94 148.352 HDTV 1080P
11 1920*1080 27.000 24.000 74.25 HDTV 1080P
12 1920*1080 26.97 23.976 74.176 HDTV 1080P
13 1920*1080 33.75 30.000 74.25 HDTV 1080P
14 1920*1080 33.71 29.97 74.176 HDTV 1080P
5.1.2. HDMI Input (DTV)
No Resolution H-freq (kHz) V-freq (Hz) Pixel clock(MHz) Proposed Remarks
1 640*480 31.46 59.94 25.13 SDTV 480P
2 640*480 31.50 60.00 25.13 SDTV 480P
3 720*480 15.73 59.94 13.50 SDTV, DVD 480I(525I)
Spec. out but display
4 720*480 15.75 60.00 13.51 SDTV, DVD 480I(525I)
5 720*576 15.62 50.00 13.50 SDTV, DVD 576I(625I)
50Hz
6 720*480 31.47 59.94 27.00 SDTV 480P
7 720*480 31.50 60.00 27.03 SDTV 480P
8 720*576 31.25 50.00 27.00 SDTV 576P
9 1280*720 44.96 59.94 74.18 HDTV 720P
10 1280*720 45.00 60.00 74.25 HDTV 720P
11 1280*720 37.50 50.00 74.25 HDTV 720P
12 1920*1080 28.12 50.00 74.25 HDTV 1080I
13 1920*1080 33.72 59.94 74.18 HDTV 1080I
14 1920*1080 33.75 60.00 74.25 HDTV 1080I
15 1920*1080 26.97 23.97 63.30 HDTV 1080P
16 1920*1080 27.00 24.00 63.36 HDTV 1080P
17 1920*1080 33.71 29.97 79.12 HDTV 1080P
18 1920*1080 33.75 30.00 79.20 HDTV 1080P
19 1920*1080 56.25 50.00 148.50 HDTV 1080P
20 1920*1080 67.43 59.94 148.35 HDTV 1080P
21 1920*1080 67.50 60.00 148.50 HDTV 1080P

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Only for training and service purposes.
5.1.3. HDMI Input (PC)
No Resolution H-freq (kHz) V-freq (Hz) Pixel clock(MHz) Proposed Remarks
1 640*350 31.46 70.09 25.17 EGA
2 720*400 31.46 70.08 28.32 DOS
3 640*480 31.46 59.94 25.17 VESA(VGA)
4 800*600 37.87 60.31 40.00 VESA(SVGA)
5 1024*768 48.36 60.00 65.00 VESA(XGA)
6 1152*864 54.34 60.05 80.00 VESA
7 1280*1024 63.98 60.02 109.00 VESA(SXGA) FHD only
8 1360*768 47.71 60.01 85.00 VESA(WXGA)
9 1920*1080 67.50 60.00 158.40 WUXGA(CEA 861D) FHD only
5.2. 3D Mode
5.2.1. RF Input
No Resolution H-freq (kHz) V-freq (Hz) Pixel clock Proposed 3D input proposed mode
1 1280*720 37.50 50 74.25 HDTV 720P 2D to 3D, Side by Side, Top & Bottom
2 1920*1080 28.13 50 74.25 HDTV 1080I 2D to 3D, Side by Side, Top & Bottom
5.2.2. HDMI Input (3D supported mode automatically)
No Resolution H-freq (kHz) V-freq (Hz) Pixel clock VIC 3D input proposed
mode Proposed
1 640*480
31.46 / 31.50 59.94/ 60.00 25.13/25.20 1 Top-and-Bottom
Side-by-side(half)
Secondary(SDTV 480P)
Secondary(SDTV 480P)
31.46 / 31.50 59.94/ 60.00 50.35/50.40 1 Side-by-side(Full) (SDTV 480P)
62.93 / 63.00 59.94/ 60.00 50.35/50.40 1 Frame packing
Line alternative
Secondary(SDTV 480P)
(SDTV 480P)
2 720*480
31.46 / 31.50 59.94/ 60.00 27.00/27.03 2,3 Top-and-Bottom
Side-by-side(half)
Secondary(SDTV 480P)
Secondary(SDTV 480P)
31.46 / 31.50 59.94/ 60.00 27.00/27.03 2,3 Side-by-side(Full) (SDTV 480P)
62.93 /63.00 59.94/ 60.00 54.00/54.06 2,3 Frame packing
Line alternative
Secondary(SDTV 480P)
(SDTV 480P)
3 720*576 15.62 50.00 27.00 21
Top-and-Bottom
Side-by-side(half)
Side-by-side(Full)
Frame packing
Field alternative
(SDTV 576I)
Secondary(SDTV 576I)
(SDTV 576I)
Secondary(SDTV 576I)
Secondary(SDTV 576I)
4 720*576
31.25 50.00 27.00 17,18
Top-and-Bottom
Side-by-side(half)
Side-by-side(Full)
Secondary(SDTV 576P)
Secondary(SDTV 576P)
(SDTV 576P)
62.50 50.00 54.00 17,18 Frame packing
Line alternative
Secondary(SDTV 576P)
(SDTV 576P)

- 10 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
No Resolution H-freq (kHz) V-freq (Hz) Pixel clock VIC 3D input proposed
mode Proposed
5 1280*720
37.50 50.00 74.25 19 Top-and-Bottom
Side-by-side(half)
Primary(HDTV 720P)
Primary(HDTV 720P)
37.50 50.00 148.50 19 Side-by-side(Full) (HDTV 720P)
44.96 / 45.00 59.94/ 60.00 74.17/74.25 4 Top-and-Bottom
Side-by-side(half)
Primary(HDTV 720P)
Primary(HDTV 720P)
44.96 / 45.00 59.94/ 60.00 148.35/148.50 4 Side-by-side(Full) (HDTV 720P)
75.00 50.00 148.50 19 Frame packing
Line alternative
Primary(HDTV 720P)
(HDTV 720P)
89.91/90.00 59.94/ 60.00 148.35/148.50 4 Frame packing
Line alternative
Primary(HDTV 720P)
(HDTV 720P)
6 1920*1080
28.12 50.00 74.25 20 Top-and-Bottom
Side-by-side(half)
Secondary(HDTV 1080I)
Primary(HDTV 1080I)
28.12 50.00 148.50 20 Side-by-side(Full) (HDTV 1080I)
33.72 / 33.75 59.94/ 60.00 74.17/74.25 5 Top-and-Bottom
Side-by-side(half)
Secondary(HDTV 1080I)
Primary(HDTV 1080I)
33.72 / 33.75 59.94/ 60.00 148.35/148.50 5 Side-by-side(Full) (HDTV 1080I)
56.25 50.00 148.50 20 Frame packing
Field alternative
Primary(HDTV 1080I)
(HDTV 1080I)
67.43/67.50 59.94/ 60.00 148.35/148.50 5 Frame packing
Field alternative
Primary(HDTV 1080I)
(HDTV 1080I)
7 1920*1080
26.97 / 27.00 23.97/ 24.00 74.17 / 74.25 32 Top-and-Bottom
Side-by-side(half)
Primary(HDTV 1080P)
Primary(HDTV 1080P)
26.97 / 27.00 23.97/ 24.00 148.35/148.50 32 Side-by-side(Full) (HDTV 1080P)
28.12 25.00 74.25 33 Top-and-Bottom
Side-by-side(half)
Secondary(HDTV 1080P)
Secondary(HDTV 1080P)
28.12 25.00 148.50 33 Side-by-side(Full) (HDTV 1080P)
33.71 / 33.75 29.97/ 30.00 74.18/74.25 34 Top-and-Bottom
Side-by-side(half)
Primary(HDTV 1080P)
Secondary(HDTV 1080P)
33.71 / 33.75 29.97/ 30.00 148.35/148.50 34 Side-by-side(Full) (HDTV 1080P)
43.94/54.00 23.97/ 24.00 148.35/148.50 32 Frame packing
Line alternative
Primary(HDTV 1080P)
(HDTV 1080P)
56.25 25.00 148.50 33 Frame packing
Line alternative
Secondary(HDTV 1080P)
(HDTV 1080P)
67.43 / 67.5 29.97/ 30.00 148.35/148.50 34 Frame packing
Line alternative
Primary(HDTV 1080P)
(HDTV 1080P)
56.25 50.00 148.50 31 Top-and-Bottom
Side-by-side(half)
Primary(HDTV 1080P)
Secondary(HDTV 1080P)
67.43 / 67.50 59.94/ 60.00 148.35/148.50 16 Top-and-Bottom
Side-by-side(half)
Primary(HDTV 1080P)
Secondary(HDTV 1080P)

- 11 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
5.2.3. Component Input ( 3D) (3D supported mode automatically)
No Resolution H-freq (kHz) V-freq (Hz) Pixel clock Proposed 3D input proposed mode
1 1280*720 37.50 50.00 74.25 HDTV 720P 2D to 3D,
Side by Side(half), Top & Bottom
2 1280*720 45.00 60.00 74.25 HDTV 720P 2D to 3D,
Side by Side(half), Top & Bottom
3 1280*720 44.96 59.94 74.18 HDTV 720P 2D to 3D,
Side by Side(half), Top & Bottom
4 1920*1080 33.75 60.00 74.25 HDTV 1080I 2D to 3D,
Side by Side(half), Top & Bottom
5 1920*1080 33.72 59.94 74.18 HDTV 1080I 2D to 3D,
Side by Side(half), Top & Bottom
6 1920*1080 28.12 50.00 74.25 HDTV 1080I 2D to 3D,
Side by Side(half), Top & Bottom
7 1920*1080 67.50 60.00 148.50 HDTV 1080P 2D to 3D,
Side by Side(half), Top & Bottom
8 1920*1080 67.43 59.94 148.35 HDTV 1080P 2D to 3D,
Side by Side(half), Top & Bottom
9 1920*1080 27.00 24.00 74.25 HDTV 1080P 2D to 3D,
Side by Side(half), Top & Bottom
10 1920*1080 28.12 25.00 74.25 HDTV 1080P 2D to 3D,
Side by Side(half), Top & Bottom
11 1920*1080 56.25 50.00 74.25 HDTV 1080P 2D to 3D,
Side by Side(half), Top & Bottom
12 1920*1080 26.97 23.97 74.18 HDTV 1080P 2D to 3D,
Side by Side(half), Top & Bottom
13 1920*1080 33.75 30.00 74.25 HDTV 1080P 2D to 3D,
Side by Side(half), Top & Bottom
14 1920*1080 33.71 29.97 74.18 HDTV 1080P 2D to 3D,
Side by Side(half), Top & Bottom
5.2.4. HDMI-PC Input (3D) (3D supported mode manually)
No Resolution H-freq (kHz) V-freq (Hz) Pixel clock Proposed 3D input proposed mode
1 1024*768 48.36 60.00 65.00 HDTV 768P 2D to 3D,
Side by Side(half),
Top & Bottom
2 1360*768 47.71 60.00 HDTV 768P
3 1920*1080 67.50 60.00 148.50 HDTV 1080P
2D to 3D,
Side by Side(half),
Top & Bottom,
Checker Board,
Frame Sequential,
Row Interleaving,
Column Interleaving
4 Others - - -
640*350
720*400
640*480
800*600
1152*864
2D to 3D,
Side by Side(half),
Top & Bottom

- 12 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
5.2.5. HDMI-DTV (3D supported mode manually)
No Resolution H-freq (kHz) V-freq (Hz) Pixel clock Proposed 3D input proposed mode
1 720*480 31.50 60.00 27.03 SDTV 480P 2D to 3D, Side by Side(Half),
Top & Bottom, Checker Board, Frame
Sequential, Row Interleaving, Column
Interleaving
2 720*576 31.25 50.00 27.00 SDTV 576P
3 1280*720 45.00 60.00 74.25 HDTV 720P
37.50 50.00 74.25 HDTV 720P
4 1920*1080 33.75 60.00 74.25 HDTV 1080I 2D to 3D, Side by Side(Half),
Top & Bottom
28.12 50.00 74.25 HDTV 1080I
5 1920*1080
27.00 24.00 74.25 HDTV 1080P 2D to 3D, Side by Side(Half),
Top & Bottom, Checker Board, Row
Interleaving, Column Interleaving
28.12 25.00 74.25 HDTV 1080P
33.75 30.00 74.25 HDTV 1080P
67.50 60.00 148.50 HDTV 1080P 2D to 3D, Side by Side(Half),
Top & Bottom,
Checker Board,
Single FrameSequential,
Row Interleaving,
Column Interleaving
56.25 50.00 148.50 HDTV 1080P
135.00
60.00
(HDMI1,HDMI2
Only)
594.00

- 13 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
1. USB
(1) Insert the USB memory Stick to the USB port.
(2) Automatically detect the SW Version and show the below
message
(3) Click [YES]: initiate the download and install of the update.
(4) Click [Check Now]: move to “About This TV” page for
update.
(5) TV is updating.
(6) After finished the update, below Pop-up appear.
(7) Click [Yes] : TV will be DC OFF -> ON
(8) After TV turned on, Check the updated SW Version and
Tool Option.
2. NSU
(1) Menu -> All Settings -> General -> About This TV
(2) Click [CHEK FOR UPDATES] : system check newest
version
(3) Click [DOWNLOAD AND INSTALL]
(4) TV is updating
(5) After finished the update, below Pop-up appear
(6) Turn OFF the TV and On. Check the updated SW Version
and Tool Option
SOFTWARE UPDATE

- 14 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
BLOCK DIAGRAM
1. SOC
Audio 1 AMP
Main SOC
IF (+/-)
OPTIC
LAN
DDR3 2133 X 16
(256MB X 2EA)
HDMI1 (1.4) HDMI2 (1.4)
HDMI3 (1.4)
SYSTEM EEPROM
(256Kb)
USB2 (2.0)
USB3 (2.0)
eMMC
(4GB)
Sub Micom
DDR3 2133 X 16
(128MB X 2EA)
P_TS
X_TAL
24MHz
I2S Out
AV
D-Demod : I2C 4
R
E A
R
S
I
D
E
R
E A
R
(H)
SPDIF OUT
BLUTOOTH
IR / KEY/EYE
WIFI
SUB
ASSY
IR
KEY
Tuner : I2C 6
X_TAL
25MHz
I2C
CVBS/SIF
Tuner
COMP
(ARC)
X_TAL
32.768kHz
OCP
1.5A
OCP
1.5A
USB1 (2.0) OCP
1.5A
Demod :
ATSC,
DVB-T/C,
ISDB-T
Analog Demod

- 15 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
2. Tuner + CI
MAIN
SOC
AH30 [TP_DVB_CLK]
AH32 [TP_DVB_SOP]
AH31 [TP_DVB_VAL]
AK28 [DMD_ADC_INP]
AL28 [DMD_ADC_INN]
TUNER
[FE_DEMOD1_TS_ERROR] 12
[FE_DEMOD1_TS_CLK] 14
[FE_DEMOD1_TS_SYNC] 15
[FE_DEMOD1_TS_VAL] 16
FE_DEMOD1_TS_DATA[0] 17
FE_DEMOD1_TS_DATA[1] 18
FE_DEMOD1_TS_DATA[2] 19
FE_DEMOD1_TS_DATA[3] 20
FE_DEMOD1_TS_DATA[4] 21
FE_DEMOD1_TS_DATA[5] 22
FE_DEMOD1_TS_DATA[6] 23
FE_DEMOD1_TS_DATA[7] 24
+1.2V_Demod_Core
[+3.3V_LNA_TU] 1
+3.3V_TUNER
[I2C_SCL6_TU] 4
[I2C_SDA6_TU] 5
[IF_AGC_TU] 3
[/TU_RESET1_TU] 25
FILTER
FE_DEMOD1_TS_CLK
FE_DEMOD1_TS_SYNC
FE_DEMOD1_TS_VAL
FE_DEMOD1_TS_DATA [0-7]
IF_P
IF_N
IF_AGC
ADC_I_INP
ADC_I_INN
I2C_SCL6
I2C_SDA6 33 ȳ
/TU_RESET1
AG23[SCL5] AH24[SDA5]
AH19 [GPIO26]
AM29[IFAGC]
FE_DEMOD1_TS_ERROR
[+3.3V_TUNER] 11
[D_Demod_Core] 28
[IF_P_TU] 6
[IF_N_TU] 7
AJ31 [TP_DVB_DATA0] AJ30 [TP_DVB_DATA1]
AK31 [TP_DVB_DATA2] AK33 [TP_DVB_DATA3] AK32 [TP_DVB_DATA4]
AL33 [TP_DVB_DATA5] AL32 [TP_DVB_DATA6]
AM33 [TP_DVB_DATA7]
+3.3V_TUNER
3.3Kȳ
33 ȳ
TPO_DATA[0-7] CI_IN_TS_DATA[0-7]
CI Slot
(No use)
100 ȳ
TPI_DATA [0-7] CI_TS_DATA[0-7]
/PCM_WE /PCM_OE
/PCM_IRQA
/PCM_REG
PCM_INPACK
/PCM_WAIT
PCM_RESET
CI_DATA[0-7] CI_ADDR[0-14]
/PCM_IORD /PCM_IOWR
/PCM_CE1
CI_TS_VAL
/CI_CD1,2
CI 5V
Power detect
PCM_5V_CTL +5V_CI_ON
CI_IN_TS_SYNC
CI_IN_TS_VAL
CI_IN_TS_CLK
[TPIO_DATA[ 0~7] CI_IN_TS_DATA[0-7]
[TPI_DATA 0~7] CI_TS_DATA[0~7]
/CI_CD1 /CI_CD2
P28 [CAM_CD1_N]
B23[CAM_CD2_N]
CI_TS_VALB29[TPI_VAL]
U28[CAM_CE1_N] R29[CAM_CE2_N]
/PCM_CE1 /PCM_CE2
10K ȳ
G29 [EB_BE_N1] G28 [EB_EB_N0]
/PCM_IOWR /PCM_IORD
[EB_ADDR_0~14]
[EB_DATA_0~7]
CI_ADDR[0-14] CI_DATA[0-7]
T28[CAM_RESET]
U27[CAM_WAIT_N]
T29[CAM_INPACK_N]
N29[CAM_REG_N]
V27[CAM_IREQ_N]
F30 [EB_OE_N]
G30 [EB_WE_N]
D28 [TPIO_CLK]
E28 [TPIO_VAL]
E29 [TPIO_SOP]
CI_IN_TS_CLK CI_IN_TS_VAL CI_IN_TS_SYNC PCM_RESET /PCM_WAIT PCM_INPACK /PCM_REG /PCM_IRQA /PCM_OE /PCM_WE VCC
R28 [CAM_VCCEN_N]
+5V_CI_ON +3.3V_NORMAL
47K ȳ
AH33[TP_DVB_ERR]
/PCM_CE2

- 16 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
3. Video & Audio IN/OUT
MAIN SOC
AM27 [CVBS_I32]
AV1_CVBS
AV1
Phone JACK
Component 1
Phone JACK
AV1_CVBS_IN_SOC
AL24 [SOY2_IN] AK23 [Y2_IN]
AL23 [PB2_IN] AK24 [PR2_IN]
COMP1_Pb
COMP1_Pr COMP2_Y
COMP2_Y_IN_SOC_SOY COMP2_Y_IN_SOC COMP2_PB_IN_SOC
COMP2_PR_IN_SOC
J
A
CK
A
V
A
A
1
A
CK
Jack Side SOC Side
SPDIF_OUT
SPDIF OUT
AM15 [IEC958OUT]
SPDIF_OUT_ARC AE28 [HDMI_1_ARC]
COMP1/AV1/DVI_R_IN COMP1/AV1/DVI_L_IN
AN17 [AUAD_L_CH3_IN] AM17 [AUAD_R_CH3_IN]
AUAD_R_CH3_IN
AUAD_L_CH3_IN
ARC OUT
(HDMI3)
Speaker
MICOM
AMP_RESET_N
[DAC_LRCH] [DAC_SCK] [DAC_LRCK] [I2C_SCL_1/I2C_SDA_1]
I2S
AH5 [GPIO23]
Audio
AMP
NTP7515
AMP_MUTE

- 17 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
4. HDMI 1.4
MICOM
HDCP1.4 HDCP2.2
HDMI 2
(1.4)_V
HDMI 1
(1.4)_V
CEC_REMOTE Port_2 DDC_SCL_2/ DDC_SDA_2 HDMI_HPD_2 CEC_REMOTE Port_1 DDC_SCL_4/DDC_SDA_4 HDMI_HPD_4
HDCP1.4 HDCP2.2
+5V +5V
HDCP1.4 HDCP2.2
HDMI 3
(1.4)_H
ARC
CEC_REMOTE Port_3 DDC_SCL_1/DDC_SDA_1 SPDIF_OUT_ARC HDMI_HPD_1
[HDMI_HPD_4]
[HDMI_4_SCL]
[HDMI_4_SDA]
[HDMI_2_HPD]
[HDMI_2_SDA]
[HDMI_2_SCL]
[HDMI_1_HPD]
[HDMI_1_SCL]
[HDMI_1_SDA]
[HDMI_1_ARC]
+5V
MAIN SOC

- 18 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
5. USB / Wi-Fi / M-Remote / UART
IR + Wi-Fi /BT
Wafer 8P
[UART0_RXD]
USB_DP3/DM3
RS232 IC
WIFI_DP / DM
MICOM
WOL/WIFI_POWER_ON
[USB2_0_DP0/DM0]
SOC_RX/TX
[USB3_DP1/DM1]
USB_DP2/DM2 USB_DP1/DM1
[USB3_DP0 / DM0]
JK6800 RS232C phone Jack
SOC_RX/TX UART wafer
SOC_RX/TX
USB 1
(2.0)_V
USB 2
(2.0)_V
USB 3
(2.0)_H
WIFI_EN
+3.5V_WIFI
OCP
USB_CTL3
+5V_USB_1
OCP
[EB_CS2] USB_CTL2
+5V_USB_2
OCP
[HUB_VBUS_CTRL0] USB_CTL1
+5V_USB_3
[UART0_TXD]
MAIN SOC
[USB2_1_DP0/DM0] [EB_CS0]

- 19 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
6. I2C Map
+3.3V_NORMAL
ZUZr˟
NVRAM
ZUZr˟
+3.3V_NORMAL
ZZ˟
+3.3V_NORMAL
YU^r˟
AUDIO AMP
TUNER (Demod)
XUYr˟
+3.3V_TU
ZZ˟
MAIN SOC
MICOM
ZZ˟LNB (No use)
IR / KEY/EYE
XWW˟
ZUZr˟
EYE_SDA
EYE_SCL
+3.5V_ST
18pF
Cap Ready
I2C_SCL5: AH10 [SCL4]
I2C_SDA5: AJ10 [SDA4]
I2C_SCL_MICOM_SOC: AH9 [SCL1]
I2C_SDA_MICOM_SOC: AG9 [SDA1]
I2C_SCL4: AH22 [SCL3]
I2C_SDA4: AJ22 [SDA3]
I2C_SCL1: AH11[SCL0]
I2C_SDA1: AG11[SDA0]
I2C_SCL2: AG10 [SCL2]
I2C_SDA2: AJ9 [SDA2]
I2C_SCL6: AG23 [SCL5]
I2C_SDA6: AH24 [SDA5] Tuner
ZUZr˟
+3.3V_TU
ZZ˟
47pF
+3.3V_NORMAL
ZUZr˟
T-CON,L/DIMING
33pF
XWWG˟

- 20 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
200
LV1
400
121
810 120
530
540
521
570
571
900
710
AR2
920
700
500
A10
EXPLODED VIEW
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These
parts are identified by in the EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
IMPORTANT SAFETY NOTICE