LG 43LF63 Series User manual

Printed in KoreaP/NO : MFL68679804 (1502-REV00)
CHASSIS : LD51H
MODEL : 43LF63**
43LF63**-Z* 43LF631V-TB
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
LED TV
SERVICE MANUAL
North/Latin America http://aic.lgservice.com
Europe/Africa http://eic.lgservice.com
Asia/Oceania http://biz.lgservice.com
Internal Use Only

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Only for training and service purposes
CONTENTS
CONTENTS .............................................................................................. 2
SAFETY PRECAUTIONS ........................................................................ 3
SERVICING PRECAUTIONS.................................................................... 4
SPECIFICATION ....................................................................................... 6
ADJUSTMENT INSTRUCTION .............................................................. 10
BLOCK DIAGRAM ................................................................................. 18
EXPLODED VIEW .................................................................................. 28
SCHEMATIC CIRCUIT DIAGRAM ........................................... APPENDIX
TROUBLE SHOOTING GUIDE ................................................ APPENDIX

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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
Schematic Diagram and 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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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.

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SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement .
1. Application range
This specification is applied to the LED TV used LD51H
chassis.
2. Requirement for Test
Each part is tested as below without special appointment.
(1) Operating Temperature: 0 °C to 40 °C
(2) Operating Humidity: Less than 80 %
(3) Storage Temperature : -20 °C to 60 °C
(4) Storage Humidity : Less than 85 %
(5) Power Voltage
: Standard input voltage (AC 100-240 V~, 50/60 Hz)
Standard Voltage of each products is marked by models.
(6) Specification and performance of each parts are followed
each drawing and specification by part number in
accordance with BOM.
(7) The receiver must be operated for about 5 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
4. Model General Specification
No. Item Specication Remarks
1 Market EU(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,
Morocco, Ireland, Latvia, Estonia, Lithuania, Poland, Portugal, Roma-
nia, Albania, Bosnia, Slovakia, Belarus
DTV (MPEG2/4, DVB-T2): 11 countries
UK(Ireland), Sweden, Denmark, Finland, Norway, Ukraine, Kazakh-
stan, 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, Morocco, Ireland, Latvia, Estonia, Lithuania,
Poland, Portugal, Romania, Albania, Bosnia, Serbia, Slovakia, Belarus,
UK, Sweden, Denmark, Finland, Norway, Ukraine, Kazakhstan
DTV (MPEG2/4,DVB-S): 37 countries
Germany, Netherland, Switzerland, Hungary, Austria, Slovenia, Bulgar-
ia, France, Spain, Belgium, Luxemburg, Greece, Czech, Turkey, Mo-
rocco, Ireland, Latvia, Estonia, Lithuania, Poland, Portugal, Romania,
Albania, Bosnia, Slovakia, Belarus, 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, ATLAN-
TIC BIRD3 5.0W, BADR 26.0E, DIRECTV-1R 56.0E, EUROBIRD 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, INTELSAT1R
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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No. Item Specication Remarks
2 Television system
1) Digital TV
- DVB-T/T2
- DVB-C
- DVB-S/S2
2) Analogue TV
- PAL/SECAM B/G/I/D/K
- SECAM L/L’
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 (Model : *L*V*-Z* (T2 only Model))
- 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
- symbolrate
DVB-S2 (8PSK / QPSK) : 2 ~ 45 Msymbol/s
DVB-S (QPSK) : 2 ~ 45 Msymbol/s
- viterbi
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 Scart (1EA) PAL, SECAM Scart 1 Jack is Full scart and support ATV/DTV-OUT
(not support DTV Auto AV)
6 Video Input RCA (1EA) PAL, SECAM, NTSC4.43 4 System : PAL, SECAM, NTSC4.43, PAL60
Hybrid Type
7 Head phone out Antenna, AV1, AV2, Component, HDMI1,
HDMI2, HDMI3, USB1, USB2, USB3
8 Component Input (1EA) Y/Cb/Cr
Y/Pb/Pr Hybrid Type
9 HDMI Input (3EA)
HDMI1-DTV
HDMI2-DTV
HDMI3-DTV
HDMI1: PC support(HDMI version 1.3)
Support HDCP
10 Audio Input (3EA) DVI Audio, Component/AV2, AV1 L/R Input.
11 SDPIF out (1EA) SPDIF out
12 USB (1EA) EMF, DivX HD, For SVC (download) JPEG, MP3, DivX HD
13 Ethernet Connect (1EA) Ethernet Connect
14 PCMCIA Card slot (1EA) PCMCIA slot

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5. Component Video Input (Y, Pb, Pr)
No. Specication
Resolution H-freq(kHz) V-freq(Hz) Pixel clock
1. 720×480 15.73 60.00 SDTV, DVD 480i
2. 720×480 15.63 59.94 SDTV, DVD 480i
3. 720×480 31.47 59.94 480p
4. 720×480 31.50 60.00 480p
5. 720×576 15.625 50.00 SDTV, DVD 625 Line
6. 720×576 31.25 50.00 HDTV 576p
7. 1280×720 45.00 50.00 HDTV 720p
8. 1280×720 44.96 59.94 HDTV 720p
9. 1280×720 45.00 60.00 HDTV 720p
10. 1920×1080 31.25 50.00 HDTV 1080i
11. 1920×1080 33.75 60.00 HDTV 1080i
12. 1920×1080 33.72 59.94 HDTV 1080i
13. 1920×1080 56.250 50 HDTV 1080p
14. 1920×1080 67.5 60 HDTV 1080p

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6.2. PC mode
No. Resolution H-freq(kHz) V-freq.(Hz) Proposed Remarks
1 640 x 350 @70Hz 31.468 70.09 EGA
2 720 x 400 @70Hz 31.469 70.08 DOS
3 640 x 480 @60Hz 31.469 59.94 VESA(VGA)
4 800 x 600 @60Hz 37.879 60.31 VESA(SVGA)
5 1024 x 768 @60Hz 48.363 60.00 VESA(XGA)
6 1152 x 864 @60Hz 54.348 60.053 VESA
7 1280 x 1024 @60Hz 63.981 60.020 VESA(SXGA) FHD only
8 1360 x 768 @60Hz 47.712 60.015 VESA(WXGA)
9 1920 x 1080 @60Hz 67.5 60.00 WUXGA(CEA 861D) FHD only
6. HDMI Input
6.1. DTV mode
No. Resolution H-freq(kHz) V-freq.(Hz) Proposed Remarks
1. 640*480 31.469 59.94 SDTV 480P
2. 648*480 31.5 60.00 SDTV 480P
3. 720*480 15.73 59.97 SDTV, DVD 480I(525I)
Spec. out but display4. 720*480 15.75 60 SDTV, DVD 480I(525I)
5. 720*576 15.625 50 SDTV, DVD 576I(625I) 50Hz
6. 720*480 31.47 59.94 SDTV 480P
7. 720*480 31.5 60 SDTV 480P
8. 720*576 31.25 50 SDTV 576P
9. 1280*720 44.96 59.94 HDTV 720P
10. 1280*720 45 60 HDTV 720P
11. 1280*720 37.5 50 HDTV 720P
12. 1920*1080 28.125 50 HDTV 1080I
13. 1920*1080 33.72 59.94 HDTV 1080I
14. 1920*1080 33.75 60.00 HDTV 1080I
15. 1920*1080 26.97 23.976 HDTV 1080P
16. 1920*1080 27.00 24.000 HDTV 1080P
17. 1920*1080 33.71 29.97 HDTV 1080P
18. 1920*1080 33.75 30.00 HDTV 1080P
19. 1920*1080 56.25 50.00 HDTV 1080P
20. 1920*1080 67.432 59.94 HDTV 1080P
21. 1920*1080 67.5 60.00 HDTV 1080P

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ADJUSTMENT INSTRUCTION
1. Application Range
This specification sheet is applied to all of the LED TV with
LD51H chassis.
2. Designation
(1) Because this is not a hot chassis, it is not necessary to
use an isolation transformer. However, the use of isolation
transformer will help protect test instrument.
(2) Adjustment must be done in the correct order.
(3) The adjustment must be performed in the circumstance of
25 °C ± 5 °C of temperature and 65 % ± 10 % of relative
humidity if there is no specific designation.
(4) The input voltage of the receiver must keep AC 100-240
V~, 50/60 Hz.
(5) The receiver must be operated for about 5 minutes prior to
the adjustment when module is in the circumstance of over
15.
In case of keeping module is in the circumstance of 0 °C, it
should be placed in the circumstance of above 15 °C for 2
hours.
In case of keeping module is in the circumstance of below
-20 °C, it should be placed in the circumstance of above 15
°C for 3 hours.
[Caution]
When still image is displayed for a period of 20 minutes or
longer (Especially where W/B scale is strong. Digital pattern
13ch and/or Cross hatch pattern 09ch), there can some
afterimage in the black level area.
3. Automatic Adjustment
3.1. MAC address D/L, CI+ key D/L, Widevine
key D/L, ESN D/L, HDCP14/20 D/L, DTCP
Connect: USB port
Communication Prot connection
▪ Com 1,2,3,4 and 115200(Baudrate)
Mode check: Online Only
▪ Check the test process: DETECT → MAC → ESN →
Widevine → CI → HDCP14 → HDCP20
▪ Play: Press Enter key
▪ Result: Ready, Test, OK or NG
▪ Printer Out (MAC Address Label)
3.2. LAN Inspection
3.2.1. Equipment & Condition
▪ Each other connection to LAN Port of IP Hub and Jig
3.2.2. LAN inspection solution
▪ LAN Port connection with PCB
▪ Setting automatic IP
▪ If you want manual connection, enter Network connection at
MENU Mode of TV. Press Start connection key, then
Network will be connected.
3.2.3. WIDEVINE key Inspection
- Confirm key input data at the "IN START" MENU Mode.


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3.3. LAN PORT INSPECTION(PING TEST)
Connect SET → LAN port == PC → LAN Port
3.3.1. Equipment setting
(1) Play the LAN Port Test PROGRAM.
(2) Input IP set up for an inspection to Test Program.
*IP Number : 12.12.2.2
3.3.2. LAN PORT inspection(PING TEST)
(1) Play the LAN Port Test Program.
(2) Connect each other LAN Port Jack.
(3) Play Test (F9) button and confirm OK Message.
(4) Remove LAN cable.
3.4. Model name & Serial number Download
3.4.1. Model name & Serial number D/L
▪Press "P-ONLY" key of service remote control.
(Baud rate : 115200 bps)
▪Connect RS-232C Signal to USB Cable to USB.
▪Write Serial number by use USB port.
▪Must check the serial number at Instart menu.
3.4.2. Method & notice
(1) Serial number D/L is using of scan equipment.
(2) Setting of scan equipment operated by Manufacturing
Technology Group.
(3) Serial number D/L must be conformed when it is produced
in production line, because serial number D/L is mandatory
by D-book 4.0.
* Manual Download (Model Name and Serial Number)
If the TV set is downloaded by OTA or service man, sometimes
model name or serial number is initialized.(Not always)
It is impossible to download by bar code scan, so It need
Manual download.
1) Press the "Instart" key of Adjustment remote control.
2) Go to the menu "7.Model Number D/L" like below photo.
3) Input the Factory model name(ex 55LF630V-ZA) or Serial
number like photo.
4) Check the model name Instart menu. → Factory name
displayed. (ex 55LF630V-ZA)
5) Check the Diagnostics.(DTV country only) → Buyer
model displayed. (ex 55LF630V-ZA)
3.5. CI+ Key checking method
- Check the Section 3.1
Check whether the key was downloaded or not at ‘In Start’
menu. (Refer to below).
=> Check the Download to CI+ Key value in LGset.
3.5.1. Check the method of CI+ Key value
(1) Check the method on Instart menu
(2) Check the method of RS232C Command
1) Into the main ass’y mode(RS232: aa 00 00)
2) Check the key download for transmitted command
(RS232: ci 00 10)
3) Result value
- Normally status for download : OKx
- Abnormally status for download : NGx
3.5.2. Check the method of CI+ key value(RS232)
1) Into the main ass’y mode(RS232: aa 00 00)
2) Check the mothed of CI+ key by command
(RS232: ci 00 20)
3) Result value
i 01 OK 1d1852d21c1ed5dcx
3.6. WIFI MAC ADDRESS CHECK
(1) Using RS232 Command
(2) Check the menu on in-start
SET PC
CMD 1 CMD 2 Data 0
A A 0 0
CMD 1 CMD 2 Data 0
C I 1 0
CMD 1 CMD 2 Data 0
A A 0 0
CMD 1 CMD 2 Data 0
C I 2 0
CI+ Key Value
H-freq(kHz) V-freq.(Hz)
Transmission [A][I][][Set ID][][20][Cr] [O][K][X] or [NG]

- 12 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
4. Manual Adjustment
* ADC adjustment is not needed because of OTP(Auto ADC
adjustment)
4.1. EDID DATA
4.1.1. 2D EDID
▪ Reference
- HDMI1 ~ HDMI3
- In the data of EDID, bellows may be different by S/W or
Input mode.
ⓐProduct ID
ⓑSerial No: Controlled on production line.
ⓒMonth, Year: Controlled on production line:
ex) Monthly : ‘01’ → ‘01’
Year : ‘2013’ → ‘17’
ⓓModel Name(Hex): LGTV
ⓔChecksum(LG TV): Changeable by total EDID data.
ⓕVendor Specific(HDMI)
4.2. White Balance Adjustment
4.2.1. Overview
▪ W/B adj. Objective & How-it-works
(1) Objective: To reduce each Panel's W/B deviation
(2) How-it-works : When R/G/B gain in the OSD is at 192, it
means the panel is at its Full Dynamic Range. In order to
prevent saturation of Full Dynamic range and data, one
of R/G/B is fixed at 192, and the other two is lowered to
find the desired value.
(3) Adjustment condition : normal temperature
1) Surrounding Temperature : 25 °C ± 5 °C
2) Warm-up time: About 5 Min
3) Surrounding Humidity : 20 % ~ 80 %
4) Before White balance adjustment, Keep power on
status, don’t power off
4.2.2. Adj. condition and cautionary items
(1) Lighting condition in surrounding area surrounding lighting
should be lower 10 lux., Try to isolate adj. area into dark
surrounding
(2) Probe location: Color Analyzer (CA-210) probe should be
within 10 cm and perpendicular of the module surface
(80°~ 100°)
(3) Aging time
1) After Aging Start, Keep the Power ON status during 5
Minutes.
2) In case of LCD, Back-light on should be checked using
no signal or Full-white pattern.
4.2.3. Equipment
(1) Color Analyzer: CA-210 (NCG: CH 9 / WCG: CH12 / LED:
CH14)
(2) Adjustment Computer (During auto adj., RS-232C protocol
is needed)
(3) Adjustment Remote control
(4) Video Signal Generator MSPG-925F 720p/204-Gray
(Model: 217, Pattern: 49)
▪ Color Analyzer Matrix should be calibrated using CS-1000.
4.2.4. Equipment connection MAP
HEX EDID Table DDC Function
0001 0100 Analog
0001 0100 Digital
Chassis MODEL NAME(HEX)
LD51H 00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20
ⓔ1ⓔ2
8 bit
ⓔ3
10 bit
HDMI1 40 1B D4
HDMI2 40 0B C4
HDMI3 40 FB B4
INPUT MODEL NAME(HEX)
HDMI1 67 03 0C 00 10 00 80 1E
HDMI2 67 03 0C 00 20 00 80 1E
HDMI3 67 03 0C 00 30 00 80 1E
Color Analyzer
Computer
* Pattern Generator
RS-232C
USB to RS-232C RS-232C
Probe
Signal Source
* If TV internal pattern is used, not needed

- 13 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
4.2.5. Adj. Command (Protocol)
<Command Format>
- LEN: Number of Data Byte to be sent
- CMD: Command
- VAL: FOS Data value
- CS: Checksum of sent data
- A: Acknowledge
Ex) [Send: JA_00_DD] / [Ack: A_00_okDDX]
▪ RS-232C Command used during auto-adjustment.
Ex) wb 00 00 → Begin white balance auto-adj.
wb 00 10 → Gain adj.
ja 00 ff → Adj. data
jb 00 c0
...
...
wb 00 1f → Gain adj. completed
*(wb 00 20(Start), wb 00 2f(end)) → Off-set adj.
wb 00 ff → End white balance auto-adj.
▪ Adj. Map
Applied Model : LD51H Chassis ALL MODELS
4.2.6. Adjustment method
(1) Auto adjustment method
1) Set TV in adj. mode using P-Only key(or POWER ON key).
2) Place optical probe on the center of the display.
- It need to check probe condition of zero calibration
before adjustment.
3) Connect RS-232C Cable.
4) Select mode in ADJ Program and begin a adjustment
5) When WB adjustment is completed with OK message,
check adjustment status of pre-set mode(Cool, Medium,
Warm)
6) Remove probe and RS-232C cable.
▪ W/B Adj. must begin as start command “wb 00 00” , and
finish as end command “wb 00 ff”, and Adj. offset if need.
(2) Manual adjustment method
1) Set TV in Adj. mode using POWER ON.
2) Zero Calibrate the probe of Color Analyzer, then place it
on the center of LCD module within 10 cm of the surface.
3) Press ADJ key → EZ adjust using adj. R/C → 11. White-
Balance then press the cursor to the right(key ►).
(When right key(►) is pressed 206 Gray internal pattern
will be displayed)
4) Adjust Cool modes
①Fix the one of R/G/B gain to 192 (default data) and
decrease the others.
(If G gain is adjusted over 172 and R and B gain less
than 192 , Adjust is O.K.)
②If G gain is less than 172,
Increase G gain by up to 172, and then increase R
gain and G gain same amount of increasing G gain.
③If R gain or B gain is over 255,
Readjust G gain less than 172, Conform to R gain is
255 or B gain is 255
5) Adjust two modes (Medium/Warm) Fix the one of R/G/B
gain to 192 (default data) and decrease the others.
6) Adj. is completed, Exit adjust mode using “EXIT” key on
Remote control.
4.2.7. Reference (White balance Adj. coordinate and
color temperature)
▪ Luminance : 204 Gray
▪ Standard color coordinate and temperature using CS-1000
(over 26 inch)
▪ Standard color coordinate and temperature using CA-210(CH 14)
START 6E A 50 A LEN A 03 A CMD A 00 A VAL A CS STOP
RS-232C COMMAND
[CMD ID DATA] Explanation
wb 00 00 Begin White Balance adjustment
wb 00 10 Gain adjustment(internal white pattern)
wb 00 1f Gain adjustment completed
wb 00 20 Offset adjustment(internal white pattern)
wb 00 2f Offset adjustment completed
wb 00 ff End White Balance adjustment
(internal pattern disappears )
Adj. item Command
(lower caseASCII)
Data Range
(Hex.)
Default
(Decimal)
CMD1 CMD2 MIN MAX
Cool
R Gain j g 00 C0
G Gain j h 00 C0
B Gain j i 00 C0
R Cut
G Cut
B Cut
Medium
R Gain j a 00 C0
G Gain j b 00 C0
B Gain j c 00 C0
R Cut
G Cut
B Cut
Warm
R Gain j d 00 C0
G Gain j e 00 C0
B Gain j f 00 C0
R Cut
G Cut
Mode Coordinate Temp ∆uv
x y
Cool 0.271 0.270 13000 K 0.0000
Medium 0.286 0.289 9300 K 0.0000
Warm 0.313 0.329 6500 K 0.0000
Mode Coordinate Temp ∆uv
x y
Cool 0.271 ± 0.002 0.270 ± 0.002 13000 K 0.0000
Medium 0.286 ± 0.002 0.289 ± 0.002 9300 K 0.0000
Warm 0.313 ± 0.002 0.329 ± 0.002 6500K 0.0000

- 14 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
4.2.8. LED White balance table
- EDGE LED module change color coordinate because of
aging time.
- Apply under the color coordinate table, for compensated
aging time.
Only march to December & Global
Model: (normal line)LGD
Only January to Febuary & Global
Model: (normal line)LGD
O/S Module (AUO, INX, Sharp, CSOT, BOE) (Cool : 13000 K)
4.3. Local Dimming Inspection
(1) Press “TILT” key of the Adj. Remote control and check
moving patern. The black bar patterns moves from top to
bottom. If a local dimming function does not work, a whole
screen shows full white.
4.4. Magic Remote control test
- Results are automatically marked in Instart OSD after
through the AP/Magic Remocon Equipment on the line
4.5. Function Inspect
4.5.1. HDMI ARC Function Inspection
(1) Test equipment
- Optic Receiver Speaker
- MSHG-600 (SW: 1220 ↑)
- HDMI Cable (for 1.4 version)
(2) Test method
1) Insert the HDMI Cable to the HDMI ARC port from the
master equipment (HDMI 1)
2) Check the sound from the TV Set
NC4.0
Aging
time
(Min)
Cool Medium Warm
x y x y x y
271 270 286 289 313 329
1 0-2 282 289 297 308 324 348
2 3-5 281 287 296 306 323 346
3 6-9 279 284 294 303 321 333
4 10-19 277 280 292 299 319 339
5 20-35 275 277 290 296 317 336
6 36-49 274 274 289 293 316 333
7 50-79 273 272 288 291 315 331
8 80-119 272 271 287 290 314 330
9 Over 120 271 270 286 289 313 329
NC4.0
Aging
time
(Min)
Cool Medium Warm
x y x y x y
271 270 286 289 313 329
1 0-5 286 295 301 314 328 354
2 6-10 284 290 299 309 326 349
3 11-20 282 287 297 306 324 346
4 21-30 279 283 294 302 321 342
5 31-40 276 278 291 297 318 337
6 41-50 274 275 289 294 316 334
7 51-80 273 272 288 291 315 331
8 81-119 272 271 287 290 314 330
9 Over 120 271 270 286 289 313 329
NC4.0 Cool Medium Warm
x y x y x y
spec 271 270 286 289 313 329
target 278 280 293 299 320 339

- 15 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
3) Check the Sound from the Speaker or using AV & Optic
TEST program. (It’s connected to MSHG-600)
* Remark: Inspect in Power Only Mode and check SW version
in a master equipment
4.5.2. EYE-Q Green Function Inspection
Step 1) Turn on the TV.
Step 2) Press 'EYE' key on the adjustment remote-control.
Step 3) Cover 'Eye Q sensor' on the front of set with your
hands, hold it for 6 seconds.
Step 4) Check "the Sensor Data" on the screen, make certain
that Data is below 10. If Data isn’t below 10 in 6
seconds, Eye Q sensor would be bad. You should
change Eye Q sensor.
Step 5) Uncover your hands from Eye Q sensor, hold it for 6
seconds.
Step 6) Check "Back Light(xxx)" on the screen, check data
increase . You should change Eye Q sensor.
4.6. Wi-Fi Test
Step 1) Turn on TV
Step 2) Select Wi-Fi Connection option in Network Menu.
Step 3) Click Off Button to On in Wi-Fi Connection.
Step 4) The system finds any AP like blow PIC.
Step 5) Select the AP you want to connect.

- 16 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
4.7. LNB voltage and 22KHz tone check
(only for DVB-S/S2 model)
▪ Test method
(1) Set TV in Adj. mode using POWER ON.
(2) Connect cable between satellite ANT and test JIG.
(3) Press Yellow key(ETC+SWAP) in Adj Remote control to
make LNB on.
(4) Check LED light ‘ON’ at 18 V menu.
(5) Check LED light ‘ON’ at 22 KHz tone menu.
(6) Press Blue key(ETC+PIP INPUT) in Adj Remote control
to make LNB off.
(7) Check LED light ‘OFF’ at 18 V menu.
(8) Check LED light ‘OFF’ at 22 KHz tone menu.
▪ Test result
(1) After press LNB On key, ‘18 V LED’ and ‘22 KHz tone
LED’ should be ON.
(2) After press LNB OFF key, ‘18 V LED’ and ‘22 KHz tone
LED’ should be OFF.
4.8. Option selection per country
4.8.1. Overview
- Option selection is only done for models in Non-EU
4.8.2. Method
(1) Press ADJ key on the Adj. R/C, then select Country Group
Meun.
(2) Select Country Group Code 04 or Country Group EU.
5. Tool Option selection
▪ Method : Press "ADJ" key on the Adjustment remote control,
then select Tool option.
6. Ship-out mode check(In-stop)
After final inspection, press "IN-STOP" key of the Adjustment
remote control and check that the unit goes to Stand-by mode.
7. GND and Internal Pressure check
7.1. Method
(1) GND & Internal Pressure auto-check preparation
- Check that Power cord is fully inserted to the SET.
(If loose, re-insert)
(2) Perform GND & Internal Pressure auto-check
- Unit fully inserted Power cord, Antenna cable and A/V
arrive to the auto-check process.
- Connect D-terminal to AV JACK TESTER
- Auto CONTROLLER(GWS103-4) ON
- Perform GND TEST
- If NG, Buzzer will sound to inform the operator.
- If OK, changeover to I/P check automatically.
(Remove CORD, A/V form AV JACK BOX.)
- Perform I/P test
- If NG, Buzzer will sound to inform the operator.
- If OK, Good lamp will lit up and the stopper will allow the
pallet to move on to next process.
7.2. Checkpoint
▪ TEST voltage
(1) DQA Test
- GND: 1.5 KV / min at 100 mA
- SIGNAL: 3 KV / min at 100 mA
(2) Mass Production Line Test
- GND: AC 1.5 KV / sec, Cut off current not exceed 100 mA
▪ TEST time: DQA 1 min, Mass Production Line 1 sec
▪ TEST POINT
- GND TEST = POWER CORD GND & SIGNAL CABLE
METAL GND
- Internal Pressure TEST = POWER CORD GND & LIVE &
NEUTRAL
▪ LEAKAGE CURRENT: At 0.5 mArms
8. Audio
Measurement condition:
(1) RF input: Mono, 1 KHz sine wave signal, 100 % Modulation
(2) CVBS, Component: 1 KHz sine wave signal 0.5 Vrms
No. Item Min Typ Max Unit Remark
1.
Audio practical
max Output, L/R
(Distortion=10%
max Output)
9 10 12 W
EQ Off
AVL Off
Clear Voice Off
8.10 10.8 Vrms
2. Speaker (6Ω
Impedance) 9 10 12 W
MODEL Module Tool
Option 1
Tool
Option 2
Tool
Option 3
Tool
Option 4
Tool
Option 5
Tool
Option 6
Tool
Option 7
43LF63** LGD 2007 4626 169 64774 25254 3658 43727

- 17 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
9. USB S/W Download(Service only)
(1) Put the USB Stick to the USB socket.
(2) Go to General menu then enter to About This TV.
(3) Enter the USB EXPERT MODE.
(4) Updating is starting.
(5) Updating completed, the TV will restart automatically
(6) If your TV is turned on, check your updated version and
Tool option. (explain the Tool option, next stage)
* If downloading version is more new than your TV have,
TV can lost all channel data. In this case, you have to
channel recover. if all channel data is cleared, you didn’t
have a DTV/ATV test on production line.
* After downloading, have to adjust Tool Option again.
(1) Push "IN-START" key in service remote control.
(2) Select "Tool Option 1" and push "OK" key.
(3) Punch in the number. (Each model has their number)

- 18 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
Audio AMP
NTP7515
IC101
M14+
IF (+/-)
USB1
OPTIC
LAN
DDR3 1600 X 16
(512MB X 2EA)
HDMI1 HDMI2
HDMI3
Digital Demod(T/C)
SYSTEM EEPROM
(256Kb)
USB2 USB3
41P 51P
eMMC
(4GB)
Sub Micom
(RENESAS
R5F1000G)
DDR3 1600 X 16
(512MB X 2EA)
P_TS
50P 50P
X_TAL
24MHz
A B
X_TAL
32.768KHz
I2S Out
I2C 1
EPI
I2C 2
LVDS
USB 2.0
I2C 5
H/P (Line Out)
AV/COMP
SCART
D-Demod : I2C 4
OCP
1.5A
OCP
1.5A
(ARC)
R
E A
R
S
I
D
E S
I
D
E
R
E A
R
(H)
AMP
TI
CVBS/YPbPr
CVBS/RGB
SPDIF OUT
ETHERNET
I2C 3
LOCAL DIMMING
BLUETOOTH
IR / KEY/EYE
PM
IC
WIFI
SUB
ASSY
I2C 2
IR
KEY
UART_BT
(IR Bla Ready)
Tuner : I2C 6
LAN
PHY
OCP
1A
X_TAL
25MHz
I2C(EYE)
DVB T2/C/S2 TUNER
Si2178B
RDA
5815M
ATV /
DVB-T/C
DVB-S
SIF/CVBS
TS_ [0:7]
Si2169C
DIF
IQ
Si2178B
ATV / DVB-T/C SIF/CVBS
DVB T/C TUNER
CI Slot
P_TS
P_TS
P_TS P_TS
HDMI Rx.
HDMI / MHL Rx.
USB 2.0
LNB
DVB-S : I2C 4
USB_WIFI
IF CVBS / SIF
BLOCK DIAGRAM
1. Over all

- 19 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
33Ω
+3.3V_NORMAL
3.3KΩ
TUNER (T2 Demod)
3.3KΩ
+3.3V_TUNER
I2C_SDA3
I2C_SCL3
I2C_SDA1
I2C_SCL1
IC6900
LNB
33Ω
22Ω
33Ω
+3.3V_NORMAL
3.3KΩ
IC7700
PMIC
I2C_SDA2
I2C_SCL2
+3.3V_NORMAL
3.3KΩ
IC5600
NTP7533(AMP)
I2C_SDA0
I2C_SCL0
0 Ω
P7400
Local dimming 33Ω
IC103
NVRAM
3.3KΩ
+3.3V_NORMAL
I2C_SDA4
I2C_SCL4
33Ω
I2C_SDA5
I2C_SCL5 TUNER
3.3KΩ
+3.3V_TUNER
33Ω
IC101
M14+
IR / KEY/EYE
100Ω
+3.5V_ST
3.3KΩ
IC3000
Renesas MICOM
EYE_I2C_SDA
EYE_I2C_SCL
2. I2C

- 20 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
3. Power