LG 55LA66 Series User manual

Printed in KoreaP/NO : MFL67727008(1302-REV00)
CHASSIS : LB33B
MODEL : 55LA66** 55LA66**-T*
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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CONTENTS
CONTENTS .............................................................................................. 2
SAFETY PRECAUTIONS ........................................................................ 3
SERVICING PRECAUTIONS .................................................................... 4
SPECIFICATION ....................................................................................... 6
ADJUSTMENT INSTRUCTION .............................................................. 12
BLOCK DIAGRAM ................................................................................. 19
EXPLODED VIEW .................................................................................. 20
SCHEMATIC CIRCUIT DIAGRAM ..............................................................

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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 MΩ and 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.

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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 LB33B
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 (AC 100-240 V~, 50/60 Hz)
* 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
4. Model General Specification
No. Item Specication Remarks
1 Market Asia, Oceania, Africa, Middle East
(PAL/DVB Market)
Australia/New Zealand(AU), Singapore(SG),
Indonesia(ID),Malaysia(MY), Vietnam(VN), South
Africa(ZA), Iran(IR)- Considering for Israel(IL)
only Analog for A-ASIA
2 Broadcasting system
1) PAL/SECAM-B/G/D/K
2) PAL-I/II
3) NTSC-M
4) DVB-T
PAL for NZ/SG
3 Channel Storage ATV – 135EA, DTV – 1000EA
4 Receiving system Analog : Upper Heterodyne
Digital : COFDM(DVB-T)
► 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
5. Video Input RCA PAL, SECAM, NTSC 4 System : PAL, SECAM, NTSC, PAL60
6 Component Input Y/Pb/Pr
7 Head phone out Antenna, AV1, Component, HDMI1,
HDMI2, HDMI3, USB1, USB2, USB3
8 HDMI Input HDMI1-DTV,HDMI2-DTV
HDMI3-DTV
PC(HDMI Ver. 1.4)
Support HDCP
9 Audio Input
DVI Audio
Component
AV1
10 SPDIF out SPDIF out
11 USB Input For My Media(Movie/Photo/Music List)
or For SVC

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5. Component Video Input (Y, Pb, Pr)
No. Resolution H-freq(kHz) V-freq(Hz) Propose
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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Only for training and service purposes
6.2. PC mode
No. Resolution H-freq(kHz) V-freq(Hz) Propose Remark
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 VESA(XGA)
6 1152 x 864 @60Hz 54.348 60.053 VESA
7 1280 x 1024 @60Hz 63.981 60.02 VESA(SXGA) FHD only(Support to HDMI-PC)
8 1360 x 768 @60Hz 47.712 60.015 VESA(WXGA)
9 1920 x 1080 @60Hz 67.5 60 WUXGA(Reduced Blanking) FHD only
No. Resolution H-freq(kHz) V-freq(Hz) Pixel clock(MHz) Propose
1 640*480 31.469 / 31.5 59.94 / 60 SDTV 480P
2 720*480 31.469 / 31.5 59.94 / 60 27.00/27.03 SDTV 480P
3 720*576 31.25 50 54 SDTV 576P
4 720*576 15.625 50 SDTV 576I
5 1280*720 37.500 50 74.25 HDTV 720P
6 1280*720 44.96 / 45 59.94 / 60 74.17/74.25 HDTV 720P
7 1920*1080 33.72 / 33.75 59.94 / 60 74.17/74.25 HDTV 1080I
8 1920*1080 28.125 50.00 74.25 HDTV 1080I
9. 1920*1080 26.97 / 27 23.97 / 24 74.17/74.25 HDTV 1080P
10 1920*1080 25 HDTV 1080P
11 1920*1080 33.716/ 33.75 29.976/30.00 74.25 HDTV 1080P
12 1920*1080 56.250 50 148.5 HDTV 1080P
13 1920*1080 67.43 / 67.5 59.94 / 60 148.35/148.50 HDTV 1080P
6. HDMI Input
6.1. DTV mode

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Only for training and service purposes
No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) VIC 3D input proposed mode Proposed
1
640*480
31.469 / 31.5 59.94/ 60 25.125 / 25.2 1 Top-and-Bottom
Side-by-side(half)
Secondary(SDTV 480P)
Secondary(SDTV 480P)
2 62.938 / 63 59.94 / 60 50.35 / 50.4 1 Frame packing
Line alternative
Secondary(SDTV 480P)
(SDTV 480P)
3 31.469 / 31.5 59.94 / 60 50.35 / 50.4 1 Side-by-side(Full) (SDTV 480P)
4
720*480
31.469 / 31.5 59.94 / 60 27.00/27.03 2,3 Top-and-Bottom
Side-by-side(half)
Secondary(SDTV 480P)
Secondary(SDTV 480P)
5 62.938 / 63 59.94 / 60 54 / 54.06 2,3 Frame packing
Line alternative
Secondary(SDTV 480P)
(SDTV 480P)
6 31.469 / 31.5 59.94 / 60 54 / 54.06 2,3 Side-by-side(Full) (SDTV 480P)
7
720*576
31.25 50 27 17,18 Top-and-Bottom
Side-by-side(half)
Secondary(SDTV 576P)
Secondary(SDTV 576P)
8 62.5 50 54 17,18 Frame packing
Line alternative
Secondary(SDTV 576P)
(SDTV 576P)
9 31.25 50 54 17,18 Side-by-side(Full) (SDTV 576P)
10
720*576
15.625 50 27 21 Top-and-Bottom
Side-by-side(half)
Secondary(SDTV 576I)
Secondary(SDTV 576I)
11 31.25 50 54 21 Frame packing
Field alternative
Secondary(SDTV 576I)
(SDTV 576I)
12 15.625 50 54 21 Side-by-side(Full) (SDTV 576I)
13
1280*720
37.500 50 74.25 19 Top-and-Bottom
Side-by-side(half)
Primary(HDTV 720P)
Primary(HDTV 720P)
14 75 50 148.5 19 Frame packing
Line alternative
Primary(HDTV 720P)
(HDTV 720P)
15 37.5 50 148.5 19 Side-by-side(Full) (HDTV 720P)
16 44.96 / 45 59.94 / 60 74.18/74.25 4 Top-and-Bottom
Side-by-side(half)
Primary(HDTV 720P)
Primary(HDTV 720P)
17 89.91 / 90 59.94 / 60 148.35/148.5 4 Frame packing
Line alternative
Primary(HDTV 720P)
(HDTV 720P)
18 44.96 / 45 59.94 / 60 148.35/148.5 4 Side-by-side(Full) (HDTV 720P)
19
1920*1080
33.72 / 33.75 59.94 / 60 74.18/74.25 5 Top-and-Bottom
Side-by-side(half)
Secondary(HDTV 1080I)
Primary(HDTV 1080I)
20 67.432 / 67.5 59.94 / 60 148.35/148.5 5 Frame packing
Field alternative
Primary(HDTV 1080I)
(HDTV 1080I)
21 33.72 / 33.75 59.94 / 60 148.35/148.5 5 Side-by-side(Full) (HDTV 1080I)
22 28.125 50.00 74.25 20 Top-and-Bottom
Side-by-side(half)
Secondary(HDTV 1080I)
Primary(HDTV 1080I)
23 56.25 50.00 148.5 20 Frame packing
Field alternative
Primary(HDTV 1080I)
(HDTV 1080I)
24 28.125 50.00 148.5 20 Side-by-side(Full) (HDTV 1080I)
25 26.97 / 27 23.97 / 24 74.18/74.25 32 Top-and-Bottom
Side-by-side(half)
Primary(HDTV 1080P)
Primary(HDTV 1080P)
26 43.94 / 54 23.97 / 24 148.35/148.5 32 Frame packing
Line alternative
Primary(HDTV 1080P)
(HDTV 1080P)
27 26.97 / 27 23.97 / 24 148.35/148.5 32 Side-by-side(Full) (HDTV 1080P)
28 28.125 25 74.25 33 Top-and-Bottom
Side-by-side(half)
Secondary(HDTV 1080P)
Secondary(HDTV 1080P)
29 56.25 25 148.5 33 Frame packing
Line alternative
Secondary(HDTV 1080P)
(HDTV 1080P)
30 28.125 25 148.5 33 Side-by-side(Full) (HDTV 1080P)
31 33.716 / 33.75 29.976 / 30.00 74.18/74.25 34 Top-and-Bottom
Side-by-side(half)
Primary(HDTV 1080P)
Secondary(HDTV 1080P)
32 67.432 / 67.5 29.976 / 30.00 148.35/148.5 34 Frame packing
Line alternative
Primary(HDTV 1080P)
(HDTV 1080P)
33 33.716 / 33.75 29.976 / 30.00 148.35/148.5 34 Side-by-side(Full) (HDTV 1080P)
34 56.25 50 148.5 31 Top-and-Bottom
Side-by-side(half)
Primary(HDTV 1080P)
Secondary(HDTV 1080P)
35 67.43 / 67.5 59.94 / 60 148.35/148.50 16 Top-and-Bottom
Side-by-side(half)
Primary(HDTV 1080P)
Secondary(HDTV 1080P)
7. 3D Mode
7.1. HDMI 1.4b

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Only for training and service purposes
7.2. HDMI Input(1.3)
No. Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) Proposed 3D input proposed mode
1 1280*720 45.00 60.00 74.25 HDTV 720P 2D to 3D, Side by Side(half),
Top & Bottom, Single Frame Sequential
2 1280*720 37.500 50 74.25 HDTV 720P
3 1920*1080 33.75 60.00 74.25 HDTV 1080I 2D to 3D, Side by Side(half),
Top & Bottom
4 1920*1080 28.125 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
6 1920*1080 28.12 25 74.25 HDTV 1080P
7 1920*1080 33.75 30.00 74.25 HDTV 1080P
8 1920*1080 67.50 60.00 148.5 HDTV 1080P 2D to 3D, Side by Side(half),
Top & Bottom, Checkerboard,
Single Frame Sequential,
Row Interleaving, Column Interleaving
9 1920*1080 56.250 50 148.5 HDTV 1080P
No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) 3D input proposed mode Proposed
1 1024*768 48.36 60 65 2D to 3D, Side by Side(half)
Top & Bottom HDTV 768P
2 1360*768 47.71 60 85.5 2D to 3D, Side by Side(half)
Top & Bottom HDTV 768P
3 1920*1080 67.50 60 148.50
2D to 3D, Side by Side(half)
Top & Bottom, Checker Board,
Single Frame Sequential,
Row Interleaving,
Column Interleaving
HDTV 1080P
4 Others - - - 2D to 3D
640*350
720*400
640*480
800*600
1152*864
7.3. HDMI-PC Input (3D supported mode manually)
No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed 3D input proposed mode
1 1920*1080 33.75 30 74.25 HDTV 1080P
2D to 3D, Side by Side(Half)*,
Top & Bottom*, Checkerboard*,
Row Interleaving, Column Interleaving
(Photo : side by Side(half), Top & Bottom)
Others - - -
640*350
720*400
640*480
800*600
1152*864
1280*1024
2D to 3D
7.4. USB Input (3D supported mode manually)
(“*” 3D supported mode manually & automatically)

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Only for training and service purposes
No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock Proposed 3D input proposed mode
1 1280*720 45.00 60.00 74.25 HDTV 720P
2D to 3D, Side by Side(Half), Top & Bottom
2 1280*720 37.500 50 74.25 HDTV 720P
3 1920*1080 33.75 60.00 74.25 HDTV 1080I
4 1920*1080 28.125 50.00 74.25 HDTV 1080I
5 1920*1080 27.00 24.00 74.25 HDTV 1080P
6 1920*1080 28.12 25 74.25 HDTV 1080P
7 1920*1080 33.75 30.00 74.25 HDTV 1080P
8 1920*1080 67.50 60.00 148.5 HDTV 1080P
9 1920*1080 56.250 50 148.5 HDTV 1080P
7.8. Component Input(3D) (3D supported mode manually)
7.7. DLNA Input (3D supported mode manually)
No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed 3D input proposed mode
1 1920*1080 33.75 30 74.25 HDTV 1080p
2D to 3D, Side by Side(Half)*,Top & Bot-
tom, Row Interleaving, Column Interleaving
(Photo : Side by Side(Half), Top&Bottom)
7.9. 3D Input mode
No. Side by Side Top & Bottom Checker board Single Frame
Sequential
Frame
Packing 2D to 3D
1
ii.
iii.
iv. v.
vi.
7.6. RF Input (3D supported mode automatically)
No. Signal 3D input proposed mode
1 Frame Compatible Side by Side(Half),
Top & Bottom
7.5. RF Input(3D supported mode manually)
No. Resolution Proposed 3D input proposed mode
1 HD 1080I
720P
2D to 3D
Side by Side(Half)
Top & Bottom
2 SD 576P
576I 2D to 3D

- 12 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
ADJUSTMENT INSTRUCTION
1. Application Range
This specification sheet is applied to all of the LED TV with
LB33B 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 °C.
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, HDCP1.4/HDCP2.0
key D/L,Widevine key D/L, ESN D/L
Connect: USB port
Communication Prot connection
▪ Com 1,2,3,4 and 115200(Baudrate)
Mode check: Online Only
▪ Check the test process: DETECT -> MAC -> Widevine ->
ESN -> 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.
▪ Setting state confirmation
- If automatic setting is finished, you confirm IP and MAC
Address at ‘in start’ menu mode.


- 13 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
3.2.3. WIDEVINE key Inspection
- Confirm key input data at the "IN START" MENU Mode.
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 42LM7600-TA) or Serial
number like photo.
4) Check the model name Instart menu. → Factory name
displayed. (ex 42LM7600-TA)
5) Check the Diagnostics.(DTV country only) → Buyer
model displayed. (ex 42LM7600-TA)
3.5. WIFI MAC ADDRESS CHECK
(1) Using RS232 Command
(2) Check the menu on in-start

SET PC
H-freq(kHz) V-freq.(Hz)
Transmission [A][I][][Set ID][][20][Cr] [O][K][X] or [NG]

- 14 - 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. 3D 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)
1) Deep color (module 10bit)
2) None deep color (module 8bit)
4.1.2. 2D EDID(FHD)
▪ 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 : ‘2012’ → ‘16’
ⓓ Model Name(Hex): LGTV
ⓔ Checksum(LG TV): Changeable by total EDID data.
ⓕ Vendor Specific(HDMI)
4.1.3. 2D EDID(HD)
HEX EDID Table DDC Function
0001 0100 Analog
0001 0100 Digital
Chassis MODEL NAME(HEX)
LB33B 00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20
ⓔ1ⓔ2
10bit
ⓔ2
8bit ⓔ3
HDMI1 E8 85 CC X
HDMI2 E8 75 BC X
HDMI3 E8 65 AC X
INPUT MODEL NAME(HEX)
HDMI1 78 03 0C 00 10 00 B8 2D 20 C0 0E 01 4F 3F FC 08 10 18 10 06 10 16 10 28 10
HDMI2 78 03 0C 00 20 00 B8 2D 20 C0 0E 01 4F 3F FC 08 10 18 10 06 10 16 10 28 10
HDMI3 78 03 0C 00 30 00 B8 2D 20 C0 0E 01 4F 3F FC 08 10 18 10 06 10 16 10 28 10
INPUT MODEL NAME(HEX)
HDMI1 78 03 0C 00 10 00 80 1E 20 C0 0E 01 4F 3F FC 08 10 18 10 06 10 16 10 28 10
HDMI2 78 03 0C 00 20 00 80 1E 20 C0 0E 01 4F 3F FC 08 10 18 10 06 10 16 10 28 10
HDMI3 78 03 0C 00 30 00 80 1E 20 C0 0E 01 4F 3F FC 08 10 18 10 06 10 16 10 28 10
0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
0x00 00 FF FF FF FF FF FF 00 1E 6D ⓐ ⓑ
0x01 ⓒ01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26
0x02 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 81 80
0x03 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
0x04 45 00 40 84 63 00 00 1E 66 21 50 B0 51 00 1B 30
0x05 40 70 36 00 40 84 63 00 00 1E 00 00 00 FD 00 3A
0x06 3E 1E 53 10 00 0A 20 20 20 20 20 20 ⓓ
0x07 ⓓ01 ⓔ1
0x00 02 03 3A F1 4E 10 9F 04 13 05 14 03 02 12 20 21
0x01 22 15 01 29 3D 06 C0 15 07 50 09 57 07 ⓕ
0x02 ⓕ
0x03 ⓕE3 05 00 00 02 3A 80 18 71 38
0x04 2D 40 58 2C 45 00 40 84 63 00 00 1E 01 1D 80 18
0x05 71 1C 16 20 58 2C 25 00 40 84 63 00 00 9E 01 1D
0x06 00 72 51 D0 1E 20 6E 28 55 00 40 84 63 00 00 1E
0x07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ⓔ2
0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
0x00 00 FF FF FF FF FF FF 00 1E 6D ⓐ ⓑ
0x01 ⓒ01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26
0x02 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 81 80
0x03 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
0x04 45 00 A0 5A 00 00 00 1E 66 21 50 B0 51 00 1B 30
0x05 40 70 36 00 40 5A 00 00 00 1E 00 00 00 FD 00 3A
0x06 3E 1E 53 10 00 0A 20 20 20 20 20 20 ⓓ
0x07 ⓓ01 ⓔ1
0x00 02 03 29 F1 4E 10 9F 04 13 05 14 03 02 12 20 21
0x01 22 15 01 29 3D 07 50 15 07 50 09 57 07 ⓕ
0x02 ⓕ03 05 00 00 01 1D 80 18 71 1C 16
0x03 20 58 2C 25 00 A0 5A 00 00 00 9E 01 1D 00 85 51
0x04 D0 1A 20 6E 88 55 00 A0 5A 00 00 00 1A 02 3A 80
0x05 18 71 38 2D 40 58 2C 45 00 A0 5A 00 00 00 1E 66
0x06 21 50 B0 51 00 1B 30 40 70 36 00 A0 5A 00 00 00
0x07 1E 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ⓔ2
0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
0x00 00 FF FF FF FF FF FF 00 1E 6D ⓐ ⓑ
0x01 ⓒ01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26
0x02 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 01 01
0x03 01 01 01 01 01 01 66 21 50 B0 51 00 1B 30 40 70
0x04 36 00 40 84 63 00 00 1E 64 19 00 40 41 00 26 30
0x05 18 88 03 06 40 84 63 00 00 18 00 00 00 FD 00 3A
0x06 3E 1E 53 10 00 0A 20 20 20 20 20 20 ⓓ
0x07 ⓓ01 ⓔ1
0x00 02 03 25 F1 4E 10 1F 04 93 05 14 03 02 12 20 21
0x01 22 15 01 29 15 07 50 09 57 07 3D 06 C0 ⓕ
0x02 ⓕ01 1D 80 18 71 1C 16 20 58 2C 25
0x03 00 40 84 63 00 00 9E 01 1D 00 BC 52 D0 1E 20 B8
0x04 28 55 40 40 84 63 00 00 1E 8C 0A D0 8A 20 E0 2D
0x05 10 10 3E 96 00 40 84 63 00 00 18 02 3A 80 18 71
0x06 38 2D 40 58 2C 45 00 40 84 63 00 00 1E 00 00 00
0x07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ⓔ2
HEX EDID Table DDC Function
0001 0100 Analog
0001 0100 Digital
Chassis MODEL NAME(HEX)
LD33B 00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20
ⓔ1ⓔ2ⓔ3
HDMI1 43 8A X
HDMI2 43 7A X
HDMI3 43 6A X
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

- 15 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
▪ 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) Surrounding Humidity : 20 % ~ 80 %
4.2.2. Equipment
(1) Color Analyzer: CA-210 (LED Module : CH 14)
(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)
→ Only when internal pattern is not available
▪ Color Analyzer Matrix should be calibrated using CS-100.
4.2.3. Equipment connection MAP
4.2.4. 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 : LB33B Chassis ALL MODELS
START 6E A 50 A LEN A 03 A CMD A 00 A VAL A CS STOP
Co lo r An alyzer
Co mp ut er
Pat tern Generat or
RS -2 32C
RS-2 32C
RS-2 32C
Probe
Signal Source
* If TV internal pattern is used, not needed
RS-232C COMMAND
[CMD ID DATA] Explantion
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
HEX EDID Table DDC Function
0001 0100 Analog
0001 0100 Digital
Chassis MODEL NAME(HEX)
LD33B 00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20
ⓔ1ⓔ2ⓔ3
HDMI1 A3 E2 X
HDMI2 A3 D2 X
HDMI3 A3 C2 X
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

- 16 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
4.2.5. Adj. method
(1) Auto adj. method
1) Set TV in adj. mode using POWER ON key.
2) Zero calibrate probe then place it on the center of the
Display.
3) Connect Cable.(RS-232C to USB)
4) Select mode in adj. Program and begin adj.
5) When adj. is complete (OK Sign), check adj. status pre
mode. (Warm, Medium, Cool)
6) Remove probe and RS-232C cable to complete adj.
▪ 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 → 7. White-
Balance then press the cursor to the right(key ►).
(When right key(►) is pressed 204 Gray internal pattern
will be displayed)
4) One of R Gain / G Gain / B Gain should be fixed at 192,
and the rest will be lowered to meet the desired value.
5) Adjustment is performed in COOL, MEDIUM, WARM 3
modes of color temperature.
▪ If internal pattern is not available, use RF input. In EZ
Adj. menu 7.White Balance, you can select one of 2
Test-pattern: ON, OFF. Default is inner(ON). By selecting
OFF, you can adjust using RF signal in 204 Gray pattern.
▪ Adjustment 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
- After Aging Start, Keep the Power ON status during 5
Minutes.
- In case of LCD, Back-light on should be checked
using no signal or Full-white pattern.
4.2.6. 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)
4.2.7. LED White balance table
- EDGE LED module change color coordinate because of
aging time.
- Apply under the color coordinate table, for compensated
aging time.
* Normal Line
[LN5xxx, LA6xxx, LA7xxx, LA8xxx]
*Aging Chamber
[LN5xxx, LA6xxx, LA7xxx, LA8xxx]
Mode Coordinate Temp ∆uv
x y
Cool 0.269 0.273 13000 K 0.0000
Medium 0.285 0.293 9300 K 0.0000
Warm 0.313 0.329 6500 K 0.0000
Mode Coordinate Temp ∆uv
x y
Cool 0.269 ± 0.002 0.273 ± 0.002 13000 K 0.0000
Medium 0.285 ± 0.002 0.293 ± 0.002 9300 K 0.0000
Warm 0.313 ± 0.002 0.329 ± 0.002 6500K 0.0000
NC4.0
Aging
time
(Min)
Cool Medium Warm
X y x y x y
271 270 285 293 313 329
1 0-2 281 287 295 310 320 342
2 3-5 280 285 294 308 319 340
3 6-9 278 284 292 307 317 339
4 10-19 276 281 290 304 315 336
5 20-35 275 277 289 300 314 332
6 36-49 274 274 288 297 313 329
7 50-79 273 272 287 295 312 327
8 80-119 272 271 286 294 311 326
9 Over 120 271 270 285 293 310 325
NC4.0
Aging
time
(Min)
Cool Medium Warm
X y x y x y
271 270 285 293 313 329
1 0-5 280 285 294 308 319 340
2 6-10 276 280 290 303 315 335
3 11-20 272 275 286 298 311 330
4 21-30 269 272 283 295 308 327
5 31-40 267 268 281 291 306 323
6 41-50 266 265 280 288 305 320
7 51-80 265 263 279 286 304 318
8 81-119 264 261 278 284 303 316
9 Over 120 264 260 278 283 303 315

- 17 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
4.3. Local Dimming Function Check
Step 1) Turn on TV.
Step 2) At the Local Dimming mode, module Edge Backlight
moving right to left Back light of IOP module moving.
Step 3) Confirm the Local Dimming mode.
Step 4) Press "exit" key.
4.4. Magic Motion Remote control test
- Equipment : RF Remote control for test, IR-KEY-Code
Remocon for test
- You must confirm the battery power of RF-Remote control
before test(recommend that change the battery per every lot)
- Sequence (test)
a) If you select the ‘start key(Wheel Key)’ on the controller,
you can pairing with the TV SET.
b) You can check the cursor on the TV Screen, when select
the ‘Wheel Key’ on the controller
c) You must remove the pairing with the TV Set by select
‘Mute Key’ on the controller
4.5. 3D function test
(Pattern Generator MSHG-600, MSPG-6100[Support HDMI1.4])
* HDMI mode NO. 872 , pattern No.83
(1) Please input 3D test pattern like below.
(2) When 3D OSD appear automatically, then select OK key.
(3) Don't wear a 3D Glasses, check the picture like below.
4.6. Wi-Fi Test
Step 1) Turn on TV
Step 2) Select Network Connection option in Network Menu.
Step 3) Select Start Connection button in Network Connection.
Step 4) If the system finds any AP like blow PIC, it is working
well.

- 18 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
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
- GND: 1.5 KV / min at 100 mA
- SIGNAL: 3 KV / min at 100 mA
▪ TEST time: 1 second
▪ 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
(3) RGB PC: 1 KHz sine wave signal 0.7 Vrms
9. USB S/W Download(Service only)
(1) Put the USB Stick to the USB socket
(2) Automatically detecting update file in USB Stick
- If your downloaded program version in USB Stick is
Lower, it didn’t work.
But your downloaded version is Higher, USB data is
automatically detecting (Download Version High & Power
only mode, Set is automatically Download)
(3) Show the message “Do not unplug!”
(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 high 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)
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 (8Ω
Impedance) 9 10 12 W

- 19 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
Audio AMP
LGE2122
T/C Demod
IF (+/-)
USB1
OPTIC
LAN
DDR
HDMI1 HDMI2
HDMI3
(MHL)
Analog Demod
SYSTEM EEPROM
HDMI MUX
Air/ Cable
LNB
USB2 USB3
eMMC
Sub Micom
DDR3
50P 50P
X_TAL
TUNER
A B
X_TAL
EPI
USB
H/P
AV/COMP
OCP
OCP
(HDD)
MHL
IC
R E A R
S I D E S I D E
R E A R (H)
AMP
CVBS/YPbPr
CVBS/RGB
SPDIF OUT
ETHERNET
LOCAL DIMMING
BLUTOOTH
IR
PM IC
LEVEL SHIFTER
WIFI
KEY
LOGO LIGHT
SUB ASSY
UART
USB_WIFI
OCP
SPI
BLOCK DIAGRAM

- 20 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
A22 A10 AT1
AG1
900
200
400
410
540
820
521
530
910
120
560
300
570
590
500
301
510
121
LV1 LV2
* Set + Stand * Stand Base + Body
A2
EXPLODED VIEW
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 X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
IMPORTANT SAFETY NOTICE