LG 55LW540S User manual

P/NO : MFL69569607 (1605-REV00)
CHASSIS : LA6ES
MODEL : 55LW540S 55LW540S-UA
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
LED TV
SERVICE MANUAL
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 ............................................................... 9
TROUBLE SHOOTING GUIDE............................................................... 15
BLOCK DIAGRAM.................................................................................. 23
EXPLODED VIEW .................................................................................. 24
DISASSEMBLY ....................................................................................... 25

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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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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 precautions.
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 mod-
ule 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 discharging
wrist strap device, which should be removed to prevent poten-
tial 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 solder
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 electri-
cally shorted together by conductive foam, aluminum foil or
comparable conductive material).
7. Immediately before removing the protective material from the
leads of a replacement ES device, touch the protective material
to the chassis or circuit assembly into which the device will be
installed.
CAUTION: Be sure no power is applied to the chassis or circuit,
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 appropriate
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 remaining
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 whenever
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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Only for training and service purposes
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement .
1. Application range
This spec sheet is applied LED TV with LA6ES 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 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 specification
4. General Specification
No Item Specication Result Remark
1. Receiving System ATSC / NTSC-M / 64 & 256 QAM
2. Available Channel 1) VHF : 02~13
2) UHF : 14~69
3) DTV : 02-69
4) CATV : 01~135
5) CADTV : 01~135
3. Input Voltage AC 100 ~ 240V 50/60Hz Mark : 110V, 60Hz (N.America)
4. Market NORTH AMERICA
5. Screen Size 60/65 inch Wide (1920 × 1080) FHD + 120Hz All models without HD models
42/43/49/55 inch Wide (1920 × 1080) FHD + 60Hz All models without HD models
28/32 inch Wide (1366 × 768) HD + 60Hz
79 inch Wide(3840 × 2160) UHD +240Hz
65 inch Wide(3840 × 2160) UHD +120Hz
43/49/55 inch Wide(3840 × 2160) UHD +60Hz
6. Aspect Ratio 16:9
7. Tuning System FS
8. Module LC320DXE-FJM1 LGD 32LW340C/H-UA
LC430DUE-FJM1 LGD 43LW340C/H-UA, 43LW540S-UA
LC490DUE-FJM1 LGD 49LW340C/H-UA, 49LW540S-UA
LC550EUE-FJM1 LGD 55LW340C/H-UA, 55LW540S-UA
HC320DXN-SLVS5 LGD 32LW300C-UA
9. Operating Environment 1) Temp : 0 ~ 40 deg
2) Humidity : ~ 80 %
10. Storage Environment 1) Temp : -20 ~ 60 deg
2) Humidity : ~ 85 %

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Only for training and service purposes
5. Supported video resolutions
5.1. RGB Input (PC)
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed DDC
1 640*350 31.46 70.09 25.17 EGA X
2 720*400 31.46 70.08 28.32 DOS O
3 640*480 31.46 59.94 25.17 VESA(VGA) O
4 800*600 37.87 60.31 40.00 VESA(SVGA) O
5 1024*768 48.36 60.00 65.00 VESA(XGA) O
6 1152*864 54.34 60.05 81.62 VESA O
7 1360*768 47.71 60.01 85.50 VESA (WXGA) O
8 1280*1024 63.98 60.02 108.0 VESA (SXGA) O
9 1920*1080 67.50 60.00 148.5 HDTV 1080P O
5.2. Component input(Y, CB/PB, CR/PR)
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed Remark
1 720*480 15.73 60.00 13.513 SDTV ,DVD 480I
2 720*480 15.73 59.94 13.500 SDTV ,DVD 480I
3 720*480 31.50 60.00 27.027 SDTV 480P
4 720*480 31.47 59.94 27.000 SDTV 480P
5 1280*720 45.00 60.00 74.250 HDTV 720P
6 1280*720 44.96 59.94 74.176 HDTV 720P
7 1920*1080 33.75 60.00 74.250 HDTV 1080I
8 1920*1080 33.72 59.94 74.176 HDTV 1080I
9 1920*1080 67.50 60.00 148.500 HDTV 1080P
10 1920*1080 67.432 59.94 148.352 HDTV 1080P
11 1920*1080 27.00 24.00 74.250 HDTV 1080P
12 1920*1080 26.97 23.976 74.176 HDTV 1080P
13 1920*1080 33.75 30.00 74.250 HDTV 1080P
14 1920*1080 33.71 29.97 74.176 HDTV 1080P

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Only for training and service purposes
5.3. HDMI Input 1 (PC/DTV)
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed Remark
PC (DVI) DDC
1 640*350 31.46 70.09 25.17 EGA X
2 720*400 31.46 70.08 28.32 DOS O
3 640*480 31.46 59.94 25.17 VESA(VGA) O
4 800*600 37.87 60.31 40.00 VESA(SVGA) O
5 1024*768 48.36 60.00 65.00 VESA(XGA) O
6 1152*864 54.34 60.05 81.62 VESA O
7 1360*768 47.71 60.01 85.50 VESA (WXGA) O
8 1280*1024 63.98 60.02 108.0 VESA (SXGA) O
9 1920*1080 67.50 60.00 148.5 HDTV 1080P O
10 3840*2160 54 24.00 297.00 UDTV 2160P O Only UHD Model
11 3840*2160 56.25 25.00 297.00 UDTV 2160P O Only UHD Model
12 3840*2160 67.5 30.00 297.00 UDTV 2160P O Only UHD Model
13 4096*2160 53.95 23.97 296.703 UDTV 2160P O Only UHD Model
14 4096*2160 54.00 24.00 297.00 UDTV 2160P O Only UHD Model
DTV
1 640*480 31.46 59.94 27.00 SDTV 480P
2 640*480 31.50 60.00 27.027 SDTV 480P
3 720*480 31.50 60.00 27.027 SDTV 480P
4 720*480 31.47 59.94 27.00 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 67.50 60.00 148.50 HDTV 1080P
10 1920*1080 67.43 59.94 148.352 HDTV 1080P
11 1920*1080 27.00 24.00 74.25 HDTV 1080P
12 1920*1080 26.97 23.97 74.176 HDTV 1080P
13 1920*1080 33.75 30.00 74.25 HDTV 1080P
14 1920*1080 33.71 29.97 74.176 HDTV 1080P
15 3840*2160 53.95 23.98 297.00 UDTV 2160P UHD only
16 3840*2160 54.00 24.00 297.00 UDTV 2160P UHD only
17 3840*2160 56.25 25.00 297.00 UDTV 2160P UHD only
18 3840*2160 61.43 29.97 297.00 UDTV 2160P UHD only
19 3840*2160 67.50 30.00 297.00 UDTV 2160P UHD only
20 3840*2160 135.00 59.94 593.41 UDTV 2160P UHD only
21 3840*2160 135.00 60.00 594.00 UDTV 2160P UHD only
22 4096*2160 53.95 23.98 297.00 UDTV 2160P UHD only
23 4096*2160 54.00 24.00 297.00 UDTV 2160P UHD only
24 4096*2160 56.25 25.00 297.00 UDTV 2160P UHD only
25 4096*2160 61.43 29.97 297.00 UDTV 2160P UHD only
26 4096*2160 67.50 30.00 297.00 UDTV 2160P UHD only
27 4096*2160 135.00 59.94 593.41 UDTV 2160P UHD only
28 4096*2160 135.00 60.00 594.00 UDTV 2160P UHD only

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Only for training and service purposes
ADJUSTMENT INSTRUCTION
1. Application
This spec. sheet applies to LA6ES Chassis applied LED TV all
models manufactured in TV factory.
2. Specification
(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 ±5 ºC of temperature and 65±10% of relative humidity if
there is no specific designation
(4) The input voltage of the receiver must keep 100~240V,
50/60Hz
(5) At first Worker must turn on the SET by using Power Only
key.
(6) The receiver must be operated for about 5 minutes prior to
the adjustment when module is in the circumstance of over
15 ºC
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. Adjustment items
3.1. Main PCBA Adjustments
(1) ADC adjustment : ADC adjustment is OTP (Auto ADC)
(2) EDID download : HDMI
■ Above adjustment items can be also performed in Final
Assembly if needed.
Both Board-level and Final assembly adjustment items can
be check using In-Start Menu (1.Adjust Check).
Component 1080p and RGB-PC Adjust will be calculated by
480i adjust value
3.2. Final assembly adjustment
(1) White Balance adjustment
(2) RS-232C functionality check
(3) Factory Option setting per destination
(4) Shipment mode setting (In-Stop)
(5) GND and HI-POT test
3.3. Appendix
(1) Shipment conditions
(2) Tool option menu
(3) USB Download (S/W Update, Option and Service only)
(4) Preset CH Information
4. MAIN PCBA Adjustments
4.1. ADC Adjustment
4.1.1. Overview
▪ ADC adjustment is needed to find the optimum black level
and gain in Analog-to-Digital device and to compensate RGB
deviationI
4.1.2. Equipment & Condition
(1) Protocol: RS-232C
(2) Inner Pattern
- Resolution : 1024*768(RGB)
- Pattern : Horizontal 100% Color Bar Pattern
- Pattern level : 0.7±0.1 Vp-p
4.1.3. Adjustment
4.1.3.1. Adjustment method
- Connect to Jig by using RS-232(USB), adjust RGB
* Manual adj (If needed in Final Assembly)
- Required equipment : Adjustment R/C
- Enter Service Mode by pushing “ADJ” key,
- Start ‘OTP’ ADC Type by pushing ‘►’ key at [7. ADC
Calibration]
4.1.3.2. Adj. protocol (only Internal patten)
Protocol CMD 1 CMD 2 Data 1 Data 2 Remark
Enter adj
mode
a a 00 00 When transfer the
‘Mode In’,Carry the
command.
Start
ADC adj
a d 00 10 Automatically
adjustment (Use
internal pattern)
4.1.3.3. ADC RGB
(1) Press the In-start Key on the ADJ remote after at least 1
min of signal reception. Then, select ADC Calibration. And
Press OK Button on the menu “Start”. The adjustment will
start automatically.
(2) If ADC RGB is successful, “ADC RGB Success” is
displayed and ADC RGB is completed. If ADC calibration is
failure, “ADC RGB Fail” is displayed.
(3) If ADC calibration is failure, after rechecking ADC pattern
or condition, retry calibration

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Only for training and service purposes
4.2. EDID Download
4.2.1. Overview
▪ It is a VESA regulation. A PC or a MNT will display an
optimal resolution through information sharing without any
necessity of user input. It is a realization of “Plug and Play”.
4.2.2. Equipment
(1) Since EDID data is embedded, EDID download JIG, HDMI
cable is not need.
(2) Adjust by using remote controller
4.2.3. Download method
(1) Press Adj. key on the Adj. R/C.
(2) Select EDID D/L menu.
(3) By pressing Enter key, EDID download will begin
(4) If Download is successful, OK is display, but If Download is
failure, NG is displayed.
(5) If Download is failure, Re-try downloads.
※Caution : When EDID Download, must remove HDMI
Cable.
4.2.3.1. Models for EDID Data
DTS
Ver 0.10
not Deep Color, DTS + AC3 + PCM
2D
8Bit_HD 8Bit_FHD
RGB 86 FE
HDMI1 6D8D E58D
HDMI2 6D7D E57D
AC3
Ver 0.10
not Deep Color, AC3 + PCM
2D
8Bit_HD 8Bit_FHD
RGB 86 FE
HDMI1 6D96 E596
HDMI2 6D86 E586
PCM
Ver 0.10
not Deep Color, PCM
2D
8Bit_HD 8Bit_FHD
RGB 86 FE
HDMI1 6D08 E508
HDMI2 6DF8 E5F8
5. Final Assembly Adjustment
5.1. White Balance Adjustment
5.1.1. Overview
5.1.1.1. 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.
- Case : Cool Mode
To adjust the white balance without the saturation, G
gain should be adjust at least 172 and change the
others (R,B Gain)
* When R or B gain is over 255, G gain can be adjust
below 172)
- Case : Medium / Warm Mode
To adjust the white balance without the saturation, Fix
the one of R/G/B gain to 192 (default data) and
decrease the others.
(3) Adj. condition: normal temperature
- Surrounding Temperature: 25±5 ºC
- Warm-up time: About 5 Min
- Surrounding Humidity: 20% ~ 80%
- Before White balance adjustment, Keep power on status,
don’t power off
5.1.1.2. 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 10cm 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.
5.1.2. Equipment
(1) Color Analyzer: CA-210 (NCG: CH 9 / WCG: CH12 / LED:
CH14)
(2) Adj. Computer(During auto adj., RS-232C protocol is
needed)
(3) Adjust Remocon
(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-1000

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Only for training and service purposes
5.1.3. Equipment connection
5.1.4. Adjustment Command (Protocol)
(1) RS-232C Command used during auto-adj
RS-232C COMMAND Explanation
CMD DATA ID
Wb 00 00 Begin White Balance adj.
Wb 00 ff End White Balance adj.
(internal pattern disappears )
(2) Adjustment Map
Adj. item
Command
(lower case ASCII)
Data Range
(Hex.) Default
(Decimal)
CMD1 CMD2 MIN MAX
Cool R Gain j g 00 C0 TBD
G Gain j h 00 C0 TBD
B Gain j i 00 C0 TBD
R Cut TBD
G Cut TBD
B Cut TBD
Medium R Gain j a 00 C0 TBD
G Gain j b 00 C0 TBD
B Gain j c 00 C0 TBD
R Cut TBD
G Cut TBD
B Cut TBD
Warm R Gain j d 00 C0 TBD
G Gain j e 00 C0 TBD
B Gain j f 00 C0 TBD
R Cut TBD
G Cut TBD
5.1.5. Adjustment method
5.1.5.1. Auto WB calibration
(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.
5.1.5.2. Manual adj. 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 10cm of the surface..
(3) Press ADJ key -> EZ adjust using adj. R/C -> 6. White-
Balance then press the cursor to the right (KEY►).
(When KEY(►) is pressed 204 Gray(80IRE) internal
pattern will be displayed)
(4) Adjust modes (Cool) : Fix the G gain at least 172 and
change the others (R/B Gain).
* If R or B gain is over 255, G gain can be adjust below 172
(5) Adjust two modes ( Medium / Warm) : Fix the one of R/G/B
gain to 192 (default data) and decrease the others
※CASE
First adjust the coordinate far away from the target value(x, y).
(1) x, y > target
(2) x, y < target
(3) x >target , y < target
(4) x < target , y > target
- Every 4 case have to fit y value by adjusting B Gain and then
fit x value by adjusting R-Gain
- In this case, increasing/decreasing of B Gain and R Gain can
be adjusted.
► How to adjust
(1) Fix G gain at least 172
Adjust R, B Gain (In Case of Mostly Blue Gain Saturation)
(2) When R or B Gain > 255, Release Fixed G Gain and
Readjust
※CASE Medium / Warm
First adjust the coordinate far away from the target value(x, y).
(1) x, y > target
i) Decrease the R, G.
(2) x, y < target
i) First decrease the B gain,
ii) Decrease the one of the others.
(3) x > target , y < target
i) First decrease B, so make y a little more than the target.
ii) Adjust x value by decreasing the R
(4) x < target , y > target
i) First decrease B, so make x a little more than the target.
ii) Adjust x value by decreasing the G
Color Analyzer
Computer
Pattern Generator
RS-232C
RS-232C
RS-232C
Probe
Signal Source
* If TV internal pattern is used, not needed

- 12 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
5.1.6. Reference
(White Balance Adj. coordinate and color
temperature)
▪ Luminance: 204 Gray, 80IRE
▪ Standard color coordinate and temperature using
CA-210(CH-14) – by aging time
Mode Coordinate Temp △uv
x y
Cool 0.271 0.270 13,000K 0.0000
Medium 0.286 0.289 9,300K 0.0000
Warm 0.313 0.329 6,500K 0.0000
▪ Standard color coordinate and temperature using CA-210
(1) LGD , 65”AUO and 50” AUO module
Mode Coordinate Temp △uv
x y
Cool 0.269±0.002 0.273±0.002 13,000K 0.0000
Medium 0.286±0.002 0.289±0.002 9,300K 0.0000
Warm 0.313±0.002 0.329±0.002 6,500K 0.0000
(2) O/S Module(AUO, CMI, Sharp,IPS…)
Mode Coordinate Temp △uv
x y
Cool 0.271±0.002 0.276±0.002 13,000K 0.0000
Medium 0.286±0.002 0.289±0.002 9,300K 0.0000
Warm 0.313±0.002 0.329±0.002 6,500K 0.0000
5.1.7. Reference
(White Balance Adj. coordinate and color
temperature)
▪ Luminance: 204 Gray, 80IRE
** (Normal Line) Model : (Chassis LA6EB/E/S)
▪ Aging chanber
▪ LGD, AUO, INX, Sharp, CSOT, BOE Module
(Cool temp Spec is 6500K)
5.2. Option selection per country
5.2.1. Overview
(1) Tool option selection is only done for models in Non-USA
North America due to rating
(2) Applied model: LA4AA Chassis applied to CANADA and
MEXICO
5.2.2. Country Group selection
(1) Press ADJ key on the Adj. R/C, and then select Country
Group Menu
(2) Depending on destination, select US, then on the lower
Country option, select US, CA, MX.
Selection is done using +, - KEY
5.2.3. Tool Option inspection
▪ Press Adj. key on the Adj. R/C, then select Tool option.
5.3. Ship-out mode check (In-stop)
- After final inspection, press In-Stop key of the Adj. R/C and
check that the unit goes to Stand-by mode.
NC
5.0
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 6-9 279 284 294 303 321 343
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
Cool Medium Warm
x y x y x y
spec 271 270 286 289 313 329
target 278 280 293 299 320 339
NC
5.0
Aging
time
(Min)
Cool Medium Warm
x y x y x y
271 270 285 293 313 329
1 0-2 280 285 294 308 319 340
2 3-5 276 280 290 303 315 335
3 6-9 272 275 286 298 311 330
4 10-19 269 272 283 295 308 327
5 20-35 267 268 281 291 306 323
6 36-49 266 265 280 288 305 320
7 50-79 265 263 279 286 304 318
8 80-119 264 261 278 284 303 316
9 Over 120 264 260 278 283 303 315

- 13 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
6. GND and HI-POT Test
6.1. GND & HI-POT auto-check preparation
(1) Check the POWER CABLE and SIGNAL CABE insertion
condition
6.2. GND & HI-POT auto-check
(1) Pallet moves in the station. (POWER CORD / AV CORD is
tightly inserted)
(2) Connect the AV JACK Tester.
(3) Controller (GWS103-4) on.
(4) GND Test (Auto)
- If Test is failed, Buzzer operates.
- If Test is passed, execute next process (Hi-pot test).
(Remove A/V CORD from A/V JACK BOX)
(5) HI-POT test (Auto)
- If Test is failed, Buzzer operates.
- If Test is passed, GOOD Lamp on and move to next
process automatically
6.3. Checkpoint
(1) Test voltage
- GND: 1.5KV/min at 100mA
- SIGNAL: 3KV/min at 100mA
(2) TEST time: 1 second
(3) TEST POINT
- GND Test = POWER CORD GND and SIGNAL CABLE
GND.
- Hi-pot Test = POWER CORD GND and LIVE & NEUTRAL.
(4) LEAKAGE CURRENT: At 0.5mArms
7. AUDIO output check
7.1. Audio input condition
(1) RF input: Mono, 1KHz sine wave signal, 100% Modulation
(2) CVBS, Component: 1KHz sine wave signal (0.4Vrms)
(3) RGB PC: 1KHz sine wave signal (0.7Vrms)
7.2. Specification
8. USB S/W Download
(optional, 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
than that of TV set, it didn’t work. Otherwise USB data is
automatically detected.
(3) Show the message “TV Software Update(Expert)”
(4) Updating is staring.
(5) Updating Completed, The TV will restart automatically
(6) If your TV is turned on, check your updated version and
Tool option.
* 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, TOOL OPTION setting is needed again.
(1) Push "IN-START" key in service remote controller.
(2) Select "Tool Option 1" and Push “OK” button.
(3) Punch in the number. (Each model has their number.)
No Item Min Typ Max Unit Remark
1 Audio practi-
cal max
Output, L/R
(Distor-
tion=10%
max Output)
9.0 10.0 12.0 W (1) Measurement
condition
- EQ/AVL/Clear
Voice: Off
(2) Speaker (6Ω
Impedance)
2 Audio practi-
cal max
Output, L/R
(Distor-
tion=10%
max Output)
2.7 3.0 3.6 W (1) Measurement
condition
- EQ/AVL/Clear
Voice: Off
(2) Speaker (6Ω
Impedance)
(3) 32LW300C ONLY



- 14 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
9. External Speaker Out
(1) Connect external speaker to speaker out port with phone
jack on TV side as below
(2) Check the Max. speaker output is 1W or not. Sine wave
with 1KHz will be displayed
(3) Check Both of the signal in speaker.
(Power only mode -> Fived 1W Default)
-> Check the input signal(1KHZ, Sine wave) and the wave
of output by utilizing oscilloscope
5HFRPPHQGHG,QSXW6LJQDO
5)N+]6LQHZDYH

- 15 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
TROUBLE SHOOTING GUIDE
1. Check the booting Voltage
Make sure the Stand-by Voltage
P401 4,5,6 pin , L403 : +8.8V_ST
Make sure the Normal voltage
4,5,6,7,8 pin :13.2V
Make sure the output
of SoC(IC101) LVDS
Make sure the CLK of X101
Is 24MHz
Make sure the Inverter control
and error
P401 11pin : High
Exchange the LCD Module
Make sure the Output Voltage
of power block
IC400 : +5V, IC400 : +1.1V,
IC404: +1.5V, Q406 : +3.3V
Make sure the Power
Connector
or Exchange the L403
Make sure the disconnection of
Main board 13.2V circuit
Exchange the
Circuit board
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No No
Make sure the PWR_ON of P401
1pin : 3.3V
Make sure the voltage
of LVDS Power
Q405 : 13.2V
Make sure the Power
Connector
or Exchange the L403
Exchange the X101
Re-download of Firmware
Exchange the
IC400,
IC404,
Q406
Exchange the Q405
Exchange the SoC(IC101)
Or Main board
Exchange the circuit or
check
The LCD module
Exchange the circuit board
No
Exchange the SoC(IC101)
Or Main board
No

- 16 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
2. Digital/Analog TV Video
Check the RF cable and RF signal
Check the Tuner 3.3V
; L3704: +3.3V
Check the Tuner Signal
: TU3703 3,4,5,6,7 pin
No
No
No
Yes
Yes
Yes
Check the LVDS output signal of
SoC(IC101)
Exchange the L3704
Exchange the Tuner
Exchange the SoC(IC101)
Or Main board

- 17 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
3. HDMI Video
Check the HDMI cable defect or
status of conductor
Check the EDID, I2C signal
HDMI1 : AR806
HDMI2 :AR805
Check the HDMI Jack
JK800, JK801
No
No
No
Yes
Yes
Yes
Check the HDMI_DET(HPD) signal
Exchange the IC or download
The EDID data
Exchange the HDMI Jack
Exchange the Resistor
R803,R808,R809,R814,Q800
Make sure the input signal type and
Our TV can support the signal
Yes
Check the voltage of
HDCP EEPROM /I2C
Signal : IC104
Check the HDMI signal
No
No
No
Yes
Yes
Yes
Check the LVDS signal output
Exchange the defective IC
Exchange the SoC(IC101)
Or Main board
Exchange the SoC(IC101)
Or Main board

- 18 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
4. RGB Video
No
No
No
Download the EDID data
Exchange the D-SUB Jack
Exchange the resistor R3308
No Exchange the SoC(IC101)
Or Main board
Check the RGB cable defect or
status of conductor
Check the EDID
Check the P3300 H /
V_Sync / R / G / B signal
Yes
Yes
Yes
Check the DSUB_DET signal
R3308
Make sure the input signal type and
Our TV can support the signal
Yes
Check the LVDS output signal of
SoC(IC101)
Yes

- 19 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
6. Component Video
5. AV Video
Make sure the input signal type and
Our TV can support the signal
Check the AV cable defect or
status of conductor
Make sure the JK1702,
AV_CVBS_IN R237
No
No
Yes
Yes
Yes
Make sure the CVBS_DET signal
R1713
Exchange the AV Jack
Or R237
Exchange the AV Jack
Or R1713
Make sure the LVDS output signal of
SoC(IC101)
No
Yes
Exchange the SoC(IC101)
Or Main board
Make sure the input signal type and
Our TV can support the signal
Check the Component cable defect
or status of conductor
Make sure the JK1702, Y/Pb/Pr
signal R235, R237, R239
No
No
Yes
Yes
Yes
Make sure the Component DET
signal R1712
Exchange the Component Jack
Or R235, R237, R239
Exchange the Component Jack
Or R1712
Make sure the LVDS output signal of
SoC(IC101)
No
Yes
Exchange the SoC(IC101)
Or Main board

- 20 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
7. Audio of All input
Check the speaker menu
(menu -> sound -> TV speaker)
No
No
Yes
Check the voltage of AMP IC(IC5600)
13.2V_AMP, 3.5V
Menu toggle
Exchange the AMP IC or
Main board
Check the AMP I2C Line
R140, R141
No
Yes
Check the I2C signal or
Exchange the SoC(IC101)
No
Yes
Check the SoC(IC101) I2S output
AR5601
Check the I2C signal or
Exchange the SoC(IC101)
Check the Audio output signal and coil
L5602, L5603, L5604, L5605
No
Yes
Exchange the Audio AMP
IC5600, or Coil.
No
Yes
Check the connector P5600 Exchange the connector If
the connector is defect
Check the Speaker resistor or connector
No
Yes
Exchange the speaker