LG 65UX340C Series User manual

Printed in KoreaP/NO : MFL69152118 (1506-REV00)
CHASSIS : LA5CP
MODEL : 65UX340C 65UX340C-UA
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 ............................................................... 9
TROUBLESHOOTING GUIDE................................................................ 14
BLOCK DIAGRAM.................................................................................. 23
EXPLODED VIEW .................................................................................. 24
SCHEMATIC CIRCUIT DIAGRAM ........................................... 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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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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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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SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement .
1. Application range
This spec sheet is applied LED TV with LA5CP 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
6. Aspect Ratio 16:9
7. Tuning System FS
8. Module Direct LC430EQE-FHM2 LGD 43UX340C-UA
LC490EQE-FHM2 LGD 49UX340C-UA
LC550EQE-FHM2 LGD 55UX340C-UA
LC650EQF-FHM2 LGD 65UX340C-UA
LC790EQF-FHM1 LGD 79UX340C-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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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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5.3. HDMI Input 1 (PC/DTV)
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed DDC
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
DTV
1 720*480 31.50 60.00 27.027 SDTV 480P
2 720*480 31.47 59.94 27.00 SDTV 480P
3 1280*720 45.00 60.00 74.25 HDTV 720P
4 1280*720 44.96 59.94 74.176 HDTV 720P
5 1920*1080 33.75 60.00 74.25 HDTV 1080I
6 1920*1080 33.72 59.94 74.176 HDTV 1080I
7 1920*1080 67.50 60.00 148.50 HDTV 1080P
8 1920*1080 67.43 59.94 148.352 HDTV 1080P
9 1920*1080 27.00 24.00 74.25 HDTV 1080P
10 1920*1080 26.97 23.97 74.176 HDTV 1080P
11 1920*1080 33.75 30.00 74.25 HDTV 1080P
12 1920*1080 33.71 29.97 74.176 HDTV 1080P

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ADJUSTMENT INSTRUCTION
1. Application
This spec. sheet applies to LA5CP 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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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 10Bit_FHD
RGB 87 FF FF
HDMI1 6E8D E68D E646
HDMI2 6E7D E67D E636
PCM
Ver 0.10
not Deep Color, PCM
2D
8Bit_HD 8Bit_FHD 10Bit_FHD
RGB 87 FF FF
HDMI1 6E08 E608 E6C1
HDMI2 6EF8 E6F8 E6B1
AC3
Ver 0.10
not Deep Color, AC3 + PCM
2D
8Bit_HD 8Bit_FHD 10Bit_FHD
RGB 87 FF
HDMI1 6E96 E696
HDMI2 6E86 E686
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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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
▪ Normal line (March ~ December)
▪ Standard color coordinate and temperature using
CA-210(CH-14) – by aging time
▪ LGD TN 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.
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
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 286 289 295 305 313 329
target 286 289 295 305 313 329

- 13 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
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 “Copying files from memory”
(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.)
9. Test factor for commercial model
9.1. RJP TEST (Only US model)
9.1.1. Overview
▪ Jig(Commercial Check JIG)
▪ RJ45 cable
▪ Power only mode
9.1.2. Test sequence
(1) Operate JIG(Commercial Check JIG) as shown on picture1
(2) Turn on TV and press “P-ONLY” key on adjustment
remocon.
(3) Connect RJ45 cable into RJP port of the TV set.
(4) Connect RJ45 cable into the JIG.
(5) If shown “OK” it’s normal, “NG” it’s defect.
(6) If defect, check the connection once again as done above.
(7) If the signal power is no good, check the connection of RF
cable.
10. 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
No Item Min Typ Max Unit Remark
1 Audio practi-
cal max
Output, L/R
(Distor-
tion=10%
max Output)
9.0
8.5
10.0
8.9
12.0
9.9
W
Vrms
(1) Measurement
condition
- EQ/AVL/Clear
Voice: Off
(2) Speaker (8Ω
Impedance)
(3) 32/37/42/47/55/60
INCH
2 Audio practi-
cal max
Output, L/R
(Distor-
tion=10%
max Output)
9.0
8.5
10.0
8.9
12.0
9.9
W
Vrms
(1) Measurement
condition
- EQ/AVL/Clear
Voice: Off
(2) Speaker (8Ω
Impedance)
(3) 26 INCH
RJP port
5HFRPPHQGHG,QSXW6LJQDO
5)N+]6LQHZDYH

- 14 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
TROUBLE SHOOTING
1. No video (Main IC Block)
Check Audio (Speaker out)
Check stand-by voltage 3.5V
P401/P402 5,7,8 pin
Check stand-by voltage 3.5V
L400,L401,ZD400,C400,C407
Replace
L400,L401,ZD400,C400,C407
Check Power connector
(24pin/28pin)
Short check
stand-by voltage 3.5V
Replace
Power board.
Check X-TAL X101 Replace X101
Check POWER ON signal
P401/P402 1 pin Download software (Main) Replace IC101
or Main Board
Check multi voltage 12V, 24V
P401/P402 11,12,13,14,15p : 12V
P401/P402 18,19,20,21p : 24V
Check Power connector
(24pin/28pin)
Short check
multi voltage 12V, 24V
Replace
Power board.
Check Main IC power block
IC404 : 1.5V , Q406 : 3.3V
IC403 : 1.1V
Replace IC404, Q406, IC403
Next page (Back-end block)
Audio
OK
NG NG NG
NG
NG NG
NG
NG
NG
Low
Audio NG
OK
OK
OK
OK
High

- 15 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
2. No video (Back-end Block)
Check Audio (Speaker out)
Check X-TAL X1351
Check URSA11 IC power block
IC13403 : 1.5V , IC13401 : 3.3V
IC13402 : 1.15V
Replace IC13403, IC13401,
IC13402
Replace X1351
Vx1 power voltage Q405 : 12V Replace Q405
Vx1 output signal Download software (URSA11) Replace IC119
or Main Board
Check DRV ON signal
P401/P402 2 pin Replace Main Board Check Power Board
Check Vx1 cable
Check Power Board
Replace Vx1 cable
Previous page (Main IC block)
Audio
NG
NG
NG
NG
Low NG
NG NG
NG
Audio OK
OK
OK
OK
High
OK
OK

- 16 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
3. Digital / Analog TV Video No signal
Check RF cable & signal
Check Tuner power
L3704 : 3.3V
Check Tuner I2C
R3716, R3717, R3738, R3739
Replace R3716, R3717,
R3738, R3739
Replace Tuner
or IC101
or Main Board
Replace L3704
Check SIF,CVBS signal
Q3700, Q3701 pin
Check SIF, CVBS signal
Pin 8,9 Replace Tuner
Replace IC101 or Main Board
NG
NG NG
NG NG
OK
OK
OK
OK
4. AV Video No signal
Check input signal format.
Is it supported?
Check AV cable
Check AV Jack Detect Signal
R2814 Replace AV Jack JK2802
Check CVBS signal
ZD2802, ZD2803,
R2859, R246, R241
Replace ZD2802, ZD2803,
R2859, R246, R241
Replace IC101 or Main Board
NG
NG
OK
OK
OK
OK

- 17 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
5. Component Video No signal
Check input signal format.
Is it supported?
Check Component cable
Check AV Jack CVBS signal
ZD2802, ZD2804, ZD2806 Replace AV Jack JK2802
Replace ZD2804, ZD2805,
R2800, R239
Check Component signal Y
ZD2802, ZD2803,
R2859, R241
Replace ZD2802, ZD2803,
R2859, R241
Replace ZD2806, ZD2807,
R2801, R243
Check Component signal Pb
ZD2804, ZD2805,
R2800, R239
Check Component signal Pr
ZD2806, ZD2807,
R2801, R243
Replace IC101 or Main Board
NG
NG
NG
NG
OK
OK
OK
OK
OK
OK

- 18 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
6. HDMI Video/Audio No signal (HDMI Block)
Check input signal format.
Is it supported?
Check HDMI cable
Check DDC in-start menu
Check DDC component
HDMI1 : AR1391,
AR1393, D1395
HDMI2 : AR1392,
AR1394, D1396
Replace DDC component
HDMI1 : AR1391,
AR1393, D1395
HDMI2 : AR1392,
AR1394, D1396
Replace Main
Board
Or HDMI Jack
HDMI1 : JK1391
HDMI2 : JK1392
Check TMDS signal
HDMI1 : JK1391
HDMI2 : JK1392
1,3,4,6,7,9,10,12 pin
Replace HDMI Jack
HDMI1 : JK1391
HDMI2 : JK1392
Next page
(URSA11, M1A Block)
Replace Main Board
NG NG
NG
NG
NG
OK
OK
OK
OK
7. HDMI Video No signal (URSA11, M1A Block)
Check HPD
HDMI1 : JK1391 19 pin
HDMI2 : JK1392 19 pin
Check URSA11 I2C
R13574, R13583, AR1351
Check HDMI pattern
Replace HPD component
HDMI1 : R1391, Q1391
R1393, R1395, R1399
HDMI2 : R1392, Q1392
R1394, R1396, R1401
Replace IC101
or Main Board
or HDMI Jack
HDMI1 : JK1391
HDMI2 : JK1392
Replace Main Board
Replace URSA11 IC (IC119)
or Main IC (IC101)
or Main Board
Replace URSA11 I2C component
R13574, R13583, AR1351
Replace URSA11 IC (IC119)
or Main IC (IC101)
or Main Board
NG NG
NG
NG NG
OK
OK
OK

- 19 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
8. USB No storage
Check USB device
Check USB 5V DCDC IC
IC405 output voltage : 5V
Check USB 5V OCP IC
IC406 output voltage : 5V
Replace USB 5V DCDC IC
IC405
Replace R700, R701 Replace USB Jack (JK700)
or Main IC (IC101)
Check USB signal
R700, R701
Replace USB 5V OCP IC
IC406
Replace Main IC (IC101)
or Main Board
Check Component signal Pr
ZD2806, ZD2807,
R2801, R243
Replace IC101 or Main Board
NG
NG NG
NG
OK
OK
OK
OK
OK
OK

- 20 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
9. All source Audio
Check the TV Speaker Menu
(Menu →Audio →Sound Out)
: TV Speaker
Check AMP IC (IC5600) Power
L5600 : 24V
L5601 : 3.3V
Check AMP I2C
R140, R141, R5604, R5605
C5607, C5608
Replace AMP I2C component
R140, R141, R5604, R5605
C5607, C5608
Replace
AMP power component
L5600 : 24V
L5601 : 3.3V
Check I2S signal
IC5600 7, 8, 38 pin
Replace Main IC (IC101)
or Main Board
Check amp output signal
P5600 1, 2, 3, 4 pin
Replace
amp output component
L5602, L5603, L5604, L5605
C5622, C5623, C5627, C5628
Check Power connector
(24pin/28pin)
Replace
Power board.
Check speaker connector Replace speaker connector
Replace AMP IC (IC5600)
or Main IC (IC101)
or Main Board
Replace amp out wafer
P5600
Replace
AMP IC (IC5600)
or Main Board
Check speaker Replace speaker
Select “TV Speaker”
NG
NG
NG
NG
NG
NG
NG NG
NG
NG NG
NG
OK
OK
OK
OK
OK
OK