LG 65UX340C Series User manual

Printed in KoreaP/NO : MFL69270703 (1507-REV00)
CHASSIS : LB5CP
MODEL : 65UX340C 65UX340C-TA
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................................................................ 17
BLOCK DIAGRAM ................................................................................. 24
EXPLODED VIEW .................................................................................. 25
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 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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Only for training and service purposes
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement .
1. Application range
This specification is applied to the LED TV used LB5CP
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. Model General Specification
No. Item Specication Remarks
1 Market Asia, Oceania, Africa, Middle East
(PAL/DVB Market) only Analog for India, Thailand
2 Broadcasting system
(1) PAL/SECAM-B/G/D/K
(2) PAL-I
(3) NTSC-M
(4) DVB-T/T2
PAL
3 Channel Storage ATV – 135EA, DTV – 1000EA
4 Receiving system Analog : Upper Heterodyne
Digital : COFDM(DVB-T)
► DVB-T/T2
- 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(Composite) Input PAL, SECAM, NTSC 4 System : PAL, SECAM, NTSC, PAL60
6 RGB Input (1EA) RGB-PC Analog(D-SUB 15PIN)
7 Component Input(1EA) Y/Cb/Cr, Y/Pb/Pr
8 HDMI Input HDMI1-DTV/DVI
HDMI2-DTV/DVI Common Port in AV & PC input.
9 Audio Input RGB/DVI Audio
AV
10 SDPIF Out (1EA) SPDIF Out
11 USB (2EA) For My Media(Movie/Photo/Music List)
and SVC
12 External Speaker Max 1W @ 8 ohm Stereo SE output
13 RTC(Real Time Clock) ± 3Sec/24Hrs

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Only for training and service purposes
5. External Input Support Format
5.1. Component Input (Y, PB,PR)
No. Resolution H-freq(kHz) V-freq(Hz) Pixel clock(MHz) Proposed
1 720*576 15.625 50.00 13.5 SDTV, DVD 576I
2 720*480 15.73 60.00 13.5135 SDTV, DVD 480I
3 720*480 15.73 59.94 13.50 SDTV, DVD 480I
4 720*576 31.25 50.00 27.00 SDTV 576P
5 720*480 31.50 60.00 27.027 SDTV 480P
6 720*480 31.47 59.94 27.00 SDTV 480P
7 1280*720 37.50 50.00 74.25 HDTV 720P
8 1280*720 45.00 60.00 74.25 HDTV 720P
9 1280*720 44.96 59.94 74.176 HDTV 720P
10 1920*1080 28.125 50.00 74.25 HDTV 1080I
11 1920*1080 33.75 60.00 74.25 HDTV 1080I
12 1920*1080 33.72 59.94 74.176 HDTV 1080I
13 1920*1080 56.25 50.00 148.50 HDTV 1080P
14 1920*1080 67.50 60.00 148.50 HDTV 1080P
15 1920*1080 67.432 59.94 148.352 HDTV 1080P
16 1920*1080 27.00 24.00 74.25 HDTV 1080P
17 1920*1080 26.97 23.94 74.176 HDTV 1080P
18 1920*1080 33.75 30.00 74.25 HDTV 1080P
19 1920*1080 33.71 29.97 74.176 HDTV 1080P
No. Resolution H-freq(kHz) V-freq(Hz) Pixel clock(MHz) Proposed Remarks
1 640*350 @70Hz 31.468 70.09 25.17 EGA
2 720*400 @70Hz 31.469 70.08 28.321 DOS
3 640*480 @60Hz 31.469 59.940 25.175 VESA(VGA)
4 800*600 @60Hz 37.879 60.31 40.000 VESA(SVGA)
5 1024*768 @60Hz 48.363 60.00 65.000 VESA(XGA)
6 1152*864 @60Hz 54.348 60.053 80.002 VESA
7 1360*768 @60Hz 47.712 60.015 85.5 VESA(WXGA)
8 1280*1024 @60Hz 63.981 60.020 108 VESA(SXGA) FHD only
9 1920*1080 @60Hz 67.5 60.0 148.5 WUXGA (Reduced blanking) FHD only
5.2. RGB Input(PC)

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Only for training and service purposes
5.2. HDMI Input(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 80.00 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 Except HD Model
9 1920*1080 67.50 60.00 148.5 HDTV 1080P O Except HD Model
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 24 297 UDTV 2160P O Only UHD Model
DTV
1 640*480 31.46 59.94 25.125 SDTV 480P
2 640*480 31.50 60.00 25.125 SDTV 480P
3 720*480 15.73 59.94 13.500 SDTV 480I
Don’t insert in manual
spec. out
4 720*480 15.75 60.00 13.514 SDTV 480I
5 720*576 15.62 50.00 13.500 SDTV 576I(DVB)
6 720*480 31.47 59.94 27.00 SDTV 480P
7 720*480 31.50 60.00 27.027 SDTV 480P
8 720*576 31.25 50.00 27.00 SDTV 576P(DVB)
9 1280*720 37.50 50.00 74.25 HDTV 720P(DVB)
10 1280*720 45.00 60.00 74.25 HDTV 720P
11 1280*720 44.96 59.94 74.176 HDTV 720P
12 1920*1080 28.12 50.00 74.25 HDTV 1080I(DVB)
13 1920*1080 33.75 60.00 74.25 HDTV 1080I
14 1920*1080 33.72 59.94 74.176 HDTV 1080I
15 1920*1080 56.25 50.00 148.50 HDTV 1080P(DVB)
16 1920*1080 67.50 60.00 148.50 HDTV 1080P
17 1920*1080 67.43 59.94 148.35 HDTV 1080P
18 1920*1080 27.00 24.00 74.25 HDTV 1080P
19 1920*1080 26.97 23.97 74.175 HDTV 1080P
20 1920*1080 33.75 30.00 74.25 HDTV 1080P
21 1920*1080 33.71 29.97 74.175 HDTV 1080P
22 3840*2160 53.95 23.98 297.00 UDTV 2160P UHD only
23 3840*2160 54.00 24.00 297.00 UDTV 2160P UHD only
24 3840*2160 56.25 25.00 297.00 UDTV 2160P UHD only
25 3840*2160 61.43 29.97 297.00 UDTV 2160P UHD only
26 3840*2160 67.50 30.00 297.00 UDTV 2160P UHD only
27 3840*2160 112.50 50.00 594.00 UDTV 2160P UHD only
28 3840*2160 135.00 59.94 593.41 UDTV 2160P UHD only
29 3840*2160 135.00 60.00 594.00 UDTV 2160P UHD only
30 4096*2160 53.95 23.98 297.00 UDTV 2160P UHD only
31 4096*2160 54.00 24.00 297.00 UDTV 2160P UHD only
32 4096*2160 56.25 25.00 297.00 UDTV 2160P UHD only
33 4096*2160 61.43 29.97 297.00 UDTV 2160P UHD only
34 4096*2160 67.50 30.00 297.00 UDTV 2160P UHD only
35 4096*2160 112.50 50.00 594.00 UDTV 2160P UHD only
36 4096*2160 135.00 59.94 593.41 UDTV 2160P UHD only
37 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 Range
This specification sheet is applied to all of the LED TV with
LB5CP chassis.
2. Designation
(1) The adjustment is according to the order which is designated
and which must be followed, according to the plan which
can be changed only on agreeing.
(2) Power adjustment : Free Voltage.
(3) Magnetic Field Condition: Nil.
(4) Input signal Unit: Product Specification Standard.
(5) Reserve after operation : Above 5 Minutes (Heat Run)
Temperature : at 25 °C ± 5 °C
Relative humidity : 65 ± 10 %
Input voltage : 100-220 V, 50/60 Hz
( 6) Adjustment equipments: Color Analyzer(CA-210 or
CA-110), DDC Adjustment Jig, Service remote control.
(7) Push the "IN STOP" key - For memory initialization.
3. Main PCB check process
▪ APC - After Manual-Insert, executing APC
* Boot file Download
(1) Execute ISP program "Mstar ISP Utility" and then click
"Config" tab.
(2) Set as below, and then click "Auto Detect" and check "OK"
message.
If "Error" is displayed, check connection between computer,
jig, and set.
(3) Click "Read" tab, and then load download file(XXXX.bin)
by clicking "Read".
(4) Click "Connect" tab. If "Can't" is displayed, check connection
between computer, jig, and set.
(5) Click "Auto" tab and set as below.
(6) Click "Run".
(7) After downloading, check "OK" message.
* USB DOWNLOAD
(1) Put the USB Stick to the USB socket.
(2) Automatically detecting update file in USB Stick.
- If version of update file in USB Stick is older, it will not
work. But version of update file is newer, USB data will be
detected automatically.
(3) Show the message “Copying files from memory”
(1)
filexxx.bin
(4)
(5)
(6)
(7)...........OK
filexxx.bin
(2)
(3)
Please Check the Speed :
To use speed between
from 200KHz to 400KHz
Case1 : Software version up
1. After downloading S/W by USB , TV set will reboot
automatically.
2. Push “In-stop” key.
3. Push “Power on” key.
4. Function inspection
5. After function inspection, Push “In-stop” key.
Case2 : Function check at the assembly line
1. When TV set is entering on the assembly line, Push
“In-stop” key at rst.
2. Push “Power on” key for turning it on.
→ If you push “Power on” key, TV set will recover
channel information by itself.
3. After function inspection, Push “In-stop” key.

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Only for training and service purposes
(4) Updating is starting.
(5) Updating Completed, The TV will restart automatically.
(6) If your TV is turned on, check your updated version and
Tool option. (explain the Tool option, next stage)
* If downloading version is more new than your TV have, TV
can lost all channel data. In this case, you have to channel
recover. if all channel data is cleared, you didn’t have a DTV/
ATV test on production line.
(7) When changing Tool OPT by using USB Port, in condition
of 2 port usb in TV, we surport only USB1.
* 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) Push in the number. (Each of models has their number)
(4) Completed selecting Tool option.
* RS-232C Connection Method.
Connection : PCBA (USB Port) → USB to Serial Adapter
(UC-232A) → RS-232C cable → PC(RS-232C port)
■ Product name of USB to Serial Adapter is UC-232A.
* HDCP2.0 key D/L
(1) Equipment & Condition
1) Play file: keydownload.exe
(2) Communication Port connection
1) Key Write: Com 1,2,3,4 and 115200 (Baudrate)
2) Barcode: Com 1,2,3,4 and 9600 (Baudrate)
(3) Download process
1) Select the download items.
2) Mode check: Online Only
3) Check the test process : DETECT → MAC → Widevine
4) Play: START
5) Check of result: Ready, Test, OK or NG
(4) Communication Port connection
1) Connect: PCBA Jig RS-232C Port == PC RS-232C Port
(5) Download
#### Cacution: You need to Access USB certification to
key download####
1) Models (HDCP2.2)
3.1. ADC Process
(Optional : If ADC processes as OTP, There is no need to
proceed internal ADC.)
(1) ADC
- Enter Service Mode by pushing "ADJ" key,
- Enter Internal ADC mode by pushing "►" key at "9. ADC
Calibration".
<Caution> Using "P-ONLY" key of the Adjustment remote
control, power on TV.
If there is no Component Input, disappear “ADC Comp” message.
* ADC Calibration Protocol (RS232)
Adjust Sequence
▪ aa 00 00 [Enter Adjust Mode]
▪ xb 00 40 [Component1 Input (480i)]
▪ ad 00 10 [Adjust 480i Comp1]
▪ xb 00 60 [RGB Input (1024*768)]
▪ ad 00 10 [Adjust 1024*768 RGB]
▪ aa 00 90 End Adjust mode
* Required equipment : Adjustment remote control.
EZ ADJUST
0. Tool Option1
1. Tool Option2
2. Tool Option3
3. Tool Option4
4. Tool Option5
5. Tool Option6
6. Commercial Tool Option
7. Country Group
8. Area Option
9.ADC Calibration ►
10. White Balance
11. 10 Point WB
12. Test Pattern
13. EDID D/L
14. Sub B/C
15. Ext. Input Adjust
16. SPK Lipsync Adjust
17. SPDIF Lipsync Adjust
ADC Calibration
ADC Comp 480i
ADC Comp 1080p
ADC RGB
ADC Type
NG
NG
NG
OTP
Start Reset

- 11 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
3.2. EDID Download
(1) After enter Service Mode by pushing “ADJ” key.
(2) Enter EDID D/L mode.
(3) Enter “START” by pushing “OK” key.
* Caution : Never connect HDMI cable when EDID downloaded.
3.3. EDID data
1) UHD HDMI1 EDID data(2D, DTS, 6G)
2) UHD HDMI2 EDID data(2D, DTS, 3G)
● Detail EDID Options are below
a. Product ID
b. Serial No: Controlled on production line.
c. Month, Year:
ex) Week : '01' -> '01'
Year : '2015' -> '19' fix
d. Model Name(Hex):
cf) TV set’s model name in EDID data is below.
e. Checksum UHD model: Changeable by total EDID data.
1) DTS
If HDMI UHD Deep Colour is “On” each HDMI port in
Picture Menu, HDMI1 and HDMI2 have 6G checksum.
f. Vendor Specific
* Local Dimming Function Check (only UX34 series)
Step1) Turn on TV.
Step2) Press “P-only” key, enter to power only mode and
escape the “P-only” Mode by pressing “Exit” key
Step3) Press “Tilt” key, entrance to Local Dimming mode.
Step4) At the Local Dimming mode full black ground, set the
local dimming Off/High.
Step5) Yon can see the A when the local dimming Off, you
can see the B when the local dimming High.
Step6) After confirm, Press “Exit” key.
* Function Check
(1) Check display and sound
■ Check Input and Signal items. (cf. work instructions)
1) TV
2) AV (SCART/ CVBS)
3) COMPONENT (480i)
4) HDMI
5) PC Audio In
* Display and Sound check is executed by Remote control.
* Caution : Not to push the INSTOP KEY after completion if the
function inspection.
EZ ADJUST
0. Tool Option1
1. Tool Option2
2. Tool Option3
3. Tool Option4
4. Tool Option5
5. Tool Option6
6. Country Group
7. Area Option
8. ADC Calibration
9. White Balance
10. 10 Point WB
11. Test Pattern
12. EDID D/L ►
13. Sub B/C
14. Ext. Input Adjust
EDID D/L
HDMI1 NG
HDMI2 NG
Start Reset
0123456789ABCDEF
00 00 FF FF FF FF FF FF 00 1E 6D a b
01 c 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26
02 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 81 80
03 01 01 01 01 01 01 08 E8 00 30 F2 70 5A 80 B0 58
04 8A 00 40 84 63 00 00 1E 02 3A 80 18 71 38 2D 40
05 58 2C 45 00 40 84 63 00 00 1E 00 00 00 FD 00 3A
06 3E 1E 88 3C 00 0A 20 20 20 20 20 20 d
07 d 01 e
08 02 03 47 F1 58 10 9F 04 13 05 14 03 02 12 20 21
09 22 15 01 60 61 5D 5E 5F 65 66 62 63 64 29 3D 06
0A C0 15 07 50 f
0B f 02 03 04 67 D8 5D C4 01 78 88 03 E3 05
0C C0 00 E4 0F 00 C0 18 66 21 50 B0 51 00 1B 30 40
0D 70 36 00 40 84 63 00 00 1E 01 1D 00 72 51 D0 1E
0E 20 6E 28 55 00 40 84 63 00 00 1E 00 00 00 00 00
0F 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 e
0123456789ABCDEF
00 00 FF FF FF FF FF FF 00 1E 6D a b
01 c 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26
02 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 81 80
03 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
04 45 00 40 84 63 00 00 1E 66 21 50 B0 51 00 1B 30
05 40 70 36 00 40 84 63 00 00 1E 00 00 00 FD 00 3A
06 3E 1E 53 10 00 0A 20 20 20 20 20 20 d
07 d 01 e
08 02 03 3C F1 54 10 9F 04 13 05 14 03 02 12 20 21
09 22 15 01 5D 5E 5F 62 63 64 29 3D 06 C0 15 07 50
0A C0 02
0B 03 04 E3 05 C0 00 E5 0E 60 61 65 66 01 1D 80 18
0C 71 1C 16 20 58 2C 25 00 40 84 63 00 00 9E 01 1D
0D 00 72 51 D0 1E 20 6E 28 55 00 40 84 63 00 00 1E
0E 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0F 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 e
MODEL NAME HEX EDID Table DDC Function
HD/FHD Model 0001 01 00 Analog/Digital
MODEL NAME(HEX)
LG TV 00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 (LG TV)
EDID C/S data UHD
HDMI 1 HDMI 2
Check
sum
(Hex)
UDH Deep
color “on” 6G
Block 0
Block 1
A0 (HDMI1, 6G) A0 (HDMI2, 6G)
C7 (HDMI1, 6G) B7 (HDMI2, 6G)
UDH Deep
color “off” 3G
Block 0
Block 1
E6 (HDMI1, 3G) E6 (HDMI2, 3G)
71 (HDMI1, 3G) 61 (HDMI2, 3G)
INPUT Model name(HEX)
HDMI1 67 03 0C 00 10 00 80 1E
HDMI2 67 03 0C 00 20 00 80 1E

- 12 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
4. Total Assembly line process
4.1. Adjustment Preparation
▪ W/B Equipment condition
ca210 : LED → CH14, Test signal: Inner pattern(80IRE)
▪ Above 5 minutes H/run in the inner pattern. (“power on” key
of adjust remote control)
▪ If it is executed W/B adjustment in 2~3 minutes H/run, it is
adjusted by Target data
▪ Normal line (LGD/CMI, March ~ December for Gumi, Global)
▪ Normal line (LGD/CMI, January ~ February for Gumi, Apply
not Cinema Screen)
▪ Aging chamber (LGD/CMI)
▪ Use only AUO/Sharp/CSOT (Cool temp Spec is 13000K)
▪ W/B information
* Connecting picture of the measuring instrument
(On Automatic control)
Inside PATTERN is used when W/B is controlled. Connect to
auto controller or push Adjustment R/C P-ONLY → Enter the
mode of White-Balance, the pattern will come out.
* Auto-control interface and directions
(1) Adjust in the place where the influx of light like floodlight
around is blocked. (illumination is less than 10 lux).
(2) Adhere closely the Color analyzer(CA210) to the module
less than 10 cm distance, keep it with the surface of the
Module and Color analyzer's prove vertically.(80° ~ 100°).
(3) Aging time
- After aging start, keep the power on (no suspension of
power supply) and heat-run over 5 minutes.
- Using 'no signal' or 'POWER ONLY' or the others, check
the back light on.
▪ Auto adjustment Map(RS-232C)
RS-232C COMMAND
[CMD ID DATA]
Wb 00 00 White Balance Start
Wb 00 ff White Balance End
<Caution>
Color Temperature : COOL, Medium, Warm.
One of R Gain/G Gain/ B Gain should be kept on 0xC0, and
adjust other two lower than C0.(When R/G/B Gain are all
C0, it is the FULL Dynamic Range of Module)
Mode Temp Coordinate spec
Cool
(50) 13,000 K X=0.271 (± 0.002) Y=0.270 (± 0.002)
* Test signal
- Inner pattern for W/B
adjust
- External white pattern
(80IRE, 204gray)
Medium
(0) 9,300 K X=0.286 (± 0.002) Y=0.289 (± 0.002)
Warm
(W50) 6,500 K X=0.313 (± 0.002) Y=0.329 (± 0.002)
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
Aging
time
(Min)
Cool Medium Warm
x y x y x y
271 270 286 289 313 329
1 0-2 286 295 301 314 328 354
2 3-5 284 290 299 309 326 349
3 6-9 282 287 297 306 324 346
4 10-19 279 283 294 302 321 342
5 20-35 276 278 291 297 318 337
6 36-49 274 275 289 294 316 334
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
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
Cool Medium Warm
x y x y x y
spec 271 270 286 289 313 329
target 278 280 293 299 320 339
Model information W/B information
Model Module Panel Backlight Type Using W/B table
LB5CG/H/F All All Direct LED O
Full White Pattern CA-210
COLOR
ANALYZER
TYPE : CA-210
RS-232C Communication
RS-232C COMMAND
[CMD ID DATA] MIN
CENTER
(DEFAULT) MAX
Cool Mid Warm Cool Mid Warm
R Gain jg Ja jd 00 172 192 192 192
G Gain jh Jb je 00 172 192 192 192
B Gain ji Jc jf 00 192 192 172 192
R Cut 64 64 64 128
G Cut 64 64 64 128
B Cut 64 64 64 128

- 13 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
* Manual W/B process using Adjust Remote control.
▪ Color analyzer(CA100+, CA210) should be used in the
calibrated ch by CS-1000.
▪ Operate the zero-calibration of the CA100+ or CA-210,
then stick sensor to the module when adjusting.
▪ After enter Service Mode by pushing "ADJ" key,
▪ Enter White Balance by pushing "►" key at "10. White
Balance".
▪ For manual adjustment, it is also possible by the following
sequence.
(1) Set TV in Adj. mode using “P-ONLY” key on remote
control and then operate heat run longer than 15
minutes. (If not executed this step, the condition for
W/B may be different.)
(2) Push “Exit” key.
(3) Enter White Balance mode by pushing the ADJ key and
select “10. White Balance”.
When KEY (►) is pressed, 206 Gray internal pattern will
be displayed.
(4) Zero Calibrate the probe of Color Analyzer, then place it
on the center of LCD module within 10 cm of the surface.
(5) Select each items (Red/Green/Blue Gain) using
▲/▼(CH ▲/▼) key on R/C..
(6) Adjust R/ G/ B Gain using ▲/▼(VOL +/-) key on R/C.
(7) Adjust three modes all (Cool / Medium / Warm)
-. For All model w/o LS345
Fix the one of R/G/B gain and change the others
-. For G-FIX model
Cool Mode
1) Fix the one of R/G/B gain to 192 (default data) and
decrease the others.
(If G gain is adjusted over 172 and R and B gain less
than 192 , Adjust is O.K.)
2) If G gain is less than 172, Increase G gain by up to
172, and then increase R gain and G gain same
amount of increasing G gain.
3) If R gain or B gain is over 255, readjust G gain less
than 172, Conform to R gain is 255 or B gain is 255
Medium / Warm Mode - Fix the one of R/G/B gain to
192 (default data) and decrease the others.
(8) When adjustment is completed, exit adjustment mode
using EXIT key on R/C.
* CASE Cool Mode
First adjust the coordinate far away from the target value(x,
y).B
(1) x, y > target
1) Decrease the R, G.
(2) x, y < target
1) First decrease the B gain,
2) Decrease the one of the others.
(3) x > target , y < target
1) First decrease B, so make y a little more than the target.
2) Adjust x value by decreasing the R
(4) x < target , y >target
1) First decrease B, so make x a little more than the target.
2) Adjust x value by decreasing the G
* After you finished all adjustments, Press "In-start" key and
compare Tool option and Area option value with its BOM, if it
is correctly same then unplug the AC cable. If it is not same,
then correct it same with BOM and unplug AC cable.
For correct it to the model's module from factory Jig model.
* Push the "IN STOP" key after completing the function
inspection. And Mechanical Power Switch must be set “ON”.
4.2. Outgoing condition Configuration
■ When pressing IN-STOP key by SVC remocon, Red LED
are blinked alternatively. And then automatically turn off.
(Must not AC power OFF during blinking)
EZ ADJUST
0. Tool Option1
1. Tool Option2
2. Tool Option3
3. Tool Option4
4. Tool Option5
5. Tool Option6
6. Commercial Tool Option
7. Country Group
8. Area Option
9. ADC Calibration
10. White Balance ►
11. 10 Point WB
12. Test Pattern
13. EDID D/L
14. Sub B/C
15. Ext. Input Adjust
16. SPK Lipsync Adjust
17. SPDIF Lipsync Adjust
Whit Balance
Color Temp. ◄►
R-Gain
G-Gain
B-Gain
R-Cut
G-Cut
B-Cut
Test-Pattern
Backlight
Reset To Set
Cool
172
192
192
64
64
64
ON
100

- 14 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
5. HI-POT Test
5.1. HI-POT auto-check preparation
(1) Check the POWER CABLE and SIGNAL CABE insertion
condition.
5.2. 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) HI-POT test (Auto)
- If Test is failed, Buzzer operates.
- If Test is passed, GOOD Lamp on and move to next
process automatically.
5.5.3. Checkpoint
(1) Test voltage
- Touchable Metal : 3 KV / min at 100 mA
- SIGNAL: 3 KV/min at 100 mA
(2) TEST time: 1 second (case : mass production )
(3) TEST POINT
- Touchable Metal => LIVE & NEUTRAL : Touchable Metal.
- SIGNAL => LIVE & NEUTRAL : SIGNAL.
6. Model name & Serial number D/L
▪ Press "Power on" key of service remote control.
(Baud rate : 115200 bps)
▪ Connect RS232 Signal Cable to RS-232 Jack.
▪ Write Serial number by use RS-232.
▪ Must check the serial number at the Product/Service Info.(menu
key → red key → select Product/Service info)
6.1. Signal Table
CMD : A0h
LENGTH : 85~94h (1~16 bytes)
ADH : EEPROM Sub Address high (00~1F)
ADL : EEPROM Sub Address low (00~FF)
Data : Write data
CS : CMD + LENGTH + ADH + ADL + Data_1 +...+ Data_n
Delay : 20ms
6.2. Comand Set
* Description
FOS Default write : <7mode data> write
Vtotal, V_Frequency, Sync_Polarity, Htotal, Hstart, Vstart, 0,
Phase
Data write : Model Name and Serial Number write in EEPROM,.
6.3. 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)
There 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 "6.Model Number D/L" like below photo.
(3) Input the Factory model name or Serial number like photo.
(4) Check the model name Instart menu. → Factory name
displayed.
( 5) Check the Diagnostics.(DTV country only) → Buyer model
displayed.
CMD LENGTH ADH ADL DATA_1 . . . Data_n CS DELAY
Adjust mode CMD(hex) LENGTH(hex) Description
EEPROM WRITE A0h 84h+n n-bytes Write (n = 1~16)

- 15 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
7. MAC Address & CI+ key download
(xxLX54*S-TA Model →MAC Only)
7.1 MAC Address
7.1.1 Equipment & Condition
▪ Play file : Serial.exe
▪ MAC Address edit
▪ Input Start / End MAC address
7.1.2. Download method
(1) Communication Prot connection
Connection: PCBA(USB Port) → USB to Serial Adapter(UC-
232A) → RS-232C cable → PC(RS-232C port)
* Caution: LJ21* chassis support only UC-232A driver. (only
use this one.)
(2) MAC Address & CI+ Key Download
▪ Set CI+ Key path Directory at Start Mac & CI+ Download
Programme
▪ Com 1,2,3,4 and 115200(Baudrate)
▪ Port connection button click(1)
▪ Push the (2) MAC Address write.
▪ At success Download, check the OK (3)
▪ Start CI+ Key Download, Push the (4)
▪ Check the OK or NG
7.2. LAN Inspection
7.2.1. Equipment & Condition
▪ Each other connection to LAN Port of IP Hub and Jig
7.2.2. LAN inspection solution
▪ LAN Port connection with PCB
▪ Network setting at MENU Mode of TV
▪ Setting automatic IP
▪ Setting state confirmation
- If automatic setting is finished, you confirm IP and MAC
Address.
7.3. LAN PORT INSPECTION(PING TEST)
Connect SET -> LAN port == PC -> LAN Port
7.3.1. 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
7.3.2. 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.
GP4_LOW
SET PC

- 16 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
8. Check Commercial features
concerning Output.
8.1. External SPK Out and Volume control
(1) Connect external speaker to speaker out port with phone
jack on TV side as below.
(2) Check the Max. speaker output is 1 W or not. Sine wave
with 1 KHz will be displayed.
8.2. IR Out
* In using Commercial Check Jig
(1) Check the LED for IR-Out inspection.
- Please refer to the criteria of Judgement.
* In using Mini check Jig
(1) Connect JIG for inspection to RS-232C port on TV as
below.
(2) Check the LED for IR-Out inspection.
- Please refer to the criteria of Judgement.
Model Info Commercial Feature
Name IR Out DC Power
Outlet(5V/12V) Ext. SPK out
**UX340C-TA O - O

- 17 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
TROUBLESHOOTING GUIDE
1. Power-up boot check
Check stand-by Voltage.
P401 5, 6pin : +13.2V
Check stand-by Voltage
L403 : +13.2V
Check Mstar LVDS Output
Check Multi Voltage P401
7, 8pin : A13.2V
Check X101 clock
24 MHz
Check DRV ON Control
P401 11 pin : High
Change Module
Check IC405, IC404, IC400, Q406
Output Voltage
IC405 : 3.5V
IC404 : 1.5V
IC400 : 1.1V & 5V
Q406 : 3.3V
Check P401 PWR_ON.
1pin : 3.3V
Check LVDS Power Voltage
Q405 : 13.2V
Check 12pin Power
connector.
Replace L403.
Replace Mstar(IC101) or
Main Board
Replace Power Board
Replace X101.
Check Power Board.
Replace IC405, IC404,
IC400, Q406
Re-download software.
Replace Q405
Main B/D 13.2 V Line
Short Check
Replace Mstar(IC101) or Main
board
Replace Power
board.
No
No
No
No
No
No
No
No
No
ok
ok
ok
ok
ok
ok
ok
ok
ok
ok
No
ok

- 18 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
2. Digital/Analog TV Video
3. AV Video
Check RF Cable & Signal
Check input signal format.
Is it supported?
Check Tuner 3.3V Power
L3704
Check AV Cable for damage
for damage or open conductor
Check Mstar LVDS Output
Check Mstar LVDS Output
Check Tuner I2S
R3716, R3717
Check JK4400, CVBS Signal Line
R242
Check DEMOD_P/N Signal
TU3702, 25, 26, 27, 28 Pin
Check CVBS_DET Signal
R4410
Replace L3704
Replace Mstar(IC101) or
Main Board.
Replace Mstar(IC101) or
Main Board.
Replace Mstar(IC101) or
Main board
Replace Jack
Bad Tuner. Replace Tuner.
Replace R4410
No
No
No
No
No
No
No
ok
ok
ok
ok
ok
ok
ok
ok

- 19 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
4. RGB Video
Check input signal format.
Is it supported?
Check RGB Cable
for damage or open conductor.
Check Mstar LVDS Output.
Check P3300
R/G/B signal Line.
Check RGB_DET Signal.
Replace Mstar(IC101) or
Main Board.
Replace Jack.
Replace R3308.
No
No
No
ok
ok
ok
ok

- 20 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
5. HDMI Video
Check input signal format.
Is it supported?
Check HDMI Cable conductors
for damage or open conductor.
Check HDMI I2C Signal
D800, D801, D802.
Check HDMI_DET (HPD).
Check HDMI Signal.
Check EDID Downlaod.
Check JK,800, JK801.
Replace D800, D801, D802.
Replace HDMI1 R802, R805, Q800
HDMI2 R812, R813, R814.
Check other set.
If no problem, check signal line.
Replace the defective IC or
re-download EDID data.
Replace Jack.
No
No
No
No
No
ok
ok
ok
ok
ok
ok
Replace Main Board.
No
Check Mstar LVDS Output. Replace Mstar(IC101) or Main Board.
No
ok