CONFIDENTIAL
LED TV
SERVICE MANUAL
CHASSIS : UD74P
MODEL : 43UJ65** 43UJ65**-ZA
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL69879805 (1707-REV02)
Copyright © 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
CONTENTS
CONTENTS ............................................................................................... 2
SAFETY PRECAUTIONS ......................................................................... 3
SERVICING PRECAUTIONS..................................................................... 4
SPECIFICATION........................................................................................ 6
SOFTWARE UPDATE............................................................................... 11
BLOCK DIAGRAM ................................................................................... 12
EXPLODED VIEW ................................................................................... 25
DISASSEMBLY GUIDE .......................................................................... 26
TROUBLE SHOOTING GUIDE ................................................. APPENDIX
-2- Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
SAFETY PRECAUTIONS
IMPORTANT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the
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 Leakage Current Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet.
An isolation Transformer should always be used during the
servicing of a receiver whose chassis is not isolated from the AC Do not use a line Isolation Transformer during this check.
power line. Use a transformer of adequate power rating as this Connect 1.5 K / 10 watt resistor in parallel with a 0.15 uF capacitor
protects the technician from accidents resulting in personal injury between a known good earth ground (Water Pipe, Conduit, etc.)
from electrical shocks. and the exposed metallic parts.
Measure the AC voltage across the resistor using AC voltmeter
It will also protect the receiver and it's components from being with 1000 ohms/volt or more sensitivity.
damaged by accidental shorts of the circuitry that may be Reverse plug the AC cord into the AC outlet and repeat AC voltage
inadvertently introduced during the service operation. measurements for each exposed metallic part. Any voltage
measured must not exceed 0.75 volt RMS which is corresponds to
If any fuse (or Fusible Resistor) in this TV receiver is blown, 0.5 mA.
replace it with the specified. In case any measurement is out of the limits specified, there is
possibility of shock hazard and the set must be checked and
When replacing a high wattage resistor (Oxide Metal Film Resistor, repaired before it is returned to the customer.
over 1 W), keep the resistor 10 mm away from PCB.
Leakage Current Hot Check circuit
Keep wires away from high voltage or high temperature parts.
Before returning the receiver to the customer,
always perform an AC leakage current check on the exposed
metallic parts of the cabinet, such as antennas, terminals, etc., to
be sure the set is safe to operate without damage of electrical
shock.
Leakage Current Cold Check(Antenna Cold Check)
With the instrument AC plug removed from AC source, connect an
electrical jumper across the two AC plug prongs. Place the AC
switch in the on position, connect one lead of ohm-meter to the AC
plug prongs tied together and touch other ohm-meter lead in turn to
each exposed metallic parts such as antenna terminals, phone
jacks, etc.
If the exposed metallic part has a return path to the chassis, the
measured resistance should be between 1 MΩ and 5.2 MΩ.
When the exposed metal has no return path to the chassis the
reading must be infinite.
An other abnormality exists that must be corrected before the
receiver is returned to the customer.
-3- Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
SERVICING PRECAUTIONS
CAUTION: Before servicing receivers covered by this service 2. After removing an electrical assembly equipped with ES
manual and its supplements and addenda, read and follow the devices, place the assembly on a conductive surface such as
SAFETY PRECAUTIONS on page 3 of this publication. aluminum foil, to prevent electrostatic charge buildup or expo-
NOTE: If unforeseen circumstances create conflict between the sure of the assembly.
following servicing precautions and any of the safety precautions 3. Use only a grounded-tip soldering iron to solder or unsolder
on page 3 of this publication, always follow the safety precau- ES devices.
tions. Remember: Safety First. 4. Use only an anti-static type solder removal device. Some sol-
der removal devices not classified as “anti-static” can generate
General Servicing Precautions electrical charges sufficient to damage ES devices.
1. Always unplug the receiver AC power cord from the AC power 5. Do not use freon-propelled chemicals. These can generate
source before; electrical charges sufficient to damage ES devices.
a. Removing or reinstalling any component, circuit board 6. Do not remove a replacement ES device from its protective
module or any other receiver assembly. package until immediately before you are ready to install it.
b. Disconnecting or reconnecting any receiver electrical plug (Most replacement ES devices are packaged with leads elec-
or other electrical connection. trically shorted together by conductive foam, aluminum foil or
c. Connecting a test substitute in parallel with an electrolytic comparable conductive material).
capacitor in the receiver. 7. Immediately before removing the protective material from the
CAUTION: A wrong part substitution or incorrect polarity leads of a replacement ES device, touch the protective mate-
installation of electrolytic capacitors may result in an explo- rial to the chassis or circuit assembly into which the device will
sion hazard. be installed.
2. Test high voltage only by measuring it with an appropriate CAUTION: Be sure no power is applied to the chassis or cir-
high voltage meter or other voltage measuring device (DVM, cuit, and observe all other safety precautions.
FETVOM, etc) equipped with a suitable high voltage probe. 8. Minimize bodily motions when handling unpackaged replace-
Do not test high voltage by "drawing an arc". ment ES devices. (Otherwise harmless motion such as the
3. Do not spray chemicals on or near this receiver or any of its brushing together of your clothes fabric or the lifting of your
assemblies. foot from a carpeted floor can generate static electricity suf-
4. Unless specified otherwise in this service manual, clean ficient to damage an ES device.)
electrical contacts only by applying the following mixture to the
contacts with a pipe cleaner, cotton-tipped stick or comparable General Soldering Guidelines
non-abrasive applicator; 10 % (by volume) Acetone and 90 % 1. Use a grounded-tip, low-wattage soldering iron and appropri-
(by volume) isopropyl alcohol (90 % - 99 % strength) ate tip size and shape that will maintain tip temperature within
CAUTION: This is a flammable mixture. the range or 500 °F to 600 °F.
Unless specified otherwise in this service manual, lubrication 2. Use an appropriate gauge of RMA resin-core solder composed
of contacts in not required. of 60 parts tin/40 parts lead.
5. Do not defeat any plug/socket B+ voltage interlocks with which 3. Keep the soldering iron tip clean and well tinned.
receivers covered by this service manual might be equipped. 4. Thoroughly clean the surfaces to be soldered. Use a mall wire-
6. Do not apply AC power to this instrument and/or any of its bristle (0.5 inch, or 1.25 cm) brush with a metal handle.
electrical assemblies unless all solid-state device heat sinks Do not use freon-propelled spray-on cleaners.
are correctly installed. 5. Use the following unsoldering technique
7. Always connect the test receiver ground lead to the receiver a. Allow the soldering iron tip to reach normal temperature.
chassis ground before connecting the test receiver positive (500 °F to 600 °F)
lead. b. Heat the component lead until the solder melts.
Always remove the test receiver ground lead last. c. Quickly draw the melted solder with an anti-static, suction-
8. Use with this receiver only the test fixtures specified in this type solder removal device or with solder braid.
service manual. CAUTION: Work quickly to avoid overheating the circuit
CAUTION: Do not connect the test fixture ground strap to any board printed foil.
heat sink in this receiver. 6. Use the following soldering technique.
a. Allow the soldering iron tip to reach a normal temperature
Electrostatically Sensitive (ES) Devices (500 °F to 600 °F)
Some semiconductor (solid-state) devices can be damaged eas- b. First, hold the soldering iron tip and solder the strand
ily by static electricity. Such components commonly are called against the component lead until the solder melts.
Electrostatically Sensitive (ES) Devices. Examples of typical ES c. Quickly move the soldering iron tip to the junction of the
devices are integrated circuits and some field-effect transistors component lead and the printed circuit foil, and hold it there
and semiconductor “chip” components. The following techniques only until the solder flows onto and around both the compo-
should be used to help reduce the incidence of component dam- nent lead and the foil.
age caused by static by static electricity. CAUTION: Work quickly to avoid overheating the circuit
1. Immediately before handling any semiconductor component or board printed foil.
semiconductor-equipped assembly, drain off any electrostatic d. Closely inspect the solder area and remove any excess or
charge on your body by touching a known earth ground. Alter- splashed solder with a small wire-bristle brush.
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.
-4- Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
IC Remove/Replacement 3. Solder the connections.
Some chassis circuit boards have slotted holes (oblong) through CAUTION: Maintain original spacing between the replaced
which the IC leads are inserted and then bent flat against the cir- component and adjacent components and the circuit board to
cuit foil. When holes are the slotted type, the following technique prevent excessive component temperatures.
should be used to remove and replace the IC. When working with
boards using the familiar round hole, use the standard technique Circuit Board Foil Repair
as outlined in paragraphs 5 and 6 above. Excessive heat applied to the copper foil of any printed circuit
board will weaken the adhesive that bonds the foil to the circuit
Removal board causing the foil to separate from or "lift-off" the board. The
1. Desolder and straighten each IC lead in one operation by following guidelines and procedures should be followed when-
gently prying up on the lead with the soldering iron tip as the ever this condition is encountered.
solder melts.
2. Draw away the melted solder with an anti-static suction-type At IC Connections
solder removal device (or with solder braid) before removing To repair a defective copper pattern at IC connections use the
the IC. following procedure to install a jumper wire on the copper pattern
Replacement side of the circuit board. (Use this technique only on IC connec-
1. Carefully insert the replacement IC in the circuit board. tions).
2. Carefully bend each IC lead against the circuit foil pad and
solder it. 1. Carefully remove the damaged copper pattern with a sharp
3. Clean the soldered areas with a small wire-bristle brush. knife. (Remove only as much copper as absolutely necessary).
(It is not necessary to reapply acrylic coating to the areas). 2. carefully scratch away the solder resist and acrylic coating (if
used) from the end of the remaining copper pattern.
"Small-Signal" Discrete Transistor 3. Bend a small "U" in one end of a small gauge jumper wire and
Removal/Replacement carefully crimp it around the IC pin. Solder the IC connection.
1. Remove the defective transistor by clipping its leads as close 4. Route the jumper wire along the path of the out-away copper
as possible to the component body. pattern and let it overlap the previously scraped end of the
2. Bend into a "U" shape the end of each of three leads remain- good copper pattern. Solder the overlapped area and clip off
ing on the circuit board. any excess jumper wire.
3. Bend into a "U" shape the replacement transistor leads.
4. Connect the replacement transistor leads to the corresponding At Other Connections
leads extending from the circuit board and crimp the "U" with Use the following technique to repair the defective copper pattern
long nose pliers to insure metal to metal contact then solder at connections other than IC Pins. This technique involves the
each connection. installation of a jumper wire on the component side of the circuit
board.
Power Output, Transistor Device
Removal/Replacement 1. Remove the defective copper pattern with a sharp knife.
1. Heat and remove all solder from around the transistor leads. Remove at least 1/4 inch of copper, to ensure that a hazardous
2. Remove the heat sink mounting screw (if so equipped). condition will not exist if the jumper wire opens.
3. Carefully remove the transistor from the heat sink of the circuit 2. Trace along the copper pattern from both sides of the pattern
board. break and locate the nearest component that is directly con-
4. Insert new transistor in the circuit board. nected to the affected copper pattern.
5. Solder each transistor lead, and clip off excess lead. 3. Connect insulated 20-gauge jumper wire from the lead of the
6. Replace heat sink. nearest component on one side of the pattern break to the
lead of the nearest component on the other side.
Diode Removal/Replacement Carefully crimp and solder the connections.
1. Remove defective diode by clipping its leads as close as pos- CAUTION: Be sure the insulated jumper wire is dressed so the
sible to diode body. it does not touch components or sharp edges.
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.
-5- Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement.
1. Application range 3. Test method
This specification is applied to the LED TV with UD74P chassis. (1) Performance: LGE TV test method followed
(2) Demanded other specification
- Safety : CE, IEC specification
- EMC : CE, IEC specification
2. Requirement for Test - Wireless : Wireless HD Specification (Option)
Each part is tested as below without special appointment.
(1) Temperature: 25 °C ± 5 °C(77 °F ± 9 °F), CST: 40 °C ± 5 °C
(2) Relative Humidity: 65 % ± 10 %
(3) Power Voltage
: Standard input voltage (AC 100~240 V, 50/60 Hz)
* Standard Voltage of each products is marked by models.
(4) Specification and performance of each parts are followed
each drawing and specification by part number in
accordance with BOM.
(5) The receiver must be operated for about 20 minutes prior
to the adjustment.
4. Model General Specification
No. Item Specification Remarks
DTV & Analog (Total 37 countries)
DTV (MPEG2/4, DVB-T) : 26 countrie
Germany, Netherland, Switzerland, Hungary, Austria, Slovenia, Bulgaria,
France, Spain, , Belgium, Luxemburg, Greece, Czech, Turkey, Morocco,
Ireland, Latvia, Estonia, Lithuania, Poland, Portugal, Romania, Albania,
Bosnia, Slovakia, Belarus
DTV (MPEG2/4, DVB-T2) :11 countries
UK(Ireland), Sweden, Denmark, Finland, Norway, Ukraine, Kazakhstan,
Russia, Italy, Croatia, Serbia
DTV (MPEG2/4, DVB-C) : 37 countries
Germany, Netherland, Switzerland, Hungary, Austria, Slovenia, Bulgaria,
France, Spain, Italy, Belgium, Russia, Luxemburg, Greece, Czech, Croa-
tia, Turkey, Morocco, Ireland, Latvia, Estonia, Lithuania, Poland, Portugal,
1 Market EU/CIS(PAL Market-37Countries) Romania, Albania, Bosnia, Serbia, Slovakia, Belarus, UK, Sweden, Den-
mark, Finland, Norway, Ukraine, Kazakhstan
DTV (MPEG2/4,DVB-S) : 37 countries
Germany, Netherland, Switzerland, Hungary, Austria, Slovenia, Bulgaria,
France, Spain,Belgium, Luxemburg, Greece, Czech, Turkey, Morocco,
Ireland, Latvia, Estonia, Lithuania, Poland, Portugal, Romania, Albania,
Bosnia, Slovakia, Belarus, UK(Ireland), Sweden, Denmark, Finland, Nor-
way, Ukraine, Kazakhstan,Russia, Italy, Croatia, Serbia
Supported satellite : 35 satellites
ABS1 75.0E , AMOS 4.0W , ASIASAT3S 105.5E , ASTRA 19.2E , ASTRA
23.5E , ASTRA 28.2E , ASTRA 4.8E, ATLANTIC BIRD2 8.0W , ATLANTIC
BIRD3 5.0W , BADR 26.0E , DIRECTV-1R 56.0E , EUROBIRD 9A 9.0E ,
EUROBIRD3 33.0E , EUTELSAT 36 A/B 36.0E ,
EUTELSAT W2A 10.0E , EUTELSAT W3A 7.0E , EUTELSAT7WA 7.3W
-6- Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
No. Item Specification Remarks
1 ) PAL/SECAM B/G/I/D/K
2 Broadcasting system SECAM L/L’
2 ) DVB-T/T2, C, S/S2
1 ) Digital TV
-VHF, UHF
-C-Band, Ku-Band
2) Analogue TV
3 Program coverage
-VHF : E2 to E12
-UHF : E21 to E69
-CATV : S1 to S20
-HYPER : S21 to S47
► DVB-T
- Guard Interval(Bitrate_Mbit/s)
1/4, 1/8, 1/16, 1/32
- Modulation : Code Rate
QPSK : 1/2, 2/3, 3/4, 5/6, 7/8
16-QAM : 1/2, 2/3, 3/4, 5/6, 7/8
64-QAM : 1/2, 2/3, 3/4, 5/6, 7/8
► DVB-T2
- Guard Interval(Bitrate_Mbit/s)
1/4, 1/8, 1/16, 1/32, 1/128, 19/128, 19/256,
- Modulation : Code Rate
QPSK : 1/2, 2/5, 2/3, 3/4, 5/6
16-QAM : 1/2, 2/5, 2/3, 3/4, 5/6
Analog : Upper Heterodyne 64-QAM : 1/2, 2/5, 2/3, 3/4, 5/6
4 Receiving system
Digital : COFDM, QAM 256-QAM : 1/2, 2/5, 2/3, 3/4, 5/6
► DVB-C
- Symbolrate :
4.0Msymbols/s to 7.2Msymbols/s
- Modulation :
16QAM, 64-QAM, 128-QAM and 256-QAM
► DVB-S/S2
- Symbolrate
DVB-S2 (8PSK / QPSK) : 2 ~ 45Msymbol/s
DVB-S (QPSK) : 2 ~ 45Msymbol/s
- 9 iterbi
DVB-S mode : 1/2, 2/3, 3/4, 5/6, 7/8
DVB-S2 mode : 1/2, 2/3, 3/4, 3/5, 4/5, 5/6, 8/9, 9/10
5 Input Voltage AC 100 ~ 240V 50/60Hz
-7- Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
5. External Input Format
5.1. 2D Mode
5.1.1. Component input(Y, CB/PB, CR/PR)
No Resolution H-freq(kHz) V-freq(Hz) Pixel clock(MHz) Proposed
1 720*480 15.73 59.94 13.50 SDTV ,DVD 480i
2 720*480 15.75 60.00 13.5135 SDTV ,DVD 480i
3 720*576 15.62 50.00 13.50 SDTV 576i
4 720*480 31.47 59.94 27.00 SDTV 480p
5 720*480 31.50 60.00 27.027 SDTV 480p
6 720*576 31.25 50.00 27.00 SDTV 576p
7 1280*720 44.96 59.94 74.175 HDTV 720p
8 1280*720 45.00 60.00 74.250 HDTV 720p
9 1280*720 37.50 50.00 74.250 HDTV 720p
10 1920*1080 28.12 50.00 74.250 HDTV 1080i
11 1920*1080 33.72 59.94 74.175 HDTV 1080i
12 1920*1080 33.75 60.00 74.250 HDTV 1080i
13 1920*1080 56.25 50.00 148.50 HDTV 1080p
14 1920*1080 67.43 59.94 148.350 HDTV 1080p
15 1920*1080 67.50 60.00 148.50 HDTV 1080p
5.1.2. HDMI Input (PC)
No Resolution H-freq(kHz) V-freq(Hz) Pixel clock(MHz) Proposed Remarks
1 640*350 31.46 70.09 25.17 EGA
2 720*400 31.46 70.08 28.32 DOS
3 640*480 31.46 59.94 25.17 VESA(VGA)
4 800*600 37.87 60.31 40.00 VESA(SVGA)
5 1024*768 48.36 60.00 65.00 VESA(XGA)
6 1152*864 54.34 60.05 80.00 VESA
7 1360*768 47.71 60.01 85.00 VESA(WXGA)
8 1280*1024 63.98 60.02 109.00 VESA(SXGA) FHD, UHD only
9 1920*1080 67.50 60.00 158.40 WUXGA(CEA 861D) FHD, UHD only
10 3840*2160 54.00 24.00 297.00 UDTV 2160P UHD only
11 3840*2160 56.25 25.00 297.00 UDTV 2160P UHD only
12 3840*2160 67.50 30.00 297.00 UDTV 2160P UHD only
13 4096*2160 53.95 23.97 296.703 UDTV 2160P UHD only
14 4096*2160 54.00 24.00 297.00 UDTV 2160P UHD only
-8- Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
5.1.3. HDMI Input (DTV)
No Resolution H-freq(kHz) V-freq(Hz) Pixel clock(MHz) Proposed Remarks
1 640*480 31.46 59.94 25.13 SDTV 480P
2 640*480 31.50 60.00 25.13 SDTV 480P
3 720*480 15.73 59.94 13.50 SDTV, DVD 480I(525I)
4 720*480 15.75 60.00 13.51 SDTV, DVD 480I(525I) Spec. out but display
5 720*576 15.62 50.00 13.50 SDTV, DVD 576I(625I) 50Hz
6 720*480 31.47 59.94 27.00 SDTV 480P
7 720*480 31.50 60.00 27.03 SDTV 480P
8 720*576 31.25 50.00 27.00 SDTV 576P
9 1280*720 44.96 59.94 74.18 HDTV 720P
10 1280*720 45.00 60.00 74.25 HDTV 720P
11 1280*720 37.50 50.00 74.25 HDTV 720P
12 1920*1080 28.12 50.00 74.25 HDTV 1080I
13 1920*1080 33.72 59.94 74.18 HDTV 1080I
14 1920*1080 33.75 60.00 74.25 HDTV 1080I
15 1920*1080 26.97 23.97 63.30 HDTV 1080P
16 1920*1080 27.00 24.00 63.36 HDTV 1080P
17 1920*1080 33.71 29.97 79.12 HDTV 1080P
18 1920*1080 33.75 30.00 79.20 HDTV 1080P
19 1920*1080 56.25 50.00 148.50 HDTV 1080P
20 1920*1080 67.43 59.94 148.35 HDTV 1080P
21 1920*1080 67.50 60.00 148.50 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(DVB) UHD only
28 3840*2160 134.86 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(DVB) UHD only
36 4096*2160 134.86 59.94 593.41 UDTV 2160P UHD only
37 4096*2160 135.00 60.00 594.00 UDTV 2160P UHD only
-9- Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
5.2. 3D Mode - DTV/HDMI/USB
5.2.1. RF Input
No. Resolution H-freq(kHz) V-freq(Hz) Pixel clock(MHz) Proposed 3D input proposed mode
2D to 3D, Side by Side,
1 1280*720 37.50 50 74.25 HDTV 720P
Top & Bottom
2D to 3D, Side by Side,
2 1920*1080 28.13 50 74.25 HDTV 1080I
Top & Bottom
- 10 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
SOFTWARE UPDATE
1. USB 2. NSU
(1) Insert the USB memory Stick to the USB port. (1) Menu -> All Settings -> General -> About This TV
(2) Automatically detect the SW Version and show the below
message
(2) C lick [CHEK FOR UPDATES] : system check newest
(3) Click [YES]: initiate the download and install of the update. version
(4) Click [Check Now]: move to “About This TV” page for (3) Click [DOWNLOAD AND INSTALL]
update. (4) TV is updating
(5) TV is updating.
(5) After finished the update, below Pop-up appear
(6) After finished the update, below Pop-up appear.
(6) Turn OFF the TV and On. Check the updated SW Version
and Tool Option
(7) Click [Yes] : TV will be DC OFF -> ON
(8) After TV turned on, Check the updated SW Version and
Tool Option.
- 11 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
DDR3 2133 X 32 X_TAL
(512MB X 2EA) 27MHz
Hynix 20nm
K3L only. (K3Lp 256MB x 2ea SoC )
P_TS_IN
DDR3 2133 X 32
M1 M0 CI Slot
(512MB X 2EA) P_TS_OUT
SMARTCARD_I/F B-CAS
EPI block B-CAS B-CAS
controller (JAPAN)
Level EPI PMIC I2C 6
shifter (SW50B3A) I2C 4 NVRAM (256Kb)
eMMC (4GB)
Vx1 51P (8 lane) : LGD 60/65/70/75 Toshiba 15nm
Vx1 / EPI Realtek OCP K3L only
1. K3Lp Block Diagram (External)
EPI 60Px2 (3G, 6 lane) : LGD 43/49/55 USB1 (3.0)
I2C 6
CEDS 68Px2 (1.5G, 12 lane) : BOE K3Lp USB2 (2.0)
OCP
USB3 (2.0)
HDMI1
I2S Out
- 12 -
MAIN Audio AMP HDMI2(ARC) HDMI 6G 4
(DTA2010M) I2C 4
HDMI3
HDMI4 (EEPROM)
TS
Sub Micom TS
X_TAL I2C 1 T2/C/S2 NIM tuner
(RENESAS
BLOCK DIAGRAM
32.768KHz R5F100GEAFB)
Copyright ©
Demode
USB_WIFI
SPDIF OUT
CVBS/YPbPr
ETHERNET
I2C 2 (T/C/S/T2/S2)
RF IC
IR / KEY(1Key)
LOGO LIGHT(Ready) LNB
MAX323
AMP
(DT1805)
WIFI/BT Combo Air/
DVB-S
MTK IC Cable
Only for training and service purposes.
SPDIF
LAN REAR(H)
Sub Assy
H/P
RS-232
AV/COMP
LG Electronics. Inc. All rights reserved.
2. K3Lp Block Diagram (Internal)
- 13 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
BOE Panel
LGD Panel
K3Lp 3840x2160@60p
3840x2160@60p
1.5Gbps
3Gbps
LOCKOUT12
[GPIO_5_VBY_LOCK/EPLOCK]
CEDS/EPI 6Lane 68Pin
[EPI_TX12~EPI_TX23] EPI 3Lane 60P
[GPIO_2_TCON_SCL/TCON_9] GAMMA
(RT6508) GMA
3. EPI / CEDS Block Diagram
[GPIO_1_TCON_SDA/TCON_5] BOE Only (2, 3, 4, 7, 8,
11, 12, 15, 16, 17) 60pin
68pin
VDD, VCORE
CLK(x10)
Boost/Buck VCOM1
SWG VCOMLFB / VCOMRFB
(RT5043A) VCOM2
SWO VGL1
SWI VST
GIP_RST
- 14 -
[GPIO019_DAC_OUT]
LS_VGL
[GPIO_0_DAC_SCLK] GST, E/O, MCLK, GLCK PMIC VGH_EVEN
[GPIO_4_VBY_HTPD/TCON_14] & VGH_ODD
[GPO_1_TCON_I2C_EN/TCON_2] HVDD
Level Shifter GMA
PMIC_RESET SW50B3A(LGD) (1, 5, 6, 9, 10, 13, 24,18)
[GPIO7_PMIC_RESET]
SW5253(BOE)
Copyright ©
[EPI_TX12~EPI_TX23] CEDS/EPI 6Lane 68pin
EPI 3Lane 60P
LOCKAn_IN
[GPIO_5_VBY_LOCK/EPLOCK]
[GPIO_4_VBY_HTPD/TCON_14] HTPDA IN
HTPDAn_IN
60pin
68pin
Only for training and service purposes.
LG Electronics. Inc. All rights reserved.
+3.3V_NORMAL
4. Tuner
+ DEMOD_CORE +3.3V_NORMAL
17Y Tuner [B1_+3.3V_RF] 3
1.8K ȳ
[+3.3V_DEMOD_TU] 11
[B3_+1.2V_DEMOD] 13 33 ȳ 5 [SCL]
LNB
6 [SDA]
LNB_TX IC7001
[LNB_TX1] 12 8 [TONECTRL]
[LNB] 26(Full NIM) / [LNB] 26(Half NIM) LNB_OUT 2 [LNB] DT1805
[SCL_RF] 1
[SDA_RF] 2 33 ȳ
I2C_SCL2 AA5 / Y4 [GPIO52_TUNER0_SCL]
I2C_SDA2 AA6 / AA4 [GPIO51_TUNER0_SDA]
[SCL_DEMOD] 36 33 ȳ
[SDA_DEMOD] 35 TU_JP AF4 [GPIO54_TUNER1_SCL] Reserved
Reserv Tuner_only
r ed for Dual Tuner_on
nly
l K3L
AF5 [GPIO53_TUNER1_SDA]
A
[M_ERROR] 14 FE_DEMOD1_TS_ERROR
FE_DEMOD1_TS_CLK AB5 / AB2 [GPIO57_TP0_CLK]
[M_MCLK] 15
FE_DEMOD1_TS_SYNC AB6 / AA3 [GPIO56_TP0_SYC]
[M_SYNC] 16
FE_DEMOD1_TS_VAL AB4 / AC2 [GPIO58_TP0_VAL]
[M_VALID] 17
FE_DEMOD1_TS_DATA [0-7]
FE_DEMOD1_TS_DATA[0-7] 18-25 [GPIO59~66_TP0_D0~TP0_D7]
FE_DEMOD2_TS_ERROR
[S_ERROR] 28 FE_DEMOD1_TS_1_DATA[4]
[S_MCLK] 33 FE_DEMOD1_TS_1_DATA[3]
[S_SYNC]30 FE_DEMOD1_TS_1_DATA[2]
[S_VAL] 31
K3Lp
- 15 -
FE_DEMOD1_TS_1_DATA[1] RTK
[S_DATA]32
+2.5V_Normal
[B4_+2.5V_DEMOD] 29
Copyright ©
TU_JAPAN /TU_RESET2
[/TU_RESET2_TU] 34 AA3 / M2 [VINGP_DEMOD_RESET]
/TU_RESET1
[/TU_RESET1_TU] 10 JAPAN_OPT AB2 / L1 [VINRP_TUNER0_REST]
IF_S_IP
[IF_S_IP_MAIN] 59 AF3 / W2 [IP_1]
IF_S_IN
[IF_S_IN_MAIN] 60 AG1 / W3 [IN_1]
IF_S_QP
[IF_S_QP_MAIN] 62 AG2 / Y2 [QP_2]
[IF_S_QN_MAIN] 61 IF_S_QN AG3 / Y3 [QN_2]
IF_P
[IF_P_TU] 8
AE1 / U2 [IF_P]
IF_N
Only for training and service purposes.
[IF_N_TU] 7
AE2 / U3 [IF_N]
[TU_SIF] 6 TUNER_SIF (OPT : TU_EXT_ATV)
AE3 / V2 [SIF]
[TU_CVBS_TU] 4 TU_CVBS (OPT : TU_EXT_ATV)
Y5 / R5 [VIN10P]
[IF_AGC_TU] 5 IF_AGC
Y4 / W4 [GPIO55_RF_IF_AGC1]
LG Electronics. Inc. All rights reserved.
AV/COMP
AV1_CVBS_DET
[H5] AIO1L_AV1_CVBS_DET
COMP1/AV1/DVI_L_IN [M5] AI1L
SPDIF_OUT
COMP1/AV1/DVI_R_IN [M4] AI1R GPIO_6_SPDIF_OUT_0 [E3] SPDIF
[N3] VIN 3P
COMP1_Pb [P3] VIN 5P
COMP1_Pr [P2] VIN 4P
COMP1_Y/CVBS [H4] AI3R_COMP1_DET AUD_SCK
GPIO021_SCLK[C2] [38] CLK_I
5. Video & Audio IN/OUT
COMP1_DET AUD_LRCK SPK_L+ / L-
GPO_0_I2S_WCLK/SPDIF_OUT_1[D13] [8] WCK
AUD_LRCH [30, 33] LPF
GPIO15_D0 [B3] [7] SDATA SPK L
AI2R_AMP_SDA [G4] I2C_SDA/SCL_AMP MAIN AMP
[10,11]
AI3L_AMP_SCL [G5] DTA2010M
AMP_RESET_N SPK_R+ / R-
AI2L_AMP_RESET_N [F5] [36] (IC5800)
[18, 21] LPF SPK R
[12]
Realtek
- 16 -
TU_SIF K3Lp
[V2] SIF
AMP_MUTE
22
Tuner
MICOM
Copyright ©
26
SIDE_HP_MUTE
HP_LOUT_AMP
H/P AMP HP_ROUT_AMP
GPIO_35_HPOL [N5] HP_L/ROUT TPA6138A2
GPIO_36_HPOR [N4] LPF H/P Jack
(IC6300)
AIO2L_HP_DET[J5]
HP_DET
ST_GPIO_23_H0_ARC[AG13]
Only for training and service purposes.
HDMI_ARC
HDMI2
LG Electronics. Inc. All rights reserved.
HDMI2.0_1_5V_DET
ST_GPIO_19_5V_DET_HDMI_0
HDMI2.0_1_HPD
ST_GPIO_18_H0_HPD
ST_GPIO_21_H0_SCL DDC_SCL1 / DDC_SDA1
ST_GPIO_20_H0_SDA
TMDS1 - D0/D1/D2/CLK
P0_CKN/P_RGB_N/P
6. HDMI 2.0 Block
HDMI1
HDMI_CEC
HDMI2.0_2_5V_DET
ST_GPIO_15_5V_DET_HDMI_1
HDMI2.0_2_HPD
ST_GPIO_14_H1_HPD
ST_GPIO_17_H1_SCL DDC_SCL2 / DDC_SDA2
ST_GPIO_16_H1_SDA
ST_GPIO_23_H0_ARC HDMI_ARC
TMDS2 - D0/D1/D2/CLK
P1_CKN/P_RGB_N/P HDMI2 with ARC
HDMI_CEC
REALTEK
HDMI2.0_3_5V_DET
- 17 -
K3Lp ST_GPIO_10_5V_DET_HDMI_2
HDMI2.0_3_HPD
ST_GPIO_11_H2_HPD
ST_GPIO_13_H2_SCL DDC_SCL3 / DDC_SDA3
ST_GPIO_12_H2_SDA
TMDS3 - D0/D1/D2/CLK
P2_CKN/P_RGB_N/P
HDMI3
Copyright ©
HDMI_CEC
HDMI2.0_4_5V_DET
ST_GPIO_07_5V_DET_HDMI_3
HDMI2.0_4_HPD
ST_GPIO_06_H3_HPD
ST_GPIO_09_H3_SCL DDC_SCL4 / DDC_SDA4
ST_GPIO_08_H3_SDA
TMDS4 - D0/D1/D2/CLK
P3_CKN/P_RGB_N/P
HDMI4
Only for training and service purposes.
MICOM
R5F100GEAFB
(IC3000)
LG Electronics. Inc. All rights reserved.
+5V_USB2.0_3
USB_OCD3 [AG22] DCDC OCP
USB_CTL3 [AH19] BD2242G
(IC4700)
DCDC OCP +5V_USB2.0_2
USB_OCD2 [AJ18]
BD2242G
USB_CTL2 [AG20]
(IC4501)
USB2.0_2_DM / DP
HSDM1[AM24] USB1
HSDP1[AL24]
HSDM2[AM25] USB2.0_3_DM / DP
USB2
HSDP2[AL25]
HSDM0 [G1] WIFI_DM / DP
Realtek HSDP0 [G2]
5 WOL/WIFI_POWER_ON
K3Lp 7 BT_RESET
Wafer 9 BT_WAKEUP_DEVICE
(P4000)10 BT_WAKEUP_HOST
- 18 -
19 IR
7. USB / WIFI / M-REMOTE / UART(Debug)
20
LED_R
23
24 KEY2
DEBUG UART DEBUG_RX / TX [AH5] ST_GPIO_02_VGA_SDA KEY1
Wafer [AG5] ST_GPIO_01_VGA_SCL
(P201)
PHONE JACK
Copyright ©
SOC_RX / TX RS232C
ST_GPIO_25_UART0/1[AH13]
ST_GPIO_24_UART0/1[AG14] (IC7200) DOUT1
RIN1
Wafer
(P200)
MICOM
R5F100GEAFB
SOC_RX / TX (IC3000)
Only for training and service purposes.
LG Electronics. Inc. All rights reserved.
EPI / CEDS only
SW50B3A(LGD) I2C_SCL6
SW5253A(BOE) [GPIO_2_TCON_SCL/TC
33 ȳ I2C_SDA6 ON_9]
8. K3Lp I2C Map
EPI PMIC [GPIO_1_TCON_SDA/TC
ON_5]
1.8k ȳ
1.8k ȳ
I2C_SCL4
[AI3L_AMP_SCL] DTA2010M
I2C_SDA4 100ȳ
[AI2R_AMP_SDA] AMP
+3.3V_NOR
1.8k ȳ
1.8k ȳ
33 ȳ FT24C256A-ESR-T
K3Lp NVRAM
+3.3V_NOR
- 19 -
I2C_SCL_1 I2C_SCL2
Copyright ©
[ST_GPIO_27_MICRO_SCL][GPIO_52_TUNER0_SCL]
R5F100GEAFB#30 DT1805
33 ȳ I2C_SDA_1 [ST_GPIO_26_MICRO_SDA] I2C_SDA2 33 ȳ
MICOM [GPIO_51_TUNER0_SDA] LNB
33 ȳ
1.8 k ȳ
1.8 k ȳ
1.8k ȳ
1.8k ȳ
+3.3V_NOR TDJN-G501D
+3.5V_ST
TUNER
Only for training and service purposes.
LG Electronics. Inc. All rights reserved.
INSTANT_BOOT [ST_GPIO_00_WOL_WAKE_UP]
MICOM WOL/ETH_POWER_ON [ST_GPIO_05_IR_RX]
SOC_RESET [RST]
9. GPIO(K3Lp)
VID_CORE
[VINBN_VIDCORE] CORE DCDC
HW option BIT0~4 [AH16,AH17,AG16,AG17,AJ16]
ADC 1~5
/TU_RESET1
[VINRP_TUNER0_REST]
/TU_RESET2 Tuner
[VINGP_DEMOD_RESET]
AMP_RESET_N
[AI2L_AMP_RESET_N] Audio AMP
PCM_RESET
[GPIO_119_PC_RST]
CI_SLOT CI power PCM_5V_CTL [AIO2R_CMD_VCC_SC] COMP1_DET
enable control [AI3R_COMP1_DET] Component/AV Jack
AV1_CVBS_DET
[AIO1L_AV1_CVBS_DET]
K3Lp
LOCKAn HP_DET
- 20 -
[GPIO_5_VBY_LOCK/EPLOCK] [AIO2L_HP_DET] H/P Jack
Panel
SMARTCARD_PWR_SEL
[VDBSOUT_SC_PWR_SEL] Japan B-CAS
Copyright ©
EPI_GCLK
[GPO_1_TCON_I2C_EN/TCON_2]
PMIC EPI_MCLK [GPIO_4_VBY_HTPD/TCON_14]
PMIC_RESET [GPIO7_PMIC_RESET]
PWM_DIM [GPIO010_PWM_DIM_0]
PWM_DIM2 [GPO011_PWM_DIM_1]
[GPIO_79_USB_PWR0_SD_WP] USB_CTL2
L/DIM_M0_SCLK [GPO012_LD_SPI1_SCK] /USB_OCD2 USB2_2.0 OCP USB2
POWER [RTC_XO_USBOCD0]
L/DIM_M0_MOSI [GPO013_LD_SPI1_SDO]
L/DIM_M0_VS [GPO014_LD_SPI1_SYNC] [GPIO_78_USB_PWR1_SD_CD] USB_CTL3
Only for training and service purposes.
/USB_OCD3 USB3_2.0 OCP USB3
[RTC_XI_USBOCD1]
LG Electronics. Inc. All rights reserved.
13V-5V NORMAL DCDC 3.3V NORMAL DCDC
I2C_SCL_MICOM / I2C_SDA_MICOM POWER_ON/OFF1
[P17/TI02/TO02] 15 IC2500 IC2300
1 [P60/SCLA0] / 2 [P61/SDAA0]
WOL/ETH_POWER_ON TPS564208 TPS563208
RTK ˀ K3L 13 [P50//INTP1/SI11/SDA11]
IC100 SOC_RESET 18 [P14/RXD2/SI20/SDA20] 1.5V DCDC
35 [P00/TI00/TXD1] IC2303
INSTANT_BOOT [P01/TO00/RXD1] 34 POWER_ON/OFF2_4 SYVL83
SYSTEM_DEBUG 33 [P130]
POWER_ON/OFF2_3 0.95V CORE/CPU DCDC 1.8V eMMC LDO 1.2V Demod LDO
[P72/KR2/SO21] 9 IC2302 IC2301 IC6900
RS232C SOC_RX/TX 20 [P12/SO00/TXD0/TOOLTXD] TPS51362RVER TJ4320GDP-ADJ TJ4320GDP-ADJ
CONTROL I/F
IC7200 21 [P11/SI00/RXD0/TOOLRXD/SDA00]
AMP OPT0 NON LOGO LCD/LOGO LCD
AMP_MUTE
IC5800 22 [P10/SCK00/SCL00] [P25/ANI5] 27
NON LOGO OLED/LOGO OLED
DTA2010M [P24/ANI4] 28 MODEL1_OPT_0/1/2/ 3 OPT1 TV-NON EPI/BOX/TV EPI/BOX
1.0V DCDC Eth STDBY WOL_CTL [P23/ANI3] 29
OTP2 RESERVED/ RESERVED/9_KEY/9_KEY_NON
IC2307 17 [P15/PCLBUZ1/SCK20/SCL20] [P22/ANI2] 30
OPT3 M16/RTK/H15
TLV62565DBVR
HP AMP SIDE_HP_MUTE
IC6300 26 [P26/ANI6] MICOM_DEBUG MICOM DEBUG 4P
[P40/TOOL0] 39
TPA6138A2 P3000
[RESET] 40 MICOM_RESET
10. GPIO(MICOM – RENESAS)
12507WS-04L
RESET IC POWER_DET
14 [P51/INTP2/SO11] MICOM X-TAL
IC1300 [P124/XT2/EXCLKS] 41
X3000
[P123/XT1] 42
32.768KHz
HDMI 1 / 2 / 3 /4 HDMI_CEC 7 [P74/KR4/INTP8/SI01/SDA01]
JK3101/JK3102/JK3103/JK3104
INV_CTL 4 [P63] EWBS_TUNER
[P16/TI01/TO01/INTP5] 16 EWBS_TU
- 21 -
POWER WAFER MODE_SELECT_PWM1 5 [P31/TI/03/TO03/INTP4] TUxxxx
P1001 36 [P140/PCLBUZ0/INTP6]
RL_ON
EDID_WP HDMI EXT EDID
[P146] 23 IC3401
IR 6 [P75/KR5/INTP9/SCK01/SCL01] BR24G02FJ
EYE_SCL / EYE_SDA 10 [P71/KR1/SI21/SDA21] / 11 [P70/KR0/SIK21/SCL21]
AM_MODE_DET_OLED
BT_WAKEUP_DEVICE 8 [P73/KR3/SO01] [P137/INTP0] 43
Copyright ©
IR / KEY/WIFI/BT WOL/WIFI_POWER_ON 12 [P30/INTP3/RTC1HZ/SCK11/SCL11]] T_CON_SYS_POWER_OFF_OLED
P4000 [P122/X2/EXCLK] 44
COMBO_RESET 24 [P147/ANI18]
BT_WAKEUP_HOST 25 [P27/ANI7] RETENTION_DISABLE
[P121/X1] 45
KEY1 / KEY2 31 [P21/ANI1/AVREFM] / 32 [P20/ANI0/AVREFP]
3D&L_DIM_EN
LED_R 38 [P41/TI07/TO07] [P62] 3 51P VX1 Wafer
GND WIFI_EN
37 [P120/ANI19] * Depending on Model
+3.5V WIFI
Only for training and service purposes.
GND
19 [P13/TXD2/SDA20]
+13V TO PANEL_VCC PANEL_CTL
LG Electronics. Inc. All rights reserved.
K3L_DDR_0_ADDR_[0:14]
DDR3 IC400 DDR3 IC401
DC1_A [0:14] A[0:14] A[0:14]
11. DDR Block
DC1_CSB K3L_DDR_0_CON_CS 0
~CS K3L_DDR_0_CON_CS 1
DC1_CSB_1 ~CS
K3L_DDR_0_CON_BA[
DC1_BA [0:2] BA[0:2] BA[0:2]
0:2]
K3L_DDR_0_CLK_ P/N
DC1_CLK / CLKB CK / ~CK CK / ~CK
K3L_DDR_0_CON_CKE
DC1_CKE CKE CKE
K3L_DDR_0_CON_ODT
K3Lp DC1_ODT ODT ODT
K3L_DDR_0_CON_RA 1k ohm
- 22 -
DC1_RAS / CAS SN /CASN RAS/CAS RAS/CAS
K3L_DDR_0_CON_WEN
DC1_WE WEN WEN
Copyright ©
K3L_DDR_0_DQS_0_P/N
DC1_DQS0 / DQS0B LDQS/~LDQS
K3L_DDR_0_DQS_1_P/N
DC1_DQS1 / DQS1B UDQS/~UDQS
K3L_DDR_0_DQS_2_P/N
DC1_DQS2 / DQS2B LDQS/~LDQS
K3L_DDR_0_DQS_3_P/N
DC1_DQS3 / DQS3B UDQS/~UDQS
Only for training and service purposes.
K3L_DDR_0_DQ [0:15]
DC1_DQ [0:15] DQ[0:15] DQ[0:15]
K3L_DDR_0_DQ [16:31]
DC1_DQ [16:31]
LG Electronics. Inc. All rights reserved.
DCDC LDO FET
MICOM
3.5V ST
4A IR h˅
IC2305
RS-232
FET(Q4101) WiFi Module
L311 SoC(STB3V3_1)
12. K3Lp Power Block
FET(Q203) SoC(STB3V3_2)
L6504 Tuner(+3.5V_ST)
1V WOL
1A SoC(Ethernet)
IC2307
FET(Q202) L300 SoC(USB1V0)
L302 SoC(LV1V0)
L305 SoC(HDRX1V0)
D13.2V
1.5V DDR
- 23 -
3.5A SoC(DDR)
IC2303
DDR3(IC401)
L400
DDR3(IC402)
FET(Q201) L303 SoC(LV1V5_1~2)
Copyright ©
0.75V, 1.5A DDR VTT
IC410
SoC(CPU1V0)
D1V0
10A
IC2302 SoC(C01V0)
PMIC(IC9200)
Only for training and service purposes.
L1100 FET(Q1101) Panel_VCC
SubPMIC(IC9300)
LG Electronics. Inc. All rights reserved.
CI Detect
3.3V NORM
3A HP Amp
IC2300
NVRAM
SPDIF OUT
Pull up
L306 SoC(D3V3,A3V3)
13. K3Lp Power Block2
FET(Q302) SoC(HDRX3V3)
1.8V
2A L2305 SoC(EMMC1V8)
IC2301 EMMC VCCQ
L2304 EMMC VCC
L5801 Audio Amp
L6401 BCAS
D13.2V
Demod
Core Tuner Demod
2A
- 24 -
IC6900
*Japan Only
2.5V
2A Tuner 2.5V
IC6800
L6505 Tuner (+3.3V_TU)
Copyright ©
L6503 Tuner (+3.3V_TU)
L7001 Tuner (LNB)
USB1 OCP
5V NORM
4A USB2 OCP
IC2500
EDID EEPROM
CI OCP & CI IF
Only for training and service purposes.
L6400 BCAS(Japan)
A13.2V Audio Amp
LG Electronics. Inc. All rights reserved.
EXPLODED VIEW
IMPORTANT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These
parts are identified by in the 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.
400
901
800
411
120
521
902
540
LV2
570
530
LV1
500
121
820
200A
200T
700
200
A10
ARC1
AR1
- 25 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
DISASSEMBLY GUIDE
1. Disassemble stand
-rotate and disassemble.
-M4*16 4EA Disassemble screw
- 26 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
2. Disassemble screw
M3*10 13EA
M4*10 2EA
M3*5.5 1EA
-put up the back cover.
3. Disassemble screw
M3*5.5 17EA
- 27 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
4. Disassemble Bottom Cover, and Wifi PCBA
-put up the Bottom cover.
push
-push side and raise up.
5. Disassemble IR
-pushing red point and pull out side.
- 28 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
TROUBLE SHOOTING GUIDE
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Contents of Standard Repair Process
No. Error symptom (High category) Error symptom (Mid category) Page Remarks
1 No video/Normal audio 1
2 No video/No audio 2
3 A. Video error Picture broken/ Freezing 3
4 Color error 4
Vertical/Horizontal bar, residual image,
5 5
light spot, external device color error
6 No power 6
B. Power error Off when on, off while viewing, power
7 7-8
auto on/off
8 No audio/Normal video 9
C. Audio error
9 Wrecked audio/discontinuation/noise 10
10 Remote control & Local switch checking 11
11 MR15 operating checking 12
12 D. Function error Wifi operating checking 13
13 Camera operating checking 14
14 External device recognition error 15
15 E. Noise Circuit noise, mechanical noise 16
16 F. Exterior error Exterior defect 17
First of all, Check whether there is SVC Bulletin in GSCS System for these model.
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process
Established
Error A. Video error date
symptom
No video/ Normal audio Revised date 1/17
First of all, Check whether all of cables between board is inserted properly or not.
(Main B/D↔ Power B/D, LVDS Cable, Speaker Cable, IR B/D Cable,,,)
☞A1 ☞A18
No video Normal Y Check Back Light Y Check Power Replace T-con/Main
On Normal Y
Normal audio audio On with naked eye Board Board or module
voltage
13V
N N
N
Move to No Check Power Board 13V output Repair Power
☞A18
video/No audio Board or parts
Replace Inverter
Normal Y
or module
voltage
N End
Repair Power
Board or parts
※Precaution ☞A4 & A2
Always check & record S/W Version and White
Replace Main Board Re-enter White Balance value
Balance value before replacing the Main Board
1
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process
Established
Error A. Video error date
symptom
No video/ No audio Revised date 2/17
☞A18
No Video/ Check voltage of Check and
Normal Y
No audio Power Board ( 13V…) replace
voltage?
MAIN B/D
N
End
Replace Power
Board and repair
parts
2
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process
Established
Error A. Video error date
symptom
Picture broken/ Freezing Revised date 3/17
. By using Digital signal level meter
☞ A3
. By using Diagnostics menu on OSD
Check RF Signal level ( Advanced→ Channels→ Channel Tuning→ Manual Tuning → Check the Signal )
- Signal strength (Normal : over 50%)
- Signal Quality (Normal: over 50%)
Check whether other equipments have problem or not.
Normal Y
(By connecting RF Cable at other equipment)
Signal?
→ DVD Player ,Set-Top-Box, Different maker TV etc`
N
☞ A4
Check RF Cable
Normal Y Check SVC N Check Y
Connection Close
1. Reconnection Picture? S/W Version Bulletin? Tuner soldering
2. Install Booster N
N Y
S/W Upgrade
Normal N Contact with signal distributor
Picture? or broadcaster (Cable or Air)
Normal N
Y Picture? Replace
Main B/D
Y
Close
Close
3
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process
Established
Error A. Video error date
symptom
Color error Revised date 4/17
☞A6 ☞ A7
※ Check
Check color by input
and replace
-External Input Y
Color Y Link Cable Color Color Y
-COMPONENT Replace Main B/D Replace module
error? (V by one) error? error?
-AV
and contact
-HDMI N
N condition N
Check error End
color input
mode
☞A8 Check
External Input/ External device Y
external
Check Test pattern Component /Cable Replace Main/T-con B/D
device and
error normal
cable
N
Request repair
for external
device/cable
N
HDMI Check external External device Y
error device and /Cable Replace Main/T-con B/D
cable normal
4
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process
A. Video error Established
Error date
symptom Vertical / Horizontal bar, residual image,
light spot, external device color error Revised date 5/17
Vertical/Horizontal bar, residual image, light spot Replace
Module
☞A6
☞ A7 N
Check color condition by input Check external
-External Input Check and
Screen Y device Y Screen N Screen
-Component Normal? replace Link Replace Main/T-con B/D
normal? connection normal? normal?
-HDMI Cable
condition For LGD panel
N N Y Y
Request repair Replace Main B/D
Replace End End
module for external
☞A8 device
For other panel
Check Test pattern
External device screen error-Color error
Check screen
condition by input
-External Input External
Check S/W Version Check N
-Component Input Connect other external
version
-HDMI/DVI error device and cable Screen N Replace
(Check normal operation of normal? Main/T-con
Y
External Input, Component, B/D
Component RGB and HDMI/DVI by Y
S/W Upgrade error connecting Jig, pattern
Generator ,Set-top Box etc.
Request repair for
external device
Y
Connect other external
Normal N HDMI/
device and cable
screen? DVI
(Check normal operation of Screen N Replace
External Input, Component, normal? Main /T-con
Y RGB and HDMI/DVI by B/D
connecting Jig, pattern
Generator ,Set-top Box etc.
End
5
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process
Established
Error B. Power error date
symptom
No power Revised date 6/17
☞A17 ☞A18
DC Power on Replace
Check Power LED Y Normal N Check Power Y
by pressing Power Key OK? Power
Logo LED On? operation? On ‘”High”
On Remote control B/D
. Stand-By: Red or Turn On
N Y
. Operating: Turn Off
Check Power cord Replace Main B/D
was inserted properly
☞A18
Measure voltage of each output of Power B/D
N
Normal?
Y
Y Y
Normal Replace Main B/D
voltage?
Close Normal
Check ST-BY 3.5V
Y
voltage? N
☞A18 Replace Power B/D
N
Replace Power
B/D
6
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process
Established
Error B. Power error date
symptom
Off when on, off while viewing, power auto on/off Revised date 7/17
Check outlet
☞A19
N Y
Check A/C cord Error? Check Power Off CPU
Replace Main B/D Normal? End
Mode Abnormal
Y N
Check for all 3- phase
power out Abnormal Replace Power B/D
1
Fix A/C cord & Outlet ☞A18
and check each 3
(If Power Off mode
phase out
is not displayed) Normal Y
Replace Main B/D
Check Power B/D voltage?
voltage
N
※ Caution
Check and fix exterior Replace Power B/D
of Power B/D Part
7
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process
Established
Error B. Power error date
symptom
Off when on, off while viewing, power auto on/off Revised date 8/17
* Please refer to the all cases which can be displayed on power off mode.
Power Off list Explanation Action contents
Power off when TV is not turned off during a certain time
KEYTIMEOUT RESULT : micom force to trigger TV power off. Check & Change Main B/D
CONDITION : When pressing power key while power on/off status, CPU does not response within 8 seconds
Almost the same as Power Off by KEYTIMEOUT. If there is no vaild communication
Bet ween CPU and MICOM for more than 5 seconds, the MICOM switcheds off PSU and
1SEC Power OFF Check & Change Main B/D
Records. Power off by 1SEC Power off. In this case, we don’t have information where the
malfunction exactly occurred. But in in indicates that CPU had stopped and rebooted.
In case of AC Off (It is normal when the power cord is unplugged.) Normal
ACDET
If there are many ACDETs connected, Power Board is defective Check & Change Power B/D
Power off by unstable AC power detect.
RESULT : micom check the stable power.
5V MNT Check & Change Power B/D
CONDITION : When AC on or DC on, stabilization check routine (Power Detect High
Check) fail after multi power on.
CPUABNORMAL If the CPU attempts to reset in case of abnormal operation and Shut Down in case of failure. Check & Change Main B/D
Power off when receiving no ack.
NO POLING RESULT : TV power off/on (Reboot) Check & Change Main B/D
CONDITION : There is no I2C response from CPU for 15 seconds.
CPUCMD Power off by main SoC command. Check & Change Main B/D
Power off by module error (OLED)
INV_ERROR Check & Change OLED Module
CONDITION : OLED Module send signal to micom
ONRF_FAIL RESULT : Reboot, CONDITION : OLED module compensation is running but fails. Check & Change OLED Module
PNWASHFAIL Power off by panel noise wash function fail case. Check & Change OLED Module
RESET When Micom is reset by AC Off
KEY Power off by Local key
OFFTIMER Power off by Off timer
SLEEPTIMER Power off by sleep timer
NOSIG Power off by No Signal
FANSTOP Power off by FAN operation stopped
INSTOP Power off by Instop Key
Normal Case
AUTO OFF Power off by auto off function
RESREC Power off by reserved recording
RECEND Power off when recording stops
SWDOWN Reboot by SW down load function
UNKNOWN No meaning (same as initial value)
COMP_END OLED threshold voltage degradation(Compensation) completes.
PNWASHDONE Power off by panel noise wash function complited. (OLED)
8
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process
Established
Error C. Audio error date
symptom
No audio/ Normal video Revised date 9/17
☞A20 ☞A21+A18
No audio
Check user
N
Check audio B+
Normal Y
menu > Off 13V of Power
Screen normal voltage
Speaker off Board
Y N
Cancel OFF Replace Power Board and repair parts
Check N
Disconnection Replace MAIN Board End
Speaker
disconnection
Y
Replace Speaker
9
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process
Established
Error C. Audio error date
symptom
Wrecked audio/ discontinuation/noise Revised date 10/17
→ abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio
Wrecked audio/
☞A21+A18
Check and replace
Discontinuation/ Check audio
speaker and
Noise for B+ Voltage (13V)
connector
Check input all audio
signal
Signal Y
-RF
normal? Wrecked audio/ Y
-External Input Normal
signal Discontinuation/
Replace Main B/D voltage?
Noise only
N for D-TV
N
Wrecked audio/
Discontinuation/
Replace Power B/D
Noise only
for Analog
(When RF signal is not
received)
Request repair to external Wrecked audio/ Replace Main B/D End
cable/ANT provider Discontinuation/
Noise only
for External Input
(In case of
External Input Connect and check Normal N
signal error) other external audio?
Check and fix device
external device Y
Check and fix external device
10
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process
D. Function error Established
Error date
symptom
Remote control & Local switch checking Revised date 11/17
1. Remote control(R/C) operating error Replace
Main B/D
☞A22 ☞A22 ☞A22
Check & Repair Check B+ Y
Check R/C itself Normal Y Normal N Normal Y Check IR Normal
operating? Cable connection operating? 3.5V Voltage? Signal?
Operation Output signal
Connector solder On Main B/D
N Y N N
☞A18
Check R/C Operating Check & Replace Close Check 3.5v on Power B/D Repair/Replace
When turn off light Baterry of R/C Replace Power B/D or IR B/D
in room Replace Main B/D
(Power B/D don’t have problem)
If R/C operate, Normal Y
operating? Close
Explain the customer
cause is interference
from light in room. N
Replace R/C
11
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process
D. Function error Established
Error date
symptom
MR15 operating checking Revised date 12/17
2. MR15 (Magic Remocon) operating error
☞A4
Check the RF Receiver ver N Check MR15 Normal Y Press the Is show ok N Turn off/on the
INSTART menu is “00.00”? itself Operation operating? wheel message? set and press
the wheel
N Y
Y
☞A23
Check & Replace Close
Check & Repair Battery of MR15
RF assy
connection
Normal Y
☞A4 operating? Close
Is show ok N Press the back
RF Receiver ver N N message? key about 5sec
is “00.00”? Close
Y
Replace
Y MR15
Close
Down load the Firmware
• If you conduct the loop at 3times,
* INSTART MENU14.RF change the MR15
Remocon Test3. Firmware
download
12
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process
D. Function error Established
Error date
symptom
Wifi operating checking Revised date 13/17
3.Wifi operating error
☞A4 ☞A24
Check the Wi-Fi Mac value N Check the Wifi wafer Normal N Replace
INSTART menu is “NG”? 1pin Voltage? Main B/D
Y
Y
☞A24
Close
Check & Repair
Wifi cable
connection
☞A4
Wi-Fi Mac value N
is “NG”? Close
Y
Change the Wifi
assy
13
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process
D. Function error Established
Error date
symptom
Camera operating checking Revised date 14/17
4.Camera operating error
☞A4 ☞A25
Check the Camera Ver. N Reconnect the Normal N Replace
INSTART menu is “NULL”? Camera module operation? Main B/D
Y
Y
Close
Change the
Camera module
14
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process
Established
Error D. Function error date
symptom
External device recognition error Revised date 15/17
Check technical
Check Y External Input and
Signal information Technical N
input Component Replace Main B/D
input? - Fix information information?
Recognition error
signal
- S/W Version
N Y
HDMI/
Check and fix DVI, Optical
Fix in Replace Main B/D
external device/cable Recognition error
accordance
with technical
information
15
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process
Established
Error E. Noise date
symptom
Circuit noise, mechanical noise Revised date 16/17
Identify Check
Circuit
nose location of Replace PSU
noise
type noise
Mechanical Check location of
noise noise
※ When the nose is severe, replace the module
※ Mechanical noise is a natural (For models with fix information, upgrade the
phenomenon, and apply the 1st level S/W or provide the description)
description. When the customer does not OR
agree, apply the process by stage. ※ If there is a “Tak Tak” noise from the
※ Describe the basis of the description cabinet, refer to the KMS fix information and
in “Part related to nose” in the Owner’s then proceed as shown in the solution manual
Manual. (For models without any fix information,
provide the description)
16
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process
Established
Error F. Exterior defect date
symptom
Exterior defect Revised date 17/17
Zoom part with Module
Replace module
exterior damage damage
Cabinet
Replace cabinet
damage
Remote
control Replace remote control
damage
Stand
Replace stand
dent
17
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Contents of Standard Repair Process Detail Technical Manual
No. Error symptom Content Page Remarks
1 A. Video error_ No video/Normal Check LCD back light with naked eye A1
2 audio Check White Balance value A2
TUNER input signal strength checking
3 A3
method
A. Video error_ video error /Video
4 lag/stop Version checking method A4
5 Tuner Checking Part A5
A. Video error _Vertical/Horizontal bar,
6 Connection diagram A6
residual image, light spot
Check Link Cable (EPI) reconnection
7 A. Video error_ Color error A7
condition
A-1/11
8 Check Cable(1) ~ (2)
A-2/11
A-3/11 ~
9 Exchange Main Board (1) ~ (3)
A-5/11
Defected Type caused by T-Con/ A-6/11 ~
10 Exchange Module (1) ~ (3)
Inverter/ Module A-8/11
A-9/11 ~
11 Exchange T-Con (1) ~ (2)
A-10/11
12 Exchange Power Board (PSU) A-11/11
Continue to the next page
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Contents of Standard Repair Process Detail Technical Manual
Continued from previous page
No. Error symptom Content Page Remarks
13 Check front display LED A17
B. Power error_ No power
14 Check power input Voltage & ST-BY 3.5V A18
B. Power error_Off when on, off
15 POWER OFF MODE checking method A19
while viewing
Checking method in menu when there is no
16 A20
C. Audio error_ No audio/Normal audio
video Voltage and speaker checking method when
17 A21
there is no audio
18 D. Function error Remote control operation checking method A22
19 How to use the Service remote control A23-A25
20 Check items after Main B/D replacement A26
E. Etc
21 Adjustment Test pattern - ADJ Key A27
How to use JIG
22 A28
(Power B/D Diganostic Smart Jig Multi Gender)
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process Detail Technical Manual
Error Established
symptom A. Video error_No video/Normal audio date
Revised
Content Check LCD back light with naked eye date A1
After turning on the power and disassembling the case, check with the naked eye,
whether you can see light from locations.
A1
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process Detail Technical Manual
Error Established
symptom A. Video error_No video/Normal audio date
Revised
Content Check White Balance value date A2
Entry method
1. Press the ADJ button on the remote controller for adjustment.
2. Enter into White Balance of item 13.
3. After recording the R, G, B (GAIN, Cut) value of Color Temp
(Cool/Medium/Warm), re-enter the value after replacing the MAIN BOARD.
A2
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process Detail Technical Manual
Error Established
symptom A. Video error_Video error, video lag/stop date
Revised
Content TUNER input signal strength checking method A3
date
Advanced Channels Channel Tuning
Manual Tuning
When the signal is strong,
use the attenuator (-10dB, -
15dB, -20dB etc.)
A3
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process Detail Technical Manual
Error Established
symptom A. Video error_Video error, video lag/stop date
Revised
Content Version checking method date A4
1. Checking method for remote control for adjustment
Version
v
v
Press the IN-START with the remote
control for adjustment
A4
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process Detail Technical Manual
Error Established
symptom
A. Video error_Video error, video lag/stop
date
Revised
Content TUNER checking part date A5
Checking method:
1. Check the signal strength or check whether the screen is normal when the external device is connected.
2. After measuring each voltage from power supply, finally replace the MAIN BOARD.
3. If you can`t see the UHD live TV, please connect signal at left side of jack. (Korea model only)
A5
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process Detail Technical Manual
Error A. Video error _Vertical/Horizontal bar, Established
symptom residual image, light spot date
Revised
Content Connection diagram (1) date A6
As the part connecting to the external input, check
the screen condition by signal
A6
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process Detail Technical Manual
Error Established
symptom A. Video error_Color error date
Revised
Content Check Link Cable(FFC) reconnection condition date A7
Check the contact condition of the Link Cable, especially dust or mis insertion.
A7
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Appendix. Examples of Symptoms(Image error) Check for poor cable contact
Symptom
Item Cause Symptom Image
Name
Pin 단선
CABLE Color smear Poor broken pin of FFC cable
Color is Excessive due to FFC Cable
CABLE R Color Excessive
Contact.
screen is dark due to poor contact due
CABLE Screen darkness to disconnection of the FFC cable pin.
G color transient due to poor FFC cable
CABLE G Color Excessive connection
A - 1/11
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Appendix. Examples of Symptoms(Image error) Check for poor cable contact
Symptom
Item Cause Symptom Image
Name
CABLE Color spread LVDS cable connection problem
CABLE Color spread LVDS cable connection problem
CABLE Color spread LVDS cable connection problem
Due to foreign substance withi nLVDS
CABLE Screen stop cable PIN
A - 2/11
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Appendix. Examples of Symptoms(Main) Check parts by symptom
Symptom
Item Cause Symptom Image
Name
Main Screen noise Bit noise from horizontal screen
Broken screen due to
Main Screen noise
Main IC problem
Main Dark picture Dark left-side screen
Top/bottom screen part
Main Broken picture
Picture problem due to tuner
Inner side quality problem
A - 3/11
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Appendix. Examples of Symptoms(Main) Check parts by symptom
Symptom
Item Cause Symptom Image
Name
Main Broken screen Broken screen in a horizontal manner
Main Screen spread Screen corner appears blurry
Main Color Spread Color spread on the screen
Main Blurry Screen Blurry picture on the screen
A - 4/11
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Appendix. Examples of Symptoms(Main) Check parts by symptom
Symptom
Item Cause Symptom Image
Name
No problem at the initial stage,
Main Broken picture G-color spread after 10 minutes
Right-side
Main
Screen Right-side screen problem
problem
LG logo
Main Screen picture spread problem
Screen problem
No problem at the initial stage.
Right-side
Main During Heat run, right-side picture
picture problem
problem
A - 5/11
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Appendix. Examples of Symptoms(Module) Check parts by symptom
Symptom
Item Cause Symptom Image
Name
Isometric Isometric horizontal bars occur
MODULE
Horizontal Bar throughout the screen
MODULE Internal matter BLU internal foreign matter inflow
MODULE Image broken 6 block image broken
MODULE Image broken Screen sync signal broken
A - 6/11
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Appendix. Examples of Symptoms(Module) Check parts by symptom
Symptom
Item Cause Symptom Image
Name
Internal damage and image breakage
MODULE Image broken
due to external impact
Bend on the Bending due to lateral external impact
MODULE
screen and internal bending of BLU
Vertical spreading on cube screen in no
MODULE Vertical smear
signal
MODULE Over color Screen contour part brightly Over color
A - 7/11
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Appendix. Examples of Symptoms(Module) Check parts by symptom
Symptom
Item Cause Symptom Image
Name
MODULE Vertical bar Center Vertical Bar
MODULE Screen darkness Center of the screen 1 block dark
MODULE Vertical bar Center Vertical Bar
Darkness at the
MODULE bottom of the MODULE internal BLU breakage
screen
A - 8/11
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Appendix. Examples of Symptoms(T-Con) Check parts by symptom
Symptom
Item Cause Symptom Image
Name
screen lower T-Con is defective and the picture below
T-CON
image broken the screen is broken
screen lower T-Con is defective and the picture below
T-CON
image broken the screen is broken
screen lower T-Con is defective and the picture below
T-CON
image broken the screen is broken
screen lower T-Con is defective and the picture below
T-CON
image broken the screen is broken
A - 9/11
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Appendix. Examples of Symptoms(T-Con) Check parts by symptom
Symptom
Item Cause Symptom Image
Name
T-CON Wafer Locking The strength is
T-CON Image Broken
weak and cable contact failure occurs
Darkness at the Initial normal operation,
T-CON
top of the screen upper darkness during heat run
The entire screen is dark and bit noise
T-CON Image Broken
occurs
The entire screen is dark and bit noise
T-CON Image Broken
occurs
A - 10/11
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Appendix : Exchange Power Board (PSU)
No Light No picture/Sound Ok
A - 11/11
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process Detail Technical Manual
Error Established
symptom B. Power error _No power date
Revised
Content Check front Power Indicator date A17
A17
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process Detail Technical Manual
Error Established
symptom
B. Power error _No power
date
Revised
Content Check power input voltage and ST-BY 3.5V A18
date
Backlight Values Backlight
Forward Symbol Unit Values
Min Typ Max Forward Symbol Unit
Voltage
Voltage Min Typ Max
65UJ65 117.18 130.2 143.22
60UJ65 111.87 124.3 136.73 65UJ63 - 192 216
60UJ63 - 175 195
55UJ65 99.4 106.6 113.8
VF Vdc
55UJ63 VF - 130.4 141.2 Vdc
49UJ65 - 85.05 91.8
49UJ63 - 111.6 118.8
43UJ65 - 65.94 71.4 43UJ63 - 65.94 71.4
Check the DC 13V
A18
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process Detail Technical Manual
Error
symptom B. Power error _Off when on, off whiling viewing Established
date
Revised
Content POWER OFF MODE checking method date A19
Entry method
1. Press the IN-START button of the remote control for adjustment
2. Check the entry into adjustment item 3
A19
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process Detail Technical Manual
Error Established
symptom C. Audio error_No audio/Normal video
date
Revised
Content Checking method in menu when there is no audio date A20
Checking method
1. Press the Setting button on the remote control
2. Select the Sound function of the Menu
3. Select the Sound Out
4. Select TV Speaker
A20
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process Detail Technical Manual
Error Established
symptom C. Audio error_No audio/Normal video date
Voltage and speaker checking method Revised
Content date A21
when there is no audio
UJ7*
1 VSYNC 2 SIN
3 GND 4 SCLK
5 DRV_ON 6 PDIM1
7 GND 8 GND
9 A13 10 A13
11 D13 12 D13
② 13 GND 14 D13
15 PWR_ON 16 PDIM2
17 GND 18 GND ①
UJ6*
1 DRV_ON 2 PDIM1
3 GND 4 GND
5 A13 6 A13
7 D13 8 D13
③
9 GND 10 D13
11 PWR_ON 12 PDIM2 1 SPK_R-
2 SPK_R+
Checking order when there is no audio 3 SPK_L-
4 SPK_L+
1.Check the contact condition of or 13V connector of Main Board
2. Measure the 13V input voltage supplied from Power Board
(If there is no input voltage, remove and check the connector)
3.Connect the tester RX1 to the speaker terminal and if you hear the Chik Chik sound when you touch the
GND and output terminal, the speaker is normal.
A21
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process Detail Technical Manual
Error Established
symptom
D. Function error
date
Revised
Content Remote control operation checking method date A22
1 +3.5V
IR & LOGO light Front 2 WIFI_DM
3 WIFI_DP
4 GND
5 WOL_ON
6 3.5V
7 COMBO_RESET
8 GND
IR & LOGO light Rear 9 COMBO_WAKEUP_DEVICE
10 COMBO_WAKEUP_HOST
11 GND
12 GND
13 NC
14 NC
15 NC
③ 16 EYE_SDA
17 EYE_SCL
18 GND
②
Eye LED IR 19 IR
Checking order to check remote control 20 LED
21 GND
Checking order 22 3.5V
23 KEY2
1.Check IR cable condition between IR & Main board.( Check picture number① and ②)
2.Check the standby 3.5V on the terminal 22 pin (③) 24 KEY1
3.AS checking the Pre-Amp(IR LED light) , the power is in ON condition, an Analog Tester 25 GND
needle should move slowly, otherwise, it’s defective.
A22
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process Detail Technical Manual
Error Established
symptom
D. Function error
date
Revised
Content Remote control operation checking method date A22
1 +3.5V
2 WIFI_DM
① Wifi & BT Front 3 WIFI_DP
4 GND
5 WOL_ON
6 3.5V
7 COMBO_RESET
8 GND
9 COMBO_WAKEUP_DEVICE
10 COMBO_WAKEUP_HOST
Wifi & BT Rear 11 GND
12 GND
13 NC
14 NC
15 NC
③ 16 EYE_SDA
17 EYE_SCL
18 GND
②
19 IR
20 LED
Checking order to check motion remote/wifi 21 GND
Checking order 22 3.5V
23 KEY2
1.Check BT/Wifi cable condition between BT/Wifi assy & Main board.
2.Check the 3.5V on the terminal 1 24 KEY1
25 GND
A22
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process Detail Technical Manual
Error Established
symptom
D. Function error
date
Revised
Content How to use the Service remote control A23
date
1. How to access the remote control
0 4 1 3
0 4 1 3
A23
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process Detail Technical Manual
Error Established
symptom
D. Function error
date
Revised
Content How to use the Service remote control date A24
2. Remote control part definition
POWER Power On/Off
[ETC] Each time pressing the KEY button, Mode gets changed to ETC and P-ONLY each time
ETC (Added Function) All KEY function [PIP PR-][PIP PR+][SWAP]
[PIP INPUT][DVI] KEY Function
P-ONLY (Added Changed to factory mode
Function) All KEY function &[INFO][STILL][HDMI HOT][USB HOT][HDMI4] KEY Action
INPUT Change to the external device mode
Change in the order of 16:9=>Zoom1=>Zoom2=>Cinema Zoom=>Aucto
ARC
Screen=>4:3=>16:9
Changes in the order of Bright Picture=>Easy Picture=>Cinema=>Spots=>Game=>
PSM
Custom PIcture1=>Custom Picture2=>Bright Picture
SSM (Added Function) Standard(user)=>music=>cinema=>sports=>game=>standard(user)
PIP Picture In Picture is activated
TEXT Access to the Power Only mode
CAP Broadcasting caption(on/off)
MPX Stereo mode (mono, stereo, foreign language) access
Used when in factory mode
Simplink (Added
Access to the Simplink-connected device
Function)
Digital EYE function ON/OFF
EYE
For some Model, access to the Test Pattern
TILT Used for screen tilting change (Access to the old PDP control mode)
A24
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process Detail Technical Manual
Error Established
symptom D. Function error date
Revised
Content How to use the Service remote control A25
date
B-TOOTH
Connected to Blue-Tooth
(Added function)
Model Nam ex) 42PG60D-NA Current Model Name S/W Version ex)
IN-START V03.11.0 Current S/W version
MICOM Version ex) V3.05.0 current Mi-Com version UTT ex) User TV total usage time
POWER OFF STATUS ex) Shows power-off status
ADJ
Test Pattern (Off=>White=>Red=>Green=>Blue=>Black=>Pattern=>Off) Change
X-STUDIO (Added
HDD,USB, external device’s HDD screen is activated
function)
MENU User function gets activated
EXIT Exit from the current mode
TIME SHIFT (Added
Moves forward/backward of recorded contents
function)
MUTE Mute function (0 Volume)
IN-STOP SET to factory mode
VOL + - Volume Up/Down
CH + - Channel Up/Down
AV1,2,3 (Added function) Connects to external input 1,2,3
COMP1,2 (Added
Connects to Component 1,2
function)
HDMI1,2,3,4
Connects to HDMI 1,2,3,4
(Add function)
DVI (Add function) Connects to DVI
A25
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process Detail Technical Manual
Error D. Function error Established
symptom date
Revised
Content Check items after Main B/D replacement A26
date
Check items afer Main B/D(Model Number D/L, White Balance)
1. Press the Service remote control instart Key.
No.7 Select Model Number D/L
- Key in the model name and serial number
after checking the ID label on the back cover.
2. Press the Service remote control ADJ Key.
No.13 Select White Balance
- Record the R, G, B (GAIN, Cut) value of the
color temperature before main board
replacement.
A14 After replacing the main board, key in the
recorded value.
A26
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process Detail Technical Manual
Error Established
symptom
A. Video error_Color error
date
Revised
Content Adjustment Test pattern date A27
1
2
3
Press the P-ONLY HDMI HOT CH + or -
You can view 11 types of patterns using the CH+ or - key
Checking item : 1. Defective pixel 2. Residual image 3. MODULE error (ADD-BAR,SCAN BAR..)
4.Video error (Classification of MODULE or Main-B/D!)
A27
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Smart JIG Power Diagnosis
Muitl Gender Guide
(P/N : RAD32507801) (P/N : RAD33187801)
A 28 (1/19)
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Power Board Muitl Gender JIG Diagram (P/N: RAD33187801)
15Y 15Y
(LF/UF Series) (OLED)
※ 12/13/14Y Smart JIG
connector applied 28Pin 24Pin 24Pin 24Pin NC
24Pin
18Pin 16Y
(OLED)
24Pin
13Y/14Y 28Pin
17Y
(OLED)
24Pin 12Y
28Pin
16Y/17Y
18Pin (UH/UJ)
12Pin 12Pin 28Pin 28Pin
28Pin
Includes 49UJ63
17Y 16Y 16Y/17Y 16Y/17Y 16Y
(SJ/UJ) (UH) (UH/SJ) (UH) A 28 (2/19)
(LH/LJ) Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Power Board Muitl Gender JIG Diagnostic model List
Existing 12Y, 13Y, 14Y, 15Y LED models included
15Y, 16Y, 17Y OLED, 16/17 Y LED model Power diagnosis function newly added
<15Y/16Y/17Y OLED Model, 16Y/17Y LED Model>
Year Product Model
EG92/EG93/EG94
‘15 OLED EG96
EF95
B6
C6
OLED
E6
G6
‘16 UH95/UH96
UH85/UH93
UH77/UH87
LED
UH75/UH76
UH65/UH68
LH68, LH66, LH60,LH54
B7
C7
‘17 OLED E7
G7
W7
SJ95/UJ98
SJ85/UJ94
SJ80, UJ77
UJ75/UJ78
’17 LED
UJ65/UJ68
UJ63/UJ67
LJ61/LJ68
LJ55/LJ58
A 28 (3/19)
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Power Board Muitl Gender How to Connect
1
▶ Power Board Muitl Gender JIG
2
“A:2013 LCD POWER”
2014
▶ Connect the Muiti Gender to the connector (black)
as shown in picture 2 of the Smart JIG.
A 28 (4/19)
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Smart Jig Voltage Setting
1 2
▶ Switch the product S/W in JIG to LCD.
▶ LCD MODEL Check the power voltage
▶ Check power board voltage. and switch to the correct voltage.
※ Note on set up
(The correct power diagnosis can be made only if it is set correctly.)
- 24V Power Board : Change the switch to 24V of Smart Jig Voltage
- 20V Power Board : Change the switch to 24V of Smart Jig Voltage
- 13.2V/18V Power Board : Change the switch to 24V of Smart Jig Voltage
Power B/D Smart Jig Voltage Switch
24V 24V
20V 20V
13.2V/18V 24V
A 28 (5/19)
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
`15Y OLED(EG96,EF95,EG92,EG93,EG94) Power Board Diagnostic method (1)
1 2
▶ Switch the product S/W in JIG to LCD.
▶ LCD MODEL Check the power voltage
and switch(24V) to the correct voltage.
▶ Check power board voltage. ▶ Fix the LCD MODEL switch to 24V.(Smart JIG)
3 4
▶ Disconnect the Main Board 24Pin Power Cable connector. ▶ Connect the 24Pin Power Cable connector to the Muitl
Gender JIG 24Pin connector
A 28 (6/19)
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
`15Y OLED(EG96,EF95,EG92,EG93,EG94) Power Board Diagnostic method (2)
5 6
▶ When the OK LED(24V,12V) turns on, Power Board is normal.
▶ When the NG LED turns on, the Power Board
can be judged as defective.
A 28 (7/19)
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
`16Y OLED(B6) Power Board Diagnostic method
1 2
▶ Switch the LCD MODEL S/W to 24V by checking
the power voltage.
▶ Fix the LCD MODEL switch to 24V.(Smart JIG)
▶ Connect the 24Pin Power Cable connector
to the Multi gender JIG 24Pin connector.
3
▶ When the OK LED(24V,12V) turns on, Power Board is normal.
▶ When the NG LED turns on, the Power Board
can be judged as defective.
A 28 (8/19)
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
`16Y OLED(C6) Power Board Diagnostic method
1 2
▶ Check power board voltage. ▶ Disconnect the Main Board 24Pin Power Cable connector.
▶ Smart JIG: Fix the LCD MODEL switch to 24V.(Smart JIG)
3 4
▶ Connect the 24Pin Power Cable connector ▶ When the OK LED(24V,12V) turns on, Power Board is normal.
to the Muitl Gender JIG 24Pin connector
A 28 (9/19)
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
`16Y OLED(E6) Power Board Diagnostic method
1 2
▶ Check power board voltage. ▶ Disconnect the Main Board 24Pin Power Cable connector.
▶ Fix the LCD MODEL switch to 24V.(Smart JIG)
3 4
▶ Connect the 24Pin Power Cable connector ▶ When the OK LED(24V,12V) turns on, Power Board is normal.
to the Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board
A 28 (10/19) can be judged as defective.
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
`16Y OLED(G6) Power Board Diagnostic method
1 2
▶ Check power board voltage. ▶ Disconnect the Main Board 24Pin Power Cable connector.
▶ Fix the LCD MODEL switch to 24V.(Smart JIG)
3 4
▶ Connect the 24Pin Power Cable connector ▶ When the OK LED(24V,12V) turns on, Power Board is normal.
to the Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board
A 28 (11/19) can be judged as defective.
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
`17Y OLED(B7/C7/E7/G7) Power Board Diagnostic method
1 2
▶ Disconnect the Main Board 28Pin Power Cable connector. ▶ Connect the 28Pin Power Cable connector
to the Muitl Gender JIG 28Pin connector
3 4
▶ Switch the LCD MODEL S/W to 20V by checking ▶ When the OK LED(24V,12V) turns on, Power Board is normal.
the power voltage.
▶ When the NG LED turns on, the Power Board
▶ Fix the LCD MODEL switch to 20V.(Smart JIG) A 28 (12/19) can be judged as defective.
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
`17Y OLED(W7) Power Board Diagnostic method
1 2
▶ Disconnect the Main Board 24Pin Power Cable connector. ▶ Connect the 24Pin Power Cable connector
to the Muitl Gender JIG 28Pin connector
3 4
▶ Switch the LCD MODEL S/W to 20V by checking ▶ When the OK LED(24V,12V) turns on, Power Board is normal.
the power voltage.
▶ When the NG LED turns on, the Power Board
▶ Fix the LCD MODEL switch to 20V.(Smart JIG) A 28 (13/19) can be judged as defective.
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
`16Y/`17Y LED 18Pin Power Board Diagnostic method
1 2
▶ Check power board voltage.
▶ Disconnect the Main Board 18Pin Power Cable connector.
▶ Fix the LCD MODEL switch to 24V.(Smart JIG)
3 4
▶ Connect the 18Pin Power Cable connector ▶ When the OK LED(24V,12V) turns on, Power Board is normal.
to the Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board
A 28 (14/19) can be judged as defective.
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
`16Y LED(UH95/UH96) Power Board Diagnostic method
1 2
▶ Check power board voltage. ▶ Disconnect the Main Board 28Pin Power Cable connector.
▶ Fix the LCD MODEL switch to 24V.(Smart JIG)
3 4
▶ Connect the 28Pin Power Cable connector ▶ When the OK(24V,12V) LED turns on, Power Board is normal.
to the Muitl Gender JIG 28Pin connector ▶ When the NG LED turns on, the Power Board
A 28 (15/19) can be judged as defective.
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
`16Y/`17Y LED(UH85/UH93) Power Board Diagnostic method
1 2
▶ Check power board voltage. ▶ Disconnect the Main Board 28Pin Power Cable connector.
▶ Fix the LCD MODEL switch to 24V.(Smart JIG)
3 4
▶ Connect the 28Pin Power Cable connector ▶ When the OK LED(24V,12V) turns on, Power Board is normal.
to the Muitl Gender JIG 28Pin connector ▶ When the NG LED turns on, the Power Board
A 28 (16/19) can be judged as defective.
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
`16Y/`17Y LED 12Pin Power Board Diagnostic method
1 2
▶ Check power board voltage.
▶ Disconnect the Main Board 12Pin Power Cable connector.
▶ Fix the LCD MODEL switch to 24V.(Smart JIG)
3 4
▶ Connect the 12Pin Power Cable connector ▶ When the OK LED(24V,12V) turns on, Power Board is normal.
to the Muitl Gender JIG 12Pin connector ▶ When the NG LED turns on, the Power Board
A 28 (17/19) can be judged as defective.
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
`16Y LED 12Pin Power Board Diagnostic method
1 2
▶ Check power board voltage.
▶ Disconnect the Main Board 12Pin Power Cable connector.
▶ Fix the LCD MODEL switch to 24V.(Smart JIG)
3 4
▶ Connect the 12Pin Power Cable connector ▶ When the OK LED(24V,12V) turns on, Power Board is normal.
to the Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board
A 28 (18/19) can be judged as defective.
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
`17Y LED 28Pin Power Board Diagnostic method
1 2
▶ Check power board voltage.
▶ Disconnect the Main Board 28Pin Power Cable connector.
▶ Fix the LCD MODEL switch to 20V.(Smart JIG)
3 4
▶ Connect the 28Pin Power Cable connector ▶ When the OK LED(24V,12V) turns on, Power Board is normal.
to the Muitl Gender JIG 28Pin connector ▶ When the NG LED turns on, the Power Board
A 28 (19/19) can be judged as defective.
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
