CONFIDENTIAL
OLED TV
SERVICE MANUAL
CHASSIS : ED71H
MODEL : OLED77G7V OLED77G7V-Z
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL69867402 (1707-REV01)
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 .............................................................................. 10
BLOCK DIAGRAM.................................................................................... 11
EXPLODED VIEW ................................................................................... 19
ASSEMBLY / DISASSEMBLY GUIDE....................................... APPENDIX
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 OLED TV with ED71H (1) Performance: LGE TV test method followed
chassis. (2) Demanded other specification
- Safety : CE, IEC specification
- EMC : CE, IEC specification
- Wireless : Wireless HD Specification (Option)
2. Requirement for Test
Each part is tested as below without special appointment.
(1) Temperature: 25 °C ± 5 °C(77 °F ± 9 °F), CST: 40 °C ± 5 °C
(2) Relative Humidity: 65 % ± 10 %
(3) Power Voltage
: Standard input voltage (AC 100~240 V, 50/60 Hz)
* Standard Voltage of each products is marked by models.
(4) Specification and performance of each parts are followed
each drawing and specification by part number in
accordance with BOM.
(5) The receiver must be operated for about 20 minutes prior
to the adjustment.
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,
Romania, Albania, Bosnia, Serbia, Slovakia, Belarus, UK, Sweden, Den-
mark, Finland, Norway, Ukraine, Kazakhstan
EU(PAL Market-36Countries)/CIS
1 Market
+ Morocoo(Africa)
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, ATLAN-
TIC 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 7.3WEUTELSAT 16.0E,
EXPRESS AM1 40.0E, EXPRESS AM3 140.0E, EXPRESS AM33 96.5E,
HELLASSAT 39.0E, HISPASAT 1CDE 30.0WHOTBIRD 13.0E, INTEL-
SAT10&7 68.5E, INTELSAT15 85.2E, INTELSAT1R 50.0W, INTEL-
SAT903 33.5W, INTELSAT904 60.0E, NILESAT 7.0W, NSS12 57.0E,
THOR 0.8W, TURKSAT 42.0E, YAMAL201 90.0E, OTHER
-6- Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
No. Item Specification Remarks
(1) Digital TV
- DVB-T
- DVB-T2*
- DVB-C
2 Broadcasting system *:Depending on country
- DVB-S/S2*
(2) Analogue TV
- PAL/SECAM B/G/I/D/K
- SECAM L
(1) Digital TV
1) DVB-T/T2
- VHF III : 174~230MHz
- UHF IV : 470~606MHz
- UHF V : 606~862MHz
- S Band II : 230~300MHz
3 Channel coverage - S Band III : 300~470MHz * Only DVB-T2/C/S2 support model only.
2) DVB-C
- 46 ~ 890MHz
3) DVB-S/S2
- 950~2150MHz
(2) Analogue TV
- 46~862MHz
► 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 (Model : *L*V*-Z* (T2 only Model)
- 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
Analog : Upper Heterodyne 16-QAM : 1/2, 2/5, 2/3, 3/4, 5/6
4 Receiving system
Digital : COFDM, QAM 64-QAM : 1/2, 2/5, 2/3, 3/4, 5/6
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
- viterbi
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
Antenna,
5 Head phone out HDMI1, HDMI2, HDMI3, HDMI4 USB1, USB2,
USB3
HDMI1-DTV
6 HDMI Input (3EA) HDMI2-DTV
HDMI3-DTV
7 SPDIF out (1EA) SPDIF out
8 USB (3EA) EMF, For SVC (download) JPEG, MP3
9 Ethernet Connect (1EA) Ethernet Connect STP cable
10 PCMCIA Card slot (1EA) PCMCIA slot
-7- Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
5. External Input Format
5.1. HDMI : EDID DATA : Refer to adjust specification.
5.1.1. DTV mode
No Resolution H-freq (kHz) V-freq (Hz) Pixel clock (MHz) Proposed Remarks
1 640*480 31.469 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, DVD 480I(525I)
4 720*480 15.75 60.00 13.514 SDTV, DVD 480I(525I)
Spec. out but display
SDTV, DVD 576I(625I)
5 720*576 15.625 50.00 13.500
50Hz
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
9 1280*720 44.96 59.94 74.176 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 28.125 50.00 74.25 HDTV 1080I
13 1920*1080 33.72 59.94 74.176 HDTV 1080I
14 1920*1080 33.75 60.00 74.25 HDTV 1080I
15 1920*1080 26.97 23.976 63.296 HDTV 1080P
16 1920*1080 27.00 24.000 63.36 HDTV 1080P
17 1920*1080 33.71 29.97 79.120 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 67.432 59.94 148.350 HDTV 1080P
21 1920*1080 67.50 60.00 148.50 HDTV 1080P
22 1920*1080 135.00 120.00 297.00 HDTV 1080P
23 1920*1080 135.00 119.88 296.70 HDTV 1080P
24 1920*1080 112.50 100.00 297.00 HDTV 1080P
25 1920*1080 135.00 120.00 297.00 HDTV 1080P
26 1920*1080 135.00 119.88 296.70 HDTV 1080P
27 1920*1080 112.50 100.00 297.00 HDTV 1080P
28 3840*2160 53.95 23.98 296.703 UDTV 2160P
29 3840*2160 54.00 24.00 297.00 UDTV 2160P
30 3840*2160 56.25 25.00 297.00 UDTV 2160P
31 3840*2160 61.43 29.97 296.703 UDTV 2160P
32 3840*2160 67.50 30.00 297.00 UDTV 2160P
When HDMI1,2,3
33 3840*2160 112.50 50.00 594.00 UDTV 2160P
UHD DEEP COLOUR ON
When HDMI1,2,3
34 3840*2160 134.865 59.94 593.407 UDTV 2160P
UHD DEEP COLOUR ON
When HDMI1,2,3
35 3840*2160 135.00 60.00 594.00 UDTV 2160P
UHD DEEP COLOUR ON
-8- Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
No Resolution H-freq (kHz) V-freq (Hz) Pixel clock (MHz) Proposed Remarks
36 4096*2160 53.95 23.98 296.703 UDTV 2160P
37 4096*2160 54.00 24.00 297.00 UDTV 2160P
38 4096*2160 56.25 25.00 297.00 UDTV 2160P
39 4096*2160 61.43 29.97 296.703 UDTV 2160P
40 4096*2160 67.50 30.00 297.00 UDTV 2160P
When HDMI1,2,3,4
41 4096*2160 112.50 50.00 594.00 UDTV 2160P
UHD DEEP COLOUR ON
When HDMI1,2,3,4
42 4096*2160 134.865 59.94 593.407 UDTV 2160P
UHD DEEP COLOUR ON
When HDMI1,2,3,4
43 4096*2160 135.00 60.00 594.00 UDTV 2160P
UHD DEEP COLOUR ON
5.1.2. HDMI Input (PC)
No Resolution H-freq (kHz) V-freq (Hz) Pixel clock (MHz) Proposed Remarks
1 640*350 31.468 70.09 25.17 EGA
2 720*400 31.469 70.08 28.32 DOS
3 640*480 31.469 59.94 25.17 VESA(VGA)
4 800*600 37.879 60.31 40.00 VESA(SVGA)
5 1024*768 48.363 60.00 65.00 VESA(XGA)
6 1360*768 47.712 60.015 84.75 VESA(WXGA)
7 1152*864 54.348 60.053 80.00 VESA
8 1280*1024 63.981 60.020 109.00 SXGA Support to HDMI-PC
9 1920*1080 67.50 60.00 158.40 WUXGA(Reduced Blanking)
10 3840*2160 54.00 24.00 297.00 UDTV 2160P
11 3840*2160 56.25 25.00 297.00 UDTV 2160P
12 3840*2160 67.5 30.00 297.00 UDTV 2160P
13 4096*2160 53.95 23.97 296.703 UDTV 2160P
14 4096*2160 54.00 24.00 297.00 UDTV 2160P
-9- 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.
- 10 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
X_TAL DDR3 2133 X 16
24MHz (512MB X 2EA)
Tuner
Tuner : I2C 5 IF (+/-)
R DDR3 2133 X 16
E (512MB X 2EA)
D-Demod : I2C 2 P_TS
A
R
CVBS/SIF
1. M16 Block Diagram
(H) SYSTEM EEPROM
(256Kb)
USB1 (3.0) OCP eMMC
S 1.5A
Main SOC (8GB)
I
HDMI1 (2.0)
D
E HDMI2 (2.0)
(ARC)
OCP
USB2 (2.0) 1.5A
- 11 -
OCP
USB3 (2.0) 1.5A I2S Out
Audio 2 AMP
HDMI3 (2.0)
HDMI4 (2.0)
R
BLOCK DIAGRAM
Copyright ©
E BLUTOOTH
A HP
R H/P WIFI
AMP
AV SUB
AV / Component Spec Out ASSY
COMP IR / KEY/EYE
IR
OPTIC SPDIF OUT I2C
Only for training and service purposes.
KEY
LAN
X_TAL Sub Micom
25MHz
X_TAL
LG Electronics. Inc. All rights reserved.
32.768kHz
TUNER +3.3V_TUNER
CI Slot
2. Tuner + CI
[+3.3V_LNA_TU] 3 +1.2V_Demod_Core
PCM_5V_CTL CI 5V +5V_CI_ON
[+3.3V_TUNER] 11 VCC
Power detect
+3.3V_TUNER
MAIN
+5V_CI_ON +3.3V_NORMAL
[D_Demod_Core] 13 SOC
1.2Kȳ C25 [CAM_VCCEN_N]
[I2C_SCL5_TU] 1 I2C_SCL5 10K ȳ 47K ȳ
33 ȳ AH25[SCL5] C23[CAM_CD1_N] /CI_CD1,2
[I2C_SDA5_TU] 2 I2C_SDA5 AH26[SDA5] B23[CAM_CD2_N] /CI_CD1,2
G28[TPI_VAL]
CI_TS_VAL CI_TS_VAL
[FE_DEMOD1_TS_ERROR_TU] 14 FE_DEMOD1_TS_ERROR
/PCM_CE1.2
[FE_DEMOD1_1_TS_CLK] 15 AC29 [TP_DVB_CLK] B25[CAM_CE1_N] /PCM_CE1.2
FE_DEMOD1_TS_CLK AC30 [TP_DVB_SOP] B26[CAM_CE2_N]
[FE_DEMOD1_TS_SYNC] 16
[FE_DEMOD1_TS_VAL] 17 FE_DEMOD1_TS_SYNC AB30 [TP_DVB_VAL]
FE_DEMOD1_TS_VAL /PCM_IOWR
B29 [EB_BE_N1] /PCM_IOWR
E28 [EB_EB_N0]
/PCM_IORD
/PCM_IORD
CI_ADDR[0-14]
- 12 -
FE_DEMOD1_TS_DATA[0] 18 [EB_ADDR_0~14] CI_ADDR[0-14]
AB28 [TP_DVB_DATA0]
FE_DEMOD1_TS_DATA[1] 19
AC28 [TP_DVB_DATA1] CI_TS_DATA[0-7]
FE_DEMOD1_TS_DATA[2] 20
FE_DEMOD1_TS_DATA [0-7] AD28 [TP_DVB_DATA2] [EB_DATA_0~7] CI_DAT[0-7]
FE_DEMOD1_TS_DATA[3] 21
AD29 [TP_DVB_DATA3]
FE_DEMOD1_TS_DATA[4] 22
AE29 [TP_DVB_DATA4] PCM_RESET
FE_DEMOD1_TS_DATA[5] 23 A24[CAM_RESET] PCM_RESET
AE30 [TP_DVB_DATA5]
FE_DEMOD1_TS_DATA[6] 24 /PCM_WAIT
AF29 [TP_DVB_DATA6] C24[CAM_WAIT_N] /PCM_WAIT
FE_DEMOD1_TS_DATA[7] 25
AF30 [TP_DVB_DATA7] PCM_INPACK
Copyright ©
PCM_INPACK
A25[CAM_REG_N]
/PCM_REG /PCM_REG
/PCM_IRQA /PCM_IRQA
/TU_RESET1 B24[CAM_IREQ_N]
[/TU_RESET1_TU] 10 AK14 [GPIO26] /PCM_OE
A32 [EB_OE_N] /PCM_OE
/PCM_WE
D28 [EB_WE_N] /PCM_WE
IF_P ADC_I_INP
[IF_P] 7 AN31 [DMD_ADC_INP] CI_IN_TS_CLK
FILTER P30 [TPO_CLK] CI_IN_TS_CLK
IF_N ADC_I_INN CI_IN_TS_VAL
[IF_N] 8 AN32 [DMD_ADC_INN]
P29 [TPO_VAL] CI_IN_TS_VAL
CI_IN_TS_SYNC
N29 [TPO_SOP] CI_IN_TS_SYNC
Only for training and service purposes.
TPI_DATA [0-7] CI_TS_DATA[0-7]
IF_AGC [TPI_DATA 0~7] 100 ȳ CI_TS_DATA[0~7]
[IF_AGC_TU] 5 AL31[IF_AGC]
TPO_DATA[0-7] CI_IN_TS_DATA[0-7]
[TPO_DATA[ 0~7] 33 ȳ CI_IN_TS_DATA[0-7]
LG Electronics. Inc. All rights reserved.
A 1
AV
AV1 Jack Side SOC Side
ACK
Phone JACK MAIN SOC
AV_CVBS_IN AV1_CVBS_IN_SOC
AM24 [CVBS_IN2]
AL18 [AUAD_L_CH2_IN
AV / Component Spec Out COMP2/AV_L_IN AUAD_L_CH2_IN AM18 [AUAD_R_CH2_IN]
COMP2/AV_R_IN AUAD_R_CH2_IN
Component 1
Phone JACK COMP2_SOG2_IN_SOC
COMP2_Y_IN_SOC AM20 [SOY1_IN]
COMP2_Pb_IN_SOC AN20 [Y1_IN]
COMP2_Pb
3. Video & Audio IN/OUT
COMP2_Pr_IN_SOC AL21 [PB1_IN]
COMP2_Y AM22 [PR1_IN]
COMP2_Pr
Front Speaker
Audio [SCK]
AMP [LRCK] I2S
[DACLRCH]
NTP7515
[I2C_SCL_0/SDA_0]
AMP_RESET
- 13 -
[GPIO23]
Woofer Speaker
Audio
AMP
NTP7515
Copyright ©
AMP_MUTE MICOM
(WOOFER_MUTE)
SPDIF OUT
SPDIF_OUT
AM14 [IEC958OUT]
ARC OUT
(HDMI2) SPDIF_OUT_ARC
[PHY0_ARC_OUT]
Only for training and service purposes.
H/P JACK HP_LOUT_JACK
HP_ROUT_JACK HP AMP AL15 [AUDA_OUTL]
TPA6138 AM15 [AUDA_OUTR]
LG Electronics. Inc. All rights reserved.
MICOM MAIN SOC 4. HDMI 2.0
CEC_REMOTE
+5V
Port_1
HDMI 1 [HDMI2_3_SDA]
DDC_I2C_1 HDMI2.0 HDCP1.4
(2.0)_V [HDMI2_3_SCL]
LGE PHY HDCP2.2
HDMI_HPD_1
[HDMI2_3_HPD]
CEC_REMOTE
+5V
HDMI 2 Port_2
[HDMI2_2_SDA]
(2.0)_V DDC_I2C_2 HDMI2.0 HDCP1.4
[HDMI2_2_SCL]
ARC LGE PHY HDCP2.2
HDMI_HPD_2
[HDMI2_2_HPD]
SPDIF_OUT_ARC
CEC_REMOTE
- 14 -
+5V Port_3
HDMI 3 [HDMI2_1_SDA]
DDC_I2C_3 HDMI2.0 HDCP1.4
(2.0)_V [HDMI2_1_SCL]
LGE PHY HDCP2.2
HDMI_HPD_3
[HDMI2_1_HPD]
SPDIF_OUT_ARC
[PHY0_ARC_OUT]
Copyright ©
CEC_REMOTE
+5V
Port_4
HDMI 4 [HDMI2_0_SDA]
(2.0)_H DDC_I2C_4 HDMI2.0 HDCP1.4
[HDMI2_0_SCL]
LGE PHY HDCP 2.2
HDMI_HPD_4
[HDMI2_0_HPD]
Only for training and service purposes.
LG Electronics. Inc. All rights reserved.
MAIN SOC
USB3.0_1_TX_DP0 / DM0
[USB3_0_DP0 / DM0] USB3.0_1_RX_DP0 / DM0
[USB3_0_TX0_P / M] USB3.0_1_DP0 / DM0 +5V_USB_1 USB 1
[USB3_0_RX0_P / M] (3.0)_V
USB_CTL1
[GPIO90] OCP
USB2.0_2_DP1 / DM1 +5V_USB_2 USB 2
[USB2_1_DP0 / DM0]
USB_CTL2 (2.0)_H
[GPIO95] OCP
USB2.0_3_DP0 / DM0 +5V_USB_3
[USB2_0_DP0 / DM0] USB 3
USB_CTL3 (2.0)_H
[GPIO34] OCP
5. USB / Wi-Fi / M-Remote / UART
WIFI_DP / DM IR + Wi-Fi /BT
[USB2_2_DP0 / DM0] Wafer 25P
- 15 -
+3.5V_WIFI
WIFI_EN
MICOM
WOL/WIFI_POWER_ON
Copyright ©
SOC_RX/TX
SOC_RX/TX UART wafer
[UART0_RXD/GPIO106] (*) US model only
SOC_RX/TX
[UART0_TXD/GPIO105] RS232 IC
JK6200
Only for training and service purposes.
UART1_RX/TX RS232C phone Jack
[UART1_RXD / TXD] Debug Wafer
LG Electronics. Inc. All rights reserved.
Cap Ready
MAIN SOC
+3.3V_NORMAL
100 ˟
6. Power Block
AUDIO AMP
33pF +3.3V_TU
ZUZr˟
I2C_SCL0: AK23[SCL0] ZZ˟ LNB
AUDIO AMP 100 ˟
I2C_SDA0: AJ23[SDA0] YU^r˟
33pF
I2C_SCL3: AH24[SCL3] ZZ˟ TUNER (Demod)
+3.3V_NORMAL I2C_SDA3: AJ24[SDA3]
18pF
ZUZr˟
+3.3V_NORMAL
I2C_SCL1: AK22[SCL1]
- 16 -
MICOM
I2C_SDA1: AJ22[SDA1]
ZUZr˟
EYE_I2C_SDA ZUZr˟ +3.5V_ST
EYE_I2C_SCL XWW˟ +3.3V_NORMAL I2C_SCL4: AJ21[SCL4]
ZZ˟ NVRAM
Copyright ©
I2C_SDA4: AH21[SDA4]
IR / KEY/EYE
+3.3V_TU
ZUZr˟
I2C_SCL2: AH23[SCL2]
PMIC (EPI) 33 ˟ XUYr˟GOl|P
I2C_SDA2: AH22[SDA2]
WAFER (Vx1)
Only for training and service purposes.
I2C_SCL5: AH25[SCL5]
ZZ˟
I2C_SDA5: AH26[SDA5] Tuner
47pF
LG Electronics. Inc. All rights reserved.
Cap Ready
IC101
0x54 +3.3V_NORMAL Device
M16+ address
IC5300 100 Ω
NTP7515D(AMP)
33pF +3.3V_TU
3.3KΩ 0x10
7. M16+ I2C Map
0x56
IC6900
IC5400 I2C_SCL0: AK23[SCL0] 33Ω
100 Ω LNB
NTP7515D(AMP) I2C_SDA0: AJ23[SDA0] 2.7KΩ
33pF
0xCA
I2C_SCL3: AH24[SCL3] 33Ω TUNER (Demod)
+3.3V_NORMAL I2C_SDA3: AJ24[SDA3]
18pF
3.3KΩ
0x52 +3.3V_NORMAL
I2C_SCL1: AK22[SCL1]
IC3000
R5F100GEAFB(MICOM) I2C_SDA1: AJ22[SDA1]
- 17 -
3.3KΩ
EYE_I2C_SDA 3.3KΩ +3.5V_ST 0xA0
EYE_I2C_SCL 100Ω +3.3V_NORMAL I2C_SCL4: AJ21[SCL4] IC102
33Ω
I2C_SDA4: AH21[SDA4] NVRAM
IR / KEY/EYE
Copyright ©
+3.3V_TU
3.3KΩ
I2C_SCL2: AH23[SCL2]
IC8000 (EPI – PMIC) 33 Ω
I2C_SDA2: AH22[SDA2] 1.2KΩ (EU)
SW50205
P7601 (Vx1 – 51Pin wafer)
0xC0
I2C_SCL5: AH25[SCL5]
33Ω
Only for training and service purposes.
I2C_SDA5: AH26[SDA5] Tuner
47pF
LG Electronics. Inc. All rights reserved.
2016MHz
CPU_PLL 1/ CPU
2
AUD
CTOP_FME0_R13/14/15 CTOP_DPE_R28,29,30
27 MHz 594 MHz
CODEC PLL DCO DISP PLL C4Tx
[27:26] ck_mux_pll_sel_dco : 0: CODEC_PLL, 1: CORE_PLL, 2: DDR_M1PLL
24MHz 2616MHz(2112MHz)
DDR_M0PLL 1/ M0 1308MHz(1056MHz)
xTAL 2
CTOP_GFx_R16/17/18 CTOP_GFx_R10[21] ck_mux_pll_sel_m0 : 0: DDR_M0PLL, 1: DDR_M1PLL
1/ M1 1308MHz(1056MHz)
2208MHz 2
DDR_M1PLL CTOP_GFx_R10[19] ck_mux_pll_sel_m1 : 0: DDR_M0PLL, 1: DDR_M1PLL
CTOP_GFx_R00/01/02
1/n CPUBUS 528MHz
1584 MHz
CTOP_GFx_R10[17:16] ck_mux_pll_sel_lbus : 0: CORE_PLL, 1: CODEC_PLL , 2:DDR_M1PLL
CORE_PLL
CTOP_GFx_R03/04/05 1/n EMMC 200MHz
2400MHz CTOP_GFx_R10[2:1] ck_mux_pll_sel_emmc : 0: CODEC_PLL, 1: CORE_PLL , 2:DDR_M1PLL
CODEC_PLL
- 18 -
1/n CORE 396MHz
8. Clock source and frequency inside chip
CTOP_GFx_R06/07/08
CTOP_GFx_R10[31:30] ck_mux_pll_sel_core : 0: CORE_PLL, 1: CODEC_PLL, 2:DDR_M1PLL
1/n ESM 264MHz
CTOP_GFx_R10
CTOP_GFx_R10[9:8] ck_mux_pll_sel_esm : 0: CORE_PLL, 1: CODEC_PLL, 2:DDR_M1PLL
Copyright ©
1/n GFx 600MHz
1/n AUD 552MHz
Only for training and service purposes.
TE 480MHz
CTOP_GFx_R10[15:14] ck_mux_pll_sel_emmc : 0: CODEC_PLL, 1: CORE_PLL , 2:DDR_M1PLL
648 MHz
GPUPLL GPU 648MHz
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.
420
SB1
440
* Bottom
AB2
AH2
400
ST2
AR2
ST1
510
* Guide Spacer
511
571
AB1
AR1
* Top
450
570
100
820
502
540
500
415
122
821
411
430
120
902
550
LV1
590
530
121
910
412
900
531
123
416
200
200T
- 19 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 SVC Manual
- Disassembly Guide
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Disassembly Guide
※ You must follow the steps of this Manual. (1-1, 1-2, 2-1, 2-2, ... )
1-1 1-2 (1-1) Lay the TV SET on the flat surface table after covering a cotton sheet.
(1-2) Detach a [Cover Ass’y, Hinge Outer].
(1-3) Detach a [Cover Ass’y, Rear Outer].
(1-4) Unfasten screw 8EA at back side of [Cover Ass’y, Rear Center],
and unfasten screw 8EA at bottom side of [Base, Metal].
(1-5) Move the [Moving Handle] 2EA from STAND TYPE to WALL TYPE.
1-3 1-4 1-5
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Disassembly Guide
(2-1) Unfasten the [Moving handle] 2EA in the middle side of [Cover Ass’y, Rear Center].
(2-2) Unfasten Screw 5EA at the bottom side of [Cover Ass’y, Rear Center].
2-1
2-1
2-2
2-2
2-2 2-2
2-2
2-1 2-2
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Disassembly Guide
(3-1) ~ (3-2) Hold each side-bottom area of [Cover Ass’y, Rear Center] by both hands, and then pull up slowly.
(You don’t need a Jig like ‘Plastic scraper for 65G6’ because it will be much easier for you to detach this part compared to 65G6.)
(3-3) If you pulled up all bottom area of [Cover Ass’y, Rear Center], push it up with a little shaking.
3-1 3-2 3-3
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Disassembly Guide
(4-1) Unfasten Screw 8EA.
(4-2) Disconnect Power Cable 3EA.
(4-3) Disconnect VX1 Cable 2EA.
4-3
4-2
4-3
4-2
4-1
4-1
4-2
4-1 4-1 4-1 4-1
4-1
4-1
4-2 4-3
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Disassembly Guide
(5-1) ~ (5-2) Unhook the cable from [Plate, T-Con] during cable disconnection.
(5-3) Unhook 4EA springs from Locking Bracket Ass’y.
(5-4) Move 2EA Locking Bracket Ass’y to upper area.
(5-3) Pull with raising up the [AV BOX] like a picture to separate the hooks of [Hinge Ass’y].
(This process should be worked by two workers.)
5-3 5-3 5-3 5-3
5-1
5-2
5-3
5-5
5-4 5-4
Separate
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Disassembly Guide
(6-1) Turn and put down the [AV BOX] like a picture. Before that, cover the table with a cotton sheet or something like that.
Grille area of [AV BOX] shouldn’t be touched the table. So, put grille area out from the table like below pictures.
(6-2) Unfasten the [A] Screw 22EA and Do not unfasten [b] Screw 4EA.
You need to check the arrow mark. If there are arrow marked screws, Do not unfasten that.
6-1
Grille ※ Do not unfasten arrow
marked screws
Table
[A] [B]
Cotton sheet or Pad
6-2 6-2
6-2 6-2 6-2 6-2 6-2 6-2
6-2
6-2 6-2
※ Do not unfasten these screws
6-2
6-2
6-2 6-2 6-2 6-2 6-2 6-2 6-2 6-2 6-2
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Disassembly Guide
(7-1) Turn the [AV BOX] like this guide.
Turn the [AV Box]
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Disassembly Guide
(8-1) ~ (8-4) Separate the inside latches of [Cover Ass’y, AV BOX] following the steps.
8-1 8-2 8-3 8-4
8-2
8-1
8-4
8-3
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Disassembly Guide
(9-1) Grip the third lane at the front side and grip the first lane at the rear side like the picture,
and then lift up having a little power, you can separate the latches middle area of [Cover Ass’y, AV BOX].
(9-2) Do the same working at Opposite side to separate middle area of [Cover Ass’y, AV BOX].
9-1 9-2
You have to separate these
inside latches.
9-1
Latch separation
9-2
Latch separation
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Disassembly Guide
(10-1) ~ (10-2) Put the [Cover Ass’y, AV Box] up like the picture, and lay down on the table.
10-1
10-2
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Disassembly Guide
(11-1) Disconnect a Power Cord.
11-1
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Disassembly Guide
(12-1) Unfasten Screw 6EA at [Hinge Ass’y]. (L/R each 3EA)
(12-2) Unfasten Screw 6EA at [Cover, Hinge Front].
12-1 12-1
12-1 12-1
12-2 12-2 12-2 12-2 12-1 12-2
12-2 12-1
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Disassembly Guide
(13-1) Disconnect the connector 3EA of Power Cables.
(13-2) Disconnect the connector 2EA of VX1 Cables.
(13-3) Separate the [Cover Ass’y, Hinge Cable] and then put down it on the table.
(※ If you change these cables, refer to the extra guide at final pages.)
13-1 13-2 13-3
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Disassembly Guide
(14-1) ~ (14-4) Disconnect and separate [Woofer Speakers] and [Front Speakers].
Woofer Speaker Front Speaker Front Speaker Woofer Speaker
14-2 14-3
14-1 14-4
14-1 14-2
14-3 14-4
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Disassembly Guide
(15-1) Unfasten the Screw 4EA from [Sub PCB] and Disconnect indicated connectors.
(15-2) Unfasten the Screw 6EA from [Main PCB] and Disconnect indicated connectors.
Main PCB
Sub PCB
15-2
15-1
15-2
15-2
15-2
15-1
15-1
15-2
15-1 15-1 15-2 15-2
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Disassembly Guide
(16-1) ~ (16-3) Pull and raise up the [Main PCB] using both hands like below pictures.
Be care the tuner not to damage it.
When you separate the PCB, you need a little power because gap pads were stuck at the bottom of PCB.
16-1 16-2
16-3
※ you need a little power because
gap pads were stuck at the bottom of PCB.
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Disassembly Guide
(17-1) Disconnect the Connector and unfasten the Screw 7EA at [PSU Master PCB].
When you separate the PCB, you need a little power because gap pads were stuck at the bottom of PCB.
(17-2) Unfasten [PSU Slave] Screw 7EA.
(17-3) Unfasten [Thermal PCB] Screw 1EA.
(17-4) Unfasten [Fan] Screw 2EA.
PSU Slave
PSU Mater
17-1
17-1 17-2 17-2
17-1 17-2
17-2
FAN
17-1
17-1 17-1 17-1 17-2 17-2 17-2
17-3
17-4
17-1
Thermal PCB
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Disassembly Guide
(18-1) Disassemble the [Bracket Ass’y, Locking] from Module.
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Disassembly Guide
No Part No Description Qty Specification
① AAN75670526 BASE ASSEMBLY 1 BASE - - BASE ASS'Y, METAL_OLE
② MCQ68769224 DAMPER 2 CUTTING SILICON ETC. SILICON G
③ MCQ68769225 DAMPER 1 CUTTING SILICON ETC. SILICON G
④ MCQ68366810 DAMPER 2 COMPLEX ETC. ACRYL THERMAL PAD
⑤ NOT USE (MCQ68366810)DAMPER 1 COMPLEX ETC. ACRYL THERMAL PAD
1
3
2 4
2 4
5
Attach to the mark
☞ Disassembly Complete
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 SVC Manual
- Re-assembly Guide
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Re-assembly Guide
No Part No Description Qty Specification
① AAN75670526 BASE ASSEMBLY 1 BASE - - BASE ASS'Y, METAL_OLE
② MCQ68769224 DAMPER 2 CUTTING SILICON ETC. SILICON G
③ MCQ68769225 DAMPER 1 CUTTING SILICON ETC. SILICON G
④ MCQ68366810 DAMPER 2 COMPLEX ETC. ACRYL THERMAL PAD
⑤ NOT USE (MCQ68366810)DAMPER 1 COMPLEX ETC. ACRYL THERMAL PAD
1
3
2 4
2 4
5
Attach to the mark
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Re-assembly Guide
(2-1) Fasten the [PSU Master] Screw 7EA. (It has one ground M4 screw.)
(2-2) Fasten the [PSU Slave] Screw 7EA and Connect PSU Slave Connector.
(2-3) Fasten the [Thermal PCB] Screw 1EA.
(2-4) Fasten the [Fan] Screw 2EA. (Screw Type Caution)
PSU Slave
PSU Mater
2-1
2-1 2-2 2-2
2-1 2-2
2-2
FAN
2-1
M4 Screw 1EA 2-1 2-1 2-1 2-2 2-2 2-2
2-3
2-4
Thermal PCB
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Re-assembly Guide
(3-1) ~ (3-2) put down the [Main PCB] in place with inserting the Tuner.
3-2
3-1
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Re-assembly Guide
(4-1) Put down [Sub PCB] and Fasten it with Screw 4EA, and then connect the connectors.
(4-2) Fasten the [Main PCB] Screw 6EA and Connect the indicated connectors.
Main PCB
Sub PCB
4-2
4-1
4-2
4-2
4-2
4-1
4-1
4-2
4-1 4-1 4-2 4-2
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Re-assembly Guide
(5-1) ~ (5-4) Insert the Connector of [Woofer & Front Speaker] and then put it down in place.
Woofer Speaker Front Speaker Front Speaker Woofer Speaker
5-2 5-3
5-1 5-4
5-1 5-2
5-3 5-4
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Re-assembly Guide
(6-1) Connect the Power Cable Connector 3EA from the Bottom of [Cover Ass’y, Hinge Cable].
(6-2) Connect the VX1 Cable Connector 2EA from the Bottom of [Cover Ass’y, Hinge Cable].
6-1 6-2
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Re-assembly Guide
(7-1) Fasten the Screw 3EA at each part of [Hinge Ass’y] L/R. (Total 6EA)
(7-2) Fasten the Screw 6EA at [Cover, Hinge front].
7-1 7-1
7-1 7-1
7-2 7-2 7-2 7-2 7-1 7-2
7-2 7-1
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Re-assembly Guide
(8-1) Connect a Power Cord.
(8-2) Arrange the Cable in rib shapes at [Bracket, AV Bottom]. (Refer to the Picture)
8-1
Arrange like this
8-2
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Re-assembly Guide
(9-1) Take out the power Cable 3EA from Bottom Box to upside passing the hole.
(9-2) Take out the VX1 Cable 2EA from Bottom Box to upside passing the hole.
(9-3) Arrange and assemble the [Cover Ass’y, AV Box] to Bottom Box.
9-3
9-1 9-2
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Re-assembly Guide
(10-1) ~ (10-5) Cover and Push evenly [Cover Ass’y, AV Box] with checking assembly status.
(10-6) Check latches indicated the picture whether it is assembled well or not.
10-1 10-2
10-3 10-4
10-5
10-6
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Re-assembly Guide
(11-1) Turn and put down the [AV BOX] like below pictures. Before that, cover the table with a cotton sheet or something like that.
(11-2) To be assembled tightly, Fasten the Screw 22EA holding rear side by the other hand.
※ When you fasten the screws, keep torque between 3~4kgf. If you can’t control at that time, use hand driver.
11-1
Table
Cotton sheet or Pad
11-2 11-2
11-2 11-2 11-2 11-2 11-2 11-2
11-2
11-2 11-2
11-2
11-2
11-2 11-2 11-2 11-2 11-2 11-2 11-2 11-2 11-2
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Re-assembly Guide
[Extra Guide] Working Guide to replace a Module.
Remove the protection film for Module.
MODULE Front surface MODULE Rear surface
Remove the protection film for Module.
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Re-assembly Guide
(12-1) Lift up carefully [AV Box] like below picture and Insert the Temporary-Fixing structure of [Hinge Assy] to [T-Con Plate].
At this time, be careful the crash between [AV Box] and [Glass]. (This process should be worked by two workers.)
(12-2) Hook the 4EA Springs from Locking Bracket Ass’y to Rail Guide bracket (White color).
Landing
12-1
12-2 12-2 12-2 12-2
Insert
Caution!
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Re-assembly Guide
(13-1) Fasten M4 Screw 8EA.
(13-2) Connect the Power Cable 3EA.
(13-3) Connect the VX1 Cable 2EA.
13-3
13-2
13-3
13-2
13-1
13-1
13-2
13-1 13-1 13-1 13-1
13-1
13-1
13-2 13-3
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Re-assembly Guide
(14-1) Set the right position of [Rear Cover] bottom side and then Push evenly upper side to assemble the latches well.
(14-2) Fasten [Moving Handle] 2EA at the center of [Cover Ass’y, Rear Center].
(14-3) Fasten the Screw 5EA at the bottom of [Cover Ass’y, Rear Center].
14-1
14-2
14-2 14-2
14-3 14-3 14-3
14-3 14-3 14-3
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
OLED77G7 Re-assembly Guide
(15-1) Move [Moving Handle] 2EA from WALL TYPE to STAND TYPE.
(15-2)~(15-3) Fasten the Screw 8EA at [Cover Ass’y, Rear Center] and fasten the Screw 8EA at [Base, Metal].
(15-4) Insert the latches of [Cover Ass’y, Rear Outer] at upper side and push & assemble the holders at bottom side.
(15-5) Attach the [Cover Ass’y, Hinge Outer] by Magnet force.
(15-6) Make the TV SET stand up by two or more people.
(15-7) Re-assembly Complete.
15-1 15-2 15-3 15-4
15-5 15-6 15-7
☞ Re-assembly Complete
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
※Extra Guide : OLED77G7 Hinge Cable Cover Assy Disassembly/Re-assembly Guide
(a-1) Unfasten Screw 2EA at [Hinge Ass’y] L/R
(a-2) Unfasten Screw 4EA at [Hinge Cable Cover Front & Rear]
a-1
a-2
a-2 a-2 a-2
a-2
a-1
a-1
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
※Extra Guide : OLED77G7 Hinge Cable Cover Assy Disassembly/Re-assembly Guide
(b-1) ~(b-3) Holding each surface of [Hinge Cable Cover Front & Rear], Separate Latches in both Parts sequentially like below pictures.
b-1 b-2 b-3
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
※Extra Guide : OLED77G7 Hinge Cable Cover Assy Disassembly/Re-assembly Guide
(c-1)~(c-2) Separate the Cables from [Cover, Hinge Cable Rear].
Disassembly Complete.
c-1
c-2
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
※Extra Guide : OLED77G7 Hinge Cable Cover Assy Disassembly/Re-assembly Guide
(Re-Assembly)
(d-1) VX1 Cable Connectors attached label should be facing down.
(d-2) Arrange the Cables like below picture. You have to keep the point which are gathered by taping and follow the cable management guide.
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
※Extra Guide : OLED77G7 Hinge Cable Cover Assy Disassembly/Re-assembly Guide
(e-1) Gather the taping point of Power Cable 3EA
(e-2) Refer to the Cabld length in the pictures to arrange the cables.
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
※Extra Guide : OLED77G7 Hinge Cable Cover Assy Disassembly/Re-assembly Guide
(f-1) Assemble the Latch structures between [Cover, Hinge Cable Rear & Front].
(f-2) Fasten Screw 4EA. (Torque 3~4 kgf )
f-1
f-2
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
※Extra Guide : OLED77G7 Hinge Cable Cover Assy Disassembly/Re-assembly Guide
(g-1) Put down [Hinge Ass’y] L/R like below picture and fasten Screw 2EA. (Torque 3~4 kgf )
(g-2) Re-assembly Complete.
g-1
g-2
g-1
g-1
☞ Disassembly/Re-assembly Complete.
Copyright © 2017 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 MR15RA operating checking 12
D. Function error
12 Wifi operating checking 13
13 External device recognition error 14
14 E. Noise Circuit noise, mechanical noise 15
15 F. Exterior error Exterior defect 16
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
First of all, Check whether all of cables between board is inserted properly or not.
(Main B/D↔ Power B/D, Vx1 Cable, Speaker Cable, IR B/D Cable,,,)
☞A1 ☞A9
No video Normal Y Check Vx1 lock Y Check Power Normal Y
Normal audio 0V Replace Main Board
audio voltage Board (Main) voltage
20V, 12V etc.
N N
N
Move to No Check Power Board (Module) 24V output Repair Power
☞A9
video/No audio Board or parts
Normal Y
Replace 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
☞A9
Check various voltages Check and
No Video/ of Power Board (Main) Normal Y
replace
No audio (20V, 12V…) 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
. By using Digital signal level meter
☞ A3
. By using Diagnostics menu on OSD
Check RF Signal level ( All Settings→ Channels → Channel Tuning → Manual Tuning → Check the Signal )
- Signal strength (Normal : over 50%)
- Signal Quality (Normal: over 50%)
Y Check whether other equipments have problem or not.
Normal
(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
☞A6 ☞ A7
※ Check
Check color by input
and replace
-External Input Y Y
Color Link Cable Color Color Y
-AV Replace Main B/D Replace module
error? (V by one) error? error?
-HDMI
and contact
N condition N N
Check error End
color input
mode
☞A15 Check
External device Y
External Input external
Check Test pattern /Cable Replace Main B/D
error device and
normal
cable
N
Request repair
for external
device/cable
N
Check external External device Y
HDMI
device and /Cable Replace Main B/D
error
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
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
-HDMI Normal? replace Link Replace Main B’D
normal? connection normal? normal?
Cable
condition for LGD Panel
N N Y Y
Replace Main B’D
Replace Request repair End End
module for external
☞A15 device
Check Test pattern
External device screen error-Color error
Check screen Connect other external
condition by input External device and cable Screen N Replace
N -External Input Input (Check normal operation of normal? Main B/D /
Check S/W Version Check
-AV External Input, HDMI/DVI
version
error Module
-HDMI/DVI by connecting Jig, pattern Y
Generator ,Set-top Box etc.
Y
Request repair for
external device
S/W Upgrade
Y
Connect other external
device and cable
(Check normal operation of Screen N Replace
HDMI/ Main B/D /
External Input, Component, normal?
DVI Module
Normal N RGB and HDMI/DVI by
screen? connecting Jig, pattern
Generator ,Set-top Box etc.
Y
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
☞A8 ☞A9
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
☞A9
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 (7.8V)
Y
voltage? N
☞A9 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
Check outlet
☞A10
N Y
Check A/C cord Error? Check Power Off CPU
Replace Main B/D Normal? End
Mode Abnormal
Y N
Check for all 2- phase
power out Abnormal Replace Power B/D
1
Fix A/C cord & Outlet ☞A9
and check each 2
(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
* 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
☞A11 ☞A12+A9
No audio
Check user
N
Check audio B+
Normal Y
menu > Off 20V 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
connecting 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
→ abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio
Wrecked audio/
☞A12+A9
Check and replace
Discontinuation/ Check audio
speaker and
Noise for B+ Voltage (20V)
connector
Check input all audio
signal
Signal Y
-RF
normal? Wrecked audio/ Y
-External Input Normal
signal Discontinuation/
Replace Main B/D voltage?
N Noise only
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
1. Remote control(R/C) operating error Replace
Main B/D
☞A13 ☞A13 ☞A13
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
☞A9
Check R/C Operating Check & Replace Check 7.8V on Power B/D Repair/Replace
Close
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
Established
Error D. Function error date
symptom
MR15RA operating checking Revised date
2. MR15RA (Magic Remocon) operating error
☞A4
Check the RF Receiver ver N Check MR15RA 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
☞A14
Check & Replace
Check & Repair Battery of MR15RA Close
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 MR15RA
Close
Down load the Firmware
* INSTART MENU12.RF •If you conduct the loop at 3times,
Remocon Test Receiver change the MR15RA.
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
3.Wifi operating error
☞A4 ☞A14
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
☞A14
Check & Repair Close
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
Established
Error D. Function error date
symptom
External device recognition error Revised date
Check technical
Check
Signal Y information Technical N External Input
input 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
14
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
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)
15
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
Zoom part with Module
Replace module
exterior damage damage
Cabinet
Replace cabinet
damage
Remote
control Replace remote control
damage
Stand
Replace stand
dent
16
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 Vx1 lock 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 (Vx1) reconnection
7 A7
condition
A. Video error_ Color error
8 Adjustment Test pattern - ADJ Key A19
Check Cable(1) A-1/6
Check Cable(2) A-2/6
Exchange Main Board (1) A-3/6
9 Defected Type caused by Cable/ Exchange Main Board (2) A-4/6
Main / Power / Module
Exchange Main Board (3) A-5/6
Exchange Power Board (PSU) A-6/6
Exchange Module A-7/7
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
10 Check front display LED A8
B. Power error_ No power
11 Check power input Voltage & ST-BY 3.5V A9
B. Power error_Off when on, off
12 POWER OFF MODE checking method A10
while viewing
Checking method in menu when there is no
13 A11
C. Audio error_ No audio/Normal audio
video Voltage and speaker checking method when
14 A12
there is no audio
15 Remote control operation checking method A13
D. Function error
16 Motion Remote operation checking method A14
17 E. Etc How to use the Service remote control A15-A17
18 E. Etc Check items after Main B/D replacement A18
19 E. Etc Adjustment Test pattern A19
How to use JIG
20 E. Etc A20
(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 Vx1 lock date A1
R7624 : 0[V]
Check a voltage of R7624 after turn on the TV.
If the voltage is low, Vx1 is locked.(OK)
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 A2
date
Entry method
1. Press the ADJ button on the remote control for adjustment.
2. Enter into White Balance of item 12.
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
All Settings 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 OLED TV Version checking method date A4
1. Checking method for remote control for adjustment
Version
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 A5
date
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.
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 OLED TV Connection diagram 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 (Vx1) 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 - 1/7
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 - 2/7
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 - 3/7
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 - 4/7
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 - 5/7
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 - 6/7
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Only for training and service purposes.
Appendix. Examples of Symptoms(OLED Module) Check parts by symptom
Verical line defect Image broken Bright Dot
Horizontal defect and Verical stain Noise Verical line defect Image stain
Horizontal line Multi Verical line Defect Screen darkness
A - 7/7
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 A8
ST-BY condition: On or Off
Power ON condition: Turn Off
A8
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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 A9
date
Check the DC 12VM line for ST-BY Voltage
(ST-BY : 7.8V, Normal : 12V) Power To Main B’d
P202
Power To Module
P201
A9
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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 A10
Entry method
1. Press the IN-START button of the remote control for adjustment
2. Check the entry into adjustment item 3 (Power On/Off Status)
A10
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 A11
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
A11
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 A12
when there is no audio
①
② ②
1 SPK_R-_FT 2 SPK_R+_FT
3 SPK_L-_FT 4 SPK_L+_FT
Checking order when there is no audio 5 SPK_R-_CT 6 SPK_R+_CT
7 SPK_L-_CT 8 SPK_L+_CT
① Check the contact condition of or 20V connector of Main Board
② Measure the 20V 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.
A12
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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 A13
date
Pin Pin name
1 3.5V_WIFI
① IR & EYE Sensor 2 WIFI_DM_JACK
3 WIFI_DP_JACK
② 4 GND
5 WOL/WIFI_POWER_ON
6 3.5V_WIFI
7 COMBO_RESET_JACK
8 GND
9 BT_WAKEUP_DEVICE_JACK
① 10 BT_WAKEUP_HOST_JACK
11 GND
12 GND
13 NC
14 NC
15 NC
16 EYE_SDA_JACK
17 EYE_SDA_JACK
18 GND
19 IR_JACK
20 LED_R_JACK
21 GND
22 +3.5V_ST
23 KEY2_JACK
③ 24 KEY1_JACK
25 GND
Checking order to check remote control
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)
3. AS checking the Pre-Amp(IR LED light) , the power is in ON condition, an Analog Tester
needle should move slowly, otherwise, it’s defective.
A13
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Only for training and service purposes.
Standard Repair Process Detail Technical Manual
Error Established
symptom
D. Function error
date
Revised
Content Motion Remote operation checking method date A14
① Wifi & BT Front Pin Pin name
1 3.5V_WIFI
2 WIFI_DM_JACK
3 WIFI_DP_JACK
② 4 GND
5 WOL/WIFI_POWER_ON
6 3.5V_WIFI
7 COMBO_RESET_JACK
8 GND
9 BT_WAKEUP_DEVICE_JACK
10 BT_WAKEUP_HOST_JACK
11 GND
12 GND
Wifi & BT Rear 13 NC
14 NC
15 NC
16 EYE_SDA_JACK
17 EYE_SDA_JACK
18 GND
19 IR_JACK
20 LED_R_JACK
21 GND
22 +3.5V_ST
23 KEY2_JACK
③ 24 KEY1_JACK
25 GND
Checking order to check motion remote/wifi
Checking order
1.Check BT/Wifi cable condition between BT/Wifi assy & Main board.
2.Check the 3.5V on the terminal 6
A14
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process Detail Technical Manual
Error
symptom
E.Etc Established
date
Revised
Content How to use the Service remote control date A15
1. How to access the remote control
0 4 1 3
0 4 1 3
A15
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Only for training and service purposes.
Standard Repair Process Detail Technical Manual
Error
symptom
E.Etc Established
date
Revised
Content How to use the Service remote control A16
date
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)
A16
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process Detail Technical Manual
Error
symptom E.Etc Established
date
Revised
Content How to use the Service remote control date A17
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
A17
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Only for training and service purposes.
Standard Repair Process Detail Technical Manual
Error Established
symptom E.Etc date
Revised
Content Check items after Main B/D replacement date A18
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.
A18
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Standard Repair Process Detail Technical Manual
Error Established
symptom E.Etc date
Revised
Content Adjustment Test pattern A19
date
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!)
A19
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 20 (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) (LH/LJ) (UH/SJ) (UH) A 20 (2/19)
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 20 (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 20 (4/19)
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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 20 (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 20 (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 20 (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 20 (8/19)
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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 20 (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 20 (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 20 (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 20 (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 20 (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 20 (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 20 (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 20 (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 20 (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 20 (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 20 (19/19) can be judged as defective.
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
