LG OLED55B7V, OLED65B7V Schematic

OLED TV

SERVICE MANUAL

CHASSIS : ED71B

MODEL : OLED55B7V OLED55B7V-Z

OLED65B7V OLED65B7V-Z

CAUTION

BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

P/NO : MFL69894901 (1707-REV01)

CONTENTS

CONTENTS .............................................................................................. 2

SAFETY PRECAUTIONS ........................................................................ 3

SERVICING PRECAUTIONS .................................................................... 4

SPECIFICATION ....................................................................................... 6

SOFTWARE UPDATE .............................................................................10

BLOCK DIAGRAM ................................................................................... 11

EXPLODED VIEW .................................................................................. 17

DISASSEMBLY GUIDE........................................................................... 18

TROUBLE SHOOTING GUIDE ................................................ APPENDIX

- 2 -

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

An isolation Transformer should always be used during the servicing of a receiver whose chassis is not isolated from the AC power line. Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal injury from electrical shocks.

It will also protect the receiver and it's components from being damaged by accidental shorts of the circuitry that may be inadvertently introduced during the service operation.

If any fuse (or Fusible Resistor) in this TV receiver is blown, replace it with the specified.

When replacing a high wattage resistor (Oxide Metal Film Resistor, over 1 W), keep the resistor 10 mm away from PCB.

Keep wires away from high voltage or high temperature parts.

Before returning the receiver to the customer,

always perform an AC leakage current check on the exposed metallic parts of the cabinet, such as antennas, terminals, etc., to be sure the set is safe to operate without damage of electrical shock.

Leakage Current Cold Check(Antenna Cold Check)

With the instrument AC plug removed from AC source, connect an electrical jumper across the two AC plug prongs. Place the AC switch in the on position, connect one lead of ohm-meter to the AC plug prongs tied together and touch other ohm-meter lead in turn to each exposed metallic parts such as antenna terminals, phone jacks, etc. If the exposed metallic part has a return path to the chassis, the measured resistance should be between 1 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.

Leakage Current Hot Check (See below Figure)

Plug the AC cord directly into the AC outlet.

Do not use a line Isolation Transformer during this check. Connect 1.5 K / 10 watt resistor in parallel with a 0.15 uF capacitor between a known good earth ground (Water Pipe, Conduit, etc.) and the exposed metallic parts. Measure the AC voltage across the resistor using AC voltmeter with 1000 ohms/volt or more sensitivity. Reverse plug the AC cord into the AC outlet and repeat AC voltage measurements for each exposed metallic part. Any voltage measured must not exceed 0.75 volt RMS which is corresponds to

0.5 mA. In case any measurement is out of the limits specified, there is possibility of shock hazard and the set must be checked and repaired before it is returned to the customer.

Leakage Current Hot Check circuit

- 3 -

SERVICING PRECAUTIONS

CAUTION: Before servicing receivers covered by this service manual and its supplements and addenda, read and follow the

SAFETY PRECAUTIONS on page 3 of this publication. NOTE: If unforeseen circumstances create conict between the

following servicing precautions and any of the safety precautions on page 3 of this publication, always follow the safety precautions. Remember: Safety First.

General Servicing Precautions

1. Always unplug the receiver AC power cord from the AC power source before;

a. Removing or reinstalling any component, circuit board

module or any other receiver assembly.

b. Disconnecting or reconnecting any receiver electrical plug

or other electrical connection.

c. Connecting a test substitute in parallel with an electrolytic

capacitor in the receiver. CAUTION: A wrong part substitution or incorrect polarity installation of electrolytic capacitors may result in an explosion hazard.

2. Test high voltage only by measuring it with an appropriate high voltage meter or other voltage measuring device (DVM, FETVOM, etc) equipped with a suitable high voltage probe. Do not test high voltage by "drawing an arc".

3. Do not spray chemicals on or near this receiver or any of its assemblies.

4. Unless specied otherwise in this service manual, clean

electrical contacts only by applying the following mixture to the contacts with a pipe cleaner, cotton-tipped stick or comparable non-abrasive applicator; 10 % (by volume) Acetone and 90 % (by volume) isopropyl alcohol (90 % - 99 % strength)

CAUTION: This is a ammable mixture. Unless specied otherwise in this service manual, lubrication

of contacts in not required.

5. Do not defeat any plug/socket B+ voltage interlocks with which receivers covered by this service manual might be equipped.

6. Do not apply AC power to this instrument and/or any of its electrical assemblies unless all solid-state device heat sinks are correctly installed.

7. Always connect the test receiver ground lead to the receiver chassis ground before connecting the test receiver positive lead. Always remove the test receiver ground lead last.

8. Use with this receiver only the test xtures specied in this

service manual.

CAUTION: Do not connect the test xture ground strap to any

heat sink in this receiver.

Electrostatically Sensitive (ES) Devices

Some semiconductor (solid-state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES

devices are integrated circuits and some eld-effect transistors

and semiconductor “chip” components. The following techniques should be used to help reduce the incidence of component damage caused by static by static electricity.

1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed to prevent potential shock reasons prior to applying power to the unit under test.

2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.

3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.

4. Use only an anti-static type solder removal device. Some sol-

der removal devices not classied as “anti-static” can generate electrical charges sufcient to damage ES devices.

5. Do not use freon-propelled chemicals. These can generate

electrical charges sufcient to damage ES devices.

6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conductive material).

7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed. CAUTION: Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.

8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your

foot from a carpeted oor can generate static electricity sufcient to damage an ES device.)

General Soldering Guidelines

1. Use a grounded-tip, low-wattage soldering iron and appropriate tip size and shape that will maintain tip temperature within the range or 500 °F to 600 °F.

2. Use an appropriate gauge of RMA resin-core solder composed of 60 parts tin/40 parts lead.

3. Keep the soldering iron tip clean and well tinned.

4. Thoroughly clean the surfaces to be soldered. Use a mall wirebristle (0.5 inch, or 1.25 cm) brush with a metal handle. Do not use freon-propelled spray-on cleaners.

5. Use the following unsoldering technique

a. Allow the soldering iron tip to reach normal temperature.

(500 °F to 600 °F) b. Heat the component lead until the solder melts. c. Quickly draw the melted solder with an anti-static, suction-

type solder removal device or with solder braid.

CAUTION: Work quickly to avoid overheating the circuit board printed foil.

6. Use the following soldering technique. a. Allow the soldering iron tip to reach a normal temperature

(500 °F to 600 °F)

b. First, hold the soldering iron tip and solder the strand

against the component lead until the solder melts.

c. Quickly move the soldering iron tip to the junction of the

component lead and the printed circuit foil, and hold it there only until the solder ows onto and around both the component lead and the foil. CAUTION: Work quickly to avoid overheating the circuit board printed foil.

d. Closely inspect the solder area and remove any excess or

splashed solder with a small wire-bristle brush.

- 4 -

IC Remove/Replacement

Some chassis circuit boards have slotted holes (oblong) through which the IC leads are inserted and then bent at against the circuit foil. When holes are the slotted type, the following technique should be used to remove and replace the IC. When working with boards using the familiar round hole, use the standard technique as outlined in paragraphs 5 and 6 above.

Removal

1. Desolder and straighten each IC lead in one operation by gently prying up on the lead with the soldering iron tip as the solder melts.

2. Draw away the melted solder with an anti-static suction-type solder removal device (or with solder braid) before removing the IC.

Replacement

1. Carefully insert the replacement IC in the circuit board.

2. Carefully bend each IC lead against the circuit foil pad and solder it.

3. Clean the soldered areas with a small wire-bristle brush. (It is not necessary to reapply acrylic coating to the areas).

"Small-Signal" Discrete Transistor Removal/Replacement

1. Remove the defective transistor by clipping its leads as close as possible to the component body.

2. Bend into a "U" shape the end of each of three leads remaining on the circuit board.

3. Bend into a "U" shape the replacement transistor leads.

4. Connect the replacement transistor leads to the corresponding leads extending from the circuit board and crimp the "U" with long nose pliers to insure metal to metal contact then solder each connection.

Power Output, Transistor Device Removal/Replacement

1. Heat and remove all solder from around the transistor leads.

2. Remove the heat sink mounting screw (if so equipped).

3. Carefully remove the transistor from the heat sink of the circuit board.

4. Insert new transistor in the circuit board.

5. Solder each transistor lead, and clip off excess lead.

6. Replace heat sink.

Diode Removal/Replacement

1. Remove defective diode by clipping its leads as close as possible to diode body.

2. Bend the two remaining leads perpendicular y to the circuit board.

3. Observing diode polarity, wrap each lead of the new diode around the corresponding lead on the circuit board.

4. Securely crimp each connection and solder it.

5. Inspect (on the circuit board copper side) the solder joints of the two "original" leads. If they are not shiny, reheat them and if necessary, apply additional solder.

3. Solder the connections. CAUTION: Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures.

Circuit Board Foil Repair

Excessive heat applied to the copper foil of any printed circuit board will weaken the adhesive that bonds the foil to the circuit board causing the foil to separate from or "lift-off" the board. The following guidelines and procedures should be followed whenever this condition is encountered.

At IC Connections

To repair a defective copper pattern at IC connections use the following procedure to install a jumper wire on the copper pattern side of the circuit board. (Use this technique only on IC connections).

1. Carefully remove the damaged copper pattern with a sharp knife. (Remove only as much copper as absolutely necessary).

2. carefully scratch away the solder resist and acrylic coating (if used) from the end of the remaining copper pattern.

3. Bend a small "U" in one end of a small gauge jumper wire and carefully crimp it around the IC pin. Solder the IC connection.

4. Route the jumper wire along the path of the out-away copper pattern and let it overlap the previously scraped end of the good copper pattern. Solder the overlapped area and clip off any excess jumper wire.

At Other Connections

Use the following technique to repair the defective copper pattern at connections other than IC Pins. This technique involves the installation of a jumper wire on the component side of the circuit board.

1. Remove the defective copper pattern with a sharp knife. Remove at least 1/4 inch of copper, to ensure that a hazardous condition will not exist if the jumper wire opens.

2. Trace along the copper pattern from both sides of the pattern break and locate the nearest component that is directly connected to the affected copper pattern.

3. Connect insulated 20-gauge jumper wire from the lead of the nearest component on one side of the pattern break to the lead of the nearest component on the other side. Carefully crimp and solder the connections. CAUTION: Be sure the insulated jumper wire is dressed so the it does not touch components or sharp edges.

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 -

SPECIFICATION

NOTE : Specifications and others are subject to change without notice for improvement

.

1. Application range

This specification is applied to the OLED TV with ED71B chassis.

2. Requirement for Test

Each part is tested as below without special appointment. (1) Temperature: 25 °C ± 5 °C(77 °F ± 9 °F), CST: 40 °C ± 5 °C (2) Relative Humidity: 65 % ± 10 % (3) Power Voltage

: Standard input voltage (AC 100~240 V, 50/60 Hz) * Standard Voltage of each products is marked by models.

(4) Specification and performance of each parts are followed

each drawing and specification by part number in accordance with BOM.

(5) The receiver must be operated for about 20 minutes prior

to the adjustment.

3. Test method

(1) Performance: LGE TV test method followed (2) Demanded other specification

- Safety : CE, IEC specification

- EMC : CE, IEC specification

- Wireless : Wireless HD Specification (Option)

4. Model General Specification

No. Item Specication 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

1 Market

EU(PAL Market-36Countries)/CIS + Morocoo(Africa)

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, Croatia, Turkey, Morocco, Ireland, Latvia, Estonia, Lithuania, Poland, Portugal, Romania, Albania, Bosnia, Serbia, Slovakia, Belarus, UK, Sweden, Denmark, 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, Norway, 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 7.3WEUTELSAT 16.0E, EXPRESS AM1 40.0E, EXPRESS AM3 140.0E, EXPRESS AM33 96.5E, HELLASSAT 39.0E, HISPASAT 1CDE 30.0WHOTBIRD 13.0E, INTELSAT10&7 68.5E, INTELSAT15 85.2E, INTELSAT1R 50.0W, INTELSAT903 33.5W, INTELSAT904 60.0E, NILESAT 7.0W, NSS12 57.0E, THOR 0.8W, TURKSAT 42.0E, YAMAL201 90.0E, OTHER

- 6 -

No. Item Specication Remarks

(1) Digital TV

- DVB-T

- DVB-T2*

2 Broadcasting system

3 Channel coverage

4 Receiving system

Head phone out

5

HDMI Input (3EA)

6

SPDIF out (1EA) SPDIF out

7

USB (3EA) EMF, For SVC (download) JPEG, MP3

8

Ethernet Connect (1EA) Ethernet Connect STP cable

9

PCMCIA Card slot (1EA) PCMCIA slot

10

- DVB-C

- 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

- S Band III : 300~470MHz

2) DVB-C

- 46 ~ 890MHz

3) DVB-S/S2

- 950~2150MHz

(2) Analogue TV

- 46~862MHz

Analog : Upper Heterodyne Digital : COFDM, QAM

Antenna, HDMI1, HDMI2, HDMI3, HDMI4 USB1, USB2, USB3

HDMI1-DTV HDMI2-DTV HDMI3-DTV

*:Depending on country

* Only DVB-T2/C/S2 support model only.

► 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 16-QAM : 1/2, 2/5, 2/3, 3/4, 5/6 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

- 7 -

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)

5 720*576 15.625 50.00 13.500

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

33 3840*2160 112.50 50.00 594.00 UDTV 2160P

34 3840*2160 134.865 59.94 593.407 UDTV 2160P

35 3840*2160 135.00 60.00 594.00 UDTV 2160P

SDTV, DVD 576I(625I) 50Hz

Spec. out but display

When HDMI1,2,3 UHD DEEP COLOUR ON

- 8 -

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

41 4096*2160 112.50 50.00 594.00 UDTV 2160P

42 4096*2160 134.865 59.94 593.407 UDTV 2160P

43 4096*2160 135.00 60.00 594.00 UDTV 2160P

When HDMI1,2,3,4 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 -

SOFTWARE UPDATE

1. USB

(1) Insert the USB memory Stick to the USB port. (2) Automatically detect the SW Version and show the below

message

(3) Click [YES]: initiate the download and install of the update.

(4) Click [Check Now]: move to “About This TV” page for

update.

(5) TV is updating.

2. NSU

(1) Menu -> All Settings -> General -> About This TV

(2) Click [CHEK FOR UPDATES] : system check newest

version

(3) Click [DOWNLOAD AND INSTALL] (4) TV is updating

(6) After finished the update, below Pop-up appear.

(7) Click [Yes] : TV will be DC OFF -> ON (8) After TV turned on, Check the updated SW Version and

Tool Option.

- 10 -

(5) After finished the update, below Pop-up appear

(6) Turn OFF the TV and On. Check the updated SW Version

and Tool Option

OCP

1.5A

Audio 2 AMP

Main SOC

IF (+/-)

USB1 (3.0)

OPTIC

LAN

DDR3 2133 X 16

(512MB X 2EA)

HDMI1 (2.0)

HDMI2 (2.0)

HDMI3 (2.0)

SYSTEM EEPROM

(256Kb)

USB2 (2.0)

USB3 (2.0)

eMMC

(8GB)

Sub Micom

DDR3 2133 X 16

(512MB X 2EA)

P_TS

X_TAL

24MHz

I2S Out

H/P

AV

D-Demod : I2C 2

R

E

A

R

S

I

D

E

R

E

A

R

(H)

HP

AMP

SPDIF OUT

BLUTOOTH

IR / KEY/EYE

WIFI

SUB

ASSY

IR

KEY

Tuner : I2C 5

X_TAL

25MHz

I2C

CVBS/SIF

Tuner

COMP

(ARC)

X_TAL

32.768kHz

OCP

1.5A

OCP

1.5A

AV / Component Spec Out

HDMI4 (2.0)

1. SOC

BLOCK DIAGRAM

- 11 -

2. Tuner + CI

MAIN

SOC

AC29 [TP_DVB_CLK]

AC30 [TP_DVB_SOP]

AB30 [TP_DVB_VAL]

AN31 [DMD_ADC_INP]

AN32 [DMD_ADC_INN]

TUNER

[FE_DEMOD1_TS_ERROR_TU] 14

[FE_DEMOD1_1_TS_CLK] 15

[FE_DEMOD1_TS_SYNC] 16

[FE_DEMOD1_TS_VAL] 17

FE_DEMOD1_TS_DATA[0] 18

FE_DEMOD1_TS_DATA[1] 19

FE_DEMOD1_TS_DATA[2] 20

FE_DEMOD1_TS_DATA[3] 21

FE_DEMOD1_TS_DATA[4] 22

FE_DEMOD1_TS_DATA[5] 23

FE_DEMOD1_TS_DATA[6] 24

FE_DEMOD1_TS_DATA[7] 25

+1.2V_Demod_Core

[+3.3V_LNA_TU] 3

+3.3V_TUNER

[I2C_SCL5_TU] 1

[I2C_SDA5_TU] 2

[IF_AGC_TU] 5

[/TU_RESET1_TU] 10

FILTER

FE_DEMOD1_TS_CLK

FE_DEMOD1_TS_SYNC

FE_DEMOD1_TS_VAL

FE_DEMOD1_TS_DATA [0-7]

IF_P

IF_N

IF_AGC

ADC_I_INP

ADC_I_INN

I2C_SCL5

I2C_SDA5

33 ȳ

/TU_RESET1

AH25[SCL5]

AH26[SDA5]

AK14 [GPIO26]

AL31[IF_AGC]

FE_DEMOD1_TS_ERROR

[+3.3V_TUNER] 11

[D_Demod_Core] 13

[IF_P] 7

[IF_N] 8

AB28 [TP_DVB_DATA0]

AC28 [TP_DVB_DATA1]

AD28 [TP_DVB_DATA2]

AD29 [TP_DVB_DATA3]

AE29 [TP_DVB_DATA4]

AE30 [TP_DVB_DATA5]

AF29 [TP_DVB_DATA6]

AF30 [TP_DVB_DATA7]

+3.3V_TUNER

1.2Kȳ

33 ȳ

TPO_DATA[0-7] CI_IN_TS_DATA[0-7]

CI Slot

100 ȳ

TPI_DATA [0-7] CI_TS_DATA[0-7]

/PCM_WE

/PCM_OE

/PCM_IRQA

/PCM_REG

PCM_INPACK

/PCM_WAIT

PCM_RESET

CI_TS_DATA[0-7]

CI_ADDR[0-14]

/PCM_IORD

/PCM_IOWR

/PCM_CE1.2

CI_TS_VAL

/CI_CD1,2

CI 5V

Power detect

PCM_5V_CTL

+5V_CI_ON

CI_IN_TS_SYNC

CI_IN_TS_VAL

CI_IN_TS_CLK

[TPO_DATA[ 0~7] CI_IN_TS_DATA[0-7]

[TPI_DATA 0~7] CI_TS_DATA[0~7]

/CI_CD1,2

C23[CAM_CD1_N]

B23[CAM_CD2_N]

CI_TS_VAL G28[TPI_VAL]

B25[CAM_CE1_N]

B26[CAM_CE2_N]

/PCM_CE1.2

10K ȳ

B29 [EB_BE_N1]

E28 [EB_EB_N0]

/PCM_IOWR

/PCM_IORD

[EB_ADDR_0~14]

[EB_DATA_0~7]

CI_ADDR[0-14]

CI_DAT[0-7]

A24[CAM_RESET]

C24[CAM_WAIT_N]

A25[CAM_REG_N]

B24[CAM_IREQ_N]

A32 [EB_OE_N]

D28 [EB_WE_N]

P30 [TPO_CLK]

P29 [TPO_VAL]

N29 [TPO_SOP]

CI_IN_TS_CLK

CI_IN_TS_VAL

CI_IN_TS_SYNC

PCM_RESET

/PCM_WAIT

PCM_INPACK

/PCM_REG

/PCM_IRQA

/PCM_OE

/PCM_WE

VCC

C25 [CAM_VCCEN_N]

+5V_CI_ON +3.3V_NORMAL

47K ȳ

- 12 -

3. Video & Audio IN/OUT

MAIN SOC

AM24 [CVBS_IN2]

AV_CVBS_IN

AV1

Phone JACK

Component 1

Phone JACK

AV1_CVBS_IN_SOC

AM20 [SOY1_IN]

AN20 [Y1_IN]

AL21 [PB1_IN]

AM22 [PR1_IN]

COMP2_Pb

COMP2_Y

COMP2_Pr

COMP2_SOG2_IN_SOC

COMP2_Y_IN_SOC

COMP2_Pb_IN_SOC

COMP2_Pr_IN_SOC

V

Jack Side SOC Side

SPDIF_OUT

SPDIF OUT

H/P JACK

HP_LOUT_JACK

HP_ROUT_JACK

AM14 [IEC958OUT]

AL15 [AUDA_OUTL]

AM15 [AUDA_OUTR]

SPDIF_OUT_ARC

[PHY0_ARC_OUT]

COMP2/AV_L_IN

COMP2/AV_R_IN

AL18 [AUAD_L_CH2_IN

AM18 [AUAD_R_CH2_IN]

AUAD_L_CH2_IN

AUAD_R_CH2_IN

HP AMP

TPA6138

ARC OUT

(HDMI2)

Front Speaker

Woofer Speaker

MICOM

AMP_RESET

[SCK]

[LRCK]

[DACLRCH]

[I2C_SCL_0/SDA_0]

I2S

[GPIO23]

Audio

AMP

NTP7515

Audio

AMP

NTP7515

AMP_MUTE

(WOOFER_MUTE)

AV / Component Spec Out

- 13 -

4. HDMI 2.0

CEC_REMOTE

MICOM

Port_4

DDC_I2C_4

HDMI_HPD_4

HDCP1.4

HDCP2.2

HDMI 2

(2.0)_V

ARC

HDMI 1

(2.0)_V

CEC_REMOTE

Port_2

DDC_I2C_2

SPDIF_OUT_ARC

HDMI_HPD_2

CEC_REMOTE

Port_1

DDC_I2C_1

HDMI_HPD_1

HDMI2.0

LGE PHY

HDCP1.4

HDCP2.2

HDCP1.4

HDCP 2.2

HDMI2.0

LGE PHY

HDMI2.0

LGE PHY

+5V

HDMI 4

(2.0)_H

HDCP1.4

HDCP2.2

HDMI 3

(2.0)_V

CEC_REMOTE

Port_3

DDC_I2C_3

SPDIF_OUT_ARC

HDMI_HPD_3

HDMI2.0

LGE PHY

[HDMI2_3_HPD]

[HDMI2_3_SDA]

[HDMI2_3_SCL]

[HDMI2_2_HPD]

[HDMI2_2_SDA]

[HDMI2_2_SCL]

[HDMI2_1_HPD]

[HDMI2_1_SDA]

[HDMI2_1_SCL]

[HDMI2_0_HPD]

[HDMI2_0_SDA]

[HDMI2_0_SCL]

[PHY0_ARC_OUT]

+5V

MAIN SOC

- 14 -

5. USB / Wi-Fi / M-Remote / UART

IR + Wi-Fi /BT

Wafer 25P

[UART0_RXD/GPIO106]

USB3.0_1_TX_DP0 / DM0

USB3.0_1_RX_DP0 / DM0

USB3.0_1_DP0 / DM0

[USB3_0_TX0_P / M]

RS232 IC

WIFI_DP / DM

MICOM

WOL/WIFI_POWER_ON

[USB2_2_DP0 / DM0]

SOC_RX/TX

[USB3_0_DP0 / DM0]

[USB3_0_RX0_P / M]

[USB2_1_DP0 / DM0]

USB2.0_2_DP1 / DM1

USB2.0_3_DP0 / DM0

[USB2_0_DP0 / DM0]

[UART1_RXD / TXD]

Debug Wafer

UART1_RX/TX

JK6200

RS232C phone Jack

SOC_RX/TX

UART wafer

SOC_RX/TX

(*) US model only

USB 1

(3.0)_V

USB 2

(2.0)_H

USB 3

(2.0)_H

WIFI_EN

+3.5V_WIFI

OCP

[GPIO90]

USB_CTL1

+5V_USB_1

OCP

[GPIO95]

USB_CTL2

+5V_USB_2

OCP

[GPIO34]

USB_CTL3

+5V_USB_3

[UART0_TXD/GPIO105]

MAIN SOC

- 15 -

6. I2C Map

+3.3V_NORMAL

ZUZr˟

NVRAM

ZUZr˟

+3.3V_NORMAL

ZZ˟

+3.3V_NORMAL

ZUZr˟

AUDIO AM P

100 ˟

TUNER (Demod)

YU^r˟

+3.3V_TU

ZZ˟

MAIN SOC

MICOM

ZZ˟ LNB

IR / KEY/EYE

XWW˟

ZUZr˟

EYE_I2C_SDA

EYE_I2C_SCL

+3.5V_ST

33pF

18pF

Cap Ready

I2C_SCL4: AJ21[SCL4]

I2C_SDA4: AH21[SDA4]

I2C_SCL1: AK22[SCL1]

I2C_SDA1: AJ22[SDA1]

I2C_SCL3: AH24[SCL3]

I2C_SDA3: AJ24[SDA3]

I2C_SCL0: AK23[SCL0]

I2C_SDA0: AJ23[SDA0]

I2C_SCL2: AH23[SCL2]

I2C_SDA2: AH22[SDA2]

I2C_SCL5: AH25[SCL5]

I2C_SDA5: AH26[SDA5]

Tuner

XUYr˟GOl|P

+3.3V_TU

ZZ˟

47pF

+3.3V_NORMAL

ZUZr˟

PMIC (EPI) WAFER (Vx1)

33 ˟

AUDIO AMP

100 ˟

33pF

- 16 -

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

920

910

AS1

200

571

570

120

710

900

521

LV1 LV2

540

810

121

500

530

200T

700

A10

- 17 -

A9

AR2

DISASSEMBLY GUIDE

ྙ Put the set on the flat pad.

ྚ Remove Rear Small Cover

Pull up bottom of Rear Small Cover to remove.

- 18 -

ྛ Remove Stand Screw and Stand

FAB30016103 (M4*12mm), 4EA

Remove Screw 4EA first, next remove Stand

ྜ Remove Back Cover Screw

FAB31843216 (M3*5.5mm, Gray) 9EA

jGG\\ˉ

V]\ˉ G

FAB31843216 (M3*5.5mm, Gray) 1EA

hGG\\ˉ

- 19 -

ྜྷ Remove PowerCord Bracket

Pull up Power Cord, than remove Bracket, next remove cord from PSU.

ྞ Remove Back Cover

Pull up bottom of Back Cover to remove.

- 20 -

TROUBLE SHOOTING GUIDE

Contents of Standard Repair Process

No. Error symptom (High category) Error symptom (Mid category) Page Remarks

1

2 No video/No audio 2

3 Picture broken/ Freezing 3

4 Color error 4

5

6

7

8

9 Wrecked audio/discontinuation/noise 10

10

11

12

A. Video error

B. Power error

C. Audio error

D. Function error

No video/Normal audio 1

Vertical/Horizontal bar, residual image,

light spot, external device color error

No power 6

Off when on, off while viewing, power auto on/off

No audio/Normal video 9

Remote control & Local switch checking

MR15RA operating checking 12

Wifi operating checking 13

7-8

11

5

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.

Standard Repair Process

Error

symptom

A. Video error

No video/ Normal audio

Established

date

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,,,)

☞A9

Board (Main) 20V, 12V etc.

Replace module

Normal

voltage

N

Repair Power Board or parts

End

Y

Replace Main Board

No video Normal audio

Normal

audio

N

Move to No video/No audio

☞A1

Y

Check Vx1 lock voltage

☞A9

Check Power Board (Module) 24V output

0V

Normal voltage

Repair Power Board or parts

YNCheck Power

Y

N

1/15

※Precaution

Always check & record S/W Version and White Balance value before replacing the Main Board

☞A4 & A2

Replace Main Board

1

Re-enter White Balance value

Standard Repair Process

No Video/ No audio

Error

symptom

☞A9

Check various voltages of Power Board (Main)

(20V, 12V…)

A. Video error

No video/ No audio

Normal

voltage?

Replace Power Board and repair parts

Y

N

Check and replace MAIN B/D

Established

date

Revised date

End

2/15

2

Standard Repair Process

☞ A3

Check RF Signal level

Normal Signal?

N

Check RF Cable

Connection

1. Reconnection

2. Install Booster

Y

Error

symptom

A. Video error

Picture broken/ Freezing

Established

date

Revised date

. By using Digital signal level meter . By using Diagnostics menu on OSD

( All Settings→ 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.

(By connecting RF Cable at other equipment)

→ DVD Player ,Set-Top-Box, Different maker TV etc`

☞ A4

N

Normal

Picture?

N

Y

S/W Version

Check

SVC

Bulletin?

Y

N

Check

Tuner soldering

N

3/15

Y

Close

Normal

Picture?

Y

Close

N

Contact with signal distributor

or broadcaster (Cable or Air)

3

S/W Upgrade

Normal

Picture?

Y

Close

N

Replace

Main B/D

Standard Repair Process

☞A6

Check color by input

-External Input

-AV

-HDMI

☞A15

Check Test pattern

Error

symptom

Color

error?

N

Check error color input mode

A. Video error

☞ A7

※ Check

and replace

Y

Link Cable (V by one) and contact condition

External Input

error

Color error

Color

error?

N

Check external device and cable

Y

Replace Main B/D

Established

date

Revised date

External device

/Cable

normal

N

Color

error?

End

Y

N

Y

Replace module

Replace Main B/D

4/15

HDMI error

Check external

device and cable

4

Request repair

for external

device/cable

N

External device

/Cable

normal

Y

Replace Main B/D

Standard Repair Process

Error

symptom

Vertical / Horizontal bar, residual image,

A. Video error

light spot, external device color error

Vertical/Horizontal bar, residual image, light spot

☞A6

Check color condition by input

-External Input

-HDMI

☞A15

Check Test pattern

Screen

normal?

N

Replace module

Check external

Y

device connection condition

Normal?

N

Request repair

for external device

External device screen error-Color error

Check screen condition by input

Check S/W Version

Check

version

Y

S/W Upgrade

Normal

screen?

Y

N

-External Input

-AV

-HDMI/DVI

☞ A7

Check and

Y

replace Link Cable

External

Input error

HDMI/

DVI

Established

date

Revised date

Y

N

Replace Main B’D

for LGD Panel

Replace Main B’D

Screen

normal?

End

Connect other external device and cable

(Check normal operation of External Input, HDMI/DVI by connecting Jig, pattern Generator ,Set-top Box etc.

Connect other external device and cable

(Check normal operation of External Input, Component, RGB and HDMI/DVI by connecting Jig, pattern

Generator ,Set-top Box etc.

Screen

normal?

Request repair for external device

Screen

normal?

N

Y

N

5/15

Replace Module

N

Screen

normal?

Y

End

Replace Main B/D / Module

End

5

Standard Repair Process

☞A8

Check Logo LED

. Stand-By: Red or Turn On . Operating: Turn Off

Check Power cord was inserted properly

Error

symptom

Power LED

On?

N

Normal?

Y

Close

N

Y

Check ST-BY (7.8V)

☞A9

B. Power error

No power

DC Power on by pressing Power Key On Remote control

Normal

voltage?

Y

N

Y

Established

date

Revised date

☞A9

Y

N

Check Power On ‘”High”

Replace Main B/D

Normal

operation?

☞A9

Measure voltage of each output of Power B/D

N

Y

Replace Main B/D

Normal

voltage?

Replace Power B/D

OK?

Y

6/15

Replace

Power B/D

Replace Power B/D

6

Standard Repair Process

Check outlet

Check A/C cord

Check for all 2- phase power out

Error

symptom

Error?

Y

Fix A/C cord & Outlet and check each 2 phase out

B. Power error

Off when on, off while viewing, power auto on/off

☞A10

N

Check Power Off Mode

☞A9

(If Power Off mode is not displayed) Check Power B/D voltage

※ Caution

Check and fix exterior of Power B/D Part

Abnormal

Established

date

Revised date

CPU

1

Normal

voltage?

N

Replace Power B/D

Replace Main B/D

Y

Replace Power B/D

Replace Main B/D

Normal?

N

7/15

Y

End

7

Standard Repair Process

Power Off list

Explanation

Action contents

KEYTIMEOUT

Power off when TV is not turned off during a certain time RESULT : micom force to trigger TV power off. CONDITION : When pressing power key while power on/off status, CPU does not response within 8 seconds

Check & Change Main B/D

1SEC Power OFF

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 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.

Check & Change Main B/D

ACDET

In case of AC Off (It is normal when the power cord is unplugged.)

Normal

If there are many ACDETs connected, Power Board is defective

Check & Change Power B/D

5V MNT

Power off by unstable AC power detect. RESULT : micom check the stable power. CONDITION : When AC on or DC on, stabilization check routine (Power Detect High

Check) fail after multi power on.

Check & Change Power B/D

CPUABNORMAL

If the CPU attempts to reset in case of abnormal operation and Shut Down in case of failure.

Check & Change Main B/D

NO POLING

Power off when receiving no ack. RESULT : TV power off/on (Reboot) CONDITION : There is no I2C response from CPU for 15 seconds.

Check & Change Main B/D

CPUCMD

Power off by main SoC command.

Check & Change Main B/D

INV_ERROR

Power off by module error (OLED) CONDITION : OLED Module send signal to micom

Check & Change OLED Module

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

Normal Case

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

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)

Error

symptom

Off when on, off while viewing, power auto on/off

B. Power error

* Please refer to the all cases which can be displayed on power off mode.

Established

date

Revised date

8/15

8

Standard Repair Process

No audio Screen normal

Error

C. Audio error

symptom

No audio/ Normal video

☞A11 ☞A12+A9

Check user menu > Speaker off

Off

Cancel OFF

N

Y

Check audio B+ 20V of Power Board

Replace Power Board and repair parts

Established

date

Revised date

Normal

voltage

Y

N

8/15

Check Speaker disconnection

Disconnection

Y

connecting Speaker

N

9

Replace MAIN Board

End

Standard Repair Process

Check input signal

-RF

-External Input

signal

Error

symptom

C. Audio error

Wrecked audio/ discontinuation/noise

Established

date

Revised date

→ abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio

☞A12+A9

Check audio B+ Voltage (20V)

Normal

voltage?

N

Replace Power B/D

Replace Main B/D

N

Y

Signal

normal?

N

Y

(When RF signal is not received)

Request repair to external

cable/ANT provider

(In case of

External Input

signal error) Check and fix external device

Wrecked audio/

Discontinuation/

Noise for

all audio

Wrecked audio/

Discontinuation/

Noise only

for D-TV

Wrecked audio/

Discontinuation/

Noise only

for Analog

Wrecked audio/

Discontinuation/

Noise only

for External Input

Check and replace speaker and connector

Replace Main B/D

Connect and check other external device

Normal

audio?

9/15

End

Check and fix external device

10

Standard Repair Process

Error

symptom

D. Function error

Remote control & Local switch checking

1. Remote control(R/C) operating error

☞A13

Check R/C itself

Operation

Check R/C Operating

When turn off light

in room

If R/C operate,

Explain the customer

cause is interference

from light in room.

operating?

Normal

N

Check & Replace

Baterry of R/C

operating?

Replace R/C

Check & Repair

Y

Cable connection Connector solder

Normal

N

Y

Close

Normal

operating?

Y

Close

☞A13

N

On Main B/D

Established

date

Revised date

Check B+

3.5V

Normal

Voltage?

N

☞A9

Check 7.8V on Power B/D

Replace Power B/D or

Replace Main B/D

(Power B/D don’t have problem)

☞A13

Y

Check IR

Output signal

10/15

Replace

Main B/D

Normal

Signal?

N

Repair/Replace

IR B/D

Y

11

Standard Repair Process

Error

symptom

D. Function error

MR15RA operating checking

2. MR15RA (Magic Remocon) operating error

☞A4

Check the

INSTART menu

RF Receiver ver

is “00.00”?

☞A14

Check & Repair

Y

RF assy

connection

N

☞A4

RF Receiver ver

is “00.00”?

Y

Down load the Firmware

Check MR15RA itself Operation

N

Close

Normal

operating?

Check & Replace

Battery of MR15RA

Normal

operating?

N

Replace

MR15RA

Y

N

Y

Press the

wheel

Close

Established

date

Revised date

Is show ok

message?

Y

Close

Is show ok

message?

Close

Y

Turn off/on the

N

set and press

the wheel

N

11/15

Press the back key about 5sec

* INSTART MENU12.RF

Remocon Test Receiver

Firmware download

•If you conduct the loop at 3times, change the MR15RA.

12

Standard Repair Process

Error

symptom

3.Wifi operating error

Check the

INSTART menu

☞A4

Wi-Fi Mac value

is “NG”?

☞A14

Check & Repair

Wifi cable

connection

☞A4

Wi-Fi Mac value

is “NG”?

Y

D. Function error

Wifi operating checking

☞A14

N

Check the Wifi wafer

1pin

N

Close

Established

Revised date

Normal

Voltage?

Y

Close

date

N

12/15

Replace

Main B/D

Change the Wifi

Y

assy

13

Standard Repair Process

Check input signal

Error

symptom

Signal

input?

Y

N

Check and fix

external device/cable

D. Function error

External device recognition error

Check technical information

- Fix information

- S/W Version

Technical

information?

accordance

with technical

information

Y

Fix in

N

External Input

Recognition error

Established

Revised date

HDMI/

DVI, Optical

date

13/15

Replace Main B/D

14

Standard Repair Process

Identify nose type

Error

symptom

Circuit

noise

Mechanical

noise

Circuit noise, mechanical noise

Check location of noise

E. Noise

※ Mechanical noise is a natural phenomenon, and apply the 1st level description. When the customer does not agree, apply the process by stage. ※ Describe the basis of the description in “Part related to nose” in the Owner’s Manual.

Replace PSU

OR

Established

date

Revised date

※ When the nose is severe, replace the module (For models with fix information, upgrade the S/W or provide the description)

※ If there is a “Tak Tak” noise from the cabinet, refer to the KMS fix information and then proceed as shown in the solution manual (For models without any fix information, provide the description)

14/15

15

Standard Repair Process

Error

symptom

Zoom part with exterior damage

F. Exterior defect

Exterior defect

Module

damage

Cabinet

damage

Remote

control

damage

Replace module

Replace cabinet

Replace remote control

Established

date

Revised date

15/15

Stand

dent

Replace stand

16

Contents of Standard Repair Process Detail Technical Manual

No. Error symptom Content Page Remarks

1

A. Video error_ No video/Normal audio

2 Check White Balance value A2

3

A. Video error_ video error /Video lag/stop

4 Version checking method A4

5 Tuner Checking Part A5

A. Video error _Vertical/Horizontal bar,

6

residual image, light spot

7

A. Video error_ Color error

8 Adjustment Test pattern - ADJ Key A15

9

Defected Type caused by Cable/ Main / Power / Module

Check Vx1 lock A1

TUNER input signal strength checking method

Connection diagram A6

Check Link Cable (Vx1) reconnection condition

Check Cable(1) A-1/6

Check Cable(2) A-2/6

Exchange Main Board (1) A-3/6

Exchange Main Board (2) A-4/6

Exchange Main Board (3) A-5/6

A3

A7

Exchange Power Board (PSU) A-6/6

Exchange Module A-7/7

Contents of Standard Repair Process Detail Technical Manual

Continued from previous page

No. Error symptom Content Page Remarks

10

B. Power error_ No power

11 Check power input Voltage & ST-BY 3.5V A9

12

13

14

15

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

20 E. Etc

B. Power error_Off when on, off while viewing

C. Audio error_ No audio/Normal video

D. Function error

Check front display LED A8

POWER OFF MODE checking method A10

Checking method in menu when there is no audio

Voltage and speaker checking method when there is no audio

Remote control operation checking method A13

How to use JIG (Power B/D Diganostic Smart Jig Multi Gender)

A11

A12

A20

Standard Repair Process Detail Technical Manual

Error

symptom

Content

A. Video error_No video/Normal audio

Check Vx1 lock

Established

date

Revised

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

Standard Repair Process Detail Technical Manual

Error

symptom

Content

A. Video error_No video/Normal audio

Check White Balance value

Established

date

Revised

date

A2

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

Standard Repair Process Detail Technical Manual

Error

symptom

Content

A. Video error_Video error, video lag/stop

TUNER input signal strength checking method

Established

date

Revised

date

All Settings  Channels  Channel Tuning  Manual Tuning

A3

When the signal is strong,

use the attenuator (-10dB, -

15dB, -20dB etc.)

A3

Standard Repair Process Detail Technical Manual

Error

symptom

Content

Version

A. Video error_Video error, video lag/stop

OLED TV Version checking method

1. Checking method for remote control for adjustment

Established

date

Revised

date

A4

Press the IN-START with the remote control for adjustment

A4

Standard Repair Process Detail Technical Manual

Error

symptom

Content

A. Video error_Video error, video lag/stop

TUNER checking part

Established

date

Revised

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.

A5

Standard Repair Process Detail Technical Manual

Error

symptom

Content

A. Video error _Vertical/Horizontal bar,

residual image, light spot

OLED TV Connection diagram

Established

date

Revised

date

A6

As the part connecting to the external input, check the screen condition by signal

A6

Standard Repair Process Detail Technical Manual

Error

symptom

Content

Check Link Cable (Vx1) reconnection condition

A. Video error_Color error

Established

date

Revised

date

A7

Check the contact condition of the Link Cable, especially dust or mis insertion.

A7

Appendix. Examples of Symptoms(Image error)

Check for poor cable contact

Item

CABLE Color smear

CABLE R Color Excessive

CABLE Screen darkness

Symptom

Name

Cause Symptom Image

Pin 단선

Poor broken pin of FFC cable

Color is Excessive due to FFC Cable

Contact.

screen is dark due to poor contact due

to disconnection of the FFC cable pin.

CABLE G Color Excessive

G color transient due to poor FFC cable

connection

A - 1/7

Appendix. Examples of Symptoms(Image error)

Check for poor cable contact

Item

CABLE Color spread LVDS cable connection problem

Symptom

Name

Cause Symptom Image

CABLE Screen stop

Due to foreign substance withi nLVDS

cable PIN

A - 2/7

Appendix. Examples of Symptoms(Main)

Check parts by symptom

Item

Main Screen noise Bit noise from horizontal screen

Main Screen noise

Main Dark picture Dark left-side screen

Symptom

Name

Cause Symptom Image

Broken screen due to

Main IC problem

Main Broken picture

Top/bottom screen part

Picture problem due to tuner

Inner side quality problem

A - 3/7

Appendix. Examples of Symptoms(Main)

Check parts by symptom

Item

Main Broken screen Broken screen in a horizontal manner

Main Screen spread Screen corner appears blurry

Main Color Spread Color spread on the screen

Symptom

Name

Cause Symptom Image

Main Blurry Screen Blurry picture on the screen

A - 4/7

Appendix. Examples of Symptoms(Main)

Check parts by symptom

Item

Main Broken picture

Main

Symptom

Name

Right-side

Screen

problem

LG logo

Screen problem

Cause Symptom Image

No problem at the initial stage,

G-color spread after 10 minutes

Right-side screen problem

Screen picture spread problem

Main

Right-side

picture problem

No problem at the initial stage.

During Heat run, right-side picture

problem

A - 5/7

Appendix : Exchange Power Board (PSU)

No Light

No picture/Sound Ok

A - 6/7

Appendix. Examples of Symptoms(OLED Module)

Verical line defect Image broken Bright Dot

Check parts by symptom

Horizontal defect and Verical stain Noise

Horizontal line Multi Verical line Defect Screen darkness

Verical line defect

A - 7/7

Image stain

Standard Repair Process Detail Technical Manual

Error

symptom

Content

ST-BY condition: On or Off Power ON condition: Turn Off

B. Power error _No power

Check front Power Indicator

Established

date

Revised

date

A8

Standard Repair Process Detail Technical Manual

Error

symptom

Content

Check the DC 12VM line for ST-BY Voltage (ST-BY : 7.8V, Normal : 12V)

B. Power error _No power

Check power input voltage and ST-BY 3.5V

P202

Established

date

Revised

date

A9

Power To Main B’d

Power To Module

P201

A9

Standard Repair Process Detail Technical Manual

Error

symptom

Content

B. Power error _Off when on, off whiling viewing

POWER OFF MODE checking method

Established

date

Revised

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

Standard Repair Process Detail Technical Manual

Error

symptom

Content

C. Audio error_No audio/Normal video

Checking method in menu when there is no audio

Established

date

Revised

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

Standard Repair Process Detail Technical Manual

Error

symptom

Content

C. Audio error_No audio/Normal video

Voltage and speaker checking method when there is no audio

②

Established

date

Revised

date

①

A12

Checking order when there is no audio

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.

1 SPK_R-_FT 2 SPK_R+_FT

3 SPK_L-_FT 4 SPK_L+_FT

5 SPK_R-_CT 6 SPK_R+_CT

7 SPK_L-_CT 8 SPK_L+_CT

A12

Standard Repair Process Detail Technical Manual

Error

symptom

Content

① IR & EYE Sensor

Remote control operation checking method

D. Function error

②

①

Established

date

Revised

date

③

A13

Pin Pin name

1 3.5V_WIFI 2 WIFI_DM_JACK 3 WIFI_DP_JACK 4 GND 5 WOL/WIFI_POWER_ON 6 3.5V_WIFI 7 COMBO_RESET_JACK 8 9 BT_WAKEUP_DEVICE_JACK

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 24 KEY1_JACK 25 GND

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

Standard Repair Process Detail Technical Manual

Error

symptom

Content

Motion Remote operation checking method

D. Function error

Established

date

Revised

date

A14

① Wifi & BT Front

Wifi & BT Rear

②

Pin Pin name

1 3.5V_WIFI 2 WIFI_DM_JACK 3 WIFI_DP_JACK 4 GND 5 WOL/WIFI_POWER_ON 6 3.5V_WIFI 7 COMBO_RESET_JACK 8 9 BT_WAKEUP_DEVICE_JACK

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

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

Standard Repair Process Detail Technical Manual

Error

symptom

Content

1. How to access the remote control

How to use the Service remote control

D. Function error

0 4 1 3

Established

date

Revised

date

A15

0 4 1 3

A15

Standard Repair Process Detail Technical Manual

Error

symptom

Content

2. Remote control part definition

POWER Power On/Off

How to use the Service remote control

D. Function error

[ETC] Each time pressing the KEY button, Mode gets changed to ETC and P-ONLY each time

Established

date

Revised

date

A16

ETC (Added Function)

P-ONLY (Added

Function)

INPUT Change to the external device mode

ARC

PSM

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

Simplink (Added Function)

All KEY function [PIP PR-][PIP PR+][SWAP]

[PIP INPUT][DVI] KEY Function

Changed to factory mode

All KEY function &[INFO][STILL][HDMI HOT][USB HOT][HDMI4] KEY Action

Change in the order of 16:9=>Zoom1=>Zoom2=>Cinema Zoom=>Aucto Screen=>4:3=>16:9

Changes in the order of Bright Picture=>Easy Picture=>Cinema=>Spots=>Game=>

Custom PIcture1=>Custom Picture2=>Bright Picture

Used when in factory mode

Access to the Simplink-connected device

EYE

TILT Used for screen tilting change (Access to the old PDP control mode)

Digital EYE function ON/OFF

For some Model, access to the Test Pattern

A16

Standard Repair Process Detail Technical Manual

Error

symptom

Content

How to use the Service remote control

D. Function error

Established

date

Revised

date

A17

B-TOOTH (Added function)

IN-START

ADJ

X-STUDIO (Added function)

MENU User function gets activated

EXIT Exit from the current mode

TIME SHIFT (Added function)

MUTE Mute function (0 Volume)

IN-STOP SET to factory mode

VOL + - Volume Up/Down

Connected to Blue-Tooth

Model Nam ex) 42PG60D-NA Current Model Name S/W Version ex) 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

Test Pattern (Off=>White=>Red=>Green=>Blue=>Black=>Pattern=>Off) Change

HDD,USB, external device’s HDD screen is activated

Moves forward/backward of recorded contents

CH + - Channel Up/Down

AV1,2,3 (Added function) Connects to external input 1,2,3

COMP1,2 (Added function)

HDMI1,2,3,4 (Add function)

DVI (Add function) Connects to DVI

Connects to Component 1,2

Connects to HDMI 1,2,3,4

A17

Standard Repair Process Detail Technical Manual

Error

symptom

Content

Check items after Main B/D replacement

Check items afer Main B/D(Model Number D/L, White Balance)

1. Press the Service remote control instart Key.

D. Function error

Established

date

Revised

date

No.7 Select Model Number D/L

- Key in the model name and serial number after checking the ID label on the back cover.

A18

2. Press the Service remote control ADJ Key.

A14

A18

No.13 Select White Balance

- Record the R, G, B (GAIN, Cut) value of the color temperature before main board

replacement.

After replacing the main board, key in the recorded value.

Standard Repair Process Detail Technical Manual

Error

symptom

Content

1

2

3

A. Video error_Color error

Adjustment Test pattern

Established

date

Revised

date

A19

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

Smart JIG Power Diagnosis

Muitl Gender Guide

(P/N : RAD33187801) (P/N : RAD32507801)

A 20 (1/19)

Power Board Muitl Gender JIG Diagram (P/N: RAD33187801)

connector applied

28Pin

18Pin

24Pin

13Y/14Y

12Y

24Pin

15Y

(LF/UF Series)

24Pin

15Y

(OLED)

24Pin

NC

24Pin

28Pin

16Y

(OLED)

17Y

(OLED)

17Y

(SJ/UJ)

28Pin

12Pin

16Y

16Y/17Y

(UH)

(LH/LJ)

12Pin

Includes 49UJ63

16Y/17Y (UH/SJ)

28Pin

16Y

(UH)

18Pin

16Y/17Y

(UH/UJ)

A 20 (2/19)

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

OLED

EG96

EF95

B6 C6 E6

G6

‘16

‘17 OLED

’17 LED

LED

UH95/UH96 UH85/UH93 UH77/UH87 UH75/UH76 UH65/UH68

LH68, LH66, LH60,LH54

B7

C7

E7 G7 W7

SJ95/UJ98 SJ85/UJ94

SJ80, UJ77

UJ75/UJ78

UJ65/UJ68

UJ63/UJ67

LJ61/LJ68 LJ55/LJ58

A 20 (3/19)

Power Board Muitl Gender How to Connect

1

▶ Power Board Muitl Gender JIG

2

2013

“A:

2014

▶ Connect the Muiti Gender to the connector (black)

as shown in picture 2 of the Smart JIG.

A 20 (4/19)

LCD POWER”

Smart Jig Voltage Setting

1

▶ Check power board voltage.

2

▶ Switch the product S/W in JIG to LCD.

▶ LCD MODEL Check the power 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

20V

13.2V/18V

A 20 (5/19)

24V

20V

24V

`15Y OLED(EG96,EF95,EG92,EG93,EG94) Power Board Diagnostic method (1)

1

▶ Check power board voltage.

3

2

▶ Switch the product S/W in JIG to LCD.

▶ LCD MODEL Check the power voltage

and switch(24V) to the correct voltage.

▶ Fix the LCD MODEL switch to 24V.(Smart JIG)

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)

`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)

`16Y OLED(B6) Power Board Diagnostic method

1

3

▶ Connect the 24Pin Power Cable connector to the Multi gender JIG 24Pin connector.

2

▶ Switch the LCD MODEL S/W to 24V by checking the power voltage.

▶ Fix the LCD MODEL switch to 24V.(Smart JIG)

▶ 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)

`16Y OLED(C6) Power Board Diagnostic method

1

3

▶ Check power board voltage.

▶ Smart JIG: Fix the LCD MODEL switch to 24V.(Smart JIG)

2

▶ Disconnect the Main Board 24Pin Power Cable connector.

4

▶ Connect the 24Pin Power Cable connector

to the Muitl Gender JIG 24Pin connector

▶ When the OK LED(24V,12V) turns on, Power Board is normal.

A 20 (9/19)

`16Y OLED(E6) Power Board Diagnostic method

1

3

▶ Check power board voltage.

▶ Fix the LCD MODEL switch to 24V.(Smart JIG)

2

▶ Disconnect the Main Board 24Pin Power Cable connector.

4

▶ Connect the 24Pin Power Cable connector

to the Muitl Gender JIG 24Pin connector

A 20 (10/19)

▶ 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.

`16Y OLED(G6) Power Board Diagnostic method

1

3

▶ Check power board voltage.

▶ Fix the LCD MODEL switch to 24V.(Smart JIG)

2

▶ Disconnect the Main Board 24Pin Power Cable connector.

4

▶ Connect the 24Pin Power Cable connector

to the Muitl Gender JIG 24Pin connector

A 20 (11/19)

▶ 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.

`17Y OLED(B7/C7/E7/G7) Power Board Diagnostic method

1

▶ Disconnect the Main Board 28Pin Power Cable connector.

3

2

▶ Connect the 28Pin Power Cable connector to the Muitl Gender JIG 28Pin connector

4

▶ Switch the LCD MODEL S/W to 20V by checking the power voltage.

▶ Fix the LCD MODEL switch to 20V.(Smart JIG)

A 20 (12/19)

▶ 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.

`17Y OLED(W7) Power Board Diagnostic method

1

▶ Disconnect the Main Board 24Pin Power Cable connector.

3

2

▶ Connect the 24Pin Power Cable connector to the Muitl Gender JIG 28Pin connector

4

▶ Switch the LCD MODEL S/W to 20V by checking the power voltage.

▶ Fix the LCD MODEL switch to 20V.(Smart JIG)

A 20 (13/19)

▶ 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.

`16Y/`17Y LED 18Pin Power Board Diagnostic method

1

3

▶ Check power board voltage.

▶ Fix the LCD MODEL switch to 24V.(Smart JIG)

2

▶ Disconnect the Main Board 18Pin Power Cable connector.

4

▶ Connect the 18Pin Power Cable connector

to the Muitl Gender JIG 24Pin connector

A 20 (14/19)

▶ 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.

`16Y LED(UH95/UH96) Power Board Diagnostic method

1

3

▶ Check power board voltage.

▶ Fix the LCD MODEL switch to 24V.(Smart JIG)

2

▶ Disconnect the Main Board 28Pin Power Cable connector.

4

▶ Connect the 28Pin Power Cable connector

to the Muitl Gender JIG 28Pin connector

A 20 (15/19)

▶ When the OK(24V,12V) LED turns on, Power Board is normal.

▶ When the NG LED turns on, the Power Board can be judged as defective.

`16Y/`17Y LED(UH85/UH93) Power Board Diagnostic method

1

3

▶ Check power board voltage.

▶ Fix the LCD MODEL switch to 24V.(Smart JIG)

2

▶ Disconnect the Main Board 28Pin Power Cable connector.

4

▶ Connect the 28Pin Power Cable connector

to the Muitl Gender JIG 28Pin connector

A 20 (16/19)

▶ 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.

`16Y/`17Y LED 12Pin Power Board Diagnostic method

1

▶ Check power board voltage.

▶ Fix the LCD MODEL switch to 24V.(Smart JIG)

3

2

▶ Disconnect the Main Board 12Pin Power Cable connector.

4

▶ Connect the 12Pin Power Cable connector

to the Muitl Gender JIG 12Pin connector

A 20 (17/19)

▶ 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.

`16Y LED 12Pin Power Board Diagnostic method

1

▶ Check power board voltage.

▶ Fix the LCD MODEL switch to 24V.(Smart JIG)

3

2

▶ Disconnect the Main Board 12Pin Power Cable connector.

4

▶ Connect the 12Pin Power Cable connector

to the Muitl Gender JIG 24Pin connector

A 20 (18/19)

▶ 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.

`17Y LED 28Pin Power Board Diagnostic method

1

▶ Check power board voltage.

▶ Fix the LCD MODEL switch to 20V.(Smart JIG)

3

2

▶ Disconnect the Main Board 28Pin Power Cable connector.

4

▶ Connect the 28Pin Power Cable connector

to the Muitl Gender JIG 28Pin connector

A 20 (19/19)

▶ 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.

LG OLED55B7V, OLED65B7V Schematic

Specifications and Main Features

Frequently Asked Questions

User Manual