LG 43UJ651V Schematic

CONFIDENTIAL

LED TV

SERVICE MANUAL

CHASSIS : UD74P

MODEL : 43UJ65** 43UJ65**-ZA

CAUTION

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

P/NO : MFL69879805 (1707-REV02)

Copyright © 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

CONTENTS

CONTENTS ..............................................................................................	2
SAFETY PRECAUTIONS .........................................................................	3
SERVICING PRECAUTIONS....................................................................	4
SPECIFICATION........................................................................................	6
SOFTWARE UPDATE..............................................................................	11
BLOCK DIAGRAM ..................................................................................	12
EXPLODED VIEW ..................................................................................	25
DISASSEMBLY GUIDE ..........................................................................	26
TROUBLE SHOOTING GUIDE ................................................	APPENDIX

- 2 -	Copyright ©	LG Electronics. Inc. All rights reserved.
	Only for training and service purposes.

SAFETY PRECAUTIONS

IMPORTANT SAFETY NOTICE

Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the Exploded View.

It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent Shock, Fire, or other Hazards.

Do not modify the original design without permission of manufacturer.

General Guidance

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 -	Copyright ©	LG Electronics. Inc. All rights reserved.
	Only for training and service purposes.

SERVICING PRECAUTIONS

CAUTION: Before servicing receivers covered by this service manual and its supplements and addenda, read and follow the SAFETY PRECAUTIONS on page 3 of this publication.

NOTE: If unforeseen circumstances create conflict 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 specified 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 flammable mixture.

Unless specified 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 fixtures specified in this service manual.

CAUTION: Do not connect the test fixture 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 field-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 solder removal devices not classified as “anti-static” can generate electrical charges sufficient to damage ES devices.

5.Do not use freon-propelled chemicals. These can generate electrical charges sufficient 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 floor can generate static electricity sufficient 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, suctiontype 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 flows 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 -	Copyright ©	LG Electronics. Inc. All rights reserved.
	Only for training and service purposes.

IC Remove/Replacement

Some chassis circuit boards have slotted holes (oblong) through which the IC leads are inserted and then bent flat 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.

Fuse and Conventional Resistor

Removal/Replacement

1.Clip each fuse or resistor lead at top of the circuit board hollow stake.

2.Securely crimp the leads of replacement component around notch at stake top.

3.Solder the connections.

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

Circuit Board Foil Repair

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

At IC Connections

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

- 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

This specification is applied to the LED TV with UD74P 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	Specification	Remarks
			DTV & Analog (Total 37 countries)
			DTV (MPEG2/4, DVB-T) : 26 countrie
			Germany, Netherland, Switzerland, Hungary, Austria, Slovenia, Bulgaria,
			France, Spain, , Belgium, Luxemburg, Greece, Czech, Turkey, Morocco,
			Ireland, Latvia, Estonia, Lithuania, Poland, Portugal, Romania, Albania,
			Bosnia, Slovakia, Belarus
			DTV (MPEG2/4, DVB-T2) :11 countries
			UK(Ireland), Sweden, Denmark, Finland, Norway, Ukraine, Kazakhstan,
			Russia, Italy, Croatia, Serbia
			DTV (MPEG2/4, DVB-C) : 37 countries
			Germany, Netherland, Switzerland, Hungary, Austria, Slovenia, Bulgaria,
			France, Spain, Italy, Belgium, Russia, Luxemburg, Greece, Czech, Croa-
			tia, Turkey, Morocco, Ireland, Latvia, Estonia, Lithuania, Poland, Portugal,
1	Market	EU/CIS(PAL Market-37Countries)	Romania, Albania, Bosnia, Serbia, Slovakia, Belarus, UK, Sweden, Den-
			mark, Finland, Norway, Ukraine, Kazakhstan
			DTV (MPEG2/4,DVB-S) : 37 countries
			Germany, Netherland, Switzerland, Hungary, Austria, Slovenia, Bulgaria,
			France, Spain,Belgium, Luxemburg, Greece, Czech, Turkey, Morocco,
			Ireland, Latvia, Estonia, Lithuania, Poland, Portugal, Romania, Albania,
			Bosnia, Slovakia, Belarus, UK(Ireland), Sweden, Denmark, Finland, Nor-
			way, Ukraine, Kazakhstan,Russia, Italy, Croatia, Serbia
			Supported satellite : 35 satellites
			ABS1 75.0E , AMOS 4.0W , ASIASAT3S 105.5E , ASTRA 19.2E , ASTRA
			23.5E , ASTRA 28.2E , ASTRA 4.8E, ATLANTIC BIRD2 8.0W , ATLANTIC
			BIRD3 5.0W , BADR 26.0E , DIRECTV-1R 56.0E , EUROBIRD 9A 9.0E ,
			EUROBIRD3 33.0E , EUTELSAT 36 A/B 36.0E ,
			EUTELSAT W2A 10.0E , EUTELSAT W3A 7.0E , EUTELSAT7WA 7.3W

- 6 -	Copyright ©	LG Electronics. Inc. All rights reserved.
	Only for training and service purposes.

	No.	Item	Specification		Remarks
			1 ) PAL/SECAM B/G/I/D/K
	2	Broadcasting system	SECAM L/L’
			2 ) DVB-T/T2, C, S/S2
			1 ) Digital TV
			-VHF, UHF
			-C-Band, Ku-Band
	3	Program coverage	2) Analogue TV
			-VHF : E2 to E12
			-UHF : E21 to E69
			-CATV : S1 to S20
			-HYPER : S21 to S47
				► DVB-T
				- Guard Interval(Bitrate_Mbit/s)
				1/4, 1/8, 1/16, 1/32
				- Modulation : Code Rate
				QPSK	: 1/2, 2/3, 3/4, 5/6, 7/8
				16-QAM : 1/2, 2/3, 3/4, 5/6, 7/8
				64-QAM	: 1/2, 2/3, 3/4, 5/6, 7/8
				► DVB-T2
				- Guard Interval(Bitrate_Mbit/s)
				1/4, 1/8, 1/16, 1/32, 1/128, 19/128, 19/256,
				- Modulation : Code Rate
				QPSK	: 1/2, 2/5, 2/3, 3/4, 5/6
				16-QAM : 1/2, 2/5, 2/3, 3/4, 5/6
	4	Receiving system	Analog : Upper Heterodyne	64-QAM : 1/2, 2/5, 2/3, 3/4, 5/6
			Digital : COFDM, QAM	256-QAM : 1/2, 2/5, 2/3, 3/4, 5/6
				► DVB-C
				- Symbolrate :
				4.0Msymbols/s to 7.2Msymbols/s
				- Modulation :
				16QAM, 64-QAM, 128-QAM and 256-QAM
				► DVB-S/S2
				- Symbolrate
				DVB-S2 (8PSK / QPSK) : 2 ~ 45Msymbol/s
				DVB-S (QPSK) : 2 ~ 45Msymbol/s
				- 9 iterbi
				DVB-S mode : 1/2, 2/3, 3/4, 5/6, 7/8
				DVB-S2 mode : 1/2, 2/3, 3/4, 3/5, 4/5, 5/6, 8/9, 9/10
	5	Input Voltage	AC 100 ~ 240V 50/60Hz

- 7 -	Copyright ©	LG Electronics. Inc. All rights reserved.
	Only for training and service purposes.

5. External Input Format

5.1. 2D Mode

5.1.1. Component input(Y, CB/PB, CR/PR)

No	Resolution	H-freq(kHz)	V-freq(Hz)	Pixel clock(MHz)	Proposed
1	720*480	15.73	59.94	13.50	SDTV ,DVD 480i
2	720*480	15.75	60.00	13.5135	SDTV ,DVD 480i
3	720*576	15.62	50.00	13.50	SDTV 576i
4	720*480	31.47	59.94	27.00	SDTV 480p
5	720*480	31.50	60.00	27.027	SDTV 480p
6	720*576	31.25	50.00	27.00	SDTV 576p
7	1280*720	44.96	59.94	74.175	HDTV 720p
8	1280*720	45.00	60.00	74.250	HDTV 720p
9	1280*720	37.50	50.00	74.250	HDTV 720p
10	1920*1080	28.12	50.00	74.250	HDTV 1080i
11	1920*1080	33.72	59.94	74.175	HDTV 1080i
12	1920*1080	33.75	60.00	74.250	HDTV 1080i
13	1920*1080	56.25	50.00	148.50	HDTV 1080p
14	1920*1080	67.43	59.94	148.350	HDTV 1080p
15	1920*1080	67.50	60.00	148.50	HDTV 1080p

5.1.2. HDMI Input (PC)

No	Resolution	H-freq(kHz)	V-freq(Hz)	Pixel clock(MHz)	Proposed	Remarks
1	640*350	31.46	70.09	25.17	EGA
2	720*400	31.46	70.08	28.32	DOS
3	640*480	31.46	59.94	25.17	VESA(VGA)
4	800*600	37.87	60.31	40.00	VESA(SVGA)
5	1024*768	48.36	60.00	65.00	VESA(XGA)
6	1152*864	54.34	60.05	80.00	VESA
7	1360*768	47.71	60.01	85.00	VESA(WXGA)
8	1280*1024	63.98	60.02	109.00	VESA(SXGA)	FHD, UHD only
9	1920*1080	67.50	60.00	158.40	WUXGA(CEA 861D)	FHD, UHD only
10	3840*2160	54.00	24.00	297.00	UDTV 2160P	UHD only
11	3840*2160	56.25	25.00	297.00	UDTV 2160P	UHD only
12	3840*2160	67.50	30.00	297.00	UDTV 2160P	UHD only
13	4096*2160	53.95	23.97	296.703	UDTV 2160P	UHD only
14	4096*2160	54.00	24.00	297.00	UDTV 2160P	UHD only

- 8 -	Copyright ©	LG Electronics. Inc. All rights reserved.
	Only for training and service purposes.

5.1.3. HDMI Input (DTV)

No	Resolution	H-freq(kHz)	V-freq(Hz)	Pixel clock(MHz)	Proposed	Remarks
1	640*480	31.46	59.94	25.13	SDTV 480P
2	640*480	31.50	60.00	25.13	SDTV 480P
3	720*480	15.73	59.94	13.50	SDTV, DVD 480I(525I)
4	720*480	15.75	60.00	13.51	SDTV, DVD 480I(525I)	Spec. out but display
5	720*576	15.62	50.00	13.50	SDTV, DVD 576I(625I) 50Hz
6	720*480	31.47	59.94	27.00	SDTV 480P
7	720*480	31.50	60.00	27.03	SDTV 480P
8	720*576	31.25	50.00	27.00	SDTV 576P
9	1280*720	44.96	59.94	74.18	HDTV 720P
10	1280*720	45.00	60.00	74.25	HDTV 720P
11	1280*720	37.50	50.00	74.25	HDTV 720P
12	1920*1080	28.12	50.00	74.25	HDTV 1080I
13	1920*1080	33.72	59.94	74.18	HDTV 1080I
14	1920*1080	33.75	60.00	74.25	HDTV 1080I
15	1920*1080	26.97	23.97	63.30	HDTV 1080P
16	1920*1080	27.00	24.00	63.36	HDTV 1080P
17	1920*1080	33.71	29.97	79.12	HDTV 1080P
18	1920*1080	33.75	30.00	79.20	HDTV 1080P
19	1920*1080	56.25	50.00	148.50	HDTV 1080P
20	1920*1080	67.43	59.94	148.35	HDTV 1080P
21	1920*1080	67.50	60.00	148.50	HDTV 1080P
22	3840*2160	53.95	23.98	297.00	UDTV 2160P	UHD only
23	3840*2160	54.00	24.00	297.00	UDTV 2160P	UHD only
24	3840*2160	56.25	25.00	297.00	UDTV 2160P	UHD only
25	3840*2160	61.43	29.97	297.00	UDTV 2160P	UHD only
26	3840*2160	67.50	30.00	297.00	UDTV 2160P	UHD only
27	3840*2160	112.50	50.00	594.00	UDTV 2160P(DVB)	UHD only
28	3840*2160	134.86	59.94	593.41	UDTV 2160P	UHD only
29	3840*2160	135.00	60.00	594.00	UDTV 2160P	UHD only
30	4096*2160	53.95	23.98	297.00	UDTV 2160P	UHD only
31	4096*2160	54.00	24.00	297.00	UDTV 2160P	UHD only
32	4096*2160	56.25	25.00	297.00	UDTV 2160P	UHD only
33	4096*2160	61.43	29.97	297.00	UDTV 2160P	UHD only
34	4096*2160	67.50	30.00	297.00	UDTV 2160P	UHD only
35	4096*2160	112.50	50.00	594.00	UDTV 2160P(DVB)	UHD only
36	4096*2160	134.86	59.94	593.41	UDTV 2160P	UHD only
37	4096*2160	135.00	60.00	594.00	UDTV 2160P	UHD only

- 9 -	Copyright ©	LG Electronics. Inc. All rights reserved.
	Only for training and service purposes.

5.2. 3D Mode - DTV/HDMI/USB

5.2.1. RF Input

	No.	Resolution	H-freq(kHz)	V-freq(Hz)	Pixel clock(MHz)	Proposed	3D input proposed mode
	1	1280*720	37.50	50	74.25	HDTV 720P	2D to 3D, Side by Side,
							Top & Bottom
	2	1920*1080	28.13	50	74.25	HDTV 1080I	2D to 3D, Side by Side,
							Top & Bottom

- 10 -	Copyright ©	LG Electronics. Inc. All rights reserved.
	Only for training and service purposes.

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.

(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.

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

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

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

- 11 -	Copyright ©	LG Electronics. Inc. All rights reserved.
	Only for training and service purposes.

.reserved rights All .Inc .Electronics LG © Copyright - 12 - .purposes service and training for Only

X_TAL 32.768KHz

	DDR3 2133 X 32	X_TAL
	(512MB X 2EA)
		27MHz
	Hynix 20nm

K3L only. (K3Lp 256MB x 2ea SoC )

	M1	M0	P_TS_IN						CI Slot
			P_TS_OUT
EPI block		B-CAS	SMARTCARD_I/F		B-CAS
					controller
	I2C 6	I2C 4			NVRAM (256Kb)
						eMMC (4GB)
Vx1 51P (8 lane) : LGD 60/65/70/75						Toshiba 15nm
		Realtek
EPI 60Px2 (3G, 6 lane) : LGD 43/49/55	Vx1 / EPI									K3L only
	I2C 6	K3Lp
CEDS 68Px2 (1.5G, 12 lane) : BOE									USB2 (2.0)
			OCP
									USB3 (2.0)
MAIN Audio AMP	I2S Out								HDMI1
									HDMI2(ARC)	HDMI 6G 4
	I2C 4
(DTA2010M)									HDMI3

HDMI4 (EEPROM)

	Sub Micom	WIFIUSB	ETHERNET	CVBS/YPbPr	OUTSPDIF	TS	TS
							T2/C/S2 NIM tuner
		I2C 1
	(RENESAS
	R5F100GEAFB)						Demode
						I2C 2
							(T/C/S/T2/S2)

IR / KEY(1Key)				MAX323		RF IC
			AMP		LNB
LOGO LIGHT(Ready)
					(DT1805)
WIFI/BT Combo						DVB-S	Air/
MTK IC							Cable
	AV/COMP	SPDIF		232-RS
LAN			H/P			REAR(H)

Sub Assy

DIAGRAM BLOCK (External) Diagram Block K3Lp .1

2. K3Lp Block Diagram (Internal)

- 13 -	Copyright ©	LG Electronics. Inc. All rights reserved.
	Only for training and service purposes.

.reserved rights All .Inc .Electronics LG © Copyright - 14 - .purposes service and training for Only

		BOE Panel			/ EPI .3
K3Lp			LGD Panel		CEDS
		3840x2160@60p
			3840x2160@60p
		1.5Gbps
			3Gbps
					Block
[GPIO_5_VBY_LOCK/EPLOCK]	LOCKOUT12
	CEDS/EPI 6Lane 68Pin				Diagram
[GPIO_1_TCON_SDA/TCON_5]	BOE Only	(2, 3,	EPI 3Lane	60P
[EPI_TX12~EPI_TX23]
[GPIO_2_TCON_SCL/TCON_9]	GAMMA
	(RT6508)	GMA
	11, 12,		68pin		60pin
	Boost/Buck
	(RT5043A)	SWG	VCOMRFB
		SWO
		SWI	RST
[GPIO019_DAC_OUT]
[GPIO_0_DAC_SCLK]	GST, E/O, MCLK, GLCK	PMIC	GL
			EVEN
[GPIO_4_VBY_HTPD/TCON_14]		&	ODD
[GPO_1_TCON_I2C_EN/TCON_2]		Level Shifter	A
	PMIC_RESET
		SW50B3A(LGD)
[GPIO7_PMIC_RESET]			13, 24,18)
		SW5253(BOE)

[EPI_TX12~EPI_TX23]	CEDS/EPI 6Lane 68pin

EPI 3Lane 60P

	[GPIO_5_VBY_LOCK/EPLOCK]	LOCKAn_IN
		HTPDAn_IN
	[GPIO_4_VBY_HTPD/TCON_14]

60pin

68pin

.reserved rights All .Inc .Electronics LG © Copyright - 15 - .purposes service and training for Only

17Y Tuner	[B1_+3.3V_RF] 3
	[+3.3V_DEMOD_TU] 11
	[B3_+1.2V_DEMOD] 13

[LNB_TX1] 12 [LNB] 26(Full NIM) / [LNB] 26(Half NIM)

[SCL_RF] 1

[SDA_RF] 2

[SCL_DEMOD] 36 [SDA_DEMOD] 35

[M_ERROR] 14 [M_MCLK] 15 [M_SYNC] 16 [M_VALID] 17

FE_DEMOD1_TS_DATA[0-7] 18-25

TU_JAPAN

[/TU_RESET1_TU] 10

[IF_S_IP_MAIN] 59 [IF_S_IN_MAIN] 60 [IF_S_QP_MAIN] 62 [IF_S_QN_MAIN] 61

[IF_P_TU] 8

[IF_N_TU] 7

[TU_SIF] 6 [TU_CVBS_TU] 4 [IF_AGC_TU] 5

+3.3V_NORMAL

+ DEMOD_CORE

+3.3V_NORMAL

1.8K ȳ

33 ȳ

LNB_TX LNB_OUT

33 ȳ

I2C_SCL2

33 ȳ TU_JP

FE_DEMOD1_TS_ERROR

FE_DEMOD1_TS_CLK

FE_DEMOD1_TS_SYNC

FE_DEMOD1_TS_VAL

FE_DEMOD1_TS_DATA [0-7]

FE_DEMOD2_TS_ERROR

FE_DEMOD1_TS_1_DATA[4]

FE_DEMOD1_TS_1_DATA[3]

FE_DEMOD1_TS_1_DATA[2]

FE_DEMOD1_TS_1_DATA[1]

+2.5V_Normal

/TU_RESET2

/TU_RESET1 JAPAN_OPT

IF_S_IP

IF_S_IN

IF_S_QP

IF_S_QN

IF_P

IF_N

TUNER_SIF (OPT : TU_EXT_ATV)

TU_CVBS (OPT : TU_EXT_ATV)

IF_AGC

5	[SCL]	LNB
6	[SDA]
		IC7001
8	[TONECTRL]
		DT1805
2	[LNB]
	AA5 / Y4 [GPIO52_TUNER0_SCL]
	AA6 / AA4 [GPIO51_TUNER0_SDA]
	AF4 [GP O54_TUNER1 _SCL]		Re	d f D l T r y K3L
	AF5 [G P O53_TUNER1 SDA]

AB5 / AB2 [GPIO57_TP0_CLK]

AB6 / AA3 [GPIO56_TP0_SYC]

AB4 / AC2 [GPIO58_TP0_VAL]

[GPIO59~66_TP0_D0~TP0_D7]

K3Lp

RTK

AA3 / M2 [VINGP_DEMOD_RESET]

AB2 / L1 [VINRP_TUNER0_REST]

AF3 / W2 [IP_1]

AG1 / W3 [IN_1]

AG2 / Y2 [QP_2]

AG3 / Y3 [QN_2]

AE1 / U2 [IF_P]

AE2 / U3 [IF_N]

AE3 / V2 [SIF]

Y5 / R5 [VIN10P]

Y4 / W4 [GPIO55_RF_IF_AGC1]

Tuner .4

.reserved rights All .Inc .Electronics LG © Copyright - 16 - .purposes service and training for Only

AV/COMP

AV1_CVBS_DET COMP1/AV1/DVI_L_IN COMP1/AV1/DVI_R_IN

COMP1_Pb

COMP1_Pr

COMP1_Y/CVBS

COMP1_DET

TU_SIF

Tuner

[H5] AIO1L_AV1_CVBS_DET [M5] AI1L

[M4] AI1R GPIO_6_SPDIF_OUT_0 [E3]

[N3] VIN 3P

[P3] VIN 5P

[P2] VIN 4P

[H4] AI3R_COMP1_DETGPIO021_SCLK[C2]

GPO_0_I2S_WCLK/SPDIF_OUT_1[D13]

GPIO15_D0 [B3]

AI2R_AMP_SDA [G4]

AI3L_AMP_SCL [G5]

AI2L_AMP_RESET_N [F5]

Realtek

K3Lp

[V2] SIF

GPIO_35_HPOL [N5]

GPIO_36_HPOR [N4]

AIO2L_HP_DET[J5]

ST_GPIO_23_H0_ARC[AG13]

SPDIF_OUT

SPDIF

AUD_SCK	[38] CLK_I
AUD_LRCK
	[8] WCK
AUD_LRCH
	[7] SDATA		[30, 33]
I2C_SDA/SCL_AMP	[10,11]	MAIN AMP
AMP_RESET_N		DTA2010M
	[36]	(IC5800)
	[12]		[18, 21]

AMP_MUTE

22

MICOM

	26
	SIDE_HP_MUTE
	H/P AMP	HP_LOUT_AMP
HP_L/ROUT		HP_ROUT_AMP
	TPA6138A2

(IC6300)				LPF
				HP_DET
HDMI_ARC				HDMI2

	SPK_L+ / L-
LPF				SPK L
	SPK_R+ / R-
LPF				SPK R

H/P Jack

IN/OUT Audio & Video .5

.reserved rights All .Inc .Electronics LG © Copyright - 17 - .purposes service and training for Only

REALTEK

K3Lp

ST_GPIO_19_5V_DET_HDMI_0 ST_GPIO_18_H0_HPD ST_GPIO_21_H0_SCL ST_GPIO_20_H0_SDA

P0_CKN/P_RGB_N/P

ST_GPIO_15_5V_DET_HDMI_1 ST_GPIO_14_H1_HPD ST_GPIO_17_H1_SCL ST_GPIO_16_H1_SDA

ST_GPIO_23_H0_ARC

P1_CKN/P_RGB_N/P

ST_GPIO_10_5V_DET_HDMI_2 ST_GPIO_11_H2_HPD ST_GPIO_13_H2_SCL ST_GPIO_12_H2_SDA

P2_CKN/P_RGB_N/P

ST_GPIO_07_5V_DET_HDMI_3 ST_GPIO_06_H3_HPD ST_GPIO_09_H3_SCL ST_GPIO_08_H3_SDA

P3_CKN/P_RGB_N/P

HDMI2.0_1_5V_DET

HDMI2.0_1_HPD

DDC_SCL1 / DDC_SDA1

TMDS1 - D0/D1/D2/CLK

HDMI_CEC

HDMI2.0_2_5V_DET

HDMI2.0_2_HPD

DDC_SCL2 / DDC_SDA2

HDMI_ARC

TMDS2 - D0/D1/D2/CLK

HDMI_CEC

HDMI2.0_3_5V_DET

HDMI2.0_3_HPD

DDC_SCL3 / DDC_SDA3

TMDS3 - D0/D1/D2/CLK

HDMI_CEC

HDMI2.0_4_5V_DET

HDMI2.0_4_HPD

DDC_SCL4 / DDC_SDA4

TMDS4 - D0/D1/D2/CLK

MICOM

R5F100GEAFB

(IC3000)

HDMI1

HDMI2 with ARC

HDMI3

HDMI4

Block 0.2 HDMI .6

.reserved rights All .Inc .Electronics LG © Copyright - 18 - .purposes service and training for Only

	USB_OCD3 [AG22]		+5V_USB2.0_3
		DCDC OCP
	USB_CTL3 [AH19]	BD2242G
		(IC4700)

USB_OCD2 [AJ18]

USB_CTL2 [AG20]

HSDM1[AM24]

HSDP1[AL24]

HSDM2[AM25]

HSDP2[AL25]

Realtek	HSDM0 [G1]
K3Lp	HSDP0 [G2]

DEBUG UART	DEBUG_RX / TX	[AH5] ST_GPIO_02_VGA_SDA
Wafer		[AG5] ST_GPIO_01_VGA_SCL
(P201)

ST_GPIO_25_UART0/1[AH13]

ST_GPIO_24_UART0/1[AG14]

DCDC OCP +5V_USB2.0_2 BD2242G

(IC4501)

USB2.0_2_DM / DP

USB2.0_3_DM / DP

WIFI_DM / DP

SOC_RX / TX

USB1

USB2

5

7

Wafer 9 (P4000)1019

20

23

24

WOL/WIFI_POWER_ON BT_RESET BT_WAKEUP_DEVICE BT_WAKEUP_HOST IR

LED_R

KEY2

KEY1

PHONE JACK

RS232C
(IC7200)	DOUT1

		RIN1
	Wafer
	(P200)		MICOM
	SOC_RX / TX		R5F100GEAFB
			(IC3000)

UART(Debug) / REMOTE-M / WIFI / USB .7

8. K3Lp I2C Map

	DTA2010M AMP							FT24C256A-ESR-T NVRAM
		100ȳ						33 ȳ

								NOR
					8k.1ȳ
								_
								+3.3V
					8k.1ȳ
	I2C SCL4		I2C SDA4
	[AI3L AMP SCL]		[AI2R AMP SDA]
						K3Lp
2 TCON SCL/TC 1 TCON SDA/TC
[GPIO ON 9] [GPIO ON 5]
I2C SCL6 I2C SDA6
				NOR
	8k.1ȳ
				_
				+3.3V
	8k.1ȳ

		33 ȳ
/ CEDS only	SW50B3A(LGD) SW5253A(BOE) EPI PMIC
EPI

	DT1805 LNB							TDJN-G501D TUNER
		33 ȳ					33 ȳ

			NOR
	8.1kȳ
			_
			+3.3V
	8.1kȳ

I2C SCL2	I2C SDA2
[GPIO52 TUNER0 SCL] [GPIO51 TUNER0 SDA]
[ST GPIO 27 MICRO SCL]	[ST GPIO 26 MICRO SDA]
I2C SCL 1	I2C SDA 1

			ST
	8k.1ȳ
			+3.5V
	8k.1ȳ

MICOM

R5F100GEAFB#30 33 ȳ

- 19 -	Copyright ©	LG Electronics. Inc. All rights reserved.
	Only for training and service purposes.

.reserved rights All .Inc .Electronics LG © Copyright - 20 - .purposes service and training for Only

MICOM

HW option ADC 1~5

CI_SLOT

Panel

PMIC

POWER

	INSTANT_BOOT [ST_GPIO_00_WOL_WAKE_UP]
	WOL/ETH_POWER_ON		[ST_GPIO_05_IR_RX]
		SOC_RESET	[RST]
		BIT0~4	[AH16,AH17,AG16,AG17,AJ16]		[VINBN_VIDCORE] VID_CORE
						/TU_RESET1
					[VINRP_TUNER0_REST]
						/TU_RESET2
					[VINGP_DEMOD_RESET]
					[AI2L_AMP_RESET_N]	AMP_RESET_N
		PCM_RESET	[GPIO_119_PC_RST]
		PCM_5V_CTL
	CI power		[AIO2R_CMD_VCC_SC]			COMP1_DET
	enable control				[AI3R_COMP1_DET]
						AV1_CVBS_DET
					[AIO1L_AV1_CVBS_DET]
		LOCKAn		K3Lp
			[GPIO_5_VBY_LOCK/EPLOCK]		[AIO2L_HP_DET]	HP_DET
					[VDBSOUT_SC_PWR_SEL]	SMARTCARD_PWR_SEL
		EPI_GCLK	[GPO_1_TCON_I2C_EN/TCON_2]
		EPI_MCLK
			[GPIO_4_VBY_HTPD/TCON_14]
		PMIC_RESET	[GPIO7_PMIC_RESET]

CORE DCDC

Tuner

Audio AMP

Component/AV Jack

H/P Jack

Japan B-CAS

PWM_DIM

PWM_DIM2

L/DIM_M0_SCLK L/DIM_M0_MOSI L/DIM_M0_VS

[GPIO010_PWM_DIM_0] [GPO011_PWM_DIM_1] [GPO012_LD_SPI1_SCK]

[GPO013_LD_SPI1_SDO]

[GPO014_LD_SPI1_SYNC]

[GPIO_79_USB_PWR0_SD_WP]	USB_CTL2
			USB2_2.0 OCP		USB2
[RTC_XO_USBOCD0]	/USB_OCD2
[GPIO_78_USB_PWR1_SD_CD]	USB_CTL3
			USB3_2.0 OCP		USB3
[RTC_XI_USBOCD1]	/USB_OCD3

GPIO(K3Lp) .9

.reserved rights All .Inc .Electronics LG © Copyright - 21 - .purposes service and training for Only

RTK ˀ K3L

IC100

RS232C

CONTROL I/F

IC7200

AMP

IC5800

DTA2010M

1.0V DCDC Eth STDBY

IC2307

TLV62565DBVR

HP AMP

IC6300

TPA6138A2

RESET IC

IC1300

HDMI 1 / 2 / 3 /4

JK3101/JK3102/JK3103/JK3104

POWER WAFER

P1001

IR / KEY/WIFI/BT

P4000

GND +3.5V WIFI

GND +13V TO PANEL_VCC

I2C_SCL_MICOM / I2C_SDA_MICOM

POWER_ON/OFF1

13V-5V NORMAL DCDC

3.3V NORMAL DCDC

1 [P60/SCLA0] / 2 [P61/SDAA0]

[P17/TI02/TO02] 15

IC2500

IC2300

WOL/ETH_POWER_ON

TPS564208

TPS563208

13 [P50//INTP1/SI11/SDA11]

1.5V DCDC

SOC_RESET

18 [P14/RXD2/SI20/SDA20]

INSTANT_BOOT

35 [P00/TI00/TXD1]

[P01/TO00/RXD1] 34

POWER_ON/OFF2_4

IC2303

33 [P130]

SYVL83

SYSTEM_DEBUG

POWER_ON/OFF2_3

0.95V CORE/CPU DCDC

1.8V eMMC LDO

1.2V Demod LDO

[P72/KR2/SO21] 9

IC2302

IC2301

IC6900

SOC_RX/TX

20 [P12/SO00/TXD0/TOOLTXD]

TPS51362RVER

TJ4320GDP-ADJ

TJ4320GDP-ADJ

AMP_MUTE

21 [P11/SI00/RXD0/TOOLRXD/SDA00]

22 [P10/SCK00/SCL00]

[P25/ANI5] 27

OPT0 NON LOGO LCD/LOGO LCD

NON LOGO OLED/LOGO OLED

[P24/ANI4] 28

MODEL1_OPT_0/1/2/ 3

OPT1 TV-NON EPI/BOX/TV EPI/BOX

WOL_CTL

[P23/ANI3] 29

17 [P15/PCLBUZ1/SCK20/SCL20]

OTP2 RESERVED/ RESERVED/9_KEY/9_KEY_NON

[P22/ANI2] 30

OPT3 M16/RTK/H15

SIDE_HP_MUTE

26 [P26/ANI6]

MICOM_DEBUG

[P40/TOOL0] 39

MICOM DEBUG 4P

MICOM_RESET

P3000

[RESET] 40

12507WS-04L

POWER_DET

14 [P51/INTP2/SO11]

[P124/XT2/EXCLKS] 41

MICOM X-TAL

X3000

[P123/XT1] 42

32.768KHz

HDMI_CEC

7 [P74/KR4/INTP8/SI01/SDA01]

EWBS_TUNER

INV_CTL

4 [P63]

[P16/TI01/TO01/INTP5] 16

EWBS_TU

MODE_SELECT_PWM1

5 [P31/TI/03/TO03/INTP4]

TUxxxx

36 [P140/PCLBUZ0/INTP6]

RL_ON

[P146] 23

EDID_WP

HDMI EXT EDID

IC3401

IR

6 [P75/KR5/INTP9/SCK01/SCL01]

BR24G02FJ

EYE_SCL / EYE_SDA

10 [P71/KR1/SI21/SDA21] / 11 [P70/KR0/SIK21/SCL21]

AM_MODE_DET_OLED

BT_WAKEUP_DEVICE

8 [P73/KR3/SO01]

[P137/INTP0] 43

WOL/WIFI_POWER_ON

12 [P30/INTP3/RTC1HZ/SCK11/SCL11]]

[P122/X2/EXCLK] 44

T_CON_SYS_POWER_OFF_OLED

COMBO_RESET

24 [P147/ANI18]

RETENTION_DISABLE

BT_WAKEUP_HOST

25 [P27/ANI7]

[P121/X1] 45

KEY1 / KEY2

31 [P21/ANI1/AVREFM] / 32 [P20/ANI0/AVREFP]

3D&L_DIM_EN

LED_R

38 [P41/TI07/TO07]

[P62] 3

51P VX1 Wafer

WIFI_EN

37 [P120/ANI19]

* Depending on Model

		19 [P13/TXD2/SDA20]
	PANEL_CTL

RENESAS) – GPIO(MICOM .10

.reserved rights All .Inc .Electronics LG © Copyright - 22 - .purposes service and training for Only

K3L_DDR_0_ADDR_[0:14]		DDR3 IC400		DDR3 IC401
DC1_A [0:14]		A[0:14]		A[0:14]
DC1_CSB	K3L_DDR_0_CON_CS 0	~CS	K3L_DDR_0_CON_CS 1
DC1_CSB_1				~CS
	K3L_DDR_0_CON_BA[
DC1_BA [0:2]		BA[0:2]		BA[0:2]
	0:2]
DC1_CLK / CLKB K3L_DDR_0_CLK_ P/N		CK / ~CK		CK / ~CK

		DC1_CKE K3L_DDR_0_CON_CKE
	K3Lp
		DC1_ODT K3L_DDR_0_CON_ODT
		K3L_DDR_0_CON_RA
		DC1_RAS / CAS SN /CASN
		DC1_WEK3L_DDR_0_CON_WEN

K3L_DDR_0_DQS_0_P/N

DC1_DQS0 / DQS0B

K3L_DDR_0_DQS_1_P/N

DC1_DQS1 / DQS1B

DC1_DQS2 / DQS2B

DC1_DQS3 / DQS3B

K3L_DDR_0_DQ [0:15]

DC1_DQ [0:15]

DC1_DQ [16:31]

CKE

ODT

RAS/CAS

WEN

LDQS/~LDQS

UDQS/~UDQS

DQ[0:15]

CKE

ODT

1k ohm

RAS/CAS

WEN

K3L_DDR_0_DQS_2_P/N LDQS/~LDQS

K3L_DDR_0_DQS_3_P/N UDQS/~UDQS

K3L_DDR_0_DQ [16:31] DQ[0:15]

Block DDR .11

.reserved rights All .Inc .Electronics LG © Copyright - 23 - .purposes service and training for Only

		DCDC	LDO	FET
3.5V ST
4A
IC2305
			FET(Q4101)
			L311
			FET(Q203)
			L6504
1V WOL
1A
IC2307
	FET(Q202)		L300
			L302
D13.2V			L305
1.5V DDR
3.5A
IC2303
	L400
	FET(Q201)		L303
			0.75V, 1.5A
			IC410
D1V0
10A
IC2302
L1100	FET(Q1101)	Panel_VCC

MICOM

IR h ˅

RS-232

WiFi Module

SoC(STB3V3_1)

SoC(STB3V3_2)

Tuner(+3.5V_ST)

SoC(Ethernet)

SoC(USB1V0)

SoC(LV1V0)

SoC(HDRX1V0)

SoC(DDR)

DDR3(IC401)

DDR3(IC402)

SoC(LV1V5_1~2)

DDR VTT

SoC(CPU1V0)

SoC(C01V0)

PMIC(IC9200)

SubPMIC(IC9300)

Block Power K3Lp .12

.reserved rights All .Inc .Electronics LG © Copyright - 24 - .purposes service and training for Only

3.3V NORM

3A

IC2300

D13.2V

5V NORM

4A

IC2500

A13.2V

1.8V

2A

IC2301

Demod

Core 2A IC6900

*Japan Only

2.5V

2A

IC6800

	CI Detect
	HP Amp
	NVRAM
	SPDIF OUT
	Pull up
L306	SoC(D3V3,A3V3)
FET(Q302)	SoC(HDRX3V3)
L2305	SoC(EMMC1V8)
	EMMC VCCQ
L2304	EMMC VCC
L5801	Audio Amp
L6401	BCAS
	Tuner Demod
	Tuner 2.5V
L6505	Tuner (+3.3V_TU)
L6503	Tuner (+3.3V_TU)
L7001	Tuner (LNB)
	USB1 OCP
	USB2 OCP
	EDID EEPROM
	CI OCP & CI IF
L6400	BCAS(Japan)
	Audio Amp

Block2 Power K3Lp .13

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

	800
		411
		120
	521
	540
LV2	530
LV1	820	121
		200T
	200

901

902

570 500

200A 700

ARC1

AR1 A10

- 25 -	Copyright ©	LG Electronics. Inc. All rights reserved.
	Only for training and service purposes.

DISASSEMBLY GUIDE

1. Disassemble stand

-rotate and disassemble.

-M4*16 4EA Disassemble screw

- 26 -	Copyright ©	LG Electronics. Inc. All rights reserved.
	Only for training and service purposes.

2. Disassemble screw

M3*10 13EA

M4*10 2EA

M3*5.5 1EA

-put up the back cover.

3. Disassemble screw

M3*5.5 17EA

- 27 -	Copyright ©	LG Electronics. Inc. All rights reserved.
	Only for training and service purposes.

4. Disassemble Bottom Cover, and Wifi PCBA

-put up the Bottom cover.

push

-push side and raise up.

5. Disassemble IR

-pushing red point and pull out side.

- 28 -	Copyright ©	LG Electronics. Inc. All rights reserved.
	Only for training and service purposes.

TROUBLE SHOOTING GUIDE

Copyright © 2017 LG Electronics. Inc. All rights reserved.

Only for training and service purposes.

Contents of Standard Repair Process

No.	Error symptom (High category)	Error symptom (Mid category)	Page	Remarks
1		No video/Normal audio	1
2		No video/No audio	2
3	A. Video error	Picture broken/ Freezing	3
4		Color error	4
5		Vertical/Horizontal bar, residual image,	5
		light spot, external device color error
6		No power	6
	B. Power error
7		Off when on, off while viewing, power	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
		MR15 operating checking	12
11
	D. Function error
12
		Wifi operating checking	13
13		Camera operating checking	14
14		External device recognition error	15
15	E. Noise	Circuit noise, mechanical noise	16
16	F. Exterior error	Exterior defect	17

First of all, Check whether there is SVC Bulletin in GSCS System for these model.

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