LG 55UJ6580 User Manual

Internal Use Only

LED TV

SERVICE MANUAL

CHASSIS : UJ71P/UT71P

MODEL : 55UJ6580 55UJ658T

55UJ6580-SD 55UJ658T-DD

CAUTION

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

P/NO : MFL69761707 (1701-REV00)

CONTENTS

CONTENTS ..............................................................................................	2
SAFETY PRECAUTIONS .........................................................................	3
SERVICING PRECAUTIONS ...................................................................	4
SPECIFICATION........................................................................................	6
SOFTWARE UPDATE ............................................................................	10
BLOCK DIAGRAM .................................................................................	11
EXPLODED VIEW ..................................................................................	12
DISASSEMBLY GUIDE ..........................................................................	13
TROUBLE SHOOTING GUIDE ................................................	APPENDIX

Copyright ©	LG Electronics. Inc. All rights reserved.	- 2 -	LGE Internal Use Only
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

Copyright ©	LG Electronics. Inc. All rights reserved.	- 3 -	LGE Internal Use Only
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.

Copyright ©	LG Electronics. Inc. All rights reserved.	- 4 -	LGE Internal Use Only
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.

Copyright ©	LG Electronics. Inc. All rights reserved.	- 5 -	LGE Internal Use Only
Only for training and service purposes

SPECIFICATION

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

1. Application range					3. Test method
This spec sheet is applied to the LED TV used UJ71P/UT71P					(1) Performance: LGE TV test method followed
chassis					(2) Demanded other specification
						- Safety : CE, IEC specification
2. Test condition						- EMC: CE, IEC
Each part is tested as below without special notice.
(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 (100~240V@ 50/60Hz)
	* Standard Voltage of each products is marked by models.
(4) Specification and performance of each parts are followed
	each drawing and specification by part number in
	accordance with BOM.
(5) The receiver must be operated for about 20 minutes prior
	to the adjustment.
4. Model Specification
(1) - S
No	Item		Specification				Remark
1	Market		Central and South AMERICA
2	Broadcasting system		Digital : SBTVD
			Analog : NTSC / PAL-M / PAL-N
3	Available Channel		BAND		NTSC
			VHF		2 ~ 13
			UHF		14 ~ 69
			DTV		2 ~ 69
			CATV		1 ~ 135
4	Receiving system		Digital : SBTVD /
			Analog : NTSC-M / PAL-M / PAL-N
5	Video Input		NTSC / PAL-M / PAL-N
6	Component Input		Y/Cb/Cr, Y/ Pb/Pr				Rear RCA
7	HDMI Input	HDMI 3	PC / DTV format, Support HDCP2.2
		HDMI 2	PC / DTV format, Support HDCP2.2				Side, Support ARC
		HDMI 1	PC / DTV format, Support HDCP2.2
8	Audio Input		Component / AV Audio / DVI audio				L/R Input ; Rear
							Component and av and DVI use same jack ;
							Rear (Gender)
9	SPDIF out(1EA)		Optical Audio out				Rear (1EA),
10	USB Input(3EA)		EMF, DivX HD, For SVC (download)				Side JPEG, MP3, DivX HD
			USB 2.0 : 2EA
			USB 3.0 :1EA

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

(2) - D

No	Item		Specification			Remark
1	Market		Colmbia/Panama/Taiwan
2	Broadcasting system		Digital : DVB-T			Colombia : DVB-T/T2
			Analog : NTSC / PAL-M / PAL-N			Colombia/Panama
			Analog : NTSC-M			Taiwan
3	Available Channel		BAND		NTSC
			VHF		2 ~ 13
			UHF		14 ~ 69
			DTV		2 ~ 69
			CATV		1 ~ 125
4	Receiving system		Digital : COFDM (DVB-T)/DVB-T2(Colombia)			▪ DVB-T
			Analog : Upper Heterodyne			- Guard Interval(Bitrate_Mbit/s)
						1/4, 1/8, 1/16, 1/32
						- Modulation : Code Rate
						QPSK/16-QAM/64-QAM
						- Code Rate
						1/2, 2/3, 3/4, 5/6, 7/8
						▪ DVB-T2
						- Guard Interval(Bitrate_Mbit/s)
						1/4, 19/256, 1/8, 1/16, 1/32, 1/128
						- Modulation
						QPSK, 16-QAM, 64-QAM, 256QAM
						- Code Rate
						1/2, 3/5, 2/3, 3/4, 4/5, 5/6
5	Video Input		NTSC / PAL-M / PAL-N			Colombia/Panama
			NTSC			Taiwan
6	Component Input		Y/Cb/Cr, Y/ Pb/Pr			Rear RCA
		HDMI 3	DTV format, Support HDCP2.2,			Rear
			PC(HDMI Ver1.4/2.0)
		HDMI 2	DTV format, Support HDCP2.2,			Side, Support ARC
			PC(HDMI Ver1.4/2.0)
		HDMI 1	DTV format, Support HDCP2.2,			Side
			PC(HDMI Ver1.4/2.0)
8	Audio Input		Component / AV Audio / DVI audio			L/R Input : Rear
						Component and AV and DVI use same jack :
						Rear
9	SPDIF out(1EA)		Optical Audio out			Rear (1EA),
10	USB Input(3EA)		EMF, DivX HD, For SVC (download)			Side(1)/Rear(1) : JPEG, MP3, DivX HD
			USB2.0 : 2EA

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

5. External Input Support Format

5.1. Component input(Y, PB, PR)

No	Resolution	H-freq(kHz)	V-freq.(kHz)	Pixel clock	Proposed
1	720*480i	15.73	59.94	13.500	SDTV, DVD 480I(525I)
2	720*480i	15.75	60.00	13.514	SDTV, DVD 480I(525I)
3	720*576i	15.625	50.00	13.500	SDTV, DVD 576I(625I) 50Hz
4	720*480p	31.47	59.94	27.000	SDTV 480P
5	720*480p	31.50	60.00	27.027	SDTV 480P
6	720*576p	31.25	50.00	27.000	SDTV 576P 50Hz
7	1280*720	44.96	59.94	74.176	HDTV 720P
8	1280*720	45.00	60.00	74.250	HDTV 720P
9	1280*720	37.5	50.00	74.250	HDTV 720P 50Hz
10	1920*1080	28.125	50.00	74.250	HDTV 1080I 50Hz,
11	1920*1080	33.72	59.94	74.176	HDTV 1080I
12	1920*1080	33.75	60.00	74.25	HDTV 1080I
13	1920*1080	56.25	50	148.5	HDTV 1080P
14	1920*1080	67.5	60.00	148.5	HDTV 1080P

5.2. HDMI Input (PC)

No.	Resolution	H-freq(kHz)	V-freq.(kHz)	Pixel clock	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	VESA(SVGA)
5	1024*768	48.363	60.00	65	VESA(XGA)
6	1360*768	47.712	60.015	84.75	VESA(WXGA)
7	1152*864	54.348	60.053	80	VESA	Support to HDMI-PC
8	1280*1024	63.981	60.020	109.00	SXGA
9	1920*1080	67.5	60	158.40	WUXGA
					(Reduced Blanking)
10	3840*2160	54	24.00	297.00	UDTV 2160P	Only UHD Model
11	3840*2160	56.25	25.00	297.00	UDTV 2160P	Only UHD Model
12	3840*2160	67.5	30.00	297.00	UDTV 2160P	Only UHD Model
13	4096*2160	53.95	23.97	296.703	UDTV 2160P	Only UHD Model
14	4096*2160	54	24	297	UDTV 2160P	Only UHD Model

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

5.3. HDMI Input (DTV)

	No	Resolution	H-freq(kHz)	V-freq.(Hz)	Pixel	Proposed	Remark
					clock(MHz)
	1	640*480	31.469	59.94	25.125	SDTV 480P
	2	640*480	31.5	60.00	25.125	SDTV 480P
	3	720*480	15.73	59.94	13.500	SDTV, DVD 480I(525I)	Spec. out but display
	4	720*480	15.75	60.00	13.514	SDTV, DVD 480I(525I)
	5	720*576	15.625	50.00	13.500	SDTV, DVD 576I(625I) 50Hz
	6	720*480	31.47	59.94	27	SDTV 480P
	7	720*480	31.5	60.00	27.027	SDTV 480P
	8	720*576	31.25	50.00	27	SDTV 576P (DVB)
	9	1280*720	44.96	59.94	74.176	HDTV 720P
	10	1280*720	45	60.00	74.25	HDTV 720P
	11	1280*720	37.5	50.00	74.25	HDTV 720P(DVB)
	12	1920*1080	28.125	50.00	74.25	HDTV 1080I (DVB)
	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	148.5	HDTV 1080P (DVB)
	20	1920*1080	67.432	59.94	148.350	HDTV 1080P
	21	1920*1080	67.5	60.00	148.50	HDTV 1080P
	22	3840*2160	53.95	23.98	296.703	UDTV 2160P	Only UHD Model
	23	3840*2160	54	24.00	297.00	UDTV 2160P	Only UHD Model
	24	3840*2160	56.25	25.00	297.00	UDTV 2160P	Only UHD Model
	25	3840*2160	61.43	29.97	296.703	UDTV 2160P	Only UHD Model
	26	3840*2160	67.5	30.00	297.00	UDTV 2160P	Only UHD Model
	27	3840*2160	112.5	50.00	594	UDTV 2160P	Only UHD Model
	28	3840*2160	134.86	59.94	593.407	UDTV 2160P	Only UHD Model
	29	3840*2160	135	60.00	594	UDTV 2160P	Only UHD Model
	30	4096*2160	53.95	23.98	296.703	UDTV 2160P	Only UHD Model
	31	4096*2160	54	24.00	297	UDTV 2160P	Only UHD Model
	32	4096*2160	56.25	25.00	297	UDTV 2160P	Only UHD Model
	33	4096*2160	61.43	29.97	296.703	UDTV 2160P	Only UHD Model
	34	4096*2160	67.5	30.00	297	UDTV 2160P	Only UHD Model
	35	4096*2160	112.5	50.00	594	UDTV 2160P	Only UHD Model
	36	4096*2160	134.86	59.94	593.407	UDTV 2160P	Only UHD Model
	37	4096*2160	135	60.00	594	UDTV 2160P	Only UHD Model

Copyright ©	LG Electronics. Inc. All rights reserved.	- 9 -	LGE Internal Use Only
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

(This Function is needed to connect to the internet)

(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

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

<![if ! IE]> <![endif]>training for Only	<![if ! IE]> <![endif]>© Copyright
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	<![if ! IE]> <![endif]>.reserved rights All

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<![endif]>- 11 -

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Air/

R Cable

E

A

R T2

T2/C/ W/O AD

IF+, IF-

SIF

CVBS

P_TS

USB1 (2.0)	OCP
USB2 (2.0)	OCP

HDMI1 HDMI 2.0

HDMI2(ARC) HDMI 2.0

HDMI3 HDMI 2.0

HDMI4 HDMI 2.0

RS232C/HP

CVBS/COMP

OPTIC

LAN

X_TAL 24MHz

I2C 5 Main USB2.0_2_DM1

USB2.0_3_DM0

SoC

PHY3_RX0N

PHY2_RX0N

PHY1_RX0N

PHY0_RX0N

YPbPr AV

SPDIF OUT

ETHERNET

		DDR3 / 2133
		512MB
	M0	DDR3 / 2133
		256MB
	M1
	I2C 4	EEPROM(NVRAM)
		(256Kb)
		eMMC
		(4GB)
		PMIC
	I2C6	GAMMA IC
	EPI 3G/1.5G
	V x 1 2.97Gbps	V x 1(60Hz, 8lane, 2.97Gbps) only
	I2C2

	I2S Out	MAIN AudioAMP
	I2C 0
	USB_WIFI	SUB
		ASSY

	I2C 1	Sub Micom	X_TAL
			32.768KHz

<![if ! IE]>

<![endif]>Diagram Block

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.

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<![if ! IE]> <![endif]>900

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

DISASSEMBLY GUIDE

[Fig.1]

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[Fig.2]

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

[Fig.3]

[Fig.4]

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

[Fig.5]

[Fig.6]

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

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Pull direction

[Fig.7]

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[Fig.8]

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

TROUBLE SHOOTING GUIDE

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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
		auto on/off
8		No audio/Normal video	8
	C. Audio error
9		Wrecked audio/discontinuation/noise	9
10		Remote control & Local switch checking	10
		MR15 operating checking	11
11
	D. Function error
12
		Wifi operating checking	12
13		Camera operating checking	13
14		External device recognition error	14
15	E. Noise	Circuit noise, mechanical noise	15
16	F. Exterior error	Exterior defect	16

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

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