LG 49LF620V-ZB Schematic

		Internal Use Only
North/Latin America	http://aic.lgservice.com
Europe/Africa	http://eic.lgservice.com
Asia/Oceania	http://biz.lgservice.com

LED TV

SERVICE MANUAL

CHASSIS : LD55T

MODEL : 49LF620V 49LF620V-ZB

CAUTION

BEFORE SERVICING THE CHASSIS,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

P/NO : MFL68646113 (1503-REV00)	Printed in Korea

CONTENTS

CONTENTS ..............................................................................................	2
SAFETY PRECAUTIONS .........................................................................	3
SERVICING PRECAUTIONS ...................................................................	4
SPECIFICATION .......................................................................................	6
ADJUSTMENT INSTRUCTION ..............................................................	11
BLOCK DIAGRAM .................................................................................	17
EXPLODED VIEW ..................................................................................	21
SCHEMATIC CIRCUIT DIAGRAM ...........................................	APPENDIX
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 Schematic Diagram and 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 specification is applied to the LED TV used LD55T				1) Performance: LGE TV test method followed
chassis.				2) Demanded other specification
					- Safety : CE, IEC specification
2. Requirement for Test					- EMC : CE, IEC specification
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 5 minutes prior to
	the adjustment.
4. Model General Specification
No.		Item	Specification		Remarks
1		Market	EU(PAL Market-37Countries)		DTV & Analog (Total 37 countries)
					DTV (MPEG2/4, DVB-T) :37 countries
					UK/Italy/Germany/France/Spain/Sweden/Finland/Neth-
					erlands/ Belgium/Luxemburg/ Greece/Denmark/Czech/
					Austria /Hungary/Swiss/Croatia/TurkeyNorway/Slovenia/
					Poland/Ukraine/Portugal/Ireland/Morocco/Latvia/Estonia/
					Lithania/Rumania/Bulgaria/Russia/SlovakiaBosnia/Serbia/
					Albania/Kazakhstan/Belarus
					DTV (MPEG2/4, DVB-T2): 8 countries
					UK/Denmark/Sweden/Finland/Norway/Ireland/Ukraine/
					Kazakhstan
					DTV (MPEG2/4, DVB-C): 37 countries
					UK/Italy/Germany/France/Spain/Sweden/Finland/Nether-
					lands/ Belgium/Luxemburg/ Greece/Denmark/Czech/Aus-
					tria /Hungary/Swiss/Croatia/TurkeyNorway/Slovenia/Poland
					/Ukraine/Portugal/Ireland/Morocco/Latvia/Estonia/Lithania/
					Rumania/Bulgaria/Russia/SlovakiaBosnia/Serbia/Albania/
					Kazakhstan/Belarus
					DTV (MPEG2/4,DVB-S): 29 countries
					Italy/Germany/France/Spain/Netherlands/ Belgium/Luxem-
					burg/Greece/Czech/Austria /Hungary/Swiss/Croatia/Turkey/
					Slovenia/Poland/Portugal/ Morocco/Latvia/Estonia/Lithania/
					Rumania/Bulgaria/Russia/Slovakia/Bosnia/Serbia/Albania/
					Belarus
					Supported satellite : 22 satellites
					HISPASAT 1C/1D, ATLANTIC BIRD 2, NILESAT 101/102,
					ATLANTIC BIRD 3, AMOS 2/3, THOR 5/6, IRIUS 4,
					EUTELSAT-W3A, EUROBIRD 9A, EUTELSAT-W2A,
					HOTBIRD 6/8/9, EUTELSAT-SESAT, ASTRA 1L/H/M/
					KR, ASTRA 3A/3B, BADR 4/6, ASTRA 2D, EUROBIRD 3,
					EUTELSAT-W7, HELLASSAT 2, EXPRESS AM1, TURK-
					SAT 2A/3A, INTERSAT10

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

	No.	Item	Specification		Remarks
			Analogue TV	Analogue TV :
			1) PAL-B/G/D/K/I	(RF) VHF: E2 to E12, UHF : E21 to E69
			2) SECAM-B/G/D/K/I, SECAM L/L’	(CATV) S1 to S20, HYPER: S21 to S47
			Digital TV	Digital TV : VHF, UHF
	2	Broadcasting system	1) DVB-T
			2) DVB-C
			Satellite Digital TV	Satellite TV :
			1) DVB-T/T2	VHF, UHF,
			2) DVB-C	C-Band, Ku-Band
			3) DVB-S/S2
				► 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
			Analog : Upper Heterodyne	16-QAM	: 1/2, 2/5, 2/3, 3/4, 5/6
	3	Receiving system	Digital : COFDM, QAM	64-QAM	: 1/2, 2/5, 2/3, 3/4, 5/6
				256-QAM	: 1/2, 2/5, 2/3, 3/4, 5/6
				► DVB-C
				- Symbolrate : 4.0Msymbols/s to 7.2Msymbols/s
				- Modulation : 16QAM, 64-QAM, 128-QAM and 256-QAM
				► DVB-S/S2
				- symbolrate
				DVB-S2 (8PSK / QPSK) : 2 ~ 45Msymbol/s
				DVB-S (QPSK) : 2 ~ 45Msymbol/s
				- viterbi
				DVB-S mode : 1/2, 2/3, 3/4, 5/6, 7/8
				DVB-S2 mode : 1/2, 2/3, 3/4, 3/5, 4/5, 5/6, 8/9, 9/10
	4	Scart Jack (1EA)	PAL, SECAM	Scart 1 Jack is Full scart and support RF-OUT(analog). EU
				only
		Component & AV	Video Input RCA (PAL, SECAM,	4 System : PAL, SECAM, NTSC, PAL60
	5		NTSC)
		Common port (1EA)
			Component Input (Y/Cb/Cr, Y/Pb/Pr)
	6	HDMI Input (2EA)	HDMI1/2-DTV	Support HDCP
	7	Audio Input (1EA)	Component & AV	Component & AV’s audio input is used by common port.
	8	SDPIF out (1EA)	SPDIF out	LF62/LF57/LF56/LF55 Series
	9	Earphone out (1EA)	Antenna, AV1, AV2, Component,	LF62/LF57/LF56 Series
			HDMI1, HDMI2, USB
	10	USB (1EA)	EMF, DivX HD, For SVC (download)	JPEG, MP3, DivX HD
				CI : UK, Finland, Denmark, Norway, Sweden, Russia, Spain,
			DVB-T	Ireland, Luxemburg, Belgium, Netherland
				CI+ : France(Canal+), Italy(DGTVi)
	11	DVB		CI : Switzerland, Austria, Slovenia, Hungary, Bulgaria
			DVB-C	CI+ : Switzerland(UPC,Cablecom), Netherland(Ziggo),
				Germany(KDG,CWB), Finland(labwise)
			DVB-S	CI + : Germany(Astra HD+ )
	12	Ethernet (1EA)	DLNA(Wired, DMP only)	Only UK T2 Model (LF57/LF56/LF55/LF54) : for MHEG

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

5. Video resolutions (2D)

5.1. Component Input (Y, CB/PB, CR/PR)

No.	Resolution	H-freq(kHz)	V-freq(Hz)	Pixel clock(MHz)	Proposed
1	720*576	15.625	50.00	13.5	SDTV ,DVD 576I
2	720*480	15.73	60.00	13.5135	SDTV ,DVD 480I
3	720*480	15.73	59.94	13.50	SDTV ,DVD 480I
4	720*576	31.25	50.00	27.00	SDTV 576P
5	720*480	31.50	60.00	27.027	SDTV 480P
6	720*480	31.47	59.94	27.00	SDTV 480P
7	1280*720	37.50	50.00	74.25	HDTV 720P
8	1280*720	45.00	60.00	74.25	HDTV 720P
9	1280*720	44.96	59.94	74.176	HDTV 720P
10	1920*1080	28.12	50.00	74.25	HDTV 1080I
11	1920*1080	33.75	60.00	74.25	HDTV 1080I
12	1920*1080	33.72	59.94	74.176	HDTV 1080I
13	1920*1080	56.25	50.00	148.50	HDTV 1080P
14	1920*1080	67.50	60.00	148.50	HDTV 1080P
15	1920*1080	67.43	59.94	148.352	HDTV 1080P
16	1920*1080	27.00	24.00	74.25	HDTV 1080P
17	1920*1080	26.97	23.94	74.176	HDTV 1080P
18	1920*1080	33.75	30.00	74.25	HDTV 1080P
19	1920*1080	33.71	29.97	74.176	HDTV 1080P

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

5.2. HDMI Input(PC/DTV)

No.		Resolution	H-freq(kHz)	V-freq.(Hz)	Pixel clock(MHz)	Proposed		Remark
PC(DVI)						DDC
1		640*350	31.468	70.09	25.17	EGA	X
2		720*400	31.469	70.08	28.32	DOS	O
3		640*480	31.469	59.94	25.17	VESA(VGA)	O
4		800*600	37.879	60.31	40.00	VESA(SVGA)	O
5		1024*768	48.363	60.00	65.00	VESA(XGA)	O
6		1152*864	54.348	60.053	80.00	VESA	O
7		1360*768	47.712	60.015	85.50	VESA (WXGA)	O
8		1280*1024	63.981	60.020	108.0	VESA (SXGA)	O	FHD only
9		1920*1080	67.50	60.00	148.5	HDTV 1080P	O	FHD only
DTV
1		640*480	31.46	59.94	25.125	SDTV 480P
2		640*480	31.50	60.00	25.125	SDTV 480P
3		720*480	31.47	59.94	27.00	SDTV 480P
4		720*480	31.50	60.00	27.027	SDTV 480P
5		720*576	31.25	50.00	27.00	SDTV 576P(DVB)
6		1280*720	37.50	50.00	74.25	HDTV 720P(DVB)
7		1280*720	45.00	60.00	74.25	HDTV 720P
8		1280*720	44.96	59.94	74.176	HDTV 720P
9		1920*1080	28.12	50.00	74.25	HDTV 1080I(DVB)
10		1920*1080	33.75	60.00	74.25	HDTV 1080I
11		1920*1080	33.72	59.94	74.176	HDTV 1080I
12		1920*1080	56.25	50.00	148.50	HDTV 1080P(DVB)
13		1920*1080	67.50	60.00	148.50	HDTV 1080P
14		1920*1080	67.43	59.94	148.35	HDTV 1080P
15		1920*1080	27.00	24.00	74.25	HDTV 1080P
16		1920*1080	26.97	23.97	74.175	HDTV 1080P
17		1920*1080	33.75	30.00	74.25	HDTV 1080P
18		1920*1080	33.71	29.97	74.175	HDTV 1080P

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

6. Video resolutions (3D)

6.1. HDMI 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	Side by Side(half), Top and Bottom,
	2	1280*720	45	60	74.25	HDTV 720P	Side by Side(half), Top and Bottom,
	3	1280*720	75	50	148.5	HDTV 720P	Frame packing
	4	1280*720	89.90 / 90	59.94 / 60	148.35/148.5	HDTV 720P	Frame packing
	5	1920*1080	28.12	50	74.25	HDTV 1080i	Side by Side(half), Top and Bottom
	6	1920*1080	33.70	60	74.25	HDTV 1080i	Side by Side(half), Top and Bottom
	7	1920*1080	27.00	24	74.25	HDTV 1080P	Side by Side(half), Top and Bottom,
	8	1920*1080	33.70	30	89.1	HDTV 1080P	Side by Side(half), Top and Bottom
	9	1920*1080	53.95 / 54	23.98 / 24	148.35/148.5	HDTV 1080P	Frame packing
	10	1920*1080	56.30	50	148.5	HDTV 1080P	Side by Side(half), Top and bottom,
							Single frame sequential
	11	1920*1080	67.50	60	148.5	HDTV 1080P	Side by Side(half), Top and bottom,
							Single frame sequential

6.2. DTV Input

No.	Resolution	H-freq(kHz)	V-freq.(Hz)	Pixel clock(MHz)	Proposed	3D input proposed mode
1.	1280*720	37.500	50	74.25	HDTV 720P	Side by Side, Top & Bottom
2.	1920*1080	28.125	50	74.25	HDTV 1080I	Side by Side, Top & Bottom

6.3. USB Input

	No.	Resolution	H-freq(kHz)	V-freq.(Hz)	Pixel clock(MHz)	Proposed	3D input proposed mode
	1.	1920*1080	33.75	30	74.25	HDTV 1080P	Side by Side, Top & Bottom,JPS,
							MPO(Photo)

6.4. 3D Input mode

No.

Side by Side

Top & Bottom

Single Frame Sequential

Frame Packing

1

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

ADJUSTMENT INSTRUCTION

1. Application Range

This specification sheet is applied to all of the LED TV with LD55T chassis.

2.Designation

(1)The adjustment is according to the order which is designated and which must be followed, according to the plan which can be changed only on agreeing.

(2)Power adjustment : Free Voltage.

(3)Magnetic Field Condition: Nil.

(4)Input signal Unit: Product Specification Standard.

(5)Reserve after operation : Above 5 Minutes (Heat Run) Temperature : at 25 °C ± 5 °C

Relative humidity : 65 ± 10 % Input voltage : 220 V, 60 Hz

(6)Adjustment equipments: Color Analyzer(CA-210 or CA-110), DDC Adjustment Jig, Service remote control.

(7)Push the "IN STOP" key - For memory initialization.

Case1 : Software version up

1.After downloading S/W by USB , TV set will reboot automatically.

2.Push “In-stop” key.

3.Push “Power on” key.

4.Function inspection

5.After function inspection, Push “In-stop” key. Case2 : Function check at the assembly line

1.When TV set is entering on the assembly line, Push

“In-stop” key at first.

2.Push “Power on” key for turning it on.

→If you push “Power on” key, TV set will recover

channel information by itself.

3.After function inspection, Push “In-stop” key.

3.Main PCB check process

▪APC - After Manual-Insert, executing APC

*Boot file Download

(1)Execute ISP program "Mstar ISP Utility" and then click "Config" tab.

(2)Set as below, and then click "Auto Detect" and check "OK" message.

If "Error" is displayed, check connection between computer, jig, and set.

(3)Click "Read" tab, and then load download file(XXXX.bin) by clicking "Read".

(1)

filexxx.bin

(4)Click "Connect" tab. If "Can't" is displayed, check connection between computer, jig, and set.

(2) (3)

Please Check the Speed : To use speed between from 200KHz to 400KHz

(5)Click "Auto" tab and set as below.

(6)Click "Run".

(7)After downloading, check "OK" message.

(4)

filexxx.bin

(5)

(7)...........

OK

(6)

*USB DOWNLOAD

(1)Put the USB Stick to the USB socket.

(2)Automatically detecting update file in USB Stick.

-If your downloaded program version in USB Stick is Low, it didn't work. But your downloaded version is High, USB data is automatically detecting.

(3)Show the message "Copying files from memory".

(4)Updating is starting.

(5)Updating Completed, The TV will restart automatically in 5 seconds.

(6)If your TV is turned on, check your updated version and Tool option. (explain the Tool option, next stage)

*If downloading version is more high than your TV have, TV can lost all channel data. In this case, you have to channel recover. if all channel data is cleared, you didn’t have a DTV/ ATV test on production line.

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

*After downloading, have to adjust Tool Option again.

(1)Push "IN-START" key in service remote control.

(2)Select "Tool Option 1" and push "OK" key.

(3)Punch in the number. (Each model has their number)

(4)Completed selecting Tool option.

	MODEL	Tool	Tool	Tool	Tool	Tool	Tool
		Option1	Option2	Option3	Option4	Option5	Option6
	42LF620V-ZB	107	2503	6850	50528	1538	2320

3.1. ADC Process(Optional)

*If ADC processes as OTP, There is no need to proceed internal ADC.

-Enter Service Mode by pushing "ADJ" key,

-Enter Internal ADC mode by pushing "►" key at "8. ADC

Calibration".

EZ ADJUST

0.	Tool Option1
1.	Tool Option2
2.	Tool Option3
3.	Tool Option4
4.	Tool Option5
5.	Tool Option6l

6. Country Group
7. Area Option
8.ADC Calibration	►

9.White Balance

10.10 Point WB

11.Test Pattern

12EDID D/L

13.Sub B/C

14.Ext. Input Adjust

ADC Calibration

ADC Comp 480i						OK
ADC Comp 1080p						OK
ADC Type			◄		OTP			►
	Start			Reset

<Caution> Using "P-ONLY" key of the Adjustment remote control, power on TV.

* ADC Calibration Protocol (RS232)

No.	Item	CMD 1	CMD 2	Data 0
Enter Adjust	Adjust	A	A	0	0	When transfer the ‘Mode In’,
MODE	‘Mode In’					Carry the command.
ADC adjust	ADC	A	D	1	0	Automatically adjustment
	Adjust					(The use of a internal pattern)

Adjust Sequence

▪aa 00 00 [Enter Adjust Mode]

▪xb 00 40 [Component Input]

▪ad 00 10 [Adjust 480i & 1080p Comp]

▪aa 00 90 End Adjust mode

* Required equipment : Adjustment remote control.

3.2. EDID Download

▪After enter Service Mode by pushing "ADJ" key.

▪Enter EDID D/L menu.

▪Enter "START" by pushing "OK" key.

EZ ADJUST				EDID D/L
0. Tool Option1			HDMI1			NG
1. Tool Option2			HDMI2			NG
2. Tool Option3
3. Tool Option4				Start		Reset
4. Tool Option5
5. Tool Option6
6. Country Group
7. Area Option
8. ADC Calibration
9. White Balance
10. 10 Point WB
11. Test Pattern
12. EDID D/L	►
13. Sub B/C
14. Ext. Input Adjust

<Caution> Never connect HDMI cable when EDID downloaded.

3.3.EDID data

(1)3D FHD Model HDMI EDID data

	0		1	2	3	4	5	6		7	8	9	A		B	C	D		E	F
00	00		FF	FF	FF	FF	FF	FF		00	1E	6D		a				b
10		c		01	03	80	A0	5A		78	0A	EE	91		A3	54	4C		99	26
20	0F		50	54	A1	08	00	31		40	45	40	61		40	71	40		81	80
30	01		01	01	01	01	01	02		3A	80	18	71		38	2D	40		58	2C
40	45		00	A0	5A	00	00	00		1E	66	21	50		B0	51	00		1B	30
50	40		70	36	00	A0	5A	00		00	00	1E	00		00	00	FD		00	3A
60	3E		1E	53	10	00	0A	20		20	20	20	20		20			d
70									d										01	e
80	02		03	33	F1	4E	10	9F		04	13	05	14		03	02	12		20	21
90	22		15	01	26	15	07	50		09	57	07					f
A0		f		20	C0	0E	01	40		0A	0F	08	10		18	10	98		10	58
B0	10		38	10	01	1D	80	18		71	1C	16	20		58	2C	25		00	20
C0	C2		31	00	00	9E	01	1D		00	72	51	D0		1E	20	6E		28	55
D0	00		20	C2	31	00	00	1E		02	3A	80	18		71	38	2D		40	58
E0	2C		45	00	A0	5A	00	00		00	1E	01	1D		00	BC	52		D0	1E
F0	20		B8	28	55	40	C4	8E		21	00	00	1E		00	00	00		00	e

(2) Detail EDID Options are below a. Product ID

MODEL NAME	HEX	EDID Table	DDC Function
HD/FHD Model	0001	01 00	Analog/Digital

b. Serial No: Controlled on production line. c. Month, Year:

ex) Week : '01' -> '01' Year : '2015' -> '19' fix

d. Model Name(Hex):

cf) TV set’s model name in EDID data is below.

				MODEL NAME(HEX)
LG TV	00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 (LG TV)
e. Checksum: Changeable by total EDID data.
		EDID C/S data			FHD
					HDMI
		Check sum		Block 0	40
					23 (HDMI1)
		(Hex)		Block 1
					13 (HDMI2)
f. Vendor Specific
		INPUT		Model name(HEX)
		HDMI1		78 03 0C 00 10 00 80 1E
		HDMI2		78 03 0C 00 20 00 80 1E

3.4. Function Check

-Check display and sound

■Check Input and Signal items.

1)TV

2)AV (SCART / CVBS)

3)COMPONENT (480i)

4)HDMI

* Display and Sound check is executed by Remote control.

<Caution>

Not to push the INSTOP key after completion if the function inspection.

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

4. Total Assembly line process

4.1. White Balance adjustment

▪ W/B Equipment condition

CA210 : LED → CH14, Test signal: Inner pattern(80IRE)

▪ Above 5 minutes H/run in the inner pattern. (“power on” key of adjust remote control)

▪ If it is executed W/B adjustment in 2~3 minutes H/run, it is adjusted by Target data.

	Mode	Temp	Coordinate spec	Target
	Cool	13,000 K	X=0.271 (± 0.002)	X=0.278
			Y=0.270 (± 0.002)	Y=0.280
	Medium	9,300 K	X=0.286 (± 0.002)	X=0.293
			Y=0.289 (± 0.002)	Y=0.299
	Warm	6,500 K	X=0.313 (± 0.002)	X=0.320
			Y=0.329 (± 0.002)	Y=0.339

▪ Normal line(LGD/CMI, March ~ December for Gumi, Global)

		Aging time	Cool		Medium		Warm
	NetCase5		x	y	x	y	x	y
		(Min)
			271	270	286	289	313	329
	1	0-2	282	289	297	308	324	348
	2	3-5	281	287	296	306	323	346
	3	6-9	279	284	294	303	321	343
	4	10-19	277	280	292	299	319	339
	5	20-35	275	277	290	296	317	336
	6	36-49	274	274	289	293	316	333
	7	50-79	273	272	288	291	315	331
	8	80-119	272	271	287	290	314	330
	9	Over 120	271	270	286	289	313	329

▪ Normal line(LGD/CMI, January ~ February for Gumi, Apply not Cinema Screen)

		Aging time	Cool		Medium		Warm
	NetCase5		x	y	x	y	x	y
		(Min)
			271	270	286	289	313	329
	1	0-2	286	295	301	314	328	354
	2	3-5	284	290	299	309	326	349
	3	6-9	282	287	297	306	324	346
	4	10-19	279	283	294	302	321	342
	5	20-35	276	278	291	297	318	337
	6	36-49	274	275	289	294	316	334
	7	50-79	273	272	288	291	315	331
	8	80-119	272	271	287	290	314	330
	9	Over 120	271	270	286	289	313	329
	▪ Aging chamber(LGD/CMI)
		Aging time	Cool		Medium		Warm
	NetCase4		x	y	x	y	x	y
		(Min)
			271	270	285	293	313	329
	1	0-5	280	285	294	308	319	340
	2	6-10	276	280	290	303	315	335
	3	11-20	272	275	286	298	311	330
	4	21-30	269	272	283	295	308	327
	5	31-40	267	268	281	291	306	323
	6	41-50	266	265	280	288	305	320
	7	51-80	265	263	279	286	304	318
	8	81-119	264	261	278	284	303	316
	9	Over 120	264	260	278	283	303	315

▪ Use only AUO/Sharp/CSOT(Cool temp Spec is 13000 K)

Cool

Medium

Warm

x

y

x

y

x

y

spec

271

270

286

289

313

329

target

278

280

293

299

320

339

▪ W/B information

Model information

W/B information

Model

Module

Panel

Backlight Type

Using W/B table

All

All

All

Direct LED

O

*Connecting picture of the measuring instrument (On Automatic control)

Inside PATTERN is used when W/B is controlled. Connect to auto controller or push Adjustment R/C P-ONLY → Enter the mode of White-Balance, the pattern will come out.

Full White Pattern	CA-210

COLOR

ANALYZER

TYPE : CA-210

RS-232C Communication

*Auto-control interface and directions

(1)Adjust in the place where the influx of light like floodlight around is blocked. (illumination is less than 10 lux).

(2)Adhere closely the Color analyzer(CA210) to the module less than 10 cm distance, keep it with the surface of the Module and Color analyzer's prove vertically.(80° ~ 100°).

(3)Aging time

-After aging start, keep the power on (no suspension of power supply) and heat-run over 5 minutes.

-Using 'no signal' or 'POWER ONLY' or the others, check the back light on.

▪ Auto adjustment Map(using RS-232C to USB cable)
RS-232C COMMAND
[CMD		ID	DATA]
Wb		00	00	White Balance Start
Wb		00	ff	White Balance End
	RS-232C COMMAND						CENTER
		[CMD ID DATA]			MIN	(DEFAULT)				MAX
		Cool	Mid	Warm		Cool		Mid	Warm
R Gain		jg	Ja	jd	00	172		192	192	254
G Gain		jh	Jb	je	00	172		192	192	192
B Gain		ji	Jc	jf	00	192		192	172	254
R Cut						64		64	64	128
G Cut						64		64	64	128
B Cut						64		64	64	128

<Caution>

Color Temperature : COOL, Medium, Warm.

One of R Gain/G Gain/ B Gain should be kept on 0xC0, and adjust other two lower than C0.(When R/G/B Gain are all C0, it is the FULL Dynamic Range of Module)

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

*Manual W/B process using adjust Remote control.

▪After enter Service Mode by pushing "ADJ" key,

▪Enter White Balance by pushing "►" key at "9. White Balance".

EZ ADJUST

0. Tool Option1	Whit Balance
1. Tool Option2	Color Temp.	◄			►
2. Tool Option3				Cool
3. Tool Option4	R-Gain			172
4. Tool Option5	G-Gain			172
5. Tool Option6	B-Gain			192
6. Country Group	R-Cut			64
7. Area Option	G-Cut			64
8. ADC Calibration	B-Cut			64
9. White Balance	Test-Pattern			ON
10. 10 Point WB	Backlight			100
11. Test Pattern	Reset			To Set

12 EDID D/L

13.Sub B/C

14.Ext. Input Adjust

*CASE Cool Mode

First adjust the coordinate far away from the target value(x, y).B.

1)x, y > target

2)x, y < target

3)x >target, y < target

4)x < target, y > target

-Every 4 case have to fit y value by adjusting B Gain and then fit x value by adjusting R-Gain.

-In this case, increasing/decreasing of B Gain and R Gain can be adjusted.

How to adjust

1)In case G gain more than 172

Adjust R Gain and B Gain less than 192

2)If the G gain value be adjusted down to 172 One of the R/B Gain is 254

3)If G Gain is 172 , More than one of R/B Gain is to be between 192~254

*CASE Medium / Warm

First adjust the coordinate far away from the target value(x, y).

1)x, y > target

i)Decrease the R, G.

2)x, y < target

i)First decrease the B gain,

ii)Decrease the one of the others.

3)x > target, y < target

i)First decrease B, so make y a little more than the target.

ii)Adjust x value by decreasing the R

4)x < target, y > target

i)First decrease B, so make x a little more than the target.

ii)Adjust x value by decreasing the G

*After you finished all adjustments, Press "In-start" key and compare Tool option and Area option value with its BOM, if it is correctly same then unplug the AC cable. If it is not same, then correct it same with BOM and unplug AC cable. For correct it to the model's module from factory Jig model.

*Push the "IN STOP" key after completing the function inspection. And Mechanical Power Switch must be set “ON”.

4.2. 3D function test

(Pattern Generator MSHG-600, MSPG-6100[Support HDMI1.4])

* HDMI mode NO. 872 , pattern No.83

(1)Please input 3D test pattern like below.

(2)When 3D OSD appear automatically , then select OK key.

(3)Don't wear a 3D Glasses, Check the picture like below.

4.3.IR emitter inspection

(1)Start 3D pattern inspection.

(2)If IR emitter signal is correctly received to IR receiver, the lamp of IR tester turns on.

4.4. Outgoing condition Configuration

■ When pressing IN-STOP key by SVC remocon, Red LED are blinked alternatively. And then automatically turn off. (Must not AC power OFF during blinking)

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

5. HI-POT Test

5.1. HI-POT auto-check preparation

- Check the POWER cable and SIGNAL cable insertion condition

5.2.HI-POT auto-check

(1)Pallet moves in the station. (POWER CORD / AV CORD is tightly inserted)

(2)Connect the AV JACK Tester.

(3)Controller (GWS103-4) on.

(4)HI-POT test (Auto)

-If Test is failed, Buzzer operates.

-If Test is passed, GOOD Lamp on and move to next process automatically.

5.3.Checkpoint

(1)Test voltage

-Touchable Metal : 3 KV / min at 100 mA

-SIGNAL : 3KV / min at 100 mA

(2)TEST time: 1 second. (case : mass production )

(3)TEST POINT

-Touchable Metal => LIVE & NEUTRAL : Touchable Metal.

-SIGNAL => LIVE & NEUTRAL : SIGNAL.

6.Model name & Serial number D/L

▪Press "Power on" key of service remote control.

(Baud rate : 115200 bps)

▪Connect RS232 Signal Cable to USB Jack.

▪Write Serial number

▪Must check the serial number at the Diagnostics of SET UP menu.

(Refer to below).

6.1. Signal Table

CMD LENGTH ADH ADL DATA_1 . . . Data_n CS DELAY

CMD : A0h

LENGTH : 85~94h (1~16 bytes)

ADH : EEPROM Sub Address high (00~1F)

ADL : EEPROM Sub Address low (00~FF) Data : Write data

CS : CMD + LENGTH + ADH + ADL + Data_1 +...+ Data_n Delay : 20ms

6.2. Command Set

Adjust mode	CMD(hex)	LENGTH(hex)	Description
EEPROM WRITE	A0h	84h+n	n-bytes Write (n = 1~16)

*Description

FOS Default write : <7mode data> write

Vtotal, V_Frequency, Sync_Polarity, Htotal, Hstart, Vstart, 0,

Phase

Data write : Model Name and Serial Number write in EEPROM,.

6.3.Method & notice

(1)Serial number D/L is using of scan equipment.

(2)Setting of scan equipment operated by Manufacturing Technology Group.

(3)Serial number D/L must be conformed when it is produced in production line, because serial number D/L is mandatory by

D-book 4.0.

*Manual Download(Model Name and Serial Number)

If the TV set is downloaded by OTA or Service man, sometimes model name or serial number is initialized.(Not always)

There is impossible to download by bar code scan, so It need Manual download.

1)Press the "Instart" key of Adjustment remote control.

2)Go to the menu "6.Model Number D/L" like below photo.

3)Input the Factory model name or Serial number like photo.

4)Check the model name Instart menu. → Factory name displayed. ex 47LF560V-ZA)

5)Check the Diagnostics.(DTV country only) → Buyer model displayed.(ex 47LF560V-ZA)

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

7. MAC Address & CI+ key download

7.1. MAC Address

7.1.1. Equipment & Condition

▪Play file : Serial.exe

▪MAC Address edit

▪Input Start / End MAC address

7.1.2. Download method

(1) Communication Prot connection

Connection: PCBA(USB Port) → USB to Serial Adapter(UC232A) → RS-232C cable → PC(RS-232C port)

* Caution: LJ21* chassis support only UC-232A driver. (only use this one.)

(2)MAC Address & CI+ Key Download

▪Set CI+ Key path Directory at Start Mac & CI+ Download

Programme

▪Com 1,2,3,4 and 115200(Baudrate)

7.2. LAN Inspection

7.2.1. Equipment & Condition

▪ Each other connection to LAN Port of IP Hub and Jig

7.2.2. LAN inspection solution

▪LAN Port connection with PCB

▪Network setting at MENU Mode of TV

▪Setting automatic IP

▪Setting state confirmation

-> If automatic setting is finished, you confirm IP and MAC Address.

GP4_LOW

▪Port connection button click(1)

▪Push the (2) MAC Address write.

▪At success Download, check the OK (3)

▪Start CI+ Key Download, Push the (4)

▪Check the OK or NG

7.3. LAN PORT INSPECTION(PING TEST)

Connect SET -> LAN port == PC -> LAN Port

SET PC

7.3.1. Equipment setting

(1)Play the LAN Port Test PROGRAM.

(2)Input IP set up for an inspection to Test Program. *IP Number : 12.12.2.2

7.3.2. LAN PORT inspection (PING TEST)

(1)Play the LAN Port Test Program.

(2)Connect each other LAN Port Jack.

(3)Play Test (F9) button and confirm OK Message.

(4)Remove LAN cable.

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

- 17 - .reserved rights All .Inc .Electronics LG © Copyright

purposes service and training for Only

Only Use Internal LGE

USB (JK700)

HDMI2

(JK801)

Headphone (JK3000)

SIDE LF62/57/56

CI SLOT (P1900)

Tuner (TU3701) F/NIM

HDMI1 REAR (JK800)

SPDIF(Optic)

(JK1001) except LF54

COMPONENT (JK2802)

		DM/DP
	+5V_USB	OCP	USB1_OCP/CTL
		SN1406035RGER

CK+/-, D0+/-, D1+/-, D2+/-,_HDMI4

DDC_SCL/SDA_4, HDMI_CEC

HP_L/ROUT

NAND FLASH

IC102 (1Gbit)

H27U1G8F2CTR -BC

T4LCX244FT Buffer

PCM_A[8:14]

PCM_DATA[0:7]

TS_DATA[0:7]

LNB_OUT, DEMOD_RESET

LNB_TX

DEMOD_SCL/SDA

IF_N/P

TU_SCL / SDA

IF_AGC

CK+/-, D0+/-, D1+/-, D2+/-_HDMI2

DDC_SCL/SDA_2, HDMI_CEC

SPDIF_OUT

COMP2_Y+/Pb+/Pr+/L_R_IN or AV_CVBS_IN/L_R_IN

Main SOC

M1A-LGE2133

(IC101, DDR3 128MB)

	SPI_SCK/SDI/SDO/CS		Serial Flash
			(IC1300, 8Mbit)
	I2C_SCL/SDA		System EEPROM
			(IC104, 256Kbit)
			X-tal
			24MHZ
	B-MDQL[0 -7], B-MDQU[0 -7],…		DDR3 SDRAM
			(IC1201, 128MB)
	AUD_MASTER_CLK,			SPK_L
	AUD_LRCH,
	AUD_LRCK, AUD_SCK		TAS5733
	AMP_SCL/SDA
			(IC5600)
				SPK_R
	Jog KEY, LED_R, IR		Connector
			(P4600)
			(P1800)	(P1801)
	RXA0+/-~RXA4+/-, RXACK+/ -		VDSwafe	VDSwafe
	RXB0+/-~RXB4+/-, RXBCK+/ -
			FHDP51Lr	HDP Lr30

Model 3D T2/C/S2 CIS .1

DIAGRAM BLOCK

- 18 - .reserved rights All .Inc .Electronics LG © Copyright

purposes service and training for Only

Only Use Internal LGE

USB (JK700)

HDMI2

(JK801)

Headphone (JK3000)

SIDE LF62/57/56

CI SLOT (P1900)

Tuner (TU3701) F/NIM

HDMI1 REAR (JK800)

SPDIF(Optic)

(JK1001) except LF54

COMPONENT (JK2802)

		DM/DP
	+5V_USB	OCP	USB1_OCP/CTL
		SN1406035RGER

CK+/-, D0+/-, D1+/-, D2+/-,_HDMI4

DDC_SCL/SDA_4, HDMI_CEC

HP_L/ROUT

NAND FLASH

IC102 (1Gbit)

H27U1G8F2CTR -BC

T4LCX244FT Buffer

PCM_A[8:14]

PCM_DATA[0:7]

TS_DATA[0:7]

LNB_OUT, DEMOD_RESET

LNB_TX

DEMOD_SCL/SDA

IF_N/P

TU_SCL / SDA

IF_AGC

CK+/-, D0+/-, D1+/-, D2+/-_HDMI2

DDC_SCL/SDA_2, HDMI_CEC

SPDIF_OUT

COMP2_Y+/Pb+/Pr+/L_R_IN or AV_CVBS_IN/L_R_IN

Main SOC

M1A-LGE2134

(IC101, DDR3 256MB)

SPI_SCK/SDI/SDO/CS	Serial Flash
	(IC1300, 8Mbit)
I2C_SCL/SDA	System EEPROM
	(IC104, 256Kbit)
	X-tal
	24MHZ

	AUD_MASTER_CLK,		SPK_L
	AUD_LRCH,
	AUD_LRCK, AUD_SCK	TAS5733
	AMP_SCL/SDA
		(IC5600)
			SPK_R
	Jog KEY, LED_R, IR	Connector
		(P4600)
		(P1800)	(P1801)
	RXA0+/-~RXA4+/-, RXACK+/ -	LVDSFHDwafer	LVDSHDwafer
	RXB0+/-~RXB4+/-, RXBCK+/ -
		51P	30P

Model 2D T2/C/S2 CIS .2

- 19 - .reserved rights All .Inc .Electronics LG © Copyright

purposes service and training for Only

Only Use Internal LGE

USB

(JK700)

HDMI2

(JK801)

Headphone (JK3000)

SIDE LF62/57/56

CI SLOT (P1900)

Tuner (TU3701) F/NIM

HDMI1 REAR (JK800)

SPDIF(Optic)

(JK1001) except LF54

LAN (JK2100) Only UK

F-SCART (JK2801)

COMPONENT (JK2802)

		DM/DP
	+5V_USB	OCP	USB1_OCP/CTL
		SN1406035RGER

CK+/-, D0+/-, D1+/-, D2+/-,_HDMI4

DDC_SCL/SDA_4, HDMI_CEC

HP_L/ROUT

NAND FLASH

IC102 (1Gbit)

H27U1G8F2CTR -BC

T4LCX244FT Buffer

PCM_A[8:14]

PCM_DATA[0:7]

TS_DATA[0:7]

LNB_OUT, DEMOD_RESET

LNB_TX

DEMOD_SCL/SDA

IF_N/P

TU_SCL / SDA

IF_AGC

CK+/-, D0+/-, D1+/-, D2+/-_HDMI2

DDC_SCL/SDA_2, HDMI_CEC

SPDIF_OUT

EPHY_TP/TN/RP/RN

SC1/AV2_CVBS_IN, SC1_R+/G+/B+

DTV/MNT_OUT, DTV/MNT_L/R_OUT

COMP2_Y+/Pb+/Pr+/L_R_IN or AV_CVBS_IN/L_R_IN

Main SOC

M1A-LGE2134

(IC101, DDR3 256MB)

SPI_SCK/SDI/SDO/CS	Serial Flash
	(IC1300, 8Mbit)
I2C_SCL/SDA	System EEPROM
	(IC104, 256Kbit)
	X-tal
	24MHZ

	AUD_MASTER_CLK,		SPK_L
	AUD_LRCH,
	AUD_LRCK, AUD_SCK	TAS5733
	AMP_SCL/SDA
		(IC5600)
			SPK_R
	Jog KEY, LED_R, IR	Connector
		(P4600)
		(P1800)	(P1801)
	RXA0+/-~RXA4+/-, RXACK+/ -	VDSwafe	VDSwafe
	RXB0+/-~RXB4+/-, RXBCK+/ -
		FHDP51Lr	HDP Lr30

Model 2D T2/C/S2 EU .3

- 20 - .reserved rights All .Inc .Electronics LG © Copyright

purposes service and training for Only

Only Use Internal LGE

USB

(JK700)

Headphone (JK3000)

LF62/57/56

SIDE

CI SLOT (P1900)

Tuner (TU2600) H/NIM

HDMI1

(JK4200)

REAR

HDMI2

(JK4201)

SPDIF(Optic)

(JK1001) except LF54

F-SCART (JK2801)

COMPONENT (JK2802)

		DM/DP
	+5V_USB	OCP	USB1_OCP/CTL
		SN1406035RGER

HP_L/ROUT

NAND FLASH

IC102 (1Gbit)

H27U1G8F2CTR -BC

T4LCX244FT Buffer

PCM_A[8:14]

PCM_DATA[0:7]

TS_DATA[0:7]

IF_N/P

TU_SCL / SDA

IF_AGC

CK+/-, D0+/-, D1+/-, D2+/-_HDMI2

DDC_SCL/SDA_2, HDMI_CEC

CK+/-, D0+/-, D1+/-, D2+/-,_HDMI4

DDC_SCL/SDA_4, HDMI_CEC

SPDIF_OUT

SC1/AV2_CVBS_IN, SC1_R+/G+/B+

DTV/MNT_OUT, DTV/MNT_L/R_OUT

COMP2_Y+/Pb+/Pr+/L_R_IN or AV_CVBS_IN/L_R_IN

Main SOC

M1A-LGE2134

(IC101, DDR3 256MB)

SPI_SCK/SDI/SDO/CS	Serial Flash
	(IC1300, 8Mbit)
I2C_SCL/SDA	System EEPROM
	(IC104, 256Kbit)
	X-tal
	24MHZ

	AUD_MASTER_CLK,		SPK_L
	AUD_LRCH,
	AUD_LRCK, AUD_SCK	TAS5733
	AMP_SCL/SDA
		(IC5600)
			SPK_R
	Jog KEY, LED_R, IR	Connector
		(P4600)
		(P1800)	(P1801)
	RXA0+/-~RXA4+/-, RXACK+/ -	VDSwafe	VDSwafe
	RXB0+/-~RXB4+/-, RXBCK+/ -
		FHDP51Lr	HDP Lr30

Model 2D T/C EU .4

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 Schematic Diagram and 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	500	502
		501
	800	120	900
	521
LV1	540
	530	121
			AG1
	820		A10	Set + Stand
			A2
	200

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

Trouble shooting guide

Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes	LGE Internal Use Only

Contents of Standard Repair Process

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

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	Tuning fail, Picture broken/ Freezing	3, 4
4		Color error	5
5		Vertical/Horizontal bar, residual image, light spot,	6
		external device color error
6	B. Power error	No power	7
7		Off when on, off while viewing, power auto on/off	8
8	C. Audio error	No audio/Normal video	9
9		Wrecked audio/discontinuation/noise	10
10	D. Function error	Remote control & Local switch checking	11
11		External device recognition error	12
12	E. Noise	Circuit noise, mechanical noise	13
13	F. Exterior error	Exterior defect	14

Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes	LGE Internal Use Only

Standard Repair Process

A. Video error	Established
	date
Error symptom
No video / Normal audio	Revised date	1/14

First of all, Check whether all of cables between board is inserted properly or not.

(Main B/D ↔ Power B/D, LVDS Cable, Speaker Cable, IR B/D Cable…)

Y

A1

Y

A4

Y

No video

Check Back Light

Check Power

Normal

Replace T-con

Normal

On

Normal audio

Audio

On with naked eye

Board 13.2V etc.

Voltage

Board or module

N

A2

N

N

Move to

Check Power Board to LED Back light Voltage

Repair Power

No video/No audio

Board or parts

Precaution A6 & A3

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

Y

Normal Change module

Voltage

N	End

Repair Power

Board or parts

Replace Main Board		Re-enter White Balance value

Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes	LGE Internal Use Only

Standard Repair Process

	A. Video error	Established
		date
Error symptom
	No video / No audio	Revised date		2/14

		A4
		Check various		Y		Check and
No video /			Normal
		voltages of Power				replace
No audio			Voltage
		Board ( 13.2V)				MAIN B/D
			N				End
			Replace Power
			Board and repair
			parts

Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes	LGE Internal Use Only

Standard Repair Process

		A. Video error	Established
			date
	Error symptom
		Tuning fail, Picture broken/ Freezing	Revised date		3/14

A5

Check RF Signal level

. By using Digital signal level meter

. By using Diagnostics menu on OSD

( Menu → Customer Support(red button on remote control) → Signal Test )

-Signal strength (Normal : over 50%)

-Signal quality (Normal : over 50%)

Normal Y

Signal

N

Check RF Cable

Connection

1.Reconnection

2.Install Booster

Normal N

Picture

Y

End

Check whether other equipments have problem or not. (By connecting RF Cable at other equipment)

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

	A6
Normal Y	Check
Picture	S/W Version
N

Contact with signal distributor or broadcaster (Cable or Air)

SVC	N		Check		Normal	Y	End
Bulletin			Tuner soldering		Picture
Y					N
S/W Upgrade					Replace
					Main B/D

Normal N

Picture

Y

End

Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes	LGE Internal Use Only

Standard Repair Process

		A. Video error	Established
			date
	Error symptom
		Tuning fail, Picture broken/ Freezing	Revised date		4/14

A5

Check RF Signal level

Check RF signal cable (DVB satellite signal or not) Check whether other equipments have problem or not. (By connecting RF Cable at other equipment)

→ Set-Top-Box, Different maker TV etc

			Check satellite setting.
	Normal	Y	- Check LNB frequency.
			- Check satellite
	Signal
			- Check Satellite connection
	N		(DiSEqC, motor, etc…)

	A6
Normal Y	Check	SVC	N	Check		Replace
Setting	S/W Version	Bulletin		Tuner soldering		Main B/D

N Y

Contact with signal	Change satellite setting	S/W Upgrade
distributor	(match with installed ANT)
or broadcaster
(Cable or Air)
	Normal N	Normal N
	Picture	Picture
End	Y	Y
	End	End

Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes	LGE Internal Use Only

Standard Repair Process

	A. Video error	Established
		date
Error symptom
	Color error	Revised date		5/14

								A8 / A9
A7
								Check and
Check color by input					Y			replace Link
- External Input			Color					Cable
- COMPONENT			error					(LVDS) and
- HDMI/DVI				N				contact
								condition
			Check error
			color input
			mode
A10								External
Check Test pattern						Input/Component
								error

HDMI error

	Color	Y						Color	Y
				Replace Main B/D							Replace module
	error							error
	N							N
								End
	Check				External		Y
	external
					device/Cable					Replace Main B/D
	device and
					Normal
	cable
					N
					Request repair
					for external
					device/cable
					N
	Check external				External		Y
	device and				device/Cable					Replace Main B/D
	cable				Normal

Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes	LGE Internal Use Only

Standard Repair Process

A. Video error

Established

Error symptom

date

Vertical / Horizontal bar, residual image,

Revised date

6/14

light spot, external device color error

Vertical/Horizontal bar, residual image, light spot

Replace

Module

A7

A8/ A9

N

Check color condition by input

Check external

Screen Y

Screen Y

Check and

Screen N

- External Input

device

Screen

Replace Main B/D

- Component/AV

normal

connection

normal

replace Link

normal

normal

Cable

- HDMI

N

condition

N

Y

Y

A10

Replace

Request repair

End

End

Check Test pattern

module

for external

device

External device screen error-Color error

Check screen

Check Y condition by input Check S/W Version Version -External Input

-Component

HDMI/DVI

N

S/W Upgrade

Normal N

Screen

Y

End

External

Input

error

Compo nent error

Connect other external
device and cable
(Check normal operation of			Screen N
External Input, Component
			normal
and HDMI by connecting
Jig, pattern Generator,
Set-top Box etc.			Y
		Request repair for
		external device

	Connect other external
	device and cable
	(Check normal operation
HDMI	of External Input,
error	Component, HDMI by
	connecting Jig, pattern
	Generator ,Set-top Box
	etc.

Y

Screen N

normal

Replace

Main B/D

Replace

Main B/D

Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes	LGE Internal Use Only

Standard Repair Process

B. Power error

Established

date

Error symptom

No power

Revised date

7/14

A11

Normal

A13

DC Power on

N

Y

Check

Power

Y

Check Power

Replace

by pressing Power Key

Operati

OK

Power LED

LED On

On Remote control

on

On ‘”High”

Power B/D

Stand-By : Red

N

Y

Replace Main B/D

Check Power cord

was inserted properly

A4

Measure voltage of each output of Power B/D

N

Normal

Y

A12

Normal

Normal

Y

Y

Check ST-BY 3.5V

Replace Main B/D

Voltage

Voltage

End

N

N

Replace Power B/D

Replace Power B/D

Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes	LGE Internal Use Only