LG 32LH520U, 32LH51xx Schematic

Internal Use Only

LED TV

SERVICE MANUAL

CHASSIS : LD67B / LD67C

MODEL : 32LH51** 32LH520U

32LH51**-ZA/ZC/ZE/ZG 32LH520U-ZA

CAUTION

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

P/NO : MFL69494401 (1603-REV02)

CONTENTS

CONTENTS ..............................................................................................	2
SAFETY PRECAUTIONS .........................................................................	3
SERVICING PRECAUTIONS ...................................................................	4
SPECIFICATION .......................................................................................	6
ADJUSTMENT INSTRUCTION ..............................................................	10
BLOCK DIAGRAM .................................................................................	16
EXPLODED VIEW ..................................................................................	19
DISASSEMBLY........................................................................................	20
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 LD67B /	1)	Performance: LGE TV test method followed
LD67C 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 notice.

1)Temperature : 25±5°C (77±9°C), CST : 40±5°C

2)Relative Humidity : 65±10%

3)Power Voltage :

Standard input voltage (AC100~240V@ 50/60Hz) Standard Voltage of each product 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
				DTV & Analog (Total 40 countries)
				DTV (MPEG2/4, DVB-T) :39 countries
				Albania/Algeria/Austria/Belarus/Belgium/Bosnia/Bulgaria/Croatia/Czech/
				Denmark/Estonia/Finland/France/Germany/Greece/Hungary/Ireland/Italy/
				Kazakhstan/Latvia/Lithania/Luxemburg/Macedonia/Morocco/Netherlands/
				Norway/Poland/Portugal/ Rumania/ Russia/ Serbia/ Slovakia/ Slovenia/
				Spain/Sweden/ Switzerland/ Turkey/ UK/ Ukraine
				DTV (MPEG2/4, DVB-T2): 9 countries
				UK/Denmark/Sweden/Finland/Norway/Ireland/Ukraine/Kazakhstan/
				Mongolia
				DTV (MPEG2/4, DVB-C): 39 countries
				Albania/Algeria/Austria/Belarus/Belgium/Bosnia/Bulgaria/Croatia/Czech/
	1	Market	EU/CIS	Denmark/Estonia/Finland/France/Germany/Greece/Hungary/Ireland/Italy/
			(PAL Market-40 Countries)	Kazakhstan/Latvia/ Lithania/Luxemburg/Macedonia/Morocco/Netherlands/
				Norway/Poland/Portugal/ Rumania/ Russia/ Serbia/ Slovakia/ Slovenia/
				Spain/Sweden/ Switzerland/ Turkey/ UK/ Ukraine
				DTV (MPEG2/4,DVB-S): 29 countries
				Italy/Germany/France/Spain/Netherlands/Belgium/Luxemburg/Greece/
				Czech/ Austria /Hungary/Swiss/Croatia/Turkey/Slovenia/Poland/Portugal/
				Morocco/Latvia/Estonia/Lithuania/Rumania/Bulgaria/Russia/Slovakia/Bos-
				nia/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, EU-
				TELSAT-W2A, HOTBIRD 6/8/9, EUTELSAT-SESAT, ASTRA 1L/H/M/KR,
				ASTRA 3A/3B, BADR 4/6, ASTRA 2D, EUROBIRD 3, EUTELSAT-W7, HEL-
				LASSAT 2, EXPRESS AM1, TURKSAT 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
				46 ~ 862 Mhz
			(1) Analogue TV	(Maximum number of storable programmes : 2000)
			- Terrestrial/Cable	950 ~ 2150 Mhz
			1) PAL/SCEAM	(Maximum number of storable programmes : 6000)
			B/G, D/K, I
			SECAM L	VHF III: 174 ~ 230 Mhz
				UHF IV: 470 ~ 606 Mhz
		Broadcasting system	(2) Digital TV	UHF V: 606 ~ 862 Mhz
	2	(Programme	- Satellite DTV
		coverage,Band)	1) DVB-S/S2*	S Band II : 230 ~ 300 Mhz
				S Band III : 300 ~ 470 Mhz
			- Terrestrial	(Maximum number of storable programmes : 2000)
			1) DVB-T/T2*	46 ~ 862 Mhz
			- Cable	(Maximum number of storable programmes : 2000)
			1) DVB-C	* : only DVB-T2/C/S2 support models
				External antenna impedance : 75 Ω
				► 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		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 : 4.0 Msymbols/s to 7.2 Msymbols/s
				- Modulation : 16QAM, 64-QAM, 128-QAM and 256-QAM
				► DVB-S
				- symbol rate
				DVB-S2 (8PSK / QPSK) : 2 ~ 45 Msymbol/s
				DVB-S (QPSK) : 2 ~ 45 Msymbol/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
	5	Component & AV	Video Input RCA (PAL, SECAM, NTSC)	4 System : PAL, SECAM, NTSC, PAL60
		Common port (1EA)	Component Input (Y/Cb/Cr, Y/Pb/Pr)
	6	HDMI Input (2EA)	HDMI1/2-DTV	Support HDCP (LH51/LH52 Series : HDMI Input (1EA)
	7	Audio Input (1EA)	Component & AV	Component & AV’s audio input is used by common port
	8	USB (1EA)	EMF, Xvid 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)
	9	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+)
	10	Ethernet (1EA)	Wired, DMP only	Only UK T2 Model (LH54/LH51/LH52/LH53) : for MHEG

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.Video resolutions (2D)

(1)Component Video Input (Y, CB/PB, CR/PR)

No.			Specification
	Resolution	H-freq(kHz)	V-freq.(kHz)		Pixel clock	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	28.125	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	67.432	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

(2) HDMI Input (PC/DTV)

	No.	Resolution	H-freq(kHz)	V-freq.(kHz)	Pixel clock(MHz)	Proposed			Remarks
		PC (DVI)				DDC
	1	640*350	31.46	70.09	25.17	EGA		X
	2	720*400	31.46	70.08	28.32	DOS		O
	3	640*480	31.46	59.94	25.17	VESA(VGA)		O
	4	800*600	37.87	60.31	40.00	VESA(SVGA)		O
	5	1024*768	48.36	60.00	65.00	VESA(XGA)		O
	6	1152*864	54.34	60.05	80.00	VESA		O
	7	1360*768	47.71	60.01	85.50	VESA (WXGA)		O
	8	1280*1024	63.98	60.02	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	15.73	59.94	13.500	SDTV 480I			Don’t insert in manual
	4	720*480	15.75	60.00	13.514	SDTV 480I
									spec. out
	5	720*576	15.62	50.00	13.500	SDTV 576I(DVB)
	6	720*480	31.47	59.94	27.00	SDTV 480P
	7	720*480	31.50	60.00	27.027	SDTV 480P
	8	720*576	31.25	50.00	27.00	SDTV 576P(DVB)
	9	1280*720	37.50	50.00	74.25	HDTV 720P(DVB)
	10	1280*720	45.00	60.00	74.25	HDTV 720P
	11	1280*720	44.96	59.94	74.176	HDTV 720P
	12	1920*1080	28.12	50.00	74.25	HDTV 1080I(DVB)
	13	1920*1080	33.75	60.00	74.25	HDTV 1080I
	14	1920*1080	33.72	59.94	74.176	HDTV 1080I
	15	1920*1080	56.25	50.00	148.50	HDTV 1080P(DVB)
	16	1920*1080	67.50	60.00	148.50	HDTV 1080P
	17	1920*1080	67.43	59.94	148.35	HDTV 1080P
	18	1920*1080	27.00	24.00	74.25	HDTV 1080P
	19	1920*1080	26.97	23.97	74.175	HDTV 1080P
	20	1920*1080	33.75	30.00	74.25	HDTV 1080P
	21	1920*1080	33.71	29.97	74.175	HDTV 1080P

(3) DTV 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, Top & Bottom

2

1920*1080

28.125

50

74.25

HDTV 1080I

Side by Side, Top & Bottom

(4) 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)

Copyright ©	LG Electronics. Inc. All rights reserved.	- 9 -	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 LD67B / LD67C 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 : 220V, 60Hz

(6)Adjustment equipments : Color Analyzer (CA-210 or CA-110), DDC Adjustment Jig equipment, SVC 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

3.1.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”.

HKNGZZZ DKP

(4)Click “Connect” tab. If “Can’t ” is displayed, Check connection between computer, jig and set.

2NGCUG %JGEM VJG 5RGGF 6Q WUG URGGF DGVYGGP

HTQO -*\ VQ -*\

(5)Click “Auto” tab and set as below.

(6)Click “Run”.

(7)After downloading, check “OK” message.

HKNGZZZ DKP

ĔĔĔ 1-

* USB DOWNLOAD (*.epk file 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 “UPDATING”

(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 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.

* After downloading, have to adjust TOOL OPTION again.

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

(2)Select "Adjust Check" and Push “OK” button.

(3)Push in the number. (Each of models has their number)

(4)Completed selecting Tool option.

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3.2.ADC Process (Optional)

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

(1)Enter Service Mode by pushing “ADJ” key.

(2)Enter Internal ADC mode by pushing “►” key at “10. ADC

Calibration”

Caution: Using ‘P-ONLY’ button of the Adjustment R/C, power on TV.

ADC Calibration Protocol (RS232)

NO	Item	CMD	CMD	Data 0
		1	2
Enter	Adjust	A	A	0	0	When transfer
Adjust	‘Mode					the ‘Mode In’,
MODE	In’					Carry the command.
ADC	ADC	A	D	1	0	Automatically
adjust	Adjust					adjustment
						(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 R/C.

3.3.EDID Download

(1)After enter Service Mode by pushing “ADJ” key.

(2)Enter EDID D/L mode.

(3)Enter “START” by pushing “OK” key.

Caution : Never connect HDMI cable when EDID downloaded.

3.4.EDID data

(1)2D HD 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
10			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	01	01
30	01	01	01	01	01	01	66	21	50	B0	51	00	1B	30	40	70
40	36	00	40	84	63	00	00	1E	64	19	00	40	41	00	26	30
50	18	88	36	00	40	84	63	00	00	18	00	00	00	FD	00	3A
60	3E	1E	53	10	00	0A	20	20	20	20	20	20
70															01
80	02	03	22	F1	4E	10	1F	04	93	05	14	03	02	12	20	21
90	22	15	01	26	15	07	50	09	57	07
A0			01	1D	80	18	71	1C	16	20	58	2C	25	00	A0	5A
B0	00	00	00	9E	01	1D	00	72	51	D0	1E	20	6E	28	55	00
C0	20	C2	31	00	00	1E	8C	0A	D0	8A	20	E0	2D	10	10	3E
D0	96	00	A0	5A	00	00	00	18	02	3A	80	18	71	38	2D	40
E0	58	2C	45	00	A0	5A	00	00	00	1E	00	00	00	00	00	00
F0	00	00	00	00	00	00	00	00	00	00	00	00	00	00	00

(2) 2D 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
10			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
70															01
80	02	03	22	F1	4E	10	9F	04	13	05	14	03	02	12	20	21
90	22	15	01	26	15	07	50	09	57	07
A0			01	1D	80	18	71	1C	16	20	58	2C	25	00	20	C2
B0	31	00	00	9E	01	1D	00	72	51	D0	1E	20	6E	28	55	00
C0	20	C2	31	00	00	1E	02	3A	80	18	71	38	2D	40	58	2C
D0	45	00	A0	5A	00	00	00	1E	01	1D	00	BC	52	D0	1E	20
E0	B8	28	55	40	C4	8E	21	00	00	1E	00	00	00	00	00	00
F0	00	00	00	00	00	00	00	00	00	00	00	00	00	00	00

Detail EDID Options are belowProduct ID

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

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

Monthly : ‘01’ → ‘01’, Year : ‘2016’ → ‘1A’ fix

Model Name(Hex): Refer to the ASCII Code Table. Cf) TV set’s model name in EDID data is below.

	MODEL NAME	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)
* ASCII Code

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Checksum: Changeable by total EDID data.(2D)

EDID C/S data				HD	FHD
				HDMI	HDMI
check sum	Block 0			73	3F
(Hex)
	Block 1			5B (HDMI1)	25 (HDMI1)
				4B (HDMI2)	15 (HDMI2)
Vendor Specific
1) HD/FHD Model(2D)
INPUT				MODEL NAME(HEX)
HDMI1			67 03 0C 00 10 00 80 1E
HDMI2			67 03 0C 00 20 00 80 1E

3.5. Function Check

(1) Check display and sound

■Check Input and Signal items. (cf. work instructions)

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.

- Cool temp Spec is 13000K

cool

med

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

Chassis or

Module

Panel

Backlight

Using W/B table

Model

Type

LD67T/B/C

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.

4. Total Assembly line process

4.1. White Balance adjustment

■W/B Equipment condition

CA210 : LED CH 14, 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

	Color	Mode	Temp	Coordinate	Target	Chassis
	Temper-			spec		or Model
	ature
		Cool	13,000k	X=0.271	X=0.278	ALL
				(±0.002)	Y=0.280	Model
				Y=0.270		(LD67T/
				(±0.002)		LD67B/
						LD67C)
		Me-	9,300k	X=0.286	X=0.293
		dium		(±0.002)	Y=0.299
				Y=0.289
				(±0.002)
		Warm	6,500k	X=0.313	X=0.320
				(±0.002)	Y=0.339
				Y=0.329
				(±0.002)

4.1.1. Auto-control interface and directions

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

(2)Adhere closely the Color Analyzer ( CA210 ) to the module less than 10cm distance, keep it with the surface of the Module and Color Analyzer’s Prove vertically.(90° +/- 2.5°).

(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					CENTER		MAX
		COMMAND					(DEFAULT)
		[CMD ID DATA]				MIN
	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

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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)

4.1.2. Manual W/B process using adjusts Remote control.

-After enter Service Mode by pushing “ADJ” key,

-Enter White Balance by pushing “►” key at “11. White

Balance”.

4.1.2.1. 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) if 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

4.1.2.2. CASE Medium / Warm

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

(1) x, y >target

) Decrease the R, G.

(2) x, y< target

) First decrease the B gain,

) Decrease the one of the others.

(3) x >target , y< target

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

) Adjust x value by decreasing the R

(4) x < target , y >target

) First decrease B, so make x a little more than the target. ) Adjust x value by decreasing the G

After You finish all adjustments, Press “In-start” button 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.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.

4.3. Outgoing condition Configuration

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

5. GND and 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 : 3KV / min at 100mA

-SIGNAL : 3KV / min at 100mA

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

(3)TEST POINT

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

-SIGNAL => LIVE & NEUTRAL : SIGNAL.

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6.Model Name & Serial Number Download

6.1.Model name & Serial number

(1)Press “Power on” key of service remote control.(Baud rate : 115200 bps)

(2)Connect USB to RS232 Signal Cable to USB Jack.

(3)Write Serial number.

(4)Must check the serial number at the Diagnostics of SET UP menu. (Refer to below).

a.Press the ‘In start’ key of ADJ remote control.

b.Go to the menu ‘6.Model Number D/L’ like below photo.

c.Input the Factory model name(ex 32LV3400-ZG) or Serial number like photo.

d.Check the model name Instart menu → Factory name displayed (ex 49LH540V-ZA)

e.Check the Diagnostics (DTV country only) → Buyer model displayed (ex 49LH540V-ZA)

6.2. 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

6.3. Command Set

No.	Adjust mode	CMD(hex)	LENGTH(hex)	Description
1	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.

6.4.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.

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

7.1.2.1. Communication Prot connection

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

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

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7.1.2.2. MAC Address & CI+ Key Download

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

Programme

▪Com 1,2,3,4 and 115200 (Baudrate)

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)

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.

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.

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BLOCK DIAGRAM

1. EU : T2/C/S2 : Model LH51/LH52 : LD67B

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2. EU : T/C : Model LH51/LH52 : LD67B

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3. CIS : T2/C/S2 : Model LH51/LH52 : LD67C

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