LG 49LF620V-ZB Schematic

Internal Use Only

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LED TV

SERVICE MANUAL

CHASSIS : LD55T

MODEL : 49LF620V 49LF620V-ZB

CAUTION

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

Printed in KoreaP/NO : MFL68646113 (1503-REV00)

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

Only for training and service purposes

- 2 -

SAFETY PRECAUTIONS

IMPORTANT SAFETY NOTICE

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

Only for training and service purposes

- 3 -

SERVICING PRECAUTIONS

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

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

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

General Servicing Precautions

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

a. Removing or reinstalling any component, circuit board

module or any other receiver assembly.

b. Disconnecting or reconnecting any receiver electrical plug

or other electrical connection.

c. Connecting a test substitute in parallel with an electrolytic

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

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

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

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

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

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

of contacts in not required.

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

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

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

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

service manual.

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

heat sink in this receiver.

Electrostatically Sensitive (ES) Devices

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

devices are integrated circuits and some eld-effect transistors

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

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

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

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

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

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

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

electrical charges sufcient to damage ES devices.

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

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

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

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

General Soldering Guidelines

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

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

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

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

5. Use the following unsoldering technique

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

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

type solder removal device or with solder braid.

CAUTION: Work quickly to avoid overheating the circuit

board printed foil.

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

(500 °F to 600 °F)

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

against the component lead until the solder melts.

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

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

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

splashed solder with a small wire-bristle brush.

Only for training and service purposes

- 4 -

IC Remove/Replacement

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

Removal

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

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

Replacement

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

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

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

"Small-Signal" Discrete Transistor Removal/Replacement

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

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

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

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

Power Output, Transistor Device Removal/Replacement

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

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

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

4. Insert new transistor in the circuit board.

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

6. Replace heat sink.

Diode Removal/Replacement

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

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

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

4. Securely crimp each connection and solder it.

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

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

Circuit Board Foil Repair

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

At IC Connections

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

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

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

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

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

At Other Connections

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

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

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

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

Fuse and Conventional Resistor Removal/Replacement

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

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

Only for training and service purposes

- 5 -

SPECIFICATION

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

1. Application range

This specification is applied to the LED TV used LD55T chassis.

2. Requirement for Test

Each part is tested as below without special appointment.

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

2) Relative Humidity: 65 % ± 10 %

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

4) Specification and performance of each parts are followed

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

5) The receiver must be operated for about 5 minutes prior to

the adjustment.

3. Test method

1) Performance: LGE TV test method followed

2) Demanded other specification

- Safety : CE, IEC specification

- EMC : CE, IEC specification

4. Model General Specification

No. Item Specication 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/Netherlands/ 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/Netherlands/ 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-S): 29 countries

Italy/Germany/France/Spain/Netherlands/ Belgium/Luxemburg/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, TURKSAT 2A/3A, INTERSAT10

Only for training and service purposes

- 6 -

No. Item Specication Remarks

Analogue TV

1) PAL-B/G/D/K/I

2) SECAM-B/G/D/K/I, SECAM L/L’

Analogue TV : (RF) VHF: E2 to E12, UHF : E21 to E69 (CATV) S1 to S20, HYPER: S21 to S47

Digital TV

2 Broadcasting system

3 Receiving system

4 Scart Jack (1EA) PAL, SECAM

Component & AV

Common port (1EA)

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)

10 USB (1EA) EMF, DivX HD, For SVC (download) JPEG, MP3, DivX HD

11 DVB

12 Ethernet (1EA) DLNA(Wired, DMP only) Only UK T2 Model (LF57/LF56/LF55/LF54) : for MHEG

1) DVB-T

2) DVB-C

Satellite Digital TV

1) DVB-T/T2

2) DVB-C

3) DVB-S/S2

Analog : Upper Heterodyne Digital : COFDM, QAM

Video Input RCA (PAL, SECAM, NTSC)

Component Input (Y/Cb/Cr, Y/Pb/Pr)

Antenna, AV1, AV2, Component, HDMI1, HDMI2, USB

DVB-T

DVB-C

DVB-S CI + : Germany(Astra HD+ )

Digital TV : VHF, UHF

Satellite TV : VHF, UHF, C-Band, Ku-Band

► DVB-T

- Guard Interval(Bitrate_Mbit/s) : 1/4, 1/8, 1/16, 1/32

- Modulation : Code Rate QPSK : 1/2, 2/3, 3/4, 5/6, 7/8 16-QAM : 1/2, 2/3, 3/4, 5/6, 7/8 64-QAM : 1/2, 2/3, 3/4, 5/6, 7/8

► DVB-T2

- Guard Interval(Bitrate_Mbit/s) : 1/4, 1/8, 1/16, 1/32, 1/128, 19/128, 19/256,

- Modulation : Code Rate QPSK : 1/2, 2/5, 2/3, 3/4, 5/6 16-QAM : 1/2, 2/5, 2/3, 3/4, 5/6 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

Scart 1 Jack is Full scart and support RF-OUT(analog). EU only

4 System : PAL, SECAM, NTSC, PAL60

LF62/LF57/LF56 Series

CI : UK, Finland, Denmark, Norway, Sweden, Russia, Spain,

Ireland, Luxemburg, Belgium, Netherland

CI+ : France(Canal+), Italy(DGTVi)

CI : Switzerland, Austria, Slovenia, Hungary, Bulgaria CI+ : Switzerland(UPC,Cablecom), Netherland(Ziggo),

Germany(KDG,CWB), Finland(labwise)

Only for training and service purposes

- 7 -

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

720*576 15.625 50.00 13.5 SDTV ,DVD 576I

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

Only for training and service purposes

- 8 -

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

Only for training and service purposes

- 9 -

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

11 1920*1080 67.50 60 148.5 HDTV 1080P

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

Side by Side(half), Top and bottom, Single frame sequential

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

Only for training and service purposes

- 10 -

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

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 rst.

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.

which

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.

Only for training and service purposes

- 11 -

* 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.

Tool

MODEL

42LF620V-ZB 107 2503 6850 50528 1538 2320

Option1

Option2

Option3

Tool

Option4

Tool

Option5

Tool

Option6

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 12 EDID D/L

13. Sub B/C

14. Ext. Input Adjust

ADC Calibration

ADC Comp 480i ADC Comp 1080p

ADC Type ◄ ►

Start Reset

OTP

OK OK

<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 MODE

ADC adjust

Adjust ‘Mode In’

ADC Adjust

A A 0 0

A D 1 0

When transfer the ‘Mode In’, Carry the command.

Automatically 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 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

0. Tool Option1

1. Tool Option2

2. Tool Option3

3. Tool Option4

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.

EDID D/L

HDMI1 NG HDMI2 NG

Start Reset

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

Check sum

(Hex)

Block 0 40

Block 1

FHD

HDMI

23 (HDMI1) 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.

Only for training and service purposes

- 12 -

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

Medium 9,300 K

Warm 6,500 K

X=0.271 (± 0.002) Y=0.270 (± 0.002)

X=0.286 (± 0.002) Y=0.289 (± 0.002)

X=0.313 (± 0.002) Y=0.329 (± 0.002)

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

NetCase5

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

Aging time

(Min)

Cool Medium Warm

x y x y x y

271 270 286 289 313 329

▪ Normal line(LGD/CMI, January ~ February for Gumi, Apply

not Cinema Screen)

NetCase5

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 time

(Min)

Cool Medium Warm

x y x y x y

271 270 286 289 313 329

▪ Aging chamber(LGD/CMI)

NetCase4

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

Aging time

(Min)

Cool Medium Warm

x y x y x y

271 270 285 293 313 329

X=0.278 Y=0.280

X=0.293 Y=0.299

X=0.320 Y=0.339

▪ 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

RS-232C Communication

CA-210

COLOR ANALYZER TYPE : CA-210

* 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

[CMD ID DATA]

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

MIN

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)

CENTER

(DEFAULT)

MAX

Only for training and service purposes

- 13 -

* 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

1. Tool Option2

2. Tool Option3

3. Tool Option4

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

* 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.

Whit Balance

Color Temp. ◄ ► R-Gain G-Gain B-Gain R-Cut G-Cut B-Cut Test-Pattern Backlight Reset To Set

Cool

172 172 192

64 64

64 ON 100

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.

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”.

4.3. 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)

Only for training and service purposes

- 14 -

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).

6.2. 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.

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

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

)

Only for training and service purposes

- 15 -

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(UC-

232A) → 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.

Only for training and service purposes

- 16 -

1. CIS T2/C/S2 3D Model

BLOCK DIAGRAM

Serial Flash

(IC1300, 8Mbit)

SPI_SCK/SDI/SDO/CS

(IC104, 256Kbit)

System EEPROM

I2C_SCL/SDA

SPK_L

SPK_R

30P HD LVDS wafer

(P1801)

X-tal

24MHZ

DDR3 SDRAM

(IC1201, 128MB)

B-MDQL[0 -7], B-MDQU[0 -7],…

(IC5600)

TAS5733

AUD_LRCH,

AMP_SCL/SDA

AUD_MASTER_CLK,

AUD_LRCK, AUD_SCK

(P4600)

Connector

Jog KEY, LED_R, IR

(P1800)

RXB0+/-~RXB4+/-, RXBCK+/ -

RXA0+/-~RXA4+/-, RXACK+/ -

51P FHD LVDS wafer

Main SOC

M1A-LGE2133

(IC101, DDR3 128MB)

USB1_OCP/CTL

OCP

DM/DP

SN1406035RGER

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

+5V_USB

USB

(JK700)

HDMI2

Only for training and service purposes

PCM_A[0:7]

HP_L/ROUT

IC102 (1Gbit)

NAND FLASH

DDC_SCL/SDA_4, HDMI_CEC

(JK801)

(JK3000)

Headphone

Only LF62/57/56

T4LCX244FT Buffer

H27U1G8F2CTR -BC

SIDE

PCM_DATA[0:7]

PCM_A[8:14]

(P1900)

CI SLOT

IF_N/P

LNB_TX

TS_DATA[0:7]

LNB_OUT, DEMOD_RESET

FE_TS_DATA[0:7]

Tuner

IF_AGC

TU_SCL / SDA

DEMOD_SCL/SDA

F/NIM

(TU3701)

SPDIF_OUT

DDC_SCL/SDA_2, HDMI_CEC

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

HDMI1

(JK800)

(JK1001)

except LF54

SPDIF(Optic)

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

(JK2802)

COMPONENT

REAR

- 17 -

2. CIS T2/C/S2 2D Model

Serial Flash

(IC1300, 8Mbit)

SPI_SCK/SDI/SDO/CS

(IC104, 256Kbit)

System EEPROM

I2C_SCL/SDA

X-tal

24MHZ

SPK_L

(IC5600)

TAS5733

AUD_LRCH,

AMP_SCL/SDA

AUD_MASTER_CLK,

AUD_LRCK, AUD_SCK

Main SOC

M1A-LGE2134

(IC101, DDR3 256MB)

SPK_R

(P1801)

(P4600)

Connector

(P1800)

Jog KEY, LED_R, IR

30P HD LVDS wafer

51P FHD LVDS wafer

RXB0+/-~RXB4+/ -, RXBCK+/ -

RXA0+/-~RXA4+/ -, RXACK+/ -

USB1_OCP/CTL

OCP

DM/DP

SN1406035RGER

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

+5V_USB

USB

(JK700)

HDMI2

Only for training and service purposes

PCM_A[0:7]

HP_L/ROUT

IC102 (1Gbit)

NAND FLASH

DDC_SCL/SDA_4, HDMI_CEC

(JK801)

(JK3000)

Headphone

Only LF62/57/56

T4LCX244FT Buffer

H27U1G8F2CTR -BC

SIDE

PCM_DATA[0:7]

PCM_A[8:14]

(P1900)

CI SLOT

TS_DATA[0:7]

FE_TS_DATA[0:7]

- 18 -

IF_N/P

LNB_TX

LNB_OUT, DEMOD_RESET

Tuner

IF_AGC

TU_SCL / SDA

DEMOD_SCL/SDA

F/NIM

(TU3701)

SPDIF_OUT

DDC_SCL/SDA_2, HDMI_CEC

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

HDMI1

(JK800)

(JK1001)

except LF54

SPDIF(Optic)

REAR

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

(JK2802)

COMPONENT

3. EU T2/C/S2 2D Model

Serial Flash

(IC1300, 8Mbit)

SPI_SCK/SDI/SDO/CS

(IC104, 256Kbit)

System EEPROM

I2C_SCL/SDA

SPK_L

SPK_R

30P HD LVDS wafer

(P1801)

X-tal

24MHZ

(IC5600)

TAS5733

AUD_LRCH,

AMP_SCL/SDA

AUD_MASTER_CLK,

AUD_LRCK, AUD_SCK

(P4600)

Connector

Jog KEY, LED_R, IR

(P1800)

RXB0+/-~RXB4+/-, RXBCK+/ -

RXA0+/-~RXA4+/-, RXACK+/ -

51P FHD LVDS wafer

Main SOC

M1A-LGE2134

(IC101, DDR3 256MB)

USB1_OCP/CTL

OCP

DM/DP

SN1406035RGER

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

+5V_USB

USB

(JK700)

HDMI2

Only for training and service purposes

PCM_A[0:7]

HP_L/ROUT

IC102 (1Gbit)

NAND FLASH

DDC_SCL/SDA_4, HDMI_CEC

(JK801)

(JK3000)

Headphone

Only LF62/57/56

T4LCX244FT Buffer

H27U1G8F2CTR -BC

SIDE

PCM_DATA[0:7]

PCM_A[8:14]

(P1900)

CI SLOT

IF_N/P

LNB_TX

TS_DATA[0:7]

LNB_OUT, DEMOD_RESET

FE_TS_DATA[0:7]

Tuner

IF_AGC

TU_SCL / SDA

DEMOD_SCL/SDA

F/NIM

(TU3701)

SPDIF_OUT

EPHY_TP/TN/RP/RN

DDC_SCL/SDA_2, HDMI_CEC

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

HDMI1

(JK800)

LAN

(JK1001)

except LF54

SPDIF(Optic)

Only UK

(JK2100)

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

(JK2801)

(JK2802)

F-SCART

COMPONENT

REAR

- 19 -

4. EU T/C 2D Model

Serial Flash

(IC1300, 8Mbit)

SPI_SCK/SDI/SDO/CS

(IC104, 256Kbit)

System EEPROM

I2C_SCL/SDA

SPK_L

SPK_R

30P HD LVDS wafer

(P1801)

X-tal

24MHZ

(IC5600)

TAS5733

AUD_LRCH,

AMP_SCL/SDA

AUD_MASTER_CLK,

AUD_LRCK, AUD_SCK

(P4600)

Connector

Jog KEY, LED_R, IR

(P1800)

RXB0+/-~RXB4+/-, RXBCK+/ -

RXA0+/-~RXA4+/-, RXACK+/ -

51P FHD LVDS wafer

Main SOC

M1A-LGE2134

(IC101, DDR3 256MB)

USB1_OCP/CTL

OCP

DM/DP

USB

HP_L/ROUT

SN1406035RGER

+5V_USB

(JK700)

Headphone

Only for training and service purposes

IC102 (1Gbit)

NAND FLASH

H27U1G8F2CTR -BC

(JK3000)

Only LF62/57/56

SIDE

PCM_A[0:7]

PCM_A[8:14]

T4LCX244FT Buffer

(P1900)

CI SLOT

IF_N/P

IF_AGC

Tuner

(TU2600)

TU_SCL / SDA

H/NIM

DDC_SCL/SDA_2, HDMI_CEC

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

HDMI1

(JK4200)

PCM_DATA[0:7]

TS_DATA[0:7]

FE_TS_DATA[0:7]

SPDIF_OUT

DDC_SCL/SDA_4, HDMI_CEC

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

HDMI2

(JK4201)

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

(JK1001)

except LF54

SPDIF(Optic)

DTV/MNT_OUT, DTV/MNT_L/R_OUT

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

(JK2801)

(JK2802)

F-SCART

COMPONENT

REAR

- 20 -

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

120

800

900

521

LV1

540

530

121

200

Only for training and service purposes

- 21 -

820

AG1

A10

Set + Stand

Trouble shooting guide

LGE Internal Use Only

Contents of Standard Repair Process

LGE Internal Use Only

* 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

No video/Normal audio 1

2 No video/No audio 2

3 Tuning fail, Picture broken/ Freezing 3, 4

A. Video error

4 Color error 5

Vertical/Horizontal bar, residual image, light spot, external device color error

No power 7

B. Power error

7 Off when on, off while viewing, power auto on/off 8 8

No audio/Normal video 9

C. Audio error

9 Wrecked audio/discontinuation/noise 10

Remote control & Local switch checking 11

D. Function error

11 External device recognition error 12 12 E. Noise Circuit noise, mechanical noise 13 13 F. Exterior error Exterior defect 14

Standard Repair Process

LGE Internal Use Only

A. Video error

Error symptom

No video / Normal audio

Established date

Revised date

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

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

No video Normal audio

Normal

Audio

Move to No video/No audio

☞A1

Check Back Light On with naked eye

☞A2

Check Power Board to LED Back light Voltage

Normal

Voltage

Repair Power Board or parts

☞A4

Check Power Board 13.2V etc.

Change module

Normal

Voltage

Repair Power Board or parts

End

Replace T-con Board or module

1/14

※Precaution

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

☞A6 & A3

Replace Main Board Re-enter White Balance value

Standard Repair Process

LGE Internal Use Only

Error symptom

No video / No audio

☞A4

Check various voltages of Power Board ( 13.2V)

A. Video error

No video / No audio

Normal

Voltage

Replace Power Board and repair parts

Check and replace MAIN B/D

End

Established date

Revised date

2/14

Standard Repair Process

LGE Internal Use Only

Error symptom

☞ A5

Check RF Signal level

Normal

Signal

Check RF Cable Connection

1. Reconnection

2. Install Booster

A. Video error

Tuning fail, Picture broken/ Freezing

. 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%)

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

Picture

Check S/W Version

SVC

Bulletin

Established

date

Revised date

Check Tuner soldering

Normal

Picture

3/14

End

Normal

Picture

End

Contact with signal distributor or broadcaster (Cable or Air)

S/W Upgrade

Normal Picture

End

Replace Main B/D

Standard Repair Process

LGE Internal Use Only

Error symptom

☞ A5

Check RF Signal level

Normal

Signal

Contact with signal

distributor

or broadcaster (Cable or Air)

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.

- Check LNB frequency.

- Check satellite

- Check Satellite connection (DiSEqC, motor, etc…)

A. Video error

Tuning fail, Picture broken/ Freezing

Normal

Setting

Change satellite setting (match with installed ANT)

☞ A6

Check S/W Version

Established

date

Revised date

SVC

Bulletin

S/W Upgrade

Check Tuner soldering

4/14

Replace Main B/D

End

Normal Picture

End

Normal

Picture

End

Standard Repair Process

LGE Internal Use Only

Error symptom

☞A7

Check color by input

- External Input

- COMPONENT

- HDMI/DVI

☞A10

Check Test pattern

Color

error

Check error color input mode

A. Video error

☞ A8 / A9

※ Check and

replace Link

Cable (LVDS) and contact condition

External

Input/Component

error

Color error

Color

error

Check external device and cable

Replace Main B/D

Established

date

Revised date

External

device/Cable

Normal

Color

error

End

5/14

Replace module

Replace Main B/D

HDMI

error

Check external device and cable

Request repair

for external

device/cable

External

device/Cable

Normal

Replace Main B/D

Standard Repair Process

LGE Internal Use Only

A. Video error

Error symptom

Vertical / Horizontal bar, residual image,

light spot, external device color error

Vertical/Horizontal bar, residual image, light spot

☞A7

Check color condition by input

- External Input

- Component/AV

- HDMI

☞A10

Check Test pattern

Replace module

External device screen error-Color error

Check S/W Version

Check

Version

S/W Upgrade

Screen normal

Check external

device connection condition

Check screen condition by input

-External Input

-Component HDMI/DVI

Screen

normal

Request repair

for external

device

External

☞ A8/ A9

Check and replace Link Cable

Input error

Compo

nent

error

Established

date

Revised date

Screen normal

Replace Main B/D

End

Connect other external device and cable (Check normal operation of

External Input, Component

and HDMI by connecting Jig, pattern Generator, Set-top Box etc.

Screen

normal

Request repair for

external device

6/14

Replace Module

Screen normal

End

Replace Main B/D

Normal Screen

End

HDMI

error

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

Screen normal

Replace Main B/D

Standard Repair Process

LGE Internal Use Only

Error symptom

☞A11

Check Power LED

Stand-By : Red

Power

LED On

Check Power cord was inserted properly

Normal

※

B. Power error

☞A12

Check ST-BY 3.5V

No power

DC Power on by pressing Power Key

On Remote control

☞A4

Measure voltage of each output of Power B/D

Normal Voltage

Established

date

Revised date

Normal

Operati

Normal

Voltage

☞A13

Check Power On ‘”High”

Replace Main B/D

7/14

Replace Power B/D

End

Replace Power B/D

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