LG 32LF510A-TA, 32LF513A-TA, 43LF510A-TA, 43LF513A-TA, 49LF510A-TA Service manual & schematics

Internal Use Only

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LED TV

SERVICE MANUAL

CHASSIS : LB56A

MODEL : 43/49LF513A 43/49LF513A-TA

CAUTION

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

Printed in KoreaP/NO : MFL68743606 (1507-REV00)

CONTENTS

CONTENTS .............................................................................................. 2

SAFETY PRECAUTIONS

SERVICING PRECAUTIONS

SPECIFICATION

....................................................................................... 6

ADJUSTMENT INSTRUCTION

DISASSEMBLY

BLOCK DIAGRAM

EXPLODED VIEW

...................................................................................... 13

.................................................................................. 14

.................................................................................. 15

........................................................................ 3

.................................................................... 4

................................................................ 9

SCHEMATIC CIRCUIT DIAGRAM

TROUBLE SHOOTING GUIDE

................................................ APPENDIX

........................................... 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 LB56A 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

4. Model General Specification

* HDMI 1.4 with Deep Color is only apply for FHD Model

No. Item Specication Remarks

1. Market NON EU

2. Broadcasting system

BAND PAL(BG,I,BB) NTSC(M) China(DK)

3. Channel Storage

4. Receiving system Upper Heterodyne

5. Video Input PAL, SECAM, NTSC 2EA

6. Component Input Y/Cb/Cr, Y/ Pb/Pr Rear (1EA), Except RGB PC Models

7. USB Input MP3, JPEG,Movie Side (1EA)

8. AV Audio Output RCA-RF/AV/HDMI Audio Output Rear (1EA)

9. D-SUB Service Only Rear (1EA)

10. HDMI Input HDMI-DTV, Only PCM MODE AV input 2EA

11. Audio Input AV&Component &PC 2EA

VHF/UHF 01-C69 2-78 C1-C69

Cable S1-S47 1-71 S1-S47

PAL/SECAM B/G/D/K, PAL I, NTSC-M PALB/B

Only for training and service purposes

- 6 -

5. Component Video Input(Y, PB, PR)

No Resolution H-freq. (kHz) V-freq. (Hz) Pixel clock (MHz) Proposed

1 720*480 15.73 59.94 13.500 SDTV, DVD 480I(525I)

2 720*480 15.75 60.00 13.514 SDTV, DVD 480I(525I)

3 720*576 15.625 50.00 13.500 SDTV, DVD 576I(625I) 50Hz

4 720*480 31.47 59.94 27.000 SDTV 480P

5 720*480 31.50 60.00 27.027 SDTV 480P

6 720*576 31.25 50.00 27.000 SDTV 576P 50Hz

7 1280*720 44.96 59.94 74.176 HDTV 720P

8 1280*720 45.00 60.00 74.250 HDTV 720P

9 1280*720 37.50 50.00 74.25 HDTV 720P 50Hz

10 1920*1080 28.125 50.00 74.250 HDTV 1080I 50Hz,

11 1920*1080 33.72 59.94 74.176 HDTV 1080I

12 1920*1080 33.75 60.00 74.25 HDTV 1080I

13 1920*1080 56.25 50 148.5 HDTV 1080P

14 1920*1080 67.432 59.94 148.350 HDTV 1080P

15 1920*1080 67.5 60.00 148.5 HDTV 1080P

6. HDMI input

(PC-Spec. out but it can be shown the picture at only HDMI/DVI IN 1 via DVI to HDMI Cable)

No Resolution H-freq. (kHz) V-freq. (Hz) Pixel clock (MHz) Proposed

1 640×480 31.469 59.94 25.17 VESA(VGA)

2 800×600 37.879 60.317 40.00 VESA(SVGA)

3 1024×768 48.363 60.004 65.00 VESA(XGA)

4 1280×768 47.776 59.87 79.5 VESA(WXGA)

5 1360×768 47.72 59.799 84.62 VESA(WXGA)

6 1366×768 47.7 60.00 84.62 WXGA

7 1280×1024 63.595 60.00 108.875 SXGA

8 1920×1080 66.647 59.988 138.625 WUXGA

Only for training and service purposes

- 7 -

7. HDMI input (DTV)

No. Resolution H-freq. (kHz) V-freq. (Hz) Pixel clock(MHz) Proposed Remarks

1 720*480 15.73 59.94 13.500 SDTV, DVD 480I(525I)

Spec. out but display.2 720*480 15.75 60.00 13.514 SDTV, DVD 480I(525I)

3 720*576 15.625 50.00 13.500 SDTV, DVD 576I(625I) 50Hz

4 720*480 31.469 59.94 27 SDTV 480P

5 720*480 31.5 60.00 27.027 SDTV 480P

6 720*576 31.25 50.00 27 SDTV 576P

7 1280*720 44.96 59.94 74.176 HDTV 720P

8 1280*720 45 60.00 74.25 HDTV 720P

9 1280*720 37.5 50.00 74.25 HDTV 720P

10 1920*1080 28.125 50.00 74.25 HDTV 1080I

11 1920*1080 33.72 59.94 74.176 HDTV 1080I

12 1920*1080 33.75 60.00 74.25 HDTV 1080I

13 1920*1080 56.25 50.00 148.5 HDTV 1080P

14 1920*1080 67.43 59.94 148.350 HDTV 1080P

15 1920*1080 67.5 60.00 148.5 HDTV 1080P

16 1920*1080 27 24.00 74.25 HDTV 1080P

17 1920*1080 33.75 30.00 74.25 HDTV 1080P

18 1920*1080 26.97 23.97 74.25 HDTV 1080P

19 1920*1080 33.716 29.976 74.25 HDTV 1080P

Only for training and service purposes

- 8 -

ADJUSTMENT INSTRUCTION

1. Application Range

This specification sheet is applied to all of the LED TV with LB56A chassis.

2. Designation

(1) Because this is not a hot chassis, it is not necessary to

use an isolation transformer. However, the use of isolation

transformer will help protect test instrument. (2) Adjustment must be done in the correct order. (3) The adjustment must be performed in the circumstance of

25 °C ± 5 °C of temperature and 65 % ± 10 % of relative

humidity if there is no specific designation. (4) The input voltage of the receiver must keep 100-220 V,

50/60Hz. (5)

The receiver must be operated for over 5 minutes prior to

the adjustment when module is in the circumstance of

above 15 °C.

In case of keeping module is in the circumstance of 0 °C, it should be placed in the circumstance of above 15 °C for 2 hours. In case of keeping module is in the circumstance of below

-20 °C, it should be placed in the circumstance of above 15 °C for 3 hours.

* Caution

When a still image is displayed for 20 minutes or longer (especially where W/B scale is strong. Digital pattern 13ch and/or Cross hatch pattern 09ch), there can some afterimage in the black level area.

3. ADC Calibration

- An ADC calibration is automatically adjusted from DFT-Jig

- If it needs to adjust manually, refer to appendix.

* ADC Calibration Protocol (RS232)

NO Item CMD 1 CMD 2 Data 0

Enter Adjust MODE

ADC adjust

Adjust Sequence

▪aa 00 00 [Enter Adjust Mode] ▪xb 00 40 [Component1 Input (480i)] ▪ad 00 10 [Adjust 480i Comp1] ▪aa 00 90 End Adjust mode

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)

4. EDID Download

4.1. Overview

- It is a VESA regulation. A PC or a MNT will display an optimal resolution through information sharing without any necessity of user input. It is a realization of “Plug and Play”.

4.2. Equipment

- Since EDID data is embedded, EDID download JIG, HDMI cable are not need.

4.3. Download method

- The EDID data is automatically saved.

EZ ADJUST

0. Tool Option1

1. Tool Option2

2. Area Option

3. ADC Calibration

9. W/V ADJUST

5. EDID D/L(AC3) ►

■ 8bit FHD large inch

** HDMI 1 : 256Bytes

0 1 2 3 4 5 6 7 8 9 A B C D E F

0 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01 10 01 19 01 03 80 A0 5A 78 0A D9 B0 A3 57 49 9C 25 20 11 49 4B 21 08 00 01 01 45 40 61 40 01 01 81 80 30 01 01 D1 C0 01 01 02 3A 80 18 71 38 2D 40 58 2C 40 45 00 08 44 21 00 00 1E 1B 21 50 A0 51 00 1E 30 50 48 88 35 00 BC 88 21 00 00 1C 00 00 00 FC 00 4C 60 47 20 54 56 0A 20 20 20 20 20 20 20 00 00 00 FD 70 00 3A 3F 1C 44 0F 00 0A 20 20 20 20 20 20 01 80 02 03 28 F1 4F 90 07 01 16 02 03 11 12 13 04 14 90 05 20 22 1F 26 11 07 50 09 7F 07 83 01 00 00 68 A0 03 0C 00 10 00 80 1E 00 01 1D 00 80 51 D0 1C 20 B0 40 80 35 00 BC 88 21 00 00 1E 8C 0A D0 8A 20 E0

C0 2D 10 10 3E 96 00 13 8E 21 00 00 18 8C 0A A0 14 D0 51 F0 16 00 26 7C 43 00 C4 8E 21 00 00 98 01 1D

E0 80 18 71 1C 16 20 58 2C 25 00 C4 8E 21 00 00 9E F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

ⓐ Checksum: Changeable b y total EDID data.

EDID C/S data

check sum (Hex)

Block 0 BF

Block 1

EDID D/L

HDMI1 NG

HDMI2 NG

HDMI1 OK

HDMI2 OK

Start

EDID D/L

Start

FHD(8 bit)

44(HDMI1) 34(HDMI2)

Reset

HDMI

ⓐ

Only for training and service purposes

- 9 -

5. White Balance Adjustment

5.1. Overview

5.1.1. W/B adj. Objective & How-it-works

(1) Objective: To reduce each Panel’s W/B deviation (2) How-it-works: When R/G/B gain in the OSD is at 192, it

means the panel is at its Full Dynamic Range. In order to prevent saturation of Full Dynamic range and data, one of R/G/B is fixed at 192, and the other two is lowered to find the desired value.

(3) Adj. condition: normal temperature

1) Surrounding Temperature: 25 °C ± 5 °C

2) Warm-up time: About 5 Min◦

3) Surrounding Humidity: 20% ~ 80%

4) Before White balance adjustment, Keep power on status, don’t power off.

5.1.2. Adj. condition and cautionary items

(1) Lighting condition in surrounding area surrounding lighting

should be lower 10 lux. Try to isolate adj. area into dark surrounding. (2) Probe location: Color Analyzer(CA-210) probe should be

within 10 cm and perpendicular of the module surface (80°~ 100°) (3) Aging time

1) After Aging Start, Keep the Power ON status during 5 Minutes.

2) In case of LCD, Back-light on should be checked using no signal or Full-white pattern.

5.2. Equipment

(1) Color Analyzer: CA-210 (NCG: CH 9 / WCG: CH12 / LED:

CH14) (2) Adj. Computer(During auto adj., RS-232C protocol is needed) (3) Adjust Remote control (4) Video Signal Generator MSPG-925F 720p/204-Gray (Model: 217, Pattern: 49) * Color Analyzer Matrix should be calibrated using CS-1000.

5.3. Equipment connection

Color Analyzer

Probe

RS- 232C

Pattern Generator

Signal Source

* If TV internal pattern is used, not needed

** RS-232C Connection Method.

LB56G/LB56H → RGB cable or 3P H/P cable → UART Jig → RS232C cable and USB AM-BM cable → PC

RS-232C

Computer

RS-232C

5.4. Adjustment Command (Protocol)

(1) RS-232C Command used during auto-adj.

RS-232C COMMAND

CMD D ATA ID

wb 00 00 Begin White Balance adjustment

wb 00 ff

End White Balance adjustment (internal pattern disappears)

Explanation

(2) Adjustment Map

Adj. item

R Gain j g 00 C0 172 G Gain j h 00 C0 192

Cool

Medium

.

Warm

B Gain j i 00 C0 192 R Cut 64 G Cut 64 B Cut 64 R Gain j a 00 C0 192 G Gain j b 00 C0 192 B Gain j c 00 C0 192 R Cut 64 G Cut 64 B Cut 64 R Gain j d 00 C0 192 G Gain j e 00 C0 192 B Gain j f 00 C0 192 R Cut 64 G Cut 64 B Cut 64

Command

(lower caseASCII) CMD1 CMD2 MIN MAX

Data Range

(Hex.)

Default

(Decimal)

5.5. Adjustment method

5.5.1. Auto WB calibration

(1) Set TV in ADJ mode using P-Only key(or POWER ON key). (2) Place optical probe on the center of the display.

- It need to check probe condition of zero calibration before adjustment.

(3) Connect RS-232C Cable (4) Select mode in ADJ Program and begin a adjustment. (5) When WB adjustment is completed with OK message, check

adjustment status of pre-set mode.(Cool, Medium, Warm)

(6) Remove probe and RS-232C cable.

▪ W/B Adj. must begin as start command “wb 00 00” , and

finish as end command “wb 00 ff”, and Adj. offset if need.

5.5.2. LED White balance table

- If Model is Polaris Model, G-gain fix is applied.

(1) Cool Mode

1) Purpose : Especially G-gain fix adjust leads to the luminance enhancement. Adjust the color temperature to reduce the deviation of the module color temperature.

2) Principle: To adjust the white balance without the saturation,

- Adjust the G gain more than 172 (If R gain or G gain is more than 255, G gain can adjust less than 172) and change the others(R/B Gain).(20LB45X model)

- Fix the G gain to 172(default data) and change the others(R/B Gain).(over 22inch model)

3) Adjustment mode : mode - Cool

Only for training and service purposes

- 10 -

(2) Medium / Warm Mode

1) Purpose : Adjust the color temperature to reduce the deviation of the module color temperature.

2) Principle: To adjust the white balance without the saturation,

- In Medium mode, Fix to G gain to 192 and change the others(R/B Gain)(20LB45X model)

- Fix the one of R/G/B gain to 192(default data) and decrease the others.

3) Adjustment mode : Two modes - Medium / Warm

5.6. Reference(White Balance Adjustment coordinate and color temperature)

(1) Luminance: 204 Gray, 80IRE (2) Standard color coordinate and temperature using CS-1000

(over 26 inch)

■ The spec of color temperatre and coordinate for Auto W/B.

Model Mode Color Temp. Color coordinate Remark

32LF5XXA (BOE/CSOT)

32~49LF5XXA (LGD)

* Note : x,y coordinates are drifted about 0.007 after 30 mins

Cool

(C50)

Medium

Warm (W50)

13,000 K

9,300 K

(0)

6,500 K

Refer to below W/B table in process of

x = 0.278 (± 0.002) y = 0.280 (± 0.002)

x = 0.293 (± 0.002) y = 0.299 (± 0.002)

x = 0.320 (± 0.002) y = 0.339 (± 0.002)

aging time.

* Test signal

- Inner pattern for W/B adjust

- External white pattern (85IRE, 204gray)

heat-run. So checking color coordinate within 5-min at total assembly line, consider x,y coordinates might be up to 0.007 than x,y target of each color temperature.

6. Tool Option setting & Inspection per countries

(1) Press 'IN START' key at Factory Service remote control. (2) Select 'Tool Option 1'. (3) Punch in the number and press 'OK'. (Each of models has

their number) (4) Correct 'Tool Option2' ~ 'Tool Option5'. (5) Completed adjusting Tool option.

7. Ship-out mode check (In-stop)

▪ After final inspection, press In-Stop key of the Adjustemnt

Remote Control and check that the unit goes to Stand-by mode.

8. AUDIO output check

8.1. Audio input condition

(1) RF input: Mono, 1 KHz sine wave signal, 100% Modulation (2) CVBS, Component: 1 KHz sine wave signal (0.4 Vrms)

8.2. Specification

Item Min Typ Max Unit Remark

Audio practical max Output, L/R (Distortion =10% max Output)

4.5 5.0 6.0

(1) Measurement condition

W

- EQ/AVL/Clear Voice: Off

Vrms

(2) Speaker (8 Ω Impedance)

● W/B Table in process of aging time

- 32”~49” LGD Module(except 32/43LF51 LGD)

(normal line)

Aging time Cool Medium Warm

color coordinate x y x y x y

Target 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

- AUO /INX/ COST / SHARP / BOE / 32/43LF51 LGD Module which cool 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

9. GND and HI-POT Test

9.1. GND & HI-POT auto-check preparation

(1) Check the POWER CABLE and SIGNAL CABE insertion

condition

9.2. GND & 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) GND Test (Auto)

- If Test is failed, Buzzer operates.

- If Test is passed, execute next process (Hi-pot test). (Remove A/V CORD from A/V JACK BOX) (5) HI-POT test (Auto)

- If Test is failed, Buzzer operates.

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

process automatically.

9.3. Checkpoint

(1) Test voltage

- GND: 1.5 KV / min at 100 mA

- SIGNAL: 3 KV / min at 100 mA (2) TEST time: 1 second (3) TEST POINT

- GND Test = POWER CORD GND and SIGNAL CABLE

GND.

- Hi-pot Test = POWER CORD GND and LIVE &

NEUTRAL.

(4) LEAKAGE CURRENT: At 0.5 mArms

Only for training and service purposes

- 11 -

10. USB S/W Download

(optional, Service only)

* Warning : Do not Download on Power only mode

(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 older than that of TV set, it didn’t work.

Otherwise USB data is automatically detected. (3) Show the message “Copying files from memory”.

(4) Updating is starting.

11. Optional adjustments

11.1. Manual ADC Calibration

■ Enter ‘EZ ADJUST’ mode by pressing ‘ADJ’ key.

■ Enter Internal ADC calibration mode by pressing ‘OK’ key at

‘3. ADC CALIBRATION’



* Caution: Using ‘P-ONLY’ button of the Factory Service

remote control when turns TV on.

● If you can’t success ADJUST ADC, please confirm ‘Support Int. ADC’ at TOOL OPTION2.

11.2. Manual White balance Adjustment

11.2.1. Adj. condition and cautionary items

(1) Lighting condition in surrounding area surrounding lighting

should be lower 10 lux. Try to isolate adj. area into dark surrounding.

(2) Probe location: Color Analyzer (CA-210) probe should be

within 10cm and perpendicular of the module surface. (80°~ 100°) (3) Aging time

1) After Aging Start, Keep the Power ON status during 5 Minutes.

2) In case of LCD, Back-light on should be checked using no signal or Full-white pattern.

(5) Updating Completed, the TV will restart automatically. (6) If your TV is turned on, check your updated version and

Tool option.

* If downloading version is more new 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 "Tool Option 1" and push "OK" key.

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

Only for training and service purposes

11.2.2. Equipment

(1) Color Analyzer: CA-210 (NCG: CH 9 / WCG: CH12 / LED:

CH14) (2) Adj. Computer(During auto adj., RS-232C protocol is needed) (3) Adjust Remot control (4) Video Signal Generator MSPG-925F 720p/216-Gray (Model: 217, Pattern: 78)

11.2.3. Adjustment

(1) Set TV in Adj. mode using POWER ON. (2) Zero Calibrate the probe of Color Analyzer, then place it on

the center of LCD module within 10cm of the surface.

(3) Press ADJ key → EZ adjust using adj. R/C → 6. White-

Balance then press the cursor to the right (Key►). When

Key(►) is pressed 216 Gray internal pattern will be

displayed. (4) One of R Gain / G Gain / B Gain should be fixed at 192,

and the rest will be lowered to meet the desired value. (5) Adj. is performed in COOL, MEDIUM, WARM 3 modes of

color temperature.

■ If internal pattern is not available, use RF input. In EZ Adj.

menu 6.White Balance, you can select one of 2 Test-pattern: ON, OFF. Default is inner(ON). By selecting OFF, you can adjust using RF signal in 216 Gray pattern.

- 12 -

■ Disassembly of Back cover

DISASSEMBLY

(1) Unscrew bolts in the set.

(2) Check both right and left hole.

(4) Put ‘long nose’ into the hole.

(5) Open B/C with push/pulling long

nose to upper and lower sides.

(3) Attach tape to ‘Long nose pliers’.

* Scratch can be caused without tape.

Only for training and service purposes

- 13 -

(6) Disassemble Back cover.

* Disassemble it from left to right for top

side hook on Back cover

BLOCK DIAGRAM

JK204

7

IF_N

6

IF_P

USB_5V

IF_AGC

Tuner SDA

Tuner SCL

4

3

USB_DP

USB_DN

IR Board

3.3V_ST

Led_PWR

108

KEY2

110

P450

KEY1

111

IR

117

98

99

44

IR/KEY

24Mhz

43

40

39

5

52

53

45

TUNER

Audio R-Out

Audio L-Out

37 38

26,33,34 27,35,36 22,20,24,33,34

7

5

B+

TU_3.3V

Out

Panel_Vcc

Audio

IC301

x4 Gain

OP-AMP

AV2 In

AV1 In

Comp. R/L In

Y,Pb,Pr In

3.3V_M

JK101

P600/601

XXX

IC500

MST6841XP

Module

LVDS

Output

RL On

P Dim

12 1

11

P700

POWER BOARD

4,5,6

7,8

Inv. ON

Panel_Vcc

Q704

DMP2130L

102 105 101

SPI_CLK

SPI_DI

94

97

95

IC502

Serial Flash

3.3V_ST

D13.2V

A13.2V

100

42

18

107

To USB

BD9D321EFJ

54

30

116

62

9

41

77

3.3V_M

Q705

3.3V_ST

1.2V_VDDC

IC700

IC702

BD9D321EFJ

DMP2130L

BD9D321EFJ

SPI_CZ

SPI_DO

EEP SCL

EEP SDA

96

85

84

IC503

8Mbytes

EEPROM

+5V_USB

IC701

48

Main_1.8V

IC703

XXX

HDMI

50

51 113 112

115

I2S_WS

I2S_SCK

I2S_MCLK

7 8 9

1.8V REG

3.3V_M

35

40

19

32

31

SCL/SDA

I2S_SDO

38

NTP7514

Sound AMP

20

33

(

JK203

Audio_SCL

Audio_SDA

10 11

IC300

21

18

30

LPF

P301

(

Only for training and service purposes

- 14 -

400

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.

900

901

LV1

200

540

800

500

120

121

A10

A2

701

700

Set + Stand

Only for training and service purposes

- 15 -

EAX66783401

LGE Internal Use Only

LB56H/LT56H

COMPONENT / AV IN / AV AUDIO OUT

JK101

PPJ239-26

[RD4]E-LUG

6H

[RD4]O-SPRING

5H

4H

5G

4F

AV2RIN

[RD4]CONTACT

[WH3]O-SPRING

AV2LIN

[YL]CONTACT

VA109 20V

VA108

20V

R108 220K

R107 220K

R115

10K

R114

10K

R119 12K

R118

12K

C107 470pF 50V

C106 470pF 50V

AV2_RIN

AV2_LIN

COMMONLIN

[YL]O-SPRING

5F

[YL]E-LUG-S

7F

[RD3]O-SPRING

5E

[RD3]E-LUG-S

7E

[WH2]O-SPRING

5D

[WH2]E-LUG

6D

[RD2]E-LUG

6N

[RD2]O-SPRING

COMMONRIN

5N

[RD2]CONTACT

4N

[WH1]O-SPRING

5M

[RD1]O-SPRING

5L

[RD1]E-LUG-S

7L

[BL]O-SPRING

5K

COMP_PB

MNTROUT

MNTLOUT

COMP_PR

AV2_VIN

COMP_AV2_Zener_KEC

ZD106-*1

5.6V

COMP_AV2_Zener_KEC

VA10 0

COMP_AV2_Zener_KEC

ZD104-*1

5.6V

COMP_AV2_Zener_KEC

5.6V

ZD107-*1

20V

VA10 1

20V

5.6V

ZD105-*1

COMP_AV2_Zener_ROHM

C101 5600pF 50V

C100 5600pF 50V

COMP_AV2_Zener_ROHM

ZD107

COMP_AV2_Zener_ROHM

ZD106

R105

1K

C

B

E

READY Q101

MMBT3904(NXP)

R112

1K

C

B

E

READY Q100

MMBT3904(NXP)

R104

VA106

220K

20V

R103

VA105

220K

20V

ZD105

COMP_AV2_Zener_ROHM

ZD104

C E

R111

10K

R110

10K

VA104

SD05

READY

VA107

SD05

READY

Q103

MMBT3904(NXP)

B

C

B

E

C105

10uF

16V

C104

10uF

16V

Q102

MMBT3904(NXP)

R117 12K

R116

12K

POP NOISE

R102

75

POP NOISE

C103 470pF 50V

C102 470pF 50V

R113

75 3216 1/4W

1%

Size check!!

MNT_ROUT

MUTE_AOUT

MNT_LOUT

MUTE_AOUT

COMMON_RIN

COMMON_LIN

AV2_VIN

COMP_PR

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.

INPUT1

[BL]E-LUG-S

7K

[YL/GN]CONTACT

4J

[YL/GN]O-SPRING

5J

[YL/GN]E-LUG

6J

COMMON_VIN

COMP_AV2_Zener_KEC

ZD103-*1

ZD102-*1

5.6V

COMP_AV2_Zener_KEC

5.6V

ZD101-*1

ZD100-*1

5.6V

COMP_AV2_Zener_KEC

5.6V ZD103

COMP_AV2_Zener_ROHM

ZD102

COMP_AV2_Zener_ROHM

ZD101

COMP_AV2_Zener_ROHM

ZD100

COMP_AV2_Zener_ROHM

VA103

SD05

READY

R101

75

COMMON_VIN

COMP_PB

R109

VA102

SD05

75 3216

1/4W

1%

Size check!!

V-OUT Buffer(DEBUG)

+12V

MMBT3904(NXP) Q104

C

B

AV2_VIN

OPT

R120

JP110

0

OPT

R121 75

E

OPT

R122

220

L15.5_ECI_M8RR 2015/03/03

COMP/AV

OPT

R123

33

OPT

MNT_VOUT

1 8

EAX66783401

LGE Internal Use Only

LB56H/LT56H

I2C Control

JK201

PEJ034-01

3

4

5

7B

6B

E_SPRING

R_SPRING

T_SPRING

B_TERMINAL2

T_TERMINAL2

DSUB_SCL

DSUB_SDA

AR201

100

1/16W

+3.3V_ST

R862 33

12507WS-04L

1

2

3

4

P201

5

ESD_HDMI_IP4294

HDMI(REAR)

AR204

5.1 1/16W

AR203

5.1 1/16W

B

C

Q201

MMBT3904(NXP)

E

R219 100

R220 100

R206

HDMI1_HPD

SHIELD

20

HPD

19

+5V_POWER

18

DDC/CEC_GND

17

SDA

16

SCL

15

NC

14

CEC

13

CLK-

12

CLK_SHIELD

11

CLK+

10

DATA0-

9

DATA0_SHIELD

8

DATA0+

7

DATA1-

6

DATA1_SHIELD

5

DATA1+

4

DATA2-

3

DATA2_SHIELD

2

DATA2+

1

10K

JK203

This GND Pattern should be very narrow HDMI Jack burnt problem improvement

5

READY

VA202

R208 1K

TMDS_CH1-

TMDS_CH1+

GND_1

TMDS_CH2-

TMDS_CH2+

TMDS_CH1-

TMDS_CH1+

GND_1

TMDS_CH2-

TMDS_CH2+

D205

IP4283CZ10-TBA ESD_HDMI2_IP4283

1

2

3

4

5

D204

IP4283CZ10-TBA

ESD_HDMI2_IP4283

1

2

3

4

5

VA203 READY

NC_4

10

NC_3

9

GND_2

8

NC_2

7

NC_1

6

NC_4

10

NC_3

9

GND_2

8

NC_2

7

NC_1

6

D204-*1 IP4294CZ10-TBR

1 2 3 4 5

VA206

READY

ESD_HDMI_IP4294

10 9 8 7 6

+5V_USB

R215

R216

4.7K

D205-*1 IP4294CZ10-TBR

10

1

9

2 3

8

4

7 6

5

VA207

READY

HDMI1_CKHDMI1_CK+

HDMI1_D0HDMI1_D0+

HDMI1_D1HDMI1_D1+

HDMI1_D2HDMI1_D2+

HDMI1_SDA HDMI1_SCL

USB(REAR)

Close to SIDE_USB

USB_DN

USB_DP

OPT

C200 10uF 10V

C201 22uF 10V

JK204

US-04A-VSD

5

1

2

3

4

READY D200

30V

READY D201

30V

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.

INPUT2

L200

120OHM

+5V_USB

L155_ECI_M8RR

INPUT

2015/03/03

2 8

EAX66453201

LGE Internal Use Only

LB56H/LT56H

AUAMP/VCOM_SDA

AUAMP/VCOM_SCL

AUAMP/VCOM_SDA

AUAMP/VCOM_SCL

+3.3V_M

I2S_SDO

I2S_WS

I2S_SCK

R300

4.7K

+19V

R301

4.7K

+19V_AMP

L306

R303 100

R302 100

C340

0.1uF 50V

SW_RESET

C307

1000pF

50V

I2S_MCLK

16V

NC_1

NC_2

GND NC_3 DVDD

SDATA

WCK

BCK

SDA

R308 100

VDD_IO

[EP]GND

1 2 3 4 5 6 7 8 9 10

SCL

CLK_I

GND_IO

39

40

THERMAL

41

11

12

38

13

L300

+3.3V_M

BLM18PG121SN1D

C305 10uF

6.3V

C306

0.1uF

VDD_PLL

C304

0.1uF 16V

OPT

C301

C303

0.1uF 1uF

16V

10V

R306 100

R304 100

R305 100

C300

C302

33pF

50V

FAULT

MONITOR_0

50V

C309

22000pF

PGND1A

BST1A

RESET

AD

34

35

36

37

IC300

NTP7514

0x54

14

15

16

17

BST2B

PGND2B

MONITOR_1

MONITOR_2

C308

22000pF

50V

PVDD1A

OUT1A

32

33

18

19

OUT2B

PVDD2B20PVDD2A

PVDD1B

31

30 29 28 27 26 25 24 23 22 21

+19V_AMP

C310

0.1uF 50V

OUT1B PGND1B BST1B VDR1 NC_4 AGND VDR2 BST2A PGND2A OUT2A

C311

0.1uF 50V

C312 10uF 25V

+19V_AMP

C313 10uF 25V

C315 22000pF 50V

C314 22000pF 50V

C31 6 1uF 10V

R312

12

C320 390pF

50V C319

390pF

50V

R311

12

R310

12

C318 390pF

50V

C317 390pF

50V

R309

12

C321 1uF 10V

R316

R315

12

R314

12

R313

12

L304 10uH

L303 10uH

L301 10uH

L302 10uH

C327

0.47uF 50V

C326

0.47uF 50V

C333

0.1uF 50V

C332

0.1uF 50V

C331

0.1uF

50V

C330

0.1uF 50V

R330

4.7K

R329

4.7K

R328

4.7K

R327

4.7K

SPK_L+

SPEAKER_L

SPK_L-

SPK_L+ SPK_LSPK_R+ SPK_R-

SPK_R+

SPEAKER_R

SPK_R-

JP302

JP303

JP300

JP301

SPK_L+

SPK_L-

SPK_R+

SPK_R-

4

3

2

1 .

250A1-WR-H04M

P300

POWER_DET

READY

R307

100

AUDIO_OUT AMP : GAIN X 4

IC301

AS324MTR-E1

MNT_LOUT

MNT_ROUT

C323

0.1uF 25V

C322

0.1uF 25V

+12V

Q301 MMBT3904(NXP)

C

B

E

R318

4.7K

MNT_L_AMP

MNT_R_AMP

+12V

Q300 MMBT3904(NXP)

C

B

E

R31 7

4.7 K

R320 1K

C325 6800pF 50V

R319

C324 6800pF 50V

R323 5.6K

1K

10K

R324

C329 33pF 50V

R322 5.6K

33pF

C328

R321

10K

1 OUT1

2 INPUT1-

R326

6.8K

3 INPUT1+

+12V

C334

0.1uF 25V

4 VCC

5 INPUT2+

50V

6 INPUT2-

R325

6.8K

7 OUT2 8OUT3

14OUT4

13INPUT4-

12INPUT4+

11GND

10INPUT3+

9INPUT3-

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.

AUDIO

155_ECI_M8RR

AUDIO

2015/03/03

3 8

EAX66783401

LGE Internal Use Only

LB56H

IF

9

SHIELD

TU401 TDJS-G101D

SCL

1

SDA

2

B[+3.3V]

3

NC_1

4

IF_AGC

5

NC_2

6

IF[N]

7

IF[P]

8

C401 47pF 50V

C402 47pF 50V

R401

10

R402

Close to the tuner

10

+3.3V_TU

R403

33

R404

33

close to the tuner pin.

C404

C405

100pF

0.1uF

50V

16V

R405

C403

0.1uF 16V

100

R406

2.2K

R407

2.2K

C406 22uF

6.3V

should be guarded by ground

TUNER_SCL

TUNER_SDA

IF_AGC

+3.3V_TU

C407

0.1uF 16V

IF_P

IF_N

L401

BLM18PG121SN1D

C408 10uF

6.3V

+3.3V_M

KEY1 KEY2

PZ1608U121-2R0TF

LED

AR401 10K 1/16W

+3.3V_ST

OPT

C409

0.1uF 16V

+3.3V_ST

L402

C410

0.1uF 16V

OPT

VR401

C411

1000pF

R408 100

50V

OPT

VR402

IR

C412

100pF

+3.3V_ST

OPT

R409

3.3K

50V

OPT

VR403

P401

12507WR-06L

1

2

3

4

5

6

7

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.

TUNER & IR

155_ECI_M8RR

TUNER & IR

2015/03/03

4 8

EAX66783401

LGE Internal Use Only

LB56H/LT56H

RX0P_D

DDCDD_DA

RX1N_D

RX1P_D

[EP]

VDDC_3.3

AV2_VIN

C503

0.1uF

COMMON_VIN

MNT_L_AMP MNT_R_AMP

R500

33

C501

220pF

C500 220pF

HDMI1_HPD

HDMI1_CK-

HDMI1_CK+

HDMI1_D0-

HDMI1_D0+

HDMI1_D1-

HDMI1_D1+

HDMI1_SDA

HDMI1_D2-

HDMI1_D2+

HDMI1_SCL

COMP_PB

C502

0.047uF

COMMON_LIN

COMMON_RIN

VDDC_3.3

R504

33

R505

33

COMP_PR

R503

33

MNT_VOUT

AV2_LIN

AV2_RIN

R502 220K

R506 100

R507 100

R501 220K

VDDC

C514

0.1uF

C508 1000pF

C509

0.047uF

R509

33

C507

0.047uF

AU_3.3V

L500

120-ohm

C505 2.2uF

C506

2.2uF

C521

0.1uF

C520

R510

0.047uF

33

C513

0.047uF

C516 10uF

C511 2.2uF

C512

2.2uF

DDCDD_CK

HOTPLUG_A

AVDD_MOD_1

DDCDA_DA

DDCDA_CK

AVDD3P3_ADC

C522

R512

68

0.047uF

C519

R511

68

0.047uF

C518

0.1uF

C517

0.1uF

RX2N_D RX2P_D

RXCKN_A RXCKP_A

RX0N_A RX0P_A

RX1N_A RX1P_A

RX2N_A RX2P_A

ARC VDD

HSYNC1

BIN1P

SOGIN1

GIN1P GIN1M RIN1P

VSYNC1

CVBS1 CVBS0

VCOM

CVBSOUT1

AVDD_AU33

AUREF

VAG

LINEIN_L1 LINEIN_R1 LINEIN_L3 LINEIN_R3 LINEOUTL3 LINEOUTR3

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38

128

39

XTALO40XTALI

C515

C504

8pF

X-TAL_2

C510

8pF

Closed to SoC

X500

24MHz

GND_21X-TAL_1

4

GND_1

2

3

R508 1M

3.3V_DMPLL

0.1uF

AVDD33_DEMOD

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES

C524

C523 33pF

C525

0.1uF

R513

100

0.1uF

50V

IF_P

OPT

C526 220pF

L501 100NH

OPT

50V

R514

100

C528

0.1uF

Close to MSTAR

IF_N

SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.

MAIN SOC

125

126

127

THERMAL

129

LGE6841 (ATV_13)

41

42

AVDD3P3_DADC

AVDD3P3_DMPLL

+3.3V_M

C527 33pF

RXCKN_D

RXCKP_D

RX0N_D

123

124

43

VIFP44VIFM

IFAGC

R515

10K

R516

0

IF_AGC

GND

HOTPLUG_D

120

121

122

45

46

47

VSS

AVDD_DDR

C530

0.1uF

AVDD_DDR

C529 22000pF 50V

Close to MSTAR

MUTE_AOUT

IR

HW_RESET

CEC

HWRESET

118

119

I2S_MCLK

+3.3V_ST

R520

4.7K

R519

100

R518

1K

GPIO68

GPIO70

IRIN

GPIO69/I2S_OUT_MCK

115

116

117

IC500

48

49

50

51

52

GPIO56

GPIO6053GPIO61

GPIO55/I2S_OUT_WS

GPIO57/I2S_OUT_BCK

R521

R517

100

GPIO58/I2S_OUT_SD

I2S_SCK

I2S_WS

I2S_SDO

TUNER_SCL

C531

0.1uF

SW_RESET

AUAMP/VCOM_SCL

AUAMP/VCOM_SDA

KEY1

R526

R523

100

R522

100

SAR0/GPIO75

SAR1/GPIO74

SAR2/GPIO73

SAR3/GPIO72

111

112

113

114

54

55

56

VDDP

LVA4P57LVA4M58LVA3P59LVA3M

VDDC_1

TUNER_SDA

C532

0.1uF

VDDC

VDDC_3.3

+3.3V_ST

R528

4.7K

KEY2

LED

AVDD_DDR

C533

0.1uF

R529

R527

22

1K

DDCA_DA

GPIO67

AVDD_DDR_2

107

108

109

110

60

LVACLKP

RXA3+

RXA3-

RXACK+

RXA3+

RXA3-

RXACK+

4.7K

R531

PWM_DIM

DSUB_SCL

DSUB_SDA

R534

1K

R530

R533

22

DDCA_CK

106

61

TESTPIN

PWM0/GPIO26

PWM1/GPIO25

104

105

62

63

LVA2P64LVA2M

LVACLKM

AVDD_MOD_2

RXA2+

RXACK-

C534

0.1uF

VDDC_3.3

RXA2-

RXA2+

R532

103

102 101 100

RXA2-

0

99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65

GPIO64 GPIO63

AVDD_MOD_4

USB0_DP USB0_DM SPI_CZ SPI_DO SPI_DI SPI_CK

PWM3/GPIO25 PWM2/GPIO24

GPIO0 GPIO1 GPIO2 GPIO3 GPIO4 GPIO5 GPIO6 GPIO7

INT/GPIO65

VDDC_2 LVB0M LVB0P LVB1M LVB1P

AVDD_MOD_3

LVB2M LVB2P LVBCKM LVBCKP LVB3M LVB3P LVB4M LVB4P LVA0M LVA0P LVA1M LVA1P

*H/W OPTION

C535

0.1uF

R540

100

R538

4.7K

R536

4.7K

R537

100

R535

10K

R539

100

POWER_SW

RXB0-

RXB0+

RXB1-

RXB1+

RXB2-

RXB2+

RXBCK-

RXBCK+

RXB3-

RXB3+

RXA0-

RXA0+

RXA1-

RXA1+

INV_ON

RL_ON

VDDC_3.3

RXB0-

RXB0+

RXB1-

RXB1+

RXB2-

RXB2+

RXBCK-

RXBCK+

RXB3-

RXB3+

RXA0-

RXA0+

RXA1-

RXA1+

HD FHD

LOW

+3.3V_M

SPI_CZ

SPI_DO

SPI_DI

SPI_CLK

FLASH_WP

HW_OPT2

POWER_SW

EEP_SDA

POWER_DET

VDDC

VDDC_3.3

HW_OPT1

SMALL INCH

BIG INCH

FHD

C537

0.1uF

C536

0.1uF

R543

4.7K

HD

R542

4.7K

USB_DP

USB_DN

PANEL_ON

HW_OPT1

EEP_SCL

HIGHHW_OPT

+3.3V_M

R545

4.7K

R544

4.7K

HW_OPT2

FLASH_WP

SO/SIO1

GND

155_ECI_M8RR

MSTAR Vcc

+1.2V_VDDC

+1.8V_M

+3.3V_ST

L503

120-ohm

L502

120-ohm

EEPROM(64K)

A0

A1

A2

GND

SERIAL FLASH(2MB)

10K

R549

SPI_CZ

SPI_DO

CS

1

2

WP

3

4

8

7

6

5

VCC

HOLD

SCLK

SI/SIO0

H/W RESET

+3.3V_ST

MAIN SOC 5 8

ST 1.26V

VDDC

C541

10uF

6.3V

C540 10uF

6.3V

L507

120-ohm

C546

10uF

6.3V

L506

120-ohm

C545

10uF

L504

120-ohm

6.3V

C544

10uF

L505

6.3V

120-ohm

C543

10uF

6.3V

IC503

BR24G256FJ-3

1

2

3

4

8

7

6

5

ROHM_EEPROM

R552

100

DO[IO1]

R551

100

WP[IO2]

R550

100

IC502-*1

MX25L6406EM2I-12G MACRONIX

R553

470

C542

4.7uF 10V

C547

4.7uF

+3.3V_ST

VCC

WP

SCL

SDA

C548 22pF

READY

W25Q64FVSSIG

CS

1

2

3

GND

4

10K

R554

R555

470K

DDR 1.8V

AVDD_DDR

ST 3.3V

VDDC_3.3

AVDD33_DEMOD

AU_3.3V

3.3V_DMPLL

C549

0.1uF 16V

R557

C551

R558

22pF

READY

WINBOND

IC502

8

7

6

5

R556

10

C550

0.1uF 16V

AT24C256C-SSHL-T

A0

A1

A2

GND

R559

4.7K

22

+3.3V_ST

VCC

%HOLD[IO3]

CLK

DI[IO0]

C538

0.1uF

16V

2015/03/03

IC503-*1

1

2

3

4

ATML_EEPROM

R560

4.7K

C552

0.1uF 16V

READY

R562

100 R561

100

VCC

8

WP

7

SCL

6

SDA

5

C553

0.1uF 16V

POWER_DET

IC503-*2

M24256-BRMN6TP

E0

VCC

1

8

WC

E1

7

2

SCL

E2

6

3

VSS

SDA

4

5

ST_EEPROM

EEP_SCL EEP_SDA

SPI_CLK

SPI_DI

HW_RESET

EAX66783401

LGE Internal Use Only

LB56H/LT56H

FHD

P600

SP14-11592-01-51Pin

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

VCOM_SDA VCOM_SCL

RXA3+ RXA3-

RXACK+

RXACK-

RXA2+

RXA2-

RXA1+ RXA1-

RXA0+ RXA0-

RXB3+ RXB3-

RXBCK+

RXBCK-

RXB2+ RXB2-

RXB1+ RXB1-

RXB0+ RXB0-

C600

0.1uF 16V

OPT C601 1000pF 50V

PANEL_VCC

C602 10uF 16V

L600

120OHM

HD_PANEL_VCC

V-COM I2C

VCOM_SDA

VCOM_SCL

P601

10031HR-30

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

RXA3+

RXA3-

RXACK+

RXACK-

RXA2+

RXA2-

RXA1+

RXA1-

RXA0+

RXA0-

OPT

R601 0

R602 0 OPT

VCOM_SDA

VCOM_SCL

HD_PANEL_VCC

AUAMP/VCOM_SDA

AUAMP/VCOM_SCL

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.

LVDS

155_ECI_M8RR

LVDS

2015/03/03

6 8

EAX66783401

LGE Internal Use Only

LB56H/LT56H

JK701

KJA-DC-1-0032

4

2

1

Surge protection

D701

20V

R739

R740

33K

120K

L705

CIS21J121

OPT

C741 10uF 25V

Q701 SSM3J332R

S

G

D

+19V

C740

68uF

35V

OPT

+19V to +3.3V_STANDBY

MP2315GJ

R703

AAM

C705 68uF 35V

C706 10uF 25V

C707

0.1uF 25V

47K

1

IN

2

SW

3

GND

4

+12V

IC704

NEW

3A

8

7

6

5

FB

VCC

EN/SYNC

BST

0.1uF

C712

20130528 cJ.LIM

R710

68

50V

R713 100K

R712

** Jig Point_GND

JP708

JP706

JP707

JP709

** 3.3V_ST -> 1.26V VDDC

+3.3V_ST

R736

1

1/4W

R735

1/4W

R734

R730 56K

+3.3V_ST

L703 10uH

C728 10uF

C729 22uF

10V

C725 10uF

C717

0.1uF

20K

25V

10V

X5R => X7R

To improve CST Issue

2013.12.21 by GH.Song

C730

0.1uF 25V

R73 3

R73 2

1.2 K

R73 1

ZD704

2K

5V

1%

1K 1%

2013.08.07

5.6B->5V OPT->APPLY

10K

C739

0.1uF 16V OPT

** 3.3V_M -> 1.8V_M

AP7173-SPG-13 HF(DIODES)

1

C734 10uF

IN

PG

10V

VCC

EN

1

2

3

4

V0 = 0.8*(1+(R2/R1))

IC705

[EP]

OUT

8

FB

9

7

THERMAL

SS

6

GND

5

+3.3V_M

C727

C726

0.1uF

10uF

16V

6.3V

C736 560pF

50V

AP1117E18G-13

IN

3

IC703

2

OUT

C733 10uF

6.3V

R738

2.7K

1%

R737

4.7K

1%

R2

R1

ADJ/GND

1

C738 10uF 10V

+1.2V_VDDC

OPT ZD706

2.5V

+1.8V_M

OPT

ZD702

2.5V

Add for improving main IC burnt issue

OPT

ZD705

5.1v

+19V

19V TO PANEL VCC(12V) DCDC CONVERTER

IC701

MP2315GJ

R701

AAM

C702 10uF 25V

C704

0.1uF 25V

100K

1

IN

2

NEW

SW

3

3A

GND

4

** 19V -> 5V_USB

AAM

GND

IN

SW

IC702

MP2315GJ

1

2

MPS

3

3A

4

+19V

C701

2.2uF 25V

C703

0.1uF 50V

R702 47K

8

7

6

5

FB

VCC

EN/SYNC

BST

8

7

6

5

20130528 cJ.LIM

R704 68

C708

0.1uF 50V

FB

VCC

EN/SYNC

BST

C709

0.1uF

R705

50V

R71 8

1%

C724

+12V

11K

1%

1K

15V

OPT

ZD701

+5V_USB

** +3.3V_ST -> 3.3V_M

+3.3V_ST

R724 33K

OPT R720

10K

R723

2.2K

POWER_SW

R719

R706

10K

OPT

10K

B

C

Q703 MMBT3904(NXP)

E

FET_3.3V_TOSHIBA

Q705

SSM3J332R

S

C732

4.7uF 10V

D

G

Q705-*1

FET_3.3V_AOS

S

AO3435

G

BOOST_EN

L709

PZ1608U121-2R0TF

C735

0.1uF

16V

D

+3.3V_M

C737 10uF

6.3V

OPT

ZD703

5V

** Switch Panel-Vcc

R72 9

820

16V

R72 6

4.7 K

R72 5

1%

1K 1%

+12V

L706

UBW2012-121F

PANEL_ON

OPT

C720

0.1uF 25V

R722

33K

R721 120K

B

C

Q702 MMBT3904(NXP)

E

GND

FET_12V_TOSHIBA

C731

0.22uF 25V

Q704

SSM3J332R

S

G

Q704-*1

D

AO3435

S

FET_12V_AOS

G

PANEL_VCC

OPT

R728

R727

5.6K

D

5.6K

C721 10uF 25V

R711

OPT

C711

0.47uF

OPT R707 47K

+3.3V_M

R709

10K

R708

10K

68

10K

16V

L701

10uH

C710

0.1uF 25V

C714

C713

0.1uF

0.1uF 16V

16V

C715 10uF

POWER_SW

R715

56K

R714

56K

L702

4.7uH

C719 10uF

C722

0.1uF 25V

16V

C718 10uF

10V

C723 10uF

R71 7

3.3 K

R71 6

0.1uF

10V

C716 10uF

16V

Vout=0.765*(1+R1/R2)

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.

POWER

155_ECI_M8RR

2015/03/03

7 8POWER

OPT

LGE Internal Use Only

0.1uF

C839

OPT

0.1uF C840

OPT

L805

UBW2012-121F

OPT L804

UBW2012-121F

R801 0

1/8W

R802 0

1/8W

R803 0

1/8W

+19V

BOOST_EN

C801 47uF 25V

R804 1K

TOTAL LED DRIVER BLOCK

C803

C802

0.1uF

10uF

50V

25V

OPT

C806 100pF

50V

RC

C807

R807 10K

1/16W

C804

0.033uF 50V

C805

470pF

50V

R805

18K 1%

R806 1K

1%

FIRST BOOST UP

0.22uF

16V

SS

DIS/EN

COMP

FB

IC801

TPS40210DGQR

1

2

THERMAL

3

4

5

R808 180K

1/16W

11

32_43 inch

L807

CIS21J121

120

REDUCE INDUCTOR TEMP ISSUE

32inch

L806

CIS21J121

120

L801 33uH

R809 180K

To Improve EMI Issue

1/16W

[EP]

VDD

10

BP

9

GDRV

8

ISNS

7

GND

6

C808

1uF 25V

C811 100V 220pF

R81047R811

C809

0.1uF 50V

L809

120OHM

C812 100V 220pF

47

R864

3.3

D804

1N4148W-G

C810

330pF

50V

R812

3.9K 1%

121211 1K -> 3.9K 220p -> 330p

A1

C

A2

C814 100V 220pF OPT

R81647R81747R819

R815

3.9K 1%

VOUT = VREF*(1+51K/680) = 0.7 *(1+51K/680) = 53.2V

EXCEPT C500 C501

C815

C813

33uF

100V

47

G

R818

0.1 1W

REDUCE RIPPLE CURRENT

C837

C817

C816

10uF

1uF

33uF 100V

35V

50V

OPT

C818

C838

1uF

10uF

50V

35V OPT

D

Q801 AOD478

S

R820

0.1 1W

R822 100K 1/8W

R823

100K

1/8W

R861

47K

R825

R824

680

1/8W

1%

VOUT#1=49V

+3.3V_M

OPT

R827 10K

R828

INV_ON

1K

10K

49inch

R831-*1 150K

PWM_DIM

BLU_CURRENT_CTL

B

32_43inch

R831 120K

43inch

R837-*1 13K 1%

R830 100

49inch R840-*2

27K 1%

49inch R841-*2

2.7K 1%

R833

R836

3K

1K

C

1%

Q802 MMBT3904(NXP)

E

R835 270K

1/8W 1%

49inch

R837-*2

8.2K 1%

R832 100K

OPT R838 100K

43inch

R840-*1 12K

1%

43inch

R841-*1 10K 1%

C821

100pF

50V

32inch

R837

30K 1%

32inch

10K

33V

R840

15K 1%

32inch

R841

3.6K

1%

R839

100K

R842

ZD801

1%

C822 1000pF 50V

D801

120OHM

MBRD10U100CT

L808

L802 33uH

C826 1000pF 50V

NC_1

PGND_1

PGND_2

PDIM

RISET

NC_2

43_49 inch

EN

OVP

LS8

LS7

LS6

LS5

L803 33uH

R843 100

DT1641AS

1

2

3

4

5

6

7

8

9

10

11

12

R845 100

IC802

To Improve EMI Issue

C829 100V 220pF

C830 100V 220pF

R846

R848

R847

100

[EP]GND

VIN

24

C831 1uF

VREF

25

23

THERMAL

CS

22

NDRV

21

RSS

20

COMP

19

RT

18

LS1

17

LS2

16

LS3

15

LS4

14

LGND

13

R849 100

25V

220K

R854

R850 100

R851

39K 1%

R852

1.5K

+19V

R853

3.3

1/16W

1%

1.5K 1%

1%

R855

C833 100V 220pF

C834 100V 220pF

R856 100

C832 1uF 25V

R857

30K C835

4700pF

50V

1%

C836

0.1uF 25V

R858 100

R859 100

G

UF3D(SUZHOU GRANDE)

32_43 inch

D

49 inch

Q803 SMN630LD

S

D

G

S

R860

0.1

49 inch

D802

D803 BR210

100V

Q803-*1 AOD478 32_43inch

P801

SMAW200-04

1

2

3

VOUT#2

4

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.

C819 33uF

49 inch

R826 0

43_49 inch

C820 33uF

43 inch

R829 0

32_43 inch

R834 0

49 inch

C823

4.7uF 50V

49 inch

C824

4.7uF

50V

49 inch

C825

4.7uF

50V

43_49inch

C827 1uF 100V

49 inch

C828

1uF

100V

32inch

C827-*1

4.7uF 50V

32_43 inch

C828-*1 0

1/4W 5%

49 inch

C842 1uF 100V

49 inch

C841

1uF

100V

LED_DRIVER

2015/03/0315.5_ECI_M8RR

8 8

Trouble shooting guide

LGE Internal Use Only

No. Error symptom (High category) Error symptom (Mid category) Page Remarks

1

A. Video error

No video/Normal audio 1

2 No video/No audio 2

3 Tuning fail, Picture broken/ Freezing 3, 4

4 Color error 5

5

Vertical/Horizontal bar, residual image, light spot, 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

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

Contents of Standard Repair Process

LGE Internal Use Only

Y

N

Move to

No video/No audio

No video

Normal audio

Check Back Light

On with naked eye

Check LVDS 12 V

of Main B/D

Replace T-con B/D

or Module

Replace Main

B/D or Repair parts

Check Main B/D to LED Back light Voltage

Change Module

Replace Main

B/D or Repair parts

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

Replace Main Board Re-enter White Balance value

※Precaution

☞A4 ☞A1

☞A2

☞A3 & A6

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

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

Normal

Audio

On

Y

N

Normal Voltage

Normal

Voltage

Y

N

Y

N

Error Symptom

A. Video Error

Established date

1/14

Content

No video / Normal audio

Revised date

Standard Repair Process

LGE Internal Use Only

Check voltage 19V

of Adaptor

No video /

No audio

Replace Main

B/D or Repair parts

Replace Adaptor

Normal

Voltage

Y

N

Error Symptom

A. Video Error

Established date

2/14

Content

No video / No audio

Revised date

Standard Repair Process

☞A13

LGE Internal Use Only

Y

N

☞ A5

N

Check RF Signal level

Check RF Cable

Connection

1. Reconnection

2. Install Booster

Check

S/W Version

S/W Upgrade

Check whether other equipments have problem or not.

(By connecting RF Cable at other equipment)

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

Replace

Main B/D

Check

Tuner soldering

Y

N

Y

. 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%)

Y

Contact with signal distributor or broadcaster (Cable or Air)

N

Y

N

☞ A6

End

Normal

Signal

Normal

Picture

Normal Picture

Normal

Picture

SVC

Bulletin

End

Normal

Picture

Error Symptom

A. Video Error

Established date

3/14

Content

Tuning fail, Picture broken/freezing

Revised date

Standard Repair Process

LGE Internal Use Only

Y

N

☞ A5

Check RF Signal level

Check

S/W Version

S/W Upgrade

Y

N

Y

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

Y

Change satellite setting

(match with installed ANT)

N

Y

N

☞ A6

Check satellite setting.

- Check LNB frequency

- Check satellite

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

Contact with signal

distributor

or broadcaster

(Cable or Air)

N

Check

Tuner soldering

Replace

Main B/D

Normal

Picture

Normal

Picture

Normal

Setting

SVC

Bulletin

Normal

Signal

End

Error Symptom

A. Video Error

Established date

4/14

Content

Tuning fail, Picture broken/freezing

Revised date

Standard Repair Process

LGE Internal Use Only

Color

error

Y

N

Check and replace Link

Cable

(LVDS) and contact condition

Y

N

Replace Main B/D

Check error

color input

mode

Check color by input

- External Input (COMPONENT/AV/HDMI)

Y

Check external

device and

cable

Replace Main B/D

N

☞A7

N

Y

Replace module

Request repair

for external

device/cable

Check Test pattern

☞A10

☞ A8 / A9

End

Color

error

Color

error

External

device/Cable

Normal

External

Input Component,

HDMI error

Error Symptom

A. Video Error

Established date

5/14

Content

Color error

Revised date

Standard Repair Process

LGE Internal Use Only

N

Y

Check external

device

connection

condition

Y

N

Check and

replace Link

Cable

Y

Replace

Module

Check color condition by input

- External Input (Component/AV/HDMI)

Vertical/Horizontal bar, residual image, light spot

Request repair

for external

device

☞A10

External device screen error-Color error

Connect other external

device and cable

(Check normal operation of

External Input, Component

and HDMI by connecting

Jig, pattern Generator,

Set-top Box etc.

N

Y

Replace

Main B/D

Check screen condition by input

-External Input (Component/AV/ HDMI)

Request repair for

external device

Check S/W Version

Y

N

S/W Upgrade

Y

N

Y

N

Replace Main B/D

Replace

Module

☞A7

☞ A8/ A9

Check Test pattern

N

End

Screen

normal

Screen normal

Screen

normal

End

Check

Version

Normal Screen

External

Input error

Error Symptom

A. Video Error

Established date

6/14

Content

Vertical/Horizontal bar, Residual Image,

Light spot, External device Color error

Revised date

Standard Repair Process

Y

N

End

LGE Internal Use Only

Power

LED On

Y

N

DC Power on

by pressing Power Key

On Remote control

Y

N

Check Adaptor/

Power cord

was inserted properly

Check

Power LED

Replace

Main B/D

N

Y

Check ST-BY 3.5V

N

Replace Adaptor or

Main B/D

Y

☞A11

☞A17

Stand-By : Red

※

Power

LED On

Normal Voltage

Normal

Operati

on

Error Symptom

B. Power Error

Established date

7/14

Content

No power

Revised date

Standard Repair Process

End

LGE Internal Use Only

Normal

Voltage

N

Y

Check Power Off

Mode

Fix A/C cord & Outlet

and check each 3

phase out

Check A/C cord

Check for all 3- phase power out

Check outlet

Replace Main B/D

(If Power Off mode is not displayed) Check Adaptor voltage

Y

N

Replace Main B/D

Replace Adaptor

N

Y

☞A14

☞A13

Status Power off List Explanation

Normal

"POWEROFF_REMOTEKEY" Power off by REMOTE CONTROL "POWEROFF_OFFTIMER" Power off by OFF TIMER "POWEROFF_SLEEPTIMER" Power off by SLEEP TIMER "POWEROFF_INSTOP" Power off by INSTOP KEY "POWEROFF_AUTOOFF" Power off by AUTO OFF "POWEROFF_ONTIMER" Power off by ON TIMER "POWEROFF_RS232C" Power off by RS232C "POWEROFF_RESREC" Power off by Reservated Record "POWEROFF_RECEND" Power off by End of Recording "POWEROFF_SWDOWN" Power off by S/W Download "POWEROFF_UNKNOWN" Power off by unknown status except listed case

Abnormal

"POWEROFF_ABNORMAL1" Power off by abnormal status except CPU trouble "POWEROFF_CPUABNORMAL" Power off by CPU Abnormal

* Please refer to the all cases which

can be displayed on power off mode.

Error

CPU

Abnorm

al

Abnorm

al1

Normal End

Error Symptom

B. Power Error

Established date

8/14

Content

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

Revised date

Standard Repair Process

LGE Internal Use Only

No audio

Screen normal

Check user

Connection

from Main 

Speaker Cable

N

Y

Insert wafer SPK Cable

Replace Speaker

or Main B/D

Connec

tion

Error Symptom

C. Audio Error

Established date

9/14

Content

No audio / Normal video

Revised date

Standard Repair Process

☞A15

Normal

Audio

End

Y

N

LGE Internal Use Only

Check and replace

speaker and

connector

Connect and check

other external

device

Y

Check and fix external device

Replace Adaptor

N

Y

Check input signal

-RF

-External Input

(When RF signal is not received) Request repair to external

cable/ANT provider

Y

Check Voltage 19V

of Adaptor

(In case of External Input signal error) Check and fix external device

Replace Main B/D

N

☞A13

End

Signal

Normal

Voltage

Normal

Audio

Wrecked Audio/

Discontinuation/

Noise for all audio

Wrecked Audio/

Discontinuation/

Noise only for D-TV

Wrecked Audio/

Discontinuation/

Noise only for Analog

Wrecked Audio/

Discontinuation/

Noise only for External Input

N

Replace Main B/D

Error Symptom

C. Audio Error

Established date

10/14

Content

Wrecked audio / Discontinuation / Noise

Revised date

Standard Repair Process

LGE Internal Use Only

Y

N

Check R/C itself

Operation

Y

Replace R/C

If R/C operate, Explain the customer cause is interference

from light in room.

Check R/C Operating

When turn off light

in room

Check & Replace

Baterry of R/C

Check & Repair Cable connection Connector solder

Check 3.5V

On Main B/D

☞A17

N

Check Voltage 19V of Adaptor

☞A13

Check IR

Output signal

N

Y

Replace

IR B/D

N

☞A17

Replace

Main B/D

Y

☞A17

End

Normal

Operating

Normal Voltage

Normal

Signal

Normal

Operating

Normal

Operating

End

Y

Error Symptom

D. Function Error

Established date

11/14

Content

Remote control & Local switch checking

Revised date

Standard Repair Process

LGE Internal Use Only

Check technical information

- Fix information

- S/W Version

N

Y

Check input

signal

Y

N

Check and fix

external device/cable

Replace Main B/D

Fix in

accordance

with technical

information

Signal

Input

Technical

information

External Input

and Component

Recognition error

HDMI

Recognition

error

Error Symptom

D. Function Error

Established date

12/14

Content

External device recognition error

Revised date

Standard Repair Process

LGE Internal Use Only

Check location

of noise

Identify

nose type

Replace Main Board

Check location

of noise

※ When the nose is severe, replace the module (For models with fix information, upgrade the S/W or provide the description)

※ If there is a “Tak Tak” noise from the cabinet, refer to the KMS fix information and then proceed as shown in the solution manual (For models without any fix information, provide the description)

or

※ Mechanical noise is a natural phenomenon and apply the 1st level description. When the customer does not agree, apply the process by stage.

※ Describe the basis of the description in

“Part related to nose” in the Owner’s Manual.

Circuit

noise

Mechanical

noise

Error Symptom

E. Noise

Established date

13/14

Content

Circuit noise, Mechanical noise

Revised date

Standard Repair Process

LGE Internal Use Only

Replace module

Zoom part with exterior damage

Replace cabinet

Replace remote control

Replace stand

Standard Repair Process

Module

damage

Cabinet

damage

Remote

control

damage

Stand

damage

Error Symptom

F. Exterior Defect

Established date

14/14

Content

Exterior defect

Revised date

LGE Internal Use Only

Contents of Standard Repair Process Detail Technical Manual

No. Error symptom Content Page Remarks

1

A. Video error_ No video/Normal audio

Check LCD back light with naked eye A1 2 LED driver B+ 24V measuring method A2 3 Check White Balance value A3 4 Power Board voltage measuring method A4 5

A. Video error_ No video/Video lag/stop

TUNER input signal strength checking method A5 6 TV Version checking method A6

7

A. Video error_Color error

Connection diagram A7

8

Check Link Cable (LVDS) reconnection condition

A8 A9

9

Adjustment Test pattern - ADJ Key A10

10 11

A. Video error_Vertical/Horizontal bar, residual image, light spot

Connection diagram A8

12 Check Link Cable (LVDS) reconnection condition

A8

A9 13 Adjustment Test pattern - ADJ Key A10 14

Defected Type caused by T-Con/ Inverter/ Module

Exchange T-Con Board (1) A-1/5

15 Exchange T-Con Board (2) A-2/5

16

Exchange LED driver Board (PSU) A-3/5

Exchange Module itself (1) A-4/5

17 18 Exchange Module itself (2) A-5/5

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

LGE Internal Use Only

No. Error symptom Content Page Remarks

19

B. Power error_No power

Check front display LED A11 20 Check power input Voltage & ST-BY 3.5V A12 21 Checking method when power is ON A13 22 POWER BOARD voltage measuring method A4

23

B. Power error_Off when on, off while viewing

POWER OFF MODE checking method A14

24 C. Audio error_No audio/Normal video Checking method in menu when there is no audio A15

25

D. Function error_ No response in remote control, key error

Remote control operation checking method A17

Contents of Standard Repair Process Detail Technical Manual

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

LGE Internal Use Only

Standard Repair Process Detail Technical Manual

Power On -> disjoint back case -> check lighting

Error Symptom

A. Video Error, No Video/Normal Audio

Established date

A1

Content

Check Back Light On with Naked eye

Revised date

LGE Internal Use Only

Standard Repair Process Detail Technical Manual

Measure DC Voltage applying to LED backlight from Main B/D

Error Symptom

A. Video Error, No Video/Normal Audio

Established date

A2

Content

Power Board to LED back light Voltage

Revised date

LGE Internal Use Only

Standard Repair Process Detail Technical Manual

Check LVDS 12V

Error Symptom

A. Video Error, No Video/Normal Audio

Established date

A4

Content

Power Board Voltage Measuring Method

Revised date

HD Model : 27 ~ 30 pin FHD Model : 48 ~ 51 pin

LGE Internal Use Only

Standard Repair Process Detail Technical Manual

As the part connecting to the external input, check the screen condition by signal

* Jack spec. : depending on Model

Error Symptom

A. Video Error, Vertical/Horizontal bar, Residual Image,

Light spot

Established date

A7

Content

connection diagram

Revised date

LGE Internal Use Only

1. Check and replace LVDS Cable

2. Check LVDS connection condition

Standard Repair Process Detail Technical Manual

Error Symptom

A. Video Error, Color Error

Established date

A8/

A9

Content

Check and replace Link Cable(LVDS) and contact condition

Revised date

LGE Internal Use Only

Solder defect, CNT Broken

T-Con Defect, CNT Broken

Solder defect, CNT Broken

Abnormal Power Section

Solder defect, Short/Crack

Abnormal Power Section Solder defect, Short/Crack

Appendix : Exchange T-Con Board (1)

LGE Internal Use Only

Abnormal Power Section

Solder defect, Short/Crack

Abnormal Power Section

Solder defect, Short/Crack

Fuse Open, Abnormal power section

Noise

GRADATION

Abnormal Display

Appendix : Exchange T-Con Board (2)

LGE Internal Use Only

Appendix : Exchange the Module (1)

Panel Mura, Light leakage

Press damage

Crosstalk

Press damage

Panel Mura, Light leakage

Press damage

Un-repairable Cases In this case please exchange the module.

LGE Internal Use Only

Vertical Block

Source TAB IC Defect

Horizontal Block Gate TAB IC Defect

Gate TAB IC Defect

Vertical Line Source TAB IC Defect

Vertical Block

Source TAB IC Defect

Horizontal Block Gate TAB IC Defect

Horizontal line Gate TAB IC Defect

Gate TAB IC Defect

Horizontal Block Gate TAB IC Defect

Appendix : Exchange the Module (2)

Un-repairable Cases In this case please exchange the module.

LGE Internal Use Only

Standard Repair Process Detail Technical Manual

ST-BY condition: Red

Front LED control :

Menu  Option  Standby Light  On/Off

Error Symptom

B. Power Error, No Power

Established date

A11

Content

Check front Display LED

Revised date

LGE Internal Use Only

Standard Repair Process Detail Technical Manual

Check Voltage 19V of Adaptor Power

Error Symptom

B. Power Error, No Power

Established date

A12/

A13

Content

Checking Method When Power is ON

Revised date

LGE Internal Use Only

1. Press the IN-START button of the remote control for adjustment

2. Check the entry into adjustment item 3

Standard Repair Process Detail Technical Manual

Error Symptom

B. Power Error, Off when on, off whiling viewing

Established date

A14

Content

Power off Mode checking method

Revised date

LGE Internal Use Only

Check Connection from Main B/D to Speaker

Standard Repair Process Detail Technical Manual

Error Symptom

C. Audio Error, No Audio/Normal Video

Established date

A15

Content

Checking method in menu when there is no audio

Revised date

LGE Internal Use Only

1

KEY2

2

3.5V_ST 3

GND

4

LED_R/BUZZ

5

IR

6

GND

1, 2. Check IR cable condition between IR & Main board

3. Check the ST-BY 3.5V on the terminal 4

4. When checking the Pre-Amp when the power is in ON condition, it is normal when the Analog Tester needle moves slowly, and defective when it does not move at all.

Standard Repair Process Detail Technical Manual

①

②

③

④

P4600

< Sub Ass’y>

< Main Ass’y>

Error Symptom

D. Function Error, No Response in remote control, Key error

Established date

A17

Content

Remote control operation checking method

Revised date

LGE Internal Use Only

LG 32LF510A-TA, 32LF513A-TA, 43LF510A-TA, 43LF513A-TA, 49LF510A-TA Service manual & schematics

Specifications and Main Features

Frequently Asked Questions

User Manual