2014 Led Lg 32lb55-A-t- Chassis Lb45b

Printed in KoreaP/NO : MFL68180003 (1402-REV00)

LED TVSERVICE MANUAL

North/Latin America http://aic.lgservice.comEurope/Africa http://eic.lgservice.comAsia/Oceania http://biz.lgservice.com

Internal Use Only

CHASSIS : LB45B

MODEL : 32LB55*A 32LB55*A-T*

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

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

CONTENTS

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

SAFETY PRECAUTIONS ........................................................................ 3

SERVICING PRECAUTIONS .................................................................... 4

SPECIFICATION ....................................................................................... 6

ADJUSTMENT INSTRUCTION ................................................................ 9

BLOCK DIAGRAM .................................................................................. 13

EXPLODED VIEW .................................................................................. 14

SCHEMATIC CIRCUIT DIAGRAM ..............................................................


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

IMPORTANT SAFETY NOTICE

SAFETY PRECAUTIONS


SERVICING PRECAUTIONSCAUTION: Before servicing receivers covered by this service manual and its supplements and addenda, read and follow the SAFETY PRECAUTIONS on page 3 of this publication.NOTE: If unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions on page 3 of this publication, always follow the safety precau-tions. Remember: Safety First.

General Servicing Precautions1. 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 explo-sion hazard.

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

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

4. Unless specified otherwise in this service manual, clean electrical contacts only by applying the following mixture to the contacts with a pipe cleaner, cotton-tipped stick or comparable non-abrasive applicator; 10 % (by volume) Acetone and 90 % (by volume) isopropyl alcohol (90 % - 99 % strength)CAUTION: This is a flammable mixture.Unless specified otherwise in this service manual, lubrication of contacts in not required.

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

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

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

8. Use with this receiver only the test fixtures specified in this service manual.CAUTION: Do not connect the test fixture ground strap to any heat sink in this receiver.

Electrostatically Sensitive (ES) DevicesSome semiconductor (solid-state) devices can be damaged eas-ily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor “chip” components. The following techniques should be used to help reduce the incidence of component dam-age 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. Alter-natively, obtain and wear a commercially available discharg-ing 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 expo-sure 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 classified as “anti-static” can generate electrical charges sufficient to damage ES devices.

5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.

6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads elec-trically 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 mate-rial to the chassis or circuit assembly into which the device will be installed.CAUTION: Be sure no power is applied to the chassis or cir-cuit, and observe all other safety precautions.

8. Minimize bodily motions when handling unpackaged replace-ment ES devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity suf-ficient to damage an ES device.)

General Soldering Guidelines1. Use a grounded-tip, low-wattage soldering iron and appropri-

ate 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 wire-

bristle (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 techniquea. 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 flows onto and around both the compo-nent 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.


IC Remove/ReplacementSome chassis circuit boards have slotted holes (oblong) through which the IC leads are inserted and then bent flat against the cir-cuit 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.

Removal1. 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.

Replacement1. 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 TransistorRemoval/Replacement1. 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 remain-

ing 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 DeviceRemoval/Replacement1. 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/Replacement1. Remove defective diode by clipping its leads as close as pos-

sible to diode body.2. Bend the two remaining leads perpendicular y to the circuit

board.3. Observing diode polarity, wrap each lead of the new diode

around the corresponding lead on the circuit board.4. Securely crimp each connection and solder it.5. Inspect (on the circuit board copper side) the solder joints of

the two "original" leads. If they are not shiny, reheat them and if necessary, apply additional solder.

Fuse and Conventional ResistorRemoval/Replacement1. Clip each fuse or resistor lead at top of the circuit board hollow

stake.2. Securely crimp the leads of replacement component around

notch at stake top.

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

Circuit Board Foil RepairExcessive 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 when-ever this condition is encountered.

At IC ConnectionsTo 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 connec-tions).

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 ConnectionsUse 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 con-nected 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.


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

1. Application rangeThis specification is applied to the LB45B chassis.

2. Requirement for TestEach 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 method1) 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 Specification Remarks1. Market NON EU

2. Broadcasting system PAL/SECAM B/G/D/K, PAL I, NTSC-M PALB/B

3. Channel StorageBAND PAL(BG,I) NTSC(M) China(DK)VHF/UHF 01-C69 2~78 C1~C69Cable S1~S47 1~71 S1~S47

4. Receiving system Upper Heterodyne5. Video Input PAL, SECAM, NTSC Rear (2EA)6. Component Input Y/Cb/Cr, Y/ Pb/Pr Rear (1EA), Except RGB PC Models7. USB Input MP3, JPEG,Movie Side (1EA)8. AV Audio Output RCA-RF/AV/HDMI Audio Output Rear (1EA)9. D-SUB RGB-PC or Service Only Rear (1EA)

10. HDMI Input HDMI-DTV, Only PCM MODE AV input 2EA11. Audio Input (1EA) AV&Component &PC 2EA


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


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


ADJUSTMENT INSTRUCTION1. Application Range

This specification sheet is applied to all of the LED TV with LB45B 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.

* CautionWhen 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)

Adjust Sequenceaa 00 00 [Enter Adjust Mode]xb 00 40 [Component1 Input (480i)]ad 00 10 [Adjust 480i Comp1]xb 00 60 [RGB Input (1024*768)]ad 00 10 [Adjust 1024*768 RGB]aa 00 90 End Adjust mode

4. EDID Download4.1. 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.

8BIT FHD Large Inch 32LB5**A Models(LB45B)

Checksum: Changeable b y total EDID data.<Large FHD Model> LB45B- 32LB5xx

NO Item CMD 1 CMD 2 Data 0Enter AdjustMODE

Adjust ‘Mode In’ A A 0 0 When transfer the ‘Mode In’,

Carry the command.

ADC adjust ADC Adjust A D 1 0 Automatically adjustment

(The use of a internal pattern)

EZ ADJUST0. Tool Option1

1. Tool Option2

2. Area Option

3. ADC Calibration

9. W/V ADJUST

5. EDID D/L(AC3)

EDID D/L HDMI1 NG

HDMI2 NG

Start Reset

EDID D/L HDMI1 OK

HDMI2 OK

Start Reset

** HDMI 1 : 256Bytes0 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 0110 01 18 01 03 80 A0 5A 78 0A F3 30 A4 54 46 96 2620 0F 49 4B 21 08 00 45 40 01 01 61 40 01 01 01 0130 01 01 01 01 01 01 01 1D 00 72 51 D0 1E 20 6E 2840 55 00 C4 8E 21 00 00 1E 1B 21 50 A0 51 00 1E 3050 48 88 35 00 BC 77 21 00 00 1C 00 00 00 FC 00 4C60 47 20 54 56 0A 20 20 20 20 20 20 20 00 00 00 FD70 00 3A 3F 1C 44 0F 00 0A 20 20 20 20 20 20 01

80 02 03 28 F1 4F 84 07 01 16 02 03 11 12 13 14 0590 20 22 1F 10 26 11 07 50 09 7F 07 83 01 00 00 68A0 03 0C 00 10 00 80 1E 00 01 1D 00 80 51 D0 1C 20B0 40 80 35 00 BC 88 21 00 00 1E 8C 0A D0 8A 20 E0C0 2D 10 10 3E 96 00 13 8E 21 00 00 18 8C 0A A0 14D0 51 F0 16 00 26 7C 43 00 C4 8E 21 00 00 98 01 1DE0 80 18 71 1C 16 20 58 2C 25 00 C4 8E 21 00 00 9EF0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

EDID C/S dataFHD (8Bit)

HDMI

check sum (Hex)Block 0 A4

Block 144(HDMI1)34(HDMI2)


5. White Balance Adjustment5.1. Overview5.1.1. 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 temperature1) Surrounding Temperature: 25 °C ± 5 °C2) Warm-up time: About 5 Min3) 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

** RS-232C Connection Method.LB45S/LB45R → RGB cable → UART Jig → RS232C cable and USB AM-BM cable → PC(RS232C Port)

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

(2) Adjustment Map

5.5. Adjustment method5.5.1. 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

Color Analyzer

Computer

Pat tern Generator

RS-232C

RS-232C

RS-232C

Probe

Signal Source

* If TV internal pattern is used, not needed

RS-232C COMMANDExplanation

CMD DATA IDwb 00 00 Begin White Balance adjustment

wb 00 ff End White Balance adjustment(internal pattern disappears)

Adj. item Command(lower caseASCII)

Data Range(Hex.)

Default(Decimal)

CMD1 CMD2 MIN MAX

Cool

R Gain j g 00 C0 172G Gain j h 00 C0 192B Gain j i 00 C0 192R Cut 64G Cut 64B Cut 64

Medium

R Gain j a 00 C0 192G Gain j b 00 C0 192B Gain j c 00 C0 192R Cut 64G Cut 64B Cut 64

Warm

R Gain j d 00 C0 192G Gain j e 00 C0 192B Gain j f 00 C0 192R Cut 64G Cut 64B Cut 64


(2) Medium / Warm Mode1) 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.

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

W/B Table in process of aging time- LGD Module

- AUO/ INX/ COST/ SHARP/ BOE Module which cool spec is 13000K

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 check8.1. 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

9. GND and HI-POT Test9.1. 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.

Mode Color Temp Color coordinate RemarkCool(C50) 13,000 K x = 0.271 (±0.015)

y = 0.270 (±0.015)* Test signal- Inner pattern for

W/B adjust- External white

pattern (80IRE, 204gray)

Medium(0) 9,300 K x = 0.286 (±0.015)

y = 0.289 (±0.015)Warm(W50) 6,500 K x = 0.313 (±0.015)

y = 0.329 (±0.015)

Item Min Typ Max Unit RemarkAudio practical max Output, L/R (Distortion =10% max Output)

4.5 5.0 6.0 WVrms

(1) Measurement condition - EQ/AVL/Clear Voice: Off(2) Speaker (8 Ω Impedance)

(normal line) March ~ DecemberAging time Cool Medium Warm

color coordinate x y x y x yTarget 271 270 286 289 313 329

1 0-2 282 289 297 308 324 3482 3-5 281 287 296 306 323 3463 6-9 279 284 294 303 321 3434 10-19 277 280 292 299 319 3395 20-35 275 277 290 296 317 3366 36-49 274 274 289 293 316 3337 50-79 273 272 288 291 315 3318 80-119 272 271 287 290 314 3309 Over 120 271 270 286 289 313 329

(normal line) January ~ FeburaryAging time Cool Medium Warm

color coordinate x y x y x yTarget 271 270 286 289 313 329

1 0-2 286 295 301 314 328 3542 3-5 284 290 299 309 326 3493 6-9 282 287 297 306 324 3464 10-19 279 283 294 302 321 3425 20-35 276 278 291 297 318 3376 36-49 274 275 289 294 316 3347 50-79 273 272 288 291 315 3318 80-119 272 271 287 290 314 3309 Over 120 271 270 286 289 313 329

cool med Warmx y x y x Y

spec 271 270 286 289 313 329target 278 280 293 299 320 339


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

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 lower 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.

(5) Updating Completed, the TV will restart automatically.(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.

* 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.)

11. Optional adjustments11.1. 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 SVC 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 Adjustment11.2.1. 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.

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.


POW

ER B

OAR

D

Sou

nd A

MP

NTP

7513

IC30

1

( ( ( (

Mod

ule

JK10

1

Y,Pb,Pr In

Audi

oO

ut

MST

6841

XP

5

9 4 3

1011

Tune

r SD

ATu

ner S

CL

TUNER

IF_A

GC

B+

IR/KEY

40

24M

hz

98 99 44 43

IC502

Seria

l Fla

sh8M

byte

s

IC503

EEPR

OM

24C

64

IC50

1

30LP

F33 1821

P301

AV2 In

OP-

AM

PIC

302

x4 G

ain

P701

P601

/602

Audio L-Out

24

1

XX

X

39

3738

Audio R-Out

HD

MI

SCL/

SDA

48 115

50 5111

311

2

Aud

io_S

CL

Aud

io_S

DA

LVD

SO

utpu

t

P Dim

Inv. ON

RL On

P_ST 3.5V

M_3

.3V

TU_3

.3V

P_24V

IC701

MP2

0051

Mai

n_1.

2V

A_O

UT_

12V

10117 8 9 38

I2S_

MC

LKI2

S_W

SI2

S_SC

KI2

S_SD

O

P400

108

111

117IR

KEY1

Led_PWR

102

105

101

53 5245

85 84

EEP

SDA

EEP

SCL

94 95 97 96

SPI_

CLK

SPI_

DI

SPI_

CZ

SPI_

DO

S_A

MP_

24V 32

40

9

LPF

JK202

USB

_5V

110KEY2

ST_3

.5V

5

P_12V

Q710

IC711

1.8V

REG

Mai

n_1.

8V

Mai

n_3.

3V

Q720

AO

3407

A

Pane

l_Vc

c

IC709

MP1

497

Mai

n_5V

To U

SB

USB

_DN

USB

_DP

IF_P

IF_N

31

35

1013

~15

3

JK20

3JK

204

IC401

To U

SB

7

TU_1

.8V

19 20

Comp. R/L In

AV1 In

26,3

3,34

27,3

5,36

22,2

0,24

,33,

34

7762

54

4130

18

911

610

7

100

XX

X

IRB

oard

BLOCK DIAGRAM


400

120

501

502

500

900

A2

A10

Set

+ S

tand

121

200

530

540

521

410

LV1

EXPLODED VIEW

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 X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer.

IMPORTANT SAFETY NOTICE

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

INPUT1

MNTROUT

MNTLOUT

COMMONRIN

COMMONLIN

AV2RIN

AV2LIN

COMP_PR

COMP_PB

COMMON_VIN

AV2_VIN

R105

10K

C1035600pF50V

R10912K

TP101

R107220K

COMMON_RIN

MUTE_AOUT

R10612K

MUTE_AOUT

R10375

R108

10K

R104220K

COMP_PR

MNT_ROUTC1055600pF50V

MNT_LOUTR110

1K

COMMON_LIN

COMP_PB

COMMON_VINP_12V

MNT_VOUT

R10275

R111

1K

R123220

DEBUG

R120

75

DEBUG

AV2_RINR116220K

R114

10K

R117

10KR11812K

R113220K

R11512K

AV2_LIN

AV2_VIN

C106

10uF16V

C104

10uF16VQ101

MMBT3904(NXP)

EBC

Q102MMBT3904(NXP)

READY

EBC

Q103MMBT3904(NXP)

EBC

Q104MMBT3904(NXP)

READY

EBC

Q105MMBT3904(NXP)DEBUG

EBC

AV2_VINR122

0

OPT

R121

33DEBUG

C101470pF50V

C102470pF50V

C107470pF50V

C108470pF50V

JK101

PPJ239-06

6J

7J

4J

8K

5K

8L

5L

5M

4N

6N

7N

7D

5D

8E

5E

8F

6F

4F

5G

4H

6H

7H

ZD11020V

ZD10720V

ZD10920V

ZD10520V

ZD10420V

ZD10620V

ZD108SD05READY

ZD100SD05READY

ZD102SD05READY

ZD101SD05READY

D102

D101

D104

D103

D105

D106

D107

D108

JK101-*1

PPJ239-26

GREEN & YELLOW

5J [YL/GL]O-SPRING

6J [YL/GL]E-LUG

4J [YL/GL]CONTACT

7K [BL]E-LUG-S

5K [BL]O-SPRING

7L [RD1]E-LUG-S

5L [RD1]O-SPRING

5M [WH1]O-SPRING

4N [RD2]CONTACT

5N [RD2]O-SPRING

6N [RD2]E-LUG

6D [WH2]E-LUG

5D [WH2]O-SPRING

7E [RD3]E-LUG-S

5E [RD3]O-SPRING

7F [YL]E-LUG-S

5F [YL]O-SPRING

4F [YL]CONTACT

5G [WH3]O-SPRING

4H [RD4]CONTACT

5H [RD4]O-SPRING

6H [RD4]E-LUG

R10175

R15075READY

R15175READY

R11275

1 7INPUT1

COMPONENT / AV IN / AV AUDIO OUTLB45B/LT5B

EAX65550501

POP NOISE

POP NOISE

V-OUT Buffer(DEBUG)

32/42LB550A 2013/08/15

Size check!!

Size check!!

Copyright © 2014 LG Electronics. Inc. All rights reserved. Only for training and service purposes

LGE Internal Use Only

USB DOWN STREAM


INPUT2

GND

+5V_USB

ZD22130V

READYZD22030V

READYUSB_DP

USB_DN

C22010uF10V

OPTC22122uF10V

R2040

W/O UART IC

C2030.1uF

With UART IC

IC201

MAX3232CDR

EAN41348201

With UART IC

3C1-

2V+

4C2+

1C1+

6V-

5C2-

7DOUT2

8RIN2

9ROUT2

10DIN2

11DIN1

12ROUT1

13RIN1

14DOUT1

15GND

16VCC

R2050

W/O UART IC

JK201KJA-PH-1-0177

3 M3_DETECT

4 M4

5 M5_GND

1 M1

6 M6

C2050.1uF

With UART IC

C2020.1uF

With UART IC

R202100

With UART IC

DSUB

_SCL

C2010.1uF

P201

12505WS-04A00

DEBUG

1

2

3

4

5

P202

12507WS-04L

1VCC

2PM_RXD

3GND

4RM_TXD

5

GND

DSUB

_SDA

R201100

With UART IC

C2040.1uF

With UART IC

HDMI1_D0-

JK203

14 NC

13 CEC

5DATA1_SHIELD

20

SHIELD

12 CLK-

11 CLK_SHIELD

2DATA2_SHIELD

19 HPD

18 +5V_POWER

10CLK+

4DATA1+

1DATA2+

17 DDC/CEC_GND

9DATA0-

8DATA0_SHIELD

3 DATA2-

16 SDA

7DATA0+

6DATA1-

15 SCL HDMI1_SCL

Q230MMBT3904(NXP)

E

B

CR23010K

HDMI1_CK+

R2332.7K

+5V_USB

R2322.7K

HDMI1_D1-

HDMI1_D2+

HDMI1_D0+

HDMI1_CK-

HDMI1_SDA

HDMI1_D2-

HDMI1_HPD

R2311K

HDMI1_D1+

HDMI2_CK+

HDMI2_HPD

HDMI2_SCL

+5V_USB

HDMI2_D1-

HDMI2_CK-

Q240MMBT3904(NXP)

E

B

C

R2421K

R24110K

HDMI2_D0-

HDMI2_D2-HDMI2_D1+

JK204

14 NC

13 CEC

5DATA1_SHIELD

20

SHIELD

12 CLK-

11 CLK_SHIELD

2DATA2_SHIELD

19 HPD

18 +5V_POWER

10CLK+

4DATA1+

1DATA2+

17 DDC/CEC_GND

9DATA0-

8DATA0_SHIELD

3 DATA2-

16 SDA

7DATA0+

6DATA1-

15 SCLHDMI2_SDA

R2432.7K

R2442.7K

HDMI2_D2+

HDMI2_D0+

ZD230READY

ZD231READY

ZD232READY

ZD233READY

R236100

R237100

ZD240READY

ZD241READY

ZD242READY

ZD243READY

R247100

R248100

L220

120OHM

JK2023AU04S-305-ZC-(LG)

12

34

5

+3.5V_ST

+3.5V_ST

R206

100

W/O UART IC

HDMI

2_DE

T

+3.5V_ST

D242

30V

READY

R24610K

R24510K

D241

30V

READY

+3.5V_ST

HDMI1_DET

D234IP4283CZ10-TBA

ESD_HDMI2_IP4283

3GND_1

2TMDS_CH1+

4TMDS_CH2-

1TMDS_CH1-

5TMDS_CH2+

6NC_1

7NC_2

8GND_2

9NC_3

10NC_4

D235IP4283CZ10-TBA

ESD_HDMI2_IP4283

3GND_1

2TMDS_CH1+

4TMDS_CH2-

1TMDS_CH1-

5TMDS_CH2+

6NC_1

7NC_2

8GND_2

9NC_3

10NC_4

D244IP4283CZ10-TBA

ESD_HDMI2_IP4283

3GND_1

2TMDS_CH1+

4TMDS_CH2-

1TMDS_CH1-

5TMDS_CH2+

6NC_1

7NC_2

8GND_2

9NC_3

10NC_4

D245IP4283CZ10-TBA

ESD_HDMI2_IP4283

3GND_1

2TMDS_CH1+

4TMDS_CH2-

1TMDS_CH1-

5TMDS_CH2+

6NC_1

7NC_2

8GND_2

9NC_3

10NC_4

D234-*1IP4294CZ10-TBR

ESD_HDMI_IP4294

1

8

2

7

3

6

4

5

9

10

D235-*1IP4294CZ10-TBR

ESD_HDMI_IP4294

1

8

2

7

3

6

4

5

9

10

D244-*1IP4294CZ10-TBR

ESD_HDMI_IP4294

1

8

2

7

3

6

4

5

9

10

D245-*1IP4294CZ10-TBR

ESD_HDMI_IP4294

1

8

2

7

3

6

4

5

9

10

2 7INPUT2

Close to SIDE_USB

USB(SIDE)

I2C Control HDMI(REAR)

EAX65550501

32/42LB550A 2013/08/15

LB45B/LT5B



THERMAL


AUDIO

R3576.8K

MNT_ROUT

Q351MMBT3904(NXP)

EBC

R3536.8K

R358 1K

C3566800pF50V

P_12V

MNT_R_AMP

MNT_L_AMP

R356 10K

C352 33pF 50V

IC302AS324MTR-E1

3 INPUT1+

2 INPUT1-

4 VCC

1 OUT1

6 INPUT2-

5 INPUT2+

7 OUT2 8OUT3

9INPUT3-

10INPUT3+

11GND

12INPUT4+

13INPUT4-

14OUT4

R354 5.6K

Q350MMBT3904(NXP)

EBC

P_12V

C3516800pF50V

R3594.7K

P_12V

R3504.7K

C3500.1uF16V

C354 33pF 50V

MNT_LOUT

C3550.1uF16V

R352 10K

R355 5.6K

SPK_L+

SPK_R-

JP302

JP301

SPK_L-

JP304

SPK_R+

P301SMAW250-H04R

1.

2

3

4JP303

SPK_R+

SPK_L-

C3290.47uF50V

0.1uFC334

50V

0.1uFC331

50V

C3330.47uF50V

SPK_R-

0.1uFC330

50V

SPK_L+

0.1uFC335

50V

R351 1K

C3530.1uF16V

R31612

C30633pF50V

R307 100

C319

22000pF

50V

I2S_SCK

C31522000pF50V

C326390pF50V

R31712

R31412

R31512

C3121uF10V

C3020.1uF16V

OPT

1uFC303

10V

SW_RESET

AUAMP_SDA

0.1uFC309

50V

0.1uFC318

50V

+24V_AMP

C327390pF50V

I2S_WS

R306 100

C325390pF50V

C30533pF50V

R32012

C3010.1uF16V

R31812

C31122000pF50V

R311

100

READY

C3141uF10V

C308

22000pF

50V

R31912

+24V_AMP

I2S_SDO

C328390pF50V

R31312

I2S_MCLK

AUAMP_SCL

C3201000pF

50V

R3084.7K

R3094.7K

+3.3V_M

0.1uFC322

16V

R301 100

R302 100

R303 100

L301

BLM18PG121SN1D

+3.3V_M

R304 100

C32110uF6.3V

L30410uHABCO

L30510uH

ABCO

L30310uH

ABCO

L30610uHABCO

POWER_DET

C31710uF35V

C31010uF35V

L303-*110.0uH

TAIYO YUDEN

L304-*110.0uH

TAIYO YUDEN

L305-*110.0uH

TAIYO YUDEN

L306-*110.0uH

TAIYO YUDEN

R3244.7K

R323

4.7K

R322

4.7K

R3254.7K

IC301

NTP7514

3NC_22VDD_PLL

4GND

1NC_1

6DVDD5NC_3

7SDATA

8WCK

9BCK

10SDA

11

SCL

12

FAULT

13

MONITOR_0

14

MONITOR_1

15

MONITOR_2

16

BST2B

17

PGND2B

18

OUT2B

19

PVDD2B

20

PVDD2A

21 OUT2A22 PGND2A23 BST2A24 VDR225 AGND26 NC_427 VDR128 BST1B29 PGND1B30 OUT1B

31

PVDD1B

32

PVDD1A

33

OUT1A

34

PGND1A

35

BST1A

36

RESET

37

AD

38

CLK_I

39

GND_IO

40

VDD_IO

41

[EP]GND

AUDIO 3 7

AUDIO_OUT AMP : GAIN X 4

SPK_R+

SPK_L-

SPK_L+

SPK_R-

SPEAKER_R

SPEAKER_L

0x54

EAX65550501

32/42LB550A 2013/08/15

LB45B/LT5B




TUNER & IR

IF_N

C40247pF50V

C40347pF50V

IF_P

C4100.1uF16V

IF_AGCR412100

+3.3V_M

C4050.1uF16V

C4110.1uF16V

+3.3V_TU

+3.3V_TU

L421

BLM18PG121SN1D

IR

+3.5V_ST

C4230.1uF

16V

KEY1

KEY2

C4250.1uF16V

OPT

C4220.1uF

OPT

C4210.1uF

OPT

C426100pF50V

+3.5V_ST

C4241000pF50V

LED

C40422uF6.3V

100pFC406

50V

TUNER_SCL

TUNER_SDA

L401BLM18PG121SN1D

R42110K

R42210K

R4072.2K

R4082.2K

R405

33

R406

33

C41210uF6.3V

R41310PAL

R41410PAL

R413-*10

NTSC

R414-*10

NTSC

ZD401SD05

ZD402SD05

R4233.3KOPT

TU401TDJH-G101D

PAL

47

SHIELD

6IF[P]

7IF[N]

8NC_2

9NC_3

1B1[+3.3V]

2NC_1

3IF_AGC

4SCL

5SDA

A1A1

B1B1

P421

12507WR-10L

1

2

3

4

5

6

7

8

9

10

11

ZD404IR_Zener

ZD403

LED_R_Zener

TDJH-H101F

TU403NTSC

47

SHIELD

6IF[P]

7IF[N]

8NC_2

9NC_3

1B1[+3.3V]

2NC_1

3IF_AGC

4SCL

5SDA

A1A1

B1B1

TUNER & IR 4 8

close to the tuner pin.

IR/LED+Control

IF

should be guarded by ground

Close to the tuner

EAX65550501

32/42LB550A 2013/08/15

LB45B/LT5B



THERMAL


MAIN SOC

RXA3+

RXA3-

RXACK+

RXACK-

RXA2+

RXA2-

RXA1+

RXA1-

RXA0+

RXA0-

RXB3+

RXB3-

RXBCK+

RXBCK-

RXB2+

RXB2-

RXB1+

RXB1-

RXB0+

RXB0-

R572

100

R507

68

C5120.047uF

IF_AGC

R50533

SPI_DO

+3.5V_ST

LED

C518 2.2uF

R5774.7K

R57822

IR

SPI_DI

HDMI1_D2+

HDMI1_SCL

EEP_SDA

+3.5V_ST

HDMI1_D0+

KEY2

VDDC

R50433

R53622

R542100

KEY1

HDMI1_SDA

C519 2.2uF

R546100

IF_N

MNT_R_AMP

R571

100

COMMON_LIN

SPI_DI

HDMI1_D0-

+1.2V_VDDC

DSUB

_SCL

IF_P

R5694.7K

R575

100

+3.3V_M

USB_DN

I2S_

MCLK

+1.8V_M

EEP_SCL

HW_R

ESET

SPI_CZ

HDMI1_D2-

USB_DP

SPI_CLK

COMMON_VIN

HDMI1_HPD

SPI_DO

SPI_CZ

C514

0.047uF

HDMI1_CK-

R5121M

HDMI1_CK+

R541100

R57922

AVDD_DDR

COMP_PR

R53722

DSUB

_SDA

COMMON_RIN

HDMI1_D1+

VDDC_3.3

MNT_L_AMP

C5500.047uF

HDMI1_D1-

MNT_VOUT

SPI_CLK

AUAM

P_SD

A

100R543

100R544

AUAM

P_SC

L

SW_R

ESET

EEP_SDA

EEP_SCL

RL_ON

PWM_

DIM

RXA0+

RXA0-

RXA1+

RXA1-

RXA2

+

RXA2

-

RXAC

K+

RXAC

K-

RXA3

+

RXA3

-

+3.5V_ST

R538

4.7K

R539

4.7K

R51710K

R510220K

R511220K

C522220pF

C523220pF

R508100

R509100

C5080.047uFR501

33COMP_PB

C511

0.047uF

R503

68

C5100.047uF

C5091000pF

R50233

R530

100FLASH_WP

PANEL_ON

POWER_SWR528

100

INV_ON

R535

1K

R534

1K

AVDD33_DEMOD

HDMI2_D1+

HDMI2_D0-

HDMI2_SDA

HDMI2_CK-

HDMI2_D2-

HDMI2_D2+

HDMI2_SCL

HDMI2_D1-

HDMI2_HPD

HDMI2_D0+

HDMI2_CK+

R533

0

AV2_VIN

C5130.047uF

R50633

C5170.1uF

C51610uF

AV2_RIN

C520 2.2uFAV2_LIN

C521 2.2uF

HW_OPT1

C50110uF6.3V

VDDCC5470.1uF

VDDC

C5440.1uF

VDDCC5060.1uF

C50210uF6.3V

C5490.1uF

AVDD

_DDR

C50410uF6.3V

VDDC_3.3C5480.1uF

AU_3.3V

3.3V_DMPLL

AU_3.3V C5150.1uF

C5050.1uF

VDDC_3.3

C5070.1uF

VDDC_3.3

C5460.1uF

VDDC_3.3

VDDC_3.3

C5450.1uF

C5430.1uF

VDDC_3.3

AVDD33_DEMOD3.3V_DMPLL

C5320.1uF C533

0.1uF

FLASH_WPRXB3-

RXB3+

RXBCK-

RXBCK+

RXB2+

RXB2-

RXB0-

RXB0+

RXB1-

RXB1+

C57322pF

READY

C57422pFREADY

C5034.7uF

0.1uFC535

0.1uFC534

R5504.7K

FHD

R5514.7K

HD

+3.3V_M

HW_OPT1

R545100

L500

120-ohm

L503120-ohm

L505120-ohm

L504120-ohm

L501

120-ohm

L502120-ohm

L506

120-ohm

R5194.7K

+3.5

V_ST

R518100

MUTE

_AOU

T

TUNE

R_SD

A

100R520

TUNE

R_SC

L

100R521

I2S_

SCK

I2S_

SDO

I2S_

WS

C5420.1uF

AVDD_DDR

HDMI1_DET

HDMI2_DET

R547

10KR548

10K

C5720.1uF16V

R574

100

R52333

0R524

+3.5V_ST

C551220pF

OPT

50V

L521100NH

OPT

R513100

R514100

C54122000pF50V

R53110K

POWER_DETR549

100

R52710K

R5401K

IC501

LGE6841 (ATV_13)

1DDCDD_CK

2RX2N_D

3RX2P_D

4HOTPLUG_A

5RXCKN_A

6RXCKP_A

7RX0N_A

8RX0P_A

9AVDD_MOD_1

10RX1N_A

11RX1P_A

12DDCDA_DA

13RX2N_A

14RX2P_A

15DDCDA_CK

16ARC

17VDD

18AVDD3P3_ADC

19HSYNC1

20BIN1P

21SOGIN1

22GIN1P

23GIN1M

24RIN1P

25VSYNC1

26CVBS1

27CVBS0

28VCOM

29CVBSOUT1

30AVDD_AU33

31AUREF

32VAG

33LINEIN_L1

34LINEIN_R1

35LINEIN_L3

36LINEIN_R3

37LINEOUTL3

38LINEOUTR3

39

XTALO

40

XTALI

41

AVDD

3P3_

DMPL

L

42

AVDD

3P3_

DADC

43

VIFP

44

VIFM

45

IFAGC

46

VSS

47

AVDD

_DDR

48

GPIO

55/I

2S_O

UT_W

S

49

GPIO

56

50

GPIO

57/I

2S_O

UT_B

CK

51

GPIO58/I2S_OUT_SD

52

GPIO60

53

GPIO61

54

VDDP

55

VDDC_1

56

LVA4P

57

LVA4M

58

LVA3P

59

LVA3M

60

LVACLKP

61

LVACLKM

62

AVDD

_MOD

_2

63

LVA2P

64

LVA2M

65 LVA1P66 LVA1M67 LVA0P68 LVA0M69 LVB4P70 LVB4M71 LVB3P72 LVB3M73 LVBCKP74 LVBCKM75 LVB2P76 LVB2M77 AVDD_MOD_378 LVB1P79 LVB1M80 LVB0P81 LVB0M82 VDDC_283 INT/GPIO6584 GPIO785 GPIO686 GPIO587 GPIO488 GPIO389 GPIO290 GPIO191 GPIO092 PWM2/GPIO2493 PWM3/GPIO2594 SPI_CK95 SPI_DI96 SPI_DO97 SPI_CZ98 USB0_DM99 USB0_DP

100 AVDD_MOD_4101 GPIO63102 GPIO641

03

TESTPIN

104

PWM0

/GPI

O26

105

PWM1

/GPI

O25

106

DDCA_CK

107

DDCA_DA

108

GPIO67

109

AVDD

_DDR

_2110

SAR0

/GPI

O75

111

SAR1

/GPI

O74

112

SAR2

/GPI

O73

113

SAR3

/GPI

O72

114

GPIO68

115

GPIO

69/I

2S_O

UT_M

CK

116

GPIO70

117

IRIN

118

CEC

119

HWRESET

120

GND

121

HOTPLUG_D

122

RXCKN_D

123

RXCKP_D

124

RX0N_D

125

RX0P_D

126

DDCDD_DA

127

RX1N_D

128

RX1P_D

129

[EP]

C53633pF 50V

C53733pF

IC502W25Q64FVSSIG

WINBOND

3WP[IO2]

2DO[IO1]

4GND

1CS

5DI[IO0]

6CLK

7%HOLD[IO3]

8VCC

R573

100

R570

10K

C5700.1uF16V

C5710.1uF16VREADY

X501

24MHz

C53015pF

C53115pF

HW_RESET

+3.5V_ST

C5630.1uF

16V

C5624.7uF10V

R5821.2K

PD_+12V

0.1uFC560

POWER_DET

R56110K

R562470

R5812.7K

PD_+12V

R5800

PD_+3.5V

C5614.7uF10V

P_12V

R56362K

R56410

IC502-*1MX25L6406EM2I-12G

MACRONIX

3WP

2SO/SIO1

4GND

1CS

5SI/SIO0

6SCLK

7HOLD

8VCC

IC503BR24G256FJ-3

ROHM_EEPROM

3A2

2A1

4GND

1A0

5SDA

6SCL

7WP

8VCC

IC503-*1AT24C256C-SSHL-T

ATML_EEPROM

3A2

2A1

4GND

1A0

5SDA

6SCL

7WP

8VCC

IC504-*1

APX803D29

DIODE

1

GND

3VCC 2 RESET

IC504

BD48K28G

ROHM

1

GND

2 VOUT3VDD

+3.3V_M

R5904.7K

BIG INCH

R5914.7K

SMALL INCHHW_OPT2

HW_OPT2

MAIN SOC 5 7

SERIAL FLASH(2MB)

EEPROM(64K)

*H/W OPTION

Close to MSTAR

MSTAR Vcc

ST 1.26V

DDR 1.8V

Close to MSTAR

ST 3.3V

HD FHDLOW HIGHHW_OPT

H/W RESET

EAX65550501

32/42LB550A 2013/08/15

LB45B/LT5B




LVDS

P601FF10001-30

HD

1[30]

2[29]

3[28]

4[27]

5[26]

6[25]

7[24]

8[23]

9[22]

10[21]

11[20]

12[19]

13[18]

14[17]

15[16]

16[15]

17[14]

18[13]

19[12]

20[11]

21[10]

22[09]

23[08]

24[07]

25[06]

26[05]

27[04]

28[03]

29[02]

30[01]

31

.

RXA2-

RXA3-

RXACK-

P602FI-RE51S-HF-J-R1500

FHD

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

RXBCK-

RXB0-

RXBCK+

RXA0+

RXB3+

RXB1+

RXA1-

RXB0+

RXACK+

RXB2-

PANEL_VCC

RXB3-

RXA2+

RXB1-

RXA1+

RXA0-

RXA3+

RXB2+

C6021000pF50V

OPTC6030.1uF16V

HDC60110uF16V

OPT

RXA3+

RXA3-

RXACK+

RXACK-

RXA2+

RXA2-

RXA1+

RXA1-

RXA0+

RXA0-

PANEL_VCC

C60410uF16V

OPTC6051000pF50V

OPTC6060.1uF16V

FHD

L602120OHM

FHD

L601120OHM

HD

LVDS 6 7

EAX65550501

32/42LB550A 2013/08/15

LB45B/LT5B



THERMAL


POWER

PWM_DIM

+3.5V_ST

R7141K

R729

1K

PWM_DIM_60HZ

+1.2V_VDDC

C7440.1uF16V

+3.5V_ST

C7610.1uF16V

C74210uF6.3V

C74510uF6.3V

+1.8V_M

R710100

R7421

C7520.1uF16V

0.1uFC702

16V

PANEL_VCC

C7070.1uF

50V

PANEL_ON

R74710K

INV_ON

R7492.2K

POWER_SW

+24V_AMP

+3.3V_M

P_12V

C7410.1uF16V+3.3V_M

L750BLM18PG121SN1D

Q721MMBT3904(NXP)E

B

C

RL_ON

R74410K

P_12V

+3.5V_ST

C7500.1uF16V

+3.3V_M

IC701MP20051

3FB

2OUT_2

4GND

1OUT_1

5EN

6NC

7IN_1

8IN_2

9

[EP]GND

C74310uF6.3V

C74010uF6.3V

C75410uF6.3V

Q722MMBT3906(NXP)

E

B

C

Q710AO3435

G

DS

R7625.6K

R76133K

Q711MMBT3904(NXP)

E

B

C

C77710uF10V

OPTP_12V

+3.3V_MC7730.1uF16V

R77133

IC709MP1497DJ

3SW

2IN

4GND

1SS

5BST

6EN

7VCC

8FB

C7750.1uF16V

C7740.1uF

R77847K

C7711uF25V

R777100K

C77010uF16V

0.1uFC705

16V

C7720.1uF16V

L771

6.8uH

NR8040T4R7N

R77043K1%

R7728.2K1%

+5V_USB

C77622uF10V

R74833K

R7402.7K

1%

R7414.7K

1%

IC711AP1117E18G-13

2 OUT

3IN

1ADJ/GND

+3.5V_ST

R71610K

R71510K

Q703

MMBT3904(NXP)E

B

C

R75010K

READY

JP708

JP709

JP710

JP711

C7534.7uF10V

ZD70120VREADY

ZD702SD05

R729-*1

100

PWM_DIM_120HZ

R728100

PWM_DIM_120HZL702

120OHM

L703

120OHM

L761120OHM

L770120OHM

L701

500-ohm

L704

500-ohm

+3.5V_ST

C70110uF10V2012

Q720DMP2130L

DIODESG

DS

R7665.6K

R7655.6K

C76010uF16V

C7620.1uF25V

OPT

Q720-*1AO3407A

AOS

G

DS

P701SMAW200-H18S5

14 12V

924V

4 PDIM#1

18 GND

1312V

8 PDIM#2

33.5V

17GND

12 GND

7GND

2 DRV_ON

16 NC

11GND

6 3.5V

1PWR_ON

1512V

10 24V

53.5V

19.

ZD703

2.5V

ZD704

5V

ZD700

5.6B

7 7POWER

32/42LB550A 2013/08/15

** Switch Panel-Vcc

R1

** +3.5V_ST -> 3.3V_M

R2

** 3.5V_ST -> 1.26V VDDC

OUT:1.26V

FROM LIPS & POWER B/DV0 = 0.8*(1+(R2/R1))

** 3.3V_M -> 1.8V_M

3A

OUT:5V

**12V->USB 5V

Closed IC709R2

Closed IC709 R1

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

** Jig Point_GND

EAX65550501

Add for improving main IC Burtn issue

Add for improving main IC Burtn issue

LB45B/LT5B



Normal audio

Y

N

Move to No video/No audio

No video Normal audio

Check Back Light On with naked eye On

Y

N

Check Power Board 24v, 12v,3.5v etc.

Normal voltage

Y

N

Replace T-con Board or module

Repair Power Board or parts

Check Power Board 93.2~118.5V v output

Normal voltage

Y Replace Inverter or module

N Repair Power Board or parts

End

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

※Precaution

Established

date

Standard Repair Process

Revised date 1/14 LCD TV

Error

symptom

A. Video error

No video/ Normal audio

A4 A1

A2

A6 & A3

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,,,)

2013. 01 .24



Normal

voltage?

Check various voltages of Power Board ( 3.5V,12V,20V or 24V…)

No Video/ No audio

Check and replace MAIN B/D

Y

Replace Power Board and repair parts

N End


A. Video error

No video/ No audio

A4

Established

date


Error

symptom

2013. 01 .24



A. Video error

Picture broken/ Freezing

Y

N

A5

N

Check RF Signal level

Normal

Signal?

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`

SVC

Bulletin?

Replace

Main B/D

Check

Tuner soldering

Normal

Picture?

Y

N

Y

Close

Normal

Picture?

Y Close

Normal

Picture?

Y

Contact with signal distributor

or broadcaster (Cable or Air)

N N

Normal

Picture?

Y

Close

N

A6


Established

date


Error

symptom

2013. 01 .24



A. Video error

Tuning fail, Picture broken/ Freezing

Y N

A5

Check RF Signal level

Normal

Signal?

Check

S/W Version

S/W Upgrade

SVC

Bulletin?

Normal

Picture?

Y

N

Y

Close

Check RF signal cable Check whether other equipments have problem or not. (By connecting RF Cable at other equipment) → Set-Top-Box, Different maker TV etc

A6


Established

date


Error

symptom

Contact with

signal distributor

or broadcaster

Close

N

Check

Tuner soldering

Replace

Main B/D

2013. 01 .24



Color

error?

Y

N

※ Check and

replace Link

Cable

(LVDS) and

contact

condition

Y

N

Replace Main B/D Color

error?

Check error color input mode

Check color by input -AV -COMPONENT -HDMI

Y External device

/Cable

normal

AV/

Component error

Check external device and cable

Y External device

/Cable

normal

HDMI

error

Check external device and cable

Replace Main B/D

Replace Main B/D

N

N

A. Video error

Color error

A7

N

Y

End

Replace module

Request repair

for external

device/cable

Color

error?

Check Test pattern

A10

A8/ A9


Established

date


Error

symptom

2013. 01. 24



Screen

normal?

N

Y Check external device connection condition

Y

N

Check and replace Link Cable

Normal?

Y

Screen

normal?

Replace module

Check color condition by input -AV -Component -HDMI

End

Vertical/Horizontal bar, residual image, light spot

Request repair for external device

A. Video error

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

A10

External device screen error-Color error

AV

Input

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

Screen

normal?

Check screen condition by input -AV -Component -HDMI

Request repair for external device

Component

error

HDMI

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

Replace Main B/D

Screen

normal?

N

Y

Check S/W Version

Y

N Check

version

S/W Upgrade

Y

N Normal

screen?

End

Y

N

Replace Main B/D

Replace Module

Screen

normal?

End

Established

date


Error

symptom


A7 A8/ A9

Check Test pattern

N

2013. 01 .24



B. Power error

No power

Power LED

On?

Y

N

DC Power on by pressing Power Key On Remote control

Y

N Normal

operation? Check Power

On ‘”High”

Check Power cord was inserted properly

Check

Power LED

Replace Power B/D

Measure voltage of each output of Power B/D

N

Y Normal

voltage? Replace Main B/D

Y OK?

Replace Main B/D

N

Y

Normal?

Check ST-BY 3.5V

Replace Power B/D N

Y Normal

voltage?

Replace Power B/D

Y

A11

A12

A13

A4


Established

date


Error

symptom

. Stand-By: Red

※ Close

2013. 01 .24



B. Power error

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

Error? 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 CPU

Abnormal

(If Power Off mode is

not displayed)

Check Power B/D

voltage

Y

N

Replace Main B/D Normal

voltage?

Replace Power B/D

Replace Power B/D

N

Y Normal? End

※ Caution Check and fix exterior of Power B/D Part

A14

A13

Established

date


Error

symptom


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_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.

Abnormal

1

2013. 01 .24



No audio Screen normal

Check user

menu >

Speaker off Off

N

Y

Cancel OFF

Check audio B+ 24V

of Power Board Normal

voltage

Y

N

Replace Power Board and repair parts

Check Speaker disconnection

N

Y

Replace Speaker

Replace MAIN Board End

C. Audio error

No audio/ Normal video

A15 A16

Disconnection

Established

date


Error

symptom


2013. 01 .24



→ abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio

C. Audio error

Wrecked audio/ discontinuation/noise

Wrecked audio/ Discontinuation/

Noise for all audio

Check and replace speaker and connector

Wrecked audio/ Discontinuation/

Noise only for RF

Wrecked audio/ Discontinuation/ Noise only for External Input

Connect and check other external device

N

Y

Normal audio?

Check and fix external device

Replace Power B/D

N

Y Normal

voltage?

Check input signal -RF -External Input signal

Signal normal?

(When RF signal is not received) Request repair to external cable/ANT provider

Y

Check audio B+ Voltage (24V)

Replace Main B/D

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

Replace Main B/D

N

End

Established

date


Error

symptom


A16

2013. 01 .24



D. Function error

Remote control & Local switch checking

Y

N

1. Remote control(R/C) operating error

Check R/C itself

Operation Normal

operating?

Normal operating?

Y

Close

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

Normal operating?

Check B+ 3.5V

On Main B/D

A17

Normal Voltage?

Close

N

N

Check 3.5v on Power B/D

Replace Power B/D or

Replace Main B/D

(Power B/D don’t have problem)

A4

Check IR

Output signal

Normal Signal?

N

Y

Repair/Replace

IR B/D

N

A17

Replace

Main B/D

Y

A17


Established

date


Error

symptom

2013. 02. 02



Check technical information - Fix information - S/W Version

N

Y

Technical information?

Check input signal

Signal input?

Y

N

External Input and Component

Recognition error

Check and fix external device/cable

RGB,HDMI/ DVI, Optical

Recognition error

Replace Main B/D

Replace Main B/D Fix in accordance

with technical information

D. Function error

External device recognition error

Established

date


Error

symptom


2013. 02. 02



Check location of noise

Identify nose type Circuit

noise

Replace PSU(with LED driver)

Replace LED driver

Mechanical

noise

Check location of noise

OR

※ 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.

E. Noise

Circuit noise, mechanical noise

Established

date


Error

symptom


2013. 02. 02



Replace module Zoom part with exterior damage

Module

damage

Cabinet

damage Replace cabinet

Replace remote controller Remote

controller

damage

Stand

dent Replace stand

F. Exterior defect

Exterior defect

Established

date


Error

symptom


2013. 02. 02



Contents of LCD TV 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+ measuring method A2

3 Check White Balance value A3

4 Power Board voltage measuring method A4

6 A. Video error_ No video/Video lag/stop

TUNER input signal strength checking method A5

7 LCD-TV Version checking method A6

9

A. Video error_Color error

LCD TV connection diagram A7 10

11 Check Link Cable (LVDS) reconnection condition

A8

A9

12 Adjustment Test pattern - ADJ Key A10

13

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

LCD TV connection diagram A8

14 Check Link Cable (LVDS) reconnection condition

A8

A9

15 Adjustment Test pattern - ADJ Key A10

16

<Appendix>

Defected Type caused by T-Con/ Inverter/ Module

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

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

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

19 Exchange Module itself (1) A-4/5

20 Exchange Module itself (2) A-5/5

Continue to the next page



Contents of LCD TV Standard Repair Process Detail Technical Manual

No. Error symptom Content Page Remarks

21

B. Power error_No power

Check front display LED A11

22 Check power input Voltage & ST-BY 3.5V A12

23 Checking method when power is ON A13

24 POWER BOARD voltage measuring method A4

25

26 B. Power error_Off when on, off while viewing

POWER OFF MODE checking method A14

28

C. Audio error_No audio/Normal video

Checking method in menu when there is no audio

A15

29 Voltage and speaker checking method when there is no audio

A16

30 C. Audio error_Wrecked audio/discontinuation

Voltage and speaker checking method in case of audio error

A16

31 D. Function error_ No response in remote controller, key error

Remote controller operation checking method A17

Continued from previous page



Standard Repair Process Detail Technical Manual

Check Back Light On with naked eye

A. Video error_No video/Normal audio

<ALL MODELS>

A1

Established date

Revised date

Error

symptom

Content

LCD TV

Power On -> disjoint back case -> check lighting from the module

2013. 02.15




Inverter B+ 24V measuring method


A2

Established date

Revised date

Error

symptom

Content

LCD TV

Measure DC Voltage applying to Module from Power Board.

*Output Voltage from Power Board -> supply to Module.

Check Pin contacting statement and connection statement.

<ALL MODELS>

2013. 02 .15

*Output Voltage is depend on inch

32 inch : 65.6~86.9V

39 inch : 117.3~142.2V

42 inch : 141.8~164.3V




Check White Balance value


<ALL MODELS>

A3

Established date

Revised date

Error

symptom

Content

LCD TV

Entry method

1. Press the ADJ button on the remote controller for adjustment. 2. Enter into W/B ADJUST 3. After recording the R, G, B (GAIN, Offset) value of Color Temp (Cool/Medium/Warm),

re-enter the value after replacing the MAIN BOARD. 4. Confirm W/B ADJUST “OK” at In-start menu.

2013. 02.15




Power Board voltage measuring method

A. Video error_No video/ Audio

A4

Established date

Revised date

Error

symptom

Content

LCD TV

Check the DC 24V, 12V, 3.5V.

18 Pin (Power Board ↔ Main Board) - Common

1 Power on 2 DRV ON

3 3.5V 4 PDIM

5 3.5V 6 N/C

7 GND 8 GND

9 24V 10 24V

11 GND 12 GND

13 12V 14 12V

15 12V 16 N.C

17 GND 18 GND

Edge LED

2013. 02.15




LCD-TV Version checking method

A. Video error_Video error, video lag/stop

1. Checking method for remote controller for adjustment

Press the IN-START with the remote controller for adjustment

Version

<ALL MODELS>

A6

Established date

Revised date

Error

symptom

Content

LCD TV 2013. 02.15




LCD TV connection diagram (1)

A. Video error _Vertical/Horizontal bar, residual image, light spot

As the part connecting to the external input, check the

screen condition by signal

A7

Established date

Revised date

Error

symptom

Content

LCD TV

<ALL MODELS>

2013. 02.15



1. Check and replace LVDS Cable 2. Check LVDS connection condition


Check and replace Link Cable(LVDS) and contact condition


<ALL MODELS>

A8/A9

Established date

Revised date

Error

symptom

Content

LCD TV 2013. 02.15




Adjustment Test pattern - ADJ Key


You can view 6 types of patterns(with White and Full White) using the ADJ Key Checking item : 1. Defective pixel 2. Residual image 3. MODULE error (ADD-BAR,SCAN BAR..) 4.Video error (Classification of MODULE or Main-B/D!)

A10

Established date

Revised date

Error

symptom

Content

LCD TV 2013. 02.15



Solder defect, CNT Broken

T-Con Defect, CNT Broken T-Con Defect, CNT Broken T-Con Defect, CNT Broken

Solder defect, CNT Broken Solder defect, CNT Broken

Solder 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)



Abnormal Power Section Solder defect, Short/Crack Abnormal Power Section

Solder defect, Short/Crack Fuse Open, Abnormal power section

Noise GRADATION GRADATION

Abnormal Display

Appendix : Exchange T-Con Board (2)



Appendix : Exchange PSU(LED driver)

No Light Dim Light

Dim Light Dim Light

No picture/Sound Ok



Appendix : Exchange the Module (1)

Panel Mura, Light leakage Press damage

Crosstalk Crosstalk Press damage

Panel Mura, Light leakage

Press damage

Un-repairable Cases

In this case please exchange the module.



Vertical Block Source TAB IC Defect

Horizontal Block Gate TAB IC Defect

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.




Check front display LED

B. Power error _No power

A11

Established date

Revised date

Error

symptom

Content

LCD TV

ST-BY condition: Red

2013. 02.15




Check power input voltage and ST-BY 3.5V


A12

Established date

Revised date

Error

symptom

Content

LCD TV



1 Power on 2 DRV ON

3 3.5V 4 PDIM

5 3.5V 6 N/C

7 GND 8 GND

9 24V 10 24V

11 GND 12 GND

13 12V 14 12V

15 12V 16 N.C

17 GND 18 GND

Edge LED

2013. 02.15




Checking method when power is ON


A13

Established date

Revised date

Error

symptom

Content

LCD TV



1 Power on 2 DRV ON

3 3.5V 4 PDIM

5 3.5V 6 N/C

7 GND 8 GND

9 24V 10 24V

11 GND 12 GND

13 12V 14 12V

15 12V 16 N.C

17 GND 18 GND

Edge LED

2013. 02.15



Entry method 1. Press the IN-START button of the remote controller for adjustment 2. Enter to ENGINEER OPTION 3. Enter and Check POWER OFF HISTORY


POWER OFF MODE checking method

B. Power error _Off when on, off whiling viewing

<ALL MODELS>

A14

Established date

Revised date

Error

symptom

Content

LCD TV 2013. 02. 15



Checking method 1. Press the MENU button on the remote controller

2. Select the AUDIO function of the Menu 3. Check whether TV Speaker is on


Checking method in menu when there is no audio


<ALL MODELS>

A15

Established date

Revised date

Error

symptom

Content

LCD TV 2013. 02.15



Checking order when there is no audio

① Check the contact condition of or 24V connector of Main Board

② Measure the 24V input voltage supplied from Power Board (If there is no input voltage, remove and check the connector)

③ Connect the tester RX1 to the speaker terminal and if you hear the Chik Chik sound when you touch the GND and output terminal, the speaker is normal.


Voltage and speaker checking method when there is no audio


<ALL MODELS>

A16

Established date

Revised date

Error

symptom

Content

LCD TV

②



1 Power on 2 DRV ON

3 3.5V 4 PDIM#1

5 3.5V 6 PDIM#2

7 GND 8 GND

9 24V 10 24V

11 GND 12 GND

13 12V 14 12V

15 12V 16 N.C

17 GND 18 GND

2013. 02. 15.

①

③

②



Checking order 1, 2. Check IR cable condition between IR & Main board. 3. Check the st-by 3.5V on the terminal 4.


Remote controller operation checking method

D. Function error_ No response in remote controller,

key error

<ALL MODELS>

A17

Established date

Revised date

Error

symptom

Content

LCD TV

P600

1 GND

2 KEY1

3 KEY2

4 3.5V_ST

5 GND

6 LED_R/BUZZ

7 IR

8 GND

9 GND ①

③

2013. 01 .09

②



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