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

Internal Use Only North/Latin America Europe/Africa Asia/Oceania

http://aic.lgservice.com http://eic.lgservice.com http://biz.lgservice.com

LED TV SERVICE MANUAL CHASSIS : LB45B

MODEL : 32LB55*A

32LB55*A-T*

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

CONTENTS

CONTENTS CONTEN TS ................. .................................... ...................................... ...................................... ....................................... .................... 2 SAFETY PRECAUTIONS PRECAUTIONS ................... ....................................... ....................................... ................................. .............. 3 SERVICING SERVI CING PRECAUT PRECAUTIONS IONS.................. ...................................... ....................................... .............................. ........... 4 SPECIFICA SPECIFIC ATION ................... ...................................... ....................................... ....................................... ............................. .......... 6 ADJUSTMENT ADJUSTME NT INSTRUCT INSTRUCTION ION ................................................. ................................................................ ............... 9 BLOCK DIAGRAM................... DIAGRAM ...................................... ...................................... ....................................... ......................... ..... 13 EXPLODED EXPLODE D VIEW ................... ...................................... ...................................... ....................................... ......................... ..... 14 SCHEMATIC SCHEMA TIC CIRCUIT DIAGRAM .................. ...................................... ....................................... ........................ .....

CONTENTS

CONTENTS CONTEN TS ................. .................................... ...................................... ...................................... ....................................... .................... 2 SAFETY PRECAUTIONS PRECAUTIONS ................... ....................................... ....................................... ................................. .............. 3 SERVICING SERVI CING PRECAUT PRECAUTIONS IONS.................. ...................................... ....................................... .............................. ........... 4 SPECIFICA SPECIFIC ATION ................... ...................................... ....................................... ....................................... ............................. .......... 6 ADJUSTMENT ADJUSTME NT INSTRUCT INSTRUCTION ION ................................................. ................................................................ ............... 9 BLOCK DIAGRAM................... DIAGRAM ...................................... ...................................... ....................................... ......................... ..... 13 EXPLODED EXPLODE D VIEW ................... ...................................... ...................................... ....................................... ......................... ..... 14 SCHEMATIC SCHEMA TIC CIRCUIT DIAGRAM .................. ...................................... ....................................... ........................ .....

SAFETY PRECAUTIONS IMPORTANT SAFETY NOTICE Many electrical electrical and mechanical mechanical parts in this chassis have special special safety-related safety-related characteristics. 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

Leakage Current Hot Check (See below Figure) Plug the AC cord directly into the AC outlet.

An isolation Transformer should always be used 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.

Do not use a line Isolation Transformer 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. 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 Keep wires away from high voltage or high temperature parts.

Before returning the receiver to the customer, always perform an AC leakage current check

SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this service manual and its supplements and addenda, read and follow the SAFETY PRECAUTIONS on 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 CAUTION installation of electrolytic capacitors may result in an explosion hazard. 2. Test 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. CAUTION Unless specied otherwise in this service manual, lubrication of contacts in not required.

2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly. 3. Use only a grounded-tip soldering iron to solder or unsolder ES devices. 4. Use only an anti-static type solder removal device. Some solder removal devices not 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 cirCAUTION cuit, 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 clothes fabric or the lifting 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.

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.

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 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 Connect Connections ions 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.

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

1. Application range

3. Test method

This specification is applied to the LB45B chassis.

1) Performance: LGE TV test method followed 2) Demanded other specification - Safety : CE, IEC specification - EMC : CE, IEC

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.

4. Model General Specification * HDMI 1.4 with Deep Color is only apply for FHD Model No.

Item

Specication

1.

Market

NON EU

2.

Broadcasting system

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

BAND 3.

Channel Storage

PAL(BG,I)

NTSC(M)

Remarks

China(DK)

VHF/UHF

01-C69

2~78

C1~C69

Cable

S1~S47

1~71

S1~S47

5. Component Video Input(Y, P B, 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


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 1

Resolution

H-freq. (kHz)

V-freq. (Hz)

Pixel clock (MHz)

Proposed

640×480

31.469

59.94

25.17

VESA(VGA)

7. HDMI input (DTV) No.

Resolution

H-freq. (kHz)

V-freq. (Hz)

Pixel clock(MHz)

Proposed

1

720*480

15.73

59.94

13.500


2

720*480

15.75

60.00

13.514


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

Remarks

Spec. out but display.

ADJUSTMENT INSTRUCTION 1. 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. * 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.

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

EDID D/L

0. Tool Option1

HDMI1

1. Tool Option2

HDMI2

2. Area Option

NG NG

Start

Reset

3. ADC Calibration 9. W/V ADJUST 5. EDID D/L(AC3)

►

EDID D/L HDMI1

OK

HDMI2

OK

Start

Reset

■ 8BIT FHD Large Inch 32LB5**A Models(LB45B) ** HDMI 1 : 256Bytes 0 1 2 3 4 5 6 7 8 9 A 0 00 FF FF FF FF FF FF 00 1E 6D 01 10 01 18 01 03 80 A0 5A 78 0A F3 30

B C D E F 00 01 01 01 01 A4 54 46 96 26

20 30 40 50

0F 01 55 48

49 01 00 88

4B 21 08 01 01 01 C4 8E 21 35 00 BC

00 01 00 77

45 01 00 21

40 01 01 1D 00 72 1E 1B 21 00 00 1C

61 40 01 01 51 D0 1E 20 50 A0 51 00 00 00 00 FC

01 01 6E 28 1E 30 00 4C

60 70

47 00

20 3A

54 56 0A 3F 1C 44

20 0F

20 00

20 0A

20 20

00 FD 01 ⓐ

20 20

20 20

20 20

00 20

00 20

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.

5.4. Adjustment Command (Protocol) (1) RS-232C Command used during auto-adj. RS-232C COMMAND CMD DATA ID wb 00 00 wb

5.2. Equipment (1) Color Analyzer: CA-210 (NCG: CH 9 / WCG: CH12 / LED: CH14)

Begin White Balance adjustment End White Balance adjustment (internal pattern disappears)

ff

(2) Adjustment Map Adj. item

Cool

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.

00

Explanation

Medium

Warm

R Gain G Gain B Gain R Cut G Cut B Cut R Gain G Gain B Gain R Cut G Cut B Cut R Gain G Gain B Gain R Cut G Cut B Cut

Command (lower caseASCII) CMD1 CMD2 j g j h j i

Data Range (Hex.) MIN MAX 00 C0 00 C0 00 C0

j j j

a b c

00 00 00

C0 C0 C0

j j j

d e f

00 00 00

C0 C0 C0

Default (Decimal) 172 192 192 64 64 64 192 192 192 64 64 64 192 192 192 64 64 64

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.

(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. Mode

Color Temp

Color coordinate

Cool (C50)

13,000 K

x = 0.271 (±0.015) y = 0.270 (±0.015)

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)

Remark * Test signal - Inner pattern for W/B adjust - External white pattern (80IRE, 204gray)

* 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 (normal line) March ~ December

- AUO/ INX/ COST/ SHARP/ BOE 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

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

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

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’

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”.

* 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 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.

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

0 0 5

2 0 5

0 0 4

1 0 5

1 2 5 0 1 4

1 2 1

0 0 9

EAX65550501

LB45B/LT5B

COMPONENT / AV IN / AV AUDIO OUT

JK101 PPJ239-06 7H JK101-*1 PPJ239-26 6H [RD4]E-LUG

6H

AV2RIN

R117 ZD110 20V

5H [RD4]O-SPRING 4H [RD4]CONTACT

R116 220K

AV2_RIN

10K

R118 12K

4H

C108 470pF 50V

5G [WH3]O-SPRING 4F [YL]CONTACT

5G

AV2LIN

R114 ZD109 20V

5F [YL]O-SPRING 7F [YL]E-LUG-S

R113 220K

AV2_LIN

10K

R115 12K

4F

C107 470pF 50V

5E [RD3]O-SPRING 7E [RD3]E-LUG-S

6F

AV2_VIN

AV2_VIN D101

5D [WH2]O-SPRING

8F

D102

ZD108 SD05 READY

R151 75 READY

R112 75

Size check!! 6D [WH2]E-LUG 6N [RD2]E-LUG

5E

MNTROUT

5N [RD2]O-SPRING 4N [RD2]CONTACT

1K

C105 5600pF 50V

ZD107 20V

8E

C106

R111

C E

B

MNT_ROUT

10uF

Q103

C E

B

MMBT3904(NXP)

16V

MUTE_AOUT

POP NOISE

READY Q104 MMBT3904(NXP)

5M [WH1]O-SPRING 5L [RD1]O-SPRING 7L [RD1]E-LUG-S 5K [BL]O-SPRING

5D

MNTLOUT

4J [YL/GL]CONTACT

7D

1K

C103 5600pF 50V

ZD106 20V

C E

MNT_LOUT

10uF C

B

B

16V

Q101

MUTE_AOUT

MMBT3904(NXP)

E

POP NOISE

READY Q102 MMBT3904(NXP)

5J [YL/GL]O-SPRING [YL/GL]E-LUG 6J GREEN & YELLOW

C104

R110

7K [BL]E-LUG-S

7N

6N

R108

COMMONRIN

ZD105 20V

R107 220K

ZD104 20V

R104 220K

COMMON_RIN

10K

R109 12K

4N

5M 5L

R105

COMMONLIN

COMMON_LIN

10K

R106 12K

C101 470pF 50V

COMP_PR

COMP_PR

8L

D103 D104

5K

C102 470pF 50V

ZD102 SD05 READY

R103 75

ZD101 SD05 READY

R102 75

COMP_PB

COMP_PB D105

8K D106

V-OUT Buffer(DEBUG)

4J 6J

COMMON_VIN

COMMON_VIN

P_12V

D107

7J

D108

ZD100 SD05 READY

R101 75

R150 75 READY DEBUG

Size check!!

AV2_VIN

OPT

TP101

R122 0

C E

B

MMBT3904(NXP) Q105 R121 33

DEBUG

MNT_VOUT

DEBUG

R120 75 DEBUG

R123 220

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.

32/42LB550A INPUT1

2013/08/15 1

7

EAX65550501

LB45B/LT5B

HDMI(REAR)

I2C Control

R231 1K

KJA-PH-1-0177 JK201

With UART IC

C

R230 10K

HDMI1_HPD

Q230

B

E

IC201 6

M6

1

M1

3

+3.5V_ST

+3.5V_ST

MMBT3904(NXP)

MAX3232CDR

K 5 0 4 1 2 R

W/O UART IC R206 VCC

M3_DETECT

4

M4

5

M 5 _ G ND

C201 0.1uF C I T R A U O / W

T R A U

GND

With UART IC

C I

R205 0

R201 100 R204 0

DOUT1

16

1

15

2

14

3

13

4

C1+

With UART IC

V+

C202 0.1uF

RIN1

C1-

C203 0.1uF

C2+

With UART IC ROUT1

12

5

C2-

DIN1

19

17

C204 0.1uF

16 15

12505WS-04A00 DIN2

11

6

10

7

9

8

V-

DOUT2

14

With UART IC

13

C205 0.1uF

12

1

11 ROUT2

RIN2

10

2 EAN41348201

9 8

3

7 4

6

P202 +3.5V_ST

5

12507WS-04L

VCC

PM_RXD

5 4

1

3 2

2

1 GND

RM_TXD

Y D A E R

20

With UART IC

DEBUG P201

1 V 4 0 2 3 D

READY ZD230

SHIELD With UART IC

18 R202 100

O / W

+5V_USB

HDMI1_DET

100

HPD +5V_POWER

R232 R233 2.7K 2.7K

DDC/CEC_GND

READY ZD231

D N G

SDA SCL

R236 100

HDMI1_SDA HDMI1_SCL

R237 100

ESD_HDMI2_IP4283

CEC

TMDS_CH1-

1

10

2

9

3

8

READY ZD233

NC_4

CLKTMDS_CH1+

CLK_SHIELD GND_1

CLK+ DATA0-

TMDS_CH2-

4

7

5

6

HDMI1_CK-

NC_3

GND_2

HDMI1_CK+ HDMI1_D0-

NC_2

DATA0_SHIELD TMDS_CH2+

DATA0+

NC_1

HDMI1_D0+ HDMI1_D1-

DATA1D235 IP4283CZ10-TBA

DATA1_SHIELD

ESD_HDMI2_IP4283

DATA1+

TMDS_CH1-

1

10

2

9

3

8

4

7

5

6

HDMI1_D1+ HDMI1_D2-

NC_4

DATA2TMDS_CH1+

DATA2_SHIELD DATA2+

GND_1

TMDS_CH2-

3

JK203

4

READY ZD232

D234 IP4283CZ10-TBA

NC

TMDS_CH2+

NC_3

GND_2

HDMI1_D2+

NC_2

NC_1

5

A D S _ B U S D

L C S _ B U S D

GND

R242 1K

HDMI2_HPD

C

R241 10K

Q240

B

+3.5V_ST

MMBT3904(NXP) E

K 6 0 4 1 2 R

READY ZD240

Y D A E R

2 V 4 0 2 3 D

SHIELD

T E D _ 2 I M D H

+5V_USB

20 19 18 17 16

USB(SIDE)

15 +5V_USB 14 13

Close to SIDE_USB

L220 OPT

C220 10uF 10V

3AU04S-305-ZC-(LG) JK202 U S B D O W N S T R E A M

12 C221 22uF 10V

120OHM

11 10 9

1

8 2

USB_DN

7 6

3

4

USB_DP READY ZD220 30V

5

READY ZD221 30V

4 3

5

2 1

HPD +5V_POWER DDC/CEC_GND SDA

R243 R244 2.7K 2.7K READY ZD241

READY ZD242

R247 100 R248 100

SCL D244 IP4283CZ10-TBA

NC

ESD_HDMI2_IP4283

CEC CLKCLK_SHIELD CLK+

TMDS_CH1-

TMDS_CH1+

GND_1

1

10

2

9

3

8

4

7

5

6

NC_4

HDMI2_CK-

NC_3

HDMI2_CK+ HDMI2_D0-

GND_2

DATA0DATA0_SHIELD DATA0+

TMDS_CH2-

TMDS_CH2+

NC_2

NC_1

HDMI2_D0+

NC_4

HDMI2_D1-

DATA1DATA1_SHIELD

D245 IP4283CZ10-TBA

DATA1+ DATA2DATA2_SHIELD

HDMI2_SDA HDMI2_SCL

READY ZD243

ESD_HDMI2_IP4283 TMDS_CH1-

TMDS_CH1+

1

10

2

9

NC_3

HDMI2_D1+ HDMI2_D2-

DATA2+ GND_1

TMDS_CH2-

3

8

4

7

5

6

GND_2

NC_2

JK204 TMDS_CH2+

HDMI2_D2+

NC_1

ESD_HDMI_IP4294 ESD_HDMI_IP4294 ESD_HDMI_IP4294 ESD_HDMI_IP4294 D235-*1 D245-*1 D244-*1 D234-*1 IP4294CZ10-TBR IP4294CZ10-TBR IP4294CZ10-TBR IP4294CZ10-TBR 1 10 1 10 1 10 1 10


2

9

2

9

2

9

2

9

3

8

3

8

3

8

3

8

4

7

4

7

4

7

4

7

5

6

5

6

5

6

5

6

32/42LB550A INPUT2

2013/08/15

2

7

EAX65550501

LB45B/LT5B

SW_RESET C320 1000pF 50V

V 0 5

I2S_MCLK R 30 4 +3.3V_M

C301 0.1uF 16V

C302 0.1uF 16V

C303 1uF 10V

R 30 1

I2S_SDO I2S_WS I2S_SCK AUAMP_SDA

R 30 6

1 00

R 30 7

1 00

F p 0 0 0 2 2

+24V_AMP

TAIYO YUDEN

L301

BLM18PG121SN1D

OPT

9 1 3 C

1 00

1 00

C321 10uF 6.3V

C322 0.1uF 16V

C318 0.1uF 50V

D N G ] P E [

O I _ D D V

O I _ D N G

L303-*1 10.0uH

C317 10uF 35V

A A B I T A 1 A 1 1 _ E 1 D 1 D D K S T N T D D L D E S G U V V C A R B P O P P

SPK_L+ R313 12

NC_1

1 2

NC_2

3

30 OUT1B 29 PGND1B

THERMAL 41

GND

4 5

IC301

DVDD

6

NTP7514

SDATA

7

0x54

1 00

WCK

8

R 30 3

1 00

BCK

9

SDA

10

4.7K

SPEAKER_L C331 0.1uF 50V

L304 10uH ABCO

R316 12

R323 4.7K SPK_L-

TAIYO YUDEN L304-*1 10.0uH

C315 22000pF 50V

28 BST1B 27 VDR1

NC_3

R 30 2

R315 12

R322

C330 0.1uF 50V C329 0.47uF 50V

C326 390pF 50V

0 9 8 7 6 5 4 3 2 1 4 3 3 3 3 3 3 3 3 3

VDD_PLL

ABCO L303 10uH

R314 12

C325 390pF 50V

26 NC_4 25 AGND

JP304 SPK_L+

SPK_L+

24 VDR2 23 BST2A

C312 1uF 10V

22 PGND2A 21 OUT2A

SPK_L3

JP302 SPK_R+

SPK_R+

C311 22000pF 50V

4

JP303

SPK_L-

C314 1uF 10V

2

JP301 SPK_R-

SPK_R-

1 .

1 2 3 4 5 6 7 8 9 0 1 1 1 1 1 1 1 1 1 2 AUAMP_SCL

R308 4.7K

R309 4.7K

SMAW250-H04R

P301 C305 33pF 50V

TAIYO YUDEN

C306 33pF 50V

L T 0 1 2 B B B B A C L _ _ _ 2 2 2 2 2 S U R R R T D T D D A O O O S N U D D F T T T B G O V V I I I P P P N N N O O O M M M

+3.3V_M

L305-*1 10.0uH +24V_AMP

C308 50V

R318 12

ABCO L305 10uH

C334 0.1uF 50V

C327 390pF 50V C309 0.1uF 50V

22000pF

R317 12

SPK_R+

C310 10uF 35V

C328 390pF 50V R319 12

R324 4.7K

C333 0.47uF 50V

SPEAKER_R

L306 10uH ABCO

R320 12

C335 0.1uF 50V

R325 4.7K

TAIYO YUDEN SPK_R-

L306-*1 10.0uH

READY R311 POWER_DET 100

AUDIO_OUT AMP : GAIN X 4 IC302 AS324MTR-E1

P_12V

C350 0.1uF 16V C

B

Q350 MMBT3904(NXP) R 35 1

1 OUT1

1K

E

MNT_LOUT R350 4.7K

C351 6800pF 50V

R 35 2

C352

OUT4 14

1 0K

33pF50V

2 I NP UT 1-

INPUT4- 13

3 I NP UT 1+

INPUT4+ 12

R353 6.8K

R 35 4

MNT_L_AMP

5 .6 K

P_12V

4 VCC

GND 11

C353 0.1uF 16V

R 35 5

MNT_R_AMP

C354

5 .6 K

5 I NP UT 2+

INPUT3+ 10

6 I NP UT 2-

INPUT3- 9

33pF50V

P_12V R 35 6

1 0K

R357 6.8K

C355 0.1uF 16V C

Q351 MMBT3904(NXP) R 35 8 B

7 OUT2

1K

E

OUT3 8

MNT_ROUT R359 4.7K


C356 6800pF 50V

32/42LB550A AUDIO

2013/08/15 3

7

EAX65550501

LB45B/LT5B

IF PA L TU401 TDJH-G101D

+3.3V_TU

close to the tuner pin.

1 2

C406 100pF 50V

B1[+3.3V]

C405 0.1uF 16V

IR/LED+Control

+3.3V_M

L401 BLM18PG121SN1D

C404 22uF 6.3V

C411 0.1uF 16V

C412 10uF 6.3V

+3.5V_ST

NC_1 +3.3V_TU

3 4 5 6 7 8 9

IF_AGC

R412 100

SC L

R407 2.2K

should be guarded by ground

R405 C402 47pF 50V

SD A

33

R406

IF[P]

R422 10K

33

R408 2.2K KEY1

TUNER_SCL

TUNER_SDA

ZD401 SD05

OPT C421 0.1uF

P421 12507WR-10L

KEY2

ZD402 SD05

IF_P

OPT C422 0.1uF

1

2

IF[N] NC_2

C403 47pF 50V

NTSC R413-*1 0

R413 10 PAL

R421 10K

IF_AGC

C410 0.1uF 16V

R414 10 PAL

IF_N

NTSC R414-*1 0

Close to the tuner

+3.5V_ST

3 L421

BLM18PG121SN1D 4

NC_3

R423 3.3K OPT

C423 0.1uF 16V

C424 1000pF 50V

5

LED OPT C425 0.1uF 16V

ZD403 LED_R_Zener

6

NTSC TU403 TDJH-H101F

A1

A1

B1

B1 1 2

47

3 4 5

SHIELD

6 7 8 9

A1

A1

B1

7

IR ZD404 IR_Zener

C426 100pF 50V

8

B1[+3.3V] 9

NC_1 IF_AGC

10 SCL 11

SDA IF[P] IF[N] NC_2 NC_3

B1

47 SHIELD


32/42LB550A TUNER

&

IR

2013/08/15 4

8

EAX65550501

LB45B/LT5B

FHD P602 FI-RE51S-HF-J-R1500

1 2 3 4 5 6 7 8 9 10 11 12

RXA3+

13

RXA3-

14

RXACK+

15

RXACK-

16 17

HD P601

RXA2+

FF10001-30

RXA2-

18 19

RXA1+

20

RXA1-

1 2 3

21 4 22 23

RXA0+ 5

RXA0-

6

24

7

25

8

26

9 27 28

RXB3+

29

RXB3-

30

RXBCK+

31

RXBCK-

32

RXB2+

33

10 11 12 13 14 15

RXB216

34 17 35 36

RXB1+ 18

RXB1-

19

37 38

RXB0+

39

RXB0-

20 21 22

40 23 41 24

42

25

43

26

44

27

45

28 46 29 47

PANEL_VCC

48

30

[30] [29] [28] [27] [26] [25]

RXA0-

[24]

RXA0+

[23] [22]

RXA1-

[21]

RXA1+

[20] [19]

RXA2-

[18]

RXA2+

[17] [16]

RXACK-

[15]

RXACK+

[14] [13]

RXA3-

[12]

RXA3+

[11] [10] [09] [08] [07] [06] [05]

PANEL_VCC

[04] [03]

HD L601 120OHM

[02] [01] HD C603 0.1uF 16V

31

49 FHD L602 120OHM

50

OPT C602 1000pF 50V

OPT C601 10uF 16V

.

51 FHD 52


C606 0.1uF 16V

OPT C605 1000pF 50V

OPT C604 10uF 16V

32/42LB550A LVDS

2013/08/15 6

7

EAX65550501

LB45B/LT5B

** 3.5V_ST -> 1.26V VDDC FROM

LIPS

&

POWER

B/D +3.5V_ST

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

IN_2

IN_1

C740 10uF 6.3V

+3.5V_ST MMBT3906(NXP) Q722 E

NC

PWM_DIM_120HZ R729-*1

PWR_ON L704

L701 500-ohm

3

3.5V

5

GND

7

L702

24V

9

10

24V

120OHM

GND

11

12

GND

12V

13

14

12V

P_12V C705 0.1uF 16V ZD701 20V READY

2 DRV_ON 4 PDIM#1

1

3.5V

6 3.5V 8 PDIM#2

+24V_AMP

C707 0.1uF 50V

3

5

4

R742

L703

12V

120OHM

GND

15 17

16

NC

18

GND

R710 100

R1

R2 1%

GND

C742 10uF 6.3V

R740 2.7K

R741 4.7K

R715 10K

PWM_DIM_60HZ R729

C

1K

EN

issue

3 V 0 5 7 D . 2 Z

1 FB

+3.5V_ST

R714 1K

100

C702 0.1uF 16V

Add for improving main IC Burtn OUT_2

2

6

C741 0.1uF 16V

+3.3V_M RL_ON

ZD702 SD05

7

OUT:1.26V

1

T H E R 9M A L

1%

R744 10K

P701 SMAW200-H18S5

+3.5V_ST

500-ohm

8

OUT_1

C

B

C701 10uF 10V 2012

+1.2V_VDDC

IC701 MP20051

[EP]GND

B

PWM_DIM

R716 10K INV_ON

** 3.3V_M -> 1.8V_M

Q703 E 100 R728 PWM_DIM_120HZ

MMBT3904(NXP)

IC711 AP1117E18G-13

+3.3V_M

IN 3

C743 10uF 6.3V

ADJ/GND 1

C744 0.1uF 16V

+1.8V_M 2 OUT Add for improving main IC Burtn

C745 10uF 6.3V

issue

4 0 V 7 5 D Z

19 .

** +3.5V_ST -> 3.3V_M

**12V->USB

+3.5V_ST

5V

Q710 AO3435

L750 BLM18PG121SN1D

S

V0 = 0.8*(1+(R1/R2)) NR8040T4R7N L771 C771 1uF 25V

IC709 MP1497DJ

P_12V C774 0.1uF SS

L770 120OHM Closed IC709 C770 10uF 16V

IN

C772 0.1uF 16V

SW

GND

1

8

2

3

7

3A

4

6

5

FB

VCC

C750 0.1uF 16V Y D A E R

OUT:5V

+5V_USB

6.8uH Closed IC709

R1 R770 43K 1%

R771 33

R2

R778 47K

C776 22uF 10V

OPT

C777 10uF 10V

R748 33K

C753 4.7uF 10V

D

+3.3V_M C754 10uF 6.3V

C752 0.1uF 16V

G

R750 10K R749 2.2K

0 B 0 6 7 D . 5 Z

C

R747 10K

Q711 MMBT3904(NXP)

B

POWER_SW

R772 8.2K

E

1%

EN

BST

C775 0.1uF 16V

R777 100K C773 0.1uF 16V

+3.3V_M

** Switch Panel-Vcc P_12V PANEL_VCC Q720 DMP2130L

L761 120OHM

**

Jig 8 0 7 P J

Point_GND 9 0 7 P J

0 1 7 P J

S

OPT C762 0.1uF 25V

1 1 7 P J

R761 33K

R762 5.6K

C760 10uF 16V

D

G

DIODES

C761 0.1uF 16V

R765 5.6K

R766 5.6K

Q720-*1 AO3407A S

D

C

PANEL_ON


B Q721 E MMBT3904(NXP)

G

AOS

32/42LB550A POWER

2013/08/15 7

7

Standard Repair Process

Error symptom

LCD TV

A. Video error

Established date

No video/ Normal audio

Revised date

2013. 01 .24 1/14

First of all, Check whether all of cables between board is inserted properly or not. (Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable,,,) A1 No video Normal audio

Normal audio

Y

Check Back Light On with naked eye

N Move to No video/No audio

A4 Y

On

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

N

A2

Y

Replace T-con Board or module

N

Check Power Board 93.2~118.5V v output

Normal voltage

Normal voltage

Y

Repair Power Board or parts

Replace Inverter or module

N

End

Repair Power Board or parts

※Precaution

A6 & A3

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

Replace Main Board

Re-enter White Balance value


LCD TV

Established date

A. Video error

Error symptom

No video/ No audio

Revised date

A4 No Video/ No audio

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

Normal voltage? N Replace Power Board and repair parts

Y

Check and replace MAIN B/D End

2013. 01 .24 2/14


Error symptom

LCD TV

A. Video error

Established date

Picture broken/ Freezing

Revised date

2013. 01 .24 3/14

A5 Check RF Signal level

Normal Signal?

Y

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

N

A6

Check RF Cable Connection 1. Reconnection 2. Install Booster

Normal Picture?

Y

Check S/W Version

N Normal Picture? Y

N

SVC Bulletin?

N

Y

Check Tuner soldering

Normal Picture? N

S/W Upgrade Contact with signal distributor or broadcaster (Cable or Air)

Replace Main B/D Normal Picture? Y

Close Close

N

Y

Close


LCD TV

Error symptom

A. Video error

Established date

Tuning fail, Picture broken/ Freezing

Revised date

A5 Check RF Signal level

2013. 01 .24 4/14

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 Normal Signal?

Y

N

Check S/W Version

N

SVC Bulletin? Y S/W Upgrade

Contact with signal distributor or broadcaster

Normal Picture? Y Close

Close

N

Check Tuner soldering

Replace Main B/D


LCD TV

Error symptom

Established date

Color error

Revised date

Color error?

Y

N

Check and replace Link Cable (LVDS) and contact condition

Check Test pattern

5/14

Y Color error?

Y

Color error?

Replace Main B/D

Replace module

N

N End

Check error color input mode

A10

2013. 01. 24

A8/ A9

A7 Check color by input -AV -COMPONENT -HDMI

A. Video error

AV/ Component error

Check external device and cable

External device /Cable normal

Y

Replace Main B/D

N Request repair for external device/cable N HDMI error

Check external device and cable

External device Y /Cable normal

Replace Main B/D


LCD TV

Established date

A. Video error

Error symptom

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

2013. 01 .24

Revised date

6/14

Vertical/Horizontal bar, residual image, light spot

Replace Module

A7

A8/ A9

Check color condition by input -AV -Component -HDMI

Screen Y normal?

Check external device connection condition

Check and replace Link Cable

Screen normal?

N

N

N

Screen normal?

Replace Main B/D

Y

Y

Request repair for external device

Replace module

A10

Y Normal?

N

End

End

Check Test pattern

External device screen error-Color error Check S/W Version

Check version

N

Y

Check screen condition by input -AV -Component -HDMI

AV Input error

Component error

S/W Upgrade

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

Normal screen? Y End

N

HDMI

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

Screen normal?

N Replace Main B/D

Y Request repair for external device Y Screen normal?

N

Replace Main B/D


LCD TV

Error symptom

B. Power error

Established date

No power

Revised date

A11 Check Power LED

. Stand-By: Red

2013. 01 .24 7/14

A13 DC Power on by pressing Power Key On Remote control

Y

Power LED On? N

Normal operation?

N

Check Power On ‘”High”

OK?

Y

Check Power cord was inserted properly

Replace Main B/D

A4 Measure voltage of each output of Power B/D

N Normal? Y Y

Close

Y

Check ST-BY 3.5V

Normal Y voltage?

A12

Normal voltage?

Y

N Replace Power B/D

N

Replace Power B/D

Replace Main B/D

Replace Power B/D


LCD TV

Established date

B. Power error

Error symptom

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

2013. 01 .24

Revised date

8/14

Check outlet

A14 Check A/C cord

Error?

N

Check Power Off Mode

CPU Abnormal

Normal?

Replace Main B/D

Y

End

N Check for all 3- phase power out

Y

Fix A/C cord & Outlet and check each 3 phase out

Abnormal 1

A13 (If Power Off mode is not displayed) Check Power B/D voltage ※ Caution Check and fix exterior of Power B/D Part

* Please refer to the all cases which can be displayed on power off mode.

Replace Power B/D

Normal voltage?

Y

Replace Main B/D

N Replace Power B/D

"POWEROFF_REMOTEKEY" "POWEROFF_OFFTIMER" "POWEROFF_SLEEPTIMER" "POWEROFF_INSTOP" "POWEROFF_AUTOOFF" "POWEROFF_ONTIMER" "POWEROFF_RS232C" "POWEROFF_SWDOWN" "POWEROFF_UNKNOWN"

Power Power Power Power Power Power Power Power Power Power Power

off off off off off off off off off off off

by REMOTE CONTROL by OFF TIMER by SLEEP TIMER by INSTOP KEY by AUTO OFF by ON TIMER by RS232C by S/W Download by unknown status except listed case by abnormal status except CPU trouble by CPU Abnormal


LCD TV

Error symptom

C. Audio error

Established date

No audio/ Normal video

Revised date

A15 No audio Screen normal

Check user menu > Speaker off

2013. 01 .24 9/14

A16 N

Off

Check audio B+ 24V of Power Board

Normal voltage

Y Cancel OFF

Check Speaker disconnection

Y

N Replace Power Board and repair parts

Disconnection

Y Replace Speaker

N

Replace MAIN Board

End


LCD TV

C. Audio error

Error symptom

Wrecked audio/ discontinuation/noise

Established date

2013. 01 .24

Revised date

10/14

→ abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio A16

Check input signal -RF -External Input signal

Wrecked audio/ Discontinuation/ Noise for all audio Signal normal?

Check and replace speaker and connector

Check audio B+ Voltage (24V)

Y Normal voltage?

N

Wrecked audio/ Discontinuation/ Noise only for RF

Y

N

Replace Main B/D

Replace Power B/D (When RF signal is not received) Request repair to external cable/ANT provider (In case of External Input signal error) Check and fix external device

Replace Main B/D

Wrecked audio/ Discontinuation/ Noise only for External Input Connect and check other external device

Normal audio?

N

Y Check and fix external device

End


Error symptom

LCD TV

D. Function error

Established date

Remote control & Local switch checking

Revised date

2013. 02. 02 11/14

1. Remote control(R/C) operating error A17 Check R/C itself Operation

A17

Check & Repair Cable connection Connector solder

Normal Y operating? N

Normal operating? Y

Check R/C Operating When turn off light in room

Check & Replace Baterry of R/C

If R/C operate, Explain the customer cause is interference from light in room.

Normal operating? N Replace R/C

Replace Main B/D

Close

Close

N

A17

Check B+ 3.5V On Main B/D

A4

Normal Voltage?

Y

Check IR Output signal

N

Check 3.5v on Power B/D Replace Power B/D or Replace Main B/D (Power B/D don’t have problem)

Normal Signal? N Repair/Replace IR B/D

Y


LCD TV

Check input signal

Established date

D. Function error

Error symptom

External device recognition error

Y Signal input? N

Check and fix external device/cable

Check technical information - Fix information - S/W Version

Technical information?

2013. 02. 02

Revised date

N

External Input and Component Recognition error

12/14

Replace Main B/D

Y

Fix in accordance with technical information

RGB,HDMI/ DVI, Optical Recognition error

Replace Main B/D


LCD TV

Identify nose type

Error symptom

Circuit noise

Mechanical noise

E. Noise

Established date

Circuit noise, mechanical noise

Revised date

Check location of noise

2013. 02. 02

Replace PSU(with LED driver) OR

Replace LED driver

Check location of noise

※ 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.

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

※ 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)

13/14


LCD TV

F. Exterior defect

Error symptom

Zoom part with exterior damage

Exterior defect

Module damage

Replace module

Cabinet damage

Replace cabinet

Remote controller damage

Stand dent

Replace remote controller

Replace stand

Established date Revised date

2013. 02. 02 14/14

Contents of LCD TV Standard Repair Process Detail Technical Manual 1

Check LCD back light with naked eye

A1

LED driver B+ measuring method

A2

Check White Balance value

A3

Power Board voltage measuring method

A4

TUNER input signal strength checking method

A5

LCD-TV Version checking method

A6

LCD TV connection diagram

A7

Check Link Cable (LVDS) reconnection condition

A8 A9

12

Adjustment Test pattern - ADJ Key

A10

13

LCD TV connection diagram

A8

Check Link Cable (LVDS) reconnection condition

A8 A9

15


A10

16

Exchange T-Con Board (1)

A-1/5

17

Exchange T-Con Board (2)

A-2/5

Exchange LED driver Board (PSU)

A-3/5

19

Exchange Module itself (1)

A-4/5

20

Exchange Module itself (2)

A-5/5

2 3

A. Video error_ No video/Normal audio

4 6 7

A. Video error_ No video/Video lag/stop

9 10 11

14

18

A. Video error_Color error

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

Defected Type caused by T-Con/ Inverter/ Module

Continue to the next page

Contents of LCD TV Standard Repair Process Detail Technical Manual Continued from previous page

21

Check front display LED

A11

22

Check power input Voltage & ST-BY 3.5V

A12

Checking method when power is ON

A13

POWER BOARD voltage measuring method

A4

POWER OFF MODE checking method

A14

Checking method in menu when there is no audio

A15

Voltage and speaker checking method when there is no audio

A16

23

B. Power error_No power

24 25 26

B. Power error_Off when on, off while viewing

28 C. Audio error_No audio/Normal video 29 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

Standard Repair Process Detail Technical Manual LCD TV

Error symptom Content

A. Video error_No video/Normal audio Check Back Light On with naked eye


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

2013. 02.15 A1



A. Video error_No video/Normal audio Inverter B+ 24V measuring method


2013. 02 .15 A2

Measure DC Voltage applying to Module from Power Board. *Output Voltage from Power Board -> supply to Module. Check Pin contacting statement and connection statement.

*Output Voltage is depend on inch 32 inch : 65.6~86.9V 39 inch : 117.3~142.2V 42 inch : 141.8~164.3V


Error symptom

A. Video error_No video/Normal audio

Content

Check White Balance value


2013. 02.15

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.

A3


Error symptom

A. Video error_No video/ Audio

Content

Power Board voltage measuring method


2013. 02.15

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

A4



A. Video error_Video error, video lag/stop LCD-TV Version checking method


1. Checking method for remote controller for adjustment

Version

Press the IN-START with the remote controller for adjustment

2013. 02.15 A6



A. Video error _Vertical/Horizontal bar, residual image, light spot LCD TV connection diagram (1)


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

2013. 02.15 A7



A. Video error_Color error Check and replace Link Cable(LVDS) and contact condition

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


2013. 02.15 A8/A9


Error symptom

A. Video error_Color error

Content



2013. 02.15 A10

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!)

Appendix : Exchange T-Con Board (1)

Solder defect, CNT Broken




T-Con T-Con Defect, Defect, CNT CNT Broken Broken Solder defect, CNT Broken T-Con Defect, CNT Broken

Abnormal Power Section

Solder defect, Short/Crack



Appendix : Exchange T-Con Board (2)



GRADATION



Fuse Open, Abnormal power section

Abnormal Display

Noise

GRADATION

Appendix : Exchange PSU(LED driver)

No Light

Dim Light

No picture/Sound Ok

Dim Light

Dim Light

Appendix : Exchange the Module (1)

Panel Mura, Light leakage

Crosstalk

Panel Mura, Light leakage

Press damage

Press damage

Crosstalk

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

Press damage

Appendix : Exchange the Module (2)

Vertical Block Source TAB IC Defect

Horizontal Block Gate TAB IC Defect

Vertical Line Source TAB IC Defect

Horizontal Block Gate TAB IC Defect Gate TAB IC Defect

Vertical Block Source TAB IC Defect

Horizontal line Gate TAB IC Defect Gate TAB IC Defect

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

Horizontal Block Gate TAB IC Defect Gate TAB IC Defect


Error symptom

B. Power error _No power

Content

Check front display LED


2013. 02.15

ST-BY condition: Red

A11



B. Power error _No power Check power input voltage and ST-BY 3.5V


2013. 02.15


A12



B. Power error _No power Checking method when power is ON


2013. 02.15


A13



B. Power error _Off when on, off whiling viewing POWER OFF MODE checking method


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

2013. 02. 15 A14

Standard Repair Process Detail Technical Manual Error symptom

LCD TV

Content

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

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


2013. 02.15 A15


Error symptom

C. Audio error_No audio/Normal video

Content

Voltage and speaker checking method when there is no audio


2013. 02. 15. A16

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

② ② ①

③

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.

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

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