24LB450.pdf

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LED TV SERVICE MANUAL CHASSIS : LW45A

MODEL : 24LB45*A

24LB45*A-T*

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

P/NO : MFL68122002 (1402-REV00)

Printed in Korea

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 ................................................. ................................................................ ............... 8 TROUBLE SHOOTING GUIDE .................. ..................................... ....................................... .......................... ...... 12 BLOCK DIAGRAM................... DIAGRAM ...................................... ...................................... ....................................... ......................... ..... 24 EXPLODED EXPLODE D VIEW ................... ...................................... ...................................... ....................................... ......................... ..... 25 SCHEMATIC SCHEMA TIC CIRCUIT DIAGRAM .................. ...................................... ....................................... ........................ .....

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

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LGE Internal Use Only

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 ................................................. ................................................................ ............... 8 TROUBLE SHOOTING GUIDE .................. ..................................... ....................................... .......................... ...... 12 BLOCK DIAGRAM................... DIAGRAM ...................................... ...................................... ....................................... ......................... ..... 24 EXPLODED EXPLODE D VIEW ................... ...................................... ...................................... ....................................... ......................... ..... 25 SCHEMATIC SCHEMA TIC CIRCUIT DIAGRAM .................. ...................................... ....................................... ........................ .....


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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 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 abno rmali ty exist s that must be corr ected befo re the receiver is returned to the customer.


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SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this service manual and its supplements and addenda, read and follow the SAFETY PRECAUTIONS on page 3 of this publication. NOTE : If unforeseen circumstances create conict between the following servicing precautions and any of the safety precautions on page 3 of this publication, always follow the safety precautions. Remember: Safety First. General Servicing Precautions 1. Always unplug the receiver AC power cord from the AC power source before; a. Removing or reinstalling any component, circuit board module or any other receiver assembly. b. Disconnecting or reconnecting any receiver electrical plug or other electrical connection. c. Connecting a test substitute in parallel with an electrolytic capacitor in the receiver. CAUTION: A wrong part substitution or incorrect polarity installation of electrolytic capacitors may result in an explosion hazard. 2. Test high voltage only by measuring it with an appropriate high voltage meter or other voltage measuring device (DVM, FETVOM, etc) equipped with a suitable high voltage probe. Do not test high voltage by "drawing an arc". 3. Do not spray chemicals on or near this receiver or any of its assemblies. 4. Unless specied otherwise in this service manual, clean electrical contacts only by applying the following mixture to the contacts with a pipe cleaner, cotton-tipped stick or comparable non-abrasive applicator; 10 % (by volume) Acetone and 90 % (by volume) isopropyl alcohol (90 % - 99 % strength) CAUTION: This is a ammable mixture. Unless specied otherwise in this service manual, lubrication of contacts in not required. 5. Do not defeat any plug/socket B+ voltage interlocks with which receivers covered by this service manual might be equipped. 6. Do not apply AC power to this instrument and/or any of its electrical assemblies unless all solid-state device heat sinks are correctly installed. 7. Always connect the test receiver ground lead to the receiver chassis ground before connecting the test receiver positive lead. Always remove the test receiver ground lead last. 8. Use with this receiver only the test xtures specied in this service manual. CAUTION: Do not connect the test xture ground strap to any heat sink in this receiver. Electrostatically Sensitive (ES) Devices Some semiconductor (solid-state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some eld-effect transistors and semiconductor “chip” components. The following techniques should be used to help reduce the incidence of component damage caused by static by static electricity. 1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed to prevent potential shock reasons prior to applying power to the unit under test.


2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly. 3. Use only a grounded-tip soldering iron to solder or unsolder ES devices. 4. Use only an anti-static type solder removal device. Some 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 circuit, and observe all other safety precautions. 8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted oor can generate static electricity sufcient to damage an ES device.) General Soldering Guidelines 1. Use a grounded-tip, low-wattage soldering iron and appropriate tip size and shape that will maintain tip temperature within the range or 500 ° F to 600 °F. 2. Use an appropriate gauge of RMA resin-core solder composed of 60 parts tin/40 parts lead. 3. Keep the soldering iron tip clean and well tinned. 4. Thoroughly clean the surfaces to be soldered. Use a mall wirebristle (0.5 inch, or 1.25 cm) brush with a metal handle. Do not use freon-propelled spray-on cleaners. 5. Use the following unsoldering technique a. Allow the soldering iron tip to reach normal temperature. (500 °F to 600 °F) b. Heat the component lead until the solder melts. c. Quickly draw the melted solder with an anti-static, suctiontype solder removal device or with solder braid. CAUTION: Work quickly to avoid overheating the circuit board printed foil. 6. Use the following soldering technique. a. Allow the soldering iron tip to reach a normal temperature (500 °F to 600 °F) b. First, hold the soldering iron tip and solder the strand against the component lead until the solder melts. c. Quickly move the soldering iron tip to the junction of the component lead and the printed circuit foil, and hold it there only until the solder ows onto and around both the component lead and the foil. CAUTION: Work quickly to avoid overheating the circuit board printed foil. d. Closely inspect the solder area and remove any excess or splashed solder with a small wire-bristle brush.

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IC Remove/Replacement Some chassis circuit boards have slotted holes (oblong) through which the IC leads are inserted and then bent at against the circuit foil. When holes are the slotted type, the following technique should be used to remove and replace the IC. When working with boards using the familiar round hole, use the standard technique as outlined in paragraphs 5 and 6 above. Removal 1. Desolder and straighten each IC lead in one operation by gently prying up on the lead with the soldering iron tip as the solder melts. 2. Draw away the melted solder with an anti-static suction-type solder removal device (or with solder braid) before removing the IC. Replacement 1. Carefully insert the replacement IC in the circuit board. 2. Carefully bend each IC lead against the circuit foil pad and solder it. 3. Clean the soldered areas with a small wire-bristle brush. (It is not necessary to reapply acrylic coating to the areas).

"Small-Signal" Discrete Transistor Removal/Replacement 1. Remove the defective transistor by clipping its leads as close as possible to the component body. 2. Bend into a "U" shape the end of each of three leads remaining on the circuit board. 3. Bend into a "U" shape the replacement transistor leads. 4. Connect the replacement transistor leads to the corresponding leads extending from the circuit board and crimp the "U" with long nose pliers to insure metal to metal contact then solder each connection. Power Output, Transistor Device Removal/Replacement 1. Heat and remove all solder from around the transistor leads. 2. Remove the heat sink mounting screw (if so equipped). 3. Carefully remove the transistor from the heat sink of the circuit board. 4. Insert new transistor in the circuit board. 5. Solder each transistor lead, and clip off excess lead. 6. Replace heat sink. Diode Removal/Replacement 1. Remove defective diode by clipping its leads as close as possible to diode body. 2. Bend the two remaining leads perpendicular y to the circuit board. 3. Observing diode polarity, wrap each lead of the new diode around the corresponding lead on the circuit board. 4. Securely crimp each connection and solder it. 5. Inspect (on the circuit board copper side) the solder joints of the two "original" leads. If they are not shiny, reheat them and if necessary, apply additional solder.

3. Solder the connections. CAUTION: Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures. Circuit Board Foil Repair Excessive heat applied to the copper foil of any printed circuit board will weaken the adhesive that bonds the foil to the circuit board causing the foil to separate from or "lift-off" the board. The following guidelines and procedures should be followed whenever this condition is encountered. At IC Connections To repair a defective copper pattern at IC connections use the following procedure to install a jumper wire on the copper pattern side of the circuit board. (Use this technique only on IC connections).

1. Carefully remove the damaged copper pattern with a sharp knife. (Remove only as much copper as absolutely necessary). 2. carefully scratch away the solder resist and acrylic coating (if used) from the end of the remaining copper pattern. 3. Bend a small "U" in one end of a small gauge jumper wire and carefully crimp it around the IC pin. Solder the IC connection. 4. Route the jumper wire along the path of the out-away copper pattern and let it overlap the previously scraped end of the good copper pattern. Solder the overlapped area and clip off any excess jumper wire. At Other Connections Use the following technique to repair the defective copper pattern at connections other than IC Pins. This technique involves the installation of a jumper wire on the component side of the circuit board.

1. Remove the defective copper pattern with a sharp knife. Remove at least 1/4 inch of copper, to ensure that a hazardous condition will not exist if the jumper wire opens. 2. Trace along the copper pattern from both sides of the pattern break and locate the nearest component that is directly connected to the affected copper pattern. 3. Connect insulated 20-gauge jumper wire from the lead of the nearest component on one side of the pattern break to the lead of the nearest component on the other side. Carefully crimp and solder the connections. CAUTION: Be sure the insulated jumper wire is dressed so the it does not touch components or sharp edges.

Fuse and Conventional Resistor Removal/Replacement 1. Clip each fuse or resistor lead at top of the circuit board hollow stake. 2. Securely crimp the leads of replacement component around notch at stake top.


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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 LW45A 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 No.

Item

Specication

1.

Market

NON EU

2.

Broadcasting system

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

BAND 3.

Channel Storage

PAL(BG,I)

Remarks

NTSC(M)

China(DK)

VHF/UHF

01-C69

2~78

C1~C69

Cable

S1~S47

1~71

S1~S47

4.

Receiving system

Upper Heterodyne

5.

Video Input

PAL, SECAM, NTSC

Rear (1EA)

6.

Component Input

Y/Cb/Cr, Y/Pb/Pr

Rear(1EA) - LB450/2A Only

7.

USB Input

MP3, JPEG, Movie

Side(1EA)

8.

AV Audio Output

RF/AV/HDMI Audio Output

Rear (1EA)

9.

D-sub Input

RGB (PC)

Rear(1EA) - LB451/3/4/7A & LB515A

Service Only

Rear(1EA) - LB450/2A

9.

HDMI Input

HDMI-DTV

Rear (1EA)

Audio Input (1EA)

AV

L/R Input(1EA)

10.

5. RGB-PC Input No.

Resolution

H-freq(kHz)

V-freq(Hz)

Pixel clock(MHz)

1.

640*480

31.469

59.94

25.175

2.

800*600

37.879

60.317

40.0

3.

1024*768

48.363

60.0

65.0

4.

1280*720

47.77

59.85

74.5

5.

1152*864

54.34

60.05

80

6.

1366*768

47.71

59.79

85.5

* Monitor Range Limits Min Vertical Freq - 56 Hz/ Max Vertical Freq - 61 Hz Min Horiz. Freq - 30 kHz/ Max Horiz. Freq - 69 kHz Pixel Clock - 90 MHz


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6. 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

7. HDMI Input(DTV) No.

Resolution

H-freq(kHz)

V-freq.(kHz)

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

31.47

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

67.432

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


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Remarks Spec. out but display.


ADJUSTMENT INSTRUCTION 1. Application Range

3.2. EDID Download 3.2.1. Overview

This specification sheet is applied to all of the LED TV with LW45A chassis.

- 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”.

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.

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

3.2.3. Download method - The EDID data is automatically saved.

3.2.4. EDID DATA ** RGB : 128Bytes 0 1 2 0 00 FF FF 10 01 17 01 20 0F 47 4A 30 81 C0 01 40 33 00 3F 50 45 09 00 60 44 20 48 70 00 0A 20

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) Item

ADC adjust

ADC Adjust

CMD 1 CMD 2 Data 0 A

A

0

0

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

A

D

1

0

Automatically adjustment (The use of a internal pattern)

Adjust Sequence ▪aa 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


0 10 20 30

0 00 01 0F 90

40 50 60 70

33 00 58 2C 3D 1E 00 32

80 02 90 1F A0 00 B0 00 C0 25 D0 00 E0 2C F0 40

3.1. ADC Calibration

NO

5 6 7 8 9 FF FF 00 1E 6D 34 1D 78 EA 53 00 01 40 45 40 01 66 21 56 AA 00 00 1E 00 00 20 20 20 20 20 4C 47 20 54 56 20 20 20 20 20

A C8 4D 61 51 00 00 0A 20

B C D E F 59 01 01 01 01 A3 56 4F 9E 26 40 71 40 81 00 00 1E 30 46 8F FD 00 38 3D 1E 00 00 FC 00 32 20 00 00 00 FF 20 20 20 00 67

** HDMI 1 : 256Bytes

* 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.

Enter Adjust Adjust MODE ‘Mode In’

3 4 FF FF 03 68 A1 08 01 01 43 21 0A 20 44 20 20 20

1 FF 17 47 40

03 07 02 00 21 09 25 10

2 3 FF FF 01 03 4A 21 95 00

4 5 6 7 8 FF FF FF 00 1E 80 34 1D 78 EA 08 00 81 80 81 A9 C0 66 21 56

9 6D 53 C0 AA

A B CA 59 4D A3 71 40 51 00

C 01 56 B3 1E

09 45 45 44

25 00 0F 20

21 09 00 48

00 25 0A 44

00 21 20 20

3A 1E 20 20

80 00 20 54

71 38 2D 40 00 FD 00 38 00 00 00 FC 0A 20 01 30

21 16 3A 1A 00 25 80 2C

F1 01 80 01 00 21 09 45

4F 26 18 1D 9E 00 25 20

84 11 71 80 01 00 21 09

05 03 02 20 07 50 09 7F 38 2D 40 58 18 71 1C 16 1D 00 72 51 1E 01 1D 80 00 00 9E 02 25 21 00 00

1A 00 20 4C

02 00 20 47

18 00 20 56

22 10 07 65 2C 45 20 58 D0 1E D0 72 3A 80 1E 00

D 01 4F 00 30

11 13 03 0C 00 09 2C 25 20 6E 1C 16 D0 72 00 00

E 01 9E 81 46

12 00 25 00 28 20 38 00

F 01 26 40 8F

14 10 21 09 55 10 2D 6F

4. White Balance Adjustment 4.1. Overview 4.1.1. 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

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4.1.2. 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.

4.2. 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 Remte control (4) Video Signal Generator MSPG-925F 720p/204-Gray (Model: 217, Pattern: 49) * Color Analyzer Matrix should be calibrated using CS-1000.

4.5. Adjustment method 4.5.1. 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.

4.5.2. LED White balance table - If Model is Polaris Model, G-gain fix is applied. (1) Cool 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, 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). 3) Adjustment mode : mode - Cool

4.3. Equipment connection Color Analyzer

(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, Fix the one of R/G/B gain to 192 (default data) and decrease the others. 3) Adjustment mode : Two modes - Medium / Warm

RS-232C

Probe

Computer RS-232C

RS-232C

Pattern Generator Signal Source * If TV internal pattern is used, not needed

4.4. Adjustment Command (Protocol) (1) RS-232C Command used during auto-adj. RS-232C COMMAND CMD

DATA

ID

wb

00

00

wb

00

ff

4.6. 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 temperature and coordinate.

Explanation Begin White Balance adjustment

End White Balance adjustment (internal pattern disappears )

(2) Adjustment Map Adj. item

Cool

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

Command (lower caseASCII)

Data Range (Hex.)

CMD1

MAX C0 C0 C0

CMD2

j j j

g h i

MIN 00 00 00

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)

Mode

Color Temp

Color coordinate

Remark

Cool (C50)

13,000 K

x = 0.276 (±0.03) y = 0.279 (±0.03)

Medium (0)

9,300 K

x = 0.290 (±0.03) y = 0.298 (±0.03)

Warm (W50)

6,500 K

x = 0.318 (±0.03) y = 0.334 (±0.03)

* Test signal - Inner pattern for W/B adjust - External white pattern (85IRE, 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.

R Cut G Cut


-9-


5. Tool Option setting & Inspection per countries

9. USB S/W Download

(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.

* optional, Service only (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”.

6. 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.

7. AUDIO output check 7.1. 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) (4) Updating is starting.

7.2. Specification Item Audio practical max Output, L/R (Distortion=10% max Output)

Min

Typ

Max

Unit

Remark

4.5

5.0

6.0

W Vrms

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

8. GND and HI-POT Test 8.1. GND & HI-POT auto-check preparation (1) Check the POWER CABLE and SIGNAL CABE insertion condition

8.2. 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.

(5) Updating Completed, The TV will restart automatically. (6) If your TV is turned on, check your updated version and Tool option. * If downloading version is more 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.)

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

- 10 -


10. Optional adjustments 10.1. Manual ADC Calibration ■ Enter ‘EZ ADJUST’ mode by pressing ‘ADJ’ key. ■ Enter Internal ADC calibration mode by pressing ‘’ or ‘OK’ key at ‘7. ADC Calibration’ ADC Calibration

EZ ADJUST 0. Tool Option1

NG

ADC Comp 480i

1. Tool Option2 2. Tool Option3 3. Tool Option4 4. Tool Option5

ADC Comp 1080p

NG

ADC RGB

NG

Start

5. Country Group

Reset

6. Area Option 7. ADC Calibration

►

8. White Balance 9. 10 Point WB 10. Test Pattern 11. EDID D/L 12. Sub B/C 13. Touch Sensitivity Setting 14. Ext. Input Adjust

► Caution : Using ‘P-ONLY’ key of the Factory Service remote control when turns TV on.

10.2. Manual White balance Adjustment 10.2.1. Adjustment 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.

10.2.2. 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)

10.2.3. 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. WhiteBalance 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.


- 11 -


TROUBLE SHOOTING 1. NO POWER-Main PCBA NO POWER

1

Is Adapter Output VOLTAGE 19.4V through of J K700?

NO

check open or s hort at Line. or change Adapt er.

YES 2 Is 3.3V at C708?

check the Lines of IC701, If there is any p roblem at Line, Change IC701

NO

YES 3 Is 1.8V at C745? is 1.25V at C742?

check the Lines of IC711,IC704 If there is any p roblem at Line, Change IC704,IC706.

NO

YES 4 Check wavefo rm of X501

Check Line short or open between IC501 and X501, Change IC501 or change X501

NO

YES 5

is 3.3V at 1pin of P120? when push power key, Is 0v at 2pin o f P120?

NO

Change co ntrol Or check Line short or open of P120

NO

change IR board Or check Line short or open of P120

YES 6 is there any waver at 11pin of P120, when use remote controller?

4

Insert F/W

X501


- 12 -


2. No raster (Power LED blue, black screen) NO RASTER (Screen is not disp layed)

1

Is 19.4V at JK700?

NO

check open or s hort at Line. or change Adapter

NO

Check Line short or open between IC711/IC704 and IC501, If there is any p roblem at Line, Change IC711/IC704 or chang e IC501

YES 2

Is 1.25V at 4pin of IC704? Is 1.8V at 2pin of IC711? YES

3

NO is 3V at 1pin of IC601? YES

4 Put into LVDS cable co mpletely? LVDS cable have damage?

5

NO

YES NO is 12V at 1pin o f P 101? YES

It is not o ver 3V at 1pin o f IC601. Change Q601. Or check Line short o r open between R603 and 95pin of IC501. Change IC 501. If LVDS c able isn’t insulted enough, Insult LVDS cable until lo cking hook. If LVDS cab le have damage, Change LVDS c able If is no t under 1.5V at R722, change Q721 o r check op en and short of Line among Q720 and Q721. If is under 11V at L110, Check o pen and short Of line between L110 and P101.

Insert the F/W back or REPLACE LCD MODULE


- 13 -


3. Abnormal/No screen (All input)-Main PCBA Ab normal/No s creen (all input)

1 Put into LVDS cable co mpletely? LVDS cable have damage?

NO

YES 2 Is 12V at 1pin of P101?

NO

YES

3

Check wavefo rm at signal line of P101 (Clock:9,10 Data: 6,7,12,13,15,16,18,19)

NO

If LVDS cab le isn’t insulted enough, Insult LVDS cable until locking hoo k. If LVDS cable have damage, Change LVDS c able

If is not under 1.5V at R722, change Q721 o r check op en and short of Line among Q720 and Q721. If is under 11V at L110, Check op en and sho rt Of line between L110 and P101.

Check op en and sho rt Of line between Q720 and P101. Or Check LVDS cable have damage. Another is change IC501.

YES Change mo dule

WAVEFORMS

3

9,10Pin of P101 (Clock line)


6,7,12,13,15,16,18,19 Pin of 1201 (Data Line)

- 14 -


4. Abnormal screen (TV)-Main PCBA Ab normal screen (TV)

1

insult RF cable tight and then Cable nut screw t ight.

NO

Put into RF cable completely? YES

2

If 1.7V is not at p lus pin of TU401, check It is over 3V at 2pin o f IC711, if it is not, Check Line between TU401 and IC711 is op en or short. Anot her is change IC711 or TU401

NO

Is 1.8V at 7pin of TU401?

3

Is I2C waveform At 3,4pin of TU401?

NO

Check Line between TU401 and IC501 is open or short, Another is change IC501 or TU401

4

Is IF wavef orm at 43 ,44 pin of IC501?

NO


Change Main PCBA

WAVEFORMS

3

4

3Pin of TU401 (SCL)

4Pin of TU401 (SDA)


- 15 -

43,44pin o f IC501


5. Abnormal screen (AV)-Main PCBA Abnormal screen (AV)

1

NO

Put into AV cable completely?

Insult AV c able tight

YES 2

Is Input signal timing and f ormat in spec?

NO

Change Timing to 480I, 576I Or change f ormat CVBS

YES 3

Is waveform at R505

Check Line between JK101 and IC501 is open or short, Another is change AV cable

NO

YES Change IC501

WAVEFORMS

3

R505 (CVBS)


- 16 -


6. Abnormal screen (RGB PC)-Main PCBA Ab normal screen (RGB PC)

1

NO

Put into RGB cable co mpletely?

insult RGB c able tight

YES 2

NO


Change Timing accord ing to prod uct spec, Or change fo rmat to RGB

YES 3

Is waveform at R501 R502, R504

Check Line between JK201 and IC501 is open or short, Another is Change RGB cable

NO

YES Change IC501

WAVEFORMS

3

R502(G)


R604(R)

- 17 -

R601(B)


7. Abnormal screen (COMPONENT)-Main PCBA Abnormal screen (COMPONENT)

1

NO

Put into Component cable completely?

insult COMPONENT c able tig ht

YES 2

NO


Change Timing according to product spec, Or change f ormat to Component

YES 3

Is waveform at R501 R502, R504

Check Line between JK102 and IC501 is open or short, Another is Change COMPONENT cable

NO

YES Change IC501

WAVEFORMS

3

R502(G)


R604(R)

- 18 -

R601(B)


8. Abnormal screen (HDMI)-Main PCBA Abnormal screen (HDMI)

1

NO

Put into HDMI cable completely?

insulted HDMI cable

YES 2

Change Timing according to product sp ec, change f ormat under 8 bit in Ycb cr, Ypbp r, RGB

NO

Is Input signal timing and fo rmat in spec? YES

3

Check Line b etween JK 203 and IC501 is open or short, Another is Change HDMI cable

Can read EDID and HDCP key though 16,15pin of JK203 YES

Check Line b etween JK203 and IC501 is open or short, Another is Change IC501 or HDMI cable

4 Is 5V at 19pin o f J K203?

YES 5

Is wavef orm at 10,12pin of JK203?

Check Line b etween JK203 and IC501 is open or short, Another is Change HDMI cable

NO

YES 6

Is wavef orm at 1,3,4,6,7,9pin Of J K203?

Check Line b etween JK 203 and IC501 is open or short, Another is Change HDMI cable

NO

YES Change IC501


- 19 -


9. No sound (all source )-Main PCBA NO so und (All source) 1 NO

Does wire connect P301 with speaker? YES 2

If 8V is not plus at L703, check of JK700 is open. If is not Check Line between L703 and IC301 is op en or short. .Another is change IC301

NO

Is 19.4V at 19,20,31,32pin of IC301 ?

Connect wire between P301 and speaker.

YES 3 Is 3.3V at 40pin of IC301?

If 3V is not p lus 30pin of IC301, check It is over 3V at L301 if it is not, Check Line between L301 and IC301 is op en or short. Anot her is change IC701,IC301

NO

YES 4

Check Line between IC301 and IC501 is open or short, Another is change IC301 or IC501.

NO

Is I2C waveform at 10,11pin of IC301? YES 5

6

Check Line between IC301 and IC501 is open or short, Another is change IC301 or IC501.

NO

Is I2S wavefo rm at R301,R302,R303,R304?

Check Line between IC301 and P301 is op en or short. And then check resistance of speaker is under 4ohm. Anot her is change IC301

NO Is there any waveform P301? YES Change speaker and wire

4

5

10pin of IC301

R301(SDO)

11pin of IC301

R303(SCK)

6

5

R304(MCLK) Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes

R302(WS)

- 20 -

1pin of P301(Audio o ut) LGE Internal Use Only

10. Abnormal sound (TV)-Main PCBA Abnormal sound (TV)

1

insult RF cable tight and then Cable nut screw t ight.

NO

Put into RF cable completely? YES

2

If 1.7V is not at plus p in of TU401, check It is o ver 3V at 2pin o f IC711, if it is no t, Check Line b etween TU401 and IC711 is op en or short. Another is change IC401 or TU401

NO

Is 1.8V at 7pin of TU401?

3

Is I2C waveform At 3,4pin of TU401?

NO


4

Is IF waveform at 43, 44 pin of IC501?

NO


Change Main PCBA

WAVEFORMS

3

4

3Pin of TU401 (SCL)

4Pin of TU401 (SDA)


- 21 -

43,44pin o f IC501


11. Abnormal sound (AV)-Main PCBA Ab normal sound (AV)

1

NO

Put into AV cable completely?

Insult AV c able tight

YES

2

Is wavef orm at C520,C521

Check Line between JK101 and IC501 is open or short, Another is change AV cable

NO

YES Change IC501

WAVEFORMS

2

C520,C521(audio in)


- 22 -


12. Abnormal sound (HDMI)-Main PCBA Ab normal sound (HDMI)

1

NO

Put into HDMI cable completely?

insulted HDMI cable

YES 2

Change Timing accord ing to product sp ec, change f ormat under 8 bit in Yc bcr, Ypb pr, RGB

NO

Is Input signal timing and fo rmat in spec? YES

3

Check Line between JK203 and IC501 is open or short, Another is Change HDMI cable

Can read EDID and HDCP key though 16,15pin of JK203 YES

Check Line between JK203 and IC501 is open or short, Another is Change IC501 o r HDMI cable

4 Is 5V at 19pin o f J K203?

YES 5

Is wavef orm at 10,12pin of JK203?


NO

YES 6

Is wavefo rm at 1,3,4,6,7,9pin Of JK 203?


NO

YES Change IC501


- 23 -


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 1 9

0 0 4

1 2 5

0 2 1

0 4 5

1 V L

0 0 9

n o 0 i t p 0 8 O

1 0 8

0 0 2

0 1 5

1 0 3

0 0 3


1 3 A

2 A

- 25 -


EAX65643103 44A/45A/450A SW_RESET

R 31 0

1 00

C320 1000pF 50V

I2S_MCLK R 30 4

1 00

9 1 3 C

1 1 3 R

C321 10uF 10V

To improve CST issue.(X5R -> X7R) EAE31360401->EAE52158501 2013.11.27

D N O O G I I I ] _ _ _ P D D K E D N L D [ V G C A

+19V

V 0 5

K 7 . 4

+3.3V_M

F p 0 0 0 2 2

TAIYO YUDEN C318 0.1uF 25V

T E S E R

A 1 T S B

A 1 D N G P

A 1 T U O

A 1 D D V P

READY C348 10uF 25V

C317 10uF 25V

L303-*1 10.0uH

B 1 D D V P

R313 12

ABCO

R314 12

C301 1uF 10V

C303 1uF 10V

R 30 1

I2S_SDO

I2S_WS I2S_SCK AUAMP_SDA AUAMP_SCL

R308 4.7K +3.3V_M

R309 4.7K

R 30 5

1 00

R 30 6

1 00

20130914 cjlim READY -> APPLY

1

VDD_PLL

2

NC_2

3

THERMAL 41

4 5

IC301

DVDD

6

NTP7514

7

R 30 2

1 00

WCK

R 30 3

1 00

BCK

9

SDA

10

C331 0.1uF 50V

R323

4.7K

4.7K SPK_L-

TAIYO YUDEN L304-*1 10.0uH

26 NC_4 25 AGND

JP304 SPK_L+

SPK_L+ C314 1uF 10V

24 VDR2 23 BST2A

0x54

8

R316 12

C315 22000pF 50V

28 BST1B 27 VDR1

GND NC_3 SDATA

1 00

R315 12

R322

SPEAKER_L

L304 10uH

30 OUT1B 29 PGND1B

C330 0.1uF 50V C329 0.47uF 50V

ABCO

C326 390pF 50V

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

NC_1

SPK_L+

L303 10uH

C325 390pF 50V

C312 1uF 10V

22 PGND2A 21 OUT2A

JP303

JP302

JP301

1 .

SMAW250-H04R

P301 TAIYO YUDEN

C306 33pF 50V

L T 0 C L _ S U R A O F T I N O M

1 _ R O T I N O M

2 _ R O T I N O M

B 2 T S B

C308 22000pF 50V

B 2 D N G P

B 2 T U O

B 2 D D V P

A 2 D D V P

2

SPK_R-

SPK_R-

1 2 3 4 5 6 7 8 9 0 1 1 1 1 1 1 1 1 1 2 C305 33pF 50V

3

SPK_R+

SPK_R+

C311 22000pF 50V

4

SPK_L-

SPK_L-

L305-*1 10.0uH

+19V R317 12

C309 0.1uF 25V

C310 10uF 25V

READY C349 10uF 25V

R318 12

SPK_R+

ABCO L305 10uH

C334 0.1uF 50V

C327 390pF 50V

SPEAKER_R

C333 0.47uF 50V

C328 390pF 50V R319 12

R324 4.7K

C335 0.1uF 50V

ABCO L306 10uH

R320 12

R325 4.7K

SPK_RTAIYO YUDEN L306-*1 10.0uH

POWER_DET

AUDIO_OUT AMP : GAIN X 4 IC341 AS324MTR-E1

+18V

C341 0.1uF 25V C

B

Q341 MMBT3904(NXP) R 34 2

1 OUT1

1K

E C342 0.0068uF 50V

MNT_LOUT R341 4.7K

R343

C343

OUT4 14

10K

33pF50V

2 I NP UT 1-

INPUT4- 13

3 I NP UT 1+

INPUT4+ 12

R344 6.8K

MNT_L_AMP

R 34 5

5 .6 K

+18V

4 VCC C344 0.1uF 25V

GND 11

EAX65643103 44A/45A/450A SW_RESET

R 31 0

1 00

C320 1000pF 50V

I2S_MCLK R 30 4

1 00

D N G ] P E [

To improve CST issue.(X5R -> X7R) EAE31360401->EAE52158501 2013.11.27

F p 0 0 0 2 2

9 1 3 C

1 1 3 R

C321 10uF 10V

+19V

V 0 5

K 7 . 4

+3.3V_M

TAIYO YUDEN C318 0.1uF 25V

O I _ D D V

O I _ D N G

I T _ E K S L D E C A R

A 1 T S B

A 1 D N G P

A 1 T U O

A 1 D D V P

READY C348 10uF 25V

C317 10uF 25V

L303-*1 10.0uH

B 1 D D V P

R313 12

ABCO

R314 12

NC_1

1 2

NC_2

3

GND

4

NC_3

5

IC301

DVDD

6

NTP7514

C301 1uF 10V

C303 1uF 10V

R 30 1

I2S_SDO

R 30 2

I2S_WS

R 30 3

I2S_SCK AUAMP_SDA AUAMP_SCL

R308 4.7K

R 30 5

1 00

R 30 6

1 00

20130914 cjlim READY -> APPLY

R309 4.7K

+3.3V_M

SDATA

1 00

30 OUT1B 29 PGND1B

THERMAL 41

7

WCK

1 00

BCK

9

SDA

10

8

C331 0.1uF 50V

R323

4.7K

4.7K SPK_L-

TAIYO YUDEN L304-*1 10.0uH

C315 22000pF 50V

28 BST1B 27 VDR1 26 NC_4 25 AGND

JP304 SPK_L+

SPK_L+ C314 1uF 10V

24 VDR2 23 BST2A

0x54

1 00

R316 12

R322

SPEAKER_L

L304 10uH R315 12

C330 0.1uF 50V C329 0.47uF 50V

ABCO

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

SPK_L+

L303 10uH

C325 390pF 50V

C312 1uF 10V

22 PGND2A 21 OUT2A

JP303

JP302

JP301

2

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 C305 33pF 50V

3

SPK_R+

SPK_R+

C311 22000pF 50V

4

SPK_L-

SPK_L-

SMAW250-H04R

P301 TAIYO YUDEN

C306 33pF 50V

L T 0 C L _ S U R A O F T I N O M

1 _ R O T I N O M

2 _ R O T I N O M

B 2 T S B

B 2 D N G P

B 2 T U O

B 2 D D V P

A 2 D D V P

L305-*1 10.0uH

+19V R318 12

R317 12

C309 0.1uF 25V

C310 10uF 25V

READY C349 10uF 25V

SPK_R+

ABCO L305 10uH

C334 0.1uF 50V

C327 390pF 50V

R319 12

50V

SPEAKER_R

C333 0.47uF 50V

C328 390pF 50V

C308 22000pF

R324 4.7K

C335 0.1uF 50V

ABCO L306 10uH

R320 12

R325 4.7K

SPK_RTAIYO YUDEN L306-*1 10.0uH

POWER_DET

AUDIO_OUT AMP : GAIN X 4 IC341 AS324MTR-E1

+18V

C341 0.1uF 25V C

B

Q341 MMBT3904(NXP) R 34 2

1 OUT1

1K

E C342 0.0068uF 50V

MNT_LOUT

R343

R341 4.7K

C343

OUT4 14

10K

33pF50V

2 I NP UT 1-

INPUT4- 13

3 I NP UT 1+

INPUT4+ 12

R344 6.8K

R 34 5

MNT_L_AMP

5 .6 K

+18V

4 VCC

GND 11

C344 0.1uF 25V

R 34 6

MNT_R_AMP

5 .6 K

5 I NP UT 2+

INPUT3+ 10

6 I NP UT 2-

INPUT3- 9

C345 33pF 50V

+18V

R347

10K R350 6.8K

C346 0.1uF 25V C

Q342 MMBT3904(NXP) R349 B

7 OUT2

1K

E

MNT_ROUT

OUT3 8

C347 0.0068uF 50V

R348 4.7K

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.

44A/45A/450A AUDIO

2013/08/21 3

8

AUDIO

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


TBD 44A/45A/450A

NTSC

IF

TU402 TDSS-H701F

+1.8V_M READY

L402 BLM18PG121SN1D NTSC

1 2 3 4 5 6 7 8 9 10 11

NC_1

C408 0.1uF 16V

NTSC C409 10uF 10V

MULTI_TUNER

B1

A1

+3.3V_M

TDJH-G101D

C405 0.1uF 16V

SD A

1

+B1[3.3V]

2 3

NC_3 4

NC_4

5

NC_5

6 7

IF_AGC

8

DIF[P] 9

A1

B1

To set multi option for NTSC 2013.11.27 by BJ.KIM

NC_1 IF_AGC

R412

PAL 100

READY R403 100

TUNER_RESET

PAL R413 10 PAL R414 10

IF[N] NC_2

NTSC R413-*1 33

C403 20pF 50V

R 4 16

R408 1K

33

33

C406 20pF 50V READY C407 20pF 50V READY

NTSC R414-*1 33

To change the value from 0ohm to 33ohm at NTSC. 2013.11.27 by BJ.KIM

B1

SHIELD

SHIELD

Y 2 0 D 4 A E R R 0

TUNER_SCL

TUNER_SDA

IF_P IF_N

Close to the tuner

NC_3

Y D 1 A 0 E 4 R R 0

+3.3V_TU

R407 1K R 4 15 C402 20pF 50V

IF[P]

C413 1000pF 630V

READY R404 100K

READY C401 0.1uF 16V

IF_AGC

SDA

12

C411 1000pF 630V

+3.3V_TU

NTSC R412-*1 1K

C410 0.1uF should be guarded by ground 16V

SCL

47

C414 1000pF 630V

C404 22uF 6.3V

B1[+3.3V]

DIF[N]

A1

L401 BLM18PG121SN1D

Near the pin

SC L

A1

B1

+3.3V_TU

TU401

NC_2

TBD 44A/45A/450A

NTSC

IF

TU402 TDSS-H701F

+1.8V_M READY

L402 BLM18PG121SN1D NTSC

1 2 3 4 5 6 7 8 9 10 11

NC_1

C408 0.1uF 16V

NTSC C409 10uF 10V

MULTI_TUNER

NC_2

B1

A1

+3.3V_M

TDJH-G101D

C405 0.1uF 16V

SD A

1

+B1[3.3V]

2 3

NC_3 4

NC_4

5

NC_5

6 7

IF_AGC

8

DIF[P] 9

L401 BLM18PG121SN1D

Near the pin

SC L

C404 22uF 6.3V

+3.3V_TU

B1[+3.3V] To set multi option for NTSC 2013.11.27 by BJ.KIM

NC_1 IF_AGC

R412

PAL 100

C410 0.1uF should be guarded by ground 16V

SCL

READY R403 100

NTSC R412-*1 1K

READY R404 100K

TUNER_RESET

R407 1K R 4 15 C402 20pF 50V

SDA IF[P]

PAL R413 10

IF[N]

PAL R414 10

NC_2

+3.3V_TU


IF_AGC

NTSC R413-*1 33

C403 20pF 50V

R 4 16

R408 1K

33

33

C406 20pF 50V READY C407 20pF 50V READY

NTSC R414-*1 33

TUNER_SCL

TUNER_SDA

IF_P IF_N

Close to the tuner To change the value from 0ohm to 33ohm at NTSC. 2013.11.27 by BJ.KIM

NC_3

DIF[N] A1

B1

+3.3V_TU

TU401

A1

A1

B1

B1

47 SHIELD

12 SHIELD

C414 1000pF 630V


C411 1000pF 630V

C413 1000pF 630V

Y D 1 A 0 E 4

R R 0

Y 2 0 D 4 A E R R 0

44A/45A/450A TUNER

&

IR

2013/08/21 4

8

TUNER



TBD 44A/45A/450A

B S U _ V 5 +

+19V BLU_ON

R601 10K R603 10K

INV_ON

R604 1K

C B

DRIVER R605 100K 1%

1% Q601 MMBT3904(NXP)

DRIVER C606 10uF 25V

DRIVER C601 1000pF 50V

EN

OVP

1%

DRIVER R607 27K 1%


NC_1

BLU_CURRENT_CTL

READY C603 50V 100pF

1

3.3-> 5.6ohm(12.12.25) [EP]GND

24 L A M 5 R 2 E H T

2

23

3

22

4

21

D DRIVER R620 5.6

VIN

CS

PGND_2

PDIM READY R610 100K

5

20

6

19

0.1

NDRV

RSS

DRIVER R616

DRIVER R617

240K 1%

10K 1%

DRIVER DRIVER RISET

18.5_BOE R611-*3 1.8K 1% 18.5_BOE R612-*3 39K 1%

18.5_CMI FHD_22_HEESUNG/FHD_24 R611-*1 R611-*2 0 2.7K 18.5_CMI FHD_22_HEESUNG/FHD_24 R612-*1 R612-*2 39K 36K

LS8

HD_24/FHD_22 R611 680

7

18

8

17

LS7

HD_24/FHD_22 R612 20K

LS6

9

16

10

15

LS5

11

14

Add BLU Current Option

12

13

1% DRIVER

DRIVER C605

COMP

RT

R613 39K 1%

18.5_AUO R611-*4 2.7K 1% 18.5_AUO R612-*4 33K 1%

S

DRIVER C614 1uF 25V

VREF

DRIVER Q602 AOD478

G

R618 PGND_1

DRIVER R608 100 READY R609 100K

EMI Improve 0-> 3.3ohm(12.12.25)

IC601 DT1641AS

DRIVER R606 560K

PWM_DIM

100V


DRIVER

E

VOUT

DRIVER D602 BR210

DRIVER L601 33UH

BOOST R627 0

R602 3K

READY

R614

4700pF 50V DRIVER R615

1.5K 1%

1.5K 1%

LS1

DRIVER C604 0.047uF 25V

LS2

LS3

LS4

2013.01.05 NC_2

Y D A E R

JP601

JP602

0 0 6 A V Y D A E R

1 0 6 A V Y D A E R

2 0 6 A Y V D A E R

3 0 6 A V

LGND

Y D A E R

JP603

JP604

4 0 6 A V Y D A E R

5 0 6 A V Y D A E R

JP605

6 0 6 A V Y D A E R

7 0 6 A V

VOUT

JP606

2CH/4CH R621 0 READY R625 0

2CH/4CH R622 0

READY R626 0

R623 0

JP609 JP607

2CH/4CH

R624 0 2CH/4CH

JP608






TBD 44A/45A/450A

B S U _ V 5 +

+19V BLU_ON

R602 3K

READY

R601 10K R603 10K

INV_ON

R604 1K

C B

DRIVER R605 100K 1%

1% Q601 MMBT3904(NXP)



EN

1

OVP

1%

DRIVER R607 27K 1%


NC_1

READY C603 50V 100pF

L A M 5 R 2 E H T

23

3

22

4

21

5

20

6

19

D DRIVER R620 5.6

VIN

CS

PGND_2

PDIM

0.1

NDRV

RSS

DRIVER R616

DRIVER R617

240K 1%

10K 1%

18.5_BOE R611-*3 1.8K 1% 18.5_BOE R612-*3 39K 1%

18.5_CMI FHD_22_HEESUNG/FHD_24 R611-*1 R611-*2 0 2.7K 18.5_CMI FHD_22_HEESUNG/FHD_24 R612-*1 R612-*2 39K 36K

1% DRIVER

DRIVER C605

COMP DRIVER DRIVER

RISET

7

18

RT

R613

LS8

HD_24/FHD_22 R611 680

LS7

HD_24/FHD_22 R612 20K

LS6

LS5 Add BLU Current Option

8

17

9

16

10

15

11

14

12

13

DRIVER R615

R614 1.5K 1%

39K 1%

18.5_AUO R611-*4 2.7K 1% 18.5_AUO R612-*4 33K 1%

S

DRIVER C614 1uF 25V

VREF

DRIVER Q602 AOD478

G

R618

READY R610 100K

BLU_CURRENT_CTL

3.3-> 5.6ohm(12.12.25) [EP]GND

24

2

PGND_1

DRIVER R608 100 READY R609 100K

EMI Improve 0-> 3.3ohm(12.12.25)

IC601 DT1641AS

DRIVER R606 560K

PWM_DIM

100V


DRIVER

E

VOUT

DRIVER D602 BR210

DRIVER L601 33UH

BOOST R627 0

4700pF 50V

1.5K 1%

LS1

DRIVER C604 0.047uF 25V

LS2

LS3

LS4

2013.01.05 NC_2

Y D A E R

0 0 6 A V Y D A E R

1 0 6 A V Y D A E R

2 0 6 A Y V D A

LGND

3 0 6 A V

Y D A E R

E R

JP601

JP603

JP602

JP604

4 0 6 A V Y D A E R

5 0 6 A V Y D A E R

6 0 6 A V Y D A E R

JP605

7 0 6 A V

VOUT

JP606

2CH/4CH R621 0 READY R625 0

2CH/4CH R622 0

READY R626 0

JP609






JP607

R623 0 2CH/4CH

JP608

R624 0 2CH/4CH

6

5

4

7


3

2

1

L 6 0 H - C 2 R 4 0 W / 6 7 H P 0 C 5 2 2 1

2 1 3 1

1 1

0 1

9

8

7

6

5

4

3

2

1

5 0 J 2 1 H 1 - 0 H R 6 C H P 8 2 0 0 5 0

44A/45A/450A LED_Driver

2013/08/21 6

8

LED DRIVER



TBD 44A/45A/450A

22/26 P801

27.5

SM14B-SRSS-TB

+24V_BLU

P802 20022WR-14A00

JP801 24V

1

24V

2

24V

3

24V

4

24V

5

GND

6

1 +19V 2 BOOST D801 BR210

BOOST L801 10uH

BOOST C802 10uF 25V

+24V_BLU

3

100V


BOOST C804 100pF

BOOST R812 220K

BOOST R813 30K

50V BOOST IC801 TPS40210DGQR

BOOST R814 10

[EP]

BOOST C811 68uF 35V

BOOST C816 270pF 50V

BOOST C814 1uF 50V

4

READY C815 1uF 50V

5

6 GND

RC BOOST R801 10K

BOOST_EN

BOOST R802 1K

BOOST C805 0.22uF

SS

DIS/EN

FB

12.07.03 To improve backlight blinking C1103 47pF->2200pF C1105 47pF->Apply R1103 18K->470K

2

16V

COMP

12.05.17 To improve audible noise C1103 2200pF->47pF C1105 47pF->OPT

1


BOOST C807 47pF 50V

10 L A M 1 R 1 E H T

3

8

4

7

5

6

BOOST R807 51K

BOOST R805

9

7

BOOST R806 1.5K

GND

8

GND

9

GND

10

ERROR_OUT

11

8

BP

GDRV

BOOST R811 5.6

ISNS

BOOST R810 1K

GND

BOOST READY BOOST C809 C810 C808 0.1uF 100pF 1uF 25V 50V 10V

BOOST R815 1K

D G

BOOST Q801 AOD478

9

S

Y 8 D 0 1 A 8 . E R 0 R

T 9 S 0 1 O 8 . O R 0 B

JP802

READY R820 100

10

BLU_ON JP803

11 INV_ON

READY R822 4.7K

BOOST C821 0.1uF 25V

Y 1 D 2 A 8 E R 0 R

JP804

12 12

NC

13 13

PWN_DIM PWM_DIM

470K

7

VDD

14 14

READY C820 1uF 10V

15 GND

15

TBD 44A/45A/450A

22/26 P801

27.5

SM14B-SRSS-TB

+24V_BLU

P802 20022WR-14A00

JP801 24V

1

24V

2

24V

3

24V

4

24V

5

GND

6

1 +19V 2 BOOST D801 BR210

BOOST L801 10uH

BOOST C802 10uF 25V

+24V_BLU

3

100V


BOOST C804 100pF

BOOST R812 220K

BOOST R813 30K

50V BOOST IC801 TPS40210DGQR

BOOST R814 10

[EP]

BOOST C811 68uF 35V


BOOST C814 1uF 50V

4

READY C815 1uF 50V

5

6 GND

RC BOOST R801 10K

BOOST_EN

BOOST R802 1K

BOOST C805 0.22uF

SS

DIS/EN

FB

12.07.03 To improve backlight blinking C1103 47pF->2200pF C1105 47pF->Apply R1103 18K->470K

2

16V

COMP

12.05.17 To improve audible noise C1103 2200pF->47pF C1105 47pF->OPT

1


BOOST C807 47pF 50V

10 L A M 1 R 1 E H T

3

9

8

4

7

5

6

7 GND

8

GND

9

GND

10

ERROR_OUT

11

8

BP

GDRV

BOOST R811 5.6

ISNS

BOOST R810 1K

GND

BOOST R807 51K

BOOST R805

7

VDD

BOOST READY BOOST C809 C810 C808 0.1uF 100pF 1uF 25V 50V 10V

BOOST R815 1K

D G

BOOST Q801 AOD478

9

S

Y 8 D 0 1 A 8 . E R 0 R

T 9 S 0 1 O 8 . O R 0 B

READY R820 100

JP802

JP803

11 INV_ON

READY R822 4.7K

BOOST C821 0.1uF 25V

Y 1 D 2 A 8 E R 0 R

JP804

13 13 14 14

BOOST R806 1.5K


12 12

NC

PWN_DIM PWM_DIM

470K

10

BLU_ON

READY C820 1uF 10V

15

44A/45A/450A DC

BOOST

15

GND

UP

2013/08/21 8

8

BOOST-UP



24LB450.pdf

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