LG 49LF5400-SA, 49LF54**-SA Schematic

Internal Use Only

North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com

LED TV

SERVICE MANUAL

CHASSIS : LJ55H

MODEL : 49LF54** 49LF54**-SA

CAUTION

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

Printed in KoreaP/NO : MFL68606504 (1501-REV00)

CONTENTS

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

PRODUCT SAFETY ................................................................................. 3

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

ADJUSTMENT INSTRUCTION .............................................................. 10

BLOCK DIAGRAM ...................................................................................18

EXPLODED VIEW .................................................................................. 20

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

TROUBLESHOOTING ...............................................................APPENDIX

Only for training and service purposes

- 2 -

SAFETY PRECAUTIONS

IMPORTANT SAFETY NOTICE

Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the Schematic Diagram and Exploded View. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer.

General Guidance

An isolation Transformer should always be used during the servicing of a receiver whose chassis is not isolated from the AC power line. Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal injury from electrical shocks.

It will also protect the receiver and it's components from being damaged by accidental shorts of the circuitry that may be inadvertently introduced during the service operation.

If any fuse (or Fusible Resistor) in this TV receiver is blown, replace it with the specified.

When replacing a high wattage resistor (Oxide Metal Film Resistor, over 1 W), keep the resistor 10 mm away from PCB.

Keep wires away from high voltage or high temperature parts.

Before returning the receiver to the customer,

always perform an AC leakage current check on the exposed metallic parts of the cabinet, such as antennas, terminals, etc., to be sure the set is safe to operate without damage of electrical shock.

Leakage Current Cold Check(Antenna Cold Check)

With the instrument AC plug removed from AC source, connect an electrical jumper across the two AC plug prongs. Place the AC switch in the on position, connect one lead of ohm-meter to the AC plug prongs tied together and touch other ohm-meter lead in turn to each exposed metallic parts such as antenna terminals, phone jacks, etc. If the exposed metallic part has a return path to the chassis, the measured resistance should be between 1 MΩ and 5.2 MΩ. When the exposed metal has no return path to the chassis the reading must be infinite. An other abnormality exists that must be corrected before the receiver is returned to the customer.

Leakage Current Hot Check (See below Figure)

Plug the AC cord directly into the AC outlet.

Do not use a line Isolation Transformer during this check. Connect 1.5 K / 10 watt resistor in parallel with a 0.15 uF capacitor between a known good earth ground (Water Pipe, Conduit, etc.) and the exposed metallic parts. Measure the AC voltage across the resistor using AC voltmeter with 1000 ohms/volt or more sensitivity. Reverse plug the AC cord into the AC outlet and repeat AC voltage measurements for each exposed metallic part. Any voltage measured must not exceed 0.75 volt RMS which is corresponds to

0.5 mA. In case any measurement is out of the limits specified, there is possibility of shock hazard and the set must be checked and repaired before it is returned to the customer.

Leakage Current Hot Check circuit

Only for training and service purposes

- 3 -

SERVICING PRECAUTIONS

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

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

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

General Servicing Precautions

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

a. Removing or reinstalling any component, circuit board mod-

ule 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, suction-

type solder removal device or with solder braid.

CAUTION: Work quickly to avoid overheating the circuit

board printed foil.

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

(500 °F to 600 °F)

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

the component lead until the solder melts.

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

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

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

splashed solder with a small wire-bristle brush.

Only for training and service purposes

- 4 -

IC Remove/Replacement

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

Removal

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

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

Replacement

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

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

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

"Small-Signal" Discrete Transistor Removal/Replacement

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

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

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

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

Power Output, Transistor Device Removal/Replacement

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

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

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

4. Insert new transistor in the circuit board.

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

6. Replace heat sink.

Diode Removal/Replacement

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

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

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

4. Securely crimp each connection and solder it.

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

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

Circuit Board Foil Repair

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

At IC Connections

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

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

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

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

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

At Other Connections

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

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

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

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

Fuse and Conventional Resistor Removal/Replacement

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

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

Only for training and service purposes

- 5 -

SPECIFICATION

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

1. Application range

This spec sheet is applied all of the 32”, 39”, 42”, 47”, 50”, 55” LED TV with LJ55H chassis

2. Test condition

Each part is tested as below without special notice.

1) Temperature : 25 ºC ± 5 ºC, CST : 40 ºC±5 ºC

2) Relative Humidity: 65 % ± 10 %

3) Power Voltage Standard input voltage (100~240V@ 50/60Hz) * 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 20 minutes prior to

the adjustment.

3. Test method

1) Performance: LGE TV test method followed

2) Demanded other specification

- Safety : CE, IEC specification

- EMC: CE, IEC

4. General Specification

No Item Specication Measurement Result Remark

1. Receiving System 1) SBTVD / NTSC / PAL-M / PAL-N

2. Available Channel 1) VHF : 02~13

3. Input Voltage 1) AC 100 ~ 240V 50/60Hz

4. Market Central and South AMERICA

5. Screen Size 32 inch Wide (1366 × 768) 32LF550B-SD

2) UHF : 14~69

3) CATV : 01~135

32LF565B-SE 32LF620B-SD

32 inch Wide (1920 × 1080) 32LF5650-SE

39 inch Wide (1920 × 1080) 39LF5650-SE

40 inch Wide (1920 × 1080) 40LF5700-SA

42 inch Wide (1920 × 1080) 42LF6200-SD

43 inch Wide (1920 × 1080) 43LF5700-SA

43LF5400-SA

49 inch Wide (1920 × 1080) 49LF5500-SD

49LF6200-SD 49LF5400-SA

50 inch Wide (1920 × 1080) 50LF5650-SE

55 inch Wide (1920 × 1080) 55LF5650-SE

55LF5600-SA 55LF6200-SD

60 inch Wide (1920 *1080) 60LF5650-SE

43 inch UHD (3840 × 2160) 43UF6750-SJ

49 inch UHD (3840 × 2160) 49UF6750-SJ

55 inch UHD (3840 × 2160) 55UF6750-SJ/SA

Only for training and service purposes

- 6 -

No Item Specication Measurement Result Remark

6. Aspect Ratio 16:9

7. Tuning System FS

8. Module LC430EQE-FHM1 UHD, 60Hz LGD 43UF6750-SJ

HC430EQN-VAEQ1 AUO

LC490EQE-FHM1 UHD, 60Hz LGD 49UF6750-SJ

NC490EQE-VCCA1 CSOT

LC550EQE-FHM1 UHD, 60Hz LGD 55UF6750-SJ

HC550EQN-VSEQ1

LC320DXE-MGA6 HD, 60Hz LGD 32LF550B-SD

HC320DXN-VSHR4 CSOT

HC320DXN-ABHR4 BOE

NC320DXN-VSBP8 SHARP

LC490DUE-MGA6 FHD, 60Hz LGD 49LF5500-SD

LC320DXE-MGA4 HD, 60Hz LGD 32LF565B-SE

HC320DXN-VSHS4 CSOT

HC320DXN-ABHS4 BOE

NC320DXN-VSBP6 SHARP

LC320DUE-MGA4 FHD, 60Hz LGD 32LF5650-SE

NC320DUN-VBBP4 BOE

LC500DUE-MGA4 FHD, 60Hz LGD 50LF5650-SE

LC550DUE-MGA4 FHD, 60Hz CSOT 55LF5650-SE

NC550DUE-VCCP2 BOE

HC600DUF-VHHS4 FHD 120Hz SHARP 60LF5650-SE

LC430EUE-FHM1 FHD, 60Hz LGD 43LF5700-SA

LC320DXE-MGP2 FHD, 120Hz LGD 32LF620B-SD

LC420DUE-MGP2 FHD, 60Hz LGD 42LF6200-SD

LC490DUE-MGP2 FHD, 60Hz LGD 49LF6200-SD

LC550DUE-MGP2 FHD, 60Hz LGD 55LF6200-SD

LC430EUE-FHM1 FHD, 60Hz LGD 43LF5400-SA

NC490EUN-AACR1 FHD, 60Hz LGD 49LF5400-SA

9. Operating Environment 1) Temp : 0 ~ 40 deg

2) Humidity : ~ 80 %

10. Storage Environment 1) Temp : -20 ~ 60 deg

2) Humidity : ~ 85 %

55LF5600-SA

Only for training and service purposes

- 7 -

5. External Input Support Format

5.1. Component input(Y, CB/PB, CR/PR)

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

1. 720*480 15.73 59.94 13.5 SDTV ,DVD 480I

2. 720*480 15.73 60 13.5135 SDTV ,DVD 480I

3. 720*480 31.47 59.94 27.0 SDTV 480P

4. 720*480 31.50 60 27.027 SDTV 480P

5. 1280*720 44.96 59.94 74.176 HDTV 720P

6. 1280*720 45.00 60.00 74.25 HDTV 720P

7. 1920*1080 28.12 50.00 74.250 HDTV 1080I

8. 1920*1080 33.72 59.94 74.176 HDTV 1080I

9. 1920*1080 33.75 60.00 74.25 HDTV 1080I

10. 1920*1080 26.97 23.976 74.176 HDTV 1080P

11. 1920*1080 27.00 24.000 74.25 HDTV 1080P

12. 1920*1080 33.71 29.97 74.176 HDTV 1080P

13. 1920*1080 33.75 30.000 74.25 HDTV 1080P

14. 1920*1080 56.25 50.00 148.50 HDTV 1080P

15. 1920*1080 67.43 59.939 148.352 HDTV 1080P

16. 1920*1080 67.50 60.00 148.50 HDTV 1080P

5.2. HDMI Input (PC/DTV)

*HDMI PC support only Rear HDMI Input *If use DVI to HDMI cable for PC, you have to use external SPK for PC audio sound.

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

PC DDC

640*350 31.46 70.09 25.17 EGA X

2 720*400 31.46 70.08 28.32 DOS O

3 640*480 31.46 59.94 25.17 VESA(VGA) O

4 800*600 37.87 60.31 40.00 VESA(SVGA) O

1024*768 48.36 60.00 65.00 VESA(XGA) O

1152*864 54.34 60.053 80.00 VESA O

1360*768 47.71 60.015 85.50 VESA (WXGA) O

1280*1024 (FHD Only) 63.98 60.02 108.00 VESA (SXGA) O

1920*1080 (FHD Only) 67.5 60 148.5 HDTV 1080P O

3840 x 2160 (UF67 ONLY) 67.5 30.00 297.00

3840 x 2160 (UF67 ONLY) 56.25 25.00 297.00

3840 x 2160 (UF67 ONLY) 54.0 24.00 297.00

4096 x 2160 (UF67 ONLY) 53.95 23.97 296.703

4096 x 2160 (UF67 ONLY) 54 24.00 297.00

Only for training and service purposes

- 8 -

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

DTV

640 * 480 31.46 59.94 25.125 SDTV 480P

640 * 480 31.5 60.00 25.125 SDTV 480P

720*480 31.47 59.94 27.000 SDTV 480I

720*480 31.50 60.00 27.027 SDTV 480I

1280*720 37.50 50.00 74.25 HDTV 720P

1280*720 44.96 59.94 74.176 HDTV 720P

1280*720 45.00 60.00 74.25 HDTV 720P

1920*1080 28.12 50.00 74.25 HDTV 1080I

1920*1080 33.72 59.94 74.176 HDTV 1080I

1920*1080 33.75 60.00 74.25 HDTV 1080I

1920*1080 26.97 23.97 74.176 HDTV 1080P

1920*1080 27.00 24.00 74.25 HDTV 1080P

1920*1080 33.71 29.97 74.176 HDTV 1080P

1920*1080 33.75 30.00 74.25 HDTV 1080P

1920*1080 56.25 50.00 148.50 HDTV 1080P

1920*1080 67.43 59.94 148.352 HDTV 1080P

1920*1080 67.5 60.00 148.50 HDTV 1080P

3840 x 2160(UF67 ONLY) 53.95 23.98 UDTV 2160P

3840 x 2160(UF67 ONLY) 54 24.00 UDTV 2160P

3840 x 2160(UF67 ONLY) 56.25 25.00 UDTV 2160P

3840 x 2160(UF67 ONLY) 61.43 29.97 UDTV 2160P

3840 x 2160(UF67 ONLY) 67.5 30.00 UDTV 2160P

3840 x 2160(UF67 ONLY) 135 60.00 UDTV 2160P

3840 x 2160(UF67 ONLY) 135 59.94 UDTV 2160P

4096 x 2160(UF67 ONLY) 53.95 23.98 UDTV 2160P

4096 x 2160(UF67 ONLY) 54 24.00 UDTV 2160P

4096 x 2160(UF67 ONLY) 56.25 25.00 UDTV 2160P

4096 x 2160(UF67 ONLY) 61.43 29.97 UDTV 2160P

4096 x 2160(UF67 ONLY) 67.5 30.00 UDTV 2160P

4096 x 2160(UF67 ONLY) 135 60.00 UDTV 2160P

4096 x 2160(UF67 ONLY) 135 59.94 UDTV 2160P

※ HDMI Monitor Range Limits Min Vertical Freq - 58 Hz Max Vertical Freq - 62 Hz Min Horiz. Freq - 30 kHz Max Horiz. Freq - 83 kHz Pixel Clock - 160 MHz

Only for training and service purposes

- 9 -

ADJUSTMENT INSTRUCTION

1. Application

This spec sheet is applied all of the LED TV with LJ55H chassis.

2. Designation

(1) The adjustment is according to the order which is

designated and which must be followed, according to the

plan whic al Unit: Product Specification Standard. (2) Power adjustment : Free Voltage. (3) Magnetic Field Condition: Nil. (4) Input signal Unit: Product Specification Standard. (5) Reserve after operation: Above 5 Minutes (Heat Run). Temperature : at 25 ºC±5 Relative humidity : 65 ± 10% Input voltage : 100~220V, 50/60Hz (6) Adjustment equipments : Color Analyzer (CA-210 or

CA-110), SVC remote controller (7) Push The “IN STOP KEY” – For memory initialization.

Case1 : Software version up

1) After downloading S/W by USB , TV set will reboot automatically

2) Push “In-stop” key

3) Push “Power on” key

4) Function inspection

5) After function inspection, Push “In-stop” key.

ºC

3. Main PCB check process

* APC – After Manual-Insert, executing APC * Boot file Download

(1) Execute ISP program “Mstar ISP Utility” and then click

“Config” tab.

(2) Set as below, and then click “Auto Detect” and check “OK”

message.

If “Error” is displayed, Check connection between

computer, jig, and set.

(3) Click “Read” tab, and then load download file (XXXX.bin)

by clicking “Read”

(1)

filexxx.bin

(4) Click “Connect” tab. If “Can’t ” is displayed, Check

connection between computer, jig, and set.

(2)

(3)

Case2 : Function check at the assembly line

1) When TV set is entering on the assembly line, Push

“In-stop” key at first.

2) Push “Power on” key for turning it on.

=> If you push “Power on” key, TV set will recover channel

information by itself.

3).After function inspection, Push “In-stop” key.

Please Check the Speed

To use speed between

from 200KHz to 400KHz

(5) Click “Auto” tab and set as below. (6) Click “Run”. (7) After downloading, check “OK” message.

(4)

filexxx.bin

(5)

(7)...........OK

(6)

Only for training and service purposes

- 10 -

* USB DOWNLOAD(*.epk file download)

(1) Put the USB Stick to the USB socket. (2) Automatically detecting update file in USB Stick.

- If your downloaded program version in USB Stick is Low, it didn't work. But your downloaded version is High, USB data is automatically detecting

(3) Show the message "Copying files from memory"

(4) Updating is staring.

(5) After updating is complete, The TV will restart automatically. (6) If TV turns on, check your updated version and Tool option.

(refer to the next page about tool option)

* If downloading version is higher 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 controller. (2) Select "Tool Option 1" and Push "OK" button. (3) Punch in the number. (Each model has their number.) (4) Completed selecting Tool option.

Tool

Model Module

43LF5400-SA/

49LF5400-SA/

32LF550B-SD LGD 32807 1160 4032 36384 13826 273

49LF5500-SD LGD 32814 1160 4032 36384 13826 273

32LF565B-SE LGD 32775 3208 4032 36384 13826 273

32LF5650-SE LGD 32775 3208 4032 36384 13826 273

39LF5600-SA INX 32777 3208 4032 3616 13826 273

50LF5650-SE LGD 32783 3208 4032 36384 13826 273

55LF5600-SA 55LF5650-SE

60LB5650-SE Sharp 11281 3208 4032 36384 12802 273

40LF5700-SA LGD 34186 3208 4032 36384 12802 273

43LF5700-SA LGD 33164 3208 3904 36384 13826 273

32LF620B-SD LGD 32871 3208 8128 52768 13826 353

42LF6200-SD LGD 32875 3208 8128 52768 13826 353

49LF6200-SD LGD 32878 3208 8128 52768 13826 353

55LF6200-SD LGD 32880 3208 8128 52768 13826 353

43UF6750-SJ LGD 41388 2440 36686 36387 8706 353

49UF6750-SJ LGD 41390 2440 36686 36387 8706 353

55UF6700-SA

55UF6750-SJ

option1

option2

option3

option4

option5

LGD 460 1193 3904 36384 9218 273

LGD 462 1193 3904 36384 9218 273

CSOT 39975 1160 4032 36384 12806 273

BOE 38951 1160 4032 36384 12806 273

Sharp 35879 1160 4032 36384 12806 273

CSOT 39943 3208 4032 36384 12806 273

BOE 38919 3208 4032 36384 12806 273

Sharp 35847 3208 4032 36384 12086 273

BOE 38919 3208 4032 36384 12802 273

LGD 32784

CSOT 39952

LGD 41392 2440 36686 36387 8706 353

CSOT 48560 2440 36686 36387 8722 353

3208 4032 36384 13826 273

* RS-232C Connection Method Connection : PCBA (USB Port) -> USB to Serial Adapter

(UC-232A) -> RS-232C cable -> PC(RS-232C port)

▪ Product name of USB to Serial Adapter is UC-232A.

※ Caution: LJ55H chassis support only UC-232A driver. (only

use this one. )

Tool

option6

Only for training and service purposes

- 11 -

4. Total Assembly line process

4.1. Adjustment Preparation

■ W/B Equipment condition

CA210 : CH14, Test signal : Inner pattern (80IRE) – in case of

LED back light

■ Above 5 minutes H/run in the inner pattern. (“power on” key of

adjust remote control)

► The spec of color temperature and coordinate

Model Mode Color Temp Color coordinate Remark

Cool (C50) 13,000k

Medium (0) 9,300k

All

Warm (W50) 6,500k

► CA210 : CH 14, Test signal : Inner pattern (80IRE)

- Standard color coordinate and temperature using CA-1000 (by H/R time)

▪ L15 LGD, INX Module

March to December & Global Normal line (LF55/56/57/62, UF67)

H/R Time(Min)

271 270 286 289 313 329

1 0-2 282 289 297 308 324 348

2 3-5 281 287 296 306 323 346

3 6-9 279 284 294 303 321 343

4 10-19 277 280 292 299 319 339

5 20-35 275 277 290 296 317 336

6 36-49 274 274 289 293 316 333

7 50-79 273 272 288 291 315 331

8 80-119 272 271 287 290 314 330

9 Over 120 271 270 286 289 313 329

x = 0.271 (±0.002) y = 0.270 (±0.002)

x = 0.286 (±0.002) y = 0.289 (±0.002)

x = 0.313 (±0.002) y = 0.329 (±0.002)

Cool Medium Warm

x y x x y x

※ Test signal

- Inner pattern for W/B adjust

- External white pattern (80IRE, 204gray)

▪ Gumi Winter table(

January to February - Gumi production of prospective models all

models except Cinema Screen

Normal line (LF55/56/57/62, UF67)

Cool Medium Warm

H/R Time(Min)

1 0-2 286 295 301 314 328 354

2 3-5 284 290 299 309 326 349

3 6-9 282 287 297 306 324 346

4 10-19 279 283 294 302 321 342

5 20-35 276 278 291 297 318 337

6 36-49 274 275 289 294 316 334

7 50-79 273 272 288 291 315 331

8 80-119 272 271 287 290 314 330

9 Over 120 271 270 286 289 313 329

▪

INX, AUO, Sharp, CSOT (13000K Cool the SPEC)

spec 271 270 286 289 313 329

target 278 280 293 299 320 339

x y x x y x

271 270 286 289 313 329

cool med warm

x y x y x y

※ Connecting picture of the measuring instrument (On Automatic control)

Inside PATTERN is used when W/B is controlled. Connect to auto controller or push Adjustment R/C POWER-ON -> Enter the mode of White-Balance, the pattern will come out.

▪ Aging chamber line (LF55/56/57/62, UF67)

Cool Medium Warm

H/R Time(Min)

1 0-5 280 285 294 308 319 340

2 6-10 276 280 290 303 315 335

3 11-20 272 275 286 298 311 330

4 21-30 269 272 283 295 308 327

5 31-40 267 268 281 291 306 323

6 41-50 266 265 280 288 305 320

7 51-80 265 263 279 286 304 318

8 81-119 264 261 278 284 303 316

9 Over 120 264 260 278 283 303 315

Only for training and service purposes

x y x x y x

271 270 285 293 313 329

● Auto-control interface and directions

(1) Adjust in the place where the influx of light like floodlight

around is blocked. (Illumination is less than 10ux).

(2) Adhere closely the Color Analyzer ( CA210 ) to the module

less than 10cm distance, keep it with the surface of the Module and Color Analyzer’s Prove vertically.(80~100°).

(3) Aging time

- After aging start, keep the power on (no suspension of power supply) and heat-run over 5 minutes.

- Using ‘no signal’ or ‘full white pattern’ or the others, check the back light on.

- 12 -

● Auto adjustment Map(RS-232C)

RS-232C COMMAND [ CMD ID DATA ] Wb 00 00 White Balance Start Wb 00 ff White Balance End

RS-232C COMMAND

[CMD ID DATA]

Cool Mid Warm Cool Mid Warm

R Gain jg Ja jd 00 172 192 192 192

G Gain jh Jb je 00 172 192 192 192

B Gain ji Jc jf 00 192 192 172 192

R Cut 64 64 64 128

G Cut 64 64 64 128

B Cut 64 64 64 128

MIN

CENTER

(DEFAULT)

MAX

*Manual W/B process using adjusts Remote control.(TBD)

■ Color analyzer(CA100+, CA210) should be used in the

calibrated ch by CS-1000

■ Operate the zero-calibration of the CA100+ or CA-210, then

stick sensor to the module when adjusting.

■ After enter Service Mode by pushing “ADJ” key,

■Enter White Balance by pushing “►” key at “8. White Balance”.

(5) Adjust two modes (Medium / Warm) Fix the one of R/G/B gain

to 192 (default data) and decrease the others.

(6) Adj. is completed, Exit adjust mode using “EXIT” key on

Remote controller.

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

8. 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 206 Gray pattern.

※ CASE Cool First adjust the coordinate far away from the target value(x, y). (1) x, y > target i) Decrease the R, G. (2) x, y < target i) First decrease the B gain, ii) Decrease the one of the others. (3) x > target , y< target i) First decrease B, so make y a little more than the target. ii) Adjust x value by decreasing the R (4) x < target , y >target i) First decrease B, so make x a little more than the target. ii) Adjust x value by decreasing the G

How to adjust (1) If G gain is adjusted over 172 and R gain and B gain less

than 192 , Adjust is O.K.

(2) If G gain is less than 172 , increase G gain by up to 172,

and then increase R gain and B gain same amount of increasing G gain.

(3) If R gain or B gain is over 255 , Readjust G gain less than

172, Conform to R gain is 255 or B gain is 255

■ For manual adjustment, it is also possible by the following

sequence. (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 -> 8. White-

Balance then press the cursor to the right (KEY►). When KEY(►) is pressed 206 Gray internal pattern will be

displayed. (4) Adjust Cool modes (i). Fix the one of R/G/B gain to 192 (default data) and

decrease the others

(If G gain is adjusted over 172 and R and B gain less than

192, increase G gain to 192 and increase R gain and B gain

same amount of increasing G gain.) (ii). If G gain is less than 172, Increase G gain by up to 172, and then increase R gain and

G gain same amount of increasing G gain. (iii). If R gain or B gain is over 255, Readjust G gain less than 172, Conform to R gain is 255 or

B gain is 255

※ CASE Medium / Warm First adjust the coordinate far away from the target value(x, y). (1) x, y > target i) Decrease the R, G. (2) x, y < target i) First decrease the B gain, ii) Decrease the one of the others. (3) x > target , y< target i) First decrease B, so make y a little more than the target. ii) Adjust x value by decreasing the R (4) x < target , y >target i) First decrease B, so make x a little more than the target. ii) Adjust x value by decreasing the G

▪ After You finish all adjustments, Press “In-start” button and

compare Tool option and Area option value with its BOM, if it is correctly same then unplug the AC cable. If it is not same, then correct it same with BOM and unplug AC cable. For correct it to the model’s module from factory JIG model.

▪ Push the “IN STOP KEY” after completing the function

inspection.

Only for training and service purposes

- 13 -

4.2. DPM operation confirmation (Only Apply for MNT Model)

Check if Power LED Color and Power Consumption operate as standard.

■ Set Input to RGB and connect D-sub cable to set

■ Measurement Condition: (100~240V@ 50/60Hz)

■ Confirm DPM operation at the state of screen without Signal

4.3. EDID DATA

1) All Data : HEXA Value

2) Changeable Data : *: Serial No : Controlled / Data:01 **: Month : Controlled / Data:00 ***:Year : Controlled ****:Check sum

- Auto Download

■ After enter Service Mode by pushing “ADJ” key,

■ Enter EDID D/L mode.

■ Enter “START” by pushing “OK” key.

※ Caution

* Use the proper signal cable for EDID Download

- Analog EDID : Pin3 exists

- Digital EDID : Pin3 exists

For Analog EDID For HDMI EDID

D-sub to D-sub DVI-D to HDMI or HDMI to HDMI

No. Item Condition Hex Data

1 Manufacturer ID GSM 1E6D

2 Version Digital : 1 01

3 Revision Digital : 3 03

● EDID DATA

(1) HD 2D EDID Data (32LF550B/32LF565B)

Before S/W version

CheckSum(0xFF) Physical Address (0x1E)

HDMI 1 74 / 5B 10

HDMI 2 74 / 4B 20

※ Edid data and Model option download (RS232C)

NO Item CMD 1 CMD 2 Data 0

Enter download MODE

Edid data and Model option download

Download ‘Mode In’

Download A E 00 10

A A 0 0

- HDMI1/2 (128)

- HDMI1 (256)

When transfer the ‘Mode In’, Carry the command

Automatically download (The use of a internal Data)

- HDMI2 (256)

Only for training and service purposes

- 14 -

(2) FHD 2D EDID Data (S/W 1.01.20) (LF54, LF55, LF56, LF57

Series)

CheckSum(0xFF) Physical Address (0x1E)

HDMI 1 40 / 25 10

HDMI 2 40 / 15 20

- HDMI1/2 (128)

- HDMI1 (256)

- HDMI2 (256)

(4) FHD 3D DTS EDID Data (42/49/55LF6200)

CheckSum(0xFF) Physical Address (0x1E)

HDMI 1 40 / 1A 10

HDMI 2 40 / 0A 20

- HDMI2 (256)

(3) HD 3D DTS EDID Data (32LF620B)

- Before S/W version 3.03.06

CheckSum(0xFF) Physical Address (0x1E)

HDMI 1 74 / 50 10

HDMI 2 74 / 40 20

- HDMI1/2 (128)

- HDMI1 (256)

- HDMI2 (256)

Only for training and service purposes

- 15 -

(5) FHD 2D 10Bit EDID Data (Only 60LF56)

CheckSum(0xFF) Physical Address (0x1E)

HDMI 1 40 / DE 10

HDMI 2 40 / CE 20

- HDMI1/2 (128)

- HDMI1 (256)

- HDMI2 (256)

- HDMI1 (256)

- HDMI2 (256)

(8) UHD EDID data(2D, DTS, 6G, Deep color on)

- HDMI1/2 (128)

(6) UHD 2D 10Bit EDID Data (UF67)

CheckSum(0xFF) Physical Address

Deep color off6GDeep color on

HDMI 1 E6 / 71 A0 / C7 10

HDMI 2 E6 / 61 A0 / B7 20

(7) UHD EDID data(2D, DTS, 3G, Deep color off)

- HDMI1/2 (128)

- HDMI1 (256)

(0x1E)

- HDMI2 (256)

Only for training and service purposes

- 16 -

4.5. Outgoing condition Configuration

■ When pressing IN-STOP key by SVC remocon, Red LED

are blinked alternatively. And then automatically turn off.

(Must not AC power OFF during blinking)

4.6. GND & Hi-pot test

4.6.1. GND & HI-POT auto-check preparation

(1) Check the POWER CABLE and SIGNAL CABE insertion

condition

4.6.2. 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.

4.6.3. Checkpoint

(1) Test voltage ① 3 Poles

- GND: 1.5KV/min at 100mA

- SIGNAL: 3KV/min at 100mA ② 2 Poles

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

- GND Test = POWER CORD GND and SIGNAL CABLE

GND.

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

NEUTRAL.

② 2 Poles

- Hi-pot Test = Accessible Metal and LIVE & NEUTRAL. (4) LEAKAGE CURRENT: At 0.5mArms

6. 3D Function Test (Only LF620)

(Pattern Generator MSHG-600, MSPG-6100 [SUPPORT HDMI1.4]) * HDMI mode NO. 872 , pattern No.83

1) Please input 3D test pattern like below (HDMI mode NO. 872 , pattern No.83)

2) When 3D OSD appear automatically , then select OK button.

3) Don’t wear a 3D Glasses, Check the picture like below

5. Local Dimming Function Check (Only UF67)

Step1) Turn on TV. Step2) Press “P-only” key, enter to power only mode and

escape the “P-only” Mode by pressing “Exit” key Step3) Press “Tilt” key, entrance to Local Dimming mode. Step4) At the Local Dimming mode, module Edge Backlight

moving Top to bottom Back light of module moving Step5) confirm the Local Dimming mode Step6) Press “Exit” key

Only for training and service purposes

- 17 -

BLOCK DIAGRAM

(P1801 or P1101)

30P HD LVDS wafer

51P F HD LVDS wafer

(P1800 or P1100)

Serial Flash

(8Mbit)

IC1300

SPI_SCK/SDI/SDO/CS

Syste m EEPROM

(256Kbit )

IC104

I2C_SCL/SDA

RX A0+/-~R XA4+/-, RXACK+/-

RXB0+/-~RXB 4+/-, RXBCK+/-

SPK_R

SPK_L

AMP_SCL/SDA

AUD_MASTER_CLK,

AUD_LRCH,

AUD_LRCK, AUD_SCK

TAS5733

(IC5600)

Connector

(P4600)

KEY1/2, LED_R, IR

AVDD5V_MHL,MHL_OCP

X-tal

24M

COMP2_L/R_IN

COMP2_Y+/AV_CVBS_IN, COMP2_Pb+/Pr+

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

DDC_SCL/SDA_2, HDMI_CEC

REAR

HDMI1

(JK800)

F-SCART

(JK2801)

AV2

SPDIF_OUT

SPDIF (Optic)

(JK1001)

SIDE

USB

(JK700)

HDMI2(MHL)

(JK801)

CK+/-, D0+/-, D1+/-, D2+/-,_HDMI4, DDC_SCL/SDA_4, HDMI_CEC

SIDE_USB_DM/DP

USB1_OCP/CTL

TPS65282

+5V_USB

MHL_CD_SENSE

HP_L/ROUT, SIDE_HP_MUTE

Headphone

(JK3000)

CI Slot( P1900)

NAND FLASH

IC102 (1Gb it)

H27U1G8F 2CTR-BC

PCM_A[0:7]

TC74LCX244FT

Buffer

TS_DATA[0:7]

PCM_DATA[0:7]

EPHY

LAN

(JK2100)

COMPON ENT

(JK2802)

5V_HDMI_4

PCM_A[8:14]

SC1/AV2_CVBS_IN,

DTV/MNT_OUT, DTV/MNT_L/R_OUT

SC1_R+/G+/B+, COM1_Y+/Pb+/Pr+

TU_SCL / SDA

F/NIM

DEMOD_SCL/SDA

IF_N/P

IF_AGC

FE_TS_D ATA[0:7]

LNB_TX

LNB_OUT, DEMOD_RESET

Main SOC

M1A -256MB

(IC101)

AV2_L/R_IN

AV2_CVBS_IN

DDR3 SDRAM

(1Gbit)

IC1201

B-MDQL[0-7], B-MDQU[0-7],…

Only for M1A-128MB

1. Lownd 60Hz Block Diagram(M1A, 10W@6Ω)

Only for training and service purposes

- 18 -

2. Lowend 120Hz Block Diagram(M1A+URSA8, 10W@6Ω)

(P1101)

30P HD LVDS wafer

51P F HD LVDS wafer

(P1100)

Serial Flash

(8Mbit)

IC1300

SPI_SCK/SDI/SDO/CS

Syst em EEPROM

(256Kbit )

IC104

I2C_SCL/SDA

RX A0+/-~R XA4+/-, RXACK+/-

RXB0+/-~RXB 4+/-, RXBCK+/-

SPK_R

SPK_L

AMP_SCL/SDA

AUD_MASTER_CLK,

AUD_LRCH,

AUD_LRCK, AUD_SCK

TAS5733

(IC5600)

Connector

(P4600)

KEY1/2, LED_R, IR

DDR3 SDRAM

(1Gbit)

IC1201

B-MDQL[0-7], B-MDQU[0-7],…

Main SOC

M1A -256MB

(IC101)

LGE7438

(IC6101)

URSA8

COMP2_L/R_IN

COMP2_Y+/AV_CVBS_IN, COMP2_Pb+/Pr+

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

DDC_SCL/SDA_2, HDMI_CEC

REAR

HDMI1

(JK800)

F-SCART

(JK2801)

AV2

SPDIF_OUT

SPDIF (Optic)

(JK1001)

SIDE

USB

(JK700)

HDMI2(MHL)

(JK801)

CK+/-, D0+/-, D1+/-, D2+/-,_HDMI4, DDC_SCL/SDA_4, HDMI_CEC

SIDE_USB_DM/DP

USB1_OCP/CTL

TPS65282

+5V_USB

MHL_CD_SENSE

HP_L/ROUT, SIDE_HP_MUTE

Headphone

(JK3000)

CI Slot( P1900)

NAND FLASH

IC102 (1Gb it)

H27U1G8F 2CTR-BC

PCM_A[0:7]

TC74LCX244FT

Buffer

TS_DATA[0:7]

PCM_DATA[0:7]

EPHY

LAN

(JK2100)

COMPON ENT

(JK2802)

5V_HDMI_4

PCM_A[8:14]

SC1/AV2_CVBS_IN,

DTV/MNT_OUT, DTV/MNT_L/R_OUT

SC1_R+/G+/B+, COM1_Y+/Pb+/Pr+

TU_SCL / SDA

F/NIM

DEMOD_SCL/SDA

IF_N/P

IF_AGC

FE_TS_D ATA[0:7]

LNB_TX

LNB_OUT, DEMOD_RESET

X-tal

24M

AV2_L/R_IN

AV2_CVBS_IN

Only for M1A-128MB

120Hz : URSA8

Only for training and service purposes

- 19 -

EXPLODED VIEW

IMPORTANT SAFETY NOTICE

Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the Schematic Diagram and EXPLODED VIEW. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer.

900

410

901

400

LV1

401

521

540

200

120

A10

530

Set + Stand

Only for training and service purposes

- 20 -

TP for NON-EU models(except EU and China)

LGE Internal Use Only

TP for CI slot

/PCM_REG

/PCM_OE

/PCM_WE

/PCM_IORD PCM_A[11]

/PCM_IOWR CI_TS_DATA[1]

/PCM_CE

/PCM_IRQA

/PCM_CD

/PCM_WAIT

PCM_RST

PCM_5V_CTL

/CI_DET

TP for S2

PCM_D[0]

PCM_D[2]

PCM_D[3]

PCM_D[4]

PCM_D[5]

PCM_D[6]

PCM_D[7]

PCM_A[8]

PCM_A[9]

PCM_A[10]

PCM_A[12]

PCM_A[13]

PCM_A[14]

TP for FE_TS_DATA

CI_TS_CLK

CI_TS_VAL

CI_TS_SYNC

CI_TS_DATA[0]

CI_TS_DATA[2]

CI_TS_DATA[3]

CI_TS_DATA[4]

CI_TS_DATA[5]

CI_TS_DATA[6]

CI_TS_DATA[7]

TP for SCART

SCART1_MUTE

SC1_IDPCM_D[1]

SC1_FB

DTV/MNT_VOUT

SCART1_Lout

SCART1_Rout

SC1_R+/COMP1_Pr+

SC1_G+/COMP1_Y+

SC1_B+/COMP1_Pb+

SC1/COMP1_DET

SC1/COMP1_L_IN

SC1/COMP1_R_IN

TP for Headphone

HP_LOUT

HP_ROUT

SIDE_HP_MUTE

HP_DET

TP for L15

/VBUS_EN

RGB_DDC_SCL

RGB_DDC_SDA

TU_GND_A

FE_TS_DATA[1]

FE_TS_DATA[2]

FE_TS_DATA[3]

FE_TS_DATA[4]

FE_TS_DATA[5]

FE_TS_DATA[6]

FE_TS_DATA[7]

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

L15_M1A

TP_NON_EU 3

140702

Contents of Standard Repair Process

LGE Internal Use Only

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

2 No video/No audio 2

3 Tuning fail, Picture broken/ Freezing 3, 4

4 Color error 5

9 Wrecked audio/discontinuation/noise 10

11 External device recognition error 12

A. Video error

B. Power error

C. Audio error

D. Function error

No video/Normal audio 1

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

No power 7

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

No audio/Normal video 9

Remote control & Local switch checking 11

12 E. Noise Circuit noise, mechanical noise 13

13 F. Exterior error Exterior defect 14

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

1 / 97

Standard Repair Process

LGE Internal Use Only

Error

symptom

A. Video error

No video/ Normal audio

Established

date

Revised date

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

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

☞A4 ☞A1

Check Back Light On with naked eye

☞A2

Check Power Board 13.2V output

Normal voltage

Repair Power Board or parts

Y N Check Power Board

13.2V etc.

Replace Inverter

or module

Normal

voltage

Repair Power Board or parts

End

No video Normal audio

Normal

audio

Move to No video/No audio

1/14

Replace T-con Board or module

※Precaution

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

☞A6 & A3

Replace Main Board

2 / 97

Re-enter White Balance value

+ 52 hidden pages