LG 37LK456C-ZB Schematic

Internal Use Only

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LCD TV

SERVICE MANUAL

CHASSIS : LD0EC

MODEL : 37LK456C 37LK456C-ZB

CAUTION

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

Printed in KoreaP/NO : MFL67467602 (1202-REV00)

CONTENTS

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

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

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

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

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

TROUBLE SHOOTING GUIDE ............................................................... 16

BLOCK DIAGRAM ................................................................................. 24

EXPLODED VIEW .................................................................................. 25

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

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 th e cir cuitry 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 exp ose d metallic par t. 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 specification is applied to the LCD TV used LD0EC chassis.

2. Requirement for Test

Each part is tested as below without special appointment.

(1) Temperature: 25 °C ± 5 °C(77 °F ± 9 °F), CST: 40 °C ± 5 °C (2) Relative Humidity: 65 % ± 10 % (3) Power Voltage

: Standard input voltage (AC 100-240 V~, 50/60 Hz) * Standard Voltage of each products is marked by models.

(4) Specification and performance of each parts are followed

ea ch dra wing and speci ficat ion by part number in accordance with BOM.

(5) The receiver must be operated for about 5 minutes prior to

the adjustment.

3. Test method

1) Performance: LGE TV test method followed

2) Demanded other specification

- Safety : CE, IEC specification

- EMC : CE, IEC

4. Model General Specification

No. Item Specication Remarks

EU(PAL Market-36Countries) DTV –T/C & Analog

Germany, Netherland, Switzerland, Hungary, Austria, Slovenia, Sweden, Denmark, Finland, Norway, Bulgaria

DTV-T & Analog

1 Market

UK, France, Spain, Italy, Belgium, Russia, Luxemburg, Greece, Czech, Croatia, Turkey, Moroco, Ireland, Latvia, Estonia, Lithuania, Poland, Portugal, Romania, Ukraine

Analog Only

Kazakhstan, Albania, Bosnia, Serbia, Slovakia

1) PAL-BG

2) PAL-DK

2 Broadcasting system

3 Receiving system

4 Scart Jack (1EA) PAL, SECAM 5 Video Input RCA(1EA) PAL, SECAM, NTSC 4 System : PAL, SECAM, NTSC, PAL60 6 Component Input (1EA) Y/Cb/Cr, Y/Pb/Pr 7 RGB Input RGB-PC Analog(D-SUB 15PIN)

8 HDMI Input (3EA)

9 Audio Input (3EA) RGB/DVI Audio, Component, AV L/R Input

10 SDPIF out (1EA) SPDIF out

11 Earphone out (1EA)

12 USB (1EA)

13 DVB

3) PAL-I/I’

4) SECAM L/L’

5) DVB-T/C/S(ID TV) Analog : Upper Heterodyne

Digital : COFDM, QAM

HDMI1-DTV/DVI HDMI2-DTV HDMI3-DTV

Antenna, AV1, AV2, Component, RGB, HDMI1, HDMI2, HDMI3

For SVC (download) DVIX

DVB-T

DVB-C

DVB-S CI+ : Germany(Astra HD+ )

Scart 1 Jack is Full scart and support RF-OUT(analog).

PC(HDMI version 1.3) Support HDCP Input port is different by model.

CI : UK, Finland, Denmark, Norway, Sweden, Russia,

Spain, Ireland, Luxemburg, Belgium, Netherland

CI+ : France(Canal+), Italy(DGTVi) CI : Switzerland, Austria, Slovenia, Hungary, Bulgaria

CI+ : Switzerland(UPC,Cablecom), Netherland(Ziggo),

Germany(KDG,CWB), Finland(labwise)

Only for training and service purposes

- 6 -

5. Component Input (Y, PB, PR)

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

1 720×480 15.73 60.00 SDTV, DVD 480i

2 720×480 15.63 59.94 SDTV, DVD 480i

3 720×480 31.47 59.94 480p

4 720×480 31.50 60.00 480p

5 720×576 15.625 50.00 SDTV, DVD 625 Line

6 720×576 31.25 50.00 HDTV 576p

7 1280×720 45.00 50.00 HDTV 720p

8 1280×720 44.96 59.94 HDTV 720p

9 1280×720 45.00 60.00 HDTV 720p

10 1920×1080 31.25 50.00 HDTV 1080i

11 1920×1080 33.75 60.00 HDTV 1080i

12 1920×1080 33.72 59.94 HDTV 1080i

13 1920×1080 56.250 50 HDTV 1080p

1920×1080 67.5 60 HDTV 1080p

6. RGB Input (PC)

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

1 720*400 31.468 70.08 28.321 For only DOS mode

2 640*480 31.469 59.94 25.17 VESA

3 800*600 37.879 60.31 40.00 VESA

4 1024*768 48.363 60.00 65.00 VESA(XGA)

5 1360*768 47.72 59.8 84.75 WXGA FHD model

6 1280*1024 63.981 60.02 108.875 SXGA FHD Model

7 1920*1080 67.5 60 148.5 WUXGA FHD model

Input 848*480 60Hz, 852*480 60Hz → 640*480 60Hz Display

Only for training and service purposes

- 7 -

7. HDMI Input(PC/DTV)

7.1. DTV mode

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

1. 720*480 31.469 / 31.5 59.94 / 60 27.00/27.03 SDTV 480P

2. 720*576 31.25 50 54 SDTV 576P

3. 1280*720 37.500 50 74.25 HDTV 720P

4. 1280*720 44.96 / 45 59.94 / 60 74.17/74.25 HDTV 720P

5. 1920*1080 33.72 / 33.75 59.94 / 60 74.17/74.25 HDTV 1080I

6. 1920*1080 28.125 50.00 74.25 HDTV 1080I

7. 1920*1080 26.97 / 27 23.97 / 24 74.17/74.25 HDTV 1080P

8. 1920*1080 33.716/ 33.75 29.976/30.00 74.25 HDTV 1080P

9. 1920*1080 56.250 50 148.5 HDTV 1080P

10. 1920*1080 67.43 / 67.5 59.94 / 60 148.35/148.50 HDTV 1080P

7.2. PC mode

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

1. 720*400 31.468 70.08 28.321 HDCP

2. 640*480 31.469 59.94 25.17 VESA HDCP

3 800*600 37.879 60.31 40.00 VESA HDCP

4. 1024*768 48.363 60.00 65.00 VESA(XGA) HDCP

6. 1360*768 47.72 59.8 84.75 WXGA HDCP

7. 1280*720 45 60 74.25 HDCP

8. 1280*1024 63.981 60.02 108.875 SXGA HDCP / FHD model

9. 1920*1080 67.5 60 148.5 WUXGA HDCP / FHD model

Only for training and service purposes

- 8 -

ADJUSTMENT INSTRUCTION

1. Application Range

This specification sheet is applied to all of the LCD TV with LD0EC chassis.

2. Designation

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

and which must be followed, according to the plan

can be changed only on agreeing. (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 °C ± 5 °C Relative humidity : 65 ± 10 % Input voltage : 220 V, 60 Hz (6) Adjustment equipments: Color Analyzer(CA-210 or CA-110),

DDC Adjustment Jig, Service remote control.

(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.

Case2 : Function check at the assembly line

1. When TV set is entering on the assembly line, Push “In-stop” key at rst.

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.

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

which

(4) Click "Connect" tab. If "Can't" is displayed, check connection

between computer, jig, and set.

(2)

(3)

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)

* USB 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 starting.

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

Tool option. (explain the Tool option, next stage)

* If downloading version is more high than your TV have, TV

can lost all channel data. In this case, you have to channel recover. if all channel data is cleared, you didn’t have a DTV/ ATV test on production line.

Only for training and service purposes

* 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)

- 9 -

3.1. ADC Process

(1) ADC

- Enter Service Mode by pushing "ADJ" key,

- Enter Internal ADC mode by pushing "►" key at "7. ADC Calibration".

0. Tool Option1

1. Tool Option2

. Tool Option3

. Tool Option4

. Tool Option 5

. Country Group

6. Area Option

. ADC Calibration ඖ

8. White Balance

. 10 Point WB

. Test Pattern

1. EDID D/L

2. Sub B/C

3. Touch Sensitivity Setting

EZ ADJUST

<Caution> Using "power on" key of the Adjustment remote

control, power on TV.

* ADC Calibration Protocol (RS232)

NO Item CMD 1 CMD 2 Data 0

Enter Adjust MODE

ADC adjust ADC Adjust A D 1 0

Adjust ‘Mode In’

A A 0 0

ADC Calibration

ADC Comp 480i NG

ADC Comp 1080p NG

ADC RGB NG

Start Reset

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

Automatically adjustment (The use of a internal pattern)

3.3. EDID data

(1) FHD RGB EDID data

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

0 00 FF FF FF FF FF FF 0 0 1E 6D a b 10 c 01 0 3 6 8 10 09 78 0A EE 91 A3 54 4C 99 26 20 0F 5 0 5 4 A1 08 00 81 80 61 40 45 40 31 40 01 01 30 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C 40 45 00 A0 5A 00 0 0 00 1E 66 21 50 B0 51 00 1B 30 50 40 70 3 6 00 A0 5A 00 0 0 0 0 1E 00 00 00 FD 0 0 3A 60 3E 1E 53 10 00 0A 20 20 20 20 20 20 d 70 d 00 e

(2) FHD HDMI EDID data

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

0 00 FF FF FF FF FF FF 00 1E 6D a b 10 c 01 03 80 10 09 78 0A EE 91 A3 54 4C 99 26 20 0F 50 54 A1 08 00 71 4F 81 80 01 01 01 01 01 01 30 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C 40 45 00 A0 5A 00 00 00 1E 1B 21 50 A0 51 00 1E 30 50 48 88 35 00 A0 5A 00 00 00 1C 00 00 00 FD 00 3A 60 3E 1E 53 10 00 0A 20 20 20 20 20 20 d 70 d 01 e 80 02 03 26 F1 4E 10 1F 84 13 05 14 03 02 12 20 21 90 22 15 01 26 15 07 50 09 57 07 f A0 f E3 05 03 01 01 1D 80 18 71 1C 16 20 58 2C B0 25 00 A0 5A 00 00 00 9E 01 1D 00 72 51 D0 1E 20 C0 6E 28 55 00 A0 5A 00 00 00 1E 02 3A 80 18 71 38 D0 2D 40 58 2C 45 00 A0 5A 00 00 00 1E 01 1D 00 BC E0 52 D0 1E 20 B8 28 55 40 A0 5A 00 00 00 1E 00 00 F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 e

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)] (only LD21B) ▪ ad 00 10 [Adjust 1024*768 RGB] (only LD21B) ▪ aa 00 90 End Adjust mode * Required equipment : Adjustment remote control.

3.2. EDID Download

▪ After enter Service Mode by pushing "ADJ" key. ▪ Enter EDID D/L menu. ▪ Enter "START" by pushing "OK" key.

0. Tool Option1

1. Tool Option2

. Tool Option3

. Tool Option4

. Tool Option 5

. Country Group

6. Area Option

7. ADC Calibration

8. White Balance

. 10 Point WB

. Test Pattern

1. EDID D/L

2. Sub B/C

3. Touch Sensitivity Setting

EZ ADJUST

ඖ

<Caution> Never connect HDMI && D-sub cable when EDID

downloaded.

EDID D/L

HDMI1

HDMI2

HDMI3

RGB

Start Reset

(3) Detail EDID Options are below

a. Product ID

MODEL NAME HEX EDID Table DDC Function

HD/FHD Model 0001 01 00 Analog/Digital

b. Serial No: Controlled on production line. c. Month, Year: Controlled on production line:

ex) Week : '01' -> '01'

Year : '2012' -> '16' fix

d. Model Name(Hex):

cf) TV set’s model name in EDID data is below.

Model name MODEL NAME(HEX)

LG TV 00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 (LG TV)

e. Checksum: Changeable by total EDID data.

EDID C/S data

FHD

HDMI RGB

Block 0 E2 ED

Check sum

(Hex)

Block 1

99 (HDMI1)

-89 (HDMI2)

79 (HDMI3)

f. Vendor Specific(HDMI)

Input Model name(HEX)

HDMI1 67030C001000B82D

HDMI2 67030C002000B82D

HDMI3 67030C003000B82D

Only for training and service purposes

- 10 -

3.4 Function Check

- Check display and sound

■ Check Input and Signal items.

1) TV

2) AV (SCART / CVBS)

3) COMPONENT (480i)

4) RGB (PC : 1024 x 768 @ 60hz)

5) HDMI

6) PC Audio In * Display and Sound check is executed by Remote control.

<Caution> Not to push the INSTOP key after completion if the function inspection.

▪ Auto adjustment Map(using RS-232C to USB cable)

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

RS-232C COMMAND [CMD ID DATA]

MIN

CENTER

(DEFAULT)

MAX

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

4. Total Assembly line process

4.1. Adjustment Preparation

▪ W/B Equipment condition

CA210 : CCFL/EEFL -> CH9, Test signal: Inner pattern(80IRE) LED -> CH14, Test signal: Inner pattern(80IRE)

▪ If it is executed W/B adjustment in 2~3 minutes H/run, it is

adjusted by Target data

Mode Temp Coordinate spec

Cool 13,000 K

Medium 9,300 K

Warm 6,500 K

* 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.

Full White Pattern

RS-232C Communication

X=0.269 (±0.002) Y=0.273 (±0.002)

X=0.285 (±0.002) Y=0.293 (±0.002)

X=0.313 (±0.002) Y=0.329 (±0.002)

<Test Signal> Inner pattern (204gray, 80IRE)

CA-210

COLOR ANALYZER TYPE : CA-210

Color Temperature : COOL, Medium, Warm. One of R Gain/G Gain/ B Gain should be kept on 0xC0, and adjust other two lower than C0.(When R/G/B Gain are all C0, it is the FULL Dynamic Range of Module)

* Manual W/B process using adjust Remote control.

▪ After enter Service Mode by pushing "ADJ" key, ▪ Enter White Balance by pushing "►" key at "8. White

Balance".

EZ ADJUST

0. Tool Option1

1. Tool Option2

2. Tool Option3

3. Tool Option4

4. Tool Option5

5. Country Group

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

* After you finished all adjustments, Press "In-start" key 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. And Mechanical Power Switch must be set “ON”.

White Balance

Color Temp.

R-Gain G-Gain B-Gain R-Cut G-Cut B-Cut Test-Pattern Backlight Reset

Cool

172 172 192

64 64

64 ON 100

To Set

* Auto-control interface and directions

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

around is blocked. (illumination is less than 10 lux).

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

less than 10 cm 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 'POWER ONLY' or the others, check the back light on.

Only for training and service purposes

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4.2. EYE-Q function check

(1) Turn on TV. (2) Press “EYE” key on Adjustment remote control. (3) Cover the Eye Q sensor at the front of set for 6 seconds. (4) Check the value of Sensor Data. It must be below 10. If

not so, the Eye Q sensor may have some defect. Change the Eye Q sensor.

(5) Wait for 6 seconds after withdrawing form the Eye Q

sensor.

(6) Check the value of Backlight. It must rise. If not so, the

Eye Q sensor may have some defect. Change the Eye Q sensor.

4.3. 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)

5. GND and HI-POT Test

5.1. GND & HI-POT auto-check preparation

- Check the POWER cable and SIGNAL cable insertion condition

6. Model name & Serial number D/L

▪ Press "Power on" key of service remote control.

(Baud rate : 115200 bps) ▪ Connect RS232 Signal Cable to RS-232 Jack. ▪ Write Serial number by use RS-232. ▪ Must check the serial number at the Diagnostics of SET UP

menu. (Refer to below).

6.1. Signal Table

CMD LENGTH ADH ADL DATA_1 . . . Data_n CS DELAY

CMD : A0h LENGTH : 85~94h (1~16 bytes) ADH : EEPROM Sub Address high (00~1F) ADL : EEPROM Sub Address low (00~FF) Data : Write data CS : CMD + LENGTH + ADH + ADL + Data_1 +...+ Data_n Delay : 20ms

6.2. Comand Set

Adjust mode CMD(hex) LENGTH(hex) Description

EEPROM WRITE A0h 84h+n n-bytes Write (n = 1~16)

* Description

FOS Default write : <7mode data> write

Vtotal, V_Frequency, Sync_Polarity, Htotal, Hstart, Vstart, 0,

Phase

Data write : Model Name and Serial Number write in EEPROM,.

5.2. 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 proc-

ess automatically.

6.3. Method & notice

(1) Serial number D/L is using of scan equipment. (2) Sett ing of scan equ ipm ent operated by Manufac turing

Technology Group.

(3) Serial number D/L must be conformed when it is produced in

production line, because serial number D/L is mandatory by D-book 4.0.

5.3. Checkpoint

(1) Test voltage

- GND: 1.5 KV / min at 100 mA

- SIGNAL: 3 KV / min at 100 mA

(2) TEST time: 1 second (3) TEST POINT

- GND Test = POWER CORD GND and SIGNAL CABLE GND

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

(4) LEAKAGE CURRENT: At 0.5 mArms

Only for training and service purposes

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* Manual Download(Model Name and Serial Number)

If the TV set is downloaded by OTA or Service man, sometimes model name or serial number is initialized.(Not always) There is impossible to download by bar code scan, so It need Manual download.

1) Press the "Instart" key of Adjustment remote control.

2) Go to the menu "6.Model Number D/L" like below photo.

3) Input the Factory model name or Serial number like photo.

4) Check the model name Instart menu. → Factory name displayed. (ex 32LV3400-ZG)

5) Check the Diagnostics.(DTV country only) → Buyer model displayed.(ex 32LV3400-ZG)

7. CI+ key download

7.1 Download Procedure

(1) Press "Power on" key of a service remote control

(Baud rate : 115200 bps) (2) Connect RS232-C Signal Cable. (3) Write CI+ Key through RS-232-C. (4) Check whether the key was downloaded or not at ‘In Start’

menu. (Refer to below).

7.1.1. Check the method of CI+ Key value

(1) Check the method on Instart menu (2) Check the method of RS232C Command

1) Into the main ass’y mode(RS232: aa 00 00)

CMD 1 CMD 2 Data 0

A A 0 0

2) Check the key download for transmitted command

(RS232: ci 00 10)

CMD 1 CMD 2 Data 0

C I 1 0

3) Result value

- Normally status for download : OKx

- Abnormally status for download : NGx

7.1.2. Check the method of CI+ key value(RS232)

1) Into the main ass’y mode(RS232: aa 00 00)

CMD 1 CMD 2 Data 0

A A 0 0

2) Check the mothed of CI+ key by command

(RS232: ci 00 20)

CMD 1 CMD 2 Data 0

C I 2 0

3) Result value i 01 OK 1d1852d21c1ed5dcx

CI+ Key Value

Only for training and service purposes

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