LG 37LB7DF Schematic

LCD TV

SERVICE MANUAL

CAUTION

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

CHASSIS : LT75A

MODEL : 37LB7DF

37LB7DF-DA

LGE Internal Use Only

- 2 -

CONTENTS

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

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

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

ADJUSTMENT INSTRUCTION ...............................................................12

TROUBLE SHOOTING ............................................................................17

BLOCK DIAGRAM...................................................................................25

EXPLODED VIEW .................................................................................. 29

REPLACEMENT PARTS LIST ............................................................... 31

SVC. SHEET ...............................................................................................

LGE Internal Use Only

- 3 -

SAFETY PRECAUTIONS

Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the Schematic Diagram and Replacement Parts List. 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 1W), keep the resistor 10mm 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 1MΩ and 5.2MΩ. 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 1.5K/10watt resistor in parallel with a 0.15uF 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

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

Leakage Current Hot Check circuit

IMPORTANT SAFETY NOTICE

0.15uF

To Instrument's exposed  METALLIC PARTS

AC Volt-meter

Good Earth Ground such as WATER PIPE, CONDUIT etc.

1.5 Kohm/10W

LGE Internal Use Only

- 4 -

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

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

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

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

8. Use with this receiver only the test fixtures specified in this

service manual.

CAUTION: Do not connect the test fixture ground strap to any heat sink in this receiver.

Electrostatically Sensitive (ES) 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 field-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 classified as "anti-static" can generate electrical charges sufficient to damage ES devices.

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

6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads 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 floor can generate static electricity sufficient 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 1.25cm) 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 circuitboard printed foil.

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

(500

F to 600 F)

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

the component lead until the solder melts.

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

component lead and the printed circuit foil, and hold it there only until the solder flows onto and around both the 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.

SERVICING PRECAUTIONS

LGE Internal Use Only

- 5 -

IC Remove/Replacement

Some chassis circuit boards have slotted holes (oblong) through which the IC leads are inserted and then bent flat 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.

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.

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.

LGE Internal Use Only

- 6 -

SPECIFICATION

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

4. General Specification(FHD Module)

5. General Specification : 37LB7DF(LC370WU3-SLA1)

1. Application range

This spec sheet is applied to the 42"/37" LCD TV used LT75A chassis

2. Specification

Each part is tested as below without special appointment.

(1) Temperature : 25 ± 5°C(77 ± 9°F), CST : 40 ± 5°C (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

No. Item Specification Remark

1. Display Screen Device 37/42" wide Color Display Module LCD

2. Aspect Ratio 16:9

3. LCD Module 37LB7DF : LC370WU3-SLA1

42LB7DF : LC420WU6-SLA2

4. Operating Environment Temp. : 0 ~ 40 deg LG SPEC

Humidity : 10 ~ 90 %

5. Storage Environment Temp. : -20 ~ 50 deg LG SPEC

Humidity : 10 ~ 90%

6. Input Voltage AC100 ~ 240V, 50/60Hz Maker LG

No Item Specification Unit Remark

1 Display area 819.36 (H) x 460.89 (V) mm

2 Outline dimension 877 (W) x 516.8 (H) x 55.5 (D) with inverter mm

3 Number of Pixels 1920 (H) x 1080(V) 1Pixel=3RGB Cells

4 Cell pitch 426.75um (H) x 426.75um (V) um G cell

5 Color arrangement RGB stripe arrangement

6 Coating Hard coating(3H), Anti-glare

7 Operating Temperature 0 ~ 40 deg Altitude

Environment Humidity 10 ~ 90 % – 0 to 1400feet

8 Storage Temperature -20 ~ 50 deg Altitude

Environment Humidity 10 ~ 90 % – 0 to 4000feet

LGE Internal Use Only

- 7 -

6. General specifications : 42LB7DF(LC420WU6-SLA2)

No Item Specification Unit Remark

1 Display area 930.24 (H) x 523.26 (V) mm

2 Outline dimension 983 (W) x 576 (H) x 51 (D) with inverter mm

3 Number of Pixels 1920 (H) x 1080(V) 1Pixel=3RGB Cells

4 Cell pitch 484.5um (H) x 484.5um (V) um G cell

5 Color arrangement RGB stripe arrangement

6 Coating Hard coating(3H), Anti-glare

7 Operating Temperature 0 ~ 40 deg Altitude

Environment Humidity 10 ~ 90 % – 0 to 1400feet

8 Storage Temperature -20 ~ 50 deg Altitude

Environment Humidity 10 ~ 90 % – 0 to 4000feet

7. Mechanical specification

1) 37LB7DF

No. Item Content Unit Remark

1. Product Widt(W) Length(D) Height(H) mm

Dimension Before Packing 927 280.5 692.8 mm With Stant

After Packing 1021 296 877 mm

2. Product Only SET 21.5 Kg

With BOX 25 Kg

2) 42LB7DF

No. Item Content Unit Remark

1. Product Widt(W) Length(D) Height(H) mm

Dimension Before Packing 1033.1 300 750 mm With Stant

After Packing 1119 374 858 mm

2. Product Only SET 27.5 Kg

With BOX 32.5 Kg

- 8 -

LGE Internal Use Only

8. Chroma & Brightness

1) 37LB7DF

No Item Min Typ Max Unit

Measurement

Result Remark

1 Viewing R/L 178 Viewing R/L 178

Angle<CR>10> U/D 178 Angle U/D 178

<CR>10>

2. White average 37LB7DF 400 500 - cd/m

- 100IRE Full White Pattern (255 gray)

brightness - Picture : Dynamic (Cool)

3. Brightness uniformity 1.3 0 1.3 cd/m

- 100IRE Full White Pattern (255 gray)

- Picture : Dynamic (Cool)

4. Color White X 0.264 0.279 0.294

- 85IRE Full White Pattern (216 gray)

Coordinate Y 0.277 0.292 0.307 - Picture : Dynamic (Cool)

Red X 0.62 0.635 0.65

Y 0.33 0.345 0.36

Green X 0.27 0.285 0.3

Y 0.601 0.616 0.631

Blue X 0.13 0.145 0.16

Y 0.047 0.062 0.077

5. Color coordinate uniformity -0.03 Average +0.03

- 85IRE Full White Pattern (216 gray)

- Picture : Dynamic (Cool)

6. Contrast Ratio CR with

7000 : 1 10,000 : 1

- Full white(100IRE)

at dark room

PWM-Dimming

- Full black(0IRE) pattern

- Picture : Dynamic (Cool)

- Input : HDMI1,2

=> CR with PWM-Dimming

CR without 650:1 1,000:1

- Input : DTV/Analog/AV/Comp/RGB/HDMI

PWM-Dimming

=> CR without PWM-Dimming

7. Color Temperature Medium 8300 9300 10300

- 85IRE Full White Pattern (216 gray)

Warm 5500 6500 7500 - Picture : Dynamic (Cool)

Cool 10000 11000 12000

8. Color pull in Range PAL -500 +500 Hz

NTSC -500 +500 Hz

9. Color killer Sensitivity -80 dBm

- 9 -

LGE Internal Use Only

2) 42LB7DF

No Item Min Typ Max Unit

Measurement

Result Remark

1 Viewing R/L 178 Viewing R/L 178

Angle<CR>10> U/D 178 Angle U/D 178

<CR>10>

2. White average 42LB7DF 450 550 - cd/m

- 100IRE Full White Pattern (255 gray)

brightness - Picture : Dynamic (Cool)

3. Brightness uniformity 1.3 0 1.3 cd/m

- 100IRE Full White Pattern (255 gray)

- Picture : Dynamic (Cool)

4. Color White X 0.276 0.279 0.282

- 85IRE Full White Pattern (216 gray)

Coordinate Y 0.289 0.292 0.295 - Picture : Dynamic (Cool)

Red X 0.637 0.640 0.643

Y 0.340 0.343 0.347

Green X 0.284 0.287 0.290

Y 0.610 0.613 0.616

Blue X 0.141 0.144 0.147

Y 0.062 0.065 0.068

5. Color coordinate uniformity -0.03 Average +0.03

- 85IRE Full White Pattern (216 gray)

- Picture : Dynamic (Cool)

6. Contrast Ratio CR with

7000 : 1 10,000 : 1

- Full white(100IRE)

at dark room

PWM-Dimming

- Full black(0IRE) pattern

- Picture : Dynamic (Cool)

- Input : HDMI1,2

=> CR with PWM-Dimming

CR without 650:1 1,000:1

- Input : DTV/Analog/AV/Comp/RGB/HDMI

PWM-Dimming

=> CR without PWM-Dimming

7. Color Temperature Medium 8300 9300 10300

- 85IRE Full White Pattern (216 gray)

Warm 5500 6500 7500 - Picture : Dynamic (Cool)

Cool 10000 11000 12000

8. Color pull in Range PAL -500 +500 Hz

NTSC -500 +500 Hz

9. Color killer Sensitivity -80 dBm

9. Average Brightness & Contrast measure standard specification

1) Standard Test Condition

2) Surrounding Brightness Level: dark

3) Surrounding Temperature: 25±2°C

4) Warm-up Time: 30 Min

5) Input Signal: HDMI 1920x1080p 60Hz

LGE Internal Use Only

- 10 -

10. Component Video Input (Y, PB

, PR)

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

1 720*480 15.73 59.94 13.500 SDTV, DVD 480I(525I)

2 720*480 15.75 60.00 13.514 SDTV, DVD 480I(525I)

3 720*480 31.47 59.94 27.000 SDTV 480P

4 720*480 31.50 60.00 27.027 SDTV 480P

5 1280*720 44.96 59.94 74.176 HDTV 720P

6 1280*720 45.00 60.00 74.250 HDTV 720P

7 1920*1080 33.72 59.94 74.176 HDTV 1080I

8 1920*1080 33.75 60.00 74.250 HDTV 1080I

9 1920*1080 67.50 60.00 148.50 HDTV 1080P

11. RGB Input ( PC )

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

Pixel clock(MHz)

Proposed Remarks

1. 720*400 31.468 70.08 28.32

2. 640*480 31.469 59.94 25.17 VESA 848*480 60Hz, 852*480 60Hz

37.500 75.00 31.50 => Display 640*480 60H

3 800*600 37.879 60.31 40.00 VESA

46.875 75.00 49.50

4. 832*624 49.725 74.55 57.283 Macintosh

5 1024*768 48.363 60.00 65.00 VESA(XGA)

56.476 70.00 75.00

60.023 75.03 78.75

6 1280*768 47.693 59.99 80.125 WXGA

7 1360*768 47.649 59.94 84.625 WXGA

8 1366*768 47.649 59.94 84.625 WXGA

9 1280*1024 63.595 60.0 108.875 SXGA

10 1400*1050 65.160 60.0 122.50 SXGA

11 1920*1080 66.647 59.988 138.625 WUXGA Reduced Blanking Timing

LGE Internal Use Only

- 11 -

12. HDMI DTV

- HDMI DTV Table

13. HDMI DTV

- HDMI PC Table

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

1. 720*480 31.47 59.94 27.00 SDTV 480P(4:3) PC mode => Display 640*480

2. 720*480 31.50 60 27.027 SDTV 480P(4:3)

3. 640*480 31.469 59.94 25.175 SDTV 480P(4:3)

4. 640*480 31.469 60.00 25.20 SDTV 480P(4:3)

5. 720*480 31.47 59.94 27.000 SDTV 480P(16:9)

6. 720*480 31.50 60.00 27.027 SDTV 480P(16:9)

7. 720*576 31.25 50.00 27.000 SDTV 576P

8. 1280*720 37.50 50.00 74.176 HDTV 720P

9. 1280*720 44.96 59.94 74.176 HDTV 720P

PC mode =>Display 1280*768 60Hz

10. 1280*720 45.00 60.00 74.250 HDTV 720P

11 1920*1080 33.72 59.94 74.176 HDTV 1080I

12 1920*1080 33.75 60.00 74.250 HDTV 1080I

13 1920*1080 28.125 50.00 74.250 HDTV 1080I 50Hz

14 1920*1080 27.000 24.00 74.250 HDTV 1080P 24Hz

15 1920*1080 56.250 50 148.500 HDTV 1080P 50Hz

16 1920*1080 67.433 59.94 148.352 HDTV 1080P

PC mode =>Display 1920*1080 60Hz

17 1920*1080 67.500 60 148.500 HDTV 1080P

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

1. 720*400 31.468 70.08 28.32

2. 640*480 31.469 59.94 25.17 VESA DTV mode => Display 480p

37.500 75.00 31.50 848*480 60Hz, 852*480 60Hz:

Display No signal

3 800*600 37.879 60.31 40.00 VESA

46.875 75.00 49.50

4. 832*624 49.725 74.55 57.283 Macintosh

5 1024*768 48.363 60.00 65.00 VESA(XGA)

56.476 70.00 75.00

60.023 75.03 78.75

6 1280*768 47.693 59.99 80.125 WXGA

7 1360*768 47.649 59.94 84.625 WXGA

8 1366*768 47.649 59.94 84.625 WXGA

9 1280*1024 63.595 60.0 108.875 SXGA

10 1400*1050 65.160 60.0 122.50 SXGA

11 1920*1080 66.647 59.988 138.625 WUXGA Reduced Blanking Timing

DTV mode =>1080P Display

LGE Internal Use Only

- 12 -

ADJUSTMENT INSTRUCTION

1. Application Object

These instructions are applied to all of the LCD TV, LT75A.

2. Specification

2.1 Because this is not a hot chassis, it is not necessary to use an isolation transformer. However, the use of isolation transformer will help to protect test instruments.

2.2 Adjustment must be done in the correct sequence.

2.3 The adjustment must be performed at 25±5°C temperature and 65±10% relative humidity if there is no specified designation.

2.4 The input voltage of the receiver must be kept between 100~220V, 50/60Hz.

2.5 Before adjustment, execute Heat-Run for 30 minutes at RF no signal.

3. EDID

* Caution

Use the proper signal cable for EDID Download

- Analog EDID : Pin3 exists

- Digital EDID : Pin3 exists

* Caution

- Never connect HDMI & D-sub Cable at the same time.

- Use the proper cables below for EDID Writing.

- Download HDMI1, HDMI2 separately because HDMI1 is

different from HDMI2.

3.1 Data 1> ANALOG(128 Byte)

2> HDMI (256 Byte)

3> HDMI2 (256 Byte)

C/S002020202020200A000E431D4B3C000x07

FD000000

202020202020200A56542047

0x06

4C00FC0000001800002186BC048520500x05

401F3870A08036261C00002186BC00350x04

8848301E0051A050211B0101010101010x03

0101C0D1406140454031006EA54B49110x02

259C4957A3B0D9EA782746010301Month/Year0x01

Serial NoProduct ID6D1E00FFFFFFFFFFFF000x00

0x0F0x0E0x0D0x0C0x0B0x0A0x090x080x070x060x050x040x030x020x010x00

C/A000000001800002188BC00378040300x07

1E005180001F4E180000218EC40055400x06

0C2031402090D00A8C9E0000218EC4800x05

252C1020161C72D0801D011E0000218E0x04

C40055286E201ED05172001D011E00000x03

218EC4405528B8201ED052BC001D01000x02

10000C036500000183070709231022200x01

1F210514041312030111024EF12103020x00

C/S012020202020200A000F431C4B32000x07

FD000000

202020202020200A56542047

0x06

4C00FC0000001C00002186BC003588480x05

301E0051A050211B1E0000218EC400450x04

2C58402D387118803A020101010101010x03

0101C0D1406140454031006EA54B49110x02

259C4957A3B0D9EA782746800301Month/Year0x01

Serial NoProduct ID6D1E00FFFFFFFFFFFF000x00

0x0F0x0E0x0D0x0C0x0B0x0A0x090x080x070x060x050x040x030x020x010x00

C/A000000001800002188BC00378040300x07

1E005180001F4E180000218EC40055400x06

0C2031402090D00A8C9E0000218EC4800x05

252C1020161C72D0801D011E0000218E0x04

C40055286E201ED05172001D011E00000x03

218EC4405528B8201ED052BC001D01000x02

20000C036500000183070709231022200x01

1F210514041312030111024EF12103020x00

C/S012020202020200A000F431C4B32000x07

FD000000

202020202020200A56542047

0x06

4C00FC0000001C00002186BC003588480x05

301E0051A050211B1E0000218EC400450x04

2C58402D387118803A020101010101010x03

0101C0D1406140454031006EA54B49110x02

259C4957A3B0D9EA782746800301Month/Year0x01

Serial NoProduct ID6D1E00FFFFFFFFFFFF000x00

0x0F0x0E0x0D0x0C0x0B0x0A0x090x080x070x060x050x040x030x020x010x00

Before AV ADC Calibration, should be select the

"Tool Option "

4. Select LCD module size and tool.

4.1 Press ADJ Key in the Adjust remocon

4.2 Select "Tool Option1" by using D/E (CH+/-) key, and press A (ENTER).

4.3 Change "Inch" and "Tool" according to the inch of model name

4.4 After changing the panel size, push the EXIT Key.

37LC7D 42LC7D Tool Option1 80 84 Tool Option2 1665 1665

5. ADC Calibration

5.1 Adjustment of RF / AV / S-VIDEO

* Required Equipments

8 Remote controller for adjustment. 8 MSPG-925FS Pattern Generator (Which has Video

Signal: 7 Color Bar Pattern shown in Fig. 1).

=> Model: 207 / Pattern: 65

5.1.1 Method of Auto RF / AV / S-VIDEO Color Balance (NTSC-J).

1) Input the Video Signal: 7 Color Bar signal into AV1

2) Set the PSM to Dynamic mode in the Picture menu.

[Fig.1]

3) Press IN-START key on R/C for adjustment.

[Fig.2]

4) Press the G (Vol.+) key to operate the set, then it

becomes automatically.

5) Auto-RGB OK means the adjustment is completed.

- 13 -

LGE Internal Use Only

- 14 -

5.2 Adjustment of Component

*Required Equipments

8 Remote controller for adjustment 8 MSPG-925FS Pattern Generator. (Which has 720p/60Hz

YPbPr output Pattern shown in Fig. 2)

=> Model: 216 / Pattern: 65

5.2.1 Method of Auto Component Color Balance

1) Input the Component 720p/60Hz 7 Color Bar (MSPG925FS model:216, pattern:65) signal into Component.

2) Set the PSM to Dynamic mode in the Picture menu.

[Fig.1]

3) Press IN-START key on R/C for adjustment.

4) Press the G (Vol.+) key to operate the set, then it

becomes automatically.

5) Auto-RGB OK means the adjustment is completed.

5.3 Adjustment of RGB

*Required Equipments

8 Remote controller for adjustment 8 MSPG-925FS Pattern Generator

(Which has XGA [1024*768] 60Hz 8 color bar 100% pattern shown in Fig. 3 )

5.3.1 Method of Auto RGB Color Balance

1) Input the PC 1024x768 @ 60Hz 7 Color Bar (MSPG925FS model:3, pattern:65) signal into RGB. (using D-sub to D-sub cable)

2) Set the PSM to Dynamic mode in Picture menu.

3) Press the IN-START key on R/C for adjustment.

[Fig.3]

4) Press the G (Vol.+) key operate To set , then it becomes automatically.

5) Auto-RGB OK means adjustment is completed

LGE Internal Use Only

- 15 -

Before adjusting White-balance , the AV ADC

should be done

7. White Balance

*Test Equipment

8 Color Analyzer (CA-210/CH.9)

=> When you adjust LCD color temperature, on Color

analyzer (CA-210), you should use Channel 9 which is Matrix compensated (White, Red, Green, Blue revised) by CS-1000 and adjust in accordance with White balance adjustment coordinate which is specified on the next..

* Color temperature standards according to CSM and Module

CSM Plasma LCD Cool 11,000k 11,000k Medium 9,300k 9,300k Warm 6,500k 6,500k

* White balance adjustment coordinate and color temperature

8 PC (for communication through RS-232C) => UART

Baud rate : 115200 bps

8 l Luminance Y AV : upper 200 cd/ß≥ (Typ : 350 cd/m

) =>

Applying to Cool

- Connecting picture of the measuring instrument (On Automatic control ) Inside PATTERN is used when W/B is controlled. Connect to auto controller or push control R/C IN-START => Enter the mode of White-Balance, the pattern will come out.

* Auto adjustment Map(RS-232C)

*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).

2.1 In case of PDP: Measure and adjust after sticking the Color Analyzer (CA-100+, CA-210 ) to the side of the module.

2.2 In case of LCD: Adhere closely the Color Analyzer ( CA-210 ) 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 15 minutes.

- In case of PDP, keep white pattern using inside pattern.

- In case of LCD, using ‘no signal’ or ‘full white pattern’ or the others, check the back light on

Communication Type LT75A

Protocol Baud Rate Data bit Stop bit Parity

115200 8 1 None

Protocol Index Cmd 1 Cmd 2 Data

Min Value Max Value

Setting R-Gain_Normal j a 00(00) 128(80)

G-Gain_Normal j b 00(00) 128(80)

B-Gain_Normal j c 00(00) 128(80)

R-Gain_Warm j d 00(00) 128(80)

G-Gain_Warm j e 00(00) 128(80)

B-Gain_Warm j f 00(00) 128(80)

R-Gain_Cool j g 00(00) 128(80)

G-Gain_Cool j h 00(00) 128(80)

B-Gain_Cool j i 00(00) 128(80)

R-Offset_Normal l j 00(00) 128(80)

G-Offset_Normal l k 00(00) 128(80)

B-Offset_Normal l l 00(00) 128(80)

R-Offset_Warm l m 00(00) 128(80)

Offset_Warm l n 00(00) 128(80)

B-Offset_Warm l o 00(00) 128(80)

R-Offset_Cool l p 00(00) 128(80)

G-Offset_Cool l q 00(00) 128(80)

B-Offset_Cool l r 00(00) 128(80)

Inside Pattern signal w b 00 W/B Adjust start

Inside Pattern signal w b 10 Inside Pattern

Inside Pattern signal w b ff W/B Adjust end

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