LG 47LC7DF Schematic

LCD TV

SERVICE MANUAL

CHASSIS : LA73A

MODEL : 47LC7DF

CAUTION

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

47LC7DF-UB

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CONTENTS

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

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

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

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

TROUBLE SHOOTING & BLOCK DIAGRAM ........................................17

EXPLODED VIEW .................................................................................. 43

REPLACEMENT PARTS LIST ............................................................... 45

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

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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

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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

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IC Remove/Replacement

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

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SPECIFICATION

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

4. General Specification(TV)

No. Item Specification Remark

1. Receiving System ATSC/64 & 256 QAM/ NTSC-M

2. Available Channel 1) VHF : 02~13

2) UHF : 14~69

3) DTV : 02-69

4) CATV : 01~135

5) CADTV : 01~135

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

4. Market NORTH AMERICA

5. Screen Size 47 inch Wide(1920 x 1080)

6. Aspect Ratio 16:9

7. Tuning System FS

8. LCD Module LC470WU1-SLB2

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

2) Humidity : ~ 80 %

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

2) Humidity : ~ 85 %

1. Application Range.

This spec sheet is applied to the 47" LCD TV used LA73A chassis.

2. Especificación

Each part is tested as below without special appointment

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

2.2 Relative Humidity : 65±10%

2.3 Power Voltage : Standard input voltage (100~240V@ 50/60Hz)

• Standard Voltage of each products is marked by models

2.4 Specification and performance of each parts are followed each drawing and specification by part number in accordance with BOM .

2.5 The receiver must be operated for about 20 minutes prior to the adjustment.

3. Test method

3.1 Performance : LGE TV test method followed.

3.2 Demanded other specification Safety : UL, CSA, IEC specification

3.3 EMC : FCC, ICES, IEC specification

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5. Chrominance & Luminance Specification

No Item Min Typ Max Unit Remark

1. White peak brightness 400 550 cd/m

2. Contrast ratio cd/m2N/A

3. Brightness uniformity 80 % Full white

4. Color coordinate RED X 0.638 +/- 0.03

Y 0.340 +/- 0.03

GREEN X 0.279 +/- 0.03

Y 0.611 +/- 0.03

BLUE X 0.146 +/- 0.03

Y 0.062 +/- 0.03

WHITE X 0.272 +/- 0.03

Y 0.278 +/- 0.03

5. Color coordinate uniformity N/A

6. Contrast ratio 600:1 800:1

7. Color Temperature Cool 11,000 <Test Signal>

Medium 9,300

HDMI input, With 16-gray pattern

Warm 6,500 6thbar from right

8. Color Distortion, DG 10.0 %

9. Color Distortion, DP 10.0 deg

10. Color S/N, AM/FM 43.0 dB

11. Color Killer Sensitivity -80 dBm

6. Mechanical specification

No. Item Content Unit Remark

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

Dimension Before Packing 1144.5 331 825.6 mm With Stant

After Packing 1230 410 912 mm

2. Product Only SET 37.5 Kg

With BOX 44.7 Kg

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Peak & average Brightness & Contrast measure standard specification

- White Peak brightness measure specification

1) In non-impressed condition, measure peak brightness displayable as much as possible LCD module.

2) Measuring instrument: CA-110 or a sort of Color Analyzer.

3) Pattern Generator : VG-828 or a sort of digital pattern generator (displayable Full White & 1/25 White Window pattern)

4) Measure condition

- Test pattern: in center, 1/5(H)x1/5(V) of Window Pattern (white pattern in non-impressed condition)

- SET condition : Contrast & Brightness Level 100%

- Environment condition : Dark room in the non outside light

- Video menu option condition

5) Measurement

- Do heat-run LCD module at 30minutes in normal temperature (25°C) by using full white pattern of 15% signal level(38 gray level).

- Impress test pattern signal in 1/5(H)x1/5(V) White Window of 100%(255Gray Level)

- measure 3 times brightness of central white window, and mark peak brightness in max brightness degree

- measure the same condition in video signal /RGB signal.

Average Brightness measure specification

1) Impress 100%(255Gray Level) full white pattern at the same peak brightness measurement.

2) Measure average brightness in 9 points.

Contrast ratio measure specification

1) Test display signal : 30x30 dots White Window signal & all Black Raster signal

2) Dark room measure condition : Using touch type Color analyzer CA-100 Dark room in the non outside light

3) Bright room measure condition : In bright room of 150Lx illumination in the panel surface, locate a source of light on the above 45°of the panel surface.

4) Measure method

- In standard test condition, impress 30x30 dots White Window Pattern signal .

Measure center peak brightness degree Lw of white window

- Impress black Raster signal as contrast ratio measurement signal.

Measure black brightness degree Lb of PDP central Calculate the following numerical formula. Contrast ratio = Lw / Lb

* If it does not use Prior measurement, use generally simple test measurement.

The Correct measure specification is followed by IEC61988-2/CD, JAPAN EIAJ-2710

Signal Picture Mode XD Black Level

RF NTSC-M USER1 Off N/A

AV NTSC-M USER1 Off Low

Component 720P USER1 Off N/A

RGB 1024x768 USER1 N/A N/A

HDMI DTV 720P USER1 Off High

1 4 7

2 5 8

3 6 9

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7. Component Video Input (Y, PB, PR)

No.

Specification

Remark

Resolution H-freq(kHz) V-freq(Hz)

1. 720*480 15.73 60 SDTV ,DVD 480I

2. 720*480 15.73 59.94 SDTV ,DVD 480I

3. 720*480 31.47 60 SDTV 480P

4. 720*480 31.47 59.94 SDTV 480P

5. 1280*720 45.00 60.00 HDTV 720P

6. 1280*720 44.96 59.94 HDTV 720P

7. 1920*1080 33.75 60.00 HDTV 1080I

8. 1920*1080 33.72 59.94 HDTV 1080I

9. 1920*1080 67.500 60 HDTV 1080P

10. 1920*1080 67.432 59.939 HDTV 1080P

11. 1920*1080 27.000 24.000 HDTV 1080P

12. 1920*1080 26.97 23.94 HDTV 1080P

13. 1920*1080 33.75 30.000 HDTV 1080P

14. 1920*1080 33.71 29.97 HDTV 1080P

8. RGB PC

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

PC DDC

1. 640*350 31.468 70.09 25.17 EGA X

2. 720*400 31.469 70.08 28.32 DOS O

3. 640*480 31.469 59.94 25.17 VESA(VGA) O

4. 640*480 37.861 72.80 31.50 VESA(VGA) O

5. 640*480 37.500 75.00 31.50 VESA(VGA) O

6. 800*600 35.156 56.25 36.00 VESA(SVGA) O

7. 800*600 37.879 60.31 40.00 VESA(SVGA) O

8. 800*600 48.077 72.18 50.00 VESA(SVGA) O

9. 800*600 46.875 75.00 49.50 VESA(SVGA) O

10. 1024*768 48.363 60.00 65.00 VESA(XGA) O

11. 1024*768 56.476 70.06 75.00 VESA(XGA) O

12. 1024*768 60.023 75.02 78.75 VESA(XGA) O

13. 1280*768 47.776 59.870 79.5 CVT(WXGA) O

14. 1280*768 60.289 74.893 102.25 CVT(WXGA) O

15. 1360*768 47.712 60.015 85.50 VESA (WXGA) O

16. 1280*1024 63.981 60.020 108.00 VESA (SXGA) O

17. 1280*1024 79.976 75.025 135 VESA (SXGA) O

18. 1600*1200 75.00 60.00 162 VESA (UXGA) O

19 1920*1080 67.5 60 148.5 HDTV 1080P O

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9. HDMI Input (PC/DTV)

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

PC DDC

1 640*350 31.468 70.09 25.17 EGA X

2 720*400 31.469 70.08 28.32 DOS _

3 640*480 31.469 59.94 25.17 VESA(VGA) _

4 640*480 37.861 72.80 31.50 VESA(VGA) _

5 640*480 37.500 75.00 31.50 VESA(VGA) _

6 800*600 35.156 56.25 36.00 VESA(SVGA) _

7 800*600 37.879 60.31 40.00 VESA(SVGA) _

8 800*600 48.077 72.18 50.00 VESA(SVGA) _

9 800*600 46.875 75.00 49.50 VESA(SVGA) _

10 1024*768 48.363 60.00 65.00 VESA(XGA) _

11 1024*768 56.476 70.06 75.00 VESA(XGA) _

12 1024*768 60.023 75.02 78.75 VESA(XGA) _

13 1280*768 47.776 59.870 79.5 CVT(WXGA) _

14 1360*768 47.712 60.015 85.50 VESA (WXGA) _

15 1280*1024 63.981 60.020 108.00 VESA (SXGA) _

16 1280*1024 79.976 75.025 135 VESA (SXGA) _

17 1600*1200 75.00 60.00 162 VESA (UXGA) _

18 1920*1080 67.5 60 148.5 HDTV 1080P _

DTV

1 720*480 31.47 60 SDTV 480P

2 720*480 31.47 59.94 SDTV 480P

3 1280*720 45.00 60.00 HDTV 720P

4 1280*720 44.96 59.94 HDTV 720P

5 1920*1080 33.75 60.00 HDTV 1080I

6 1920*1080 33.72 59.94 HDTV 1080I

7 1920*1080 67.500 60 HDTV 1080P

8 1920*1080 67.432 59.939 HDTV 1080P

9 1920*1080 27.000 24.000 HDTV 1080P

10 1920*1080 26.97 23.94 HDTV 1080P

11 1920*1080 33.75 30.000 HDTV 1080P

12 1920*1080 33.71 29.97 HDTV 1080P

10. General specifications

No Item Specification Unit Remark

1 Active Screen Size 46.96 inches(1192.87mm) mm

2 Outline dimension 1096.0(H)x640.0(V)x481(D) mm

3 Pixel Pitch 0.5415x0.5415x RGB mm

4 Pixel Format 1920 horiz by 1080 vert. RGB Stripe arrangement

5 Color Depth 8-bit / 16.7M Color

6 Luminance, White 550 cd/m2

7 Power Consumption Total 230.56 Watt

8 Weight 20.0Kg

9 Display Operating Mode Transmissive Mode, Normally Black

10 Surface Treatment

Hard Coating (3H) Anti-glare treatment of the front polarizer

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9. Customer Menu Setup (Shipment Condition)

No Item Condition Remark

1. Input Mode TV02CH

2. Volume Level 30

3. Mute Off

4. Aspect Ratio 16:9

5. Video EZ Picture Daylight

Contrast 100

Brightness 40

Color 70

Sharpness 70

Tint 0

Color-temperature Cool

XD Auto(On)

Advanced Cinema3:2 Mode(Off)

Black Level(RF,HDMI=>Low),(AV=>High)( RGB-PC,Component=>Disable)

6. Audio Audio Language Off

EZ Sound Normal

Balance 0

Bass 50

Front Surround Off

TV Speaker On

7. Timer Auto clock Off

Manual Clock Off

Off Timer Off

On Timer Off

Sleep Timer Off

Auto Off Off

8. Option Aspect Ratio 16:9

Caption/Text Off

Caption Option Set By Program

Language English

Simplink On

9. Lock Lock System Off

Set password On

(Default:0000)

Block channel None

Movie Rating Off

TV Rating-Children None

TV Rating-General None

Input Block Off

10. Channel Memory RF : 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 30, 51, 63

CATV : 15, 16, 17

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ADJUSTMENT INSTRUCTION

1. Scope

These instructions are applied to all of the LCD TV, LA73A Chassis.

2. Designation

2.1 Because this chassis is a non-charge type chassis of

power supply insulation, it does not require an insulation type transformer. But it is preferable to use an insulation type transformer between the power supply line and the chassis input side to operate it before the adjustment.

2.2 The adjustment must be done in the accurate order. But it

can be changed considering the mass production capability.

2.3 Unless specified specially, the adjustment must be done

in an environment with the surrounding temperature of 25 ±5°C and relative humidity of 65 ±10%.

2.4 The input voltage of the receiver during the adjustment

must be maintained at 220V, 60Hz.

2.5 Unless specified otherwise, the receiver must be pre-

operated for 15 minutes before the adjustment.

O The pre-operation must be done after receiving 100%

White Pattern (06CH).

(Or 8. Test Pattern condition of Ez – Adjust)

O How to enter White Pattern

A. Press the POWER ON KEY on the adjustment R/C. B. Or press the ADJ KEY on the adjustment R/C to enter

Ez – Adjust And select 10. Test Pattern using the CH + / - KEY and then select White using the arrow keys to display the 100% FULL WHITE PATTERN.

* In this mode, you can heat run the set without separate

signal generator.

Caution) When you keep the still screen on for more than 20

minutes (Especially for internal Digital pattern (13 CH), Cross Hatch Pattern (09CH) with higher black/white contrast), be careful not to create residual image on the black level part.

3. Board adjustment

- Adjust 480i Comp1

- Adjust 1080p Comp1/RGB

- Adjust RF and Video

4. Adjustment method using RS-232C

Adjust the 3 board adjustment items of 3 using the RS-232C

according to the "4.1.2 Adjustment order".

4-1. Necessary details before adjustment

- ad 00 00 Enter ADC adjustment mode.

- kb 00 01 Switch RF input (Input is not switched)

- ad 00 10 Adjust RF and Video (Input is switched and adjusted)

- kb 00 04 Switch component1 input (Input is not switched)

- ad 00 10 Adjust 480i Comp1 (Input is switched and adjusted)

- kb 00 06 Switch RGB-DTV input (Actual input is not switched)

- ad 00 10 Adjust 1080p Comp1/RGB (Input is switched and adjusted)

- ad 00 90 Complete adjustment

4-2. Auto adjustment of RF and Video

4.2.1 Introduction

This is the adjustment to reduce the color difference of main/sub screen of RF and video signal.

4.2.2 Adjustment method

A. Connect the Video Signal Generator (Master) to TV AV

input terminal with AV output. At this time, when you enter the input pattern as Model : 201(NTSC-M) , Pattern : 33(100% color Bar), the following video is displayed on the screen

Note: When the video is shown as follows showing black patterns from the left, it cannot be adjusted

Model: 201(NTSC-M), Pattern: 33(100% color Bar)

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In this case, first press the Rev button of Video Signal Generator (Master), to generate the white pattern to be displayed

from the left.

Because the above pattern can differ by the model and pattern for each device, you must check the pattern first.

B. When the receiving signal is confirmed after inputting the

internal signal, press the ADJ KEY on the adjustment R/C to enter ‘EZ-ADJUST’. Select ‘5.Adjust RF and Video’ and

press the right key (G) to enter the adjustment mode.

C. When you enter the adjustment mode, the video is

automatically set to TV 2CH and the following window is displayed.

D. When the adjustment is completed, a message saying ‘RF

Configuration Success’ is displayed. If the adjustment has failed, a message saying ‘RF Configuration Error’ is displayed.

E. When the automatic adjustment of RF signal is completed,

it is automatically switched to the Video Mode as shown in the above picture, and automatic adjustment for Video Mode is done. When the automatic adjustment is completed, a message saying ‘Video Configuration Success’ is displayed. If the adjustment has failed, a message saying ‘Video Configuration Error’ is displayed..

O Check RS-232C operation

Press the Instart of adjustment R/C to enter the 7.Baud Rate menu and set the Baud Rate to 115200 to check the 232-C operation

5. Automatic adjustment of Component 480i/1080p RGB 1080p

5.1 Introduction

The Component 480i/1080p RGB 1080p adjustment sets the optimal black level and gain automatically from the analog => digital converter, and is the function to correct the RGB deviation

5.2 Using device

Adjustment remote controller, 801GF (802B, 802F, 802R) or MSPG925FA Pattern Generator (480i/1080P Horizontal 100% Color Bar Pattern output must be possible and output level must be adjusted accurately to

0.7±0.1Vp-p.)

Because the above pattern can differ by the model and pattern for each device, you must check the pattern first.

(Adjustment pattern : 480i / 1080P 60Hz Pattern)

5.3 480i Comp1, 1080p Comp1/RGB adjustment method

A. ADC 480i component1 adjustment

- Check Component1 connected condition from the using device.

- (MSPG-925FA : (model :209 , pattern :65 )

B. Input Component 100% Horizontal Color Bar Pattern

(HozTV31Bar) of 480i Mode that is supported, select the input to Component1 and select the video to ‘Normal’.

C. Wait for more than 1 second after receiving the signal and

then press the ADJ KEY on the adjustment R/C to enter ‘Ez – Adjust’. Select ‘3. ADC 480i Comp1’ and press the Enter KEY to make the automatic adjustment.

D. When the adjustment is normally completed, a message

saying "ADC Component1 Success" is displayed.

E. When the adjustment is not normally completed, a message

saying ‘ADC Component1 480i Fail’ is displayed. When the component is not connected, a message saying ‘Component1 Not Connected’, when the input format is not 480i, a message saying ‘Not Valid Format’ and when the input signal is not coming out, a message saying ‘Check Signal Status’ is displayed for 1 second.

F. ADC 1080P Component1/RGB adjustment

- Check the Component1, RGB connected condition from the using device.

- (MSPG-925FA : => model :225 , pattern :65 )

G. Input Component 100% Horizontal Color Bar Pattern

(HozTV31Bar) of 480i Mode that is supported, select the input to Component1 and select the video to ‘Normal’.

H. Wait for more than 1 second after receiving the signal and

then press the ADJ KEY on the adjustment R/C to enter ‘Ez – Adjust’. Select ‘4. ADC 1080P Comp1/RGB’ and press the Enter KEY to make the automatic adjustment for component 1 first.

I. When the adjustment is normally completed, a message

saying "ADC Component1 Success" is displayed, and when the adjustment is not normally completed, a message saying ‘ADC Component1 1080P Fail’ is displayed.

J. After the Component1 adjustment is completed, it is

automatically switch to RGB-DTV Mode to start RGB adjustment. When the adjustment is normally completed, a message saying "ADC RGB 1080P Success" is displayed.

K. When the adjustment is not normally completed, make the

adjustment again after checking the pattern or adjustment condition. The error message is as E.

L. When the adjustment is completed, press the ADJ KEY to exit.

6. EDID(The Extended Display Identification Data)/DDC (Display Data Channel) Download

6.1 Introduction

This has been established by VESA and is the function created to "Plug and Play" by making the computer reconfigure user environment through communication with the monitor automatically without having the user set commands directly to the PC or the monitor so that the user can use it immediately.

When writing EDID, use the DDC2B protocol.

6.2 HDMI EDID Data input

1) Using device a. Jig for PC, DDC adjustment (PC serial to D-sub connection

device) b. DDC recording S/W (EDID Data Write & Read) c. D-Sub terminal d. Separate HDMI Cable connecting JIG is necessary

2) Adjustment preparation and device configuration e. Configure as Fig., and turn on the PC f. Turn on the JIG. g. Run the DDC recording S/W (EDID Data Write & Read).

(Execute in DOS mode)

- 14 -

LCD TV SET

(or Digital Board)

Device configuration diagram for HDMI EDID Data input

- 15 -

6.3 EDID Data for LA73A

- 16 -

7. White Balance adjustment

7-1. Using device

A. Color Analyzer : CA-210 (CH 9)

When adjusting the LCD white balance, use CS-1000 as the color analyzer (CA-210) and channel 9 corrected of Matrix (corrected for White, Red, Green, Blue) and the adjustment must be done in accordance with the White balance adjustment coordinate.

B. Automatic adjuster (Necessary for automatic adjustment, must

be able to communicate with RS-232C, Baud Rate : 115200)

C. Video Signal Generator MSPG-925F 720p, 216Gray(Model :

217, Pattern 78

7-2. Measuring device connection diagram

(for automatic adjustment)

=> Connection diagram for internal pattern

=> Connection diagram for HDMI input

7-3. White Balance adjustment method

Basically it uses the internal pattern but when internal pattern is not possible, you can select HDMI input for adjustment. Through the option at the most bottom part of the Ez Adjust Menu 7.White Balance menu, you can select NONE, INNER and HDMI, and the default is set to INNER. When the adjustment cannot be done with the internal pattern, you can select HDMI input for adjustment.

For manual adjustment, press the ADJ KEY of the adjustment R/C to enter Ez Adjust 7.White-Balance, and the pattern is automatically displayed. (When you set the Option to INNER, the default is always set to INNER)

A. Connect the set according to the internal pattern or HDMI

input in accordance with 4.3.2 measuring device connection diagram.

B. Set the Baud Rate of RS-232C to 115200. It is set to 115200

as default. C. Connect the RS-232C Cable to the set. D. Connect the HDMI Cable to the set. (Limited to the set with

HDMI option) E. Select and adjust the model applicable to LA73A chassis from

the adjuster

Caution) For automatic adjustment, RS-232C Command and

Chassis are commonly applied

7.3.1 White Balance adjustment (For automatic adjustment)

- Execute Power Only Key of the adjustment R/C to execute automatic adjustment. Set the Baud Rate to 115200.

: Always start adjustment with "wb 00 00" and end

adjustment with "wb 00 ff"

: Adjust the offset if necessary.

7-4. White Balance adjustment

(For manual adjustment)

O Using device: CA-210

=> When adjusting the plasma white balance, use CS-1000

as the color analyzer (CA-210) and channel 9 corrected of Matrix (corrected for White, Red, Green, Blue) and the adjustment must be done in accordance with the below White balance adjustment coordinate.

O Manual adjustment must be done in the following order

A. Press the ADJ of adjustment R/C to enter ‘EZ-ADJUST’. B. Select 10.TEST PATTERN using the CH + / - KEY and

press the Enter KEY to execute a heat run for more than 30 minutes.

C. Execute a Zero Calibration for CA-210 and put it at

distance of less than 10Cm from the LCD module surface center during the adjustment.

D. Press the ADJ of adjustment R/C, select ‘7.White-Balance’

of ‘Ez – Adjust’ and enter the adjustment mode using the right key (G).

(When you press the ¢∫ button, the screen enters the full

white internal pattern..)

E. The adjustment is executed in 3 different white balance of

COOL, MEDIUM and WARM.

F. When the white balance is Cool,

Fix B Gain 192, fix R-Cut / G-Cut / B-Cut 64, and use R Gain / G Gain to adjust the High Light. When the white balance is Medium, Fix R Gain 192, fix R-Cut / G-Cut / B-Cut 64, and use G Gain / B Gain to adjust the High Light. When the white balance is Warm Fix R Gain 192, fix R-Cut / G-Cut / B-Cut 64, and use G Gain / B Gain to adjust High Light.

G. Use the +, - key for adjustment. H. When the adjustment is completed, press the OK (Á KEY)

button to move to the Ez –Adjust screen. Press the ADJ KEY to exit the adjustment mode.

Full W h ite Pattern

RS-232C

CA-100+

COLOR

ANALYZER

TYPE; CA-100+

- 17 -

TROUBLESHOOTING & BLOCK DIAGRAM

Con.

LVDS

Con.

1080P

LVDS

1080P

Dual

NTP3000

120Hz

DDR1

16MB

RGB odd

FRC94xyH

63LVD1023

USB (upgrade ready!!)

USB(EMF)

RGB even

Opt.

I2C CH1

I2C CH2

I2C CH3

24C16

24C512

TP_IN1

Flash

VSB

LGDT3303

DDR2

64MBx2

Latch

Latchx2

(NOR 32MB)

LGDT3303

RGB 30bit

USB 1.1

ATI

RGB

MST3361

ATI

X260

HDMI SPDIF

1ADC

1HDMI +

I2C Port0

X260

(# of MPEG decoder)

1ADC

Video

Scaler

Flex Bus

End

Front

Analog

AV2, Y/C2

AV1, Y/C1

CVBS(NT Main)

SIF

I2S

Micom

MTV415

GPIO

Video

1 or 2

Scaler

I2S

SPDIF

I2S

SPDIF

CS8416

I2S

TPA

I2S

PCI

TPB

MSP4450K

MTV415

Audio

Video

AT/NT

Cable

3:1

Demux

3:1

SPDIF

Demux

Alive IC when Standby

Dead IC when Standby

SIF

Air

COMP2

RGB

HDMI1/2/3

AV1

AV2

AV1 / L/R

AV2 / L/R

RGB L/R

COMP2 L/R

COMP1 L/R

MNT Out L/R

Dead IC when Standby

Alive IC when Standby

- 18 -

Dead

(24LC16)

EEPROM

I2C_CH3 (+3.3V_L)

Live

I2C_CH1 (+3.3V_L & +5V_L)

I2C_CH2 (+3.3V_L & +5V_L)

0x50

U-Com

(MTV416)

0x1C

PDP Module

0X21(R)

0X20(W)

CS8416A

0X94

Temp.

(LM75)

Sensor

Port

0X74

Expander

(M62320)

2.5V

0X54

DASP

(NTP3000)

0xD4

FRC94XYH

CH1

0xC2

AT/NT Tuner

CH2

ATI

(X260)

I2C Master

ADC

HDMI

(MSP4450K)

0X9C

(MST3361)

CH3

0X80

Audio

Switch

VSB/QAM

(LGDT3703)

EEPROM

(24LC512)

Main

0X1C

0xA6

- 19 -

9.0V

MC33078

KIA78R09

STMAV335

FRC94XYH

MK3727D

MIC2505

MK3727D

MIC2505

LGDT3703(MAIN)

ISP1504

24C512

AZ1086-1.8

S29GL256

LM75

NTP3000

FAN2, 3

KIA78R09

FAN1

KIA78R09

24C08

MST3369

+5.0V

TEA6420

CS5340

CS4344

AT/NT Tuner

9.0V

MIC2505

AZ1117H-3.3

74LVT16373(2EA)

ISL6549CB

MK3727D

+5V_L

SI3865

Live-on

24C16

MTV416

3.3VST_MICOM

BA033FP-3.3

ICL3232CBNZ

BA033FP-3.3

ICL3232CBNZ

1.2V

1.8V

X260

SC1565-1.8

MIC3910-2.5

MK3727D

HYB18T512(4EA)

1.8V

ISL6549CB

1.8V

CS8416

NTP3000

AZ1117H-1.8

THC63LVD1023

+19.0V

+12.0V

SC1565-2.5

AZ1117H-3.3

KIA7805

PQ05DZ1U

+6.0V

KIA7805

PQ05DZ1U

AZ1085S-3.3

+5.0VST

AZ1085S-1.8

FRC

SC1592-1.0

SC2595-1.0

SC1592-1.0

SC2595-1.0

12.0V

+3.3V_L

SC1565-2.6

HY5DU281622

+3.3V_L

Live Power

Dead Power

Live-on

+ 43 hidden pages

LG 47LC7DF Schematic

Specifications and Main Features

Frequently Asked Questions

User Manual