LG 42LC7D-AB Schematic

LCD TV

SERVICE MANUAL

CAUTION

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

CHASSIS : LB73A

MODEL : 42LC7D 42LC7D-AB

website:http://biz.LGservice.com

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CONTENTS

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

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

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

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

TROUBLE SHOOTING ............................................................................13

BLOCK DIAGRAM...................................................................................19

EXPLODED VIEW .................................................................................. 21

REPLACEMENT PARTS LIST ............................................................... 23

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 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 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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1. Application range

This specification is applied to LB73A chassis.

2. Requirement for Test

Testing for standard of each part must be followed in below condition.

(1) Temperature : 25°C±5°C(77±9°F) (2) Humidity : 65%±10% (3) Power : Standard input voltage (AC 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

3.1 Performance : LGE TV test method followed

3.2 Demanded other specification

Safety : CB Specification EMC : CISPR 13 Specification

SPECIFICATION

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

4. General TV Specification

No Item Specification Remark

1. Broadcasting system PAL-B/G, DTV : DVB-T

2. Available Channel 1) VHF : 0~5, 5A, 6~9, 9A,10~12

2) UHF : 20 ~ 75

3) CATV: 02 ~ 44

4) DTV : 06 ~9, 9A, 10~12, 27 ~ 69

3. Tuner IF 1) PAL : 38.90MHz(Picture),

34.40MHz(Sound)

2) DVB-T : 36.125MHz

4. Input Voltage AC 240 V, 50Hz Maker : LGE

5. LCD Module 37" : LC370WX3-SLA1 WXGA Maker : LG Philips LCD 42" : LC420WX6-SLA1 WXGA

6. Aspect ratio 16:9 (wide)

7. Operating Temperature 0 40 deg

8. Operating Humidity 85 %

9. Storage Temperature -20 60 deg

10. Storage Humidity 85 %

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5. Chroma & Brightnes

No Item Min Typ Max Unit Remark

1. White peak Brightness 360 450 cd/m

HDMI input, full white, Video Black level=Hight

2. Contrast Ratio 600 : 1 800 : 1

3. Brightness uniformity 1.3 Refer to LCD spec.

4. Color coordinate RED X 0.633 ± 0.03

Y 0.339 ± 0.03

GREEN X 0.286 ± 0.03

Y 0.610 ± 0.03

BLUE X 0.147 ± 0.03

Y 0.065 ± 0.03

WHITE X 0.272 ± 0.03

Y 0.278 ± 0.03

5. Viewing Angle(H/V) 178 CR > 10

6. Color Temperature Cool 8,300 9,300 10,300

Warm 10,000 11,000 12,000 Medium 5,500 6,500 7,500

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

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

1. 720*576 15.625 50.00 13.50 SDTV576i

2. 720*576 31.25 50.00 27.00 SDTV 576p

3. 720*480 15.73/15.75 59.94/60.00 13.50 SDTV 480i

4. 720*480 31.47/31.50 59.94/60.00 27.00 SDTV 480p

5. 1280*720 44.96/45.00 59.94/60.00 74.25 HDTV 720P

6. 1280*720 37.50 50.00 74.25 HDTV 720P

7. 1920*1080 33.72/33.75 59.94/60.0 74.25 HDTV 1080i

8. 1920*1080 28.125 50.00 74.25 HDTV 1080i

9. 1920*1080 67.432/67.500 59.939/60 148.5 HDTV 1080P

10. 1920*1080 56.25 50 148.5 HDTV 1080P

11. 1920-1080 26.97/27.000 23.97/24.000 74.25 HDTV 1080P

12. 1920*1080 33.71/33.75 29.97/30.000 74.25 HDTV 1080P

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8. HDMI/DVI input (DTV / PC)

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

DTV

1. 720*576 31.25 50.00 27.00 SDTV 576p

2. 720*480 31.47/31.50 59.94/60.00 27.00 SDTV 480p

3. 1280*720 44.96/45.00 59.94/60.00 74.25 HDTV 720P

4. 1280*720 37.50 50.00 74.25 HDTV 720P

5. 1920*1080 33.72/33.75 59.94/60.0 74.25 HDTV 1080i

6. 1920*1080 28.125 50.00 74.25 HDTV 1080i

7. 1920*1080 67.432/67.500 59.939/60 148.5 HDTV 1080P

8. 1920*1080 56.25 50 148.5 HDTV 1080P

9. 1920*1080 26.97/27.000 23.97/24.000 74.25 HDTV 1080P

10. 1920*1080 33.71/33.75 29.97/30.000 74.25 HDTV 1080P PC

11. 640*480 31.469 59.94 25.17 VESA(VGA)

12. 640*480 37.861 72.80 31.50 VESA(VGA)

13. 640*480 37.500 75.00 31.50 VESA(VGA)

14. 800*600 35.156 56.25 36.00 VESA(SVGA)

15. 800*600 37.879 60.31 40.00 VESA(SVGA)

16. 800*600 48.077 72.18 50.00 VESA(SVGA)

17. 800*600 46.875 75.00 49.50 VESA(SVGA)

18. 1024*768 48.363 60.00 65.00 VESA(XGA)

19. 1024*768 56.476 70.06 75.00 VESA(XGA)

20. 1024*768 60.023 75.02 78.75 VESA(XGA)

21. 1280*768 47.776 59.870 79.5 CVT(WXGA)

22. 1360*768 47.720 59.799 84.750 CVT(WXGA)

23. 1366*768 47.13 59.65 72.00

7. RGB input (PC)

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

1. 640*350 31.468 70.09 25.17 EGA

2. 640*480 31.469 59.94 25.17 VESA(VGA)

3. 640*480 37.861 72.80 31.50 VESA(VGA)

4. 640*480 37.500 75.00 31.50 VESA(VGA)

5. 800*600 35.156 56.25 36.00 VESA(SVGA)

6. 800*600 37.879 60.31 40.00 VESA(SVGA)

7. 800*600 48.077 72.18 50.00 VESA(SVGA)

8. 800*600 46.875 75.00 49.50 VESA(SVGA)

9. 1024*768 48.363 60.00 65.00 VESA(XGA)

10. 1024*768 56.476 70.06 75.00 VESA(XGA)

11. 1024*768 60.023 75.02 78.75 VESA(XGA)

12. 1280*768 47.776 59.870 79.5 CVT(WXGA)

13. 1360*768 47.720 59.799 84.750 CVT(WXGA)

14. 1366*768 47.13 59.65 72.00

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ADJUSTMENT INSTRUCTION

1. Application Object

These instructions are applied to all of the 37"/42" LCD TV, LB73A

Chassis

2. Notes

(1) Because this is not a hot chassis, it is not necessary to use

an isolation transformer. However, the use of isolation

transformer will help protect test equipment. (2) Adjustments must be done in the correct order. (3) The adjustments must be performed in the circumstance of

25±5°C of temperature and 65±10% of relative humidity if

there is no specific designation. (4) The input voltage of the receiver be must kept 220V~,

60Hz when adjusting. (5) The receiver must be operational for about 15 minutes

prior to the adjustments.

* Perform preliminary operation after receiving White Pattern. * White Pattern entry method

- Turn the power on.

- 100% FULL WHITE PATTERN appears if pressing the Power on key of adjustment remote control.

* Set is activated HEAT RUN without signal generator in this

mode.

Notice) If you turn on a still screen more than 20 minutes (Especially Digital pattern, Cross Hatch Pattern), an afterimage may occur in the black level part of the screen.

3. CPLD Download

(1) Test Equipment: PC, Jig for download (2) Connect the power of VSC B/D. (3) Execute download program of PC. (4) After executing the hot key on the Programmer, click

‘program icon’.

(5) End after confirming.

4. MST3361M-Set Adjustment

4-1. Synopsis

MST3362M-Set adjustment to set the black level and the Gain of optimum with an automatic movement from the analog => digital converter.

4-2. Test Equipment

Service R/C, MSPG-925 Pattern Generator (480i, 1080i 60Hz Color Bar Pattern output will be possible and the output level will accurately have to be revised with

0.7±0.1V

P-P

)

4-3. Adjustment

(1) How to adjustment the Component1

1) Select Component1 as the input with Color Bar Pattern in 480i 60Hz mode and select ‘Component1’ on screen.

2) After receiving signal for at least 1 second, press the ADJ Key on the Service R/C to enter the ‘Ez - Adjust’ and select the ‘1. ADC 480i Comp1’. Pressing the Vol+ Key to adjust the component1.

3) When the adjustment is over, 'Component1 Adjustment OK’ is displayed. If the adjustment has errors, 'Component1 Adjustment Failed! Try Again!’ is displayed.

4) Readjust after confirming the case Pattern or adjustment condition where the adjustment had errors.

5) After adjustment is complete, exit the adjustment mode by pressing the ADJ KEY.

(2) How to adjustment the Component2, RGB

1) Select Component2, RGB-DTV as the input with Color Bar Pattern in 1080i 60Hz mode and select ‘Component2’ on screen.

2) After receiving signal for at least 1 second, press the ADJ Key on the Service R/C to enter the ‘Ez - Adjust’ and select the ‘2. ADC 1080i Comp2/RGB’. Pressing the Vol+ Key to adjust the component2.

3) When the adjustment is over, 'Component2 Adjustment OK’ is displayed. If the adjustment has errors, 'Component2 Adjustment Failed! Try Again!’ is displayed. and If the adjustment has errors, 'RGB Adjustment Failed! Try Again!’ is displayed.

4) Readjust after confirming the case Pattern or adjustment condition where the adjustment had errors.

5) After adjustment is complete, exit the adjustment mode by pressing the ADJ KEY.

<Fig. 1> Connection Diagram of CPLD Download

<Fig. 2> Adjustment Pattern: 480i/1080i 60Hz Colot Bar Pattern

LCD TV SET

5. Video(uPD)-Set adjustment

5-1. Synopsis

This is a adjustment to reduce the color difference of video signal Main/Sub Display.

5-2. Required Equipment

Service R/C, MSPG-925 Pattern Generator.

5-3. Adjustment

(1) How to adjustment the uPD PAL

1) Select AV1 as the input with 100% 8 Color Bar Pattern in PAL mode and select ‘AV1’ on screen.

2) After receiving signal for at least 1 second, press the ADJ Key on the Service R/C to enter the ‘Ez - Adjust’ and select the ‘3. uPD PAL(Main&Sub)-Set’. Pressing the Vol+ Key to adjust the uPD PAL.

3) When the adjustment is over, 'uPD64015 PAL Main Adjustment OK’ and ‘uPD64015 PAL Sub Adjustment OK’ is displayed. If the adjustment has errors, 'uPD64015 PAL Main Error!’ or 'uPD64015 PAL Main Error!’ is displayed.

4) Readjust after confirming the case Pattern or adjustment condition where the adjustment had errors.

5) After adjustment is complete, exit the adjustment mode by pressing the ADJ KEY.

(2) How to adjustment the uPD NTSC

1) Select AV1 as the input with 100% 8 Color Bar Pattern in NTSC mode and select ‘AV1’ on screen.

2) After receiving signal for at least 1 second, press the ADJ Key on the Service R/C to enter the ‘Ez - Adjust’ and select the ‘4. uPD NTSC(Main&Sub)-Set’. Pressing the Vol+ Key to adjust the uPD NTSC.

3) When the adjustment is over, 'uPD64015 NTSC Main Adjustment OK’ and ‘uPD64015 NTSC Sub Adjustment OK’ is displayed. If the adjustment has errors, 'uPD64015 NTSC Main Error!’ or 'uPD64015 NTSC Main Error!’ is displayed.

4) Readjust after confirming the case Pattern or adjustment condition where the adjustment had errors.

5) After adjustment is complete, exit the adjustment mode by pressing the ADJ KEY.

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

This is the function that enables “Plug and Play".

6-1. Required Test Equipment

(1) PC, Jig for adjusting DDC.

(PC serial to D-sub Connection equipment)

(2) DVI to HDMI Connector.

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Analog EDID

D-sub to D0sub

HDMI EDID

DVI-D to HDMI or HDMI to HDMI

(Fig. 3) Adjust Pattern :100% 8 Color Bar Pattern

6-2. Setting of Device

6-3. EDID DATA

6-3-1. 37LC7D-AB (1) EDID DATA PORT1 for HDMI

(2) EDID DATA PORT2 for HDMI

(3) EDID DATA for RGB

6-3-2. 42LC7D-AB (1) EDID DATA PORT1 for HDMI

(2) EDID DATA PORT2 for HDMI

(3) EDID DATA for RGB

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000FFFFFFFFFFFF001E6D01000101 0101 10 0E 10 01 03 18 73 41 96 0A CF 74 A3 57 4C B0 23 20 09 48 4C AF CE 00 01 01 01 01 01 01 01 01 01 01 30 01 01 01 01 01 01 1B 21 50 A0 51 00 1E 30 48 88 40 35 00 BC 88 21 00 00 1C F3 39 80 18 71 38 2D 40 50 58 2C 45 00 C4 8E 21 00 00 1E 00 00 00 FD 00 38 60 4B 1F 44 0F 00 0A 20 20 20 20 20 20 00 00 00 FC 70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 00 DE

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000FFFFFFFFFFFF001E6D01000101 0101 10 0E 10 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23 20 09 48 4C 2F CE 00 31 40 45 40 61 40 01 01 01 01 30 01 01 01 01 01 01 01 1D 00 72 51 D0 1E 20 6E 28 40 55 00 C4 8E 21 00 00 1E 01 1D 80 18 71 1C 16 20 50 58 2C 25 00 C4 8E 21 00 00 9E 00 00 00 FC 00 4C 60 47 20 54 56 0A 20 20 20 20 20 20 20 00 00 00 FD 70 00 38 4B 1F 3C 09 00 0A 20 20 20 20 20 20 01 59

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7. Adjustment of White Balance

7-1. Required Equipment

(1) Color analyzer (CA-210 or similar product) (2) Automatic adjustor (with automatic adjustment hour

necessity and the RS-232C communication being possible)

7-2. Connection Diagram of Equipment

for Measuring (Automatic Adjustment)

7-3. Process of automatic adjustment

(1) As using the white pattern for adjustment the inner part,

HDMI connection need not. But as lower part, the RS-232C Command is used.

Wb 00 00 start of automatic adjustment the white balance. Wb 00 10 Start of gain adjustment.(inside pattern) Ja 00 ff Adjustment Date. Jb 00 c0 ... Wb 00 1f Ending gain adjustment. As occasion demands , adjust the offset. ( Wb 00 20(Start) , Wb 00 2f(end))

Caution) When you adjust automatically, RS-232C Command is used. * Baud Rate : 115200

[ RS-232C Command (Automatic Adjustment)

- Operate the automatic adjustment by using ‘power only’ key on service remote control. And set the Baud Rate to 115200.

- It must start to “wb 00 00”, complete to “wb 00 ff”.

- Adjust offset.

7-4. Adjustment of White Balance

(Passivity Adjustment)

Operate Zero Calibration of the CA-210.

Manual adjustment is also possible by the following sequence.

(1) Enter to ‘7. White-Balance’ by pressing the ADJ key on the

service remote control.

(2) Select Test Pattern White with ADJ key and HEAT RUN at

least 15 minutes.

(3) Select picture control condition to ‘Dynamic’.

Stick the sensor on center of screen. And select ‘6.WhiteBalance of ‘Ez- Adjust’ with ADJ key on service remote control and Enter to adjustment mode by pressing right key(

G).

(4) Adjust with Volume ± key.

- Value of bright : High Level -> 216gray

[Cool]

Color coordinates : X; 0.272±0.015 Y; 0.278±0.015 Color temperature: 12000°K ±1000°K dUV: ±0dUV

[Medium]

Color coordinates : X; 0.285±0.015 Y; 0.293±0.015 Color temperature: 9300°K±1000°K dUV: ±0dUV

[Warm]

Color coordinates : X; 0.313±0.015 Y; 0.329±0.015 Color temperature: 6500°K±1000°K dUV: ±3dUV

(5) After adjustment is completed, move to ‘Ez-Adjust’ by

pressing

A key exit the adjustment mode by pressing the

ADJ key.

R Gain

G Gain

B Gain

R Offset

G Offset

B Offset

CENTER

(DEFAULT)(Hex)

Min

Max

Cool

Mid

Warm

RS-232C COMMAND

[CMD ID DATA]

Cool

Mid

Warm

216 FULL WHITE

COLOR

ANALYZER

TYPE; CA-210

HDMI signal input

LCD TV part

Window

MSPG-925 series

- 13 -

TROUBLESHOOTING

Check TU800 Pin8(Video output)

Can you see the normal signal?

YES

Could you measure voltage of TU800 & IIC

lines?

Are they all normal?

You should replace TUNER.

YES

Check the input(Pin63) of AV switch(IC603).