LG 32LB9D Schematic

LCD TV

SERVICE MANUAL

CAUTION

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

CHASSIS : LB73B

MODEL : 32LB9D 32LB9D-AD

website:http://biz.LGservice.com

Internal Use Only

Only for training and service purposes

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CONTENTS

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

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

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

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

TROUBLE SHOOTING ...........................................................................14

BLOCK DIAGRAM...................................................................................27

EXPLODED VIEW .................................................................................. 32

REPLACEMENT PARTS LIST ............................................................... 34

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

Only for training and service purposes

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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

1.5 Kohm/10W

To Instrument’s exposed METALLIC PARTS

Good Earth Ground such as WATER PIPE, CONDUIT etc.

AC Volt-meter

IMPORTANT SAFETY NOTICE

0.15uF

Only for training and service purposes

- 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 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

Only for training and service purposes

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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.

Only for training and service purposes

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1. Application range

This specification is applied to LB73B 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 : 0~12

2) UHF : 20 ~ 75

3) CATV: 02 ~ 44

4) DTV : 06 ~ 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 Mark : 240V, 50Hz

5 Aspect ratio 16:9 (wide)

6 Screen Size 32 inch Wide (1366 x 768)

7 LCD Module LC320WX4-SLD2

8 Operating Environment Temperature : 0 ~ 40 deg

Humidity : 85%

9 Storage Environment Temperature : -20 ~ 60 deg

Humidity : 85%

Only for training and service purposes

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5. Chroma & Brightness

No Item Min Typ Max Unit Remark

1 White peak Brightness 400 500 cd/m

(Center 1point / Full White Pattern)

2 White average brightness cd/m

N/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 800 : 1 1000 : 1

7 Color Temperature Cool 11000 <Test condition>

Standard 9300 HDMI Input,

Warm 6500 85% Full white pattern

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. 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 SDTV576p

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 26.97/27.00 23.976/24.00 74.1757/74.25 HDTV 1080P

10. 1920*1080 33.716/33.750 29.97/30.00 74.1762/74.25 HDTV 1080P

11. 1920*1080 56.25 50.00 148.50 HDTV 1080P

12. 1920*1080 67.43/67.50 59.94/60.00 148.50 HDTV 1080P

Only for training and service purposes

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8. RGB, HDMI/DVI input (PC / DTV)

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

PC DDC

1 720*400 31.469 70.08 28.32 DOS O

2 640*480 31.469 59.940 25.175 VESA(VGA) O

3 640*480 37.500 75.000 31.500 VESA(VGA) O

4 800*600 37.879 60.317 40.000 VESA(SVGA) O

5 800*600 46.875 75.000 49.500 VESA(SVGA) O

6 1024*768 48.363 60.004 65.000 VESA(XGA) O

7 1024*768 56.476 70.069 75.000 VESA(XGA) O

8 1024*768 60.023 75.029 78.750 VESA(XGA) O

9 1280*768 47.776 59.870 79.500 VESA(WXGA) O

10 1360*768 47.712 60.015 85.500 VESA(WXGA) O

11 1366*768 47.13 59.65 72.00

DTV

1 720*576 31.25 50.00 27.00 SDTV576p

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 26.97/27.00 23.976/24.00 74.1757/74.25 HDTV 1080P

8 1920*1080 33.716/33.750 29.97/30.00 74.1762/74.25 HDTV 1080P

9 1920*1080 56.25 50.00 148.50 HDTV 1080P

10 1920*1080 67.43/67.50 59.94/60.00 148.50 HDTV 1080P

7. RGB input (PC)

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

PC DDC

1 720*400 31.469 70.08 28.32 DOS X

2 640*480 31.469 59.940 25.175 ESA(VGA) O

3 640*480 37.500 75.000 31.500 VESA(VGA) O

4 800*600 37.879 60.317 40.000 VESA(SVGA) O

5 800*600 46.875 75.000 49.500 VESA(SVGA) O

6 1024*768 48.363 60.004 65.000 VESA(XGA) O

7 1024*768 56.476 70.069 75.000 VESA(XGA) O

8 1024*768 60.023 75.029 78.750 VESA(XGA) O

9 1280*768 47.776 59.870 79.500 VESA(WXGA) O

10 1360*768 47.712 60.015 85.500 VESA(WXGA) O

11 1366*768 47.13 59.65 72.00

Only for training and service purposes

- 9 -

ADJUSTMENT INSTRUCTION

1. Application Object

These instructions are applied to all of the 32" LCD TV, LB73B

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 100% White

Pattern (06CH).(or 8. White Pattern status of Ez-Adjust)

* How to enter White Pattern

1) Press the POWER ON key on the adjustment remote control or press the ADJ key on the adjustment remote control to enter Ez-Adjust.

2) Select the ‘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, It is possible to heat run the set without

separate signal generator.

Caution : When you keep the still screen on for more than 20 minutes (Especially 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. EDID(The Extended Display Identification Data) /DDC(Display Data Channel) Download

3-1. Synopsis

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 DDC2B protocol.

3-2. HDMI EDID Data Input

(1) Required Test Equipment

1) PC, Jig for adjusting DDC. (PC serial to D-sub Connection equipment)

2) S/W for writing DDC (EDID data write & read)

3) D-Sub cable

4) Jig for HDMI Cable connection

(2) Adjustment preparation & device configuration

1) Configure as Fig. 1, and turn on the PC and JIG.

2) Run the DDC recording S/W (EDID Data Write & Read). (Execute in DOS mode)

3-3. EDID DATA

(1) EDID for HDMI-1 (DDC (Display Data Channel) Data)

(2) EDID for HDMI-2 (DDC (Display Data Channel) Data)

LCD TV SET

<Fig. 1> Connection Diagram of CPLD Download

0123456789ABCDEF

000FFFFFFFFFFFF001E6D010001010101 10 00 11 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23 20 09 48 4C AF CE 00 31 40 45 40 61 40 81 80 A9 40 30 D1 C0 01 01 01 01 66 21 50 B0 51 00 1B 30 40 70 40 36 00 C4 8E 21 00 00 1A 02 3A 80 18 71 38 2D 40 50 58 2C 45 00 C4 8E 21 00 00 1E 00 00 00 FD 00 30 60 58 1F 64 11 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 01 00

0123456789ABCDEF

0 02031EF14E2022101F0102 0304051293 10 14 07 16 23 15 07 50 66 03 0C 00 10 00 80 01 1D 20 00 72 51 D0 1E 20 6E 28 55 00 C4 8E 21 00 00 1E 30 01 1D 80 18 71 1C 16 20 58 2C 25 00 C4 8E 21 00 40 00 9E 8C 0A D0 90 20 40 31 20 0C 40 55 00 4C 6C 50 42 00 00 18 01 1D 00 BC 52 D0 1E 20 B8 28 55 40 60 C4 8E 21 00 00 1E 01 1D 80 D0 72 1C 16 20 10 2C 70 25 80 C4 8E 21 00 00 9E 00 00 00 00 00 00 00 58

0123456789ABCDEF

0 02031EF14E2022101F0102 030405 1293 10 14 07 16 23 15 07 50 66 03 0C 00 20 00 80 01 1D 20 00 72 51 D0 1E 20 6E 28 55 00 C4 8E 21 00 00 1E 30 01 1D 80 18 71 1C 16 20 58 2C 25 00 C4 8E 21 00 40 00 9E 8C 0A D0 90 20 40 31 20 0C 40 55 00 4C 6C 50 42 00 00 18 01 1D 00 BC 52 D0 1E 20 B8 28 55 40 60 C4 8E 21 00 00 1E 01 1D 80 D0 72 1C 16 20 10 2C 70 25 80 C4 8E 21 00 00 9E 00 00 00 00 00 00 00 48

(3) EDID for HDMI-3 (DDC (Display Data Channel) Data)

(4) EDID for RGB

4. MST3361M-Set Adjustment

4-1. Synopsis

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.

4-2. Test Equipment

Adjustment remote controller, 801GF (802B, 802F, 802R), MSPG925FA, MSPG-1025D Pattern Generator (480i/ 1080P Horizontal 60Hz Color Bar Pattern output must be possible and output level must be adjusted accurately to

0.7±0.1Vp-p.)

4-3. Adjustment

(1) How to adjustment the Component1

1) Input color bar pattern of 480i 60Hz mode that is supported to Component 1 input and select ‘Component 1’.

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’. Press the Vol+ Key to adjust the component1.

3) When the adjustment is completed normally, a message saying “ADC Component1 Success” is displayed and when the adjustment is not completed normally, a message saying ‘ADC Component1 480i Fail’ is displayed.

4) 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.

(2) How to adjustment the Component2, RGB

1) Input color bar pattern of 1080p 60Hz mode that is supported to Component 2, RGB input and select ‘Component 2’.

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. Adjust 1080p Comp2/ RGB’. Press the Vol+ key to adjust the component 2.

3) When the adjustment is completed normally, a message saying ‘ADC Component2 Success’ is displayed. and when the adjustment is not completed normally, a message saying ‘ADC Component2 1080p Fail’ is displayed.

4) When the adjustment is not normally completed, make the adjustment again after checking the pattern or adjustment condition. The error message is as 4-3/ (1)/

4).

5) After adjustment is complete, exit the adjustment mode by pressing the ADJ KEY.1

- 10 -

Only for training and service purposes

(Fig. 2) Adjust Pattern :100% 8 Color Bar Pattern

0123456789ABCDEF

0 02031EF14E2022101F0102 030405 1293 10 14 07 16 23 15 07 50 66 03 0C 00 30 00 80 01 1D 20 00 72 51 D0 1E 20 6E 28 55 00 C4 8E 21 00 00 1E 30 01 1D 80 18 71 1C 16 20 58 2C 25 00 C4 8E 21 00 40 00 9E 8C 0A D0 90 20 40 31 20 0C 40 55 00 4C 6C 50 42 00 00 18 01 1D 00 BC 52 D0 1E 20 B8 28 55 40 60 C4 8E 21 00 00 1E 01 1D 80 D0 72 1C 16 20 10 2C 70 25 80 C4 8E 21 00 00 9E 00 00 00 00 00 00 00 38

0123456789ABCDEF

000FFFFFFFFFFFF001E6D010001010101 10 0E 11 01 03 18 73 41 96 0A CF 74 A3 57 4C B0 23 20 09 48 4C AF CF 00 31 40 45 40 61 40 81 80 A9 40 30 D1 C0 01 01 01 01 66 21 50 B0 51 00 1B 30 40 70 40 36 00 C4 8E 21 00 00 1A 02 3A 80 18 71 38 2D 40 50 58 2C 45 00 C4 8E 21 00 00 1E 00 00 00 FD 00 30 60 58 1F 64 11 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 01 59

0123456789ABCDEF

0 020304000E1F008051001E 3040803700 10 C4 8E 21 00 00 1C 00 00 00 00 00 00 00 00 00 00 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 30 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 70 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 25

Only for training and service purposes

- 11 -

5. Adjustment of White Balance

5-1. Required Equipment

(1) 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.

(2) Automatic adjustor (with automatic adjustment hour

necessity and the RS-232C communication being possible. Baud Rate = 115200)

(3) Video Signal Generator MSPG-925F 720p, 216 Gray

(Model : 217, Pattern : 78)

5-2. Measuring device connection diagram

(Automatic Adjustment)

5-3. 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 5.White Balance menu, you can select NONE, INNER, 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 6.White-Balance, and the pattern is automatically displayed. (When you set the Option to INNER, the default is always set to INNER)

1) Connect the set according to the internal pattern or HDMI input in accordance with 5.2 measuring device connection diagram.

2) Set the Baud Rate of RS-232C to 115200. It is set to 115200 as default.

3) Connect the RS-232C Cable to the set.

4) Connect the HDMI Cable to the set. (Limited to the set with HDMI option)

5) Select and adjust the model applicable to LB73B chassis from the adjuster.

Caution) When you adjust automatically, RS-232C Command

is used.

Wb 00 00 Start automatic adjustment of white balance Wb 00 10 Start gain adjustment (Internal pattern) Ja 00 ff Adjustment data Jb 00 c0 … Wb 00 1f End gain adjustment * Adjust offset as necessary (wb 00 20(Start), wb 00 2f(End)) Wb 00 ff End automatic adjustment of white balance (Internal pattern disappears)

Caution) Adjustment map

* 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.

R Gain

G Gain

B Gain

R Cut

G Cut

B Cut

CENTER

(DEFAULT)(Hex)

192

127

Min

Max

192

Cool

192

Mid

192

Warm

RS-232C COMMAND

[CMD ID DATA]

Cool

Mid

Warm

Color Analyzer

Full W hite Patter n

RS-232C

(Inner Pattern)

<Fig. 3> Connection diagram for internal pattern

<Fig. 4> Connection diagram for HDMI input

Remark

RS-232C Command

[CMD ID DATA]

Start white balance adjustment

Start Gain adjustment(Internal white pattern)

End Gain adjustment

Start Offset adjustment (Internal white pattern)

End Offset adjustment

End white Balance adjustment (Internal pattern disappear)

Only for training and service purposes

5-4. Adjustment of White Balance

(For manual adjustment)

(1) Required Equipment

: 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 below White balance adjustment coordinate.

(2) Sequence

1) Press the ADJ of adjustment adjustment remote control to enter ‘EZ-ADJUST’.

2) Select 9.TEST PATTERN using the CH + / - KEY and press the Enter KEY to execute a heat run for more than 30 minutes.

3) 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.

4) Press the ADJ of adjustment remote control, select ‘6.White-Balance’ of ‘Ez – Adjust’ and enter the adjustment mode using the right key (

G).

(When you press the

G button, the screen enters the full

white internal pattern.)

5) The adjustment is executed in 3 different white balance of COOL, MEDIUM and WARM.

2) In case that White balance is COOL.

- Fix R-Cut/ G-Cut/ B-Cut to 64 and adjust the color

coordinates t downward.

In case that White balance is Medium.

- Fix R-Cut/ G-Cut/ B-Cut to 64 and adjust the color

coordinates t downward.

In case that White balance is Warm

- Fix R-Cut/ G-Cut/ B-Cut to 64 and adjust the color

coordinates t downward.

- Adjust by using Vol ± key.

4) When the adjustment is completed, press the OK (

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

* Note : White Balance adjustment coordinate and white balance

1) Standard white balance standard white balance coordinate when using CS-1000 device COOL : T=11000K, Δuv=0.000, x=0.276, y=0.283 MEDIUM : T=9300K, Δuv=0.000, x=0.285, y=0.293 WARM : T=6500K, Δuv=0.000, x=0.313, y=0.329

2) Directed color coordinate when using CA-210 CH 9 * Brightness: Full white 216gray

6. Video Set adjustment

6-1. Synopsis

This is a adjustment to reduce the color difference of RF, video signal.

6-2. Analog RF and AV-PAL Adjustment

1) 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 : 202(PAL), Pattern : 33(100% color Bar), the following video is displayed on the screen.

* Because the above pattern can differ by the model and

pattern for each device, you must check the pattern first.

2) When the receiving signal is confirmed after inputting the internal signal, press the ADJ key on the adjustment remote control to enter ‘EZ-ADJUST’. Select ‘3.Adjust RF and Video’ and press the right key (

G) to enter the

adjustment mode.

3) When you enter the adjustment mode, the video is automatically set to TV 3CH and the following window is displayed.

4) When the adjustment is completed, a message saying ‘RF Configuration Success’ is displayed. If the adjustment has failed, a message saying ‘RF Configuration Fail’ is displayed.

5) When the automatic adjustment of RF signal is completed, it is automatically switched to the AV1 Mode, and automatic adjustment for Video Mode is done. When the automatic adjustment is completed, a message saying ‘AVPAL Configuration Success’ is displayed. If the adjustment has failed, a message saying ‘AV-PAL Configuration Fail’ is displayed.

- 12 -

Color temperature Color analyzer Color coordinate

COOL CA-210 0.276 ± 0.002 0.283 ± 0.002

MEDIUM CA-210 0.285 ± 0.002 0.293 ± 0.002

WARM CA-210 0.313 ± 0.002 0.329 ± 0.002

<Fig 5> Model : 202(PAL), Pattern 33(100% color Bar)

<Fig 6>

6-3. AV NTSC adjustment

1) Connect the Video Signal Generator (Master) to AV input terminal with AV output. At this time, when you enter the input pattern as Model : 201(NTSC), Pattern : 33(100% color Bar), the following video is displayed on the screen.

2) Press the ADJ key on the adjustment remote control to enter ‘EZ-ADJUST’. Select ‘4.Adjust AV_NTSC’ and press the right key (

G) to enter the adjustment mode.

3) When the adjustment is completed, a message saying ‘AVNTSC Configuration Success’ is displayed. If the adjustment has failed, a message saying ‘AV-NTSC Configuration Fail’ is displayed.

- 13 -

Only for training and service purposes

<Fig 6> Model : 201(NTSC), Pattern 33(100% color Bar)

Only for training and service purposes

- 14 -

SIF

NTP3000

I2S

SPDIF

I2S

CVBS(NT Main)

DDR2

64MBx2

DDR2

64MBx2

Flex Bus

RGB 30 b it

TPA

Analo g

Front

End

USB 1.1

I2C Port0

I2C CH1

I2C CH2

I2C CH3

MTV415

Mic om

MTV415

Mico m

USB (upg rade ready! !)

Dead IC when Standb y

Vid eo

Scaler

Vid eo

Sca ler

1 or 2

Alive IC when Standby

Audio

Vid e o

AV2 / L/R

MNT Out L/ R

COMP1 L/ R

COMP2 L/ R

RGB L/ R

TP_IN1

AV1

AV2

AV1, Y/C1

AV2, Y/C2

Flash

(NOR 32MB

Flash

(NOR 32MB)

Latc h

Latc hx2

24C512

Cable

A/NT

63LVD1023

1080P

LVDS

Con.

1080P

LVDS

Con.

Dual

AV1 / L/R

GPIO

I2S

ATI

X260

(# of MPEG decoder)

COMP2

RGB

CS8416

HDMI SPDIF

I2S

MST3361

1HDMI +

1ADC

MST3361

1HDMI +

1ADC

RGB

HDMI1/2/ 3

SPDIF

COMP1

Opt .

FRC94xyH

DDR1

RGB o dd

RGB even

120Hz

TPB

USB 1.1

USB(EMF)

PCI

3:1

Demux

24C16

Air

MSP4450K

I2S

SIF

16MB

3:1

Demux

TROUBLESHOOTING

1. VIDEO

(1) NO OSD(FHD)

Only for training and service purposes

- 15 -

Check L729

Check

Pow er conn ect or

Replace Pow er board

Check T HC63LVD1023 (IC601)

#9(DE), #15(Clk), #7(Hs ync),

#8(Vsync)

Check X260 ( IC101)

Check P600 #47(DISP_EN),

#33(TXAC-) , #32(TXAC+) ,

#17(TXBC-) , #16(TXBC+)

Check T HC63LVD1023 (IC601)

Check L VDS Cable

Check PDP/LCD Module

Control bo ard

1 : _Check the L729 HIGH.

_Check Power connecto r.

2 : _Check the THC63LVD1023 (IC601) inp ut signal

#(Clk) :

74.25MHz

3 : _Check the P600 input sig n al

#47(DISP_EN) :

#33 (TXAC-) :

74.25MHz

3.3V

GND

#32 (TXAC+) :

4 : _Check the LVDS Cable

5 : _Ch eck the PDP Modul e control bo ard

#17 (TXBC-) :

#16 (TXBC+) :

74.25MHz

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