LG 55LH55, 55LH55-UA, 55LH40, 55LH40-UA, 55LH41 Service Manual

...

LCD TV

SERVICE MANUAL

CAUTION

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

CHASSIS : LA92B

MODEL : 55LH55 55LH55-UA

North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com

Internal Use Only

Printed in KoreaP/NO : MFL58436010 (0904-REV00)

Only for training and service purposes

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CONTENTS

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

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

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

ADJUSTMENT INSTRUCTION ...............................................................14

TROUBLE SHOOTING............................................................................18

BLOCK DIAGRAM...................................................................................29

EXPLODED VIEW .................................................................................. 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 Exploded View. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer.

General Guidance

An isolation Transformer should always be used during the servicing of a receiver whose chassis is not isolated from the AC power line. Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal injury from electrical shocks.

It will also protect the receiver and it's components from being damaged by accidental shorts of 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

When 25A is impressed between Earth and 2nd Ground for 1 second, Resistance must be less than 0.1

*Base on Adjustment standard

IMPORTANT SAFETY NOTICE

0.15uF

Ω

Only for training and service purposes

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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

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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SPECIFICATION

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

4. Electrical specification

4.1 General Specification

1. Application range

This specification is applied to the LCD TV used LA92B chassis.

2. Requirement for Test

Each part is tested as below without special appointment.

1) Temperature : 25±5ºC (77±9ºF), CST : 40±5ºC

2) Relative Humidity : 65±10%

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

* Standard Voltage of each products is marked by models.

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

5) The receiver must be operated for about 5 minutes prior to the adjustment.

3. Test method

1) Performance: LGE TV test method followed

2) Demanded other specification

- Safety: UL, CSA, IEC specification, CE

- EMC: FCC, ICES, IEC specification, CE

No Item Specification Remark

1 Receiving System ATSC/ NTSC-M 2 Aspect Ratio 16:9 3 LCD Module LC370WUF-SBM1(With Inverter) FHD+Trumotion 240Hz 37LH55-UA

LC420WUF-SBM1(Without Inverter) FHD+Trumotion 240Hz 42LH55-UA LC470WUF-SBM1(Without Inverter) FHD+Trumotion 240Hz 47LH55-UA LC550WUD-SBM1(With Inverter) FHD+Trumotion 240Hz 55LH55-UA

4 Available Channel 1) VHF : 02 ~ 13

2) UHF : 14 ~ 69

3) DTV : 02 ~ 69

4) CATV : 01 ~135

5) CADTV : 01 ~ 135

5 Operating Environment Temp.:0 ~ 40 deg

Humidity : ~ 80 %

6 Storage Environment Temp.:-20 ~ 60 deg

Humidity : ~ 85 % 7 Input Voltage AC100 ~240V,50/60Hz 8 Tuning system FS

4.2 EyeQ-Green Motion Characters.

Ambient Calculative Sensor

Backlight UI Contrast Brightness Sharpness Color

Illumination Illumination

500 300 100 100 50 70 70 300 180 55 90 50 62 50 200 120 25 90 50 58 54

50 42 0 90 50 52 65

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Only for training and service purposes

5 Safety and Regulation

No Item Min Typ Max Unit Remark

1. Force Stability –Incline Plane Tip Test 10 deg IEC60065

2. Force Stability –Level Tip Test weigthx 0.13x9.8 N

3. Isolation Gap,AC-AC 3 mm

4. Isolation Gap,AC-DC 3 mm

5. Isolation Gap,Primary <-> GND 3 mm Isolation Gap,Primary <-> Secondary 6.0 mm

6. Power Consumption,Max 304W 47LH55-UA (1/8W non-clipped max.audio signal &Input voltage 110Vac/60HZ(North America)

International VideoSignal)

7. Power Consumption,Stand by (Input 0.5 1W (ST-BY power saving circuit)

voltage110Vac/60HZ(North America)

8. Power Consumption,Switch off 0.02 W

9. Energy Saving Off 100 % <Test Condition>

Minimum 65 75 85 % Full white pattern Medium 43 53 63 % Maximum 17 27 37 % Screen Off 15 %

10. OPC Black luminance 75 % 150 Gray Input <Test Condition> difference of OPC

-white No Luminance

Vivid mode,4% window white pattern

on/off mode difference

*255 Gray Input Case:white/black No Luminance difference

11. Dielectric Voltage GND 1500 V/min at 100mA 1.5KV IEC60065

SIGNAL 3000 V/min at 100mA 3KV

12. Isolation Resistance 4 ∞ MΩ

13. Leakage Current 0.35 mA rms

14. UL Compliance Safety UL1492

EMC FCC Class B

15. CSA Compliance Safety CSA C22.2.

EMC IC Class B

6. DIGITAL Part

No Item Standard Unit Remark

1. VSB Receiving CH.2 ~69CH 1 ~135CH(CATV) 1 ~135CH(CADTV))

2. Video Resolution ATSC 18 FORMAT

3. Audio Bit Resolution 32,40,48,56,64,80,96,112,128,160, Kbps 192,224,256,320,384,448,512,576,640

4. VSB RF Input 75Ω unbalanced, F type Connector input

5. Sync Stable Time Under 3.0 <None>SEC

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Only for training and service purposes

7. Chroma& Brightness

7.1 Module optical specification

7.2Max Luminance &Contrast measure standard specification

- Max Luminance measure specification

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

2) Measuring instrument: CA-210 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)*1/5(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)*1/5(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.

- Luminance uniformity measure specification

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

2) Measure average brightness in 5 points.

Signal Picture Mode Dynamic Contrast Dynamic Color Black Level OPC RF NTSC-M Vivid High High Low Off AV NTSC-J Vivid High High High Off

Component 720P Vivid High High High Off

RGB 1024x768 Vivid High NA NA Off

HDMI DTV 720P Vivid High High Low Off

No. Item Specification Min. Typ. Max. Remark

1. Max Luminance Modele

400 500 cd/m

(Center1-point/ Ful white pattern)

2. Luminance uniformity Luminance 77

3. Contrast Ratio 1000: 1 1300: 1 40000: 1(DCR) 50000:1(DCR)

4. Color Coordinates WX Typ 0.279 Typ

White

WY -0.03 0.292 +0.03

Xr 0.637

RED

Yr 0.333

Xg 0.287

Green

Yg 0.605 Xb 0.145

Blue

Yb 0.064

5. Color Temperatue Cool

Typ

0.276

Typ

85% Full white pattern

-0.015

0.283

+0.015

**The W/B Tolerance is

Medium 0.285 ±0.015 for Adjustment

0.293 Dynamic contrast :off

Warm 0.313 Dynamic color :off

0.329 Energy saving mode :off

6. Color Distortion, DG 10.0 %

7. Color Distortion,DP 10.0 deg

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

9. Color Killer Sensitivity -80 dB

- Contrast ratio measure specification

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

2) Dark room measure condition: Using touch type Color analyzer CA-210 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 45º of the panel surface.

4) Measure method

• In standard test condition,impress 30*30 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

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Only for training and service purposes

A: H/ 4mm B: V/ 4mm @ H,V: Active Area

8. Component Video Input (Y, CB/PB, CR/PR)

Specification

Remark

Resolution H-freq(kHz) V-freq(Hz) Pixel Clock(MHz)

1. 720*480 15.73 60 13.5135 SDTV ,DVD 480I

2. 720*480 15.73 59.94 13.5 SDTV ,DVD 480I

3. 720*480 31.47 60 27.027 SDTV 480P

4. 720*480 31.47 59.94 27.0 DTV 480P

5. 1280*720 45.00 60.00 74.25 HDTV 720P

6. 1280*720 44.96 59.94 74.176 HDTV 720P

7. 1920*1080 33.75 60.00 74.25 HDTV 1080I

8. 1920*1080 33.72 59.94 74.176 HDTV 1080I

9. 1920*1080 67.500 60 148.50 HDTV 1080P

10. 1920*1080 67.432 59.939 148.352 HDTV 1080P

11. 1920*1080 27.000 24.000 74.25 HDTV 1080P

12. 1920*1080 26.97 23.94 74.176 HDTV 1080P

13. 1920*1080 33.75 30.000 74.25 HDTV 1080P

14. 1920*1080 33.71 29.97 74.176 HDTV 1080P

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Only for training and service purposes

Specification

Remark DDC

Resolution H-freq(kHz) V-freq(Hz) Pixel Clock(MHz)

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

5. 1024*768 48.363 60.00 65.00 VESA(XGA) O

6. 1280*768 47.776 59.870 79.5 CVT(WXGA) X

7. 1360*768 47.712 60.015 85.50 VESA (WXGA) X

8. 1280*1024 63.981 60.020 108.00 VESA (SXGA) O

9. 1600*1200 75.00 60.00 162 VESA (UXGA) O

10. 1920*1080 66.587 59.934 148.5 HDTV 1080P O

9. RGB

9.1 PC INPUT

10. HDMI Input (PC/DTV)

10.1 PC Mode No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed Remark

1 640*350 31.468 70.09 25.17 EGA 2 720*400 31.469 70.08 28.32 DOS 3 640*480 31.469 59.94 25.17 VESA(VGA) 4 800*600 37.879 60.31 40.00 VESA(SVGA) 5 1024*768 48.363 60.00 65.00 VESA(XGA) 6 1280*768 47.776 59.870 79.5 CVT(WXGA) 7 1360*768 47.712 60.015 85.50 VESA (WXGA) 8 1280*1024 63.981 60.020 108.00 VESA (SXGA) 9 1600*1200 75.00 60.00 162 VESA (UXGA)

10 1920*1080 67.5 60 148.5 HDTV 1080P

10.2 DTV Mode No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed Remark

1 720*480 31.47 60 27.027 SDTV 480P 2 720*480 31.47 59.94 27.00 SDTV 480P 3 1280*720 45.00 60.00 74.25 HDTV 720P 4 1280*720 44.96 59.94 74.176 HDTV 720P 5 1920*1080 33.75 60.00 74.25 HDTV 1080I 6 1920*1080 33.72 59.94 74.176 HDTV 1080I 7 1920*1080 67.500 60 148.50 HDTV 1080P 8 1920*1080 67.432 59.939 148.352 HDTV 1080P

9 1920*1080 27.000 24.000 74.25 HDTV 1080P 10 1920*1080 26.97 23.94 74.176 HDTV 1080P 11 1920*1080 33.75 30.000 74.25 HDTV 1080P 12 1920*1080 33.71 29.97 74.176 HDTV 1080P

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Only for training and service purposes

11. EDID(The Extended Display Identification Data) / DDC(Display Data Channel) download

11.1 Overview It is a VESA regulation. A PC or a MNT will display an optimal resolution through information sharing without any necessity of user input. It is a realization of “Plug and Play”. Equpment

11.2 Equipment

• Adj. R/C

• Since embedded EDID data is used, EDID download jig, HDMI cable and D-sub cable are not need.

11.3 Download method

Press Adj. key On the Adj. R/C, press Adj. key then select EDID D/L. By pressing Enter key, EDID download will begin.

1) If Download is successful, OK is displayed.

2) If Download is a failure, NG is displayed.

3) Re-try download.

11.4 EDID Data

• Reference: Download is only possible in POWER ON MODE.

• RGB [C/S: 36FF]

EDID Block 0, Bytes 0-127 [00H-7FH] Block Type: EDID 1.3

• HDMI I [C/S: 1DCA]

EDID Block 0, Bytes 0-127 [00H-7FH] Block Type: EDID 1.3

EDID Block 1, Bytes 128-255 [80H-FFH] Block Type: CEA EDID Timing Extension Version3

0 1 23 45 67 89ABCDEF

0 00 FF FF FF FF FF FF 00 1E 6D 02 00 01 01 01 01 10 01 13 01 03 68 73 41 78 0A CF 74 A3 57 4C B0 23 20 09 48 4C A1 08 00 A9 40 81 80 61 40 45 40 31 40 30 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C 40 45 00 7E 8A 42 00 00 1E 01 1D 00 72 51 D0 1E 20 50 6E 28 55 00 7E 8A 42 00 00 1E 00 00 00 FD 00 39 60 3F 1F 52 10 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 36

0 1 23 45 67 89ABCDEF

0 00 FF FF FF FF FF FF 00 1E 6D 02 00 01 01 01 01 10 01 13 01 03 80 73 41 78 0A CF 74 A3 57 4C B0 23 20 09 48 4C A1 08 00 A9 40 81 80 61 40 45 40 31 40 30 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C 40 45 00 7E 8A 42 00 00 1E 01 1D 00 72 51 D0 1E 20 50 6E 28 55 00 7E 8A 42 00 00 1E 00 00 00 FD 00 39 60 3F 1F 52 10 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 1D

0 1 23 45 67 89ABCDEF

0 02 03 1F F1 47 10 22 20 05 84 03 02 26 15 07 50 10 09 07 07 67 03 0C 00 10 00 B8 2D E3 05 03 01 02 20 3A 80 18 71 38 2D 40 58 2C 04 05 7E 8A 42 00 00 30 1E 01 1D 80 18 71 1C 16 20 58 2C 25 00 7E 8A 42 40 00 00 9E 01 1D 00 72 51 D0 1E 20 6E 28 55 00 7E 50 8A 42 00 00 1E 8C 0A D0 8A 20 E0 2D 10 10 3E 96 60 00 7E 8A 42 00 00 18 26 36 80 A0 70 38 1F 40 30 70 20 25 00 7E 8A 42 00 00 1A 00 00 00 00 00 00 CA

Only for training and service purposes

- 12 -

• HDMI II [C/S: 1DBA] EDID Block 0, Bytes 0-127 [00H-7FH] Block Type: EDID 1.3

EDID Block 1, Bytes 128-255 [80H-FFH] Block Type: CEA EDID Timing Extension Version3

• HDMI III [C/S: 1DAA] EDID Block 0, Bytes 0-127 [00H-7FH] Block Type: EDID 1.3

EDID Block 1, Bytes 128-255 [80H-FFH] Block Type: CEA EDID Timing Extension Version3

0 1 23 45 67 89ABCDEF

0 02 03 1F F1 47 10 22 20 05 84 03 02 26 15 07 50 10 09 07 07 67 03 0C 00 30 00 B8 2D E3 05 03 01 02 20 3A 80 18 71 38 2D 40 58 2C 04 05 7E 8A 42 00 00 30 1E 01 1D 80 18 71 1C 16 20 58 2C 25 00 7E 8A 42 40 00 00 9E 01 1D 00 72 51 D0 1E 20 6E 28 55 00 7E 50 8A 42 00 00 1E 8C 0A D0 8A 20 E0 2D 10 10 3E 96 60 00 7E 8A 42 00 00 18 26 36 80 A0 70 38 1F 40 30 70 20 25 00 7E 8A 42 00 00 1A 00 00 00 00 00 00 AA

0 1 23 45 67 89ABCDEF

0 00 FF FF FF FF FF FF 00 1E 6D 02 00 01 01 01 01

10 01 13 01 03 80 73 41 78 0A CF 74 A3 57 4C B0 23 20 09 48 4C A1 08 00 A9 40 81 80 61 40 45 40 31 40 30 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C 40 45 00 7E 8A 42 00 00 1E 01 1D 00 72 51 D0 1E 20 50 6E 28 55 00 7E 8A 42 00 00 1E 00 00 00 FD 00 39 60 3F 1F 52 10 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 1D

- 13 -

Only for training and service purposes

• HDMI IV [C/S: 1D9A] EDID Block 0, Bytes 0-127 [00H-7FH] Block Type: EDID 1.3

EDID Block 1, Bytes 128-255 [80H-FFH] Block Type: CEA EDID Timing Extension Version3

12. Power

No Item Min Typ Max Unit Remark

1. Power On/Off 10000 times

2. DC Voltage Inverter Voltage 21.6 24 26.4 V

Logic Voltage(Vcc) 4.8 5 5.3 V Sound Amp Vcc 19 20 22 V Lips 20

22 24 26 V PSU 24V Micom B+ 3.25 3.4 3.55 V Tuner 5V 4.75 5.0 5.25 V VSC Vcc 24V 22.0 24.0 26.0 V PSU 24V

20V 19.0 20.0 21.0 V Lips 20 12V 11.0 12.0 13.0 V

5V 4.5 5.0 5.5 V Inside Temp.Under 20deg.

No operation 0 0.5 1 V

3. AC Power Shut Down Voltage 90 264 V Wide Range PSU

0 1 23 45 67 89ABCDEF

0 02 03 1F F1 47 10 22 20 05 84 03 02 26 15 07 50 10 09 07 07 67 03 0C 00 40 00 B8 2D E3 05 03 01 02 20 3A 80 18 71 38 2D 40 58 2C 04 05 7E 8A 42 00 00 30 1E 01 1D 80 18 71 1C 16 20 58 2C 25 00 7E 8A 42 40 00 00 9E 01 1D 00 72 51 D0 1E 20 6E 28 55 00 7E 50 8A 42 00 00 1E 8C 0A D0 8A 20 E0 2D 10 10 3E 96 60 00 7E 8A 42 00 00 18 26 36 80 A0 70 38 1F 40 30 70 20 25 00 7E 8A 42 00 00 1A 00 00 00 00 00 00 9A

0 1 23 45 67 89ABCDEF

0 00 FF FF FF FF FF FF 00 1E 6D 02 00 01 01 01 01

Only for training and service purposes

- 14 -

ADJUSTMENT INSTRUCTION

1. Application Range

This specification sheet is applied to all of the LCD TV with LA92B chassis.

2. Specification

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 instrument.

2) Adjustment must be done in the correct order.

3) The adjustment must be performed in the circumstance of 25 ±5ºC of temperature and 65±10% of relative humidity if there is no specific designation.

4) The input voltage of the receiver must keep 100~240V, 50/60Hz.

5) The receiver must be operated for about 5 minutes prior to the adjustment when module is in the circumstance of over 15.

In case of keeping module is in the circumstance of 0°C, it should be placed in the circumstance of above 15°C for 2 hours.

In case of keeping module is in the circumstance of below 20°C, it should be placed in the circumstance of above 15°C for 3 hours,.

*Caution When still image is displayed for a period of 20 minutes or longer (especially where W/B scale is strong. Digital pattern 13ch and/or Cross hatch pattern 09ch), there can some afterimage in the black level area.

3. Main PCB check process

*APC - After Manual-Insert, executing APC

3.1 Boot file Download

1. Execute ISP program “Mstar ISP Utility” and then click “Config” tab.

2. Set as below, and then click “Auto Detect” and check “OK” message. If “Error” is displayed, Check connection between computer, jig, and set.

3. Click “Read” tab, and then load download file (XXXX.bin) by clicking “Read”

4. Click “Connect” tab. If “Can’t ” is displayed, Check connection between computer, jig, and set.

5. Click “Auto” tab and set as below.

6. Click “Run”.

7. After downloading, check “OK” message.

3.2 USB DOWNLOAD(*.epk file download)

1. Put the USB Stick to the USB socket

2. Automatically detecting update file in USB Stick

- If your downloaded program version in USB Stick is Low, it didn’t work. But your downloaded version is High, USB data is automatically detecting

3. Show the message “Copying files from memory”

(3)

filexxx.bin

(1)

(4)

Please Check the Speed : To use speed between from 200KHz to 400KHz

filexxx.bin

(5)

(7) .OK

(5)

(6)

+ 31 hidden pages

LG 55LH55, 55LH55-UA, 55LH40, 55LH40-UA, 55LH41 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual