LG 37LK450 Service manual

1080P

LCD

(37"

diagonally)

37LK450

UB.CUSDLH as it s source.

Updated Sept

2011

Leandro Palmeira

rect

Training

37LK450

LCD TV Troubleshooting

37" Class 1080P LCD TV

This manual produced using model

Published August13th, 2011

ember

(See last page for updates).

’

OUTLINE

SPECIAL NOTE: The 37LK450 utilizes two different panels, power supplies, inverters and Main

Leandro Palmeira

boards. This manual is based upon the 37LK450-UB.CUSDLH model.

Preliminary Section:

Disassembly Section: Removal of Circuit Boards

37LK450-UB.CUSDLH Uses:

• Panel p/n: EAJ61754001 (AU OPTRONICS CORP)

• Power Supply p/n: EAY62170001

• Main Board p/n: EBT61525901 or p/n: EBT61542101

37LK450-UB.SUSYJK/CUSYLH Uses:

• Panel p/n: EAJ61768701 (LG DISPLAY CO. LTD.)

• Power Supply p/n: EAY60869307

• Main Board p/n: EBU61376604 or p/n: EBT61542109

Contact Information, Preliminary Matters, Specifications, LCD Overview, General Troubleshooting Steps, Signal Distribution, Disassembly Instructions and Voltages

Troubleshooting Section: Board Operation Troubleshooting of :

• Switch Mode Power Supply with on board Ballast

• Main Board

• T-CON (TFT Panel Driver Board)

• Front IR/Intelligent

• Touch Key Board

• Speaker

August 2011 37LK450 LCD-DV

Overview of Topics to be Discussed

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37LK450 LCD Direct View Display

This Section will cover Contact Information and remind the Technician of Important Safety Precautions for the Customers Safety as well as the Technician and the Equipment.

Basic Troubleshooting Techniques which can save time and money sometimes can be overlooked. These techniques will also be presented.

This Section will get the Technician familiar with the Disassembly, Identification and Layout of the LCD Display Panel.

Section 1

At the end of this Section the Technician should be able to Identify the Circuit Boards and have the ability and knowledge necessary to safely remove and replace any Circuit Board or Assembly.

August 2011 37LK450 LCD-DV

IMPORTANT SAFETY NOTICE

CAUTION

Preliminary Matters (The Fine Print)

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The information in this training manual is intended for use by persons possessing an adequate background in electrical equipment, electronic devices, and mechanical systems. In any attempt to repair a major Product, personal injury and property damage can result. The manufacturer or seller maintains no liability for the interpretation of this information, nor can it assume any liability in conjunction with its use. When servicing this product, under no circumstances should the original design be modified or altered without permission from LG Electronics. Unauthorized modifications will not only void the warranty, but may lead to property damage or user injury. If wires, screws, clips, straps, nuts, or washers used to complete a ground path are removed for service, they must be returned to their original positions and properly fastened.

To avoid personal injury, disconnect the power before servicing this product. If electrical power is required for diagnosis or test purposes, disconnect the power immediately after performing the necessary checks. Also be aware that many household products present a weight hazard. At least two people should be involved in the installation or servicing of such devices. Failure to consider the weight of an product could result in physical injury.

August 2011 37LK450 LCD-DV

Regulatory Information

ESD Notice

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Today’s sophisticated electronics are electrostatic discharge (ESD) sensitive. ESD can weaken or damage the electronics in a manner that renders them inoperative or reduces the time until their next failure. Connect an ESD wrist strap to a ground connection point or unpainted metal in the product. Alternatively, you can touch your finger repeatedly to a ground connection point or unpainted metal in the product. Before removing a replacement part from its package, touch the anti-static bag to a ground connection point or unpainted metal in the product. Handle the electronic control assembly by its edges only. When repackaging a failed electronic control assembly in an anti-static bag, observe these same precautions.

(Electrostatic Static Discharge)

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a residential installation. This equipment generates, uses, and can radiate radio frequency energy, and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving antenna; Increase the separation between the equipment and the receiver; Connect the equipment to an outlet on a different circuit than that to which the receiver is connected; or consult the dealer or an experienced radio/TV technician for help.

August 2011 37LK450 LCD-DV

LG Contacts Page

Technical Support (and Part Sales)

(800) 847

7597

LG Web Training

https://lge.webex.com

Also available on the Plasma Page:

LG Electronics Alabama, Inc

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Customer Service (and Part Sales) (800) 243-0000

USA Website (GSFS) http://gsfs-america.lge.com

ustomer Service Website http://www.us.lgservice.com

or also GCSC http://aic.lgservice.com

Knowledgebase Website http://lgtechassist.com

LG CS Learning Academy http://ln.lge.com/ilearn

User Name/Password required

The following is available on the Learning Academy web site: Training Manuals, Schematics with

Navigational Bookmarks, Start-Up Sequence, Owner’s Guides, Interconnect Diagrams, Dimensions,

Connector IDs, Product Pictures and Features.

PDP Panel Alignment Handbook,

Plasma Control Board ROM Update (Jig required)

Published August 2011 by LG Technical Support and Training

201 James Record Road, Huntsville, AL, 35813.

Also 2010/11 Wireless Ready Models Software Downloads

Presentations with Audio/Video and Screen Notations

http://136.166.4.200

Use http://LGLearn.com

No User Name/Password

August 2011 37LK450 LCD-DV

LCD Direct View Overview

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Safety and Handling Regulations

1. Approximately 20 minute pre-run time is required before making any picture performance

adjustments from the Menu.

2. Refer to the Voltage/Current silk screening on the Switch Mode Power Supply.

3. C-MOS circuits are sensitive to static electricity.

Use caution when dealing with these IC and circuits.

4. Exercise care when making voltage and waveform checks to prevent costly short circuits

from damaging the unit.

5. Be cautious of lost screws and other metal objects to prevent a possible short in the

circuitry.

Checking Points to be Considered

1. Check the appearance of the Replacement Panel and Circuit Boards for both physical

damage and part number accuracy.

2. Check the model label. Verify model names and board model matches.

3. Check details of defective condition and history. Example: Oscillator failure dead set, etc…

August 2011 37LK450 LCD-DV

Basic Troubleshooting Steps

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Define, Localize, Isolate and Correct

•Define

the failure. Use your senses Sight, Smell, Touch and Hearing. Look for burned parts and check for possible overheated components. Capacitors will sometimes leak dielectric material and give off a distinct odor. Frequency of power supplies will change with the load, or listen for relay closing etc. Observation of the front Power LED may give some clues.

•Localize

checked and after giving a thorough examination using your senses the first check should always be the DC Supply Voltages to those circuits under test. Always confirm the supplies are not only the proper level but be sure they are noise free. If the supplies are missing check the resistance for possible short circuits.

•Isolate

Oscilloscope to make a final determination of the failure. Look for correct Amplitude Phasing and Timing of the signals also check for the proper Duty Cycle of the signals. Sometimes “glitches” or “road bumps” will be an indication of an imminent failure.

Look at the symptom carefully and determine what circuits could be causing

After carefully checking the symptom and determining the circuits to be

To further isolate the failure, check for the proper waveforms with the

•Correct

check the DC Supplies for proper levels. Make all necessary adjustments and lastly always perform a Safety AC Leakage Test before returning the product back to the Customer.

The final step is to correct the problem. Be careful of ESD and make sure to

August 2011 37LK450 LCD-DV

37LK450 PRODUCT INFORMATION SECTION

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This section of the manual will discuss the specifications of the

LCD Direct View Display

37LK450

August 2011 37LK450 LCD-DV

Key Features

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• Full HD 1080p Resolution

• ENERGY STAR® Qualified

• Picture Wizard II

• Intelligent Sensor

• Smart Energy Saving

• ISFccc® Ready

IS IT A TV? OR SOMETHING BETTER?

If you been hearing about how amazing Blu-ray entertainment is, or how much better

your favorite shows would look in HD, you've heard right. The thing is, you need 1080p

Full HD to get the most out of both. With the LK450, you can.

August 2011 37LK450 LCD-DV

Logo Familiarization Page 1 of 2

Save Energy, Save Money

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FULL HD RESOLUTION 1080P HD Resolution Pixels: 1920 (H) × 1080 (V) This stunning picture is the reason you wanted HDTV in the first place. With almost double the pixel resolution, Full HD 1080p gives it superior picture quality over standard HDTV. You’ll see details and colors like never before.

ENERGY STAR qualified TVs use about 30% less energy than standard units. Earning the ENERGY STAR means a product meets strict energy efficiency guidelines set by the US Environmental Protection Agency and the Department of Energy.

AV Mode "One click" Cinema, Sport, Game mode.

TAKE IT TO THE EDGE is a true multimedia TV with an AV Mode which allows you to choose from 3 different modes of Cinema, Sports and Game by a single click of a remote control.

Picture Wizard. “Find the Perfect Picture”

Get easy self-calibration with on-screen reference points for key picture quality elements such as black level, color, tint, sharpness and backlight levels. Take the guesswork out of picture adjustments with this simple-to-use feature.

August 2011 37LK450 LCD-DV

Logo Familiarization Page 2 of 2

joy

jy g p

for professional calibration of brightness, contrast, tint, sharpness, color

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Clear Voice Clearer Dialogue Sound

Automatically enhances and amplifies the sound of the human voice frequency range to provide high-quality dialogue when background noise swells.

Intelligent Sensor

Let your TV do the adjustments for you. Intelligent Sensor automatically optimizes the picture to the lighting and color conditions in the room for a more en

ISFccc ready

LG’s ISFccc Ready HDTVs contain the detailed standards necessary

levels and much more to meet local lighting conditions for both day and nighttime viewing. Settings are added to preset modes for easy access from your LG remote.

able viewing experience.

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p/n AKB72915239

37LK450 Remote Control

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TOP PORTION

BOTTOM PORTION

August 2011 37LK450 LCD-DV

TV Rear Input / Output Jacks

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Side In/Out

USB for Software Upgrades,

Music, Videos and Photos.

USB

Rear In/Out Jacks

AV/Component

Optical

RGB / PC

RS232

HDMI 1/2

Out

Composite

RGB

Audio

Component

Antenna

HDMI 3

Head

Phones

Composite

August 2011 37LK450 LCD-DV

1) Download the Software File.

Generic Plasma USB Automatic Software Download Instructions

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Jump Drive Directory

Software File

LG_DTV Sub-Directory

2) Copy new software (xxx.epk) to "LG_DTV"

folder. Make sure to have correct software file.

3) With TV turned on, insert USB flash drive.

4) The “TV Software Upgrade” screen appears.

(See figure to right)

5) Cursor left and highlight "START" Button and push “Enter” button using the remote control.

6) You can see the download progress Bar.

7) Do not unplug until unit has automatically restarted.

8) When download is completed, you will see “COMPLETE”.

9) Your TV will be restarted automatically.

Currently Installed Version

Software Version found on the USB Flash Drive

File found on the USB Flash Drive

* CAUTION: Do not remove AC power or the USB Flash Drive. Do not turn off Power, during the upgrade process.

Highlight Start Press Select

Software Files are now available from LGTechassist.com

August 2011 37LK450 LCD-DV

Manual Software Download:

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Prepare the Jump Drive as described in the “USB Automatic Download” section and insert it into the USB port.

Bring up the Customer’s Menu and scroll to “OPTIONS”.

(Nothing should be highlighted on the right side.) Press the “FAV” key 7 times to bring up the first screen for Manual Download Screen (Expert Mode).

The Manual Software Download screen appears.

Highlight the Software update file and press “SELECT” to begin the download process.

WARNING: Use extreme Caution when using the Manual “Forced” Download Menu. Any file can be downloaded when selected and may cause the Main board to become inoperative if the incorrect file was selected.

Location of

files found

On the Jump

Drive

August 2011 37LK450 LCD-DV

Accessing the Host Diagnostic Screen (Page 1 of 2)

Use the Host Diagnostic screen to investigate the signal quality of a problem channel.

Leandro Palmeira

1) Place Television on the digital channel that may be showing problems.

2) Bring up the Customer’s Menu. Highlight

“CHANNEL”. Press “ENTER” on the remote.

3) The “CHANNEL” Menu appears.

4) Press the (1) Key 5 to 8 times. The Host Diagnostics screen appears.

See next page for more details.

August 2011 37LK450 LCD-DV

37LK450 Understanding the Host Diagnostic Screen (Page 2 of 2)

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Host Diagnostics

Channel

Host Information

Model Name : 37LK450-UA (Liquid Crystal Display)

Memory

FLASH : 131072 KB

DRAM : 262144 KB

NVM : 128 KB

Selected

Channel Info : Digital 19-1

Parental Control : Channel is not blocked

Can’t display this information now

Current Channel (Main)

DVI/HDMI Status

Blocked or

Not Blocked

Host Release Version

Firmware Version(MP) : 1.05.01.01(321)

Micom Version : V0.05.3

Compile Date & Time : 20101013 & 13:05:30

Compile User : chanhun.kum

FAT Status (Main)

Center Frequency : 663.00 MHz

PCR lock : Locked

Modulation mode : QAM 256

Carrier lock status : Locked

SNR : 38 dB

Signal level : 99%

Channel Signal Level (Above 80% good)

Program Clock Reference (Locked or No)

Channel Type (8VSB, QAM 64, 256)

Channel (Locked or Unlocked)

Channel Signal to Noise Ratio

Channel Frequency

Software

Version

8VSB (Above 20 is good)

QAM 64 (Above 24 is good)

QAM 256 (Above 30 is good)

Exit

August 2011 37LK450 LCD-DV

Accessing the Service Menu

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To access the Service Menu.

1) You must have either Service Remote.

p/n 105-201M or p/n MKJ39170828

2) Press “In-Start”

3) A Password screen appears.

4) Enter the Password.

Note: A Password is required to enter the

Service Menu. Enter; 0000

Note: If 0000 does not work use 0413.

105-201M

MKJ39170828

August 2011 37LK450 LCD-DV

37LK450 Service Menu First Page

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Bring up the Service Menu using the Service Remote And pressing “In-Start” enter password 0413.

Model and S/N

IN SART

Model Name: 37LK450-UA Serial Number: 010LGPT00036 S/W Version: MICOM Version SPI Boot Version BOOT Version IR LED Version EDID Version (RGB) EDID Version (HDMI) Chip Type Debug Status

UTT : 12 APP History Ver.:321 PQL DB:AUO_CF_LGT10_XXXXXX

: 01.05.01.01 : 0.05.3 : 3.00.01 : 1.00.01 : 11.0 : 0.01 : 0.02 : SATURN 7R : RELEASE

Unit’s Total Time

SW Version

Video Processor

Chip Type

1. Adjust Check

2. ADC Data

3. Power Off Status

4. System 1

5. System 2

6. Model Number D/L

7. Test Option

8. External ADC

9. Spread Spectrum

10. Sync Level

11. Stable Count

12. ODC Test

Priority Audio

Processing Mode

Adjust Check

1. Country Group (Press OK to Save)

Country Group Code Country Group Country

2. Tool Option

Tool Option 1 Tool Option 2 Tool Option 3 Tool Option 4 Tool Option 5

3. Adjust White Balance :

4. Adjust ADC:

480i Component 1080p Component RGB

5. EDID(PCM) :

RGB HDMI1 HDMI2 HDMI3

Country Group

OK (0x1D) OK (0x3,0xCC) OK (0x3,0xBC) OK (0x3,0xAC)

02 US US

22152 19478 56324

2828

OK OK OK

August 2011 37LK450 LCD-DV

37LK450 Service Menu Power Off Status

Leandro Palmeira

(1) Bring up the Service Menu using the Service Remote (2) And pressing “In-Start” enter password 0413.

IN SART

Model Name: 37LK450-UA Serial Number: 010LGPT00036 S/W Version: MICOM Version SPI Boot Version BOOT Version IR LED Version EDID Version (RGB) EDID Version (HDMI) Chip Type Debug Status

UTT : 12 APP History Ver.:321 PQL DB:AUO_CF_LGT10_XXXXXX

Highlight

: 01.05.01.01

3. Power Off Status

: 0.05.3 : 3.00.01 : 1.00.01 : 11.0 : 0.01 : 0.02 : SATURN 7R : RELEASE

1. Adjust Check

2. ADC Data

3. Power Off Status

4. System 1

5. System 2

6. Model Number D/L

7. Test Option

8. External ADC

9. Spread Spectrum

10. Sync Level

11. Stable Count

12. ODC Test

(3) Highlight Item 3. Power Off Status

Power Off Status

0. POWER_OFF_BY_REMOTE_KEY

1. POWER_OFF_BY_REMOTE_KEY

2. POWER_OFF_BY_REMOTE_KEY

3. POWER_OFF_BY_INSTOP

4. POWER_OFF_BY_SW_DW

5. POWER_OFF_BY_REMOTE_KEY

6. POWER_OFF_BY_UNKNOWN

7. POWER_OFF_BY_UNKNOWN

8. POWER_OFF_BY_UNKNOWN

9. POWER_OFF_BY_REMOTE_KEY

10. POWER_OFF_BY_LOCAL_KEY

11. POWER_OFF_BY_INSTOP

12. POWER_OFF_BY_UNKNOWN

13. POWER_OFF_BY_UNKNOWN

14.POWER_OFF_BY_UNKNOWN

15. POWER_OFF_BY_ACDET

16. POWER_OFF_BY_REMOTE_KEY

17. POWER_OFF_BY_REMOTE_KEY

18. POWER_OFF_BY_REMOTE_KEY

19. POWER_OFF_BY_REMOTE_KEY

20. POWER_OFF_BY_REMOTE_KEY

21. POWER_OFF_BY_REMOTE_KEY

22. POWER_OFF_BY_REMOTE_KEY

See next page for Power Off Status Explained

August 2011 37LK450 LCD-DV

In Start Menu “Power Off Status”

POWER_OFF_BY_ABN

Leandro Palmeira

Factor MODE Contents

POWER_OFF_BY_CPUCMD Power off by CPU Command

POWER_OFF_BY_KEYTIMEOUT Power off when TV is not turned off during a certain time

ower off by abnormal status

Micom

CPU

POWER_OFF_BY_ACDET Power off by not detecting AC (abnormal case)

POWER_OFF_BY_RESET Power off by Micom Reset

POWER_OFF_BY_5VMNT Power off by not detecting 5V monitoring

POWER_OFF_BY_NO_POLLING

POWER_OFF_BY_REMOTE_KEY Power off by remote key

POWER_OFF_BY_OFF_TIMER Power off by Off timer

POWER_OFF_BY_SLEEP_TIMER Power off by sleep timer

POWER_OFF_BY_FAN_CONTRO

POWER_OFF_BY_INSTOP_KEY Power off by Instop Key

POWER_OFF_BY_AUTO_OFF Power off by auto off function (10 Min off with no Signal)

POWER_OFF_BY_ON_TIMER Power off by On timer (2 hours off with no button press after auto on)

POWER_OFF_BY_RS232C Power off by RS232C command

POWER_OFF_BY_SWDOWN Power off by software download

POWER_OFF_BY_LOCAL_KEY Power off by local key

Power off when receiving no ack

Power off by fan control

POWER_OFF_BY_CPU_ABNOR

MAL

POWER_OFF_BY_INV_ERROR Power off by LCD module inverter error

POWER_OFF_BY_OTA Power off by OTA update

POWER_OFF_BY_UNKNOWN Power off by the other causes

Power off by CPU Abnormal status

August 2011 37LK450 LCD-DV

37LK450 Lip Sync Adjust Screen

Leandro Palmeira

(1) Bring up the Service Menu using the Service Remote. (2) Press the “In-Start” button. (3) Enter password 0413 (or 0000).

IN SART SYSTEM 1

Model Name: 37LK450-UA Serial Number: 010LGPT00036 S/W Version: MICOM Version SPI Boot Version BOOT Version IR LED Version EDID Version (RGB) EDID Version (HDMI) Chip Type Debug Status

UTT : 12 APP History Ver.:321 PQL DB:AUO_CF_LGT10_XXXXXX

: 01.05.01.01 : 0.05.3

Select Item 4

: 3.00.01 : 1.00.01 : 11.0 : 0.01 : 0.02 : SATURN 7R : RELEASE

1. Adjust Check

2. ADC Data

3. Power Off Status

4. System 1

5. System 2

6. Model Number D/L

7. Test Option

8. External ADC

9. Spread Spectrum

Select Item 8

10. Sync Level

11. Stable Count

12. ODC Test

Negative (-1~-10) : Audio leads Video

Positive 1~20) : Video leads Audio

(4) Scroll to (System 1) then Right Cursor. (5) Scroll to “Item 8. Lip Sync Adjust(Input)”. Using the Cursor Left or Right adjust the value between -10~+20.

0. Baudrate

1. 2 Hours Off (On Timer)

2. 2 Hours Off (Screen Mute)

3. 15Min Force Off

4. Audio EQ

5. Audio Bass EQ

6. A2 Threshold

7. HDMI Sound(Port1)

8. Lip Sync Adjust(DTV)

9. Dimming

10. Tuner Option

11. Atten RF Signal

12. UTT Reset

Adjust each input

DTV, COMP1, HDMI1, etc.

13. Channel Mute

Adjust range: (-10~+20)

14. Debug Status

15. NVRAM Type

16. HDEV

17. Blue back

18. China Cable SO

19. Booster On (VHF)

20. Booster Off (VHF)

21. Booster On (UHF)

22. Booster Off (UHF)

HDMI Port1

Enhanced Ghost

115200

On Off On On On

Off

Reset

RELEASE

EEPROM

Off

On On

0 0 0 0

August 2011 37LK450 LCD-DV

37LK450 UTT Reset (IN START) Screen

Leandro Palmeira

IN SART SYSTEM 1

Model Name: 37LK450-UA Serial Number: 010LGPT00036 S/W Version: MICOM Version SPI Boot Version BOOT Version IR LED Version EDID Version (RGB) EDID Version (HDMI) Chip Type Debug Status

UTT : 12 APP History Ver.:321 PQL DB:AUO_CF_LGT10_XXXXXX

: 01.05.01.01 : 0.05.3 : 3.00.01 : 1.00.01 : 11.0 : 0.01 : 0.02 : SATURN 7R : RELEASE

Unit’s Total Time

1. Adjust Check

2. ADC Data

3. Power Off Status

4. System 1

5. System 2

6. Model Number D/L

7. Test Option

8. External ADC

9. Spread Spectrum

10. Sync Level

11. Stable Count

12. ODC Test

0. Baudrate

1. 2 Hours Off (On Timer)

2. 2 Hours Off (Screen Mute)

3. 15Min Force Off

4. Audio EQ

5. Audio Bass EQ

6. A2 Threshold

7. HDMI Sound(Port1)

8. Lip Sync Adjust(DTV)

9. Dimming

10. Tuner Option

11. Atten RF Signal

12. UTT Reset

13. Channel Mute

14. Debug Status

15. NVRAM Type

16. HDEV

17. Blue back

18. China Cable SO

19. Booster On (VHF)

20. Booster Off (VHF)

21. Booster On (UHF)

22. Booster Off (UHF)

Changes

to “Doing”

9600

On Off On On On

HDMI Port1

Enhanced Ghost

Off

Reset

RELEASE

EEPROM

Off

On On

0 0 0 0

Note: After UTT is reset, the UTT time on the left will

not reset to “0” until the Service Menu is exited.

Scroll to

(System 1)

then

Right Cursor

Scroll to

(UTT Reset)

Press (Select)

Reset changes to Doing

then back to Reset

August 2011 37LK450 LCD-DV

After Reset (Doing) has

completed, Reset returns.

After Exit the UTT Timer is

“0”

37LK450 Model Number Download Screen

Leandro Palmeira

When the Main Board is replaced, the Model Number and Serial Number must be corrected. Follow these instructions

Model & Serial Number

IN SART

Model Name: 37LK450-UA Serial Number: 010LGPT00036 S/W Version: MICOM Version SPI Boot Version BOOT Version IR LED Version EDID Version (RGB) EDID Version (HDMI) Chip Type Debug Status

UTT : 12 APP History Ver.:321 PQL DB:AUO_CF_LGT10_XXXXXX

: 01.05.01.01 : 0.05.3 : 3.00.01

Select Item 6

: 1.00.01 : 11.0 : 0.01 : 0.02 : SATURN 7R : RELEASE

1. Adjust Check

2. ADC Data

3. Power Off Status

4. System 1

5. System 2

6. Model Number D/L

7. Test Option

8. External ADC

9. Spread Spectrum

10. Sync Level

11. Stable Count

12. ODC Test

TO CHANGE THE MODEL/SERIAL NUMBERS:

1) Use the cursor right or left to select the area to change.

2) Use the cursor up or down to change.

Bring up the Service Menu using the Service Remote. Scroll down to item 6. Model Number D/L to highlight. Press “ENTER” or “Cursor Right”.

Model Number D/L

0. Model Name

1. Serial Num.

37LK450-UA

010LGPT00036

Press OK to Save

Note: The Model and Serial Number will not change

until “IN-START” is pressed or exiting the In-Start

Menu and then returning to the In-Start Menu.

3) Press “ENTER” to Save the new data.

3) Cursor right until there is no text cursor blinking.

4) Cursor down to highlight “Serial Number” and change

according to steps 1 and 2 above.

5) Press “ENTER” to Save, then press “EXIT”.

August 2011 37LK450 LCD-DV

34LK450 EDID Download Screens

Leandro Palmeira

EZ ADJUST

0. Tool Option1

1. Tool Option2

2. Tool Option3

3. Tool Option4

4. Tool Option5

5. Country Group

6. ADC Calibration

7. White Balance

8. 10 Point WB

9. Test Pattern

10. PCM EDID D/L

11. AC3 EDID D/L

12. Sub B/C

13. Touch Sensitivity Setting

When Item 11 was selected

PCM EDID D/L

HDMI1 OK/(PCM)

HDMI2 OK/(PCM)

HDMI3 OK/(PCM)

RGB OK/(PCM)

Start Reset

AC3 EDID D/L

HDMI1 OK/(AC3)

HDMI2 OK/(AC3)

HDMI3 OK/(AC3)

RGB OK/(AC3)

Start Reset

If Item 5 on Adjust Check in the 1

page of the Service Menu shows EDID PCM this shows OK(PCM)

If Item 5 on Adjust Check in the 1 AC3, this shows NG.

If NG was shown, highlight “Start” and press Select on the remote. “Writing” appears, then OK/(PCM) shows here. Now Item 5 on Adjust Check in the 1st page of the Service Menu shows EDID PCM.

If Reset is selected, Erasing will appear and then this shows “NG”.

When Item 12 was selected

If Item 5 on Adjust Check in the 1

page of the Service Menu shows

EDID AC3 this shows OK(AC3)

If Item 5 on Adjust Check in the 1 PCM, this shows NG.

page of the Service Menu shows

If NG was shown, highlight “Start” and press Select on the remote. “Writing” appears, then OK/(AC3) shows here. Now Item 5 on

Adjust Check in the 1

page of the Service Menu shows EDID AC3.

If Reset is selected, Erasing will appear and then this shows “NG”.

August 2011 37LK450 LCD-DV

37LK450 Product Dimensions

Leandro Palmeira

Wattage MAX: 180W AVG: 150W STBY: <0.1W

25-3/16"

640.08mm

22-1/2"

571.5mm

Center

14-1/8" 358mm

Model No.

Serial No.

Side Label

11-1/4"

285.75mm

Remove 4 screws to remove

stand for wall mount

7-7/8"

200mm

35-7/8"

835.66mm

7-7/8"

200mm

Center

76.2mm

17-15/16"

455.61mm

8-1/4"

210mm

Center

12-5/8"

319.88mm

6-11/16"

170mm

2-11/16"

68.26mm

Weight without Stand: 24.5 lb Weight with Stand: 28.2 lb

19-5/16"

490mm

10-3/8"

264.16mm

August 2011 37LK450 LCD-DV

DISASSEMBLY SECTION

Upon completion of this section the Technician will have a better

Leandro Palmeira

This section of the manual will discuss Disassembly, Layout

(Circuit Board Identification) of the 37LK450 LCD Direct View Television.

understanding of the disassembly procedures, the layout of the printed

circuit boards and be able to identify each board.

Disassembly:

August 2011 37LK450 LCD-DV

+ 64 hidden pages