LG 32LD350 Training Presentation February 23rd 2011

32LD35032LD350720P 32LD35032LD350Direct View LCDDirect View LCD

720PDirect View LCD

Training

LCD-DV Troubleshooting32" Class HD 720P

LCD TV (31.5" diagonally)

Published November 16th, 2010Updated February23rd, 2011

OUTLINEOUTLINE

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

Troubleshooting Section: Board Operation Troubleshooting of :

Signal Distribution, Disassembly Instructions and Voltages

Disassembly Section: Removal of Circuit Boards

• Switch Mode Power Supply

• Ballast (Backlight Driver)

• Main Board

• Ft Control Board

• Key Board

• Speakers

November LCD TV 32LD3502

32LD350 LCD Direct View Display

Overview of Topics to be DiscussedOverview of Topics to be Discussed

32LD350 LCD Direct View Display

Section 1This 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.

Thi S ti ill t th T h i i f ili ith th Di bl Id tifi ti dThis Section will get the Technician familiar with the Disassembly, Identification and Layout of the LCD Display Panel.

f S f CAt 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.


IMPORTANT SAFETY NOTICEIMPORTANT SAFETY NOTICE

Preliminary Matters (The Fine Print)Preliminary Matters (The Fine Print)

IMPORTANT SAFETY NOTICEIMPORTANT SAFETY NOTICE

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 foruser 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.

CAUTIONCAUTIONCAUTIONCAUTION

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 g p p , p y p g yaware 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.


ESD NoticeESD Notice (Electrostatic Static Discharge)(Electrostatic Static Discharge)

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 orremoving 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.

l fl fRegulatory InformationRegulatory Information

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 g p p ginterference 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 isradio 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.


LG Contact InformationLG Contact Information

Customer Service (and Part Sales) (800) 243-0000T h i l S ( d P S l ) (800) 84 9Technical Support (and Part Sales) (800) 847-7597USA Website (GSFS) http://gsfs-america.lge.comCustomer Service Website http://www.us.lgservice.comgKnowledgebase Website http://lgtechassist.comLG Web Training https://lge.webex.comLG CS L i A d htt //l l /il

Presentations with Audio/Video and Screen Marks

New: 2010 Models Wireless Ready Software Downloads for

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

32LD350 32LG40 32LH30 37LH55 42LG60 42LG70 42LH20 42LH40 42LH50 42LH90

http://136.166.4.200Training Manuals, Schematics with Navigational Bookmarks, Start-Up Sequence, Owner’s Guides,

Interconnect Diagrams, Dimensions, Connector IDs, Product Pictures and Features.

32LD350, 32LG40, 32LH30, 37LH55, 42LG60, 42LG70, 42LH20, 42LH40, 42LH50, 42LH90, 42SL80, 47LG90, 47LH85, 42LE5500, 42LX6500 (3D), 47LX9500 (3D), 55LX6500 (3D)42PG20, 42PJ350, 42PQ20, 42PQ30, 50PG20, 50PJ350, 50PK250, 50PK750, 50PS80, 50PK950, 50PS60, 60PK750, 60PK950, 60PS11, 60PS60, 60PS80

LCD-DV:

PLASMA:

Published July 2010 by LG Technical Support and TrainingLG El i Al b I

Also available on the Plasma Page:PDP Panel Alignment Handbook,

Plasma Control Board ROM Update (Jig required)New Training Materials on the New Training Materials on the

Learning Academy siteLearning Academy site


LG Electronics Alabama, Inc. 201 James Record Road, Huntsville, AL, 35813.

Safety and Handling Regulations

LCD Direct View OverviewLCD Direct View Overview

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.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 5 e cau ous o os sc e s a d o e e a objec s o p e e a poss b e s o e

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 matches2. 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…


Basic Troubleshooting StepsBasic Troubleshooting Steps

Define, Localize, Isolate and Correct

•Define Look at the symptom carefully and determine what circuits could be causing 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 forand 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 After carefully checking the symptom and determining the circuits to be checked and after giving a thorough examination using your senses the first check shouldchecked 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 To further isolate the failure, check for the proper waveforms with the 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 failureglitches or road bumps will be an indication of an imminent failure.

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


perform a Safety AC Leakage Test before returning the product back to the Customer.

32LD350 PRODUCT INFORMATION SECTION32LD350 PRODUCT INFORMATION SECTION

This section of the manual will discuss the specifications of the32LD350


LCD Direct View Display

Basic SpecificationsBasic Specifications

Key TV Features• High Definition Resolution

70 000 1 D i C t t R ti• 70,000:1 Dynamic Contrast Ratio• Picture Wizard II (Easy Picture Calibration)• Smart Energy Savinggy g• AV Mode (Cinema, Sports, Game)• Clear Voice II• ISFccc® Ready ISFccc® Ready• 24P Real Cinema• 2 HDMI™ 1.3 Inputs

SIMPLINK™ C ti it• SIMPLINK™ Connectivity• Dolby® Digital 5.1 Decoder• Infinite Sound


HD RESOLUTION 720p HD Resolution Pixels: 1365 (H) × 768 (V)

Logo Familiarization Page 1 of 2Logo Familiarization Page 1 of 2

HD RESOLUTION 720p HD Resolution Pixels: 1365 (H) 768 (V)High definition television is the highest performance segment of the DTV system used in the US. It’s a wide screen, high-resolution video image, coupled with multi-channel, compact-disc quality sound.

Picture WizardPicture WizardGet 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. It's not actually magic, but it will sure seem

Save Energy, Save MoneyIt reduces the television display’s power consumption.The default factory setting complies with the Energy Star

y gthat way.

The default factory setting complies with the Energy Star requirements and is adjusted to the comfortable level to be viewed at home.

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


noise swells.

Logo Familiarization (Additional FeaturesLogo Familiarization (Additional Features) Page 2 of 2) Page 2 of 2With AV Mode, you can easily select from one of three picture modes for “Cinema,” “Sports,” or “Games” to enjoy an optimized picture and sound , p , j y p pexperience.

Enjoy a true cinema-like experience in your own home with movies the way they are meant to be seen. LG's Real Cinema technology displays 24p source f

LG’s ISFccc Ready HDTVs contain the detailed standards necessary for professional calibration of brightness, contrast, tint, sharpness, color levels and much more to meet local lighting conditions for both day and nighttime viewing.

frames

HDMI (High-Definition Multimedia Interface) is a compact audio/video interface for transmitting uncompressed digital data.

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.

Dolby Digital (AC3) the reigning standard in surround sound technology

LG SimLink is a brand specific type of HDMI CEC which allows you to control multiple HDMI components through a single television remote.

To see it real is to hear it real. LG's Infinite Sound, which is tuned by the well-known sound specialist Mr. Mark Levinson, enhancements your High

Dolby Digital (AC3), the reigning standard in surround-sound technology, produces 5.1-channel surround sound at the movies and in your home theater.


y gdefinition TV experience with maximum surround sound.

32LD350 Remote Control32LD350 Remote ControlTOP PORTION

BOTTOM PORTION


p/n AKB72915206

Accessing the Service MenuAccessing the Service Menu

To access the Service Menu.1) You must have either Service Remote. )

p/n 105-201M or p/n MKJ391708282) Press “In-Start”3) A Password screen appears.4) Enter the Password.)

Note: A Password is required to enter the Service Menu. Enter; 0000Se ce e u te ; 0000

Note: If 0000 does not work use 0413.


MKJ39170828105-201M

TV Rear Input / Output JacksTV Rear Input / Output Jacks

Rear In/Out Jacks

Side In/OutUSB for Software Upgrades, Music and Photos

Rear In/Out Jacks

USB 1

HDMI 2

USB 1

HeadPhones

MAIN BOARDRear and Side

Input/Output locations Component Inputs


Inputs

1) Create an LG_DTV folder on the USB Flash Drive

USB Automatic Software Download InstructionsUSB Automatic Software Download InstructionsCurrently Installed Version

Software Version

found on the USB Flash

DriveDrive

File found on the USB Flash Drive

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 drive3) With TV turned on, insert USB flash drive.4) You can see the message

“TV Software Upgrade” (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”

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


COMPLETE . 9) Your TV will be restarted automatically.

Software Files are available fromthe GSFS or GCSC web sites.

4) Cursor Left to only highlight the briefcaseon the left

Accessing the Host Diagnostic Screen Accessing the Host Diagnostic Screen (Page (Page 1 of 2)1 of 2)

1) Place Television on a digital channel.

2) Bring up the Customer’s Menu and highlight Options

on the left.

3) The Option Menu appears5) Press the (1) Key 5 to 8 times.


See next page for more details.

Host Information

Memory

Host Release Version

FAT Status (Main)

Current Channel (Main)

DVI/HDMI StatusCan’t display this information now

Channel Info : Digital 19-2

Parental Control : Channel is not blocked

Host Diagnostics

Model Name : 32LD350-UB (Liquid Crystal Display)

FLASH : 16384 KBDRAM : 131072 KBNVM : 64 KB

Firmware Version(MP) : 3.05.00(0.1.58.22)Micom Version : 3.02Compile Date & Time : 20100126 & 08:56:56Compile User : jh.jung

Center Frequency : 663.00 MHzPCR lock : LockedModulation mode : QAM 256Carrier lock status : LockedSNR : 36 dBSignal level : 99 dBmV

Half Page Move Page ExitCH

18

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

November 2010 32LD350 LCD-DV

Channel Selected

Software Version

Blocked or not Blocked

Channel Frequency

Program Clock Reference (Locked or No)Channel Type (8VSB, QAM 64, 256)

Channel (Locked or No)Channel Signal to Noise Ratio

Channel Signal Level (Above 80dBmV good)

8VSB (Above 20 is good)QAM 64 (Above 24 is good)

QAM 256 (Above 30 is good)

Service Menu: Downloading EDID Data Pg 1 of 2Service Menu: Downloading EDID Data Pg 1 of 2

1) Press “ADJ” key on the 2) Scroll down to Item 8 “EDID D/L” 3) Opening EDID D/L screen Service Remote. and press the Select Key. appears.

Continue on next page.


Service Menu: Downloading EDID Data Pg 2 of 2Service Menu: Downloading EDID Data Pg 2 of 2

4) Highlight “Reset” then press “Select” key. Erasing begins.

5) After Erasing, EDID now indicates “NG”.

6) Highlight “Start” then press “Select” key Writing begins

7) After Writing completes, EDID now indicates “OK”Select key. Writing begins. EDID now indicates OK .


21

7-7/8"200mm

2-3/16"55.56mm

31-1/2"800mm

Remove 4 screws to remove stand for wall mount

Model No.Serial No.Side Label

11-3/4"298mm

15-3/4"400mm

2-7/8"73.66mm

8-1/8"205.74mm

Center

3-15/16"100mm

Weight without Stand: 24.3 lbWeight with Stand: 27.6 lb

6-5/16"160mm

11 1/8"281.78mm

10"254mm

20"508mm

22-3/16"563.88mm

WattageAVG: 110WSTBY: <1W

32LD350 Product Dimensions32LD350 Product Dimensions


DISASSEMBLY SECTIONDISASSEMBLY SECTION

Disassembly:This section of the manual will discuss Disassembly, Layout

(Ci it B d Id tifi ti ) f th 32LD350 LCD Di t Vi T l i i(Circuit Board Identification) of the 32LD350 LCD Direct View Television.

Upon completion of this section the Technician will have a better understanding of the disassembly procedures, the layout of the printedunderstanding of the disassembly procedures, the layout of the printed

circuit boards and be able to identify each board.


Removing the Back Cover Removing the Back Cover

Remove the 20 screws indicated.Pay attention to th i d t

Putting in an improper screw

when the size and type of screw

as there are many different types.

reassembling may Cause

damage.

Stand Base is GlassHandle with Care


The Stand does not have to be removed before removing the back.

Clips hold front frame in place, use caution. Suggest adding screw while servicing.

Warning: The Frame may

Board LayoutBoard Layout

g yhave sharp edges

Ballast Panel Interface Board

LVDS Cable

P S l

M i B d

Power Supply(SMPS)

Main Board

KeyboardAC Input

IR/LED InvisibleInvisible


IR/LED Board

InvisibleSpeaker Left

InvisibleSpeaker Right

POWERSUPPLY

Speaker (Front Left)

AC In

IR

32LD350 Connector Identification Diagram32LD350 Connector Identification Diagram

25 November 2010 32LD350 LCD-DV

Speaker (Front Right)

Key Board

p/n: EBR64965302

p/n: EAJ60890301

p/n: EAB60961401

SK100

P402

P2401P600

J1

J2

P3000

If the Panel is replaced, reset the UTTTime. Service Menu, System Item 18

P201

SMPS Used in the 32LD350:EAY60868901 32LD350 AUSWLJR or AUSDLFR or AUSDLUR or AUSDLJR

EAY60869101 32LD350 CUSWLH or CUSDLH or CUSWLHO

Main Boards Used in the 32LD350:EBU60850009 32LD350 AUSWLJR and AUSDLFREBR66049702 32LD350 AUSDLJREBU60850010 32LD350 AUSDLUREBU60850003 32LD350 CUSDLHEBU61005102 32LD350 CUSWLH and CUSWLHO

PanelInterface

BallastP203

CN1P802

MAINBOARD

p/n: EAB60961401

p/n: EB

R65863602

AUSWLJR, AUSDLFR, AUSDLJR, AUSDLUR, CUSDLH

CUSWLH, CUSWLHOp/n: EAJ60870501

TFT PANEL

Panel Board

Power Supply Board RemovalPower Supply Board Removal

P201

p/n EAY60868901

Disconnect P201, P203 and AC In

SK100. Press in gently on the two tabs

to release lock

Remove the 4 screws indicated

SMPS Used in the 32LD350:EAY60868901 32LD350

AUSWLJR or AUSDLFR or AUSDLUR or AUSDLJR

EAY60869101 32LD350SK100by the arrows.

AC In

EAY60869101 32LD350 CUSWLH or CUSDLH or

CUSWLHO


Removing the Main BoardRemoving the Main Boardp/n EBU60850009

Press inward on the two locking tabs and pull the

connector out.Flip the locking tab upward,

pull the LVDS ribbon out.Disconnect P402, P802,

P600, and P2401

P402

Remove any tape holding down any cables.

Remove the 4 screws N/C

P802

indicated by the arrows.

Decorative Metal PlateRemove decorative N/C

NOTE: Always check on

plastic and remove the board.

P2401After removing the Main, there are tabs sticking through the Main board holding the Metal

plate in place.

P600

top and behind the Large ICs. And look for a piece

of Chocolate(Heat Transfer Material).

Be sure to transfer to new Board if present

Main Boards Used in the 32LD350:EBU60850009 32LD350 AUSWLJR and AUSDLFR

EBR66049702 32LD350 AUSDLJR


new Board if present. EBU60850010 32LD350 AUSDLUREBU60850003 32LD350 CUSDLH

EBU61005102 32LD350 CUSWLH and CUSWLHO

Removing the BallastRemoving the Ballast Ballast comes with the Panel

Remove the 6 screws indicated by the arrows.

Remove the Inverter Cover.

Disconnect CN1.

Use caution do not allow screws to fallUse caution, do not allow screws to fall.

NOTE: If Servicing the Board, return the screws to provide stability and grounding.

CN1

Lift the Board up slightly on the right side and slide the

board to the right to release the board from the Backlight

connectors.

Backlight connector


After Removing the BallastAfter Removing the Ballast

Cushion pieces behind

the Inverter

NOTE: After removing the Inverter, pay attention to the Cushions behind theattention to the Cushions behind the

Inverter. Make sure to return them to there correct positions if they should fall or pull

off with the board.Connectors to the Backlights.The Inverter board slides into

these connectors.

Cushion pieces behind

the Inverter


Removing Front IR BoardRemoving Front IR Boardp/n EBR64965302

Disconnect J1 and J2 connectors.

Remove the 1 screw and pull the board forward.

J2

IR board / Intelligent SensorIR board / Intelligent Sensor


TROUBLESHOOTING SECTIONTROUBLESHOOTING SECTION

Troubleshooting:gThis section of the manual will discuss troubleshooting.

Upon completion of this section the Technician will haveUpon completion of this section the Technician will have a better understanding of how to diagnosis and resolve

problems.


POWER SUPPLY SECTIONPOWER SUPPLY SECTION

This switch mode power supply develops Stand By 3.5V at all times when AC is applied.at all times when AC is applied.At power on, it develops 12V and 24V for the Main boardAnd 24V for the Ballast.This power supply draws less than 1 watt during stand by p pp y g ymode. The fuse F501 reads 0V (from hot ground) during this time.

When the controller chip receives the POWER-ON command 3 28V via P201 Pin 1 the primary section turnscommand 3.28V via P201 Pin 1, the primary section turns on. The Primary fuse F501 now reads 388V.

P201 Connector: (To Main Board)12V is routed out P201 pins 17, 19 and 21 and 24V is routed out P201 pins 2, 3 and 4.

P203 Connector: (To the Ballast)24V is routed out P204 pins 1 through 5.

Other SMPS Used in the 32LD350:EAY60868901

32LD350 AUSWLJR or AUSDLFR or AUSDLUR or AUSDLJR

EAY60869101



Power Supply (SMPS) Board LayoutPower Supply (SMPS) Board Layout p/n EAY60868901

F501

Hot Gnd

Cold Gnd

F5013.15A/250V

STBY 0VRun 388V

From Hot Gnd

Hot Ground Shock Hazard

F1005A/250V


5A/250VAC Protect

To Backlights

BALLAST

T-CON Inside Panel12V LVDS

Along with VideoOn LVDS cable

Inverter OnStarts the Ballast.Backlights Light.

24V B+ for the BallastBridge

Stand By 3.5V

Power ButtonOr Remote Key

Reset ofMain Board

MAINBOARD

5V_NormalSwitch IC406

POWER_ON INV

On

24VRegulator

12V/24V Regulators

StandBy 3.5V Reg

1

2 5 55 7

7

5

4

5

5

Primary side fuse:Stand-By 0V Run 390V

3

12V 24V

12V SwitchQ40912V

6

8

At point TV is in Stand-By state. Energy Star compliant.Less than 1 Watt

3

BR1 FixedAnalog Dimming Manipulates Backlights

Pow

er On

2

7No AC Det

in this model

LVDS Panel ControlInv On/Off

Mstar Microprocessor IC100Also Video Processor

LVDSVideo

12V

RL_ON

AC In

Ft Control

24V

INV On

8

IC103Q108

32LD350 Television Start Up Sequence32LD350 Television Start Up Sequence

November 2010 32LD350 3D-LCD 34

PWM-DIMDigital Dimming

Manipulates Backlight Brightness

Variable by Cust Menu for BacklightAnd Picture Content

PWR_On/Off_1 5

+3.3V_AVDD_MPLL IC400

5V_USBIC401

Q402

Q4011.8V_AMP

IC601

3.3V_NormalSwitch IC405

Audio_AMPIC600

5 7

2

6

POWER SUPPLY (SMPS)Rectifier

RelaySecondary

5

Primary

Q405

8

IC405

32LD350 P403 on Main to SMPS P201 Television Turn On Circuit32LD350 P403 on Main to SMPS P201 Television Turn On Circuit

November 2010 32LD350 3D-LCD

R189

R201

100Ω

PWR ON3.28VPWR OnPWR_ON

A.DIM

INV.On

PWM-DIM

AB12

IC100Mstar

PWM2

GPIO 097

100

H5R245100

GPIO137

3.5V_ST

3.41V

24V

SAR0

L404

Q402R406

R421 10KΩ

GPIO 136

R244 100Ω INV CTL

2

6

D

8

Q409

+5V NormalL422

Panel VCC (LVDS 12V)

R459 10KΩ

2.39V

1.84VGQ406Q407

PANEL_CTL

L417

R42947KΩ

0.03V

R439 10KΩ

R440 1.8KΩ

E9

C401100uF

RL_On

Error_Out

P-DIM

24.19V

3.32V

4.7K

35

P403MAIN Board

2

1

4

3

6

5

8

7

10

9

11

12

14

13

16

15

18

17

20

19

22

21

23

24

2

4

3

6

5

8

7

10

9

11

12

14

13

16

15

18

17

20

19

22

21

23

24

SMPSP201

1

3.41V

3.41V

3.41V

Q401

0.68V0.02V

11.97V11.97VS 12V

12VIC406 11.97V

F6100

R251GPIO 138

Power On/Off 1

7

L412

3.5V_ST

2

6

8

+3.3V NormalL421

R456 10KΩ

2.39V L41612V11.97V

724.19V

24.19V24V

N/C

Gnd

Gnd

Gnd

Gnd11.97V

11.97V

11.97V

12V 12V

12V

12V

0.59VERR Out

4.49V

2.46V

Q405

G5

+3.3V Normal

R4191KΩ

N/C

R473 0Ω

+3.3V Normal R486 4.7KΩ

R472 0Ω

R479 0Ω

R424 0Ω

THREE STEP TURN ON PROCESS:Stand-By: STBY_3.5V arrives on main. Powers up MStar (Micro / Video Processor) Reset occurs. Then when a power on from the Key board or IR arrives, 3 step process begins.Step 1) RL_ON: Turns on the SMPS. 12V and 24V 12V arrives on Main, Power_Det sent to Mstar. 1b) MStar turns on IC405 and IC406.Step 2) Panel_CTL: Turns on Panel VCC Q409, sent to panel.Step 3) INV_CTL: Turns on the Backlights, to SMPS then Ballast.

A-DIM Pin 22: (Silk Screened P-DIM) Is not unsed.

Error_Out Pin 20: (Silk Screened A-DIM)Goes high (3.3V) when the backlights are told to come on. Goes back low when they light.If it goes high again on the 5th attempt to fire thebacklights, the set shuts off.

PWM2PWM-DIM

E5R401

10K R237100Ω

A4

B4SAR1

KEY 1

KEY 2C4

R1930Ω

IR IRIN

D4 HWRESETS5/S6 Reset

XIN B3

XOUT A3

X10012MHz

0.64V12

3

0V

0.89V

3.39V

3.28V

0V3.32V

4.99V

3.35V

H6PowerDetIC408

2

Step 3

Step 1Step 2

Step 1b

Power On Key 2

drops to 0.52V

IC103

Pin 9 P2401

Pin 5 P24013.4V

Normal

Note: When AC is applied, the SMPS “MUST” be producing STBY 3.5V on pins 9, 10, 11 or 12 of P201.

Power Supply Board Test Power Supply Board Test

If 3.5V Standby is not being generated, make sure AC is arriving atthe connector SK101. If it is, the SMPS is defective and must be replaced. There is no need to continue with the next test.next test.

AC Should not be applied at any time while adding jumper or While unplugging connectors as damage to the circuit Board may occur.

(b) Unplug P402 on the Main Board to make insertion of the Jumpers easier. Use P402 Side to insert resistors

TEST PROCEDURE: Backlights will turn on during this test

Pin 1 is the Brown Wire

(A) Add a jumper between (3.5V STBY) pin 7, 8, 9 or 10 and Pin 1 (PWR_ON). Apply AC. This will turn on the power supply, relays will click.a) Check that the 24V and 12V power supplies are turned on,

• P201 (12V pins 17 19 and 21) P201 (24V pins 2 3 and 4) P203 (24V pins 1~5)

Backlights will turn on during this test

• P201 (12V pins 17, 19 and 21) P201 (24V pins 2, 3 and 4) P203 (24V pins 1~5)

The Backlights should turn on at this point. If the 24V and the Inverter On command is arriving at the Ballast, but no backlights, then see Ballast Section for further testing.


(B) Remove AC power and Remove Jumper. SMPS and Ballast are OK.

Power Supply Connector P201 Voltage and Diode CheckPower Supply Connector P201 Voltage and Diode Check

P201 Connector “SMPS” to “Main” P402Press in gently on the two tabs

to release lock P201

Pin Label STBY Run Diode Check

1 (1) PWR-ON 0V 3.28V 1.16V

2-4 24V 0V 24.19V 0.73VOdd pins are on the left.

(1) PWR_ON Pin 1 Turns on 12V, 24Vto the Main and 24V to the InverterP203 Pins 1~5

5-8 GND Gnd Gnd Gnd

9-12 3.5V 3.41V 3.41V Open

13-15 Gnd Gnd Gnd Gnd

16 n/c n/c n/c Open P203 Pins 1~5.

(2) INV_ON Pin 18 (To P203 pin 12) Turns on the Backlights.

(3) Error Pin 20 (From P203 pin 11 Silk Screened A-DIM) Goes high when the backlights are told to come on. Goes

16 n/c n/c n/c Open

17 12V 0V 11.97V Open

18 (2) INV-ON 0V 3.32V Open

19 12V 0V 11.97V Open g gback low when they come on. If it goes high again on the 5th attempt to fire the backlights, the set shuts off.

(4) A-DIM Pin 22 (To P203 pin 13 Silk Screened PWM-DIM) Is not used.

20 (3) ERROR 0V 0V Open

21 12V 0V 11.97V Open

22 (4) A-DIM 0.3V 4.49V Open

23 n/c n/c 0V Open

Diode Mode values taken with all Connectors Removed

(5) PWM-DIM Pin 24 (To P203 pin 14 Silk Screened Error_Out) can vary according to incoming video IRE level and OSD Backlight setting Output from the Video Processor IC100. Range 0.65V to 3.25V.

23 n/c n/c 0V Open

24 (5) PWM-DIM 0V 0.65V~3.25V Open


Power Supply Connector P203 Voltage and Diode CheckPower Supply Connector P203 Voltage and Diode Check

P203 "SMPS" to CN1 “Ballast"P203


1-5 24V 0V 24.19V 0.73V

6-10 GND Gnd Gnd Gnd6 10 GND Gnd Gnd Gnd

11 (1) ERROR 0V 0.59V Open

12 (2) INV_ON 0V 3.31V Open

13 (3) A-DIM n/c 4.5V Open

14 (4) P-DIM 0V 0.65V~3.25V Open 1

(1) Error Pin 11 (To P201 pin 20 Silk Screened A-DIM) Goes high when the backlights are told to come on. Goes back low when they come on. If it goes high again on the 5th attempt to fire the backlights, the set shuts off.

(2) INV_ON Pin 12 (From P201 pin 18) Turns on the Backlights.

(3) A-DIM Pin 13 (From P201 pin 22 Silk Screened PWM-DIM) Is not used.

(4) PWM-DIM Pin 14 (From P201 pin 24 Silk Screened Error_Out) can vary according to incoming video IRE level and OSD Backlight setting Output from the Video Processor IC100. Range 0.65V to 3.25V.



Power Supply Power Supply Fuses and Fuses and Connector SK100 Voltage and Diode CheckConnector SK100 Voltage and Diode CheckSK100 "SMPS" to AC IN

Label STBY Run Diode Check

L120Vac

OL

N OL

Bottom Left of SMPS

F100F501

F5013.15A/250V

F1005A/250V

AC IN

L N

N

3.15A/250V

From Hot GndSTBY 0VRun 388V

SK100L

N

If di th lt F501 i ht ft

F100 (Diode Check)Red or Black Lead on Fuse (Open)

Other Lead on Hot Ground

If reading the voltage on F501 right after power off, it takes a very long time to bleed down to the reading given here.



BALLAST SECTIONBALLAST SECTION

The Ballast receives 24V from the SMPS on CN1 pins 1~5. The Inverter On (INV ON) command arriving on CN1 pin 12 starts the Ballast drive signals, (120Hz).g p g , ( )P-DIM is delivered from the Main board through the SMPS to the Inverter on CN1 pin 14.The Ballast responsible for delivering approx. 1.2kV to each of the 8 Cold Cathode Florescent bulbs. This is accomplished by 8 step-up transformers, 1 for each lamp.

Cover On Cover Off


Ballast Component and Connector IdentificationBallast Component and Connector IdentificationTop Half

Bottom Half

CN1

24VFuse


IC100MStar

A-DIM

PWM-DIM

INV On/Off

3.32V

VBR-B (PWM Diming) Manipulates the Backlight Brightness via Customer’s OSD.Manipulates the Backlight Brightness via the BCM Chip. Darker Picture, Darker Backlights to facilitate improved Contrast Ratio. 0.65V ~ 3.25V Range

INV-On/Off

AB12 PWB-2

Q40518

24

G5

A-DIM (Analog Diming) Fixed Voltage, this line is not used.

P402

POWER SUPPLY

RL-ONPWR3.41V

E51

12VReg 21

4

CN1

2

5

4

1

BALLAST

12INV On/Off

4.49V

14

13BR1

PWM-DIM

24VReg3

ERR 0.59V2011ERR

P201P203 MAIN PWB

18

24

22

1

17

2

20

24V

2

5

4

1

12

14

13

3

11


32LD350 Main Board to Ballast Turn On Commands32LD350 Main Board to Ballast Turn On Commands

42

Q401Q402

3.3V_Normal

12V

24V

9 10 11 12 3.5V_ST

19

3

ErrorE5

22 n/c

24.19V

11.97V

Error Normal is Low. But when the backlights are told to fire via INV_ON, this line goes high. When they fire, it goes back low. If they fail to light after 5 attempts, the set shuts off.

Controller

24V

6 7 8 9 10

Inverter Component DC Checks for TroubleshootingInverter Component DC Checks for Troubleshooting

Q110 Q104 Pin 2 at 2MSec per/div Pin 3 at 2MSec per/div

Q106Pin 1Pin 2Pin 3

Gnd9.03V4.58V

Q108

Q101, 3, 4, 6, 7, 8, 9, 10configurations are the same.

3

1

Pin 3 4.58V

Q103Q109

Q107Q101

Pin 2 at 2MSec per/div Pin 3 at 2MSec per/div

12.74V p/p 80% PWM-DIM 28.92V p/p 80% PWM-DIMg

23

30V / 80% PWM DIM

Q109Pin 1Pin 2Pin 3

24.16V9.03V

0V

Q101

15 15V / 80% PWM DIM30V p/p 80% PWM-DIM

U1Pi 1 0V

15.15V p/p 80% PWM-DIM

Checking T103 ~ T110

Pin 1Pin 2Pin 3

0VGnd

24.07V


Warning: Pin 4 has 1.2Kv p/p

PWMPWM--DIM (Global Dimming) Explained: PDIM (Global Dimming) Explained: P--DIM DIM (PWM(PWM--DIM may also be called PDIM may also be called P--DIM, VBRDIM, VBR--B, PDS, BCMB, PDS, BCM--VBRVBR--B)B)


Inverter (Main) Fuse F101 CheckInverter (Main) Fuse F101 CheckCenter Right of the BoardJust under CN1 Connector Inverter (Main)

CN1

F1 (Di d M d Ch k)F1 (Diode Mode Check)Open (Red Lead on Fuse)0.9V (Black Lead on Fuse)

F101F1017A


Backlight Drive Signal PWMBacklight Drive Signal PWM--DIM EffectsDIM Effects


Inverter CN1 (Voltage and Diode Check)Inverter CN1 (Voltage and Diode Check)

CN1 "Inverter Main" Connector To P203 "SMPS"

Not Used


14 (1) P-DIM 0V 0.65V~3.25V Open

13 (2) A DIM 0V 4 5V O13 (2) A-DIM 0V 4.5V Open

12 INV_ON 0V 3.31V Open

11 (3) ERROR 0V 0.59V Open

6~10 GND Gnd Gnd Gnd

Inverter On Control

6 10 GND Gnd Gnd Gnd

1~5 24V 0V 24.19V Open1

(1) P-DIM Pin 14. PWM_DIM can vary according to OSD Backlight setting and the incoming video IRE level. PWM-DIM is Output from the Video Processor IC100. Range 0.65V to 3.25V.

(2) A-DIM Pin 13. Not Used

(3) ERROR Pin 11. Normal low. Goes high when the Backlights are told to turn on by INV_ON. After backlights fire, go back low. Will repeat 5 times then shut off the set.



MAIN BOARD SECTIONMAIN BOARD SECTIONThe Main board receives its operational B+ from the Power Supply via P402. There is only one LVDS cable that feeds to a Panel Interface board. The LVDS cable feeds 10 bit LVDS Video signals and 12V through the Panel Interface board to the Panel These signals have notLVDS Video signals and 12V through the Panel Interface board to the Panel. These signals have not been prepared for the Panel’s H and V boards. This is done in the panel itself.The Main board also includes the Tuner, Audio and Audio/Video inputs and selection circuits.

STAND BY RUNInput Voltages from SMPS.

STAND-BY• STBY 3.5V (P402 pins 9~12)

The Main board also develops several B+ sources on the board.

RUN • 12V pins 13 and 14 • 24V pins 17, 19 and 21.

LVDS• Panel_VCC (12V Not generated, but switched

from the 12V arriving from the SMPS) AUDIO

STAND-BY VOLTAGES• 3.3V_ST (Voltage direct from SMPS)

GENERAL• 5V_Normal (From 12V from SMPS)• 5V_EXT• 5V USB (From 12V from SMPS)

from the 12V arriving from the SMPS). AUDIO• 1.8V (Made from 3.3V_Normal)• 24V (From Power Supply)

MStar IC100 Video Processors

TUNER and VSB CIRCUIT • 5V_TU (Made from 5V_Normal)• 3.3V_TU (Made from 3.3V_Normal)• 1.26V (Made from the 3.3V TU)

• 1.2V, D1.5V, D1.8V_DDR, 1.26V_VDDP, 3.3V_VDDP, +3.3V_AVDD_MPLL

•T-CON IC9001

1.26V (Made from the 3.3V_TU)• +1.2V_PVSB (Made from 3.3V_TU)• +3.3V_PVSB (Made from 3.3V_TU)

WIRELESS VOLTAGES• 24V (Switched from 24V from SMPS)


•T-CON IC9001• 3.3V_VCC, -5V_VGL, 27V_VGH,

16V_VDD and HVDD (7.8V)

24V (Switched from 24V from SMPS)

Main Board LayoutMain Board LayoutVIDEO PROCESSOR

IC100 runs Hot. This is normal.

P402To SMPS

See next page for component identification

P802To Panel Interface

HDMI

USB

IC100

Headphones

HDMI

RS232

SideComposite

Inputs

PC PCAudio

OpticalAudio

TUNER

P600To Speakers

P2401 ToFront IR EBU60850003 32LD350 CUSDLH (The one shown)

EBU60850009 32LD350 AUSWLJR and AUSDLFREBR66049702 32LD350 AUSDLJR


EBR66049702 32LD350 AUSDLJREBU60850010 32LD350 AUSDLUREBU61005102 32LD350 CUSWLH and CUSWLHO


32LD350 Main Component Layout (Front View)32LD350 Main Component Layout (Front View)

50

SW100Microprocessor

Reset

MAIN BOARDp/n: EBU60850003

IC1

IC401

USB1

18. IF p17. IF n16. IF AGC15. Reset14. 3.3V13. 1.26V12. GND11. CVBS10. NC 9. SIF

8. NC 7. SDA 6. SCL 5. NC 4. NC 3. 5V

2. NC 1. NC

Digital Video

Analog Video

Tuner B+

Tuner DataTuner Clock

Audio

IC100 MstarMicro and Video

Processor

P802

P402L406

IC1000

IC1450

Q100

X100

12MHz

EB

C

HDMI

Headphone

SIDE A

/V

32

12

IC5001TUNER

TDVJ-H001F

P2401

P600

R-R+L-L+

X1005

25MHzEB

C

EB

CC

A1A2

D1100

Q1105

Q1100

IC2IC105

L415

L423

IC405

IC403

L421

L422

IC406

IC600

L607 L606

C

A1 A2D7705

JK7700

JK1104 JK1102 JK1103 JK9800

IC1004

IC407

IC101

EB

C

EBC

EB

C

Q7702

Q1104

Q1103

Main Boards Used in the 32LD350:EBU60850009 32LD350 AUSWLJR and AUSDLFREBR66049702 32LD350 AUSDLJREBU60850010 32LD350 AUSDLUR

Main Boards Used in the 32LD350:EBU60850003 32LD350 CUSDLHEBU61005102 32LD350 CUSWLH and CUSWLHO

32LD350 Main (Front Side) Component VoltagesIC101 Serial Flash IC403 (+1.26V_VDDC) IC407 (D1.8V) IC5001 (+1.26V) for Tuner

Pin Memory Pin Regulator Pin Regulator Pin Regulator[1] 0.05V [1] 0.79V [1] 0.8V [1] 3.3V (In)[2] 3.28V [2] 0V (Gnd) [2] 0V (Gnd) [2] 1.26V (Out)[3] 2.26V [3] 3.37V (In) [3] 3.38V [3] 0V (Gnd)[4] 0V (Gnd) [4] 4.47V [4] 4.79V[5] 0V [5] 3.34V [5] 3.35V Q100 Write Protect for[6] 0V [6] 1.3V (Out) [6] 1.76V (Out) Pin IC101[7] 3.28V (B+) [7] 1.3V (Out) [7] 1.76V (Out) B 0V

[8] 3.28V (B+) [8] 2.96V (PWR On/Off2_1) [8] 2.36V (PWR On/Off1) C 3.3VE Gnd

IC105 HDCP IC405 (+3.3V_NORMAL) IC1000 (+1.2V_PVSB)Pin EEPROM Pin Regulator Pin Regulator Q1100 Earphone Mute[1] 0V (Gnd) [1] 0V (Gnd) [1] n/c Pin 1st Driver[2] 0V (Gnd) [2] 11.92V (In) [2] 3.26V (Enable) B 0V[3] 3.3V (B+) [3] 0V (Gnd) [3] 3.26V (In) C 2.26V[4] 0V (Gnd) [4] 0.8V [4] n/c E Gnd[5] 0V [5] 0.84V [5] n/c[6] 3.3V [6] 2.39V (PWR On/Off1) [6] 1.81V (Out) Q1103-4 EARPHONE[7] 0V (Gnd) [7] 3.35V (Out) [7] 1.21V Pin MUTE

[8] 3.28V (B+) [8] 3.35V (Out) [8] n/c B 0VC 0V

IC401 5V Regulator IC406 (+5V_NORMAL) IC1450 5V Shot Protection E Gndg ( _ )Pin for USB Pin Regulator Pin for USB[1] 11.9V (In) [1] 0V (Gnd) [1] 0V (Gnd) Q1105 Earphone Mute[2] 5.09V (Out) [2] 11.92V (In) [2] 5V (In) Pin 2nd Driver[3] 5.09V (Out) [3] 0V (Gnd) [3] 5V (In) B 0.63V[4] 0V (Gnd) [4] 0.8V [4] 0V (USB-Ctl) C 0V[5] 3.25V (PWR On/Off1) [5] 0.84V [5] E Gnd[6] 0.8V [6] 2.39V (PWR On/Off1) [6] 5V (Out)[7] 5.05V [7] 4.98V (Out) [7] 5V (Out)

[8] 0V (Gnd) [8] 4.98V (Out) [8] n/c

Q7702 HDMI 4 D1100 5V Routing D7705 5V RoutingPin Det Pin for IC1100 Pin for IC7701

B 0.63V [A1] 0.07V [A1] 0VC 0V [A2] 4.98V [A2] 4.98VE Gnd [C] 4.37V [C] 4.71V



32LD350 Main Component (Back Side) Layout32LD350 Main Component (Back Side) Layout

52

IC102

Q407

EB

C

EB

C

Q406

S G

DQ409

IC7702

CA1

A2

D7706

EB

C

EB

CQ1101Q1102

IC1100

EB

CQ5004 IC1201

IC1104

D1115

IC1105

C

A1 A2

E B

C

E B

CQ2405 Q2406

IC7701

EB

C

Q7701 Q7703

C A1

A2

D7703C

A1 A2

D102

EB

C Q600

12

3

2

IC601

In

Gnd

Out

Gnd IC400

IC104

3

2 1

IC103

EB

C12

3

Q401

Q402EB

CQ405

13

2 IC408

D S

G B

32LD350 Main (Back Side) Component Voltages

IC103 Reset IC1100 Earphone IC1201 RS232 IC7702 EDID Data Q1101-2 EARPHONEPin Generator Pin Amp Pin Data Buffer Pin HDMI4 Pin MUTE[1] Gnd [1] 2.14V [1] 3.34V [1] 0V (Gnd) B 0V[2] 0V [2] 0V (Gnd) [2] 3.48V [2] 0V (Gnd) C 0V[3] 3.39V [3] 0.02V [3] 0V [3] 0V (Gnd) E Gnd

[4] 2.19V [4] 0V [4] 0V (Gnd)IC104 EEPROM [5] 2.19V [5] (-5.37V) [5] 4.69V Q2405 IR Buffer

Pin Mstar [6] 4.37V [6] 5.39V [6] 4.69V Pin 1st Driver[1] 0V (Gnd) [7] 2.19V [7] (-5.37V) [7] 4.69V B 0.6V[2] 0V (Gnd) [8] 2.18V [8] n/c (0V) [8] 4.69V C 0V[3] 0V (Gnd) [9] n/c (3.39V) E Gnd[4] 0V (Gnd) IC1104 Optical Audio [10] n/c (3.35V) Q401 Power On/Off[5] 3.31V Pin Amp [11] n/c (0V) Pin Driver for Q402 Q2406 IR Buffer[6] 3.31V [1] 1.64V [12] 3.35V B 0.64V Pin 2nd Driver[7] 0V (Gnd) [2] 3.29V [13] 0V C 0V B 0V[8] 3.31V [3] 0V (Gnd) [14] 5.47V E Gnd C 3.3V

[4] 0V (Gnd) [15] 0V (Gnd) E GndIC400 (+3.3V_AVDD_MPLL) [5] 3.29V [16] 3.37V Q402 Power On/Off

Pin Regulator Pin Switch Q5004 Tuner SIF[In] 3.35V IC1105 EDID Data IC7701 EDID Data 1 3.39V (In) Pin (Sound) Buffer

[Gnd] Gnd Pin PC Pin HDMI2 2 0.89V (Ctl) B 0.163[Out] 3.34V [1] 0V (Gnd) [1] 0V (Gnd) 3 3.28V (Out) C Gnd

[2] 0V (Gnd) [2] 0V (Gnd) E 0.85VIC408 Power_Det [3] 0V (Gnd) [3] 0V (Gnd) Q405 Inverter On/Off

Pin 24V, 12V, 3.5V [4] 0V (Gnd) [4] 0V (Gnd) Pin Switch Q7701 HDMI 2[1] 3.52V [5] 4.7V [5] 4.7V B 0.06V Pin Det[2] 3 35V [6] 4 7V [6] 4 7V C 3 32V B 0 63V[2] 3.35V [6] 4.7V [6] 4.7V C 3.32V B 0.63V[3] Gnd [7] 4.7V [7] 4.7V E Gnd C 0V

[8] 4.7V [8] 4.7V E GndIC601 (+1.8V_Amp)

Pin Regulator Q407 PANEL_VCC Q409 PANEL_VCC Q600 AMP_MUTE Q7703 CEC Remote[1] Gnd Pin Control 2nd Driver Pin Switch Pin Pin 25 IC600 Pin HDMI CEC[2] 1.81V B 0.68V S 11.97V (In) B 0.08V [B] 3.39V[3] 3.31V C 0V G 1.84V (Enable) C 3.35V [G] 3.32V

E Gnd D 11.97V (Out) E Gnd [S] 0VQ406 PANEL_VCC [D] 3.26V

Pin Control 1st Driver D102 Mute D1115 5V RoutingB 0.05V Pin Routing Pin for IC7705 D7703 3.5V Blocking D7706 5V RoutingC 0.68V [A1] 0V [A1] 0.03V Pin for Q7703 Pin for IC7702E Gnd [A2] 0V [A2] 0V [A1] 0V [A1] 4.98V

[C] 0V [C] 4.69V [A2] 3.37V [A2] 0V[C] 3.3V [C] 4.69V


Main Board X100 and X1005 Crystal ChecksMain Board X100 and X1005 Crystal Checks

IC1004 VSB QAM DemodulatorIC100 Micro/Video Processor Crystal

12Mhz

X100

y

25MhzRuns all the time

X1005

Runs only when set12Mhz

3.61V p/p 2.91V p/p 3.64V p/p

the time

4.59V p/p

when set is on

X1005X100

MAIN Board


Main Board Connector P402 to Power Supply Voltage and Diode CheckMain Board Connector P402 to Power Supply Voltage and Diode Check

P402 “Main Board" to P201 “SMPS"P402

Di d

Odd Pins are Top Row


1 (1) PWR-ON 0V 3.28V 1.16V

2-4 24V 0V 24.19V 0.73V

5-8 Gnd Gnd Gnd Gnd

9-12 3.5V 3.41V 3.40V Open

13-15 Gnd Gnd Gnd Gnd

16 n/c n/c n/c Open

(1) PWR-On Pin 1: Turns on 12V, 24V to the Main and 24V to the Inverter P203 Pins 1~5.

(2) INV-On Pin 18: p

17 12V 0V 11.96V Open

18 (2) INV-ON 0V 3.32V Open

19 12V 0V 11.96V Open

20 (3) ERROR 0V 0 59V O

Turns on the Backlights

(3) Error_Out Pin 20: (Silk Screened A-DIM) Goes high (3.3V) when the backlights are told to come on. G b k l h th li ht 20 (3) ERROR 0V 0.59V Open

21 12V 0V 11.96V Open

22 (4) A-DIM 0.3V 4.49V Open

23 n/c n/c n/c Open

Goes back low when they light.If it goes high again on the 5th attempt to fire the backlights, the set shuts off.

(4) A-DIM Pin 22: (Silk Screened P-DIM) Is not used

24 (5) P-DIM 0V 0.65V~3.25V Open(Silk Screened P DIM) Is not used.

(5) P-DIM Pin 24 (Silk Screened Error_Out) can vary according to incoming video IRE level and OSD Backlight setting Output from the


Diode Mode values taken with all Connectors RemovedVideo Processor IC100. Range 0.65V to 3.25V.

P802 Main Board Panel Voltage ChecksP802 Main Board Panel Voltage Checks

To the Panel Interface Board

Location: Top Right of Board

P802P802

12V_LVDS Pins 27~30

N t Th P l h dditi l b d th t t t d t k thNote: The Panel has an additional board that sets on top and takes the 12V to generate the 5 usable voltages for the Panel.


P802 LVDS SignalsP802 LVDS Signals

The waveformsThe waveforms represent the 10 bit

Differential Pair LVDS Signal.

All waveforms shown are the (+) part of the

differential pair. The (-) part is exactly

the same only invertedinverted.

All waveforms are at the same 5uSec per/div rate and 100Mv per/div.


P802 Main Board to the Panel Voltage and Diode CheckP802 Main Board to the Panel Voltage and Diode CheckThere are no Stand-By Voltages for the ConnectorDiode Mode values taken with all Connectors RemovedP802 Connector “Main" to the “Panel Interface“

Pin Label Run Diode Check

1 Gnd Gnd Gnd

Pin Label Run Diode Check

16 TXA1- 0.79V Gnd

2 Gnd Gnd Gnd

3 N/C n/c n/c

4 N/C n/c n/c

5 Gnd Gnd Gnd

17 Gnd Gnd Gnd

18 TXA0+ 0.79V Gnd

19 TXA0- 0.79V 1.06V

20 Gnd Gnd Gnd5 Gnd Gnd Gnd

6 TXA3+ 1.14V 0.79V

7 TXA3- 1.34V 0.79V

8 Gnd Gnd Gnd

20 Gnd Gnd Gnd

21 N/C n/c n/c

22 LVDS_Sel 2.42 Open

23 Gnd Gnd Gnd

9 TXAC+ 1.25V 0.79V

10 TXAC- 1.2V 0.79V

11 Gnd Gnd Gnd

24 Gnd Gnd Gnd

25 Gnd Gnd Gnd

26 Gnd Gnd Gnd

12 TXA2+ 1.16V 0.79V

13 TXA2- 1.35V 0.79V

14 Gnd Gnd Gnd

15 TXA1+ 1 15V 0 79V

27 Panel_VCC 11.97V 2.59V



30 Panel VCC 11 97V 2 59V


15 TXA1+ 1.15V 0.79V 30 Panel_VCC 11.97V 2.59V

P2401 Main Board to Ft. IR J1 Voltage and Diode CheckP2401 Main Board to Ft. IR J1 Voltage and Diode Check

P2401 Connector "MAIN Board" To J1 "IR Board" P2401 1

Pin Label STBY Run Diode Check1 (1) SCL 0V 0V Open

2 (1) SDA 0V 0V Open

3 Gnd Gnd Gnd Gnd

4 KEY 1 3.4V 3.39V 1.52V

5 KEY 2 3.4V 3.39V 1.52V

6 3.5V_ST 3.41V 3.39V 0.9V

7 Gnd Gnd Gnd Gnd

8 LED_B 0V 0V 2.3V

9 (2) IR 2V 1 98V O9 (2) IR 2V 1.98V Open

10 Gnd Gnd Gnd Gnd

11 +3.3V_Normal 0.02V 3.3V 0.58V

12 LED R/BUZZ 2 49V 0V 2 14V12 LED_R/BUZZ 2.49V 0V 2.14V

(1) No Clock or Data pulses(2) IR pulses (1.6V p/p)



Main Board Connector P600 to Speakers Voltage and Diode CheckMain Board Connector P600 to Speakers Voltage and Diode CheckMute

Pin 25Q600 (Mute) on back side of the board just above IC600 is Active Low.

1.8V_Amp Pin 16

Use speaker out to test for defective Audio Amp IC600Note: (Normal, ½ Audio B+)

Normal 3.35V Collector to Pin 25

IC600Audio B+

24.17VPins 32-35

P600 CONNECTOR "Main" to "Speakers"Pin LABEL SBY Run Diode Check1 SPK-R(-) 0V 12 95V Open

( , ½ )Audio B+

24.17VPins 49-52

1 SPK R( ) 0V 12.95V Open

2 SPK-R(+) 0V 12.95V Open

3 SPK-L(-) 0V 12.95V Open

4 SPK-L(+) 0V 12.95V Open


(1)(1)

Circuit Location on the Main Board

P600


R- R+ L- L+

FRONT (IR and POWER LED) SECTIONFRONT (IR and POWER LED) SECTION

The IR board (located on the bottom left as viewed from the rear) contains the IR (Infrared) Remote Sensor and Power LEDs. This board also connects to the Key Board.

The IR board receives it operating B+ via J1 pin 6 (STBY 3.5V).

The IR (Infrared) remote receiver can be measured (2V) at pin 9 of connector J1 or P2401 on the Main board in Stand-By. During run pin 9 reads (1.98V).

The IR pulses (1.6V p/p) J1 pin 9 are sent to P2401 on the Main board and on to the MicroprocessorThe IR pulses (1.6V p/p) J1 pin 9 are sent to P2401 on the Main board and on to the Microprocessor (IC100) via pin C4.

The Front Power LEDs are controlled by pins 8 (Blue LED) and 12 (Red LED) of J1.

Th K b d i t d t th IR b d i J3 d t t J1 K 1 d K 2 liThe Key board is routed to the IR board via J3 and output on J1 Key 1 and Key 2 lines, (Key 1 pin 4 and Key 2 pin 5). Arriving at P2401 pins 4 and 5 on the Main Board. Then to the Microprocessor Pins A4 and B4.


Front IR Board (Connections Identified)Front IR Board (Connections Identified)p/n EBR64965302

Key Board

P3000

J1To Main Board

J2

IR board

J2


IR board

Front IR Board Remote Receiver CheckFront IR Board Remote Receiver Check

IR board

p/n EBR64965302

IR ReceiverDiode Check

R indicates Red LeadR indicates Red LeadB indicates Black Lead IR

Center Leg Ground

(2.8V) R Gnd R (2.34V)

(0.68V) B Gnd B (0.65V)

Power LEDs


Front Board Connectors J1 and J2 Voltage and Diode CheckFront Board Connectors J1 and J2 Voltage and Diode Check

J1 "Front IR" to P4201 " MAIN" J2 "Front IR" to “ Key Board"


1 (1) SCL 0V 0V Open

2 (1) SDA 0V 0V Open


1 KEY 1 3.4V 3.39V Open

2 Gnd Gnd Gnd Gndp

3 Gnd Gnd Gnd Gnd

4 KEY 1 3.4V 3.39V Open

5 KEY 2 3.4V 3.39V Open

2 Gnd Gnd Gnd Gnd

3 KEY 2 3.4V 3.39V Open

4 Gnd Gnd Gnd Gnd

6 3.5V_ST 3.41V 3.39V Open

7 Gnd Gnd Gnd Gnd

8 LED_B 0V 0V Open

9 (2) IR 2V 1.98V Open

10 Gnd Gnd Gnd Gnd

11 +3.3V_Normal 0.02V 3.3V Open

12 LED R/BUZZ 2 49V 0V O12 LED_R/BUZZ 2.49V 0V Open

(1) No Clock or Data pluses (2) IR pulses (1.6V p/p)



KEY BOARD SECTIONKEY BOARD SECTION

The Key board is routed to the IR board from P3000 to J3 and output on J1 Key 1 and Key 2 lines.

Key Boardp/n: EBR65863602

The Key board is routed to the IR board from P3000 to J3 and output on J1 Key 1 and Key 2 lines.Arriving at P2401 pins 4 and 5 on the Main Board. Then to the Microprocessor Pins A4 and B4.

On P3000 (Key 1 is pin 1 and Key 2 is pin 3), Pins 2 and 4 are ground. Key 1 / 2 Voltage and Resistance Chart with buttons pressed.

Label Function Resistance VoltageKey 1 Vol + 17M 1.70V

Voltage and Resistance taken with AC applied to the set.

N B tt d R i tey o 0Vol - 10M 1.09VMenu 5.27M 0.52VEnter 0.98M 0.10V

No Button pressed Resistance is Open and Voltage is 3.4V.

Diode Check on Key 1 and Key 2 is Open.

Label Function Resistance VoltageKey 2 CH + 17M 1.70V

pVoltage with no key pressed 3.4V STBY and 3.39V RUN

CH - 10M 1.09VPower 5.27M 0.52VInput 0.98M 0.10V


INVISIBLE SPEAKER SECTIONINVISIBLE SPEAKER SECTION

Speaker/ EAB60961401

The 32LD350 contains the Invisible Speaker system. The Full Range Speakers point downward, so there is no front viewable speaker grill or air ports.

p/n EAB60961401

It uses the dual split magnet style of thin profile speaker.

Installed


INTERCONNECT DIAGRAM (11 X 17 FOLDOUT SECTION)INTERCONNECT DIAGRAM (11 X 17 FOLDOUT SECTION)

This section shows the 11X17 foldout that’s available in the Paper This section shows the 11X17 foldout that’s available in the Paper and Adobe version of the Training Manual.and Adobe version of the Training Manual.gg

The Adobe version of this Training Manual allows the viewer to The Adobe version of this Training Manual allows the viewer to ggzoom in and out making reading of the small text easier.zoom in and out making reading of the small text easier.This Power Point shows a graphical representation of the 11 X 17 This Power Point shows a graphical representation of the 11 X 17 foldout page so clarity is limitedfoldout page so clarity is limitedfoldout page so clarity is limited.foldout page so clarity is limited.


J2

32LD350 INTERCONNECT DIAGRAM

F10124V 7A

J1

TO TFT MODULE PANEL BOARD

LVDS

CN1

J2

J1

Front IR

Side (Key) C

ontrols

IR ReceiverPower Button

P3000

P402 to SMPS P201Pin Diode Check1

2-4 Open5-8

9-1213-16

1718 1.5V19 2.58V20212223

2.75V

2.58V

Open2.58V

24

0.91V

3.04V

Gnd

Gnd

Gnd

Open

For VoltagesSee P201 SMPS

To all SpeakersAll pins 12.95V

Pin Label STBY Run Diode1 SCL 0V2

Gnd30V

45 Key 26

Gnd7LED_B8

IR910

OpenOpen

1.52V

Gnd

Open

GndSDA

Gnd

3.4V

P2401 ‘Main” to J1 "IR Board"

Gnd

2V

0V0V

Gnd

3.39V

Gnd

1.98V0V 0V 2.3V

Key 1 3.4V 3.39V 1.52V

ST_3.3V 3.41V 3.39V 0.9V

Gnd Gnd Gnd Gnd+3.3V11

120.58V0.2V 3.3V

LED_R 2.49V 0V 2.14V

450V68uF

+ -

450V68uF

+ -F5013.15A / 250VF100

5A / 250V

SK100

D101

Q601

D602

Q101

D252

D251

D201

D255

P201

P203

L600

LF102

T101T501

Q102

N

L

SMPSP/N: EAY60868901

D501 IC500D502

D503

D801

C608 C607

IC101

0V STBY388V RUN

(1) PWR-On Pin 1: Turns on 12V, 24V to the Main and 24V to the Inverter P203 Pins 1~5.

(2) INV-On Pin 18: Turns on the Backlights

(3) Error_Out Pin 20: (Silk Screened A-DIM) Goes high (3.3V) when the backlights are told to come on. Goes back low when they light.If it goes high again on the 5th attempt to fire the backlights, the set shuts off.

(4) A-DIM Pin 22: (Silk Screened P-DIM) Is not used .

(5) P-DIM Pin 24 (Silk Screened Error_Out) can vary according to incoming video IRE level and OSD Backlight setting Output from the Video Processor IC100. Range 0.65V to 3.25V.

P201 “SMPS” to P402 "Main PWB"Pin Label STBY Run Diode1 0V

2-4 0.73V5-8

9-1213-16

17Gnd

11.96V

18

3.5V

3.32V Open19

N/C

Open

20

11.96V

21 0V 11.96V

22 0.3V 4.49V

23

3.28V 1.16V

OpenOpenOpen

24

(1) PWR_ON

0V 2.46V

24VGnd

12V

(2) INV_ON12V

(3) Error_Out12V

(4) A-DIM

(5) P-Dim

24.19V0V

0V

0V0V

3.41V 3.4V Open0V 0.59V Open

n/c n/c Open

Gnd Gnd Gnd

Gnd Gnd Gnd

Open

Pin Label STBY Run DiodeTo Back Light

To Back Light

To Back Light

To Back Light

To Back Light

To Back Light

To Back Light

To Back Light

P203 "SMPS" to CN1 "Inverter PWB"Pin Label STBY Run Diode

1,2,3,4,5 24V 0V 24.19V Open6,7,8,9,10 Gnd Gnd Gnd

11 (3) Error_Out 0.59V Open12 3.31V13 (4) A-DIM 4.5V14 (5) P-Dim 2.46V

0V0V0V

0V

OpenOpenOpen

INV_ON

Gnd

CN1DiodeCheckAll pinsOpen

Except Gnd

There is a 12V Fuse on the Panel Board.

Grayed out components are on the Back Side.

Main Boards Used in the 32LD350:EBU60850009 32LD350 AUSWLJR and AUSDLFREBR66049702 32LD350 AUSDLJREBU60850010 32LD350 AUSDLUREBU60850003 32LD350 CUSDLHEBU61005102 32LD350 CUSWLH and CUSWLHO

SMPS Used in the 32LD350:EAY60868901 32LD350 AUSWLJR or AUSDLFR or AUSDLUR or AUSDLJR


Ballast

TFT Interface Board

12V Pins 27 ~ 30 and LVDS Video Signals

12V Pins 2 ~ 5 and LVDS Video Signals

1 and 30 are Gnd.

F101DiodeCheck

Red lead OpenBlk lead 0.9V

12

32

12

32

12

32

12

32

12

32

12

32

12

32

12

32

Q110

Q106

Q103

Q109

Q104

Q108

Q107

Q101

12

32

U1

L101

1 2

4 3

13

4

13

4

13

4

13

4

13

4

13

4

13

4

13

4

T103

T104

T105

T106

T107

T108

T109

T110

U201 U2

U3

123

2

Q110Q106 Pin

1)2)3)

Gnd9.03V4.58V

VOLTAGES

Q103Q109 Pin

1)2)3)

24.16V9.03V

0V

123

2

123

2

Q104Q108 Pin

1)2)3)

Gnd9.03V4.58V

Q107Q101 Pin

1)2)3)

24.16V9.03V

0V

123

2

U1 Pin1)2)3)

0VGnd

24.07V

123

2

Put the 3 screws in on the right

side for service position.

SW100Microprocessor

Reset

MAIN BOARDp/n: EBU60850003

IC1

IC401

USB1

18. IF p17. IF n16. IF AGC15. Reset14. 3.3V13. 1.26V12. GND11. CVBS10. NC 9. SIF

8. NC 7. SDA 6. SCL 5. NC 4. NC 3. 5V

2. NC 1. NC

Digital Video

Analog Video

Tuner B+

Tuner DataTuner Clock

Audio

IC100 MstarMicro and Video

Processor

P802P402

L406IC1000

IC1450

Q100

X100

12MHz

HDMI

Headphone

SIDE A/V

32

12

IC5001

TUNER TDVJ-H001F

P2401

P600

R-R+L-L+

X1005

25MHzEB

C

EB

CC

A1A2

D1100

Q1105

Q1100

IC2

IC105

L415

L423

IC405

IC403

L421

L422

IC406

IC600

L607 L606

C

A1 A2D7705

JK7700

JK1104JK1102 JK1103

JK9800

IC1004

IC407

IC101

EB

C

EB

C

E

BCQ7702

Q1104

Q1103

E

BC

IC102

Q407

EBC

E

BC

Q406SG

DQ409

IC7702

C A1

A2D7706

EB

C

EB C

Q1101

Q1102

IC1100

E B

C

Q5004IC1201

IC1104

D1115

IC1105C

A1A2

EB

C

EB

C

Q2405Q2406

IC7701

E

BC

Q7701

Q7703CA1

A2

D7703

C

A1A2

D102

E

BCQ600

12

3

2

IC601

In

Gnd

Out

Gnd

IC400 IC104

3

21

IC103

E B

C1 2

3

Q401Q402

E B

CQ405

21

3IC408

+3.3V_TUFrom 3.3V_Normal

+1.26V_VDDC

S

B G

D

From 3.3V_ST

HDCP EEPROM

+1.8V_DDR

From 3.3V_ST

From 3.3V_STPower On Switch

Power On Switch Ctl

Reset Gen

DDR

MStar EEPROM3.3V_Normal In

+3.3V_AVDD_MPLL3.3V_ST In

12V In

+1.8V_AMP

+3.3V_Normal

12V In

+5V_Normal

Power_Det

INV_CTL Driver

3.3V_Normal In

MuteRouting

CECSwitch

EDID HDMI 2

HDMI Hot Swap

Audio Mute

3.3V_Normal Pin 81.8V_Amp Pin 16

24V Amp_VCC Pins 32~3524V Amp_VCC Pins 49~52

Audio Amp

R-R+ L-L+

PC EDID

Optical Audio Amp

+5V_TUFrom 5V_Normal

+1.26VFor Tuner

3.3V_TU In

Earphone Mute

EarphoneAmp

DigitalVideo

SerialFlash

WPNANDFlash

USB +5VOvercurrent

5V_USB In

EDID HDMI 4

+1.2V_PVSB

3.3V_TU In

5V_USB

12V In

Panel Vcc 1st Driver

Panel Vcc 2nd

Driver

Panel Vcc Switch

DDR

Earphone Amp Mute

Pin 1 of T103 ~ T110

Warning: Over 1.2KvTo each Backlight.

Pin 3 of T103 ~ T110

2Msec per/div2.6V p/p 120Hz

50% P-DIM

2Msec per/div44V p/p 120Hz

50% P-DIM

Pin 4 of T103 ~ T110

SMPS TEST: To Force Power Supply On.

Disconnect P402 on Main Board.Jump pin 1 (PWR_ON) to pin 9, 10, 11 or 12 . This should force the SMPS to the on state. All Voltages should be produced. (24V and 12V to Main. 24V to Inverter).The Backlights should come on.

Note: STBY 3.5V Must be present when AC applied.

Jumper

P201

Pin 1 Key 1 Pin 3 Key 2

Diode Check OpenPins 2 and 4 Gnd

Key 1 / 2 Voltage and Resistance Chart with buttons pressed.

Resistance17M10M

5.27M0.98M

FunctionVol +Vol -MenuEnter

Voltage1.70V1.09V0.52V0.10V

Key 1

Resistance17M10M

5.27M0.98M

FunctionCH +CH -

PowerInput

Voltage1.70V1.09V0.52V0.10V

Key 2

Voltage and Resistance taken with AC applied to the set.

No Button pressed Resistance is Open and Voltage is 3.4V

Diode

Gnd

OpenOpen

Open

Gnd

2.77VOpen

Open

2.97V

GndOpenOpen

J1 Ft IRHot Gnd (Shock Hazard)

Hot

Cold

32LD350 MAIN (FRONT SIDE) SIMICONDUCTORS

IC101 Serial Flash IC403 (+1.26V_VDDC) IC407 (D1.8V) IC5001 (+1.26V) for Tuner Q7702 HDMI 4Pin Memory Pin Regulator Pin Regulator Pin Regulator Pin Det[1] 0.05V [1] 0.79V [1] 0.8V [1] 3.3V (In) B 0.63V[2] 3.28V [2] 0V (Gnd) [2] 0V (Gnd) [2] 1.26V (Out) C 0V[3] 2.26V [3] 3.37V (In) [3] 3.38V [3] 0V (Gnd) E Gnd[4] 0V (Gnd) [4] 4.47V [4] 4.79V[5] 0V [5] 3.34V [5] 3.35V Q100 Write Protect for D1100 5V Routing[6] 0V [6] 1.3V (Out) [6] 1.76V (Out) Pin IC101 Pin for IC1100[7] 3.28V (B+) [7] 1.3V (Out) [7] 1.76V (Out) B 0V [A1] 0.07V [8] 3.28V (B+) [8] 2.96V (PWR On/Off2_1) [8] 2.36V (PWR On/Off1) C 3.3V [A2] 4.98V

E Gnd [C] 4.37VIC105 HDCP IC405 (+3.3V_NORMAL) IC1000 (+1.2V_PVSB)

Pin EEPROM Pin Regulator Pin Regulator Q1100 Earphone Mute D7705 5V Routing[1] 0V (Gnd) [1] 0V (Gnd) [1] n/c Pin 1st Driver Pin for IC7701[2] 0V (Gnd) [2] 11.92V (In) [2] 3.26V (Enable) B 0V [A1] 0V[3] 3.3V (B+) [3] 0V (Gnd) [3] 3.26V (In) C 2.26V [A2] 4.98V[4] 0V (Gnd) [4] 0.8V [4] n/c E Gnd [C] 4.71V[5] 0V [5] 0.84V [5] n/c[6] 3.3V [6] 2.39V (PWR On/Off1) [6] 1.81V (Out) Q1103-4 EARPHONE[7] 0V (Gnd) [7] 3.35V (Out) [7] 1.21V Pin MUTE [8] 3.28V (B+) [8] 3.35V (Out) [8] n/c B 0V

C 0VIC401 5V Regulator IC406 (+5V_NORMAL) IC1450 5V Shot Protection E Gnd

Pin for USB Pin Regulator Pin for USB[1] 11.9V (In) [1] 0V (Gnd) [1] 0V (Gnd) Q1105 Earphone Mute[2] 5.09V (Out) [2] 11.92V (In) [2] 5V (In) Pin 2nd Driver[3] 5.09V (Out) [3] 0V (Gnd) [3] 5V (In) B 0.63V[4] 0V (Gnd) [4] 0.8V [4] 0V (USB-Ctl) C 0V[5] 3.25V (PWR On/Off1) [5] 0.84V [5] E Gnd[6] 0.8V [6] 2.39V (PWR On/Off1) [6] 5V (Out)[7] 5.05V [7] 4.98V (Out) [7] 5V (Out) [8] 0V (Gnd) [8] 4.98V (Out) [8] n/c

32LD350 MAIN (BACK SIDE) SIMICONDUCTORS

IC103 Reset IC1100 Earphone IC1201 RS232 IC7702 EDID Data Q407 PANEL_VCC Q5004 Tuner SIFPin Generator Pin Amp Pin Data Buffer Pin HDMI4 Pin Control 2nd Driver Pin (Sound) Buffer[1] Gnd [1] 2.14V [1] 3.34V [1] 0V (Gnd) B 0.679V B 0.163[2] 0V [2] 0V (Gnd) [2] 3.48V [2] 0V (Gnd) C 0V C Gnd[3] 3.39V [3] 0.02V [3] 0V [3] 0V (Gnd) E Gnd E 0.85V

[4] 2.19V [4] 0V [4] 0V (Gnd)IC104 EEPROM [5] 2.19V [5] (-5.37V) [5] 4.69V Q409 PANEL_VCC Q7701 HDMI 2

Pin Mstar [6] 4.37V [6] 5.39V [6] 4.69V Pin Switch Pin Det[1] 0V (Gnd) [7] 2.19V [7] (-5.37V) [7] 4.69V S 11.97V (In) B 0.63V[2] 0V (Gnd) [8] 2.18V [8] n/c (0V) [8] 4.69V G 1.84V (Enable) C 0V[3] 0V (Gnd) [9] n/c (3.39V) D 11.97V (Out) E Gnd[4] 0V (Gnd) IC1104 Optical Audio [10] n/c (3.35V) Q401 Power On/Off[5] 3.31V Pin Amp [11] n/c (0V) Pin Driver for Q402 Q600 AMP_MUTE Q7703 CEC Remote[6] 3.31V [1] 1.64V [12] 3.35V B 0.64V Pin Pin 25 IC600 Pin HDMI CEC[7] 0V (Gnd) [2] 3.29V [13] 0V C 0V B 0.08V [B] 3.39V[8] 3.31V [3] 0V (Gnd) [14] 5.47V E Gnd C 3.35V [G] 3.32V

[4] 0V (Gnd) [15] 0V (Gnd) E Gnd [S] 0VIC400 (+3.3V_AVDD_MPLL) [5] 3.29V [16] 3.37V Q402 Power On/Off [D] 3.26V

Pin Regulator Pin Switch Q1101-2 EARPHONE[In] 3.35V IC1105 EDID Data IC7701 EDID Data 1 3.39V (In) Pin MUTE D102 Mute

[Gnd] Gnd Pin PC Pin HDMI2 2 0.89V (Ctl) B 0V Pin Routing[Out] 3.34V [1] 0V (Gnd) [1] 0V (Gnd) 3 3.28V (Out) C 0V [A1] 0V

[2] 0V (Gnd) [2] 0V (Gnd) E Gnd [A2] 0VIC601 (+1.8V_Amp) [3] 0V (Gnd) [3] 0V (Gnd) Q405 Inverter On/Off [C] 0V

Pin Regulator [4] 0V (Gnd) [4] 0V (Gnd) Pin Switch Q2405 IR Buffer[1] Gnd [5] 4.7V [5] 4.7V B 0.06V Pin 1st Driver D1115 5V Routing[2] 1.81V [6] 4.7V [6] 4.7V C 3.32V B 0.6V Pin for IC7705[3] 3.31V [7] 4.7V [7] 4.7V E Gnd C 0V [A1] 0.03V

[8] 4.7V [8] 4.7V E Gnd [A2] 0VIC408 Power_Det Q406 PANEL_VCC [C] 4.69V

Pin 24V, 12V, 3.5V D7703 3.5V Blocking D7706 5V Routing Pin Control 1st Driver Q2406 IR Buffer[1] 3.52V Pin for Q7703 Pin for IC7702 B 0.03V Pin 2nd Driver[2] 3.35V [A1] 0V [A1] 4.98V C 0.69V B 0V[3] Gnd [A2] 3.37V [A2] 0V E Gnd C 3.3V

[C] 3.3V [C] 4.69V E Gnd

32LD350 LVDS P802 WAVEFORMS

32LD350 P802 LVDS CABLE WAVEFORMS:Waveforms taken using SMTP Color Bar input.All readings give the Scale 100mV and 5uSec per division Time Base related to scope settings.

Pin 6

5uSec per/div 625mV p/p

Pin 7


Pin 9

5uSec per/div 548.5mV p/p

Pin 10


Pin 12


Pin 13


Pin 15


Pin 16


Pin 18


Pin 19


Clock (TXAC+) Clock (TXAC-)

32LD350 Conclusion

Page

This concludes the 32LD350 training

session.

Direct View LCDDirect View LCD

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LG 32LD350 Training Presentation February 23rd 2011

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