SHARP LC32HT3U, LC-37HT3U, LC-42HT3U Service Manual

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LC-32HT3U/LC-37HT3U/LC-42HT3U

SERVICE MANUAL

No. S97P6LC32HT3U

LCD COLOR TELEVISION

LC-32HT3U LC-37HT3U

MODELS

LC-42HT3U

In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its orig-

In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified should be used.

inal condition and only parts identical to those specified should be used.

LC-42HT3U

OUTLINE

This Service Manual covers the differences from LC-32/37D42U. For other technical information, refer to the LC32/37D42U (No. S06X9LC32D42U) Service Manual.

CONTENTS

DIFFERENCES FROM BASE MODEL

LIST OF CHANGED PARTS...............................i

SAFETY PRECUTION

IMPORTANT SERVICE SAFETY PRE-

CAUTION ...........................................................ii

PRECAUTIONS A PRENDRE LORS DE

LA REPARATION..............................................iii

PRECAUTIONS FOR USING LEAD-FREE

SOLDER ...........................................................iv

CHAPTER 1. OPERATION MANUAL

[1] SPECIFICATIONS ......................................... 1-1

[2] OPERATION MANUAL .................................. 1-2

[3] DIMENSIONS .............................................. 1-18

CHAPTER 2. REMOVING OF MAJOR PARTS

[1] REMOVING OF MAJOR PARTS

(LC-32HT3U/LC-37HT3U) ............................. 2-1

[2] REMOVING OF MAJOR PARTS

(LC-42HT3U).................................................. 2-7

CHAPTER 3. ADJUSTMENT

[1] ADJUSTMENT PROCEDURE ....................... 3-1

CHAPTER 4. TROUBLE SHOOTING TABLE

[1] TROUBLE SHOOTING TABLE .....................4-1

CHAPTER 5. OVERALL WIRING DIAGRAM/BLOCK DIAGRAM

[1] OVERALL WIRING DIAGRAM

(LC-32HT3U) .................................................5-1

[2] OVERALL WIRING DIAGRAM

(LC-37HT3U) .................................................5-2

[3] OVERALL WIRING DIAGRAM

(LC-42HT3U) .................................................5-3

[4] SYSTEM BLOCK DIAGRAM.........................5-4

CHAPTER 6. PRINTED WIRING BOARD

[1] MAIN UNIT PRINTED WIRING BOARD........6-1

[2] DIGITAL MINI UNIT PRINTED WIRING

BOARD..........................................................6-5

CHAPTER 7. SCHEMATIC DIAGRAM

[1] DESCRIPTION OF SCHEMATIC DIA-

GRAM............................................................7-1

[2] SCHEMATIC DIAGRAM................................7-2

Parts Guide

Parts marked with " " are important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintaining the safety and performance of the set.

This document has been published to be used for after sales service only. The contents are subject to change without notice.

LC-32HT3U/LC-37HT3U/LC-42HT3U

LC32HT3U

DIFFERENCES FROM BASE MODEL

Service Manual

LIST OF CHANGED PARTS

Ref No. Description LC-32D42U/LC-37D42U LC-32HT3U/LC-37HT3U/LC-42HT3U Note

Printed Wiring Board Assemblies

MAIN Unit DUNTKD862FM04 DUNTKE285FM01 Change R/C, LED Unit DUNTKD909FM02 DUNTKD909FM02 No Changes KEY Unit DUNTKD910FM02 DUNTKD910FM02 No Changes AV-Terminal Unit DUNTKD999FM04 DUNTKD999FM04 No Changes POWER Unit RDENCA198WJQZ RDENCA198WJQZ No Changes DIGITAL MINI PWB Unit — DUNTKD537FM03 Addition

Refer to PARTS GUIDE for CABINET PARTS, SUPPLIED ACCESSORIES, PACKEING PARTS and SERVICE JIGS.

LC-32HT3U/LC-37HT3U/LC-42HT3U

LC32HT3U

SAFETY PRECAUTION

Service Manual

IMPORTANT SERVICE SAFETY PRECAUTION

Service work should be performed only by qualified service technicians who are thoroughly familiar with all safety checks and the servicing guidelines which follow:

WARNING

1. For continued safety, no modification of any circuit should be attempted.

2. Disconnect AC power before servicing.

CAUTION: FOR CONTINUED PROTECTION AGAINST A RISK OF FIRE REPLACE ONLY WITH SAME TYPE FUSE.

F701 (125V 8A), F4701, F5701 (250V 3A ~ 115

• Use an AC voltmeter having with 5000 ohm per volt, or higher, sensitivity or measure the AC voltage drop across the resistor.

• Connect the resistor connection to all exposed metal parts having a return to the chassis (antenna, metal cabinet, screw heads, knobs and control shafts, escutcheon, etc.) and measure the AC voltage drop across the resistor.

All checks must be repeated with the AC cord plug connection reversed. (If necessary, a nonpolarized adaptor plug must be used only for the purpose of completing these checks.)

Any reading of 0.75 Vrms (this corresponds to 0.5 mA rms AC.) or more is excessive and indicates a potential shock hazard which must be corrected before returning the monitor to the owner.

DVM

BEFORE

RETURNING THE RECEIVER (Fire &

Shock Hazard)

Before returning the receiver to the user, perform the following safety checks:

3. Inspect all lead dress to make certain that leads are not pinched, and check that hardware is not lodged between the chassis and other metal parts in the receiver.

4. Inspect all protective devices such as non-metallic control knobs, insulation materials, cabinet backs, adjustment and compartment covers or shields, isolation resistor-capacitor networks, mechanical insulators, etc.

5. To be sure that no shock hazard exists, check for leakage current in the following manner.

• P lug the AC cord directly into a 120 volt AC outlet.

• Using two clip leads, connect a 1.5k ohm, 10 watt resistor paralleled by a parts and a known earth ground, such as electrical conduit or electrical ground connected to an earth ground.

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

0.15µF capacitor in series with all exposed metal cabinet

TO EXPOSED METAL PARTS

AC SCALE

1.5k ohm 10W

0.15µF

TEST PROBE

CONNECT TO KNOWN EARTH GROUND

SAFETY NOTICE

Many electrical and mechanical parts in LCD color television have special safety-related characteristics.

These characteristics are often not evident from visual inspection, nor can protection afforded by them be necessarily increased by using replacement components rated for higher voltage, wattage, etc.

Replacement parts which have these special safety characteristics are identified in this manual; electrical components having such features

are identified by " " and shaded areas in the Replacement Parts List and Schematic Diagrams.

For continued protection, replacement parts must be identical to those used in the original circuit.

The use of a substitute replacement parts which do not have the same safety characteristics as the factory recommended replacement parts shown in this service manual, may create shock, fire or other hazards.

LC-32HT3U/LC-37HT3U/LC-42HT3U

PRECAUTIONS A PRENDRE LORS DE LA REPARATION

Ne peut effectuer la réparation qu' un technicien spécialisé qui s'est parfaitement accoutumé à toute vérification de sécurité et aux conseils suivants.

A l'aide de deux fils à pinces, brancher une résistance de 1.5 k

AVERTISSEMENT

N'entreprendre aucune modification de tout circuit. C'est dangereux.

Débrancher le récepteur avant toute réparation.

PRECAUTION:POURLAPROTECTION CONTINUE CONTRE LES RISQUES D'INCENDIE, REMPLACER LE FUSIBLE

F701 (125V 8A), F4701, F5701 (250V 3A ~ 115

VERIFICATIONS CONTRE L'INCEN-DIE ET LE CHOC ELECTRIQUE

Avant de rendre le récepteur à l'utilisateur, effectuer les vérifications suivantes.

Inspecter tous les faisceaux de câbles pour s'assurer que les fils ne soient pas pincés ou qu'un outil ne soit pas placé entre le châssis et les autres pièces métalliques du récepteur.

Inspecter tous les dispositifs de protection comme les boutons de commande non-métalliques, les isolants, le dos du coffret, les couvercles ou blindages de réglage et de compartiment, les réseaux de résistancecapacité, les isolateurs mécaniques, etc.

S'assurer qu'il n'y ait pas de danger d'électrocution en vérifiant la

5. fuite de courant, de la facon suivante:

Brancher le cordon d'alimentation directem-ent à une prise de cou-

•

rant de 120V. (Ne pas utiliser de transformateur d'isolation pour cet essai).

•

10 watts en parallèle avec un condensateur de avec toutes les pièces métalliques exposées du coffret et une terre connue comme une conduite électrique ou une prise de terre branchée à la terre.

Utiliser un voltmètre CA d'une sensibilité d'au moins 5000 /V pour

•

mesurer la chute de tension en travers de la résistance.

Toucher avec la sonde d'essai les pièces métalliques exposées qui

•

présentent une voie de retour au châssis (antenne, coffret métallique, tête des vis, arbres de commande et des boutons, écusson, etc.) et mesurer la chute de tension CA en-travers de la résistance. Toutes les vérifications doivent être refaites après avoir inversé la fiche du cordon d'alimentation. (Si nécessaire, une prise d'adpatation non polarisée peut être utilisée dans le but de terminer ces vérifications.) La tension de pointe mesurèe ne doit pas dépasser 0.75V (correspondante au courant CA de pointe de 0.5mA). Dans le cas contraire, il y a une possibilité de choc électrique qui doit être supprimée avant de rendre le récepteur au client.

0.15µF en série

DVM

ECHELLE CA

1.5k ohm 10W

0.15

SONDE D'ESSAI

AUX PIECES METALLIQUES EXPOSEES

BRANCHER A UNE TERRE CONNUE

AVIS POUR LA SECURITE

De nombreuses pièces, électriques et mécaniques, dans les téléviseur ACL présentent des caractéristiques spéciales relatives à la sécurité, qui ne sont souvent pas évidentes à vue. Le degré de protection ne peut pas être nécessairement augmentée en utilisant des pièces de remplacement étalonnées pour haute tension, puissance, etc. Les pièces de remplacement qui présentent ces caractéristiques sont identifiées dans ce manuel; les pièces électriques qui présentent ces particularités sont identifiées par la marque " " et hachurées dans la liste des pièces de remplacement et les diagrammes schématiques.

Pour assurer la protection, ces pièces doivent être identiques à celles utilisées dans le circuit d'origine. L'utilisation de pièces qui n'ont pas les mêmes caractéristiques que les pièces recommandées par l'usine, indiquées dans ce manuel, peut provoquer des électrocutions, incendies, radiations X ou autres accidents.

iii

LC-32HT3U/LC-37HT3U/LC-42HT3U

PRECAUTIONS FOR USING LEAD-FREE SOLDER

Employing lead-free solder

• “PWBs” of this model employs lead-free solder. The LF symbol indicates lead-free solder, and is attached on the PWBs and service manuals. The alphabetical character following LF shows the type of lead-free solder.

Example:

Indicates lead-free solder of tin, silver and copper. Indicates lead-free solder of tin, silver and copper.

Using lead-free wire solder

• When fixing the PWB soldered with the lead-free solder, apply lead-free wire solder. Repairing with conventional lead wire solder may cause damage or accident due to cracks.

As the melting point of lead-free solder (Sn-Ag-Cu) is higher than the lead wire solder by 40 °C, we recommend you to use a dedicated soldering bit, if you are not familiar with how to obtain lead-free wire solder or soldering bit, contact our service station or service branch in your area.

Soldering

• As the melting point of lead-free solder (Sn-Ag-Cu) is about 220 °C which is higher than the conventional lead solder by 40 °C, and as it has poor solder wettability, you may be apt to keep the soldering bit in contact with the PWB for extended period of time. However, Since the land may be peeled off or the maximum heat-resistance temperature of parts may be exceeded, remove the bit from the PWB as soon as you confirm the steady soldering condition.

Lead-free solder contains more tin, and the end of the soldering bit may be easily corroded. Make sure to turn on and off the power of the bit as required.

If a different type of solder stays on the tip of the soldering bit, it is alloyed with lead-free solder. Clean the bit after every use of it. When the tip of the soldering bit is blackened during use, file it with steel wool or fine sandpaper.

• Be careful when replacing parts with polarity indication on the PWB silk.

Lead-free wire solder for servicing

PARTS CODE

ZHNDAi123250E BL J φ0.3mm 250g (1roll) ZHNDAi126500E BK J φ0.6mm 500g (1roll) ZHNDAi12801KE BM J φ1.0mm 1kg (1roll)

PRICE

RANK

PART

DELIVERY

DESCRIPTION

LC-32HT3U/LC-37HT3U/LC-42HT3U

LC32HT3U

CHAPTER 1. OPERATION MANUAL

[1] SPECIFICATIONS

Service Manual

LCD panel

Number of dots

TV Function

TV-standard (CCIR)

Receiving Channel

Audio multiplex

Audio out

Terminals

Rear

Item

VHF/UHF

CATV

Digital Terrestrial Broadcast (8VSB)

Digital cable*1 (64/256 QAM)

INPUT 1

INPUT 2

INPUT 3

INPUT 4

INPUT 5

INPUT 6

ANTENNA

DIGITAL AUDIO OUTPUT

OUTPUT

Model: LC-32HT3U

Advanced Super View

32 & BLACK TFT LCD (Screen size 31

measured diagonally)

3,147,264 dots (1366

Model: LC-37HT3U

Advanced Super View

37 &BLACKTFTLCD (Screen size 37 measured diagonally)

768 3 dots)

42 & BLACK TFT LCD (Screen size 42 measured diagonally)

American TV Standard ATSC/NTSC System

VHF 2-13ch, UHF 14-69ch

1-135ch (non-scrambled channel only)

2-69ch

1-135ch (non-scrambled channel only)

BTSC System

10W

AV in, COMPONENT in

AV in , S-VIDEO in

Audio in, COMPONENT in

AV in , COMPONENT in

AV in , S-VIDEO in

HDMI in with HDCP

Audio in, HDMI in with HDCP

15 pin mini D-sub female connector, Audio in (Ø 3.5 mm jack)

Unbalance, F Type 1 (VHF/UHF/CATV/ATSC/QAM)

Optical Digital audio output 1 (PCM/Dolby Digital)

Audio out

Model: LC-42HT3U

Advanced Super View

TRANSPORT RJ-11

OSD language

Power Requirement

Power Consumption

TV only

Weight

Dimension*2 (W

H D)

TV only

Operating temperature

stand

English/French/Spanish

AC 120 V, 60 Hz

152 W

35.3 lbs.16.0 kg

40.8 lbs./18.5 kg

3111/322059/64353/64inch

3111/322313/64937/64inch

32°F to 104°F (0°C to 40°C)

*1Emergency alert messages via Cable are unreceivable. *2 The dimensional drawings are shown on the inside back cover.

•

There may be some deviations from these values in individual units.

Optional accessory

The listed optional accessory is available for the Liquid Crystal Television. Please purchase it at your nearest shop.

• Additional optional accessories may be available in the near future. When purchasing, please read the newest catalogue for compatibility and check the availability.

185 W

43.0 lbs./19.5 kg

50.7 lbs./23.0 kg

/642337/64353/64inch

3561/642527/321135/64inch

Part name

Wall mount bracket

235 W

59.5 lbs./27.0 kg

67.2 lbs./30.5 kg

/322637/6459/32inch

4019/32287/8111/2inch

Model number

AN-37AG2/ AN-52AG1 (LC-42HT3U only)

1 – 1

[2] OPERATION MANUAL

Part names

TV (Top/Front)

LC-32HT3U/LC-37HT3U/LC-42HT3U

Channel buttons(CH / )

Volume buttons (VOL

/ ) INPUT button

POWER button

Remote control sensor

OPC sensor*

POWER indicator**

NOTE

* OPC: Optical Picture Control (See OPERATION MANUAL FOR HOTEL OPERATOR.) ** See page for TV status indicator Operation Manual.

SLEEP indicator**

OPC indicator**

1 – 2

LC-32HT3U/LC-37HT3U/LC-42HT3U

Part names

TV (Rear)

LC-32HT3U/LC-37HT3U

HDMI terminal (INPUT 4)

HDMI terminal (INPUT 5)

PC IN terminal (INPUT 6)

Antenna/Cable in

AUDIO input terminals (INPUT 5)

DIGITAL AUDIO OUTPUT terminal

TRANSPORT terminal*

INPUT 3 terminals

INPUT 2 terminals

INPUT 1 terminals

AUDIO OUTPUT terminals

AC INPUT terminal

NOTE

* The TRANSPORT terminal is designed for hotel communication. Do not use it for other purposes.

1 – 3

Part names

TV (Rear)

LC-42HT3U

Antenna/Cable in

AUDIO input terminals

(INPUT 5)

DIGITAL AUDIO OUTPUT

terminal

TRANSPORT terminal*

LC-32HT3U/LC-37HT3U/LC-42HT3U

HDMI terminal (INPUT 4)

HDMI terminal (INPUT 5)

PC IN terminal (INPUT 6)

INPUT 3 terminals

INPUT 1 terminals

AUDIO OUTPUT terminals

NOTE

* The TRANSPORT terminal is designed for hotel communication. Do not use it for other purposes.

INPUT 2 terminals

AC INPUT terminal

1 – 4

LC-32HT3U/LC-37HT3U/LC-42HT3U

Part names

Remote control unit (Optional accessory: AN-32HTRC)

114

2 3

11 23

13 27

1 TV POWER: Switches the TV power on or enters

standby.

2 DISPLAY: Displays the channel information. 3 SOURCE POWER: Turns the power of the external

equipment on and off.

4 External equipment operational buttons: Operates

the external equipment.

50–9:Sets the channel.

6 • (DOT) 7 INPUT: Selects a TV input source. (TV, INPUT 1, INPUT 2,

INPUT 3, INPUT 4, INPUT 5, INPUT 6)

8VOL 9 SURROUND: Selects Surround settings. 10 FREEZE: Sets the still image. Press again to return to

11 EXIT: Turns off the menu screen. 12 SLEEP: Sets the sleep timer. 13 AUDIO: Selects the MTS/SAP or the audio mode during

14 FUNCTION: Switches the remote control for TV, CBL/

15 LIGHT

16 VIEW MODE: Selects the screen size. 17 ENT: Jumps to a channel after selecting with the 0–9

18 FLASHBACK: Returns to the previous channel or

19 CH 20 MUTE: Mutes the sound. 21 MENU: Displays the menu screen.

23 RETURN: Returns to the previous menu screen.

24 FAVORITE CH

25 FAVORITE: Set the favorite channels. 26 CC: Displays captions from a closed-caption source. 27 AV MODE: Selects an audio or video setting.

/ : Sets the volume.

normal screen.

multi-channel audio broadcasts.

SAT, VCR, DVD and AUDIO operation. Indicator lights up for the current mode. * To enter the code registration mode, you need to press

FUNCTION and DISPLAY at the same time.

: When pressed all buttons on the remote

control unit will light. The lighting will turn off if no operations are performed within about 5 seconds. This button is used for performing operations in low-light situations.

buttons.

external input mode.

/ : Selects the channel.

/ / / / ENTER: Selects a desired item on the

screen.

A, B, C, D: Selects four preset favorite channels in four different categories.

While watching, you can toggle the selected channels by pressing A, B, C and D.

(When the input source is TV, INPUT 1, 2 or 3: STANDARD, MOVIE, GAME, USER, DYNAMIC (Fixed), DYNAMIC. When the input source is INPUT 4, 5 or 6: STANDARD, MOVIE, GAME, PC, USER, DYNAMIC (Fixed), DYNAMIC)

NOTE

• When using the remote control unit, point it at the TV.

•SeetheOPERATION MANUAL FOR HOTEL OPERATOR for details on the functions of each button.

1 – 5

Part names

LC-32HT3U/LC-37HT3U/LC-42HT3U

Remote Replicator (Optional accessory: AN-H06RCU)

5 6 7 8 9 10

1 LEARN indicator: Lights up while storing the TV

settings from the TV to the Remote Replicator.

2 DONE indicator: Lights up when storing or

transferring is

3 TEACH indicator: Lights up while transferring the

TV settings from the Remote Replicator to the TV.

4 MEMORY SELECT indicator: Indicates which

memory bank is selected.

5 LEARN button: Store the TV settings from the TV

to the Remote Replicator.

6 TEACH button: Transfer the TV settings from the

Remote Replicator to the TV.

7 ROOM button: The TV turns off and enters the

ROOM mode when the TV is in the MASTER mode. You can turn on or off the TV when the TV is in the ROOM mode.

8 MASTER button: The TV is turned on and enters

the MASTER mode when the TV is turned off. The menu screen displays when the TV is turned on in the MASTER mode or the ROOM mode. The TV is turned off and enters the PPV TV mode when the TV is in the Normal TV mode.

9 DIAGNOSTICS button: Perform operational tests. 10 MEMORY SELECT button: Select the memory

bank to store or transfer data.

11 TRANSPORT (RJ-11) connector: Connect to the

TV when storing or transferring the data.

nished.

NOTE

• When using the Remote Replicator, point it at the TV.

•SeetheOPERATION MANUAL FOR HOTEL OPERATOR for details on the functions of each button.

• The TRANSPORT (RJ-11) connector is designed for hotel communication. Do not use it for other purposes.

The Remote Replicator is only for hotel operators.

1 – 6

LC-32HT3U/LC-37HT3U/LC-42HT3U

Preparation

Attaching the stand

• Before attaching (or detaching) the stand, unplug the AC cord from the AC INPUT terminal.

• Before performing work spread cushioning over the base area to lay the TV on. This will prevent it from being damaged.

CAUTION

• Attach the stand in the correct direction.

• Be sure to follow the instructions. Incorrect installation of the stand may result in the TV falling over.

LC-32HT3U/37HT3U

1 3

rm that there are 9 screws (all the same

size) supplied with the TV.

Set the post for the stand unit onto the box.

Attach the base to the post. Insert and tighten the 5 screws into the 5

holes on the bottom of the base.

Hex key

Screw

Insert the stand into the openings on the bottom of the TV.

Insert and tighten the 4 screws into the 4 holes on the rear of the TV.

Hex key

Screw

Soft cushion

NOTE

• To detach the stand, perform the steps in reverse order.

1 – 7

LC-32HT3U/LC-37HT3U/LC-42HT3U

Preparation

Attaching the stand

• Before attaching (or detaching) the stand, unplug the AC cord from the AC INPUT terminal.

• Before performing work spread cushioning over the base area to lay the TV on. This will prevent it from being damaged.

CAUTION

• Attach the stand in the correct direction.

• Be sure to follow the instructions. Incorrect installation of the stand may result in the TV falling over.

LC-42HT3U

1 3

rm that there are 8 screws supplied with

the TV.

Short screws ( 4)

(Usedinstep2)

Long screws (

(Used in step 3)

Set the post for the stand unit onto the box.

Attachthebasetothepost. Insert and tighten the 4 short screws into

the 4 holes on the bottom of the base.

Hex key

Short screw

Insert the stand into the openings on the bottom of the TV.

Insert and tighten the 4 long screws into the 4 holes on the rear of the TV.

Hex key

Long screw

Soft cushion

NOTE

• To detach the stand, perform the steps in reverse order.

1 – 8

LC-32HT3U/LC-37HT3U/LC-42HT3U

Preparation

Connecting to the PPV terminal box

Connect the TV and the PPV terminal box as shown.

To power outlet

To room antenna terminal

(Supplied by Pay Per View

RJ-11 cable

provider)

Coaxial cable (Commercially available)

PPV terminal box Hotel server

1 – 9

Appendix

Troubleshooting

LC-32HT3U/LC-37HT3U/LC-42HT3U

Problem

No power

Unit cannot be operated.

Remote control unit does not operate.

Picture is cut off/with sidebar screen.

Strange color, light color, or color misalignment

Power is suddenly turned off.

Possible Solution

Check if you pressed TV POWER on the remote control unit. If the indicator on the TV does not light up, press POWER on the TV. Is the AC cord disconnected? Has the power been turned on?

External influences such as lightning, static electricity, may cause improper operation. In this case, operate the unit after first turning on the power of the TV or unplugging the AC cord and replugging it in after 1 or 2 minutes.

Is the FUNCTION set correctly? Set it to the TV setting position.

Are batteries inserted with polarity (+, Are batteries worn out? (Replace with new batteries.) Are you using it under strong or fluorescent lighting? Is a fluorescent light illuminated near the remote control sensor?

Is the image position correct? Are screen mode adjustments such as picture size made correctly?

Adjust the picture tone. Is the room too bright? The picture may look dark in a room that is too bright. Check the input signal setting.

Is the sleep timer set? Check the power control settings. The unit's internal temperature has increased. Remove any objects blocking vent or clean.

) aligned?

No picture

No sound

The TV sometimes makes a cracking sound.

Is connection to other components correct? Is correct input signal source selected after connection? Is the correct input selected? Is picture adjustment correct? Is "On" selected in "Audio Only"? Is a non-compatible signal being input?

Is the volume too low? Is "Variable" selected in "Output Select" Have you pressed MUTE on the remote control unit?

This is not a malfunction. This happens when the cabinet slightly expands and contracts according to change in temperature. This does not affect the TV's performance.

Troubleshooting-Digital broadcasting

The error message about reception of broadcast

The example of an error message

displayed on a screen

Failed to receive broadcast.

No broadcast now.

Error code

E202

E203 Check the broadcast time in the program guide.

Check the antenna cable. Check that the antenna is correctly setup.

Possible Solution

Cautions regarding use in high and low temperature environments

When the unit is used in a low temperature space (e.g. room, office), the picture may leave trails or appear slightly delayed. This is not a malfunction, and the unit will recover when the temperature returns to normal. Do not leave the unit in a hot or cold location. Also, do not leave the unit in a location exposed to direct sunlight or near a heater, as this may cause the cabinet to deform and the Liquid Crystal panel to malfunction. Storage temperature:

4°F to +140°F (-20°C to +60°C)

1 – 10

LC-32HT3U/LC-37HT3U/LC-42HT3U

Appendix

PC compatibility chart

It is necessary to set the PC correctly to display XGA and WXGA signal. Refer to set PC input signals.

PC Horizontal Frequency VESA StandardResolution Vertical Frequency

720 x 400

VGA

XGA 1024 x 768

WXGA 1360 x 768

DDC is a registered trademark of Video Electronics Standards Association. Power Management is a registered trademark of Sun Microsystems, Inc. VGA and XGA are registered trademarks of International Business Machines Co., Inc.

640 x 480

800 x 600SVGA

31.5 kHz

37.9 kHz

37.5 kHz

35.1 kHz

37.9 kHz

48.1 kHz

46.9 kHz

48.4 kHz

56.5 kHz

60.0 kHz

47.7 kHz

70 Hz

60 Hz 72 Hz 75 Hz 56 Hz 60 Hz 72 Hz 75 Hz 60 Hz 70 Hz 75 Hz 60 Hz

O O O O O O O O O O O

1 – 11

MENU ITEM FOR PPV ROOM MODE

TV & INPUT1㨪5 INPUT6

LC-32HT3U/LC-37HT3U/LC-42HT3U

Sleep Timer Parental CTRL Close Caption Language View Mode Input Select

Function

Sleep Timer Parental CTRL Close Caption Language View Mode Input Select

Option

Input Signal Auto Sync.

1 – 12

LC-32HT3U/LC-37HT3U/LC-42HT3U

Basic adjustment settings

PPV Master Mode TV PPV Master Mode INPUT1/2/3

OPC Backlight Contrast Brightness Color Tint Sharpness Advanced

Color Temp. Black I/P Setting Film Mode 3D-Y/C Monochrome Range of OPC

Reset

Treble Bass Balance Surround Reset

Picture

Audio

Power Control

OPC Backlight Contrast Brightness Color Tint Sharpness Advanced

Color Temp. Black I/P Setting Film Mode 3D-Y/C Monochrome Range of OPC

Reset

Treble Bass Balance Surround Reset

Picture

Audio

Power Control

No Signal Off No Operation Off

EZ Setup CH Setup Antenna Setup-DIGITAL Input Skip Position Language

Digital Noise Reduction Caption Setup

Audio

Setup

Identification

Setup

Option

Digital Setup

PPV TV

No Signal Off No Operation Off

Input Skip Input Label Position Language

Digital Noise Reduction Color System Caption Setup

Audio

Setup

Identification

Setup

Option

Digital Setup

PPV TV

Refer to page 1-15

1 – 13

LC-32HT3U/LC-37HT3U/LC-42HT3U

Basic adjustment settings

PPV Master Mode HDMI (INPUT4/5) PPV Master Mode PC-IN(INPUT6)

OPC Backlight Contrast Brightness Color Tint Sharpness Advanced

Color Temp. Black I/P Setting Film Mode 3D-Y/C Monochrome Range of OPC

Reset

Treble Bass Balance Surround Reset

Picture

Audio

Power Control

OPC Backlight Contrast Brightness Color Tint Sharpness Advanced

Color Temp. Black I/P Setting Film Mode Monochrome Range of OPC

Reset

Treble Bass Balance Surround Reset

Picture

Audio

Power Control

No Signal Off No Operation Off

Setup

Input Skip Input Label Position Language

Option

Digital Noise Reduction HDMI Setup

NOTE

Some menu items may not be displayed depending on the selected input source.

PPV TV

Refer to page 1-15

No Signal Off No Operation Off

Setup

Input Skip Input Signal Auto Sync.

Input Label Fine Sync. Language

Option

Digital Noise Reduction

NOTE

Some menu items may not be displayed depending on the selected input source.

PPV TV

Refer to page 1-15

1 – 14

LC-32HT3U/LC-37HT3U/LC-42HT3U

PPV TV SETTING LIST by PPV SERVICE PROVIDERS

TV Mode PPV System Function Menu Setup Default Channel Default Volume Room Mode CH Re-Map Reset

ONCOMMAND

TV Mode PPV System Default Channel Default Volume Room Mode Label Input CH Re-Map Reset

LODGENET

NXTV

TV Mode PPV System Function Menu Setup Default Channel Default Volume Room Mode CH Re-Map Reset

TV Mode PPV System Default Channel Default Volume Room Mode Label Input CH Re-Map Reset

nSTREAMS

SeaChange

TV Mode PPV System Default Channel Default Volume Room Mode CH Re-Map Reset

1 – 15

Basic adjustment settings

LC-32HT3U/LC-37HT3U/LC-42HT3U

Normal Mode TV

OPC Backlight Contrast Brightness Color Tint Sharpness Advanced

Color Temp. Black I/P Setting Film Mode 3D-Y/C Monochrome Range of OPC

Reset

Treble Bass Balance Surround Reset

Picture

Audio

Normal Mode INPUT1/2/3

Picture

OPC Backlight Contrast Brightness Color Tint Sharpness Advanced

Color Temp. Black I/P Setting Film Mode 3D-Y/C Monochrome Range of OPC

Reset

Audio

Treble Bass Balance Surround Reset

No Signal Off No Operation Off

EZ Setup CH Setup Antenna Setup-DIGITAL Input Skip

Parental CTRL Position Language Reset

Audio Only Digital Noise Reduction Input Select Output Select

Caption Setup Program Title Display Favorite CH

Audio Setup Identification

Power Control

Setup

Option

Digital Setup

Power Control

No Signal Off No Operation Off

Setup

Input Skip Input Label Parental CTRL Position Language Reset

Option

Audio Only Digital Noise Reduction Input Select (except for INPUT3) Output Select Color System Caption Setup Program Title Display

Digital Setup

Audio Setup Identification

1 – 16

LC-32HT3U/LC-37HT3U/LC-42HT3U

Basic adjustment settings

Normal Mode HDMI (INPUT4/5)

Picture

OPC Backlight Contrast Brightness Color Tint Sharpness Advanced

Color Temp. Black I/P Setting Film Mode Monochrome Range of OPC

Reset

Audio

Treble Bass Balance Surround Reset

Menu items for HDMI/PC-IN

Picture

OPC Backlight Contrast Brightness Color Tint Sharpness Advanced

Color Temp. Black I/P Setting Film Mode Monochrome Range of OPC

Reset

Audio

Treble Bass Balance Surround Reset

Power Control

No Signal Off No Operation Off

Setup

Input Skip Input Label Position Language Reset

Option

Audio Only Digital Noise Reduction

HDMI Setup Output

Select

NOTE

Some menu items may not be displayed depending on the selected input source.

Power Control

No Signal Off No Operation Off

Setup

Input Skip Input Signal Auto Sync. Input Label Fine Sync. Language Reset

Option

Audio Only Digital Noise Reduction

Output Select

NOTE

Some menu items may not be displayed depending on the selected input source.

1 – 17

[3] DIMENSIONS

(394.6)

LC-32HT3U/LC-37HT3U/LC-42HT3U

LC-32HT3U

(531)

(589)

(58)

(85)

(200)

/16(700.0)

/32(796)

1945/64(500)

77/8(200)

(394.6)

(343)

/32(83)

Unit: inch/(mm)

/64(500)

/64(97)

LC-37HT3U

(599)

(656)

(57)

(85)

/64(822.6)

/64(913)

2135/64(547)

77/8(200)

(463.8)

(377)

/8(117)

/64(243)

2135/64(547)

353/64(97)

(200)

1 – 18

/64(293)

LC-32HT3U/LC-37HT3U/LC-42HT3U

(526)

LC-42HT3U

(733)

/64 (675)

/32 (58)

/64 (85)

/8 (200)

/64(933)

/32 (1031)

2117/64 (540)

77/8(200)

(526)

/64 (421)

/32 (95)

/64 (540)

Unit: inch/(mm)

(134)

111/2(292)

1 – 19

LC32HT3U

CHAPTER 2. REMOVING OF MAJOR PARTS

Service Manual

[1] REMOVING OF MAJOR PARTS (LC-32HT3U/LC-37HT3U)

1. Remove the SD Card Cover.

2. Remove the 4 lock screws and detach the Stand Base Ass'y.

3. Remove the 9 lock screws, 5 lock screws and detach the Rear Cabinet.

Front Cabinet

SD Card Cover

LC-32HT3U/LC-37HT3U/LC-42HT3U

Stand Base Ass'y

Rear Cabinet

2 – 1

LC-32HT3U/LC-37HT3U/LC-42HT3U

4. Remove the 2 lock screws and detach the Stand Assist Angle.

5. Remove the 4 lock screws and detach the Center Angle-L and R.

6. Remove the 1 lock screw and detach the Stand Area Cover.

7. Remove the 4 lock screws and detach the Stand Fix Angle.

8. Remove the 6 lock screws and detach the MAIN Shield.

MAIN Shield

Center Angle-R

Center Angle-L

Stand Fix Angle

Stand Area Cover

2 – 2

Stand Assist Angle

LC-32HT3U/LC-37HT3U/LC-42HT3U

9. Disconnect all the connectors from all the PWBs.

10.Remove the Top Cover Ass'y. Remove the 2 lock screws from the Top Cover Ass'y and detach the KEY Unit.

Top Cover Ass'y

KEY Unit

2 – 3

LC-32HT3U/LC-37HT3U/LC-42HT3U

11.Remove the 4 lock screws and detach the Speaker-L and R.

12.Remove the 2 lock screws and detach the R/C, LED Unit.

13.Remove the 5 lock screws and detach the Tray Chassis.

Tray Chassis

Speaker-R

R/C, LED Unit

Speaker-L

2 – 4

LC-32HT3U/LC-37HT3U/LC-42HT3U

14.Remove the 2 lock screws, 2 lock screws, 1 lock screw and 2 lock screws. Detach the Jack Angle and DIGITAL MINI PWB Unit.

15.Remove the 6 lock screws and detach the POWER Unit.

16.Remove the 4 lock screws and detach the AV TERMINAL Unit.

17.Remove the 5 lock screws, 3 lock rivets and detach the MAIN PWB Radiator and MAIN Unit.

Jack Angle

DIGITAL MINI

MAIN PWB Radiator

PWB Unit

MAIN Unit

POWER Unit

AV TERMINAL Unit

2 – 5

LC-32HT3U/LC-37HT3U/LC-42HT3U

18.Remove the 6 lock screws and detach the Rug Angle Top-L and R.

19.Remove the 7 lock screws and detach the Rug Angle Bottom-L and R. (LC-32HT3U) Remove the 6 lock screws and detach the Rug Angle Bottom-L and R. (LC-37HT3U)

20.Remove the 2 lock screws and detach the Chassis Fix Angle Top. (LC-32HT3U) Remove the 3 lock screws and detach the Chassis Fix Angle Top. (LC37HT3U)

21.Remove the LCD Panel Module.

LC-32HT3U

Rug Angle Top-R

Rug Angle Bottom-R

Chassis Fix Angle Top

Rug Angle Top-L

Rug Angle Bottom-L

LC-37HT3U

Rug Angle Top-R

Rug Angle Bottom-R

Chassis Fix Angle Top

Rug Angle Top-L

Rug Angle Bottom-L

2 – 6

+ 80 hidden pages