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LC-32/37D43U

SERVICE MANUAL

No. SX6Y9LC37D43U

LCD COLOR TELEVISION

LC-32D43U

MODELS

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 be used.

LC-37D43U

OUTLINE

This model is based on the LC-32D42U/LC-37D42U and partially modified.
For the contents not covered in this Service Manual, accordingly, please refer to the LC-32D42U/LC­37D42U (S06X9LC32D42U) Service Manual.

CONTENTS

DIFFERENCES FROM BASE MODEL

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

SAFETY PRECAUTION

IMPORTANT SERVICE SAFETY PRE-

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

PRECAUTIONS A PRENDRE LORS DE

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

PRECAUTIONS FOR USING LEAD-

FREE SOLDER ............................................... iv

CHAPTER 2. OPERATION MANUAL

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

CHAPTER 3. DIMENSIONS

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

Parts Guide

CHAPTER 1. SPECIFICATIONS

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

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-32/37D43U

LC-32D43U

LCD TV

Service ManualLC-32D43U/LC-37D43UMarketE

DIFFERENCES FROM BASE MODEL

LIST OF CHANGED PARTS

Ref. No. Description LC-32D42U/LC-37D42U LC-32D43U/LC-37D43U Note

PRINTED WIRING BOARD ASSEMBLIES

MAIN Unit DUNTKD862FM04 DUNTKD862FM04 No Changes
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

Refer to the PARTS GUIDE for CABINET PARTS, SUPPLIED ACCESORIES,PACKING PARTS and SERVICE JIGS.

i

LC-32/37D43U

LC-32D43U

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.

AV

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

O

C)

• 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.

ii

LC-32/37D43U

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

1.

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

2.

Débrancher le récepteur avant toute réparation.

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

AV

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

O

C)

VERIFICATIONS CONTRE L'INCEN-DIE ET LE
CHOC ELECTRIQUE

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

3.

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.

4.

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

µ

F

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-32/37D43U

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

iv

LC-32/37D43U

LC-32D43U

CHAPTER 1. SPECIFICATIONS

[1] SPECIFICATIONS

Service Manual

Item

LCD panel

Number of dots

TV
Function

TV-standard (CCIR)

Receiving
Channel

Audio multiplex

Audio out

Terminals

Rear

VHF/UHF

CATV

Digital Terrestrial
Broadcast (8VSB)

Digital cable
(64/256 QAM)

INPUT 1

INPUT 2

INPUT 3

INPUT 4

INPUT 5

Model: LC-32D43U

32 Advanced Super View & BLACK TFT
LCD

3,147,264 dots (1366 768 3 dots)

American TV Standard ATSC/NTSC System

VHF 2-13ch, UHF 14-69ch

1-135ch (non-scrambled channel only)

2-69ch

*1

1-135ch (non-scrambled channel only)

BTSC System

10W 2

AV in, COMPONENT in

S-VIDEO in, AV in

Audio in, COMPONENT in

HDMI in with HDCP

Audio in, HDMI in with HDCP

37 Advanced Super View & BLACK TFT
LCD

Model: LC-37D43U

INPUT 6 15 pin mini D-sub, Audio in (Ø 3.5 mm jack)

ANTENNA

DIGITAL AUDIO OUTPUT

OUTPUT

OSD language

Power Requirement

Power Consumption

Weight

w/o stand

with stand

Dimension

*2

(W H D)

w/o stand

with stand

Operating temperature

*1

Emergency alert messages via Cable are unreceivable.

*2

The dimensional drawings are shown on the inside back cover.

75 Unbalance, F Type 1 for Analog (VHF/UHF/CATV) and Digital (AIR/CABLE)

Optical Digital audio output 1 (PCM/Dolby Digital)

Audio out

English/French/Spanish

AC120V,60Hz

175 W (0.95 W Standby with AC 120V)

36.4 lbs./16.5 kg

43.0 lbs./19.5 kg

11

31

/322059/64353/64inch

11

31

/322313/64937/64inch

185 W (0.95 W Standby with AC 120V)

43.0 lbs./19.5 kg

50.7 lbs./23.0 kg

61

/642337/64353/64inch

35

61

35

/642527/321135/64inch

32°F to 104°F (0°C to 40°C)

• As part of policy of continuous improvement, SHARP reserves the right to make design and speci
improvement without prior notice. The performance specication

gures indicated are nominal values of production units.

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

cation changes for product

1 – 1

LC-32D43U

LCD TV

Service ManualLC-32D43U/LC-37D43UMarketE

CHAPTER 2. OPERATION MANUAL

[1] OPERATION MANUAL

Part names

TV (Front)

LC-32/37D43U

Remote control sensor

OPC sensor*

NOTE

*OPC: Optical Picture Control

TV (Rear)

HDMI terminal (INPUT 4)

HDMI terminal (INPUT 5)

PC IN terminals (INPUT 6)

Antenna/Cable in

Channel buttons

(CH /)

Volume
buttons

-

(VOL /)

+

OPC indicator*

SLEEP indicator

POWER indicator

INPUT button

POWER button

AUDIO terminals (INPUT 5)

DIGITAL AUDIO OUTPUT terminal

INPUT 3 terminals

INPUT 2 terminals

INPUT 1 terminals

AUDIO OUTPUT terminals

AC INPUT terminal

2 – 1