Sharp LC-32A47L-A Schematic

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LC-32A47L(A)

SERVICE MANUAL

No. S89C1LC32A47A

LCD COLOR TELEVISION

MODEL

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.

LC-32A47L(A)

OUTLINE

This manual has been issued to cover the modifications of some parts in reference to the redesigned LCD panel
module of Model LC-32A47L.
In this Service Manual, the modifications from Model LC-32A47L (No. S79A4LC32A47L) are focused on. For what
is left out herein, please refer back to the Service Manual of the previous model LC-32A47L (No. S79A4LC32A47L).
This Service Manual should be referred to as from the July 2009 production units (serial numbers: ****51112 and on).

CONTENTS

OUTLINE AND DIFFERENCES FROM BASE MODEL

OUTLINE.................................................................... i

DIFFERENCES FROM BASE MODEL..................... ii

SAFETY PRECAUTION

IMPORTANT SERVICE SAFETY

PRECAUTION...........................................................iii

PRECAUTIONS A PRENDRE LORS DE LA

REPARATION .......................................................... iv

PRECAUTIONS FOR USING LEAD-FREE

SOLDER ................................................................... v

CHAPTER 1. REMOVING OF MAJOR PARTS

[1] REMOVING OF MAJOR PARTS ...........................1-1

CHAPTER 3. OVERALL WIRING/BLOCK DIAGRAM

[1] OVERALL WIRING DIAGRAM ..............................3-1

[2] SYSTEM BLOCK DIAGRAM .................................3-2

CHAPTER 4. PRINTED WIRING BOARD ASSEMBLIES

[1] MAIN Unit...............................................................4-1

CHAPTER 5. SCHEMATIC DIAGRAM

[1] DESCRIPTION OF SCHEMATIC DIAGRAM.........5-1

[2] MAIN Unit...............................................................5-2

Parts Guide

CHAPTER 2. ADJUSTMENT

[1] ADJUSTMENT PROCEDURE ...............................2-1

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-32A47L(A)

LC-32A47L(A)

OUTLINE AND DIFFERENCES FROM BASE MODEL

Service Manual

OUTLINE

This manual has been issued to cover the modifications of some parts in reference to the redesigned LCD panel module of Model LC-32A47L.

In this Service Manual, the modifications from Model LC-32A47L (No. S79A4LC32A47L) are focused on. For what is left out herein, please refer back
to the Service Manual of the previous model LC-32A47L (No. S79A4LC32A47L).

This Service Manual should be referred to as from the July 2009 production units (serial numbers: ****51112 and on).

Identifying the models with the redesigned LCD panel module

• The models with the redesigned LCD panel module have the “ ” marking added at the end of the model number given on the “Model Label”.

• The models with the redesigned LCD panel module have the “ ” marking in “No. Label” applied on the packing case.

• The models with the redesigned LCD panel module have the “ ” marking in “Back Serial No. Label”.

Interchangeability

• The previous and redesigned LCD panel modules are not interchangeable with each other.

• The redesigned LCD panel module is applicable only on the sets that have been manufactured since July 2009.

Models with the redesigned LCD panel module

Model Label

Add

MODEL NO.

LC-32A47L M0015094

****51112SERIAL NO.

A

No. Label of the packing case (Top)

MODEL NO. LC-32A47L M0015094

****51112SERIAL NO.

No. Label of the packing case (Side)

Add

LC-32A47L

SERIAL NO.
N'DE SERIE

****51112

Back Serial No. Label

Add

A

Add

A

i

DIFFERENCES FROM BASE MODEL

LIST OF CHANGED PARTS

LC-32A47L(A)

Ref. No. Description

PRINTED WIRING BOARD ASSEMBLIES

MAIN Unit DUNTKF030FM11 DUNTKF030FM26 D Some internal parts changed
KEY Unit DUNTKF069FM06 ← ——
LED Unit DUNTKF115FM03 ← ——
POWER Unit RDENCA363WJQZ ← ——

LCD PANEL

32” LCD Panel Module Unit R1LK315T3LZ94 R1LK315T3LF22Z D Change (Unit Replacement Item)

MAIN Unit
D9602 Diode — VHDRB056L40-1Y — Add
FB2601 Ferrite Bead — RBLN-A375WJQZY — Add
FB2602 Ferrite Bead — RBLN-A375WJQZY — Add
FB2615 Ferrite Bead — RBLN-A375WJQZY — Add
FB2633 Ferrite Bead — RBLN-A375WJQZY — Add
FB2634 Ferrite Bead — RBLN-A375WJQZY — Add
FB2635 Ferrite Bead — RBLN-A375WJQZY — Add
FB2636 Ferrite Bead — RBLN-A375WJQZY — Add
FB2637 Ferrite Bead — RBLN-A375WJQZY — Add
P2602 Plug — QPLGNA349WJZZY — Add
Q9602 Transistor — VSMCH6305++-1Y — Add
Q9606 Transistor — VSRT1N141U/-1Y — Add
R9639 Resistor — VRS-CZ1JF104JY — Add
R9640 Resistor — VRS-CZ1JF104JY — Add

LC-32A47L

(No. S79A4LC32A47L)

LC-32A47L(A)

(No. S89C1LC32A47A)

Interchange-

ability

Note

CABINET AND MECHANICAL PARTS
Please refer to a Parts list

PACKING PARTS, ACCESSORIES AND SERVICE JIGS
Please refer to a Parts list

Completely interchangeableA:

Interchangeable from

B:

OLD to NEW

Interchangeability

=

NEWOLD

ψ

NEWOLD

Interchangeable from

C:

NEWtoOLD

Not interchangeableD:

NEW OLD

ψ

X

OLDNEW

ii

LC-32A47L(A)

LC-32A47L(A)

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 CON T I NUE D PROTECTION
AGAINST A RISK OF FIRE REPLACE ONLY WITH
SAME TYPE FUSE.

F701 (250V 5A)
F702 (250V 5A)

• 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.

F721 (250V 2A)
F4731 (250V 2A)

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.

• Plug the AC cord directly into a 110~240 volt AC outlet.

• Using two clip leads, connect a 1.5k ohm, 10 watt resistor paral­leled by a 0.15µF capacitor in series with all exposed metal cabinet
parts and a known earth ground, such as electrical conduit or elec­trical ground connected to an earth ground.

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

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.

iii

LC-32A47L(A)

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.

•

AVERTISSEMENT

1.

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

2.

Débrancher le récepteur avant toute réparation.

PRECAUTION: POUR LA PROTECTION CON­TINUE CONTRE LES RISQUES D'INCENDIE,
REMPLACER LE FUSIBLE

F701 (250V 5A)
F702 (250V 5A)
F721 (250V 2A)
F4731 (250V 2A)

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.

5.

S'assurer qu'il n'y ait pas de danger d'électrocution en vérifiant la
fuite de courant, de la facon suivante:

• Brancher le cordon d'alimentation directem-ent à une prise de cou­rant de 110~240V. (Ne pas utiliser de transformateur d'isolation
pour cet essai).

A l'aide de deux fils à pinces, brancher une résistance de 1.5 kΩ
10 watts en parallèle avec un condensateur de 0.15µF en série
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 5000Ω/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.

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.

iv

LC-32A47L(A)

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

v

LC-32A47L(A)

CHAPTER 1. REMOVING OF MAJOR PARTS

Service Manual

[1] REMOVING OF MAJOR PARTS

1. Removing of Stand Unit and Rear Cabinet Ass’y.

1. Remove the 4 lock screws .

2. Detach the Stand Unit .

3. Remove the 3 lock screws , 10 lock screws and detach the Rear Cabinet Ass’y.

4

Rear Cabinet Ass'y

3

LC-32A47L(A)

Stand Unit

3

2

1

1 – 1

LC-32A47L(A)

2. Removing of Speaker L/R, Control Button Ass’y, Front Cabinet Ass’y, LED Unit and KEY Unit.

1. Disconnect the following connectors from the Main Unit. (RA, SP)

2. Detach the Speaker-L and Speaker-R .

3. Detach the LED Unit .

4. Disconnect the following connector from the LED Unit. (RA)

5. Remove the Control Button Ass’y.

6. Detach the KEY Unit from the Control Button and disconnect the connection cord from the KM connector.

7. Remove the 4 lock screws , 6 hooks and detach the Front Cabinet Ass’y.

6

Front Cabinet Ass'y

4Control Button

Control Button Ass'y

5KEY Unit

[KM]

7

7

[RA] [SP]

7

7

[RA]

3LED Unit

6

[SP]

7

7

2 Speaker-LSpeaker-R

1 – 2

1

3. Removing of Main PWB Shield and Side Cover Ass’y.

1. Remove the 2 lock screws and detach the Side Cover Ass’y .

2. Remove the 2 lock Shafts , 2 lock screws , 6 lock screws and detach the Main PWB Shield .

3. Disconnect the following connector from the Main Unit. (KM)

1

LC-32A47L(A)

4

5

Main PWB Shield

6

2Side Cover Ass'y

3

[KM]

1 – 3

LC-32A47L(A)

4. Removing of Support Angle and Connectors.

1. Remove the 4 lock screws and detach the Support Angle .

2. Disconnect the following connectors from the Main Unit. (PD, LB1, LP, LW)

3. Disconnect the following connectors from the Power Unit. (PD, LB1, LB2)

4. Disconnect the following connector from the Inverter Unit. (CN101)

5. Disconnect the following connector from the LCD Control Unit. (CN1)

POWER Unit INVERTER UnitLCD CONTROL UnitMAIN Unit

[CN101]

[PD]

[LB1]

[LP]

[LW]

[CN1]

2
Support Angle
(Stand Support)

1

[LB1]

[PD]

POWER UnitMAIN Unit

[LB2]

1 – 4