SHARP LC-19SK25U, LC-19SK25U-W, LC-19SB25U, LC-19SB25U-W, LC-19SB15U Diagram

Revised Edition

LCD COLOR TELEVISION

LC-19SK25U
LC-19SK25U-W
LC-19SB25U
LC-19SB25U-W
LC-19SB15U

N38B2LC19K25U

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.

The revised edition added the schematic of SUB3(sound) after Page 81.

CONTENTS

ﾈ

IMPORTANT SERVICE SAFETY PRECAUTION ..........................................................................................2

ﾈ

SPECIFICATIONS .........................................................................................................................................5

ﾈ

OPERATION MANUAL ..................................................................................................................................7

ﾈ

DIMENSIONS ..............................................................................................................................................11

ﾈ

REMOVING OF MAJOR PARTS .................................................................................................................13

ﾈ

ADJUSTING PROCEDURE OF EACH SECTION ......................................................................................18

ﾈ

PUBLIC MODE SETTING PROCEDURE ...................................................................................................40

ﾈ

TROUBLESHOOTING TABLE ..................................................................................................................... 45

ﾈ

MAJOR IC INFORMATIONS ....................................................................................................................... 53

ﾈ

BLOCK DIAGRAM .......................................................................................................................................54

ﾈ

OVERALL WIRING DIAGRAM .................................................................................................................... 56

ﾈ

DESCRIPTION OF SCHEMATIC DIAGRAM ..............................................................................................58

ﾈ

SCHEMATIC DIAGRAM

RC/LED Unit ..............................................................................................................................................59

MAIN Unit ..................................................................................................................................................60

SUB Unit .................................................................................................................................................... 78

POWER_INVERTER Unit ..........................................................................................................................84

KEY Unit ....................................................................................................................................................86

ﾈ

PRINTED WIRING BOARD ASSEMBLIES .................................................................................................87

ﾈ

REPLACEMENT PARTS LIST ...................................................................................................................105

ﾈ

PACKING OF THE SET ............................................................................................................................. 124

LC-19D45U

Page

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

2

LC-19SK25U/U-W
LC-19SB25U/U-W
LC-19SB15U
LC-19D45U

A V

DVM

AC SCALE

1.5k ohm
10W

TO EXPOSED
METAL PARTS

CONNECT TO
KNOWN EARTH
GROUND

0.15 µF

TEST PROBE

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.

C A U T I O N: F O R C O N T I N U E D
PROTECTION AGAINST A RISK OF
FIRE REPLACE ONLY WITH SAME
TYPE F7502 (2.5A, 250V) FUSE.

BEFORE RETURNING THE RECEIVER
(Fire & Shock Hazard)

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

1. 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.

2. 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.

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

Plug the AC cord directly into a 120 volt AC outlet,

•

and connect the DC power cable into the receiver's
DC jack. (Do not use an isolation transformer for this
test).

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.

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 0.75V peak (this corresponds to 0.5

mA. peak AC.) or more is excessive and indicates
a potential shock hazard which must be corrected
before returning the monitor to the owner.

SAFETY NOTICE

Many electrical and mechanical parts in LCD television
have special safety-related characteristics.
Thes e c haracter istic s are often n o t eviden t from
visu a l inspecti o n , nor can p r o tection a fford e d 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 Lists and
Schematic Diagrams.
For continued protection, replacement parts must be
identical to those used in the original circuit.
The use of 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-19SK25U/U-W

A V

DVM

AC SCALE

1.5k ohm
10W

TO EXPOSED
METAL PARTS

CONNECT TO
KNOWN EARTH
GROUND

0.15 µF

TEST PROBE

LC-19SB25U/U-W

LC-19SB15U

LC-19D45U

PRECAUTIONS A PRENDRE LORS DE LA REPARATION

La réparation ne peut être effectuée que par un technicien spécialisé qui s'est
parfaitement accoutumé à toute vérification de sécurité et aux conseils suivants.

AVERTISSEMENT

1. Pour la sécurité continue, n'entreprendre aucune
modification de tout circuit.

2. Débrancher l'alimentation CA avant la réparation.

PRECAUTION: POUR LA
PROTECTION CONTINUE
CONTRE LES RISQUES
D'INCENDIE, REMPLACER LE
FUSIBLE PAR UN FUSIBLE DE
MEME TYPE F7502 (2.5A, 250V).

AVANT DE RENDRE LE RECEPTEUR A L’UTI­LISATEUR (Incendie et choc électrique)

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

1. 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.

2. Inspecter tous les dispositifs de protection comme
le s bo u t on s d e co m m an d e n o n- m é ta l l iq u es,
les isolants, le dos du coffret, les couvercles ou
bl i n dages de réglag e e t d e c ompar t iment, les
rés eaux de rési stanc e-capa cité, les iso lateu rs
mécaniques, etc.

3. 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 120V. (Ne pas utiliser de
transformateur d'isolation pour cet essai).

A l ' ai d e d e de u x f i l s à pi n c es, br a nc h e r u ne

•

résistance de 1.5kΩ 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 CA en
travers de la résistance.

Toucher avec la sonde d'essai les pièces métalliques

•

expo sées qui prés entent une voie de retour au
châssis (antenne, coffret métallique, tête des vis,
arbres de commande e t 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 p olarisée d oit être u t ilisée d ans 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.

AVIS POUR LA SECURITE

De nombreuses pièces, éle ctr iques et mécaniques,
dans les téléviseurs de l'afficharge à cristaux liquides
présentent des caractéristiques spéciales relatives à la
sécurité.
Ces caracténstiques ne sont souvent pas évidentes
à vu e. L e d e g r é d e pr o t e c t io n n e p eu t p a s être
nécessairement augmentée en utilisant des pièces de
remplacement étalonnées pour haute tension, puissance,
etc.
Les p i èces de re m p lace m e n t q u i prés e n t ent c e s

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 pr otec tion, ces pièc es do ivent ê tre
identiques à celles utilisées dans le circuit d'origine.
L' u t il i sa t i o n de pi è ce s q u i n ' on t p a s l e s mê m e s
caractér istiques que les piè ces recommandées par
l'usine, indiquées dans ce manuel, peut provoquer des
électrocutions, incendies ou autres accidents.

3

4

LC-19SK25U/U-W
LC-19SB25U/U-W
LC-19SB15U
LC-19D45U

Precautions for using lead-free solder

1 Employing lead-free solder

"All 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.

2 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.

3 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
Part No,
ZHNDAi123250E J
ZHNDAi126500E J
ZHNDAi12801KE J

Description Code

★

0.3mm 250g(1roll) BL

φ

0.6mm 500g(1roll) BK

φ

1.0mm 1kg(1roll) BM

φ

SPECIFICATIONS

LC-19SK25U/U-W
LC-19SB25U/U-W

LC-19SB15U

LC-19D45U

Item

LCD panel

Resolution

TV
Function

TV-standard (CCIR)

Receiving
Channel

Audio multiplex

Audio out

Terminals

INPUT 1

INPUT 2

INPUT 3

INPUT 4

Headphone

ANTENNA

DIGITAL AUDIO OUTPUT

OSD language

Power Requirement

Power Consumption

VHF/UHF

CATV(analog)

Digital Terrestrial
Broadcast (8VSB)

Digital Cable

*1

(64/256 QAM)

Model: LC-19SK25U/LC-19SK25U-W/LC-19SB25U/LC-19SB25U-W/LC-19SB15U

18.5o screen size class Advanced Super View & BLACK TFT LCD
( Diagonal Measurement: 181/

1,049,088 pixels (1,366

g

768)

)

o

2

American TV Standard ATSC/NTSC System

VHF 2-13ch, UHF 14-69ch

1-135ch (STD, HRC, IRC)

2-69ch

1-135ch

BTSC System

2W

2

g

COMPONENT in

AV in, S-VIDEO in

HDMI in with HDCP(480P, 720P/60Hz, 1080I/60Hz, VGA), HDMI Analog Audio in

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

Ø 3.5 mm jack (Audio Output)

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

75

q

Optical Digital audio output

1 (Dolby Digital)

g

English/French/Spanish

AC 120 V, 60 Hz

44 W (0.5 W Standby with AC 120V)

Weight

TV + stand

TV only

Dimension

*2

(W g H g D)

TV + stand

TV only

Operating temperature

*1

Emergency alert messages via Cable are unreceivable.

*2

The dimensional drawings are shown on the inside back cover.

11.4 lbs./5.2 kg

10.3 lbs./4.7 kg

3

18

3

18

32°F to e104°F (0°C to e40°C)

e

11

/16

14

g

/64

63

/64 inch

7

g

/16 g 12 19/32 g 2 61/64 inch

• As part of policy of continuous improvement, SHARP reserves the right to make design and specification changes for product

improvement without prior notice. The performance specification figures indicated are nominal values of production units.
There may be some deviations from these values in individual units.

5

6

LC-19SK25U/U-W
LC-19SB25U/U-W
LC-19SB15U
LC-19D45U

SPECIFICATIONS(Continued)

Item

LCD panel

Resolution

TV
Function

TV-standard (CCIR)

Receiving
Channel

Audio multiplex

Audio out

Terminals

INPUT 1

INPUT 2

INPUT 3

INPUT 4

Headphone

ANTENNA

DIGITAL AUDIO OUTPUT

OSD language

Power Requirement

Power Consumption

VHF/UHF

CATV(analog)

Digital Terrestrial
Broadcast (8VSB)

Digital Cable

*1

(64/256 QAM)

Model: LC-19D45U

18.5o screen size class Advanced Super View & BLACK TFT LCD
( Diagonal Measurement: 181/

1,049,088 pixels (1,366

g

768)

)

o

2

American TV Standard ATSC/NTSC System

VHF 2-13ch, UHF 14-69ch

1-135ch (STD, HRC, IRC)

2-69ch

1-135ch

BTSC System

2

2W

g

COMPONENT in

AV in, S-VIDEO in

HDMI in with HDCP(480P, 720P/60Hz, 1080I/60Hz, VGA), HDMI Analog Audio in

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

Ø 3.5 mm jack (Audio Output)

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

75

q

Optical Digital audio output

1 (Dolby Digital)

g

English/French/Spanish

AC 120 V, 60 Hz

44 W (0.5 W Standby with AC 120V)

Weight

TV + stand

TV only

Dimension
(W

H g D)

g

*2

TV + stand

TV only

Operating temperature

*1

Emergency alert messages via Cable are unreceivable.

*2

The dimensional drawings are shown on the inside back cover.

11.9 lbs./5.4 kg

10.1 lbs./4.5 kg

3

18

/16 g 14 11/64 g 7 63/64 inch

3

/16 g 12 19/32 g 3 1/32 inch

18

32°F to e104°F (0°C to e40°C)

e

• As part of policy of continuous improvement, SHARP reserves the right to make design and specification changes for product
improvement without prior notice. The performance specification figures indicated are nominal values of production units.
There may be some deviations from these values in individual units.

Part names

20

TV (Front)

LC-19SK25U/U-W
LC-19SB25U/U-W

LC-19SB15U

LC-19D45U

OPERATION MANUAL

Remote control sensor

*OPC: Optical Picture Control

TV (Side/Rear)

AC INPUT
terminal

OPC sensor*

OPC indicator

POWER indicator

INPUT 4 terminals
(PC IN)

INPUT 3 terminals
(HDMI)

POWER

button

MENU

button

INPUT

button

Channel

buttons

(CHr/

Volume
buttons

(VOLk/l)

s

HEADPHONE terminal

DIGITAL AUDIO OUTPUT
terminal

INPUT 1 terminals

INPUT 2 terminals
Antenna/Cable in

)

Regarding the headphone jack

• Use headphones with a stereo mini plug (Ø 3.5 mm).

• Be sure to unplug headphones from the jack when they are not in use.

• The speakers do not output volume when headphones are plugged in.

• You can set the volume to different levels for each input source.

Volume display when
headphones are plugged in

7

8

LC-19SK25U/U-W
LC-19SB25U/U-W
LC-19SB15U
LC-19D45U

Part names

Remote control unit

1 POWER: Switch the TV power on or enters standby.
2 DISPLAY: Display the channel information.
3 CC: Display captions from a closed-caption source.

4 0 – 9: Set the channel.
5 • (DOT)

6 FLASHBACK: Return to the previous channel or

external input mode.

7 VIEW MODE: Select the screen size.
8 FREEZE: Set the still image. Press again to return to

normal screen.

9 a/b/c/d/ENTER: Select a desired item on the

screen.

10 EXIT: Turn off the menu screen.
11 FAVORITE CH

A, B, C, D: Select 4 preset favorite channels in 4

different categories.

While watching, you can toggle the selected channels

by pressing A, B, C and D.

12 SLEEP: Set the sleep timer.
13 AV MODE: Select an audio or video setting. (When

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

14 MUTE: Mute the sound.
15 AUDIO: Selects the MTS/SAP or the audio mode

during multi-channel audio broadcasts.

16 VOL k/l: Set the volume.
17 CHr/s: Select the channel.
18 ENT: Jumps to a channel after selecting with the 0–9

buttons.

19 INPUT: Select a TV input source. (TV, INPUT 1,

INPUT 2, INPUT 3, INPUT 4)

20 PC: Quickly access to PC mode.
21 MENU: Display the menu screen.
22 RETURN: Return to the previous menu screen.

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

Part names

Kitchen Remote control unit (LC-19SK25U/LC-19SK25U-W/LC-19D45U)

LC-19SK25U/U-W
LC-19SB25U/U-W

LC-19SB15U

LC-19D45U

1 KITCHEN TIMER/CLOCK SET/ALARM:
Set the kitchen timer, clock or alarm.
2 MIN/HOUR :
Set the minute of kitchen timer and the hour of clolck or alarm.
3 SEC/MIN :
Set the second of kitchen timer and the minute of clock or alarm.

4 SET/STOP :
Confirm setting or stop beeper sound.
5 LIGHT :
Light on the remote control LCD backlight.
6,7 CHr/CHs :
Select the channel.
8 VOL+ :
To increase the volume.
9 VOL- :
To decrease the volume.
10 POWER :
Switch the TV power on or enters standby.

• The method of using the Kitchcen Remote control unit, please see page 50~52 of operation manual.

9

10

LC-19SK25U/U-W
LC-19SB25U/U-W
LC-19SB15U
LC-19D45U

Basic adjustment settings

Menu items for TV/INPUT 1/2 Menu items for HDMI/PC-IN

OPC
Backlight
Contrast
Brightness
Color
Tint
Sharpness
Advanced

C.M.S
Color Temp.
Film Mode
3D-Y/C
Monochrome
I/P Setting

Reset

Treble
Bass
Balance
Reset

No Signal Off
No Operation Off

OPC
Backlight
Contrast
Brightness
Advanced

C.M.S
Color Temp.
Monochrome

Reset

Treble
Bass
Balance
Reset

No Signal Off
No Operation Off
Power Management

EZ Setup
CH Setup
Input Label
Parental CTRL
Position
Rotate
Language
Reset

DNR
Audio Only
Digital Audio
Color System
Digital Caption Setup
Favorite CH

Input Label
Parental CTRL
Position
PC Setup
HDMI Audio Select
HDMI Auto View
Rotate
Language
Reset

Audio Only

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

DIMENSIONS

10

(254)

18

3

/16

(462)

12

19

/32 (320)

1

37

/64 (40)

16

7

/32

(411.8)

9

5

/32

(232.4)

14

11

/64 (360)

8

37

/64 (218)

3

15

/16

(100)

3

15

/16

(100)

3

17

/64

(83)

7

63

/64 (203)

2

61

/64 (75)

2

61

/64

(75)

1

59

/64

(49)

LC-19SK25U/U-W
LC-19SB25U/U-W

LC-19SB15U

LC-19D45U

LC-19SK25U/LC-19SK25U-W/LC-19SB25U/LC-19SB25U-W/LC-19SB15U

Unit: inch (mm)

11

12

LC-19SK25U/U-W
LC-19SB25U/U-W
LC-19SB15U
LC-19D45U

10

(254)

18

3

/16

(462)

12

19

/32 (320)

1

37

/64 (40)

16

7

/32 (411.8)

9

5

/32

(232.4)

14

11

/64 (360)

8

37

/64 (218)

3

15

/16

(100)

3

15

/16

(100)

3

17

/64 (83)

7

63

/64

(203)

2

53

/64

(72) 3

5

/8 (92)

2

3

/64

(51)

3

1

/32

(77)

LC-19D45U

DIMENSIONS(Continued)

Unit: inch (mm)

REMOVING OF MAJOR PARTS

Cabinet B

Cabinet A

3

3

3

2

1

4

Stand HINJI Cover

Stand

5

5

Inverter PWB

Main PWB

BTN PWB

LED PWB

(LC-19SK25U/LC-19SK25U-W)

1. Remove the Stand HINGI Cover fixing screw (1 pc.).

2. Remove the stand fixing screws (4 pcs.).

3. Remove the cabinet B fixing screws (10 pcs.).

4. Remove the cabinet B after opening from the direction of an arrow.

5. Disconnect all the connectors from all the PWBs.

LC-19SK25U/U-W
LC-19SB25U/U-W

LC-19SB15U

LC-19D45U

13

14

LC-19SK25U/U-W
LC-19SB25U/U-W
LC-19SB15U
LC-19D45U

Cabinet B

Cabinet A

3

2

1

3

3

4

Stand HINJI Cover

Stand

1

5

5

Inverter PWB

Main PWB

BTN PWB

LED PWB

Sub PWB

(LC-19D45U)

1. Remove the Stand HINGI Cover fixing screw (1 pc.) and the handle fixing screws (4 pcs).

2. Remove the stand fixing screws (4 pcs.).

3. Remove the cabinet B fixing screws (10 pcs.).

4. Remove the cabinet B after opening from the direction of an arrow.

5. Disconnect all the connectors from all the PWBs.

(LC-19SB25U/LC-19SB25U-W/LC-19SB15U)

Cabinet B

Cabinet A

3

2

1

5

5

3

3

4

Stand HINJI Cover

Stand

Inverter PWB

Main PWB

BTN PWB

LED PWB

Sub PWB

1. Remove the Stand HINGI Cover fixing screw (1 pc.).

2. Remove the stand fixing screws (4 pcs.).

3. Remove the cabinet B fixing screws (10 pcs.).

4. Remove the cabinet B after opening from the direction of an arrow.

5. Disconnect all the connectors from all the PWBs.

LC-19SK25U/U-W
LC-19SB25U/U-W

LC-19SB15U

LC-19D45U

15

16

LC-19SK25U/U-W
LC-19SB25U/U-W
LC-19SB15U
LC-19D45U

Main PWB

Power PWB

Sub PWB

LED PWB

LED PWB

Speaker (L)

Speaker Angle (L)

Speaker Angle (R)

Speaker (R)

8

8

8

9

8

7

6

6

9

10

11

12

12

11

6. Remove the vesa angle fixing screws (4 pcs.).

7. Remove the 3 lock screws from Main Shield.

8. Remove the 9 lock screws from the sub PWB and main PWB and power PWB and AC angle. Detach the sub
PWB and main PWB and power PWB from LCD assembly.

9. Remove the 3 lock screws from the control button assembly and the source PWB Shield.

10. Remove the LED PWB fixing screws (1 pcs.).

11. Remove the 2 lock screws each from the right and left speakers ass’y and take out both the speakers ass’y.

12. Remove the 4 lock screws each from the right and left speaker angle.

LC-19SK25U/U-W

5

5

Inverter PWB

Main PWB

BTN PWB

LED PWB

Sub PWB

LC-19SB25U/U-W

LC-19SB15U

LC-19D45U

Precautions in servicing the side-B (backside) of the main PWB unit

ﾈ

1. Remove the lock screws (2 pcs.) from the main PWB, detach the PWB from the set, and then turn it over.

2. Connect the service-specific extension cable (QCNW-E542WJZZ) between the main PWB (SC1201) and the
sub PWB (P501).

3. Connect the service-specific extension cable (QCNW-E542WJZZ) between the main PWB (SC1202) and the
sub PWB (P502).

4. Connect the service-specific extension cable (QCNW-D431WJZZ) between the main PWB (SC1204) and the
power PWB (SC7501).

5. Connect the service-specific extension cable (QCNW-C458WJQZ) between the main PWB (SC9201) and the
panel PWB (CN1).

Precautions in servicing the side-B (backside) of the power PWB unit

ﾈ

1. Remove the lock screws (4 pcs.) from the power PWB unit, detach the PWB from the set, and then turn it over.

2. Connect the service-specific extension cable (QCNW-D431WJZZ) between the power PWB (SC7501) and the
main PWB (SC1204).

Precautions in servicing the side-B (backside) of the sub PWB unit

ﾈ

1. Remove the lock screws (2 pcs.) from the sub PWB unit, detach the PWB from the set, and then turn it over.

2. Connect the service-specific extension cable (QCNW-E542WJZZ) between the sub PWB (P501) and the main
PWB (SC1201).

3. Connect the service-specific extension cable (QCNW-E542WJZZ) between the sub PWB (P502) and the main
PWB (SC1202).

Step Part No. Description

2 QCNW-E542WJZZ Extension Cable 23-pin Main (SC1201)-Sub (P501)

3 QCNW-E542WJZZ Extension Cable 23-pin Main (SC1202)-Sub (P502)

4 QCNW-D431WJZZ Extension Cable 15-pin Main (SC1204)-Power (SC7501)

5 QCNW-C458WJQZ Extension Cable 80-pin Main(SC9201)-Panel(CN1)

17

18

LC-19SK25U/U-W
LC-19SB25U/U-W
LC-19SB15U
LC-19D45U

Main PWB P801

1 D5V TXD MPU 2

3 RESET MPU MODE MPU 4

5 RXD MPU M 32 TDI 6

7 BU3.3V M32 TDO 8

9 M 32 TRST M32 TCK 10

11 GND M32 TMS 12

13 ASEBRKAK_N ASEMDO 14

15 TRST_N TCK 16

17 TDI TDO 18

19 TMS RESET_N 20

EJ-Writer DTV

1 TCK GND/NC 8

2 TRST_N GND/ASEMD0 9

3 TDO GND 10

4 ASEBRKAK_N NC/3.3V 11

5 TMS GND 12

6 TDI GND 13

7 RESET_N GND 14

ADJUSTING PROCEDURE OF EACH SECTION

The adjustment values are set to the optimum conditions at the factory before shipping .If a value should become
improper or an adjustment is required due to part replacement, make an adjustment according to the following
procedure.

1. After replacement of the any PWB and/or IC for repair, please note the following

1.1

When replacing the unit DUNTKE352FM02, make sure to prepare the new unit loaded with updated software.

1.2 Special Equipment

1.2.1 Renesas E8A, the SUB microprocessor software Writer

1.2.2 Sophia systems DTV EJ-Writer, the Main software Writer

1.2.3 Convertor 1, please refer to following schematic and make one.

1.2.4 Convertor 2, please refer to following instruction and make one.

2. Upgrading of each microprocessor software

2.1 Sub microprocessor software version upgrade

1). Install “Flash Development Toolkit” in CD-ROM.

Connect E8a Emulator Debugger to PC from USB port. (driver in CD ROM)

2). Connect E8 writer to LCD’s 20PIN port which near INPUT4 terminal.

It may need a converter (see the “convertor1).

3). Run “Flash Development Toolkit” in start menu.

4). Choose “Create a new project workspace”.

LC-19SK25U/U-W
LC-19SB25U/U-W

LC-19SB15U

LC-19D45U

If second time, you can select “open a recent project work”.
Choose “OK”.

5). Input any name, and remember the Directory.

19

20

LC-19SK25U/U-W
LC-19SB25U/U-W
LC-19SB15U
LC-19D45U

6). Choose Device: R8C R5F21246

7). Select “E8a” and Next.

8). Next

LC-19SK25U/U-W
LC-19SB25U/U-W

LC-19SB15U

LC-19D45U

9). Finish it.

21

22

LC-19SK25U/U-W
LC-19SB25U/U-W
LC-19SB15U
LC-19D45U

10). Menu->Device->Connect to Device

11). Choose Target Power: 3.3V

12). OK

13). Connection Complete

LC-19SK25U/U-W
LC-19SB25U/U-W

LC-19SB15U

LC-19D45U

14). Right hit the Project file, and choose “Add Files…”

23

24

LC-19SK25U/U-W
LC-19SB25U/U-W
LC-19SB15U
LC-19D45U

15). Add the MOT file, which you want to writer to IC. After it, the MOT file name will display in it.

16). Right hit the MOT file and choose “Download file”, the begin downloading.

17). After downloading, it will hit that “Image successfully written to device”.

LC-19SK25U/U-W
LC-19SB25U/U-W

LC-19SB15U

LC-19D45U

18). Then SUB soft writer finish.

25

26

LC-19SK25U/U-W
LC-19SB25U/U-W
LC-19SB15U
LC-19D45U

2.2 Main software version upgrade

Install soft in CD- ROM : WATCHPOINT-EJW\Disk1\SETUP.EXE
USB Driver: CD-ROM folder “USB Driver”. Unzip “DTV FILES_Unicorn” to root install directory.
Make a connecting (refer to “convertor2”)

1). Connect writer to pc by USB, connect writer to 20 pin socket in main pwb by SH2/SH3 and connecting.

2). AC in

Then press Enter

LC-19SK25U/U-W
LC-19SB25U/U-W

LC-19SB15U

LC-19D45U

4). Enter menu Resource->ICE Environment… ,and set the JTAG Clock to 8.33MHz.

27

28

LC-19SK25U/U-W
LC-19SB25U/U-W
LC-19SB15U
LC-19D45U

5). Enter menu Resource->Flash Memory->Device setup
Maker: SPANSION Size: 4M
Type: MBM29PL32TM/BM 16BIT

1. Start=0x00000000 “ADD”

2. Start=0xa0000000 “ADD”

6). Flash Memory setup:
Start=0x0b800000 Range=0x1000
Press “Update work memory” then close.

LC-19SK25U/U-W
LC-19SB25U/U-W

LC-19SB15U

LC-19D45U

7). Press CMD and press BATCH

29

30

LC-19SK25U/U-W
LC-19SB25U/U-W
LC-19SB15U
LC-19D45U

8). Press the GREEN character, and press ENTER

9).