Sharp LC-15L1US Schematic

LC-15L1U-S

SERVICE MANUAL

S24O6LC-15L1U

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.

CONTENTS

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

» SPECIFICATIONS ........................................................................................................................................5

» OPERATION MANUAL .................................................................................................................................6

» DIMENSIONS ...............................................................................................................................................9

» REMOVING OF MAJOR PARTS ................................................................................................................10

» ADJUSTING PROCEDURE OF EACH SECTION .....................................................................................16

» TROUBLE SHOOTING TABLE...................................................................................................................19

» CHASSIS LAYOUT .....................................................................................................................................31

» BLOCK DIAGRAM......................................................................................................................................34

» OVERALL WIRING DIAGRAM ...................................................................................................................38

» DESCRIPTION OF SCHEMATIC DIAGRAM .............................................................................................40

» SCHEMATIC DIAGRAM .............................................................................................................................41

» PRINTED WIRING BOARD ASSEMBLIES..............................................................................................106

» REPLACEMENT PARTS LIST..................................................................................................................123

» PACKING OF THE SET ............................................................................................................................149

LC-15L1U-S

Page

SHARP CORPORATION

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

LC-15L1U-S

2

3

3

IMPORTANT SERVICE SAFETY PRECAUTION

Ë

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 A GAINST A RISK OF
FIRE REPLACE ONLY WITH SAME
TYPE F3801 (5A, 250V), F3802 (1.6A,
250V), F3803 (1.25A, 250V), F3804

A V

(4A, 250V), F5701 (2A, 250V), F9001
(6.3A, 250V), F1 (2.5A, 125V) AND F2
(1A, 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 110~240 volt A C 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 ha ving 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.

DVM

AC SCALE

1.5k ohm
10W

0.15 µF

TEST PROBE

TO EXPOSED
METAL PARTS

CONNECT TO
KNOWN EARTH
GROUND

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SAFETY NOTICE

Many electrical and mechanical parts in LCD 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 , w attage , etc.
Replacement parts which have these special safety
characteristics are identified in this manual; electrical

and shaded areas in the

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.

components having such features are identified b y " å"

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2

Replacement Parts Lists

.

and

LC-15L1U-S

2

2

2

VTVM

ECHELLE CA

1.5k ohm
10W

0.15 µF

SONDE D'ESSAI

AUX PIECES
METALLIQUES
EXPOSEES

BRANCHER A UNE
TERRE CONNUE

PRECAUTIONS A PRENDRE LORS DE LA REPARATION

Ë

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

AVERTISSEMENT

exposées du coffret et une terre connue comme une
conduite électrique ou une prise de terre branchée à la

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

2. Débrancher le récepteur avant toute réparation.

terre.

• Utiliser un voltmètre CA d'une sensibilité d'au moins
5000Ω/V pour mesurer la chute de tension en travers
de la résistance.

A V

PRECAUTION: POUR LA

PROTECTION CONTINUE
CONTRE LES RISQUES
D'INCENDIE, REMPLACER LE
FUSIBLE PAR UN FUSIBLE DE
MEME TYPE F3801 (5A, 250V),
F3802 (1.6A, 250V), F3803 (1.25A,
250V), F3804 (4A, 250V), F5701 (2A,
250V), F9001 (6.3A, 250V), F1 (2.5A,
125V), F2 (1A, 250V).

• 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.)
Tous les courants mesurés ne doivent pas dépasser
0,5 mA.

VERIFICATIONS CONTRE L'INCEN-DIE ET
LE CHOC ELECTRIQUE

Avant de rendre le récepteur à l'utilisateur, effectuer

Dans le cas contraire, il y a une possibilité de choc
électrique qui doit être supprimée avant de rendre le
récepteur au client.

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 les
boutons de commande non-métalliques, les isolants,
le dos du coffret, les couvercles ou blindages de réglage
et de compartiment, les réseaux de résistance-capacité,
les isolateurs 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 110-240V. (Ne pas utiliser de
transformateur d'isolation pour cet essai).

• A l'aide de deux fils à pinces, brancher une résistance
de 1.5kΩ 10 watts en parallèle avec un condensateur
de 0,15µF en série avec toutes les pièces métalliques

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AVIS POUR LA SECURITE

De nombreuses pièces, électriques et mécaniques, dans
les téléviseurs 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

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identifiées par la marque " å " 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.

3

LC-15L1U-S

åCAUTION

BEFORE BATTERY DESTROY

Ë

LITHIUM-ION BATTERY

BATTERY DISPOSAL
This Product Contains Lithium-ion Battery.
This battery must be disposed of properly. Remove the battery from the product and contact your local
environmental agencies for information on recycling and disposal options.

TRAITEMENT DES PILES USÉES
Ce produit contient une pile á Ion-Lithium
Cette pile usée doit être traitée Correctement. Enlevez la pile du produit et prenez contact avec votre
agence environnementale locale pour des informations sur les méthodes de recyc lage et de traitement.

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:

L Fa

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, remov e 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. Mak e 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 allo y ed 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, ★ Description Code
ZHNDAi123250E J φ0.3mm 250g(1roll) BL
ZHNDAi126500E J φ0.6mm 500g(1roll) BK
ZHNDAi12801KE J φ1.0mm 1kg(1roll) BM

4

SPECIFICATIONS

LC-15L1U-S

Items

LCD panel 15" Advanced Super View & BLACK TFT LCD
Number of dots 921,600 dots VGA
Video color systems N358

Destination USA/Canada
TV Standard (CCIR) M/NTSC

TV function TV Tuning System PLL 181 ch.

STEREO MTS+SAP

CATV 125 ch.
Y/C FILTER 3-LINE COMB FILTER
Brightness 430 cd/m
Lamp life (Fluorescent lamp) 60,000 hours
Viewing angles H: 170° V: 170°
Audio amplifier 2.1 W × 2
Speakers 1 37/64 inch (4 cm), 2 pcs

AV-IN1 AV-IN1, AV-IN1 (S-VIDEO), MONITOR-OUT, MONITOR-OUT (S-VIDEO)

AV-IN2 AV-IN2/AV-OUT
Terminals

OSD language English/French/Spanish
Power supply TV main unit: DC 15V, Wireless center: DC 12V

Weight without stand : 11.02 lbs. (5.0 kg)

Accessories Wireless remote control (×1), Remote control holder (×1), Batteries (×2),

AV-IN3 AV-IN3

AV-IN4 (TV main unit) AV-IN4, AV-IN4 (S-VIDEO)

Antenna F-Type

Headphone Mini-jack for stereo (ø3.5 mm)

TV main unit ~1

Wireless Center 2.43 lbs. (1.1 kg)

Model

LC-15L1U

2

with stand : 13.89 lbs. (6.3 kg)

Rechargeable battery (×1), AC adapters (×2), Wireless center (×1),
Wireless center stand (×1), Screws (×3), Cable clamps (×2), Table stand (×1),
Video controller (×1), Operation manual (×1), Antenna cables (×2),
Connecting System Chart of LC-15L1U (×1), Registration Card (×1),
Cautions Regarding Radio Wave Interference (×1), AC Cord (×2)

As a 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.

~1:Including Rechargeable battery

5

LC-15L1U-S

TV MAIN UNIT PART NAMES

CHARGE indicator

POWER indicator

Remote sensor windowTable stand (Detachable)

Left speaker

Right speaker

SLEEP indicator

TV main unit (Top view: Control section)

TV main unit (Front view)

CHVOL MENU TV/VIDEO MAIN POWER

-

+

VOL (–)/(+)

CH ( )/( )

MAIN POWER

TV/VIDEO

MENU

TV main unit (Rear view)

AUDIO

AV-I N4

VIDEO

S-VIDEO

HEAD

PHONE

FACTORY

SERVICE

L

R

CHCH

ENTER

PO

W

E

R

DISPLAY

SLEEP PIC. FLIP

MUTE

VOL

BRIGHTTV/VIDEO MENU

FLASH

BACK

MTS

POWER INPUT DC 15 V

HEADPHONE jack

S-VIDEO

VIDEO

AV-IN4

AUDIO(R)

AUDIO(L)

Remote control holder

The remote control can be placed in the

remote control holder when moving the TV.

1 Attach the remote control holder to the

handle with the arrow ( ) in the center of

the holder facing upward.

2 Place the remote control in the remote

control holder.

Table stand

release button

Handle

1

2

CHCH

ENTER

P

O

W

E

R

DISPLAY

SLEEP PIC. FLIP

MUTE

VOL

BRIGHTTV/VIDEOMENU

FLASH

BACK

MTS

Removing and Attaching the Table Stand

1

Lift the TV main unit straight up by holding the handle while depressing the

table stand release button.

2

Unfold the stand.

• Securely unfold the stand until you hear a clicking sound. Only use the

stand after first unfolding until a clicking sound is heard to ensure that it is

stable.

3

Fold up the stand.

• Return the stand to its original unfolded position.

4

Insert the TV main unit straight into the table stand.

• The TV main unit cannot be inserted if inclined on an angle. Inserting the

TV main unit with force can cause damage or a malfunction.

Stand

Handle

Table stand

release button

Table stand

OPERATION MANUAL

6

TV MAIN UNIT PART NAMES (Continued)

Removing the Back Cover

■ Before connecting cables and cords to the rear terminals, remove the back covers. Push

in the tabs and pull out the back covers carefully.

■ To mount the cover, insert the 2 hooks on the bottom of the cover into the cabinet and

press on the upper part of the back cover until the tab locks in place with a click.

Listening with Headphones

■Plug the headphone mini-plug into the HEADPHONE jack located on the rear of the TV set.

Note:

• Headphones are not included in the supplied accessories.

• No sound is heard from the TV main unit speakers when a headphone mini-plug is connected into the HEADPHONE jack.

▼ On-screen display

Adjust the sound volume

using VOL ( )/( ) on the

remote control.

Headphones

AUDIO

AV- IN 4

VIDEO

S-VIDEO

L

R

HEAD

PHONE

Rear terminal

20

VOLUME

–+

WIRELESS CENTER PART NAMES

SIGNAL LEVEL

MAIN

POWER

POWER

IN

OUT

AV-IN1AV-IN1AV-IN3

IR

OUT

POWER

INPUT

DC12V

FACTORY

SERVICE

S-VIDEO

MONITOR

OUT

MONITOR

OUT

VIDEO

AUDIO

L

AUDIO

R

AV-IN2

/OUT

ANT.

Transmission

SIGNAL LEVEL

indicator

(Reception gain)

· Green:

Communication

in progress

· Red:

Difficulty

in transmission

· Not lit:

Not communicating

POWER indicator

· Green:

Operation in

progress

(when power is on)

· Red: Standby

MAIN

POWER

button

Front

Antenna

input

terminal

Antenna

output

terminal

Rear

VIDEO

AUDIO (L)

AUDIO (R)

AV-IN1 (S-VIDEO)

MONITOR

OUT

MONITOR OUT

(S-VIDEO)

Factory

adjustment

terminal

POWER INPUT

DC 12V

Video controller

terminal

VIDEO

AUDIO (L)

AUDIO (R)

AV-IN1

VIDEO

AUDIO (L)

AUDIO (R)

AV-IN3

VIDEO

AUDIO (L)

AUDIO (R)

AV-IN2

/OUT

Wireless Center

TV main unit

Wireless Center

stand

Rubber foot

Rubber foot

POWER Indicator

When the TV is turned off with the remote control, the

Wireless Center is switched to standby (POWER indicator

is lit red). (There may be a time lag of about 5 to 6

seconds.)

Placing the Wireless Center Where You Want It

We recommend placing the Wireless Center in an area

where there are no obstructions to impede radio wave

transmission/reception.

(Do not place the Wireless Center in a box.)

Note:

• The distance for which transmission is possible between the

TV main unit and Wireless Center is about 15 meters.

However, this distance may vary depending on the location

or conditions under which the Wireless Center is used.

• If the TV main unit gets close to the Wireless Center, there

may be cases where noise appears on the screen. In this

case, keep the TV main unit away from the Wireless Center

until the noise decreases, or try to change the transmission

channel setting (page 28).

Setting up the Wireless Center

• The Wireless Center can be placed horizontally or upright.

• When placing horizontally:

The side on which the rubber feet are attached is the

bottom.

• When placing upright:

Fasten the stand to the bottom of the Wireless Center with

the screws provided.

* Failure to securely fasten the stand may cause the

Wireless Center to tip over during use.

LC-15L1U-S

7

LC-15L1U-S

REMOTE CONTROL

CHVOL

P

O

W

E

R

ENTER

DISPLAY

MUTE

SLEEP PIC. FLIP

BRIGHT TV/VIDEO MENU

FLASH-

BACK

1 POWER

Switch the Liquid Crystal Television power on or off.

2 DISPLAY

Display the channel and time information, and check

the amount of remaining battery power.

3 SLEEP

Set the sleep timer.

4 ENTER

Execute a command.

5 BRIGHT

Adjust the brightness of the screen.

6 MUTE

Mute the sound.

7 VOL (+)/(–)

Set the volume.

8 CH (

)/(

)

Select channel.

9 MTS

Select audio settings.

10 PIC. FLIP

Set the orientation of the picture.

11 ///(Cursor control)

Select a desired item on the screen.

12 TV/VIDEO

Select a Liquid Crystal Television input source.

13 MENU

Display the menu screen.

14 FLASHBACK

Return to the previous channel.

15 Channel Select

Set the channel.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

PREPARATION

Using the Remote Control

■ Use the remote control by pointing it toward the remote control sensor window

on the TV main unit. Objects between the remote control and sensor window

may prevent proper operation.

Cautions regarding use of the remote control

■ Do not expose the remote control to shock.

In addition, do not expose the remote control to liquid, and do not place it in an

area with high humidity.

■ Do not install or place the remote control under direct sunlight. The heat may

cause deformation of the unit.

■ The remote control may not work properly if the remote control sensor window

of the TV main unit is under direct sunlight or strong lighting. In such cases,

change the angle of the lighting or LCD TV set, or operate the remote control

closer to the remote control sensor window.

Batteries for the Remote Control

Before using the LCD TV set for the first time, install two (“AAA” size, UM/SUM-4) batteries (supplied). When the batter-

ies become depleted and the remote control fails to operate, replace the batteries with new (“AAA” size, UM/SUM-4)

batteries.

1

Open the battery cover.

■ Slide the cover while pressing the

( ) part.

2

Insert two (“AAA” size, UM/SUM-

4) batteries.

+

–

+

–

■ Position the positive and negative

ends of the batteries as indicated in

the compartment.

Caution!

Cautions regarding batteries

Improper use of batteries can result in chemical leakage and/or explosion. Be sure to follow the instructions below.

• Place batteries with their terminals corresponding to the (+) and (–) as indicated in the compartment.

• Different types of batteries have different characteristics. Do not mix batteries of different types.

• Do not mix old and new batteries. Mixing old and new batteries can shorten the life of new battery and/or cause the old

battery to leak chemicals.

• Remove batteries when they become weak.

Chemicals that leak from batteries can cause a rash. If chemical leakage is found, wipe with a cloth.

• The batteries supplied with the product may have a shorter life expectancy due to storage conditions.

• If the remote control will not be used for an extended period of time, remove the batteries from the remote control.

SLEEP indicator

CHARGE indicator

POWER indicator

Remote sensor window

CHARGE SLEEPPOWER

3

Close the battery cover.

■ Engage the claw on the cover into

the battery housing and slide shut.

8

/64

47

5

LC-15L1U-S

DIMENSIONS

Unit: inch (mm)

1929/64 (494)

(145.5)

3

221/64

(59)

13

(81)

/32

/32

11

17

(415)

(445)

16

17

/64

53

7

/32

7

(198.5)

(5.5)

111/32

(280)

/8

5

10

(269.5)

/64

315/16
(100)

R

E

W

PO

DISPLAY

SLEEP PIC. FLIP

ENTER

MUTE

BRIGHT TV/VIDEO MENU

FLASH
BACK

CHCH

VOL

/32

MTS

31

(50)

1
/32

31

(50)

1

863/64

(228)

53

3

/64

(97)

9

LC-15L1U-S

REMOVING OF MAJOR PARTS

Ë

TV section

1. Remove the four lock screws from the stand, and detach the table stand.

2. Detach the terminal cover.

3. Detach the battery cover.

4. Remove the lock screw from the terminal block.

5. Remove the three lock screws from the battery compartment.

6. Remove the twelve lock screws from the cabinet B, and detach the cabinet B.

7. Disconnect the connectors from the PWBs.

6

6

Terminal Cover

4

Cabinet A

SS(RX) PWB

DC Jack PWB

1

Stand

1

P4001

2

6

~

6

5

Cabinet B

6

3

Battery Cover

Table Stand(Detachable)

Note~: Be careful for a screw to
bind tight too much.

Operation PWB

Charger PWB

7

7

P9901

P3802

7

P4051

7

CN1

CN2

P2001

P3204

7

P2002
P3205

F3803

F3801

P3201

7

7

CN2

7

F3802

CN1

7

CN3

P2004

7

SC1202

CN3

7

7

P6504

P3202

P4051

7

SC1203

CN2
P9002

7

P4051

P3203

7

SC1204

P2003

P9001

P9003

Inverter PWB

CN1

Main PWB

Battery Connector PWB

7

7

R/C, LED PWB

10

LC-15L1U-S

9

10

11

13

13

12

12

8

Battery Connector PWB

Speaker (L)

Speaker (R)

Operation PWB

R/C, LED PWB

Angle

SS(RX) Antenna PWB

SS(RX) Antenna PWB

Top cover

DC Jack PWB

» Precautions in reassembling the SS unit

1. Do not touch by hand the antennas that are on the ANT PWBs to be coupled to the SS unit. Place these
PWBs in position with enough care to keep the antennas in the original shape.

(If by any chance the antenna gets bent or deformed, do not reshape it by hand, nor use the PWB again.

Otherwise communication failure may result.)

2. Insert the connectors of the ANT PWBs from just above tightly to their counterparts on the SS unit. (Do not
insert them slantwise.)

To disconnect the antenna connectors from the SS unit, hold and pull them out vertically. Do not hold the

cables to disconnect. (Otherwise the cables may get broken or the connectors damaged.)

3. Handling the SS unit RF cable

With the SS unit fit in position, dress and secure the RF cable, free of extra load, in its original route.

8. Remove the two lock screws from the operation panel (top cover), and detach the operation panel (top cover)
assembly.

9. Remove the two lock screws from the DC jack PWB and the lock screw from the angle. Detach the DC jack
PWB and the angle.

10. Remove the two lock screws from the R/C, LED PWB, and detach the R/C, LED PWB.

11. Remove the two lock screws from the battery connector PWB, and detach the battery connector PWB.

12. Remove the lock screws one each from the SS (RX) antenna PWBs, and detach the SS (RX) antenna PWBs.

13. Remove the lock screws two each from the speakers, and detach the speakers.

11

LC-15L1U-S

14. Remove the three lock screws from the inverter PWB, and detach the inverter PWB.

15. Remove the two lock screws from the charger PWB, and detach the charger PWB.

16. Remove the two lock screws from the SS (RX) PWB, and detach the SS (RX) PWB.

17. Remove the five lock screws from the main PWB, and detach the main PWB.

18. Remove the two lock screws from the chassis frame, and detach the chassis frame.

19. Remove the lock screw from the LCD panel unit, and detach the LCD panel unit.

17

Main PWB

SS(RX) PWB

17

Charger PWB

16

14

15

18

Inverter PWB

Chassis Frame

18

19

LCD Panel Unit

12

» Precautions in handling the LCD panel

21

25

23

24

26

22

Lamp Unit
(KLMP-A002WJZZ)

Reflection Sheet (Cover)
(PSHEP0307CEZZ)

Light Guide Plate
(PGiDM0070CEZZ)

Reflection Sheet-1
(PSHEP0284CEZZ)

Reflection Sheet-2
(PSHEP0285CEZZ)

Diffusion Sheet
(PSHEP0283CEZZ)

Prism Sheet
(PSHEA141WJZZ)

Reflection/Deflection Sheet
(PSHEP0281CEZZ)

Reflection Mirror

22

Reflection Mirror

Back Shield

20

20

LCD Panel Unit

1. Handle the panel in a clean room (at humidities of over 50%).

2. Be sure to wear a wrist band to handle the panel.

3. Be careful not to drop or vibrate the panel.

4. Use an ionizer (within 30 cm).

20. Remove the two lock screws from the LCD panel unit, and detach the LCD panel unit.

21. Detach the diffusion sheet, prism sheet and reflection/deflection sheet.

22. Detach the four reflectors (top, bottom, right and left).

23. Detach the two reflection sheets (covers).

24. Detach the light guide plate.

25. Detach the fluorescent lamp.

26. Detach the two reflection sheets.

LC-15L1U-S

13

LC-15L1U-S

Ë

Wireless center Section

1. Removing the top cabinet
1-1.Remove the four rubber legs from the bottom cabinet, and the four lock screws from the top cabinet.
1-2.Remove the three lock screws from the terminal block.
1-3.Undo the three arrow-marked hooks from the front panel. Slide the top cabinet backward and detach it.

Top Cabinet

1-2

1-3

1-3

1-3

1-3

Front Cabinet

2. Removing the front cabinet
2-1.Disconnect the cables from between the switch, LED PWB and

the wireless center PWB.

2-2.Remove the two lock screws from the front cabinet, undo the

three arrow-marked hooks, and detach the front cabinet.

2-3.Remove the two lock screws from the switch, LED PWB and

separate the switch, LED PWB from the front cabinet.

Bottom Cabinet

1-1

Rubber Leg

Wireless Center PWB

2-2

2-1

Switch, LED PWB

2-2

2-2

14

2-2

2-3

Front Cabinet

LC-15L1U-S

3-4

3-3

4

3-3

3-2

3-2

3-3

SS(RX) Antenna PWB

Tapes

SS(RX) Antenna PWB

SS(RX) PWB

Wire Holder

Wire

Holder

3-1

» Precautions in reassembling the SS unit

1. Do not touch by hand the antennas that are on the antenna PWBs to be coupled to the SS unit. Place these
PWBs in position with enough care to keep the antennas in the original shape.

(If by any chance the antenna gets bent or deformed, do not reshape it by hand, nor use the PWB again.

Otherwise communication failure may result.)

2. Insert the connectors of the antenna PWBs from just above tightly to their counterparts on the SS unit. (Do
not insert them slantwise.)

To disconnect the antenna connectors from the SS unit, hold and pull them out vertically. Do not hold the

cables to disconnect. (Otherwise the cables may get broken or the connectors damaged.)

3. Handling the SS unit RF cable

With the SS unit fit in position, dress and secure the RF cable, free of extra load, in its original route.

3. Removing the SS (TX) antenna PWBs
3-1.Peel off the tapes.
3-2.Disconnect the cables from between the SS (TX)

PWB and the wireless center PWB.

3-3.Remove the lock screws one each from the wire

holders.

3-4.Remove the lock screws one each from the SS (TX)

antenna PWBs, disconnect the cables from the SS
(TX) PWB, and detach the SS (TX) ANTENNA
PWBs.

4. Remove the four lock screws from the SS (TX) PWB,
and detach the SS (TX) PWB.

5. Remove the five lock screw from the wireless
center PWB, and separate the wireless center
PWB and the shield from the bottom cabinet.

Wireless Center PWB

Shield

5

Bottom Cabinet

15

LC-15L1U-S

ADJUSTING PROCEDURE OF EACH SECTION

The best adjustment is made before shipping. If any position deviation is found or after part replace is performed,
adjust as follows.

Preparations

Use the dedicated AC adaptor or a stable DC power supply as power source.
Adjust the unit and the wireless center in pairs.

Wireless center AC adaptor: UADP-A042WJPZ

DC power supply: 12 V, 1.5 A

TV Main Unit AC adaptor: UADP-A041WJPZ

DC power supply: 15 V, 4.0 A

1.Adjustment procedure

Finish process adjustment
Turn on the power → call the adjustment process mode (remote control) → the common bias and white balance
adjustments.
In final factory checking and adjusting, switch the SS radio RF channels A, B and C according to the processes
in order to be little affected by wave interference.

2.Calling the adjustment process mode (on the unit only)

• With either Ke y 4 (pin (81) of microprocessor) or Key 5 (pin (82) of microprocessor) being grounded, turn on the
power.

• For servicing, hold the TV/VIDEO and MENU keys at once, and turn on the power switch. (The inspection
process mode menu appears at the top left of the screen.) Press the CH DOWN and VOL DOWN keys at the
same time. (The adjustment process mode screen shows up.) To clear this mode, turn off the monitor's main
power. (Or turn off the power switch or use the remote controller.)

3.Key operation in the adjustment processes

Selecting the reception channels

• Using the CH UP/DOWN keys, turn up or down a reception channel.
Click: Channels are turned up and down one by one.
Continuous hold-down: Channels are turned up and down until the next receivable channel.

• Various adjustments
Make each adjustment using the MENU SELECT, CURSOR UP/DOWN, CH UP/DOWN and VOL UP/DOWN
keys (on the unit and the remote controller).

• Use the CURSOR UP/DOWN keys to select an adjustment item.

• Use the MENU SELECT key to get the adjustment items to toggle. (The next item comes up.)

Let's suppose that the bottom item is now picked up. When the MENU SELECT key is pressed, the top item on
the next page comes up.

• Use the VOL UP/DOWN keys to turn up or down the selected setting.
Hierarchical move
On page 4, press the ENTER key at any item than I2CDATA, and the setting page of the item will show up. To
quit the page, press the FLASH-BACK key.

4.Initialization

4-1. Keep both pins (81) and (82) of IC2001 (microprocessor) grounded, and turn on the power.
4-2. Select the mode number (A623&624). *Note: No selection is available for MODEL.
4-3. Select the size (15) in inches. *Note: INCH cannot be changed.

16

LC-15L1U-S

5.Adjustment

5-1. +B adjustment (monitor and wireless center)

1) Receive the standard color bar signal.

2)Adjust the +B-ADJ setting on page 2 of the monitor adjustment process to have the TP1101 voltage at

5.00±0.02 V.

3) Turn the wireless center's R5707 (semi-fixed variable resistor) to have the TL5403 voltage at 5.00±0.02 V.

Note: The 5.00 V reference is for all the supply voltages. Make the 5.00 V adjustment as accurately as possible.

5-2. Common bias adjustment

..........

Page 2 of the adjustment process

1) Adjust the "COM BIAS" setting on adjustment process page 2 so that the contrast goes to maximum (black most
accentuated). (For this adjustment, receive a B/W broadcast channel.)

5-3. White balance (cut-off and gain) adjustment

Vary the "RCUTOFF", "BCUTOFF", "RGAIN" and "BGAIN" settings on page 3 of the adjustment process.

1) Receive the black signal (white 40%).

Adjust the "RCUTOFF" and "BCUTOFF" settings on adjustment process page 3 to have the black color

temperature as specified.

Adjustment Process Page 3

RCUTOFF 0
GCUTOFF 0
BCUTOFF 0
R-GAIN 0
G-GAIN 0
B-GAIN 0

Red cut - off adjustment
Green cut - off adjustment
Blue cut - off adjustment
White balance
White balance
White balance

2) Receive the white 80% signal.
Adjust two of the "R-GAIN", "G-GAIN" and "B-GAIN" settings in the decreasing direction to have the white
color temperature as specified.
Note:Make sure at least one of the "R-GAIN", "G-GAIN" and "B-GAIN" settings is "0".

3) Check to see if the black and white color temperatures are as specified. If not, repeat the above steps 1) and

2).

17

LC-15L1U-S

6. Lamp error detection

6-1. Functional description

This LCD color television has a function (lamp error detection) to be turned OFF automatically for safety
when the lamp or lamp circuit is abnormal.
If the lamp or lamp circuit is abnormal, or some other errors happen, and the lamp error detection is executed,
the followings occur.
1 The main unit of television is turned OFF 5 seconds after it is turned ON. (The power LED on the front

side of TV turns from green to red.)

2 If the situation 1 happens 5 times sequentially, television can not be turned ON. (The power LED remains

red.)

6-2. Countermeasures
6-2-1.Check when turning OFF the lamp error detection

When television is turned OFF by the lamp error detection mentioned above, it enters the adjustment
process with the power LED red. Entering the adjustment process turns OFF the error detection and turns
ON TV.
This enables the operation check to detect errors in the lamp or lamp circuit.
Check whether "ERROR NO RESET" on line 3, page 1 of the adjustment process is 1 or more. If it is 1 or
more, it indicates the lamp error detection was executed.

6-2-2.Resetting of the lamp error count

After confirming that the lamp or lamp circuit is normal, reset the lamp error count. Select "ERROR NO
RESET" on line 3, page 1 of the adjustment process and set the number to 0 using the volume button.

Page 1 of the adjustment process

1

MODEL A623&624
INCH SIZE 15
ERROR NO RESET 5
PUBLIC MODE OFF
V-CHIP 1
CANADIAN OFF
WC V-CHIP 1
WC CANADIAN VCHIP OFF

ROM VER A623 1.02A A624 1.02A
SS VER TX 1B RX 1E
ID No ~~~~~~~~

Reset 0

18

No picture and no sound at all

(When using AC adapter)

Check that microcomputer adjustment process menu is set correctly.

No fluorescent lamp lighting

Is F3801 normal?

Replace F3801.

Is F3804 normal? Replace F3804.

YES

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

NO

Is loaded-side short-circuited

when F3801 is removed?

Are T3701 secondary

outputs +34V, +9V, +5V and

-11V normal?

Is oscillation waveform

normal at T3701 primary?

Check T3701 secondary

loading.

Check J9901 periphery and

connector cable.

Check S4050 and connector

cable.

Is pin (120) of IC1201 at "H"

level?

Replace and check

fluorescent lamp.

Is oscillation waveform

normal at primary of T6501,

T6502,

T6503 and T6504?

Check Q6501, Q6502,

Q6503, Q6504, Q6511,

Q6512, Q6513, Q6514,

T6501, T6502, T6503, T6504

and their peripheries.

Check relevant line, IC1201

and periphery.

Are Q3807 and Q3803

normal?

Are T3701 primary periphery,

Q3703, Q3705 and S4050

short-circuited?

TROUBLE SHOOTING TABLE

LC-15L1U-S

19

LC-15L1U-S

No picture and no sound at all

(When using battery)

Check that microcomputer adjustment process menu is set correctly.

Is F9001 normal?

Replace F9001.

YES

YES

YES

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

NO

NO

No power (Normal operation with AC adapter)

Is battery voltage (1.8-2.2V) present at pin (94) of IC2001?

Is temperature detection voltage (0.5-1.8V) present at pin (93) of IC2001?

Is battery detection of pin (68) of IC2001 at "L" level?

Are pins (2) and (4) of Q3806 at "L" level?

Check IC2011, F9001, battery and their peripheries.

Check IC2011, battery and their peripheries.

Check battery and their peripheries.

Check Q3801, Q3802 and their peripheries.

Check Q3806.

No operation with battery

Is loaded side short-

circuited when F9001

is removed?

Are T3701 secondary

outputs +34V, +9V,

+5V and -11V normal?

Is oscillation waveform

normal at T3701

primary?

Check T3701

secondary loading.

Check P9004

periphery and

connector cable.

Check S4050 and

connector cable.

Are Q3806 and Q3801

normal?

Are T3701 primary

periphery, Q3703,

Q3705 and S4050

short-circuited?

TROUBLE SHOOTING TABLE (Continued)

20

No picture (1/2)

No picture at all

No picture for TV

No picture for Video 1 No picture for Video 2

Check that microcomputer adjustment process menu is set correctly.

NO

NO

NO NO NO NO

NO

NO

NO

NO

NO

NO

YES YES

YES

YES YES

No picture for Video 3

NO

NO

NO

YES

YES

YES

YES

YES

No color

No color for TV

No color for Video 2 No color for Video 3No color for Video 1 No color for Video 4

Check that microcomputer adjustment process menu is set correctly.

NO

No picture for TV, Video

1, Video 2 and Video 3

No picture

for Video 4

Is IC801

I/O

normal?

Is IC1201

I/O

normal?

Check LCD panel

voltage and waveform.

Check

IC801 and

periphery.

Is IC5402

I/O

normal?

Is input at

pin (73) of

IC5401

normal?

Check

IC5402 and

periphery.

Check

power line.

Check

relevant

line.

Check

relevant

line.

Is input at

pin (9) of

IC5402

normal?

Check

relevant

line.

Is input at

pin (7) of

IC5402

normal?

Are inputs

at pins (72)

and (73) of

IC801

normal?

Check SY

line, SC line

and

peripheries.

Check

IC5402 and

periphery.

Is IC5402

output

normal?

Check

IC5402 and

periphery.

Is IC5402

output

normal?

Check

IC5402 and

periphery.

Is IC5402

output

normal?

Check

tuner and

periphery.

Is input at

pin (14) of

IC5402

normal?

Check

relevant

line.

Check

IC5402 and

periphery.

Are voltages

at pins (6),

(7) and (9) of

tuner

normal?

Is output at

pin (19) of

tuner normal?

Is IC5402

output

normal?

Check

relevant line.

Is input at

pin (16) of

IC5402

normal?

Check

relevant

line.

Check

IC1201 and

periphery.

Is IC801 input normal?

Check IC801 and periphery.

TROUBLE SHOOTING TABLE (Continued)

LC-15L1U-S

21

LC-15L1U-S

No sound

No sound from both speakers

No sound from headphone?

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

NO

NO

NO

Check X3201 periphery.

Check IC3201 periphery.

No sound in all input modes (TV and Video

1/2/3/4)?

Check the following.

1 Is the volume not low?

2 Is the set not muted?

3 Is headphone not inserted?

Is voltage normal at pin (7) (power input terminal)

of IC3206? (Approx. +15V)

Is voltage normal at pin (5) (standby control

terminal) of IC3206? (Approx. +1.8V)

Is control signal input available at each pin of IC3201?

Pin (2) of IC3201 SCL1

Pin (3) of IC3201 SDA1

Is oscillation waveform normal at pins (71) and (72) of

IC3201?

Is audio signal output available at pins (27) (Rch) and

(28) (Lch) of IC3201?

Check pins (27) (Rch) and (28) (Lch) of IC3201 up to

pins (4) (Rch) and (2) (Lch) of IC3206, as well as the

peripheries of IC3204, IC3205 and IC3207.

Is power voltage normal in each circuit?

Pin (8) of IC3204, IC3205 and IC3207, and pin

(39) of IC3201 Approx. +8V

Pins (11), (12), (13), (65) and (66) of IC3201

Approx. +5V

Check again after doing the following.

1 Raise the volume.

2 Cancel the mute.

3 Remove the headphone.

Check headphone jack, speaker and

speaker cable.

Check AC adapter up to pin (7) of IC3206.

Check pin (56) of IC2001 up to pin (5) of

IC3206.

Check pins (29) and (30) of IC2001 up to

pins (2) and (3) of IC 3201.

Check the following.

+8V line....Check Q3713 periphery up to

pin (8) of IC3204, IC3205 and

IC3207, and pin (39) of

IC3201.

+5V line....Check T3701 output

B5V500MA line up to each

+5V input pin of IC3201.

Check the following.

1 No TV sound....Check the peripheries

of Q5204, Q5205 and TU5201.

2 No Video 1 sound....Check pins (2)

and (3) of J5201 up to pins (57) and

(56) of IC5901.

3 No Video 2 sound....Check pins (6)

and (7) of J5201 up to pins (54)

and(53) of IC5901.

4 No Video 3 sound....Check pins (10)

ans (11) ofJ5201 up to pins (51) and

(50) of IC5901.

5 No Video 4 sound....Check J3201 up

to pins (54) and (53) of IC3201.

Check that microcomputer adjustment process menu is set correctly.

NO

No Sound from

MONITOR OUT

Check pins (2) and (3) of J5201 up to pins (2) and

(3) of J5202, as well as the perripheries of IC5201.

Are outputs at pins

(36) and (37) of

IC5901 normal?

Check IC5901 and

its periphery.

Check pins (36) and

(37) of IC5901 up to

pins (6) and (7) of

J5201.

No Sound from AV

OUT

TROUBLE SHOOTING TABLE (Continued)

22

LC-15L1U-S

Example of Teraterm screen (Wireless Center side

)

L1 PAL TX Version 2C
MPEG Version 05
Before MPEG CMD
MPEG CMD OK
Before MPEG Standby Cmd
MPEG Standby Cmd OK

Debug Monitor Special Version 1.1
Copyright 2001 SHARP CORPORATION.
All Rights Reserved.
$ ~~~~~~~~
Syntax Error
ERROR
$ eepw 0x80 0x03
OK
$

1.Checking normal startup with terminal software

After entering the command described below, turn on the power again. If the same contents as shown on the
next page appear on the screen, you can confirm that "SS unit" has been started up normally.

1. Preparations:

1 PC (with Teraterm communication software installed)
2 Dedicated connector cable

(Connection diagram)

PC
(with Teraterm
installed)

Caution:

After starting Teraterm, set to "Serial"
port on initial screen.

(Checkup procedure)

Serial port

Dedicated connector cable
(QCNW-1914TAZZ)

φ2.5 Jack

Wireless Center or
TV receiver

"Factory service terminal" on the
rear face

1 When you are done with the connection as shown above, turn on the power.
2 Sev eral seconds after powering up, the screen will stabiliz e. Then, hold down Shift k ey and ~ ke y simultaneously

for a few seconds to call the prompt.
~ Wireless Center prompt = "$"

TV receiver prompt = "%"
When the sequence ~~~.. appears, press Enter key once to

show a single prompt.

3 Enter the following command, and press Enter.

"eepw_0x80_0x03" (_ indicates a space.)

4 Turn the power off and then on again.
5 When you have finished checking all display items on the next

page, repeat the steps starting from 1. In the step 3, enter
"0xFF" instead of "0x03" to put the setting back to a default.

23

LC-15L1U-S

2.Terminal software (Teraterm) checkup screen

» Wireless Center (sender) side normal screen
Linking example at A-ch

L1 US TX Version 1B Power turned on (microcomputer started)
POWER OK
SHARP L1 Transmitter mode with AUDIO

VENUS Task startup
L1 US TX Version 1B Second version display
Before MPEG FORWARD
MPEG FORWARD End
MPEG Audio FORWARD End
MPEG Audio FORWARD Finish End
MPEG Version 08
Before MPEG CMD
MPEG CMD OK
Before MPEG Standby Cmd

Standby Cmd adr 0x01 = 00
MPEG Standby Cmd OK MPEG setup complete
Cmd OK
Config Mode OK
Cmd OK
Standby Stop Cmd
Standby Stop OK
MPEG Start Cmd OK

APOLLO2 startup
Root mode
RSB=17, Retry=3
Set Cycle OK
RSB=17, Retry=3
Set Cycle OK
SS Channel = 00[ch]
APOLLO2 startup ok
SS Default Channel = 0x00[ch]
Scramble ID = 0x010f2046
WakeUp With Auto Ch
Root(Tx) : Link(WakeUp) Process Start !! All settings initialized

Searching.....

SSCCA count = 0
SSCCA count = 88
SSCCA count = 0
SSCCA count = 0

Link (WakeUp) Packet Received.
Root (Tx) :Link Process Done.

Channel = 0x01 O.K.

24

» TV unit (receiver) side normal screen
Linking example at A-ch

LC-15L1U-S

L1 US RX Version 1E Power turned on
POWER OK
SHARP L1 Receiver mode with AUDIO

VENUS Task startupSet Mode Register 0 = 0x70
Video Parameter OK
L1 US RX Version 1E Second version display
MPEG Audio FORWARD End
MPEG Audio FORWARD Finish End
MPEG Version 27 MPEG setup complete

.....Register Dump.....

ADD +0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F
00 00 00 00 00 83 83 83 83 11 11 11 11 10 10 10 10
10 01 01 01 01 00 00 00 00 00 00 00 00 00 00 00 00
20 01 01 01 01 11 11 1111 01 11 01 01 00 00 00 00
30 00 00 00 00 00 00 00 00 a0 a0 a0 a0 00 00 00 00
40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
50 03 03 03 03 c0 c0 c0 c0 00 00 00 00 00 00 00 00
60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70 00 00 00 00 00 00 00 00 00 00 00 00 27 27 27 27
80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
90 00 00 00 00 0a 0a 0a 0a 81 81 81 81 00 00 00 00
a0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
b0 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
c0 00 00 00 00 01 01 01 01 df df df df 00 00 00 00
d0 00 00 00 00 0f 0f 0f 0f 00 00 00 00 04 04 04 04
e0 07 07 07 07 00 00 00 00 00 00 00 00 01 01 01 01
f0 44 44 44 44 ff ff ff ff 00 00 00 00 00 00 00 00
System Instruction OKAPOLLO2 startup
Leaf mode
RSB=17, Retry=3
Set Cycle OK
RSB=17, Retry=3
Set Cycle OK
SS Channel = 01[ch]
APOLLO2 startup ok
SS Default Channel = 0x01[ch]
Scramble ID = 0x010f2046
Start Link Process. Wait a moment...

WakeUp With Def Ch1
Leaf(Rx) : Link Process Start !! All settings initialized

1 Ch CB Waiting.....

RSB=17, Retry=3
Set Cycle OK
CB Leaf (Rx) : Link Process Done.
Channel = 0x01 O.K.
Rate chg pak OK
Before Rate chg Routin
Change Mpeg Rate OK

(microcomputer started)

25

LC-15L1U-S

NO

YES

No sound

No picture

Teraterm screen (TX)

L1 PAL TX Version 2C

MPEG Version 05

Before MPEG CMD

MPEG CMD OK

Before MPEG Standby Cmd

MPEG Standby Cmd OK

Debug Monitor Special Version 1.1

Copyright 2001 SHARP CORPORATION.

All Rights Reserved.

$ —————

Syntax Error

ERROR

$ idr ←ID verified

00C00001

ok

$ idw 00C00002

←ID changed

ok

$

No link?

• TV receiver side screen shows "signal could not be received".

• Wireless Center side reception sensitivity lamp is off.

Determine which is faulty, Wireless Center

(sender) or TV receiver.

Remote controller

does not work.

Replace either one with a good module, and check if operation is

normal. (* To do this, you need to match both IDs. See below.)

Go to fault-finding flowchart

with normal link.

Determine which is faulty, Wireless Center

(sender) or TV receiver.

Replace either one with a good module, and check if link is

normal. (* To do this, you need to match both IDs. See below.)

Go to fault-finding

flowchart with no link.

* How to check and change the ID

A Checking

Using the terminal software, follow the check procedure

3

(page 39). Key in the command below, press Enter, and the ID

can be checked.

"idr"

B Changing

1 Key in the command below in the same procedure as above,

and press Enter.

"idw._********"

Key in the ID number of the newly installed good module.

Check the ID in step

A above.

2 Turn off the power and the

keyed-in ID will be written. Now

turn on the power again, and do the link or check the

performance.

3.Troubleshooting

» 1st step fault-finding flowchart for SS (wireless) module

26

LC-15L1U-S

YES

NO

NO

NO

YES

NO

NO

NO

NO

NO

NO

IC5704 failure

YES

No sound No picture

YES

YES

YES

YES

YES

YES

Is audio input signal supplied correctly

to pins (27) and (29) of CN5001?

Pin (27)→ L, Pin (29)→ R

Is DC voltage normal at each of the

following pins?

Pin (8) of IC6501

→ +5.0V

Pins (1), (2), (14) and (24) of

IC6500→ +3.3V

Is output signal waveform at pins (3)

and (6) of IC6500 similar to

the above input signal waveform?

Pin (3)→ R, Pin (6)→ L

Is pin (7) of IC6500 at HI (+3.3V)

level?

Is signal waveform normal at pin (12)

of IC6500?

Is control signal normal at each of pins

(9), (10) and (11) of IC6500?

Check for connector

damage or cable

disconnection.

Is video input signal supplied correctly to

each of the following pins?

Check for connector

damage or cable

disconnection.

Check for connector

damage or cable

disconnection.

Check the continuity

between pin (24) of

IC5704 and pin (24)

of CN5001.

Remote controller does not work.

* Pictures and sounds are produced.

Is there an output of data signal

waveform at pin (24) of CN5001?

Is there an output of data signal

waveform at pin (24) of IC5704?

Perform the following checks by

actually operating the remote

controller for a video source.

IC6000 failure

(Not serviceable)

Check each IC and

the peripheries of

L6500 and L6501.

Check IC6501

periphery.

IC5704 failure

IC6500 failure

IC6000 failure

(Not serviceable)

IC6000 failure

(Not serviceable)

» Wireless Center side fault-finding flowchart with normal link
~Perform the following checks while maintaining the link and feeding AV input signals to Wireless Center.

Reference waveform: VIDEO → Color bar

AUDIO → 1KHz SIN wave

27

LC-15L1U-S

YES

NO

YES

YES

YES

YES

NO

YES

YES

NO

NO

NO

NO

YES

NO

NO

NO

YES

NO

NO

YES

IC1100 failure

NO

NO

YES

No sound

YES

YES

IC704 failure

IC1500 failure

NO

YES

NO

YES

YES

YES

No picture

NO

NO

NO

YES

Is DC voltage normal at each of the

following pins?

Pin (8) of IC1501

→ +8.0V

Pins (1), (2), (14) and (24) of

IC1500→ +3.3V

Is output signal waveform at pins

(19) and (20) of IC1500 similar to

that of the input signal supplied to

Smart Link transmitter?

Pin (19)→ L, Pin (20)→ R

Are pins (7) and (8) of IC1500 at HI

(+3.3V) level?

Is control signal normal at each of

pins (9), (10) and (11) of IC1500?

Is signal waveform normal at pin

(15) of IC1500?

Check each IC

and the

peripheries of

L1500 and

L1501.

Check IC1501

periphery.

Check for

connector

damage or cable

disconnection.

Is output signal waveform available at

pins (1), (3) and (5) of CN1?

Is output signal waveform available at

pins (26), (27) and (31) of IC1100?

Is normal +5.0V available at pin (5) of

IC1300 and pin (8) of IC1302?

Are the waveforms normal at pins (2), (5)

and (6) of IC1302?

Does TP_PWM show normal waveform?

IC1501 failure

Check the

peripheries of

L1101-L1109.

IC1000 failure

(Not serviceable)

Check for connector

damage or cable

disconnection.

IC704 failure

Q701 failure

IC1000 failure

(Not serviceable)

Check the periphery

of each IC.

Check the

peripheries of

IC1302 and XC1301.

Are the waveforms of clock signal

at pin (44) and data signal at pin

(41) of IC1100 normal?

Remote controller does not work.

* Pictures and sounds are

produced.

Perform the following checks by

actually operating the remote

controller for a video source.

Is there an output of data signal

waveform at pin (12) of CN1?

Is there an output of data signal

waveform at pin (19) of IC704?

Is normal +8.0V

available at pins

(3) and (5) of

IC1501?

Check for

connector

damage or

cable

Q1501 and

Q1502 failure

IC704 failure

Q1500 failure

Is output signal

waveform at pins (1)

and (7) of IC1501

similar to the waveform

mentioned on the left?

Pin (1)→ R, Pin (7)→ L

Is output signal

mentioned above

available at pins (7) and

(9) of CN2?

Pin (7)→ R, Pin (9)→ L

Are base terminals of

Q1501 and Q1502 at

LOW (0V) level?

Is base terminal of

Q1500 at HI (+3.3V)

level?

IC1000 failure

(Not serviceable)

IC1000 failure

(Not serviceable)

» TV receiver side fault-finding flowchart with normal link
~Perform the following checks while maintaining the link and feeding the signals to Wireless Center.

Reference waveform: VIDEO → Color bar

AUDIO → 1KHz SIN wave

28

» Wireless Center (TX) side fault-finding flowchart with no link

NO

NO

NO

NO

NG

NO

NO

NO

NO

NO

Go to the

step A.9.

OK

YES

NO

Replace

the cable.

YES

YES

OK

YES

OK

YES

Check the microprocessor operation using terminal software.

A. No display

YES

No link

YES

YES

OK

YES

OK

2 Is normal +3.3V output available

at pin (4) of IC5906?

C. MPEG setup OK is not

displayed.

1 Is normal +1.5V available at

both ends of L6000, and

+3.3V at both ends of L6001?

D. No display after APOLL2

startup

1 Check IC6701 periphery.

3 Go to the step E.

2.

E. All displays are normal.

3 Replacement of UNT6700

did not help recover normal

operation.

4 Check the peripheries of

pins (40)-(43) of IC5704.

5 Check CN5200 peripheries.

1 Using a spectrum analyzer

or the like, check that output

signal has RF waveform.

2 Check that the cable

connecting CN5200 and

UNT6700 has no

interference or damage.

2 Is normal +3.3V available at

each of the following pins of

IC6701?

(1), (8), (18), (31), (37), (44),

(54), (67), (73), (80), (90), (103),

(109), (116), (126), (133) and

(139)

3 Is output signal waveform normal

at pin (13) of IC5704?

4 Is normal +3.3V output available

at pin (4) of IC5706?

6 Check IC5704 and Q5705

peripheries.

7 Check IC5902 periphery.

8 Is normal +1.5V available at

X5902?

9 Is normal +3.3V available at

X5900?

0 Is normal +5.0V output available

at pin (4) of IC5907?

q Check IC6500 periphery.

IC5704 failure

1 Is normal +9V available at pins

(1)-(3) of CN5002?

Check for connector

damage or cable

disconnection.

Check IC5906

periphery.

Check L6000

and L6001.

Not serviceable

Check FL5701

periphery.

Check IC5706

periphery.

Check Q5904

periphery.

Check Q5902

periphery.

Check IC6501 and

Q5903 peripheries.

LC-15L1U-S

29

LC-15L1U-S

Not serviceable

IC1704 failure

OK

OK

OK

A. No display

YES

YES

YES

YES

NO

NO

NO

NO

NO

YES

NO

NO

NO

NO

NO

NO

YES

YES

YES

YES

YES

YES

OK

No link

Check the microprocessor operation using terminal software.

OK

NG

OK

1Is normal +9V available at pins

(1)-(3) of CN2?

B. No second time Version display

C. MPEG setup OK is not

displayed.

D. No display after APOLL2

startup

E. All displays are normal.

1 Using a spectrum analyzer

or the like, check that output

signal has RF waveform.

2 Check that the cable

connecting CN200 and

UNT1700 has no

interference or damage.

3 Replacement of UNT1700

did not help recover normal

operation?.

4 Check pins (40)-(43) of

IC704 and the peripheries.

5 Check CN200 and the

peripheries.

2

Is normal +3.3V available at each

of the following pins of IC1701?

(1), (8), (18), (31), (37), (44),

(54), (67), (73), (80), (90), (103),

(109), (116), (126), (133) and

(139)

1

Check IC1701 and the periphery.

3

Go to the step E.

2

.

1 Is normal +1.5V available at

both ends of L1000, and

+3.3V at both ends of L1001?

3 Is signal waveform normal at pin

(44) of IC1100?

1 Check IC1100 and the periphery.

4 Check the following connections.

Between pin (23) of IC1100 and

pin (21) of IC704

Between pin (24) of IC1100 and

pin (23) of IC704

2 Is output normal at the following

pins of IC1100?

(1), (11), (20), (28) and (30): +3.3V

2 Is normal +3.3V output

available at pin (4) of IC906?

3 Is output signal waveform

normal at pin (13) of IC704?

4 Is normal +3.3V output

available at pin (4) of IC706?

6 Check IC704, Q705 and their

peripheries.

7 Check IC902 and the periphery.

8 Is normal +1.5V available at

X902?

9 Is normal +3.3V available at

X900?

0 Is normal +5.0V output

available at pin (4) of IC907?

q Check IC1500 periphery.

Check for

connector

damage or cable

disconnection.

Check IC906

periphery.

Go to the step

A.9.

Go to the step

A.8.

Check L1000

and L1001.

Go to the

step A.9.

Replace the

cable.

Check FL701

periphery.

Check IC706

periphery.

Check Q904

periphery.

Check Q902

periphery.

Check IC1501

and Q903

peripheries. Go

to the step B.1.

» TV receiver (RX) side fault-finding flowchart with no link

30