SHARP LC22SV2U Service Manual

LC-22SV2U

SERVICE MANUAL

S02R8LC22SV2U

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 ................................................................................ 13

» TROUBLE SHOOTING TABLE ............................................................................................................. 23

» CHASSIS LAYOUT ................................................................................................................................ 28

» BLOCK DIAGRAM................................................................................................................................. 30

» OVERALL WIRING DIAGRAM .............................................................................................................. 32

» DESCRIPTION OF SCHEMATIC DIAGRAM ........................................................................................ 34

» SCHEMATIC DIAGRAM ........................................................................................................................ 35

» PRINTED WIRING BOARD ASSEMBLIES........................................................................................... 56

» REPLACEMENT PARTS LIST .............................................................................................................. 66

» PACKING OF THE SET......................................................................................................................... 81

LC-22SV2U

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-22SV2U

2

2

IMPORTANT SERVICE SAFETY PRECAUTION

Ë

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

WARNING

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

2. Disconnect AC power before servicing.

CAUTION: FOR CONTINUED
PROTECTION AGAINST A RISK OF
FIRE REPLACE ONL Y WITH SAME
TYPE F3701 (T1.6AL, 250V), F3702
(T1.6AL, 250V), F6551 (T1.25A,

A V

250V), F6552 (T1.25AL, 250V),
F6553 (T1.25AL, 250V) AND F6554
(T1.25AL, 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 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 50k 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 resisor.

• 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
milliamp. 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

50k ohm

10W

0.15 µF

TEST PROBE

TO EXPOSED
METAL PARTS

CONNECT TO
KNOWN EARTH
GROUND

234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121

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, wattage, 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 by “ å”

234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121

2

Replacement Parts Lists

.

and

LC-22SV2U

2

2

2

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

conduite électrique ou une prise de terre branchée à la
terre.

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

2. Débrancher le récepteur avant toute réparation.

• 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

A V

PRECAUTION: POUR LA

PROTECTION CONTINUE CONTRE
LES RISQUES D'INCENDIE,
REMPLACER LE FUSIBLE PAR UN
FUSIBLE DE MEME TYPE F3701
(T1.6AL, 250V), F3702 (T1.6AL,
250V), F6551 (T1.25AL, 250V), F6552
(T1.25AL, 250V), F655 3 (T1.25AL,
250V) AND F6554 (T1.25AL, 250V).

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.
T outes 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.

VERIFICA TIONS CONTRE L'INCEN-DIE ET
LE CHOC ELECTRIQUE

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

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 les
boutons de commande non-métalliques, les isolants,
le dos du coffret, les couvercles ou blindages de réglage

VTVM

ECHELLE CA

50k ohm

10W

et de compartiment, les réseaux de résistance­capacité, 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

0.15 µF

SONDE D'ESSAI

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 50 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

234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121

234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121

AUX PIECES
METALLIQUES
EXPOSEES

BRANCHER A UNE
TERRE CONNUE

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

234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121

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-22SV2U

Precautions for using lead-free solder

1 Employing lead-free solder

"Inverter PWB" 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 40ºC, we recommend
you to use a dedicated soldering bit, if you are not familiar with how to obtain lead-free wire solder or soldening
bit, contact our service station or service ranch 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 wettabillty, 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 excoeded, remove the bit from the PWB as soon as you conurm the steady soldering
condition.
Lead-free solder contains more tin, and the end of the soldering bit may be easily corroded. Make sure to tum 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.

Becareful 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-22SV2U

Items LC-22SV2U

LCD panel 22” Advanced Super View & BLACK TFT LCD
Number of dots 1,229,760 dots WVGA
Video color systems N358, N443, PAL, PAL-M, PAL-N, SECAM, PAL-60

Destination USA/Latin America/Taiwan
TV Standard (CCIR) NTSC/PAL-M/PAL-N

TV function TV Tuning System PLL 181 ch.

STEREO MTS+SAP

CATV 125 ch.
3 Dimensional Y/C separation circuit Yes (N358 only)
Digital comb filter Yes
Brightness 430 cd/m
Lamp life 60,000 hours
Viewing angles H: 170° V: 170°
Audio amplifier 2.5 W 2
Speakers ø2 in. (5 cm), 2 pcs.

AV-IN1 AV-IN1, S-VIDEO-IN

AV-IN2 AV-IN2/AV-OUT
Terminals COMPONENT COMPONENT-IN, AUDIO-IN

Antenna F-Type

Headphone Mini-jack for stereo (ø 3.5 mm)
OSD language English/French/Spanish
Power supply DC 13 V, AC 110–240 V, 50/60 Hz
Power consumption 62 W (0.8 W Standby): AC 120 V (with AC adapter)

Weight 20.5 lbs. (9.3 kg), w/o accessories
Accessories Remote control, Batteries (x2), Antenna cable, AC

Model

2

55W: DC 13 V

adapter, AC cord, Cable clamps (x2), Operation Manual

Specifications are subject to change without prior notice.

5

LC-22SV2U

• TV/VIDEO CH (

)/( ) VOL (–)/(+) MENU

DISPLAY AND CONTROL OVERVIEW

CHVOL

MENU

TV/VIDEO MAIN POWER

MAIN POWER

TV/VIDEO

MENU

CH (

)/( )

VOL (–)/(+)

Speaker

SLEEP indicator

Upper control panel

Remote control sensor

OPC indicator

Speaker

OPC sensor

POWER indicator

Controls

AV

-

I

N

1

L

R

A

U

D

I

O

S

-

V

I

D

E

O

A

NT

.
V

ID

E

O

P

O

WE

R

I

N

P

UT

D

C

1

3

V

Y

P

B

CO

M

PO

NE

NT

P

R

L

L

R

A

V

-

I

N

2

/

O

U

T

V

I

D

E

O

A

U

D

I

O

R

A

U

D

I

O

H

E

A

D

P

H

O

N

E

AN

T

.

V

IDE

O

S-V

IDEO

AU

D

IO

L

R

P

O

W

E

R

INP

U

T

D

C

13

V

A

V

-IN1

VID

E

O

A

U

D

I

O

H

E

A

D

P

H

O

N

E

L

Y

P

B

P

R

R

A

U

D

I

O

L

R

C

O

M

P

ON

E

N

T

AV

-

I

N

2

/

O

U

T

Antenna terminal

(ANT.)

AUDIO (L)

AUDIO (R)

HEADPHONE

POWER INPUT

(DC 13V)

AUDIO (L)

AUDIO (R)

VIDEO

Y

P

R

P

B

AV-IN2/OUT

COMPONENT

AUDIO (L)

AUDIO (R)

VIDEO

S-VIDEO

AV-IN1

Carrying handle

● Adjusting the screen view angle

Terminals

Hold the carrying handle and tilt the

screen while steadying the stand with

your other hand.

You can adjust the screen vertically up

to 5 degrees forward or 10 degrees

backward, or rotate 25 degrees

horizontally.

The SLEEP indicator lights up red when the

SLEEP TIMER is set.

The Optical Picture Control indicator lights up

green when the BRIGHTNESS is set to

AUTO.

A green indicator lights when the power is on

and a red indicator lights when in the standby

mode (the indicator will not light when the

main power is off).

, , , and on the main unit have the same functions as the same buttons

on the remote control. Basically, this operation manual provides a description based on operation with the remote

control.

To change the vertical

angle of the LCD TV set,

tilt the screen up to 5

degrees forward or 10

degrees backward. The

TV set can also be

rotated 25 degrees

horizontally. Adjust the

angle so that the TV set

can be watched most

comfortably.

OPERATION MANUAL

6

Listening with Headphones

DISPLAY AND CONTROL OVERVIEW (Continued)

■

■

Removing the Back Cover

■

Headphones

▼ On-screen display

20

VOLUME

Rear terminal

Y

P

B

C

O

M

P

O

N

E

N

T

P

R

L

L

R

A

V

-

I

N

2

/

O

U

T

V

ID

E

O

AU

D

I

O

R
A

UDI

O

H

E

A

D

P

H

O

N

E

A

V

-

I

N

1

L

R

A

U

D

I

O

S

-

V

I

D

E

O

A

N

T

.
V

I

D

E

O

P

O

W

E

R

I

N

P

U

T

D

C

1

3

V

Y

P

B

C

O

M

P

O

N

E

N

T

P

R

L

L

R

A

V

-

I

N

2

/

OU

T

V

I

D

E

O

A

U

D

I

O

R

A

U

D

I

O

H

EA

D

PH

O

N

E

CHVOL

P

OW

E

R

MENU

VIEW MODE

MUTE

SLEEP PIC. FLIP

BRIGHT DISPLAY TV/VIDEO

FLASHBACK

REMOTE CONTROL

MENU/

'

/

"

/

\

/

|

(Cursor control)

TV/VIDEO

POWER

VIEW MODE

SLEEP

BRIGHT

VOL(+)/(–)

MTS*

3

(p. 17)

PIC. FLIP

FLASHBACK*

2

CH (

)/(

)

Channel Select

DISPLAY*

1

MUTE

*

1

Displays the receiving chan-

nel for 10 seconds.

*

2

Returns to the previous

channel.

*

3

Selects audio settings.

Before connecting cables and cords into 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.

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

Adjust the sound volume

using VOL (

)/( ).

Headphones are not included in the supplied accessories.

No sound is heard from the main unit speakers when a headphone mini-plug is connected into the

HEADPHONE jack.

LC-22SV2U

7

LC-22SV2U

CONNECTING EXTERNAL DEVICES

To COMPONENT terminal

A

V

-

I

N

1

L

R

A

U

D

I

O

S

-

V

I

D

E

O

A

N

T

.

V

I

D

E

O

P

O

WE

R

I

N

P

U

T

D

C

1

3

V

Y

P

B

COM

P

ON

E

N

T

P

R

L

L

R

A

V

-

IN

2

/O

U

T

V

I

D

EO

A

U

D

I

O

R

A

U

D

I

O

H

E

A

D

P

H

O

N

E

Example of external devices that can be connected

To AV-IN2 terminal

To AV-IN1 terminal

M

ENU

SLEEP T I

M

ER

VIDEO ADJUST

PRESE T

CLOSED CAPT ION

V–CHI P BLOCK

SET UP

SELECT

ENTER

EXI T

MENU

SLEEP T I

M

ER

SELECT

ADJU ST

EXI T

MENU

RETURN

SLEEP T I

M

ER [–– – RE

M

AIN]

PICTURE [ 30]

TINT

COLOR

BLACK LEVEL

SHARPNESS

SELECT

ENTER

EXI T

MENU

VI DEO ADJUST(TV)

RETURN

[ 0]

[ 0]

[ 0]

[ 0]

BRI GHTNESS [BR IGHT ]

AUTO PO

W

ER OFF

PIC. FLIP

AV2 IN/OUT

SELECT

EXI T

MENU

RETURN

[OFF ]

[NOR

M

AL ]

[IN ]

PRESE T

ADJU ST

MODE

[OF F ]

DATA

[CH 1 ]

SELECT

EXI T

MENU

RETURN

ADJU ST

CLOSED CAPT ION

INP UT SECRE T NO.

––––

EXI T

MENU

BLUE SCREEN [ OFF]

LANGUAGE

SELECT

EXI T

MENU

RETURN

ADJU ST

SET UP

CH–SE TTING

COLOR SYST EM

RESET

[ N358]

SELECTING MENU ITEMS

1

Press MENU to display the MENU

screen.

2

Press

'

/

"

to select the desired

menu item.

3

Press

\

/

|

to enter.

4

Press MENU to exit.

Selecting Menu Items

CHVOL

P

O

W

E

R

MENU

VIEW MODE

MUTE

SLEEP PIC. FLIP

BRIGHT DISPLAYTV/VIDEO

FLASHBACK

MENU/

'

/

"

/

\

/

|

This LCD TV set allows you to adjust the various settings using the menu screen. Select the desired

menu item by following the steps below and then refer to the indicated page for details.

The TINT display only appears when

the color system is set to N358 or

N443.

The displayed items differ depending

on the setting conditions.

The selected item changes to yellow.

Items in magenta cannot be se-

lected.

This product is factory set to comply

with the color system in the United

States (NTSC-N358). For Brazil

(PAL-M), Argentina (PAL-N) and

Uruguay (PAL-N), set the color

system before using this product.

To return to the previous screen,

select RETURN.

You can adjust some settings with

the special buttons: VIEW MODE,

SLEEP, BRIGHT and PIC. FLIP

* The characters in the above diagram are made to look larger for easy reading.

PC connection is not possible.

For the cable, use a commercially available audio/video cable.

Only connect audio/video signals to AV-IN1 and 2 terminals. Connecting other signals may result in a malfunction.

AV-IN1 has 2 video input terminals: VIDEO and S-VIDEO. When you connect external devices to both terminals

(and if you select AV-IN1), you can only view pictures from the S-VIDEO terminal. To view the picture from the

VIDEO terminal, do not connect any external device to the S-VIDEO terminal.

For more information about external device connections, see the manuals of your external devices.

* If your external device has a component

terminal, COMPONENT connection is

recommended (you can view high-quality

pictures).

<Example>

DVD Player, etc.

* If your external device has an S-video terminal,

S-VIDEO connection is recommended.

<Example>

Video camera

Home video game system

<Example>

VCR

Laser disc player

You can enjoy picture and sound by connecting a VCR or a home video game system to the terminals

located on the rear of the TV set.

When connecting an external device, turn off the power of the main unit first to prevent any possible

damage.

8

(72.5)

64

/

55

2

DIMENSIONS

(59.5)

32

/

11

2

MENU

CH

1617/32(420)

293/32(739)

LC-22SV2U

Unit: inch/(mm)

TV/VIDEO

41/4(108)

(462)

(462)

16

16

/

/

3

3

18

18

(367)

(367)

16

16

/

/

7

7

14

(95) 14

64

/

47

3

(180.6)

(180.6)

64

64

/

/

7

7

7

7

AUDIO OUT

195/16(490.62)195/16(490.62)

(268.32)

16

/

9

10

315/16(100)

AV-IN 1

(100)

16

/

15

3

(43.9)1

(43.9)

32

32

/

/

23

L

R

23

1

RGB

AV-IN 2

S-VIDEO

VIDEO

L

AUDIO

R
POWER

INPUT

DC13V

17/32(31)

633/64(165.4)

27

9

/32(250)

9

LC-22SV2U

REMOVING OF MAJOR PARTS

1. Remove the two terminal covers.

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

3. Remove the cabinet B fixing screws (17 pcs.).

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

5. Remove the reinforcement angle fixing screws (4 pcs.).

6. Detach the connector from each PWB.

Control Panel (Top Cover)

4

4

4

4

Cabinet A

4

3

4

Cabinet B

3

Terminal
Cover (S)

1

3

4

3

4

3

1

3

2

Terminal
Cover (L)

Stand

5

6

SC4561
(GD)

SC4902

6

(RM)

6

(GA)

P3701

6

P130(KK)

SC4901

6

(MA)

SC4701

SC1401

SC1401

P3504

SC3501

(MA)

(KK)

Analog PWB

P3502

6

(GB)

(RM)

P3702

P3503

Digital PWB

(MC)

(MB)

SC1402

P4501

SC1402

P3706

(MB)

(MC)

6

10

Operation PWB

(MU)

6

(MU)

P3705(PF)

Reinforcement
Angle

Inverter PWB

6

6

P706

(PF)

6

6

6

P6551

P6552

P6553

P6554

7. Remove the top cover fixing screws (2 pcs.).

8. Remove the control PWB fixing screws (2 pcs.).

9. Remove the digital PWB fixing screws (4 pcs.).

10. Detatch the chassis frame cover fixing hooks (5 pcs.).

11. Remove the analog PWB fixing screws (3 pcs.).

12. Remove the inverter PWB fixing screws (4 pcs.).

13. Remove the R/C, LED PWB fixing screws (2 pcs.).

9

9

LC-22SV2U

Digital PWB

11

Analog PWB

Chasis
Frame Cover

10

10

Operation PWB

Chassis Frame

8

12

Inverter PWB

7

Control Panel
(Top Cover)

R/C, LED PWB

13

11

LC-22SV2U

» Precautions in handling the LCD panels

1. Work in a clean room (with humidities below 50%).

2. Be sure to wear an anti-static armband.

3. Handle the panels on an electroconductive mat.

4. Be careful not to fall, shake and shock the panels.

14. Remove the LCD panel unit fixing screws (4 pcs.).

15. Remove the reflection/deflection, prism and diffusion sheets.

16. Remove the ITO earth spring fixing screw (1 pc.).

17. Remove the ITO sheet and diffusion panel.

18. Remove the lamp fixing holder fixing screws (6 pcs.).

19. Detach the lamp clip (4 pcs.).

20. Detach the lamp unit-A/B.

21. Remove the reflection panel fixing screws. (6 pcs.).

Diffusion Panel
(PCOVU0108CEZZ)

ITO Earth Spring
(MSPRP1220CEFW)

16

22" LCD Panel
Unit
(RLCDTA011WJZZ)

Lamp Fixing Holder
(LHLDZ2184CEKZ)

15

14

Back Sheilding Plate
(PSLDM4699CEFW)

Lamp Clip
(LHLDZ2185CEZZ)

18

17

Diffusion Sheet
(PSHEP0294CEZZ)

Prism Sheet
(PSHEPA002WJZZ)

Reflection / Deflenction Sheet
(PSHEPA003WJZZ)

19

18

Lamp Fixing Holder
(LHLDZ2184CEKZ)

ITO Sheet
(PSHEP0295CEZZ)

21

20

Lamp Unit-A
(KLMP-0126CEZZ)

Lamp Unit-B
(KLMP-0127CEZZ)

Reflection Panel
(PMiR-0299CEZZ)

12

LC-22SV2U

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.

1.Preparation for Adjustments

(1)Use the exclusive-use AC adapter or stable DC power supply.

AC adapter: UADP-0243CEPZ
DC power supply: 13 ± 0.5V

2.Special mode setting procedure

(1)After initialization of E2PROM the mode is changed to the adjustment mode.

[Procedure]
Connect TP3513 and TP3514 to GND, and turn on the power.

[Description]

» The initialization of microprocessor is as follows.
» AV position, DAC data, G/A data, sound processor data, and video chroma data adjustment values are taken as

defaults.

(2)Adjustment mode

[Procedure]
Short-circuit TP3513 to GND, and turn on the power.
Or short-circuit TP3514 to GND, and turn on the power.
Or holding down the [TV/VIDEO] key and [MENU] key, turn on the main power, and simultaneously press the
(inspection process) [CH "] key and [VOL– ] key to change the mode to the adjustment mode.

[Description]
The manual adjustment or adjustment through communication with the automatic machine is performed.

(3)Shipping setting mode

[Procedure]
Holding down the [TV/VIDEO] key and [MENU] key, turn on the main power, and simultaneously press the
(inspection process) [CH '] key and [VOL+] key to change the mode to the shipping setting mode.
Note: Keep it in mind to turn off the power immediately. If any key-in is accidentally made, the setting will be

canceled.

[Description]
User adjustment and other values are taken as defaults.
If TV is indicated as SETTING COMPLETE, setting has been completed.

3.Cancel of special mode

Turn off the main unit power.

13

LC-22SV2U

4.Adjustments

Adjustment Adjusting conditions Adjusting method

1 B+ (5V) Adjustment

(R3750)

B+ (13V) Adjustment
(R4657)

2 Common-bias adjustment

3 TAMP adjustment

1. Connect the DC voltmeter to
positive (+) side of C3724 on
Analog PWB.

1. Connect the DC voltmeter to
TP4571 on Digital PWB.

Make this adjustment each for 50Hz,
and 60Hz. Select the input signal
according to the indication onscreen.

1. Go to "Adjustment process mode".

2. On the LCD, select "14" of "G/A
TEST PATTERN 1", dot inversion
flicker pattern 2.

3. Then, select "COM BIAS" on the
LCD.

1. Receive a half color bar signal in the
TV mode so that the top left zone
should turn white 75% as shown be­low. Other signal can be fed instead
of the half color bar signal, however,
if the point at the vertical 180th line
and horizontal 46th pixel is of white
75%. (Make the adjustment based
on the setting of this point.)

2. Adjust the "NTSC TAMP" setting on
page 2 of adjustment process mode
so that the "Y" reading on the same
page should be BB - CA.

3. Make the same setting for the PAL­M TAMP and PAL-N TAMP data.

Adjust the "B+ Adj" value to

5.0±0.02V with R3750. Make exact
adjustment of the 5.00V level because
it will be the reference for all the other
supply voltages.

Adjust the "B+ Adj" value to

13.00±0.02V with R4657. Make exact
adjustment of the 13.00V level be­cause it will be the reference for all
the other supply voltages.

Set the value so that the flicker on the
screen is minimized with [VOL+] and
[VOL-] key.

White 75% at
top left zone

Page 2 of adjustment process mode

2

COM BIAS 90
NTSCTAMP 20
PAL-M TAMP 20
PAL-N TAMP 20
CUTOFF
RX1 GX1 BX1 45 45 45
RY1 GY1 BY1 55 51 65
RX2 GX2 BX2 201 201 201
RY2 GY2 BY2 245 225 245
Y 00h
TAMP H CA
TAMP L BB

Vertical 180th line and
horizontal 46th pixel

640 pixels

480 lines

“Y” data
(white 75%)

4 White balance adjustment

1. Receive the monoscope pattern sig­nal.

2.Adjust the “RCUTOFF” and
“BCUTOFF” settings on page 2 of
adjustment process mode to achieve
an optimum white balance.

Note:This adjustment must be done

after again for 30 minutes or
longer.

14

1. Do not change the "GCUTOFF" set­ting because otherwise the black level
may fluctuate.

2. Check the "RX1", "GX1" and "BX1"
becomes "45" and "RX2", "GX2" and
"BX2" becomes "201" on page 2 of
process adjustment mode.

3. Check the "GY1" becomes "51" and
"GY2" becomes "225".

4. Adjust the "RY1", "BY1", "RY2" and
"BY2" to the optimal.

LC-22SV2U

Note:

When CUTOFF is chosen, it goes into the item selection mode by VOL (+) / (–) key and CURSOR (\) / (|) key.
It moves up and down by CH (') / (") key, and moves to right and left by VOL (+) / (–) key and CURSOR (\) /
(|) key. The selected item is determined by MENU key.
If determined, the selected item and the selected adjustment value will be displayed and VOL (+) / (–) key and
CURSOR (\) / (|) key will adjust.
An adjustment value is determined by MENU key and it returns to item selection.

5.Shipping setting list

Channel............................................................................................................................................... 2ch

Air/Cable ............................................................................................................................................. Air

Skip Data_CATV................................................................................................................................. All Skip

Skip Data_AIR .................................................................................................................................... All Skip

Volume................................................................................................................................................ 20

Picture................................................................................................................................................. 30

Tint ...................................................................................................................................................... 0

Color ................................................................................................................................................... 0

Black Level ......................................................................................................................................... 0

SHARPNESS...................................................................................................................................... 0

RED-BLUE.......................................................................................................................................... 0

GREEN ............................................................................................................................................... 0

TV Color System................................................................................................................................. N358

AV Color System ................................................................................................................................ N358

Language ............................................................................................................................................ English

Blue Screen ........................................................................................................................................ Off

EZ Setup Auto Start............................................................................................................................ On

Sleep Timer ........................................................................................................................................ None

MTS .................................................................................................................................................... Stereo

Brightness........................................................................................................................................... Bright

Auto Power Off ................................................................................................................................... Off

Up side................................................................................................................................................ Normal

Right / Left .......................................................................................................................................... Normal

AV2 IN/OUT ........................................................................................................................................ In

Closed Caption (Mode) ...................................................................................................................... OFF

(Data) ....................................................................................................................... CH1

V Chip block (MPAA) ..................................................................................................................... None

(TV Guideline) .......................................................................................................... None

(Block Content) ........................................................................................................ All Unblock

(Status)..................................................................................................................... Off

(Input Secret No.)..................................................................................................... Clear

15

LC-22SV2U

Test patterns in adjustment process mode

[1] IC801 (Video decoder) test patterns

1-1. Getting the test patterns displayed

Put the screen in AV1, AV2 or COMPONENT but keep out any signal. Call the adjustment process mode,
select “TEST PATTERN” in the 3rd line of page 7, make the settings 1 thru 6, and the following test patterns
show up.

1-2. Test patterns

» Setting 1

The color bars are displayed as shown at left.

Yellow

Green

Cyan

Magenta

Green

Red

Blue

greengreen

Yellow

» Setting 2

Finer vertical stripes than Setting 1 are displayed.

» Setting 3

Green

Bright BrightDark

» Setting 4

A rather dark green-only pattern is displayed.

» Setting 5

A half-tone green-only pattern is displayed.

» Setting 6

A rather bright green-only pattern is displayed.

[2] IC4561 (LCD controller) test pattern

2-1. Getting the test pattern displayed

Put the screen in AV1, AV2 or COMPONENT but keep out any signal. Call the adjustment process mode,
select “G/A TEST PATTERN1” in the 5th line of page 19, turn on the setting, and the following test pattern
shows up.

2-2. Test pattern

The following test pattern appears.

Cyan

Magenta

The green pattern is displayed as shown at left.

W

h

i
t

gradation

e

Dark
Dark
Dark

Black

0-level

Gray

scale

Red

Green

Blue

Gray

63-level

gradation

Bright

Bright
Bright
Bright

Gray
127-level
gradation

DarkDark

Dark
Dark
Dark

Gray
191-level
gradation

White

255-level

gradation

Note: When the IC801 and IC4561 test pattern display commands are both turned on at the same time, the IC4561

test pattern is given priority.

16

Pin functions of microprocessor IC (IC3501) RH-iXA396WJN1Q

No

. Pin name Function
1 V HOLD1
2 HLF1
3 N. C.
4 N. C.
5 VACT
6 CSYNC
7 IREMI
8 BYTE
9 CNVSS

10 N. C.
11 N. C.
12 RESET
13 XOUT
14 VSS
15 XIN
16 VDD
17 OSCIN
18 OSCOUT
19 PSWIN
20 VSYNC
21 BLK
22 N. C.
23 DAC1CS
24 DAC2CS
25 SCL1
26 SDA2
27 A_DA
28 SCK
29 SSI
30 SSO
31 N. C.
32 R
33 G
34 B
35 TxD
36 RxD
37 SCLK
38 BUSY
39 A_ENA
40 N. C.
41

MREADY/EPM
42 L_ERR
43 S IN/OUT
44 SCSB
45 SRDYB
46 CE
47 CK
48 DA
49 PD
50 VSH_OUT

For CCD
For CCD
L output fixed
L output fixed
Scaller IC
Composite sync Signal
Remote control signal input
GND
GND/FLASH write (3.3V)
L output fixed
L output fixed
Reset input (H;Normal, L;Reset)
System clock output
GND
System clock input
Power (3.3V)
OSD frequency input
OSD frequency output
Main power input (H;OFF, L;On)
Scaller
OSD blank output

DAC1 chip select
DAC2 chip select
I2C bus clock putput
I2C bus ddata in/output
Autowide
Scaller clock output
Scaller data input
Scaller data output
L output fixed
OSD R signal output
OSD G signal output
OSD B signal output
FLASH write
FLASH write
FLASH write
FLASH write
Autowide
L output fixed
External bus mode shift input/FLASH write (H;Normal, L;External bus mode shift demand)
Lamp error detect input (H;Error, L;Normal)
AV2 audio in/output select (H;Input, L;Output)
For scaller IC
For scaller IC
FLASH write
For autowide
For autowide
For autowide
Regulator control output (H;On, L;Off)

No

. Pin name Function
51 REQ_OUT
52 AV/SY/DY2
53 SMUTE
54 AV/SY/DY1
55 HPDET
56 PAMUTE
57 VSH IN
58 DEF
59 V IN/OUT
60 SRESET
61 MAINSW
62 HSYNC
63 POWIN
64 VSYNC
65 TV/AV1
66 AV/AV2
67 VIS/3DS
68 AV1/VISY
69 N. C.
70 VACT_CONT
71 PMUTE
72 TVPOW
73 N. C.
74 TIMER_LED
75 OPC_LED
76 PRT_LED
77 MP_CS
78 MP_DA
79 MP_CLK
80 DDC_RESET
81 KEY3
82 KEY4
83 PANEL_POW
84 N. C.
85 N. C.
86 N. C.
87 N. C.
88 SSW
89 AFT
90 N. C.
91 KEY1
92 KEY2
93 N. C.
94 OPC
95 N. C.
96 N. C.
97 N. C.
98 TVSETB
99 VCCE

100

CVIN1

LC-22SV2U

Completion output of external bus mode shift (H;Normal, L;External bus mode)
CCD input select (H;COMPONENT input, L;Other)
Audio mute input (H;On, L;Off)
CCD select (H;S input, L;Other)
Headphone detect (H;Normal, L;Headphone insertion)
Speaker standby mute output (H;Off, L;On)
Regulator power detect (H;Normal, L;Abnormal)
Extrnal output audio mute output (H;On, L;Off)
AV2 video in/output select (H;Input, L;Output)
Multiplex reset output (H;Normal, L;Reset)
Main power On/Off (H;On, L;Off)
OSD horizontal sync signal input
DC/DC Start-up detect input (H;On, L;Off)
OSD vertical sync signal input
TV/External select (H;TV, L;External)
AV1/AV2 select (H;AV2, L;AV1)
S/3D select (H;3D signal except S, L;S input)
External/S select (H;S input, L;Except S input)
L output fixed
For scaller IC
Video mute output (H;On, L;Off)
TV power control (H;On, L;Off)
L output fixed
Off timer LED output (H;On, L;Off)
Auto save LED output (H;On, L;Off)
Slave IC error detect output (FLASH)
G/A chip select
G/A data output
G/A clock output
Digital decoder reset (H;Normal, L;Reset)
Key input 3
Key input 4
Panel power control (H;On, L;Off)
L output fixed
L output fixed
L output fixed
L output fixed
S terminal insert detect (H;Not connect, L;Connect)
AFT voltage input
L output fixed
Key input 1
Key input 2
L output fixed
Auto save sensor level input
Open
Open
Pull up
GND
Power(5V)
CCD video signal input

17

LC-22SV2U

Adjustment process mode menus at a glance

Page Item

1 INCH SIZE 22 Inch size select Adjustment

MODEL SV2U Model number
SYSTEM Color system select It changes with input mode
NTSC PWN FREQ OCO Change it to 1DD
PAL PWM FREQ OBD Change it to 1DD
NTSC PWM DUTY 0
PAL PWM DUTY 0
TV GAIN OFF
ERROR NO RESET 0 Lamp error count No. of lamp error detections
V-CHIP 1
CANADIAN VCHIP OFF Canadian VCHIP setting

2 COM BIAS 60 70 Counter bias adjustment (NTSC) Adjustment

COM BIAS 50 50 Counter bias adjustment (PAL, SECAM) Adjustment
NTSC TAMP 20 TAMP adjustment Adjustment
PAL-M TAMP 20 TAMP adjustment
PAL-N TAMP 20 TAMP adjustment
CUTOFF RX1, GX1, BX1 45 CUTOFF adjustment
CUTOFF RY1, GY1, BY1 51 CUTOFF adjustment Adjustment (RY1, BY1)
CUTOFF RX2, GX2, BX2 201 CUTOFF adjustment
CUTOFF RY2, GY2, BY2 225 CUTOFF adjustment Adjustment (RY2, BY2)
Y 00h Data read value at TAMP adjustment
TAMP H CA Upper limit setting at TAMP adjustment
TAMP L BB Lower limit setting at TAMP adjustment

3 TV NTSC CONT 40

TV PAL-M CONT 40
TV PAL-N CONT 40
AV PAL CONTRAST 42
AV NTSC CONTRAST 42
AV SECAM CONTRAST 42
AV PAL-M CONTRAST 42
AV PAL-N CONTRAST 42
AV PAL60 CONTRAST 42
V SCROLL 60 It changes with screen size.
V SCROLL 50 It changes with screen size.
H SCROLL 60 It changes with screen size.
H SCROLL 50 It changes with screen size.

4 TV GEQ BAND1 0.5

TV GEQ BAND2 0.5
TV GEQ BAND3 1
TV GEQ BAND4 0.5
TV GEQ BAND5 -1
EXT GEQ BAND1 0.5
EXT GEQ BAND2 0.5
EXT GEQ BAND3 1
EXT GEQ BAND4 0.5
EXT GEQ BAND5 -1
AVC OFF
CARRIER MUTE ON
IGR THR 12D

5 MSP DATA 0

MSP DATA WAIT
PRESCALE FM/AM-M 17
PRESCALE SCART 15
FSP TEST OFF

6 I2C DATA 0

I2C DATA WAIT
CBW 1
NOSEL 3
DDR 1
HDG 3
VDG 0
VPK 0
KILVL 08 8
KILHY 05 5
VSYNC DELAY 29
VDCO -720

Initial setting

Function Adjust/modify

Adjustment (Same setting as for NTSC TAMP)
Adjustment (Same setting as for NTSC TAMP)

18

LC-22SV2U

Page Item

6 AUTO LCK 1
7 VPC DATA 0

VPC DATA WAIT
TEST PATTERN 0 Video IC Test pattern
AUTO LDLY 0
DVD NTSC CR 37
DVD NTSC CB 35
DVD NTSC TINT 5
DVD NTSC BRIGHTNESS
DVD NTSC CONTRAST 26
DVD NTSC P FILTER 1
DVD NTSC H-PEAKING 4
DVD NTSC BRIGHT2 7
DVD NTSC CONTRAST2 43

8 DVD PAL CR 42

DVD PAL CB 42
DVD PAL TINT 9
DVD PAL BRIGHTNESS 68
DVD PAL CONTRAST 26
DVD PAL P FILTER 1
DVD PAL H-PEAKING 4
DVD PAL BRIGHT2 7
DVD PAL CONTRAST2 43

9 N358 TV COLOR 1950

N358 AV COLOR 2000
N358 TV TINT 40
N358 AV TINT 37
N358 BRIGHTNESS 7
N358 PEAKING FILTER 2
N358 TV H-PEAKING 4
N358 AV H-PEAKING 4
N358 AVO START 145
N358 SFIF 0
N358 SCINC1
N358 TV LDLY -2
N358 AV LDLY -2

10 N443 A V COLOR 2000

N443 AV TINT 37
N443 BRIGHTNESS 7
N443 PEAKING FILTER 2
N443 AV H-PEAKING 4
N443 AVO ST AR T 145
N443 SFIF 0
N443 SCINC1
N443 AV LDL Y 0

11 PAL A V COLOR 2000

PAL A V TINT 37
PAL BRIGHTNESS 7
PAL PEAKING FILTER 2
PAL A V H-PEAKING 4
PAL A VO ST ART 145
PAL SFIF 0
PAL SCINC1
PAL A V LDL Y 0

12 SECAM AV COLOR 2000

SECAM AV TINT 37
SECAM BRIGHTNESS 7
SECAM PEAKING FILTER 2
SECAM AV H-PEAKING 4
SECAM AVO ST AR T 145
SECAM SFIF 0
SECAM SCINC1
SECAM AV LDL Y 0

13 PAL-M TV COLOR 1950

PAL-M A V COLOR 2000
PAL-M TV TINT 40
PAL-M AV TINT 37
PAL-M BRIGHTNESS 7

Initial setting

72

1600&1078

1600&1078

1600&1078

1600&1078

Function Adjust/modify

19

LC-22SV2U

Page Item

13 PALM PEAKING FILTER 2

PALM TV H-PEAKING 4
PALM A V H-PEAKING 4
PAL-M A VO ST ART 145
PAL-M SFIF 0
PAL-M SCINC1
PAL-M TV LDLY 0
PAL-M A V LDL Y 0

14 PAL-N TV COLOR 1950

PAL-N AV COLOR 2000
PAL-N TV TINT 40
PAL-N AV TINT 37
PAL-N BRIGHTNESS 7
PALN PEAKING FILTER 2
PALN TV H-PEAKING 4
PALN A V H-PEAKING 4
PAL-N AVO ST AR T 145
PAL-N SFIF 0
PAL-N SCINC1 1600&1078
PAL-N TV LDLY 0
PAL-N AV LDL Y 0

15 PAL60 A V COLOR 2000

PAL60 A V TINT 37
PAL60 BRIGHTNESS 7
PAL60 PEAKING FILTER 2
PAL60 A V H-PEAKING 4
PAL60 A VO ST ART 145
PAL60 SFIF 0
PAL60 SCINC1 1600&1078
PAL60 A V LDL Y 0

16 AFT UP 2.7

AFT DOWN 1.8
NTSC 01 0
NTSC 02 0
NTSC 03 1
NTSC 04 0
NTSC 05 0
NTSC 06 0
NTSC 07 0
NTSC 09 10
NTSC 0A 0
NTSC 0B 0
NTSC 10 0
NTSC 11 0
NTSC 12 80
NTSC 13 E1
NTSC 14 1
NTSC 15 0
NTSC 16 10
NTSC 17 61
NTSC E0 0
NTSC E1 0
NTSC F0 7
NTSC F3 DD
NTSC F4 1
NTSC F5 0
NTSC F6 0

17 PAL 01 8E Initial settings

PAL 02 0 Various setting
PAL 03 1 Various setting
PAL 04 0 Starting pulse position
PAL 05 0 Starting pulse position
PAL 06 0 Horizontal display position
PAL 07 0 Vertical display position
PAL 09 10 Panel clock adjustment
PAL 0A 0 Display top mask position
PAL 0B 0 Display bottom mask position

Initial setting

1600&1078

Function Adjust/modify

20

LC-22SV2U

Page Item

17 PAL 10 0 Test pattern display

PAL 11 0 Test pattern data
PAL 12 0 Flicker pattern data
PAL 13 E1 OEM lower start
PAL 14 1 OEM lower start
PAL 15 0 OEM lower end
PAL 16 10 OEM lower end
PAL 17 61 SP position
PAL E0 0 Test circuit setting
PAL E1 0 Test circuit setting
PAL F0 7 PWM setting output
PAL F3 DD PWM FREQ LBIT
PAL F4 1 PWM FREQ HBIT
PAL F5 0 PWM DUTY LBIT
PAL F6 0 PWM DUTY HBIT
CLOSED CAPTION 15
CCD ISO 16
AIR SERCH 1.6

18 VL256 70

REF256 79
VL224 54
REF224 113
VL192 43
REF192 101
VL160 46
REF160 193
VL128 60
REF128 192
VL96 52
REF96 228

19 VL64 100

REF64 166
VL0 110
REF0 180
G/A TEST PATTERN1 0 LCD Controller IC Test pattern
G/A TEST PATTERN2 0 LCD Controller IC Test pattern
G/A DATA 0
G/A DATA WAIT

20 LSYNC 625

HSYNC 655
AVSYNC 5000
VPC FP20H
VPC FP21H
VPC FP13H
MSP DEMO200H
L ERROR WAIT 15s
L ERROR H TIME 3.0s
VPC I2C 20H 24

21 DENKA PORT OFF

DENKA TESTP 0
DENKA TESTP2 30ms

22 50 OPC LV0 0

50 OPC LV1 8
50 OPC LV2 16
50 OPC LV3 24
50 OPC LV4 32
50 OPC LV5 40
50 OPC LV6 48
50 OPC LV7 56
50 OPC LV8 64
50 OPC LV9 72
50 OPC LV10 80

23 60 OPC LV0 0

60 OPC LV1 8
60 OPC LV2 16
60 OPC LV3 24
60 OPC LV4 32

Initial setting

Function Adjust/modify

21

LC-22SV2U

Page Item

23 60 OPC LV5 40

60 OPC LV6 48
60 OPC LV7 56
60 OPC LV8 64
60 OPC LV9 72
60 OPC LV10 80

24 3D Y/C 2

3D Y/C DATA 0
3D Y/C DATA WAIT
CLKS 1
EXCSS 1
CDL 2
DYCOR 5
DYGAIN 12
DCCOR 6
DCGAIN 6
06H 100
08H TV:23

SELD2FH 0
11H 8

Initial setting

Other:26

Function Adjust/modify

22

TROUBLE SHOOTING TABLE

No or Wrong

Picture

No

No

No

No

Yes

No

Yes

Yes

Yes

Yes

Does the IC801

test pattern appear

properly?

Does the IC4561 test

pattern appear

properly?

Check the IC801 signal

output line, IC801 itself

and its peripheral

circuits.

Are the waveforms at

pins (74), (75), (77) and

(80) of IC4561 as

specified?

Check IC4561 and its

peripheral circuits as

well as the LCD panel

voltage and waveform.

Are the waveforms at

pins (13), (126), (127),

(128) and (129) of

IC4101 as specified?

Are the waveforms at the signal

input pins of IC801 as specified?

TV/Composite,

S Video … Pins (71) and (72)

Component … Pins (4), (5), (6)

and (75)

Check the IC801 signal

input line.

Check IC801 and its

peripheral circuits.

Check the related lines,

IC801 itself and its

peripheral circuits.

Check the IC4101 signal

output line, IC4101 itself

and its peripheral circuits

No

LC-22SV2U

INCH SIZE 22

MODEL SV2U

SYSTEM N358

Go to the adjustment process mode.

1

NTSC PWM FREQ 1DD

No Power (Power LED indicator still in red)

PAL PWM FREQ 1DD

NTSC PWM DUTY 0

PAL PWM DUTY 0

TV GAIN OFF

ERROR NO RESET 5

V-CHIP 1

CANADIAN VCHIP OFF

SV2U VER 1.xx

Turn off the power.

Move the cursor to ERROR NO RESET

and click on it (to reset to zero).

Is the power turned on again?

F6553, F6554, D6551, D6552, D6553, D6554, Q6551, Q6552, Q6553, Q6554,

Q6555, Q6556, Q6557, Q6558, Q6559, Q6560, Q6561, Q6562 and their

peripheral parts as well as pin (31) of IC4561 (OFL).

D3713, D3714, Q3705, Q3706, Q3707, Q3709 and their peripheral parts as

well as pin (42) of IC3501 (L-ERR).

Check the following points.

(1) Backlight lamp

(2) Inverter circuit (Inverter PWB, Digital PWB and Analog PWB)F6551, F6552,

(3) Lamp error detection circuit (Analog PWB) D3709, D3710, D3711, D3712,

This model is equipped with the lamp error detection function that detects the current

flowing into the fluorescent lamp and protects the backlight lamp drive circuit.

If a lamp error is detected, the microprocessor interrupts the unit and the ERROR NO

RESET setting will go up.

When the ERROR NO RESET setting has reached "5", the microprocessor turns and

keeps off the unit's power. To resume the power, take the above procedure to clear the

Note:

ERROR NO RESET setting.

23

LC-22SV2U

Do F3701and F3702

function?

Check all the settings on the microprocessor

’s adjust process menu.

Are secondary outputs

(+38V, +9V, +5V, -8V) of

T3701 as specified?

Are the oscillation waveform

at T3701’s primary side as

specified?

Disconnect F3701and

F3702. Is the load side

short-circuited?

Is any of T3701

’s primary

side, Q3711, Q3712 and

SW136 short-circuited?

Check J3701, its peripheral

parts and connection cable.

Replace F3701 and F3702.

Check SW136 and

connection cable.

Check the secondary-side

load of T3701.

Does F6551, F6552,

F6553 and F6554

function?

Is Pin (31) of IC4561 at

“H”?

Are the oscillation waveforms

at the primary side of T6551-

T6557 and T6558 as

specified?

Replace F6551, F6552,

F6553 and F6554.

Check the line, IC4561 and

its peripheral parts.

Check Q6551, Q6552, Q6554,

Q6555, Q6557, Q6558,

Q6560, Q6561, T6551-T6558

and their peripheral parts.

Is any of Q6553, Q6556,

Q6559 and Q6562 short-

circuited?

Check the Q6553, Q6556,

Q6559, Q6562 and their

peripheral parts.

Replace the fluorescent lamp

and check the oscillation

waveform again.

No picture and sound

Yes

No

No

Yes

No

Yes

No

Fluorescent lamp

Yes

No

Yes

No

Yes

Yes

No

Yes

No

Yes

TROUBLE SHOOTING TABLE (Continued)

24

TROUBLE SHOOTING TABLE (Continued)

No color

No TV color

No S-VIDEO color

Yes Yes

No

Yes

No VIDEO color

No COMPONENT color

No

No

Is input at pin (71) of IC801

as specified?

Is there signal at pin (11) of

IC7012?

Check the output of IC801,

input of IC4101 and their

peripheral parts

Check IC7012, SC-OUT line

and their peripheral parts

Check all the settings on the microprocessor

’s adjust process menu.

Is input at pins (4) and (6) of

IC801 as specified?

Check J3404, PB line, PR line

and their peripheral parts.

Check SC3405, ViSC line,

IC7012 and their peripheral

parts.

LC-22SV2U

25