Sharp LC-30HV6U Schematic

LC-30HV6U

SERVICE MANUAL

SY3M2LC30HV6U

LIQUID CRYSTAL 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.

OUTLINE

This model is different in the display size from the LC-37HV6U. This service manual accordingly describes the display alone. For the entire AVC System, refer to the LC37HV4U Ser vice Manual (SY3M1LC37HV6U).

CONTENTS

Page

» IMPORTANT SERVICE SAFETY PRECA UTION .....2

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

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

» DIMENSIONS ....................................................12

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

» ADJUSTMENT PROCEDURES.........................17

» 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........ 68

» PARTS LIST ....................................................... 90

» PACKING OF THE SET ...................................109

LC-30HV6U

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-30HV6U

1 1

IMPORTANT SERVICE SAFETY PRECAUTION

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

WARNING

» Use an AC voltmeter ha ving with 5000 ohm per v olt,

or higher, sensitivity or measure the A C v oltage drop

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

2. Disconnect AC power before servicing.

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 necessar y, a nonpolarized adaptor plug must be used only for the purpose of completing these checks.) Any reading of 0.75V rms (this corresponds to 0.5 mA rms AC.) or more is excessive and indicates a potential shock hazard which must be corrected

A V

CAUTION: FOR CONTINUED

PROTECTION AGAINST A RISK OF FIRE REPLACE ONLY WITH SAME TYPE FUSE. A VC SIDE:

F701 (2A, 250V) FUSE. LCD SIDE: F701, F702 (4A, 250V), F708 (500mA, 125V), F730 (2A, 125V), F703, F6551, F6552, F6553, F6554, F6555, F6556 (2A, 250V)

before returning the monitor to the owner.

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. » 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

TO EXPOSED METAL PARTS

earth ground, such as electrical conduit or electrical ground connected to an earth ground.

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DVM

AC SCALE

1.5k ohm 10W

0.15 µF

TEST PROBE

CONNECT TO KNOWN EARTH GROUND

SAFETY NOTICE

Many electrical and mechanical parts in Liquid Crystal color television have special safety-related characteristics. These characteristics are often not evident from visual inspection, nor can protection afforded by them be necessarily increased by using replacement components rated for higher voltage , wattage, etc. Replacement parts which have these special safety characteristics are identified in this manual; electrical

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components having such features are identified by “ å” and shaded areas in the

Replacement Parts List

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.

and

LC-30HV6U

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

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

AVERTISSEMENT

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

2. Débrancher le récepteur avant toute réparation.

PRECAUTION: POUR LA PROTECTION CONTINUE CONTRE LES RISQUES D'INCENDIE, REMPLACER LE FUSIBLE CÔTÉ AVC:F701 (2A, 250V)

A V

CÔTÉ LCD:F701, F702 (4A, 250V), F708 (500mA, 125V), F730 (2A, 125V), F703, F6551, F6552, F6553, F6554, F6555, F6556 (2A, 250V)

VERIFICATIONS CONTRE L'INCEN-DIE ET LE CHOC ELECTRIQUE

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 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 suiv ante:

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

• A l'aide de deux fils à pinces, brancher une résistance de 1.5 kΩ 10 watts en parallèle a v ec un condensateur de 0,15µF en série avec toutes les pièces métalliques exposées du coffret et une terre connue comme une

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

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

• Toucher avec la sonde d'essai les pièces métalliques exposées qui présentent une voie de retour au châssis (antenne, coffret métallique, tête des vis, arbres de commande et des boutons, écusson, etc.) et mesurer la chute de tension CA en-travers de la résistance. Toutes les vérifications doivent être refaites après avoir inversé la fiche du cordon d'alimentation. (Si nécessaire, une prise d'adpatation non polarisée peut être utilisée dans le but de terminer ces vérifications.) Tous les courants mesurés ne doivent pas dépasser

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

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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.

LC-30HV6U

Precautions for using lead-free solder

1 Employing lead-free solder

"PWBs" of this model employs lead-free solder. The LF symbol indicates lead-free solder, and is attached on the PWBs and service manuals. The alphabetical character following LF shows the type of lead-free solder. Example:

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

SPECIFICATIONS

Item 30" LIQUID CRYSTAL TELEVISION, Model: LC-30HV6U

TV Function

American TV Standard NTSC System

VHF/UHF

VHF 2-13ch, UHF 14-69ch

CATV 1-125ch

Audio multiplex BTSC System

Terminals S-VIDEO in, AV in, COMPONENT in

INPUT 2

S-VIDEO in, AV in

INPUT 3

S-VIDEO in, AV in, COMPONENT in, DVI-HDTV in

ANTENNA 75 Ω Unbalance, F Type for VHF/UHF/CATV in

INPUT 4 S-VIDEO, AV in PC

15 Pin mini D-Sub, Audio in (Ø 3.5mm jack)

OSD language English/French/Spanish Power Requirement

AC 110-240 V, 50/60 Hz

Power Consumption

42W (0.4W Standby with AC 120 V)

Weight

12.1 lbs./5.5 kg (w/o stand), 12.3 lbs./5.6 kg (with stand)

Accessories Operation manual (× 1), Remote control unit ( ×1), System cable ( ×1), AC cord

(× 2), “AA” size battery ( × 2), AVC sytem stand unit (× 1), Cable clamp (Large

×1, Small × 1), RF cable (× 1)

TV-standard (CCIR) Receiving

Channel

Rear INPUT 1

Front

LCD panel 30" Advanced Super View & BLACK TFT LCD Number of dots 2,949,120 dots (1280 × 768 × 3dots)

Brightness 430 cd/m

Backlight 60,000 hours (at Backlight Standard position) Viewing angles H : 170° V : 170° Audio amplifier 10W × 2 Speakers Ø 8cm 2pcs, Ø 2.5cm 2pcs

AVC System

Monitor Out Audio (Variable, Fixed), S-VIDEO out, AV out

Headphones

Ø 3.5mm jack

AVC System Display AVC System

Display

99W (0.2W Standby with AC 120 V)

28.9 lbs./13.1 kg (Display only), 35.5 lbs./16.1 kg (with Display and speaker),

44.3 lbs./20.1 kg (with Display, speaker and stand)

DC OUTPUT DC 6.5V 7W MAX

4 Ω 10W (L/R)

EXT. SPEAKER

Specifications are subject to change without prior notice.

LC-30HV6U

Part names

OPC indicator*

POWER indicator

MAIN POWER

button

OPC sensor

Display

POWER button

INPUT

button

VOLUME buttons

(VOL–/+)

CHANNEL buttons

(CHÙ/ù)

Remote control sensor

*OPC: Optical Picture Control

(See page 32.)

SLEEP indicator

Front view

CLEAR*

MAIN POWER button

INPUT 4 terminal (S-VIDEO)

INPUT 4 terminal (VIDEO)

PC INPUT terminal (AUDIO)

INPUT 4 terminals (AUDIO L/R)

PC INPUT terminal (ANALOG RGB)

AVC System

Rear view

INPUT 1 COMPONENT

video terminals (Y, P

, P

)

INPUT 3 COMPONENT

video terminals (Y, P

, P

)

MONITOR OUTPUT terminal

(S-VIDEO)

DISPLAY OUTPUT 1 terminal

DISPLAY

OUTPUT 2

terminal

AC INPUT

terminal

RS-232C

terminal

MONITOR OUTPUT terminals (AUDIO L/R)

Antenna (A) input terminal

Antenna (B)

input terminal

Antenna (A) output

terminal

DVI-HDTV

INPUT

terminal

INPUT 3 terminal (S-VIDEO)

INPUT 3 terminal (VIDEO)

INPUT 3 terminals (AUDIO L/R)

INPUT 1 terminal (S-VIDEO)

INPUT 1 terminal

(VIDEO)

INPUT 1 terminals

(AUDIO L/R)

INPUT 2 terminal (S-VIDEO)

INPUT 2 terminal (VIDEO)

INPUT 2 terminals

(AUDIO L/R)

How to open the door.

STANDBY/ON indicator

* If the AVC System is switched on but it does not appear to be operating corr ectly, it may need resetting. In this

case, press CLEAR, shown in the diagram, lightly with the end of a ballpoint pen or other pointed object.

This will reset the System as shown below.

• AV MODE resets to STANDARD

• TV channel returns to initial channel setting (Air:2ch, Cable:1 or 2ch)

• Twin picture resets to normal

• Audio setting initializes

• Dolby virtual resets to Off

• Image position initializes

NOTE

• Pressing CLEAR will not work if the System is in standby mode (indicator lights red).

• Pressing CLEAR will not delete channel preset or secret number. See page for clearing the secret number when you

know it. See page for initializing to the factory preset values when you forget your secr et number.

Headphone

(When connecting headphones, the sound from the

speakers is muted.)

DC OUTPUT terminal

(Terminal for expanded functionality in

the near future.)

MONITOR OUTPUT terminal

(VIDEO)

DISPLAY OUTPUT 3 terminal

EXTERNAL SPEAKER terminals

OPERATION MANUAL

Part names

Remote control unit

NOTE

• When using the remote control unit, point it at the Liquid

Crystal Television.

ANT-A/ B

INPUT

Virtual

TWIN

MODE

POWER

MTS CC

PICTURE

SELECT

SUB TWIN CH

–

FREEZE

MODE

VOL CH

MUTE

MENU TV/SAT/DVD

FAVORITE CH

RECEIVER

DTV/DVD TOP

SOURCE DTV/SAT

DTV/SAT

VCR REC

ABCD

RETURN

POWER

SET/

ENTER

GUIDE

INPUT VOL

–

VOL

INFO

VIEW

SLEEP LEARN

EDIT/

ENT

FLASHBACK

DISPLAY

INPUT

TV VCRCBL

/SAT

/DTV

DVD

/LD

123

456

789

100

POWER

24 25

12 13

1 TV POWER: Switch the Liquid Crystal Television power

on or off.

Virtual: Select Virtual Dolby Surround settings.

3 AV MODE: Select an audio or video setting.

(AV mode: STANDARD, MOVIE, GAME, USER,

DYNAMIC (Fixed), DYNAMIC. PC mode:

STANDARD, USER.)

4 VIEW MODE: Select the screen size.

5 DISPLAY: Display the channel information.

6 SLEEP: Set the sleep timer.

7 FLASHBACK: Return to the previous channel or input

exter

+ –

nal mode.

8VOL/ : Set the volume.

9 MENU: Display the menu screen.

10 MENU RETURN: Return to the previous menu screen.

11 ///: Select a desired item on the screen.

12 ANT-A/B: Select between ANT-A and B to watch

broadcasts via the two tuners.

13 INPUT: Select a Liquid Crystal Television input source.

(TV, INPUT 1, INPUT 2, INPUT 3, INPUT 4, PC)

: When pressed all buttons on the remote control unit

will light. The lighting will turn off if no operations are

performed within about 5 seconds. This button is used

for performing operations in dark places.

15 MTS: Select the MTS/SAP.

16 CC: Display captions during closed-caption source.

17 TWIN CH buttons

TWIN PICTURE: Set the twin picture mode.

Press again to return to normal screen.

FREEZE: Set the still image. Press again to return to

normal screen.

SELECT: Select the active screen.

SUB INPUT: Select an input source of sub screen.

TWIN CH : Select the channel of sub screen.

18 0 – 9: Set the channel.

19 100 ENT: Select the three digit mode. Execute a

command of the channel.

20 CH /

: Select the channel.

21 MUTE: Mute the sound.

22 SET/ENTER: Execute a command.

23 FAVORITE CH

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

different categories.

When

viewing via ANT-A: up to 16 channels can be

assigned in A, B, C and D.

When viewing via ANT-B: up to 16 channels can be

assigned in A, B, C and D.

With ANT-A and B combined, you can preset up to 32

favorite channels in advance.

While watching, you can toggle the selected channels

by pressing A, B, C and D.

24 LED for transmission confirmation

25 Mode switch:

Setting the System in place

Handling the Display

CAUTION

• When using the TV with the supplied stand attached, do not

remove the speaker. Doing so may disturb the balance

leading to product damage or personal injury.

• Do not remove the stand and speaker from the Display unless

using an optional bracket to mount it.

• Keep enough space above and behind the Display.

• The Display is heavy. Move it with two or more people.

• When you move the Display, hold the portion of the Display, not

the speaker.

Handling the AVC System

CAUTION

• Do not put a VCR or other device on the AVC System.

• Keep enough space above and on the sides of the AVC System.

• Do not block the ventilation openings on the top and left side,

and the exhaust fan on the right side.

• Do not spread a thick cloth beneath the AVC System, or cover it

with one, as this can cause overheating and result in malfunction.

Where to place the System

“System” means the Display and AVC System. First select the location where to place the System.

Selecting the location of the System

• Select a place with no direct sunlight and good ventilation.

• The Display and the AVC System are connected by the system cable.

Keep enough space

System cable

AVC System

Display

There is an

exhaust fan on

the right side.

4 inches

(10 cm)

or more

2 inches

(5 cm) or more

2 inches

(5 cm) or

Preparation

If you want to keep a longer distance between the Display and AVC

System, please purchase the optional system cable AN-07SC1

(about 23 feet/7 meters).

IMPORTANT

• You cannot use external speakers when you are using the optional

system cable (AN-07SC1).

CAUTION

Adjust the screen with both

hands. Put one hand on the

Display and tilt the screen

while steadying the stand

with your other hand.

You can adjust the screen

vertically up to 4 degrees

forward or 6 degrees back-

ward, or rotate 10 degrees

horizontally.

LC-30HV6U

System cable

AVC System (rear view)

AC cord

Display (rear view)

Setting the System

After putting the Display and the AVC System in place, connect the system cables and AC cords. Use the

cable clamps for bundling the cables.

Preparation

Connecting the system cable and the AC cord to the Display

Removing the terminal cover

Connecting the system cable and the AC cord to the AVC System

CAUTION

• TO PREVENT RISK OF ELECTRIC SHOCK, DO NOT TOUCH UN-INSULATED PARTS OF ANY CABLES WITH THE

AC CORD CONNECTED.

Press down the four

upper hooks to remove

the cover toward you.

AC cord

(GRAY)

Connect the plug firmly until

the hooks on both sides click.

(WHITE)

Connect the plug into the

terminal and secure it by

tightening the thumb screws.

(BLACK)

Connect the plug completely.

(BLACK) (WHITE) (GRAY)

You cannot use external

speakers when you are using

the optional system cable

(AN-07SC1).

IMPORTANT

System cable

Attaching the clamps and bundling the cables with the clamp

Closing the terminal cover

Cable clamp (Large)

Insert the cable

clamp in the hole

on the Display leg

as shown.

Cable clamp (Small)

Peel off the seal

on the back and

attach as shown.

Display (rear view)

Cables come

out from the

small opening.

Arrange the system

cable as shown in

the illustration.

Preparation

Setting the Display on the wall

CAUTION

• Installing the Liquid Crystal Television requires special skill that should only be performed by qualified service

personnel. Customers should not attempt to do the work themselves. SHARP bears no responsibility f or improper

mounting or mounting that results in accident or injury.

Using an optional bracket to mount the Display

• You can ask a qualified service personnel about using an optional AN-37AG1 bracket to mount the Display

to the wall.

• Carefully read the instructions that come with the bracket before beginning work.

Vertical mounting Angular mounting

Hanging on the wall

AN-37AG1 wall mount bracket. (See the bracket instructions for details.)

Setting the AVC System with the stand

How to install the AVC System vertically using the stand unit.

• Use the supplied stand unit for installing the AVC System vertically in an upright position.

Stick each spacer to the

stand as shown.

Peel each spacer

away from the

paper and attach

to the four bulging

areas on the stand.

Attach each cushion to

the stand as shown.

Fit the stand to the AVC

System.

Peel each cushion

away from the

paper and attach

to the four areas at

the bottom.

Insert the stand into the AVC

System, making sure that the

thick and thin bulges of the

stand align with the big and

small holes on the AVC

System.

Stand

spacer

Bulge

Stand cushion

Thin bulge

Thick

bulge

Big hole

Small

hole

Attach the stand using the

stand screws as shown.

Stand screw

The AVC System installed

vertically with the stand.

NOTE

• When mounting the AVC System vertically, always use the supplied stand. Be careful not to block vent holes when

standing up directly on the floor or a flat surface as this can result in equipment failure.

Attaching point

Bulge

5°

About setting the Display angle

• You can set the Display on the

wall up to 5 degrees forward

when the speaker is attached and

up to 20 degrees forward when

the speaker is not attached. Do

not set the angle outside those

ranges.

Using external equipment

Digital TV tuner

AVC System

(rear view)

AVC System

(front view)

AV Receiver

(Built-in Tuner Amp)VCR

DVD player

Game console/

Camcorder

You can connect many types of external equipment to your System, like a DVD player, VCR, Digital TV tuner, PC,

game console and camcorder. To view external source images, select the input source from INPUT on the

remote control unit or on the Display.

CAUTION

• To protect all equipment, always turn off the AVC System before connecting to a DVD player, VCR, Digital TV tuner,

PC, game console, camcorder or other external equipment.

NOTE

• Please refer to the relevant operation manual (DVD player, PC, etc.) carefully before making connections.

S-VIDEO

Y/P

PC-AUDIO

ANALOG RGB

S-VIDEO

DVI

LC-30HV6U

Appendix

PC compatibility chart

Apple and Macintosh are registered trademarks

of Apple Computer, Inc.

DDC is a registered trademark of Video Electronics

Standards Association.

Power Management is a registered trademark of

Sun Microsystems, Inc.

VGA and XGA are registered trademarks of

International Business Machines Co., Inc.

PC/MAC Resolution

Horizontal Frequency

Vertical Frequency

VESA Standard

31.5 kHz

37.9 kHz

31.5 kHz

37.9 kHz

31.5 kHz

37.9 kHz

37.5 kHz

43.3 kHz

31.5 kHz

35.1 kHz

37.9 kHz

48.1 kHz

46.9 kHz

53.7 kHz

48.4 kHz

56.5 kHz

60.0 kHz

68.7 kHz

45.0 kHz

48.1 kHz

64.0 kHz

34.9 kHz

49.7 kHz

60.2 kHz

640 x 400

720 x 400

VGA

640 x 480

WVGA 848 x 480

SVGA

800 x 600

1024 x 768XGA

1280 x 720

WXGA

1280 x 768

SXGA

1280 x 1024

VGA

640 x 480

MAC13"

XGA

1024 x 768

MAC19"

SVGA

832 x 624

MAC16"

60 Hz

85 Hz

60 Hz

85 Hz

60 Hz

72 Hz

75 Hz

85 Hz

60 Hz

56 Hz

60 Hz

72 Hz

75 Hz

85 Hz

60 Hz

70 Hz

75 Hz

85 Hz

60 Hz

67 Hz

75 Hz

RS-232C port specifications

Return codeCommand 4-digits Parameter 4-digits

PC Control of the System

• When a program is set, the Display can be controlled from the PC using the RS-232C terminal.

The input signal (PC/AV) can be selected, the volume can be adjusted and various other adjustments and

settings can be made, enabling automatic programmed playing.

•

Attach an RS-232C cable cross-type (commercially available) to the supplied Din/D-Sub RS-232C for the

connections.

NOTE

• This operation system should be used by a person who is accustomed to using computers.

Communication conditions

Set the RS-232C communications settings on the PC to match the display

’

s communications conditions.

The Display’s communications settings are as follows:

Baud rate:

Parity bit:

Data length:

Stop bit:

Flow control:

9,600 bps

8 bits

None

1 bit

None

Command format

Communication procedure

Send the control commands from the PC via the RS-232C connector.

The display operates according to the received command and sends a response message to the PC.

Do not send multiple commands at the same time. Wait until the PC receives the OK response before sending

the next command.

Eight ASCII codes CR+

Command 4-digits:Command. The text of four characters.

Parameter 4-digits:Parameter 0 – 9, x, blank, ?

Parameter

Input the parameter values, aligning left, and fill with blank(s) for the remainder. (Be sure that 4 values are input for the

parameter.)

When the input parameter is not within an adjustable range,

“ERR” r

eturns. (Refer to “Response code format”.)

No problem to input any numerical value for

“x” on the table.

When “?” is input for some commands, the present setting value responds.

C1 C2 C3 C4 P1 P2 P3 P4

0055

100

0009

–

????

LC-30HV6U

Command table

• About the command except being indicated here, it is outside the guarantee range of operation.

CONTROL ITEM COMMAND

PARAMETER

CONTROL CONTENTS

POWER SETTING It shifts to standby.

It input-switches by the toggle. (It is the same as an input change key)

It input-switches to TV. (A channel remains as it is. (Last memory))

It input-switches to INPUT1~INPUT4.

It input-switches to PC.

An input change is also included.

Although it can choose now, it is toggle operation in inside.

(Toggle)

Input terminal number (1

–4

)

AUTO

AV-Y/C

COMPONENT

AUTO

AV-Y/C

COMPONENT

DVI

(Toggle)

STANDARD

MOVIE

USER

GAME

DYNAMIC (Fixed)

DYNAMIC

Volume (0–60)

AV mode. (±10)

PC mode. (0–180)

AV mode. (±20)

PC mode. (0–99)

Only PC mode. (0

–180)

Only PC mode. (0

–40)

(Toggle) [AV]

An input change is included if it is not TV display.

In Air, 2–69ch is effective.

In Cable, 1–125ch is effective.

If it is not TV display, it will input-switch to TV.

Change toggle operation of tuner A/B.

Toggle operation of a closed caption.

(Toggle)

Side Bar [AV]

S.Stretch [AV]

Zoom [AV]

Stretch [AV]

Normal [PC]

Stretch [PC]

Dot by Dot [PC]

Zoom [PC]

Off

One screen

Twin screens

The channel number of TV

The channel number of TV +1

The channel number of TV –1

(Toggle)

OFF

CC1

CC2

(1–125)

AUTO

POWR

ITGD

ITVD

IAVD

IPCD

INP1

INP3

INPUT SELECTION A TOGGLE

INPUT SELECTION B

AV MODE SELECTION

VOLUME

POSITION

VIEWMODE

Dolby Virtual

TWIN PICTURE

CHANNEL

ANT-A/B

DIRECT

CH UP

CH DOWN

CHANNEL

H-POSITIONH-POSITION

V-POSITION

CLOCK

PHASE

INPUT 1

INPUT 3

AVMD

VOLM

HPOS

VPOS

CLCK

PHSE

ACDV

TWI N

DCCH

CHUP

CHDW

ANTS

CLCP

WIDE

INPUT1-4

Appendix

NOTE

• If an underbar (_) appears in the parameter column, enter a space.

• If an asterisk (*) appears, enter a value in the range indicated in brackets under CONTROL CONTENTS.

• As long as that from which the parameter ( ) in the table is a numerical value, it may write anything.

Return code (0DH)

Response code format

Normal response

Problem response (communication error or incorrect command)

Return code (0DH)

ERR

Basic adjustment settings

AV input mode menu items

List of AV menu items to help you with

operations

OPC

Backlight

Contrast

Brightness

Color

Tint

Sharpness

Advanced

C.M.S.

Color Temp.

Black

3D-Y/C

Monochrome

Film Mode

I/P Setting

Picture

No Signal Off

No Operation Off

EZ Setup

CH Setup

Speaker

Input Signal

Parental CTRL

Position

Stretch Mode

Picture Flip

Language

Treble

Bass

Balance

Dolby Virtual

Audio Only

Input Select

DNR

Audio Out

Quick Shoot

Audio

Power Control

Setup

Option

PC input mode menu items

List of PC menu items to help you with

operations

OPC

Backlight

Contrast

Brightness

Red

Green

Blue

C.M.S.

Picture

Power Management

Speaker

Input Signal

Auto Sync.

Fine Sync.

Picture Flip

Language

Audio

Power Control

Setup

Treble

Bass

Balance

Dolby Virtual

Option

Audio Only

Audio Out

Quick Shoot

LC-30HV6U

2129/64(545)

305/32(766)

DIMENSIONS

12(305)

315/32(88)

/64(79)

Unit: inch/(mm)

/64(644.2)

/16(100)

(385.8)

(18.5)

(497)

(608)

(422)

(58)

(100)

REMOVING OF MAJOR PARTS

Ë Ë

Ë Display

Ë Ë

1. Take off bottom terminal cover.

2. Take off the table stand by removing 6 screws.

3. Take off the speaker by removing 4 screws and disconnecting speaker terminals.

4. Take off the cabinet B by removing 18 screws and releasing the cabinet A’s 6 hooks.

Cabinet B

LC-30HV6U

Terminal Cover

Speaker

Table Stand

5. Take off the center angle by removing 8 screws and disconnecting 1 lead wire from the fan.

6. Take off the top cover assembly by removing 2 screws and detaching the connector.

7. Take off the insulating spacer by removing 2 screws.

Center Angle

Shield Sheet

Top Cover Ass'y

KEY PWB

P131 P130

MAIN PWB

P2103

P2002

POWER PWB

CN712

LC-30HV6U

8. Detach each connector (8 from the LCD Control PWB, 7 from the Main PWB, 4 from the Power PWB, 7 from the Inverter PWB, 1 from the speaker-Jack PWB, 1 from the R/C, LED PWB, 6 from the Inverter-GND PWB, 3 from the Audio PWB.)

INVERTER PWB

SC4601

SC4603

SC4601

LCD CONTROL PWB

SC4605

P2106

SC2001

P3801

P2004

P2004 P2104

P3803

P3804

P101

INVERTER-GND PWB

P8601

P8602

P8603

P8604

P8605

P8607

P3903

P3204

P8606

R/C, LED Unit AUDIO PWB MAIN PWB

9. Take off the 1-Bit Amp. PWB chassis by removing 3 screws.

10.Take off the LCD Control PWB by removing 4 screws.

11.Take off the Speaker retaining angle by 3 screws.

12.Take off the R/C, LED PWB by 2 screws.

13.Take off the Speaker-Jack PWB by 2 screws.

14.Take off the Speaker retaining angle by 3 screws.

SC4604

P2101

CN722

P2102

CN724

POWER PWB

SC4602

P7701

CN209

CN723

P201

SPEAKER-JACK PWB

P6564

P6551

P6553

P6555

P6558

P6560

P6562

R/C, LED PWB

1-Bit Amp. PWB Chassis

SPEAKER-JACK PWB

Speaker Retaining Angle

LCD CONTROL PWB

Speake Retainig Angle

15.Take off the Inverter PWB by removing 4 screws.

16.Take off the Power PWB by removing 5 screws. Remove insulation sheet.

17.Take off the Main PWB by removing 6 screws.

18.Take off the Audio PWB by removing 3 screws

19.take off the Inverter-GND PWB by removing 2 screw.

20.Take off the chassis frame by removing 1 screw.

21.Take off the reinforcement angles by removing 3 screws from each angle.

22.Take off the LCD panel unit by removing 2 screws.

LC-30HV6U

INVERTER-GND PWB

AUDIO PWB

Chassis Frame

18 17

Audio PWB Shield

Reinforcement

Angle

Shield

MAIN PWB

POWER PWB

Reinforcement Angle

INVERTER PWB

LC-30HV6U

• Precautions in handling the LCD panel

1. Handle the liquid crystal panel in a clean room (Humidity: 50% or more).

2. Be sure to wear an earth wristband.

3. Be careful not to drop and shock the liquid crystal panel.

4. Use an ionizer (within 30 cm).

23.Remove the four lock screws from the LCD panel.

24.Peel off the conductive sheet.

25.Detach the deflection sheet, prism sheet, diffusion sheet and diffusion panel.

26.Remove the two lock screws from ITO earth spring.

27.Remove the three lock scre ws from each of the top and bottom lamp holders , and detach the top and bottom lamp holders.

28.Detach the lamp assembly from the lamp clip.

Condutive Sheet

Lamp Clip (4 pcs.) (LHLDZA085WJZZ)

Deflection Sheet (PSHEPA108WJZZ)

30" LCD Panel Unit (RLCDTA026WJZZ)

Lamp Fixing Holder (Top) (LHLDZA083WJKZ)

Deflection Panel (PCOVUA017WJZZ)

Lamp Fixing Holder (Bottom) (LHLDZA084WJKZ)

ITO Earth Spring (MSPRP1220CEFW)

Diffusion Sheet (PSHEPA110WJZZ)

Prism Sheet (PSHEPA179WJZZ)

Lamp Fixing Holder (Top)

(LHLDZA083WJKZ)

Back Shield Ass'y

Reflection Sheet

Lamp Fixing Holder (Bottom) (LHLDZA084WJKZ)

Lamp (KLMP-A021WJZZ)

LC-30HV6U

ADJUSTMENT PROCEDURES

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

1. Preparation Note that the unit should be replaced when the receiver IC (IC2206), CONFIG ROM (IC2202) or microprocessor (IC2004) is replaced. Applicable unit: DKEYHC094FE51

2. Adjusting procedure

• VLS BIAS (15V) voltage adjustment

• Entering the adjustment process mode → COM BIAS adjustment → Background adjustment

3. How to enter the adjustment process mode (1) When the AVC center is not connected

• Turn OFF the monitor main power. Turning ON the monitor main power while pressing the "INPUT" key and "VOL (–)" ke y on the top face of the monitor main body together will establish the "Monitor Process" mode.

(2) When the AVC center is connected

• Turn OFF the monitor main power. Turning ON the monitor main power while pressing the "CH (Ù)" key and "VOL (+)" key on the top face of the monitor main body together will establish "Monitor Process" mode.

In each case of (1) and (2), "<K>" is displayed in the upper left portion of the screen. Then, pressing any key will bring you to the first page of the "Monitor Adjustment" mode. ~ To exit the adjustment process mode, turn OFF the main power.

4. Adjustment process mode key operation table

Key Cursor UP

Cursor DOWN

Cursor RIGHT

Cursor LEFT

ENTER

INPUT CH (ù)

CH (Ù)

VOL (+)

VOL (–)

Function 1 (when on the left side of a page) Moving up by one item or moving to the previous page (when at the top) Moving down by one item or moving to the next page (when at the bottom) Moving to the right by one item or moving to another page (in the case of the initial page) Moving to the left by one item or moving to another page (in the case of the initial page) Test pattern off

Moving to the next page Moving down by one item or moving to the next page (when at the bottom) Moving down by one item or moving to the next page (when at the bottom) Moving to the right by one item or moving to another page (in the case of the initial page) Moving to the left by one item or moving to another page (in the case of the initial page)

Function 2 (when changing a numeric value) Incrementing the adjustment value by one or executing the item (in the case of W or R items) Decrementing the adjustment value by one or executing the item (in the case of W or R items) Moving to the right by one item

Moving to the left by one item

Executing the item (in the case of W or R items) Moving to the next page Incrementing the adjustment value by one or executing the item (in the case of W or R items) Decrementing the adjustment value by one or executing the item (in the case of W or R items) Moving to the right by one item

Moving to the left by one item

LC-30HV6U

5. Adjustment 5-1.VLS BIAS (13V) voltage adjustment (R4231)

5-2.COM BIAS adjustment

5-3.Background adjustment

Connect a digital volt meter to TL4122 (or C4180+) on the LCD Control PWB and make a adjustment with the R4231 so that the voltage becomes 13.00V±0.05V.

Shift to the "COM BIAS" item with the cursor UP/DOWN key and select a numeric value with the cursor RIGHT/LEFT key. Changing the numeric value with the cursor UP/DOWN key will make appear the test patter n. Make an adjustment so that the flicker near the center of the screen is minimized.

Start up the set with the AVC System connected and adjust the background of the monitor.

• Procedure

-1) Display the adjustment screen (200-level gray scale on High side, 48-level gray scale on Low side).

-2) Adjust "R OFFSET", "G OFFSET" and "B OFFSET" so that the 200-level gr ay scale pattern becomes normative. Adjust the chromaticity of the High pattern (in the left portion of the screen) so that x = 0.290 and y =

0.299.

-3) Adjust "R GAMMA", "G GAMMA" and "B GAMMA" so that the 48-level gray scale pattern becomes normative. Adjust the chromaticity of the Low pattern (in the right portion of the screen) so that x = 0.276 and y = 0.278.

The above-mentioned adjustments can be made according to the following procedure.

LC-30HV6U

(1) Adjusting method using RS-232C

• Get a personal computer with a COM port (RS-232C) equipped with WINDOWS 95/98/me/2000/xp and a RS-232C crossing cable

• Start up the set with the RS-232C cable connected.

• Start up the terminal software.

(Freeware products available on the Internet can be used.)

• Make setting as shown below.

Baud rate : 9600 Data : 8 bits Parity : None Stop : 1 bit Flow control : None

• If the above setting is made correctly, pressing the "SET/ENTER" key on the PC will make "ERR" appear on the terminal software.

• In this state, entering a command shown in the table bellow and pressing the "SET/ENTER" ke y will allo w you to make an adjustment.

If "OK" is displayed on the terminal software after the "SET/ENTER" key is pressed, the command has been entered successfully. If "ERR" is displayed, enter the command again.

RS232C command table

Command MSET1001 MOFR~~~~ MOFG~~~~ MOFB~~~~ MGAR~~~~ MGAG~~~~ MGAB~~~~ MINF0000 MINF0001 MINF0002

Function Used to start the background adjustment. Used to adjust the value of R OFFSET. Used to adjust the value of G OFFSET. Used to adjust the value of B OFFSET. Used to adjust the value of R GAMMA. Used to adjust the value of G GAMMA. Used to adjust the value of B GAMMA. Used to display the R GAMMA table. Used to display the B GAMMA table. Used to display the G GAMMA table.

Remarks The adjustment ends with a numeric value other than 1001. Range: 0000 to 0512 (Initial value: 0255) Range: 0000 to 0512 (Initial value: 0255) Range: 0000 to 0512 (Initial value: 0255) Range: 0000 to 0255 (Initial value: 0100) Range: 0000 to 0255 (Initial value: 0100) Range: 0000 to 0255 (Initial value: 0100)

LC-30HV6U

Lamp error detection

1. Feature description This liquid-crystal color TV incorporates a lamp error detection feature (lamp error detection) that automatically turns OFF the power for safety under abnormal lamp or lamp circuit conditions. If anything is wrong with the lamp or lamp circuit or the lamp error detection feature is activated for some reason, the following will result.

1 The power of TV main body is turned OFF about 13 seconds after it is turned ON. (The power LED on 2 If 1 occurs five times consecutively, it becomes impossible to turn ON the power. (The power LED

2. Measures 2-1.Checking with lamp error detection OFF

Disconnect the cable connected to the AVC System Turn OFF the monitor main power. Turning ON the monitor main power while pressing the "INPUT" key and "VOL (–)" key together will establish the "Monitor Process" mode ("<K>" is displayed). Then, pressing any key will bring you to the first page of the "Monitor Process" mode. This allow you to check the lamp and lamp circuit for abnormal conditions. Check that "L ERR RESET" on the fourth line of the first page of the "Monitor Process" mode is 1 or more. If it is 1 or more, a lamp error has been detected.

2-2.Reset of lamp error count

After checking the lamp and lamp circuit for abnormal conditions, reset the lamp error count. Move the arrow to "L ERR RESET" on the fourth line of the first page of the "Monitor Process" mode with the cursor UP/DOWN ke y and select the numeric value of "L ERR RESET" with the cursor RIGHT/LEFT key. In this state, press the cursor UP/DOWN key to reset it to "0".

the front of the TV turns red from green and keeps blinking in red (ON for 250ms and OFF for 1sec).) keeps blinking in red (ON for 250ms and OFF for 1sec).)

First page of monitor process mode

SERVICE NOTHING COMBIAS NOTHING →L ERR RESET LCD PATTERN SOUND AND FAN OTHER VER M1.~~ CEEP4

Then perform operation checking and check that the lamp error detection feature is not activated.

30AD1

076 077 064 5

Values specific to each monitor

Resetting to "0"

•List of process adjustment modes (Display)

Table of contents of process mode Page 0 LCD Page 1

LC-30HV6U

PATTERN Page 1

SOUND Page 1

OTHER Page 1

LCD Page 2

LCD Page 3

LCD Page 4

OTHER Page 2

LC-30HV6U

Process adjustment list

1st level Page Item Setting range Initial value

Contents 0 NOTHING 0~255 112

COM BIAS 0~255 87 NOTHING 0~255 41 L ERR RESET Zero clear 0

LCD 1 MODE 50Hz, 60Hz, PC 60Hz

PWM CTRL 0~7 7 PWM FREQ 0~4095 1289 PWM DUTY1 0~4095 0 PWM DUTY2 0~4095 0 PHASDIF 0~255 0 PCLK1 0~3 0 PCLK2 0~7 0

2 MODE 50Hz, 60Hz, PC 60Hz

OS SW 0~1 0 OS D1 0~255 110 OS D2 0~255 123 OS D3 0~255 135 OS D4 0~255 155 OS D5 0~255 167 OS D6 0~255 174 OS D7 0~255 179

3 MODE 50Hz, 60Hz, PC 60Hz

OPC 0 0~85 00 OPC 1 0~85 20 OPC 2 0~85 29 OPC 3 0~85 38 OPC 4 0~85 47 OPC 5 0~85 56 OPC 6 0~85 65 OPC 7 0~85 75

4 MODE 50Hz, 60Hz, PC 60Hz

OPC 8 0~85 85 OS AUTO 0~1 0

PATTERN 1 PATTERN1 0~14 0

PATTERN2 0~12 0 R GAMMA 20~180 Display only 100 R OFFSET 0~510 Display only 255 G GAMMA 20~180 Display only 100 G OFFSET 0~510 Display only 255 B GAMMA 20~180 Display only 100 B OFFSET 0~510 Display only 255

SOUND 1 100HZ 0~255 92

400HZ 0~255 96 1KHZ 0~255 145 4KHZ 0~255 187 10KHZ 0~255 187 FAN START 0~255 224 FAN END 0~255 230 TEMP ERR 0~255 55

OTHER 1 CLR MODE 1 digit 0~4 0

W –

LCD DATA 4 digits 0~F –

R/W –

EEPROM 7 digits 0~F –

R/W –

SII861 6 digits 0~F –

R/W –

2 L ERR STOP 0~1 0

MODE 0~4 0 REMOCON 0~1 0 OSTEMP AD 0~255 AD value OPC AD 0~255 AD value

TROUBLE SHOOTING TABLE

No sound or picture comes out.

LC-30HV6U

(Display)

Does the power LED light up in green.

YES

Is the Backlight off?

YES

Perform checking around IC2204.

Is the power LED blinking in red?

YES

Blinking once?

Blinking twice?

Blinking five times?

Blinking seven times?

Is "LOSS OF SYNC" displayed?

YES

Perform checking around IC2208.

YES

Is the AC cord normal?

Replace the AC cord.

To "The backlight does not go on"

Check the power unit.

Check the temperature of the set.

Check the 1-bit amplifier unit.

To "No picture comes out"

Table of monitor power LED blinking timing at the time of error occurrence

250ms 1sec

Error type

Cable error AVC-side power error Blinking once: Slow

Lamp error Blinking once: Fast

Monitor power error Blinking twice

AVC temperature error Blinking three times

AVC fan error Blinking four times

Monitor temperature error Blinking five times

Monitor fan error Blinking six times

Monitor 1-bit error Blinking seven times

LTD operation (1 cycle) H: ON

L: OFF H: ON

L: OFF

LC-30HV6U

No picture comes out.

Is the RSET terminal (pin (3)) of IC2206 set to "H"?

YES

Is the clock (91.3 MHz) applied to pin (102) of IC2206?

YES

Is the normal synchronization signal is applied to pins (97), (96) and (95) of IC2206?

YES

Check IC4903 and the ICs (IC4701, IC4702, IC4901 and IC4902) downstream from it.

Note that the unit should be replaced when the receiver IC (IC2206), HDCP key ROM (IC2208) or microprocessor (IC2004) is replaced. Applicable unit: DKEYHC094FE51

Data bit dropout (gray-scale-related)

Perform checking around X2201 connected to pin (161) of IC2206.

YES

Is X2201 connected to pin (161) of IC2206 oscillating (18.26 MHz)?

YES

Is IC2202 operating (CONFIG ROM)?

YES

IC2206 is faulty.

Check X2201 and the peripheral circuitry.

Perform checking around IC2202.

Set PATTERN1 on the adjustment process menu to "2". Is the gray scale pattern displayed correctly?

YES

Set PATTERN3 on the adjustment process menu to "1" to "3" (the QS drive test pattern is displayed). Is the gray scale displayed correctly?

YES

Set PATTERN3 on the adjustment process menu to "4". Is the test pattern displayed correctly at intervals of one dot?

YES

Set PATTERN3 on the adjustment process menu to "5". Is the test pattern displayed correctly at intervals of one dot?

YES

Perform checking between SC2201 and IC2206, between IC2206 and IC4701 or between IC2206 and IC4901.

Check the color signal in question with the gray scale test pattern. Is there a problem with the contact and resistance between IC4501 and SC4601-4604?

YES

Perform checking around IC4501 and SC4601-4604.

Perform checking around IC4702 and IC4902.

Perform checking between IC4701 and IC4501.

Perform checking between IC4901 and IC4501.

Check FFC connected to SC4601-4604.

PATTERN R, G and B become effective only when the monitor is started singly. Each can produce a solid filled screen of 256-level gray scale, which can be used for IC wire connection checking when a certain gray scale level is not produced.

Noise is caused to the moving picture when the QS drive is set to ON.

LC-30HV6U

Is OSTEMP.AD on the 3rd page of the process adjustment mode set to 255?

YES

Is the harness connected correctly between the Thermistor PWB and Inverter-4 PWB?

YES

Is the board-to-board connected correctly between the Inverter-3 PWB and Inverter-4 PWB?

YES

Is the harness connected correctly between the Monitor PWB and Inverter-3 PWB?

YES

Is the input voltage on pin (2) of IC2004 (microprocessor) 5V?

YES

TH2001 thermistor is faulty.

Check IC4701 and IC4901 and the peripheral circuitry.

Connect the harness correctly or replace it.

Connect the board-toboard securely or replace it.

Connect the harness correctly or replace it.

Pin (2) of IC2004 (microprocessor) is faulty.

LC-30HV6U

The backlight does not go on.

Is any of the fuses of F6551-F6556 blown?

YES

Check the inverter circuit downstream from the blown fuse.

Is the control signal applied to pin (8) (OFL1) and pin (9) (OFL2) of P6564?

YES

Is power supplied to Inverter PWB?

YES

Check the Lamp error detection circuit on the Inverter-GND PWB.

Check the connection of the high-voltage (pin (2)) wire on the side of the blown fuse and check that of the counterpart high-voltage (pin (2)) wire of the fluorescent lamp on the opposite side.

Is the cord connected correctly between the LCD Control PWB and Inverter PWB?

YES

Check the peripheral circuitry of IC4501 of the LCD Control PWB and check the operation of Q7701 and Q7702.

Check the 15V output on the Power PWB.

No sound comes out. (Checking with the AVC system connected)

Is power supplied to each IC on the AUDIO PWB?

YES

Is the audio signal applied to pin (7) (L-IN) and pin (9) (RIN) of P3804?

YES

Is the audio signal applied to pin (13) and pin (15) of P3803?

YES

Is the output signal from the 1-bit amplifier applied to P3903?

No No

Check if 5V is supplied to the power regulator circuit (IC3810, IC3812 and IC3816) and pin (2) of P3804.

Is the audio signal applied to pin (13) and pin (20) of SC2202 on the Monitor PWB?

YES

Perform checking around Q2012 and Q2014 and check the wire between Monitor PWB and Audio PWB.

Are the MUTE circuits (Q3804 and Q3805) operating?

Perform checking around IC2004, IC3804 and the 1bit amplifier.

NoNo

Check for the AVC System side for output.

Perform checking around IC3803 and IC3808.

YES

Check if the internal/external switching relay (RY3901) functions correctly.

The whole screen is whitish (LCD power supply)

Remove the FFCs attached to SC4101 and SC4601- SC4604 (because the panel may be broken).

YES

Check the power supplies. Check the power supplies to SC4101 and SC4102 in particular.

YES

LC-30HV6U

Is the voltage of emitter side of Q4102 about 6V?

YES

Check the input/output voltage of IC4103.

Perform checking around Q4101 and IC4101.

LC-30HV6U

CHASSIS LAYOUT (Display)

INV-GND PWB

KEY PWB

LCD CONTROL PWB

MAIN PWB

AUDIO PWB

R/C, LED PWB

87109654321

INV PWB

LC-30HV6U

SPEAKER-JACK PWB

1716 1918151413121110

LC-30HV6U

R x

)

BLOCK DIAGRAM (Display)

LCD BackLight

OFL1,2 8 x 3 x 2 8

LCD Controller

IC4501 (A725WJ) CONF FLASH CONF IC6301 CTRL RGB 8 x 3 RGB 8 x 3 (A372WJ) CPLD

IC6303 (A787WJ)

R RGB L

Lig

SDRAM (OS EVEN) QFP 208pin QFP 208pin IC4702 (A312WJ)

E2P

Power PWB (for Display)

E2P

16(data) OS Driver (EVEN) OS Driver (ODD) 16(data)

(OS EVEN) (OS ODD)

17(Address, etc) IC4701(A332WJ) IC4901(A332WJ) 17(Addr

INITIAL

ROM (128k)

IC2202 OSD

HDCP KEY

ROM (32k)

IC2208 IC2206 (SII861)

EDID

ROM (1k) ROM (8

IC2203 IC2008

TV POW

QFP 208

DVI Connector (24pin) System

SC2201 (ZA017WJ) SC2202

IC4903 CLOCK BUFFER

RGB 8 x 3 HV, DE RGB 8 x 3

DVI Receiver

in (TMDS

TMDS 2 x 4

(TMDS) (TM

• TMDS 2 x 4

• DDC 3

OSD Drive Contol, Te

E2P

87109654321

+ 80 hidden pages