Sharp LC-26GA4D, LC-26GA4U Service Manual

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LC-26GA4D LC-26GA4U

SERVICE MANUAL

MODELS

LC-26GA4D LC-26GA4U

LCD COLOR TELEVISION

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

Page

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

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

» OPERA TION MANUAL ...............................................................................................................................6

» DIMENSIONS ...........................................................................................................................................13

» REMOVING OF MAJOR PARTS..............................................................................................................14

» ADJUSTMENT PROCEDURE..................................................................................................................18

» TROUBLESHOOTING T ABLE .................................................................................................................36

» OVERALL WIRING DIAGRAM/CHASSIS LAYOUT.................................................................................46

» SYSTEM BLOCK DIAGRAM ....................................................................................................................48

» MAIN BLOCK DIAGRAM..........................................................................................................................50

» CPU BLOCK DIAGRAM ...........................................................................................................................52

» AV BLOCK DIAGRAM ..............................................................................................................................56

» POWER BLOCK DIAGRAM .....................................................................................................................58

» DESCRIPTION OF SCHEMATIC DIAGRAM ...........................................................................................62

» SCHEMATIC DIAGRAM ...........................................................................................................................63

» PRINTED WIRING BOARD ASSEMBLIES........................................................................................... 146

» PARTS LIST........................................................................................................................................... 182

» PACKING OF THE SET......................................................................................................................... 221

SHARP CORPORATION

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

S64V2LC26GA4U

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LC-26GA4D LC-26GA4U

23456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012

SAFETY NOTICE

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

å" and shaded areas in the Replacement Parts List and Schematic Diagrams. For continued protection, replacement parts must be identical to those used in the original circuit. The use of a substitute replacement parts which do not have the same safety characteristics as the factory recommended replacement parts shown in this service manual, may create shock, fire or other hazards.

CAUTION: FOR CONTINUED PROTECTION AGAINST A RISK OF FIRE REPLACE ONLY WITH SAME TYPE FUSE. F701 (3.15A, 250V), F702 (3.15A, 250V), F703 (2A, 250V), F705 (1A, DC450V), F706 (5A, 250V), F707 (5A, 250V)

WARNING

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

2. Disconnect AC power before servicing.

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 120volt AC outlet. » Using two clip leads, connect a 1.5k ohm, 10 watt

resistor paralleled by a 0.15µF capacitor in series with all exposed metal cabinet parts and a known earth ground, such as electrical conduit or electrical ground connected to an earth ground.

» Use an AC voltmeter having with 5000 ohm per volt,

or higher, sensitivity or measure the AC voltage drop across the resistor.

» Connect the resistor connection to all exposed metal

parts having a return to the chassis (antenna, metal cabinet, screw heads, knobs and control shafts, escutcheon, etc.) and measure the AC voltage drop across the resistor. All checks must be repeated with the AC cord plug connection reversed. (If necessary, a nonpolarized adaptor plug must be used only for the purpose of completing these checks.) Any reading of 0.75 Vrms (this corresponds to 0.5 mA rms AC.) or more is excessive and indicates a potential shock hazard which must be corrected before returning the monitor to the owner.

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:

DVM

AC SCALE

1.5k ohm 10W

TO EXPOSED METAL PARTS

CONNECT TO KNOWN EARTH GROUND

0.15 µF

TEST PROBE

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LC-26GA4D LC-26GA4U

PRECAUTION: POUR LA

PROTECTION CONTINUE CONTRE LES RISQUES D'INCENDIE, REMPLACER LE FUSIBLE F701 (3.15A, 250V), F702 (3.15A, 250V), F703 (2A, 250V), F705 (1A, DC450V), F706 (5A, 250V), F707 (5A, 250V)

234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121

AVIS POUR LA SECURITE

De nombreuses pièces, électriques et mécaniques, dans les téléviseur ACL présentent des caractéristiques spéciales relatives à la sécurité, qui ne sont souvent pas évidentes à vue. Le degré de protection ne peut pas être nécessairement augmentée en utilisant des pièces de remplacement étalonnées pour haute tension, puissance, etc. Les pièces de remplacement qui présentent ces caractéristiques sont identifiées dans ce manuel; les pièces électriques qui présentent ces particularités sont

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.

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.

AVERTISSEMENT

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

2. Débrancher le récepteur avant toute réparation.

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 suivante:

• Brancher le cordon d'alimentation directem-ent à une prise de courant de 120V. (Ne pas utiliser de transformateur d'isolation pour cet essai).

• A l'aide de deux fils à pinces, brancher une résistance de 1.5 kΩ 10 watts en parallèle avec un condensateur

de 0.15µF en série avec toutes les pièces métalliques exposées du coffret et une terre connue comme une conduite électrique ou une prise de terre branchée à la terre.

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

• Toucher avec la sonde d'essai les pièces métalliques exposées qui présentent une voie de retour au châssis (antenne, coffret métallique, tête des vis, arbres de commande et des boutons, écusson, etc.) et mesurer la chute de tension CA en-travers de la résistance. 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. Dans le cas contraire, il y a une possibilité de choc électrique qui doit être supprimée avant de rendre le récepteur au client.

DVM

ECHELLE CA

1.5k ohm 10W

0.15 µF

SONDE D'ESSAI

AUX PIECES METALLIQUES EXPOSEES

BRANCHER A UNE TERRE CONNUE

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LC-26GA4D LC-26GA4U

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:

2 Using lead-free wire solder

When fixing the PWB soldered with the lead-free solder, apply lead-free wire solder. Repairing with conventional lead wire solder may cause damage or accident due to cracks. As the melting point of lead-free solder (Sn-Ag-Cu) is higher than the lead wire solder by 40°C, we recommend you to use a dedicated soldering bit, if you are not familiar with how to obtain lead-free wire solder or soldering bit, contact our service station or service branch in your area.

3 Soldering

As the melting point of lead-free solder (Sn-Ag-Cu) is about 220°C which is higher than the conventional lead solder by 40°C, and as it has poor solder wettability, you may be apt to keep the soldering bit in contact with the PWB for extended period of time. However, Since the land may be peeled off or the maximum heat-resistance temperature of parts may be exceeded, remove the bit from the PWB as soon as you confirm the steady soldering condition. Lead-free solder contains more tin, and the end of the soldering bit may be easily corroded. Make sure to turn on and off the power of the bit as required. If a different type of solder stays on the tip of the soldering bit, it is alloyed with lead-free solder . Clean the bit after every use of it. When the tip of the soldering bit is blackened during use, file it with steel wool or fine sandpaper.

Be careful when replacing parts with polarity indication on the PWB silk.

Indicates lead-free solder of tin, silver and copper.

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

L Fa

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LC-26GA4D LC-26GA4U

SPECIFICATIONS

Item 26" LIQUID CRYSTAL TELEVISION,

Model: LC-26GA4U

TV Function

American TV Standard NTSC System

VHF/UHF

VHF 2-13ch, UHF 14-69ch

CATV 1-125ch

Audio multiplex BTSC System

Terminals AV in, COMPONENT in

INPUT 2

AV in, COMPONENT in

INPUT 4

HDMI in

ANTENNA 75 Unbalance, F Type for VHF/UHF/CATV in 2, out 1

INPUT 3

S-VIDEO in, AV in

OSD language

English/French/Spanish

Power Requirement

AC 120 V, 60 Hz (FOR NORTH AMERICA) AC 110-240 V, 50/60 Hz(FOR OTHERS)

Power Consumption Weight

Accessories Operation manual ( 1), Remote control unit ( 1), AC cord ( 1), "AAA" size

battery ( 2), RF cable ( 1)

TV-standard (CCIR) Receiving

Channel

Rear INPUT 1

Front

LCD panel 26" Advanced Super View & BLACK TFT LCD Number of dots 3,147,264 dots (1366 768 3 dots)

Brightness 450 cd/m

Viewing angles H : 170° V : 170° Audio amplifier 10W 2 Speakers Ø 8cm 2pcs, Ø 2.5cm 2pcs

MONITOR OUTPUT

S-VIDEO out, AV out

Headphones Ø 3.5mm jack

139W (0.4W Standby with AC 120 V)

26.5 lbs./12 kg (Display only), 34.2 lbs./15.5 kg (with Display and speaker),

40.8 lbs./18.5 kg (with Display, speaker and stand)

CENTER CHANNEL INPUT

RCA pin

4 10W (L/R)SPEAKER

INPUT 5 Audio in, DVI-I in

××

×××

××

Ω

Specifications are subject to change without prior notice.

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LC-26GA4D LC-26GA4U

OPERATION MANUAL

Part names

POWER indicator

OPC sensor

Display

POWER (On/Off)

button

INPUT

button

VOLUME buttons

(VOL-/+)

CHANNEL buttons

(CH )

Remote control sensor

*OPC: Optical Picture Control

SLEEP timer indicator

OPC indicator

Headphone jack

CARD indicator

PC CARD slot

Ù/ù

RESET*

INPUT 3 terminals

SYSTEM RESET**

Display

Antenna (A) input terminal

Antenna (B) input terminal

Antenna (A) output terminal

* Press RESET if the TV cannot return to its original state after performing various operations.

• AV MODE resets to DYNAMIC (Fixed)

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

• Twin pictur

e resets to normal

• Audio setting initializes

• Dolby virtual resets to Off

• Image position initializes

**Press SYSTEM RESET if the TV does not operate after starting up.

NOTE

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

• Pressing RESET 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 pr eset values when you forget your secret number.

DC OUTPUT

terminal

(Terminal for expanded

functionality in the near future.)

SPEAKER terminals

AC INPUT

terminal

RS-232C

terminal

INPUT 2 terminals

INPUT 1 terminals

INPUT 5 terminals

INPUT 4 terminal

CENTER CHANNEL

INPUT ter

minal

MONITOR OUTPUT terminals

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LC-26GA4D LC-26GA4U

Remote control unit

NOTE

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

115

10 24

14 29

1 TV POWER: Switch the TV power on or standby.

2 DISPLAY: Display the channel information.

3 SOURCE POWER: Turns the power of the external

equipment on and off.

4 External equipment operational buttons: Operate the

external equipment.

50 – 9: Set the channel.

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

broadcasts via the two tuners.

7VOL/ : Set the volume.

8 CARD: Switch to card mode.

Virtual: Select Virtual Dolby Surround settings.

10 EXIT: Turn off the menu screen.

11 SELECT: Select the active screen.

12 TWIN PICTURE: Set the twin picture mode.

Press again to return to normal screen.

13 SLEEP: Set the sleep timer

14 AUDIO: Select the MTS/SAP.

15 FUNCTION: Switches the remote control for TV, CBL/

SAT, VCR, DVD and AUDIO operation. Indicator lights

up for the current mode.

: When pressed all buttons on the r emote 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.

17 VIEW MODE: Select the screen size.

18 FLASHBACK: Return to the previous channel or input

external mode.

19 INPUT: Select a TV input sour

ce. (TV, INPUT 1, INPUT

2, INPUT 3, INPUT 4, INPUT 5, Card)

20 CH / : Select the channel.

21 MUTE: Mute the sound.

22 MENU: Display the menu screen.

23 ////ENTER: Select a desir ed item on the screen.

24 RETURN: Return to the previous menu screen.

25 FAVORITE CH

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

different categories.

While watching, you can toggle the selected channels

by pressing A, B, C and D.

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

normal screen.

27 CC: Display captions during closed-caption source.

EDIT:

29 AV MODE: Select an audio or video setting.

USER, DYNAMIC (Fixed), DYNAMIC. PC mode:

STANDARD, USER.)

•

(DOT)

(AV mode: STANDARD, MOVIE, GAME,

Part names

Using external equipment

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

HDMI equipment, game console and camcorder. To view external source images, select the input sour ce from

INPUT on the remote control unit or on the Display.

CAUTION

• To protect all equipment, always turn off the TV before

connecting

to a DVD player, VCR, Digital TV tuner, PC,

HDMI equipment, game console, camcorder or other

external equipment.

NOTE

•

• Please

refer to the relevant operation manual (DVD player ,

PC, etc.) car

efully before making connections.

• Each time INPUT is pressed, the input source toggles.

• Refer

to your external equipment operation manual for

the signal type.

Displaying an external equipment image

Explanation here is for the setting when connecting

DVD to INPUT1 terminal.

INPUT button

T o watch a DVD image, select "INPUT1" from "INPUT

SOURCE" menu using INPUT on the remote control

unit or on the Display.

INPUT SOURCE

INPUT1

INPUT2

INPUT3

INPUT4

INPUT5

CARD

[

Option

...

Input Select

]

Auto

COMPONENT

Video

For INPUT1 signal

Select the desired signal type.

The setting is stored and can be selected on the

"INPUT SOURCE" menu.

Press MENU and the MENU scr een displays.

Press / to select "Input Select", and then

press ENTER.

Press / to select "Option".

[

Option

...

Input Select

]

Option

Input Select

Digital Noise Reduction

Output Select

Audio Only

Quick Shoot

[Fixed]

[Auto]

[Low]

[Off]

Center Channel Input

Caption Setup

[Off]

NOTE

• If the image does not come in clearly, you may need to

change the input signal type setting on the "Input Select"

menu.

Selecting the INPUT signal

See pages for external equipment connection.

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LC-26GA4D LC-26GA4U

Using external equipment

DVD player

Connecting a DVD player

You can use the INPUT 1, INPUT 2, INPUT 4 or INPUT 5 terminals when connecting to a DVD player and other

audiovisual equipment.

Component

video cable

(commercially

available)

Audio cable

(commercially available)

AV cable (commercially

available)

DVD player

ø 3.5 mm stereo minijack cable

(commercially available)

DVI cable (Commercially available)

When using component cable.

When using composite cable.

When using DVI cable. (INPUT 5)

VCR

AV cable

(commercially available)

Connecting a VCR

You can use the INPUT 3 terminal when connecting a VCR and other audiovisual equipment.

Game console/Camcorder

S-video cable

(commercially

available)

Connecting a game console or camcorder

A game console, camcorder and some other audiovisual equipment are conveniently connected using the

INPUT 3 terminals.

NOTE

• The S-video terminal has priority over the video terminals.

AV cable

(commercially available)

S-video cable

(commercially

available)

NOTE

• The S-video terminal has priority over the video terminals.

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LC-26GA4D LC-26GA4U

Using external equipment

Digital TV STB

Connecting a Digital TV STB

You can use the INPUT 1, INPUT 2, INPUT 4 or INPUT 5 terminals when connecting a Digital TV STB and other

audiovisual equipment.

Component video cable

(commercially available)

Audio cable

(commercially available)

AV cable

(commercially available)

Digital TV STB

ø 3.5 mm stereo minijack cable

(commercially available)

DVI cable (Commercially available)

When using component cable.

When using composite cable.

When using D

VI cable. (INPUT 5)

Connecting HDMI equipment

You can use the INPUT 4 terminal when connecting an HDMI equipment.

HDMI equipment

HDMI cable

(Commercially available)

Displaying an image from HDMI equipment

To watch an HDMI equipment image, select

"INPUT4" from "INPUT SOURCE" menu

using INPUT on the remote control unit or

on the TV.

INPUT SOURCE

INPUT1

INPUT2

INPUT3

INPUT4

INPUT5INPUT5

CARD

Press MENU and the MENU scr een displays.

Press / to select "HDMI Setup", and then

press ENTER.

Press / to select "Option".

[

Option

...

HDMI Setup

]

Option

Digital Noise Reduction

Output Select

Center Channel Input

Audio Only

Quick Shoot

[Fixed]

[Off]

HDMI Setup

[Low]

[Off]

Press / to select the desired item and

press ENTER.

Press / / / to

select the desired setting

and press ENTER.

NOTE

• Refer to your external equipment operation manual for

the signal type.

Selectable items

Auto/RGB/YCbCr

4:4:4/YCbCr 4:2:2

Auto/ITU601/

ITU709

Standard/

Out of standard

Enable/Disable

HDMI Setup

items

Signal

Type

Color

Matrix

Dynamic

Range

Auto View

Description

Select the signal type from

an HDMI terminal. Unless

the image quality looks

obviously poor, select Auto.

Select the internal color

space conversion method

when an RGB signal is

input. Normally, select

Auto.

Select the signal amplitude

range. Normally, select

Standard.

Set whether or not to use

VIEW MODE based on

signal recognition,

including an HDMI signal.

Page 10

LC-26GA4D LC-26GA4U

Using external equipment

PC with DVI terminal

Connecting a PC

Use the INPUT 5 terminal to connect a PC.

ø 3.5 mm stereo minijack cable

(commercially available)

DVI cable (Commercially available)

ø 3.5 mm stereo minijack cable

(commercially available)

PC with analog RGB terminal

RGB/DVI conversion cable

(Commercially available)

Rear view

Connecting external speakers

Make sure to connect the speaker terminal and

cable polarity ( , ) properly

• The speaker terminals have plus ( ) and minus ( )

polarity.

• Plus is red and minus is black.

• The cables are also divided into plus and minus.

• When connecting the left/right speakers, be sure to

connect the plus/minus terminals with the correct cables.

NOTE

• Unplug the AC cord from the AC outlet before installing

the speakers.

CAUTION

• Make sure external speakers have 4 ohm and 10 watt

specifications.

• Connect the plus/minus terminals with the correct cables.

Incorrect connection may cause a short.

How to connect the

speaker cable

Pull up the

lid.

Insert the

edge of the

cable.

Put the lid

bac

down.

Make sure to disconnect the connected speaker

cables in advance when connecting external

speakers.

–

Page 11

LC-26GA4D LC-26GA4U

RS-232C port specifications

Return codeCommand 4-digits Parameter 4-digits

PC Control of the TV

• When a program is set, the TV 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 TV’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

Appendix

Command format

Communication procedure

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

The TV 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" returns. (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

????

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~INPUT5.

It shifts to CARD mode.

An input change is also included.

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

(Toggle)

Input terminal number (1

–5)

AUTO

VIDEO

COMPONENT

DIGITAL PC

ANALOG PC

DIGITAL AV

ANALOG AV

(Toggle)

STANDARD

MOVIE

USER

GAME

DYNAMIC (Fixed)

DYNAMIC

Volume (0–60)

AV mode. ( 10)

PC mode. (0–180)

AV mode. ( 20)

PC mode. (0–100)

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]

Zoom [PC]

Stretch [PC]

Dot by Dot [PC]

Off

OFF

OFF TIMER – 30 MIN.

The channel number of TV

The channel number of TV 1

(Toggle)

(1–125)

AUTO

POWR

ITGD

ITVD

IAVD

ICRD

INP1

INP5

INPUT SELECTION A TOGGLE

INPUT SELECTION B

AV MODE SELECTION

VOLUME

POSITION

VIEWMODE

Dolby Virtual

SLEEP TIMER

CHANNEL

ANT-A/B

DIRECT

CH UP

CH DOWN

CHANNEL

H-POSITIONH-POSITION

V-POSITION

CLOCK

PHASE

INPUT 1

INPUT 5

AVMD

VOLM

HPOS

VPOS

CLCK

PHSE

ACDV

OFTM

DCCH

CHUP

CHDW

ANTS

CLCP

WIDE

(Toggle)

AUDIO SELECTION

ACHAx _ __

OFF TIMER – 60 MIN.

OFF TIMER – 90 MIN.

OFF TIMER – 120 MIN. 4___

(Toggle)

Off

MUTE

MUT E 0

AUTO

VIDEO

COMPONENT

AUTOINP2

INPUT 2

INPUT1-5

CARD

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

Page 12

LC-26GA4D LC-26GA4U

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

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 Setup

Input Label

Parental CTRL

Position

Picture Flip

Langua

Treble

Bass

Balance

Dolb

y Virtual

Audio Only

Digital Noise Reduction

HDMI Setup

Input Select

Output Select

Quick Shoot

Center Channel Input

Caption Setup

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

Advanced

C.M.S.

Picture

Power Management

Speaker Setup

Input Signal

Auto Sync.

Input Label

Fine Sync.

Picture Flip

Language

Audio

Power Control

Setup

Treble

Bass

Balance

Dolby Virtual

Option

Audio Only

Input Select

Output Select

Quic

k Shoot

Center Channel Input

Page 13

LC-26GA4D LC-26GA4U

DIMENSIONS

Unit: inch/(mm)

315/16 (100)

(100) 5

(151)

2223/64 (568)

(321)

267/64 (663)

333/8 (848)

(206)

(493)

(201)

(407)

(95)

2023/64 (517)

243/64 (68)

1015/16 (278)

Page 14

LC-26GA4D LC-26GA4U

REMOVING OF MAJOR PARTS

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

2. Remove the terminal cover(left, right and bottom).

3. Remove the two lock screws each from the bracket cover(left and right), and detach both the bracket covers.

4. Remove the two lock screws each from the speaker(left and right), and detach both the speakers.

5. Remove the 15 lock screws from the cabinet-B, and detach the cabinet-B.

6. Remove the four lock screws from the center angle, and detach the center angle.

7. Remove the key PWB. 7-1. Remove the two lock screws from the top cover. 7-2. Remove the two lock screws from the key PWB.

8. Remove the two lock screws from the angle.

9. Remove the five screws from main PWB frame.

10. Disconnect all the connectors from all the PWBs.

Terminal Cover (L)

Terminal Cover (R)

Cabinet-A

Stand

Bracket Cover

Speaker

Bracket Cover

P151

P2002 P7706

P5706

P1903

P3701

P1902

P1900

P7200

P3700

P5702

P1901

P1904

SC3200

SC3802

SC4601

SC7200

7-1

7-2

Center Angle

Angle

KEY PWB

Top Cover

P2006

P3802

P5701

P8506

P5704

SC7201

P401

P501

P1803 P1804

P5002

SC5102

P1502

P1802

P3801

P1501

P3803

P8502

CN708

CN706

Page 15

LC-26GA4D LC-26GA4U

11. Remove the main, CPU and PC card PWBs. 1 1-1.Remove the one lock screw from flap door, and two lock screws from PWB shield, and detach the PC card

PWB.

11-2. Remove the 15 lock screws from the main PWB shield, and detach the main PWB shield and the main

PWB.

11-3. Remove the two lock screws from the frame cover, and detach the frame cover.

12. Detach the DVI PWB. 12-1. Remove the two lock screws from DVI PWB. 12-2. Remove the one lock screw, two screws and

two hexagon shaft screws from the DVI PWB, and detach the DVI PWB.

12-3. Remove the four lock screws from HDMI

shield, and detach the HDMI shield.

13. Remove the three lock screws from the cooling fan, and detach the cooling fan.

14. Disconnect all the connectors from all the PWBs.

P7708

Cooling Fan

Frame Cover HDMI Shield

Angle

Flap Door

DVI Shield

DVI PWB

PC Card PWB

PWB Shield

CPU PWB

Main PWB Shield

Main PWB

Main PWB Chassis

Frame Cover

12-1

12-2

12-3

12-2

12-3

11-1

11-3

11-2

CN7602

CN7603

CN7604

CN7605

CN7606

CN7607 CN7608

CN7601

P202

P7704

SC4651

SC4652

P7705

P7707

CN707

CN702

CN704

CN705

CN7501

CN7502

CN7503

CN7504

CN7505

CN7506

CN7507

CN7508

P2004

P3804

P5703

P3801

P3805

P1101

P6003

P101

P6001

CNA101

CNA102

Page 16

LC-26GA4D LC-26GA4U

15. Remove the seven lock screws from the AV PWB, and detach the AV PWB.

16. Remove the one lock screw from EXT-SP PWB, and detach the EXT-SP PWB.

17. Remove the six lock screws from the LCD control PWB, and detach the LCD control PWB.

18. Remove the five lock screws from the power PWB, and detach the power PWB.

19. Remove the three lock screws from the inverter-GND PWB, and detach the inverter-GND PWB.

20. Remove the four lock screws from the inverter PWB, and detach the inverter PWB.

21. Remove the two lock screws from the 1-bit AMP. PWB, and detach the 1-bit AMP. PWB.

22. Remove the four lock screws form the speaker angle(right), and detach the speaker angle(right).

23. Remove the four lock screws form the speaker angle(left), and detach the speaker angle(left).

24. Remove the four lock screws form the center angle, and detach the center angle.

25. Remove the two lock screws from the RC/LED PWB, and detach the RC/LED PWB.

26. Remove the two lock screws from the LCD panel unit ass’y, and detach the LCD panel unit ass’y.

LCD Control PWB

Inverter GND PWB

POWER PWB

AV PWB Frame

AV PWB

EXT-SP PWB

Inverter-GND PWB

1-Bit Amp PWB

Speaker Angle (L)

Speaker Angle (R)

Center Angle

R/C, LED PWB

Page 17

LC-26GA4D LC-26GA4U

27. Remove the four lock screws from the LCD panel unit, and detach the LCD panel unit.

28. Detach the reflection/deflection, prism and diffusion sheets and diffusion panel.

29. Remove the four lock screws from the lamp fixing holder, and detach the lamp fixing holer.

30. Detach the lamp unit from the lamp clip.

Lamp Holder (Top) (CHLDZA328WJ01)

Diffusion Panel (PCOVUA026WJZZ)

Diffusion Sheet

(PSHEPA166WJZZ) Prism Sheet (PSHEPA165WJZZ)

Reflection/deflection Sheet (PSHEPA164WJZZ)

Sheet Spacer-S

Sheet Spacer-A (PSPAZA484WJZZ)

Sheet Spacer-S (PSPAZA536WJZZ)

Sheet Spacer-B (PSPAZA535WJZZ)

Lamp Unit (KLMP-A026WJZZ)

Back Shield

26" LCD Panel Unit

Page 18

LC-26GA4D LC-26GA4U

ADJUSTMENT PROCEDURE

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

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

When replacing the following units, make sure to prepare the new units loaded with updated software. CPU unit: DUNTKC427FE13 DVI/HDMI unit: DUNTKC267FE24

2.Upgrading of each microprocessor software

Caution: Never "POWER OFF" the unit when software upgrade is ongoing. Otherwise the system may be damaged beyond recovery.

2-1 Software version upgrade

The model employs the following software.

» Main software » Monitor microprocessor software (Display) » Card microprocessor software

The main software and the monitor microprocessor software can be upgraded by using a general-purpose SD memory card. The card microprocessor software can be upgraded by using a PC card. The followings are the procedures for upgrading, explained separately for each of the main software, the monitor microprocessor software and the card microprocessor software.

2-2 Main software version upgrade

Get ready before you start

» SD memory card of 8MB or higher capacity » PC running on Windows 98/98SE/ME/2000/XP operating system » SD memory card reader/writer with USB connectivity and PC card adapter » SD memory card formatting software

(Downloadable at http://panasonic.jp/support/audio/sd/download/sd_formatter.html)

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LC-26GA4D LC-26GA4U

Preparations To upgrade the main software, it is necessary to get ready the SD card for version upgrade before you start.

Follow the steps below and create the SD card for version upgrade.

1 Insert the SD card into the SD card reader/writer. Start the SD card formatting software. Click [Format].

(When you have the drive options, select the drive where the SD card is inserted before you proceed.)

2 When the formatting is over, the following window appears. Click [OK].

3 Click [End] to finish the formatting.

Note: When you are done, take out the SD card once to make sure it is finished, and then insert it again.

4 Copy the binary image file KA1UAxxx.SDC (named temporarily) for version upgrade to the root directory

(folder) of the SD card drive.

Note: In the SD card drive, do not store other folders or unrelated files, or more than one binary image files for

version upgrade. Now the SD card for version upgrade is ready.

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LC-26GA4D LC-26GA4U

Program OK NG

OK NG

EEPROM

12 %

Program OK NG

OK NG

EEPROM

Ver 1.07(U 2004/04/01 2)

100 %

How to upgrade the software

1 Shut off the AC power (i.e. unplug the AC cord). 2 Insert the SD card for version upgrade (prepared as above) into the service socket located below left of the

right side cooling fan in the rear of the unit, in a way that the cut corner of the SD card comes at the righthand side.

Note: If the SD card is inserted in a wrong way, the card will go deep inside the unit beyond retrieval. Take due

care to insert the SD card correctly.

3 While depressing the SYSTEM RESET button located below the RS-232C connector in the rear left side of

the unit, turn on the AC power (i.e. plug in the AC cord).

Note: After the unit is started, you may release the SYSTEM RESET button.

4 After the unit startup, the system upgrade screen as shown below appears within 10-20 seconds.

5 Even a single failure in the process will trigger the upgrade failure screen as shown below. The word "NG"

changes to red for the item failed.

Note: In the event of a failure, repeat the upgrading process. If the process repeatedly fails, it is likely that the

hardware is troubled.

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LC-26GA4D LC-26GA4U

Program OK NG

OK NG

EEPROM

Ver 1.07(U 2004/04/01 2)

100 %

6 Upon completion of the whole process, the upgrade success screen as shown below appears. You can

check the new software version on this screen. The version information appears after the upgrade is complete.

7 Shut off the AC power to the unit (unplug the AC cord), and remove the SD card for version upgrade. 8 Now the software version upgrade is complete.

Note: When you are done with the software version upgrade, start the set, go to the top page of the adjustment

process screen and check the main software version information.

2-3 Monitor microprocessor software version upgrade

Get ready before you begin Get ready the same items as listed in the "Main software version upgrade". Preparation Create the SD card for monitor microprocessor software version upgrade in the same manner as explained in

the "Main software version upgrade". Copy the binary image file for monitor microprocessor software version upgrade to the SD card drive.

How to upgrade the software During the monitor microprocessor software version upgrade, the progress of upgrading is not shown on the

display screen. The upgrading process is seen in the blinking of the power LED.

1 Shut off the AC power to the unit (i.e. unplug the AC cord). 2 Insert the SD card for version upgrade (prepared as above) into the service socket located below left of the

right side cooling fan in the rear of the unit, in a way that the cut corner of the SD card comes at the righthand side.

Note: If the SD card is inserted in a wrong way, the card will go deep inside the unit beyond retrieval. Take due

care to insert the SD card correctly.

3 While depressing the SYSTEM RESET button located below the RS-232C connector in the rear left side of

the unit, turn on the AC power (i.e. plug in the AC cord).

Note: After the unit is started, you may release the SYSTEM RESET button.

Caution!! The moment this operation is done, the upgrading of the monitor microprocessor software starts. While the upgrade is ongoing, never power off the unit. Otherwise the upgrade will fail and the system may have a serious damage beyond recovery (inability to start).

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LC-26GA4D LC-26GA4U

4 After the unit startup, the power LED starts blinking in green within 10-20 seconds. 5 Wait until the power LED stops blinking, the unit restarts automatically, and the normal startup screen

appears (it will take 2-3 minutes).

6 Shut off the AC power to the unit (unplug the AC cord), and remove the SD card for version upgrade. 7 Now the software version upgrade is complete.

Note: When you are done with the software version upgrade, start the set, go to the top page of the adjustment

process screen and check the monitor microprocessor software version information.

2-4 Card microprocessor software version upgrade

Get ready before you start * CF (Compact Flash) of 8MB or higher capacity

* PCMCIA adapter for CF * PC with PCMCIA slot running on Windows 98/98SE/ME/2000/XP operating system

Creating the PC card for version upgrade

Formatting the PC card

1 Insert the PC card into the PC card slot. 2 Open [My Computer] window, choose the relevant drive (e.g. H drive) and right-click it. 3 Select [Format] in the menu. 4 Under the file system, there are [FAT32] and [FAT] options. Select [FAT], and click [Start]. 5 A dialog box requesting your confirmation appears. Click [OK]. 6 Wait until the formatting is over. Then click [OK].

After this, click [Close].

Creating a new "boot" folder directly under the card root directory

1 * Create H:¥boot if the card is in H:¥drive. 2 Click [File], point to [Rename], and click [Folder]. 3 Rename the folder as [boot].

Copying the version upgrade file to the PC card

Using a drag-and-drop action, copy the "aqb5cu.img" (temporarily named) file for version upgrade to the "boot" folder.

Removing the PC card

1 Click [Safely removing hardware] in the task bar, select [PCMCIA IDE/ATAPI Controller], and click [Stop]. 2 Select PC card in [Stop hardware device], and click [OK]. 3 After confirming that you can safely remove the hardware, remove the PC card.

Now the PC card for version upgrade is ready.

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LC-26GA4D LC-26GA4U

How to upgrade the software When you are done with the version upgrade, check the software version information in the adjustment process

mode. 1 Turn off the power. Insert the PC card into the slot of the set, which was prepared in the above "Creating

the PC card for version upgrade".

2 Turn on the power. 3 Wait until the process ends (about 2 minutes). Entering the card mode is not necessary.

* In case the card mode is entered, nothing appears on the screen for about 50 seconds after power-on.

"Card error" is displayed on the screen.

The action has ended successfully when the display is replaced by "Loading from the card".

*If the action has failed, turn off the power and repeat the steps 1 thru 3.

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LC-26GA4D LC-26GA4U

3.Entering and exiting the adjustment process mode

(1) Before entering the adjustment process mode, press the "TV RESET" button or execute the AV position

RESET in the video adjustment menu.

(2) While holding down the "VOL (–)" and "INPUT" keys at a time, press the POWER switch of the main unit to

turn on the power. (The "VOL (–)" and "INPUT" keys should be pressed and held until the display appears.) The letter “K” appears on the screen.

(3) Next, hold down the "VOL (–)" and "CH (Ù)" keys at a time.

Multiple lines of blue characters appearing on the display indicate that the unit is now in the adjustment process mode. When you fail to enter the adjustment process mode (the display is the same as normal startup), retry the procedure.

(4) To exit the adjustment process mode after the adjustment is done, unplug the AC cord from the outlet to

make a forced shutdown. (When the power was turned off with the remote controller, once unplug the AC cord and plug it again. In this case, wait 10 seconds or so before plugging.)

Caution: Use due care in handling the information described here lest your users should know how to enter the adjustment process mode. If the settings are tampered in this mode, unrecoverable system damage may result.

4.Remote controller key operation and description of display in adjustment process mode

(1) Key operation

Remote controller key Main unit key Function CH (Ù/ù) CH (Ù/ù) Moving an item (line) by one (UP/DOWN) VOL (+/–) VOL (+/–) Changing a selected item setting (+1/–1) Cursor (UP/DOWN) Turing a page (PREVIOUS/NEXT) Cursor (LEFT/RIGHT) Changing a selected line setting (+10/–10) INPUT Input switching (toggle switching)

(TV→INPUT1→INPUT2→INPUT3→INPUT4→ INPUT5→CARD)

ENTER Executing a function

* Input mode is switched automatically when relevant adjustment is started so far as the necessary input

signal is available.

(2) Description of display

(1) Current page /

Total pages

(2) Current page title

(3) Currently selected input

(4) Current color TV system

(5) Destination

Adjustment process menu header

(7) Parameters

MAIN Version CARD Version

Monitor Version EQ DATA CHECKSUM

STANDBY CAUSE FAN STATUS

1.XX( J 2004/XX/XX X )

1.XX

3.XX

A15E

ROTATE

N358

USA

TUNER

1/15

[INFO]

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LC-26GA4D LC-26GA4U

5. List of adjustment process mode menu

The character string in brackets [ ] will appear as a page title in the adjustment process menu header.

Page Line Item Description Remarks (adjustment detail, etc.)

1 [INFO]

1 MAIN Version

Main microprocessor version

Version display 2 CARD Version Card unit version Card unit microprocessor software version 3 Monitor Version Monitor version Obtained from the monitor. (Displays panel size and type as well.) 4 EQ DATA CHECKSUM Audio data checksum Audio data checksum display 5 STANDBY CAUSE Standby cause Last status which caused standby 6 FAN STATUS Fan

2 [INIT]

1 INDUSTRY INIT

Initialization to factory settings

Initialization to factory settings 2 HOTELMODE Hotel mode settings 3 Center Acutime

Accumulated AVC operation time

Reset by initialization 4 RESET Reset 5 BacklightAcutime

Accumulated monitor operation time

Not reset by initialization 6 RESET Reset 7 VIC XPOS 8 VIC YPOS 9 VIC COLOR

10 VIC SIGNAL_TYPE 11 VIC READ

3 [N358MAIN]

1 N358 ALL ADJ N358MAIN+SUB+TUNER Auto N358 Main, Sub and Tuner DAC adjustments 2 N358 MAIN ADJ Auto ALL Auto N358 Main video adjustment 3 N358 SUB ADJ Auto ALL Auto N358 Sub video adjustment 4 TUNER DAC ADJ IC400 5 N358 MAIN CONTRAST IC400 Contrast 6 N358 MAIN Cb GAIN IC400 Cb gain 7 N358 MAIN Cr GAIN IC400 Cr gain 8 N358 SUB CONTRAST IC500 Contrast 9 N358 SUB Cb GAIN IC500 Cb gain

10 N358 SUB Cr GAIN IC500 Cr gain 11 TUNER A DAC TUNER-A DAC Tuner DAC 12 TUNER B DAC TUNER-B DAC Tuner DAC

4 [N358SUB]

TUNER VCHIP TEST(69ch)

Auto ALL 2 N358 SUB CONTRAST IC500 N358 Sub video contrast 3 N358 SUB Cb GAIN IC500 Cb gain 4 N358 SUB Cr GAIN IC500 Cr gain 5

TUNER VCHIP TEST(10ch)

TUNER VCHIP TEST(15ch)

5 [COMP15KMAIN]

1 COMP15K ALL ADJ Auto ALL Auto COMP15K Main + Sub adjustments 2 COMP15KAD MAIN ADJ Auto ALL Auto COMP15K Main video adjustment 3 COMP15K MAIN ADJ Auto ALL 4

COMP15K MAIN CONTRAST

IC400 Contrast 5 COMP15K MAIN Cb GAIN IC400 Cb gain 6 COMP15K MAIN Cr GAIN IC400 Cr gain 7 COMP15K Y OFFSET 8 COMP15K Cb OFFSET 9 COMP15K Cr OFFSET

COMP15K SUB CONTRAST

IC500 Contrast

11 COMP15K SUB Cb GAIN IC500 Cb gain 12 COMP15K SUB Cr GAIN IC500 Cr gain

6 [COMP15KSUB]

1 COMP15K SUB ADJ Auto ALL Auto COMP15K Sub video adjustment 2

COMP15K SUB CONTRAST

IC500 Contrast 3 COMP15K SUB Cb GAIN IC500 Cb gain 4 COMP15K SUB Cr GAIN IC500 Cr gain

7 [HDTV]

1 HDTV ADJ Auto HDTV video adjustment 2 CONTRAST IC3700 Contrast 3 Cb GAIN IC3700 Cb gain 4 Cr GAIN IC3700 Cr gain 5 HDTV Y OFFSET 6 HDTV Cb OFFSET 7 HDTV Cr OFFSET

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LC-26GA4D LC-26GA4U

8 [DVI ANALOG]

1 DVI ANALOG Auto DVI analog video adjustment 2 R CUTOFF IC3700 3 G CUTOFF IC3700 4 B CUTOFF IC3700 5 R DRIVE IC3700 6 G DRIVE IC3700 7 B DRIVE IC3700

9 [DVI DIGITAL]

1 DVI DIGITAL Auto DVI digital video adjustment 2 CONTRAST IC3700 Contrast 3 R CUTOFF 4 G CUTOFF 5 B CUTOFF 6 R DRIVE 7 G DRIVE 8 B DRIVE

10 [M GAMMA]

1 MONITOR R GAMMA LO Monitor W/B adjustment 2 MONITOR G GAMMA LO 3 MONITOR B GAMMA LO 4 MONITOR R GAMMA HI 5 MONITOR G GAMMA HI 6 MONITOR B GAMMA HI 7 GAMMA WRITE Writing in monitor gamma table 8 GAMMA RESET Reset of monitor gamma table

11 [M GAMMA R]

1 MONITOR R GAMMA 1 2 MONITOR R GAMMA 2 3 MONITOR R GAMMA 3 4 MONITOR R GAMMA 4 5 MONITOR R GAMMA 5 6 MONITOR GAMMA 6 7 GAMMA WRITE 8 GAMMA RESET

12 [M GAMMA G]

1 MONITOR G GAMMA 1 2 MONITOR G GAMMA 2 3 MONITOR G GAMMA 3 4 MONITOR G GAMMA 4 5 MONITOR G GAMMA 5 6 MONITOR B GAMMA 6 7 GAMMA WRITE 8 GAMMA RESET

13 [M GAMMA B]

1 MONITOR B GAMMA 1 2 MONITOR B GAMMA 2 3 MONITOR B GAMMA 3 4 MONITOR B GAMMA 4 5 MONITOR B GAMMA 5 6 MONITOR B GAMMA 6 7 GAMMA WRITE 8 GAMMA RESET

14 [PATTERN]

1 CVIC PATTERN

CVIC-generated internal pattern display

CVIC internal pattern display

2 GPU PATTERN

SEINE-generated internal pattern display

SEINE internal pattern display

15 [ETC]

1 EEP SAVE

Storage of adjustment value

Saving adjustment value in storage area

2 EEP RECOVER

Retrieval of adjustment value

Retrieving adjustment value from storage area

3 CARD REC INPUT

Permission of card recording by external input source

4 STANDBY CAUSE RESET

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LC-26GA4D LC-26GA4U

6. Special features

* STANDBY CAUSE (Page 1/15)

Display of a cause (code) of the last standby The cause of the last standby is recorded in EEPROM whenever possible. Checking this code will be useful in finding a problem when you repair the troubled set.

* EEP SAVE (Page 15/15)

Storage of EEP adjustment value

* EEP RECOVER (Page 15/15)

Retrieval of EEP adjustment value from storage area

7. Video signal adjustment procedure * Adjustment process mode menu is listed in section 5.

(1) Signal check

Signal generator level adjustment check (Adjustment to the specified level)

» Composite signal : 0.714Vp-p ± 0.02Vp-p (Pedestal to white level) » 15K component signal : Y level : 0.714Vp-p ± 0.02Vp-p (Pedestal to white level)

PB, PR level

: 0.7Vp-p ± 0.02Vp-p

» 33K component signal : Y level : 0.714Vp-p ± 0.02Vp-p (Pedestal to white level)

PB, PR level

: 0.7Vp-p ± 0.02Vp-p

» DVI-I (analog RGB) signal : RGB level : 0.714Vp-p ± 0.02Vp-p (Pedestal to white level)

(2) Entering the adjustment process mode

Enter the adjustment process mode according to the steps described in section 3.

(3) N358 composite signal adjustment (Main, Sub and Tuner)

Adjustment item Adjustment conditions Adjustment procedure

1 Adjustment N358 signal

US-10ch

2 Auto adjustment Page 3/15

performance

Feed the NTSC split field color bar signal (75% color saturation) to INPUT 1 input. Feed the RF signal (by use of US-10ch) to TUNER-A and TUNER-B.

Bring the cursor on [ËN358 ALL ADJ] and press [ENTER]. [ËN358 ALL ADJ FINISH] appears when finished.

[Video input signal] [US-10CH]

↑100% white ↑100% white

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LC-26GA4D LC-26GA4U

Adjustment item Adjustment conditions Adjustment procedure

1 Adjustment 480i signal

2 Auto adjustment Page 5/15

performance

Feed the 100% color bar signal to VIDEO 1 component input.

Bring the cursor on [ËCOMP 15K ALL ADJ] and press [ENTER]. [ËCOMP 15K ALL ADJ FINISH] appears when finished.

(4) Component 15K signal adjustment (Main and Sub)

↑100% white

Adjustment item Adjustment conditions Adjustment procedure

1 Adjustment 1080i signal

2 Auto adjustment Page 7/15

performance

Feed the 100% color bar signal to VIDEO 1 component input.

Bring the cursor on [ËHDTV ADJ] and press [ENTER]. [ËHDTV ADJ FINISH] appears when finished.

(5) Component 33K signal adjustment

↑100% white

Adjustment item Adjustment conditions Adjustment procedure

1 Adjustment DVI-I (analog)

2 Auto adjustment Page 8/15

performance

Feed the 100% white 1/2 window pattern signal to DVI-I (analog) input.

Bring the cursor on [ËDVI ANALOG ADJ] and press [ENTER]. [ËDVI ANALOG ADJ FINISH] appears when finished.

(6) DVI-I (analog) signal adjustment

100% White

0% Black

1/4

1/2

1/4

1/2

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LC-26GA4D LC-26GA4U

Adjustment item Adjustment conditions Adjustment procedure

1 Adjustment DVI-I (digital)

2 Auto adjustment Page 9/15

performance

Feed the 100% white 1/2 window pattern signal to DVI-I (digital) input.

Bring the cursor on [ËDVI DIGITAL ADJ] and press [ENTER]. [ËDVI DIGITAL ADJ FINISH] appears when finished.

(7) DVI-I (digital) signal adjustment

8. White balance adjustment

Start the set and perform a white balance adjustment on the display.

» Procedure » Bring up the adjustment screen (High side: 200 gradations, Low side: 48 gradations). » Adjust [R GAMMAL], [G GAMMAL] and [B GAMMAL] so that 48-gradation pattern becomes normal.

* Adjust the chromaticity of the Low pattern (on the right of the display) so that it is set to x=0.284 and

y=0.292. » Adjust [R GAMMAH], [G GAMMAH] and [B GAMMAH] so that 200-gradation pattern becomes normal. * Adjust the chromaticity of the High pattern (on the left of the display) so that it is set to x=0.284 and

y=0.292.

9. Initialization to factory settings

Caution: When initialization is performed, all user setting data including the channel settings are initialized. Be cautious when making this adjustment.

(The adjustments done in the adjustment process mode are not initialized.)

Adjustment item Adjustment conditions Adjustment procedure

1 Initialization

Enter the adjustment process mode. Bring the cursor on to [INDUSTRY INIT] in page 2/15. Set to [ON] using [VOL] key, and press [ENTER] to execute the initialization. When the initialization is complete, the adjustment process mode screen is automatically replaced by the TV's 1ch screen. * Never shut off the power during the initialization process.

The following settings are initialized in this adjustment.

1. User setting

2. Channel data (e.g. broadcast frequencies)

3. Password data

4. Operation time

5. Maker's optional setting

6. Auto installation flag

7. V-CHIP block setting

After the adjustment, cancel the adjustment process mode. To exit the adjustment process mode, unplug the AC cord from the outlet to make a forced shutdown. (When the power was turned off with the remote controller, once unplug the AC cord and plug it again. In this case, wait 10 seconds or so before plugging.)

100% White

0% Black

1/4

1/2

1/4

1/2

Page 30

LC-26GA4D LC-26GA4U

10. Display adjustment procedure

1. Adjusting procedure Entering the adjustment process mode → COM BIAS adjustment

2. Entering and exiting the adjustment process mode (1) Before entering the adjustment process mode, press the "TV RESET" button or execute the AV position

RESET in the menu video adjustment.

(2) While holding down the "VOL (+)" and "CH (Ù)" keys at a time, press the "POWER" key of the main

unit to turn on the power. (The "VOL (–)" and "INPUT" keys should be pressed and held until the display appears.) The letter "K" appears on the screen.

(3) Next, press the remote controller key (VOL, CH, etc.).

Multiple lines of red characters appearing on the display indicate that the unit is now in the adjustment process mode. When you fail to enter the adjustment process mode (the display is the same as normal startup), retry the procedure.

(4) To exit the adjustment process mode after the adjustment is done, unplug the AC cord from the outlet to

make a forced shutdown. (When the power was turned off with the remote controller, once unplug the AC cord and plug it again. In this case, wait 10 seconds or so before plugging.)

3. Adjustment process mode key operation table

Key Function 1 (when on the left side of a page) Function 2 (when changing a numeric value)

Cursor UP

Cursor DOWN

Cursor RIGHT

Cursor LEFT

ENRER INPUT CH_UP

CH_DOWN

VOL_UP

VOL_DOWN

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 patterm off Moving to the next 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)

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

Moving to the left by one item

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

Moving to the left by one item

Page 31

LC-26GA4D LC-26GA4U

4. COM BIAS adjustment 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 pattern. Make an adjustment so that the flicker near the center of the screen is minimized.

Adjusting procedure by use of [RS-232C]

» Get ready the PC with COM port (RS-232C) running on Windows 95/98/ME/2000/XP operating system,

as well as the RS-232C cross cable.

» Start the unit with the RS-232C cable connected. » Start the terminal software. (The freeware readily available on the Internet will do.) » Make the following settings.

Baud rate 9600 Data 8 bits Parity None Stop bit 1 bit Flow control Not implemented

» If the settings are correct, the terminal software indicates "ERR" against pressing of the "ENTER" key. » After the settings are done correctly, it is possible to make an adjustment by typing in the command

shown in the table below and pressing the "ENTER" key on the keyboard.

Command entry is successful if the terminal software indicates "OK" when the "ENTER" is pressed. If "ERR" is shown, retry to enter the command.

RS232C command table

Command Function Remarks

MSET1001

MOFR**** MOFG**** MOFB**** MGAR**** MGAG**** MGAB**** MINF0000 MINF0001 MINF0002

Starting the white balance adjustment

Adjusting the R GAMMA L value Adjusting the G GAMMA L value Adjusting the B GAMMA L value Adjusting the R GAMMA H value Adjusting the G GAMMA H value Adjusting the B GAMMA H value Displaying the R GAMMA table Displaying the G GAMMA table Displaying the B GAMMA table

Ending the adjustment with a numeric value other than 1001

Range: 0000~0255 Range: 0000~0255 Range: 0000~0255 Range: 0000~0255 Range: 0000~0255 Range: 0000~0255

Page 32

LC-26GA4D LC-26GA4U

5. Lamp error detection 5-1. 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 when 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 six seconds after it is turned ON. (The power LED on

the front of the TV turns red from green and keeps blinking in red (ON for 240ms and OFF for 1sec)).

2 If occurs five times consecutively, it becomes impossible to turn ON the power. (The power LED keeps

blinking in red (ON for 240ms and OFF for 1sec)).

5-2. Measures

1) Checking with lamp error detection OFF While the POWER switch is off, hold down the "CH (Ù)" and "VOL (+)" keys and then turn the POWER switch on. The display will run in the "Display process mode" ("<K>" will appear). If there is a problem with a lamp or a lamp circuit, the lamp will go out. (The power LED is green.) Then, you can check the operation to see if the lamp and lamp circuit are abnormal.

2) Resetting the lamp error count After you have finished checking whether the lamp and lamp circuit are abnormal, reset the lamp error count. If a lamp error is detected five consecutive times, the power cannot be turned on. Therefore, move to the [L ERR RESET] line, the 5th line on the first page of the "Display process mode", using the Cursor UP/DOWN key. Then, reset the [L ERR RESET] value using the Cursor RIGHT/LEFT key. In this case, press the Cursor UP/DOWN key to reset it to "0".

Table of contents of adjustment process mode Page 0

0123456789ABCDEF

0SERVI CE I 26GA4

→

1 GRAYLEVEL 100 2 COMBIAS 200

Values specific to each display 3 VLSBIAS 041 4 L ERR RESET 5

Reset to "0

" 5LCD 6PATTERN 7 MOTOR AND FAN 8OTHER 9 VER M203

After resetting to "0", perform an operational check to ensure that the lamp error detection feature is not activated.

Page 33

LC-26GA4D LC-26GA4U

6. List of adjustment process modes (Display) (Examples)

Table of contents of adjustment process mode Page 0

0123456789ABCDEF

0SERVI CE I 26GA4

→

1 GRAYLEVEL 100 2 COMBIAS 200 3 VLSBIAS 041 4 L ERR RESET 0 5LCD 6PATTERN 7 MOTOR AND FAN 8OTHER 9 VER M203

LCD Page 1 LCD Page 4

LCD Page 5

LCD Page 6

0123456789ABCD 0123456789ABCD

0LCD1 0 LCD4

→

1MODE PC0

→

1OPC 2OPC

3OPC 4OPC 5OPC 6OPC 7OPC 8OPC

2PWMCTRL 3 3 PWMFREQ 1279 11

4 PWMDUTY1 0116 12 53 5 PWMDUTY2 0116 13 58 6 PHASEDIF 000 14

15 16

62 62 74

7PCLK1 0 8PCLK2 0 9 9

LCDPage 2

0123456789ABCD 0123456789ABCD

0LCD2 0 LCD5

→

1MODE PC0

→

1 VH0 0166 2 QS SW 2 VL0 0941 3 QS D1 084

3 VH31 0417 4 QS D2 096 4 VL31 0694 5 QS D3 106 5 VH63 0473 6 QS D4 118 6 VL63 0621 7 QS D5 132 7 VH95 0509 8 QS D6 147 8 VL95 0503 9 QS D7 162 9

LCD Page 3

0123456789ABCD 0123456789ABCD

0LCD3 LCD6

→

1OPC0 00

05 09 13 18 22 27 31 36 9

→

0535

2OPC1

VL127 VL127 0550

3 OPC 2 VH159

VH191

VH247

0581 4 OPC 3 VL159 0495 5OPC4 0627 6 OPC 5 VL191 0443 7OPC6 0795 8 OPC 7 VL247 0153 9OPC8

0 1 2 3 4 5 6 7 8

Page 34

LC-26GA4D LC-26GA4U

PATTERN Page1 OTHER Page 1

0123456789ABCD 0123456789ABCD 0PATTERN1 OTHER1 1PATTERN1 00

1CLRMODE 0 2PATTERN2 00 W0 3 PATTERN3 00 LCD DATA 0000 4PATTERN4 00

2 3 4R0W0

R0W0

5 5 EEP C 0000000 6 6

2 3

4 5 6

7 7 8 8 9 9

PATTERN Page 2 OTHER Page 2

0123456789ABCD 0123456789ABCDEF 0PATTERN2 OTHER2 26GD1 1 RESERVE 0 1 ERR STOP 0 2 RESERVE 0 MODEL 0 3 EMOCON 0 4 5 STEMP AD 106 6 PC AD 208 7 8 9

MOTOR FAN Page 1 OTHER Page 3

0123456789ABCD 0123456789ABCD 0MOTOR FAN OTHER3 1 RESERVE 0 1TIMEOUTON 1 2 RESERVE 0 IO70 10000111 3 RESERVE 0 IO72 11001110 4 RESERVE 0 000000000000 5 RESERVE 0 040330101147 6 RESERVE 0 ETC 201221010 7 FAN START 224 7 RAM EEP 4A 00 8 FAN STOP 230 8 MICOM 00 0000 9T

0 1 2 3 4 5 6 7 8 9EMP ERR 055 9

Page 35

LC-26GA4D LC-26GA4U

First layer Page Item Setting range Initial value

Table of contents 1 GRAYLEVEL 0 ~ 255 25

COM BIAS 0 ~ 255 126

VLS BIAS 0 ~ 255 23

L ERR RESET Totally 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

PHASEDIF 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 ~ 255 135 OS D5 0 ~ 255 167 OS D6 0 ~ 255 174 OS D7 0 ~ 255 179

3 OPC 0 0 ~ 85 0

OPC 1 0 ~ 85 11 OPC 2 0 ~ 85 21 OPC 3 0 ~ 85 30 OPC 4 0 ~ 85 38 OPC 5 0 ~ 85 45 OPC 6 0 ~ 85 51 OPC 7 0 ~ 85 56 OPC 8 0 ~ 85 61

4 OPC 9 0 ~ 85 66

OPC 10 0 ~ 85 70 OPC 11 0 ~ 85 73 OPC 12 0 ~ 85 76 OPC 13 0 ~ 85 79 OPC 14 0 ~ 85 81 OPC 15 0 ~ 85 83 OPC 16 0 ~ 85 85

5 VH 0 0 ~ 1023 124

VL 0 0 ~ 1023 904 VH 1 0 ~ 1023 359 VL 1 0 ~ 1023 598

VH 20 0 ~ 1023 397

VL 20 0 ~ 1023 579

VH 47 0 ~ 1023 416

VL 47 0 ~ 1023 551

6 VH 63 0 ~ 1023 454

VL 63 0 ~ 1023 517

VH 95 0 ~ 1023 485

VL 95 0 ~ 1023 486

VH 127 0 ~ 1023 538

VL 127 0 ~ 1023 538

VH 191 0 ~ 1023 1022

VL 191 0 ~ 1023 122

Page 36

LC-26GA4D LC-26GA4U

TROUBLE SHOOTING TABLE

YES

No power supply (Front LED is off) or no power-up (Front LED does not change from red to green)

Is power cable properly connected to the main unit?

Is BU+5V line (pin (16) of CN706, pin (8) of CN707 and pin (4) of CN708) normal?

Is there any defective part or short-circuit in BU+5V line?

Check the 15V line power circuits (T701, T702, F704, Q706-14, PC703-4, D708-17, IC702, L710, Q733-6, D735-6, D780 and IC706).

Check each DC/DC converter and line (IC707-11 and IC716). Replace if necessary.

Remove the defective part or short-circuit, and repeat the check.

Is the voltage (approx. 380V) available at C709/C710 when the power is turned on?

Is the voltage available in 15V line immediately after the power is turned on?

Is each DC/DC converter output (IC707-711 and IC716) normal?

Reconnect the wire harness, FFC, etc. in the set properly, and repeat the check.

Check the 380V line power circuits (L703, IC701, Q701-5, D706 and TH 701).

Connect the power cable properly, and turn on the power.

Is F701 normal?

Replace F701, and turn on the power. If the fuse is still blown, replace VA701, VA702, D701, D702, L703, Q701, Q702 and IC701. Then repeat the check.

Check the BU+5V line power circuits (F703, D722, IC703, T703, PC702, D761, and IC715).

Are the wire harness, FFC, etc. in the set connected properly?

• Power switch: Top panel (Main) Power (DC cutoff: Detected by microprocessor) [Scheme of power supply system]

[(Main) Power OFF sequence]

1) (Main) Power OFF (DC switch)

2) (Main) Power shutoff is detected by the monitor microprocessor port.

3) Standby request (power cord) is sent to Seine from the microprocessor.

4) Seine shutdown process

5) Reception of shutdown permission from Seine

6) Monitor microcomputer turns off the relay to enter the standby mode.

(Main) Power

Seine

Main

Relay

Monitor microprocessorBackup

Page 37

LC-26GA4D LC-26GA4U

TROUBLE SHOOTING TABLE (Continued)

No headphone audio output

No monitor audio output

YES

No Sound (1)

No Sound (2)

Check between pins (26), (27) (OUT L/R) of IC2702 and HP AMP (IC2502), audio mute (Q2501) and headphone terminal (J2402), as well as their peripheral circuits.

Check the headphone plug circuit. Check between headphone (pin (4) of J2402) and pin (7) of IC1102.

YES

Check if monitor audio output is set to "variable" or if headphone is connected.

Is there normal audio output in IC2501 (Multi Sound Processor)? Check pins (37) and (36) (SC1 OUT L/R) of IC2501.

YES

Check between pins (37), (36) (SC1 OUT L/R) of IC2501 (Multi Sound Processor) and pins (5), (3) of IC2504 (EQ AMP). Is there normal audio output for each?

YES

Check between pins (5), (3) of IC2504 (EQ AMP) and pins (6), (3) of monitor audio output terminal (J1105), namely Q1102 and Q1103.

No audio output during UHF/VHF reception

YES

Is the volume icon set on speaker when volume key is operated?

Is there normal signal input at pins (67) (SOUND IF1) and (69) (SOUND IF2) of IC2501 (Multi Sound Processor)?

YES

Are there normal audio outputs from pins (34) and (33) (SC2 OUT L/R) of IC2501 toward pins (32) and (33) of IC2702 (DIR)?

If monitor output is set to "variable" in the menu, change the setting to "fixed".

Is there normal SIF output from tuner? (Pin (7) of TU1101 and TU1102)

YES

Are there normal audio outputs at pins (28) and (29) (A-OUT L/R) of IC2702?

YES

Is relay switching done normally from AV PWB P6003 to RY6001 (speaker switch)?

Are there normal I/O signals of LRCK, BICK, SDTO and SDTI between IC2702 and IC2700 (DSP)?

YES

Are the 1-bit amplifier signals supplied to each pin of P8003?

Check 1-bit amplifier and the peripheral circuits.

YES

Are there normal audio outputs from pins (28) and (29) of IC2702 toward pins (13) and (15) of P3801 (1-bit amplifier input)?

Check the circuits from pins (28) and (29) of IC2702 to pins (13) and (15) of P3801 (1-bit amplifier input), (IC3802 and Q3805-6).

YES

Check TU1101/1102 (U/V tuner) and the peripheral circuits.

Check IC2702 and the peripheral circuits.

Check between pins (34), (33) (SC2 OUT L/R) of IC2501 and pins (32), (33) of IC2702 DIR).

Page 38

LC-26GA4D LC-26GA4U

TROUBLE SHOOTING TABLE (Continued)

YES

No Picture (1)<Composite video signal> input

External input in trouble <INPUT 1>

Is INPUT 1 selected in the input select menu

screen?

Is composite video signal detection

functioning normally? Check between pin

(11) of J1101 and pin (9) of IC1102.

Check between pin (8) of J1101 and pin (65)

of IC3800.

Select Video 1 and the input signal in the input

select menu screen.

If signal name is gray and not selectable in

the menu screen

Is composite video signal detection

functioning normally? Check between pin

(10) of J1101 and pin (11) of IC1102.

Check between pin (9) of J1101 and pin (71)

of IC3800.

Check IC3800 (AV SWITCH) and the

peripheral circuits.

Select INPUT 2 and the input signal in the

input select menu screen.

If signal name is gray and not selectable in

the menu screen

Is there video signal input at pin (65) of

IC3800 (AV SWITCH)?

Is there video signal input at pin (85) of

IC400 (MAIN VIDEO CHROMA)?

Are there digital video signal outputs at pins

(43), (44), (46)~(49), (54), (55) and (58) of

IC400?

Are there digital video signal inputs at pins (53), (54), (57)~(60), (51), (52) (RE0-7), pins(63)~(68), (61), (62) (GE0-7), pin

s (73)~(78), (69),

(70) (BE0-7), pins (81)~(86), (79), (80) (RO0-7), pins (91)~(96), (89), (90) (GO0-7), pins (99), (100), (1), (2), (5), (6), (97

), (98) (BO0-7), and

pins (7)~(10) (HSYNC, VSYNC, DE, CLKIN) of IC3201 (LVDS TRANSMITTER)?

Are there digital video signal outputs at pins (49)(TA1

–), (48)(TA1+), (47)(TB1

–), (46)(TB1+), (44)(TC1

–), (43)(TC1+),(41)(TCLK

–),

(42)(TCLK+), (40)(TD1

–), (39)(TD1+), (37)(TA2

–), (36)(TA2+), (35)(TB2

–), (34)(TB2+), (32)(TC2

–), (31)(TC2+), (30)(TCLK2

–),(29)(TCLK2+),

(28)(TD2–), and (27)(TD2+) of IC3201?

Is INPUT 2 selected in the input select menu

screen?

Is there video signal input at pin (71) of

IC3800 (AV SWITCH)?

Are there MAIN VIDEO signal output at pin (60) of IC3800 and SUB VIDEO signal output at pin (56)?

Are there video signal input at pin (2) of IC401 (MAIN L.P.F.) and at pin (2) of IC501 (SUB L.P.F.)?

External input in trouble <INPUT 2>

Check between IC3800 and IC401/IC501.

Check between IC401 and IC400.

Is there video signal input at pin (85) of

IC500 (SUB VIDEO CHROMA)?

Check between IC501 and IC500.

Check IC 400 (MAIN VIDEO CHROMA)

and the peripheral circuits.

Are there digital video signal outputs at pins

(43), (44), (46)~(49), (54), (55) and (58) of

IC500?

Check IC500 (SUB VIDEO CHROMA) and

the peripheral circuits.

Replace the main PWB, or check between

IC400/IC500 and IC3201.

Check IC3201 (LVDS TRANSMITTER) and

the peripheral circuits.

Check the LCD CONTROL PWB.

Page 39

LC-26GA4D LC-26GA4U

TROUBLE SHOOTING TABLE (Continued)

YES

External input in trouble <INPUT 3>

Is INPUT 3 selected in the input select

menu screen?

Is there signal input at each input pin of

IC3800 (AV SWITCH)?

Is there signal input at pin (3)?

<S-video signal input>

Are there Y-signal input at pin (5) and C-

signal input at pin (7)?

Select INPUT 3 and the input signal in the

input select menu screen.

If signal name is gray and not selectable in

the menu screen

Is composite video signal detection

functioning normally? Check between pin

(11) of J1106 and pin (12) of IC1102.

Is S-video signal detection functioning

normally? Check between pin (6) of

SC1105 and pin (6) of IC3800.

Check between pin (8) of J1106 and pin

(3) of IC3800.

Check between pins (3), (4) of SC1105

and pins (5), (7) of IC3800.

<Composite video signal / S-video signal> input

<Composite video signal input> Are there MAIN VIDEO signal output at pin (60) of IC3800 and SUB VIDEO signal output at pin (56)

<S-video signal input> Are there MAIN Y-signal output at pin (60) and MAIN C-signal output at pin (59) of IC3800, and SUB Y-sig

nal output at pin (56) and SUB C-signal output at pin (55)?

<Composite video signal input> Are there video signal input at pin (2) of IC401 (MAIN L.P.F.) and at pin (2) of IC501 (SUB L.P.

F.)?

<S-video signal input> Are there MAIN Y-signal input at pin (2) and MAIN C-signal input at pin (6) of IC401, and SUB Y-signal i

nput at pin (2) and SUB C-signal input at pin (6) of IC501?

Check between IC401 and IC400.

Is there video signal input at pin (85) of

IC400 (MAIN VIDEO CHROMA)?

<S-video signal input>

Are there MAIN Y-signal input at pin (85)

and MAIN C-signal input at pin (90) of

IC400 (MAIN VIDEO CHROMA)?

Are there digital video signal outputs at pins (43),

(44), (46)~(49), (54), (55) and (58) of IC400?

Check IC400 (MAIN VIDEO CHROMA) and

the peripheral circuits.

No Picture (2) No Picture (3)

No TV (U/V) picture output

Is there video signal output at output pin

(17) of the tuner (TU1101/1102)?

Are there video signal inputs at pins (7) and

(1) of IC1103 (LEVEL ADJ)?

Is each tuner video input to IC3800 (AV

SWITCH) normal?

Pin (17) (MAIN TUNER IN) of IC3800

Pin (19) (SUB TUNER IN) of IC3800

Check the tuner (TU1101/1102) and its

peripheral circuits. Replace if necessary.

Are there inputs of level adjustment control

signals at pins (6) and (2) of IC1103

(LEVEL ADJ) from pins (1) and (2) of IC1105?

Check IC1105 (CONTROL) and the peripheral

circuits. Replace if necessary.

Check IC3800 (AV SWITCH) and the

peripheral circuits.

Check between IC3800 and IC401/IC501.

Are there digital video signal inputs at pins (53), (54), (57)~(60), (51), (52) (RE0-7), pins(63)~(68), (61), (62) (GE0-7), pin

s (73)~(78), (69), (70) (BE0-7), pins

(81)~(86), (79), (80) (RO0-7), pins (91)~(96), (89), (90) (GO0-7), pins (99), (100), (1), (2), (5), (6), (97), (98) (BO0-7), an

d pins (7)~(10) (HSYNC, VSYNC, DE,

CLKIN) of IC3201 (LVDS TRANSMITTER)?

Are there digital video signal outputs at pins (49)(TA1

–), (48)(TA1+), (47)(TB1

–), (46)(TB1+), (44)(TC1

–), (43)(TC1+), (41)(TCLK

–), (42)(TCLK+), (40)(TD1

–),

(39)(TD1+), (37)(TA2

–), (36)(TA2+), (35)(TB2

–), (34)(TB2+), (32)(TC2

–), (31)(TC2+), (30)(TCLK2

–),(29)(TCLK2+), (28)(TD2

–), and (27)(TD2+) of IC3201?

Is there video signal input at pin (85) of

IC500 (SUB VIDEO CHROMA)?

<S-video signal input>

Are there SUB Y-signal input at pin (85)

and SUB C-signal input at pin (90) of

IC500 (SUB VIDEO CHROMA)?

Check between IC501 and IC500.

Are there digital video signal outputs at pins (43),

(44), (46)~(49), (54), (55) and (58) ofIC500?

Check IC500 (SUB VIDEO CHROMA) and

the peripheral circuits.

Replace the main PWB, or check between

IC400/IC500 and IC3201.

Check IC3201 (LVDS TRANSMITTER) and

the peripheral circuits.

Check the LCD CONTROL PWB.

Page 40

LC-26GA4D LC-26GA4U

TROUBLE SHOOTING TABLE (Continued)

YES

<Component video signal> input No Picture (4)

External input in trouble <INPUT 1>

Is INPUT 1 selected in the input select

menu screen?

Select INPUT 1 and the input signal in the

input select menu screen.

If signal name is gray and not selectable in

the menu screen

Is component video signal detection

functioning normally? Check between pin

(11) of J1107 and pin (32) of IC1001.

Are there signal inputs at pins (53), (55) and

(57) (Y, PB, PR) of IC3801 (COMPONENT

SWITCH)?

Check between J1107 and each input pin

of IC3801.

Check IC3700 (ADC) and the peripheral

circuits.

Are there MAIN VIDEO signal outputs at pins (50), (48), (46) (Y, PB, PR) of IC3801, PASS VIDEO signal outputs at pins (38), (36

), (34) (Y, PB, PR), and SUB

VIDEO signal outputs at pins (44), (42) and (40) (Y, PB, PR)?

SYSTEM (Single) <1 screen: 480i/480p/1080i/720p, Twin screens: 480p/1080i/720p> Are there PASS VIDEO signal inputs at pins (1),

(5) and (25) (Y, CB, CR) of IC3703 (L.P.F.)?

SYSTEM (Twin) <2 screens: 480i> Are there MAIN/SUB VIDEO signal inputs at pins (8), (10), (13) (Y, PB, PR) of IC401 (MAIN L.P.F

.) and IC501 (SUB L.P.F.)

External input in trouble <INPUT 2>

Is INPUT 2 selected in the input select

menu screen?

Select INPUT 2 and the input signal in the

input select menu screen.

If signal name is gray and not selectable in

the menu screen

Is component video signal detection

functioning normally? Check between pin

(10) of J1107 and pin (76) of IC3800.

Are there signal inputs at pins (5), (7) and (9)

(Y, PB, PR) of IC3801 (COMPONENT

SWITCH)?

Check between J1107 and each input pin

of IC3801.

Check IC3801 (COMPONENT SWITCH)

and the peripheral circuits.

Check between IC3801 and IC3703, and

between IC3801 and IC401/IC501.

SYSTEM (1) SYSTEM (2)

Are there signal inputs at pins (5), (13) and

(20) (R, G, B) of IC3700 (ADC)?

Is there signal output of RA0-7, RB0-7,

BA0-7, BB0-7, GA0-7, etc. from each

output pin of IC3700?

Check between IC3703 and IC3700.

Are there signal inputs at pins (85), (92) and (94)

(Y, PB, PR) of IC400 (MAIN VIDEO CHROMA)?

Are there signal inputs at pins (85), (92) and

(94) (Y, PB, PR) of IC500 (SUB VIDEO

CHROMA)?

Check between IC401 and IC400.

Check between IC501 and IC500.

Check IC500 (SUB VIDEO CHROMA) and

the peripheral circuits.

Check IC 400 (MAIN VIDEO CHROMA)

and the peripheral circuits.

Replace the main PWB, or check between

IC400/IC500 and IC3201.

Check IC3201 (LVDS TRANSMITTER) and

the peripheral circuits.

Are there digital video signal outputs at pins (43),

(44), (46)~(49), (54), (55) and (58) of IC400?

Are there digital video signal outputs at pins (43),

(44), (46)~(49), (54), (55) and (58) of IC500?

Are there digital video signal outputs at pins (49)(TA1

–), (48)(TA1+), (47)(TB1

–), (46)(TB1+), (44)(TC1

–), (43)(TC1+), (41)(TCLK

–), (42)(TCLK+), (40)(TD1

–),

(39)(TD1+), (37)(TA2

–), (36)(TA2+), (35)(TB2

–), (34)(TB2+), (32)(TC2

–), (31)(TC2+), (30)(TCLK2

–),(29)(TCLK2+), (28)(TD2

–), and (27)(TD2+) of IC3201?

Are there digital video signal inputs at pins (53), (54), (57)~(60), (51), (52) (RE0-7), pins(63)~(68), (61), (62) (GE0-7), pin

s (73)~(78), (69), (70) (BE0-7), pins

(81)~(86), (79), (80) (RO0-7), pins (91)~(96), (89), (90) (GO0-7), pins (99), (100), (1), (2), (5), (6), (97), (98) (BO0-7), an

d pins (7)~(10) (HSYNC, VSYNC, DE,

CLKIN) of IC3201 (LVDS TRANSMITTER)?

Check the LCD CONTROL PWB.

Page 41

LC-26GA4D LC-26GA4U

TROUBLE SHOOTING TABLE (Continued)

NO YES

YES

Are there Rx0, 1, 2 and C signal inputs to IC1900?

Are there Hsync, Vsync and RGB DAC signal outputs from IC1900?

Are there RGB, Hsync and Vsync signal outputs from MD connector?

Are outputs at pins (12) and (14) of IC1917 both (H, H)?

Check PC settings.

Check IC1915 and its peripheral circuits.

Check IC1917 and its peripheral circuits.

Check IC1900 and its peripheral circuits.

Check IC1901, IC1903 and their peripheral circuits.

Do pins (12) and (14) become (L, L) when analog AV mode is entered?

YES

Check ME connector I2C signal line.

Are IC1915 data accessed by I

when connected to PC?

Are there RGB, Hsync and Vsync signal inputs to the main PWB IC3700 and IC3701?

Check MD harness for disconnection.

YES

Check IC3700, IC3701 and their peripheral circuits.

YES

DVI Input (Digital PC mode)

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LC-26GA4D LC-26GA4U

TROUBLE SHOOTING TABLE (Continued)

NO YES

YES

Are there RGB signal inputs at pins (25), (26) and (27), and Hsync/Vsync signal inputs at pins (28) and (8) from DVI connector?

Are there Vsync and Hsync signal outputs at pins (4) and (6) of IC1904?

Are there RGB, Hsync and Vsync signal outputs from MD connector?

Are outputs at pins (12) and (14) of IC1917 both (H, L)?

Check PC settings.

Check IC1915 and its peripheral circuits.

Check IC1917 and its peripheral circuits.

Check IC1904 and its peripheral circuits.

Check IC1901, IC1903 and their peripheral circuits.

Do pins (12) and (14) become (L, H) when digital AV mode is entered?

YES

Check ME connector I2C signal line.

Are IC1915 data accessed by I

when connected to PC?

Are there RGB, Hsync and Vsync signal inputs to IC3700 and IC3701 of the main PWB?

Check MD harness for disconnection.

YES

Check IC3700, IC3701 and their peripheral circuits.

YES

DVI Input (Analog PC mode)

Page 43

LC-26GA4D LC-26GA4U

TROUBLE SHOOTING TABLE (Continued)

NO YES

YES

Are there Rx0, 1, 2 and C signal inputs to IC1900?

Are there Hsync, Vsync and RGB DAC signal outputs from IC1900?

Are there RGB, Hsync and Vsync signal outputs from MD connector?

Are outputs at pins (12) and (14) of IC1917 both (L, H)?

Check PC settings.

Check IC1911 and its peripheral circuits.

Check IC1917 and its peripheral circuits.

Check IC1900 and its peripheral circuits.

Check IC1901, IC1903 and their peripheral circuits.

Do pins (12) and (14) become (H, L) when analog PC mode is entered?

YES

Check ME connector I2C signal line.

Are IC1911 data accessed by I

when connected to PC?

Are there RGB, Hsync and Vsync signal inputs to the main PWB IC3700 and IC3701?

Check MD harness for disconnection.

YES

Check IC3700, IC3701 and their peripheral circuits.

YES

DVI Input (Digital AV mode)

Page 44

LC-26GA4D LC-26GA4U

TROUBLE SHOOTING TABLE (Continued)

NO YES

YES

Are there RGB signal inputs at pins (25), (26) and (27), and Hsync/Vsync signal inputs at pins (8) and (28) from DVI connector?

Are there Vsync and Hsync signal outputs at pins (4) and (6) of IC1904?

Are there RGB, Hsync and Vsync signal outputs from MD connector?

Are outputs at pins (12) and (14) of IC1917 both (L, L)?

Check PC settings.

Check IC1915 and its peripheral circuits.

Check IC1917 and its peripheral circuits.

Check IC1904 and its peripheral circuits.

Check IC1901, IC1903 and their peripheral circuits.

Do pins (12) and (14) become (H, H) when digital PC mode is entered?

YES

Check ME connector I2C signal line.

Are IC1911 data accessed by I

when connected to PC?

Are there RGB, Hsync and Vsync signal inputs to IC3700 and IC3701 of the main PWB?

Check MD harness for disconnection.

YES

Check IC3700, IC3701 and their peripheral circuits.

YES

DVI Input (Analog AV mode)

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LC-26GA4D LC-26GA4U

TROUBLE SHOOTING TABLE (Continued)

Are there signal inputs from HDMI (SC1901) connector to each input pin of RX0±} (pins (86) and (87)), RX1±} (pins (91) and (92)), RX2±} (pins (96) and (97)) and RXC±} (pins (83) and (84)) of IC1912 (HDMI Receiver)?

Are there HDMI Y/Pb/Pr and HDMI H/V signal inputs to IC3703 (L.P.F.) and IC3701 (SYNC SELECTOR) of the main PWB?

Is IC1913 (E

PROM) accessed by

I2C

read out DDC

I2C

CLOCK/DATA when

HDMI equipment is connected?

Check HDMI equipment settings.

Check IC3703, IC3701 and the peripheral circuits.

Are there HDMI Y/Pb/Pr and HDMI H/V signal outputs from MF connector?

Check IC1912 (HDMI Receiver) and the peripheral circuits.

Check MF harness for disconnection.

Check IC1913 (CONTROL) and the peripheral circuits.

Is there HDMI RST signal output at output pin (6) of IC1914 (CONTROL)?

Check IC1914 (CONTROL) and the peripheral circuits.

Check IC1912 and the peripheral circuits.

No HDMI input picture

YES

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LC-26GA4D LC-26GA4U

OVERALL WIRING DIAGRAM/CHASSIS LAYOUT

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LC-26GA4D LC-26GA4U

SYSTEM BLOCK DIAGRAM

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LC-26GA4D LC-26GA4U

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LC-26GA4D LC-26GA4U

MAIN BLOCK DIAGRAM

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LC-26GA4D LC-26GA4U

CPU BLOCK DIAGRAM-1/2

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LC-26GA4D LC-26GA4U

CPU BLOCK DIAGRAM-2/2

(A817WJ)

:SH-7706 CPU

(N0567FJ)

:PC IF to TMDS

(N0546FJ)

:Power

Slow Bus

UART

IRQ

(A948WJ)

:CPLD

(LHF64AF3)

:FLASH 8MB

(A985

:SDRAM

SBADD[2-15], SBDAT[16-31]

SBADD[1-22], SBDAT[0-15]

SBADD[0-25],

SBDAT[0-15]

(VHH

:Th

N_CPLD_INT[0-1]

D3V3

TXD

RXD

(CA045WJ)

:CLK-Gen

12.288MHz

XTAL

EXTAL

SBADD[1-8,19-25], SBDAT[0-15]

Slow Bus

PM_REQ

N_CPLD_INT[0-2]

N_SRESET

IBO_IRQ

CBOOT, N_EXT_BOOTS, MAIN_INT[0-1]

N_MAIN_RST

CS[0,2,4-6]

CS3

CS[0-1,3-6]

N_RD, N_BS

CKIO

N_WAIT

CLOCK/PLL

N_WE0/N_DQMLL,

N_WE1/N_DQMLU

N_RESET_SD,N_CS_SD

N_WE0/N_DQMLL,

N_WE1/N_DQMLU

PLL

N_RESET_FLASH

N_MAIN_CE[0-1]

N_RESETP

N_CS_I2CA,N_CS_I2CB, N_RESET_I2CA,N_RESET_I2CB

(N0060CE)

:DebugPORT

H-UDI

N_INT_I2CA

N_INT_I2CB

TCK, TMS, N_TRST, TDI, TDO,N_ASEMDO, N_ASEBRKAK,N_RESETP

(PST6001M)

:Reset IC

D3V3

1.9V

BU5V

TXD2

RXD2

(MLC157DT,

CKIO

10V

CKIO

N_WE0/N_DQMLL,

N_WE1/N_DQMLU

FL_VPP0

(N0056CE)

:PROGRAMPORT

N_CS_FLASH0, N_CS_FLASH1

TCK,TDO,TMS,TDI

N_SD_INT

N_RD_CPLD, N_WE0_CPLD

N_WAIT

MAIN_RDY

N_RD, N_BS

(A98

:SDRA

N_WE2/N_DQMUL,

N_WE3/N_DQMUU

SBADD[2-15], SBDAT[0-15]

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LC-26GA4D LC-26GA4U

817WJ)

-7706 CPU

(MA159WJ)

:Main Bus IF to Main

Slow Bus

UART

Reset

(A985WJ)

:SDRAM 32MB

(TC6384AF)

:SD Card Control IC

(ZA050WJ)

:SD Card Slot

SBADD[1-25], SBDAT[0-15]

D3V3

SBADD[1-8], SBDAT[0-15]

CD/DAT3,CMD,CLK,

DAT[0-2],CD,WP

SBADD[2-15], SBDAT[16-31]

I2CSLC1, I2CSDA1

I2CSLC0, I2CSDA0

(VHHT1103J44-1)

:Thermistor

TMPOUT

SRESET

PM_REQ

TXD

RXD

UARXD_A

UATXD_A

N_MAIN_RST

CBOOT, N_EXT_BOOTS,

MAIN_INT[0-1]

I/O (PortA,B)

SD_PWR

CS3

RD/N_WR

N_RASL

N_CASL

CKE

N_MAIN_WE[0-1]

N_MAIN_CE[0-1]

N_MAIN_OE

MAIN_RDY

MAIN_CLK

N_RD

N_WAIT

I2CSLC0, I2CSDA0 I2CSLC1, I2CSDA1

(7WH126FU)

:SW

(PCA9564)

:Bus to I2C x2

I2CSLC_B, I2CSDA_B

SBADD[1-2],

SBDAT[0-7]

N_RD

N_INT_I2CA,N_INT_I2CB

TXD2

RXD2

(MLC157DT,7WH126FU)

:SW

N_RD

I2CSLC2, I2CSDA2

I2CSLC_A, I2CSDA_A

(BR24L64F)

:E2PROM

I2CSLC0, I2CSDA0

CKIO

N_WE0/N_DQMLL,

N_WE1/N_DQMLU

TXD0

RXD0

N_WE0/N_DQMLL

↔

N_MAIN_WE1

N_WE1/N_DQMLU

↔

N_MAIN_WE0

RS_ON

(A985WJ x2)

:SDRAM 32MB

N_WE2/N_DQMUL,

N_WE3/N_DQMUU

SBADD[2-15], SBDAT[0-15]

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LC-26GA4D LC-26GA4U

AV BLOCK DIAGRAM

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LC-26GA4D LC-26GA4U

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LC-26GA4D LC-26GA4U

POWER BLOCK DIAGRAM-1/2

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LC-26GA4D LC-26GA4U

POWER BLOCK DIAGRAM-2/2

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LC-26GA4D LC-26GA4U

VOLTAGE MEASUREMENT CONDITION:

1. Voltages at test points are measured on exclusive AC adapter or the stable supply voltage of AC 110240V . Signals are fed by a color bar signal generator for servicing purpose and the above voltages are measured with a 20k ohm/V tester.

INDICATION OF RESISTOR & CAPACITOR:

RESISTOR

1. The unit of resistance “Ω” is omitted. (K=kΩ=1000 Ω, M=MΩ).

2. All resistors are ± 5%, unless otherwise noted. (J= ± 5%, F= ± 1%, D= ± 0.5%)

3. All resistors are 1/16W, unless otherwise noted.

4. All resistors are Carbon type, unless otherwise noted.

C : Solid

: Cement S : Oxide Film T : Special N : Metal Coating

CAPACITOR

1. All capacitors are µF, unless otherwise noted. (P=pF=µµF).

2. All capacitors are 50V, unless otherwise noted.

3. All capacitors are Ceramic type, unless otherwise noted.

(ML): Mylar (TA): Tantalum (PF): Polypro Film (ST): Styrol

CAUTION:

This circuit diagram is original one, therefore there may be a slight difference from yours.

IMPORTANT SAFETY NOTICE:

PARTS MARKED WITH “å” ( ) ARE IMPORTANT FOR MAINTAINING THE SAFETY OF THE SET. BE SURE TO REPLACE THESE PARTS WITH SPECIFIED ONES FOR MAINTAINING THE SAFETY AND PERFORMANCE OF THE SET.

AVIS DE SECURITE IMPOR TANT:

LES PIECES MARQUEES “å” ( )SONT IMPORTANTES POUR MAINTENIR LA SECURITE DE L'APPAREIL. NE REMPLACER CES PIEDES QUE PAR DES PIECES DONT LE NUMERO EST SPECIFIE POUR MAINTENIR LA SECURITE ET PROTEGER LE BON FONCTIONNEMENT DE L'APPAREIL.

DESCRIPTION OF SCHEMATIC DIAGRAM

Page 63