Sharp LC-26GA4D User manual

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 re-
stored to its original condition and only parts identical to those specified should be used.
CONTENTS
Page
»IMPORTANT SERVICE SAFETY PRECAUTION.......................................................................................2
»SPECIFICATIONS ......................................................................................................................................5
»OPERATION MANUAL ...............................................................................................................................6
»DIMENSIONS ...........................................................................................................................................13
»REMOVING OF MAJOR PARTS..............................................................................................................14
»ADJUSTMENT PROCEDURE..................................................................................................................18
»TROUBLESHOOTING TABLE .................................................................................................................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-26GA4U
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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 AGAINSTA 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 theAC 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 anAC voltmeter having with 5000 ohm per volt,
or higher, sensitivity or measure theAC 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 theAC 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
ËService work should be performed only by qualified service technicians who are thor-
oughly 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
AV

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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)
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AVIS POUR LA SECURITE
De nombreuses pièces, électriques et mécaniques,
dans les téléviseurACL 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
ËNe 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,
ledosdu coffret,lescouvercles oublindagesderéglage
et de compartiment, les réseaux de résistance-
capacité, les isolateurs mécaniques, etc.
3. S'assurer qu'il n'y ait pas de danger d'électrocution en
vérifiant la fuite de courant, de la facon suivante:
•Brancher le cordon d'alimentation directem-ent à une
prise de courant de 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 kΩ10 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.
Toutes les vérifications doivent être refaites après avoir
inversé la fiche du cordon d'alimentation. (Si
nécessaire, une prise d'adpatation non polarisée peut
être utilisée dans le but de terminer ces vérifications.)
Tous les courants mesurés ne doivent pas dépasser
0.5 mA.
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
AV

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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
LFa

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LC-26GA4D
LC-26GA4U
SPECIFICATIONS
Item 26"LIQUID CRYSTALTELEVISION,
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/m2
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
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 picture 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 terminal
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.
3
2
115
5
6
4
7
18
16
17
19
20
8
9
30
21
22
10 24
25
26
12
11 27
13
14 29
23
28
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:Operatethe
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.
9Virtual:Select VirtualDolby Surroundsettings.
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.
16 :Whenpressed all buttonson the remotecontrolunit
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 source. (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 desireditem onthe 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.
28 EDIT: Register favorite channel.
29 AV MODE: Select an audio or video setting.
USER, DYNAMIC (Fixed), DYNAMIC. PC mode:
STANDARD, USER.)
30
•
(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 source 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
•
•Pleaserefer to therelevant operationmanual (DVD player,
PC, etc.) carefully 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
To watch a DVD image, select "INPUT1" from "INPUT
SOURCE" menu using INPUT on the remote control
unit or on the Display.
INPUT SOURCE
TV INPUT1
INPUT2
INPUT3
INPUT4
INPUT5
CARD
1
MENU
[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.
PressMENU and the MENU screendisplays.
2
3
Press / to select "Input Select", and then
press ENTER.
4
Press / to select "Option".
MENU
[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
DVD player
ø3.5 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 aVCR
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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Using external equipment
DigitalTV STB
Connecting a DigitalTV 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)
DigitalTV STB
DigitalTV STB
ø3.5 mm stereo minijack cable
(commercially available) DVI cable (Commercially available)
When using component cable.
When using composite cable.
When using DVI cable. (INPUT 5)
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
TV INPUT1
INPUT2
INPUT3
INPUT4
INPUT5INPUT5
CARD
1
PressMENU and theMENU screendisplays.
2
3
Press / to select "HDMI Setup", and then
press ENTER.
4
Press / to select "Option".
MENU
[Option ... HDMI Setup]
Option
Digital Noise Reduction
Output Select
Center Channel Input
Audio Only
Quick Shoot
[Fixed]
[Off]
HDMI Setup
[Low]
[Off]
5
Press / to select the desired item and
press ENTER.
Press / / / to
selectthedesiredsetting
and press ENTER.
6
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.

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LC-26GA4U
Using external equipment
PC with DVI terminal
Connecting a PC
Use the INPUT 5 terminal to connect a PC.
ø3.5 mm stereo minijack cable
(commercially available) DVI cable (Commercially available)
ø3.5 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
back
down.
Make sure to disconnect the connected speaker
cables in advance when connecting external
speakers.
–
–
++
1
2
3

11
LC-26GA4D
LC-26GA4U
RS-232C port specifications
Return codeCommand 4-digits Parameter 4-digits
PC Control of theTV
•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
30
0009
0
????
?
+
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.
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.
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]
On
Off
OFF
OFF TIMER –30 MIN.
The channel number of TV
The channel number of TV 1
The channel number of TV 1
(Toggle)
(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
CC
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
0
x
0
*
x
0
5
6
7
8
1
2
0
*
*
*
*
*
0
0
*
x
x
x
x
1
1
2
0
1
2
3
4
5
6
7
8
*
*
1
2
3
4
5
6
*
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
*
*
*
*
*
*
*
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
*
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
*
*
*
*
*
*
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
(Toggle)
AUDIO SELECTION ACHAx _ _ _
_
_OFF TIMER –60 MIN.
OFF TIMER –90 MIN.
2
3_
__
__
_OFF TIMER –120 MIN.4___
_
_
(Toggle)
On
Off
MUTE MUTE 0
1
2
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_AUTO
VIDEO
COMPONENT
AUTOINP2
INPUT 20
1
2
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
TV
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)
OK
ERR
×

12
LC-26GA4D
LC-26GA4U
Appendix
PC compatibility chart
Apple and Macintosh are registered trademarks
of Apple Computer, Inc.
DDCisaregisteredtrademark of VideoElectronics
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
PC 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
60 Hz
60 Hz
67 Hz
75 Hz
75 Hz
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
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.
ColorTemp.
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
Language
Treble
Bass
Balance
Dolby 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
Quick Shoot
Center Channel Input

13
LC-26GA4D
LC-26GA4U
DIMENSIONS
Unit: inch/(mm)
3
15
/ 16 (100)
3
15
/
16
(100) 5
15
/
16
(151)
22
23
/ 64 (568)
12
5
/
8
(321)
26
7
/ 64 (663)
33
3
/ 8 (848)
8
7
/
64
(206)
19
13
/
32
(493)
7
29
/
32
(201)
16
1
/
64
(407)
3
47
/
64
(95)
20
23
/ 64 (517)
2
43
/
64
(68)
10
15
/ 16 (278)

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.
3
3
5
5
2
2
4
4
Terminal Cover (L)
Terminal Cover (R)
Cabinet-A
1
Stand
Bracket Cover
Speaker
Speaker
Bracket Cover
P151
P2002
P7706
P5706
P1903
P3701
P1902
P1900
P7200
P3700
P5702
P1901
P1904 SC3200
SC3802
SC4601
SC7200
6
8
7-1
7-2
9
9
10
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
10
10

15
LC-26GA4D
LC-26GA4U
11. Remove the main, CPU and PC card PWBs.
11-1.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
13
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
12-2 12-3
12-2
12-3
11-1
11-1
11-1
11-3
11-2
11-2
11-2
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
14
14
14
14

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
19
17
18
15
16
15
20
1-Bit Amp PWB
Speaker
Angle (L)
Speaker
Angle (R)
Center Angle
R/C, LED PWB
21 26
22
24
25
23

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)
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
27
29
28
29

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)

19
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.
1Insert 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.)
2When the formatting is over, the following window appears. Click [OK].
3Click [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.
4Copy 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.

20
LC-26GA4D
LC-26GA4U
US
Program OK NG
OK NG
EEPROM
<SYSTEM UPGRADE>
12 %
US
Program OK NG
OK NG
EEPROM
Ver 1.07(U 2004/04/01 2)
<UPGRADE FAILURE>
100 %
How to upgrade the software
1Shut off the AC power (i.e. unplug the AC cord).
2Insert 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 right-
hand 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.
3While 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.
4After the unit startup, the system upgrade screen as shown below appears within 10-20 seconds.
5Even 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.