Sharp Aquos lc-37d90u User manual

SAFETY PRECAUTION

CHAPTER 1. SPECIFICATIONS

CHAPTER 2. OPERATION MANUAL

CHAPTER 3. DIMENSIONS

CHAPTER 4. REMOVING OF MAJOR PARTS

CHAPTER 5. ADJUSTMENT

CHAPTER 6. TROUBLE SHOOTING TABLE

CHAPTER 7. OVERALL WIRING/BLOCK DIAGRAM

CHAPTER 8. SCHEMATIC DIAGRAM

CHAPTER 9. PRINTED WIRING BOARD ASSEM-

BLIES

Parts Guide

No. S56S8LC37D90U

LC-37D90U

SERVICE MANUAL

MODEL

CONTENTS

Parts marked with " " 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.

This document has been published to be used for

after sales service only.

The contents are subject to change without notice.

TopPage

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.

LC-37D90U

LCD COLOR TELEVISION

CONTENTS

SAFETY PRECAUTION

IMPORTANT SERVICE SAFETY PRE-

CAUTION.........................................................i

PRECAUTIONS A PRENDRE LORS DE

LA REPARATION............................................ ii

PRECAUTIONS FOR USING LEAD-

FREE SOLDER.............................................. iii

CHAPTER 1. SPECIFICATIONS

[1] SPECIFICATIONS ...................................... 1-1

CHAPTER 2. OPERATION MANUAL

[1] OPERATION MANUAL ............................... 2-1

CHAPTER 3. DIMENSIONS

[1] DIMENSIONS ............................................. 3-1

CHAPTER 4. REMOVING OF MAJOR PARTS

[1] REMOVING OF MAJOR PARTS ................ 4-1

CHAPTER 5. ADJUSTMENT

[1] ADJUSTMENT PROCEDURE .................... 5-1

[2] MAJOR IC INFORMATIONS .................... 5-17

CHAPTER 6. TROUBLE SHOOTING TABLE

[1] TROUBLE SHOOTING TABLE................... 6-1

CHAPTER 7. OVERALL WIRING/BLOCK DIA-

GRAM

[1] OVERALL WIRING DIAGRAM ................... 7-1

[2] SYSTEM BLOCK DIAGRAM ...................... 7-3

[3] MAIN BLOCK DIAGRAM ............................ 7-5

[4] POWER BLOCK DIAGRAM ....................... 7-7

CHAPTER 8. SCHEMATIC DIAGRAM

[1] DESCRIPTION OF SCHEMATIC DIA-

GRAM ......................................................... 8-1

[2] R/C, LED Unit ............................................. 8-2

[3] IF Unit ......................................................... 8-3

[4] MAIN Unit.................................................... 8-7

[5] KEY Unit ................................................... 8-53

[6] SPEAKER TERMINAL-L Unit ................... 8-54

[7] SPEAKER TERMINAL-R Unit................... 8-54

CHAPTER 9. PRINTED WIRING BOARD ASSEM-

BLIES

[1] IF Unit ......................................................... 9-1

[2] MAIN Unit.................................................... 9-3

[3] R/C, LED Unit ............................................9-11

[4] KEY Unit ....................................................9-11

[5] SPEAKER TERMINAL-L Unit ................... 9-12

[6] SPEAKER TERMINAL-R Unit................... 9-12

Parts Guide

LC-37D90U

LC-37D90U Service Manual

SAFETY PRECAUTION

IMPORTANT SERVICE SAFETY PRECAUTION

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:

3. 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.

4. 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.

5. To be sure that no shock hazard exists, check for leakage current in

the following manner.

• Plug the AC cord directly into a 120 volt AC outlet.

• Using two clip leads, connect a 1.5k ohm, 10 watt resistor paral-

leled by a 0.15µF capacitor in series with all exposed metal cabinet

parts and a known earth ground, such as electrical conduit or elec-

trical ground connected to an earth ground.

• Use an AC voltmeter having with 5000 ohm per volt, or higher, sen-

sitivity 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.

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

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 " " 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.

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

servicing guidelines which follow:

CAUTION: FOR CONTINUED

PROTECTION AGAINST A RISK OF

FIRE REPLACE ONLY WITH SAME

TYPE FUSE.

F701 (125V 8A),

F4701, F5701 (250V 3A ~ 115

DVM

AC SCALE

1.5k ohm

10W

TO EXPOSED

METAL PARTS

CONNECT TO

KNOWN EARTH

GROUND

0.15

TEST PROBE

LC-37D90U

PRECAUTIONS A PRENDRE LORS DE LA REP-

ARATION

AVERTISSEMENT

6. N'entreprendre aucune modification de tout circuit. C'est dan-

gereux.

7. 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 vérifica-

tions suivantes.

8. 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.

9. Inspecter tous les dispositifs de protection comme les boutons de

commande non-métalliques, les isolants, le dos du coffret, les cou-

vercles ou blindages de réglage et de compartiment, les réseaux

de résistancecapacité, les isolateurs mécaniques, etc.

10.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 cou-

rant 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 con-

nue 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 métal-

lique, 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'adpata-

tion non polarisée peut être utilisée dans le but de terminer ces

vérifications.)

La tension de pointe mesurèe ne doit pas dépasser 0.75V (corre-

spondante au courant CA de pointe de 0.5mA).

Dans le cas contraire, il y a une possibilité de choc électrique qui

doit être supprimée avant de réndre le recepteur au client.

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 identifiées par la marque " " 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, incend-

ies, radiations X ou autres accidents.

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

conseils suivants.

PRECAUTION: POUR LA

PROTECTION CONTINUE

CONTRE LES RISQUES

D'INCENDIE, REMPLACER LE

FUSIBLE

F701 (125V 8A),

F4701, F5701 (250V 3A ~ 115

DVM

ECHELLE CA

1.5k ohm

10W

0.15

SONDE D'ESSAI

AUX PIECES

METALLIQUES

EXPOSEES

BRANCHER A UNE

TERRE CONNUE

LC-37D90U

iii

PRECAUTIONS FOR USING LEAD-FREE SOL-

DER

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:

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 dam-

age 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.

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.

Lead-free wire solder for servicing

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

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

LC-37D90U

1 – 1

LC-37D90U Service Manual

CHAPTER 1. SPECIFICATIONS

[1] SPECIFICATIONS

* Emergency alert messages via Cable are unreceivable.

• As part of policy of continuous improvement, SHARP reserves the right to make design and specification changes for product

improvement without prior notice. The performance specification figures indicated are nominal values of production units.

There may be some deviations from these values in individual units.

LCD panel

Number of dots

Function

TV-standard

Receiving

Channel

VHF/UHF

CATV

Digital Terrestrial

Broadcast (8VSB)

Audio multiplex

Audio out

Terminals Rear INPUT 1

INPUT 2

INPUT 3

INPUT 4

INPUT 5

Air ANTENNA

DIGITAL AUDIO OUTPUT

OUTPUT

OSD language

Power Requirement

Power Consumption

Weight

Dimension

(W H D)

Accessories

Operating temperature

6,220,800 dots (1920 1080 3 dots)

American TV Standard ATSC/NTSC System

VHF 2-13ch, UHF 14-69ch

1-135ch (non-scrambled channel only)

2-69ch

BTSC System

10W 2

AV in, COMPONENT in

AV in, S-VIDEO in

HDMI in with HDCP

Audio in, HDMI in with HDCP

Audio in, DVI-I in with HDCP

75 Unbalance, F Type for VHF/UHF/Digital Air in 1

Optical Digital audio output 1 (PCM/Dolby Digital)

Audio out

English/French/Spanish

AC 120 V, 60 Hz

Remote control unit ( 1), AC cord ( 1), "AAA" size battery ( 2), Cable clamp ( 1),

Cable tie ( 1), Operation manual ( 1)

32°F to 104°F (0°C to 40°C)

Item Model: LC-37D90U

37" Advanced Super View & BLACK TFT LCD

with stand

w/o stand

with stand

230 W

50.7 lbs./23.0 kg

62.9 lbs./28.5 kg

inch

Digital cable*

(64/256 QAM)

1-135ch (non-scrambled channel only)

inch

Cable ANTENNA

i.LINK

75 Unbalance, F Type for CATV/Digital Cable in 1

IEEE1394 2 with DTCP (Compatible with DTVLink)

LC-37D90U

2 – 1

LC-37D90U Service Manual

CHAPTER 2. OPERATION MANUAL

[1] OPERATION MANUAL

Part names

TV (Front) TV (Rear)

Part names

POWER button

Channel buttons

(CH /)

Volume buttons (VOL /)

INPUT button

OPC indicator*

POWER

indicator**

OPC sensor*

Remote control sensor

DVI terminal

(INPUT5)

INPUT2

terminals

AUDIO OUTPUT

terminals

HDMI terminal(INPUT3)

HDMI terminal(INPUT4)

i.LINK terminals

INPUT1 terminals

RS-232C terminal AIR IN terminal

DIGITAL AUDIO

OUTPUT

terminal

DVI AUDIO

terminal

(INPUT5)

AUDIO input

terminals

(INPUT4)

CABLE IN terminal AC INPUT terminal

LC-37D90U

2 – 2

Part names

Remote control unit Removing the stand

Setting the TV on the wall

Appendix

117

11 25

16 32

1 TV POWER: Switches the TV power on or enters

standby mode.

2 DISPLAY: Displaysthe channel information.

3 SOURCE POWER: Turns the power of the external

equipment on and off.

4 External equipment operational buttons: Operates

the external equipment.

5 0–9:Sets the channel.

6 • (DOT):

7AIR:Receives air signal.

8 CABLE: Receives cable signal.

9VOL/:Sets the volume.

10 SURROUND: Selects Surround settings.

11 INFO: Displays the program information screen.

12 FREEZE: Sets the still image. Press again to return to

normal screen.

13 EXIT: Turns off the menu screen.

14 SLEEP: Sets the sleep timer.

15 i.LINK: Displays the i.LINK control panel.

16 AUDIO: Selects the MTS/SAP or the audio mode during

multi-channel audio broadcasts.

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

SAT, VCR, DVD and AUDIO operation. Indicator lights up

for the current mode.

* To enter the code registration mode, you need to press

FUNCTION and DISPLAY at the same time.

18 LIGHT : When pressed all buttons on the remote

control unit will light. The lighting will turn off if no

operations are performed within about 5 seconds. This

button is used for performing operationsin low-light

situations.

19 VIEW MODE: Selects the screen size.

20 ENT: Jumps to a channel after selecting with the 0–9

buttons.

21 FLASHBACK:Returns to the previous channel or

external input mode.

22 INPUT: Selects a TV input source. (TV,INPUT1, INPUT

2, INPUT3, INPUT4, INPUT5, i.LINK)

23 CH / : Selects the channel.

24 MUTE: Mutes the sound.

25 CH LIST: Displays the channel list screen.

26 MENU: Displays the menu screen.

27 ////ENTER: Selects a desired item on the

screen.

28 RETURN: Returnsto the previous menu screen.

29 FAVORITE CH

A, B, C, D: Selects four preset favoritechannels in four

different categories.

While watching, you can toggle the selected channels by

pressing A, B, C and D

30 FAVORITE: Registers favorite channels.

31 CC: Displays captions from a closed-caption source.

32 AV MODE: Selects an audio or video setting. (AVmode:

STANDARD,MOVIE,GAME, USER,DYNAMIC (Fixed),

DYNAMIC.PC mode: STANDARD,MOVIE,GAME,

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

NOTE

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

Before detaching (or attaching) stand, unplug the AC cord from the AC INPUT terminal.

CAUTION

• Do not remove the stand from the TV unless using an optional wall mount bracket to mount it.

Before attaching/detaching stand

• Before performing work make sure to turn off the TV.

• Before performing work spread cushioning over the base area to lay the TV on. This will prevent it from being

damaged.

CAUTION

• Installing the TV requires special skill that should only be performed by quali-ed service personnel. Customers

should not attempt to do the work themselves. SHARP bears no responsibility for improper mounting or

mounting that results in accident or injury.

Using an optional bracket to mount the TV

• You can ask a quali-ed service professional about using an optional AN-37AG2 bracket to mount the TV to the

wall.

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

Hangingonthewall

AN-37AG2 wall mount bracket. (See the bracket instructions for details.)

Vertical mounting

About setting the TV angle

Unfasten the screws used to secure

the stand in place.

Unfasten the four screws used to

secure the stand in place.

NOTE

• To attach the stand, perform the above steps in reverse order.

Angular mounting

0° or 5°

NOTE

• Detach the cable clamp on the rear of the TV when using the optional mount bracket.

Detach the stand from the TV.

(Hold the stand so it will not drop from

the edge of the base area.)

LC-37D90U

2 – 3

Appendix

Troubleshooting Troubleshooting-Digital broadcasting

PC compatibility chart

Appendix

Possible Solution

• Is the volume too low?

• Is "Variable" selected in "Output Select"?

Cautions regarding use in high and low temperature environments

Problem

• No power

• Unit cannot be operated.

• Remote control unit does not

operate.

• Picture is cut off/with sidebar

screen.

• Strange color, light color, or color

misalignment

• Power is suddenly turned off.

• No picture

• No sound

• Check if you pressed TV POWER on the remote control unit. If the

indicator on the TV does not light up, press POWER on the TV.

• Is the AC cord disconnected?

• Has the power been turned on?

• External influences such as lightning, static electricity, may cause improper

operation. In this case, operate the unit after fi-rst turning on the power of the TV or

unplugging the AC cord and replugging it in after 1 or 2 minutes.

•Isthe

FUNCTION set correctly? Set it to the TV setting position.

• Are batteries inserted with polarity ( , ) aligned?

• Are batteries worn out? (Replace with new batteries.)

• Are you using it under strong or fluorescent lighting?

•Is a fluorescent light illuminated near the remote control sensor?

• Is the image position correct?

• Are screen mode adjustments such as picture size made correctly?

• Adjust the picture tone.

• Is the room too bright? The picture may look dark in a room that is too bright.

• Check the input signal setting.

• Is the sleep timer set?

• Check the power control settings.

• The unit's internal temperature has increased.

Remove any objects blocking vent or clean.

• Is connection to other components correct?

• Is correct input signal source selected after connection?

• Is the correct input selected?

• Is picture adjustment correct?

• Is "On" selected in "Audio Only"?

• Is a non-compatible signal being input?

•

When the unit is used in a low temperature space (e.g. room, office), the picture may leave trails or appear slightly delayed.

This is not a malfunction, and the unit will recover when the temperature returns to normal.

•

Do not leave the unit in a hot or cold location. Also, do not leave the unit in a location exposed to direct sunlight or near a

heater, as this may cause the cabinet to deform and the Liquid Crystal panel to malfunction.

Storage temperature: 4°F to 140°F ( 20°C to 60°C)

Possible Solution

The error message about reception of broadcast

• Failed to receive broadcast.

E203 • Check the broadcast time in the program guide.

Caution sentence

• Record/Playback may fail on the

selected model.

• Wrong connection or no i.LINK

connection was found. Refer to

Operation Manual on connection.

• The selected model is disabled to

record/play. Check that no other

model is used.

• Displayed when you have selected a device that is not compatible with the TV, or

that does not have DTLA copy protection technology installed.

• Displayed when a problem is experienced with a connection using i.LINK cable.

Check the connection, and re-connect the cable if necessary.

• Displayed when the device you have selected is already being used by another

i.LINK connected device. To operate the selected device from the TV, you will first

have to override control from the other device.

The example of an error

message displayed on a screen

• No broadcast now.

Error code

E202

Possible Solution

• Check the antenna cable. Check that the antenna is correctly

setup.

The cautions about i.LINK

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.

31.5 kHz

37.9 kHz

37.5 kHz

35.1 kHz

37.9 kHz

48.1 kHz

46.9kHz

48.4 kHz

56.5 kHz

60.0 kHz

64.0 kHz

47.7kHz

75.0 kHz

34.9 kHz

49.7 kHz

60.2 kHz

640 x 480

720 x 400

VGA

800 x 600SVGA

XGA 1024 x 768

WXGA

SXGA 1280 x 1024

1360 x 768

UXGA* 1600 x 1200

VGA 640 x 480

MAC13"

XGA 1024 x 768MAC19"

SVGA 832 x 624MAC16"

70 Hz

60 Hz

72 Hz

75Hz

56 Hz

60 Hz

72 Hz

75 Hz

60 Hz

70 Hz

75 Hz

60 Hz

67 Hz

75 Hz

PC/MAC

Horizontal Frequency

VESA StandardResolution

Vertical Frequency

*Digital input only.

LC-37D90U

2 – 4

Appendix

RS-232C port specifications

Appendix

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 communication settings on the PC to match the TV's communication conditions.

The TV's communication settings are as follows:

Baud rate:

Data length:

Parity bit:

Stop bit:

Flow control:

9,600 bps

8bits

None

1bit

None

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.

Command format

Eight ASCII codes CR

Command 4-digits Parameter 4-digits Return code

C1 C2 C3 C4 P1 P2 P3 P4

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".)

Any numerical value can replace the "x" on the table.

0055

100

0009

????

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

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

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

Command table

• Commands not indicated here are not guaranteed to operate.

Response code format

Normal response

Return code (0DH)

Problem response (communication error or incorrect command)

ERR

• 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.

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 input-switches to i.LINK.

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

ANALOG

(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)

Only available when DVI ANALOG is being input.

(Toggle) [AV]

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

In Air, 2–69ch is effective.

In Cable, 1–135ch is effective.

If it is not TV display, it will input-switch to TV. (same function as CH )

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 [AV] [PC]

Off

OFF

OFF TIMER – 30 MIN.

The channel number of TV

The channel number of TV 1

(Toggle)

(1–135)

AUTO

POWR

ITGD

ITVD

IAVD

INP1

INP5

INPUT SELECTION A TOGGLE

i.LINK

INPUT SELECTION B

AV MODE SELECTION

VOLUME

POSITION

VIEWMODE

Surround

SLEEP TIMER

CHANNEL

Air/Cable SELECT

DIRECT

(ANALOG)

(DIGITAL)

CH UP

CH DOWN

CHANNEL

H-POSITIONH-POSITION

V-POSITION

CLOCK

PHASE

INPUT 1

INPUT 5

AVMD

VOLM

HPOS

VPOS

CLCK

PHSE

ACSU

OFTM

DCCH

CHUP

CHDW

CLCP

WIDE

DIGITAL Air (Two-Part numbers, 2-digit plus 2-digit)(0101-9999)

(0-999)

(0-9999)

(0-6383)

DIGITAL Cable (Two-Part numbers, 3-digit plus 3-digit)

Front half of DIGITAL CABLE CHANNEL NO. (Designate major channel)

Rear half of DIGITAL CABLE CHANNEL NO. (Designate minor channel)

DIRECT

CHANNEL

DA2 P* * **

DC2 U* * * _

DC2 L***_

DIGITAL Cable (One-Part numbers, 5-digit, less than 10,000)

DC1 0 * * * *

DIGITAL Cable (One-Part numbers, 5-digit, more than 10,000)

DC1 1****

AIR CABLE AIR(Toggle)ACS L 0 _ _ _

AIR1___

CABLE2___

(Toggle)

AUDIO SELECTION ACHAx___

OFF TIMER – 60 MIN.

OFF TIMER – 90 MIN.

OFF TIMER – 120 MIN.4___

(Toggle)

Off

MUTE MU T E 0

Full Screen [AV]9___

Effective only when the Standby Mode is set to "Mode1".

Power Off

Power On1___

LINKx___

7___

INPUT1-5

NOTE

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2 – 5

Basic adjustment settings

Menu items for TV/INPUT 1/INPUT 2 Menu items for HDMI/DVI

Picture

Setup

Audio

Option

Power Control

Digital Setup

Picture

Setup

Audio

Option

Power Control

Digital Setup

OPC

Backlight

Contrast

Brightness

Color

Tint

Sharpness

Advanced

Color Temp.

Black

3D-Y/C

Monochrome

Film Mode

Range of OPC

EZ Setup

CH Setup

Antenna Setup-DIGITAL

Input Skip

Input Label

Parental CTRL

Position

Picture Flip

Standby Mode

Language

Reset

Treble

Bass

Balance

Surround

Audio Only

Digital Noise Reduction

Input Select

Output Select

Quick Shoot

Color System

Caption Setup

Program Title Display

Favorite CH

No Signal Off

No Operation Off

Audio Setup

i.LINK Setup

OPC

Backlight

Contrast

Brightness

Color

Tint

Sharpness

Advanced

Color Temp.

Black

Monochrome

Film Mode

Range of OPC

Input Skip

Input Signal

Auto Sync.

Input Label

Fine Sync.

Position

Picture Flip

Standby Mode

Language

Reset

Treble

Bass

Balance

Surround

Audio Only

Digital Noise Reduction

Input Select

HDMI Setup

Output Select

Quick Shoot

No Signal Off

No Operation Off

i.LINK Setup

LC-37D90U

3 – 1

LC-37D90U Service Manual

CHAPTER 3. DIMENSIONS

[1] DIMENSIONS

(200)

(100)

(439)

(63) 26

(664)

(729)

(822.6)

(671)

(122)

(104)

(930)

(306)

(463.8)

(585)

Unit: inch/(mm)

LC-37D90U

4 – 1

LC-37D90U Service Manual

CHAPTER 4. REMOVING OF MAJOR PARTS

[1] REMOVING OF MAJOR PARTS

1. Detach the SD Card Cover.

2. Remove the 2 lock screws and detach the Stand Cover.

3. Remove the 4 lock screws and detach the Stand.

4. Remove the SP Wire (L)(R). Remove the 4 lock screws and detach the Speaker Box.

5. Remove the 13 lock screws, 6 lock screws, 4 lock screws and detach the Rear Cabinet.

SD Card Cover

Stand Cover Stand

Speaker Box

SP Wire (R)

SP Wire (L)

Rear Cabinet

Front Cabinet

LC-37D90U

4 – 2

6. Remove the Stand Bottom Cover.

7. Disconnect the [FB] connector. Remove the 2 lock screws and detach the Fan Angle C Ass’y.

8. Remove the 4 lock screws and detach the SUS Angle (L)(R).

9. Remove the 5 lock screws and detach the Stand Fixing Angle.

10.Remove the 6 lock screws and detach the Main Shield.

11.Disconnect all the connectors from all the PWBs.

Stand Bottom Cover

Stand Fixing Angle

Fan Angle C Ass'y

SUS Angle (R)

Main Shield

SUS Angle (L)

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4 – 3

12.Remove the 3 lock screws and detach the Fan Angle L Ass’y.

13.Remove the 2 lock screws and detach the SP (L) PWB.

14.Remove the 3 lock screws and detach the SP Fixing Angle (L).

15.Remove the 2 lock screws and detach the SP (R) PWB.

16.Remove the 3 lock screws and detach the SP Fixing Angle (R).

17.Remove the 2 lock screws and detach the R/C, LED PWB.

18.Remove the 2 lock screws and detach the Top Control Cover.

19.Remove the 3 lock screws and detach the KEY PWB.

20.Remove the 4 lock screws and detach the Try Chassis.

Fan Angle L Ass'y

Top Control Cover

KEY PWB

Try Chassis

SP (L) PWB

SP Fixing Angle (L)

SP Fixing Angle (R)

R/C, LED PWB

SP (R) PWB

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4 – 4

21.Remove the 9 lock screws and detach the Jack Angle Long.

22.Remove the 6 lock screws and detach the POWER PWB.

23.Remove the 6 lock screws and detach the IF PWB.

24.Remove the 5 lock screws and detach the MAIN PWB Radiator and MAIN PWB.

25.Remove the 2 lock screws from the Panel Fixing Angle (C), the 2 lock screws from the Panel Fixing Angle (L)(R) and detach the LCD Panel Ass'y.

26.Remove the 3 lock screws and detach the Panel Fixing Angle (C).

27.Remove the 4 lock screws and detach the Panel Fixing Angle (L)(R).

Jack Angle Long

POWER PWB

IF PWB

MAIN PWB Radiator

MAIN PWB

25 26

27 27 25

Panel Fixing Angle (C)

Panel Fixing

Angle (R)

Panel Fixing

Angle (L)

LC-37D90U

5 – 1

LC-37D90U Service Manual

CHAPTER 5. ADJUSTMENT

[1] 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.

MAIN Unit: DKEYDD743FM21

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.

•Mainsoftware

• Monitor microprocessor software

The main software and the monitor microprocessor software can be upgraded by using a general-purpose SD memory card.

The followings are the procedures for upgrading, explained separately for each of the main software, the monitor microprocessor software.

2.2. Main software version upgrade

2.2.1 Get ready before you start

• SD memory card of 32MB or higher capacity

• PC running on Windows 98/98SE/ME/2000/XP operating system

• SD memory card reader/writer with USB connectivity

• SD memory card formatting software

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

2.2.2 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.)

LC-37D90U

5 – 2

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

3. Click [Exit] 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 OLYMAxxx.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.

2.2.3 Upgrading the software

1. Turn off the AC power (Unplug the AC power cord).

2. Insert the upgrading SD card (prepared as instructed above) into the service slot.

NOTE: Be careful not to insert the SD card in the wrong way. Otherwise the card may come into the set and fail to come out.

3. Turn on the AC power (Plug in the AC power cord).

4. A couple to dozen seconds after the set starts, the upgrade screen below shows up.

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5. If any of the procedures fails, the following upgrade failure screen shows up. For the failing procedure, the “NG” marking turns red.

NOTE: In such case, try to upgrade the software again. If it still fails, the hardware may be in trouble.

6. When all the procedures are complete, the following upgrade success screen shows up. The new software version can be confirmed on screen.

The version number appears when each item has been successfully upgraded. Finally the main version number appears on screen.

7. Turn off the AC power (Unplug the AC power cord). Take out the upgrading SD card.

8. Now the software has been upgraded.

NOTE: Then get the set started and call the process adjustment screen 1/27 to check the main software version.

CAUTION: 1) Do not take out and put in the SD memory card during formatting.

2) With the SD formatted, all the data stored on the medium will be deleted.

3) Do not start the SD formatting with the memory card’s WRITE PROTECT switch still on.

4) If the SD memory card format software does not recognize the SD memory card, take out and put in the SD memory card again, and

click the “UPDATE” button.

5) After checking the performance, use the set under its interface environment.

6) The SD formatting is impossible on drives that are not recognized “REMOVABLE”.

2.3. Upgrading the monitor microprocessor software

2.3.1 Kit

Have the above “Upgrading the main software” kit or equivalent at hand.

2.3.2 Preparations

As discussed in “Upgrading the main software” earlier, create the SD card for upgrading the monitor microprocessor software. For this SD card, use

the monitor microprocessor upgrading binary image file.

2.3.3 Upgrading procedure

To follow the monitor microprocessor software upgrading, the monitor screen upgrade progress indicator and the flashing power LED indicator can be

used.

1. Turn off the AC power (Unplug the AC power cord).

2. Insert the upgrading SD card (prepared as instructed above) into the service slot at the back of the set. Insert the SD card with its logo-printed face

upward (visible). Be careful not to insert the SD card in the wrong way. Otherwise the card may come into the set and fail to come out.

3. Turn on the AC power (Plug in the AC power cord).

CAUTION: Now the monitor microprocessor software starts getting upgraded. Be very careful not to turn off the power while the software is being

upgraded. Otherwise the software will fail to upgrade itself and the set will fail to get started.

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5 – 4

4. A couple to dozen seconds after the set starts, the upgrade screen below shows up. The upgrade progress is indicated on screen. The power LED

indicator goes out once and then starts flashing in blue. (It takes 2-3 minutes to get the monitor microprocessor software upgraded.)

5. If the procedure fails, the following upgrade failure screen shows up and the “NG” marking turns red. The power LED indicator fails to start flashing