Sharp IT-23M1U Service Manual

SERVICE MANUAL

MODEL

CONTENTS

CHAPTER 1. OUTLINE OF THE PRODUCT,

NOMENCLATURE AND FUNCTION. . . . . . . . . . . . . . . . . .1 - 1

CODE : 00Z

IT23M1USME

LCD MONITOR

IT-23M1U

CHAPTER 2. CONNECTION, ADJUSTMENT,

OPERATION, AND FUNCTIONS. . . . . . . . . . . . . . . . . . . . .2 - 1

CHAPTER 3. DISASSEMBLY AND ASSEMBLY. . . . . . . . . . . . . . . . . . . .3 - 1

CHAPTER 4. TROUBLE SHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 - 1

CHAPTER 5. BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 - 1

CHAPTER 6. CIRCUIT DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 - 1

CHAPTER 7. PWB LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 - 1

Parts mark ed w ith "!" 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.

SHARP CORPORATION

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

CHAPTER 1. OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION

1. SPECIFICATIONS

 Product specifications  Dimensions (Units: mm)

Dot

frequency

223

Ana-

log

oo o

Model name IT-23M1U LCD display 23" TFT LCD module Actual display size 23.0" (58.3 cm) measured diagonally Resolution (max.) 1366 x 768 Displayable colors (max.) Approx. 16.77 million colors (8 bit) Dot pitch (H x V) 0.372 mm x 0.372 mm Brightness (max.) 500 cd/m

Contrast ratio 550 : 1 Angle of visibility Left-right 176° ; up-down 176°

Screen display size (H x V) Video signal Analog : Analog RGB (0.7 Vp-p) [75 Ω]

Sync signal Separate Sync (TTL level : +/-),

Video signal format NTSC Expansion compensation Digital scaling

Plug & Play VESA DDC2B compatible Power management VESA: based on DPMS

Speaker output 5 W + 5 W Input terminals Computer signal:

Receivable TV channels

Headphone terminal Mini stereo jack (φ3.5 mm) Screen tilt Upward approx. 0° -20°;

Screen swivel Approx. 90° from left through right Power supply 100 VAC - 240 VAC, 50/60 Hz

Temperature of operating environment

Power consumption 95 W

(The screen brightness deteriorates over time. Constant brightness cannot be maintained.)

(contrast ratio > 10)

508.2 mm x 285.7 mm (20.01" x 11.25")

Digital : DVI standard based on 1.0

Sync on Green,Composite Sync (TTL level:+/-)

(Enlarges VGA/SVGA/XGA etc.

[Enlarged display (full screen, Fixed aspect ratio)]

• 1:1 display is not possible.

DVI : based on DMPM

Computer audio :

Video image : RCA pin x 2 Component image : x 1 S-video image : x 1 Audio input terminal: RCA pin (L/R x 2)

VHF : 2 through 13; UHF : 14 through 69; Cable : 1 through 125

downward approx. 0° -5°

(Uses special AC adapter, type NL-A72J of Sharp Corporation)

5°C - 35°C (41°F - 95°F)

5.5 W in power-saving mode

Dimensions (W x D x H) Approx. 589 mm x 223 mm x 479 mm

Weight Approx. 13 kg; 28.7 lb.

(Approx. 23.2" x 8.8" x 18.9")

(excluding signal cable and AC adapter) Approx. 10.2 kg; 22.5 lb. (excluding stand)

to full screen size.)

Analog: Mini D-sub 15 pin (3 rows) x 1 Digital : DVI-D 24 pin x 1

Mini stereo jack (φ3.5 mm ) x 1

; 5.5 W in standby;

When "BRIGHT MODE"is set to "B RIGHT ". 62 W in "DARK1"and 52 W in "DARK2". (Uses special AC adapter)

589

431

479

319

• PC analog signal cable : approx. 1.8 m (5.9 ft.)

• PC audio cable : approx. 1.8 m (5.9 ft.)

• Antenna cable : approx. 4 m (13.1 ft.)

• Digital signal cable, NL-C04J (purchased separately) : approx. 2.0 m (6.6 ft.)

• Special AC adapter :

Approx. 1.8 m (5.9 ft.)

Dimensions (W x D x H) Approx. 170 mm x 85 mm x 40 mm (Approx. 6.7" x 3.3" x 1.6")

Note: As a part of our 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.

 Relevant signal timings (PC mode)

Screen resolution Hsync Vsyn

VESA 640 x 480

800 x 600

1024 x 768

Wide 848 x 480

1280 x 720 1280 x 768

1360 x 768 US text 720 x 400 Power

Macintosh series

• Recommended resolution is 1360 x 768, 1280 x 768 or 1024 x 768.

• All are compliant only with non-interlaced.

• Frequencies for Power Macintosh are reference values.

To connect, another adapter ( commerciall y avai labl e) may be re quired.

640 x 480

832 x 624

1024 x 768

31.5kHz 60Hz 25.175MHz

37.9kHz 72Hz 31.5MHz

37.5kHz 75Hz 31.5MHz

35.1kHz 56Hz 36.0MHz

37.9kHz 60Hz 40.0MHz

48.1kHz 72Hz 50.0MHz

46.9kHz 75Hz 49.5MHz

48.4kHz 60Hz 65.0MHz

56.5kHz 70Hz 75.0MHz

60.0kHz 75Hz 78.75MHz

31.1kHz 60Hz 33.3MHz

44.7kHz 60Hz 74.4MHz

47.986kHz 60Hz 71.0MHz

60.15kHz 75Hz

47.7kHz 60Hz 84.7MHz

31.5kHz 70Hz 28.3MHz

35.0kHz 66.7Hz 30.2MHz

49.7kHz 74.6Hz 57.3MHz

60.2kHz 75Hz 80.0MHz

102.977MHz

Digi-

tal

IT-23M1U OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION

1 – 1

• For digital connection, the monitor can be connected to a computer with a DVI-compatible output terminal (DVI-D 24 pin or DVI-I 29 pin). (Depending on the type of computer to be connected, the display may not work correctly.)

• If the monitor is receiving timing signals that are not compatible, "OUT OF TIMING" will appear. Follow your computer's instruction manual to set the timing so that it is compatible with the monitor.

• If the monitor is not receiving any signal (synch signal), "NO SIGNAL" will appear.

 The analog RGB input connector pin

(Mini D-sub connector with 15 pins)

No. Funct i on No. Function

1 Red video signal input 9 +5V 2 Green video signal input 10 GND 3 Blue video signal input 11 N.C. 4 N.C. 12 DDC data 5 GND 13 For Hsync signal input 6 For red video signal GND 14 For Vsync signal input 7 For green video signal GND 15 DDC clock 8 For blue video signal GND

 The analog RGB input connector pin

(DVI-D connector with 24 pins)

 Power management

The monitor is based on the VESA DPMS and the DVI DMPM standards. To activate the power management function, the video card and the computer used with it must also conform to these standard.

DPMS: Display Power Management Signaling

DPMS mode Screen

ON Display on 95 W Yes Yes STANDBY SUSPEND Yes No OFF No No

DMPM: Digital Monitor Power Management

DPMS mode Screen

ON Display on 95 W OFF Display off 5.5 W

Display off 5.5 W

Power

consumption

Power

consumption

H-sync V-sync

No Yes

 DDC (Plug & Play)

This monitor supports the VESA DDC (Display Data Channel) standard. DDC is a signal standa rd for carryi ng out Pl ug & Play functions on the monitor or PC. It transfer s information such as degree of resoluti on between the monitor and PC. You can use this funct ion if your PC is DDC comp liant an d if it is set so that it can detect t he Plug & Play mon itor. There are many varieties of DDC due to the differences between systems. This monitor works with DDC2B.

No. Funct i on No. Function

1 TMDS data 2- 13 N.C. 2 TMDS data 2+ 14 +5V 3 TMDS data 2/4 shield 15 GND 4 N.C. 16 Hot plug detection 5 N.C. 17 TMDS data 06 DDC clock 18 TMDS data 0+ 7 DDC data 19 TMDS data 0/5 shield 8N.C. 20N.C.

9 TMDS data 1- 21 N.C. 10 TMDS data 1+ 22 TMDS clock shield 11 TMDS data 1/3 shield 23 TMDS clock + 12 N.C. 24

TMDS clock -

IT-23M1U OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION

1 – 2

2. PRODUCT DESCRIPTION

Main unit

INPUT

BRIGHT

ENTER/

MODE

VOL/BRIGHT

Speakers

Control buttons

Headphone terminal

Remote sensor window

Power LED

3 4

5 6

Green : in use Red : in standby mode Orange : in power-saving mode (only for PC mode)

Off: power off MAIN POWER but to n

Power input terminal

PC digital RGB input terminal (DVI-D 24 pin)

PC analog RGB input terminal (mini D-sub 15 pin)

PC audio input terminal

Lug-hole for cable clamp

Antenna input terminal

Video input terminal

Audio input terminal - Left

Audio input terminal - Right

S-video input terminal

Video input terminal

Audio input terminal - Left

Audio input terminal - Right

Component input terminals

Ventilation openings: Never block the ventilation openings as this

AV-IN1

AV-IN2

may lead to overhe ating inside t he monitor and result in malfunction.

Security lock anchor: By connecting a security lock (commercially

available) to the security lock anchor, the monitor is fixed so that it cannot be t ransport ed. The security slot works in conjun ction with Ken sington Micro Saver Security Systems.

7 8

10 11 12

Remote control

13 14 15 16 17 18 19

POWER button

FREEZE button

SLEEP butt on

4 b c e d

BRIGHT MODE button

DISPLAY button

CC (Closed Caption) button

Channel buttons

Dolby Virtual button

Input buttons (PC, TV, AV1, and AV2)

VIEW MODE button

MULTI button

MENU button

BRIGHT button

MUTE button

MTS (Multi ch TV Sound) button

VOL buttons

CH (channel) buttons

FLASHBACK b utton

2 3

4 5

6 7

buttons and ENTER button

POWER

FREEZE

SLEEP

BRIGHT

MODE

DISPLAY

PC AV2AV1TV

VIEW MODE

MULTI

ENTER

CC MTS MUTE

Virtual

BRIGHT

VOL

FLASHBACK

10 11

12 13

14 15

16 17

18 19

Removing the cover

Be careful not to pinch the cables.

Replacing the cover

IT-23M1U OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION

1 – 3

 Cable clamp

Use the supplied cable clamp to secure the cables connected to the terminals.

Caution: When adjusting the viewing angle, cables may be pulled.

Therefore, ensure that the cables have sufficient slack.

 Using headphones (commercially available)

You can connect headphones (commercially available) to the monitor.

 Angle adjustment

Adjust to an easy to view angle. Caution:

• Be sure to hold both sides of the monitor when adjusting the viewing angle. The LCD panel used in this monitor is made of glass. Pressure from hands on the LCD panel could cause damage.

• Be careful not to allow your fingers to be pinched.

approx. 20˚

approx. 5˚ approx. 45˚

approx. 45˚

Headphone terminal

Headphones

Note:

• When headphones are connected, no sound can be heard from the monitor speakers.

• When headphones are connected, the Virtual Dolby Surround function (see page E27) cannot be used.

• When headphones are connected, the AUDIO ADJUST menu (see pages E34 and E51) cannot be adjusted.

IT-23M1U OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION

1 – 4

CHAPTER 2. CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS

1. CONNECTION

1-1. Connecting the monitor to a computer

Caution:

• When connecting, ensure that the monitor and all the equipment you are connecting to it are switched off.

• Be careful not to over bend the cable or add extension cords as this could lead to a malfunction.

Note:

• When using the monitor with an analog connection, perform an automatic screen adjustment under the following conditions:

• Using the monitor for the first time.

• After having changed the system settings during use.

• When using the monitor with a digital connection, automatic screen adjustment is unnecessary.

• Depending on the computer or OS, you may have to install the setup information for the monitor.

• When connecting to a notebook and the notebook computer's screen is set so that it is displaying at the same time, the MS-DOS screen may not be able to display properly. In this case, change the settings so that only the monitor is displaying.

 Analog connection

Connect the supplied PC analog signal cable to the analog RGB output terminal of the computer. For information on removing/replacing the terminal cover.

PC analog RGB input terminal

 Digital connection

Connect the separately-sold digital signal cable (model name: NLC04J) to the digital RGB output terminal of the computer. For information on removing/replacing the terminal cover.

• The monitor has an input terminal for connecting to a computer with a DVI-compatible output terminal (DVI-D 24 pin or DVI-I 29 pin). (Depending on the type of computer to be connected, the display may not work correctly.)

PC digital RGB input terminal

Digital signal cable (separately-sold)

• Paying attention to the connector direction, firmly insert the signal cable straight into theconnector, and then tighten the screws at both ends.

Digital RGB output terminal

PC analog signal cable

(supplied)

Analog RGB output terminal

• Paying attention to the connector direction, firmly insert the signal cable straight into the connector, and then tighten the screws at both ends.

If connecting to a D-sub 15 pin 2 row Apple P ower Macint osh, attach a Macintosh conversion adapter (commercially available) to the analog signal cable.

Power Macintosh

Macintosh conversion adapter

 Connecting the audio cable

Connect the supplied PC audio cable to the audio output terminal of the computer.

PC audio input terminal

Audio output terminal

PC audio cable (supplied)

IT-23M1U CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS

2 – 1

1-2. Connecting the monitor to a home antenna terminal

Caution: When connecting, ensure that the monitor is switched off. The antenna requirements for good color television reception are more

important than those for black & white television reception. For this reason, a good qualit y outd oor ant enna is st rongly re commende d. The following is a brie f ex planat i on of t he type of connect i ons that are provided with the various antenna systems.

1. A 75-ohm system is generally a round cable with F-type connect or

F-type connector

that can easily be attached t o a terminal without tools (not sup plied ).

2. A 300-ohm system is a flat "twin-

75-ohm coaxial cable (round)

lead" cable that can be att ached to a 75-ohm terminal through a 30075-ohm adapter (not supplied) .

300-ohm twin-lead cable (flat)

Note:

• The 75-ohm coaxial cable is recommended.

• TV memory for channels is empty at shipment. To receive channels, use the CHANNEL SETTING menu.

 Outdoor antenna connection

• Use one of the following two diagrams if you connect an outdoor antenna.

A: Using a VHF/UHF combination outdoor antenna. B: Using separate VHF and/or UHF outdoor antennas.

•

Connect the outdoor antenna cable lead-in to t he ANT (antenna input) terminal on the left side of the monitor.

A. Combination VHF/UHF Antenna

VHF/UHF

antenna

Home Antenna terminal (75-ohm)

Antenna cable (supplied)

Antenna input terminal (ANT)

300/75-ohm

adapter

(not supplied)

300-ohm twin-lead

B. Separate VHF and/or

Combiner

(not supplied)

OUT

coaxial cable

UHF Antennas

antenna

300-ohm twin-lead

75-ohm coaxial cable

Caution: When connecting the RF cable to the monitor, do not tighten

F-type connector with tools. If tools are used, it may cause damage to your monitor. (The breaking of internal circuit, etc.)

F-type connector

75-ohm

UHF

VHF/UHF

antenna

VHF antenna

 Cable TV (CATV) connection

• A 75-ohm coaxial cable connector is built into the set for easy hookup. When connecting the 75-ohm coaxial cable to the set, screw the 75-ohm cable to the ANT (antenna input) terminal.

• Some cable TV companies offer "premium pay channels". Since the signals of these premium pay channels are scr ambled, a cable TV converter/descrambler is generally provided to the subscriber by the cable TV company. This converter/descrambler is necessary for normal viewing of the scrambled channels. (Set your monitor to channel 3 or 4, typically one of these channels is used. If this is unknown, consult your cable TV company.) For more specific instructions on installing cable TV, consult your cable TV company. One possible method of utilizing the converter/descrambler provided by your cable TV company is explained below. Please note: An RF switch provided with two inputs (A and B) is required (not supplied).

"A" position on the RF switch (not s upplied) :

You can view all unscramble d ch annels by usin g the monit or's channel buttons.

"B" position on the RF switch (not s upplied) :

You can view the sc ramb led chann els vi a the c on verte r/de scr amble r by using the converter's channel keys.

RF switch (not supplied)

OUT

Cable TV converter/ descrambler (not supplied)

Two-set signal splitter (not supplied)

Cable TV Line

Note: Consult your SHARP Dealer or Service Center for the type of

splitter, RF switch or combiner that might be required.

1-3. Connecting the monitor to AV equipment

Caution: E nsure that the monitor and all the equipment you are con-

necting to it are switched off before you begin.

 Examples of equipment you can connect

Equipment with S-video output terminals VCRsVideo cameras Home video game systems Videodisc players

VCRs Video cameras Home video game systems Videodisc players DVD players etc.

DVD players etc.

75-ohm coaxial cable

IT-23M1U CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS

Equipment with component output terminals DVD players etc.

2 – 2

 AV equipment with video output terminals

Left side of the monitor

AV-IN1 or AV-IN2

(Yellow) (Yellow)

(White) (White)

(Red) (Red)

RCA pin cable (commercially available)

VCR etc.

Note: When you are using the video input terminal, do not connect

cables to the S-video input terminal and the component input terminals.

 AV equipment with S-video output terminals

Left side of the monitor

AV-IN1

VCR etc.

1-4. Connecting the monitor to a power source

Caution:

• When connecting, ensure that the monitor is switched off.

• Always use the AC adapter that came with the monitor.

• Be careful not to over bend the cable or add extension cords as this could lead to a malfunction.

1. Connect the AC adapter to the power input terminal.

Power input terminal

AC adapter (supplied)

(White) (White)

(Red) (Red)

RCA pin cable (commercially available)

S-video cable (commercially available)

Note: When you are using the S-video input terminal, do not connect

the cable to the video input terminal.

 AV equipment with component output terminals

Left side of the monitor

AV-IN2

RCA pin cable (commercially available)

(White) (White)

(Red) (Red)

(Green) (Green)

(Blue) (Blue)

(Red) (Red)

Component video cable (commercially available)

Note: When you are using the co mponent input terminals, do not con-

nect the cable to the video input terminal. Connecting the monitor to a power source

DVD player etc.

2. Plug the power cord into the AC adapter and then place the power plug into an AC outlet.

Power cord (supplied)

AC outlet

AC adapter (supplied)

IT-23M1U CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS

2 – 3

1-5. Instructions for attaching a VESA compliant arm

An arm or stand based on the VESA standar d (comme rcially available) can be attached to the monitor. Procurement of the arm or stand is at the customer's discretion.

 Arms or stands able to be used

Attachments must satisfy the following.

• Compatible with the VESA standard.

• The s ix screw ho les on the s ection to be attached have a gap of 100 mm between them.

• Not be likely to fall off or break off after being attached to the monitor.

 How to attach the arm or stand

Be careful not to over bend the cable or add extension cords as this could lead to malfunction. While following these instructions, please also refer to t he installation instructions in the operation manual included with the arm or stand.

Caution: Be careful not to get your fingers pinched between the display

and stand nor to let the stand drop. These could lead to injury.

1. Remove the cables.

5. Attach the arm to the monitor with the six screws.

Note:

• The screws used to attach the arm should be M4 screws with a length of 6 mm - 8 mm (0.24" - 0.31") protruding from the surface to be attached. Using different screws could cause the monitor to fall off or to be internally damaged.

6 mm - 8 mm (0.24" - 0.31")

2. Spread out a soft cloth on a suitable horizontal surface. Being careful not to damage the monitor, gently lay the monitor on it displayside down.

3. Remove the two screws and then remove the re ar cover of the stand.

4. Remove the six screws and then remove the stand f rom the moni tor.

Screw used to attach arm Arm

Part of monitor to which arm is attached

Notes:

• The stand is specially made for use with this monitor. Once having removed the stand, never attempt to at tach i t to anot her equi pmen t.

• Once having removed the screws, store them together with the stand and if the stand is ever re-att ached be sur e t o use the or igina l screw s. Using different screws could le ad to a mal functio n.

IT-23M1U CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS

2 – 4

2. ADJUSTMENT

2-1. ADJUSTMENT METHOD (PC MODE)

* Press the PC button to select PC mode.

1) Resetting all adjustment v

alues

Press the above two buttons at same time, and while turn the power on.

2) Adjustment lock function

(Press the button and select "BRIGHT" or "VOLUME".)

Power ON

3) DOLBY VIRTUAL

DOLBY VIRTUAL

VIEW MODE

TI SCREEN DISPLAY

MUL

MULTI

PIP POSITION

ON/OFF

CHANGE

While displaying the PIP window, you can also set this item directly using the bcde buttons, instead of the adjustment screen.

Adjustment pattern

END

ENTER

ADJUSTMENT

(Analog)

GAIN CONTROL

ENTER

(Analog)

ENTER

AUDIO ADJUST

If you do not press any buttons for about 30 seconds while in a menu screen, the settings you made up to that point will be applied and the screen will automatically disappear.

AUTO CLOCK

PHASE H-POS V-POS RESET AUTO

BLACK LEVEL CONTRAST RESET TREBLE BASS BALANCE DOLBY VIRTUAL

(e d buttons) (e d buttons) (e d buttons) (e d buttons)

(e d buttons) (e d buttons)

(e d buttons) (e d buttons) (e d buttons)

(e d buttons)

ENTER

COLOR CONTROL

COLOR CONTROL WHITE BALANCE

(e d buttons)

(COOL, STD, WARM, USER)

RESET

ENTER

MODE SELECT

VIEW MODE 480 LINES 768 LINES SOUND

(e d buttons) (e d buttons) (e d buttons) (e d buttons)

R-CONTRAST

G-CONTRAST

B-CONTRAST

(e d buttons)

SCALING RESET

ࠨ೰

MULTI SCREEN

MULTI SCREEN DISPLAY PIP SIZE PIP POSITION PC POSITION SUB SOURCE SOUND

(e d buttons) (e d buttons)

(e d buttons) (e d buttons) (e d buttons) (e d buttons)

RESET

IT-23M1U CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS

2 – 5

2-2. ADJUSTMENT ITEM LIST (PC MODE)

BUTTON

MENU 1: ADJUSTMENT

MENU 2: GAIN CONTROL

MENU 3: AUDIO ADJUST

MENU 4: WHITE BALANCE

MENU 5: MODE SELECT

ITEM ADJUSTMENT DESCRIPTION

MANUAL CLOCK 0~255 CLOCK: Adjust so that vertical flicker noise is not emitted.

PHASE 0~255 PHASE: Adjust so that horizontal flicker noise is not emitted.

H-POS Indefinite H-POS (horizontal positioning) and V-POS (vertical positioning) V-POS Indefinite

AUTO Automatic screen adjustment

MANUAL BLACK LEVEL 0~100 BLACK LEVEL: Total screen brightness can be adjusted

CONTRAST 0~100 CONTRAST: While watching the color pattern, adjustments

AUTO GAIN CONTROL Menu

TREBLE -30~0~+30 Adjusts high-pitch sounds. BASS -30~0~+30 Adjusts low-pitch sounds. BALANCE -30~0~+30 Adjusts the balance between the right and left sp eakers. DOLBY VIRTUAL ON/OFF Tur ns the Virt ual Dolb y Surroun d fun cti on "ON" or "O FF".

COLOR MODE STD, sRGB,

WHITE BALANCE COO L • S T D •

VIEW MODE NORMAL, FULL Selects the screen size.

480 LINES 640, 848 Specifies the horizontal resolution of a 480-line screen.

768 LINES 1024, 1280, 1360 Specifie s the horizontal resolution of a 768-line screen.

SOUND

SCALING 1~4 LANGUAGE

IT-23M1U CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS

VIVID

WARM (5 le ve ls) , USER R • G • B: 0~255

PC, TV, AV1, AV2,

2 – 6

buttons)

e d

(

buttons)

e d

To center the screen image within the boundaries of the screen, adjust the left-right (H-POS) values and the up-down (V-POS) values. (

Options in the ADJUSTMENT Menu can be adjusted automatically (CLOCK, PHASE, H-POS V-POS).

AUTO: Every menu option is automatically adjusted using the

You can also set this item directly using the re mote c ontrol, i nstead of the adjustment screen.

Selects the color tone.

WHITE BALANCE Menu

COOL : Color tone bluer than standard

STD : Color tone standard setting

WARM : Color tone redder than standard

USER

NORMAL :

FULL :

(For analog signals) 640 : 640 x 480 dot mode 848 : 848 x 480 dot mode

(For analog signals) 1024 : 1024 x 768 dot mode 1280 : 1280 x 768 dot mode 1360 : 1360 x 768 dot mode

Selects the audio to listen to while displaying the computer screen. When the PIP/SPLIT window is displayed, the audio set by "SOUND" in the MULTI SCREEN menu takes precedence. When "STATUS" in the V-CHIP BLOCK menu is "ON", TV/AV-IN SOUND is not available in PC mode.

Adjusts the image to optimum sharpness when it is enlarged. Selects the language (English, French or Spanish) on the screen.

buttons)

e d

while watching the color pattern. (

can be made so that all graduations appear. (

buttons)

e d

Auto Gain Control function.

STD : Displays images using the original color tone of the LCD

sRGB : sRGB is an international standard for color rep

VIVID : Displays images in vivid primary colors.

R-CONTRAST: G-CONTRAST: B-CONTRAST:

monitor.

resentation defined by the IEC International Electrotechnical Commission). Colors are converted by taking into account the liquid crystal's characteristics and thereby represent color tone close to the original image.

• : Color tone slightly bluer than standard

• : Color tone slightly redder than standard

button for blue-green, d button for red

button for purple, d button for green

button for yellow, d button for blue

Displays the image without changin g it s as pect ratio. When the image's resolution is lowe r tha n 1024 x 768, the image is expanded. Expands the image so that it fills the screen. (The aspect ratio may change.) You can also set this item directly using the remote control, instead of the adjustment screen.

e d

buttons)

BUTTON ITEM ADJUSTMENT DESCRIPTION

MENU 6: MULTI SCREEN

MULTI SCREEN DISPLAY

OFF, PIP, SPLIT Designates whether the com puter's sc reen and TV or v ideo

images are displayed simultaneously. OFF: PIP: The TV or video image appears in a small window

(PIP window) on the computer screen.

SPLIT: The computer's screen and the TV or video image appear

side by side in two split windows. You can also set this item directly using the remote control, instead of the adjustment screen.

PIP SIZE Changes the size of the PIP window. PIP POSITION Adjusts the position of the PIP window.

] [c] buttons.

To move up and down, press the [ To move left and right, press the [

] [d] buttons.

While displaying the PIP window, you can also set this item directly using the remote control, instead of the adjustment screen.

PC POSITION CENTER, LEFT Designates the position of the computer screen when the PIP win-

dow is displayed. This item is enabled when the computer's "VIEW MODE" is set to "NORMAL".

IT-23M1U CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS

2 – 7

2-3. ADJUSTMENT METHOD (TV/AV MODE)

Press the

* /

If you do not press any buttons for about 30 seconds while in a menu screen, the settings you made up to

AV1

AV2

button to select TV or AV mode.

that point will be applied and the screen will automatically disappear.

1) Resetting all adjustment values Press the above two buttons at same time, and while turn the power on.

2) Adjustment lock function

(Press the button and select "BRIGHT" or "VOLUME".)

Power ON

3) DOLBY VIRTUAL

DOLBY VIRTUAL

ON/OFF

4) VIEW MODE

VIEW MODE

CHANGE

5) SLEEP TIMER

SLEEP TIMER

to change the setting.

(The time changes in the following order each time you press the button)

6) CC/TEXT

CC/TEXT

Adjustment pattern

END

to change the setting. (The setting changes in the following order:)

ENTER

GAIN CONTROL

AUDIO ADJUST

CHANNEL SETTING (TV mode only)

SCREEN ADJUST

MODE SELECT

CLOSED CAPTION

ENTER

c c

c c c

c c

AUTO CONTRAST

BLACK LEVEL COLOR TINT SHARPNESS FLESH TONE VIDEO SELECT WHITE BALANCE RESET

TREBLE BASS

BALANCE

DOLBY VIRTUAL

RESET

AIR/CABLE CABLE MODE

CHANNEL SEARCH CHANNEL MEMORY

VIEW MODE POSITION

RESET

SLEEP TIMER LANGUAGE

RESET

CC/TEXT

(e d buttons) (e d buttons)

(e d buttons) (e d buttons) (e d buttons) (e d buttons) (e d buttons) (e d buttons) (e d buttons)

(e d buttons) (e d buttons)

(e d buttons)

ENTER

V-CHIP BLOCK

IT-23M1U CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS

c c

MPAA TV GUIDELINES

STATUS

RESET

(e d buttons) (e d buttons)

(e d buttons)

2 – 8

2-4. ADJUSTMENT ITEM LIST (TV/AV MODE)

BUTTON ITEM ADJUSTMENT DESCRIPTION

MENU MENU 1:

VIDEO ADJUSTMENT

MENU 2: AUDIO ADJUST

MENU 3: AUDIO ADJUST (TV mode only)

MENU 4: SCREEN ADJUST

MENU 5:

MODE SELECT

MENU 6: CLOSED CAPTION

MENU 7: V-CHIP BLOCK

CONTRAST  Adjusts contrast. BLACK LEVEL  Adjusts the overall brightness of the screen. COLOR  Adjusts the color depth. TINT  Adjusts the color tone. SHARPNESS  Adjusts the image quality. FLESH TONE  Adjusts the flesh tone color. VIDEO SELECT 

Selects the type of image to display improving the quality of the images. This adjustment is invalid for images from the S-video and component input terminals.

WHITE BALANCE  Adjusts the color temperature.

STD : Standard setting for color tone. WARM : Color tone redder than standard.

TREBLE BASS BALANCE DOLBY VIRTUAL

-30~0~+30 Adjusts high-pitch sounds.

-30~0~+30 Adjusts low-pitch sounds.

-30~0~+30 Adjusts the balance between t he right and left spea kers. ON/OFF Turns the Virtual Dol by Surround fun ction "ON" or "OFF".

You can also set this item directly using the remote control, instead of the adjustment screen.

AIR/CABLE CABLE MODE CHANNEL SEARCH CHANNEL MEMORY VIEW MODE

Sets the receiving mode broadcast (AIR) or cab le TV (CABLE). Set this item when "AIR/CABLE" is set to "CABLE". Sets available channels aut omati cally. Sets channels manually. Selects the screen size. NORMALDisplays 4:3 aspect ratio TV images nor mall y. WIDE :Expands 4:3 images horizontally to fill the entire screen

(16:9).

ZOOM1: Expands the image to fill the screen (16:9) with wide black

bands across the top and bottom such as letterbox format movies.

ZOOM2: Can be used when "ZOOM1" cuts of f capti ons or t elops at

the top or bottom of the screen.

FULL : Returns images horizont all y reduce d fr om 16:9 to 4: 3 back

to 16:9 so they fill the entire screen.

You can also set this item directly using the remote control, instead of the adjustment screen. Depending on the type of data received or the video software used, screen edges may be slightly cut off or the image may have a black border.

POSITION

Adjusts the position of the imag e. V-POSITION : Adjusts the image's vertical posit ion. H-POSITION : Adjusts the image's horizontal position. RESET : Resets the image's position to the monitor's original

factory setting.

SLEEP TIMER

Specifies how many minutes until the moni tor switche s off (st andby) . You can also set this item directly u sing t he remote control, instead of the adjustment screen.

LANGUAGE

Selects the language (English, French or Spani sh) on the screen.

CC/TEXT Sets the CC/TEXT mode.

MPAA Sets whether MPAA block or unblock (-----). TV GUIDELINES Sets whether TV GUIDELINES block or unblock (-----). STATUS Sets whether the block setting st atus is ON or O FF.

When "STATUS" in the V-CHIP BLOCK menu is "O N", TV/AV-IN SOUND is not available in PC mode.

IT-23M1U CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS

2 – 9

2-5. ALL RESET

(1) RETURNED TO AN INITIAL VALUE SET VALUE

• ALL RESET All the adjustment values except the custom mode (special sp ecification) are reset.

Press and hold down both the [Menu] button and the

[OK/BRIGHT] mode button on the system unit while pressing the power supply button on the system unit, Hold the three buttons down until displaying on the screen as "ALL RESET".

After ALL RESET is completed, it starts.

• INITIALIZE (For service) All the adjustment values including those of the custom mode (special specifications) are reset.

Press and hold down both the [INPUT], [Menu] button and the

[

] button (VOL/BRIGHT) on the system unit while pressing the

power supply button on the system unit, Hold the three buttons down until displaying on the screen as "INITIALIZE".

After INITIALIZE is complete d , it st a r ts.

(2) Version display (for service)

Press and hold do wn bo th the [MENU] button and the [ d ] button (VOL/ BRIGHT) on the system unit while pressing the [POWER] button on the system unit, to turn on the power supply of the system. Hold the three butto ns down until the version is displayed on screen.

The software version and checksum appears on screen.

Turn off the power supply of the system or terminate the display of

the version by pressing the [MENU] button on the system unit.

VERSION & CHECK SUM

VERSION : 1.01 (2004XXXX)

CHECK SUM : OK XX XX

CUSTOM MODE : OFF

2-6. IT-23M1 EDID Writing Procedure

[Tool target models] IT-23M1 [Tool operating environment]

• Windows95/ Windows98/ Windows2000/ Windows XP

• The printer port I/O address is set to 378. (Refer to the supplementary explanations.)

[Installing procedure] (1) Create a folder of "c:\fg." (2) Copy all the files in the launcher tool into c:\fg folder.

If there is already a launcher tool folder, use that folder. (Use the launcher tool of the latest version.)

(3) Copy all the files in the EDID writing tool for servicing of the

IT-23M1 into c:\fg folder. [Operating procedures] (1) Connect the jig to the PC. (Refer to the connection diagram.) (2) Execute c:\fg\launcher.exe. (3) The window is displayed.

Select the target model in [Classification].

Select "XXXXXXXX (target model) write EDID" in [Process content].

After selection, click [EXECUTE].

(3) Aging (for service)

Make sure the signal cable is disconnected from the PC before starting this procedure.

Press and hold dow n th e [ENT ER/BR IG HT] but ton an d the [ e ] (VOL/ BRIGHT) button while pressing the [POWER] button of the system unit to turn on the system. Hold down the three keys until the ageing menu appears on screen.

The ageing menu is displayed on screen.

AGING TEST

AGING TEST1

AGING TEST2

button on system unit

[MENU] [ENTER/BRIGHT] [INPUT]

 Ageing test 1:The screen is switched over in the following manner:

 Ageing test 2:Every time the [

When turn off, press

button on system unit

buttons on system unit

DARK BLUE BLUE3GREEN3RED3WHITE3 BLACK

the screen is switched over as follows: WHITE3BLACK3RED3GREEN3BLUE3WHITE50%

DARK GREEN3DARK RED

buttons

[INPUT]

: Select options : Execute the selected test. : Terminate ageing menu.

] (VOL, BRIGHT) button is pressed,

Aging is not ended even if it shuts off the main power supply.

(4) The confirmation window to check the execution content is

displayed. If it is OK, press YES, if not, press NO. When NO is

pressed, the process returns to (3). When YES is pressed,

the process goes to the next step.

At this point, do not connect the jig to the monitor.

IT-23M1U CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS

2 – 10

(5) When the following window is displayed, check the possible causes

below.

1. The jig and the PC are not connected properly.

2. The jig is already connected to the monitor. Check the conne cti on, and p re ss OK bu tt on an d th en [ NEXT ] bu tto n.

(6) The following window is displayed. Connect the jib to the monitor.

Check the model name.

(10)When writing is normally completed or [Cancel] button is pressed

on the EDID error window, the process returns to the window of (7).

Then writing of another set can be executed. (11)Press [POWER] button to turn off the power. [Supplementary explanations]

• How to set the printer port I/O address to 378.

1. Open the control panel system.

2. Open the device manager tag, and check the display by type.

[Setting on the monitor side]

1 : Connect the RGB cable and the DVI-D cable to the monitor and

the jig.

2 : Press [POWER] key to supply power and wait until [No input

signal] is displayed.

(7) Enter the serial number with 10-key, and click [NEXT]. (8) The following window is displayed.

On this window, EDID writing and verifying are performed. When the operation is interrupted halfway, connection may be wrong. Check to confirm it. When writing is completed, the window of item (6) is displayed. Connect the jig to the following monitor. Repeat EDID writing procedures from item (6) to the next monitor.

(9) When an error occur s in writing or verifying:

When an error occurs in writing or verifying, the above window is displayed. When [Retry ] bu tton is pres se d, E DID wri ting a nd ver ifying a re exe cute d again. Norma l ly check the cable connection and press this button. If an error still occurs in retry, pres s [Ca ncel] butt on. Whe n [Canc el] button is pres s e d, the next -step window is forcibly display ed. However, note that EDID writing is not properly completed.

3. Click [+] on the left of [Port (COM/LPT)] to check to insure that there

is [Printer port (LPT1)]. (The printer port indication may be s lightly

different such as [ECP printer port (LPT1)].)

4. Open the printer port (LPT1) property.

5. Uncheck [Automatic setti ng is u sed.] and se lect [Basi c setting 0 000].

(If [I/O range] is already [0378 ? 037F], there is no need to change.)

• In the above descriptions on the writing procedures, the copy destination of the files is "c:\fg". However, any other folder may be acceptable as far as all the files are copied to that same folder on the hard disk.

IT-23M1U CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS

2 – 11

[IT-23M1 EDID writing tool connection diagram]

Connect to the USB port of PC

No need to connect a serial cable.

X1049MP-27

Serial connector

DVI-D connector

Connect to the printer port of PC

Parallel connector

Board

VGA connector

DVI-D cable

USB

2-7. IT-23M1 Flash Writing Procedures

[Tool target models] IT-23M1 [Tool operating environment]

• Windows 98/ Windows 2000/ Windows XP [Installing procedures] (1) Create a folder of "c:\fg." (2) Copy all the files in the launcher tool into c:\fg folder.

(Use the launcher tool of the latest version.) (3) Copy all the files in the Flash writing tool FD into c:\fg folder. (4) Double-click "install.bat" in c:\fg folder. (If the MS-DOS prompt does

not disappear automatically, delete is manually.) (5) Copy all the files in the Flash writing data FD into c:\fg folder. [Operating procedures] (1) Connect the jig to the PC. (Refer to the connection diagram.) (2) Execute "c:\fg\launcher. exe." (3) The following window is displayed. Select suitable items in [Classifi-

cation] and [Process content].

Select the target model in [Classification].

Select [XXXXXXXX (Target model) write FLASH (firmware)] in [Pro-

cess content].

DIP switch setting

USB cable

VGA cable

SW1:Parallel(EDID) SW2: AUTO SW3: 1502A SW4: 1502A

Left, Right, Right, Right (from the top with the parallel connector at the top)

IT-23M1

Back of the Unit

DVI pin

Serial(PROGRAM) MANUAL T1620 T1620

VGA pin

The confirmation window for execution is displayed. If it is OK, press [YES]. If not, press [NO]. When [NO] is p ressed, the proc ess ret urns to (3). When [YES] is pressed, the process goes to the next step. When a button is pressed, the window is changed.

(4) The following window is displayed. Connect the jig to the monitor.

After selection, click [EXECUTE].

[Monitor setting]

1. Connect the VGA cable to the jig.

2. While pressing [ [

] (Sound volume/Brightness), turn on the power and wait until

] (Tuning) and [d] (Sound volume/Brightness) and

[ISP MODE] is displayed. After confirming that [SP MODE] is displayed, press [Decide/Energy Save] key.

[Setting on the writing tool side] Execute the PORT setting in [Connection Settings]. (The figure shows

the case where COM1 port is sued. When COM4 port is used, write as "PORT=COM4" on the display below. Once it is set, it is saved. Change the port name to the actually used port name.

IT-23M1U CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS

2 – 12

(5) Check the model name .

After checking, press OK button.

(6) The following window is displayed.

When [Run] button is pressed, writing FLASH is executed.

(7) When writing is completed, the following window is displayed. ("Fin-

ished. (reset the monitor)" is displayed.)

(8) When an error occurs in writing, the following window is displayed.

("Error!!!" is displayed.)

(9) After normal completion of writing, disconnect the power cable of

the monitor and connect it again. Press [POWE R] key of the monitor to turn off.

(10)When [Back] button is pressed after normal c ompletion of writing,

the process returns to the window of item (6). From then, writing to another set can be executed. While pressing [ [

] (Sound volume/Brightness), turn on the power and wait until

] (Tuning) and [d] (Sound volume/Brightness) and

[ISP MODE] is displayed. Press [Decide/Energy Save] key and repeat procedures from (6).

(11)To terminate writing FLASH, press [Back] button and press [Exit]

button.

[IT-23M1 FLASH writing tool connection diagram]

Connected to PC COM1 port

Connected to PC

RS-232C(Dsub9pin)

Cross cable

USE X1049MP-27.

(Not required when writing firmware)

Parallel connector

Serial connector

Board

DVI-D

connector

IT-23M1U CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS

Connected to PC USB port

USB

VGA

connector

2 – 13

USB cable

VGA

cable

X1049MP-27 DIP swch direction SW1 firmware is on the Serial side.

SW1Parallel(EDID) Serial(PROGRAM) SW2 AUTO MANUAL SW3 1502A T1620 SW4 1502A T1620

Right, Right, Left, Left from the top with the parallel connector at the top

IT-23M1

Back surface

VGA

CHAPTER 3. DISASSEMBLY AND ASSEMBLY

1. STAND DISASSEMBLY

1. Remove two screws 1, and remove the stand cover 2. Remove six screws

, and remove the stand 4.

2. KEY PWB DISASSEMBLY

1. Remove the left rear cover 1 and the lower rear cover 2 . Remove twelve screws

and remove the rear cover 4.

2. Remove five screws Disconnect the connector and remove the main PWB

, and remove the heat sink 2.

at five positions, remove six screws 4,

4. SPEAKER UNIT DISASSEMBLY

1) Remove ele ven screw s 1, and remove the bracket 2. Remove eight screws

, and remove the speaker unit 4.

2. Remove four screws and remove the key PWB

, disconnect the co nnect or 2 at one position,

3.MAIN PWB DISASSEMBLY

1) Remove eleve n screws 1, and remove the I/O cover 2. Remove twelve screws

, and remove the shield plate 4.

5. SWITCH PWB DISASSEMBLY

1) Remove nin eteen screws 1, and remove the thermal base plate 2. Disconnect the connector and remove the switch PWB

at one position, remove two scre ws 4,

6. LCD UNIT DISASSEMBLY

1.Remove the LCD unit 2 from the display cover 1.

IT-23M1U DISASSEMBLY AND ASSEMB LY

3 – 1

CHAPTER 4. TROUBLE SHOOTING

No image or sound comes out.

Is the power LED lit up in green?

Yes

Is the backlight off?

Yes

Are the pin(1),(2),(12) of J4 andthe pin(1) of J503 normal?

Yes

Is the main voltage +V_MAIN normal?

Yes

Check the inverter board and connect it properly.

Yes

Is the power LED lit upin orange?

Is the power LED lit up in red?

Is the AC cord normal?

Replace the AC

Proceed to “No picture at all”.

Check U19 and the circuits around it or performwriting to U26 using the special writing jig?

Check the power line.

Yes

Press any key, then wake it up

Press the power button

No picture at all.

Is in/output of U19 normal?

Yes

Check LCD panelvoltages and waveform.

There is problems with the picture.(1/3)

Check all the setting microprocessor’s adjust process menu.

Check U19 and the circuits around it.

TV out is abn

Is voltages at pin(6),(7) (9) of U33 normal?

Is output of U33 normal?

Is in/output of U15 normal?

Is in/output of U18 normal?

Is in/output of U6 normal?

Is in/output of U4 normal?

Is in/output of U19 normal?

ormal.

Yes

Check the power line.

Check U33 and the circuits around it.

Check U15 and the circuits around it.

Check U18 and the circuits around it.

Check U6 and the circuits around it.

Check U4 and the circuits around it.

Check U19 and the circuits around it.

IT-23M1U TROUBLE SHOOTING

4 – 1

problems with the pictur

e is

e.(2/3)

Check all the setting microprocessor’s adjust process menu.

AV1/AV2 ou t is abnormal.

Is TV out normal?

Yes

Is in/output of U15

normal?

Check U1 5 and the circuits around it.

There is problems w

eck a

ll th

e set

ting

ith the

picture.(3/3)

ocessor’s adjust process menu.

mic

opr

S-Video out is abnormal.

Is TV ou t normal?

Yes

Is in/outpu U509 normal

Yes

Is in/output of U6 normal?

Proceed to “T V out is

Check U5 09 and the

uits

heck U6 and the

circuits around it

ormal”Proceed to “T V out is abnormal”

abn

nd i

D-co

nnector out is abnorm

s TV out nor

mal

Yes

Is in/output of U29 normal?

Yes

Are

in/outpu

ts of U6

and U2 normal?

Yes

Is in/output of U4 normal?

al.

roceed

“T

V out

is abnorm

al”

Anal og D-sub o

TV ou t no

ut is

rmal?

abn

ormal.

roce

ed to “T

abn

rmal

”

Yes

Check U2 9 and the

rcu

its around it.

Is in/output of J8 normal?

Connect properly and check

ircuits around it.

e c

Yes

Check U6

the circuits around it.

heck U4 a n

or U2 and

d the

Is in/output of U19 normal?

heck U1

circuits around it.

9 an

d the

circuits around it.

IT-23M1U TROUBLE SHOOTING

4 – 2

+ 47 hidden pages

Sharp IT-23M1U Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual