Asus MM19T Service Manual

ASUS MM19T

19” LCD MONITOR

MM19T

THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY. EVERY REASONABLE EFFORT

HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT GUARANTEE THE

ACCURACY OF THIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RE LIABILITY FOR

CHANGES, ERRORS OR OMISSIONS.

SERVICE MANUAL

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Table of Content

Revision List………………………………………………………………………………………………………….

3

1. Monitor Description……………………………………………………………………………………………..

4

2. LCD Monitor Description………………………………………………………………………………………..

5

3. Operating Instructions…………………………………………………………………………………………..

6

3.1 General Instructions…………………………………………………………………………………………... 6

3.2 Front Panel Control……………………………………………………………………………….…………... 6

3.3 Adjusting the Picture………………………………………………………………………………………….. 7

4. Input/Output Specification……………………………………………………………………………………...

9

4.1 Input Signal Connector……………………………………………………………………………………….. 9

4.2 Power Supply Requirements………………………………………………………………………………… 10

4.3 Factory Preset Display Modes……………………………………………………………………………….. 11

4.4 Panel Specification………………………………………………………………………………………….… 12

4.4.1 General Description………………………………………………………………………………….…... 12

4.4.1 Display Characteristics…………………………………………………………………………………... 12

4.4.2 Optical Characteristics…………………………………………………………………………………… 13

4.4.3 Electrical Characteristics………………………………………………………………………………… 14

5. Block Diagram………………………………………………………………………………………………….…

15

5.1 Monitor Exploded View………………………………………………………………………….……………. 15

5.2 Software Flowing Chart………………………………………………………………………………….…… 16

5.3 Electrical Block Diagram……………………………………………………………………………………… 18

5.3.1 Main Board………………………………………………………………………………………………... 18

5.3.2 Inverter/Power Board………………………………………………………….…………………………. 19

6. Schematic……………………………………………………………………………………………………….…

20

6.1 Main Board…………………………………………………………………………………………………….. 20

6.2 Power Board…………………………………………………………………………………………………… 26

6.3 Audio Board……………………………………………………………………………………….…………… 30

7. PCB Layout……………………………………………………………………………………………………….

31

7.1 Main Board…………………………………………………………………………………………………….. 31

7.2 Power Board…………………………………………………………………………………………………… 32

7.3 Audio Board…………………………………………………………………………………….……………… 33

7.4 Key Board………………………………………………………………………….…………………………... 33

8. Maintainability…………………………………………………………………………………………………….

34

8.1 Equipments and Tools Requirement………………………………………………………………………… 34

8.2 Trouble Shooting…………………………………………………………………………………………….… 35

8.2.1 Main Board………………………………………………………………………………………………... 35

8.2.2 Inverter/Power Board…………………………………………………………………………………….. 38

8.2.3 Keypad Board…………………………………………………………………………………………….. 40

9. White-Balance, Luminance adjustment………………………………………………………………….…..

41

10. EDID Content…………………………………………………………………………………………………….

43

11. BOM List………………………………………………………………………………………………………...

44

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Revision List

Version Date Revision History TPV Model Name

A00 Mar-15-06 Initial Release T980KH2HDAUSAP

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1. Monitor Specifications

Items Description

Driving system TFT Color LCD

Type HSD190ME13

Size 48.0cm(19.0")

Pixel pitch 0.294mm (H) x 0.294mm (V)

Viewable angle

160(H) 160(V)(CR>5)

LCD Panel

Response time 8 ms

Sync. Type H/V TTL

15Pin Analog

Input Signal

24Pin Digital

H-Frequency 30kHz – 80kHz

Input

V-Frequency 55-75Hz

ON Mode <55W

Power Consumption

OFF Mode

<2W

Display Color 16.2M (6-bits+FRC)

Contrast Ratio 700:1

Dot Clock 135MHz

White Luminance 300cd/m

2

Max. Resolution 1280 x1024

Plug & Play VESA DDC2BTM

Power Source 100~240VAC,47~63Hz

Maximum Screen Size

Horizontal : 376.32mm

Vertical: 301.056mm

Environmental

Conditions

Operating Temp: 0°C to 35°C

Storage Temp: -20°C to 60°C

Operating Humidity: 45% to 85%

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2. LCD Monitor Description

The LCD MONITOR will contain a main board, a power board, a keypad board and an audio board which house the

flat panel control logic, brightness control logic and DDC.

The power board will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips

each voltage.

Video signal, DDC

CCFT Drive.

PWPC Board

(

Include Adapter and Inverter)

Flat Panel and

CCFL backlight

Main Board

RS232 Connector

For white balance

adjustment in factory

mode

HOST Computer

AC-IN

100V-240V

Monitor Block Diagram

Audio board Keyboard

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3. Operating Instructions

3.1 General Instructions

Press the power button to turn the monitor on or off. The other control buttons are located in front panel of the

monitor. By changing these settings, the picture can be adjusted to your personal preferences.

• The power cord should be connected.

• Connect the video cable from the monitor to the video card.

• Press the power button to turn on the monitor position. The power indicator will light up.

3.2 Front Panel Control

- Power Button:

When pressed, the monitor enters the off mode, and the LED turns blank. Press again to restore normal status.

- Left / Right Button:

The Left/Right Button is used to control the monitor functions. Press to switch functions or adjust settings.

- Auto Adjust Key:

The Auto Adjust Key is used to automatically set the H Position, V Position, Clock and Phase.

- Power Indicator:

Blue — Power On mode.

Amber

— Power Saving mode.

Dark

—Power Off Mode.

NO. Name

Within OSD

Without OSD

①

Splendid Button Exit OSD or back to previous menu

1.Activate Scenario selection menu.

2. Automatically adjust the image to its

optimized position, clock, and phase by

pressing the button for 2 seconds.

② - /

Button

Decrease the level of the function select

or move to the previous function.

Activate Volume adjustment menu

③

Power Button

Switch the LCD monitor on or off.

Blue:

normal operation mode

.

Amber: power saving mode.

Dark:

power off mode

Switch the LCD monitor on or off.

Blue:

normal operation mode

.

Amber: power saving mode.

Dark:

power off mode

④ +/ Button

Increase the level of the function select

or move to the next function.

Activate Brightness adjustment menu.

⑤

Menu Button Enter/select the icon highlighted . Activate the OSD main menu.

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3.3 Adjusting The Picture

Adjustment steps:

1. Press the MENU-button to activate the OSD window.

2. Press < or > to select the desired function.

3. Press the MENU-button to select the function that you want to adjust.

4. Press < or > to change the settings of the current function.

5. To exit and save, select the exit function, or leave the monitor alone for 10 seconds. If you want to adjust any

other function, repeat steps 2-4.

OSD TABLE:

Main Menu

Item

Main Menu

Icon

Sub Menu Item

Sub Menu

Icon

Description

Scenery Mode

Advance for scenery use with Splendid™ Video

Enhancement

Text Mode

Advance for generic Windows use (Splendid™ Off)

Theater Mode

Advance for movie use with Splendid™ Video

Enhancement

Game Mode

Advance for game use with Splendid™ Video

Enhancement

Scenario

Night Mode

Advance for dark-display use with Splendid™ Video

Enhancement

R

Adjust red gain

G

Adjust green gain

RGB

B

Adjust blue gain

Reddish Select yeddish skin stone

Color

Skin Tone

Natural

Select natural skin stone

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Yellowish

Select yellowish skin stone

Cool

The image appears bluer.

(9300°K)

Normal

Normal image color. (7500°K)

Color

Temperature

Warm

The image appears redder.

(6500°K)

Brightness

Adjust the brightness level

Luminance

Contrast

Adjust the contrast level

H-Position

Adjust the horizontal position of the OSD

V-Position

Adjust the vertical position of the OSD

OSD Setup

OSD Timeout

Adjust the OSD timeout

Phase

Adjust the image Phase to

reduce Horizontal-line noise of

the image

Focus

Clock

Adjust the image Clock to

reduce Vertical-line noise of the

image

H-Position

Adjust the horizontal position of

the image

Image Position

V-Position

Adjust the vertical position of

the image

Image Setup

Auto

Auto adjust the horizontal/vertical positions, phase

and clock of the image

Input Select

Select an input signal from analog/digital source

Information

Show the resolution, H/V frequency and input port of current input timing

Language

Select the language you like

Reset

Recall factory setting

Exit

Exit OSD

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4. Input/Output Specification

4.1 Input Signal Connector

Analog Connector

Pin No. Description Pin No. Description

1.

Red

9.

+5V

2.

Green

10.

Logic Ground

3.

Blue

11.

Monitor Ground

4.

Monitor Ground

12.

DDC-Serial Data

5.

DDC-Return

13.

H-Sync

6.

R-Ground

14.

V-Syn c

7.

G-Ground

15.

DDC-Serial Clock

8.

B-Ground

VGA connector layout

15

6

10

11 15

Digital Connector

Pin Meaning Pin Meaning Pin Meaning

1. TMDS Data2- 9. TMDS Data1- 17. TMDS Data0-

2. TMDS Data2+ 10. TMDS Data1+ 18. TMDS Data0+

3. TMDS Data 2/4 Shield 11. TMDS Data 1/3 Shield 19. TMDS Data 0/5 Shield

4. TMDS Data4- 12. TMDS Data3- 20. TMDS Data5-

5. TMDS Data4+ 13. TMDS Data3+ 21. TMDS Data5+

6. DDC Clock 14. +5V Power 22. TMDS Clock Shield

7. DDC Data 15. Ground(for+5V) 23. TMDS Clock+

8. N.C. 16. Hot Plug Detect 24. DDC TMDS Clock-

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4.2 Power Supply Requirement

A/C Line voltage range : 100 V ~ 240 V

A/C Line frequency range

: 50 ± 3Hz, 60 ± 3Hz

Input Current : 1.5A max at 100V; 0.8A max at 240 V

Peak surge current

: < 60A peak at 240 VAC and cold starting

< 30A peak at 120VAC and cold starting

Leakage current : < 3.5mA

Power line surge

: No advance effects (no loss of information or defect)

with a maximum of 1 half-wave missing per second

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4.3 Factory Preset Display Modes

VESA MODES

Horizontal Vertical

Mode Resolution Total

Nominal

Frequency

+/- 0.5kHz

Sync

Polarity

Nominal

Freq.

+/- 1 Hz

Sync

Polarity

Nominal

Pixel

Clock

(MHz)

640x480@60Hz 800 x 525 31.469 N 59.940 N 25.175

640x480@72Hz 832 x 520 37.861 N 72.809 N 31.500

VGA

640x480@75Hz 840 x 500 37.500 N 75.00 N 31.500

800x600@56Hz 1024 x 625 35.156 N/P 56.250 N/P 36.000

800x600@60Hz 1056 x 628 37.879 P 60.317 P 40.000

800x600@72Hz 1040 x 666 48.077 P 72.188 P 50.000

SVGA

800x600@75Hz 1056x625 46.875 P 75.000 P 49.500

1024x768@60Hz 1344x806 48.363 N 60.004 N 65.000

1024x768@70Hz 1328x806 56.476 N 70.069 N 75.000

1024x768@75Hz 1312x800 60.023 P 75.029 P 78.750

XGA

1024x768@72Hz 1304x798 57.7 P 72 P 78.4

1152x864@75Hz 1600x900 67.5 P 75 P 108

1280x1024@60Hz 1688x1066 63.981 P 60.020 P 108.000

1280x1024@75Hz 1688x1066 79.976 P 75.025 P 135.000

1280x960@60Hz 1800x1000 60 P 60 P 108

1280x1024@70Hz 74.4 P 70 P 124.9

SXGA

1280x1024@72Hz 77.9 P 72 P 134.6

IBM MODES

Horizontal Vertical

Mode Resolution Total

Nominal

Frequency

+/- 0.5kHz

Sync

Polarity

Nominal

Freq.

+/- 1 Hz

Sync

Polarity

Nominal

Pixel

Clock

(MHz)

DOS* 720x400@70Hz 900 x 449 31.469 N 70.087 P 28.322

DOS 640x350@70Hz 800 x 449 31.469 P 70.087 N 25.175

MAC MODES

VGA 640x480@67Hz 864x525 35.000 N 66.667 N 30.240

SVGA 832x624@75Hz 1152x667 49.725 N 74.551 N 57.2832

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4.4 Panel Specification

4.4.1 General Description

z 19”SXGA TFT LCD Panel

z 4 CCFLs Backlight System

z Supported SXGA (V:1024 lines, H:1280 pixels) Resolution

z Supported to 75Hz Refresh Rate

z LCD Timing Controller

z RoHS Compliance

z VESA Compatible

4.4.2 Display Characteristics

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4.4.3 Optical Characteristics

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4.4.4 Electrical Characteristics

1. TFT LCD Module

2. Backlight Unit

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15

5. Block Diagram

5.1 Monitor Exploded View

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5.2 Software Flowing Chart

1

2

N

Y

5

Y

N

10

Y

N

12

Y

N

7

Y

N

6

4

3

8

9

14

11

13

Y

N

15

Y

N

16

17

19

Y

N

18

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REMARK:

1) MCU initialize.

2) Is the EEprom blank?

3) Program the EEprom by default values.

4) Get the PWM value of brightness from EEprom.

5) Is the power key pressed?

6) Clear all global flags.

7) Are the AUTO and SELECT keys pressed?

8) Enter factory mode.

9) Save the power key status into EEprom.

Turn on the LED and set it to green color.

Scalar initialize.

10) In standby mode?

11) Update the lifetime of back light.

12) Check the analog port, are they’re any signals coming?

13) Does the scalar send out an interrupt request?

14) Wake up the scalar.

15) Are there any signals coming from analog port?

16) Display "No connection Check Signal Cable" message. And go into standby mode after the message

disappear.

17) Program the scalar to be able to show the coming mode.

18) Process the OSD display.

19) Read the keyboard. Is the power key pressed?

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5.3 Electrical Block Diagram

5.3.1 Main Board

MCU

MTV512

(U601)

Scalar IC TSU56AWK

(Include ADC, OSD)

(U401)

EEPROM

M24C16

(U602)

D-Sub

Connector

(CN301)

EEPROM

M24C02

(U301)

H sync

V sync

RGB

DB15_SDA,

DB15

_

SCL

EPR_SDA

EPR_SCL

LCD Interface

(CN503)

EEPROM

M24C02

(U302)

DDC2_SDA,

DDC2_SCL

D-Data

D-Clock

Key Board

Control

Crystal

24MHz

(X601)

Crystal

14.318MHz

(X401)

DVI-I only

Connector

(CN302)

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