Asus MM19S, MM19D Service Manual
ASUS MM19S
SERVICE MANUAL
19” LCD MONITOR
MM19S
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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.
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ASUS MM19S
Table of Content
Revision List………………………………………………………………………………………………………….
1. Monitor Description……………………………………………………………………………………………..
2. LCD Monitor Description………………………………………………………………………………………..
3. Operating Instructions…………………………………………………………………………………………..
3.1 General Instructions…………………………………………………………………………………………... 6
3.2 Front Panel Control……………………………………………………………………………….…………... 6
3.3 Adjusting the Picture………………………………………………………………………………………….. 7
4. Input/Output Specification……………………………………………………………………………………...
4.1 Input Signal Connector……………………………………………………………………………………….. 9
4.2 Power Supply Requirements………………………………………………………………………………… 9
4.3 Factory Preset Display Modes……………………………………………………………………………….. 10
4.4 Panel Specification………………………………………………………………………………………….… 11
4.4.1 General Description………………………………………………………………………………….…... 11
4.4.1 Display Characteristics…………………………………………………………………………………... 11
4.4.2 Optical Characteristics…………………………………………………………………………………… 12
4.4.3 Electrical Characteristics………………………………………………………………………………… 13
5. Block Diagram………………………………………………………………………………………………….…
5.1 Monitor Exploded View………………………………………………………………………….……………. 14
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4
5
6
9
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5.2 Software Flowing Chart………………………………………………………………………………….…… 15
5.3 Electrical Block Diagram……………………………………………………………………………………… 17
5.3.1 Main Board………………………………………………………………………………………………... 17
5.3.2 Inverter/Power Board………………………………………………………….…………………………. 18
6. Schematic……………………………………………………………………………………………………….…
6.1 Main Board…………………………………………………………………………………………………….. 19
6.2 Power Board…………………………………………………………………………………………………… 25
6.3 Audio Board……………………………………………………………………………………….…………… 29
7. PCB Layout……………………………………………………………………………………………………….
7.1 Main Board…………………………………………………………………………………………………….. 30
7.2 Power Board…………………………………………………………………………………………………… 31
7.3 Audio Board…………………………………………………………………………………….……………… 32
7.4 Key Board………………………………………………………………………….…………………………... 32
8. Maintainability…………………………………………………………………………………………………….
8.1 Equipments and Tools Requirement………………………………………………………………………… 33
8.2 Trouble Shooting…………………………………………………………………………………………….… 34
8.2.1 Main Board………………………………………………………………………………………………... 34
8.2.2 Inverter/Power Board…………………………………………………………………………………….. 37
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33
8.2.3 Keypad Board…………………………………………………………………………………………….. 39
9. White-Balance, Luminance adjustment………………………………………………………………….…..
10. EDID Content…………………………………………………………………………………………………….
11. BOM List………………………………………………………………………………………………………...
12. Different Parts List …………………………………………………………………………………………….
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ASUS MM19S
Revision List
Version Date Revision History TPV Model Name
A00 Apr-17-06 Initial Release T980KH4DBAUSAP
A01 Jul-20-06 Add TPV model T980KH4DKAUSAP in Item 12 T980KH4DKAUSAP
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ASUS MM19S
1. Monitor Specifications
Items Description
Driving system TFT Color LCD
Type HSD190ME13
Size 48.0cm(19.0")
LCD Panel
Pixel pitch 0.294mm (H) x 0.294mm (V)
Viewable angle
Response time 8 ms
Sync. Type H/V TTL
Input Signal 15Pin Analog
Input
H-Frequency 30kHz – 80kHz
V-Frequency 55-75Hz
ON Mode <55W
Power Consumption
OFF Mode
Display Color 16.2M (6-bits+FRC)
Contrast Ratio 700:1
Dot Clock 135MHz
White Luminance 300cd/m
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160(H) 160(V)(CR>5)
<2W
Max. Resolution 1280 x1024
Plug & Play VESA DDC2BTM
Power Source 100~240VAC,47~63Hz
Maximum Screen Size
Environmental
Conditions
Horizontal : 376.32mm
Vertical: 301.056mm
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Operating Temp: 0°C to 35°C
Storage Temp: -20°C to 60°C
Operating Humidity: 45% to 85%
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
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ASUS MM19S
(
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.
Include Adapter and Inverter)
Power Board
AC-IN
100V-240V
Monitor Block Diagram
CCFT Drive.
Audio board
Flat Panel and
CCFL backlight
Main Board
Key board
RS232 Connector
For white balance
adjustment in factory
mode
Video signal, DDC
Host Computer
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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.
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ASUS MM19S
• 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
①
② - /
③
④ +/ Button
⑤
Splendid Button Exit OSD or back to previous menu
Button
Power Button
Menu Button Enter/select the icon highlighted. Activate the OSD main menu.
Decrease the level of the function select
or move to the previous function.
Switch the LCD monitor on or off.
Blue:
normal operation mode
Amber: power saving mode.
Dark:
power off mode
Increase the level of the function select
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or move to the next function.
Within OSD
1.Activate Scenario selection menu.
2. Automatically adjust the image to its
optimized position, clock, and phase by
pressing the button for 2 seconds.
Activate Volume adjustment menu
Switch the LCD monitor on or off.
.
Blue:
normal operation mode
Amber: power saving mode.
Dark:
power off mode
Activate Brightness adjustment menu.
Without OSD
.
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.
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ASUS MM19S
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
Scenario
Color
Main Menu
Icon
Sub Menu Item
Scenery Mode
Text Mode
Theater Mode
Game Mode
Night Mode
RGB
Sub Menu
Icon
Description
Advance for scenery use with Splendid™ Video
Enhancement
Advance for generic Windows use (Splendid™ Off)
Advance for movie use with Splendid™ Video
Enhancement
Advance for game use with Splendid™ Video
Enhancement
Advance for dark-display use with Splendid™ Video
Enhancement
Adjust red gain
R
Adjust green gain
G
B
Adjust blue gain
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Reddish Select yeddish skin stone
Skin Tone
Color
Temperature
Natural Select natural skin stone
Yellowish
Cool
Normal
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Select yellowish skin stone
The image appears bluer.
(9300°K)
Normal image color. (7500°K)
ASUS MM19S
Luminance
OSD Setup
Brightness
Contrast
H-Position
V-Position
OSD Timeout
Focus
Warm
Adjust the brightness level
Adjust the contrast level
Adjust the horizontal position of the OSD
Adjust the vertical position of the OSD
Adjust the OSD timeout
Phase
The image appears redder.
(6500°K)
Adjust the image Phase to
reduce Horizontal-line noise of
the image
Adjust the image Clock to
Image Setup
Information
Language
Reset
Exit
Clock
Image Position
Auto
Show the resolution, H/V frequency and input port of current input timing
Select the language you like
Recall factory setting
Exit OSD
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H-Position
V-Position
Auto adjust the horizontal/vertical positions, phase
and clock of the image
reduce Vertical-line noise of the
image
Adjust the horizontal position of
the image
Adjust the vertical position of
the image
4. Input/Output Specification
4.1 Input Signal Connector
Analog Connector
Pin No. Description Pin No. Description
1.
2.
3.
Red
Green
Blue
8
9.
10.
11.
+5V
Logic Ground
Monitor Ground
ASUS MM19S
4.
5.
6.
7.
8.
Monitor Ground
DDC-Return
R-Ground
G-Ground
B-Ground
4.2 Power Supply Requirement
A/C Line voltage range : 100 V ~ 240 V
A/C Line frequency range
Input Current : 1.5A max at 100V; 0.8A max at 240 V
Peak surge current
12.
13.
14.
15.
VGA connector layout
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: 50 ± 3Hz, 60 ± 3Hz
: < 60A peak at 240 VAC and cold starting
< 30A peak at 120VAC and cold starting
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DDC-Serial Data
DDC-Serial Clock
H-Sync
V-Sync
Leakage current : < 3.5mA
Power line surge
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: No advance effects (no loss of information or defect)
with a maximum of 1 half-wave missing per second
4.3 Factory Preset Display Modes
VESA MODES
Horizontal Vertical
Nominal
Frequency
Mode Resolution Total
+/- 0.5kHz
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Sync
Polarity
Nominal
Freq.
+/- 1 Hz
Sync
Polarity
Nominal
Pixel
Clock
(MHz)
ASUS MM19S
640x480@60Hz 800 x 525 31.469 N 59.940 N 25.175
VGA
SVGA
XGA
SXGA
640x480@72Hz 832 x 520 37.861 N 72.809 N 31.500
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
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
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
1280x1024@72Hz 77.9 P 72 P 134.6
IBM MODES
Horizontal Vertical
Nominal
Mode Resolution Total
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
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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Frequency
+/- 0.5kHz
MAC MODES
Sync
Polarity
Nominal
Sync
Freq.
Polarity
+/- 1 Hz
Nominal
Pixel
Clock
(MHz)
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
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ASUS MM19S
z RoHS Compliance
z VESA Compatible
4.4.2 Display Characteristics
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ASUS MM19S
4.4.3 Optical Characteristics
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ASUS MM19S
4.4.4 Electrical Characteristics
1. TFT LCD Module
2. Backlight Unit
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5. Block Diagram
5.1 Monitor Exploded View
ASUS MM19S
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5.2 Software Flowing Chart
ASUS MM19S
1
Y
2
N
4
3
N
10
12
5
Y
6
7
9
Y
N
N
Y
N
8
11
13
N
Y
14
15
Y
N
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Y
17
18
N
19
Y
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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.
ASUS MM19S
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
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5.3.1 Main Board
ASUS MM19S
EPR_SDA
EPR_SCL
EEPROM
M24C16
(U602)
Crystal
24MHz
(X601)
MCU
W79E632
(U601)
Key Board
Control
Scalar IC TSU16AWK
(Include ADC, OSD)
Crystal
14.318MHz
LCD Interface
(CN503)
(U401)
H sync
V sync
RGB
D-Sub
Connector
(X401)
(CN301)
DB15_SDA,
DB15
EEPROM
M24C02
(U301)
SCL
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5.3.2 Inverter/Power Board
AC input
Lamp
EMI filter
Start Circuit
R906, R907
Control IC
OSC and
Output
Circuit
Feedback
Circuit
Bridge
Rectifier
and Filter
PWM
Over
Voltage
Protect
DC Convert
Circuit
Transformer
Over
Voltage
Protect
PWM
Control IC
ASUS MM19S
Rectifier
diodes
CN902
Feedback
Circuit
MOSFET
IC101
12V
ON/OFF
Control
DIM
5V
ON/OFF
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