Asus MW201U - 20.1" LCD Monitor User manual

20" LCD Color Monitor ASUS MW201U
1
Service
Service
Service
Horizontal Frequency
30-83 KHz
TABLEOFCONTENTS
Description Page Description Page
SAFETY NOTICE
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE
CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING
ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.
Table Of Contents.......……..............................…........1
Revision List.…........................................……......2
Important Safety Notice.……..................……......3
1.Monitor Specification..............................………........4
2.LCD Monitor Description…………………………….......5
3.Operation Instruction…………...............……...........6
3.1.General Instructions...........................…...........6
3.2.Control Button…………….…..............……...............6
3.3.OSD Menu…………….…...........................…............8
4.Input/Output Specification............……………............11
4.1.Input Signal Connector............………….................11
4.2.Factory Preset Display Modes..........................12
4.3.Power Supply Requirements...............................12
4.4.Panel Specification.....………………..................13
5.Block Diagram…..…...................…………................16
5.1.Software Flow Chart……………………....….......16
5.2.Electrical Block Diagram……………..….......18
6.Schematic……………......................................20
6.1.Main Board………..........................................20
6.2.Power Board...……....................................26
7.PCB Layout..………….......................................28
7.1.Main Board………........................................28
7.2.Power Board….......................................31
7.3 Audio Board....………....................................34
7.4.Key Board…………….....................................34
8.Maintainability……….......................................35
8.1.Equipments and Tools Requirement...............35
8.2.Trouble Shooting…………..............................36
9.White-Balance, Luminance adjustment.............42
10.Monitor Explode View………..…….…............44
11.Spare Parts List…………………………............45
12. Different Parts List…………...…………………66
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
http://www.wjel.net

20" LCD Color Monitor ASUS MW201U
2
Revision List
Version Release Date Revision History TPV Model Name
TA6CMUMTW8USAP
TA6CMUMBW8U1AP
TA6CMUMBW8USAP
TA6CMUMCW8USAP
TA6CMUMDW8USAP
A00 Aug.15, 2006 Initial release
TA6CMUMKW8USAP
A01 Feb.08, 2007 Add new BOM in Item 12 TA6CMUMBW8U1AP
http://www.wjel.net

20" LCD Color Monitor ASUS MW201U
3
Important Safety Notice
Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service
procedures recommended by AOC and described in this service manual are effective methods of performing service
operations. Some of these service operations require the use of tools specially designed for the purpose. The
special tools should be used when and as recommended.
It is important to note that this manual contains various CAUTIONS and NOTICES which should be carefully read in
order to minimize the risk of personal injury to service personnel. The possibility exists that improper service
methods may damage the equipment. It is also important to understand that these CAUTIONS and NOTICES ARE
NOT EXHAUSTIVE. AOC could not possibly know, evaluate and advise the service trade of all conceivable ways in
which service might be done or of the possible hazardous consequences of each way. Consequently, AOC has not
undertaken any such broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is not
recommended by AOC must first satisfy himself thoroughly that neither his safety nor the safe operation of the
equipment will be jeopardized by the service method selected.
Hereafter throughout this manual, AOC Company will be referred to as AOC.
WARNING
Use of substitute replacement parts, which do not have the same, specified safety characteristics may create shock,
fire, or other hazards.
Under no circumstances should the original design be modified or altered without written permission from AOC.
AOC assumes no liability, express or implied, arising out of any unauthorized modification of design.
Servicer assumes all liability.
FOR PRODUCTS CONTAINING LASER:
DANGER-Invisible laser radiation when open AVOID DIRECT EXPOSURE TO BEAM.
CAUTION-Use of controls or adjustments or performance of procedures other than those specified herein may
result in hazardous radiation exposure.
CAUTION -The use of optical instruments with this product will increase eye hazard.
TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY ORIGINAL MANUFACTURER'S
REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART NUMBERS IN THE PARTS LIST SECTION OF
THIS SERVICE MANUAL.
Take care during handling the LCD module with backlight unit
-Must mount the module using mounting holes arranged in four corners.
-Do not press on the panel, edge of the frame strongly or electric shock as this will result in damage to the screen.
-Do not scratch or press on the panel with any sharp objects, such as pencil or pen as this may result in damage to
the panel.
-Protect the module from the ESD as it may damage the electronic circuit (C-MOS).
-Make certain that treatment person’s body is grounded through wristband.
-Do not leave the module in high temperature and in areas of high humidity for a long time.
-Avoid contact with water as it may a short circuit within the module.
-If the surface of panel becomes dirty, please wipe it off with a soft material. (Cleaning with a dirty or rough cloth may
damage the panel.)
http://www.wjel.net

20" LCD Color Monitor ASUS MW201U
4
1. Monitor Specifications
Driving system TFT Color LCD
Size 51.11cm(20")
Pixel pitch 0.258mm( H )x 0.258mm( V )
Response time (type) 5ms for CPT panel
Viewable angle 170˚(H) 160˚(V) (CR≥10)
R,G,B Analog Interface
LCD Panel
Video
Digital Interface
Sync. Type H/V TTL
H-Frequency 30kHz – 83kHz
Input
V-Frequency 55-75Hz
ON Mode <65W
Power
Consumption OFF Mode <2W
Display Color 16.7M
Dot Clock 165MHz
Contrast Ratio 800:1
White 300cd/m2
Max. Resolution 1680 x 1050
Plug & Play VESA DDC2BTM
Power Source 100~240VAC,47~63Hz
Weight (N. W.) 5.7kg
D-Sub 15pin
Input Connector
DVI 24pin
Analog:0.7Vp-p(standard),75 OHM, Positive
Input Video
Signal Digital signal
Safety
Certifications UL/CUL , FCC, CE, Gost-R, BSMI,CCC,VCCI,C-Tick, CB, RoHS required
Maximum
Screen Size
Horizontal : 433.44mm
Vertical: 270.9mm
Environmental
Considerations
Operating Temp: 0°C to 35°C
Storage Temp: -20°C to 60°C
Operating Humidity: 45% to 85%
http://www.wjel.net

20" LCD Color Monitor ASUS MW201U
5
2. LCD Monitor Description
The LCD monitor will contain a main board, a power board, an audio board and a key 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.
AC-IN
100V-240V
Power board
(
Include: ada
p
ter, inverter
)
Flat Panel and
CCFL backlight
Main Board RS232 Connector
For white balance
adjustment in factory
mode
CCFL Drive.
Video signal, DDC
Monitor Block Diagram
Key Board
Audio Board
HOST Computer
http://www.wjel.net

20" LCD Color Monitor ASUS MW201U
6
3. Operating Instructions
3.1 General Instructions
Press the power button to turn the monitor on or off. The other control buttons are located at the front of the
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, the power indicator will light up.
3.2 Control Buttons
3.2.1 Key Control
http://www.wjel.net

20" LCD Color Monitor ASUS MW201U
7
3.2.2 Key Function
http://www.wjel.net

20" LCD Color Monitor ASUS MW201U
8
3.3 OSD Menu
3.3.1 How to Reconfigure
3.1.2 OSD Function Introduction
http://www.wjel.net

20" LCD Color Monitor ASUS MW201U
9
http://www.wjel.net

20" LCD Color Monitor ASUS MW201U
10
http://www.wjel.net

20" LCD Color Monitor ASUS MW201U
11
4. Input/Output Specification
4.1 Input Signal Connector
Analog connectors
Pin No. Description Pin No. Description
1. Red Video 9. +5V
2. Green Video 10. Logic Ground
3. Blue Video 11. Monitor Ground
4. Monitor Ground 12. DDC-Serial Data
5. DDC-Return 13. H-Sync
6. Red Ground 14. V-Sync
7. Green Ground 15. DDC-Serial Clock
8. Blue Ground
VGA connector layout
15
610
11 15
DVI connectors
Pin Meaning Pin Meaning Pin Meaning
1. T2- 9. T1- 17. T0-
2. T2+ 10. T1+ 18. T0+
3. SGND 11. SGND 19. SGND
4. T4- (NC) 12. T3- (NC) 20. T5- (NC)
5. T4+ (NC) 13. T3+ (NC) 21. T5+ (NC)
6. DDC Clock 14. +5V 22. SGND
7. DDC Data 15. GND 23. TC+
8. A_VSY (NC) 16. HPD 24. TC-
http://www.wjel.net

20" LCD Color Monitor ASUS MW201U
12
4.2 Factory Preset Display Modes
4.3 Power Supply Requirements
A/C Line voltage range 100 V ~ 240 V
A/C Line frequency range 50 ±3Hz, 60 ±3Hz
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
http://www.wjel.net

20" LCD Color Monitor ASUS MW201U
13
4.4 Panel Specification
4.4.1 General Features
CLAA201WA07 is 20.1”(51.11cm) color TFT-LCD (Thin Film Transistor Liquid Crystal Display) module composed of
LCD panel, LVDS driver ICs, control circuit and backlight(CCFL, 6 tubes). By applying 8 bit digital data (6bits+FRC),
1680×1050, drived by 5 voltages,16.7M-color images are displayed on the 20.1” diagonal screen. The module
structure is fixed by iron frame,without the inverter for the backlight. Interface of data and control signals is
typ.General specification are summarized in the following table:
http://www.wjel.net

20" LCD Color Monitor ASUS MW201U
14
4.4.2 Optical Characteristics
http://www.wjel.net

20" LCD Color Monitor ASUS MW201U
15
4.4.3 Electrical Characteristics
(1) TFT-LCD
(2) Backlight
http://www.wjel.net

20" LCD Color Monitor ASUS MW201U
16
5. Block Diagram
5.1 Software Flow Chat
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
N16
17
19
Y
N
18
http://www.wjel.net

20" LCD Color Monitor ASUS MW201U
17
1) MCU initialize.
2) Is the EPROM blank?
3) Program the EPROM by default values.
4) Get the PWM value of brightness from EPROM.
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 EPROM.
Turn on the LED and set it to green color.
Scalar initializes.
10) In standby mode?
11) Update the lifetime of back light.
12) Check the analog port, are there 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?
http://www.wjel.net

20" LCD Color Monitor ASUS MW201U
18
5.2 Electrical Block Diagram
5.2.1 Main Board
MCU
MTV416GMV
(U604)
Scalar IC MST9259BH
(Include ADC, OSD)
(U401)
EEPROM
M24C16
(U602)
D-Sub
Connector
(CN201)
EEPROM
M24C02
(U201)
H sync
V sync
RGB
DB_SDA,
DB
_
SCL
EPR_SDA
EPR_SCL
LCD Interface
(CN701)
EEPROM
M24C02
(U202)
DVI_SDA,
DVI_SCL
D-Data
D-Clock
Key Board
Control
(CN602)
Crystal
24MHz
(X601)
Crystal
14.318MHz
(X401)
DVI
Connector
(CN202)
http://www.wjel.net

20" LCD Color Monitor ASUS MW201U
19
5.2.2 Inverter/Power Board
CN903
DIM
DIM
EMI filter
Start Circuit: R904、R932、R933
PWM
Control IC
Transformer
AC input
12V
ON/OFF
Control
PWM
Control IC
Feedback
Circuit
Output
Circuit Transformer MOSFET
Over
Voltage
Lamp
ON/OFF
Over
Voltage
Protect
5V
Bridge
Rectifier
and Filter
Feedback
Circuit
Rectifier
diodes
http://www.wjel.net

20"LCDColorMonitor ASUS MW201U
20
6. Schematic
6.1 Main Board
715G2116-1
R104
4.7K 1/10W
C105
0.1uF
R127
33K 1/10W
GND
D
R103
1K 1/10W
NC
R139 GND
GND
CN101 CONN
2
4
6
8
10
12
14
1
3
5
7
9
11
13
GND
Q101
PMBS3904
GND
L103
2.2UH
C126
0.001uF
+12V
2/2
+
C131
220uF/25V
C139
0.001uF C118
1uF/16V
R112
0 1/10W
R105
10K 1/10W
GND
C130
NC
R136
0 1/10W
GND
+3.3V_SD
+3.3V
+
C112
220uF/25V
Q103
AO3401L
1
3
2
+3.3V
R101
1K 1/10W
R106
0 1/10W
C137
0.001uF
Q107
PMBS3904
C113
0.1uF
R130
15K 1/10W
+5V
VCC5V
R131
31.6K 1/10W
R135 NC
G
+5V
GND
+5V
CN102
CONN
1
2
3
4
5
CLOSE TO U602
GND
PANEL_EN
6
R114
NC
R134
NC
GND
PS ON/OFF
C107
0.1uF
+5V
+ C136
100uF/25V
+1.8V
USB CTRL
+ C102
220uF/25V
47K 1/10W
R108
+5V
BKLT-EN 6
1
C111
0.1uF
+5V_S
USB CTRL
+
C121
22uF/50V
+5V
TO-263
GND
GND
ON_OFF
NCR140
GND
GND
GND
Q105
AO4411L
1
2
3
4
8
7
6
5
S
S
S
G
D
D
D
D
C109
0.1uF
VCC5V
3
GND
GND
GND
+5V
NC
R138
+ C104
220uF/25V
GND
47K 1/10W
R119
GND
R129
0 1/8W
C119
0.022uF
R102
1K 1/10W
For USB
SDRAM_EN6
GND
PowerSav ing-ct rl
R117
10K 1/10W
0 1/10W
R137
VCC12V
Q110
AO3401L
1
3
2
AO3401
C129
0.1uF
+VLC D
R111
100K 1/10W
U105
LM3485
1
4
5
8
2
3
6
7
ISENSE
FB
ADJ
VIN
AGND
N.C
PWGND
PGATE
PWM_DUTY
6
PGATE
+12V
+ C133
220uF/25V
C132
0.1uF
GND
PWM_DUTY
6
Brgihtness
+
C101
22uF/50V
Q106
PMBS3904
+
C110
220uF/25V
05/11/22 modify
PowerSav ing
Q109
NC
L101
120 OHM
1 2
C122
1uF/16V
D101
SR54
R128
22 1/10W
POWER& INV ERT ER
A
MST9259 715G2116
Custom
27Monday , April 24, 2006
Tit le
Size Document Number Rev
Date: Sheet of
GND
S
Q102
PMBS3904
R133
0 1/8W
U101
AIC1084-33PM
3
1
2
VIN
ADJ
VOUT
GND
U106
AIC1084-33M/NC
3
1
2
VIN
ADJ
VOUT
+12V
GND
+5VVCC12V
R115
1K 1/10W
+5V_S
R132
NC
R113
NC
U102
AIC1117-33M
3
1
2
VIN
ADJ
VOUT
PS ON/OFF6
C103
0.1uF
C117
NC
R109
4.7K 1/10W
GND
VCPU
+5V
Q104
PMBS3904
GND
PowerSav ing-ctrl
+12V
GND
R110
NC
+ C108
220uF/25V
C106
0.1uF
TO-252
+3.3V
+3.3AVDD
Q108
AO3401L/NC
1
3
2
2
C128
0.1uF
L102
120 OHM
1 2
GND
C120
0.1uF
R118
4.7K 1/10W
R107
47K 1/10W
R116
1K 1/10W
GND
BKLT-PWM4
USB CTRL6
http://www.wjel.net