Asus MW221 series User manual
22" LCD Color Monitor ASUS MW221
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…..…...................…………................15
5.1.Software Flow Chart……..…………………....….......15
5.2.Electrical Block Diagram……………..….......17
6.Schematic……………......................................19
6.1 Main Board.............................................19
6.2 Power Board....……....................................23
7.PCB Layout..………….......................................25
7.1.Main Board………........................................25
7.2.Power Board….......................................28
7.3 Audio Board....………....................................31
7.4.Key Board…………….....................................31
8.Maintainability……….......................................32
8.1.Equipments and Tools Requirement...............32
8.2.Trouble Shooting…………..............................33
9.White-Balance, Luminance adjustment.............39
10.Monitor Explode View………..…….…............41
11.BOM List…………………………………............42
12.Different Parts List………………………………58
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
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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.)
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1. Monitor Specifications
Driving system TFT Color LCD
Size 55.87cm(22")
Pixel pitch 0.282mm( H )x 0.282mm( V )
Response time (type) 5ms for CMO panel
Viewable angle 170˚(H) 160˚(V)
LCD Panel
Video R,G,B Analog Interface
Sync. Type H/V TTL
H-Frequency 30kHz – 83kHz
Input
V-Frequency 56-76Hz
ON Mode <65W
Power Consumption
OFF Mode <2W
Display Color 16.7M
Dot Clock 165MHz
Contrast Ratio 700:1
White Luminance 300cd/m2
Max. Resolution 1680 x 1050
Plug & Play VESA DDC2BTM
Power Source 100~240VAC,47~63Hz
Input Connector D-Sub 15pin
Input Video Signal Analog:0.7Vp-p(standard),75 OHM, Positive
Safety Certifications UL/CUL , FCC, CE, Gost-R, BSMI,CCC,VCCI,C-Tick, CB, RoHS required
Maximum Screen Size Horizontal : 473.76mm
Vertical: 296.1mm
Environmental
Considerations
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, 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
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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 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
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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. Detect Cable
3. Blue Video 11. NC
4. NC 12. DDC-Serial Data
5. GND 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
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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
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22" LCD Color Monitor ASUS MW221
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4.4 Panel Specification
4.4.1 General Features
The M220Z1-L01 model is a 22 inch wide TFT-LCD module with a 4-CCFL Backlight Unit and a 30-pin
2ch-LVDS interface. This module supports 1680 x 1050 WSXGA+ (16:10 wide screen) mode and displays
up to 16.7 millions colors. The inverter module for the Backlight Unit is not built in.
4.4.2 Features
- Super wide viewing angle
- High contrast ratio
- Fast response time
- High color saturation (EBU Like Specifications)
- WSXGA+ (1680 x 1050 pixels) resolution
- DE (Data Enable) only mode
- LVDS (Low Voltage Differential Signaling) interface
4.4.3 Display Characteristics
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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?
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5.2 Electrical Block Diagram
5.2.1 Main Board
EEPROM
M24C02
(U404)
EEPROM
24LC16B/SNG
(U403)
Panel Interface
(CN101)
SDA
SCL
Crystal
14.318MHZ
(X401)
Flash Memory
PM25LV010-25 SCE
(U402)
Scalar TSUMU58WHJ-LF
(Include MCU, ADC, OSD)
(U401)
H sync
V sync
RGB
VGA_SDA,
VGA
_
SCL
D-Sub
Connector
(CN405)
Key Control
Interface
(CN403)
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5.2.2 Inverter/Power Board
CN903
DIM
DIM
EMI filter
Start Circuit: R927、R928、R929
PWM
Control IC
Transformer
AC input
12V
ON/OFF
Control
PWM
Control IC
Feedback
Circuit
Output
Circuit Transformer MOSFET
Over
Voltage
Lamp
ON/OFF
24V
Bridge
Rectifier
and Filter
Feedback
Circuit
Rectifier
diodes
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6. Schematic
6.1 Main Board
715G2186-1
+
C717
100uF/25V
BL_ADJ
D704
SR24
Q703
PMBS3904
C704
NC
R713 NC
VCC3.3 4
+3V3
+3V3
C701
0.1uF
U702
AIC1084-33PM
3
1
2
VIN
ADJ
VOUT
Q704
AO3401
R703
2K 1/10W
R722
NC
TO-263
+3V3
+5V
R716
NC
D701
GS1D
U701
NC
3 2
1
VI VO
GND
CN701
CONN
2
4
6
8
10
12
1
3
5
7
9
11
R701
1K 1/10W
+3V3
VCTRL 4
+
C702
4.7uF/50V VCC1.8 4
+12V
Q706
NC
+5V
R706 NC
R725 4.7K 1/10W
R727
10K 1/10W
GND
GND
GND
GND
+5V
GND
R702
51 1/10W
R710 NC
R712
4.7K 1/10W
Q705
PMBS3906
GND
715G2186-1
B
POWER
Custom
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Size Document Number Rev
Date: Sheet of
+12V
R721
0 1/10W
+
C707
NC
VCC3.3
+5V
R723
10K 1/10W
+12V
+
C710
100uF/25V
R704
100 1/10W
Adj_BACKLIGHT 4
C714
0.1uF
+5V
SOT-223
R707
4.7K 1/10W
R709 15K 1/10W
+5V
L702
120 OHM
1 2
C711
0.1uF
VCC3.3
C715
0.022uF
C718
NC
Reservation schematic-
for blacklight off have
panel on solution.
R714
10K 1/10W
VCC3.3 4
+5V 3,4
Q701
PMBS3904
R705
4.7K 1/10W
R717
10K 1/10W
VLCD
+5V
on_Panel4
VCC1.8
C708
NC
Q702
PZT2907A
R715
NC
C709
0.1uF
C706
0.1uF
R708
10K 1/10W
+
C703
NC
VLCD 5
on_BACKLIGHT 4
C719
0.1uF
+5V
+
C722
22uF/50V
+
C712
100uF/25V
+5V3,4
R711
10K 1/10W
C713
0.1uF
D702
LL4148
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22" LCD Color Monitor ASUS MW221
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D424
BAV99
3
1
2
R457 10K 1/10W
DAT2-
GIN 4
PC5V
U405
M24C02-WMN6TP
1
2
3
45
6
7
8A0
A1
A2
GNDSDA
SCL
WP
VCC
GNDB 4
R468 10 1/10W
D413
BAV70
3
1
2
G+ 4
D406
ZMM5V6
1 2
D425
RLZ36B
1 2
R444
10K 1/10W
C447
0.1uF
GNDR 4
C432 0.047uF
GREEN-
FB409 430 OHM
C445
0.1uF
Q406
NC R461
10K 1/10W
D421
BAV99
3
1
2
B- 4
D415
ZMM5V6
1 2
R466 10 1/10W
C450
0.1uF
R448
2.2K 1/10W
R436 56 1/10W
R434 56 1/10W
D417
BAV99
3
1
2
+5V
R437 470 1/10W
PC5V
SDA_DVI
DAT0+
R469 10 1/10W
DVI5V
R472
NC
R453 100 1/10W
RED+ FB410 0 1/10W
C441
0.047uF
+5V
CLK- 4
DDC_WP 4
D418
BAV99
3
1
2
D412
ZMM5V6
1 2
VSYNC 4
C442
22pF
C438 0.047uF
+5V
RIN 4
HSYNC 4
ESD_5V
B+ 4
SCL_VGA
D414
ZMM5V6
1 2
R471
10K 1/10W
R459
10K 1/10W
C449
0.1uF
DET_DVI 4
DDCA_SCL4
+5V
FB411 0 1/10W
BLUE-
DCLK-
C451
0.1uF
D405
BAV99
3
1
2
R455 100 1/10W
C453
0.1uF
CN405
DB15
1
6
2
7
3
8
4
9
5
11
12
13
14
15
10
1716
D404
BAV99
3
1
2
R470
1K 1/10W
R456 100 1/10W
VSI
R442 100 1/10W
DAT2+
C448
0.1uF
C436 0.047uF
D411
ZMM5V6
1 2
R452
10K 1/10W
+5V
C444
0.1uF
R458 100 1/10W
D419
BAV99
3
1
2
HDCP_RST 4
PC5V
DDCA_SDA4
DAT1- G- 4
R450
10K 1/10W
RED-
C452
0.1uF
DDCD_SDA4
SCL_DVI
R451
10K 1/10W
CN406
JACK
1
2
3
4
5
6
7
8
25
28
9
10
11
12
13
14
15
16
26
29
17
18
19
20
21
22
23
24
27
32
31
DAT2-
DAT2+
2/4shield
DAT4-
DAT4+
DDC SCL
DDC SDA
VSYNC
R
HSYNC
DAT1-
DAT1+
1/3shield
DAT3-
DAT3+
+5V
SYNC GND
HPD
G
RGB GND
DAT0-
DAT0+
0/5shield
DAT5-
DAT5+
clk shield
clk+
clk-
B
GND
GND
R445 100 1/10W
R+ 4
BLUE+
DAT1+
HPD
R446 1K 1/10W
D420
BAV99
3
1
2
BIN 4
C440
0.047uF
DVI5V
R443 100 1/10W
R464 10 1/10W
C434 0.047uF
D403
BAV99
3
1
2
SOG 4
D408
ZMM5V6
1 2
VGA_CON
D410
ZMM5V6
1 2
R454 100 1/10W
U404
M24C02-WMN6TP
1
2
3
45
6
7
8A0
A1
A2
GNDSDA
SCL
WP
VCC
DDCD_SCL4
R401
NC
715G2186-1
DVI5V
C446
0.1uF
R449
2.2K 1/10W
R435 56 1/10W
R439
75 1/10W
D409
ZMM5V6
1 2
D422
BAV99
3
1
2
CLK+ 4
B
INPUT
B
35Thursday , October 12, 2006
Ti t le
Size Document Number Rev
Date: Sheet of
GNDG 4
HSI
R462 10 1/10W
D416
ZMM5V6
1 2
C439
0.047uF
SDA_VGA
R438
75 1/10W
DET_VGA 4
DCLK+
R440
75 1/10W
D423
BAV99
3
1
2
R467 10 1/10W
R- 4
DAT0-
FB412 0 1/10W
C443
220pF
C435 0.001uF
R465 10 1/10W
R447 1K 1/10W
+5V 2,4
R441 100 1/10W
R473
NC
DDC_WP 4
GREEN+
C437 0.047uF
C454
0.1uF
ESD_5V
D426
ZMM5V6
1 2
R463 10 1/10W
R460
10K 1/10W
C433 0.047uF
D407
BAV70
3
1
2
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