Asus VW223 Series User manual

Service Manual
ASUSVW223
1
LCD Monitor Service Manual
Model:ASUSVW223
V1.0
RESTRICTIONSONUSE OFMATERIALS
:

Service ManualASUSVW223
2
Index
Description Page
Revision List. ........................................ ........................................................................3
ImportantSafetyNotice. .................. ..........................................................................4
1.MonitorSpecification.............................. ..............................................6
2.Operation Instruction ............... ...................................................................... 7
2.1.GeneralInstructions........................... .................................. .................................... 7
2.2.ControlButton ............... ...................................................... ............ 7
3.Input/OutputSpecification............ .....................................................................9
3.1.InputSignalConnector............ .............................................................. .........9
3.2.FactoryPresetDisplayModes............................................................................. .......... 9
3.3.PanelSpecification .......................................... ............................. ....... 11
4.BlockDiagram .. ..................... ...................................................................... 18
5.SchematicDiagram .... ........................................................................ 19
5.1.MainBoard ................................................................................................. ........19
5.2.PowerBoard... .................................................................................................... .26
5.3.KeyBoard............................................................................. .............29
6.PCBLayout.. ........................................................................................................29
6.1.MainBoard ........................................................................................................30
6.2.PowerBoard ............................................................................................................33
6.3.KeyBoard .................................... ......................................................... 39
7.Disassemble&AssembleSOP.. .. ...............................................................40
7.1Procaution ......................................................................................................40
7.2SuggestTools ........... ................................. ............................ ...40
7.3DisassemblyProcedure ............................................................41
7.4AssembleProcedure 48
8.Maintainability 55
8.1 EquipmentsandToolsRequirement .55
8.2TroubleShooting ......... ....................................................................55
9.Color/WhitebalanceAdjustment ....................................................................61
10.Exploded View .. .........................................................................63
11.BOMlist .........................................................................64
12.Differentpartslist ........................................................................ 101

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3
RevisionList
Version Date RevisionHistory Customer Model TPV Model Name
TC8MRGNTWAUSAZ
TC8MRGNTWAUSAZND
TC8MRGNDWAUAAZ
TC8MRGNKWAUSANN
TC8MRGNBWAUS8NN
TC8MRGNBWAUSANN
TC8MRGNCWAUSDZN
VW223T
TC8MRGNKWAUSAN2
TC8MRLNDWAUSAZN
TC8MRLDBWAUSNNN
TC8MRLNTWAUBAZ
TC8MRLDCWAUANNN
TC8MRLDKWAUANNN
VW223B
TC8MRGNTWAUAAZ2
TC8MRGNTWAUAAZ
VW223S TC8MRGNTWAUAAZND
TC8MRGNBWAUANNN
VW223N TC8MRGNBWAUANNN
TC8MRGNBWAUSA
TC8MRGNBWAUAANN
TC8MRGNTWAUANZ
A00 Aug-20-2008 Initialrelease
VW223D
TC8MRGNBWAUAAN2
A01 Oct-10-2008 Update BOMand add
differentpartslist
Add audiodiagram
updateBOMList
VW223D-CN TC8MRLDDWAUANZN
A02 Dec-05-2008 Add
VW223S-CN TC8MRLDDWAUAAZN

Service ManualASUSVW223
4
ImportantSafetyNotice
SAFETYNOTICE
ANYPERSONATTEMPTINGTOSERVICETHISCHASSISMUSTFAMILIARIZEHIMSELFWITHTHECHASSIS
AND BEAWAREOFTHENECESSARYSAFETYPRECAUTIONSTO BEUSEDWHENSERVICING
ELECTRONICEQUIPMENTCONTAINING HIGHVOLTAGES.
Properserviceand repairisimportanttothe safe, reliableoperationofallAOCCompanyEquipment.Theservice
proceduresrecommended byAOCand described inthisservicemanual areeffectivemethodsofperforming service
operations. Someof theseserviceoperationsrequirethe useoftoolsspeciallydesigned forthe purpose. The
specialtoolsshouldbe used whenand asrecommended.
It isimportanttonotethatthismanual containsvariousCAUTIONSand NOTICESwhichshouldbe carefullyread in
ordertominimizethe riskof personalinjury toservicepersonnel.The possibilityexiststhat improperservice
methodsmaydamage the equipment. Itisalsoimportant tounderstand that theseCAUTIONSand NOTICESARE
NOTEXHAUSTIVE.AOCcouldnot possiblyknow, evaluateand advisethe servicetrade ofallconceivablewaysin
whichservicemight be done orof the possiblehazardousconsequencesofeachway. Consequently,AOChasnot
undertaken anysuchbroad evaluation.Accordingly, aservicerwho usesaserviceprocedureortoolwhichisnot
recommended byAOCmustfirst satisfyhimselfthoroughlythat neitherhissafetynorthe safeoperationofthe
equipmentwillbejeopardized bythe servicemethod selected.
Hereafterthroughout thismanual,AOCCompanywillbereferred toasAOC.
WARNING
Useofsubstitutereplacement parts, whichdo not havethe same,specified safetycharacteristicsmight create
shock, fire, orotherhazards.
Underno circumstancesshouldthe originaldesign be modified oraltered withoutwrittenpermission fromAOC.
AOCassumesno liability,express orimplied,arising out ofanyunauthorized modification of design.
Servicerassumesall liability.
FORPRODUCTSCONTAINING LASER:
DANGER-Invisiblelaserradiationswhen open AVOIDDIRECTEXPOSURETO BEAM.
CAUTION-Useof controlsoradjustmentsorperformanceofproceduresotherthan thosespecified hereinmay
result inhazardousradiation exposure.
CAUTION-The useof optical instrumentswiththisproduct willincreaseeyehazard.
TOENSURETHECONTINUEDRELIABILITYOF THISPRODUCT, USEONLYORIGINALMANUFACTURER'S
REPLACEMENTPARTS, WHICH ARELISTEDWITHTHEIRPARTNUMBERSINTHEPARTSLIST SECTIONOF
THISSERVICEMANUAL.
Takecareduring handling the LCD modulewithbacklight unit
-Mustmount the moduleusing mounting holesarranged infourcorners.
-Do not press on the panel, edge of the framestronglyorelectricshock asthiswillresultindamage tothe screen.
-Do not scratchorpress on the panelwithanysharpobjects, suchaspencil orpen asthismayresult indamage to
the panel.
-Protectthe modulefromthe ESDasitmaydamage theelectroniccircuit (C-MOS).
-Makecertainthattreatment person’sbodyisgroundedthrough wristband.
-Do notleavethe moduleinhigh temperatureand inareasofhigh humidityforalong time.
-Avoidcontactwithwaterasit mayashort circuit withinthe module.
-Ifthe surfaceofpanelbecomesdirty,pleasewipe itoffwithasoft material.(Cleaning withadirtyorrough clothmay
damagethepanel.)
CAUTION: USE ASEPARATEISOLATIONTRANSFOMERFORTHISUNITWHENSERVICING

Service Manual
ASUSVW223
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1.MonitorSpecification
Item Specification Unit
ActiveArea 473.76 (H)x296.1(V) (22”wide diagonal) mm
DriverElement a-siTFT ActiveMatrix -
PixelNumber 1680 xR.G.B.x1050 pixel
PixelPitch 0.282 (H)x0.282 (V) mm
PixelArrangement RGBVerticalStripe -
DisplayColor 16.7M color
TransmissiveMode NormallyWhite -
Viewing Angle(H/V) Typical 170 /160 degree
Brightness Typical (300) cd/m2
Contrast Ratio Typical (1000) -
LCD panel
LC ResponseTime(Tr+Tf) 5(Tr: 1.3+Tf:3.7) msec
SeparateSync. TTLLevel -
HorizontalSync. Positive/ Negative -
Vertical Sync. Positive/ Negative -
Graphic
Input Connector D-SUB/ DVI(optional)/ USB(optional) -
AutoAdjust Clock,Phase, HPosition &VPosition -
Screen Scaling VGA/SVGA/XGA/SXGA/WXGA+/WSXGA+FullScreen -
PowerManagement VESADPMS, DVI DMPMCompliance -
ColorAdjustment User, 6500K, 7500K&9300K -
Performance OSDLanguage English,German,Italian,French, Dutch, Spanish,
Russian,Traditional Chinese, Simplified Chinese,
Japanese -
PowerInput AC100~240 (Worldwide) V
Inputfrequency 50 ~60 Hz
Input Current 1600(max) mA
Powersource
Efficiency ACinput100VAC 80% (min)
Operation Mode 50Wmax W
PowerSaving Sleep Mode <1.5W W
Powerconsumption
PowerSaving OFFMode <1W W
Tilt angle Upward/ Downward +25°/ -5°degree
Physical Dimension, weight 511.56 x402.95 x210 (WxHxT),
4.85 / 4.924 (VW223B) mm,kg
DDC Plug &Play DDC 2B/CI Compliance -
Keypad 6keys -
AudioAmplifierOutput 1.0W/ch(max)@1Vrms, 1kHzsine wav -
Function
SpeakerRating 8ohms, 1W/ch(max.)

Service ManualASUSVW223
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ElectricalSpecifications
Item Description
Input System RGBSeparate
Signal Level Analog RGB(0.7VP-P)/ Digital (DVI)/USB2.0
Input Impedance Analog RGB=75 /Digital (DVI)=100
Signal Level Analog RGBSeparateSync:TTL
Compliant Timing See Appendix1.
Input Connector 15 pinsminiD-Sub,DVI24pins,USB B-type and A-type4pins
GraphicSignal
Video Frequency
Bandwidth Analog RGB165MHzdotclock Digital165 MHzdotclock
480 MbpsHi-SpeedMode
Signal Level 1Vrms
Input Impedance 47kAudioSignal Input Connector d=3.5mm Mini-jack
HorizontalSync. 30~82kHz
Synchronization Frequency Vertical Sync. 56 ~76Hz
Input Voltage AC100~240V(Worldwide)
Frequency 50 / 60Hz
PowerConsumption 55Wmax/ 65Wmax (forVW223B)
PowerSupply PowerManagement 2W(max)
LampType ColdCathode Fluorescent Lamp
LampQuantity 4pcs
Backlight LampLifeTime 50,000 Hrs(IL=7.0mA)(min)
DDC Plug &Play VESADDC 2B/CI Compliance
PowerManagement VESADPMS, DVI DMPM Compliance
PowerManagement Status PowerConsumption Screen RecoveryTime
Stand-by
Suspend <1.5W@240VAC50Hz
Active-off <1W@240VAC50Hz
Within5sec

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2. Operation Instructions
2.1General Instructions
Press the powerbutton toturnthe monitoron oroff. Theothercontrolknobsarelocated atfrontpanelofthe monitor
(See Figure).Bychanging thesesettings, the picturecan be adjusted toyourpersonalpreferences.
*The powercordshouldbe connected.
*Press the powerbutton toturnon the monitor.The powerindicatorwilllightup.
2.2Control Button
2.2.1 ExternalControls
Front:

Service ManualASUSVW223
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2.2.2Attaching theCables

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3. Input/OutputSpecification
3.1InputSignalConnector
D-Submini15pin Connector
PinNumber 15-Pin SideoftheSignal Cable
1 Red video input
2 Green video input
3 Blue video input
4 NC
5 Ground
6 Red video ground
7 Green video ground
8 Blue video ground
9 NC
10 Ground
11 No connection
12 (SDA)
13 Horizontal sync(Compositesync)
14 Vertical sync
15 (SCL)

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DVI-D24pinConnector
PinNo. Signal Name PinNo. Signal Name PinNo. Signal Name
1 TMDSData2- 9 T.M.D.SData1- 17 T.M.D.SData0-
2 TMDSData2+ 10 T.M.D.SData1+ 18 TMDSData0+
3 T.M.D.SData2Ground 11 T.M.D.SData1Ground 19 T.M.D.SData0
Ground
4 NC 12 NC 20 NC
5 NC 13 NC 21 NC
6 Clock line (SCL) 14 NC 22 T.M.D.SClockGround
7 Dataline (SDA) 15 Ground 23 TMDSClock+
8 NC 16 Hot Plug Detect 24 TMDSClock-
PinNo. Signal Name PinNo. Signal Name PinNo. Signal Name
1 TMDSData2+ 9 TMDSData017 DDC/CECGround
2 TMDSData2Shield 10 TMDSClock+18 +5VPower
3 TMDSData2 11 TMDSClockShield 19 Hot Plug Detect
4 TMDSData1+ 12 TMDSClock
5 TMDSData1Shield 13 CEC
6 TMDSData114 Reserved (N.C. on
device
7 TMDSData0+ 15 SCL
8 TMDSData0Shield 16 SDA

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3.2FactoryPresetDisplayModes
CompliantTiming

Service ManualASUSVW223
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3.3. PanelSpecification
3.3.1GeneralFeatures
The VW223 modelisa22 inchwide TFT-LCD modulewitha4-CCFLBacklight Unit and a30-pin2ch-LVDS
interface.Thismodulesupports1680Χ1050WSΧGA+(16:10 wide screen)mode and displaysup to16.7millions
colors.The invertermoduleforthe Backlight Unitisnotbuiltin.
3.3.2DisplayCharacteristics

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3.3.3OpticalCharacteristics
TestConditionsand MeasurementProcedures
Note(1)Luminance, Chromaticityand CCT Measurement
Measurement SystemSetup:
The LCD moduleshouldbe stabilized atgiventemperaturefor20minutestoavoidabrupt
temperaturechange during measuring.Inordertostabilizethe luminance,the measurement
shouldbe executed afterlightingBacklightfor20 minutesinawindless room.
Note(2)Definition ofContrast Ratio(CR):
The contrast ratiocanbe calculated bythe following expression and figurebelow.
Contrast Ratio(CR)=L255 / L0
L255: Luminanceofgraylevel255
L0: Luminanceofgraylevel0
CR =CR(1)
CR (X)iscorresponding tothe Contrast Ratioof the point XatFigureinNote(3).
Note(3): Definition ofluminancemeasured pointsand Brightness Uniformity

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The position ofmeasuring area corner:X=10.0mm ;Y=10.0mm
Luminanceofcenterpoint: L=L(1)
Brightness UniformityMeasurement points: Thirteen specified points1-13
Formula:Maximum[L(1), L (2), L(3),L(4), L (5), L (6), L(7),L(8), L (9), L(10),L(11), L
(12),L(13)]/Minimum[L(1), L (2), L(3),L(4),L (5),L(6), L (7), L(8),L(9), L
(10),L(11), L (12), L(13)]
Note(4)Definition ofResponseTime(TR,TF)and Measurement Method:
Note(5)Definition ofViewing Angle( x, y):

Service ManualASUSVW223
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3.3.4ElectricalCharacteristics
TFTLCD Module

Service ManualASUSVW223
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BacklightUnit

22"LCD ColorMonitor
ASUSVW223
17
4. BlockDiagram
[VW223D/S/N/T]

Service ManualASUSVW223
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[VW223B]

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5. SchematicDiagram
TOP
DVI_5V
01_VGA
01_VGA
VGA_SCL
RI+
VSIN
BI+
VGA_SDA
GI+
HSIN
V18S
VGA_5V
GND_POWER
+5V
RX1+ RX0+
DVI_HPD
RX2+
RX0- RX1-
RX2- RXC+ RXC- DVI_SDA DVI_SCL
BI+ RI+ GI+ VSIN HSIN VGA_SCL VGA_SDA
DVI_5V VGA_5V
V18S
02_DVI
02_DVI
RX1+ RXC-
RX2-
RX0+
RX1-
DVI_SDA
RX0-
RXC+
RX2+
DVI_SCL
DVI_HPD
DVI_5V
GND_POWER
+5V
VGA_5V
+5V
+5V
GND_POWER GND_POWER
GND_POWER
B_D[0..19] F_D[0..19]
INV_ON/OFF INV_ADJ PWR_SW AUTO_ADJ SOURCE_SELECT LED_GRN LED_ORG PANEL_ON MENU KEY_DOWN KEY_UP
GND_POWER
SPK_L+
SPK_R+
SPK_L-
SPK_R-
RTD_SDIO3
RESET_MCU
RTD_SCSB
YOUT
RTD_SCLK
MUTE VOL_PWM AMP_SHDN
VCM_PWM
BSTHI OE CKV STV POL FSTHI STB GVON
V18S
V33S
+5V
V18S
V33SVGA_SCL
VGA_SDA
DVI_SCL
DVI_SDA
GND_POWER
GND_POWER
+5V +5V
04_SCALER
04_SCALER
YOUT
RTD_SDIO3
VCM_PWM
OE
CKV
STV POL STB
FSTHI BSTHI
RESET_MCU
V33S
RTD_SCSB
RTD_SCLK
RX1+
B_D[0..19] F_D[0..19]
GVON
VGA_SCL RX2- RXC- RX0+ RI+ RX1- DVI_SDA BI+ VSIN RX0- VGA_SDA
V18S
GI+ DVI_SCL RX2+ RXC+ HSIN
GND_POWER
05_AUDIO
05_AUDIO
AMP_SHDN
VOL_PWM
SPK_L+
SPK_L-
SPK_R+
SPK_R-
MUTE
+5V
GND_POWER
06_INTERFACE
06_INTERFACE
INV_ON/OFF INV_ADJ MENU KEY_DOWN KEY_UP SOURCE_SELECT PWR_SW AUTO_ADJ LED_ORG LED_GRN
V33S
BSTHI FSTHI VCM_PWM OE CKV STV POL STB
SPK_L+
SPK_L-
B_D[0..19]
V18S
F_D[0..19]
+5VSPK_R+
PANEL_ON
SPK_R-
GVON
GND_POWER
03_MCU
03_MCU
RTD_SDIO3
RTD_SCSB
RTD_SCLK
MENU
KEY_DOWN
KEY_UP
SOURCE_SELECT
AUTO_ADJ
PWR_SW
YOUT
LED_GRN LED_ORG
INV_ON/OFF
MUTE
RESET_MCU
VGA_SCL
INV_ADJ
DVI_SDA
AMP_SHDN
VGA_SDA
DVI_SCL
PANEL_ON
VOL_PWM DVI_HPD
DVI_5V
+5V
VGA_5V
GND_POWER

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5.1MainBoard
VGA
GND_POWER
C4
VGA_5V4
D24
1 2
3
+5V3,4,6,7
C75
R128
VGA_5V R129
R130
R126
R127
U1
A0
1
A1
2
A2
3
GND
4SDA 5
SCL 6
WP 7
VCC 8
VGA_SDA
VGA_SCL
VGA_SDA
BI+
GI+
Z5
1 2
VGA_5V
RI+
CN1
1
6
2
7
3
8
4
9
5
11
12
13
14
15 10
Z2
1 2
VSIN
Z3
1 2
HSIN
R6
C5
GND_POWERGND_POWER
GI+
RI+
D1
1
32
BI+
Z6
1 2
D3
1
32
D4
1
32
RI+ 5
BI+ 5
GI+ 5
GND_POWER
VSIN 5
R4
HSIN
GND_POWER
HSIN 5
R5
Z4
1 2
VGA_SCL
Z1
12
GND_POWER
VGA_5V4
V18S 5,7
VGA_SDA4,5
VGA_SCL4,5
VSIN
C3
GND_POWER
GND_POWER
GND_POWER
GND_POWER
GND_POWER
GND_POWER
GND_POWER
GND_POWER
C1
GND_POWER3,4,5,6,7