ViewSonic VX1940W-2 Manuel utilisateur

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Service

TABLE OFCONTENTS

Description P

ageDescription

Page

SAFETYNOTICE

ANYPERSONATTEMPTINGTOSERVICETHISCHASSISMUSTFAMILIARIZEHIMSELFWITH

THECHASSISAND BEAWAREOFTHENECESSARYSAFETYPRECAUTIONSTOBE USED

WHENSERVICINGELECTRONICEQUIPMENTCONTAININGHIGHVOLTAGES.

CAUTION:USEASEPARATEISOLATIONTRANSFOMERFORTHISUNITWHENSERVICING

roubleshootingflowchart

…………………...

8..MechanicalInstructions.………………….......35

9. Exploded diagram……………........................41

10.BOMList….………………………………….43

11.Differentpartslist……………………………….57

TableOfContents.......……..............................…........1

Revision List.…........................................……......2

Precautionsand SafetyNotices…………............……......3

1.MonitorSpecification.............................……….....4

2.LCD MonitorDescription……….......13

3. Frontpanelfunctioncontroldescription....................13

3.1 Front PanelHardwareControls………………..........13

3.2Functiondescriptions.....................…...........14

4. Input/OutputSpecification…………………..………..16

5.SchematicDiagram.……………………..................19

5.1Mainboard.……………………..................19

5.2Powerboard.……………………..................24

5.3OSDKeyPAD.……………………..................27

6.PCBlayoutdiagrams.……………………..................27

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Revision List

Version ReleaseDate RevisionHistory TPV Model

T96MNBDKIWVSNNN

A00 NOV-5-2008 InitialRelease T96MNBDKIWVSNND

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Precautionsandsafetynotices

safety precautions

Thismonitorismanufacturedand testedonagroundprinciplethatauser’ssafetycomesfirst. However,

improperuseorinstallation maycausedamagetothe monitoraswellasthe user.Carefullygo overthefollowing

WARNINGSbeforeinstallingandkeepthisguidehandy.

WARNINGS

Thismonitorshouldbe operatedonlyat thecorrectpowersourcesindicatedonthelabelon the rearendofthe

monitor. If you’reunsureofthepowersupplyinyourresidence, consult youlocaldealerorpowercompany.

Useonlythespecialpoweradapterthat comeswiththismonitorforpowerinput.

Donottrytorepairthemonitoryourselfasitcontainsnouser-serviceableparts.Thismonitorshouldonlybe

repairedbyaqualifiedtechnician.

Donotremovethemonitorcabinet. Thereishigh-voltagepartsinsidethat maycauseelectricshocktohuman

bodies, even when the powercordisunplugged.

Stopusingthe monitorifthecabinet isdamaged.Haveitchecked byaservicetechnician.

Put yourmonitoronlyinaclean,dryenvironment. If itgetswet,unplugthepowercableimmediatelyandconsult

yourservicetechnician.

Alwaysunplug the monitorbeforecleaningit.Cleanthe cabinetwithaclean,drycloth.Applynon-ammonia

based cleanerontothecloth, notdirectlyontothe glassscreen.

Keepthemonitorawayfrommagneticobjects,motors,TVsets, and transformer.

Donot placeheavyobjectson themonitororpowercord.

Productsafety notice

Manyelectricaland mechanicalpartsinthischassishavespecialsafetyvisualinspectionsand the protection

affordedbythemcannotnecessarilybeobtained byusing replacementcomponentsratedforhighervoltages,

wattage,etc.Beforereplacinganyofthesecomponentsread thepartslistinthismanualcarefully.The useof

substitutereplacementpartswhichdonot havethesamesafetycharacteristics asspecified inthe partslistmay

createshock, fire,orotherhazards.

Servicenotes

Whenreplacingpartsorcircuitboards,clamptheleadwiresaround terminalsbeforesoldering.

Whenreplacingahighwattageresistor(morethan 1Wofmetaloxide filmresistor) incircuitboard,keepthe

resistorabout5mmawayfromcircuitboard.

Keepwiresawayfromhigh voltage, hightemperaturecomponentsandsharpedges.

Keepwiresintheiroriginalposition soastoreduceinterference.

Usage ofthisproduct pleaserefertoalsouser’smanual.

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1.MonitorSpecifications

1.1specifications VSA VSAP VSE VSCN

Region (M) P(E)/(U) (G)

ProductName VX1940w-2

ModelNumber VS11868

OSDLanguages English,French,German,Italian,Spanish,Finnish,

Russian,Korean, Japanese,TraditionalChinese,

SimplifiedChinese

TFT LCD PanelandModel# CMOA190Z1L01

Scalar Model#: NT68670HTFG

InputSignal D-Sub /DVI-D

SyncCompatibility Separate/ Composite/ SOG

PowerConsumption Built-in/under49W(max)/ 44W(typ)

PowerCable RefertoAppendixG

Analog Cable(1.8m,color:black),withPC

2001and HotPlug Detect &DDC YES

DVI-DCable/ 1.8m YES

ViewSonicCD Wizard

ViewSonic Quick StartGuide

Arabic,English,Finnish, Spanish,German,

Italian, Japanese,Swedish,Polish,Korean

Portuguese,Russian,French,Greek,Dutch,Turkish,

SimplifiedChinese,TraditionalChinese,Czech, Hungarian

ScreenProtectorMylar YES

ExtrmeLabel (up to 2ms) Yes

ServiceInsert(newversion) YES NO NO NO

WarrantySticker NO NO NO YES

WarrantyCard(newversion) NO NO NO YES

CartonSticker(newversion) NO NO NO YES

PEbag ofCarton NO NO NO YES

1.2General specification

TestResolution&Frequency 1680x1050@60Hz

TestImageSize FullSize

Contrast andBrightnessControls FactoryDefault:

Contrast=70%, Brightness=100%

1.3Videointerface

Analog Input Connector DB-15(Analog),refertheappendixA

DigitalInputConnector DVI-D

Default Input Connector Defaultstothefirst detectedinput

VideoCableStrainRelief Equaltotwicetheweightofthemonitorforfiveminutes

VideoCableConnectorDB-15Pin

out CompliantDDC/CI/ DDC2B

VideoSignals 1. VideoRGB(Analog)

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Separate, Composite,and SynconGreen

2.TMDS(Digital)

VideoImpedance 75Ohms(Analog), 100Ohms(Digital)

MaximumPCVideo Signal 950 mVwithnodamage tomonitor

MaximumMacVideoSignal 1250mVwithno damagetomonitor

SyncSignals TTL

DDC2B CompliantwithRevision 1.3

DDC/CI CompliantwithRevision 1.1

HDCP HDCPcodeinside andcompatible

SyncCompatibility SeparateSync, CompositeSync,SOG

VideoCompatibility Shall becompatiblewithallPCtypecomputers,Macintosh

computers, andaftermarketvideo cards

640x350 640x400 640x480 720x400

720x480 800x600 832x624 1024x768

1152x864 1152x870 1280x720 1280x768

1280x960 1280x1024 1360x768 1400x1050

1440x900 1600x1200 1680x1050

ResolutionCompatibility

The image verticalsizemightnot befull screen.

But the imageverticalposition shouldbe atthecenter.

Exclusions Notcompatiblewithinterlacedvideo

1.4TFT LCD panel

PanelSourceIdentify

Thepanelcode(refertosegment4-16)shouldbeshownonfollowingposition,

(1)Thelowerright side of IDlabel. (see Figure2)

(2)Thelowerrightside ofUPClabel.(see Figure3)

(3)TheF/Wversion stickerorsilkscreenon mainboard.

PanelCharacteristics :

st SourcePanel

Modelnumber CMOA190Z1L01

Type TNTYPEWITHLVDSINTERFACE

ActiveSize19 WIDE;408.24(H) X255.15(V)

PixelArrangement RGBVERTICALSTRIPE

PixelPitch 0.243(H) X0.243(H)MM

GlassTreatment ANTIGLARE(HARDCOATING3H)

#ofBacklights 4CCFL

BacklightLife 40000 HOURS (MIN)

Luminance(5-point)

Condition:

CT= User Color,

Contrast=Max,

Brightness= Max

300CD/M2(TYPAFTER30MINUTEWARM

UP)

230CD/M2(MINAFTER30 MINUTEWARM

UP)

BrightnessUniformity 67%(MIN)

ContrastRatio 1000:1(TYP), 630:1(MIN)

ColorDepth 16.2MILLIONCOLORS

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ViewingAngle(Horizontal)

Ultra TN type

@CR>10

Typical:170

Minimum:150

ViewingAngle(Vertical)

Ultra TN type

@CR>10

Typical:160

MINIMUM:140

ResponseTime

10%-90%@Ta=25°C

Typical=5ms(on/off)

Maximum=15ms(on/off)

PanelDefects PleaseseePanelQualitySpecifications.

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1.5Imageperformance

DisplaySize

HorizontalDisplaySize, PrimaryPreset Full Screen

VerticalDisplaySize,PrimaryPreset Full Screen

Luminance

Item Condition JUDGMENT

Lv(Max)Contrast=100%

Brightness=100%

CCT =User color(R/G/B=100%)

LV(MAX)=THE LUMINANCEIN

SECTION

4-7 “TFTLCDPANEL

Lv(Def)Contrast=100%

Brightness=100%

CCT =6500K [LV(DEF) /LV(MAX) ] X100% 65%

Lv(6500k) Contrast=Default

Brightness=Default

ColorTemperature=6500K [LV(6500K)/LV(MAX) ] X100% 85%

Lv(9300k) Contrast=Default

Brightness=Default

ColorTemperature=9300K [LV(9300K)/LV(MAX) ] X100% 65%

Lv(7500k) Contrast=Default

Brightness=Default

ColorTemperature=7500K [LV(7500K)/LV(MAX) ] X100% 75%

Lv(5400k)Contrast=Default

Brightness=Default

ColorTemperature=5400K[LV(5400K)/LV(MAX) ] X100% 70%

Lv(Brightness)

Contrast=100% [LV(BRIGHTNESS=0%)/ LV(BRIGHTNESS=100%)]X

100% ≤55%

Lv(Contrast) Brightness=100% [Lv(Contrast=0%)/Lv(Contrast=100%)]x

100% ≤30%

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ContrastRatio

Contrast=Default

Brightness=Default

TestPattern= 64-Gray NO VISIBLE SATURATION

Contrast=100%

Brightness=100%

TestPattern=64-Gray 12-16 LEVELSATURATION

DynamicContrastRatio

CR(Max) Condition:

CCT=USERCOLOR

(R/G/B=100%)

3000:1(typ)

DCRSelection inOSDMenu Display “Dynamic Contrast”textwith “On/Off”

selection.

DCRDefaultSetting Off

DCROnDefinition Full timeframeluminancedetectionfor:

1.BacklightAdjustment

2.AdaptiveContrastAdjustment

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BacklightAdjustment Method

DCR willcalculatethegraylevelhistogramin aframe

andsetbacklightbrightnesstargetasbelow:

Theadjustment timetomeetbrightnesstargetis

3±0.5seconds.

Imageflickerorflashingis prohibitedforvideo

displayand/orPCmode operation.

GrayLevel

(FrameAverage)

Backlight

Brightness

(%)

0~7 0

8~15 30

16~23 52

24~31 68

32~39 78

40~47 86

48~55 91

56~63 96

64and above 100

BacklightBrightness

GrayLevel

30%

52%

68%

78%

86%

91%

96%

100%

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AdaptiveContrastAdjustment

Toadjust Gammadatafordifferentframeluminance

Thecontrast/datadeltapercentageisless than

10%of originalvalue.

Lowlevelnoisecannotoccurduringadaptive

contrast adjustment.

Thedynamic changeinGammadatacan not

causeflashingduringgrayleveltransition (L0 to

L255)

ContrastCurveReference

DarkSceneBrightScene

(Actualcurvemayvarydependsonperformance)

ColorandSharpness tuning (Optional)

Toimproveimagecontrast,the saturationand

peakingcanbeincreased upto5%.

Beawareofside effectslikecolordistortionand

64 192

255

128

192

255

128

Yin

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