联想液晶显示器LXBL17C维修手册.docx

联想液晶显示器LXBL17C维修手册.docx

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联想液晶显示器LXBL17C维修手册

LXB-L17C

THESEDOCUMENTSAREFORREPAIRSERVICEINFORMATIONONLY.EVERYREASONABLEEFFORTHASBEENMADETOENSURETHEACCURACYOFTHISMANUAL;WECANNOTGUARANTEETHEACCURACYOFTHISINFORMATIONAFTERTHEDATEOFPUBLICATIONANDDISCLAIMSRELIABILITYFORCHANGES,ERRORSOROMISSIONS.

TableofContent

RevisionList………………………………………………………………………………………………………….

2

1.MonitorSpecifications…………………………………………………………………………………………..

3

2.LCDMonitorDescription………………………………………………………………………………………..

4

3.OperatingInstructions…………………………………………………………………………………………..

5

3.1GeneralInstructions…………………………………………………………………………………………...

5

3.2ControlButtons………………………………………………………………………………………………...

5

3.3AdjustingthePicture…………………………………………………………………………………………..

6

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

10

4.1InputSignalConnector………………………………………………………………………………………..

10

4.2FactoryPresetDisplayModes………………………………………………………………………………..

11

4.3PanelSpecification………………………………………………………………………………………….…

12

4.3.1PanelFeature………………………………………………………………………………….………….

13

4.3.2DisplayCharacteristics…………………………………………………………………………………..

13

4.3.3OpticalCharacteristics……………………………………………………………………………………

13

4.3.4ParameterguidelineforCCFLInverter………………………………………………………………...

13

5.BlockDiagram………………………………………………………………………………………………….…

15

5.1MonitorExplodedView………………………………………………………………………………………..

15

5.2SoftwareFlowChart…………………………………………………………………………………………...

16

5.3ElectricalBlockDiagram………………………………………………………………………………………

18

5.3.1MainBoard………………………………………………………………………………………………..

18

5.3.2Inverter/PowerBoard………………………………………………………….………………………….

19

6.Schematic……………………………………………………………………………………………………….…

20

6.1MainBoard……………………………………………………………………………………………………..

20

6.2PowerBoard……………………………………………………………………………………….…………

26

7.PCBLayout……………………………………………………………………………………………………….

28

7.1MainBoard……………………………………………………………………………………………………..

28

7.2PowerBoard…………………………………………………………….……………………………………

29

7.3KeyBoard………………………………………………………………………………………………………

29

8.Maintainability…………………………………………………………………………………………………….

30

8.1EquipmentsandToolsRequirement…………………………………………………………………………

30

8.2TroubleShooting…………………………………………………………………………………………….…

31

8.2.1MainBoard………………………………………………………………………………………………...

31

8.2.2Power/Inverter/Board…………………………………………………………………………………….

34

8.2.3KeypadBoard……………………………………………………………………………………………..

35

9.White-Balance,Luminanceadjustment……………………………………………………………….……..

37

10.EDIDContent…………………………………………………………………………………………………….

38

11.BOMLIST………………………………………………………………………………………………………...

39

RevisionList

Revision

Date

ChangeDescription

A00

Sep-07-05

OriginalRevision

B00

Oct-13-05

Updatebom,schematicdiagram,panel

1.MONITORSPECIFICATIONS

LCDPanel

Drivingsystem

TFTColorLCD

Size

43.2cm（17.0"）

Pixelpitch

0.264mm（H）x0.264mm（V）

Viewableangle

150˚（H）130˚（V）

Responsetime（type）

12msforCMOpanel

Input

Sync.Type

H/VTTL

H-Frequency

30kHz–80kHz

V-Frequency

50-75Hz

PowerConsumption

ONMode

<42W

OFFMode

<2W

ContrastRatio

500:

1

DotClock

135MHz

WhiteLuminance

300cd/m2

Max.Resolution

1280x1024

Plug&Play

VESADDC2BTM

DisplayColor

16.2M

PowerSource

100~240VAC,47~63Hz

MaximumScreenSize

Horizontal:

337.92mm

Vertical:

270.336mm

Environmental

Considerations

OperatingTemp:

0°Cto45°C

StorageTemp:

-20°Cto60°C

OperatingHumidity:

10%to85%

2.LCDMONITORDESCRIPTION

TheLCDMONITORwillcontainamainboard,aninverter/PWPCboardandakeypadboardwhichhousetheflatpanelcontrollogic,brightnesscontrollogicandDDC.

ThepowerboardwillprovidetheACtoDCvoltagetodrivebacklightandthemainboardchipseachvoltage.

PWPCboard

（IncludeInverterandAdapter）

FlatPanelandCCFLbacklight

MainBoard

Videosignal,DDC

HOSTComputer

Keyboard

MonitorBlockDiagram

CCFLDrive.

RS232Connector

Forwhitebalanceadjustmentinfactorymode

AC-IN

100V-240V

3.OPERATINGINSTRUCTIONS

3.1GENERALINSTRUCTIONS

Pressthepowerbuttontoturnthemonitoronoroff.Theothercontrolbuttonsarelocatedatthefrontofthemonitor.Bychangingthesesettings,thepicturecanbeadjustedtoyourpersonalpreferences.

-Thepowercordshouldbeconnected.

-Connectthevideocablefromthemonitortothevideocard.

-Pressthepowerbuttontoturnonthemonitor,thepowerindicatorwilllightup.

3.2CONTROLBUTTON

Powerbutton：

PowerIndicatorwillturnoffwhenthemonitorisinPowerSavingstatus,andreturnnormalwhilethebuttonispressedonceagain.

LeftandRightButton:

thefunctionbuttonofmonitor，usedtoadjustfunctionandvalue.

AutoAdjustbutton/Exit:

a.WhenOSDMenuisinactivatestatus,thisbuttonwillactasEXIT-KEY（ExitOSDmenu）

b.WhenOSDMenuisinOFFstatus,pressthisbuttontoactivatetheAutoAdjustmentfunction.

TheAutoAdjustmentfunctionisusedtooptimizedtheHPos,VPos,ClockandFocus.

PowerIndicatorcondition:

Green—PowerOnmode

Orange—PowerSavingmode

Black—PowerOffmode

A.PowerButton/PowerIndicator:

PressthebuttontoswitchON/OFFofmonitor’spower,

Green–PowerOnmode

Orange–Powersavingmode

B.Decreasethevalueofselecteditem/ActivatetheBrightnessAdjustment.

C.Increasethevalueofselecteditem/ActivatetheContrastAdjustment.

D.WhentheOSDmenuisinOFFstatus,pressthebuttonforonesecondtoactivatetheAutoAdjustmentfunction

ExitOSDmenuwheninvolumeOSDstatus.

E.ActiveOSDmenuorfunctionadjustconfirm.

3.3ADJUSTINGTHEPICTURE

MainMenu

SubMenu

Description

Brightnessadjustment

Contrastadjustment

Savetheadjustedvalueandreturnbacktothepreviousmenu

Canceltheadjustedvalueandreturnbacktothepreviousmenu

Adjustthehorizontalpositionofthepicture

Adjusttheverticalpositionofthepicture

Savetheadjustedvalueandreturnbacktothepreviousmenu

Canceltheadjustedvalueandreturnbacktothepreviousmenu

AdjustPicturePhasetoreduceHorizontal-Linenoise

AdjustPictureClocktoreduceVertical-Linenoise

Savetheadjustedvalueandreturnbacktothepreviousmenu

Canceltheadjustedvalueandreturnbacktothepreviousmenu

SetOSDdisplaylanguagetoChinese

SetOSDdisplaylanguagetoEnglish

OSDMENUwilldisappearafter5secondsuntouched

OSDMENUwilldisappearafter10secondsuntouched

OSDMENUwilldisappearafter30secondsuntouched

OSDMENUwilldisappearafter60secondsuntouched

Recall7800ColortemperaturefromEEPROM

Recall6500ColortemperaturefromEEPROM

Enteringtheusermode,adjustRedgain,GreengainandBluegain

AdjustthehorizontalpositionoftheOSD

AdjusttheverticalpositionoftheOSD

Savetheadjustedvalueandreturnbacktothepreviousmenu

Canceltheadjustedvalueandreturnbacktothepreviousmenu

N/A

EXITOSD

Toreturnthesettingvaluetodefaultvalue

4.INPUT/OUTPUTSPECFICATION

4.1InputSignalconnector

PINNO.

DESCRIPTION

PINNO.

DESCRIPTION

1.

Red

9.

+5V

2.

Green

10.

LogicGND

3.

Blue

11.

GND

4.

Ground

12.

DDC-SerialData

5.

Ground

13.

H-Sync

6.

R-Ground

14.

V-Sync

7.

G-Ground

15.

DDC-SerialClock

8.

B-Ground

VGAConnectorlayout

4.2FACTORYPRESETDISPLAYMODES：

TIMING

FH（KHZ）

FV（HZ）

SYNC

POLARITY

TOTAL

（DOT/LINE）

ACTIVE

（DOT/LINE）

SYNC

WIDTH

（DOT/LINE）

FRONT

PORCH

（DOT/LINE）

BACK

PORCH

（DOT/LINE）

PIXEL

FOREQ

.（MHZ）

NTSC

31.469

800

640

96

16

48

25.175

59.940

525

480

2

10

33

PAL

31.25

+

884

700

72

5

107

27.625

50Hz

+

625

570

2

12

41

640x480

VGA-480

31.469

800

640

96

16

48

25.175

59.94

525

480

2

10

33

640x480

VESA-480-72Hz

37.861

832

640

40

24

128

31.5

72.809

520

480

3

9

28

640x480

VESA-480-75Hz

37.5

840

640

64

16

120

31.5

75

500

480

3

1

16

720x400

VGA-400-TEXT

31.469

900

720

108

18

54

28.322

70.087

449

400

2

12

35

800x600

VESA-600-60Hz

37.879

1056

800

128

40

88

40

60.317

628

600

4

1

23

800x600

VESA-600-72Hz

48.077

1040

800

120

56

64

50

72.188

666

600

6

37

23

800x600

VESA-600-75Hz

46.875

1056

800

80

16

160

49.5

75

625

600

3

1

21

1024x768

XGA

48.363

1344

1024

136

24

160

65

60.004

806

768

6

3

29

1024x768

VESA-768-70Hz

56.476

1328

1024

136

24

144

75

70.069

806

768

6

3

29

1024x768

VESA-768-75Hz

60.023

1312

1024

96

16

176

78.75

75.029

800

768

3

1

28

1280x1024

XGA

63.981

+

1688

1280

112

48

248

108

60.020

+

1066

1024

3

1

38

1280x1024

VESA-1024-70Hz

74.882

+

1696

1280

160

32

224

127

69.853

+

1072

1024

4

2

42

1280x1024

VESA-1024-75Hz

79.976

1688

1280

144

16

248

135

75.025

1066

1024

3

1

38

4.3PANELSPECIFICATION

4.3.1PANELFEATURE

-Wideviewingangle

-Highcontrastratio

-Fastresponsetime

-Highcolorsaturation（EBULikeSpecifications）

-SXGA（1280x1024pixels）resolution

-DE（DataEnable）onlymode

-LVDS（LowVoltageDifferentialSignaling）interface

-RoHSCompliance

4.3.2DISPLAYSCHARACTERISTICS

4.3.3OPTICALCHARACTERISTICS

OpticalCharacteristics

Therelativemeasurementmethodsofopticalcharacteristicsareshownin4.4.3

4.3.4ParameterguidelineforCCFLInvert