NEC NMV 1700V Bedienungsanleitung

17-inch LCD Monitor

NMV 1700V (U170ATA)

Service Manual

CircuitDescriptionIndex

NMV1700V

1.Audiocircuit ----------------------------------------------------------------------------------------------------------------------------1

1.1Audioinput-------------------------------------------------------------------------------------------------------------------------1

1.2Audiooutput-----------------------------------------------------------------------------------------------------------------------1

2.Powersupply----------------------------------------------------------------------------------------------------------------------------1

3.Videoinputcircuit---------------------------------------------------------------------------------------------------------------------1

4.Definition converterLSIperipheralcircuit -------------------------------------------------------------------------------------1

5.Systemreset,LEDcontrolcircuit -------------------------------------------------------------------------------------------------1

6.E2PROMforPNP----------------------------------------------------------------------------------------------------------------------1

7.E2PROM----------------------------------------------------------------------------------------------------------------------------------2

8.CPUcircuit ------------------------------------------------------------------------------------------------------------------------------2

8.1Dection ofPOWERswitchstatus--------------------------------------------------------------------------------------------2

8.2Displaymodeidentification----------------------------------------------------------------------------------------------------2

8.3Usercontrol------------------------------------------------------------------------------------------------------------------------4

8.4Controlofidentification converterLSI(IC14)---------------------------------------------------------------------------5

8.5I2Cbuscontrol---------------------------------------------------------------------------------------------------------------------5

8.6PowerON sequence--------------------------------------------------------------------------------------------------------------6

8.7PowerOFF sequence ------------------------------------------------------------------------------------------------------------7

8.8ListofCPUassignments--------------------------------------------------------------------------------------------------------8

TableofContents

Page1CircuitDescription

NMV1700V

1. Audio circuit (Circuit diagramsMain PWB1/1 JACKPWB1/1)

1.1Audioinput

Theaudiosignalinputreceivedfromtheaudioinputterminal(JK011)isappliedtothepre-amplifierI006 of

2(L-CH)and 29 (R-CH)through thelow-pass filterconsisting ofR047,R049,R048,R050,C062 and C063.

Inthispre-amplifier,controlsofVolume,Balance,Bass,and Trebleareconducted.Theaudiosignalcontrolled

atthepre-amplifierisenteredinand amplifiedattheAMPI007of9(L-CH)and1(R-CH).Since then,thesignal

istotheoutputjack.

1.2Audiooutput

Theaudiosignalisoutputfromtheoutputterminal(P012)ofthejacktothespeakersystem.

2. Powersupply (Circuit daigramsMAINPWB8/10, 9/10, 10/10)

1.I322:DC-DCconverter

A5VpowersupplyforLCDmodule,CPU,and logicisgeneratedfromthe19Vsource.

2.I323:3-terminalregulator

A3.3VpowersupplyforScalerICI315,LVDSICI319,I320 isgeneratedfromthe5Vsource.

3.I330:3-terminalregulator

A3.3VpowersupplyforSDRAMICI316,I317,I318 isgeneratedfromthe5Vsource.

4.I324:3-terminalregulator

A2.5VpowersupplyforScalerICI315 isgeneratedfromthe5Vsource.

Q307,I321 ON/OFF controlforLCDModule

ON/OFF controlisperformedforpowerON/OFF and alsoforthepowersaving sequence.

3. Video inputcircuit (Circuit diagramMAINPWB4/10)

TheanalogvideosignalinputenteredfromP304,theAC-coupledvideosignalisusedtoclamptheblacklevelat

0V).

4. Definition converterLSIperipheralcircuit (Circuit diagramMAINPWB)

I315 gm5020 isthedefinition converterLSI.

Theanalog R,G,Bsignalinputenteredfromthevideoinputcircuit isconvertedintothedigitaldataofvideo

signalthrough theincorporatedA/Dconverter.Basedon thisconversion,thisdevice performsinterpolation

during pixelextension.Thesource voltageforthisdevice is3.3V,2.5Vand thesystemclockfrequencyis

24MHz.Thewithstand voltagelevelfortheinputsignalvoltageifI315 is3.3Vand 5V.

5. Systemreset, LEDcontrolcircuit (Circuit diagramMAINPWB3/10)

5.1Systemreset

Systemresetisperformedby detecting therisingand falling ofthe5Vsource voltageatI301.

5.2LEDcontrolcircuit

Green/amberislit withthecontrolsignaloftheLEDGREENand LEDAMBERsignalpin15,12 fromI306

(Circuit diagramMAINPWB2/8).

6. E2PROMforPnP(Circuit diagramMAINPWB4/10)

Page2Circ uitDescription

NMV1700V

7. E2PROM(Circuit diagramMAINPWB3/10)

DatatransferbetweenI305 (AT24 C16)and CPU(Circuit diagramMAINPWB2/8(I302)iseffectedthrough

theIICbusSCL(pin15)and SDA (pin16)ofI302.Thedatatobetransferredtoeachdevice arestoredinI305.

l I315controldata.

l OSDrelatedsetting data.

l Othercontroldataforservice menu.

8. CPUcircuit (Circuit diagramMAINPWB3/10)

I302 (87C51RD2)functionsastheCPU.

Thesource voltageforthedevice is5.0Vand thesystemclockfrequencyis24MHz.

8.1Detection ofPOWERswitchstatus

TheCPUidentifiestheONstatusofthetwopowersupplies.Theidentification ismadewhenthepowersupply

isturnedoff.Forexample,ifthepowersupplyisturnedoff withthePOWERswitch,thePOWERswitchmustbe

turnedon whenactivating thepowersupplyagain.If thepowersupplyisturnedoff by pulling outthepower

cord,thenthispowersupplycanbeturnedon by connecting thepowercord,withoutpressing thePOWER

switch.

8.2Displaymodeidentification

8.2.1Functions

(1)Displaymodeidentification

l Thedisplaymodeofinputsignalisidentifiedbasedon Table1.

l Whenthemodehasbeenidentifiedthrough themeasurementofhorizontaland verticalfrequencies,thetotal

numberoflinesisdeterminedwithaformulaof“Horizontalfrequency/Verticalfrequency=Totalnumber

oflines.“Finalidentification canbemadeby examining thecoincidence oftheobtainedfigurewiththe

numberoflinesforthemodeidentifiedfromthefrequency.Theboundarynumberoflinesineachmodeis

showninTable2.

l Whenthedetectedfrequencyifthesyncsignalhaschanged,thetotalnumberoflinesshouldbecountedeven

through it isrgeidentifiedfrequencyinthesamemode.

(2)Powersavemode.

Thispowersavemodeisassumedwhenthefrequencyofthehorizontal/verticalsignalisasspecifiedbelow.

l Verticalfrequency:50 ~86 Hz

l Horizontalfrequency:24 ~92 KHz

lVTOTAL:1200 ormore.

(3)Powersavemode.

Thepowersavemodeisassumedwhenthehorizontal/verticalsignalsareasspecifiedbelow.

l If thereisno horizontalsyncsignalinput.

l If thereisno verticalsyncsignalinput.

l If thehorizontalsyncsignalisoutsidethemeasuringrangeofgm5020.

Page3CircuitDescription

NMV1700V

l If theverticalsyncsignalisoutsidethemeasuringrangeofgm5020.

Polarity

Mode

Resolution

H-freq

(KHz)

Band Width

(MHz) H V

1. VGA 720 x 400 70Hz

31.47

28.322 -+

2. VGA 640 x 480 60Hz

31.47

25.175 - -

3. MAC 640 x 480 66Hz 35 32.24 - -

4. VESA 640 X 480 72Hz

37.86

31.5 - -

5. VESA 640 X 480 75Hz 37.5 31.5 - -

6. VESA 800 x 600 56Hz

35.16

36 + +

7. VESA 800 x 600 60Hz

37.88

40 + +

8. VESA 800 x 600 75Hz

46.88

49.5 + +

9. VESA 800 x 600 72Hz

48.08

50 + +

10. MAC 832 x 624 75Hz

49.72

57.283 - -

11. VESA 1024 x 768 60Hz

48.36

65 - -

12. VESA 1024 x 768 70Hz

56.48

75 - -

13. VESA 1024 x 768 75Hz

60.02

78.75 + +

14. VESA 1280 x 1024 60Hz 64 108 + +

15. VESA 1280 x 1024 75Hz 80 135 + +

16. VESA 1152 x 864 75Hz 67.5 108 + +

17. VESA 1280 x 960 60Hz 60 108 + +

Page4 CircuitDescription

NMV1700V

Table1

Table2thenumberofthelines,Vsyncdistinction

9.3UserControl

Indication resolution The number of the

distinction lines Distinction Vsync The fixed mode

640 x 480 487 < LINE <607 fV <63 Hz 2

63 Hz < fV <68 Hz 3

68 Hz < fV <74 Hz 4

74 Hz < fV <78 Hz 5

800 x 600 607 < LINE <777 fV <58 Hz 6

58 Hz < fV <63 Hz 7

63 Hz < fV <73 Hz 9

73 Hz < fV <78 Hz 8

832 x 624 640 <LINE -10

1024 x 768 768 < LINE <870 fV <63 Hz 11

68 Hz < fV <73 Hz 12

73 Hz < fV <78 Hz 13

1152 x 864 870 < LINE <1031 16

1280 x 960 960 < LINE <1027 17

1280 x 1024 1027 < LINE 14,15

9.3.2Functions

Controliseffectedforthepush-switchestobeusedwhentheuserchangestheparameters,inordertomodifythe

respectivesetting values.Whethertheswitchhasbeenpressedisidentifiedwiththeswitchinputlevelthatis

turned“L”.

Eachswitchinputportispulledup atoutsideofASIC

EachparameterisstoredintheEEPROM,thecontentsofwhichareupdatedasrequired.

Port Pin No.

I/O

Signal name

Function Remarks

GPI04

I315, M1

1MENU

EXIT/ENTER switch input

ENTER/Withdraw

from OSD

GPI05

I315, L1

1DOWN switch input ( ) key

GPI06

I315, G18

1-switch input ( ) key

GPI07

I315, G19

1+switch input ( ) key

GPI0

I302, 15

1 POWER soft power switch input ( power ) key

Page5CircuitDescription

NMV1700V

9.3.1RelatedportsofI315 and pinofI302

8.4.2Fun ction s

Majorfunction ofI315 areasfollows:

(1)Ex pansion ofthedisplayscreen.

(2)Timing controlforvarioussignaltypes.

Port Pin No. I/O Signal name Function

P3.5 17 IIICCLK IIC bus clock

P3.4 16 I/O IICDATA IIC bus data

(3)Power -supplysequence (LCDpanel).

8.5I2Cbuscontrol

8.5.1RelatedportsofI302

8.5.2I2C-control ledfun ctio ns

8.4Controlofdefinitio n converterLSII315

Pin No.

I/O

Signal name

Function

R3 IIRQ gmZan1 interrupt signal

P1 OHCLK gmZan1 serial clock

P3, P4,

R1, R2

I/O HDATA gmZan1 serial data

P2 OHFS gmZan1 serial select

8.4.1Portsrelatedtocontrol

Page6 CircuitDescription

NMV1700V

Thefollowing functionalcontrolsareeffectedby I2C.

(1)ControlofEEPROMI305fforparametersetting.

(2)Controlofaudiopreamplifier.

POWER

LED

LVCC

(Audio_EN)

Panel_VCC

PCLK/DATA

Backlight_EN

Page7CircuitDescription

NMV1700V

8.6PowerON sequence

WhenthePOWERswitchispressed,thePOWEROFFsignalisturned“H”.Whenthis“H”potentialisdetected,

theCPUbeginstoestablishtherespectivepowersuppliesaccording tothesequence shownbelow.

8.7PowerOFF sequence

WhenthePOWERswitchispressedwhilethepowersupplyisON,thePOWERONsignalisturned“H”.When

this“H”potentialisdetected,theCPUbeginstoturnoff therespectivepowersuppliesaccordingtothesequence

shownbelow.

POWER

LED

LVCC

(Audio_EN)

Panel_VCC

PCLK/DATA

Backlight_EN

Page 8 Circuit Description

NMV 1700V

Port Pin No. Signal Name Initial Setting Function Remark

~ NC ~ ~

P1.0 HDATA0 ~ gm50 0 4bit interface data

P1.1 !HDATA1 ~ gm50 0 4bit interface data

P1. "HDATA ~ gm50 0 4bit interface data

P1.3 #HDATA3 ~ gm50 0 4bit interface data

P1.4 $HCLK ~ gm50 0 4bit interface Clock

P1.5 %HFS ~ gm50 0 data enable

P1.6 &Bank ~ ~

P1.9 'PWM ~ Pulse width modulation

~ RST L Reset CPU Active H

P3.0  RXD H Receive data

~ NC ~ ~

P3.1 ! TXD H Transmit data

P3. " IRQ ~ gm50 0 interrupt signal

P3.3 # PWR_SW ~ ON/OFF monitor power

P3.4 $ SDA H IIC Bus Data

P3.5 % SCL ~ IIC Bus Data Active L

P3.6 & P3.6 H External Memor

Write Enable

P3.7 ' DDC_GND L Detect Dsub cable plug-in

~  XTAL ~ Crystal signal out

~  XTAL ~ Crystal signal in

~ GND ~ ~

~ ! NC ~ ~

P .0 " A8 ~ High-order address byte

P .1 # A9 ~ High-order address byte

P . $ A10 ~ High-order address byte

P .3 % A11 ~ High-order address byte

P .4 & A1 ~ High-order address byte

P .5 ' A13 ~ High-order address byte

P .6 ! A14 ~ High-order address byte

P .7 ! A15 ~ High-order address byte

~! PSEN# H Program store enable

~!! ALE ~ Address latch enable

~!" NC ~ ~

~!# EA# H External Access Enable

P0.7 !$ D7(USB_ON) H USB HUB

ower Enable

(

tion

)

P0.6 !% D6(MUTE) H Audio MUTE Enable

P0.5 !& D5(LVCC) L Audio suspend Enable

P0.4 !' D4(LEDGRN) H LED Green ON

P0.3 " D3

(

LEDAMBER

)

L LED AMBER ON

P0. " D (BKLT_EN) ~ Inverter Back light Enable

P0.1 " D1

(

LVDS ON

)

H LVDS IC Enable

P0.0 "! D0

(

PANEL EN

)

H Panel power Enable

~"" VCC ~ VCC

8.8 List of CPU Pin Assignments

Inhaltsverzeichnis

Andere NEC Monitor Handbücher

NEC

NEC MultiSync X462UN Leitfaden

NEC

NEC MultiSync E242N Bedienungsanleitung

NEC

NEC LCD1980SXI - MultiSync - 19" LCD Monitor Bedienungsanleitung

NEC

NEC NRP-47CR Bedienungsanleitung

NEC

NEC MultiSync P221W Bedienungsanleitung

NEC

NEC MultiSync P701 Bedienungsanleitung

NEC

NEC NEC MultiSync LCD1525V LCD1525V LCD1525V Kurzanleitung

NEC

NEC MultiSync 20WGX2 Series Bedienungsanleitung

NEC

NEC PlasmaSync 42VR5 Bedienungsanleitung

NEC

NEC MD205MG-1 - MultiSync - 20.1" LCD Monitor Bedienungsanleitung

NEC

NEC MultiSync M751 Bedienungsanleitung

NEC

NEC V461-2 Bedienungsanleitung

NEC

NEC AccuSync AS203WMi Bedienungsanleitung

NEC

NEC MultiSync X463UN Bedienungsanleitung

NEC

NEC LCD1980SX - MultiSync - 19" LCD Monitor Benutzerhandbuch

NEC

NEC MultiSync V984Q Bedienungsanleitung

NEC

NEC MultiSync LCD1970GX LCD1970GX LCD1970GX Bedienungsanleitung

NEC

NEC MultiSync LCD1980FXi Bedienungsanleitung

NEC

NEC LCD1760VM - MultiSync - 17" LCD Monitor Bedienungsanleitung

NEC

NEC MultiSync P212 Bedienungsanleitung

NEC

NEC FA Series Bedienungsanleitung

NEC

NEC LCD195VX-BK - MultiSync - 19" LCD Monitor Bedienungsanleitung

NEC

NEC MultiSync FE791SB Bedienungsanleitung

NEC

NEC Multi Sync EA221WM Bedienungsanleitung

Beliebte Monitor Handbücher anderer Marken

Linear Acoustic

Linear Acoustic LQ-1000 Bedienungsanleitung

AOC

AOC I2579V Bedienungsanleitung

Gateway

Gateway FPD1520 Bedienungsanleitung

Furuno

Furuno Mu 120c Bedienungsanleitung

Asus

Asus VB171D - 17" LCD Monitor Bedienungsanleitung

Dell

Dell S2230MX Gebrauchsanweisung

Philips

Philips 107C64 Bedienungsanleitung

Dell

Dell S2409WFP Bedienungsanleitung

EverFocus

EverFocus EN-7517E Bedienungsanleitung

Panasonic

Panasonic TH152UX1 - 152" PLASMA TV Bedienungsanleitung

Dell

Dell Precision 7680 Bedienungsanleitung

LG 50PM1M - - 50" Plasma Panel Bedienungsanleitung

Bosch

Bosch DDU 9 Bedienungsanleitung

Acer

Acer A231HL Bedienungsanleitung

Philips

Philips 86BDL4152T Bedienungsanleitung

Emay

Emay SleepO2 Bedienungsanleitung

IBM

IBM 6360 Montageanleitung

LG M1950D-PZ Bedienungsanleitung