HP MX703 - Pavilion - 17" CRT Display User manual

17-inchColorMonitor
HPmx703 /m703
Service Manual

Service ManualVersionsandRevision
Copyright
Copyright2002LiteOnTechnologyCorp.
AllRightsReserved
Thismanualmaynot,inwholeorinpart,be
copied,photocopied,reproduced,translated,or
convertedtoanyelectronicormachinereadable
formwithoutpriorwrittenpermissionofLiteOn
TechnologyCorp.
m703/mx703ServiceManual.
Printedin Taiwan.
Trademarks
LiteOnisaregisteredtrademarkofLiteOn
TechnologyCorp.
Allothertrademarksarethepropertyoftheir
respectiveowners.
No. Version Release Date Revision
1. 1.0 Aug. 26, 2002 Original release
2. 2.0 DEC. 31, 2002 Original release

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HPmx703/m703
TableofContents
1.Precautions.................................................................................................................2
2.ProductSpecifications..............................................................................................5
3.OperationTheory.....................................................................................................10
4.AlignmentsandAdjustments...................................................................................14
5.Troubleshooting........................................................................................................18
6.RecommendedSparePartsList..............................................................................24
7.BlockDiagram..........................................................................................................26

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HPmx703/m703
1Precautions
Followthesesafetyand servicing precautionstopreventdamageandtoprotectagainstpotentialhazards
suchaselectricalshockandX-rays.
1-1SafetyPrecautions
1-1-1 Warnings
1.Forsafetypurpose,do notattempttomodify
thecircuitboard,andalwaysdisconnecttheAC
powerbeforeperforming servicing on the
monitor.
2.Operationofthemonitoroutsideitscabinetor
withthecoverremovedinvolvestheriskof
shockhazard.Repairworkon themonitor
shouldonlybeattemptedbyservice personnel
who arethoroughlyfamiliarwithallnecessary
safetyprecautionsandproceduresforworking
onhighvoltageequipment.
3.DonotlifttheCRTby theneck.After
completelydischargingthehighvoltageanode,
handletheCRTonlywhenwearingshatterproof
goggles.TrytokeeptheCRTawayfromthe
bodyduringhandling.
4.Highvoltageshouldalwaysbekeptattherated
value,no higher.Onlywhenhighvoltageis
excessiveareX-rayscapableofpenetrating the
shelloftheCRT.Operation athigh voltages
mayalsocausefailureoftheCRTorhigh
voltagecircuitry.
5.TheCRTisespeciallyconstructedtolimit X-
rayemissionto0.5mR/HRat300microamperes
anodecurrent.ToensurecontinuedX-ray
protection,replacetheCRTwithonlythesame
orequivalenttypeastheoriginal,andadjustthe
anode’svoltagetothedesignatedmaximum
rating,nevertoexceed.
1-1-2Safety Checks
Beforereturningthemonitortotheuser,perform
thefollowingsafetychecks:
1.Inspecttomakecertainthateachleaddressis
notpinchedorthathardwareisnotlodged
betweenthechassisand othermetalpartsin
themonitor.
2.Inspectall protectivedevicessuchas
nonmetalliccontrolknobs,insulatingmaterials,
cabinetbacks,adjustmentand compartment
coversorshields,isolation resistor-capacitor
networks,mechanicalinsulators,etc.
3.ACLeakageCurrentCheck
AlwaysperformtheACLeakageCurrent
Checkon theexposedmetalparts,including
metalcabinets,screwheadsandcontrolshafts,
asfollows:
a)PlugtheAClinecorddirectlyintoarated
ACoutlet.Donotuseanisolation
transformerduringthecheck.
b)UseanACvoltmeterwithatleast5000
ohmspervolt sensitivityasfollows:
Connecta1500 ohms,10 watt resistor
paralleledbya0.15uFACcapacitorinseries
withall exposedmetalcabinetpartsand a
knownearthground,suchaselectrical
conductorelectricalground connectedto
earthground,asshownintheFigure1-1.
MeasuretheACvoltageacross the
combinationofresistorand capacitor.
c)ReversetheACplug attheACoutletand
repeatthestepsforACvoltage
measurementsforeachexposedmetalpart.
d)Voltagereadingmustnotexceed0.3volts
RMS,equivalentto0.2milliampereAC.Any
valueexceeding thislimit ill constitutea
potentialshockhazardand mustbe
correctedimmediately.
Figure1-1.SetUpForACLeakageCurrentCheck
To known
earth ground
1500 ohm 10 watt
0.15ufd
To exposed metal
cabinet part

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HPmx703/m703
1-1-3ProductSafety Notices
Manyelectricaland mechanicalpartsinthischassishavespecialsafety-relatedcharacteristicswhichare
oftennotevidentfromvisualinspection,theprotection affordedbythemmaynotbeobtainedbyreplacing
themwithcomponentsratedforhighervoltage,wattage,etc.Beforereplacing any ofthesecomponents,
consult theRecommendedSparePartsListgivenattheendofthismanual.Anyofthereplacementsthatdo
notprovidethesamesafetycharacteristicsmayresult inshock,fire,X-rayemission orotherhazards.
1-2ServicingPrecautions
Warning:Anelectrolyticcapacitorinstalledwiththewrongpolaritymightexplode.
Caution:Beforeperformingservicingcoveredbythisservicemanual,readandfollowtheSafetyPrecautions
section ofthismanual.
Note:If unforeseenconflictbetweenthefollowing servicing precautionsand any ofthesafety
precautions,alwaysfollowthesafetyprecautions
1.Followcloselytheservicingprecautionsprintedonthemonitorcabinetandchassis.
2.AlwaysunplugtheACpowercordfromtheACpowersourcebeforeremovingorinstallinganycomponent
orassembly,disconnectingPCBplugsorconnectorsand connecting atestcomponentinparallelwitha
capacitor.
3.Whenreplacing partsorcircuit boards,clamptheleadwiresaround thecomponentbeforesoldering.
4.Whenreplacing ahighwattageresistor(>0.5Wmetaloxidefilmresistor) inthecircuit board,keepthe
resistorabout1cm(1/2inch)awayfromthecircuitboard.
5.Keepwiresawayfromthehighvoltageorhigh temperaturecomponents.
6.Keepwiresintheiroriginalpositionssoastominimizeinterference.
7.Alwaysconnectatestinstrument’sgroundleadtotheinstrumentchassisgroundbeforeconnecting the
positivelead;alwaysremovetheinstrument’sground leadlast.
Afterputtingtherearcoverbackandmakesurethemonitorisworking properly,theHi-Pot&
Ground ContinuitytestsMUSTBE performedbeforethemonitorisreturnedtouser.
1-3Hi-PotTest
1.TestEquipment
PuncturetestmodelPM5530ADTorKIKUSUTOS-8750voltagetesterorequivalentapprovedequipment.
Note:Thetestequipmentmustbecalibratedinregularperiod.
2.TestSetup
a)Applyvoltage:DC2100 VDC
b)Testduration:3seconds
c)Cutoff currentshouldbesetto3mA
3.TestProcedure
a)UnplugpowercordfromACsource.
b)Putthepowerswitchofthemonitorinthe“ON”position.
c)Leavesignalcableun-connected.

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HPmx703/m703
d)Plug monitorpowercordtotheHiPottesterterminals.
e)Turnontesterandwatchtheindicatororbeeper.
f) Iftheindicatorlamplighten,orbeeperbeeps,thetestfails.
1-4Ground ContinuityTest
1.TestEquipment
AClowohmtesterTOS-6100 orequivalentapprovedequipment.
Note:Thetestequipmentmustbecalibratedinregularperiod.
2.TestSetup
a)Testduration:3seconds
b)Setcurrentlimit at25 A
c)Thegroundingresistancemustbelessthan0.1ohm.
3.TestProcedure
a)Plug themonitorpowercordtothetesterterminals.
b)Makesureall connectionsarewell-contacted.
c)Turnonmonitorpowerand testerpower.
d)Press“Test”button.
e) Ifgreenlightshowsup,meanstestOK.
Ifredlightshowsup,meanstestfails.
f) IftheTesterhasadigitaldisplay,theresistancevaluemustnotexceed0.1ohm.
Note:Besurenottotouchthemetalportionofthesignalcableheadduring testing.

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HPmx703/m703
2ProductSpecifications
2-1Specifications
Note:Abovespecificationsaresubjecttochangewithoutpriornotice.
Picture Tube 17-inch (16-inch Visual image area), sloted mask, 90 degrees deflection, dot type black matrix, medium short persistence
phosphor, dark tint, non-glare/ anti-static screen,
0.27 mm dot pitch for m703 and 0.25mm dot pitch for mx703
Scanning Frequency VGA, Super VGA, 1024x768@60/70/75/85 Hz
1280x1024@60Hz
Maximum Resolution 1280 dots (H) x 1024 lines (V) @60Hz refresh rate
Display Area 312 mm (H) x 234 mm (V) typical
Display Characters 80 char. x 60 rows on a 10 x 10 matrix
Display Colors Analog
Input Unlimited Colors
Synchronizatin Signals Separate Sync: horizontal/vertical, TTL, positive or negative
Synchronization
Frequencies Horizontal : 30 to 70 kHz Vertical : 50 to 140 Hz
Signal Connectors 15-pin, D-shell connector
Video Signals Analog : 0.7 Vp-p, RGB positive
Power Input 75 Watts (maximum) AC rated voltage, 100VAC to 240VAC
Misconvergence Center Area : <0.3 mm; Corner Area : <0.4mm
User Controls Power On/Off, Contrast, Brightness, Horizontal Size, Horizontal
Position, Vertical Size, Vertical Position, Pincushion, Trapezoid,
Rotation, Color temperature, Language, Display Frequency,
Degauss, Recall, H. Moire,
V. Moire
Service Controls PWB-1700
PWB-1697 : power voltage adjust (VR801)
Preset Modes 8 (see Table 2-2. Timing Chart)
Environmental
Considerations Operation temperature : 10oC to 35oC ambient Operation Humidity : 20% to 80% ambient
Storage temperature : -40oC to 65oC ambient
Storage Humidity : 10% to 90% (non-condensing)
Altitude : Non operating 40,000 feet sea level
operating 10,000 feet sea level

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HPmx703/m703
2-2SignalCablePinConnections
Table2-1.SignalCablePinAssignment
Note*Thispinisusedforselftestdetection.ConnectthispintogroundatthePCend.
** ForPC99:Thispinwillprovide+5VfromPCside.
Pin Signal Pin Signal
1Red video 9** +5V
2Green video 10 Digital Ground
3Blue video 11 Ground
4Ground 12 SDA
5* NC 13 H-Sync
6Red ground 14 V-Sync/VCL
7Green ground 15 SCL
8Blue ground

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HPmx703/m703
2-3TimingChart
Thissection describesthetimingsthatthecomputerindustryrecognizesasstandardforcomputer-generated
videosignals.
Table2-2.TimingChart
H.Parameters:
A:Period B:BlankingTime
C:SyncWidthD:BackPorch
E:ActiveTimeF:FrontPorch
V.Parameters:
G:Period H:BlankingTime
I:SyncWidthJ:BackPorch
K:ActiveTimeL:FrontPorch
Seperate Sync
Horizontal
Video
C
D
E
Sync
A
B
F
Vertical
Video
I
J
Sync
G
H
L
K
Mode 1 2 3 4 5 6 7 8 9
H. Dots 640 720 640 640 800 800 1024 1024 1280
V. Dots 480 400 480 480 600 600 768 768 1024
H-freq (kHz) 31.47 31.47 37.5 43.27 46.8 53.67 60.02 68.68 63.98
Sync Polarity - - - - +++++
A period us 31.78 31.78 26.666 23.11 21.333 18.63 16.66 14.56 15.63
B Blanking us 6.356 6.356 6.349 5.33 5.172 4.409 3.657 3.725 3.778
C Sync us 3.81 3.81 2.032 1.556 1.616 1.138 1.219 1.016 1.037
D B.P. us 1.907 1.907 3.81 2.22 3.232 2.702 2.235 2.201 2.296
E Active us 25.42 25.42 20.317 17.78 16.162 14.22 13 10.836 11.852
F F.P. us 0.636 0.636 0.508 1.556 0.323 0.569 0.203 0.508 0.444
V-freq (Hz) 59.95 70.08 75 85 75 85 75.03 85 60.02
Sync Polarity -+- - ++ + + +
O Period ms 16.68 14.27 13.33 11.76 13.333 11.76 13.33 11.77 16.661
P Blanking ms 1.43 1.557 0.533 0.67 0.533 0.578 0.533 0.582 0.656
Q Sync ms 0.064 0.064 0.08 0.069 0.064 0.056 0.05 0.044 0.047
R B.P. us 1.02 1.08 0.427 0.578 0.448 0.503 0.466 0.524 0.594
S Active us 15.25 12.71 12.8 11.09 12.8 11.18 12.8 11.18 16.005
T F.P. us 0.35 0.413 0.027 0.023 0.021 0.019 0.017 0.015 0.016

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HPmx703/m703
2-4Power SavingFunction
Note:Themonitorwillbedriveninto“PowerSaving” modeby thecontrolsignalfromthedisplay
controller,asindicatedby theamber-colorpowerLED.
Table2-3.PowerSavingFunction
Thepowersaving stateswillbekeptuntil acontrolsignalhasbeendetectedorthekeyboardormouseis
activated.TherecoverytimefromActiveOFF statebacktoON stateisaround 10seconds.
*Forpowerconsumption :75WMax.(@230VAC,presetsize andmaximumlightoutputcondition)
2-5TCOVersion(Optional)
ThemonitormeetstheTCO99,NUTEKenergysaving,electricand magneticfieldrequirements.Alsoit
iscompliantwithTCO99labellingscheme.
Theemissionfrommagneticandelectricfieldmustcomplywiththelimitsspecifiedby theSwedishBoard
forMeasurementand Testing,commonlyknownasMPR1990recommendations.Theselimitsaresum-
marizedintheTable2-4.
Table2-4.TCO95EmissionRequirements
VLF/TCO ELF/TCO
Magnetic Field 25 nT 200 nT
Electric Field 1 V/m 10 V/m
Frequency Range 2~400 kHz 5~2000 Hz
Value RMS RMS
Distance 30 cm 30 cm
Electrostatic
Potential +/- 500 V +/- 500 V
ThemonitorisdesignedwithselectedCRTandcarefullyroutedwiresaroundCRT,makesureexactlythe
State Power
Consumption LED
Light
ON Normal*Blue
Active
OFF <2 watts Amber