Panasonic TX-43P250 Manual de usuario

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Service Manual

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ORDERNO.ITD0110012C3

Projection Television

lTX-43P250/TX-51P250/TC-43P250/TC-51P250

EURO-7VPChassis

Specifications

PowerSource:

TX-43/51P250, TC-51P250H:AC220V-240V, 50/60Hz

TX-43/51P250X:AC110V-240V, 50/60Hz

PowerConsumption:

TX-43/51P250, TC-51P250H:228W

TX-43/51P250X:238W

3.0W(Stand-by condition)

AerialImpedance:

75 unbalanced,Coaxial type

TuningSystem:

21Systems

FrequencySynthesizer

AutoSearch

100(Position)/125(Direct)

Receiving Channels:

VHF Band 2-12(PAL/SECAM-B,K1)

0-12(PAL-B AUST.)

1-9 (PAL-B N.Z.)

1-12(PAL/SECAM-D)

1-12(NTSC-MJAPAN)

2-13(NTSC-MU.S.A.)

UHF Band 21-69(PAL-G,H,I)

21-69(SECAM-G,K,K1)

28-69(PAL-B AUST.)

13-57(PAL-D,K)

13-62(NTSC-MJapan)

14-69(NTSC-MU.S.A.)

CATVS1-S20(OSCAR)

S21-S41 (HYPER)

1-125(U.S.A.CATV)

5A, 9A(AUST.)

Z1-Z37(CHINA)

C13-C49(JAPAN)

Intermediate Frequency:

Video38.0MHz

Sound31.5MHz(D, K)/32.0MHz(I)

32.5MHz(B, G)/33.5MHz(M)

Colour33.57MHz(PAL)/33.6MHz(SECAM)

33.75MHz(SECAM)/34.42 MHz(NTSC)

Receiving Stereosoundsystem:

NICAMB/G,NICAMI,

NICAMD, A2(German)

ScreenSize:

Type51 Type43

Diagonal: 296 mm1092 mm

Height:780 mm655 mm

Width:1037 mm874 mm

Projection Tube:

Type51 Type43

TVVAB10GAV (B-ASSY)TVVAB10GLV(B-ASSY)

TVVAG10GAV (G-ASSY) TVVAG10GLV(G-ASSY)

TVVAR10GAV (R-ASSY)TVVAR10GLV(R-ASSY)

90°deflection

High Voltage:

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5SelfCheck

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1.Self-Checkisusedtoautomaticallycheck thebuslinesand hexadecimalcodeoftheTVset.

2.Togetinto theSelf-Checkmodepressthedown(

)button on thecustomercontrolsatthefrontoftheset,atthesametimepressingtheHELP

button on theremotecontrol,and thescreenwill show:

IftheCCUportshavebeencheckedand found tobeincorrectornotlocatedthen “--”willappearin

placeof“O.K.”.

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7.1DynamicFocusAdjustment

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1.Focusadjustmentsshouldbeperformedafter1hourofaging.

2.Useoscilloscopewith100 :1probe.

3.Applymonoscopepattern.

4.AdjusttheRed,Blueand GreenfocusVRon thefocusblockforbestfocusofoverall picture

ofeachCRT.(Fig.2)

Fig. 2

5.ConnectthescopeprobetoTPD20,GND toTPD21.Scopesetat20V/div&5msec./div.

6.AdjustV-PARA(Servicemode1)sothatwaveform(A)is380V±20V.(Fig.3)

7.AdjustH-PARA(Servicemode1)sothatwaveform(B)is560V±40V.(Fig.3)

Fig. 3

8.ProceedwithFocusAdjustments.

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7.2ElectricalFocusAdjustment

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1.Receiveamonoscopepattern.

2.CovertheRedand BlueCRT,projectingGreenonly.

Theelectricalfocuscontrolsarelocatedon thefront.AdjusttheGreenFocusVRforbest

focusofoverallpicture.(Fig.2)

3.RepeatforRedfocusVRwhileprojectingRedonly.

4.RepeatforBlue.(Bestfocusatbottomleftcornerofscreen)

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7.3Optical LensFocusAdjustment

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Note:

Thisadjustmentnormallyshouldnotrequireresettingunlessthelenshasbeenreplacedor

adjustmenthaschanged.

1.Opticalfocusadjustmentislocatedon thetop ofeachCRTlenssystem. Loosenthe

adjustmentknurlslockingknob.(Fig.4)

Fig. 4 (Rearview)

2.TurntheReceiverON applyand viewamonoscopepattern.

3.AdjusteachlensfocusforbestfocuswhileviewingeachCRT.

4.CovertheRedand BlueCRT,projectinggreenonly.RotatetheGreenlensforbestfocus

around screencenterarea.

5.DothesamefortheRedfocuslenswhileprojectingRedonly.

6.RepeatforBlue.

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7.4CenteringMagnetAdjustment

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1.Receiveamonoscopepattern.

2.ConfirmthatCoarseconvergencedata(Servicemode1)forR,Gand Bis0.

3.SetthatFineconvergencedata(Servicemode1)isclear(no correction).

4.SetthatV-Posdata(Servicemode1)is[100].

5.SetthatH-Posdata(Service mode1)is[55].

6.SetthatH-Paralleldata(Servicemode1)is[8].

Procedure:

1.CovertheRed, BlueCRTlens,projectingGreenonly.

2.Adjustgreencenteringmagnet(DY)iftheprojectedgreen horizontal/verticallinedoesnot

lineup withthescreenhorizontal/verticalcenterline.

3.CovertheGreen,RedCRTlens,projectingBlueonly.

4.Repeatstep2.forblue.

5.CovertheGreen,BlueCRTlens,projectingRedonly.

6.Repeatstep2.forred.

7.CovertheRed, BlueCRTlens,projectingGreenonly.

8.Adjustgreencenteringmagnetsuntilthecenterofthemonoscopepatternlineup withthe

screencenterline.

9.CovertheGreen,RedCRTlens,projectingBlueonly.

10.Adjustbluecenteringmagnetstoposition thecenterofthebluerasterW2awayfromthe

centerofthegreenraster.

11.CovertheGreen,BlueCRTlens,projectingRedonly.

12.Adjustredcenteringmagnetstoposition thecenteroftheredrasterW1awayfromthecenter

ofthegreenraster.

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7.5Alignment magnetAdjustment

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Preparation:

1.Receiveancrosshatchpatternwithdots(pincushion).

2.Loosenthecenteringmagnetsscrews.

3.Positionthelongertabofthefour-polemagnetto90 degrees(uncorrectedposition).

VMCoilwith focuscorrection magnet

4-polemagnet

4.Positionthelongtabofall alignmentmagnetsand ofthedummyringtogetherinan

uncorrectedposition.

Alignmentmagnet(ordummyring)

Procedure:

1.Receiveancrosshatchpatternwithdots.

2.CovertheRed, BlueCRTlens,projectingGreenonly.

3.TurnthegreenelectricalfocusadjustmentVR(on focuspack)fullycounterclockwiseand note

theposition ofthedotsatthecenterofthepicture.

4.TurnthegreenelectricalfocusadjustmentVRfullyclockwise.

5.Adjustthefourpolemagnetsuntiltheshapeofthedotatthecenterofthescreeniscircular.

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6.AdjustforbestgreenelectricalfocuswithgreenelectricalfocusadjustmentVR.

7.CovertheGreen,RedCRTlens,projectingBlueonly.

8.Repeatstep4.~step6.forblueelectricalfocus.

9.CovertheGreen,BlueCRTlens,projectingRedonly.

10.Repeatstep4.~step6.forredelectricalfocus.

11.Receiveanmonoscopepattern.

12.CovertheRed, BlueCRTlens,projectingGreenonly.

13.Ifthecenterofthemonoscopepatternisnotinsidethe15mm circle,showninbelow,adjust

thecenteringmagnets.Repeatthealignmentmagnetadjustmentsand fourpolemagnet

adjustments(step1.~step6.)

Centering magnetadjustment

14.CovertheGreen,BlueCRTlens,projectingRedonly.

15.Repeatstep13.forthered.

16.CovertheGreen,RedCRTlens,projectingBlueonly.

17.Repeatstep13.fortheblue.

18.Followingadjustments,fixthecenteringmagnetsofDY,dummyringsofVMcoil,fourpole

magnetsofVMcoil and thealignmentmagnetsofVMcoil topreventthemfrommoving.

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14 Schematic Diagram

14.1. Schematic Diagram Notes

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