Panasonic CT-32SC13-1U Manual de usuario

MTNC030311A1

ColorTelevision

CT-32SC13-1U / CT-32SC13-1G / CT-36SC13-1U / CT-36SC13-

1G / CT-3653-1UG / CT-3653-1G

NA9FL

Thissimplifiedservice manual isissuedtoADD themodelsofthe

NA9FL familylistedabovetothemainservice manual orderNo.

MTNC020721C1(CT-32SX12F). Uniquesettings, schematics and

parts list areincludedinthissimplifiedmanual. Please fileanduse

thissimplifiedservice manual togetherwiththemainservice manual

orderNo. MTNC020721C1.

2003 Matsushita ElectricCorporation ofAmerica. All rights

reserved. Unauthorizedcopying and distribution isaviolation of

law.

1. Safetyprecautions

1.1. General guidelines

Anisolation transformershouldalways beusedduring theservicing ofareceiverwhose chassis

isnotisolatedfrom ACpowerline. Use atransformerofadequatepowerrating as thisprotects

thetechnicianfrom accidentsresulting inpersonal injuryfromelectrical shocks. Itwill also

protectthereceiverfrom being damagedbyaccidental shorting thatmay occur during servicing.

Whenservicing, observe theoriginal leaddress, especiallyinthehigh voltagecircuit. Replace all

damagedparts(alsopartsthatshowsignsofoverheating.)

Always replace protective devices, suchas fishpaper, isolation resistorsand capacitors, and

shieldsafterservicing thereceiver. Use onlymanufacturer’srecommendedrating for fuses,

circuitsbreakers, etc.

High potentialsarepresentwhenthisreceiverisoperating. Operation ofthereceiverwithoutthe

rearcoverintroduces dangerfor electrical shock. Servicing shouldnotbeperformedbyanyone

who isnotthoroughlyfamiliarwiththenecessaryprecautionswhenservicing high voltage

equipment.

Extremecareshouldbepracticedwhenhandling thepicturetube. Rough handling may cause it

toimplodeduetoatmosphericpressure. (14.7lbspersq. in.). Donotnick or scratchtheglass or

subjectittoanyunduepressure. Whenhandling, usesafetygoggles and heavy gloves for

protection. Dischargethepicturetubebyshorting theanodetochassisground (nottothe

cabinetor toothermounting hardware). Whendischarging connectcoldground (i.e. dagground

lead)totheanodewithawellinsulatedwireor use agrounding probe.Avoidprolongedexposure

atclose rangetounshieldedareas ofthepicturetubetopreventexposuretoxray radiation.

Thetestpicturetubeusedfor servicing thechassisatthebenchshouldincorporatesafetyglass

and magneticshielding. Thesafetyglass provideshielding for thetubeviewing area againstx

ray radiation as well as implosion. Themagneticshieldlimitsthexray radiation around thebell of

thepicturetubeinaddition totherestricting magneticeffects. Whenusing apicturetubetestjig

for service, ensurethatthejigiscapableofhandling 50kV withoutcausing xray radiation.

Beforereturning aservicedreceivertotheowner, theservice technicianmustthoroughlytest

theunittoensurethatiscompletelysafetooperate. Donotuse alineisolation transformerwhen

testing.

1.2. Leakagecurrentcoldcheck

Unplug theA.C. cord and connectajumperbetweenthetwoplug prongs.Measuretheresistance

betweenthejumperedACplug and expose metallicpartssuchas screwheads, antenna

terminals, control shafts, etc. Iftheexposedmetallicparthas areturnpathtothechassis, the

reading shouldbebetween240k and 5.2M . Iftheexposedmetallicpartdoes nothave a

return pathtothechassis, thereading shouldbeinfinite.

1.3. Leakagecurrenthotcheck

Plug theACcord directlyintotheACoutlet. Donotuse anisolation transformerduring thecheck.

Connecta1.5k 10 watt resistor inparallel witha0.15 Fcapacitor betweenanexposed

metallicpartand ground. Use earthground, for exampleawaterpipe.

Using aDVMwitha1000 ohms/voltsensitivityor higher, measuretheACpotential across the

resistor.

Repeattheprocedureand measurethevoltagepresentwithall otherexposedmetallicparts.

Verifythatanypotential does notexceed0.75 voltRMS. Aleakagecurrenttester(sucha

Simpson model 229, Sencoremodel PR57 or equivalent) may beusedintheabove procedure, in

whichcase anycurrentmeasuremustnotexceed0.5milliamp. Ifanymeasurementisoutofthe

specifiedlimits, thereisapossibilityofashock hazard and thereceivermustberepairedand

recheckedbeforeitisreturnedtothecustomer.

1.4. Xrayradiation

WARNING

Thepotential source ofxray radiation intheTV setisinthehigh voltagesection and thepicture

tube.

NOTE

Itisimportanttouse anaccurate, calibratedhigh voltagemeter.

Setthebrightness, picture, sharpness and color controlstominimum. Measurethehigh voltage.

Thehigh voltageshouldbe31.0±1.0kV. Iftheupperlimitisoutoftolerance, immediateservice

and correction isrequiredtoinsuresafeoperation and topreventthepossibilityofpremature

componentfailure.

2. About lead free solder(PbF)

NOTE

Leadislistedas (Pb)intheperiodictableofelements. / Intheinformation below, Pbwill referto

leadsolder, and PbF will refertoLeadFree Solder. / Theleadfree solderusedinour

manufacturing process and discussedbelowis(Sn+Ag+Cu). / ThatisTin(Sn), Silver(Ag)and

Copper(Cu)although othertypes areavailable.

Thismodel uses PbFree solderinit’smanufactureduetoenvironmental conservation issues. For

/ service and repairwork, we’dsuggesttheuse ofPbfree solderas well, although Pbsoldermay

be/ used. / PCBsmanufacturedusingleadfree solderwill have the“PbF”or aleafsymbol

stampedon the/ back ofPCB.

CAUTION

-Pbfree solderhas ahighermelting pointthanstandardsolder.

Typicallythemelting pointis50 ~70 °F(30 ~40 °C)higher. Please

use ahigh temperaturesoldering iron and set itto700 ±20 °F(370

±10 °C).

-Pbfree solderwill tend tosplashwhenheatedtoo high (about1100

°For600 °C). / Ifyou must use Pbsolder, please completely

removeall ofthePbfree solderon thepinsorsolderarea before

applying Pbsolder. Ifthisisnotpractical, besuretoheat thePb

free solderuntil itmelts, beforeapplying Pbsolder.

-Afterapplying PbF soldertodoublelayeredboards, please check

thecomponentsideforexcess solderwhichmayflow ontothe

opposite side.

2.1. SuggestedPbfree solder

Thereareseveral kindsofPbfree solderavailablefor purchase. Thisproductuses Sn+Ag+Cu

(tin, silver, copper)solder. However, Sn+Cu(tin, copper), Sn+Zn+Bi (tin, zinc, bismuth)soldercan

alsobeused.

3. Service notes

NOTE

These componentsareaffixedwithglue. Becareful nottobreak or damageanyfoil underthe

componentor atthepinsoftheICswhenremoving. Usuallyapplying heattothecomponentfor a

shorttimewhiletwisting withtweezerswill break thecomponentloose.

3.1. Leadless chipcomponent(surface mount)

Chipcomponentsmustbereplacedwithidentical chipsduetocritical foil track spacing. There

areno holes intheboard tomountstandard transistorsor diodes. Somechipscapacitor or

resistor board solderpadsmay have holes through theboard,howevertheholediameterlimits

standard resistor replacementto1/8watt. Standard capacitor may alsobelimitedfor thesame

reason. Itisrecommendedthatidentical componentsbeused.

Chipresistor have athree digitnumerical resistance code, 1stand 2nd significantdigitsand a

multiplier. Example:162 =1600 or 1.6k resistor, 0=0 (jumper).

Chipcapacitorsgenerallydo nothave thevalueindicatedon thecapacitor. Thecolor ofthe

componentindicates thegeneral rangeofthecapacitance.

Chiptransistorsareidentifiedbyatwolettercode. Thefirstletterindicates thetypeand the

second letter, thegradeoftransistor.

Chipdiodes have atwoletteridentification codeas perthecodechartand areadual diodepack

witheithercommon anodeor common cathode. Check thepartslistfor correctdiodenumber.

3.2. Componentremoval

1. Use solderwick toremovesolderfromcomponentend capsor

terminal.

2. Withoutpulling up, carefullytwist thecomponentwithtweezersto

break theadhesive.

3. Donotreuse removedleadless orchipcomponents since theyare

subject tostress fractureduring removal.

3.3. Chipcomponentinstallation

1. Putasmall amountofsolderon theboardsoldering pads.

2. Holdthechipcomponentagainst thesoldering padswithtweezers

orwithaminiaturealligatorclipand applyheat tothepadarea

witha30 watt iron until solderflows. Donotapplyheat formore

than3seconds.

3.4. How toreplace Flat IC(requiredtools)

1. Removethesolderfromall ofthepinsofaFlat ICbyusing a

desolderbraid

2. Puttheiron wireunderthepinsoftheFlat ICand pull itinthe

direction indicatedwhileheating thepinsusing asoldering iron. A

small awl canbeusedinsteadoftheiron wire.

3. Removethesolderfromall thepadsoftheFlat ICbyusing ade

solderbraid

4. Position thenew Flat ICinplace (applythepinsoftheFlat ICto

thesoldering padswherethepinsneedtobesoldered). Properly

determinethepositionsofthesoldering padsand pinsby

correctlyaligning thepolaritysymbol

5. Solderall pinstothesoldering padsusing afinetippedsoldering

iron

6. Check withamagnifierforsolderbridgebetweenthepinsorfor

dryjointbetweenpinsand soldering pads. To removeasolder

bridge, use adesolderbraidas showninthefigurebelow

IMPORTANT

To protect against possibledamagetothesolidstate devices dueto

arcing orstaticdischarge, make certainthat all ground wires are

securelyconnected

CAUTION

Thepowersupplycircuitisaboveearthground and thechassis

cannotbepolarized. Use anisolation transformerwhenservicing

thereceivertoavoiddamagetothetest equipmentortothe

chassis. Connect thetest equipmenttotheproperground(HOTor

COLD)whenservicing, orincorrect voltages will bemeasured.

WARNING

Thisreceiverhas beendesignedtomeet orexceedapplicablesafety

and xrayradiation protection as specifiedbygovernmentagencies

and independenttesting laboratories.

To maintainoriginal product safetydesign standardsrelativetox

rayradiation and shock and firehazard, parts indicatedwiththe

symbol on theschematicmust bereplacedwithidentical parts.

Orderparts fromthemanufacturer’spartscenterusing theparts

numbersshowninthisservice manual, orprovidethechassis

numberand thepartreference number.

Foroptimumperformance and reliability, all otherparts shouldbe

replacedwithcomponents ofidentical specification.

3.5. Horizontal oscillatordisablecircuit

Thischassisemploys aspecial circuittoprotectagainstexcessive high voltageand beam

current. If, for anyreason, thehigh voltageand beam currentexceedapredeterminedlevel this

protective circuitactivates and detunes thehorizontal oscillatorthatlimitsthehigh voltage. The

overvoltageprotection circuitisnotadjustable. However, ifcomponentsindicatedbythe

symbol on theschematicineitherthehorizontal sweepsystem or theovervoltage

protection circuititselfarechanged, theoperation ofthecircuitshouldbecheckedusing the

following procedure:

1. DC ammeter

2. High voltagemeter(0 ~50kVelectrostatic)

3. Variac orisolation transformer

4. HHSjig

Preparation:

1. Connect receivertoAC120 Volts. DonotturnON

2. Connect HIGHVOLTAGEmeterto2nd anode(H.V. button).

Note:

Use coldground for negative lead.

3. Connect theammeterserial fromtheflyback anodeleadtothe

picturetubeanodesocket.

4. PrepareHHSjigtobeconnectedbetweenTPD50 and TPD51 as

showninthefigure

Procedure:

1. OpenconnectorA17.

2. TurnpowerONand applyawhite pattern.

3. Set currentwithin50-100 Abychanging thepictureand bright

controls.

4. TurnpowerOFF.

5. Connect HHSjigbetweenTPD50 and TPD51 (VRshouldbeturn

fullyclockwise).

6. Turnpoweron.

7. Turnslowlythevariableresistortoincrease thecurrentuntil the

horizontal syncfrequencyabruptlyincreases indicating that the

horizontal frequencyisjust beginning topull outofsync. Maintain

thecurrentwithin50-100 Abychangingthepictureand bright

controls

8. Observethehigh voltagemeter. HIGHVOLTAGEshouldreadless

than36kV.

9. TurnpowerOFF, removeHHSjig, HVmeter, ammeterand connect

A17 connector.

10. TurnpowerON. Reset PICTUREand BRIGHTNESS controls.

Confirm B+ 140V±1.5Vwith120VACapplied

Note:

Ifhigh voltageisnotwithinthespecifiedlimit, thecause mustbedeterminedbeforethereceiver

isreturnedtotheowner.

4. Receiverfeaturetable

FEATURE/MODEL CT-32SC13-1G/-1U, CT-36SC13-1G/-1U CT-3653-1G/-1UG

MICRO 128K

MENU LANGUAGE ENG/SPAN/FR

CLOSE CAPTION X

V-CHIP (USA/CANADA X

CHANNELINFOBANNER X

VIDEOINPUTSKIP SKIP

CHANNELCOUNT 181

75 OHMINPUT X

REMOTE CONTROL(TV ONLY) ------ EUR7713010

REMOTE CONTROL(W/LIGHT) EUR7613Z60 (silver)

CRTSUPPLIER MDDA(FLAT4:3)

CHASSIS NA9FL

COMBFILTER 3-LINE

HEC/VEC(X=BOTH) X

VM X (DIGITAL)

V/ANORM(X=BOTH) X

COLORTEMP X

PRESET/INPUTLABELING X

VIDEOPICTURE MEMORY X

MTS/SAP/DBX X

BUILT-INAUDIOPOWER 5Wx2 7.5Wx2

No. OFSPEAKERS 2

SPEAKERTYPE DOME

BASS/BALANCE/TREBLE

CONTROL X

AISOUND X

SURROUND X

SPATIALIZER/BBE BBE

A/V IN(REAR/FRONT) 3(2/1)

A/V PROGRAMOUT X

AUDIOOUT(FAO:F, VAO:V) F, V

COMPONENTINPUT(Y, Pb, Pr) 1

S-VHS INPUT(REAR/FRONT) 1/1

EPJ/HPJ/MISC HPJ

NOTE:

CT-3653-1Gand CT-3653-1UGincludes EUR7613Z60 remotecontrol and anextraremotecontrol

withpartnumberEUR7713010

5. Boarddescription table

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