Panasonic NV-HV61GN User manual

ORDERNO. MAV0404002C8
VideoCassette Recorder
NV-HV61GN/ NV-HV61EE / NV-HV61GCU / NV-HV61GH/ NV-
HV61GHT / NV-HV61PX
R4-MECHANISM
SPECIFICATIONS
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1. INTRODUCTION
1.1. INTRODUCTION
Thisservice manual containstechnical information whichwill allowservice personnel to
understand and service thismodel.
Ifthecircuitischangedor modified, thisinformation will befollowedbysupplementaryservice
manual tobefiledwithoriginal service manual.
Note:
1. Adjustmentprocedures, DisassemblyProcedures and Assembly
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Procedures forMechanismChassisareseparate volumefromthis
service manual.
Please refertotheservice manual forR4-MechanismChassis.
(OrderNo. VRD0202010C8)
2. TheModel No. isindicatedon theSchematicDiagramand Circuit
BoardDiagramsas follows.
Model No. Indication Mark
NV-HV61GN (A)
NV-HV61EE (B)
NV-HV61GCU (C)
NV-HV61GH/GHT (D)
NV-HV61PX (E)
1.2. ABOUTLEADFREE SOLDER(PbF)
Distinction ofPbF PCB:
PCBs(manufactured)using leadfree solderwill have aPbF stampon thePCB.
Caution:
-Pbfree solderhas ahighermelting pointthanstandardsolder,
Typicallythemelting pointis50-70°F(30-40°C)higher. Please use
ahigh temperaturesoldering iron. Incase ofsoldering iron with
temperaturecontrol,please set itto700±20°F(370±10°C)
-Pbfree solderwill tend tosplashwhenheatedtoo high (about
1100°F/600°C).
Whensoldering or unsoldering, please completelyremove all ofthesolderon thepinsor solder
area, and besuretoheatthesoldering pointswiththePbfree solderuntil itmeltsenough.
2. GENERALDESCRIPTIONS
2.1. SERVICECAUTION-1
WhentheMicroprocessor IC6001 and/or Back-up batteryB7751 arereplaced, readthefollowing
procedurecarefullyand proceedit.
[REASONS]
ThereisaRAMintheIC6001, whichisbacking up:
1. ProgrammeNavigation Data [See NOTE1]
2. TVTuning Data
3. PG ShifterAdjustmentData
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4. Option Setting Data
WhenIC6001 arereplaced, all above listeddatabecomenotavailable.
These dataisbackedup byusing thepowersource of:
*ACConnected:ACPowersource
*ACDisconnected:Back-up Battery(B7751)&Back-up Capacitor (C7752)
[NOTE1]
Asfor your reference, withoutinserting atapeintoaVCR, you canconfirm thattheNAVIdata
thatisback up withIC6001 as showninthefollowing steps.
1. Indicate the"NAVI"markon theFrontInformation Panel. (Press
theMenu button and select theoption, thenset the"NAVI"toON
mode.)
2. Turnon theService Modeand press the"NAVI"button on the
Remote Controllerinmorethan5seconds. The"NAVI"data list is
displayedon theMonitor. (Press the"MENU"button on the
Remote Controllerforcancellation.)
Although storedNAVIdatacanbeconfirmedon themonitor, thereisno way totransfertheNAVI
datatoIC6001whichisnewlymounted.
2.1.1. REPLACINGPROCEDURE [IC6001]
[1.PREPARATION]
Beforereplacing IC6001:
1. Take note that storedTVbroadcast channels. (Because, its user
maystoreTVbroadcasts bymanuallyotherthan"AutoTuning"
operation and itisalsoerased.)
NOTE:
During servicing, do notmake ashortcircuitbetweenIC6001-pin37 (5V)withotherline/
Componentsotherwise IC6001 may bebroken.
CAUTION:
*Whenreplacing theB7751, besuretoread/follow the"HOWTO
REPLACETHELITHIUMBATTERY"section.
[2.REPLACINGPROCEDURE INSTEPS]
STEP1.PREPARATION
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1. Disconnect theACplug beforeremoving theC.B.A. with
Mechanismunitbyreferring totheDisassemblyprocedure.
STEP2.REPLACE THE IC6001
1. Replace theIC6001. (Donotmake ashortcircuitbetweenIC6001-
pin37 and otherpins/Components.)
STEP3.RESETTHE IC6001 ATONCE
1. Connect theACplug.
2. Connect ajumperwirebetweenTL7510 (RESET)and TL7509
(GND)forasecond toreset theMicroprocessorIC6001.
Note:
Since theresistance atpin2as well as pin3ofIC6001 decides themodel distinction data, there
isno needtosetup theModel code, whichisnecessaryinthepreviousmodels.
STEP4.LINE-INSETTING&ACTIVATE PLUG-INA.T.P.
1. Press theChannel up and downkeyssimultaneouslyformore
than3seconds, underthecondition oftheno tapeisintheunit.
2. Confirm that "A1"and "A2"canbedisplayedon theFIPby
pressing theCH UPand CH DOWNbuttons.
NOTE:
If"DIRECTREC" on theOPTIONsetting screenissetto[ON], theinputsignal isfixedto"A1",
and theChannel up and downkeys arenoteffective.
3. Disconnect theACplug forfew secondsand connect itagain, and
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press POWERbutton forturning thepowertoon fromoff tocarry
outthe"Plug inAutoTunerPreset".
4. Since otherthanthechannelsthat canbestoredby"AutoTuning"
operation arenotavailableyet, preset manuallybyconsulting the
note ofits availableTVchannelsofwhichyou tookbefore.
NOTE:
TheFactoryshipping condition ofOSDsetting isnotrestoredbyabove operation.
5. ChangetheOSDsetting totheFactoryshipping condition if
necessary, byreferring toOption Setting on theOperating
Instructionsas showninthefollowing chart.
STEP5.TAPE INTERCHANGEABILITYADJUSTMENT
RefertotheElectrical AdjustmentProcedures.
2.2. CAUTIONFORACMAINSLEAD(NV-HV61GH/ GHT)
2.3. HOWTO REPLACETHELITHIUMBATTERY
2.3.1. GENERALDESCRIPTION
ThereisaRAMintheIC6001, whichisbacking up thefollowing databyusing thepowersource
ofB7751 (Back-up Battery)and C7752 (Back-up Capacitor:Back-up timeisapproximately30
minutes).
1. ProgrammeNavigation Data
2. TVTuning Data
3. PG ShifterAdjustmentData
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4. Option Setting Data
2.3.2. REPLACEMENTPROCEDURE
NOTE:
Thisworkshouldbefinishedwithin30 minutes sothattheRAMdatawouldnotbelostas
running outofcurrentfrom theBack-up Capacitor C7752.
1. RemovetheTop Panel and MechanismunitwithMainC.B.Aby
referring totheDisassembling Procedure.
2. UnsoldertheLithiumBattery:B7751 and thenreplace itwithanew
one(See Fig. B1).
Fig. B1
NOTE:
Thelithium batteryisacritical component(ManufacturedbyPanasonic.)
Itmustneverbesubjectedtoexcessive heator discharge.
Itmustthereforeonlybefittedinequipmentdesignedspecificallyfor itsuse.
Replacementbatteries mustbeofthesametypeand manufacture.
They mustbefittedinthesamemannerand location as theoriginal battery, withthecorrect
polaritycontactsobserved.
Donotattempttore-chargethebatteryor re-use itfor anyotherpurpose.
Itshouldbedisposedofinwasteproductsdestinedfor burial ratherthanincineration.
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2.4. SERVICECAUTION-2
2.4.1. CAUTIONFORAUTOTUNING
PROCEDURE
AutoTuning will startbythefollowing procedure.
1. Connect theDIN-RFCable.
2. Connect theACMainsLead.
3. Turnon theVCR.
AutoTuning will start.
AutoTuning searchforTVstationsfromVHSminimumtoUHF
maximumand memorizes everytunedprogramposition. Other
programpositionsareskipped.
AutoTuning takes fiveormoreminutes tocomplete its search.
DonottouchtheVCR during AutoTuning.
AutoTuning will stop halfway, iftheVCR isoperatedortheaerial
leadand/orthemainsleadaredisconnected.
Incase theVCR stoppedduring AutoTuning, theVCR has tobe
reset and restarted. See thefollowing item2.
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NOTE:
1. IftheVCR isturnedon withtheantennanotconnected, all
channelsareskipped. Therefore, firmlyconnect theantennaand
thenturntheVCR off and on againtoexecute Autotuning.
2. WhenAutoTuning iscanceledhalfway, AutoTuning isnotexecute
eveniftheVCR isturnedoff and thenturnedon again,
Inthiscase, AutoTuning has toberestartedbythefollowing
procedures.
A. Press EJECTand removetheVideocassette.
B. KeepUPand DOWNon theVCR pressedsimultaneouslyfor3
secondsormoreduring theVCR on.
Thechannel displayedon theVCR displaydisappearsfor
momentthenchanges to2.
C. Turnoff theVCR and thenturniton. AutoTuning commences.
3. Ifyou turntheVCR off during AutoTuning, AutoTuning will stop
halfway.
TheVCR shouldbereset and restartedbytheitem2inorderto
execute AutoTuning.
4. IftheVCR starts playback during AutoTuning, AutoTuning will
stop halfway.
TheVCR shouldbereset and restartedbytheitem2inorderto
execute AutoTuning.
5. To cancel AutoTuning Mid-operation, press POWERDuring Auto
Tuning (TheVCR isturnedoff).
6. WhentheVCR ismovedtotheotherarea orcountry, TV
broadcasts shouldbestoredagain.
2.4.2. CHECKINGOFMAINC.B.A.
Whenservicing theMAINC.B.A., take outtheMAINC.B.A. and mechanism from theframe. Turn
theMAINC.B.A. overas shownin Fig. S1.
Fig. S1
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2.4.3. REMOVALOFCASSETTE TAPE
Whenthecassettetapecouldnotbeuninstalledfrom anelectrical malfunction, Thereare2ways
toremove acassettetape.
1. Removal bycompulsoryunloading.
A. Press FF and EJECTbutton simultaneouslyformorethan3
secondsand set theService Modeto7.
B. Press STOPbutton inordertounloadthemechanism. (Pay
attention totapeslack)
Service ModeIndication:
7** ** (STOP)70L** (EJECT)
2. Removal bymanual operation byrotating theLoading Motorwith
thebatteries.
A. Disconnect theACplug, and removetheTop Panel and the
FrontPanel byreferring totheDisassemblyProcedures.
B. Connect three batteries (1.5Vspec.)totheLoading Motorin
series forsupplying 4.5Vtorotate theLoading Motoras shown
in Fig. S2.Fig. S2
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