Panasonic Omnivision PV-V4600 User manual

ORDERNO. MKE0001002C1
B3
VideoCassette Recorder
PV-V4600 / PV-V4620 / PV-V4620-K/ PV-V4630-K/ PV-V4640
/ PV-V4640-K/ PV-V4660
SPECIFICATIONS
1. SAFETYPRECAUTIONS
GENERALGUIDELINES
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1. IMPORTANTSAFETYNOTICE
Therearespecial components usedinthisequipmentwhichare
importantforsafety. These parts aremarkedby intheSchematic
Diagrams, CircuitBoardLayout, ExplodedViewsand Replacement
Parts List. Itisessential that these critical parts shouldbe
replacedwithmanufacturer'sspecifiedparts topreventshock, fire
orotherhazards. Donotmodifytheoriginal design without
permissionofmanufacturer.
2. AnIsolation Transformershouldalwaysbeusedduring the
servicing ofVCR whose chassisisnotisolatedfromtheACpower
line. Use atransformerofadequate powerrating as thisprotects
thetechnicianfromaccidents resulting inpersonal injuryfrom
electrical shocks. Itwill alsoprotect VCR frombeing damagedby
accidental shorting that mayoccurduring servicing.
3. Whenservicing, observetheoriginal leaddress. Ifashortcircuit
isfound, replace all parts whichhavebeenoverheatedor
damagedbytheshortcircuit.
4. Afterservicing, see toitthat all theprotectivedevices suchas
insulation barriers, insulation papersshieldsareproperlyinstalled.
5. Afterservicing, make thefollowing leakagecurrentchecks to
preventthecustomerfrombeing exposedtoshock hazards.
LEAKAGE CURRENTCOLDCHECK
1. Unplug theACcordand connect ajumperbetweenthetwoprongs
on theplug.
2. Measuretheresistance value, withanohmmeter, betweenthe
jumperedACplug and eachexposedmetalliccabinet parton the
equipmentsuchas screwheads, connectors, control shafts, etc.
Whentheexposedmetallicparthas areturnpathtothechassis,
thereading shouldbebetween1M and 5.2M . Whenthe
exposedmetal does nothaveareturnpathtothechassis, the
reading must beinfinity.
LEAKAGE CURRENTHOTCHECK
(See figure1.)
1. Plug theACcorddirectlyintotheACoutlet. Donotuse an
isolation transformerforthischeck.
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2. Connect a1.5k , 10 Wresistor, inparallel witha0.15 F
capacitor, betweeneachexposedmetallicparton theset and a
good earthground, as showninfigure1.
3. Use anACvoltmeter, with1k /Vormoresensitivity, tomeasure
thepotential across theresistor.
4. Check eachexposedmetallicpart, and measurethevoltageat
eachpoint.
5. Reverse theACplug intheACoutlet and repeat eachoftheabove
measurements.
6. Thepotential at anypointshouldnotexceed0.75 VRMS. A
leakagecurrenttester(Simpson Model 229 orequivalent) maybe
usedtomake thehotchecks. Leakagecurrentmust notexceed1/2
mA. Incasea measurementisoutsideofthelimits specified, there
isapossibilityofashock hazard, and theequipmentshouldbe
repairedand recheckedbeforeitisreturnedtothecustomer.
Figure1
2. PREVENTIONOFELECTRO-STATICDISCHARGE
(ESD) TO ELECTROSTATICALLYSENSITIVE (ES)
DEVICES
Somesemiconductor (solidstate)devices canbedamagedeasilybystaticelectricity. Such
componentscommonlyarecalledElectrostaticallySensitive (ES)Devices. Examples oftypical
ES devices areintegratedcircuits, somefield-effecttransistorsand semiconductor "chip"
components. Thefollowing techniques shouldbeusedtohelpreduce theincidence of
componentdamagecausedbyelectrostaticdischarge(ESD).
1. Immediatelybeforehandling anysemiconductorcomponentor
semiconductor-equippedassembly, drainoff anyESDon your
bodybytouching aknownearthground. Alternatively, obtain
andwearacommerciallyavailabledischarging ESDwrist strap,
whichshouldremoveelectrostaticchargeforpotential shock
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reasonspriortoapplying powertotheunitundertest.
2. Afterremoving anelectrical assemblyequippedwithES devices,
place theassemblyon aconductivesurface suchas aluminum
foil, topreventelectrostaticchargebuildup orexposureofthe
assembly.
3. Use onlyagrounded-tipsoldering iron tosolderorunsolderES
devices.
4. Use onlyanantistaticsolderremoval device. Somesolderremoval
devices notclassifiedas "antistatic(ESDprotected)"cangenerate
electrical chargesufficienttodamageES devices.
5. Donotuse freon-propelledchemicals. These cangenerate
electrical charges sufficienttodamageES devices.
6. DonotremoveareplacementES device fromits protective
packageuntil immediatelybeforeyou arereadytoinstall it. (Most
replacementES devices arepackagedwithleadselectrically
shortedtogetherbyconductivefoam, aluminumfoil orcomparable
conductivematerial).
7. Immediatelybeforeremoving theprotectivematerial fromthe
leadsofareplacementES device, touchtheprotectivematerial to
thechassisorcircuitassemblyintowhichthedevice will be
installed.
CAUTION:Besureno powerisappliedtothechassisorcircuit,
and observeall othersafetyprecautions.
8. Minimizebodilymotionswhenhandling unpackagedreplacement
ES devices. (Otherwise harmless motion suchas thebrushing
togetherofyourclothes fabricorthelifting ofyourfootfroma
carpetedfloorcangenerate staticelectricity(ESD)sufficientto
damageanES device).
"NOTE toCATV system installer:
Thisreminderisprovidedtocall theCATV system installer's attention toArticle820-22 ofthe
NECthatprovides guidelines for propergrounding and, inparticular, specifies thatthecable
ground shall beconnectedtothegrounding system ofthebuilding, as close tothepointofcable
entryas practical."
3. OPERATIONGUIDE
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4. SERVICE NOTES (PLEASE READ)
4.1. SERVICENOTES
4.1.1. SIMPLIFIEDFAULT FINDINGDATA
SimplifiedSelf-DiagnosticSystem facilitates finding thecause ofthefault. A4digitfaultcodewill
bedisplayedinF.I.P.
TheSimplifiedFaultfinding dataisstoredintheMemoryIC(IC6005). Thisdataisclearedafterit
isdisplayed, and thenthePOWERbutton ispressedback on.
1. Withpowerturnedoff, press VCR/TVbutton on VCR (forover3
secondsifVCR isnotinshutoff condition).
Fig. 1-1
2. Faultcode(4 digitnumber)will bedisplayedinF.I.P. as shown.
Fig. 1-2
Fig. 1-3
Fig. 1-4
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Fig. 1-5
Fig. 1-6
3. Whilepressing VCR/TVbutton on VCR withpowerturnedoff,
press anyoperation button on eitherVCR, orremote todetect that
akeyhas beenpressed.
The1st digitchanges to"0"onlywhenkeyisdetected.
Fig. 1-7
4. When1to4listedinLock codeoccurs, Lock data will bestored
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intoEEPROMIC(Currentdata, Last Lock data, and theLast Lock
data beforelast). Lock data displayedinF.I.P. will bechangedby
pressingCH DOWNbutton.
Fig. 1-8
Note:
1. Lock data will bekeptafterACCordisunplugged.
2. When1to4listedinLock codeoccurs, theVCR goes intoVCR
shut-off condition. VCR stopsand all VCR function buttonsexcept
forpowerbecomenon-operational.
4.1.2. USAGE SCREENMODE
Thisfunction displays theTotal lapsedtimewithpoweron (day)and theTotal lapsedtimewith
Cylinderrotation (hour)on theTV monitor.
1. Withpowerturnedon withoutacassette, press VCR/TVbutton on
VCR and 7keyon remote together.
TheUSAGESCREENwill bedisplayedon theTVMonitor.
Fig. 1-9
Note:
Afterreplacing theCylinderUnit, press COUNTERRESETbutton
on remote inthismode. OnlyTotal lapsedtimewithCylinder
rotation (hour)will beclearedto0.
2. To release fromUsageScreenMode, press anyoperation button
on VCR inthismode. VCR will returntonormal operation mode.
4.1.3. EEPROMIC(IC6005), MAINC.B.A. REPLACEMENTNOTE
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Afterreplacing EEPROMIC(IC6005)or MainC.B.A., besuretoperform the"PG SHIFTER
ADJUSTMENT" inELECTRICALADJUSTMENTprocedures.
4.1.4. SERVICE POSITION
4.1.4.1. Service Position
CAUTION:
HOTCIRCUIT(Primarycircuit) exists on theMainC.B.A.
Use extremecaretopreventaccidental shock whenservicing.
4.1.4.1.1. Service Position (1)
Fig. 2-1
4.1.4.1.2. Service Position (2)
Fig. 2-2
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Note:
1. Alternativemethod inService Position (2)
2piledVHSCassette Tapes canbesubstitutedfortheFrameas
showninFig. 2-2.
2. Whenrecording inService Position (2), shorttheS-TabSW. Pins
on foil sideofMainC.B.A. toturnthisSW. on.
Fig. 2-3
3. Place thetapebetweentheCassette UpAss'yand MainC.B.A. to
get astability.
4. Whendisassembling/assembling, referto"CABINET SECTION"in
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DISASSEMBLY/ASSEMBLYPROCEDURES.
4.1.5. HOTCIRCUIT
Primarycircuitexistson theMainC.B.A.
Thiscircuitisidentifiedas " HOT" on theC.B.A. and intheService Manual. Use extremecareto
preventaccidental shock whenservicing.
4.1.6. SERVICE MODE
Inordertoinhibitdetection oftheSupply&Takeup PhotoTransistors, Reel Sensor, and Cylinder
Lock, press and holdVCR/TV button and CH DOWNbuttonson VCR togetherover5secondsin
poweroff condition.
Fig. 3-1
Thepowercomes on and theunitgoes intoservice mode.
Inthismode, Mechanism movementcanbeconfirmed. Whenremoving CassetteUpAss'y, itcan
beconfirmedwithoutacassette.
Torelease from thismode, press POWERbutton off or disconnectACPlug.
4.1.7. TRACKINGCENTERMODE (TRACKINGFIX ATCENTER)
InserttheCassettetape. SettheunitintoService Mode. Play back theCassettetape. Press PLAY
button inPlay back mode. "TRACKINGCENTER" will bedisplayedon theTV monitor. Inthis
mode, thetracking isfixedatcenter. (Autotracking and manual tracking functionsarenot
operational.)
Fig. 3-2
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