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
1

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.
2

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
3

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
4

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
5

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
7

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
8

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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Torelease from thismode, press PLAYor STOP button.
4.1.8. CAUTIONFORINSTALLATIONOFFRONTPANELASS'Y
CAUTION:
OpenerLevermay bedamagedwhenFrontPanel Ass'y isinstalled, withCassetteDoor-Lidof
FrontPanel Ass'y and OpenerLeverofCassetteUpAss'y setincorrectly.
Install theFrontPanel Ass'y as follows:
1. Swing theCassette Door-Lidall thewayopenuntil theCassette
DoortabclearstheOpenerLever.
2. Make surethat all locking tabsarealignedproperly. Then, press
theFrontPanel straightin.
Fig. 4
4.1.9. METHODFORLOADING/UNLOADINGOFMECHANISM
(Manual Method)
Turn theLoading Gearclockwise (for loading)or counterclockwise (for unloading)using
needlenose pliersetc.
Note:
Donotuse thismethod ifMechanismisjammedorlocked.
Fig. 5-1
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(Electrical Method)
Apply+10.0V DC PowerSupplytotheLoading Motor terminals.
Loading
DC+toPortion "a," DC -toPortion "b"
Unloading
DC -toPortion "a," DC+toPortion "b"
CAUTION:
Beforeapplying DC PowerSupply, besuretodisconnect theMotor
LeadsfromtheConnectorP2503.
Otherwise, theLoading MotorDriveIC(IC2501) maybedamaged.
Fig. 5-2
Whenloading withoutacassette, pushPortion "a" on theHolderUnitofCassetteUpAss'y so
thattheLevercleartheFirstTaband Second Tab.
Fig. 5-3
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4.1.10. HOWTOREMOVE AJAMMEDTAPE
CAUTION:
WiperArm Unitmay bedamagedor itsspring may beoutofplace whenthejammedtapeis
removedbyforce.
Remove ajammedtapeas follows:
4.1.10.1. Manual Method
Whenatapejam isencountered, check thetapeloading condition and use thefollowing
proceduretoremove atapejam.
Fig. 6-1
4.1.10.1.1. Method -1:
1. MovethePinchRollerUnitoutbyunhooking thePinofPinchArm
Unitsothat thePinchRollerisseparatedfromtheCapstanRotor
Unitshaft. Fig. 6-2
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2. Removethetapefromthetapepath.
3. Rewind thetapeintothecassette byrotating theCenterClutch
Unitcounterclockwise.
4. UnhookSpring (A)oftheDriveRack Arm.
5. RemoveScrew (A).
6. Lift theCassette UpAss'y. Whilepulling theCassette UpAss'yout
farenough sothat itclearstheDriveRack Arm, slidetheDrive
Rack Unitas indicatedbythearrow toremovethecassettetape
fromtheCassette UpAss'y.
7. Check thecause ofmechanical troubleand repair.
Fig. 6-3
4.1.10.1.2. Method -2:
1. Rotate Loading Motorcounterclockwise withneedlenose pliers,
etc. sothat thePinchRollerisseparatedfromtheshaft ofthe
CapstanRotorUnit.
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2. Perform Step2through Step7ofMethod -1.
4.1.10.1.3. Method -3:
1. Perform Step2through Step7ofMethod -1.
Note:
Afterrepairing mechanical trouble, make surethat all gear
alignments arecorrect, especiallytheWiperArm Unitand Drive
Rack UnitofCassette UpAss'y. (Referto"EJECTPosition
Confirmation"inDISASSEMBLY/ASSEMBLYPROCEDURES.)
4.1.10.2. Electrical Method
Electrical method canonlybeperformedwhenthemechanism ismovedbyrotating theLoading
Gear.
CAUTION:
1. Beforeapplying DC PowerSupply, besuretodisconnect the
MotorLeadsfromtheConnectorP2503.
Otherwise, theLoading MotorDriveIC(IC2501) maybedamaged.
2. Ifloading does notstartinapprox. 2secondsafterDC Power
Supplyisapplied, DO NOTcontinuetoapplyDC PowerSupply.
Instead, perform "Manual Method."
1. Besuretodisconnect theMotorLeadsfromtheConnectorP2503.
2. Apply+10.0VDC PowerSupplytotheLoading Motorterminals.
3. WhentheLoading Posts reachthefullyunloadedposition, remove
thePowerSupply. Fig. 7
4. Rewind thetapeintothecassette byturning theCenterClutchUnit
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counterclockwise.
5. Eject thecassette byapplying+10.0VDC PowerSupplyagain.
4.1.11. BLACK SCREWS ONTHE CHASSIS
Black Screwsareusedon theMechanism Chassistoidentifyscrewsthatrequireadjustment.
4.1.12. HOWTORESETALL VCR MEMORY FUNCTIONS
Toreset(clear)theselectlanguage, channel autosetand setclock functionstotheirinitial
poweron condition (poweron, nocassetteinserted), holddownthePLAYand CH UP buttonson
theunittogetherfor morethan5seconds.
Powerwill shutoff.
4.1.13. HOWTOCONFIRMAUTOCLOCK SETFEATURE
1. Connect anRFcablefromtheoutputofoneunittotheinputofthe
test unit.
2. Select corresponding RFchannels.
3. Playback arecording ofP.B.S. channel including clock set data
and confirm thisfeature.
4.1.14. VARIABLE VOLTAGE ISOLATIONTRANSFORMER
AnIsolation Transformershouldalways beusedduring theservicing ofVCR whose chassisis
notisolatedfrom theACpowerline. Use atransformerofadequatepowerrating as thisprotects
thetechnicianfrom accidentsresultinginpersonal injuryfrom electrical shocks. Itwill also
protectVCR from being damagedbyaccidental shorting thatmay occur during servicing.
Also, whentroubleshooting theabove typeofPowerSupplyCircuit, avariableisolation
transformerisrequiredinordertoincrease theinputvoltageslowly.
4.1.15. SPECIALNOTE
All integratedcircuitsand manyothersemiconductor devices areelectrostaticallysensitive and
thereforerequirethespecial handling techniques describedunderthe
"ELECTROSTATICALLYSENSITIVE (ES)DEVICES" section ofthisservice manual.
4.1.16. REPLACEMENTPROCEDURE FORLEADLESS (CHIP)COMPONENTS
Thefollowing procedures arerecommendedfor thereplacementoftheleadless components
usedinthisunit.
1. Preparation forreplacement
A. Soldering Iron
Use apencil-typesoldering iron that uses less than30 watts.
B. Solder
EutecticSolder(Tin63%, Lead37%)isrecommended.
C. Soldering time
Donotapplyheat formorethan4seconds.
D. Preheating
Leadless capacitormust bepreheatedbeforeinstallation. -
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(266°F~302°F)
(130°C~150°C)forabout2minutes.
Note:
A. Leadless components must notbereusedafterremoval.
B. Excessivemechanical stress and rubbing ofthecomponent
electrodemust beavoided.
2. Removing theleadless component
Grasptheleadless componentbodywithtweezersand alternately
applyheat tobothelectrodes. Whenthesolderon bothelectrodes
ismelted, removetheleadless componentwithatwisting motion.
Note:
A. Donotattempttolift thecomponentoff theboarduntil the
componentiscompletelydisconnectedfromtheboardbya
twisting action.
B. Becareful nottobreak thecopperfoil on theprintedcircuit
board. Fig. 8-1
3. Installing theleadless component
A. Presolderthecontact points on thecircuitboard.
Fig. 8-2
B. Press thepartdownwardwithtweezersand solderboth
electrodes as shownbelow. Fig. 8-3
Note:
Donotgluethereplacementleadless componenttothecircuit
17

board.
4.1.17. MODELNO. IDENTIFICATIONMARK
Use Marks showninthechartbelowtodistinguishthedifferentmodelsincludedinthisService
Manual.
4.2. IC, TRANSISTORAND CHIPPARTINFORMATION
4.2.1. HOWTOREAD THE IDENTIFICATIONMARK OFCHIP COMPONENTS.
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4.2.2. HOWTOREAD THE VALUES OFTHE CYLINDRICALTYPE CHIP
COMPONENTS.
Thewidestcolor band mustbereadfirstfor value.
1. RESISTOR
Therearetwotypes (ERD10LLJ... and ERD10TLJ...)ofchipparts.
A. ERD10LLJ:Refertoabovetype.
B. ERD10TLJ:Thenarrow colorband must bereadfirst forvalue.
Ifthispartisincludedintheparts list, besurethat the
colorband isreadproperlywhenservicing.
2. CAPACITOR
Because ofthewidthofthecolorbands, thereading direction
cannotbespecified. However, thecolorband canbereadon either
side. Besuretoconfirm thevalueusing theschematicdiagram.
CAUTION:
Once chipparts areremoved, theymust notbereused.
Alwaysuse anew partwheninstalling achippart.
5. DISASSEMBLY/ASSEMBLYPROCEDURES
5.1. CABINETSECTION
5.1.1. DisassemblyFlowchart
Perform all disassemblyprocedures intheorderdescribedinthe"DisassemblyFlowchart"
shownbelow. Whenreassembling, use thereverse procedure.
CAUTION:
Disconnect ACplug beforedisassembly.
Fig. D1
19

5.1.2. DisassemblyMethod
Howtoreadchartshownabove:
A:OrderofProceduresteps.
Whenreassembling, perform steps(s)inreverse order.
These numbersarealsousedas theidentification (location)No. ofpartsinFigures.
B: Parttoberemovedor installed.
C: Fig. No. showing Procedureor PartLocation.
D: Identification ofparttoberemoved, unhooked, unlocked, released, unpluggedor unsoldered.
2(S-1)=2Screws(S-1), 2(L-1)=2Locking Tabs(L-1),
(P-1)=Spring (P-1)
E:Referto"Notes in chart."
Fig. D2
20