Panasonic OmniVision PV-QV200 User manual

ORDERNO. MKE0001000C1
B3
VideoCassette Recorder
PVQ-V200 / PV-V4020 / VHQ-400 / VHQ-40M/ PV-V4520 / PV-
V4540
SPECIFICATIONS
2000 Matsushita-Kotobuki Electronics Industries LTD. All rights
reserved. Unauthorizedcopying and distribution isaviolation of
law.
1. SAFETY PRECAUTIONS
GENERALGUIDELINES
1. IMPORTANTSAFETY NOTICE

Therearespecial components usedinthisequipmentwhichare
importantfor safety. These parts aremarkedby inthe
SchematicDiagrams, CircuitBoardLayout, ExplodedViewsand
ReplacementParts List. Itisessential that these critical parts
shouldbereplacedwithmanufacturer's specifiedparts toprevent
shock, fireor otherhazards. Donotmodifytheoriginal design
withoutpermissionofmanufacturer.
2. AnIsolation Transformershouldalwaysbeusedduring the
servicing ofVCR whose chassisisnotisolatedfrom theAC
powerline. Use atransformerofadequate powerrating as this
protects thetechnicianfromaccidents resulting inpersonal injury
from electrical shocks. Itwill alsoprotect VCR from being
damagedbyaccidental shorting that mayoccur during servicing.
3. Whenservicing, observetheoriginal leaddress. Ifashortcircuit
isfound, replace all parts whichhavebeenoverheatedor
damagedbytheshortcircuit.
4. Afterservicing, see toitthat all theprotectivedevices suchas
insulation barriers, insulation papersshieldsareproperly
installed.
5. Afterservicing, make thefollowing leakagecurrentchecks to
preventthecustomerfrom being exposedtoshock hazards.
LEAKAGECURRENTCOLD CHECK
1. Unplug theACcord and connect ajumperbetweenthetwo
prongson theplug.
2. Measuretheresistance value, withanohmmeter, betweenthe
jumperedACplug and eachexposedmetalliccabinet parton the
equipmentsuchas screwheads, connectors, control shafts, etc.
Whentheexposedmetallicparthas areturn pathtothechassis,
thereading shouldbebetween1M and 5.2M . Whenthe
exposedmetal does nothaveareturn pathtothechassis, the
reading must beinfinity.
LEAKAGECURRENTHOTCHECK
(See figure 1.)
1. Plug theACcord directlyintotheACoutlet. Donotuse an
isolation transformerfor thischeck.

2. Connect a1.5k , 10 Wresistor, inparallel witha0.15 F
capacitor, betweeneachexposedmetallicparton theset and a
good earthground, as showninfigure1.
3. Use anACvoltmeter, with1k /V or moresensitivity, tomeasure
thepotential across theresistor.
4. Check eachexposedmetallicpart, and measurethevoltageat
eachpoint.
5. Reverse theACplug intheACoutlet and repeat eachoftheabove
measurements.
6. Thepotential at anypointshouldnotexceed0.75 V RMS. A
leakagecurrenttester(Simpson Model 229 or equivalent) maybe
usedtomake thehotchecks. Leakagecurrentmust notexceed1/
2mA. Incasea measurementisoutsideofthelimits specified,
thereisapossibilityofashock hazard, and theequipmentshould
berepairedand recheckedbeforeitisreturnedtothecustomer.
Figure 1
2. PREVENTIONOF ELECTRO-STATICDISCHARGE
(ESD) TO ELECTROSTATICALLY SENSITIVE (ES)
DEVICES
Some semiconductor(solidstate)devices canbe damagedeasilybystatic electricity. Such
components commonlyare calledElectrostaticallySensitive (ES)Devices. Examples of typical
ES devices are integratedcircuits, some field-effecttransistors and semiconductor"chip"
components. The following techniques shouldbe usedto helpreduce the incidence of
component damage causedbyelectrostatic discharge (ESD).
1. Immediatelybeforehandling anysemiconductor componentor
semiconductor-equippedassembly, drainoff anyESDon your
bodybytouching aknownearthground. Alternatively, obtain
andwearacommerciallyavailabledischarging ESDwrist strap,
whichshouldremoveelectrostaticchargefor potential shock

reasonsprior toapplying powertotheunitundertest.
2. Afterremoving anelectrical assemblyequippedwithES devices,
place theassemblyon aconductivesurface suchas aluminum
foil, topreventelectrostaticchargebuildup or exposureofthe
assembly.
3. Use onlyagrounded-tipsoldering iron tosolderor unsolderES
devices.
4. Use onlyanantistaticsolderremoval device. Somesolder
removal devices notclassifiedas "antistatic(ESDprotected)"can
generate electrical chargesufficienttodamageES devices.
5. Donotuse freon-propelledchemicals. These cangenerate
electrical charges sufficienttodamageES devices.
6. DonotremoveareplacementES device from its protective
packageuntil immediatelybeforeyou arereadytoinstall it. (Most
replacementES devices arepackagedwithleadselectrically
shortedtogetherbyconductivefoam, aluminum foil or
comparableconductivematerial).
7. Immediatelybeforeremoving theprotectivematerial from the
leadsofareplacementES device, touchtheprotectivematerial to
thechassisor circuitassemblyintowhichthedevice will be
installed.
CAUTION:Besureno powerisappliedtothechassisor circuit,
and observeall othersafetyprecautions.
8. Minimizebodilymotionswhenhandling unpackagedreplacement
ES devices. (Otherwise harmless motion suchas thebrushing
togetherofyour clothes fabricor thelifting ofyour footfrom a
carpetedfloor cangenerate staticelectricity(ESD) sufficientto
damageanES device).
"NOTEto CATVsysteminstaller:
This reminderis providedto call the CATVsysteminstaller's attention to Article 820-22 of the
NEC thatprovides guidelines forpropergrounding and, inparticular, specifies thatthe cable
ground shall be connectedto the grounding systemof the building, as close to the point of
cable entryas practical."
3. OPERATIONGUIDE

4. SERVICE NOTES (PLEASE READ)
4.1. SERVICE NOTES
4.1.1. SIMPLIFIEDFAULT FINDINGDATA
SimplifiedSelf-Diagnostic Systemfacilitates finding the cause of the fault. A4 digitfaultcode
will be displayedinF.I.P.
The SimplifiedFaultfinding data is storedinthe MemoryIC (IC6005). This data is clearedafterit
is displayed, and thenthe POWER button is pressedback on.
1. Withpowerturnedoff, press VCR/TV button on VCR (for over3
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

Fig. 1-5
Fig. 1-6
3. Whilepressing VCR/TV button on VCR withpowerturnedoff,
press anyoperation button on eitherVCR, or remote todetect that
akeyhas beenpressed.
The1st digitchanges to"0"onlywhenkeyisdetected.
Fig. 1-7

4. When1to4listedinLock codeoccurs, Lock data will bestored
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 bekeptafterACCord isunplugged.
2. When1to4listedinLock codeoccurs, theVCR goes intoVCR
shut-off condition. VCR stopsand all VCR function buttons
exceptfor powerbecomenon-operational.
4.1.2. USAGE SCREENMODE
This function displays the Total lapsedtime with poweron (day)and the Total lapsedtime with
Cylinderrotation (hour)on the TVmonitor.
1. Withpowerturnedon withoutacassette, press VCR/TV button on
VCR and 7keyon remote together.
TheUSAGE SCREENwill bedisplayedon theTV Monitor.
Fig. 1-9
Note:

Afterreplacing theCylinderUnit, press COUNTERRESETbutton
on remote inthismode. OnlyTotal lapsedtimewithCylinder
rotation (hour)will beclearedto0.
2. Torelease from UsageScreenMode, press anyoperation button
on VCR inthismode. VCR will return tonormal operation mode.
4.1.3. EEPROM IC(IC6005), MAINC.B.A. REPLACEMENT NOTE
Afterreplacing EEPROMIC (IC6005)orMainC.B.A., be sure to performthe "PG SHIFTER
ADJUSTMENT"inELECTRICALADJUSTMENTprocedures.
4.1.4. SERVICEPOSITION
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

Note:
1. Alternativemethod inService Position (2)
2piledVHS Cassette Tapes canbesubstitutedfor theFrameas
showninFig. 2-2.
2. Whenrecording inService Position (2), shorttheS-TabSW. Pins
on foil sideofMainC.B.A. toturn thisSW. on.
Fig. 2-3
3. Place thetapebetweentheCassette UpAss'yand MainC.B.A. to
get astability.
4. Whendisassembling/assembling, referto"CABINET SECTION"in

DISASSEMBLY/ASSEMBLY PROCEDURES.
4.1.5. HOT CIRCUIT
Primarycircuitexists on the MainC.B.A.
This circuitis identifiedas "HOT"on the C.B.A. and inthe Service Manual. Use extreme care to
prevent accidental shock whenservicing.
4.1.6. SERVICEMODE
Inorderto inhibitdetection of the Supply& Takeup Photo Transistors, Reel Sensor, and
CylinderLock, press and holdVCR/TVbutton and CH DOWN buttons on VCR togetherover5
seconds inpoweroff condition.
Fig. 3-1
The powercomes on and the unitgoes into service mode.
Inthis mode, Mechanismmovement canbe confirmed. Whenremoving Cassette UpAss'y, it
canbe confirmedwithout a cassette.
Torelease from this mode, press POWER button off ordisconnectAC Plug.
4.1.7. TRACKINGCENTERMODE(TRACKINGFIXAT CENTER)
Insertthe Cassette tape. Setthe unitinto Service Mode. Playback the Cassette tape. Press
PLAYbutton inPlayback mode. "TRACKINGCENTER"will be displayedon the TVmonitor. In
this mode, the tracking is fixedatcenter. (Autotracking and manual tracking functions are not
operational.)
Fig. 3-2

Torelease from this mode, press PLAYorSTOPbutton.
4.1.8. CAUTIONFORINSTALLATIONOFFRONT PANELASS'Y
CAUTION:
OpenerLevermaybe damagedwhenFront Panel Ass'yis installed, with Cassette Door-Lidof
Front Panel Ass'yand OpenerLeverof Cassette UpAss'ysetincorrectly.
Install the Front Panel Ass'yas follows:
1. Swing theCassette Door -Lidall thewayopenuntil theCassette
Door tabclearstheOpenerLever.
2. Make surethat all locking tabsarealignedproperly. Then, press
theFrontPanel straightin.
Fig. 4
4.1.9. METHODFORLOADING/UNLOADINGOFMECHANISM
(Manual Method)
Turnthe Loading Gearclockwise (forloading) orcounterclockwise (forunloading) using
needlenose pliers etc.
Note:
Donotuse thismethod ifMechanismisjammedor locked.
Fig. 5-1

(Electrical Method)
Apply+10.0 VDC PowerSupplyto the Loading Motorterminals.
Loading
DC+to Portion "a,"DC -to Portion "b"
Unloading
DC -to Portion "a,"DC+to Portion "b"
CAUTION:
Beforeapplying DC PowerSupply, besuretodisconnect theMotor
Leadsfrom theConnector P2503.
Otherwise, theLoading Motor DriveIC(IC2501) maybedamaged.
Fig. 5-2
Whenloading without a cassette, pushPortion "a"on the HolderUnitof Cassette UpAss'yso
thatthe Leverclearthe FirstTaband Second Tab.
Fig. 5-3

4.1.10. HOWTOREMOVE AJAMMEDTAPE
CAUTION:
WiperArmUnitmaybe damagedorits spring maybe out of place whenthe jammedtape is
removedbyforce.
Remove a jammedtape as follows:
4.1.10.1. Manual Method
Whena tape jamis encountered, check the tape loading condition and use the following
procedure to remove a tape jam.
Fig. 6-1
4.1.10.1.1. Method -1:
1. MovethePinchRollerUnitoutbyunhooking thePinofPinchArm
Unitsothat thePinchRollerisseparatedfrom theCapstanRotor
Unitshaft. Fig. 6-2

2. Removethetapefrom thetapepath.
3. Rewind thetapeintothecassette byrotating theCenterClutch
Unitcounterclockwise.
4. UnhookSpring (A)oftheDriveRack Arm.
5. RemoveScrew(A).
6. Lift theCassette UpAss'y. Whilepulling theCassette UpAss'y
outfarenough sothat itclearstheDriveRack Arm, slidetheDrive
Rack Unitas indicatedbythearrowtoremovethecassettetape
from theCassette UpAss'y.
7. Check thecause ofmechanical troubleand repair.
Fig. 6-3
4.1.10.1.2. Method -2:
1. Rotate Loading Motor counterclockwise withneedlenose pliers,
etc. sothat thePinchRollerisseparatedfrom theshaft ofthe
CapstanRotor Unit.

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/ASSEMBLY PROCEDURES.)
4.1.10.2. Electrical Method
Electrical method canonlybe performedwhenthe mechanismis movedbyrotating the
Loading Gear.
CAUTION:
1. Beforeapplying DC PowerSupply, besuretodisconnect the
Motor Leadsfrom theConnector P2503.
Otherwise, theLoading Motor DriveIC(IC2501) maybedamaged.
2. Ifloading does notstartinapprox. 2secondsafterDC Power
Supplyisapplied, DO NOTcontinuetoapplyDC PowerSupply.
Instead, perform "Manual Method."
1. Besuretodisconnect theMotor Leadsfrom theConnector P2503.
2. Apply+10.0V DC PowerSupplytotheLoading Motor terminals.
3. WhentheLoading Posts reachthefullyunloadedposition,
removethePowerSupply. Fig. 7
4. Rewind thetapeintothecassette byturning theCenterClutch

Unitcounterclockwise.
5. Eject thecassette byapplying+10.0V DC PowerSupplyagain.
4.1.11. BLACK SCREWSONTHECHASSIS
Black Screws are usedon the MechanismChassis to identifyscrews thatrequire adjustment.
4.1.12. HOWTORESET ALL VCR MEMORYFUNCTIONS
Toreset(clear)the selectlanguage, channel auto setand setclock functions to theirinitial
poweron condition (poweron, nocassette inserted), holddownthe PLAYand CH UPbuttons
on the unittogetherformore than5 seconds.
Powerwill shut off.
4.1.13. HOWTOCONFIRM AUTOCLOCK SET FEATURE
1. Connect anRFcablefrom theoutputofoneunittotheinputof
thetest unit.
2. Select corresponding RFchannels.
3. Playback arecording ofP.B.S. channel including clock set data
and confirm thisfeature.
4.1.14. VARIABLEVOLTAGE ISOLATIONTRANSFORMER
AnIsolation Transformershouldalways be usedduring the servicing of VCR whose chassis is
not isolatedfrom the AC powerline. Use a transformerof adequate powerrating as this
protects the technicianfrom accidents resultinginpersonal injuryfrom electrical shocks. Itwill
alsoprotectVCR from being damagedbyaccidental shorting thatmayoccurduring servicing.
Also, whentroubleshooting the above type of PowerSupplyCircuit, a variable isolation
transformeris requiredinorderto increase the input voltage slowly.
4.1.15. SPECIALNOTE
All integratedcircuits and manyothersemiconductordevices are electrostaticallysensitive and
therefore require the special handling techniques describedunderthe
"ELECTROSTATICALLYSENSITIVE (ES)DEVICES" section of this service manual.
4.1.16. REPLACEMENT PROCEDUREFORLEADLESS (CHIP) COMPONENTS
The following procedures are recommendedforthe replacement of the leadless components
usedinthis unit.
1. Preparation for replacement
A. Soldering Iron
Use apencil-typesoldering iron that uses less than30 watts.
B. Solder
EutecticSolder(Tin63%, Lead37%)isrecommended.
C. Soldering time
Donotapplyheat for morethan4seconds.
D. Preheating
Leadless capacitor must bepreheatedbeforeinstallation. -

(266°F~302°F)
(130°C~150°C) for about2minutes.
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 theboard until the
componentiscompletelydisconnectedfrom theboard bya
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 thepartdownward withtweezersand solderboth
electrodes as shownbelow. Fig. 8-3
Note:
Donotgluethereplacementleadless componenttothecircuit

board.
4.1.17. MODELNO. IDENTIFICATIONMARK
Use Marks showninthe chartbelowto distinguishthe different models includedinthis Service
Manual.
4.2. IC, TRANSISTORAND CHIP PARTINFORMATION
4.2.1. HOWTOREADTHEIDENTIFICATIONMARK OFCHIPCOMPONENTS.

4.2.2. HOWTOREADTHEVALUES OFTHECYLINDRICALTYPE CHIP
COMPONENTS.
The widestcolorband mustbe readfirstforvalue.
1. RESISTOR
Therearetwotypes (ERD10LLJ... and ERD10TLJ...)ofchipparts.
A. ERD10LLJ:Refertoabovetype.
B. ERD10TLJ:Thenarrowcolor band must bereadfirst for value.
Ifthispartisincludedintheparts list, besurethat the
color band isreadproperlywhenservicing.
2. CAPACITOR
Because ofthewidthofthecolor bands, thereading direction
cannotbespecified. However, thecolor band canbereadon
eitherside. Besuretoconfirm thevalueusing theschematic
diagram.
CAUTION :
Once chipparts areremoved, theymust notbereused.
Alwaysuse anewpartwheninstalling achippart.
5. DISASSEMBLY/ASSEMBLY PROCEDURES
5.1. CABINETSECTION
5.1.1. DisassemblyFlowchart
Performall disassemblyprocedures inthe orderdescribedinthe "DisassemblyFlowchart"
shownbelow. Whenreassembling, use the reverse procedure.
CAUTION:
Disconnect ACplug beforedisassembly.
Fig. D1

5.1.2. DisassemblyMethod
Howto readchartshownabove:
A:Orderof Procedure steps.
Whenreassembling, performsteps(s)inreverse order.
These numbers are alsousedas the identification (location) No. of parts inFigures.
B:Partto be removedorinstalled.
C:Fig. No. showing Procedure orPartLocation.
D:Identification of partto be removed, unhooked, unlocked, released, unpluggedorunsoldered.
2(S-1)=2 Screws (S-1), 2(L-1)=2 Locking Tabs (L-1),
(P-1)=Spring (P-1)
E:Referto "Notes in chart."
Fig. D2