Philips CDR-775 User manual

Compactdiscrecorder CDR775
Service
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SERVICING
ForservicingCDR775,thesetcandividedintothreeparts.
1. Thedisplayboard(partly) 1 002,theI/Oboard1004,the
headphoneboard(partly) 1002, theIRboard(partly)1002,theON/
OFF& StandbyLEDboard(partly)1002andtheCD-outboard
(partly)1002havetoberepairedatcomponentlevel.Thepower
supplyunit1003isavailableassparepart,butcanalsoberepaired
atcomponentlevel.
2. TheCDRmodule(containingtheCDRloader 81, CDRmainboard
1001andloaderbracket82,83)willbeexchangedcompletelyin
caseoffailure.ThiscompleteCDRmoduleisavailableasspare
part.Defectivemoduleshavetobereturnedforcentralrepair.
3.TheCDmodule(containingtheCDloader 131, CDmainboard
1005andloaderbracket132)isa newmodulewithVAL1250
loaderassybutalsoaseparateCDMandseparateloader parts will
beavailableviaservicestock.TheCDmainboardcanberepaired
atcomponentlevel.
Alsoavailable:CircuitDescription" TheBasicsofCompactDisc
Recordable/Rewriteable".Servicecodenumber482272525242.
Copyrightreserved1999PhilipsConsumerElectronicsB.V.Eindhoven,The
Netherlands.Allrightsreserved.Nopartofthispublicationmaybereproduced,
storedinaretrievalsystemor transmitted, inany form or by any means, electronic,
mechanical,photocopying,orotherwisewithoutthepriorpermissionofPhilips.
MOfTAlAUOtOMBtTAlAUDIO PtGfTAlAUMOOHHTALAUDIO
Contents
1. TechnicalSpecifications
2. WarningandServicingHints
3.UserInstructions
4. MechanicalInstructions
WiringDiagramCDR
WiringDiagramCDloader
ExplodedViewCDR
ExplodedViewCDloader
DismantlingInstructions
5.ElectricalandCircuitDiagrams
OverallBlockdiagram
DisplayBoard
IR/ On/Off&StandbyLEDBoard
Headphone/ CD-outBoard
I/OBoard
Powersupplyunit
CD-Mainboard1A
CD-Mainboard1B
CD-Mainboard1C
CD-Mainboard2
6.DiagnosticSoftware
7.FaultfindingTrees
8.FaultfindingGuide
9.ListofAbbreviations
10. Partslist(mechanicalandelectrical)
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PublishedbyRH9969ServiceDPSHasselt PrintedintheNetherlands Subjecttomodification <§§>310412540030
PHILIPS

WarningsandServicingHints
SERVICINGHINTS
Intheset,chipcomponentshavebeenapplied.Fordisassemblyandassemblycheckthefigurebelow.
CL96532086_022.eps
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CDR775 WarningsandServicingHints
SAFETYGUIDELINESFORTHEPROFESSIONALSERVICETECHNICIAN
Important
ProperserviceandrepairisImportanttothesafe,reliableoperation
ofallPhilipsequipment.Theserviceproceduresrecommendedby
PhilipsanddescribedInthisservicemanualareeffectivemethodsof
performingserviceoperations.Someoftheseserviceoperations
requiretheuseoftoolsspeciallydesignedforthepurpose.The
specialtoolsshouldbeusedwhenandasrecommended,
ItisImportanttonotethatthismanualcontainsvariousCAUTIONS
andNOTICESwhichshouldbecarefullyreadInordertominimizethe
riskofpersonalinjurytoservicepersonnel.Thepossibilityexists
thatImproperservicemethodsmaydamagetheequipment.Italso
IsImportanttounderstandthattheseCAUTIONSandNOTICES
ARENOTEXHAUSTIVE,Philipscouldnotpossiblyknow,evaluate
andadvisetheservicetradeofallconceivablewaysInwhichservice
mightbedoneorofthepossiblehazardousconsequencesofeach
way.Consequently,Philipshasnotundertakenanysuchbroad
evaluation. Accordingly,a servicerwhousesa serviceprocedureor
toolwhichIsnotrecommendedbyPhilipsmustfirstsatisfyhimself
thoroughlythatneitherhissafetynorthesafeoperationofthe
equipmentwillbeJeopardizedbytheservicemethodselected.
SafetyChecks
Aftertheoriginalserviceproblemhasbeencorrected,a complete
safetycheckshouldbemade.Besuretocheckovertheentireset,
notJusttheareaswhereyouhaveworked.Somepreviousservicer
mayhaveleftanunsafecondition,whichcouldbeunknowingly
passedontoyourcustomer.Besuretocheckallofthefollowing:
FireandShockHazard
1. BesureallcomponentsarepositionedInsucha wayastoavoid
thepossibilityofadjacentcomponentshorts.Thisisespecially
importantonthoseunitswhicharetransportedtoandfromthe
serviceshop.
2. Neverreleasea repairedunitunlessallprotectivedevicessuch
asinsulators,barriers,covers,strainreliefs,andother
hardwarehavebeeninstalledaccordingtotheoriginaldesign,
3.Solderingandwiringmustbeinspectedtolocatepossiblecold
solderJoints,soldersplashes,sharpsolderpoints,frayed
leads, pinchedleads,ordamagedInsulation(Includingtheac
cord). BecertaintoremoveloosesolderballsandaHother
looseforeignparticles.
4. Checkacross-the-linecomponentsandothercomponentsfor
physicalevidenceofdamageordeteriorationandreplaceif
necessary.Followoriginallayout,leadlength,anddress.
5.Noleadorcomponentshouldtoucha resistorratedat 1 wattor
more. Leadtensionaroundprotrudingmetalsurfacesoredges
mustbeavoided.
6.Criticalcomponentshavingspecialsafetycharacteristicsare
Identifiedwitha AbytheRef.No.Inthepartslistandenclosed
withina brokenline*(whereseveralcriticalcomponentsare
groupedInonearea)alongwiththesafetysymbol
Aontheschematicdiagramsand/orexplodedviews.
Replacementpartswithoutthesamesafetycharacteristics
maycreateshock,fire,orotherhazards.
7.Whenservicinganyunit,alwaysusea separateIsolation
transformerforthechassis.Failuretousea separateisolation
transformermayexposeyoutopossibleshockhazard,and
maycausedamagetoservicinginstruments.
8.Manyelectronicproductsusea polarizedaclinecord(onewide
pinontheplug).Defeatingthissafetyfeaturemaycreatea
potentialhazardtotheservicerandtheuser.Extensioncords
whichdonotIncorporatethepolarizingfeatureshouldn»ver be
used.
FireandShockHazard(Continued)
9,Afterreassemblyoftheunit,alwaysperformanacleakage
testorresistancetestfromthelinecordtoallexposedmetal
partsofthecabinet,Also,checkallmetalcontrolshafts(with
knobsremoved),antennaterminals,handles,screws,etc.to
besuretheunitIssafetooperatewithoutdangerofelectrical
shock,
Brokenline:an
LeakageCurrentColdCheck
1,
Unplugtheaclinecordandconnecta Jumperbetweenthetwo
prongsofthe plug,
Turnonthepowerswitch.
MeasuretheresistancevaluebetweentheJumperedacplug
andallexposedcabinetpartsofthereceiver,suchasscrew
heads,antennas,andcontrolshafts.Whentheexposed
metallicparthasa returnpathtothechassis,thereading
shouldbebetween1 megohmand5.2megohms.Whenthe
exposedmetaldoesnothavea returnpathtothechassis,the
readingmustbeInfinity.Removethejumperfromtheacline
cord.
TO
INSTRUMENTS
EXPOSED
METALPARTS
1500H, 10VV
WATER
PIPE
(EARTH
GROUND)
LeakageCurrentHotCheck
1. Donotuseanisolationtransformerforthistest.Plugthe
completelyreassembledunitdirectlyintotheacoutlet.
2. Connecta 1.5k,10Wresistorparalleledbya 0,15uF.capacitor
betweeneachexposedmetalliccabinetpartanda goodearth
groundsuchasa waterpipe,asshownabove.
3.Useanacvoltmeterwithatleast5000ohms/voltsensitivityto
measurethepotentialacrosstheresistor.
4. Thepotentialatanypointshouldnotexceed0.75volts.A
leakagecurrenttestermaybeusedtomakethistest;leakage
currentmustnotexceed0.5mllllamps.Ifa measurementIs
outsideofthespecifiedlimits,thereIsa possibilityofshock
hazard. Thereceivershouldberepairedandrecheckedbefore
returningIttothecustomer.
5.Repeattheaboveprocedurewiththeacplugreversed.(Note:
AnacadapterIsnecessarywhena polarizedplugIsused.Do
notdefeatthepolarizingfeatureoftheplug.)
PartsReplacement
1. ManyelectricalandmechanicalpartsInPhilipsequipmenthave
specialsafetyrelatedcharacteristics.Thesecharacteristics
areoftennotevidentfromvisualinspectionnorcanthe
protectionaffordedbythemnecessarilybeobtainedbyusing
replacementcomponentsratedforhighervoltage,wattage,
etc.Theuseofa substitutepartwhichdoesnothavethesame
safetycharacteristicsasthePhilipsrecommended
replacementpartshowninthisservicemanualmaycreate
shock,fire,orotherhazards.Undernocircumstancesshould
theoriginaldesignbemodifiedoralteredwithoutwritten
permissionfromPhilips.Philipsassumesnoliability,expressor
implied, arisingoutofanyunauthorizedmodificationofdesign.
Servicerassumesallliability.
2. AllICsandmanyothersemiconductorpartsaresusceptibleto
electrostaticdischarges(ESD).Carelesshandlingduring
repaircanreducethelifeofthepartdrastically.
LASERNOTE:
DANGER- Invisiblelaserradiationwhenopen.AVOIDDIRECTEXPOSURETOBEAM.
CAUTION- Useofcontrolsoradjustmentsorperformanceofproceduresotherthanthosespecifiedhereinmayresultinhazardous
radiationexposure.
CAUTION- TheuseofopticalInstrumentswiththisproductwillIncreaseeyehazard.
CL96532086_023.eps
080999

6.2.2Requirementstoperformthetest
•Workingkeyboardtostartupthetest.
•Workinglocaldisplaytochecktheoutputmessages.
CL96532086-024.eps
090999
Figure6-1
6.2.1Description
Theintentionofthedealerdiagnosticsistogiveanindication
oftheCDRplayerstatus.Aninexperienced,even non-
technicaldealerwill/canperformthetest.Testsareexecuted
automaticallywithoutneedforexternaltoolsordisassemblyof
theunit.ThistestcheckstheCDRmainboardusingthesame
testsastheelectricalservicediagnosticsprogram.Onlythe
resultof the test, "PASSED"or"ERROR",will be shownonthe
display.Pressingkeys[FFWD]and[REWIND]simultaneously
whileswitchingontheunit,startsthetest.Switchingoff the unit
endsthetest.
DiagnosticSoftware
6.DiagnosticSoftware
6.1Dealermode
Thepurposeofthedealermodeistopreventpeopletakingout
theCDinsidetheplayeratexhibitions,showroomsetc..This
modedisablestheopen/closefunctionoftheplayer,
Thedealermodecanbeswitchedonandoffpressingkeys
[OPEN/CLOSE]and[STOP]of the CDRplayersimultaneously
whileswitchingontheunit.Thedealermodeisstoredinthe
flashmemory and canonlybechangedbyexecutingtheabove
actions.
6.2Dealerdiagnostics

CDB775 DiagnosticSoftware
6.3Electricalservicediagnostics
ELECTRICALSERVICEDIAGNOSTICS
(software versions, testfordefectivecomponents)
Figure6-2

DiagnosticSoftware CDR775
6.3.1Description
Theintentionoftheelectricalservicediagnosticsistoshowthe
softwareversionspresentintheplayerandtodirectthedealer
towardsdefectiveinternalunits.Theunitsare: theCDRmain
board, theCDRloader,theCDloader in caseof a CDR775and
thekeyboard/displayboard.A sequenceoftestsisexecuted
automatically.Someofthetestscanbeabortedorskipped
withouttheresultbeingtakenIntoaccount.Externaltoolsor
disassemblyoftheunitisnotnecessarytogetthediagnostic
information.Pressingkeys[PLAY/PAUSE]and[FFWD]
simultaneouslywhileswitchingontheunit,startsthetest.
Switchingofftheunitendsthetest.
6.3.2Requirementstoperformthetest
•Workingkeyboardtostartupthetest.
•Workinglocaldisplaytochecktheoutputmessages.
•A CD-DAdiscwitha minimumof3tracksinalltraysto
performthedisctest.
6.3.3Descriptionofthetests
disctestisexecutedtocheckfocuscontrol,discmotorcontrol,
radialcontrolandjumpgroovescontrol.Thedisctestis
performedbyaudioplay-backof5 secondsatthebeginning,
middleandendofthedisc.
CDR loader test
Duringthetest,thecurrentdisctimeisshown.Incaseofan
errorthemessage "BERR1" willbedisplayedandthe[FFWD]
keymustbepressedtocontinuewiththefollowingtest.
Pressingthe[FFWD]keyalsoabortsthistest.
CDloader test
ForCDR775only.Duringthetest,thecurrentdisctimeis
shown. Incaseofanerrorthemessage"BERR2"willbe
displayedandthe[FFWD]keymustbepressedtocontinue
withthefollowingtest.Pressingthe[FFWD]keyalsoaborts
thistest.
Display test
Allsegmentswillblinkata frequencyof 1 Hz.Pressingthe[F
FWD]keywillstartthenexttestbecausetheuserhastocheck
forhimselfifallsegmentsworkproperly.
Player Information
Inthispartof the testthefollowingImportantInformationcanbe
checkedwithoutremovingthecover:
RecorderID.
•SW-versionbackendofplayer.
SW-versionCDRloader.
•SW-versionCDloader(onlyforCDR775).
CDRmain board test
[FFWD]key.Themessage"DERRn"willbedisplayedwithn
indicatingthefaultytestnumber.
Ifoneofthetestsisabortedwiththe[FFWD]key,noerror
messagewillbedisplayedforthistest.Theflashdataerase
test ("DTST3") cannotbeaborted!
TheCDRmainboardtestconsistsoutof:
DRAM test
Display: "DTST1", TheDRAMusedforbuffermanagementis
testedbywriting,readingandverifyingtestpatterns.
Flash checksum test
Display: "DTST2".Thistestchecksthechecksumofthe
player'sSWstoredintheflash.
Flash data erase
Display: "DTST3".Duringthistest,alltemporaryinformation
(CDtxt)intheflashiserased.
CODEC (ADC/DAC) test
Display: "DTST4".ThistestcheckstheCODECICbywriting,
readingandverifyingtest patterns. Thetestisnotapplicablefor
CDR950.
Keyboard and remote control tests
Thetestwillgivetheusertheabilitytotesteverykeywithout
executingthefunctionassignedto it. Therefore,theuserneeds
topresseverykey on thekeyboardandtheremote control. The
displaywillshowthenameofthekeybeingpressed.Pressing
morethanonekeyatoncewillgiveanunpredictableresult
exceptfor the servicecombinations:[PLAY/PAUSE]+[STOP],
[PLAY/PAUSE]+ [FFWD],[FFWD]+ [REWIND],[ERASE]+
[RECORD],[PLAY/PAUSE]+ [RECORD],[OPEN/CLOSE]+
[PROGRAM].
6.4Mechanicalservicediagnostics
CDR communication test
Display: "DTST5".Thecommunicationbetweenthehost
processor(DASP)andtheCDRloaderviatheDSA-R-busis
tested.
CD communication test
Display: "DTST6").Thecommunicationbetweenthehost
processor(DASP)andtheCDloaderis tested. Thetestisonly
applicableforCDR775.
Loader tests
ThesetestsdetermineiftheCDRloaderandtheCDloaderin
caseofa CDR775workcorrectly.A CD-DAdiscwitha
minimumof3 tracksneedstobeinsertedinbothloaders.A
6.4.1Description
Noexternaltoolsarerequiredtoperformthistest.Thecover
needstoberemovedbecausetheuserhastocheckthe
movementsofthetray,focusandsledgevisually.Pressing
keys[PLAY/PAUSE]and[STOP]simultaneouslywhile
switchingontheunit,startsthe test. Switchingofftheunitends
thetest.Incaseofa CDR775,onecanchecktheCDloader
mechanicsinthesamewaybypressingtheabovekey
combinationontheCDplayerkeys.

BSEMHH IHQ^^HHDiagnosticSoftware
6.4.2Requirementstoperformthetest
•Workingkeyboardtocyclethroughthetestsandtostartup
thetest.
Workinglocaldisplaytochecktheoutputmessages.
6.4.3Descriptionofthetests
Focus control test
Thefocussinglensiscontinuouslymovingupanddown.The
displayreads"BUSY".
Sledge control test
Afterpressing[FFWD]thesledgecontinuouslymovesupand
down. Pressing[REWIND]stopsthesledgeatthepositionitis
inandthefocuscontroltestresumes.Thedisplayreads
"BUSY".
Tray control test
Thisteststartsfromwithinthefocuscontroltestroutine.
Pressing[OPEN/CLOSE]movesthetrayinorout.Inthetray
openpositiononecaninitiatefocusandsledgetestsby
pressing[F FWD]. Onehastostopthesetestspressing
[REWIND]beforeitispossibletoclosethetrayagain.
Dependingontheactionthedisplayreads"OPEN",
"OPENED", "CLOSE"or"BUSY".
6.5DC-eraseservicemode
i.5.1Description
Thistestisinitiatedbypressing[ERASE]and[RECORD]
simultaneouslywhileswitchingontheunit.Theplayerwill
erasea completeCD-RWdisc(includingPMAandATIPlead
outarea)atspeedN=2.Thedisplayshowsthecountdownof
theremainingtimerequiredfortheoperationtocomplete,The
formatis"ERmm:ss",where"mm"aretheremainingminutes
and "ss" theremainingseconds.Aftercompletionthemessage
"PASSED" isshown,andtheplayerhastobeswitchedoffand
onagaintostartupinnormaloperating mode. Switchingoffthe
unitbeforecompletionofthetest,leavesthediscinan
unpredictablestate.Insuchcaseonlya completeDC-erase
procedurecanrecovertheCD-RWdisc.
5.5.2Requirementstoperformthetest
••FunctionalCDRplayer.
*A CD-RWaudiodiscmustbepresentinthetray.
Figure6-4

Faultfindingtrees
7.Faultfindingtrees
CDR775
7.1CDR-Module
Figure7-1

CDR775 Faultfindingtrees
Figure 7-2

Faultfindingtrees CDR775
Figure 7-3