Panasonic SAAK44 - MINI HES W/CD PLAYER User manual

ORDERNO. MD0104069C2
CD StereoSystem
SA-AK44
Colour
(S)... SilverType
Area
(E)... Europe
(EB)... Great Birtain
(EG)... Germanyand Italy
TAPE SECTION:
AR2MECHANISMSERIES
CD SECTION:
RAE0152Z-3 TRAVERSE DECK SERIES
SPECIFICATIONS
Specifications

AMPLIFIERSECTION
Poweroutput
THD 10%
80Hz, both channelsdriven
(LOW) 115 W perchannel (6)
1kHz, both channelsdriven
(High) 45 W perchannel (6)
Total Bi-Amp Power 160W perchannel
Inputsensitivity
AUX 250 mV
InputImpedance
AUX 13 k
FMTUNERSECTION
Frequencyrange 87.50 -108.00 MHz(50 kHz
steps)
Sensitivity 1.8V(IHF)
S/N26 dB 2.2V
Antennaterminal(s) 75 (unbalanced)
AMTUNERSECTION
Frequencyrange 522 -1629 kHz(9kHzsteps)
Sensitivity
S/N20 dB(at999 kHz) 560 V/m
CASSETTEDECK SECTION
Track system 4track, 2channel
Heads
Record/playback Solid permalloyhead
Erasure Doublegap ferritehead
Motor DCservo motor
Recording system ACbias 100 kHz
Erasing system ACerase 100 kHz
Tapespeed 4.8cm/s
Frequencyresponse (+3 dB, -6dBatDECK OUT)
NORMAL (TYPEI) 35 Hz-14 kHz
HIGH(TYPEII) 35 Hz-14 kHz
S/N 50 dB(Aweighted)
Wowand flutter 0.18 %(WRMS)
Fastforward and rewind time Approx. 120 secondswith
C-60 cassettetape
CDSECTION
Sampling frequency 44.1kHz
Decoding 16 bitlinear
Beam source/wavelength Semiconductorlaser/780 nm
Numberofchannels Stereo
Frequencyresponse 20 Hz-20 kHz(+1, -2dB)
Wowand flutter Belowmeasurablelimit
Digital filter 8fs
D/Aconverter MASH(1bitDAC)
GENERAL

Powersupply
ForE&EGonly AC230 V, 50Hz
ForEBonly AC230 -240 V, 50Hz
Powerconsumption 185 W
Powerconsumption in standbymode
0.4W
Dimensions(W xHxD) 250 X332 X316mm
Mass 8.5kg
SYSTEM
SC-AK44(E) MusicCenter:SA-AK44(E)
Speaker:SB-AK44(E)
SC-AK44(EB) MusicCenter:SA-AK44(EB)
Speaker:SB-AK44(E)
SC-AK44(EG) MusicCenter:SA-AK44(EG)
Speaker:SB-AK44(E)
Notes:
1. Specificationsaresubjectto changewithout notice. Mass and
dimensionsareaproximate.
2. Total harmonicdistortion ismeasuredbythedigital spectrum
analyzer.
3. Thelabel “HIGH”and “LOW”on therearof thespeakersreferto High
frequency and Lowfrequency.
1. BeforeRepairand Adjustment
DisconnectACpower, dischargePowerSupplyCapacitorsC531, C532, C533, C534 and C579
through a10 , 5Wresistor toground.
DONOTSHORT-CIRCUITDIRECTLY(withascrewdriverblade, for instance), as thismay destroy
solidstatedevices.
Afterrepairsarecompleted, restorepowergraduallyusing avariac, toavoidovercurrent.
-Currentconsumption at AC230V, 50 HzinNO SIGNALmode
shouldbe~400mA.
2. Protection Circuitry
Theprotection circuitrymay have operatedifeitherofthefollowing conditionsarenoticed:
-Nosound isheardwhenthepoweristurnedon.
-Sound stopsduring aperformance.
Thefunction ofthiscircuitryistopreventcircuitrydamageif, for example, thepositive and
negative speakerconnection wires are

“shorted”, or ifspeakersystemswithanimpedance less thantheindicatedratedimpedance of
theamplifierareused.
Ifthisoccurs, followtheprocedureoutlines below:
1. Turnoff thepower.
2. Determinethecause oftheproblemand correct it.
3. Turnon thepoweronce againafteroneminute.
Note:
Whentheprotection circuitryfunctions, theunitwill notoperateunless thepowerisfirstturned
off and thenon again.
3. Accessories RemoteControl Transmitter
FMindoor antenna(EG)
FMindoor antenna(E, EB)
ACmainslead(E, EG)
ACmainslead(EB)
AMLoop antenna

AntennaPlug Adapror (EBonly)
4. Handling Precautions ForTraverse Deck
Thelaserdiodeinthetraverse deck (optical pickup)may break downduetopotential difference
causedbystaticelectricityofclothes or humanbody.
So, becareful ofelectrostaticbreakdownduring repairofthetraverse deck (optical pickup).
-Handling oftraverse deck (optical pickup)
1. Donotsubject thetraverse deck (optical pickup)tostatic
electricityas itisextremelysensitivetoelectrical shock.
2. Theshortland betweentheNo.4(LD)and No.5(GND)pinson the
flexibleboard(FFC)isshortedwithasolderbuild-up toprevent
damagetothelaserdiode.To connect tothePCboard, besureto
openbyremoving thesolderbuild-up, and finishtheworkquickly.
3. Take carenottoapplyexcessivestress totheflexibleboard(FFC).
4. Donotturnthevariableresistor(laserpoweradjustment). Ithas
alreadybeenadjusted.

-Grounding forelectrostaticbreakdownprevention
1. Humanbodygrounding
Use theanti-staticwrist straptodischargethestaticelectricity
fromyourbody.
2. Worktablegrounding
Putaconductivematerial (sheet) orsteel sheet on thearea where
thetraverse deck (optical pickup)isplaced, and ground thesheet.
Caution :
Thestaticelectricityofyourclothes will notbegroundedthrough
thewrist strap. So, take carenottolet yourclothes touchthe
traverse deck (optical pickup).
Caution whenReplacing theTraverse Deck :
Thetraverse deck has ashortpointshortedwithsoldertoprotect
thelaerdiodeagainst electroststics breakdown. Besuretoremove
thesolderfromtheshortpointbeforemaking connections.

5. Precaution of LaserDiode
Caution :
Thisproduct utilizes alaserdiodewiththeunitturned"ON",
invisiblelaserradiation isemittedfromthepick up lens. /
Wavelength:780 nm/ Maximumoutputradiation powerfrompick
up :100 W/VDE/ Laserradiation frompick up unitissafetylevel,
butbesurethefollowings:
1. Donotdisassembletheoptical pick up unit, since radiation from
exposedlaserdiodeisdangerous.
2. Donotadjust thevariableresistoron thepick up unit. Itwas
alreadyadjusted.
3. Donotlookat thefocuslensusing optical instruments.
4. Recommend nottolookat pick up lensforalong time.
ACHTUNG:
Dieses Produkt enthälteineLaserdiode. ImeingeschaltetenZustand
wirdunsichtbareLaserstrahlung von derLasereinheitabgestrahlt. /
Wellenlänge:780nm/ MaximaleStrahlungsleistung der
Lasereinheit:100 W/VDE/ DieStrahlung anderLasereinheitist
ungefährlich, wenn folgendePunkte beachtet werden:
1. DieLasereinheitnichtzerlegen, dadieStrahlung ander
freigelegtenLaserdiodegefährlichist.
2. DenwerkseitigjustiertenEinstellreglerderLasereinhitnicht
verstellen.
3. NichtmitoptischenInstrumentenindieFokussierlinse blicken.

4. NichtüberlängereZeitindieFokussierlinse blicken.
ADVARSEL:
I dette aapparat anvendes laser.
CAUTION!
THIS PRODUCTUTILIZES ALASER.
USE OFCONTROLS ORADJUSTMENTS ORPERFORMANCE OFPROCEDURES OTHERTHAN
THOSE
SPECIFIEDHEREINMAYRESULTINHAZARDOUS RADIATIONEXPOSURE.
Use ofCaution Labels

6. Caution forACMains Lead
7. Operation Procedures

8. Disassemblyand MainComponent Replacement
Procedures
“ATTENTIONSERVICER”
Somechassiscomponentsmay have sharp edges.
Becareful whendisassembling and servicing.

1. Thissection describes procedures forchecking theoperation of
themajorprintedcircuitboardsand replacing themain
components.
2. Forreassemblyafteroperation checks orreplacement, reverse the
respectiveprocedures.
Special reassemblyprocedures aredescribedonlywhenrequired.
3. Select itemsfromthefollowing index whenchecks orreplacement
arerequired.
Contents
-Disassemblyand assemblymainunit
1. Checking oftheMain, Panel, Deck and PowerP.C.B.
2. Checking ofthePowerP.C.B.
-MainComponentReplacementProcedures
1. ReplacementoftheTraverse Deck.
2. ReplacementofthePowerAmplifierIC.
-Disassemblyand assemblyoftheTraverse Unit
-Disassemblyand assemblyoftheDisc Tray
Warning:
Thisproduct uses alaserdiode. Refertocaution statement
Precaution ofLaserDiode.
ACHTUNG:-
-DieLasereinheitnichtzerlegen.
-DieLasereinheitdarfnurgegeneinevomHertstellerspezifizierte
Einheitausgetauschtwerden.
8.1. DisassemblyProcedureForEachMajorP.C.B. Checking
8.1.1. Checking oftheMain, Transformer, Panel and Deck P.C.B.

Step2Remove thetop cabinet.
Step3Remove theT-bracket.

Step5Turn locating pinon bothsides 90°. (Locating pinneednottobebentback.)
Step6Release thewires CN302, CN303, CN304, CN309 and CN502. Remove rearpanel bypulling
itbackward and lift therearpanel assembly.

Step7Use ahexagonal wrenchand turn clockwise torelease thetray.
Step8Pull theCD tray inthedirection shownabove.

Step9Remove theCD lidinthedirection ofthearrow.
Step11 Release thetwocatches shownabove toremove thefrontcabinetfrom theCD traverse
unit.

Step12 Connectback thewiretoCN302, CN303 and CN304. Use theextension wire(REXX0261)
toconnecttoCN502. Use aFFCwire(REEX0137)toconnectCN1toCN309.
8.1.2. Checking ofthePowerP.C.B.

8.2. MainComponentReplacementProcedures
1. ReplacementoftheTraverse Deck
Step1Followtheprocedures in‘DisassemblyoftheTraverse Unit’ (Step1-Step4)
Step3Desolderthe4legsofthe2motorsand pull outtheServoP.C.B.
Step4Widenthe3bosses withaflatscrewdriverand pull outthe3pins. Thenremove the
Traverse Deck.

Step5Remove theflexiblecableCN 701.
-Removal oftheflexiblecable. Pushthetop oftheconnectorinthe
direction ofthearrow 1, and thenpull outtheflexiblecableinthe
direction ofthearrow 2.
Note:
Insertashortpinintotheflexiblecablefor traverse unit.
-Installation oftheCD servoP.C.B. afterreplacement
Step1ConnecttheFFCboard.
Step2Install theCD servoP.C.B. inthetraverse deck assembly.
Note:

Beforeinstalling theCD servoP.C.B., move theoptical pickup towardstheouteredgefrom the
marking (black triangle). [Otherwise, theresetdetectswitch(S701)mountedon theCD servo
P.C.B. may bedamaged.]
2. ReplacementofthePowerAmplifierIC
Step1Followtheprocedures in‘Checking Procedurefor eachmajor P.C.B.’ (Step1-Step4).
Step2Remove thewires atCN302, CN303 and CN304 and pull outtheMainP.C.B.
Step3Remove 4screwsfixedtothePowerAmplifierIC.
Step4UnsoldertheterminalsofPowerAmpICand replace therespective component.