III. CONTROLS. -n r= FIl. VOLI]ME. IV. PRINCIPAL PARTS LOCATION. Fis. 1
Controls. [.lr. "t4 .-l f. r--Eп. lК.' I l9g!) **."" E nn. 6U. Fig.2 Top View ...
SECTION 1
SEFIVICE
MANUAL
TABLE OF CONTENTS
I. II. ÍII. IV. V.
VI.
VII. VIII. IX.
T E C H N I CD AA L T A. . . . DISMANTLIN OG F U N I T. . CONTROLS PRINCIPA P LÁ R T S IOCATIONS V À R A C T OTRU N E RA N D P R E S ETTU N I N G SYSTEM.... l . V A R A C T TOURN E .R. . . . . . . 2. PRESE TT U N I NSGY S T E. M .,. T U N E RA D J U S T M E N T I. F MS E C T I O AN D J U S T M E.N. T . 2 . L WS E C T I OAND J U S T M E N . .T 3 . M WS E C T I OAND J U S T M E .N. T. MAINAMPADJUSTMENT ,... TUNINGCORDTHREADING.. C L A S S I F I C A T IOOFNV A R Í O UP S. CB O A R D. . . . . . . . I. RELATIONOF P,CBOARDTITLE AND IDENT]FICATION NUMBER. 2 . C O M P O S I TO I OFV N A R I O UPS. C B O A R D
.. ........ 2, ., ,..... 4 .......... 5 ............... 5 ............,.,. 6 .............ó ,.-.,..,.,.-,9 ............I0 .,........I0 ,.,.,,..,12 ..........I3 . , . , . , , . , . . . . . . . 14 . , . , . , . . . . . . . . . . I5 .......16 . . , , . , . , . , , , , . , . Ió ...... _........ _17
FoÍ baÍc adjusimênrs,ne.suring nerhoG, 6d operari.g prin.iptes, reter to CENEÍ|ÀL OPERÁTING PRINCIPLESAND ADJUSTMENTS.
DATA
I. TECHNICAL PoWER AMPLIFIER SECTION
CONTINUOUSPOWEROUTPUT 2{HÁNNELSDRIVEN POWER BANDWIDTHOHF)
14 Wattsper chdnel, nininun RMS,at 8 ohms from 40 to 20,000Hzwilh no more thm 0-8%lotal tamonic distoilio.. l5 Hz to40 tHzl8 ohns. dislortion withiÍ 0.8%
PHONO AUX
SIGNAL TO NOISE RATIO OHF)
Les rhán0.8nV al 8 onns
RESIDUÀLNOISE CHÀNNEL SEPÀRATIONíHF) DAMPINC FACTOR
PHONO
Betler rhan50 dB at 1,000Hz More than 30 (l kHz.8 ohmt
SPEAKERS A, B (4 to 16ohmt/Á+B(8 ro 16 ohm9 HEADPHONE
ottrPuT
PRE ÁMPLIFIER SECTION INPUT SENSIÏVITY/IMPEDANCE PHONO AUX TAPE MONITOR
PIN: 150nV/100 k óhns D I N : l 0 n v / 1 8 0k o h m s
OTITPUTI'EVEL/IMPEDANCE TAPE REC PIIONO (RIAA) FREQT'ENCYRESPONSE TUNER/AUX/'TAPEMONITOR TONE CONTROL
PIN:150óV/l00kohns D I N : 1 5 0m v / r 0 0k o h m s 30 Hz lo 15 kgz ll dB l0 Hz lo ?0 kHz +0 dB,
2 dB
BASS TREBLE + 1 0d Ba t 1 0 0H z ,+ 5 d Ba t 1 0k H z (Volumeconbolsetal-30d8 position)
LOT'DNESS CINTROL
FM TUNER SECTTON 8 8 M H z r o 1 0 8M H z
FREQUENCYRANCE
SENSITIVITYOHF) 1 . 5d B
CAPTURERATIO SELECTIVITY (IHF) IMÀGE REJECTION IF RE.'ECTION SPURIOUSREJECTION AM STJPPRESSION SIGNAL TO NOISE RATIO HÁRMONIC DISTORTION
M o r er h a n5 t d B ( 9 8 M H z )
Morethan70 dB (98 MÈz) Móre than ?0 dB (98 MHz)
5 0d B 60dB MONO STEREO
TT'NING INDICATOR STEREOSEPARATION SUBCARRIERSUPPRESSION ANTENNA INPUT IMPEDANCE
Le$ thàn 0,3%i 100%nodtlation) Les ihan 0,6%(1009',modulÁ1ion)
C€nterTuriq metera
F
More than 40 dB (l tHz) 300 ohns balanced,?5 ohmsunbabnced
AM TUNER SECTION FREQUENCYRANGE
5 2 0 k H z 1 01 , 6 0 5k g z 1 5 0k H z t o 3 5 0k H z '
SENSITIVITY (IHF)
200Àrv/n(tEr anl€nna) 20liv (ext.antêntu) 300lrv/h (barantenna) 30llv {ext.antÈnM)
SELECTIVITY OHF) IMAGE REJECTION
MW: More than 30 dB LW: More than 30 tlB More than 55 dB (l MHz) More tho 35 dB (240 ktlz)
IF REJECTION SICNAL TO NOISE RATIO
MW: Moie than 45 dB, Lwr More thd 50dB
SEMI{ONDUCTORS POWERREQUIRDMENTS
T Í a Í n í o r s :2 7 , D i o d e s2: 5 , F E T ! : 2 , C S ÁU , L a . d L A h o d e l s rl 2 0 V , 6 0 H z CEEnodeh: 220V,50 Hz Olhernodels: 110/220l240V, 50/60Hz swilchable 440(w)x l2s(H) x 26s(D)nm (17.3x 4.9x r0.4") 6 . 2k e( l I Tl b t
DIMENSIONS WETGHT
'
Forimprovem€nl purposes,specilicationsand d€sisnare snbj.ct tóchanse{nhost nolic€,
OF UNIT
DISMANTLING
In case of lrouble, e1c. necessilaringdisassembly.pleáse disassemblein the order show. in pholos.aphs.Reassemble
scREws
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III. CONTROLS
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VOLI]ME
Fis.1
IV. PRINCIPAL
PARTS
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Controls
LOCATION
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Fig.2 Top View
Fig.6
Block Dias.am
V,R PC EOARD aÁ-5t57
IC FC EOARD AÁ-5r56
t :
L I I
V
TOUC|ISW|ÍCH PC BOARo ÁA-5r58
t - FiE.7 3) Acrual Operation Fig. 5 is a cÍcuit diagram of the high fr€qu€ncy amplifier stase only of a circuit which is actually used. CondenserCl and varactor diode Dl in the diagram are equivalent to the variable con, denser of an ordinary FM fÍont end. As can be understoodfrom Fig. 3, Dl variesthe capacitance in a 4 to 16 PF ranSeby means oí inversebias voltage. This capacitance and condenser Cl combined caFcitance forÍns the Íesonancecircuit with coil LA. Consequently,it is satisfactory if at low.esonanceíÍ€quency,the voltagesupplied to the varactoÍ diode d€clines,and at hid resonanc€ frequency, the voltage supplied to th€ varactor diod€ increas€s. This voltage variation method with variabl€ resistor, êtc., op€rates in the sam€ way as a regulaÍ variablecordenser.
This method uses a local oscillatorcircuit and frequencymixercircuit,andbiasvoltageis applied to the varactordiode for stariooselectionand is calleda varactortuneÍ. Pleas€ r€ferto the scheÍ,atic diagranfoi actuaicircuitdrawing.
\/.
\'ARACTOR
TUNER AND PRESET
TUNING SYSTEM
I. VARACTOR TUNER A varactortuneris th€ lunersystemin whichvaráctor diodejunctioncapacitance is variedby meansof the inversebias value appliedto the diode for station selection. By employinga varactordiode.tuning which is samea! ordinary vaÍiablecondenseÍs),stem by cán bê mad€without usinga variablecondenser changing controlvoltageonly. l) Features a) When used in an FM tuner, th€ front end can be made small€rthan \{hen compaÍedwith a variablecondenser. b) Station selector butaon positioningis not limited.
c) Slation sel€ctionby remote control is possible. d) Ideal voltagecan be set for a certain reception frequency beforehand, and preset tuning can b€ efect€d by successively switching the e) If control voltsg€ sweep is at ideal speed, automatictuning (seàÍchtuning) is posiblePow€r consumption is about the same as a 0 variablecondenseÍsystem.
Fig. 4
ï f, g
Tuning circuit employinga vaÍactordiode
q
Fig.5
+
ExampleofHigh Frequency AmplifierStageCncuit
INVERSEVOLTÀCE Fig. 3
2) VaÍactorDiodeCharacteristics As foÍ varactordiode characteristics, as shown in Frg. 3, cápacitance c r( changedby chm8ein inverse voltageVR. Further,ifthis varactordiode is usedjn a tuningcircuit,the followingconditions
Cmax + CD Cmin + CD
Cmai, Cmin arc th€ maximum and minimum valuesof varactor diode capacitáncechange. CD is the sum of stray capacitanceand trinmer capacitance. K is overl_5 b€cause FM broadcast frequencyrangeis 88 to t08 MHa Fig.s4(a) and4(b) showthe actualusagemethod.
I
iti!È!
ruMre
\.
t' t ii
i
i
l
t
tri
I
Fig. 8
TO VÀRIABLECAPACITOR
lcr lJPclo09c TERMTNAL@@@@ Fig. 9
2. PRESET TUNING SYSTEM l) PresetStationSelecrion For presetíatio. selection, thereis a mechanical and an eleclricalmerhod. Theseare memory equipme.t and seiection equipment enabling desÍedstations€lectionbeforehand and selecting thes€ pre-setsrationsby simply d€pressing the respective switches. An ordinarycar redio,etc. utilizesa mechanical station selection system wherein mechanical variationis by mea.sof a variablecondenser or posilioningofa dustcorcinsidea coil. Model AA,1010L utilizes an electricalsrálion selectionsystemand employsthe varacrortuner explained in a previousitem. 2) An exampleof a stllion selectionsystememploy" ing a varactortuneris shownin Fig.6. For skrion selection,push switchesare used for s€lecuon of voltagesupplyto the varactortun€r. However, in the AA.10I0L, thesestation selectionpush switchesare puÍe electronicsystemsensi.touch
3) Sensi-touchEmployedPresetStation Selection SystemOperation The circult shownin Fig. 7 is th€ conlrolvoltage genêratinS pres€lvolumeand sensi-touch circuir. Fig. 8 sho'rrsthe insideof circuit sensi-touch IC FPCI009Cwhich includethe 4 channelcircuitry. Terminals14 thÍou8h 17 arethe input teminals; .ermina@ ls , @, @,-a @ arêthestation selectionoutput terminals;and terminalsO , @ , @ , and O arerhepilot outpul terminals. When channêl I sensorelectrodeis louched, voltageis snppliedto the IC as rhe input signal throughfmger(body) resistance at t€rminal @ . Then, the impedanceis loweredat IC station selectoroutput terminal @ and current flows ai shownby the arrowmarksin Fig. 9. Consequenlly, because the supplyvoltage10 the varactor runer diode is changedby the dividingratio of Rb and Rc, station selectionis possibleby m€ansof settingthe pr€setvolumesbeforehand accoÍdrng to the deriÍedbroadcarltÍequen.res.
t VI- TUNER
ADJUSTMENT IIIJLTI FUNCTIOI{ PC BOARDAA-5I59À
o
"@
Ë E@ @ a D@ @.
@.
o. aà. o;
FM IUNING METERÀOJ(LO*ER CORE) FM OISTORTION ÁDJ(I]PPENCONEI
i"t
K-l t:J @.
p"@.@
"op ro rà aà(à @ @@*@oo @ o @ (s) à È
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FREOUENCY ÀOJ
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