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MODELSX-1280 COMESIN FOURVERSIONS DTSTINGUISHED FOLLOWS: AS
Typo
Volr.rp
120V only U.S.A. rnodel
R.mark!
KU
KC
120V only 110v, 120v. 22OVand 240V (Switchsble)
Canads model
Gen6ralexDort model
s/G
1'10V,120V,220V.nd 240V {$i,itchsbl6l
U.S.Milit8rymodel
NOTICE: r This service manualis applicable the KU and KC types to . As to the S and S/G types,please referto page 81.
CONTENTS
1. 2, 3. 4. 5. 6. SPECIFTCAT|ONS. CONNECTION DIAGRAM FRONT PANEL FACILITIES L E V E LD T A G R A . . . . M B L O C K I A G R A M. . . D . CIRCUITDESCR]PTIONS 6.1 T u n eS e c t i o n r 6.2 AFSection 6.3 P o w eS u p p l y i r c u i t. r C P r o t e q t i o nr c u i t . . 6.4 Ci DTSASSEMBLY PARTS LOCATION 8.1 F r o nP a n e li e w . . . t V F r o n t i e w i t hP a n eR e m o v e d 8.2 V w l 8.3 T o pV i e w 8.4 Bottom iew V 8.5 Rear Panel View .. . D I A L C O R DS T R I N G I N G 3 5 7 .. ..... . 10 . ...... 11 ..........13 ......14 .....16 .......11 ........ 18
7, 8,
......20 ...........21 .......22 ....29 .. . . .. 24 . . . . .. 25
9.
IO.
ADJUSTMENTS 10.1 FM Tuner 1O.2 AM Tuner PowerAmplifier 10.3 10.4 MeterAmplifier EXPLODED VIEWS ExternalPart . , . 11.1 11,2 lnternal Part PACKING
27 29 30 30 31 33 40 41 45 52 53 54 56 58 61 64 67 70 72 74 77 78
... . .... 82 ,.... 82
11.
12. 13.
SCHEMATIC DIAGRAMS,P.C. BOARD PATTERNS AND PARTSLIST 13.1 Schematic Diagram and Miscellaneous Parts. . (AWE-092) 13.2 TunerAssembly (GWM-I05) 13.3 Microphone JackAssembly (cWS-134) 13.4 Cartridge LoadAssembly (GWS-I33) FunctionSwitchAssembly 13.5 (AWF-031). . . . . 13.6 EO Amplifier Assembly (AWG-0601 13.7 Flat Amplifier Assembly (AWG-059). . . . 13.8 Tone Amplifier Assembly (AWM-119) 13.9 Filter Amplif ier Assembly (AWH.074) 13.10 PowerAmplifier Assembly (AWX-I27) 13.11 Resistor Assembly (AWM-I211 13.12 MeterAmplifier Assembly 13,13 PowerSupplyAssembly {AWR-I57) . . . . 'FuseAssembly (AWX-I261 (AWX-I391 13.14 or (AWM-I23) 13.15 Protection CircuitAssembly
ADDITIONALSERVICEMANUAL 1. 2. 3. 4. S P E C | F | C A T | O. . S .N . CONTRAST F MISCELLANEOUS RTS O PA EXPLODEVIEW . D SCHEMATICDIAGRAMS, P.C.BOARD PATTERNS AND PARTS LIST 4.1 S c h e r n a tDc a g r a m ii
. .. . 84 .. . ..... .......... gs g7
4.2 4.3
A 5 P C o n n e c t o rs s e m b l(y W X - 0 6 2 ) . . A . F u s e s s e m b( y W X - 1 3 4 ) A lA
.......88
NO?E: * .F'nse ossembly(AWX-I26) is applicable to the KII type, and AWX-tB9 is for the KC type.
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1. SPECIFICATIONS
Semiconductors FETS... lCs..... Transistors Diodes.. Power Amplifier Section 5 6 ......61 ......50
Tone Control BASS... TREBLE. . , L l O d B( l 0 0 H z ) m a i nc o n t r o l a 5 d B ( 5 0 H 2 ) u bc o n t r o l s m . r 1 0 d B ( 1 o k H z ) a i nc o n t r o l e5dB (20kHz)subcontrol
power per of Continuous output 185watts. from Hertz 20 min., to channel, at 8 ohms with than total Hertz n0 more 0.03% 20,000 harmonic distortion.
Total HarmonicDistortion(20 Hertz to 20,000Hertz) ContinuousRatedPowerOutput . .No more than 0.03% 90 wattsper channelpower . . N o m o r et h a n0 . 0 1 % o u t p u t ,S o h m s I watt per channel Power . . N o m o r et h a n0 . 0 1 % o u t p u t ,S o h m s ( I n t e r m o d u l a t i o ni s t o r t i o n 5 0 H e r t z :7 , 0 0 0H e r t z= 4 : 1 ) D ContinuousRatedPowerOutput . . No more than 0.01% 90 watts per channelpower No more than 0.006% output, 8 ohms 1 watt per channelpower output,8ohms N o m o r et h a n0 . 0 0 5 % F r e q u e n cR e s p o n s.e. . . . 5 H e r t z t o I O , O O O H e r t z l ! a A y lnput Sensitivity/ pedance lm P O W E R A M P I N. . . . . .. lV/5Okilohms Output SPEAKERS . . . . . A , B , C , A + 8 , B + C ,C + A DampingFactor ( 2 0H e r t z t 2 0 , 0 0 H e r t z , o h m s . . . . . . . . . . . o 8 0 ) 30 H u m a n d N o i s e( l H F , s h o r t - c i r c t e d ,A N e t w o r k ) .. 1 0 5 d 8 ui
) ( ) a t - 4 0 d Bp o s i t i o n . . . . + 6 d B 1 0 0 H 2 +,3 O g ' l 6 k l i . 1 1 H u ma n dN o i s e
( l H F , s h o r t - c i r c u i t eA ,N e t w o r k ) d PHONO . AUX,TAPE PLAY , . . Muting . .
Filter ( LOW... . 15Hz 12dBloct.) HIGH... . 8 k H z( l 2 d B / o c t . ) Loudness Contour (Volumecontrol set
...80d8 . . . 95dB . . -20d8
FM TunerSection
Usable Sensitivity
t \ 4 0 N o. . 50dBQuieting Sensitivity MONO. . STEREO. Ratio Signal-to-Noise (at75dBf). . .STEREO . ( a t6 5 d B f.). . M O N O . . STEREO. (at Distortion 65dBf)
' f 0 0 H zM o N o / S T E R E O ..
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MONO/STEREO lkHz ... O.1o/o10.'157 6kHz I\4ONO/STEREO . ... 0.1YolO.2% F r e q u e n c ye s p o n s. e . . . . . . 3 O H z t o1 5 , O 0 O H z l 3 3 d B R . C a p t u Re t i o r a ..........1.0dB AlternateChannelSelectivity .........80d8 Preamplifier Section S p u r i o u se s p o n R e t i o. . . R sa ........100d8 Input(sens ity/lmpedance) itiv l m a g R e s p o nR a t i o . . e se . ..........90d8 PHONO . I . . . 2 . 5 m V / 5 0 k i l o h m s l F R e s p o n Re t i o . . . sa ....110d8 '100, Cartridge (capacitance) . load 200,300,400pF .. ....55d8 A M S u p p r e s s i oa t i o . . . R n PHONO 2 . . . 2.5mV/5kilohms 0 . . 19.2dBf(5gV) M u t i n gT h r e s h o l d t\4tc.... . . . 7.5mV/5kilohms 0 S t e r e o e p a r a t i o . . . 5 0 d B ( l k H z ) ,3 5 d B ( 3 0 H 2 1 5 k H z ) S n 'l50mV/50 AUX... .. kilohms ...........65d8 SubcarrierProductRatio P T A P E L A Y ' 1. . . . . . 1 5 0 m V / 5 0l o h m s ki SCARejectionRatio... ...........65d8 TAPE LAY2...... P 1 5 0 m V i 5 0l o h m s ki 300 ohms balanced Antenna Input P H O N O v e r l o aL e v e(l 1 k H z ; T . H . D :. 0 3 % ) O d 0 75 ohms unbalanced
PHONOl,2...... 300mV mpedance OutputLevel/l TAPERECl...... ..150mV TAPEREC2...... 150mV PRE UT O ..... 1V/1 ilohms k Distortion TotalHarmonic ( 2 0 H 2o 2 0 , 0 0 0 H 2 , o u t p u t ) . . N o m o r e h a n . 0 1 % t 1V t 0 Response Frequency 0 P H O N O ( R I Ae q u a l i z a t i o n ) .H z o 2 0 , 0 0 0 Hl 2 . 2 d B A 20 t A U X ,T A P EP L A Y . . . 5 H zt o S 0 , O O O H Z I ? d B
AM TunerSection
S e n s i t i v i ( yH F , F e r r i t e a n t e n. n .a ). . . . . . . tl . 300!V/m (lHF, Ext.antenna). . . 15pV Selectivity . . . 30dB S i g n a l - t o - N o iR e t i o . . . . . . . . sa ...50d8 lmageResponse tio .. . . . . . Ra . . . 40dB l F R e s p o n s e R a .t .i .o. . . . . . ......40dB Antenna. .. Built-in Ferrite Loopstick Antenna
Misdellaneous PowerRequirements...... .... 120V 0Hz 6 P o w e r C o n s u m p t i .o n. . 4 3 0 W ( U L ) ,0 0 0 V A ( C S A ) .. 1 ( 11 0 0 W m a x . ) Dimensions . . 5 5 6 ( W ) i 8 6 ( H ) 4 6 1 ( Dm m x x ) 2 1 - 1 / l 6 ( w ) 6 - 1 s l l 6 ( H )1 7 - 5 l 1 6 ( D ) x x in ( W e i g h tW i t h o uP a c k a S e . t . 2 8 . 7 k g6 3 1 b o z ) 3 ( With Package . 3 2 . 1 k g7 0 1 b1 0 o z )
Furnished Parts
F MT - t y pA n t e n n a e O p e r a t i Inngs t r u c l i o n s Hex. Wrench ..........1 ........1 1
*Meacurcd pursudnt to the Federal Trade Commission's Trade Regulation rule on Pouer Output Claifis for Amplifierc. NO?E: Specificotionsdnd the designsubject to possiblemodificotion uithout aotice due to improuements.
HEX. WRENCH
The accessoryhexagonal wrench is provided for removing the TUNING knob and VOLUME knob or tightening their set screws should they become loose. If required, loosen the set screw by inserting the wrench into the hole on the side.of the knob and tuming the wrench counter-clockwise. Be particularly careful not to scratch the front panel when employing the wrench.
2 . C O N N E C T I O ND I A G R A M
T u r n t a b l e2 ( P H O N O 2 ) T u r n t a b l eI ( P H O N O 1 )
C a r t r i d g et y p e player(AUX)
AM outdoor antenna
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300ohm feeder
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Connect the power plug to the wall outlet because this receiver requires lot of a
Tape deck 1 (TAPE 1)
Tape deck 2 (TAPE2}
Dolby*NR adaptor
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S p e a k e rs y s t e m sA ( S P E A K E R SA } Right
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SWITCHED: (50Wmax.)
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Speaker systems B ( S P E A K E R SB }
onm a xi a l 0re UNSWITCHED: (Total lOOW max''
A frequently used component (turntable, tape deck, etc.) can be plugged into this outlet. By leaving the power switch of that component in the ON position, power supply to the component will be coupled with the receiver switch operation. Lessfrequently usedcomponents, which do not require couplec power, can be plugged into either of theseoutlets.
Speaker systems C ( S P E A K E R SC } L e ft Right
*
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"Dolby"
i s a t r a d e m a r k o f D o l b y L a b o r a t o r i e sI n c .
3. FRONT PANEL FACILITIES
POWER SWITCH
F l i p t h i s s w i t c ht o t h e O N p o s i t i o n o s u p p l yp o w e rt o t h e t stereo receiver. There will be a short delay when it i; set to ON, because the muting circuit has beenactuatedto generated suppress unpleasant the noisethat is sometimes when the power is switchedon and off.
POWER ETERS M
These power meters allow you to read out the rated power level when speakers with a nominal impedance of 8 ohms are connectedto the receiver's speaker terminals. NOTE: These ualues are related to the impedance of the speahersand they wry accprding to the frequency. In order to find out the exact output leuel,connect an 8-ohm dummy load insteadof the speahers.
PHONESACK J
Plug the headphones into this jack when you want to listenthroughyour stereoheadphones. Release the all SPEAKERSbuttons if you want to listen to the sound through your headphones only (This means that all three buttonswill be released).
FUNCTIONNDICATOR I M E M O R YM A R K E R S
T h e s ea r e v e r y c o n v e n i e nfto r f r e q u e n tt u n i n g i n t o t h e samebroadcasting station.
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SPEAKERS BUTT
Press the button corresponding the speakers connerrted to ( t o t h e S P E A K E R S e r m i n a l s A , B , C ) o n t h e r e a rp a n e l . t You can presr two of these buttons to listen to sound from two pairsof speaker systems the sametime. at NOTE: No ound utill be heard through the speahers all lhree if buttou arep?esed ot lhe sametime.
M U T I N GS W I T C H
Set this switch to the -20d8 position to attenuatethe a u d i oo u t p u t i n d i c a t e d y t h e V O L U M E c o n t r o lb y 2 0 d 8 . b There is no need to adiust the VOLUME control if you use this switch when turning down the audio output temporarily and when changingover recordsor tapes.
BALANCECONTROL
Use thir control to balancethe volume of the left and right chennels. First, however,set the MODE switch to MONO, and adiust so that the sound appearsto c,)me from somewhere exactly betweenthe two speakers. the ll sound appears be louderon the right, it means to that the v o l u m e f t h e r i g h t c h a n n eils h i g h e r T u r n t h e B A L A I I C E o . control to the left and adiust.Conversely, the sound if appears to be louder on the left, it means that the volume of the left channelis higher.Therefore,turn the BALANCE control to the right and adiust.After adjusting, return the MODE switch to STEREO.
V O L U M EC O N T R O L
Use this control to adlust the output levelto the speakers the and headphones. Turn it clockwiseto increase output level.No sound will be heard if you set it to -. The scale is graduatedin dB which indicate the attenuationwhen t h e m a x i m u mo u t p u t l e v e li s 0 d B .
_TONE SWITCH
S e t t h i s s w i t c h t o O N w h e n a d j u s t i n gt h e B A S S a n d T R E B L E c o n t r o l s . I n t h e O F F p o s i t i o n ,i t c a u s e s h e t amplifierto operatewith a flat frequencyresponse.
FUNCTIONBUTTONS
Pressthe function button which corresponds the proto gram source. Turn the VOLUME control down first before selectinga different function button while the soundfrom one programsourceis beingreproduced. FM. . . . . Press this button for FM broadcasts. T h e F M S T E R E O i n d i c a t o rt i g h t su p w h e n t h e r e c e i v eirs t u n e di n t o a n F M stereo broadcast.The sound is automatically received monophonically d u r i n gF M m o n o p h o n i c r o a d c a s t s . b
Pressthis button for AM broadcasts. P r e s s h i s b u t t o n w h e n l i s t e n i n go a n t t audio component cornected to the A U X i n p u tj a c k s . PHONO 2IMIC. . P r e s s t h i s b u t t o n w h e n p l a y i n g a record on the turntable connectedto the PHONO 2 iacks, or when usinga m i c r o p h o n e h i c h y o u h a v ep l u g g e d w i n t o t h e M I Ci a c k . P H O N1 . . . . . P r e s s t h i s b u t t o n w h e n p l a y i n g a O record on the turntable connectedto t h e P H O N Oi j a c k s .
NOTES: 1. Unplug the microphone from the MIC jach when you do not intend to use the microphone otherwise you will not be able to use the PHONO 2 jachs. 2. Only one function button should be pressed at a time.
A M . .. AUX..
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T W I N B A S SA N D T R E B L EC O N T R
Use these controls to adjust the bass and the treble.
TAPE DUPLICATE SWITCH
Set this switch to ON when you want to duplicateor edit a pre-recordedtape using two tape decks.
T A P EM O N T T O R W T T C H E 1 , 2 ) (S S
Set switch I to ON with a tape deck which is connected to the TAPE 1 jacks (REC and PLAY) when you wanr to monitor the playbackor recordingof a tape.The tape on a deck which is connected the TApE 2 jacks(REC and to PLAY) can be similarlymonitored by settingswitch 2 to
oN.
NOTE: Set these switches to the upper (offl position when Iistening to records or a broadcast.
P l u gy o u r m i c r o p h o n en t o t h i s l a c k . i The microphonesignals are reproduced mono through in the left and right speakers.
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TUNING ETER M
W h e nt u n i n g i n t o a n F M s t a t i o n ,t h e o p t i m u mr e c e p t i o n position is indicatedwhen the metei' pointer deflectsto d e a d c e n t e r .C h e c k t h a t t h e S I G N A L m e t e r p o i n t e rh a s deflected far to the right as possible. as
P H O N O1 C A R T R I D G EL O A D S W I T C H
U s e t h i s k n o b t o s e l e c tt h e i n p u t c a p a c i t a n c ( p F ) i n e accordancewith the sp.ecified load capacitance the of moving magnet(MM) cartridgeconnectedto the PHONO 1 jacks.
SIGNAL ETER M
W h e n t u n i n g i n t o a n A M o r F M s t a t i o n ,t h e o p t i m u m reception position is indicatedby the maximum deflec. tion of the meter pointer to the right.
T U N I N GK N O B
Usethis to tune in to broadcasting stations. Select the station and tune for optimum receptionby observing the SIGNAL meter for AM stationsand both t h e S I G N A La n d T U N I N G m e t e r s o r F M s t a t i o n s . f
FM MULTIPATHBUTTON
U s et h i s s w i t c ht o d e t e c tm u l t i p a t hs o u n dw h e n i n s t a l l i n g t h e F M a n t e n n a n a p o s i t i o nw h i c h y i e l d st h e m i n i m u m i multipath interference.
S T E R E OI N D I C A T O R
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F I L T E RBUTTONS 1 5 H z . When this button is pressed, 12dB/oct attena
uation can be provided for frequencies below l5Hz. This means that you can cancel out noise in the ultra-lowfrequencies which is generated by low-pitched rumble from a turntable and other forms of distortion. Although this noise cannot be heard, it can generateintermodulation distortion. 8kHz . . Pressthis button to providea l2dBloct attenuation at frequencies above8kHz. Set it to this position when you find high-frequency noise, suchas that from scratched records,unpleasant.
MODE SWITCH
Usethis switchfor selecting mono or stereoperformances. STEREO: Set to this positionfor normal stereooperation. MONO: When set to this position, the left and right channel will be mixed and reproduced signals monophonically from both speaker systems.
F M M U T I N GB U T T O N
position). . . Releasethis button to supON (released pressunpleasantinter-station n o i s ew h e n t u n i n g i n t o F M statio s. n po O F F ( d e p r e s s e d s i t i o n ). D e p r e s s h i s .b u t t o n t o p i c k t up weal(stattons.
FM 25psBUTTON
P r e s sh i s b u t t o n w h e n l i s t e n i n go a * D o l b y F M b r o a d t t cast;otherwisekeep this button at the released position.
5. BLOCK DIAGRAM
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, S s: C A R T R I D G E A D( l C O, 2 0 0 , 3 0 C4 0 0) p F LO g 7 : F M M U T I N G ( o n- o f f ) S e : M U L T IP A T H ( o n - o f f t S s : 0 E- E M P H A S I{Sl l r s - 7 5 p s ) : S r o 0 U P L I C A T E( o n- o f f ) S r r: M O N l T 0 R1 ( o n- o f f ) 5 1 2 M O N l T 0 R2 ( o n - g l ! ) : S r s :A D A P T O R t o n - q { l ( S t e r e o- M o n o) Stc:M00E S t s : M U T I N G( - 2 0 d 8 - o f t ) ( : S r e L O U D N E S So n - o r l ) S r r :T 0 N E ( o n - o f f )
6. CIRCUIT DESCRIPTIONS
Refer to the block diagram on page 11 and the schematic on page 43 for the circuit composition of this unit. 6.1 TUNER SECTION AM Tuner The AM tuner employs a 2-gangvariable capacitor, one IC (HA1197) and one AM ceramic filter. Its block diagram is given in Fig. 1. HA1L97 is an IC containing an RF amplifier, converter, 2-stage IF amplifier, detector, and AGC circuit, and features excellent AF frequency response and distortion. Q1 of the output circuit is a special AM muting circuit. This circuit is operated until the AM tuner stabilizes immediately after the FUNCTION AM switch has been set to ON. The instant the AM switch is set to ON, +3 is supplied to Rr, thru Ce, and the base of Q, is forward biased. Consequently, Q, is tumed ON, ancl the AM output signal is shorted to ground during the time constantof Ce, R6. FM Front End The FM front end employs a 4-gang variable capacitor in the tuning circuit, dual gate MOS FETs at the RF amplifier and mixer, and a local osoillator with J-FET buffer. The FM front-end input is 75St unbalanced single-tuned circuit. The RF amplifier is a dual gate MOS FET. An M-coupled double-tuned circuit is inserted between stages. The dual gate FET is an amplifying element suitable for RF circuits, and features extremely stable amplification becauseof its low NF (Noise Figure), high PG (Power Gain) and low feedback capacitance. The mixer is also a dual gate MOS FET. The reception signal is applied to gate 1 and the loeal oscillator signal is applied to gate 2. This circuit Ceromic frlter has low local oscillator signal injection power and the strong reception signal has little effect on the local oscillator. The local oscillator is a modified Clapp circuit. Its output signal is injected into the mixer thru a J-FET buffer. lF Amplifier Four dual element ceramic filters are used as the selection elements,and one IC (TA7302P) containing two differential amplifiers and one FM IF IC (PA3001-4) are used as the amplification elements. The TA7302P compensates for the filter insertion loss, and also limits the amplitude of the l'M signal. The PA3001-A performs IF amplification, amplitude limiting and FM detection. It also drives the TUNING and SIGNAL meters and controls muting. The block diagram of the PA3001-A is given in Fig. 2.
Fig. 2
Block diagramof pA3001-A
FM Multiplex Decoder The FM multiplex decoder is a PLL (PhaseLocked-Loop) MPX IC (PA1001-A). Its block diagram is given in Fig. 3. FUNCTION ( A Ms w i t c)h
HAll97
ANT Mixer
+B
Deleclor A G CA m p
OUT
AGC line
S I G N Am e t e r L Fig.1 Block dragram AM tuner of
13
PA1001-A contains a PLL VCO circuit, doublebalance type differential demodulator with NFB amplifier, and pilot auto-cancel circuit to improve the distortion charact,:ristics, frequency response, and S/N. The nonlinear distortion produced at the demodulator has been improved by adding the NFB amplifier to the double-baiance type differential demodulator. The pilot auto-cancel circuit eliminates carrier leakage (19kHz), without a loss of demodulated signal frequency response. Moreover, since the cancel signal level tracks the input pilot signal level, the rejection ratio does not drop even if the input pilot signal level changes.
The muting circuit electronically grounds the signal circuit when a control voltage of 1.4V or greater has been applied to pin 8 of the PA1002-A. This control voltage is applied from pin 12 of the PA3001-A thru the MUTING switch. A 1.4V DC voltage is generated at pin 72 of. the PA3001-A when de-tuned more than 170kHz and at weak inputs (antenna input conversion SprVor less). 6.2 AF SECTION MIC Input Circuit PHONO 2 is switched over to MIC when the microphone plug is inserted in to the MIC jack. This input circuit is equipped with an inverse RIAA curve designed to counteract the phono equalizer amplifier circuit. PHONO 1 Input CapacitanceSwitching Circuit ( F i g .5 ) The PHONO 1 input circuit includes an input capacitance switching stage which permits the user to select the optimum load capacitance for the phono cartridge being employed. When C is excluded, the input capacitance of the circuit shown in Fig. 5 is 100pF. The capacitance of C may be set to either 0, 100, 200, or 300pF, thereby making the input load capacitance 100, 200, 300, or 400pF.
Co+Co'=100pF
S T E R E i0 d n
F i g .3
B l o c kd i a g r a m f P A 1 0 0 1 - A o
FM Output Amplifier The FM output amp is an IC (PA1002-A). PA1002-A contains an AF amp. mutin g gatecircuit and power ON/OFF muting control circuit. Its block diagram is given in Fig. 4. The AF amp. is a differentially coupled NFB amp. featuring excellent dynamic range, S/N and distortion characteristics. A de-emphasis characteristic is obtained by providing a frequency selection characteristic at the NFB loop of this amp.
Fig. 5 PHONO 1 input capacitance switchingcircuit
F i g .4
B l o c kd i a g r a m f P A 1 0 0 2 - , 4 o
EqualizerAmplifier This is a 3-stage direct-coupled equalizer amplifier with a first-stage differential amplifier and final-stagepure complementary SEPP. The role of the differential amplifier is to amplify the signal, and to stabilize the DC balance of the output neutral point. The bootstrap circuit in the second stage ensures sufficient gain to drive the final stage composed of a pure complementary SEPP circuit for a wide dynamic range and low output impedance. The RIAA equalization curve is produced by an NFB circuit employing LVoerror metal film resistors and 2Voaftor polypropylene capacitors, resulting in a equalization deviation of 10.2d8 (2OHz- 20kHz).
sx-1 eao
Flat Amplifier The first stage of this 2-stage direct-coupled flat amplifier is equipped with a FET for higher input impedance. Ample NFB also permits an lower output impedance. As a result, there is little change in noise level when the VOLUME control resistance is altered, and there is also sufficient power to drive the NFB-type tone control circuits connected to the following stage: NOTE:
Since the input impedance of the NFB tone control circuits is relatiuely low, there will be a certain amount of change when the uariable resistor is rotated.
Filter Circuits The filters employed in this receiver are -12dB/ octave NFB-type active filters. By coupling the emitter-follower to RC passive filters, peaks have been obtained in the region of the cut-off frequencies, thereby sharpening the "knee characteristics" of the RC passivefilters. PowerAmplifier (Fig. 6) The first stage consists of a PNP dual transistor differential amplifier (Qz ) which loads the current mirror circuit (Qs) to obtain high stable gain even in the high frequency range. The predriver stage (Qa) operates with the constant current circuit (Qr ) as the load, amplifying the voltage to the required level. With a 3-stageDarlington connection in the power stage, and a parallel push-pull circuit in the final stage, a power output level of 185W + 185W/89 (20H2- 20kHz, T.H.D. lessthan O.OgVo\ has been obtained. The purpose of Qt is to equalize temperature changesin Qr. By keeping the input basepotential of Qz at a constant 0V, the Qz output neutral point potential will remain steady despite changes in temperature. Since this power amplifier is a DC amplifier, any DC voltages appearing at the Q, input base will be amplified and passed to the output. In order to avoid this, the drop in potential across R1 due to the Qz input base current, is designed to be absorbed by the Qr base current, thereby maintaining the Qu input base potential constant at 0V.
Tone Controls The SX-1280 features two pairs of tone control circuits (twin tone controls), each with a different turnover frequency. The main tone controls are similar to other regular tone controls, while the sub tone controls permit variation of the frequency response at te very high and very low ends. Both main and sub tone controls apply C-B feedback to a single transistor amplifier, with frequency selection provided within the feedback loop, and the frequency responsealtered when these frequencies are changed. All of these circuits may be by-passedby simply putting the TONE switch into the OFF position.
+Br +Bz
Constant current
load
circuit
OUT
To protection circuit Current mirror circuit
F i g .6 P o w e r m p l i f i e r i r c u i t a c
Q,a to Q,, constitutes the power limiter stage. This stage measures the current flowing through the power transistors by means of the voltage produced by the power transistor emitter resistance. If the load impedance drops below 4 ohms, or the output level exceeds 180 watts, Qrc - Qrz are activated, thereby limiting the drive voltage. Qre and Q15 operate for positive half-cycles, and Qre and Qtt for negative half-cycles. D,, Dr, D5, and D6 limit the drive voltage to prevent drive voltages in excess of a fixed level from being applied to the power stage, thereby avoiding clipping in the power stage, and the generation of oscillations. NOTE:
If an excessiuely high driue voltage is applied to the power stage, the Ds and D6 anode peah voltage will exceed the power stage power supply uoltage, thereby activating D5 and D6, and limiting the driue uoltage.
U
J
F F
OUT
I
-
c:=+
z IFig.8
INPUT OTTAGE V
I N P UV 0 L T A G E T
Schematic diagramof logarithmiccompressor
Meter Amplifier (Figs7,8) In order to indicate the 0.01W- 400W range with one meter without range switching, a logarithmic indication type meter must be employed and the input signal must be logarithmically compressed. The meter amplifier circuit is shown in Fig. 7. This circuit consists of a logarithmic compression circuit and a meter drive circuit. The output signal of the power amplifier is applied to the logarithmic compression circuit, and its dynamic range is compressed. The principles of the logarithmic compression circuit are given in Fig. 8. The output voltage of this circuit is the value divided by Rr and Z. The attenuation at low signal input is reduced and the attenuation at large signal input is increased, by using the rise of the diode current-voltage characteristic at Z. The compressed signal is shaped by D5 and applied to Q, of the meter drive circuit. Q, current amplifies the DC voltage from D, to drive the power meter.
6 . 3 P O W E RS U P P L YC I R C U I T The L and R channels in the power stage are both equipped with independent coils, bridge rectifiers, and a pair of 15000pF capacitors for independentsupply of 176V. The class A amplifier circuits (equalizer amp, flat amp, tone control circuit, filter amp, first stage of the power amp, and the pre-driver stage) are supplied with l68V and t32V via a coil, bridge rectifier, and voltage regulator stage independent of the porver stage. The tuner section is supplied with +13.5V via. lamp coils, voltage multiplier rectifier, and voltage regulator stage. SurgeCurrent Suppressor Circuit (Fag. 9) power supply stage in this equipment emThe ploys toroidal transformers of low internal resistance, and 4 high capacitance(150001F) electrolytic capacitors for smoothing purposes. Therefore without any effective countermeasuresi a sudden Iarge surge of cunent would flow once the POWER switch was turned on, resulting in possible damage to fuses, the POWER switch itself. and other components. In order to prevent this, a sur3e current suppressor circuit has been incorporated. When the POWER switch is tumed ON. the AC cunent is applied to T (power transformer) via R, and the micro temp (thermal fuse). The secondary coil output in then rectified by diode D. resulting in capacitor C1 being charged up, and relay Rr. being activated. So until Rr is turned on, the voltage applied to the primary coil of T will be the voltage divided by R, and the T primary coil impedance, which means that the cunent flowing.in when the POWER switch is first turned ON will be very small. The time required for R; to be turned on will depend on the D and C, time constant Micro temp is a protection fuse designed to blow
+S
Fig. 7
Schematic diagramof meter amplifier
16
sx-1 Elacl
upon detection of heat generated in R1 if RL should fail to turn on, or the T secondary coil fail to operate normally.
POWERSwitch Muting The delaying action employed when the POWER switch is turned ON is determined by the time constants of the timing capacitor (C1) and the constant current circuit (g). When the POWER switch is tumed ON, +3 is passedvia (g) to charge up CT. When fully charged, switch (f) wiil tum on, and a base current will flow from circuit (h) to Q3, thereby tuming the relay on. When the POWER switch is turned OFF again, the AC voltage disappears immediately, resulting in switch (e) being turned on by the AC voltage detector (d), thereby discharging CT. Consequently switch (f), Qr, and the relay will all be turned off. Abnormal Power Amplifier Neutral Point Potential The occurrence of any abnormality in the power amplifier neutral point potential will be detected at (a),resultingin switch(e)being turned on. C1 will thus be charged up, and switch(f),Q3, &rd the relay aII turned off. Protection Against Overload If the bridge type detector circuit (Q, ) detects the presence of an overload condition, Q, will be charged on, resulting in a DC voltage being applied to detector (a). Switch (e) will thus tum on, and switch (f), Q., and the relay will all tum off. Abnormal Protector Circuit Power Voltage The power supply voltage level is detected by detectors (b) and (d). If the prescribed level is not attained, switch (e) will turn on, and switch (f), Qr, and the relay all tum off.
Fig. 9 Surgecurrentsuppressor circuit
c 6.4 PROTECTION lRCUlT (Fig.10) The protection circuit featured in this equipment employs an IC (PA3004) recently developed by Pioneer. This IC includes DC voltage detection (a), +B voltage level detection (b), -B voltage level detection (c), AC voltage detection (d), Ct discharge switching (e), relay drive trigger switching (f), and constant current circuitry (g & h). This protection circuit is responsible for muting when the POWER switch is turned ON and OFF, speaker protection in case of an abnormal power amplifier neutral point potential, power amplifier protection in case of overloading, and speaker disconnection in case of protection circuit failure due to abnormal voltage in the power supply to the protection circuit IC.
tBz
SPAEKER terminal
Overload Detector Power amplifier
PA3004
Fig. 10 Protection circuit
17
7. DISASSEMBLY
S
TUNING knob
f
@
VOLUME knob
F i s .1 1
1El
six-1 aBo
Bonnet Cover Remove the bonnet cover by undoing the 4 screwsO - O. Wooden Cover The wooden cover can only be removed after the bonnet cover has been removed. Undo the secondset of 4 screws O- @. Bottom Plate Undo 13 screws(p- (D to remove the bottom plate. Front Panel To remove the front panel, first loosen the hexagonal screws in the VOLUME control and TUNING knobs, and then gently pull them off. All other front panel knobs are pulled off directly. Then undo the screws (D and (D, and the pair of nuts and washers@ and (0. PowerAmplifier and Heat Sinks (Fig. 12) Undo the 4 screws @ - @ to remove the power amplifier and heat sinks.
H eatsi nk
,P*
@q
@
F i s .1 2
8. PARTS LOCATION
8.1 F R O N TP A N E LV I E W
K n o b ( FI L T ER ) AAD.140
Knob (FNI) AAD.I40
K n o bl S P E A K E S ) R AAD,140
K n o b { F M ,A M , A U X , P H O N O2 / M l C . PHONO ) 1 AAD.140 K n o b( T U N I N G ) AAA-047
l F r o n tp a n e a s s e m b l y AN8-554
al
; -"-i
t I
I
I
I
Knob{ M U T I N G ) AAD. 1 3 8 Knob (BASS) AAB-175
I
K n o b( V O L U M ) E AAB-,I74
. K n o b ( B A L A N C E P H O N O1 I C A R T R D G EL O A D } AAB.176 A K n o b ( T A P E , D A P T O R ,M O D E . LOUDNESS) AAD.138
K n o b( T O N ) E AAD.138
K n o b( T R E B L E AAB.175
eo
sx-1 eBo
8.2
F R O N TV I E WW I T H P A N E LR E M O V E D
Dial panel AAG-148
( P U S h W i t C hL O W F I L T E R S
P u s h w i t c h( F U N C T I O N ) s ASG-126 : Doublemeter AAW-075 r- Rotary switch I ] ( C A R T R D G EL O A D ) ASE-001 Tuning shaftassembly AXA.188 j P h o n ea c k ( Ml C ) AKN.O12
L H I G H F I L T E R ,I V I U T I P A T H , FIV] NG} DE.EI\4PHASIS, IV]UTI ASG-127 Dial ponter assembly AAF.065 Powermeter AAW.OSO j P h o n ea c k ( P H O N E S ) AKN-O1O
:
.'owerswitch (POWER) ASK-080 Variable resistor(BASS50Hz) ACW.101 Variable resistor(BASS100H2 ACW-102 Pushswitch (SPEAKE RS) ASG.132 Leverswitch (TONE ASK.144 r z V a r i a b l ee s i s t o(rT R E B L E1 0 k H ) ACW.103
V a r i a b l ee s i s t o(rV O L U M E ) r ACW.I r 6 (EALANCE) Variableresisror ACV-190 Lever switch (LOUDNESS, ODE) M ASK.144 Leverswitch (ADAPTOR,I\4ONITOR) ASK.145 L e v e r w i t c h( D U P L I C A T E ) s ASK.146
resistor Variable ( T R E B L E0 k H z ) 2 ACW.104
TOP VIEW
Electrolyticcapacitor 15o00rr 100V F ACH-O89 Poweramplifier assembly AWH.O74 (For KU type) Powertransformer ATI447 Powertransformer(For KC type)
ATT-460
Poweramplifier assembly AWH.O74
Protection circuit assembly AWM.123 Powersupply assembly AWR.157
T u n e ra s s e m b l y AWE-092
sx-1 zE|O
8.4
BOTTOMVIEW
F u s e1 2 A A EK 3 0 1 Fuse A -2 AEK 103 F u s e s s e m b l( F o r K U t y p e i a y AWX.'I26 F u s e s s e m b l( F o r K C t y p e ) a y AWX.139 '
i use l,.\
F u n c t i o n w i t c h s s e m O- - - " - s a lY GWS-133
AEK.106
F i l t e ra m p l i t i e a s s e m b l y r 'I9 AWM-'I
E O a m p l i ife r a s s e m b l y AWF.O31 F l a ta m p l i ife r a s s e m b l y AWG-O6O
jack assembly M icrophone
cwt\,4,105
T o n ea m p l i ife r a s s e m b l y AWG-059
R E A R P A N E LV I E W
T e r m i n a ( T A P E1 l AKB.O35
T e r m i n a ( T A P E2 ) l AKB-035 T e r m i n a( A D A P T O R ) l AKB.O35
T e r m i n a( I N P U T ) l AKB-038
: f e r m i n a{ S P E A K E R S ) l
AKE-038
Terminal{GN AKE.O31 Terminal(ANTEN AKA.OO4
AC socket AKP.OO5
(P O Terminal RE UT/POWEN) lR AKB.O35
Bar antenna ATB-505
9. DIAL CORD STRINGING
1 . Remove the bonnet cover, wooden cover and front panel as described in the "Disassembly" section on page 18. 2 . Undo the 3 screws(E - @ to remove the blind sash(Fig. 13). 3 . Loosen screw @, and then remove the tuning drum from the tuning capacitor shaft (Fig. 1 ). 4 . Tie one end of the cord to the peg on the inside of the tuning drum (Fig. 14). 5 . With the tuning capacitor blades turned full in, rotate the tuning drum around the variable capacitor shaft so that screw @ is positioned at the apex (i.e. facing straight up). 6 . Lead the cord out through the gap in the tuning drum, make half a turn, and then pass the cord over the pulleVs A, B, and C in that order. Wind the cord 3 times around the tuning shaft and pass it over pulley D; then make 2 windings around the tuning drum, and finally tie it to the spring, making sure there is sufficient tension in the cord (Figs.15, 16). 7. Turn the tuning shaft to check that the drum and cord move smoothly and easily, and then cut off the remaining cord. 8. Turn the tuning shaft right back in the counterclockwise direction (so that the variable capacitor bladesare fully intermeshed). 9. Align the dial pointer with the starter point on the dial scale, and secure it firmly to the cord ( F i g .1 7 ) . 10. Finally apply the locking paint to the cord securing positions (tuning drum projection and spring) and the dial pointer connection.
T u n i n gd r u m
F i s .1 4
^z -t-V-
F i s .1 3
SX-1
EEIO
T u n i n gd r u m
F i s .1 5
ft
F i g .1 6
P6
1 O .A D J U S T M E N T S
10.1 FM TUNER FM Tracking r Confirm that the dial is set to the stari point. r Connect as shown in Fig. 20, and set the FUNCTION switch to "FM" and the MUTING switch to "OFF". 1. Set an FM signal generator to 4O0Hz,70O7o modulation, 100d8 output. 2. Set TCq to near center capacitance, set the FM signal generator and the SX-1280 diat pointer to 90MHz, and adjust Ta for maximum deflection at the signa.lmeter. 3. Under the state of "2" above, adjust the primary (bottom) core of T6 so that the pointer of the tuning meter deflects to the cetner of the scale. 4. Set the FM signal generator output to 9dB, and adjust Tr , T2, Ti for maximum output. 5. Set the FM signal generator and the SX-1280 dial pointer to 106MHz, and adjust TCa for maximum deflection at the signal meter. 6. Set the FM signal generator output to 9dB, and adjust TCr , TC2, TC3 for maximum output. 7. Repeat steps 2-6 until reception at gOMHz and l.06MHz is perfect. At this time, adjust T, for maximum output. 8. Adjust the primary core (bottom) of T6 so that the pointer of the tuning.meter deflects to the centr of the scale in the untuned state (noiseonly). 9. Set the FM signal generator output to 60dB, set the SX-1280 dial pointer to 98MHz, and tune the FM signal generator at the tuning meter. (Pointer of tuning meter deflects to the center of the scale). J-0.Adjust the secondary side (top) of Tu for minimum distortion. 11. Repeat steps 8 -10 until the minimum distortion point does not change. 12. Set the FM signal generator output to 100dB, and adjust VR, for maximum deflection at the signalmetr (Fig. 18). 13. Set the FM signal generator output to 20dB. Set the MUTING switch to ,,ON" and adjust VRl so that the output waveform disappears. MPX Decoder i Connect as shown in Fig. 20, and set the FUNCTION switch to "FM" and the MUTING switch to "OFF". 1. Set the FM signal generator to 98MHz unmodulated, 60dB output. 2. Connect the output of the MPX SG PILOT OUT terminal to the horizontal axis input terminal of an oscilloscope and tuner ass'y terminal 13 to the vertical axis input. 3. Set the SX-1280 dial pointer to 98MHz and adjust the FM signal generator so that the tuning meter deflects to the center of the scale. 4. Adjust VR3 so that a Lissajous pattem is traced (Fig. 19). on the oscilloscope 5. Modulate the MPX SG at L+R (1kHz) to deviate the 67.5 kHz pilot signal (19kHz) 7.lkHz. 6. Adjust T, for minimum L channelor R channel distortion. (However, within 190" of the core adjustmentrange). 7. Make the MPX SG main signal L or R and adjust VRo for best separation. 8. Next, set the MPX SG to 7.5kHz by pilot signal (19kHz). 9. Adjust VR5 for minimum output.
F ig. 18
Meterdetlection
w F i g . 1 9 L i s s a j o u sa v e f o r m
D i s t o r t i o nm e t e r
I' .I
@trq@i
@(@r@ @ @t@J
f@l
@t@)
-
I)
rrrID
-t
l. t-
@)@
300Q dummy
Oscilloscope
M P X s i g n ag e n e r a t o r l 1 0 : 1p r o b
OO|.:*I O O
V E R T . H O R I Z .P I L O TO U T
v rr2
[oJ
.zN
T
rs
VRt
"k6\
@
r.@
g/ s tt o"
H'
E4I
TUNERassembty
Fig.2O
td
six-1 eao
10.2 AM TUNER 1. Connect the AIVI signal generator (AMSG) to the AM ANTENNA terminal via a lkSJ resistor ( F i g .2 1 ) . I Turn the AM function srvitch ON. o . Turn the DUPLICATE switch OFF, and connect an AC voltmeter to either the L or R TAPE 1 REC jack. 4 . Apply a 4O0Hz, 30Vo modulated signal to AMSG, and set the output to 100dB. a . Adjust the tuning dial indicator and AMSG frequency to 600kHz. 6 . Adjust the T7 core to provide maximum reading in the AC voltmeter. 7 . Next readjust the tuning dial indicator and AMSG frequency to 1400kH2. B. Adjust TCu (trimmer) to again provide ma:Oscilloscooe
AC voltmeter
-t
-) rI) r-
anlenna
generator AM signal
-t
Fig.21
Fis.22
29
r--
1 0 . 3 P O W E RA M P L I F I E R Turn VR2 (L and R) fully around in the counterclockwise direction, but set VRr (L and R) to the center positions. Without any load or input signal, tum the POWER switch ON. Since the same configuration is used for both Ieft and right channels of the SX-1280 power amplifier assembly, the following adjustments apply to both channels. ( DC BalanceFig.23) Adjust VR1 so that the potential differnence between terminals No. 14 and ground reads zero volts (to within t20mV). If this level cannot be attained, disconnect the jumper leads A (or reconnect if already disconnected), and then readjust. ldle Current (Fig. 23) Adjust VR2 so that the potential differnece between the plus (+) terminal No. 17, and the minus (-) terminal No. l-1 reads 15mV (or at least in the 10 to 25mV range). The potential difference between + terminal No.18, and - terminal No. 12 should also register about 15mV at this time. After passing a current for about 10 minutes, check these voltage readings again.
1 0 . 4 M E T E RA M P L I F I E R Apply a TkHz signal to the POWER AMP IN terminals (or any other power amplifier input terminals). Adjust the level of this input signal so that the voltage on the output terminals (SPEAKERS) reads3?.95V rms (AC). Then adjust VRr(L) and VR, (R) of the meter amplifier assembly so that the output power meters read 180 watts.
Front panel
Fig.24
L channel
R channel
<=\
- \-\ \
oll
lA VRr No.11 No.1 2 4 No.1 No.7
\\\
4,
:ll
:=
>-\
lpJrj
;<-> ,-<-:=>-
_
VRz
':
-No.7 No.14 No.12 No.11
VRr A
i P o w e ra m p l i f e r F i g .2 3
30
1 1 . E X P L O D E DV I E W S
1 1 . 1 E X T E R N A LP A R T
Screw4
Screw 4X15 ABA.1I3
Screw 3X6 ABA.064
Spacer AEC-258
Spring ABH.O22
Front panel assembly AN8.554
Wrrhcr 9d M4m6 Nut 90
87r{D4
Lcvar knob :nbly --4!
Pushk
AAD-140]
Spring Spacer AEC-316 ABH.O35
AAD.I39
Knob
AAB.I75
Lever knob AAD.138
Screw 3XG ABA.064
Knob AAB.I76,
Knob AAB.174
Lever knob
ivasher AAD-138 9d Nut 9d M45-086 871-004
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5
Partsindicated greentype cannotbe supplied. in Bonnetcover ANE.183
S h i e l dc o v e r
Screw4X8 ABA.O79
Screw 3X ABA-08'l
'ry
,4
Screw 3X8 ABA-081
-_4;:tlqta , irlt;l$
RearPanelBlock Seepage 39 I N T E R N A LP A R T (Seepages 33-38)
4X8 Screw A-012
,4
-- ---]-
@-Foot Y
assembty AEc-178
Screw4x12
ABA.196 rsh k AD-140,: 4X8 ABA.O12
Screw 4X8 ABA-0't2
Foot assembly AEC-178 Screw4x12 ABA.196
4X8 Screw ABA.O12
Foot assembly AEC-178
Foot assembly AEC-178
ABA-196 i
4X8 ABA'012 4.*12
Screw4x12 ABA.196
32
1 1 . 2 I N T E R N A LP A R T (Front) Top SideComponent
Screw 3X8 ABA.186 Screw 3X6 ABA.O48
Powersupply assembly AWR-157
Acrylic board AEC-431 Screw3X8 A- B| A . 1 8 6: : l, r
Lamp socket
AKK.OOs
Mounting plate
Rubberbracket
A E B .1 2 l
Lamp with wires8V, 50mA AEL-072 :
Screw3XG
BA.(X8 Screw 3X6 AB4.064 AAW
I9,r, AAT.O61
Powermeter
Screw3XB ABA.()66
M o u n t r n gp t a t e ( L )
\L.to withwires I 8V ll lndicatorassemblv I .. $L^-g.62lru,,,, ANR-012 Lamp wires S0ml\^_-, with 8V, ".;' AEC AEL-06e EL-06e $ Duble meter Oiat Dial Chaft as $
AAW.O75
AXAT188
i lI I
'i (
N-llnTi
l \ \ l\
;
prate [-ll
t; il F
I
/.q Y)/ r i s:)
Pulley shaft i <' AB,q..l44.*w1"nA d ,Pulley
Dialpanel AAG;148
NJ
@,'rcctor tfr-Screw
pointer Diat "rLo,,
AAF.065
ilRing
3
5. \,
ABA-&
IAAT-066
P l a t e( R) p M o u n t i n g l a t e( R )
w"rrr"lr. I sO
M4s-086 *
I
i
,.
5 NOTE:,
Partsindicatedin greentype cannot be supplied. Screw3X6 ABA.O48 Screw3X6 c i rcu it assembly Tuningdrum AXA-I13
r:}F:'&iit q!;,1i:ijr1t1:_#w'{ r4i. I r li_i.iti itt.!flliiil
M o u n t i n gp l a t e
Tuner assembly AWE.O92
p lounting late
Pulleyshaft ABA.114
pages35-38 See
rmp with wires 8V, 50mA
;'d9:i',"h ", ltE',;'J'
s ,Dialdhaftassembly f
i:
c
a{xeilst
A\f\ ;
I '
Q)/i^_
LPuthy \
I
\F-Screw 3XG ABA-048 tu \, i Screw 3X8 n, 9*- 48A-066
$,'eec-tor
'Pulleyshaft ABA.114 Pulley(small) AEC-256 B l i n ds a s h
A84-066
Strew3X6 A3A-048
I
(Rear) To SideComponent
Screw 3X10 ABA.144
Screw4X6 ABA.128
Screw4X6 ABA.128 Poweramplifie AWH-074 Powertrans:'orn
Alr-447
H e a ts i n k
lnsulatorwafer AEC-430. , ,
Electrolytic capacitor 15,000pF, 100V ACH-089 ,,
Powertransforn ATT.46O
Transistor 2SD746-R
25D746-5) (25D746-O) Screw 4X8 ABA.190
Washer 3d ABE.OOS Resistor assembly AWX.I27
Springwasher3@ ABE-046
nting
Screw 4X6 ABA.128
Transistor 258706-R (258706-S) (258706-0)
pl ate
Screw 3x6 l : ABA.14O
\ ABA-048
6P housing AKX.O18 Contact piece
X
t'
Poweramplifier assembly AWH-074 3P housing/ :
=y_
AKX-015 |
Insulatorwafer AEC430 Screw3xl6 ABA-O3O
Washer 3@ ABE.OOs Spring.washerSs ABE-046
Resistor assembly AWX-127
p Mounting late
Angle Nut M6
ABN-023
sx-1 e2a1
Resistor assembly ABA-O3O parts indicated green in typecannot supplied. be AWX.127 Springwasher3d ABE-046 Transistor Screw3x6 Washer ;258706-R 3d .ABA-140
screw 3x16 NOTE:
ew4X6 Screw 3X 28 A-1 ABA.O48 Poweramplif ier assembl,T
AWH.O74
(For KU Powertrans:'ormer ATT.447 (For KC type) Powertransformer
\
ABE-001 _;1258706-5) r{258706-0)
ATT.46O
3P housing AKX.O15
lnsulator wafer AEC-430
Screw 3x16 ABA.O3O
Screw 3Xl0 ABA-I44
6P housing AKX.O18
Mountingplate H e a ts i n k
AKF-028
Contact piece Resistor
AWX-127
Springwasher
Screw4X6
ABA.l
Screw4X6
ABE.O46
p Mounting fate
4X6 -128
ABA.128
Transistor 25D746-R
G I
rustng 018 t piece 28 -z
4X8 ABA.190
(25D746-O)
ut M6
3E
k
h
I
EQ amplifier assembly AWF.O31 Screw3X6 ABA-048
GWS.134
Screw3X6
{
. f $r
ii
$ Screw 3X6 --._ * ABA.O48
Supporter-
/
G r o u n do l ;
co
T24-CI30 3X
Screw 3X6 ABA.O48 (4P) Ground terfrrinal t
f
I
I
W i r es a d d l e
: :'
!<
Screw 3X6 A8A.064
Washer7d 822-018
Mask
.i.
AED.O18Nut.'9@ 871.004
871-010
Ni:rt9C 871-004
s
IV
Scrbw3)
Panelbase ABN-045 Screw3x6 A8A.064
ABn-04 Washer.,i9 M4s-0?6
I
$
r
f g
:1
2
4
NOTE:.
F l a ta m p l i f i e rassembly Partsindicatedin greentype cannot be supplied.
AWG-060
L i
i,
Tone amplifier assembly AWG.O59
rtridge load assenrbly
ts-134
ffi:Slffi . iwrgi*:Wrtwg*i;dili;Bq*ild6Ahqffi
Functionswitch assembly : GWS-133
3X6 M8 G r o u n dp l , r t e ole co I T24.030 3X6
Terminalstrip AKC-030 re saddle
AEK.l Fuse 2A AEK.103 Screw3X ABA.O48
nd plate
Fuse 12A AEK.3O1
Screw 3X6 ABA
(For KU type) Fuseassembly AWX-126 (For KC type) Fuseassembly AWX.I39 iresaddle
t e r m i n a l( 2 P ) Wire saddle
Ceramiccapacitor
9,o1pl, U-9Y,..(fsr-KU
G
Shieldcover
Ceramic capacitor 0.01pF, 125V(ForKC type) ACG-o14
Cover(For KU type) *AEC-279 iCover (For KC typel IAEC-365
3X6 r_Scrbw ABn'o4tt \ Washer;9d ,e M45-096
' t
Power switch ASK.OSO
4
5
six-1 eElcl
3
Rear PanelComponent
NOTE:
Parts indicated in green type cannot be supplieo. Bar antenna assembly
A
AC powercord ADG.O13
B a ra n t e n n a o l d e r h '\ AXB-012
ATB-505
A
S t r a i nr e l i e J AEC-327
R e a rp a n e l
J u m p e rp l u g AKM-OO4
S c r e w3 X 1 0 ABA.OO3
S t r a i nr e l i e f AEC-327
B
T e r m i n a l( S P E A K E R S )
AKE
-\-d
Washer' ABE-OO5
3X10
ABA-115 Screw X10 3 AB4-082
c
i
T e r m i n a l( T A P E 1 , 2 1 AK8-035
c
AKP.OOS
Termina{ANTENNA) l Terminal (INPUT} AKB-038
AKA-OO4
Balun T22-025
D
Terminal (ADAPTOR} (PREOUT/POWEN} IR AKB-035
D
1?..PACKING
V i n y lb a g , El1-O24
O p e r a t i n gi n s t r u c t i o n s AR8.244
U p p e rp a d ( L ) AHA.181
U p p e rp a d { R AHA-182 FM antenna ADH-OO2 Air cap AHG.O4O Lower pad (L) AHA.183 Vinyl pouch AHG.O27 Lower pad (R AHA.184 Hexagonal wrench ANK.O18
Sheetcover AHG-085
p Inside acking AHC-044
P a c k i n g a s e( F o r K U t y p e ) c AHD.5O7 P a c k i n g a s e( F o r K C t y p e ) c AHD.527
40
six-1 eao
13. SCHEMATIC DIAGRAMS. P.C. BOARD PATTERNS AND PARTS L I S T
1 3 , 1 S C H E M A T I C I A G R A MA N D M I S C E L L A N E O UP A R T S D S Miscellaneaus Parts
NOTE: o Capacitors: pF unlessotherwisenoted p:pF in o .Resisfors: a, tAWunless in otherwisenoted k:kgt,,M:Mst TRANSFORMERS ND COTLS A
Symbol
t l
Symbol
Part No
Description Transistor T r a n si s t o r Transistor Transistor Transistor Transistor
o3 o4 o5 o6
utJ
2SD746-R. or O S 2SD746-R, or O S 2S8706-R. or Q S 2SB706-R, or O S 2S8706-R, or Q S 2S8706-R, or Q S
Part No.
Description Power transformer (For KU typel Power transformer (For KC type) Bar antenna assembly B a l un Choke coil
*
hfe of these transistors (O1 - 08) should have the same value.
T2 T3
Ll
ATT447 ATT46O ATB.505 T22-025
I24-O30
P . C .B O A R D A S S E M B L I E S
Symbol Part No. Description Tuner assembly EO amplifier assembly Function switch assembty Cartridge load assembly Microphone iack assembly Flat ampl ifier assembly Tone ampl ifier assembly Filter amplifier assembly Power ampl if ier assembly Meter ampl ifier assembly Protection assembly Power supply assembly Fuseassembly(For KU type) Fuseassembly(For KC typer Resistor assembly
CAPACITORS
Symbol Part No. Description Electrolytic Electrolytic Electrolytic Electrolytic Ceramic (For KU type) Ceramic {For KC type) 15000 15000 15000 15000 0.01 0.01
AWE-O92 AWFO31
cws-133 cws-134
100v 100v t00v 100v 125V | 25V GWM-105 AWG-060 AWG-059 AWM.I 19 AWH.O74 AWM-121 AWM-123 AWR-157 AWX-126 AWX-139 AWX-127 LAMPS AND FUSES
Symbol Part No.
c1 c2 c3 c4 c5
ACH{99 ACH-O89 ACH-O89 ACH{)89 ACG-003 ACG-014
c6 c7 c8 c9 c10
cl 1 cl2 cl3 OTHERS Symbol
irovr 4oszso Ceramic
cKDYF 4032 50 cKDYF 4032 50 CKDYF 4032fi CKDYF 4032 50 CKDYF 403250 CKDYF 4032 50 CKDYF 4032 50
Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic
0.o4 0.o4 0.04 o.04 o.04 0.o4 0.04 0.o4
50v 50v 50v 50v 50v 50v 50v 50v
Description Lamp (wedge type) Lamp (wedge typel Lamp (yvg69. tyt.l Lamp {wedge type} Lamp with wires Lamp with wires Lamp with wires Lamp with wires Lamp with wires Lamp with wires Fuse Fuse Fuse Fuse
PLl PL2 PI.3 PL4 PL5 PL6 PL7 PL8 PLg PL1O FUl FU2 FU3 FU4
AEL-029 AEL-029 AELO29 AELO29 AEL{69 AEL-O69 AEL{67 AELO67 AELO67 AEL{72 AEK.3Ol AEK.lO3 AEK.1O6 AEK-106
8V 8V 8V 8V 8V 8V 8V 8V 8V 8V
0.3A 0.3A o.3A 0.3A 50mA 50mA 5OmA 5OmA 50mA 50mA 12A 2A 1A 1A
Part No,
Description
Povver switch Lamp socket Carbon film resistor 2.2M
s25 Rl
ASKO8o AKK.OO5 RD%PS725J
SEMICONDUCTORS
Symbol Part No. Description
o1 o2
2SD746-B,S O Transistor or 2SD746-R,S Q Transistor or
External Appearanceof Transistorsand lCs
2SC1400 2SC1906 2SA733ffiB 2s,C1775 zSC1438
2sc188s %-BC 2SAe12 v
;
3SK45
t@o'
Gt
D
TA7302 TA73O2P
t--_lt
Index
/J{+&{e
l 234567
r___y
zsce4sA @*
2SA899A 2SA899 2SC19044 zSC1904 2SA906 2SC1914 2SA904A 2SC869 2SA726 dt>B 2SC1312 2SC1313 2SC1919 258628A 2SD608A
Gi
E
B
2SK55
q_JTD
ftGs
25D712 2S8682
c
E
B
c
PA3001-A HAl197 PA1002-4 2SA979
fFFEc
c
PAlO01-A
2SC1344
ryE
25D746 2S8706
2SC2291
ffi, ffi,
ffi-q LJts D
2SK117
Circuit Diagrams lGs of
HAl197
TA73O2P
42
3
SchematicDiagram
TUx T.{CMETER
RACn$ S$ilTCn AsS
!-''15.cl rurBALAl(E I FT l m o r- 6 LAI{CE
.--ffi+i--:
TUNERASS'/ AWE- 092
--6'dsn:ii-
'
q"iAl3oz
I
t- -, h
GilO
,rjJ
0l 0r
848E2 3. 2Sr
i-.L-
h "j"t-
F--rhw
f: [i
P0we
ilrffis@Tt
r/c
or'r.r 132
,T
Cr
i o' '^F 4'r sl'olrr
o o$-ri Lot Aux
HmcTroN swtrcH Assy Os-133-
tffit
Pn0N0t
fi5Tl t zs,.vl
PHONO ?
RNgtfoit sw-rtclr Ass'7 6ws- tEt- 22+
or25Ct29
r fAFt iiPrAY REC ;"l**ini.lffiCIrr,i:;
rTAPE 2. F
murulER AlrPASsyArrF- 03r
RESISTORS: IN ONT I/4IT:5%MLERANCE UNLESS O T H E R W I S EN f i E D K : X O I T : H O CAPACITORS: iN.DF UNLESS oTHERYt/TSENoTED P:pF dilfr.r, This isttrc Dlsit gglgrat;c b& t,,lc act{.L circuil, ne7 v.r7 due tr inpowrent, in design :i,' i
i.
lTl
, srGNAL 0E ATZorv+Zow ourprlT voLT Eo 0xrrlr i
t:;
l;,: Fr i!
Y : OCVOLTAoE IIO INPUT AT SI6}IAL rA: DCCURRENT N0 lNrur $6NAL AT ( v) : 0C V0LTmEAT 200uv0UTRITPoUER tkilz) (
iI, fn
F. P;I 0:i ir,.
: suflTcHES -Q! OFF Sr Ftl S1 Ail EEE- 0N OFF Ol \ AUr oFF-0N ?xtc E PHoilo ss PfioNo| !EE-0N q URTRIOGE L0AO(PF) !01!-oo- 3oo 4oo 0N- OFF Sr Fn nUTlN0 Sr nurTrPATH -QEE-0N Sl 0E-EtlPttASlS ?5rS- 25,llS
I
sr Srr Srr Sn $1 Sr Sr Sn s6 s:r ilJPLTCATE -E -Oll roNtToR r 9!!- 0N n0NlT0R 2 SE- ff'l gEl- St A0APTDR t100E $@:H0ll0 tlUTlNG 9!!: t90dB L0IJOI{E}S OFF- 0N -Ot ToNE @ (0rrurl OFF 9f.t fir6H FILTER (SHr) OFF B{ rcl{ FTLTER
S:o REI.AY Jll SPEA(ERA S22 SPFAKERB Sa SPEAKERc Sr+ REI.AY Srs POUJER OFF -OI.i gEE -oN -0N 9!E CFF - ON
I
io
iir
i:',, "i.t;
2
3
s)(-1 eBo
4
5
6
NOTE; The irrdicatedsemiconductors representative are ones o n l y . O t h e r alternative may be usedand are listedin the parts semiconductors
list.
Ass'/ ows -133-y\ Rt$n$ s$rrTCH
PR0TECTIoN ASsr/ Afvlr- tzt-'yJ
,,i' t'
mR CAMOAiod.l0NLY P0WER.r,S.,PPLY CIRCUil
POWER SUPPLY Ass'y AwR-tSl -2/z'
lf3s'sTF-E331Ei
irw'imr-l
L++.ql.#k##,*
-nil ;.-8,*
prr$y' Rr/ hr\P R1$2 Pt-r\9 wsonArs AUI Pllofio PHofio An F.lt 2 I SUPPLY AsS'7 AwR- lsl - r/2 ii'P0WER
t ;l?:ll F.;,FI*I]
HEAoftofles
i'$g4ill
sP&lrl Lcjl ilETER POU'ER
illfi*!3i'',s,1&r#j
FTLTER AHP As+/fllr-tb-i!-.I .:-
RE|: L npe
4
5
6
44
13.2 TUNER ASSEMBLY(AWE-092)
AWM-199, No.25
PLro
A W R - l 5 7 ,N o . 1 6
STEREO IND.
Foil side
AWM-I19, No.21 AYiIM-1 No.20 19, AWM-I19,No.14
AWM-I 19, No.26 AWM-I19, No.15 AWM-119. No.24 AWM-I 19, No.23 AWR-l57, No.19 GW9133, No.32 G W 9 1 3 3 ,N o . 1 1AWM-I19, No.l2 TUNING meter
GWS-I33, No.15
--------------*ws-
133, No.13
1 3 3 ,N o . 1 6 1 3 3 ,N o . 1 7 75s}
UN AA LANCE
300r)
BALANCE
r-------r
BLU
t--____J
133, No.9 A W R - I 5 7 ,N o . 1 7 133, No.33 GWS-I33, No.10 133, No.7
rter BAR ANTENNA
No.6 G$tS-133,
2
3
gr
3SK45
(L N
i' oz : 35K45
T2 T3
arl 2.6 o lJr
O
3 n.cv
I tl
,rt#lE"1a#ivlA *jli"*"i;:; :4q 1-' 4,*j (L @
:r-
rll
FM ANI
I ll I tl
'
, o G 6
GND 1
Y a l ? f t / 6 E
si*,
v
Lt 7.2ua
Rtr
F E+ B n ]311v
o r2 5 C 1 9 0 q s 2 5 K 5 5 6
tZ' (tlzr F
Csl33)? T1 t t l l
1 l
2
15
3 4 5 a aH A l l 9 7
t4 t3 t2
i'
u i.
{i
t.
!" 1t 5
t0K
G
:
(9
ir
F
'(Jo
sB
FU OUT
I
o'i*f; r r*, f* l
ouT s
A l t s . l t ET
2
3
SX-1
EElcl
TO +B F ExcEPT I
;, i
-t
I
crTA7302P
o
I
(,
28FU T.IIET
t1
C;l':,rt+e. ,lfltr-r*#{tl,::
lE !
-5r
8 . 2K
t o
21 FII T. HET
1
Rtr
?
15
3
14
4
t3 r:
5
t2 il
5
t0
?
9
8
a sP A 3 0 0 l - A
16
z :9
6
t20(
N
a!
ci
+?'
26 TULTI PATH
l o t l U T. A U T 0 0 U T 25 FMS MET
n|rffi**ffi{1irFl|ih t
!
ffi1l t-.
l
l i!
:
t 1'
i
i;
'i
Ii S T E R E Ol D
410
10, Fl .11 r6
o { e
l l ?
=
:< o ai @ G
14 AUTo ltl
y,l
2 15
3 t4
4 13
5 t2
6' tr
? l0
8 I
t 16
2 15
3
i:
16
0 r P A1 0 0 2 - A
o sP A l 0 0 l - A
t3 tZ ll
4
5
S
!
",
r? N
1
8 3
14
ilo
+
Rgr
(o - ( o ; a
ts'i
2X 23 DE-ET
+8
IE D E -E T
I
FT 0uT
T U T I rf
ir: !_. i: t\
$
:i
=
L o N @
_ B
r rt
G
;
I
l
vco vco
K I L L E RT . P
PartsList of Tuner Assembly(AWE-0921
T R A N S F O R M E RC O I L S A N D F I L T E R S ,
Symbol Part No. Dercription FM FM FM FM FM antenna coil RF coil RF coil RF coil matching coil Symbol Part No. Description
T1 T2 T3 T4 T5 T6 T7
F1 F2 F3 F4 F5 F6 F7
ATCO2l ATC{15 ATCO16 ATCO57 ATE{39 ATEO3O AT8013 ATFOl8 ATFO18 ATFOl8 ATF{18 ATF.O47 ATFO38 ATF{34 T21A2A T24.28 ATHO14 T24{28 T24{.28
czs
c26 c27 c28 c29 c30 c31 c32 c33 c34 c35 c36 c37 c38 c39 g0 c41 c42
c21 c22 c23 c24
cKDYF403250 ccDSL121 50 K CKDBC 473225 CKDBC 473225 CKDYF 403250 ccDsL 330K50 czA oBlM 35 CEAR47P 50 cKDBC47322s CKDYF4032 50 cKoYF 403250 cEA 010P50 cKDYF 103250 cKoYF 403250 cszA 100M16 0EAZ,21P 16 cEA 010P 50 cszA 010M25 CSZA OlOM 25 cszA 6R8M6 cosH 511J50 cszA 3R3M16 cszA 3R3M16 cszA R56K35 cszA R56K35
Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Electrolytic Electrolytic Ceramic Ceramic Ceramic Electrolytic Ceramic Ceramic Electrolytic Electrolytic Electrolytic Electrolytic Electrolytic Electrolytic Polystyrene Electrolytic Elctrolytic Electrolytic Electrolytic
o.04 120p 0.047 o.o47 0.o4 33p o.1 o.47 0.o47 o.04 0.04
1
50v 50v 25V 25V 50v 50v 35V 50v 25V 50v 50v 50v 50v 50v 16V
r6V 50v 2sv 25V 6V sOV 16V 16V 35V 35V 10V 10V SOV 16V 50v
FM detector transformer AM OSC coil FM ceramic filter FM ceramic filter FM ceramic filter FM ceramic filter Low pass filter 455kHz filter AM ceramic filter RF choke coil R F choke coil Micro inductor RF choke coil RF choke coil
0.01 0.o4 10
220 1 1 1 6.8 51Op 3.3 3.3 0.56 0.55 47 47 820p 10 0.o1
L1 L2 L3 L4 L5
CAPACITORS *mbol Prn ilo. ACK{22 ACM06 ccDTH 150K50 ccDsL 10tK 50 cKoYF to3z 50 ccDsL o20c 50 CKDYFtO3Z50 GKDYFtO3Z50 @DTH I@K 50 CCDTHISOKEO ccosL r6(x 50 @DSL lq)F 60 CKDYEtO3K60 ccDsL rotK 80 CKDYBI(BK 50 ccDLH 430K 50 ccDcH (BoF 50
Dcrcription Variablecapacitor ceramic trimmer Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic
u3
c44 c45
c46
vc
TU c1 c2 c3
u
c5 c6 c7 c8 c9 cr0 cl1 c12 cl3 c14 cl5 cr6 cl7 cl8 c19 c20
15p 1OOp 0.01 2p 0.01 o.o1 18p 18p 15p 10p O,O1 1oop 0.01 43p 8p 33p 15p lmop o.o4 3300p
50v 50v 50v 50v 50v 50v 50v 50v 50v 50v 50v 50v 50v 50v 50v 50v 50v 50v 50v 50v
u7 c48 c49 c50 c51 c52 c53 c54 c55 c56 c57 c58 c59 c60 c61 c62 c63 064 c65
cEA 470P10 Elctrolytic cEA 470P10 Electrolytic Polystyrene cosA 821G50 cszA 100M16 Electrolytic CKDYF10325() Ceramic cKDYF lt()3250 Ceramic cosA 331J50 Polystyrene cKDYF 103250 Ceramic ccDsL 080F50 Ceramic CKDYFtO3Z50 Ceramic CKDYF SZN N Ceramic CKDYF103250 Ceramic CKDYB 1O2K C) Ceramic oKDYF4032 50 Ceramic cKoYB 821 50 Ceramic K CEA3R3P 50 CEA4R7P 35 CKDYB122K50 coMA 333J50 coMA 683J50
0.04 33Op 0.01 8p 0.01 0I)4 o.ol IOOOp 0.o4 820p 3.3 4.7 12fi)p 0.033 0.068
50v 50v 50v 50v 50v 50v 50v 50v 50v 50v 50v 35V 50v 50v 50v
-
ccDcH 330K50 Ceramic ccDcH 150K50 Ceramic CKDYB TO2K 50 Ceramic CKDYF4032 50 Cerarnic CKDYA332J50 Ceramic
Electrolytic Electrolytic Ceramic Mylar Mylar
49
Symbol
Part No.
Descriotion
Symbol
Part No.
Oscription
c66 c67 c68 c69
crc
c71 c72 c73 c74 c75 c76 c77 c78 c79 c80 c81
CKDYF4O3Z50 cEA 100P 16 ccDsL 151 50 K ccDsL 151K50 cszA 4R7M16 C K D Y B 2 1 K5 0 8 CKDYB 56TK50 cszA 100M16 cosA 821J50 CKDYB 561K 50 cszA 4R7M16 CKDYB 821K50 cEA221P 6 1 cEA 330P 16 coMA 473K50 cEA 101P 6 1 CKDYF4032fi cEA101P6
Ceramic Electrolytic Ceramic Ceramic Electrolvtic
Ceramic Ceramic Electrolytic Polystyrene Ceramic Electrolytic Ceramic Electrolytic
0,04 10 150p 15Op 4,7 820p 560p 10 820p 56Op 4.7 820p 220 33 O.O47 1O0 O.04 10O
50v 16V 50v 50v 16V
50v 50v 16V 50v 50v 16V 50v 16V 16V 50v 16V 50v 6V
R16 R17 R18 R19 R20 R21 R2, R23 R24 R25 R26 R27 R28 R29 R30 R31 R32 R33 R34 R35 R36 R37 R38 R39 R40 R4t R42 R43 R44 R45 R46 R47 R48 R49 R50 R51 R52 R53 R54 R55 R56 R57 R58 R59 R60
RD7.PS331J RD'/.VS56OJ RDY.VS56OJ RDY.VS 1O2J RDTTPS 331J RD7.PS 3O4J RD/rPS331J RDTTPS 621J RD%PS 21J 6 RO%PS 822J RDTTPS 1J 51 RD%PS 242J RDI/rPS 163J RD%PSZ22J RD%PS 1O2J RD%PS &22J RD%PS 51J 1 RDTTPS 332J RD/rPS332J RD7.PS 152J RD%PS 152J RD%PS 61J 1 RD7.PS822J RDY4PS 182J RDTTPS 104J RDTTPS 473J RNl/5SO 1502F RDy.VS 1OsJ RDy.PS1O4J RDy.PS 751J RD%PS 332J RDY.PS 332J RDY.PS471J RDY4PS 471J RD%PS3O3J RD%PS3O3J RDY4PS 1O4J RD%PS222J RDY.PS 1O4J RD%PS3O3J RDy.PS3O3J RO%PS722J RDY.PS222J RD7.PS?52J RDY.PS822J
Carbonfilm Carbon film Carbon film Carbonfilm Carbonfilm Carbonfilm Carbonfilm Carbonfilm Carbon film Carbonfilm Carbonfilm Carbonfilm Carbonfilm Carbonfilm Carbonfilm Carbonfilm Garbonf ilm Carbonfilm Carbonfilm Carbonfilm Carbonfilm Carbonfilm Carbonfilm Carbonfilm Carbonfilm Carbonfilm Metal film Carbonfilm Carbonfilm Carbon film Carbonfilm Carbonfilm Garbonfilm Carbon film Carbonfilm Carbonfilm Carbonfilm Carbon film Carbon film Carbonfilm Carbonfilm Carbon film Carbon film Carbon film Carbon film
330 56 56 lk 330 30Ok 330 620 620 8.2k 510 2.4k 16k 2.2k 1k A.2k 150 3.3k 3.3k 1.5k 1.5k 160 8.2k
Electrotytic Myfar Electrolytic Ceramic Electrolytic
c&.
c83
RESISTORS Symbol
VR1 VR2 VR3 vR4 VR5 R1 H2 R3 B4 R5 R6 R7 R8 R9 R10 Rtl R12 Rt3 R14 R15
yrW
Part No.
@247 @2{)48 c92051 ACPO57 ACPO56 RD7.PS1OsJ RDY.VS182J RDZTPS 562J RDI/.VS 270J RD7.VSI5IJ RD%VSz4J RDTTPS 123J ROy.PS 151J RD%PS22OJ RDz.PS 121J RDTTVS 103J RD%VS 472J RDY.PS 1O2J RD%PS 21J 1 RDy.PS1O1J
Da.craption Semi fixed Semi fixed Semi fixed Semi fixed Semi fixed Carbon film Carbonfilm Carbon film Carbonfilm Carbon film Carbon film Carbonfilm Carbonfilm Carbon film Carbonfilm Carbonfilm Carbonfllm Carbonfilm Carbon film Carbon film 100k 47k 4.7k 150k 22k 1M 1.8k 5.6k 27 150 220k 12k 150 22 120 10k 4.7k tk 120 100
1.8k t00k 47k 15k 1M 100k 750 3.3k 3.3k 470 470 30k 30k 100k 2.2k 100k 30k 30k 22k 2.2k 7.5k 8.2k 1/5ir'
50
six-1 eao
L i s t o f c h a n g e dp a r t s i n f o r m a t i o n w i l l b e f u r n i s h e dw h e n ever necessary and you are requested to amend parts n u m b e r i n t h i s p a r t sl i s t .
Symbol Part No, RD%PS 752J R D l z a P S5 1 J 1 RD%PS 562J R D 7 4 P S1 5 2 J R D % P S2 O 1 J R D / 1 P S1 8 1 J RD/4PS 1O3J R D Z a P S1 0 3 J RDY PS 221J R D Y 4 P S1 O 2 J RD74VS 56OJ RD%VS 56OJ Description Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film
List of ChangedPartsfor Factory Modification
7.5k r50
5.bK l.3K
R61 R62 R63 R64 R65 R66 R67 R68 R69 R70 R71
fr tz
200
18O 10k 10k 22O 1k 56 56
SEMICONDUCTORS
Symbol Part No. Description
o1 02 o3 o4
Ll5
3SK45-B 3SK45.B 2SC1906 TA 73O2P PA3001-A PA1001-A PA1002-A HAl197 25K55.D 152473
FET
rE I
Transistor
tc tc
o6
Q7
o8 o9 D1
rtr | Diode
5'1
.I3.3
MICROPHONE JACK ASSEMBLY(GWM-105}
GWS-133, No.20
c6 o.04
GWS-I33, No.31
a c,o.oa
,v
GW$133,No.A GWSI33, No.B GWS-133. No.C
Tc, 7n.
7, '//,
PHONO
PHONO 1
GWS-1 No.29 33.
AUX
PartsList
CAPACITORS
Symbol PErt No. De*ription
c7
Rrs 33K
l o
c8
2100P 180l( Rn
CKDYA 472J 50 (COMA472Jnl CKDYA 272J W (COMA272J Wl
Ceramic (Mylarl Ceramic (Mylar)
47OOp (4700p 27oop l27OOo
sOV SOVl 50v sOV)
c?
s60 K
RESISTORS
Symbol Part No. D$cription
R44
2 PHONO 146
R17 R18 R19 R2O R21
RD%PS 84J 1 RD%PS 84J 1 RD16PS 393J RD%PS564J RD%PS564J
Carbonfilm Cadronfilm Carbonfilm Carbonfilm Carbonfilm
180k 18Ok 39k 560k 560k
OTHER
Symbol Part No.
Description
Phone Jack (MlC)
AKNO12
52
six-1 aBo
13.4 CARTRIDGELOAD ASSEMBLY(GWS-134)
GW9133,No.F GWS-I33, No.E GWS-133, No.D
Foil side
CAPACITORS
Cr P 100
Symbol
Part No.
Dercription Polystyrene Polystyrene Polystyrene Polystyrene Polystyrene Polystyrene 1OOp 10Op 2fi)p 20Op 3fi)p 30Op
C3zqo,r
Cs3W
c1 c2 c3 c4 c5 c6
50 cosH 101J cosH 101J 50 cosH 201J50 cosH 201J50 cosH 301J50 cosH 301J50
50v 50v 50v 50v 50v 50v
RESISTORS
Symbol Part No. RDY.PS 1O1J R D T I P S1 0 1 J RD!/rPS 1O5J RDT.PS 105J RD'ZIPS 105J RD/rPS 105J RD%PS 1OsJ RD%PS 1O5J Do$ription Carbon film Carbon film Carbon film Carbon film Carbon Carbon Carbon Carbon film film film film 100 1O0 lM 1M lM lM lM lM
PartsList s:UvtTcH
Symbol Part No. Delcription Rotary switch (CARTRIDGE LOAD}
R1 R2 R9 R10 R11 R12 R13 R14
s2
ASE401
13.5 FUNCTIONSWITCHASSEMBLY(GWS-133}
AW