Pioneer-SG530-eq-sm电路图 维修手册.pdf

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1、GRAPHIC EOUALIZER siGIIE3c| MODEL SG.53O COMES IN SIX VERSIONS DISTINGUISHED AS FOLLOWS: This service manual is applicable to the KU type. When repairing the R, R/G, WE, WB and WP types, please see page 15. ()rqoNEER ORDER NO. ARP -125,-O 7. P.C.BOARDS CONNECTION DIAGRAM . . . . 9 8. SCHEMATIC DIAGR

2、AM . 11 9. EXPLODED VIEW13 I0.PACKfNG .14 11 FOR R,R/G,WE,WB AND WP TYPES 15 CONTENTS FRONT PANEL FACILITIES SPECIFICATIONS BLOCK DIAGRAM CIRCUIT DESCRIPTIONS . . PARTS LOCATION PARTS LIST . 1. 2. 3. 4. 5. 6. 2 3 3 4 5 7 PICINEEFI ELECTFICINIC GCIFIPCIFIATICIN 4-l , Mesuno 1-chome, Mesuno-ku, Tokyo1

3、53, Japan PICINEEFI ELECTFIONICS UEiAl lNC. 1925 E. Dominguez St., Long Beach, Califonnia 9OAIO U.S.A. PIONEEFI ELECTFIGINIC EtJFIclFE N.V. Luithagen-Haven 9, 2O3O Antwenp, Belgiumi PfONEEFf ELECTFIONICS AIJEITFIALIA FTY. LTE,. 178-184 Eloundany Fload, Elnaeside, Victonia 3195, Austnalia FGO MAY 198

4、2 Printed in JaPan TypeVoltageRemarks KU120V onlyU.S.A. model R1 10V - 1 2OV and 22OV - 240V (Switchable)General export model R/G110V - 120V and 22OV - 24OV (Switchable)U.S. Military model WE220V -240VEurope model WB220V -240VUnited Kingdom model WP220V -240VAustralia model RadioFans.CN 收音机爱 好者资料库 1

5、. FRONT PANEL FACILITIES POWER INDICATOR O powen swrrcH Depress this switch to turn power on to the SG-530. Be- cause this switch is connected to the secondary winding of the power transformer, power is still supplied to the pri- mary winding even when the power switch is returned to the STAND-BY (

6、t ) position. Always unplug the power cord from the wall socket when the SG-530 is not going to be used for a long time. OCTAVE CONTROLS Move these controls above or below the center (zero) posi- tion to boost or attenuate the corresponding frequency bands by up to 110d8 as shown in the figure below

7、. The seven frequency bands are centered at 60H2, 150H2, 400H2, 1kz, 2.4kHz, 6kHz and 1 SkHz. r00 1 k lok FREOUENCY lN (Hz) Octave control variation curves CH l0 8 66 ! 4 w2 (.n zo ?z !+ t 6 6 10 RoaproR/TAPE oN/oFF swtrcH Depress this switch when listening to the tape deck con- nected to the rear p

8、anel TAPE terminals. In the ON posi- tion, only the signal from the TAPE PLAY terminals en- ters the equalizer. In the OFF position, only the signal from the EOUALIZER INPUT terminals enters the equalizer. EoUALIZER SWITCH o Press the right-hand EOUALIZER switch to compensate for the frequency respo

9、nse of the signals entering the EOUALIZER INPUT(E) terminals. The compensated signals are then made available from the EOUALIZER OUTPUT (F*ll terminals as the output signals. o Press both switches when recording signals which have been compensated by the SG-530. The compensated sig- nals are then ma

10、de available from the EOUALIZER OUTPUT (F.;nl lsr.ntinsls and ADAPTOR/TAPE teminals. The same source signals are output at the ADAPTOR/TAPE r terminals as the signals entering the INPUT lE) terminals. When the front panels ADAPTOR/TAPE switch is pushed to the ON position, the signals entering the AD

11、APTOR/TAPE terminals are made available at the OUTPUT (rill) terminals. Use this when connecting a second tape deck or connecting an adaptor component such as a mic mixing amplifier. When a tape deck has been rook connected, the front panels ADAPTOR/TAPE switch func tions as a tape monitor switch. 2

12、 2) OCTAVE CONTROLS il: .- - _- llr:- lElEl : j, r*t I T t- I | (rr*$ t* I l:-l l-l l-l l-l l-l l-l l-l l-:-1 lrl l-l l-l l-l l-ll-l l-: t- ;:E=E=E-E=E=E=E=,=E=E=H=E=E=E=E= = -|-l l-l l-l l-l l- -l l-l l-l l-l l-l l-l l-l l- fnt 6 -t t_t t-t t- l|lL.: _l l_l l_l l_l l_l l-l l=l l_ i_ r-r r-r r-r r-r

13、 r-r r-, ,- - rsr uuuu-u-u-u-Urli-ll-Ll-Url-Li-: I )POWER SWITCH(3) ADAPTOR/TAPE (4)EOUALIZER SWI ON/OFF SWITCH 150H2 4O0Hz 1kz2.4kHz 6kHz RadioFans.CN 收音机爱 好者资料库 2. SPECIFICATIONS Graphic Equalizer Section Equalizer Range (lndividual channel ad.iust) .110d8 60H2, 150H2, 400H2 , ikHz,2.4kHz,6kHz, 15

14、kHz Total Harmonic Distortion (1kHz, All Control; Flat, Output: 1V) 0.005% Gain (Control: Flat) OdB Max. Output Voltage (1kHz, T.H.D.: O.O1Vo, Rg: 50kQ) Frequency Response . . 5Hz- ZOtHz+laA Signal-to-Noise Ratio (lHF A Network, short circuited, 1V Output) . . l00dB Inputlmpedance .SOkohms Output lm

15、pedance No more than 600 ohms 6V Miscellaneous PowerRequirements .AC120V,60H2 PowerConsumption .10W Dimensions . 420(W) x 97(H) x 216(D) mm 16-9/16(W) x 3-13/16(H) x 8-112(D) in. Weight (without package) 2.8k9, 6 lb 3oz Furnished Parts Connectioncordwithpinplugs .2 Operating Instructions 1 NOTE: Spe

16、cifications and the design subject to possibte modification without notice due to improvements. 3. BLOCK DIAGRAM L C H - rN EQUALIZER/REC I E Q I orrtA- f REc R C H r-tr EOUALI ZER L- our t_ RC TAPE L plav gff oru t F n o,N _i- EO REC POWER 6 p S l - 3 S l - 2 S r - r ,lW Lt ! t-t 52 , uil TAPE I EO

17、 REC O N TAPE FOR SLIDE VOLUME KNOB LED NOTE: Push-button switches S1-i, S1-2 and S1-3 are locked independently. -6.5d B- -26.5d8V (at l kHz) -1 0d B- +1 0dB (at l kHz) 40OHz SIGNAL POLE l r H z SI G N AL PO L E 2.4kHz SIGNAL POLE 6kHz SIGNAL POLE l5kHz SIGNAL pOLE R C h o n n e l ( S o m e o s L C

18、h o n n e l ) 5 RadioFans.CN 收音机爱 好者资料库 4. CIRCUIT DESCRIPTIONS GRAPHIC EOUALIZER SECTION A graphic equalizer is a device which divides the audio frequency band into several segments called octaves so that the level of each individual octave can be increased or reduced. The SG-530 divides reproduced

19、 frequencies into 7 octaves with center frequencies of 60H2, 150H2, OOHz, 1kHz, 2.4kHz, 6kHz and 15kHz. The level of each octave can be varied throughout a range of 110 dB, and the left channel and the right channel can be adjusted independently. Further, when the equalizer switch (EQ SW) is ON, the

20、 LEDs built into the level controls (sliding variable resistor knobs) light to allow the fre- quency response of each octave to be determined visually. The equalizer element is an LC series resonance circuit in which the active element is an inductor equivalent. This resonance circuit is connected t

21、o the variable resistor linking the positive and negative input terminals. (See Figure 4-1.) This causes the impedance of the resonance circuit and the resistance of the variable resistor to act as constants for the input circuit and the feedback circuit. Further, buffer amplifiers are located befor

22、e and after the EQ AMP so that the frequency response of the equalizer element are not affected by the impedance of audio equipment connected to the SG-530. Figure 4-1 shows the equivalent circuit for the graphic equalizer section. In the area surrounded by the dotted line, the circuit on the Q1 sid

23、e of point A is equivalent to an inductance and a resistance connected in series. Any required re- sonant frequency can be obtained by changing the inductance and capacitance of the series resonance circuit by varying CI, C2, R3 and R4. With the SG-530, 7 equalizer elements with different resonance

24、frequencies are included in one EQ AMP, and each frequency segment can be adjusted independently. The frequency response of each octave is boosted when the slider of the variable resistor is moved toward the minus input side (the feedback input side) of EQ AMP ICl; conversely, it is reduced when the

25、 slider is moved to the plus side. POWER SUPPLY CIRCU!T As is shown in Figure 4-2, two voltage (+11 V and - 11.5 V) are supplied by the regulated power supply of the graphic equalizer section. The LED set in the knob of each sliding resistor is supplied with stable current by Q23, so the light emitt

26、ed 4 by the LED is steady. Further, the load on Q18 and q2L is light because the LED current is obtained after full wave rectification. Q23 goes ON when the EQ switch is tumed ON to release GND on the base side, and the LED lights when Q23 goes ON. swlTcH sEcTloN o TAPE switch (S1-3) This switch sel

27、ects between a program source or a tape playback (or REC monitor) signal. . EO REC switch (S1-1 and S1-2) Turning this switch on causes an equalized program source signal to be output to the REC terminals. o EO switch (S1-1) This switch determines whether or not a signal is to be equalized; when thi

28、s switch is OFF, the equalizing circuit is by-passed and the input signal is connected directly to the output ter- minals. J Fig.4-1 Graphicequalizer FOR SLIDE VR KNOB LEO t-? t q l ( t a I q l t - t l AC LII EQ AM P nrrenuaie I + l l V Q23 Fig.4-2 Power supply circuit s 2 s I EOUALIZEB -Ea-E-ft- ON

29、 I I O F F Eo,Nl lGil;_l :1,_ lerav 1; l-.-. -. - - J rAPE : | 4. L REc (t- ON I eo n ;Pr-Av- TAPE uaec rPLAYfd-.- . - . - . - . l l TAPF x I - n e c H eo rr I PLaY TAPE L eE. 6. - v 6) eo - out ON I s 3 sr 2 sr I - -l*- eo rru(6- , -li r PLAY(G.l-, TAPE : I -nEc (9. Oeo - out eo rrr r-rr-rv TAPE rn

30、ec 6).o - OUT ON I OFF EouAL rzER I rG) eo t.1 -our * Eo lN6- xl r PLAY(9 .l - IAPE I q REc (gd ON I eo rru ; PLAv TAPE X L REc (9 _n TAPE PLAYBACK ROUTE 5. PARTS LOCATION Front Panel View Front panel ANM.l54 Push knob A (POWER) AAD.417 Slide knob (FREOUENCY AAD483 S1-1 : EOUALIZERIEO REC S1-2: S1-3

31、 : TAPE NO?ES: o The I marh found on some component parts indicatec the importance of the safety factor of the part. Therefore, when replacing, be sure to use parts of identical designation. . For your Parts stoch control, the fut mouing items are indicated with the marhs * and * * GENERALLY MOVES F

32、ASTEN THAN * This classification shall be adjusted by each distributor because it depends on model number, temperature, humidity, etc. Function knob (EOUALIZER, EO RECI AAD24 r+- Front panel base assembly ANM.l55 Function knob A (ADAPTOR/TAPE) AAD456 5 Rear Panel View Terminal (EOUALIZER, TAPE AKB78

33、 Front View with Panel Removed Bonnet case ANE.385 AC power cord ADG.O52 ., AC socket AKPO38 Push switch (S1 , EOUALIZER/EO REC/TAPE) ASG-335 AF assembly GWM-244 LED (Dl3, POWER AEL-382 * I t.,ll.:):,1, * I Push switch (S2, POWER ASG-215 * Slide resistor (VR1-VR7, with LED) ACXOl2 Top View with Bonn

34、et Case RemovqJ A t Power transformer (T1, 120V 4AT-806 I VR assembly AWX.243 Power switch l assembly 6. PARTS LIST NO?ES; o When ordeing resistors, first convert resistance values into code fornt as shown in the following examples. Ex. I When there are 2 effectiue digits (any digit apart from 0), s

35、uch as 560 ohm and 47k ohm (tolerance is shown by J=5%, and K=10% ). 560(-l 56xIOt 561 . RD%PS Em J 47ka 47 x 103 473. . . RD%PS a,u,Fj J 0.5a 0R5 . . RNzH tE6 K rcl 0ro . .Rs/P EEn K Ex. 2 When there are 3 effective digits (such as in high precision metal film resistots). 5.62he, 562 x 10 5621 . .

36、. . RN%SR trBEIl F o The 21 mark found on sotne component parts indicates the importance of the safety factor of the part. Therefore, when replacing, be sure to use parts of identical designation. c For your Parts Stock Control, the fast rnouing items are indicated with the marks * and * * GENERALLY

37、 MOVES FASTER THAN * This classification shall be adjwted by each distibutor because it depends on model number, tetnperature, humidity, etc: Miscellaneous Parts P.C. BOARD ASSEMBLIES Mark Part No. Symbol *=-S$f-* * / ll B U l l c u N a$ rvnc ro-fi.r *-lM-n utu f-*/ rvoelro_ Jl I n,.ffi*-r-otno 1U T

38、yp. No /-_ .,nir* rK vuJ - - 2SC1815 2SC1919 2SD313 2SD880 JAlOl JC501 2*26031A1 2s,A1115lAl a - E1 7. P.C.BOARDS CONNECTION VOLUME AssY (aWX-Z+e) SWITCH Assy 29 24 I DIAGRAM 3l AF Assy l6wM.-Za+) A T t t9 IIII 2 L_3 I 26 27 tt ll , r . , . 17 t8 VOLUME Assy (AWX-Z+g) Ol-O3 can be replaced as follow

39、s. M52181 f.iill: I -l#i,. I :H:,0I , ;8, 654 y (GWM- 244) l*-*.,r-*P: .,.f, rt M R75 3.91 : EQ,rr,tN / i r . : , : ,. l i i : t52i6L . 9 f t r 5 . . sQ11:l . A.!qf,. , ,. , EAiiq!r A O t5/ l+ f,qE R6r ny v lslE PL4Y A o(-v .o l4 r.l*-0_!i H q:-+ + 0 E 2 . . l zL1.ao.t r ., .9+1-_-,.; l 15 USiO35-i

40、)Y0!l,eFq , i . i .it!:.-,-:-!; I Tlolso lH 09 05 07 Qr3 O.r8 Qfi qrs or7 o19 ar4 Qr6 Qrz Q408 uo Q2J Q20 aro + Y #c38 T- 1oo/25 , p T too/25 rl.6l 654 _g+* rti#,.-z+-n o*91 t*-* l-1 lot1 r$, .,3nii .H4.-:rq RrE loo l l . o i - ro qs i .,ii:M/+l Reo loo .,-_ .:.i RrJ 560 + to/5o !|.3ar+.ir . :i.:. .

41、 e r q 2 o : Fl ,ffi7,:19fl5 fI l/l Ro47r . I lorl o-s- lbl l+ rd8 )tl l*l- -*, i.I liJ,:g-; Pl l*l -rr.o -fro l 8l *l. +=-a | R656r . :qi+-.-ilr. .!i|+r-*q repraceo o+ ,. R? ?.2r ., . .:. t+n,+i .,- . ,:.:. -: :. i r. . ai 56Qr . i ,jHHi . .).: i i,riii Ra 560 rtiitiia+w!-,ri G-)+. ;-:, !H R5 5.6 r

42、 or5 9 r, os.ojilf1- StifL/ io3:#:J c Jnl:% HAH R22 tOO tl ci -t . ?1o/5o -T 2zop iia:r .:i.i . . ? + 9 c4 = c2fu. 22Oo | 1Ol5O I *if_ry !ry-!u/-:g Re4 roo _q+-M.9_ -zzuu9 R6,r 3.9r osuJ tC)L .,I -Hlf Q8 HAA e- - ri,9-ili-.e: Rzi ioo R51 471 9C29 H /- ;!o.ors 665 3 e1 K I I + , v t t , , : R 3 7 ? 5

43、 o # *A-ail ,., Rt3 looi) *1 o5l=l o o o o o oo o o o o Q o o o ( PoWER) :l X aeu-cez rtlfr L-J on lD It ll dJ rFl etritiliirai on fb i l i l dJ lJo POWER +ca6 07 T47O/2s o.-.|.i 6 _ o.*.+* : R?3 47t i9i.-+*r-iiil !#i.rr D12:, 9,l.(+;iSrlii .arr R74 151 . R43 a7l c ra- 9.,HAA. . i-oi-ffi: o Y 6 . ,

44、r u o qb H,-i, HA r+ Rt7 ioo UNSWITCHED 1 SCHEMATIC DI I r1 la AGRAM 3 8. A SWITCH Assy -J a f TAPE l r _ R c h lr L E Q L L B I N llsomA E Q I r O U T I lSOnA l L C n _ REC . TAPE L PLAY POWER SWITCH Assy Q r 8 , t 9 2 5 D 3 t 3 Q 2 0 J Ar O t Q1-24 JC5O1 Q 1 A- 2 2 R EG U L AT O R r-:- D :*: J D r

45、 - 4 t o E 2 05,6 KZLt20 0 7 - t z usto3 5 31 ot6 L,z Qztz/?l Dr5, r6 us.to35 D r 4 l o y O t 3 BF D Q 2 3 , 2 4 L E D D R V E R Ir, orr-eo cnr l- - - - -! l_ 65 4 a w x - 2 4 3 NOTE: The indicated semiconductors are representatiue ones only. Other alternative semiconductora may be used and are list

46、ed in the parts list. RESISTCRS: lndlcated in lt.,Lw, .5a/o lolerance unless otherwase noted k : k!2, N, : Mlr. ( F) | 1a/., lcl : !2%, (K) : . 10%,(M) ! 20,/o rotetance 2 CAPACITORS: lndjciled in caDacily (!F)rvoltage (V) untess otherwise noted D : pF Indication wirhour volrage is 50V except etectr

47、olytrc caoacrlor 3. VOLTAGE, CURRENT -E t,otr, votage at i50mv outpur 6kHz) I OC vottage (V) at no rnput srqndl C- mA DC currenr al no nt)ur srgnal 4 O T H E R S r+ Signai roulD ft,e I marl found on some componenl parrs Indicates rhe rm t)onance ot the saierv iaclor of rhp Darr Therelore, when repta

48、crnq, r)e sure to use parts of rdenlrca .les gnat on. Thrs rs rhe l)dsrc sctremat c .tralram. bul the actuat circuir may vary rl!0 to mJ)rovemefts In des qn A F A s s y G W M - 2 4 4 L - - - B q 4 - 1 7 2 S C t 8 l 5 EQUALIZER AI4P _r )LUME Assy awx-243 SWITC H ES S 1 - t : E q g 4 1 ; 2 E * S 1 - r , 2 : E Q R E c 5 1 - 3 : r A P E 5 2 : P O W E R gu - oFF O N - O F F O N - O F F ON _ STAND-BY The underlined indicales rhe switch posrlon. V F I - 7 ; F R E Q U E N C Y A C X - O t 2 65 4 VOLUME Assy EOUAL ZFR AMP BUFFER AMP EeuaLlzER aMp BuFFE