GRAPHIC EOUALIZER siGIIE'3c| 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 DIAGRAM .. 11 9. EXPLODED VIEW 1 3 I 0 . P A C K f N G . . . . . . 1 4 1 1 F O R R , R / G , W E , W B A N D W P T Y P E S 1 5 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, Tokyo'153, 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 1982 Printed in JaPan Type Voltage Remarks K U 120V only U.S.A. model R 1 10V - 1 2OV and 22OV - 240V (Switchable) General export model R/G 110V - 120V and 22OV - 24OV (Switchable) U.S. Military model WE 220V -240V Europe model WB 220V -240V United Kingdom model WP 220V -240V Australia model www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 1. 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 ( 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. The seven frequency bands are centered at 60H2, 150H2, 400H2, 1k{z, 2.4kHz, 6kHz and 1 SkHz. r0 0 1 k lok FREOUENCY lN (Hz) Octave control variation curves C H l 0 8 6 6 ! 4 w 2 (.n z o ?z !'+ t 6 6 1 0 @ RoaproR/TAPE oN/oFF swtrcH Depress this switch when listening to the tape deck con- nected to the rear panel 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 response 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 made 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 panel's ADAPTOR/TAPE switch is pushed to the ON position, the signals entering the ADAPTOR/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 panel's ADAPTOR/TAPE switch func tions as a tape monitor switch. 2 2) OCTAVE CONTROLS il: . - - _ - - - - l l r : : : - 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 l r l l - l l - l l - l l - l l - 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 r-r r-, ,- - rsr uuuu-u-u-u-'"-Urli-ll-Ll-Url-Li-': I )POWER SWITCH (3) ADAPTOR/TAPE ( 4 ) E O U A L I Z E R S W I ON/OFF SWITCH 150H2 4O0Hz 1k{z2.4kHz 6kHz www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 2. SPECIFICATIONS Graphic Equalizer Section E q u a lize r Ra n ge ( ln d ivid u a l ch a nnel ad.iust) . 1 1 0 d 8 6 0 H2 , 150H2, 400H2 , ikHz,2.4kHz,6 k H z , 1 5 k H z Total Harmonic Distortion (1 kHz, A ll Control; Flat, Output: 1V) 0 . 0 0 5 % Ga in (Co n t ro l: Flat) O d B 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 I n p u t l m p e d a n c e . . . S O k o h m s Output lmpedance No more than 600 ohms 6V Miscellaneous P o w e r R e q u i r e m e n t s . . . . A C 1 2 0 V , 6 0 H 2 P o w e r C o n s u m p t i o n . . 1 0 W 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 C o n n e c t i o n c o r d w i t h p i n p l u g s . . . . . . 2 Operating Instructions 1 NOTE: Specifications and the design subject to possibte modification without notice due to improvements. 3. BLOCK DIAGRAM L C H [- rN E Q U A L I Z E R / R E C I E Q I orrtA- f REc R C H r-tr{ EOUALI ZER L- our t_ R€C TAPE L plav gff o'ru t F n o,N ___i- EO REC POWER 6 p S l - 3 S l - 2 S r - r , , > l W Lt ! t--t 52 , uil TAPE I EO REC O N TAPE F O R S L I D E V O L U M E K N O B L E D 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 S I G N A L P O L E 2 . 4 k H z S I G N A L P O L E 6 k H z S I G N A L P O L E l 5 k H z S I G N A L p O L E R C h o n n e l ( S o m e o s L C h o n n e l ) 5 www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 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 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 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 to 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 before 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 side 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 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 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 emitted 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 selects 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 this 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 V R K N O B L E O t-? t q l € ( t a { I q l t - t l AC LII E Q A M P nrrenuai'e I + l l V Q23 Fig.4-2 Power supply circuit www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com s 2 s I E O U A L I Z E B ---Ea-E-ft- O N I I O F F Eo,N@l lGil;_l @:1,_ lerav 1; l-.--. -. --- -- J rAPE : | 4. L REc (t- O N I eo n@ ;Pr-Av@- TAPE u a e c @ r P L A Y f d - . - . - . - . - . l l T A P F x I - n e c { H eo rr@ I PLaY@ TAPE L eE. 6. ' ' - - v 6) eo - out O N I s 3 s r 2 s r I -- -l*@- eo rru(6- , - l i r P L A Y ( G . l - , TAPE : I -nEc (9. O e o - out eo rr'r@ r-rr-rv@ TAPE r n e c @ 6).o - OUT O N I O F F EouAL rzER I rG) eo t . 1 - o u r * Eo lN6-xl r PLAY(9 .l - IAPE ^ I q REc (gd O N 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 S 1 - 1 : E O U A L I Z E R I E O R E C S 1 - 2 : S1-3 : 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 FASTEN THAN * This classification shall be adjusted by each distributor because it depends on model number, temperature, humidity, etc. Function knob (EOUALIZER, EO RECI AAD€24 r+- Front panel base assembly ANM.l55 Function knob A (ADAPTOR/TAPE) AAD456 5 www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com Rear Panel View Terminal (EOUALIZER, TAPE AKB{78 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 Bonnet Case RemovqJ A t Power transformer (T1, 120V 4AT-806 I VR assembly AWX.243 Power switch " l assembly www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 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), such as 560 ohm and 47k ohm (tolerance is shown by J=5%, and K=10% ). 5 6 0 ( - l " 5 6 x I O t 5 6 1 . . . . . R D % P S E @ m J 4 7 ka 47 x 103 473. .. . . R D % P S a , u , F j 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 . . . . RN%SR trBE[Il 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 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 & Description GWM-244 AWX.243 OTHERS Mark Part No. AF Assembly VR Assembly Symbol & Description RESISTORS NOTE:When ordering resistors, conuert the resistance ualue into code form, and then rewrite the part no. as before. Mark Part No. Symbol & Doscription R D % P M ! ! C J R 1 _ R 7 9 SEMICONDUCTORS Mark Part No. Symbol & Description A * 4TT-806 T1 Power transformer (120V) ** M5218L o1-o3 A AKP-038 Ac socket (Ac OUTLETs) (NJM4558DX) A ADG_052 AC power cord * t 2SC1815 04-417 ( 2 S C 1 9 1 9 ) AF Assembly (GWM-2I14) ** 2sD313 o18.o1e CAPAC|TORS (2sD880) Mark Part No. Symbol & Description * * JAIO1 O2O cEA 100M 50L C1, C2, C5, C6 cE A R33M 50L C15, Cl6 cEA R68M 50L Cl7, Cl8 cE A 1 RsM 50L C19,C20 cEA 101M 2sL C37-C39 cEA 220M 25L C40.C41 cEA471M25L C35,C36 coMLA 124K50 C13,C14, C33, C34 coMA 153K 50 C29, C30 coMA 223K 50 C9, Cl0 coMA 393K 50 C31, C32 cojvf A 563K 50 C'.t1,C12 CKDYB 102K 50 C23,C24 CKDYB 222K50 C25,C26 CKDYB 391K 50 C21,C22 CKDYB 562K 50 C27,C2A CKDYB 822K 50 C7, C8 ccDSL 221J 50 C3, C4 ( 2 S A 1 1 1 5 / A / ) * * J C 5 0 1 (2SC2603/A/) * 'toE2 (st 801-02) * KZL120 * us1035 ( 1 51 555) 421-o,24 D 1 _ D 4 D5, D6 D 7 - D 1 2 , D l 5 , D 16 Symbol & Description T l O Y D l 3 B F D D 1 4 OTHERS Mark Part No. Terminal 4P (TAPE. EOUALIZER} AKB-078 www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com Switch Assembly Mark Part No. Symbol & Decription * * ASG-335 Power Switch Assembly Ug!_ Part No. Symbol & Description S2 Push switch (POWER) c42,C43 (0.01/AC150V) Symbol & Description * ACXO12 VR1-VR7 Slide resistor (with LED) (20k-83) External Apearance of Transistors and lCs M5218L NJM4558DX S 1 Push switch (EOUALI ZERl EO REC/TAPE} * AEL-382 D13 LED (POWER} VR Assembly (AWX-243) Mark Part No, Symbol & Dascription ** ASG-215 ACG-019 LED Assembly Mark Part No. .nn44 il++# - O rye" No_+q*T-- Lot No )fr/--n* 1I\ a.,-";*=-S$f-"* * / ll\ B U l l c u N a\$ rvnc ro--fi\.r] *-lM-"n" utu f-*/ rvoelro_ J\l I n,.ffi*-r-otno 1U\ Typ. No /-_\ .",ni\r}* rK vu[J - - 2SC1815 2SC1919 2SD313 2SD880 JAlOl JC501 2*26031A1 2s,A1115lAl a - www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 7. P.C.BOARDS CONNECTION VOLUME Ass'Y (aWX-Z+e) SWITCH Ass'y 29 24 DIAGRAM AF Ass'y l6wM.-Za+) A T t t 9I III 2 26 27 tt l l , r . , ^ . 1 7 t 8 VOLUME Ass'y (AWX-Z+g) Ol-O3 can be replaced as follows. M 5 2 1 8 1 'f".iill I -l#i,. I :H:,0I , ';8, www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 6 5 4 'y (GWM- 244) 'l'*'---*.'.',r-*P': .,.€f, r€t M R75 3.91 : EQ,rr,tN / ^ @ i ' r . : ,' : ','. ' l i i : t52i6L .. 9 f t € r 5 . . ' sQ11:l ' . A.!qf',,.. , ,. , EAiiq!r A O t5/ l+ f{,qE R€6r n \ y v lslE PL4Y A o(-v .o l4 r.l*'-0_!i H q:-+ + 0 E 2 . . l zL1.ao'.t r .," .9+'1]-_-,.; l 1 5 U S i O 3 5 - i ' )Y0!l,eFq , i . i .it!:..-,,--:--!; I ^ ^ Tlolso lH 0 9 0 5 0 7 Qr3 O.r8 Qfi qrs or7 o19 ar4 Qr6 Qrz Q408 u o Q 2 J Q20 a r o + Y # c 3 8 T- 1oo/25 , p T too/25 rl.6l 6 5 4 ^ __g+* 'rti#",.-z'+--n o*91{ t*--* l'------1 "'lot1 r$, .,3&r f 'l' 'az'' ^- ? r----fr ?",,# lu = lr.->{- +iddo R58 3.sl '"0 J \gL. rr[ *ili,.J 0 6 # o R a q q t k R 4 8 4 7 t 9 C2s:H^ '----9 -a 220O0 652 3.91 { r y ? - R34 750 . {q^ r*--41 4 -:a . a r 5 1 O o - -.{ . ----=< " - l 1 r t 2 k . il+---44/i----ai !}---+, r R i t 1 o o t . r ' , i . rii:,i^lrr-_-{ ii'i. t t o R9 4.71 R Z a . 7 t , , , Q (}+^.---;nii '.H4.---:rq RrE loo l l . o i - < z cHiLff d \>ro qs i .,ii:{M/+l Reo loo .,----------_ .:.i RrJ 560 + to/5o !|."3ar+.9_ -zzuu9 R6,r 3.9r osuJ 'tC)L' .,,I "-Hlf Q8 HAA€ e---- - 'ri",9-ili\---.e: ' R z i i o o R51 471 9C29 H /< lz>-- ;!o.ors 665 3 e1 K I \ I + ' , " v t t , , : R 3 7 ? 5 o # *A^---ail , . , , R t 3 l o o i ) *[1 o5l=l o o o o o o o o o o o Q o o o ( PoWER) :l > X aeu-cez rtl{fr L-J on lD I t l l dJ rFl e t r i t i l i i r a i on fb i l i l dJ lJo P O W E R + c a 6 0 7 T47O/2s o.--.|..

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