service manual
Contents
1. PE 45 VOLUME Ass y AW 60Hz 150 Hz i 1 1 I HO mn 1 21 1 27 CER NU T 1 1 SEEDER Seal di 2 1 qb E tha LLLA VR2 20k 20k 01 3 M5218L EQUALIZER 6 zd 2 tQ I50mA l ouT A L ch Qeza REC R9 47k TAPE 4 PLAY C i5 TARE PLAY RIO 4 7k L 4 Rch 10 50 92 1 2 D OUT 47k p IN 016 Q2 2 2 am CES E BUFFER AMP 2 018 19 250313 015 16 051035 EQUALIZER POWER SWITCH Ass y a a 044 10YD13BFD _ 021 JC501 918 22 REGULATOR PM sa z 22 ea d 2 i gt ONT Te 1 bia S 45 Q 100 25 2 ou RIS R75 1 09 Ios R73 3 9k Di a23 924 2 DIO gt 2 VOLUME Ass y AWX us R7 2 CK I f 2 R 1 71 35 bd D R7 3 A O 25 c40 6 2 HIA 05 750 Rue T3 25 Lj 1 1 S2 POWER 1 03 cae ASG 215 H 4105 xd t po m ER ti RIV L C42 43 6 019 1007 12. 3 Remove the front panel base ass y A Remove the two screws release the panel stay lock by pushing against the hook at point B ofthe front panel base ass y with the small screwdriver and remove the ass y by pull ing forward Assembly 4 Position the front panel base ass y on the panel stay 5 Attach the slide knob to the VR ass y control 6 Attach the front panel cover 7 Attach the bonnet case 13 Slide knob Front panel cover Front panel base ass y Parts List NOTES e Parts without part number cannot be supplied e The mark found on some component parts indicates the importance of the safety factor of the part Therefore when replacing be sure to use parts of identical designation For your Parts Stock Control the fast moving items are indicated with the marks and GENERALLY MOVES FASTER THAN This classification shall be adjusted by each distributor because it depends on model number temperature humidity etc Mark No Part No Description Mark No Part No Description 1 BBZ30PO80FZK Screw 3X 8 16 GWM 244 AF assembly 2 ANE 385 Bonnet case 17 038 socket OUTLETS 3 PMZ3OPOGOFZB Screw 3X 6 18 ADG 052 power cord 4 AAD 417 Push knob A POWER 19 730 100 2 Screw 3 X 10 5 AAD 456 Function knob A 20 AEC 327 Strain relief ADAPTOR TAPE 21 VBZ3OPOG0FMC Screw 3 X 6 6 ANM 155 Front panel base assembly
3. d 04 R72 25 elencate mie a 4 01 4 10 2 7 420 22 25 R74 1 05 6 2 120 is 07 12 N SORA R79 560 051035 zd Em se An ATT 806 l 52 772 2 2 e 1 AC POWER CORD Bue oT ADG 052 1 pus E AEL 382 POWER 1 VRIA 120V SIUS H 60 Hz LED Ass y AWX 243 VOLUME Ass y _ a O 6 The indicated semiconductors are representative ones only Other alternative semiconductors may be used and are listed in the parts list k 1 RESISTORS een 120 1 Indicated in 2 5 tolerance unless otherwise noted k bd ro Fog 6n M M9 F 196 G 2 10 M 20 tolerance pog ba 6 9 NUR BO NE 1 1 ost 1 Ia tyr 1 v 1 2 CAPACITORS lor 1 1 i 1 Indicated in capacity uF voltage V unless otherwise noted p pF h i i I 1 i 1 1 1 1 1 Indication without voltage is 50V except electrolytic capacitor A i to io i i FS F 1 T 4 3 JE TENE Lop e 3 VOLTA
4. 0V Power transformer 110v 120V 220V 240V Power transformer 220 240V Voltage selector switch AC socket AC OUTLETS AKP 038 AC power cord ADG 052 Strain relief AEC 327 Fuse 2A Packing case Operating instructions English Operating instructions Spanish Operating instructions English German French Italian 11 2 SPECIFICATIONS The specifications for SG 530 R R G WE WB and WP types are the same as the SG 530 KU type except for following sections Miscellaneous Power Requirements WE WB WP types AC220 240V 50 60Hz R R G types AC110V 120V 220V 240V 50 60Hz AKX 501 AKP 038 ADG 072 AHE 060 ARB 503 ARC 022 AKX 501 AKP 038 ADG 072 AHE 060 ARB 503 Non supply AKP 026 ADG 071 AEK 017 AHE 060 ARE 045 AHE 060 AR B 503 Non supply AHE 060 ARB 503 15 11 3 SCHEMATIC DIAGRAMS AND P C BOARD POWER SUPPLY CIRCUIT FOR R G TYPES POWER SWITCH Ass y 220 240 110 120 53 LINE VOLTAGE SELECTOR AKX 501 A0G O72 A 1101204 AC220 240v UNSWITCHED 50 60Hz MAX POWER SUPPLY CIRCUIT FOR WE TYPE FUSE Ass y POWER SWITCH Ass y e UNSWITCHED MAX An ATT 808 A Say ps GRN BRN i A AC POWER CORD 220 240V ADG 071 50 60 Hz b ey POWER SUPPLY CIRCUIT FOR WB TYPE P
5. 7 483 Slide knob FREQUENCY 8 ANM 154 Front panel cover 51 Power switch assembly 9 AAD 524 Function knob 52 LED assembly EQUALIZER EQ 53 Panel stay A 10 ATT 806 Power transformer 120V 54 Chassis 55 Switch assembly 11 903 Foot assembly 12 AWX 243 VR assembly 56 P C B holder 13 AEL 394 LED 57 Rear panel 14 558 Nylon rivet 15 WA35F100NO080 Washer 10 PACKING Parts List Mark No Part No Description 1 496 Operating instructions English ADE 005 Connection cord ADE 055 Connection cord Black 3 AHE 033 Packing case 4 AHA 308 Front rear pad 5 AHG 140 Sheet 6 023 Vinyl bag 14 11 FOR R R G WE WB AND WP TYPES Model SG 530 R R G WE WB and WP types are the same as the SG 530 KU with the exception of follow ing sections 11 1 CONTRAST OF MISCELLANEOUS PARTS NOTES e Parts without part number cannot be supplied e The mark found on some component parts indicates the importance of the safety factor of the part Therefore when replacing be sure to use parts of identical designation e For your Parts Stock Control marks GENERALLY MOVES FASTER THAN This classification shall be adjusted by each distributor because it depends on model number temperature humidity etc Part No the fast moving items are indicated with the Symbol amp Description WE type WP type Fuse Assembly P C board Power transformer 12
6. GE CURRENT alt 1 D E I 4 4 Signal voltage at 150 output 1kHz 411 ty 1 5 DC vol V 1 voltage V at input signal VR3 VRE 1 lt mA DC current at no input signal 20k 20k 20k 20k eee if E 4 OTHERS MEME LT wa Signal route E Lil l 1 The mark found on some component parts indicates the im u HEN ds portance of the safety factor of the part Therefore when replacing L be sure to use parts of identical designation dT VRI 7 FREQUENCY This is the basic schematic diagram but the actual circuit may vary 012 due to improvements in design lo T M 3 a _ o o sime o o GWM 244 e e 9 a 0554444 5 a o m u ae l i i B r 15 1 ALIZER SRUALIZER AM BUFFER 0 33 50 0 68 50 4 15 50 R23 R25 R27 i 100 270 1 29 aes caa 10750 RIS 0 015 0039 0 12 QI 272 560 R29 R37 R39 R9 47k 750 820 aig 820 916 1 R5 R53 R55 i Res 47 Res 47 Rez R69 3 9k 3 9k 3 9k p RI2 R58 R64 R66 Taro 100k RIO 47k San 3 9k aac 3 9k aso 3 9k 3 9k R56 3 9k 1 47k 47k 47k 47k 47k Q2 1 2 93 2 2 4 13 15 7 8 R30 95 R32 ST 95 R38 R40 aS R
7. K 50 C11 C12 Mark Part No CKDYB 102K 50 C23 C24 AKB 078 CKDYB 222K 50 C25 C26 CKDYB 391K 50 C21 C22 CKDYB 562K 50 C27 C28 CKDYB 822K 50 C7 CCDSL 221J 50 C3 C4 Symbol amp Description R1 R79 Symbol amp Description 01 03 04 017 018 019 020 021 024 01 04 05 06 07 012 015 016 014 Symbol amp Description Terminal 4P TAPE EQUALIZER Switch Assembly Mark Part No ASG 335 Power Switch Assembly Mark Part No ASG 215 ACG 019 LED Assembly Mark Part No AEL 382 Symbol amp Description 1 Push switch EQUALIZER EQ REC TAPE Symbol amp Description S2 Push switch POWER C42 C43 0 01 AC150V Symbol amp Description D13 LED POWER VR Assembly AWX 243 Mark Part No ACX 012 Symbol amp Description VR1 VR7 Slide resistor with LED 20k B3 External Apearance of Transistors and ICs M5218L 8 E NJM4558DX 5 8 1 Index 2SC 1815 Type No Lot No 25 1919 Lot No Type No hre B 250313 250880 JA101 JC501 2SC2603 A 25 1115 amr nares Ei 4 e L ib s zw 4 A 1 2 8 SCHEMATIC DIAGRAM I STANO BY SWITCH Ass y SI I EQUALIZER ASG 335 SI 2 EQ REC L 51 3 TAPE
8. N 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 60 Hz 150 Hz 400 Hz 1 kHz 2 4 kHz 6 kHz and 15 kHz The level of each octave can be varied throughout a range of 10 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 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 induc
9. OWER SWITCH Ass y AC POWER CORD ADG O63 220 240V 50 60 UNSWITCHED IOOW MAX POWER SUPPLY CIRCUIT FOR WP TYPE FUSE Ass y Fame SEL POWER p SWITCH Ass y An ATT 808 GRN 406 064 a AC 220 240V WHT 50 60Hz 16 Fuse Assembly WE type Fuse Assembly WP type
10. RL 50kQ LLL 6V Frequency Response 5 2 70kHz Signal to Noise Ratio A Network short circuited 1V Output 100dB Input Impedance 50k ohms Output Impedance No more than 600 ohms 3 BLOCK DIAGRAM 150 16 5dB O EQUALIZER REC EQ Q TAPE ADAPTOR TAPE EQ REC POWER SUPPLY R CH EQUALIZER L ovr REC TAPE L PLAY NOTE R Channel Same as L Channel Miscellaneous Power Requirements AC120V 60Hz Power Consumption 10W Dimensions 420 W x 97 H x 216 D mm 16 9 16 W x 3 13 16 H x 8 1 2 D in Weight without package 2 8kg 6 Ib 3oz Furnished Parts Connection cord with pin plugs 2 Operating 1 NOTE Specifications and the design subject to possible modification without notice due to improvements 6 5dB 26 5dBV at 1kHz N 60Hz SIGNAL POLE 52 AE 150Hz SIGNAL POLE 400Hz SIGNAL POLE VR3 5 IkHz SIGNAL POLE AL POLE K 2 4kHz SIGNAL 6kHz SIGNAL POLE K ISkHz SIGNAL POLE 016 il FOR SLIDE VOLUME KNOB LED Push button switches 81 1 81 2 and S1 3 are locked independently 4 CIRCUIT DESCRIPTIONS GRAPHIC EQUALIZER SECTIO
11. Service CIRCUIT DESCRIPTIONS REPAIR amp ADJUSTMENTS GRAPHIC EQUALIZER PIONEER ORDER NO ARP 125 0 G 930 MODEL SG 530 COMES IN SIX VERSIONS DISTINGUISHED AS FOLLOWS Voltage Remarks 120V only U S A model 110V 120V and 220V 240V Switchable General export model 110V 120V and 220V 240V Switchable U S Military model 220V 240V Europe model 220V 240V United Kingdom model 220V 240V Australia model This service manual is applicable to the KU type When repairing the R R G WE WB and WP types please see page 15 CONTENTS 1 FRONT PANEL FACILITIES 2 SPECIFICATIONS 5 2 5535 y 3 BLOCK 4 CIRCUIT DESCRIPTIONS b PARTS LOCATION rsen 6 PARTS LIST 5 5 55 555596 7 P C BOARDS CONNECTION DIAGRAM 9 8 SCHEMATIC DIAGRAM 11 B EXPLODED VIEW vesci mre kom E 13 10 PAGKING 5n RR Ia Rhee REGES 14 11 FOR R R G WE AND WP TYPES 15 PIONEER ELECTRONIC CORPORATION 4 1 Meguro 1 Chorne Meguro ku Tokyo 153 Japan PIONEER ELECTRONICS USA INC 1925 E Dominguez St Long Beach California 90810 U S A PIONEER ELECTRONIC EUROPE N V Luithagen Haven 9 2030 Antwerp Belgium PIONEER ELECTRONICS AUSTRALIA PTY LTD 178 184 Boundary Road Braeside Victoria 3195 Australi
12. a FG MAY 1982 Printed in Japan 1 FRONT PANEL FACILITIES POWER INDICATOR 2 OCTAVE CONTROLS e e o 2 a 9 1 POWER SWITCH D POWER SWITCH 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 position Always unplug the power cord from the wall socket when the 56 530 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 10dB as shown in the figure below seven frequency bands are centered at 60Hz 150Hz 400Hz 1kHz 2 4kHz 6kHz and 15kHz 60Hz 150Hz 400Hz TkHz 2 4kHz 6 2 15kHz _ RESPONSE gt s DUM 100 ik 10k FREQUENCY IN Hz Octave control variation curves ADAPTOR TAPE ON OFF SWITCH 4 EQUALIZER SWITCH ADAPTOR TAPE ON OFF SWITCH 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 te
13. az 9 820 750 HE 750 750 820 His Tk c22 C24 c26 c30 c32 C34 390p 00024 0015 0039 012 RIG RIB R20 R24 R26 R28 1 1 100 270 EQUALIZER BUFFER e f 90 90 ci2 c20 77 0008271 0022 T 0 056 T 0 33 50 T 0 68 50 T4 15 50 Ty t 4 i Q4 17 25 1815 EQUALIZER AMP ES 55 54 esperes peel Ass y AWX 243 7 0 2 5 9 0 0 RI 60Hz 150 400Hz kHz po paes quomm 1 1 1 1 y 1 1 1 1 lar I lT l w a pog 1 I i D d 4 oy 1 1 1 1 ES et il 1 SWITCHES LA E S1 1 EQUALIZER ON OFF 1 1 p 3 1 bones Cees LLL R ON OFF VRI VR2 VR3 VR4 514 2 EQ REC 20k 20k 20k 20k 61 3 ON OFF D 52 POWER ON STAND Bv The underlined indicates the switch position VRI 7 FREQUENCY 012 M MR 4 12 5222 EXPLODED VIEW 9 Se SA REMOVAL OF THE FRONT PANEL BASE ASS Y See the Disassembly Diagram 1 Remove the bonnet case 2 Remove the front panel cover Release the front panel cover lock by inserting a small screwdriver between point A ofthe front panel cover and point A of the front panel base ass y Then remove the front panel cover and remove the slide knob
14. l View Front panel cover ANM 154 Function knob EQUALIZER EQ REC AAD 524 Front panel base assembly ANM 155 Push knob A POWER AAD 417 Slide knob FREQUENCY T T Function knob A ADAPTOR TAPE AAD 483 AAD 456 Rear Panel View Bonnet case ANE 385 AC power cord Terminal EQUALIZER TAPE ADG 052 AKB 078 A AC socket AKP 038 Front View with Panel Removed LED D13 POWER AEL 382 m Mag os R A Na i 1 POr Push switen VW UM S1 EQUALIZER EQ b e ef e id D oea 4 2 Push switch ASG 335 S2 POWER tx RE S n ASG 215 Slide resistor VR1 VR7 with LED ACX 012 Top View with Bonnet Case Removed Power transformer T1 120V AAT 806 3 AF assembly GWM 244 VR assembly AWX 243 Switch assembly 6 PARTS LIST NOTES When ordering resistors first convert resistance values into code form as shown in Miscellaneous Parts P C BOARD ASSEMBLIES Mark Part No Mark Part No the following examples Ex 1 When there are 2 effective digits any digit apart from 0 such as 560 ohm and 47k ohm tolerance is shown by J 5 and 10 5602 56 x 10 561 RDAPS BEM J 47k2 47 x 10 473 RDAPS 000 J 0 52 ORS RN2H K 12 OLO Ix ae RSIP 000 Ex 2 When there are 3 effective digits such as in high precision
15. lized when this switch is OFF the equalizing circuit is by passed and the input signal is connected directly to the output ter minals INPUT Rt EQ AMP O ATTENUATE p OUTPUT Dm BOOST R2 FOR SLIDE VR KNOBLEO AC LINE Fig 4 2 Power supply circuit 513 512 911 513 512 511 ON EZA VLA E TARE EQUALJZER REC ING EQUALIZER EQUALIZER U PLAY ee een SeenON TAPE L REC 513 52 Q ON 13 Si 2 SII 7774 VLA OFF ING EQ IN r PLAY O n am ea ee m r PLAY OG TAPE L REC C AEG N SI 3 SI 2 51 1 N 022 ZZ EQ ING EQUALIZER H OUT r PLAY O 2 TAPE L nec G ON 512 SI 1 OFF OFF IN equauizer EQUALIZER OUT TAPE 0 E o TAPE PLAYBACK ROUTE S1 1 EQUALIZER 51 2 EQ REC 51 3 TAPE 5 PARTS LOCATION NOTES e The mark found on some component parts indicates the importance of the safety factor of the part Therefore when replacing be sure to use parts of identical designation e For your Parts Stock Control the fast moving items are indicated with the marks and GENERALLY MOVES FASTER THAN This classification shall be adjusted by each distributor because it depends on model number temperature humidity etc Front Pane
16. metal film resistors 5 62k2 562 x 10 5621 RNASR 8622 The A mark found on some component parts indicates the importance of the safety factor of the part Therefore when replacing be sure to use parts of identical designation For your Parts Stock Control the fast moving items are indicated with the marks and GENERALLY MOVES FASTER THAN This classification shall be adjusted by each distributor because it depends on model number temperature humidity etc RESISTORS NOTE When ordering resistors convert the resistance value into code form and then rewrite the part no as before Symbol amp Description E Mark Part No GWM 244 AF Assembly AWX 243 VR Assembly 5 SEMICONDUCTORS Symbol amp Description Part No ATT 806 T1 Power transformer 120V Mb2ISE B AKP 038 AC socket OUTLETS ADG 052 AC power cord KK 2901815 25 1919 AF Assembly GWM 244 2SD313 CAPACITORS 430888 Part No Symbol amp Description JA101 CEA 100M 50L C1 C2 C5 C6 ao CEA R33M 50L C15 C16 CEA R68M 50L C17 C18 25 2603 1R5M 50L C19 C20 10E2 CEA 101M 25L C37 C39 51801 02 CEA 220 251 C40 C41 x quie CEA 471M 25L C35 C36 SIEGE 124K 50 C13 C14 C33 C34 153K 50 C29 C30 223K 50 C9 C10 X OTHERS COMA 393K 50 C31 C32 563
17. rminals en ters the equalizer In the OFF position only the signal from the EQUALIZER INPUT terminals enters the equalizer EQUALIZER SWITCH Press the right hand EQUALIZER switch to compensate for the frequency response of the signals entering the EQUALIZER INPUT El terminals The compensated signals are then made available from the EQUALIZER OUTPUT terminals as the output signals Press both switches when recording signals which have been compensated by the SG 530 The compensated sig nals are then made available from the EQUALIZER OUTPUT EI terminals and ADAPTOR TAPE teminals The same source signals are output at the ADAPTOR TAPE terminals as the signals entering INPUT 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 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 connected the front panel s ADAPTOR TAPE switch func tions as a tape monitor switch 2 SPECIFICATIONS Graphic Equalizer Section Equalizer Range Individual channel adjust 10dB 60Hz 150Hz 400Hz 1kHz 2 4kHz 15kHz Total Harmonic Distortion 1kHz All Control Flat Output 1V Gain Control Flat OdB Max Output Voltage 1kHz T H D 0 01
18. tance 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 C1 C2 R3 and 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 IC1 conversely it is reduced when the slider is moved to the plus side POWER SUPPLY CIRCUIT 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 by the LED is steady Further the load on Q18 and Q21 is light because the LED current is obtained after full wave rectification Q23 goes ON when the EQ switch is turned ON to release GND on the base side and the LED lights when Q23 goes ON SWITCH SECTION e TAPE switch S1 3 This switch selects between a program source or a tape playback or REC monitor signal e EQ REC switch S1 1 and S1 2 Turning this switch on causes an equalized program source signal to be output to the REC terminals e switch S1 1 This switch determines whether or not a signal is to be equa
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