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Pioneer SA-9900 User's Manual

1. Description Part No Carbon film 56k RDXPS 563 Carbon film 16k RD PS 163J Carbon film 16k RD PS 163J Carbon film 16k RDXPS 163J Carbon film 16k RD PS 163J Carbon film 100 RD PS 101J Carbon film 100 RD PS 101 Carbon film 100 RD PS 101 Carbon film 100 RDXPS 101J Carbon film 1 3k RD PS 132J Carbon film 1 3k RD PS 132 Carbon film 47 RD PS 470 Carbon film 47 RD PS 470 Carbon film 47 RDXPS 470J Carbon film 47 RDXPS 470 Carbon film 1k RDXPS 102J Carbon film 1k RD PS 102 Carbon film 56k RD PS 563 Carbon film 56k RD PS 563J Carbon film 560 RD PS 561J Carbon film 560 RD PS 561 Carbon film 1 6k RD PS 162 Carbon film 1 6k RD PS 162 R39 Carbon film 56k RD PS 563J R40 Carbon film 56k RDXPS 563J R41 Carbon film 470 RD PS 471 R42 Carbon film 470 RD PS 471 R43 Carbon film 220 RD PS 221J R44 Carbon film 220 RD PS 221J R45 Carbon film 100 RDXPS 101J R46 Carbon film 100 RD PS 101J R47 Carbon film 100 RD PS 101J R48 Carbon film 100 RDAPS 101 R49 Carbon film 18k RD PS 183 R50 Carbon film 18k RD PS 183J R51 Carbon film 18k RD PS 183 R52 Carbon film 18k RD PS 183 R53 Metal oxide film 4 7k 2w RS2P 472J R54 Metal oxide film 4 7k 2W RS2P 472J R55 Metal oxide film 4 7k 2w RS2P 472J R56 Metal oxide film 4 7k 2W RS2P 472J R57 Metal oxide film 10 2W RS2P 100J R58 Metal oxide film 10 2W RS2P 100J R59 Metal oxide film 10 2W RS2P 100J R60 Metal oxide film 10 2W RS2P 100J Wire wo
2. Symbol Description Part No R26 Carbon film RD PS 274 R27 Carbon film RDXPS 225 R28 Carbon film RD PS 225 R29 Carbon film RD PS 222 R30 Carbon film RD PS 222 R31 Carbon film RD PS 225 R32 Carbon film RDAPS 225 R33 Carbon film RD PS 302 R34 Carbon film RD PS 302 R35 Carbon film RD PS 225 R36 Carbon film 2 2M RDXPS 225 R37 Carbon film 4 7k RD 4PS 472J R38 Carbon film 4 7k RDXPS 472 R39 Carbon film 2 2M RD PS 225 R40 Carbon film 2 2M RDXPS 225J R41 Carbon film 7 5k RD PS 752 R42 Carbon film 7 5k RD PS 752 R43 Carbon film 2 2M RD PS 225J R44 Carbon film 2 2M RD PS 225J R45 Carbon film 16k RD PS 163 R46 Carbon film 16k RDAPS 163 R47 Carbon film 100k RDXPS 104 R48 Carbon film 100k RDAPS 104 R49 Carbon film 150k 154J R50 Carbon film 150k RD PS 154J R51 Carbon film 240k RD PS 244 R52 Carbon film 240k RDXPS 244J R53 Carbon film 390k RDXPS 394J R54 Carbon film 390k RD PS 394 R55 Carbon film 910k RD PS 914 R56 Carbon film 910k RD PS 914 R57 Carbon film 51k RD PS 513J R58 Carbon film 51k RDAPS 513 R59 Carbon film 2 2M RDXPS 225 R60 Carbon film 2 2M RD PS 225J R61 Carbon film 20k RDXPS 203 R62 Carbon film 20k RD PS 203 R63 Carbon film 2 2M RD PS 225J R64 Carbon film 2 2M RD PS 225J R65 Carbon film 30k RD PS 303J R66 Carbon film 30k RD PS 303J R67 Carbon film 2 2M RD PS 225J R68 Carbon film 2 2M RD7PS 225J R69 Carbon film 62k RD PS 623J R70 Carbon film 62k RD PS 623 R71 Carbon fil
3. 56 10 13 Switch Circuit Assembly AWS 080 0 62 BAGKINGUMETHOL L s i7 s 67 1 SPECIFICATIONS SEMICONDUCTORS 10 74 E ER 33 POWER AMPLIFIER SECTION cars N y alae 2 stage differential amplifiers 3 stage Darlington parallel push pull pure complementary OCL 110 WATTS PER CHANNEL MIN RMS AT 8 OHMS FROM 20Hz to 20kHz WITH NO MORE THAN 0 1 TOTAL HARMONIC DISTORTION Continuous RMS Power Output 10Hz 20kHz Both channels driven 110W 110W 452 1kHz Both channels driven 120W 120W 852 120W 120W 452 Total Harmonic Distortion 20Hz 20kHz Continuous Power Output Less than 0 1 55W Power Output 89 Less than 0 04 1W Power Output 80 Less than 0 04 Intermodulation Distortion Continuous Power Output Less than 0 196 55W Power Output 80 Less than 0 04 1W Power Output 80 Less than 0 04 Power Bandwith Distortion IHF Both channels driven 5Hz 40kHz T H D 0 1 Frequency Response 10Hz 80kHz e dB Input Sensitivity Impedance POWER AMP INI a Output acre 40 162 B 89 162 Headphone 40 162 Damping Factor ys More than 30 Hum 8 Noise Short circuited More than 110dB PREAMPLIFIER SECT
4. SWITCH Ass y AWS 080 1 4 2SCI45IP LOW FILTER SWITCHES S FUNCTION SELECTOR RATS PHONO 2 MIC 2 PHONO 3 TUNER 0 2208 gt 4 So BASS CONTROL T Sa DUPLICATE 021598 17 598 1 598 STEP 0 OFF 2 ON TREBLE CONTROL LIOKHz Ss TAPE MONITOR 17 2548 1 1548 1 598 STEP n Y SOURCE 3 2 Se TREBLE CONTROL Se PHONO 2 IMPEDANCE 11 4546 7 4 548 1546 STEP 01 BKA 2 50 3 70K 2 4 So BASS CONTROL 50Hz sk Ss MODE SELECTOR 1 amp 5dB 70 45dB 1598 STEP 2 REV ISTERED LAR WIL 5 Su PRE POWER AMP H Se ATTENUATOR gt 0 NORMAL 2 SEPARATED 1048 7 1548 31 3045 56 SPEAKER SELECTOR 1 QFE 0 8 WAB m AWS 079 POWER SUPPLY CIRCUIT Ass y AWR 077 AWX 073 7 27 OTES RESISTORS IN OHM 55 TOLERANCE UNLESS OTERWISE NOTED K KQ M MQ CAPACITORS IN F UNLESS OTHERWISE NOTED P oF 9 RELAY SIGNAL VOLTAGE NECESSARY FOR OBTAINING Pe ene RELAT 1400 82 OU
5. TUNER R224 IK 412 2SA628AP 40 T 2561451 a Cp is IK 644750 1K NL I Aux 11 Aux 2 2 I 15 SWITCHES 1 FUNCTION TAPE DUPLICATE PHONO 2 1 OFF 2 PHONO 1 2 ON 3 TUNER TAPE MONITOR 4 AUX 1 d 5 AUX 2 2 SOURCE 4 2 860 A 18IW3SSV LINDYID 1 OL SA 9900 w Nez ALCUN kwe vea w NCC ru 4 90 7 8 9019 Lt AHH 1 05 oe Ake edho 1700090 10000 909 0 02 Bey 4001 o h WSL Std 8 zu Ak 10 MUGI vos owt w 022 Ay w w XSL Ay aw E NGGE Ay S 5 t G eh DS 28K AES b S 9 C4100P Rg isok 2SK34 23 O17 200 019 ofS 220 0210 1 5 Ake 25 024 68 ofo G 1725 9 6 t Foil Side 32 2SA763UL 2SA809 2SC1451 31 C B 2SA628AP 2SC869P 2SK34 D Parts List of Input Circuit Assembly AWK 038 C CAPACITORS Symbol Description Part No Electrolytic 1 25V CSZA 010M 25 C2 Electrolytic 1 25V CSZA 010M 25 Ceramic 100p 50V CKDYB 101K 50 C4 Ceramic 100p 50V CKDYB 101K 50 C5 Ceramic 10p 50V CCDSL 100F 50 C6 Ceramic 10p 50
6. ATKON Res 05 SW SW af 25 26 18 25010195 tud Rog 22 40 8425559 Reg 050 Ra 0 5 Sw 28 De Sen E sov eg 181886 x2 Foil Side 07 STV 3H Dig 151886 151886 abe 928 9 p 988151 60 MS SO 58 Rss 4 7K 2W MS GO 29 2 01 658 NG 50 998 WW MS oo 827251 82 01 298 4 ee 81 qi X1 ley af 91 3 x Ya 9 a 09S wee Hy DLE 09 Sy Cont HE ALS 999151 Sia Dii 151886 PR AEX 003 1 229 2501318 0 24V OFF OFF f reao VON MC 185 mah 01 2 5 lt 3 99915190 op RC A1S 90 ley ge 012151886 M2 OL 894 MS SO 29 MS 60 994 cre 28 29 30 31 i AVA 6600 12 100919 NZ 01094 Ha T W AG 60 898 w amp OLOY T cum m EXT NZ 988151 00 gt 9 00 e Ake 21 28 819 26 2 Rse 4 7K 2W D Dig 151886 Dia 151886 11 ne web 20 HE 19 00 OO 00 00 00 Parts List of Power Amplifier Assembly AWH 037 A CAPACITORS Symbol Description Part No C1 Electroiytic 0 68 25V CSSA R68M 2
7. R47 1K he 9 2501451 2 77 250145 5 37 Parts List of Control Amplifier Assembly AWG 031 0 CAPACITORS Description Part No Electrolytic CSZA 010M 35 Electrolytic CSZA 010M 35 Ceramic CCDSL 470K 50 Ceramic CCDSL 470K 50 Electrolytic CEA 221P 6 Electrolytic CEA 221P 6 Ceramic CCDSL 030C 50 Ceramic CCDSL 030C 50 Electrolytic CEANL 4R7P 25 Electrolytic ko CEANL 4R7P 25 Electrolytic CSZA 010M 35 Electrolytic CSZA 010M 35 Ceramic CCDSL 100F 50 Ceramic CCDSL 100F 50 Electrolytic CEANL 100P 25 Electrolytic CEANL 100P 25 RESISTORS Description Part No _ Carbon film 2 2k RDXPS 222J Carbon film 2 2k RD PS 222 Carbon film 620k RDXPS 624 Carbon film 620k RD PS 624J Carbon film 120k RDXPS 124 Carbon film 120k RD PS 124 Carbon film 30k RD PS 303 Carbon film 30k RDXPS 303J Carbon film 20k RDXPS 203 Carbon film 20k RD PS 203 Carbon film 6 2k RD PS 622J Carbon film 6 2k RD PS 622 Carbon film 1k RD PS 102 Carbon film 1k RD PS 102 Carbon film 220 RD PS 221 Carbon film 220 RD PS 221 Carbon film 1M RD PS 105 Carbon film 1M RD PS 105 Carbon film 5 1k RDY PS 512 Carbon film 5 1k RDXPS 512 Carbon film 68k RD PS 683J Carbon film 68k RD PS 683 Carbon film 270k RD PS 274 Carbon film 270k RDXPS 274 Carbon film 1k RDX PS 102 38 SA 9900 Symbol Description Part No R26 Carbon film 100k RDXPS 104 R27 Carbon film 1k RD
8. 25 1384 25 684 Ene E 6 4 5 5 d Ary 1 258507 582v abe amp NS 290868 2SD313P 58 51 Parts List of Power Supply Circuit Assembly 2 AWR 070 A CAPACITORS Description Part No Ceramic 0 01 ACG 004 0 Ceramic 0 01 ACG 004 0 Ceramic 0 01 ACG 004 0 Ceramic 0 01 ACG 004 0 Electrolytic 470 ACH 038 0 Electrolytic 470 ACH 038 0 Electrolytic 100 CEA 101P 63 Surge temperatures 85 C Electrolytic 100 CEA 101P 63 Surge temperatures 85 C Ceramic 0 01 CKDYF 103Z 50 Ceramic 0 01 CKDYF 103Z 50 Electrolytic 47 CEA 470P 16 Electrolytic 47 CEA 470P 16 Ceramic 100p CCDSL 101K 50 Ceramic 100p CCDSL 101K 50 Electrolytic 100 CEA 101P 50 Electrolytic CEA 101P 50 Electrolytic CEA 471P 50 Electrolytic CEA 471P 50 Electrolytic CEA 4R7P 35 Electrolytic CEA 100P 63 RESISTORS Description Part No Carbon film RD PS 512J Carbon film RDAPS 512J Carbon film RD PS 272 Carbon film RD PS 272J Carbon film RD PS 123 Carbon film RD PS 123J Carbon film RD PS 473 Carbon film RD PS 473J Carbon film RDAPS 152J Carbon film RD PS 152J Carbon film RD PS 912J Carbon film RD PS 912J Carbon film RDAPS 100J Carbon film RD PS 100J Carbon film 222J Carbon film 153J Carbon film RD PS 104 Carbon film RD PS 334 Carbon film RD PS 225J Carbon film RD PS 155J Carbon film RDAPS 684J 52 Description SA 93900 Semi fixed Semi fixed SEMICONDUCTORS
9. Description Transistor 2SD313P D or E 02 Transistor 2SB507P D or E 03 Transistor 2SC869 C or D 2SC1649 N or P 04 Transistor 2SA628A C or D 2SA834 N or 05 Transistor 28C1384 Q 06 Transistor 25 684 07 Transistor 2SC869 C or D 2SC1649 N or as Transistor 2SA628A C or D 2SA834 N or P o9 Transistor 2SC869 C or D 2SC1649 N or P 010 Transistor 2SA628A C or D 2SA834 N or P D1 Diode 51801 02 151886 02 Diode 51801 02 151886 03 Diode SIB01 02 151886 04 Diode SIBO1 02 151886 Zener diode WZ 130 Zener diode 152473 151555 OTHERS Description Part No Fuse clip 013 0 Heat sink ANH 259 0 10 10 POWER SUPPLY CIRCUIT ASSEMBLY AWR 077 0 ieee Foil Side Q 2361318 8 553 TS1 I E 5 2 3 3 ls 2 23 15 55 8 5191 25 T m d Rie 254720 UP 2SA628A 2 3 PANEN EE 254697 55 25 834 25 1211 25 1649 25 869 25 1318 254720 TES BER Parts List of Power Supply Circuit Assembly 3 AWR 077 0 CAPACITORS Description Part No Ceramic 0 01 CKDYF 103Z 50 Ceramic 0 01 CKDYF 103Z 50 Electrolytic 47 CEA 470P 16 Electrolytic 47 CEA 470P 16 Ceramic 0 01 CKDYF 103Z 50 Ceramic 0 01 CKDYF 103Z 50 RESISTORS Description Part No Semi fixed 10k B ACP 036 0 Semi fix
10. RN SR 1541F R25 Metal film 75k RN 4SR 7502F R26 Metal film 75k RN SR 7502F R27 Metal film 953k 5 9533F R28 Metal film 953k RN SR 9533F R29 Carbon film 1k 102J R30 Carbon film 1k RD PS 102J R31 Carbon film 220 RD PS 221J R32 Carbon film 220 221J R33 Carbon film 220 RD PS 221J R34 Carbon film 220 RD PS 221J R35 Carbon film 56 RDXPS 560J R36 Carbon film 56 RD PS 560J R37 Carbon film 1k RD PS 102J R38 Carbon film 1k RDXPS 102J R39 Carbon film 100k 104 R40 Carbon film 100k RD PS 104J R41 Carbon film 2 2k 222J R42 Carbon film 2 2k 222 R43 Carbon film 2 2k RD PS 222 R44 Carbon film 2 2k RD 4PS 222 Carbon film RD PS 102 SEMICONDUCTORS Symbol Description Part No Q1 FET 2SK34 D 02 2SK34 D or C 03 FET 2SK34 D or C 04 2SK34 D or C 05 Transistor 2SA628AP D or C 2SA763UL 4 06 Transistor 2SA628AP D or C 2SA763UL 4 07 Transistor 2SC869P D or C 08 Transistor 2SC869P D C 09 Transistor 2SC1451 V or S 010 Transistor 25 1451 Bor S 011 Transistor 2SA809 V B or Q12 Transistor 2SA809 V B or P1 Diode 152473 SWITCH Symbol Description Part No 1 Rotary switch FUNCTION ASD 021 A 2 Lever switch TAPE DUPLICATE ASK 084 A 3 Lever switch TAPE MONITOR ASK 086 A 34 Parts List of Input Circuit Assembly SA 9900 OTHERS Description Part No Phono jack 4 jacks AKB 023 0 Phono jack 6 ja
11. 0502 ELE Rw 2sci4siP Tug 0 IOK CAN Ra 200M R Ras 47K 47 2 5 BP AN Hl 10K Rag 470K 0 2SC1451P I I T T T T lt 25 29 2 1598 4 LOW FILTER 1 15 2 0FF Sg HIGH FILTER 1 12 2 0FF TONE EE 2 POTENTIOMETER BALANCE 10K 0 080 SMV A18W3SSV LINDYID HOLIMS L OL 9900 f 2SC1451P aE 3 T 6 T Ra 120K Re 470 Rio 180K Re 80K 220K 4 Foil Side 63 Parts List of Switch Circuit Assembly AWS 080 0 CAPACITORS Description Part No Electrolytic 2 2 CEANL 2R2P 50 Electrolytic 2 2 CEANL 2R2P 50 Ceramic 100p CCDSL 101K 50 Ceramic 100p CCDSL 101K 50 Electrolytic 47 CEANL 4R7P 35 Electrolytic 47 CEANL 4R7P 35 Electrolytic 2 2 CEANL 2R2P 50 Electrolytic 2 2 CEANL 2R2P 50 Ceramic 100p CCDSL 101K 50 Ceramic 100p CCDSL 101K 50 Electrolytic 47 CEANL 4R7P 35 Electrolytic 4 7 CEANL 4R7P 35 Electrolytic 0 22 CSZA R22M 35 Electrolytic 0 22 CSZA R22M 35 Electrolytic 0 22 CSZA R22M 35 Electrolytic 0 22 CSZA R22M 35 Electrolytic 0 1 CSZA OR1M 35 Electrolytic 0 1 CSZA OR1M 35 Electrolytic 0 1 CSZA OR1M 35 Electrolytic 0 1 CSZA OR1M 35 Mylar CQMA 272J
12. ty Mono reproduction of left channel signal through both speakers R Mono reproduction of right channel signal through both speakers VOLUME CONTROL Adjusts output level to speakers and headphones Scale is graduated in dB with OdB at maximum level When employed in combination with the ATTENUATOR switch finer and wider range attenuation can be perform ed PILOT LAMP Lights when AC power is turned on FUNCTION SWITCH PHONO 1 For playing records on a turntable con nected to the PHONO 1 jacks MIC PHONO 2 Same as above for PHONO 2 jacks or for reproduction through a microphone con nected to the MIC jack on the front panel Note when the microphone is connected to the jack the turntable connected to the PHONO 2 jacks cannot be used TUNER For listening to broadcasts through the tuner AUX 1 For playing signals fed to the AUX 1 jacks AUX 2 Same as above for AUX 2 jacks MIC JACK Accepts the plug of the microphone TAPE MONITOR SWITCH Vs Playback or monitoring of tape deck connect ed to the TAPE 1 REC amp PB jacks SOURCE Set to this position at times other than tape playback 9 Playback or monitoring of tape deck connect ed to the TAPE 2 REC amp PB jacks TAPE DUPLICATE SWITCH Set to ON when employing 2 tape decks to duplicate or edit tapes Be sure to set to OFF upper position at other times BALANCE CONTROL Adjusts left and right volume balance of speakers and headphones Turn c
13. Sk lt EE 256945 152472 eh 250945 470 6 470 6 Foil Side 1 002 003 004 RAT3K oo R21 3K R3 1 3K 00 RI13K 00 9 0010 0011 09 152471 0012 2SC869 mex 9 9 9 AN 9 4 Lus 08 152473 Di Da 1S2472x2 Re 15K gt Re 15K 92 250869 04 152412 02 152472 05 152472 87 15 wy 9 9 256669 s k Ds 1S2472 01 1S2472 Rs 15K R24 22K 10V 92v 1 2561384 R23 24K oH e H 4 41 25 96 1 EDE 250945 826 22 65 470 6 15K Ria 15K Ge D7 152473 100 16 R27 470 C oW 25473 Dio EQAOT 33R 2SC945 25 733 TEF 2SC1384 B VES 47 Parts List of Protection Circuit Assembly AWM 071 0 CAPACITORS Symbol Description Part No Electrolytic 0 22 10V CSSA R22M 10 2 Electrolytic 0 22 10V CSSA R22M 10 Electrolytic 470 6V CEA 471P 6 C4 Electrolytic 470 6V CEA 471P 6 C5 Electrolytic 4 7 25V CEA 4R7P 25 C6 Electrolytic 100 16V CEA 101P 16 RESISTORS Description Part No R1 Carbon film 1 3k RDXPS 132 R2 Carbon film 1 3k RDXPS 132J R3 Carbon film 1 3k RDXPS 132 R4 Carbon film 1 3k RD PS 132 R5 Carbon film 15k RD PS 153 R6 Carbon film 15k RD PS 153 R7 Carbon film 15k RDXPS 153 R8 Carbon film 15k RD PS 153 R9 Carbon film 75k RD PS 753 R10
14. Variable resistor 50k VOLUME Description RS2P 472 RS2P 472J RD PS 393 RD PS 823J ACV 144 A 2SA679S Y or R 2SA747A R O or Y 25 6795 or R 2SA747A R or 25 10795 2SC1116A R O Y 25010795 R 2SC1116A R or 2SA679S Y 2SA747A R or Y Transistor Transistor Transistor Transistor Transistor 2SA679S Y or R 2SA7474A R O or Y 2SC1079S Y 2SC116A R O or 2SC1079S Y or R 2SC1116A R O or Y Transistor Transistor Transistor OTHERS Description Part No T1 Power transformer ATT 206 0 S14 Slide switch PRE POWER AMP ASH 012 0 S15 Rotary switch SPEAKERS ASB 047 0 16 Relay ASR 009 A 17 Relay ASR 01 1 0 18 Push switch POWER ASG 043 B F1 Fuse 8A primary AEK 300 0 F2 Fuse 1A secondary AEK 106 0 F3 Fuse 1 secondary AEK 106 0 F4 Fuse 1A lamp AEK 106 0 PL1 Lamp 8V 50mA with leads pilot AEL 022 0 PL2 Lamp 8V 50mA with leads scale AEL 022 0 PL3 Lamp 8V 50mA with leads scale AEL 022 0 99 0 PHONO 2 a 18 gt 219 220 Q5 9 53K CAN AW a Rn 3K SEN 2SA628AP 41 2 Ras 15 410 10 Ce 470 ico Ro 1 9Px2 Q 25 1451 cs10P c ATSAN Ror 1 Reg IK 48V 1K PHONO 1 pHono 2 Ww
15. TONE Description ASD 020 A ASK 087 A ASK 085 0 ASK 085 0 ASK 091 A Part No Nut 9 66 Internal lock washer Screw B71 004 0 ABE 001 0 ABA 002 0 Parts List of Tone Switch Circuit Assembly SA 9900 11 PACKING METHOD AHA 077 0 Side pad L 129 024 0 078 0 Side pad R AHC 017 0 Inside packing Packing case 67
16. Mylar 272 Mylar 472J 50 50 Mylar CQMA 472J 50 Mylar CQMA 562J 50 Mylar 562 50 Mylar 822J 50 Mylar CQMA 822J 50 Electrolytic CEANL 2R2P 50 Electrolytic CEANL 2R2P 50 Ceramic CCDSL 101K 50 Ceramic CCDSL 101K 50 Electrolytic b CEANL 4R7P 35 Electrolytic 5 CEANL 4R7P 35 Electrolytic CEANL 4R7P 35 Electrolytic CEANL 100P 25 Ceramic CCDSL 101K 50 Ceramic CCDSL 101K 50 RESISTORS Description Part No SA 9900 Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Variable resistor 50k AC BALANCE 2 2k 2 2k 120k 120k 470 470 180k 180k 180k 180k 20k 20k 22k 22k 5 1k 5 1k 750 750 1k 1k RD PS RD PS RDXPS RD PS RD PS RD PS RD PS RDXPS RDXPS RDXPS RDXPS RDXPS RDXPS RDXPS RD PS RD PS RDXPS RD PS RDXPS RDXPS RDXPS RDXPS RDXPS RDXPS RDPS RDX PS RDXPS RDXPS RDXPS RDXPS RD PS
17. the relay operates Fig 14 9 EXPLODED VIEW AND PARTS LIST Parts List of Exploded View NOTE Parts number is subject to change for the purpose of improvement with notice of a service bulletin Service bulletin will be furnished whenever necessary and you are requested to amend parts number in this manual according to the instructions NOTICE Any parts asterisked are subject to being not supplied Description Part No Wire guide ANK 073 A Side panel 1 ANB 316 0 Side stay L AND 081 A Slide switch mount ANF 287 0 Slide switch S14 PRE POWER AMP ASH 012 0 Tone switch circuit assembly AWS 079 0 Switch circuit assembly AWS 080 0 Shield cover ANH 234 0 Rotary switch S15 SPEAKERS ASB 047 0 141 Panel stay AND 086 0 12 Push switch S18 POWER ASG 043 B 139 Switch mount plate 289 0 14 5 K72 026 0 15 Variable resistor VR2 VOLUME ACV 144 A 16 Claw washer ABE 001 0 17 Special nut ABN 009 0 18 Nut 99 B71 004 0 19 Lamp holder AEB 051 A 20 Lamp with leads PL1 8V 50mA AEL 022 0 21 Front panel assembly ANB 314 A 22 Washer t 1mm M45 086 A 23 Nut 99 B71 004 0 24 Knob BASS 50Hz BASS 100Hz TREBLE 10kHz TREBLE 20kHz SPEAKERS MODE BALANCE AAB 086 0 25 Knob TONE LOW FILTER HIGH FILTER ATTENUATOR TAPE MONITOR TAPE DUPLICATE AAD 040 B 26 Knob POWER AAD 086 0 27 Knob VOLUME 085 28 Knob FUNCTION AAB 084 0 29 Power transformer ATT 2
18. 0 8 POWER SUPPLY CIRCUIT ASSEMBLY 1 AWR 069 A Foil Side oo woo gt 00 02 SG STR Ca 001 63 001 oH C1001 C4001 Di SG 5TS Parts List of Power Supply Circuit Assembly 1 AWR 069 A Description Part No Ceramic capacitor 0 01 ACG 004 0 Ceramic capacitor 0 01 ACG 004 0 Ceramic capacitor 0 01 ACG 004 0 Ceramic capacitor 0 01 ACG 004 0 Diode SG 5TS Diode SG 5TR Heat sink ANH 187 B Jumper ADX 006 A Insulator water AEC 076 0 Insulator bush E32 047 0 Fuse clip AKR 013 0 8900 10 9 POWER SUPPLY CIRCUIT ASSEMBLY 2 AWR 070 A Cs 470 80 100 63 LI Rz51K Hii o BGS Qz 2SB507P Foil Side Rig 22 aw C 10 63 54 gu Ma AUI Rig 100K 0 2SA628A 2546844 Dj 2 190 1267 4424 nd 25A608A 100K 5 SE el 9 XV4 458 Roo 15M 680K EP 13 8 6v WI30 Ri 91K Re 3448 T 10 6300 g Q1 2546284 ss 250869 Qa 2506288 13V 5 4 1 410 80 Re 47K Rig 15K 47 16 10 90 a 5 410 80 06 100 50 95 100 63 2SD313P 2SB507P C E B 2SC869 2SA628A 2SC1649 2SA834
19. 06 0 30 Shield cover 233 31 Control amplifier assembly AWG 031 0 32 Protection circuit assembly AWM 071 0 33 Sub chassis ANF 290 0 34 Power supply circuit assembly 1 AWR 069 A 35 Cover AC outlet AEC 181 0 36 AC socket AKP 005 0 37 Push terminal SPEAKERS AKE 025 0 38 Relay S16 ASR 009 A 22 SA 93900 Note Any parts asterisked are subject to being not supplied Key No Description Part No 39 Cover phono jack AEC 182 0 40 Phono jack 4 jacks RCA type AKB 023 0 41 Chassis L ANA 077 B 42 Wire clip A AEC 009 0 43 Chassis C ANA 075 B 44 Wire clip D AEC 024 0 45 Boss AEC 183 0 46 Fuse board assembly AWX 083 0 47 Ground terminal 2P K13 048 0 48 Chassls R ANA 076 A 49 Input circuit assembly AWK 038 C 50 Binding post GND AKE 012 A 51 Claw washer ABE 006 0 52 Nut 79 B71 010 0 53 Side panel ANB 315 0 54 Knob PHONO 2 LEVEL IMPEDANCE AAB 046 A 55 Electrolytic capacitor 22 000uF 63V C1 C2 ACH 046 0 56 Front shield cover ANH 231 A 57 Top cover ANE 072 A 58 Shield cover ANH 232 0 59 Fuse 1A F4 lamp AEK 106 0 60 Fuse 1A F2 F3 secondary AEK 106 0 61 Power supply circuit assembly 2 AWR 070 A 62 Volume circuit assembly AWX 073 A 63 Cover power transistor ANE 073 B 64 Power amplifier block Refer to P 24 65 Side stay R AND 080 A 66 Bottom plate ANE 071 A 67 Foot assembly AEC 178 0 68 Ground terminal 4P K13 047 0 69 Fuse 8A F1 primary AE
20. 1 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 Description Part No SA 9900 Styrol 300p COSA 301J Styrol 150p COSA 151J Styrol 150p COSA 151J Styrol 330p 331J Styrol 330p 331J Styrol 200p 201J Styrol 200p 201J Styrol 100p COSA 101J Styrol 100p COSA 101J Mylar 0 03 303J Mylar 0 03 303J Mylar 0 018 183J Mylar 0 018 CQMA 183J Mylar 0 051 513J Mylar 0 051 513J Mylar 0 047 473 Mylar 0 047 473 50 Mylar 0 036 363 50 Mylar 0 036 363 50 Mylar 0 068 683 50 Mylar 0 068 CQMA 683J 50 RESISTORS Description Part No Carbon film RDXPS 512J Carbon film RDXPS 512J Carbon film RD PS 562J Carbon film RDXPS 562J Carbon film RDXPS 302J Carbon film RD PS 302J Carbon film RD PS 822J Carbon film RD PS 822J Carbon film RD PS 163 Carbon film RD PS 163 Carbon film RD PS 333 Carbon film RD PS 333 Carbon film RD PS 123 Carbon film RDYPS 123 Carbon film RDXPS 823 Carbon film RD PS 823 Carbon film RDXPS 184 Carbon film RD PS 1841 Carbon film RD PS 304 Carbon film RD PS 304 Carbon film RDXPS 474 Carbon film RD PS 474J Carbon film RDXPS 684J Carbon film RD PS 684J Carbon film RDXPS 274J Parts List of Switch Circuit Assembly Continued on the Next Page 59
21. 11 Transistor 2SA809 V B or G 012 Transistor 2SA809 V B or G 013 Transistor 2SA809 V B or G 014 Transistor 2SA809 V B or G 015 Transistor 2SC1451 V Bor G Parts List of Power Amplifier Assembly Continued on the Next Page 45 Description Transistor 28 1451 Bor G Transistor 2SA839 Y O or R Transistor 2SA839 Y O or R Transistor 2SC1669 Y O or R Transistor 2SC1669 Y O or R Transistor 2SC1318 R or Q Transistor 2SC1318 R or Q Transistor 2SC1509 R or Q Posistor AEX 003 0 Posistor AEX 003 0 Diode 152473 Diode 152473 Varistor STV 3H Varistor STV 3H Varistor STV 3H Varistor STV 3H Diode 1 1886 51801 02 Diode 15 1886 SIB01 02 Diode 15 1886 SIB01 02 Diode 15 1886 51801 02 Diode 15 1886 51801 02 Diode 15 1886 51801 02 Diode 1S 1886 SIBO1 02 Diode 15 1886 51801 02 Diode 1 1886 51801 02 Diode 1 1886 51801 02 Diode 1S 1886 SIBO1 02 Diode 1S 1886 SIBO1 02 OTHERS Description Part No Heat sink ANH 237 0 Transistor socket AKH 002 0 Insulator wafer AEC 078 0 Spacer ANG 108 0 Choke coil 2 2uH T63 009 0 Choke coil 2 2uH T63 009 0 46 Parts List of Power Amplifier Assembly 9900 10 6 PROTECTION CIRCUIT ASSEMBLY AWM 071 0 Dg Da 1S2473 x2 DeEQA01 33R 1 Ras 24K m jJ 256869 1 D pup 25A733 ef 1824122 D 8 5 256945 5
22. 5 52 Electrolytic 0 68 25V CSSA R68M 25 Ceramic 120p 50V CCDSL 121K 50 Ceramic 120p 50V CCDSL 121K 50 C5 Electrolytic 10 16V CEA 100P 16 Electrolytic 10 16V CEA 100P 16 C7 Ceramic 47p 50V CCDSL 470K 50 Ceramic 47 50V CCDSL 470K 50 c9 Ceramic 39p 50v CCDSL 390K 50 c10 Ceramic 39p 50V CCDSL 390K 50 C11 Ceramic 10p 500V CCDSL 100K 500 C12 Ceramic 10p 500V CCDSL 100K 500 C13 Mylar 0 039 50V 393 50 C14 Mylar 0 039 50V 393 50 C15 Ceramic 0 047 150V ACG 009 0 C16 Ceramic 0 047 150 ACG 009 0 C17 Ceramic 82p 500V CCDSL 820K 500 C18 Ceramic 82p 500V CCDSL 820K 500 C19 Ceramic 82 500V CCDSL 820K 500 C20 Ceramic 82p 500v CCDSL 820K 500 C21 Ceramic 0 047 150V ACG 009 0 C22 Ceramic 0 047 150V ACG 009 0 C23 Mylar 0 039 50V 393J 50 C24 Mylar 0 039 50V 393 50 C25 Electrolytic 470 6v CEA 471P 6 C26 Electrolytic 470 6V CEA 471P 6 C27 Electrolytic 470 6v CEA 471P 6 C28 Electrolytic 470 6v CEA 471P 6 RESISTORS Symbol Description Part No R1 Carbon film 560k RD PS 564J R2 Carbon film 560k RD 4PS 564J R3 Carbon film 150 151J R4 Carbon film 150 RDPS 151J R5 Carbon film 150 151J R6 Carbon film 150 RD PS 151 R7 Carbon film 47k RD PS 473 R8 Carbon film 47k RD PS 473 R9 R10 R11 Carbon film 3 3k RD PS 332 R12 Carbon film 3 3k 332 R13 Carbon film 47k RD PS 473J R14 Carbon film 47k RDXPS 473 R15 Carbon film 56k RD PS 563 43
23. ACITORS Symbol Description Part No C1 Mylar 0 47 C2 Mylar 0 47 c3 Ceramic 330p C4 Ceramic 330p C5 Mylar 0 16 C6 Mylar 0 16 C7 Mylar 0 075 C8 Mylar 0 075 C9 Mylar 0 047 C10 Mylar 0 047 C11 Mylar 0 13 C12 Mylar 0 13 C13 Mylar 0 016 C14 Mylar 0 016 C15 Mylar 0 0075 C16 Mylar 0 0075 C17 Mylar 0 0047 C18 Mylar 0 0047 C19 Mylar 0 0036 C20 Mylar 0 0036 C21 Mylar 0 0027 C22 Mylar 0 0027 C23 Mylar 0 0068 C24 Mylar 0 0068 C25 Mylar 0 0051 C26 Mylar 0 0051 C27 Mylar 0 0039 C28 Mylar 0 0039 C29 Mylar 0 0024 C30 Mylar 0 0024 C31 Mylar 0 0011 C32 Mylar 0 0011 C33 Styrol 130p C34 Styrol 130p C35 Styrol 100p C36 Styrol 100p C37 Styrol 75p C38 Styrol 75p C39 Styrol 43p C40 Styrol 43p C41 Styrol 22p C42 Styrol 22p C43 Styrol 510p C44 Styrol 510p C45 Styrol 300p 58 CQMA 474K 50 CQMA 474K 50 CKDYB 331K 50 CKDYB 331K 50 COMA COSA 164J 164 753 753 4731 4735 134 134 163J 163J 752J 752J 472J 472J 362J 362J 272J 272J 682J 682J 512J 512J 392J 392J 242J 242J 112J 112J 131J 131J 101J 101J 750J 750J 430J 430J 220 220 511 511 30
24. Carbon film 75k 753 R11 Carbon film 22k RD PS 222J R12 Carbon film 2 2k RD PS 222 R13 Carbon film 15k RD PS 153 R14 Carbon film 15k RDXPS 153 R15 Carbon film 82 RD PS 820J R16 Carbon film 82 RDXPS 820 R17 Carbon film 5 6k RD PS 562 R18 Carbon film 150k RDXPS 154 R19 Carbon film 15k RD PS 153 R20 Carbon film 15k RD PS 153J R21 Carbon film 68k RDXPS 683 R22 Carbon film 12k RDXPS 123 R23 Carbon film 15k RDXPS 153 R24 Carbon film 2 2k RDXPS 222 R25 Carbon film 150k RDXPS 154 R26 Carbon film 22 RDXPS 220 R27 Carbon film 470 471 R28 Carbon film 47k RDXPS 473 R29 Carbon film 2 4k RDXPS 242 s I SA SSOO SEMICONDUCTORS Description Transistor 2SC869 C or D Transistor 2SC869 C or D Transistor 2SC945 Q Transistor 2SC945 Q Transistor 2SA733 Q Transistor 2SC945 Q or Transistor 2SC1384 R or Q Diode 152472 151554 Diode 152472 151554 Diode 1 2472 151554 Diode 152472 151554 Diode 152472 151554 Diode 152473 151555 Diode 152473 1S1555 Diode 152473 151555 Diode 152471 Zener diode EQA01 33R 10 7 FUSE BOARD ASSEMBLY AWX 083 0 Foil Side Re 160 5w Ry 150 5w 44 1 Rs 14 a 2 Wow Parts List of Fuse Board Assembly AWX 083 0 Symbol Description Part No Fuse clip AKR 013 0 R1 Wire wound resistor 150 SW RT5B 151K R2 Wire wound resistor 150 RT5B 151K 49 1
25. ION Circuitry Equalizer amplifier 3 stage direct coupled class A SEPP type with 1st stage FET equiped differential amplifier Gontrol 3 stage direct coupled type with 1st stage FET equiped differential amplifier Input Sensitivity Impedance S Ste 2 5mV 50kQ2 Mie LOM MES USES DR 2 5mV 10mV 35kQ2 70k2 100k 2 MA ee drive 6mV 24mV 85k2 150mV 50k NUD r 150mV 50kQ 150mV 50kQ SA 93900 SAPETE aaa 150mV 50kQ SAFE PRE 225255254 essay 150mV 50kQ PHONO Overload Level T H D 0 1 500mV 1kHz 500mV 1 0 1kHz Output Level Impedance PAPE REU 150mV TAPE 150mV 2V 1KX2 Harmonic Distortion Less than 0 05 Frequency Response PHONO RIAA equalization 30Hz 15kHz 0 2dB TUNER AUX 7Hz 40kHz 20 Tone Control 1 5dB step BASS care sucre SUB 4 5dB 50Hz MAIN 7 5dB 100Hz p a Be SUB 4 5dB 20kHz MAIN 7 5dB 10kHz FILTER Mn gt 15Hz 30Hz 12dB oct Herm ee hen ee ere ale 8kHz 12kHz 12dB oct Hum amp Noise IHF Short circuited A Network mc M m More than 70dB Ba E MEE More than 65dB TUNER AUX TAPE PB More than 95dB 0 15dB 30dB MISCELLANEO
26. K 300 0 70 Cord grommet AEC 079 0 71 AC power cord ADG 011 0 72 Shield plate ANH 247 0 73 Wire clip S AEC 037 0 74 Lock plate AEC 193 0 75 board mount metal ANF 309 A 76 Power supply circuit assembly 3 AWR 077 0 77 Nut insulator AEC 085 0 78 Phono jack MIC K72 020 0 79 Washer insulator E32 045 A 80 Washer insulator 4 004 0 81 Relay S17 ASR 011 0 82 Tapping screw 4X8 ABA 079 A Tapping screw 4X12 ABA 083 0 Key No 64 Power Amplifier Block NOTICE Any parts asterisked are subject to being not supplied AWH 037 A Power amplifier assembly ANH 235 A Shield plate ANF 288 0 1 board clamp Q T 3X8 AKH 001 0 Transistor socket ANF 291 A PC board mount plate ANH 236 B Heat sink AEC 076 0 Insulator wafer 2SC1079S or 2SC1116A Transistor Q27 Q23 DU Qu P M3x16 P M3X16 ips B 2546798 25 747 Transistor 021 025 28C10798 or 28C1116A H Transistor O24 Q28 gt 2SA679S 2SA747A Transistor 026 022 9900 Screws Exploded View BA Tapping screw Fig A TS Tapping screw Fig B Pan head B Binding head 2 5 5 3 x Attached 27 10 SCHEMATIC DIAGRAMS P C BOARD PATTERNS AND PARTS LIST 10 1 SCHEMATIC DIAGRAM
27. NCE MODE SPEAKERS AC power cord RISUS 025 0 AC socket Push terminal ANB 314 A Front panel ass y ASR 009 A Relay AWM 071 0 Protection circuit ass y AKB 023 AWS 079 0 Tone switch circuit ass y AWG 031 0 Control amplifier ass y Phono jack 4 jacks 18 9900 Bottom View AAD 086 0 Knob POWER AWH 037 A ATT 206 0 Power amplifier ass y Power transformer AWX 083 0 Fuse board ass y ASG 043 B Push switch POWER Ii o ere Na een ul u AWK 038 C ACH 046 0 38 Electrolytic capacitor Input circuit ass y 22 000 63V K72 020 0 ERE ace Phone jack MIC Power supply circuit ass y 3 AAD 040 B Knob TAPE MONITOR TAPE DUPLICATE HIGH FILTER LOW FILTER TONE ATTENUATOR 19 8 ADJUSTING PROCEDURES FOR JUNCTION POINT AND IDLE CURRENT Set up a Remove the top cover and bottom plate and stand the main body with the heat sinks down b Before turning on the POWER switch turn VR3 and VR4 all the way to the left counterclockwise c For adjustment wait 10 minutes after the POWER switch is turned on Adjusting procedures 1 Set the PRE POWER AMP switch to the SEPARATED lower position 2 Fit 5 1kQ resistors to the POWER IN terminals as shown in Fig 13 3 Co
28. Pull out the printed circuit board from the bosses Remove the bottom plate Pull out the printed circuit board from the bosses Removing the Fuse Board Assembly Fig 11 N Removing the Pilot Lamps Fig 12 1 2 3 4 5 Remove the top cover front shield cover and bottom plate The power indicating lamp and the two upper VOLUME control illuminating lamps can now be pulled out of the lamp holders Remove the front panel Unscrew the twenty four 24 screws of the panel stay and PHONES jack SPEAKERS selector switch shaft and VOLUME control shaft nuts and washers Incline the panel stay to the front When this has been done the lower VOLUME control illuminating lamp can be pulled out of its lamp holder Panel stay ass y Input circuit ass y Fig 10 8A fuse F1 Phono jack 4 jacks Power Up S NS dp gi outlets Fig 11 S Pilot lamps Fig 12 17 7 PARTS LOCATION Top View AKE 012 A Binding post GND 046 Knob PHONO 2 MIC LEVEL AWR 069 A PHONO 2 IMPEDANCE Power supply circuit ass y 1 semis n GND AABr0840 ee Knob FUNCTION AWR 070 A ACV 144 A Power supply circuit Variable resistor ass y 2 VOLUME AAB 085 A Knob VOLUME ASR 011 0 H Relay E AAB 086 0 Knob BASS TREBLE ADG 011 0 BALA
29. R 1 759B 1 7 5 1548 step i PROTECTION CIRCUIT ASS Y 4 AUX 1 5 AUX 2 eee CONTROL 10 kHz SI Fuse 45 1 3 A D an 1 5dB 11 7 5dB 1588 step 52 TAPE DUPLICATE TREBLE CONTROL 20kHz 6 Over load 7 1 OFF 2 45dB 7 45dB 1 588 5 Senser 5 13 BASS CONTROL 50Hz LIKE Sa TAPE MONITOR 45dB 7 4548 15dB step ME 3 2 PRE POWER AMP SE PAND Seay E 4 1 NORMAL 2 SEPARATED 1 2 5040 c ME 1 1 REV 2 NORM ILIR 4L 5R 56 ATTENUATOR Sis RELAY 2 1548 3 518 57 LOW FILTER 115Hz 2 02 3 POTENTIOMETERS TRANSFORMER POWER SUPPLY CIRCUIT ASS Y 2 58 HIGH FILTER PHONO 2 LEVEL 12kHz 2 02 3 8kHz VR2 VOLUME Sg TONE BALANCE 2 0N 5 BRIEF DESCRIPTION AND FEATURES OF CIRCUITS Equalizer Amplifier Circuit The circuit diagram of the equalizer amplifier circuit used in the SA 9900 is shown in Fig 1 The first stage of this circuit is a differential amplifier consisting of two field effect transis tors FETs and the output stage is a single ended push pull SEPP amplifier which pro vides a maximum output signal voltage of approximately 29V with a distortion of 1 1 Selection of input impedance If the resistance R1 in Fig 1 is infinite the input impedance of the equalizer amplifier circu
30. RDXPS RD PS RDYPS RD PS RD PS RD PS RD PS RD PS RD PS RD PS RDXPS RD PS RDXPS ACV 145 0 222J 222J 124J 124J 471J 471J 184J 184J 184J 184J 203J 203J 223J 223J 512J 512J 751J 751J 102J 102J 184J 184J 184J 184J 153J 153J 224J 224J 332J 332J 473J 473J 332J 332J 434J 434J 471J 471J 224J 224J 224J 224J 103J 103J 474J Parts List of Switch Circuit Assembly Continued on the Next Page 65 Symbol Description Part No R56 Carbon film SEMICONDUCTORS Description R46 Carbon film 470k R47 Carbon film 47k R48 Carbon film 47k R49 Carbon composition 200M R50 Carbon composition 200M R51 Carbon film 1k R52 Carbon film 1k R53 Carbon film 8 2k R54 Carbon film 8 2k R55 Carbon film 10k 10k RDXPS 474J RD PS 473J 473J ACN 001 0 ACN 001 0 RD PS 102J RD PS 102J RD PS 822J RD PS 822 RD PS 103 RD PS 103 Transistor 02 Transistor Q3 Transistor Q4 Transistor 05 Transistor 06 Transistor 07 Transistor Transistor SWITCHES Symbol 2SC1451P V or S 2SC1451P V or S 2SC1451P V BorS 2SC1451P V Bor S 2SC1451P V Bor S 2SC1451P V or S 2SK30A Y or GR 2SK30A Y or GR Description Part No 1 Rotary switch 52 Lever switch 3 Lever switch 54 Lever switch 5 Lever switch OTHERS MODE ATTENUATOR FILTER HIGH FILTER
31. SERVICE MANUAL STEREO AMPLIFIER SA 9900 U PIONEER ss 10 11 SPECIFICATIONS SS coe are ANG aa 4 4 5 0 4 3 FRONT PANEL FACILITIES 5 CONNECTION DIAGRAM Ye 7 DOGOK DIAGRAM ec 9 BRIEF DESCRIPTION AND FEATURES OF CIRCUITS 11 DISASSEMBLY INSTRUCTIONS 4r ee eee tener mnm 13 PA IG ATION cs shark cassius S RR sus a sns CERT 18 ADJUSTING PROCEDURES FOR JUNCTION POINT ANDUDLE CURRENT 53000 03 2 69 contes m 20 EXPEODED VIEWCAND PARTS BIST NIS e ee 98 e s 22 SCHEMATIC DIAGRAMS P C BOARD PATTERNS AND PARTS LIST 2221225 27 pa AN 5 22 RE 29 10 3 Input Circuit Assembly AWK 038 30 10 4 Control Amplifier Assembly AWG 031 36 10 5 Power Amplifier Assembly 037 40 10 6 Protection Circuit Assembly AWM 071 47 10 7 Fuse Board Assembly AWX 083 49 10 8 Power Supply Circuit Assembly 1 069 50 10 9 Power Supply Circuit Assembly 2 070 51 10 10 Power Supply Circuit Assembly 3 077 54 10 11 Volume Circuit Assembly AWX 073 55 10 12 Tone Switch Circuit Assembly 5 079
32. TPUT POWER ERARE IPIE V DC VOLTAGE AT NO INPUT SIGNAL lt DC CURRENT AT NO INPUT SIGNAL CONTROL AMP 03 AWS 080 34 225045182 ia Ei Pr 5 2SC14SIP 2 poet ce chy 3 E NIS 9 estis sae pow SPEAKER Wt ar D POWER AMP ASS y 037 Gini 02125078956 ZSCISI 2546094 722 P tle aie uud 3 CIS FUSE Assy AWx 083 ut 25 6785 1 POWER SUPPLY CIRCUIT ASS y AWR 070 poo asama Pu DA SCALE LWP AWR 069 sgh Ply DIAL SCALE LAMP VS0cA POWER SUPPLY CIRCUIT Assy AWR 069 Yo I2W 80 Hg 4 sante ON s SWITCHED TOTAL 28 10 2 ELECTRO PARTS SA 9900 CAPACITORS Symbol Description Part No C1 Electrolytic 22 000 63v ACH 046 0 C2 Electrolytic 22 000 63V ACH 046 0 Ceramic 0 01 250V ACG 001 0 C4 Ceramic 0 01 AC 150V DC 1 4kV ACG 003 0 C5 Mylar 0 0047 50V 472K 50 C6 Mylar 0 0027 50V 272K 50 RESISTORS Description Part No SEMICONDUCTORS Metal oxide film 4 7k Metal oxide film 4 7k Carbon film 39k Carbon film 82k
33. US Power Requirements AC 120V 60Hz Power Consumption 500W NCSD UT Vae 2 Switched 1 Unswitched 420 W 165 H 403 0 mm 16 1 2 x 6 1 2 15 7 8 Weight Without Package 20kg 44 Ib 1 oz With package u voe 22 4kg 49 Ib 6 oz FURNISHED PARTS Hex Wrench used for fasting VOLUME MD ey DE 1 Factory Tested ria 1 Operating Instructions 1 Measured pursuant to Federal Trade Commission s Trade Regulation rule on Power Output Claims for Amplifiers NOTE Specifications and the design subject to possible modification without notice due to improvements 2 FRONT PANEL FACILITIES SPEAKERS SWITCH OFF Cuts off speaker sound when using head phones only Sound obtained from speakers connected to A speaker terminals B Sound obtained from speakers connected to B speaker terminals A B Sound obtained from speakers connected to both A and B speaker terminals POWER SWITCH Depress to turn on AC power After the POWER switch is set toON a few seconds will elapse before sound is obtained This is due to the built in muting circuit and does not signify difficulty PHONES JACK Output jack for stereo headphones TONE SWITCH When set to OFF the TONE control circuit is disengaged and frequency response becomes flat The BASS and TREBLE twin controls do not function at this time Convenient for checking phono cartridge and spea
34. V CCDSL 100F 50 C7 Electrolytic 470 10V CEA 471P 10 C8 Electrolytic 470 10V CEA 471P 10 C9 Styrol 1000 50V 1026 50 Styrol 1000 50V CQSA 102G 50 C11 Styrol 3600p 50V COSA 362G 50 C12 Styrol 3600p 50V 3626 50 C13 Electrolytic 4 7 50 CEANL 4R7P 50 C14 Electrolytic 4 7 50V CEANL 4R7P 50 C15 Mylar 0 0047 50V COMA 472J 50 C16 Mylar 0 0047 50V COMA 472J 50 C17 Ceramic 470p 50V CKDYB 471K 50 C18 Ceramic 470p 50V CKDYB 471K 50 C19 Electrolytic 100 50V CEA 101P 50 C20 Ceramic 0 01 50V CKDYB 103K 50 C21 Ceramic 68p 50V CCDSL 680K 50 C22 Ceramic 68p 50V CCDSL 680K 50 Description Part No R1 Carbon film 100k RD PS 104J R2 Carbon film 100k RD PS 104J R3 Carbon film 620k RD PS 624J R4 Carbon film 620k RD PS 624 5 Carbon film 2 2k RD PS 222 R6 Carbon film 2 2k RD 4PS 222 R7 Carbon film 120k RD PS 124J R8 Carbon film 120k RD PS 124J R9 Carbon film 75k RD PS 753 R10 Carbon film 75k RD PS 753J R11 Carbon film 3 9k RD PS 392J R12 Carbon film 3 9k RD PS 392 R13 Carbon film 1k RD PS 102J R14 Carbon film 1k RD PS 102 R15 Carbon film 220 RD PS 221J R16 Carbon film 220 RDXPS 221 R17 Carbon film 3 2k RDXPS 332 R18 Carbon film 3 2k RD PS 332J R19 Carbon film 1k 102J R20 Carbon film 1k RD PS 102J 33 Description Part No R21 Carbon film 1k RD PS 102J R22 Carbon film 47k RD PS 473 R23 Metal film 1 54 xW RN SR 1541F R24 Metal film 1 54k
35. XPS 102J R28 Carbon film 1k RD PS 102 R29 Metal oxide film 5 6k 1W RS1P 562J R30 Metal oxide film 5 6k 1W RS1P 562J Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film 220k 220k 51k 51k 33k 33k 33k 33k 18k 18k 560k 560k 1k 1k RD PS RD PS RD PS RDXPS HDPS RDXPS RDXPS RDXPS RDXPS RDXPS RD PS RDXPS RD PS RDAPS RDAPS RD PS RD PS RD PS RD PS RD PS 224J 224J 513J 513J 333J 333J 333J 333J 183J 183J 564J 564J 102J 102J 123J 123J 102J 102J 224J 224J SEMICONDUCTORS Symbol Description FET 2SK34 D or C 02 FET 2SK34 D or C o3 FET 2SK34 D or C Q4 FET 2SK34 D or C Q5 Transistor 2SA628AP D or C 06 Transistor 2SA628AP D or C Q7 Transistor 2SC869P D or C as Transistor 2SC869P D or C ag Transistor 2SC1451 B VorS 010 Transistor 28C1451 B V or S 011 Transistor 2SC1451P V or S 012 Transistor 2SC1451P V D1 Diode 182473 10 5 POWER AMPLIFIER ASSEMBLY AWH 037 A NOTE The power transistors 021 Qos are excluded from parts of this assembly an2SA839 151886 4 ore 27 9 AFW E Re 2009 0038 muc AAN Ly 22 8
36. cks AKB 024 0 10 4 CONTROL AMPLIFIER ASSEMBLY AWG 031 0 36 Qii2SC1451P 202 MOZZ 58 1K 6V NL 02 25 1451 Mu 8 Sy 301 9 NANG wee Sy AAN yoz fy ML 24 2561451 lt lt N OV 47 25 NL 2SC869P 9 Sy MI ey Qio 2SA628AP 06 a MODI Sy d SA 93900 Foil Side Ras 1K Rso 220K 560K 9 NW e MUN CEN GS 2501451 Rao 56K w Rae 33K R34 51 54 Rae 12K 1 20 R32 220K 3T Rag 33K e Ra 270K 06 Reg 1K 2SA628AP a RE Reo 51K 2 Rig 220 Ree 68K 9 5 Ria 1K 2SC1451P FP Rie 1M 94 Fe Riz 62K A 279 cS oo D Rio 20K T P 08 gt e ud 620K A s Re 30K m 120K Tg d od 47 Ras 1K 2SK34 oe 01152413 2SC869P gt i Rs 120K EU 47 Rog 100K 2SA628P ijo 93 ce WW R7 30K E Rg 20K B Ru 6 2K Ris 1K Ris 220 2SK34 R23 270K Rer 1K D 7 R31 220K R37 33K S oo R33 51K R45 12K 72W OO q 9 o d We Ras 33K R29 5 6K 1W R39 18K 560K R49 220K 9 9
37. d be taken in handling the SA 9900 KCU since it is very heavy and the front panel and heat sink fins are exposed 2 When replacing components be sure to disassemble them in the correct order and to identify the disassembly positions 3 Most of the printed circuit boards cannot be checked unless they are removed from the chassis When removing them great care should be taken not to touch them against any other components nor to short any circuit 4 Do not exert excessive force on the side panel stays as they may be bent 5 There are many screws of different types It is recommended therefore that you make a note of the positions from which they are removed Removing the Top Cover Unscrew the six 6 screws A on the top cover Lift up the top cover Removing the Front Shield Cover After removing the top cover unscrew the two 2 screws on the front shield cover Lift up the front shield cover Removing the Front Panel Remove all front panel knobs C except the POWER switch knob For the VOLUME con trol knob loosen the set screws with a hexagonal wrench before removing it Remove the BASS 50Hz SPEAKERS and FUNCTION switch shaft nuts and washers The front panel is ready for removal Removing the Bottom Plate Stand the main body with the heat sink down Unscrew the ten 10 screws D Remove the bottom plate Removing the Right Side Panel input terminal side After removing the top cover and f
38. ed 10k B ACP 036 0 Carbon film 10 RD PS 100J Carbon film 10 RD PS 100J Carbon film 4 7k RD PS 472 Carbon film 4 7k RD PS 472 Carbon film 8 2k RD PS 822 Carbon film 8 2k RD PS 822 Carbon film 33k RD PS 333 Carbon film 33k RD PS 333 Carbon film RD PS 822J Carbon film RD PS 822J SEMICONDUCTORS 9900 Description Transistor Transistor Transistor Transistor Zener diode Zener diode 2SC1318 R Q or S 25 1211 D or E 2SA720 R Qor S 2SA697 C D or E 25 869 or D 2SC1649 N or P 2SA628A C or D 2SA834 N or P WZ 130 2 130 10 11 VOLUME CIRCUIT ASSEMBLY AWX 073 A Foil Side 1 910 9778 9 49 S Ra 13K 500K 159 1 83 3K 48 6 A5 8 500K 159 K 8438 10 12 TONE SWITCH CIRCUIT ASSEMBLY AWS 079 0 1 598 STEP 4 598 4 588 1 588 STEP TREBLE CONTROL 20kHz BASS CONTROL 50 2 4 5dB 4548 3n Ss 7 5dB 7 5dB 1 5dB STEP TREBLE CONTROL 10kHz 1 5dB 7 5dB 1 5dB STEP BASS CONTROL 100Hz Sto Su SWITCHES 56 SA 99300 Ca 00027 devs 9221 1 iko He ES 15000 2000 29 Wo 11000 2 55000 8 89000 7 09 ol O12 o8 9PIS 57 Parts List of Tone Switch Circuit Assembly AWS 079 0 CAP
39. heat sink temperature is detected by posistors positive coefficient thermistor which are placed in the circuit shown in Fig 3 As shown in the resistance tempera ture characteristic Fig 4 the posistor resistance hardly changes up to a certain temperature but increases abruptly at temperatures higher than the temperature specified In the over heating prevention circuit shown in Fig 3 the posistors serve as the bias circuits for transistors which operate the relay if the heat sink temperature exceeds the over heating temperature The relay then changes the power transformer secondary winding tap connections so that the secondary voltage is lowered thus preventing the heat sink temperature from increasing too much Muting gate Power amp rom 9 5 Heat sink Fig 3 Diagram of Heat Sink Overheating Preventing Circuit Resistance R A Temperature Operating point Fig 4 Posistor Resistance Temperature Characteristic amp overload detector Power ON OFF detector Rectifier Relay T Lo Speaker M p sansa Temperature detector 2 Relay driver io transformer DC detector 2 AC120V Relay Overcurrent RC time constant circuit Relay driver Fig 2 Block Diagram of Protection Circuit 12 6 DISASSEMBLY INSTRUCTIONS Disassembly Cautions 1 Great care shoul
40. it is designed so as to be 100 If the FUNCTION selector switch on the front panel is set to PHONO 1 the re sistance of R1 is 100k2 thus the input impedance of the PHONO 1 terminals becomes 50 If the FUNCTION selector switch is set to PHONO2 MIC the resistance of R1 can be selected 53 8kQ 100kQ 233kQ infinity with the PHONO 2 IMPEDANCE switch on the right hand side panel The input impedance of the PHONO 2 terminals therefore can be set to 35 50 70 or 100k 2 Changing of input sensitivity The amount of AC signal negative feed back in the equalizer amplifier circuit is determined by the values of the equalizer RC network and resistor R2 If the FUNC TION selector switch is set to PHONO 1 the resistance of R2 is 1 54kQ This was established so that the rated output can be obtained with input signal of 2 5mV at 1kHz If the FUNCTION selector switch is set to PHONO 2 MIC the resistance of R2 can be varied in the range 1 54 3 24 kQ with the PHONO 2 MIC LEVEL con trol on the right hand side panel This permits the input sensitivity to be varied between 2 5 and 5mV By turning the PHONO 2 MIC LEVEL control the vari able resistor VR indicated by a dotted line in Fig 1 also moves The input sensitivity of the PHONO 2 terminals can therefore be varied throughout the range 2 5 10mV Protection Circuit Fig 2 is a block diagram of the protection circuit used in the SA 9900 The protection circuit func
41. ker tone tone control effectiveness and listening room acoustics BASS TWIN CONTROL Adjusts low frequency tone 100Hz Adjusts frequence band below 400Hz Control effectiveness at 100Hz is 7 5dB 50Hz Provides additional control to the 100Hz knob for the frequency band below 200Hz Control effectiveness at 50Hz is 4 548 TREBLE TWIN CONTROL Adjusts high frequency tone 10kHz Adjusts frequency band above 2 5 2 Con trol effectiveness at 10kHz is 7 54 20kHz Provides additional control to the 10kHz knob for the frequency band above SkHz Control effectiyeness at 20kHz is 4 5dB LOW FILTER SWITCH Attenuates low frequency noise 15Hz Provides 12dB octave attenuation for fre quencies below 15Hz OFF Set to this position when not employing filter 30Hz Provides 12dB octave attenuation for fre quencies below 30Hz HIGH FILTER SWITCH Attenuates high frequency noise such as scratches and tape hiss 12kHz Provides 12dB octave attenuation for fre quencies above 12kHz OFF Set to this position when not employing filter 8kHz Provides 12dB octave attenuation for fre quencies above 8kHz ATTENUATOR SWITCH Attenuates the output level as follows OdB No attenuation 154 Attenuates by 1548 30dB Attenuates by 30dB MODE SWITCH REV Reverses left and right channel stereo signals STEREO Normal stereo reproduction L R Mixes left and right channel signals for mono reproduction
42. lockwise from center to increase right channel R volume and counterclockwise from center to increase left channel L volume 3 CONNECTION DIAGRAM PRE POWER AMP Switch Move stopper to changing switch setting NORMAL SEPARATED Stopner PRE POWERAMP OUTLETS SPEAKERS Left channel UNSWITCHED SWITCHED mamn mem MAX TOTAL IOOW jt R 18 R POWERIN PRE OUT AB 40 160 SPEAKER A B 80 160 SPEAKER oo Right channel POWER IN PRE OUT jacks Can supply up to 100W Not coupled with POWER switch Can supply up to 100W R A speaker systems B speaker systems SA 9900 PHONO 2 PHONO 2 MIC IMPEDANCE Switch LEVEL Control PHONO2 Mic LEVEL 2 PHONO1 2 TUNER AUX AUX2 REC PB REC PB Ground L terminal Ground INPUT Tape deck cassette Tape deck Open reel or cassette 4 BLOCK DIAGRAM CONTROL ASS Y POWER ASSY Buffer amplifier NFB type NFB type 12dB oct 12dB oct SWITCH 2 2 CIRCUIT ASS Y SWITCH CIRCUIT ASS Y oSsc RIGHT CHANNEL LEFT CHANNEL 48V 48V ELE eee L POWER SUPPLY CIRCUIT ASSY 3 PILOT LAMPS SWITCHES 51 FUNCTION BASS CONTROL 100 Hz 1 PHONO 2 2 PHONO 1 3 TUNE
43. m 2 2M RD PS 225J R72 Carbon film 2 2M RD PS 225J R73 Carbon film 9 1k RD PS 912J R74 Carbon film 9 1k RDXPS 912J R75 Carbon film 2 2M RD PS 225 d 60 Parts List of Tone Switch Circuit Assembly Description SA 9900 Part No R77 R78 R79 R80 R81 R82 R83 R84 R85 R86 R87 R88 R89 R90 R91 R92 R93 R94 SWITCHES Carbon film Carbon film 27k Carbon film 27k Carbon film 2 2M Carbon film 2 2M Carbon film 75k Carbon film 75k Carbon film 33k Carbon film 33k Carbon film 82k Carbon film 82k Carbon film 150k Carbon film 150k Carbon film 51k Carbon film 51k Carbon film 220k Carbon film 220k Carbon film 100k Carbon film 100k Carbon film Carbon film Description RD PS 225 RDXPS 273 RD PS 273 RD PS 225 RDXPS 225 RDXPS 753 RD PS 753 RD PS 333 RDXPS 333 RDXPS 823 RD PS 823J RDXPS 154J RD PS 154 RDXPS 513 RD PS 513 RD PS 224 RDXPS 224 RDXPS 104 RDXPS 104 RDXPS 363 RDXPS Part No OTHERS Rotary switch BASS 100Hz Rotary switch TREBLE 10kHz Rotary switch TREBLE 20kHz Rotary switch BASS 50Hz Description ASD 023 B ASD 024 A ASD 025 A ASD 022 A Part No Boss Washer 9 Nut 9 Internal lock washer ABN 009 0 B22 016 0 B71 004 0 ABE 001 0 59 23 5 co x Cs 415 07 2SC1451P L o 5 2
44. nnect 852 dummy loads between the SPEAKER A terminals as shown in Fig 13 4 Set the SPEAKERS switch to position A Turn on the POWER switch 5 Connect DC voltmeter 100mV full sca le between pins 4 and 5 Adjust VR1 until the voltmeter indicates OV 6 Connect the DC voltmeter between pins 20 and 19 Adjust VR2 until the voltmeter indicates PRE POWER AMP switch QU 0 set to SEPARATED Resistor DC voltmeter POWER IN terminals Dummy load 82 o 23 22 20 18 A 4 2 ol HATA VR4 VR2 VR1 KER DO SOY IS SPEAKER A terminals 20 Power amplifier ass y DDD Fig 13 7 Connect the DC voltmeter between pins 2 and 6 Adjust VR3 until the voltmeter indicates 50m V 8 Connect the DC voltmeter between pins 18 and 22 Adjust VR4 until the voltmeter indicates 50mV 5064 SA 9900 Resistor PRE POWER switch 5 1k2 set to SEPARATED DC voltmeter POWER IN terminals Dummy load 8 Making sure the temperature detecting circuit operates correctly 1 Remove the posistors from the heat sink 2 Check that when the posistors are heated to over 85 C with a hair dryer etc
45. on the chassis Pull up the shield plate Unscrew the two 2 screws which mount the printed circuit board fixing brackets on the chassis Lift up the printed circuit board by turning it with its lower end Unscrew the heat sink top screws and two panel stay screws Remove the left side stay Unscrew the five 5 screws of the panel stay Remove the tone switch circuit as sembly by moving it forward Unscrew the eighteen 18 screws of the panel stay and PHONES jack SPEAKERS selector switch shaft and VOLUME control shaft nuts and washers Remove the switch circuit assembly by inclining the panel stay 2 3 4 5 6 Left Tat X control amplifier 4 1 N Tone switch circuit ass y _ Tone switch circuit ass y E Sy Vete TN d Le 11 d Control amplifier PCB Tone switch circuit ass y Switch circuit ass y Fig 9 Removing the Input Circuit Assembly Fig 10 The PHONO jacks TAPE MONITOR and DUPLICATE lever switches and FUNCTION rotary switch are installed on the input circuit assembly printed circuit board 1 2 3 4 1 2 Remove the top cover front shield cover front panel bottom plate and right side panel Remove the shield case and power supply printed circuit board 2 Unscrew the twenty four 24 screws of the panel stay and PHONES jack and SPEAKERS selector switch shaft and VOLUME control shaft nuts and washers Incline the panel stay
46. ront shield cover pull out the PHONO 2 MIC LEVEL and IMPEDANCE control knobs Unscrew the sixteen 16 screws E Remove the side panel Removing the Left Side Panel output terminal side After removing the top cover and front shield cover unscrew the six 6 screws F Remove the side panel L 13 Top cover A Front shield cover SX Right side stay Right side panel Left side panel a Front panel ass y Fig 5 14 Removing the Power Amplifier Printed Circuit Board Assembly Fig 6 1 2 3 4 5 After the top cover and bottom plate have been removed the power amplifier can be adjusted The power transistors can be replaced by pulling the transistor covers out of the heat sink guides and unscrewing their two screws Unscrew the posistor fixing screws located at the lower part of the center of the heat sink Loosen the varistor fixing screw at the upper part of the center of the heat sink Remove the varistor Stand the main body on the bottom plate so it is not touching the bench Unscrew the eight 8 screws at both sides of the heat sink This allows the power amplifier printed circuit board to be turned forward Unscrew the four 4 printed circuit board fixing screws and screws A and B This allows the printed circuit board to be removed from the heat sink After this has been done amplifier can be checked Heat sink Posistor
47. s SA 9S900 Removing the Protection Printed Circuit Board Assembly Fig 7 1 2 Remove the top cover front shield cover bottom plate and left side panel Unscrew the two screws mounting the printed circuit board fixing brackets on the chassis This permits the printed circuit board to be inclined to an angle depending on the length of the lead wires Fig 6 Fig 7 15 Removing the Power Supply Printed Circuit Board Assembly 1 Fig 8 1 Remove the top cover front shield cover and bottom plate This allows the 1A protection fuse F4 in the pilot lamp system to be replaced Unscrew the two 2 screws which mount the printed circuit board on the chassis This allows the printed circuit board to be moved though the distance is limited by the length of its lead wire 2 Removing the Power Supply Printed Circuit Board Assembly 2 Fig 8 1 Remove the top cover front shield cover and right side panel Remove the shield case Pull up the printed circuit board from the bosses Be careful not to touch the volume control assembly against any other part 2 Shield case Power supply PCB 2 16 Removing the Control Amplifier Printed Circuit Board Tone Switch Circuit As sembly and Switch Circuit Assembly 1 Remove the top cover front shield cover front panel and left side panel Unscrew the three 3 screws which mount the control amplifier printed circuit board shield plate
48. tions to detect DC voltages in the power amplifier output circuit and power transistor overloads and overcurrents to mute click noise produced by turning the POWER switch ON or OFF and to prevent abnormal over heating of the power transistor heat sink When any of these is detected the protection circuit operates the relay connected to the power amplifier output circuit to interrupt the speakers Particularly for the muting pre venting click noise a fieldeffect transistor muting gate is placed on the input side of the power amplifier so that the power amplifier input signal can be interrupted at its input side This makes sure that the relay contacts turn on or off without sparks because there is no output signal thus preventing deterioration of the relay contacts and improving the reliability of relay operation 48V Zin 1 7 22k Vos INPUT 4 10 3600P 1000 IK o 48V Fig 1 Circuit Diagram of Equalizer Amplifier 11 Heat Sink Over heating Prevention Circuit If the SA 9900 is operated continuously at full power with a 40 load the power transistor heat sink temperature increases greatly Excessively high heat sink tempera ture is dangerous if touched etc as it is exposed on the rear panel No problem is practice For safe handling this model is provided with a heat sink over heating prevention circuit which maintains the heat sink temperature below 85 C The
49. und 0 5 RT5B OR5K Wire wound 0 5 RT5B OR5K Wire wound 0 5 RT5B ORSK Wire wound 0 5 RT5B OR5K Wire wound 0 5 RT5B OR5K 44 Parts List of Power Amplifier Assembly SA 93900 Symbol Description Part No R66 Wire wound 0 5 5W RT5B R67 Wire wound 0 5 5W RT5B OR5K R68 Wire wound 0 5 5W RT5B OR5K R69 Metal oxide film 10 2W RS2P 100J R70 Metal oxide film 10 2W RS2P 100J R71 Metal oxide film 10 2W RS2P 100J R72 Metal oxide film 10 2W RS2P 100J R73 Carbon film 22 RD 4PS 220J R74 Carbon film 22 RD PS 220 R75 Carbon film 22 RD PS 220 R76 Carbon film 22 RD PS 220J R77 Carbon film 22 RD PS 220J R78 Carbon film 22 RD PS 220J R79 Carbon film 22 RD PS 220 R80 Carbon film 22 RD PS 220 R81 Carbon film 24k RD PS 243 R82 Carbon film 24k RDXPS 243J R83 Carbon film 470 RD PS 471J R84 Carbon film 330 RD PS 331J VR1 Semi fixed 2 2k B 041 VR2 Semi fixed 2 2k B 041 VR3 Semi fixed 470 B ACP 040 A VR4 Semi fixed 470 B ACP 040 A SEMICONDUCTORS Symbol Description Part No 01 Transistor 2SA726S G or F 2547635 6 or 5 Q2 Transistor 2SA726S G or F 2547635 6 or 5 03 Transistor 2SA726S G or F 2547635 6 or 5 04 Transistor 2SA726S G or F 2547635 6 or 5 Q5 Transistor 2SA726S G or 2SA763S 6 or 5 06 Transistor 2SA726S G or F 2547635 6 or 5 07 Transistor 28C1451 V or 08 Transistor 2SC1451 V 09 Transistor 2SC1451 V or 010 Transistor 28C1451 V or 0

Pioneer SA-9900 User's Manual

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