National SG-970A User Manual Download

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Summary of Contents for SG-970A

Page 1: ...nV m 50mwWw 2SC829 DC Amplifier Power Output 5W 5SW MPO IHF 2SB178 DC Switching Power Source AC 110V 125V 210V 240V 2SA564 1st AF Amplifier left 50 60 Hz 2SA564 1st AF Amplifier right Speakers Two 16c...

Page 2: ...ee ees 3 DIAL CORD STRINGING GUIDE 0 056 ci derncisie eo 6 epee te 6 ene ee wae Ree TEES 4 PARTS IDENTIFICATION 4 sc 2 corse fo Som ieie Sayers see a Bete A ee We ee SIE See ee 2 4 6 7 SCHEMATIC DIAGR...

Page 3: ...SJJ 40 FM Feeder Line Voltage SHR 404 Selector A f RSR 26 Screw No 2 Rubber Legs Screw No 1 Top Cover SHG 314 Bottom Cover Top Cover Mounting SKF 1200 Mounting Side Panel Indicator Complete L Label A...

Page 4: ...ve procedure To Remove Record Changer Refer to Figs 3 7 1 Remove four 4 bottom cover mounting screws Nos 1 4 as shown in Fig 3 on page 1 2 Unplug receptacle housing from plug housing as shown in Fig 7...

Page 5: ...Moujting Notes To Mount Dial Pointer R as one He _ _ Vin eeed Holder SUS 14 1 Tuning capacitor should be positioned at minimum capacity open 1 Set tuning capacitor to fully closed position Dial Spring...

Page 6: ...ower Source Switch in OFF position Shut Off Switch in OFF position Power Source Voltage Selector in 110V position Du 13 20A90_x 4 L R DET OOO89 135 55 18 19 48 107 21 20 22 5 5 DC voltages measured wi...

Page 7: ...MODEL SG 970A PARTS IDENTIFICATION S A 2 8 fod 25 OF aan Ss 1 To Cc eal a BY 190 nS las we itis TF of es wie me 24 C a 8D Sa Oc Z O coy Fig 15 IF FM AM AND MULTIPLEX SECTION...

Page 8: ...MODEL SG 970A PARTS IDENTIFICATION OS TE 8 BOY OCB Me Fig 16 AUDIO SECTION _ 7J...

Page 9: ...QOGreen Sl mill Ti Bal i Ie ed fe Wi 2 Green Gi _ Red Lo Yellow Fower Source Sefector 19 TR10 TRil TR8 rm FMsTeREO _ rm rmsterco _ c 0 08V Zz 2V c 5 9V ev c tiv 026v clo B 4 5V B 3V B 24v 0 27v B ov 0...

Page 10: ...1 4V E 0 48V Ic 5mA lc 5mA Ic 1 4mA Ic 1mA Ic 0 3mA 0 3mA Ic 1 4mA Ie 1mA Viotd Jeg o7 0 ST astue 1 Contr ja Wy 4 Vez AOR Lee rail TRB FM em STEREO c 5v 5V B 2v 2 4V ole E 1 8Vv 1 8V Va Ic 0 3mA 0 3m...

Page 11: ...0 kHz on scope to point TP2 T3 FM 3rd _IFT pe RLOD SWP on about Common to chassis T5 FM 4th IFT linearity between Common to chassis 98 MHz T7 EM Disc IFT 100 kHz markers as Refer to Fig 18 os ee Adjus...

Page 12: ...cated before leaving the factory after prolonged use it is advisable to relubricate certain parts A medium grease should be applied to the points as shown in Fig 27 ADJUSTMENT Stylus Set Down During a...

Page 13: ...REPLACING CARTRIDGE FRONT VIEW Reject Lever Pickup Arm Height Adjustment Screw Stylus Pressure Adjustment Stylus Set Down Adjustment Fig 24 PICKUP ARM ADJUSTMENT Fig 26 REPLACING STYLUS BACK VIEW Gre...

Page 14: ...Gear Assembly 1 18 FU JBS138 Nut Pickup 1 19 EPU 13TTCD Pickup Arm Assembly 1 20 FU PWFO055 Washer Pickup 2 21 FU ETA1 13 Record Support Arm Assembly 1 22 FU NPAO12 Actuating Slide Assembly 1 23 FU R...

Page 15: ...minal FU ETA133 Socket Holder Assembly FU PWM059 Washer FU ETA108 Pickup Plate A Assembly FU JIKO60 Pickup Arm Raising Spindle Ass y FU BCP055 Magnet Actuating Slide Spring Pickup Plate A FU BTNO084 S...

Page 16: ...3 14 2SA564 DC Amplifier DC Switching 1st AF Amplifier L R TR15 16 2SA173 TR17 18 TR19 20 TR21 22 23 24 2SA173 2nd AF Amplifier L R 3rd AF Amplifier L R 2SB176 4th AF Amplifier L R 2SB473 Power Output...

Page 17: ...MODEL SG 970A EXPLODED VIEW OF RECORD CHANGER 47...

Page 18: ...111 113 PART NO ERD 14VJ122 REPLACEMENT PARTS LIST Cont d 1 2kQ DESCRIPTION 1 4Watt 5 Carbon PER SET pes 6 REMARKS IF AF P S 6 R23 ERD 14VJ182 1 8kQ 1 4Watt 5 Carbon 1 R4 35 45 46 52 82 83 98 99 ERD...

Page 19: ...800pF 50WV 5 Styrol C23 33 ECQ S05271JZ 270pF 50WV 5 Styrol 2 2 C40 44 ECQ S05472KZ 4700pF 50WV 10 Styrol C47 48 ECQ M05222MZ 0 0022uF SOWV 20 Polyester 2 2 C42 56 57 ECQ M05103MZ 0 01uF 50WV 20 Polye...

Page 20: ...ass Control Left Right VR8 R37 EVL SOAA00B13 1kQ FM Separation Adjust VARIABLE CAPACITORS ECV 5XR27B18S ECV 1ZW10P12 ESR E245F30AE Tuning Capacitor Trimmer Capacitor SWITCHES Band Selector Switch EVQ...

Page 21: ...EXPLODED VIEW OF CABINET 2 x B as oc 5 2g Q o 2 Si E EE 8 _ top 8x o oo wy 2 onl a Sm a oN a2 O oD 35 52 8 Sy oo La c 6 se ie OF S o Oe e a2 o n n x a i a 5 8 0 a D Ww i x o a wr Be 82 nL zy N io a S...

Page 22: ...10 SGX 512 SGX 514 Trim A Speaker System Trim B Speaker System Right Trim C Speaker System Left SKD 2560 Dial Plate SBN 298 Knob Tuning SBN 300 Knob Band Selector o MODEL SG 970A PART NO SBN 302 REPLA...

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