SERVICE MANUAL
Contents
1. 1 4W 3 3 1 102 1 2W J 1KQ 1OTW 22 47uF 470uF 16TW 10 16TW 470uF 25TW 1uF 25TW 4 7 25TW 10uF 25TW 47uF 25TW 100uF 25TW 4 70 35TW 47uF 35TW 220 35TW 47 35TW 1000 SOTW 0 33uF SOTW 0 22uF SOTW SOTW 0 47uF ECN C4A103M HE13SJYF473Z HE13SJYF473Z HE40SJSL560K HE40SJYB101K HE50SJSL101K HE40SJYB151K HF 70SJSL201K 50V 0 0022uF 50V 0 0033uF 50V 50V 0 01 5yF J 50V 0 033uF J 50V 0 001 uF K 50V 0 004 7pF K 50V 0 047uF 50V 0 068uF 50V 0 0 J 1333 2 50V 0 0047 J or 1472 2 7 D Fuse 0 315A Fuse 0 5A Fuse Holder Fuse Holder Metal Film Metal Film Carbon Electrolytic Electrolytic Electrolytic Electrolytic Electrolytic Electrolytic Electrolytic Electrolytic Electrolytic Electrolytic Electrolytic 139 Electrolytic Electrolytic 13 Electrolytic 16 Electrolytic 189 Aluminum Aluminum Aluminum Aluminum Oil Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Mylar Mylar Mylar Mylar Mylar Mylar Mylar Mylar Mylar Mylar or Polypropylene Mylar or Polypropylene FILTERS Filter Block F701 702 FUSE amp FUSE HOLDERS FU 523115T FU 525015T FU101 102 FU103 104 801 FU12. 211 196 4 lt SVR4 1 SVR3 BIAS SVR 2 SVR 1 NORMAL PEA 286 SVR701 L R756 9 708 SVR702 R TP705 703 5 705 O 710 SVR706 706 704 R702 TP702 L704 R BIAS TRAP CASSETTE WITH DOLBY NR BOARD DCA 196 982 W3d wilZ 09 9S0 518 01 4 793 411405 OL 61 18 01 gt 9 v k poon gt Fs gt x 7 9 0 J a o x SHINJON J t 2 gt 3 0 021 211211 Be Ge ho Fs ey as RE mre ete 2 r 982 734 624 14406 3 04 OL 9 6 0 6 6 94 5 45 777 Te 992 4 824 4844 03 11406 YIMOd 6 POWER SUPPLY 8 BOARD PEA 286 TO DIN AMP TO MIC AMP TO RECORD LAMP 190 191 191 146 5 45 6 902 34 Ro g HEADPHONE PCB CHP 193
3. TO RECORD gt 4 Ela 1 2 TO 196 22 s Cip CHERE 5 TO VU METER REL 146 DE TO DIN 190 ee eee DIN AMP BOARD DRA 190 TO MIC AMP 191 AMP BOARD 191 VOLUME CONTROL 193 POWER SUPPLY EQ amp AMP 286 TO DIN AMP 190 POWER SUPLLY EQ amp AMP PCB PEA 286 TO POWER SUPPLY EQ AMP PCB 286 BIAS OSC BOARD CO 211A TO CASSETTE AMP WITH DOLBY NR 196 TO CASSETTE AMP WITH DOLBY NR PCB DRA 196 TO ERASE HEAD lt CIRCUIT DIAGRAM Fr pe Sr LIME INPUT OIN INPUT LCH R675 270K R674 2 2M C664 2541 INPUT C607 259 100 R672 560 8679 56K R680 56K NORMAL 05 56K METAL 3 5105 DIN OUTPUT LINE 9 lt 22 685 4 7K 22 om sj Rey S 22K 4271 ai DOLBYHR 4 7K Th _ ls AMPIMIA 191 eye DIN 08 190 717 Tti LCH REC IW R737 180 R 09 7 25141 C163 250100 17707 548708 110 cw
4. 105 2 2 2 109 496K 8755 100K C735 873 C761 700 R163 270K 8710 27K 708 518706 704 1 cno 20K8 00033 2 108 2511 0702 2561321 0 001 184003 R 101227 8746 56K CM R744 R756 100K R776 117 164 0047 CASSETTE WITH DOLBY NR 196 1751 15 8 ERACE HEAD 1070 702 PIN YOITAG VOLT 08 Peto 03 14 15 16 57014712 580 17 5 65 5101 510347105 BIAS OSC 0 211 POWER SUPIIY L 286 109 19 STOI STI2 RECORD PLAY SW PLAY METAL _ 5801 POWER D0LBY NR SWC 192 al 5 S103 SELECTER 5 0 EXTRA 5184 145 gene 5601 602 DIN RCA AUTO SW RCA 5 5502 0705 0 SYRI 100KB l NORMAL 99 0 9 50 2 Toon 2 1 1 4 41 eeu REC EQ RCH REC 10 03 280 1327 an 53 1 RCH 150 2 41 H i HEAD PHON
5. Germanium Diode 01 2 5 6 20 90 8 Silicon Diode D101 104 or 10E1 2 210 Zener Diode D106 GL 9PR2 LED LD701 151555 Silicon Diode D3 4 or MA150 or DS442 CONTROLS Carbon Trimmer Carbon Trimmer Carbon Trimmer Carbon Trimmer Carbon Trimmer 1 8 2 8 20 8 8 100 8 5 701 702 SVR3 4 SV R705 706 SVR2 SVR707 708 1 EWK HWA332A 24 VR201 EWK G4A332703 VR202 COILS amp TRANSFORMERS Potentiometer Potentiometer 1 5mH Inductor L751 4 7 Inductor L1 2 184003 Bias Trap Coil 1703 704 0504 012 OSC Block NPT 0715 Power Transformer SW 1501037 ESB 70294 ESD 81559 5 Key Push SW Power Switch Slide Switch HLJO307 01 020 HLJ0337 01 030 323HDS Headphone Jack Mic Jack Terminal Block 001 Terminal Pin CS728 1 2 8 Hole DIN Socket N41572 DIN RCA4P Socket 5 107 5 5 Pin 5 6 Pin Ass y 6 Pin Micro Connector 55 7 Micro Plug 5 06 051 MC06 052 07 050 171825 5 171825 6 Micro Plug 6 Pin 171825 7 Micro Plug 7 Pin SR 3P 4 Cord Bush PC 002 RCA Pair Cord ACC 010 Line Cord FB2085A FUH 001 5 5053
6. Cord Pulley Ass y 1 X5750 Button Side LA 1 0690 Rew Idle 1 X5760 Head Panel Pushing Plate H 2 K 1890 Chassis Ass 1 X5780 Case Lock Arm A 1 1920 Sensor Arm 1 X5790 Flywheel Support N 1 K 1930 Lock Plate 1 X5800 Spring Plate R Holding Pack 1 K 1950 Rew Idler Arm 1 X58 10 Motor Bracket M 1 K 1960 Eject Arm 1 6100 Soft Ajast Plate 1 K 1970 Pause Arm 1 X6150 Res Arm D 1 K 1980 Play Arm 1 K 1990 TU Lever 1 01144 Head Screw 2 6 x 3 K 2000 Reel Base 1 01146 Pan Head Screw M2 6 x 5 2 K2010 Head Panel Ass 1 04145 Flat Head Screw M2 6 x 4 3 2070 Soft Damp Plate 1 04166 Flat Head Screw M3 x 5 2 0240 Eject Cord 1 08087 Pan Head Screw M2 x 6 Bind 3 Q0240 R P Head Spring B 1 17166 Pan Head Tapping Screw 6 Q0870 Rew Reel Spring B 1 x5 01740 Pinch Roller Spring 1 19086 Pan Head Screw 2 5 W Spring Washer Q1760 TU Lever Spring A 21 19145 Pan Head Screw M2 6 x 4 Q1780 Rec Sensor Spring F 2 W Spring Washer Q1790 Rec Arm Spring A 1 19146 Pan Head Screw M2 6 x 5 Q1800 Rew Arm Spring C 1 W Spring Washer 01810 Play Arm Spring 1 19151 Pan Head Screw M2 6 x 10 01820 Stop Arm Spring 1 W Spring Washer 1830 Pause Arm Spring 1 19166 Pan Head Screw M3 x 5 01840 FF Arm Spring 1 W Spring Washer 01850 Pick Up Lever Spring E 1 20148 Pan Head Screw M2 6 x 7 01870 Eject Lever Spring N 1 W Flat Washer Q1880 Rew Lever Spring C 1 21005 Pan Head
7. Screw M2 x 4 01890 Pause Cam Spring 1 W F lat Washer Q1900 Switch Arm Spring A 1 27026 Spring Washer M2 6 3 Q1910 FF Lever Spring C 1 30126 Flat Washer M2 6 2 Q1920 Case Lock Arm Spring A 1 30130 Flat Washer M3 1 01930 Head Panel Spring 1 32003 Poly Slide Washer 2 0 251 1 Q2130 Eject Cord Spring D 1 32004 Poly Slide Washer 6 0 1 01 2 Q2250 Eject Arm Spring A 1 32202 Poly Slide Washer 2 x 0 25 4 50360 Leaf Switch 1 32252 Poly Slide Washer 2 5 x 0 25 1 00340 Rubber Cushion 3 32602 Poly Slide Washer 0 25 1 00600 Polyacetall Screw 1 36015 Ring 1 5 3 U1100 Rec Sensor 1 1 36025 Ring 2 5 5 01120 Cassette Guide 2 36040 Ring 4 0 2 U1190 Sensor 1 36050 5 0 1 91230 1 36215 Ring 1 5 Black 2 91250 1 42025 Steel Ball 2 U1330 Drive Belt 1 PARTS LIST sts Q ty INTEGRATED CIRCUITS amp TRANSISTORS 7 701 702 25 1327 5 Transistor Q1 4 601 602 or 2SC693 G 653 654 701 or 2SC1571 G 702 250612 K Transistor Q101 or 2SC2209 R S 2SC536A UD F 25 1684 250592 5 651 652 705 706 Q5 6 103 Transistor Transistor 25 1685 07 8 2SC536AUD 25 1684 Transistor 09 25 838 25 536 25 945 15188
8. 04 FU101 103 801 METERS R715 716 R102 R776 C711 712 C29 110 C719 720 C701 702 703 704 717 718 741 742 747 748 C109 C707 708 715 716 725 726 663 664 667 668 C1 2 5 6 7 8 9 10 13 14 15 16 17 18 601 602 605 606 735 736 745 746 C669 C729 730 C607 763 C111 C767 C107 C108 C106 C733 734 C743 744 C731 732 C11 12 C801 802 C764 766 C101 104 C3 4 C603 604 C705 706 C771 772 C761 762 C19A 20A 709 710 723 724 19 20 727 728 749 750 21 22 25 26 23 24 27 28 713 714 721 722 2 2 3 N APPEARANCE PARTS CASSETTE PARTS 10153 Front Panel 1 N41538 SSR Cass Key Cap Red N20597 2 Rear Panel 1 N30204A Cass Button N41 756 GY T Side Cap 2 N41841 DB Cass Display Plate N42052 SS Push Button 6 N41380 Decoration Screw N41660 Knob 44 1 N40271 Cass Mirror N41661 Knob 21 1 N42034 DB Cass Plate N20575 S Case 1 No 7102 Foot 4 PACKING MATERIAL amp MISC 41318 Bag For Unit N40487 Bag For Inst Book N20577 Pad Land R CASSETTE PARTS CT 3709B Cass Mechanism See page 11 13 N20315 Cass Holder N42121 Inner Carton N30215 Holder Rear Base N42122 Outer Carton N41110 Cass Window N42156 Pad N41109 Counter Window N20574 Bo
9. 4 2 04145 01166 A 2 3 2 7 2 25 2 4 01980 7 17166 30130 gt 2 gt gt vavo PARTS LIST CASSETTE MECHANISM CT 3709B NOTES 1 Part orders must contain Model Number Part Number and Description 2 Ordering quantity of screws and or resistors must be multiple of 10 pcs n fe Part No Description Q ty Description Q ty A0230 Soft Damp 1 V2910 Spring Tube 3 BO680 Pinch Roller Ass y 1 V3870 Sensor Arm Spacer 1 BO690 TU Idler Ass y 1 V4140 Case Lock Arm Collar B 1 BO700 FF Idler Ass y 1 V4170 Motor Pulley 1 0710 Supply Reel 55 1 4190 Collar A 1 0720 Up Reel 55 1 4250 Button Shaft 1 C0330 MP 390 323 Counter 1 V 4520 Rec Arm Collar 1 20120 Flywheel 1 1 1990 Head Washer 1 0230 2331 0110 1 5350 Lug Terminal 1 0320 H53203 05 Erase Head 1 X5550 Rew Lever 0 1 G1240 Cassette Button 6 5560 FF Lever 0 1 61290 Shield Wire Double 280 1 X5590 Pause Cam C 1 G1300 Shield Wire Double 220 1 X5640 FF idler Lever A 1 G1310 Shield Wire Single 280 1 X5700 Switch Arm A 1 G1320 Cord Hook 1 X5720 Rew Arm D 1 G1330 MMI 6A2LK Motor 1 5730 0 1 40560 Flywheel 1 1 5740 Stop Arm 1 40670
10. E HP 193 250592NC 1 3 Ay 6220 i 2SC536 H 2 154 ORANGE 0 01 01 C101 10101 13166 C108 254470 C106 3511000 gt g 0102 DIO 67088 KI 0104 57089 Fuad 1500 mA 802 SHASSY POWER TRANCE 5802 O EARTH sw e 0715 12 5110 5799 5708 5707 5706 5705 5704 5703 5702 5701 5701 088 06B o od oF REC PLAY SW LAMP INCLUDE VU METER 10154112 REC PLAY SW PLAY 5802 MOTOR SW 101 POWER SW OFF 601 602 OIN RCA AUTO SW RCA 101 DOLBY NA SW 102 MPX SW OFF gt DRAWING NO 103 105 SELECTER SW METAL 19146 32252 4 0120 61320 11 vas20 2 2 amp lt 3 K1970 Ra 01830 7 1980 01810 12 EXPLODED DIAGRAM CASSETTE MECHANISM CT 3709B 9 2 1 353 80720 0 PP x5350 ga m x5760 01144 S _ 27026 5760 4 01146 1 01120 1 20
11. SERVICE MANUAL FD 760 Stereo Cassette Deck SPECIFICATIONS Track System 4 track 2 channel stereo recording and playback 1 7 8 i p s 4 75 cm sec 0 1 WRMS Tape Speed Wow and Flutter Frequency Response 50 17 000 Hz Metal tape 50 16 000 Hz tape 50 14 000 Hz Normal tape Dolby NR off Signal to Noise 53 dB Dolby NR off CrO or Metal tape CCIR ARM weighted 400 Hz The S N is improved by 9 dB with Dolby NR on Total Harmonic Distortion Erase Ratio Fast Forward and Rewind Time 1 8 at 1 kHz 0 VU 65 dB at 1 kHz O VU 10 90 second C 60 tape Input Sensitivity Impedance 0 3 mV 4 7 kohms 40 mV 8 2 kohms 0 5 mV 3 3 kohms Output Level at Dolby level GENERAL Power Consumption Power Supply Dimensions Weight Net Accessory 15 watts AC 220V 50 60 Hz 442 W x 297 D x 133 H mm 5 kg 11 Ibs Shielded Audio Cables 2 Specifications and design are subject to change without notice FRONT VIEW VU meter Cassette Holder Knob 44 KL 258T 6 N20315 N41660 Push Button x 6 Cassette Key Cap Cassette Key Cap 5 Knob 21 N42052 SS N41538 SSR N41538 SS N41661 Case N20575 S w 99 ob Foot Bottom No 7102 N20574 ALIGNMENT PROCEDURE For Alignment points see 5 Set the position of Rec Volume to Max and of Bal Volume Bias Adj to Center in all alignment 1 Head Azimuth OUTP
12. UT R P HEAD PLAY AMP DOLBY AMP LINE OUT CEE Controls to be positioned Test Tape Procedure Dolby NR MTT 114 1 Adjust the head mounting screw in order to MPX obtain indication Function PLAY VU METER a LINE IN DOLBY AMP METER AMP 400Hz 2dB DOLBY LEVEL CONFIRMED OUTPUT VOLTAGE 100mV Procedure Dolby NR 1 Apply 400 2 approx 4 signal at the LINE MPX terminal Tape Selector NORMAL 2 Make the voltage at TP705 and 706 be 100mV Function by adjusting applied signal level GND 710 3 Set the VU meter indication to DOLBY LEVEL 2dB double D mark position by the adjustment of SVR811 and 812 3 Play Back Level V M 100mV OUTPUT VU METER PLAY AMP DOLBY AMP METER AMP R P HEAD ADJ TP705 706 Dolby NR OFF 150 Adjust 5 701 702 to make the output voltage at Dolby testpoints of 705 706 be Tape Selector NORMAL 100mV GND 710 Function PLAY ALIGNMENT PROCEDURE 707 708 i Voltaae RECORD EQ AMP BIAS OSC APPROX 60KHz 4 Bias Trap Bias Voltag HERG 109 7 ADJUSTMENT BIAS TRAP Controls to be positioned Test Tape Procedure Dolby NR OFF Blank Adjusting L703 704 to min indication on the MPX OFF scale at the Test point of 707 and 708 Se
13. lector METAL GND TP709 Function ADJUSTMENT BIAS VOLTAGE Dolby NR MPX OFF 1 Connect V M across 701 703 702 704 SVR707 708 Approx Voltage Tape Selector Tape Selector gt METAL METAL SVR2 1 NORMAL 3 8 mV SVR1 NORMAL NOTE The Bias Voltages indicated in the above table do not necessarily correspond to the best recording character istics of dynamic range distortion frequency response etc Make some adjustments according to the best values actually obtained 5 Recording Level Caliblation ADJ DOLBY AMP RECORD EQ OSC 00 705 706 Dolby NR 1 Apply 400Hz approx 40mV signal at the OFF LINE IN terminal Tape Selector NORMAL 2 Make the voltage at TP705 and TP706 be 100mV by adjusting applied signal level GND TP710 3 Set the SVR705 and 706 to the mechanical center 4 Record the signal into the test tape 5 Play the recorded signal and check the output voltage at 705 706 being either 100 or not If not adjust SVR705 and 706 and then repeat step 4 and 5 untill 100mV is obtained 5 1707 R755 R745 REC PLAY LEVEL BIAS METAL SVR707 PLAY BACK LEVEL SVR708 R
14. ttom Chassis N40769A Sheet for Cass Holder Cass Key Cap N41471A Heat Sink OM 237 Instruction Book N41538 SS NOTE 1 Part orders must contain Model Number Part Number and Description 2 Ordering quantity of screws and or resistors must be multiple of 10 pcs 3 Resistors not detailed in parts list are all carbon type 1 4 watt with regard to the value refer to the schematic diagram 15
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