SERVICE MANUAL - Pdfstream.manualsonline.com
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1. 6 2 PRINTED WIRING BOARDS 1 2 3 4 6 7 8 9 10 11 12 13 14 15 J101 J102 MIC EAR PLUG IN POWER A MAIN BOARD COMPONENT SIDE MAIN BOARD CONDUCTOR SIDE 104 Wise OFF L H B 9 9 REC PB 3 Gage pd Rios 0148 Rio R10 ed e a o tut 2 C145 2 4 2 8 R134 RS 1 cj HRP901 REC PB HEAD D D HE901 ERASE HEAD E 16 i R603 F 102 POWER DRYBATTERY e 7 SUE was iud 5 IEC R06 C129 8 CONTROL G SP901 SPEAKER H Semiconductor Location Location Location ASTA EER A 13 G 6 SW BOARD J Note on Printed Wiring Boards e o parts extracted from the component side parts extract2. DIAGRAMS 6 1 Block Diagram eee 6 2 Printed Wiring Board 0 2 6 3 Schematic Diagram EXPLODED VIEWS ELECTRICAL PARTS LIST SAFETY RELATED COMPONENT WARNING COMPONENTS IDENTIFIED BY MARK OR DOTTED LINE WITH MARK ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB LISHED BY SONY ATTENTION AU COMPOSANT AYANT RAPPORT LA S CURIT LES COMPOSANTS IDENTIFIES PAR UNE MARQUE A SUR LES DIAGRAMMES SCH MATIQUES ET LA LISTE DES PIECES SONT CRITIQUES POUR LA S CURIT DE FONCTIONNEMENT NE REMPLACER CES COM POSANTS QUE PAR DES PIECES SONY DONT LES NUM ROS SONT DONN S DANS CE MANUEL OU DANS LES SUPPL MENTS PUBLI S PAR SONY SECTION 1 SERVICING NOTES In this set the 5102 POWER detects REC PLAYBACK on It is mounted on the MAIN board and therefore the REC PLAY 2 BACK on cannot be detected with the MAIN board removed When making an operation check and voltage check of mechani 3 cal deck with the MAIN board removed fix the 102 at turn on MAIN BOARD Conductor Side B 19 AS g S102 Flexible Circuit Board Repairing Keep the temperature of the soldering iron around 270 C dur ing repa
3. O Monaural microphone 1 Super directional microphone 1 Qr e Carrying pouch 1 O Hand strap 1 o o o o attached to the unit Battery life Approx hours EIAJ Playback Recording Sony alkaline LR6 SG a Sony R6P SR 3 3 Sony rechargeable battery 3 3 NC AA fully charged TCM 22DV only Measured value by the standard of EIAJ Electronic Industries Association of Japan Using a Sony HF series cassette tape and playing back with speakers Note The battery life may shorten depending on the operation of the unit For maximum performance we recommend that you use alkaline batteries House Current see Fig 3 9 Connect the AC power adaptor to DC IN 3V and to a wall outlet The AC power adaptor is supplied only with the TCM 22DV For other models use the AC E30HG AC power adaptor not supplied Do not use any other AC power adaptor Polarity of the plug Note Specifications for AC E30HG vary for each area Check your local voltage and the shape of the plug before purchasing Design and specifications are subject to change without notice CASSETTE CORDER e ON Y TABLE OF CONTENTS SERVICING NOTES GENERAL er Rees DISASSEMBLY MECHANICAL ADJUSTMENTS ELECTRICAL ADJUSTMENTS
4. 831 441 11 CUSHION CABINET UPPER 10X7X0 5 SW BOARD SPEAKER 3 6cm MICROPHONE ELECTRET CONDENSER 2 MECHANISM DECK SECTION 1 MT 20DV 118 62 63 Y HRP901 4 not supplied LEVER 2 ASSY PINCH BUTTON FF P BUTTON REW 44 BUTTON PLAY B BUTTON REC 6 BUTTON STOP SPRING AZIMUTH COMPRESSION SCREW M1 4X1 8 LOCKING SCREW 1 4 SPECIAL SCREW M1 4X3 8 SPRING IDLER COMPRESSION Ref No Part No Description 51 X 3377 250 1 52 3 925 146 01 53 3 925 147 01 54 3 925 148 01 55 3 925 145 01 56 3 924 738 01 57 3 703 925 21 SCREW M1 4 58 3 924 625 01 LEVER HEAD 59 3 924 645 01 BRACKET HEAD 60 3 924 685 01 61 3 704 197 91 62 3 375 135 01 63 3 376 177 01 64 3 925 107 01 65 3 924 637 01 GEAR FF 66 3 924 673 01 GEAR S REEL M901 N 78 Remark Ref No Part No Description Remark 67 3 924 674 01 SPRING B T COMPRESSION 68 3 924 641 01 GEAR T REEL 69 3 924 726 01 SPRING M GROUND TORSION 70 3 907 943 01 BELT CAPSTAN 71 3 925 109 01 CUSHION MOTOR 72 3 925 108 01 SCREW MOTOR 73 3 924 644 01 SPRING POWER TENSION TENSION 74 3 348 160 11 SCREW M1 4X1 6 PRECISION PAN 75 3 927 754 11 CUSHION M 76 3 831 441 99 CUSHION TT 3 030 766 12 SHEET MOTOR 78 3 561 685 01 SHEET C INSULATING HE901 1 500 515 11 HEAD MAGNETIC ERASE HRP901 1 500 073 51 HEAD MAGNETIC RECORD PLAYBACK M901 1 763 453 21 MOTOR DC CAPSTAN
5. Part No Description Remark THP601 1 810 007 11 THP602 1 809 350 21 THERMISTOR THERMISTOR POSITIVE THERMISTOR NTC 2125 EEEE E 1 676 967 11 5601 1 571 277 51 SW BOARD HEH A a a a a lt SWITCH gt SWITCH SLIDE REC TIME ACR ACR 901 HRP901 M901 MIC101 SP901 1 500 515 11 1 500 073 51 1 763 453 21 1 542 136 11 1 505 838 11 MISCELLANEOUS SEACH HH HH a He HEAD MAGNETIC ERASE HEAD MAGNETIC RECORD PLAYBACK MOTOR DC CAPSTAN REEL WITH PULLEY MICROPHONE ELECTRET CONDENSER MIC SPEAKER 3 6cm RHR oo a a oa aa ACCESSORIES amp PACKING MATERIALS A 1 528 405 31 1 542 307 11 1 693 073 21 1 756 035 31 3 044 622 01 3 868 083 11 3 868 083 21 3 868 083 31 3 868 083 41 3 868 083 51 3 868 083 61 3 868 083 71 3 868 083 81 3 868 083 91 8 814 296 90 ADAPTOR BATTERY CHARGE BCA 35E 22DV MICROPHONE ECM J2SL 21DV ADAPTOR AC AC E350 22DV BATTERY PACK NC WMAA 22DV POUCH CARRYING 21DV MANUAL INSTRUCTION ENGLISH FRENCH SPANISH US Canadian MANUAL INSTRUCTION ENGLISH SPANISH PORTUGUESE E MANUAL INSTRUCTIO GERMAN ITALIAN HUNGARIAN 21DV E MANUAL INSTRUCTIO FRENCH GERMAN ITALIAN
6. REEL WITH PULLEY 3 MECHANISM DECK SECTION 2 MT 20DV 118 113 110 111 109 116 114 porte MR 1 127 1 OA 107 101 120 de 19 supped Xd T 2 115 SN SS DN eos E 122 0 128 S 129 125 Ref No Part No Description Remark Ref No Part No Description Remark 101 3 321 483 11 RING RETAINING 0 25 116 3 924 633 01 SPRING STOP TENSION 102 3 315 495 31 WASHER 117 3 924 622 01 LEVER STOP 103 X 3370 384 1 FLYWHEEL ASSY 118 3 924 643 01 SPRING PR TORSION 104 3 924 623 01 LEVER PLAY 119 3 924 684 01 SPRING LOCK PLATE TENSION 105 3 924 621 01 LEVER REW 120 3 924 619 01 LEVER SW 106 3 924 620 01 LEVER FF 121 3 924 639 01 LEVER CR 107 X 3370 388 1 TABLE ASSY FELT 122 3 924 618 01 LEVER LOCK 108 3 924 642 01 SPRING FR TORSION 123 3 925 208 01 SPRING REC TENSION 109 3 924 629 01 LEVER DETECTION 124 3 924 624 01 LEVER REC 110 3 925 207 01 SPRING S OFF TENSION 125 X 3372 155 1 CHASSIS ASSY 111 3 924 630 01 LEVER S OFF 126 3 924 613 01 GEAR FR 112 X 3370 387 1 LEVER ASSY IDLER 127 3 024 378 01 SPRING FR LEVER TORSION 113 3 924 682 01 BELT FR 128 3 939 590 26 SCREW IB LOCK 114 X 3370 385 1 PULLEY FR ASSY 129 3 029 566 12 STOPPER FF 115 3 924 628 01 LEVER FR _ 18 NOTE Due to standardization replacements in the parts list may be different from the parts speci fi
7. gio 22000 T TOTAL CURRENT ave po 2d 2901048 PLAY 165mA c 0 1 AGC CONTROL REC 150nA l o z i d REW 180mA 103 0 0 9 5214 1 5K FF 190nA 5 m S101 5 6 em TM Aven W108 REC PB 0 EV s 6 15 R105 R106 E UN5215 i H 2k 2 ale inr BATERY K K x s W104 on NI 4 m RV60 eens IEC DESIGNATION R R102 S101 5 6 W107 2PCS 3V lug 11627 S 5 SPEED 2201 T C101 0 047 C107 R101 o THP501 PB REC W601 J101 Naa lt 0 1 4 7k 220 2 2 t s 4 4 gt NW 4 0 2 R606 R601 21127 uc 2 0 5 Reoz 00K 22k m 8707 1 5k noni PLUG IN POWER t 22k t Ww 125 L 132XHB CAPSTAN REEL 0109 0 7 ee e BATT 29126 C106 2 1031 a pen UN5115 0 5 220 W602 10007 1 1 8 98 amp C149 1000p 22 gt gt Ge 1 I HRP901 R144 Toss PAUSE ON 3 REC PLAYBACK 47 PAUSE OFF 0 1 0 3 O lt y I w 4 I C132 R122 W102 1 22k 2 6 CHASSIS X C 12 V 01 05215 HE01 S101 4 6 S101 1 6 MIC AMP SWITCHING REC PB REC PB ERASE REC PB EQ AMP PAUSE QN 2 2 0 2 PB REC REC 2 8 0 R201 m VOR CONTROL PAUSE OFF 0 2 AM m REGULATOR 31 C144 22 Lo yp J102 R118 CAPSTAN REEL PAUSE 1000 22 L YA SW BOARD MOTOR 8RIVER IN lt S DEF IC101 1 4 1 4 1 4 1 4 0 1 0 li 1 4 C120 l 560 LA4168ML 0 9 0 5 0 R142 22 REC TIME 100
8. 0 50V C146 1 163 251 11 CERAMIC CHIP 100PF 5 50V C147 1 163 009 11 CERAMIC CHIP 0 001uF 10 50V 10 25V C148 1 164 492 11 CERAMIC CHIP 0 15uF 10 16V 10 100 10 10V C149 1 163 009 11 CERAMIC CHIP 0 001uF 10 50V 20 4V 20 4V CONNECTOR 10 50V CN101 1 580 919 11 JACK DC POLARITY UNIFIED TYPE 10 16V DC IN 3V 5 50V 10 50 lt DIODE gt 10 10V D101 8 719 057 27 LED L 132XHD BATT 20 4V 5 50V IC 25V 16V 10101 8 759 492 49 IC LA4168ML TE L 16V JACK 10 50V 10 16V J101 1 766 847 12 JACK MIC PLUG IN POWER 10 16V J102 1 766 847 12 JACK EAR 20 6 3V 10 50 lt TRANSISTOR gt 20 6 3V Q101 8 729 800 37 TRANSISTOR 2501048 7 20 50 0102 8 729 402 84 TRANSISTOR XN4601 20 16V Q103 8 729 420 50 TRANSISTOR UN5215 20 4V Q104 8 729 230 72 TRANSISTOR 25 1362 0 16V 0105 8 729 230 63 TRANSISTOR 28C4116 YG 20 4V Q106 8 729 800 37 TRANSISTOR 2501048 7 20 4V 0107 8 729 420 53 TRANSISTOR UN5115 20 6 3V 0108 8 729 402 93 TRANSISTOR UN5214 TX 25V 0109 8 729 420 53 TRANSISTOR UN5115 16V Q110 8 729 420 50 TRANSISTOR UN5215 20 4V Q111 8 729 402 93 TRANSISTOR UN5214 TX 10 50 Q112 8 729 420 50 TRANSISTOR UN5215 16V 16V RESISTOR 16V R101 1 216 065 00 RES CHIP 4 7K 5 1 10W 16V R102 1 216 053 00 METAL CHIP 1 5K 5 1 10W 10 50V R103 1 216 069 00 METAL CHIP 6 8K 5 1 10W 10 50V R104 1 216 073 00 METAL CHIP 10K 5 1 10W 19 TCM 20DV 21DV 22DV 23DV Ref No
9. 0 6 3V DOUBLE NORMAL bids gt ade aa oe 72 ET C124 2 21 2581048 7 2 235 122 KA 4 7 25 0 7 REC PB I pn Et BLK 46109 16V 628 0 MONITOR LEVEL Bk 220p i SWITCHING 1 Heme R119 C108 R108 RII4z W BRN 0104 47009 33k 22k BIS 251862 8130 RIZIL R132 4 7 EQ SWITCH V 330 3 3K 15k 3 3 pas d 5 901 AW C114 C116 C113 w PEAKER t iat la 26 47 Ri29 m 4 OFF 8129 100 wd w 0 8 8117 L C117 n 2 6 Lvl 1 0 20 4 7 T1000 n E s 21 2 5 p 5101 8 6 ERIS 1 TER cx 002 NS E Lei i x 0105 REC PB 10k 0 2 0 i XN4601 221851 3 2501819 PB REC 2 04 R116 74 7 C139 0 2 BUFFER 17K N 0 20 4 O4 YOR OFF switcH 101 PE 20 2 6 025 124 p lt 4 RV101 O 23 3k A fl an 0 UN5215 10 y 0175 UN5214 R138 R112 c140 L VOL a R133 C137 L 7K LRT35 VOR ON SWITCH 281392 C145 10k 10000 T REC EQ SWITCH 680 PT 8220 220kT 10000 RII d Feer I C130 8115 C134 T TENTE lt lt lt 01 4 7 SiT 47K 4700p T AM I V Y 5101 2 6 REC PB PB gt REC 05 48 Note on Schematic Diagram All capacitors are in uF unless otherwise noted pF uuF 50 WV or less are not indicated except for electrolytics and tantalums All resistors in Q and or less unless otherwise specified LL panel designation B Line LLL ad
10. 107 725 11 CERAMIC CHIP 0 1uF C108 1 163 017 00 CERAMIC CHIP 0 0047uF C109 1 163 001 11 CERAMIC CHIP 220 C110 1 109 982 11 CERAMIC CHIP 1uF C111 1 135 151 21 TANTALUM CHIP 4 7uF C112 1 163 017 00 CERAMIC CHIP 0 0047uF C113 1 164 005 11 CERAMIC CHIP 0 47uF C114 1 164 346 11 CERAMIC CHIP 1uF C116 1 164 346 11 CERAMIC CHIP 1uF C117 1 163 009 11 CERAMIC CHIP 0 001uF C118 1 164 489 11 CERAMIC CHIP 0 22uF C119 1 164 489 11 CERAMIC CHIP 0 22uF C120 1 126 153 11 ELECT 22uF C121 1 163 009 11 CERAMIC CHIP 0 001uF C122 1 126 153 11 ELECT 22uF C123 1 124 257 00 ELECT 2 2UF C124 1 124 259 11 ELECT 4 7uF 6125 1 124 434 00 ELECT 220uF C126 1 164 346 11 CERAMIC CHIP 1uF C127 1 124 434 00 ELECT 220uF C128 1 124 433 00 ELECT 100uF C129 1 126 153 11 ELECT 22uF C130 1 163 038 00 CERAMIC CHIP 0 1uF C132 1 164 346 11 CERAMIC CHIP 1uF C133 1 135 151 21 TANTALUM CHIP 4 7uF C134 1 164 182 11 CERAMIC CHIP 0 0033uF C136 1 164 346 11 CERAMIC CHIP 1uF C137 1 164 346 11 CERAMIC CHIP 1uF C138 1 164 346 11 CERAMIC CHIP 1uF C139 1 164 505 11 CERAMIC CHIP 2 2uF C140 1 163 009 11 CERAMIC CHIP 0 001uF C141 1 163 009 11 CERAMIC CHIP 0 001uF COILS number please include the board uH uH Remark Ref No Part No Description Remark C142 1 163 009 11 CERAMIC CHIP 0 001uF 10 50V C143 1 163 009 11 CERAMIC CHIP 0 001uF 10 50V C144 1 163 009 11 CERAMIC CHIP 0 001uF 10 50V C145 1 163 009 11 CERAMIC CHIP 0 001uF 1
11. 20DV E MANUAL INSTRUCTION DUTCH SWEDISH FINNISH 20DV E 2 MANUAL INSTRUCTION POLISH CZECH SLOVAKIAN 20DV EE 21DV E MANUAL INSTRUCTION ENGLISH CHINESE 20DV 1E 23DV 1E MANUAL INSTRUCTION ENGLISH CHINESE 20DV CHINESE MANUAL INSTRUCTION ENGLISH RUSSIAN HUNGARIAN 20DV EE MICROPHONE CONDENSER ECM TC60 23DV ber specified The components identified by mark or dotted line with mark A are critical for safety Replace only with part num Les composants identifi s par une marque A sont critiques pour la s curit Ne les remplacer que par une pi ce portant le num ro sp cifi Sony Corporation MAIN SW Ref No Part No Description Remark R105 1 216 049 11 RES CHIP 1K 5 1 10W R106 1 216 049 11 RES CHIP 1K 5 1 10W R108 1 216 085 00 METAL CHIP 33K 5 1 10W R109 1 216 037 00 METAL CHIP 330 5 1 10W R110 1 216 037 00 METAL CHIP 330 5 1 10W R111 1 216 069 00 METAL CHIP 6 8K 5 1 10 R112 1 216 073 00 METAL CHIP 10K 5 1 10W R113 1 216 089 00 RES CHIP 47K 5 1 10W R114 1 216 081 00 METAL CHIP 22K 5 1 10W R115 1 216 065 00 RES CHIP 4 7K 5 1 10 R116 1 216 089 00 RES CHIP 47K 5 1 10W R117 1 216 065 00 RES CHIP 4 7K 5 1 10 R118 1 216 009 00 RES CHIP 22 5 1 10W R119 1 216 121 00 RES CHIP 1M 5 1 10W R122 1 216 081 00 METAL CHIP 22K 5 1 10W R123 1 216 057 00 METAL CHIP 2 2K 5 1 10W R125 1 216 065 00 RES CHIP 4 7K 5 1 10 R126 1 216 033 00 MET
12. 927 668 11 Personal Audio Division Company 20 2000B0579 1 Printed in Japan 2000 2 Published by General Engineering Dept
13. AL CHIP 220 5 1 10W R127 1 216 053 00 METAL CHIP 1 5K 5 1 10 R129 1 216 097 00 RES CHIP 100K 5 1 10 R130 1 216 061 00 METAL CHIP 3 3K 5 1 10 R131 1 216 077 00 RES CHIP 15K 5 1 10W R132 1 216 061 00 METAL CHIP 3 3K 5 1 10W R133 1 216 045 00 METAL CHIP 680 5 1 10W R134 1 216 061 00 METAL CHIP 3 3K 5 1 10 R135 1 216 105 00 RES CHIP 220K 5 1 10 R136 1 216 097 00 RES CHIP 100K 5 1 10 R137 1 216 073 00 METAL CHIP 10K 5 1 10W R138 1 216 097 00 RES CHIP 100K 5 1 10 R139 1 216 105 00 RES CHIP 220K 5 1 10W R141 1 216 073 00 METAL CHIP 10K 5 1 10W R142 1 216 025 00 RES CHIP 100 5 1 10W R143 1 216 065 00 RES CHIP 4 7K 5 1 10 R144 1 216 017 00 RES CHIP 47 5 1 10W R201 1 216 009 00 RES CHIP 22 5 1 10W R601 1 216 081 00 METAL CHIP 22K 5 1 10W R602 1 216 049 11 RES CHIP 1K 5 1 10W R603 1 216 053 00 METAL CHIP 1 5K 5 1 10W R604 1 216 077 00 RES CHIP 15K 5 1 10W R606 1 216 097 00 RES CHIP 100K 5 1 10W R607 1 216 081 00 METAL CHIP 22K 5 1 10W R609 1 216 053 00 METAL CHIP 1 5K 5 1 10W R610 1 216 057 00 METAL CHIP 2 2K 5 1 10W VARIABLE RESISTOR RV101 1 227 166 11 RES VAR CARBON VOL RV601 1 223 583 11 RES ADJ CARBON 1K RV602 1 225 598 11 RES VAR CARBON 2K SPEED CONTROL RV603 1 223 587 11 RES ADJ CARBON 22K SWITCH 101 1 771 321 11 SWITCH SLIDE REC PB 102 1 572 688 11 SWITCH PUSH 1 KEY POWER 104 1 692 605 31 SWITCH SLIDE VOR 105 1 572 922 11 SWITCH SLIDE PAUSE 9
14. EQ 1 VOR OFF 9 REC PB 7 MONITOR LEVEL SWITCH SWITCHING 0112 lt lt SWITCHING Dur 0111 VOR ON 8105 SWITCH RUSE REC B m ji POWER ON REC PB ON B 77 5601 7 CAPSTAN REEL MOTOR DRIVE x ie THP601 eee 4 SWITCH REC B 0109 110 POWER ON B PB 5101 6 6 a dic REC TIME TAPE SPEED DOUBLE NORMAL Y RV602 NORMAL SPEED S101 5 6 DRY BATTERY REC SPEED CONTROL REC PB RON B SIZE AA PB gt IEC DESIGNATION R6 THP602 RV601 Syn VEER REGULATOR 102 2PCS 3V lt POWER PB RIPPLE CN101 RV603 FILTER 7 2 DC IN TAPE SPEED REC REFERENCE HO VREF VOLTAGE DOUBLE SPEED GENERATOR BATTERY B 7 GVN CONT Y Y M901 GVN OUT MOTOR REFERENCE VOLTAGE CAPSTAN REEL DRIVER MUTE SWITCH 0107 108 05 10 TCM 20DV 21DV 22DV 23DV
15. SERVICE MANUAL Ver 1 0 2000 02 Recording system 2 track 1 channel monaural Tape speed 4 8 cm s or 2 4 cm s Frequency range 250 6 300 Hz using nomal TYPE I cassette with REC TIME switch at NORMAL Speaker Approx 3 6 cm 17 in dia Power output 250 mW at 10 harmonic distortion Input Microphone input jack minijack sensitivity 0 2 mV for 3 kilohms or lower impedance microphone Output Earphone jack minijack for 8 300 ohms earphone Variable range of the tape speed From approx 30 to 15 with REC TIME switch at NORMAL Power requirements 3 V DC batteries R6 AA x 2 External DC 3 V power sources Dimensions w h d incl projecting parts and controls Approx 112 x 36 6 x 90 3 mm 45x15 x3 in Mass Approx 175 g 6 2 oz Photo TCM 20DV TCM 20DV 21DV 22DV 23DV US Model TCM 20DV 21DV 22DV 23DV Canadian Model TCM 20DV 22DV AEP Model TCM 20DV 21DV E Model TCM 20DV 23DV Chinese Model TCM 20DV Model Name Using Similar Mechanism NEW MT 20DV 118 Tape Transport Mechanism Type SPECIFICATIONS Supplied accessories The instructions in this manual are for 4 models The TCM 20DV is the model used for illustration purposes TCM 23DV 22DV 21DV 20DV AC power adaptor 1 O Battery charger adaptor 1 O Rechargeable batteries 2 NCAR 12V 700mAh Ni Cd Cassette tape C 90 1 O Battery LR6 2
16. arked are not stocked since they are seldom required for routine service Some delay should be anticipated when ordering these items The mechanical parts with no reference num ber in the exploded views are not supplied Accessories and packing materials are given in the last of the electrical parts list supplied Description Remark Ref No Part No Description Remark Ref No Part No 1 3 318 382 31 SCREW 1 7 TAPPING 16 3 924 739 01 SPRING CASSETTE 2 3 345 648 01 SCREW M1 4 TOOTHED LOCK 17 X 4952 666 1 LID ASSY CASSETTE 3 A 3021 314 A MAIN BOARD COMPLETE 18 4 017 441 01 CUSHION B 4 3 924 741 01 TERMINAL PLUS 19 3 924 757 01 BRACKET SPEAKER 5 3 936 973 01 TERMINAL MINUS 20 3 328 319 01 STRAP HAND 6 3 924 744 01 SPRING CLAW DETECTION TENSION 21 3 924 749 21 LID BATTERY CASE 7 3 924 743 01 CLAW ERASING PROTECTION 22 3 924 747 21 KNOB PAUSE 8 3 334 565 41 SCREW B1 7 TAPPING 23 3 019 597 11 CABINET REAR 9 3 924 745 01 BAR GROUND 24 3 318 203 92 SCREW B1 7X9 TAPPING 10 3 924 740 01 HOLDER MICROPHONE 25 3 366 890 51 SCREW IB LOCK 11 3 924 763 01 CUSHION MICROPHONE 12 3 924 742 21 KNOB VOR 13 3 939 590 26 SCREW IB LOCK 14 3 578 101 31 PLATE ORNAMENTAL 15 3 019 364 33 CABINET FRONT 20DV 1E 23DV 1E 15 3 019 364 43 CABINET FRONT 20DV 1E 23DV 1E 26 3 831 441 99 CUSHION SP901 16 1 676 967 11 1 505 838 11 MIC101 1 542 136 11 28 3
17. ck MT 20DV 118 Remove the two solders motor M901 pulley FR assy motor DC flywheel assy INSTALLATION MAIN BOARD On installation MAIN board adjust to the S101 and the 102 screw ff 1 7 Screw M1 4 102 POWER S101 REC PB lever REC SECTION 4 MECHANICAL ADJUSTMENTS Clean the following parts with a denatured alcohol moistened swab record playback head pinch roller erase head rubber belt capstan idlers Demagnetize the record playback head with a head demagne tizer Do not bring the head demagnetizer close to the erase head Do not use a magnetized screwdriver for the adjustments After the adjustments apply suitable locking compound to the parts adjusted The adjustments should be performed with the rated power supply voltage 2 5 V unless otherwise noted Torque Measurement Torque Meter Meter Reading FWD 2 16 4 7 mNem 22 48 gecm 0 31 0 67 oz inch 0 05 0 29 mN m 2 0 5 3 gecm Back Tension 0 007 0 04 ozeinch CQ 102C FF Tape Tension Measurement 4 90 mNem CQ 201B more than 50 gecm more than 0 69 ozeinch Torque Meter Meter Reading 4 90 mNem CQ 403C more than 50 g more than 1 76 oz SECTION 5 ELECTRICAL ADJUSTMENTS Setting Supplied voltage 2 5 V Switch and control position control RV101 mechanical center sw
18. e is within 1 NORMAL approx 30 4 Hz DOUBLE approx 15 4 Hz Adjustment Location MAIN BOARD Conductor Side RV601 Tape Speed Adjustment Normal Speed RV603 Tape Speed Adjustment Double Speed TCM 20DV 21DV 22DV 23DV SECTION 6 DIAGRAMS 6 1 BLOCK DIAGRAM MIC101 bs e SIGNAL PATH gt gt PLAY gt gt RECORD J101 MIC l VREF PLUG IN POWER 0101 AGC CONTROL S101 2 6 MIC AMP REC PB EQ AMP 0104 POWER VOR CONTROL REGULATOR 5101 3 6 1101 1 3 PB EQ REC B PB IC101 2 3 REC PB SWITCH RV101 PB VOL a Y S101 TE POW OUT 1 E ee DP gt gt 0102 gt en 0102 gi 55 POW OUT2 k gt SP901 L me SPEAKER REC S101 4 6 5 gt J102 oY a EAR POWER ON B HRP901 REC PB 4 ig VREF Y HE901 ERASE e 5104 M 2 VOR REC B 7 PB By gt H L lt OFF D101 77 REC 0106 0103 REC B Q105 REC
19. ed from the conductor side e Through hole Pattern from the side which enables seeing S601 The other layers patterns are not indicated andi EU t C ti DC IN 3V 2 B aution b Pattern face side Parts on the pattern face side seen from The iir Conductor Side the pattern face are indicated 79 Parts face side Parts on the parts face side seen from 1 676 967 11 Component Side the parts face are indicated 11 1 676 966 11 1 676 966 11 Sos 6 3 SCHEMATIC DIAGRAM See page 15 for IC Block Diagram TCM 20DV 21DV 22DV 23DV 0107 3 R136 5102 0109 110 g UN5115 100k 0107 108 POWER B 101 027 C128 129 MUTE SWITCH REFERENCE VOLTAGE HA CE Y BC IN 3V 20 100 22 l s B MUTE SWITCH 2 oC 0 E 8 lcio4 C105 2 R104 col S 2 iq 10 10 4 F 0
20. ed in the diagrams or the components used on the set XX and X mean standardized parts so they may have some difference from the original one RESISTORS All resistors are in ohms METAL Metal film resistor METAL OXIDE Metal oxide film resistor F nonflammable Abbreviation SECTION 8 ELECTRICAL PARTS LIST Items marked are not stocked since they are seldom required for routine service Some delay should be anticipated when order ing these items SEMICONDUCTORS In each case u for example uA uPA uPA uPB UPB uPC UPC uPD uPD CAPACITORS uF uF MAIN The components identified by mark A or dotted line with mark are critical for safety Replace only with part number specified Les composants identifi s par une marque A sont critiquens pour la s curit Ne les remplacer que par une pi ce portant le num ro sp cifi When indicating parts by reference 1E No indication of country of origin Ref No Part No Description A 3021 314 A MAIN BOARD COMPLETE spoke se se e ote ok se ote oe ote oe ote akc se ote fe ake ok ok ake 3 924 741 01 TERMINAL PLUS CAPACITOR C101 1 163 809 11 CERAMIC CHIP 0 047uF C102 1 164 161 11 CERAMIC CHIP 0 0022uF C103 1 109 982 11 CERAMIC CHIP 1uF C104 1 135 201 11 TANTALUM CHIP 10uF C105 1 135 201 11 TANTALUM CHIP 10uF C106 1 163 009 11 CERAMIC CHIP 0 001uF C107 1
21. iring Do not touch the soldering iron on the same conductor of the circuit board within 3 times Be careful not to apply force on the conductor when soldering or unsoldering Notes on chip component replacement Never reuse a disconnected chip component Notice that the minus side of a tantalum capacitor may be dam aged by heat 2 SECTION 2 GENERAL Location of Controls VOL SPEED CONTROL gt gt FF CUE 1 This section is extracted from instruction manual REC TIME DC IN 3 V SECTION 3 DISASSEMBLY This set can be disassembled in the order shown below SET CABINET REAR CASSETTE LID wmm MAIN BOARD MECHANISM DECK MT 20DV 118 mamm BELT Note Follow the disassembly procedure in the numerical order given CABINET REAR CASSETTE LID INSTALLATION CASSETTE SPRING cabinet front cassette lid rail cassette lid cassette spring Remove the six solders Q hand strap cabinet rear screw IB lock claw three screws B1 7x 9 MAIN BOARD MECHANISM DECK MT 20DV 118 three screws IB lock MIC101 MAIN board Q Remove the two solders magnetic head HRP901 BELT belt capstan EN ME de FR ilio l SH G B NS lt L screw 1 7 FR belt capstan belt mechanism de
22. itch S105 OFF SPEED CONTROL RV602 center click switch S104 OFF Test Tape Signal Used for 6 3 kHz 10 dB Head Azimuth Adjustment 3 kHz 0 dB Tape Speed Adjustment 0 dB 0 775 V Record Playback Head Azimuth Adjustment Mode playback test tape P 4 A063 6 3 kHz 10 dB level meter 10 p set lt lt 1 _ EAR jack J102 Procedure Turn the adjustment screw to obtain the maximum reading on level meter Note Several peaks may appear but take the maximum 2 After the adjustment lock the adjustment screw with suitable locking compound Adjustment Location Press the button Tape Speed Adjustment Mode playback test tape frequency 3 kHz 0 dB 10 set m 2 EAR jack 9102 Procedure Normal Speed 1 Set switch S601 to NORMAL 4 8 cm s posi tion and playback the tape WS 48A 2 Adjust RV601 so that frequency counter reading becomes 3 040 Hz Specification values 3 030 to 3 050 Hz Double Speed 3 Set switch S601 to DOUBLE 2 4 cm s posi tion 4 Playback the tape from the beginning for two minutes then adjust RV603 so that frequency counter reading becomes 1 540 Hz Specification values 1 535 to 1 545 Hz Confirm that deflection of the frequency counter reading between the beginning and the end of tap
23. justment for repair Total current is measured with no cassette installed Power voltage is dc 3 V and fed with regulated dc power supply from external power voltage jack 14 Voltages dc with respect to ground under no signal conditions no mark PLAY RECORD Voltages are taken with a VOM Input impedance 10 MQ Voltage variations may be noted due to normal produc tion tolerances Signal path gt gt PLAY RECORD IC Block Diagram IC101 LA4168ML TE L amp PRE GND MIC IN Vref OUT PRE NF PREOUT 5 REC IN 5 FOUT LED DRIVE 3 RPSW S P RMUTE GVN CONT REC OUT ALC CONT Vs GVNGND S GvNOUT VOX CONT VOX DELAY GNV SPEED UP AUT STOP CONT 15 AUT STOP IN PWR IN PWR OUT1 PWR GND PWR OUT2 NOTE XX and X mean standardized parts so they may have some difference from the original one Color Indication of Appearance Parts Example KNOB BALANCE ere TT Ds Parts Color Cabinet s Color Abbreviation 1E No indication of country of origin 1 CABINET SECTION MT 20DV 118 SECTION 7 EXPLODED VIEWS Items m
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