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TCM-20DV/21DV/22DV/23DV

– 13 –

– 14 –

Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted.  pF: µµF

50 WV or less are not indicated except for electrolytics
and tantalums.

• All resistors are in 

 and 

1

/

4

 

W or less unless otherwise

specified.

C

: panel designation.

U

: B+ Line.

H

: adjustment 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.

• Voltages are dc with respect to ground under no-signal

conditions.
no mark : PLAY
<

> : RECORD

• Voltages are taken with a VOM (Input impedance 10 M

).

Voltage variations may be noted due to normal produc-
tion tolerances.

• Signal path.

E

: PLAY

a

: RECORD

6-3.

SCHEMATIC  DIAGRAM

 See page 15 for IC Block Diagram.

Содержание Pressman TCM-21DV

Страница 1: ...nding on the operation of the unit For maximum performance we recommend that you use alkaline batteries House Current see Fig A 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 E30H...

Страница 2: ...É LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT NE REMPLACER CES COM POSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY SAFETY RELATED COMPONENT WARNING COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIA...

Страница 3: ... SECTION 2 GENERAL This section is extracted from instruction manual Location of Controls REC TIME MIC VOL B PLAY M FF CUE SPEED CONTROL EAR VOR z REC x STOP m REW REVIEW PAUSE DC IN 3 V Built in mic BATT ...

Страница 4: ...can be disassembled in the order shown below SET CABINET REAR CASSETTE LID MAIN BOARD MECHANISM DECK MT 20DV 118 BELT 9 cassette lid INSTALLATION CASSETTE SPRING cabinet front 5 hand strap 3 claw 3 four claws 2 screw IB lock 4 cabinet rear 1 three screws B1 7 9 7 boss 7 boss 6 Remove the six solders cassette lid cassette spring ...

Страница 5: ... board 7 mechanism deck MT 20DV 118 5 three screws IB lock 1 Remove the two solders electret condenser microphone MIC101 1 Remove the two solders magnetic head HRP901 1 Remove the two solders motor M901 1 belt capstan 2 belt FR capstan belt FR belt pulley FR assy flywheel assy motor DC ...

Страница 6: ... 6 INSTALLATION MAIN BOARD On installation MAIN board adjust to the S101 and the S102 screw 1 7 screw M1 4 MAIN board S101 REC PB S102 POWER lever REC ...

Страница 7: ...e Tension Measurement 1 Clean the following parts with a denatured alcohol moistened swab record playback head pinch roller erase head rubber belt capstan idlers 2 Demagnetize the record playback head with a head demagne tizer Do not bring the head demagnetizer close to the erase head 3 Do not use a magnetized screwdriver for the adjustments 4 After the adjustments apply suitable locking compound ...

Страница 8: ...tion MAIN BOARD Conductor Side Setting Supplied voltage 2 5 V Switch and control position VOL control RV101 mechanical center PAUSE switch S105 OFF SPEED CONTROL RV602 center click VOR switch S104 OFF Test Tape Record Playback Head Azimuth Adjustment Mode playback Procedure 1 Turn the adjustment screw to obtain the maximum reading on level meter Note Several peaks may appear but take the maximum 2...

Страница 9: ...C PLUG IN POWER RV101 VOL J102 EAR MIC AMP EQ AMP POWER AMP VOX REC PB PAUSE MUTE RIPPLE FILTER REFERENCE VOLTAGE GENERATOR REFERENCE VOLTAGE MUTE SWITCH Q107 108 REGULATOR MOTOR DRIVER REC AMP ALC BUFFER Q102 MUTE SWITCH Q109 110 NF Q103 REC EQ SWITCH Q104 PB EQ SWITCH S101 REC PB PB REC S101 2 6 REC PB PB REC S101 5 6 REC PB PB REC OFF ON S101 3 6 REC PB PB REC PB B Q112 SWITCHING Q105 VOR OFF S...

Страница 10: ...6 5 4 S101 REC PB REC PB SW BOARD MAIN BOARD COMPONENT SIDE R139 R143 R117 R116 C139 R138 R141 R126 R144 R123 C138 R135 R201 R115 R125 C130 R604 R127 C137 R136 C113 Q105 B C E Q110 Q109 Q107 Q108 B C E B C E B C E B C E B C E Q112 C133 Q111 B C E S105 PAUSE OFF ON RV602 SPEED CONTROL S104 VOR OFF L H 1 676 966 11 11 1 A 2 3 4 5 6 7 8 9 10 11 12 13 14 15 B C D E F G H I J K 2 1 S601 REC TIME DOUBLE...

Страница 11: ... U B Line H adjustment 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 Voltages are dc with respect to ground under no signal conditions no mark PLAY RECORD Voltages are taken with aVOM Input impedance 10 MΩ Voltage variations may be noted due to normal produc tion tolerances Signal path...

Страница 12: ...tion Remark 15 16 1 3 318 382 31 SCREW 1 7 TAPPING 2 3 345 648 01 SCREW M1 4 TOOTHED LOCK 3 A 3021 314 A MAIN BOARD COMPLETE 4 3 924 741 01 TERMINAL PLUS 5 3 936 973 01 TERMINAL MINUS 6 3 924 744 01 SPRING CLAW DETECTION TENSION 7 3 924 743 01 CLAW ERASING PROTECTION 8 3 334 565 41 SCREW B1 7 TAPPING 9 3 924 745 01 BAR GROUND 10 3 924 740 01 HOLDER MICROPHONE 11 3 924 763 01 CUSHION MICROPHONE 12 ...

Страница 13: ...7 01 SPRING IDLER COMPRESSION 65 3 924 637 01 GEAR FF 66 3 924 673 01 GEAR S REEL 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...

Страница 14: ... ASSY IDLER 113 3 924 682 01 BELT FR 114 X 3370 385 1 PULLEY FR ASSY 115 3 924 628 01 LEVER FR 116 3 924 633 01 SPRING STOP TENSION 117 3 924 622 01 LEVER STOP 118 3 924 643 01 SPRING PR TORSION 119 3 924 684 01 SPRING LOCK PLATE TENSION 120 3 924 619 01 LEVER SW 121 3 924 639 01 LEVER CR 122 3 924 618 01 LEVER LOCK 123 3 925 208 01 SPRING REC TENSION 124 3 924 624 01 LEVER REC 125 X 3372 155 1 CH...

Страница 15: ...01uF 10 50V C145 1 163 009 11 CERAMIC CHIP 0 001uF 10 50V C146 1 163 251 11 CERAMIC CHIP 100PF 5 50V C147 1 163 009 11 CERAMIC CHIP 0 001uF 10 50V C148 1 164 492 11 CERAMIC CHIP 0 15uF 10 16V C149 1 163 009 11 CERAMIC CHIP 0 001uF 10 50V CONNECTOR CN101 1 580 919 11 JACK DC POLARITY UNIFIED TYPE DC IN 3V DIODE D101 8 719 057 27 LED L 132XHD BATT IC IC101 8 759 492 49 IC LA4168ML TE L JACK J101 1 7...

Страница 16: ...TOR RV101 1 227 166 11 RES VAR CARBON VOL w 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 S101 1 771 321 11 SWITCH SLIDE REC PB S102 1 572 688 11 SWITCH PUSH 1 KEY POWER S104 1 692 605 31 SWITCH SLIDE VOR S105 1 572 922 11 SWITCH SLIDE PAUSE THERMISTOR THP601 1 810 007 11 THERMISTOR POSITIVE THP602 1 809 350 21 ...

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