Sony TCM-22DV, TCM-20DV, TCM-21DV Section Diagrams, Block Diagram, Signal Path Play Record

Page 9

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

SECTION 6

DIAGRAMS

6-1. BLOCK DIAGRAM

MIC101

MIC

J101

MIC

(PLUG IN POWER)

HRP901

(REC/PB)

HE901

(ERASE)

 

 

 

 

 

 

 

 

 

VREF

 

 

Q101

 

 

 

 

 

 

 

 

 

 

AGC

 

 

 

 

 

 

 

 

 

 

CONTROL

 

 

MIC AMP, REC/PB EQ AMP

Q104

 

 

 

 

 

 

 

 

 

 

 

 

 

IC101 (1/3)

 

PB EQ

 

REC B+

 

 

 

 

 

 

 

 

SWITCH

 

 

S101

 

 

MIC IN

 

MIC

 

 

PRE

 

 

 

 

28

 

 

 

 

 

(REC/PB)

 

 

 

AMP

 

 

OUT

 

 

PB

 

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

 

 

 

REC

S101 (4/6)

 

 

 

 

 

 

 

+

 

 

EQ IN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EQ

 

 

NF

 

 

 

 

 

29

 

 

 

 

 

 

 

 

 

 

AMP

 

 

 

 

 

 

 

 

 

 

 

 

 

PRE

 

 

 

 

 

 

 

 

 

 

NF

 

 

 

VREF

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

S101 (1/6)

 

 

 

 

 

 

 

 

 

 

 

 

 

ALC

 

 

 

 

 

REC B+

 

 

 

 

CONT

ALC

 

 

 

 

 

 

 

 

 

5

 

 

 

Q103

 

 

 

 

 

 

 

 

 

REC EQ

 

 

 

 

 

 

 

 

 

SWITCH

 

 

 

 

REC OUT

REC

 

REC IN

 

 

 

 

 

4

 

AMP

 

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

POWER ON

 

 

 

 

 

 

 

 

 

B+

 

 

 

 

 

 

 

S601-2

 

 

 

CAPSTAN/REEL MOTOR DRIVE

 

 

 

REC TIME

 

 

 

 

 

 

 

 

 

 

IC101 (3/3)

 

 

 

DOUBLE

NORMAL

 

THP601

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

POWER ON B+

 

 

 

 

 

VS

 

 

 

 

 

 

 

 

 

18

 

 

S101 (6/6)

 

 

 

 

S601-1

 

 

 

(REC/PB)

 

RV601

 

 

 

 

 

 

REC TIME

 

 

 

 

PB

 

 

 

 

 

 

 

 

 

TAPE SPEED

DOUBLE

NORMAL

 

 

 

 

RV602

 

 

 

 

(NORMAL SPEED)

 

 

 

 

 

 

 

 

 

 

 

REC

SPEED CONTROL

 

 

 

 

 

 

 

 

 

 

 

THP602

RV601

 

 

 

GVN VREF

 

 

 

 

 

 

 

 

 

 

19

 

 

 

 

 

 

 

 

RV603

 

 

 

 

 

 

 

 

 

TAPE SPEED

 

 

 

 

 

 

 

 

(DOUBLE SPEED)

 

 

 

 

 

 

 

 

 

 

 

GVN CONT

 

 

 

 

 

 

 

 

 

 

20

 

 

 

 

 

 

M901

 

M

 

GVN OUT

MOTOR

VCC B+

 

 

 

(CAPSTAN/REEL)

 

16

DRIVER

05

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SIGNAL PATH

 

 

 

 

 

 

 

 

 

 

 

 

: PLAY

 

 

 

 

 

 

 

 

 

 

 

 

: RECORD

 

 

 

 

S101 (2/6)

 

POWER AMP, VOR CONTROL,REGULATOR

 

 

S101 (3/6)

 

 

 

 

(REC/PB)

 

 

 

 

RV101

 

 

PB

 

 

IC101 (2/3)

 

 

 

(REC/PB)

 

 

 

 

 

 

 

 

 

PB

 

 

 

 

 

 

 

 

 

 

 

 

 

VOL

 

 

REC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

POW OUT 1

 

 

REC

 

 

 

 

BUFFER

 

 

 

 

 

 

 

 

 

 

 

 

POW IN

 

12

 

 

 

 

 

 

 

 

POWER

 

 

 

 

 

 

 

Q102

 

11

POW OUT 2

 

 

SP901

 

 

 

 

 

 

AMP

14

 

 

 

 

 

 

 

 

 

 

 

 

(SPEAKER)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+

 

 

VOR

 

 

 

 

 

J102

 

 

 

 

 

 

 

 

 

EAR

 

 

 

 

 

DELAY

 

 

 

POWER ON B+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

VOX

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

S104

 

 

 

 

 

 

 

 

 

PB B+

 

 

VOR

 

REC B+

 

 

 

 

 

 

 

 

H

L

OFF

 

 

 

 

 

 

D101

 

 

 

 

 

 

 

 

 

 

LED

 

BATT

 

 

 

 

 

 

Q105

 

 

 

 

 

 

Q106

 

 

REC B+

 

 

 

 

DRIVE

 

 

 

 

 

 

 

 

 

24

 

 

REC/PB

 

 

 

VOR OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MONITOR LEVEL

 

 

 

 

SWITCH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SWITCHING

 

 

 

 

 

 

 

 

 

 

Q112

 

 

 

 

 

 

 

 

 

 

 

PB B+

 

 

 

 

Q111

 

 

 

 

 

 

SWITCHING

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VOR ON

 

 

R/P

PAUSE

 

 

 

S105

 

 

 

SWITCH

 

 

 

 

 

 

PAUSE .

 

 

 

 

REC B+

23

SW

 

 

 

 

 

 

 

 

 

PAUSE

 

 

 

OFF

 

 

 

 

 

 

22

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

REC/PB

 

 

 

 

 

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MUTE

 

 

MUTE

 

 

 

 

 

 

 

 

MUTE

21

 

SWITCH

REC B+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Q109, 110

 

 

 

 

 

 

 

 

 

 

 

 

 

PB B+

 

 

 

 

S101 (5/6)

 

 

 

 

 

POWER ON B+

 

DRY BATTERY

 

 

 

(REC/PB)

 

MIC

 

 

 

 

SIZE “AA”

 

 

 

PB B+

 

 

VCC

 

 

 

 

 

(IEC DESIGNATION R6)

 

 

REC B+

 

26

REGULATOR

 

 

 

S102

2PCS. 3V

 

 

 

 

 

 

 

 

 

 

(POWER)

 

 

 

 

 

PB

 

 

 

VCC

 

 

CN101

 

 

 

 

 

 

RIPPLE

15

 

 

 

 

 

 

 

 

 

FILTER

 

 

 

DC IN 3V

 

 

 

 

 

 

 

 

 

 

 

+

 

 

VREF

REC

27

VREF REFERENCE

 

 

 

 

 

 

 

 

VOLTAGE

 

 

 

 

BATTERY B+

 

 

 

 

 

 

 

GENERATOR

 

 

 

 

 

 

 

 

REFERENCE VOLTAGE

 

 

 

 

 

 

 

 

 

 

 

 

MUTE SWITCH

 

 

 

 

 

 

 

 

 

 

 

 

Q107, 108

 

 

 

 

 

 

 

 

 

– 9 –

– 10 –

Image 9
Contents NEW SpecificationsMechanical Adjustments Table of ContentsDiagrams Section Servicing NotesLocation of Controls Section GeneralCabinet REAR, Cassette LID Section DisassemblyBelt Main BOARD, Mechanism Deck MT-20DV-118Installation Main Board Section Mechanical Adjustments Torque MeasurementTape Tension Measurement Tape Speed Adjustment Section Electrical AdjustmentsRecord/Playback Head Azimuth Adjustment Test TapeSection Diagrams Block DiagramSignal Path Play Record Printed Wiring Boards Semiconductor LocationSW Board Schematic Diagram See page 15 for IC Block Diagram IC Block Diagram IC101 LA4168ML-TE-L Section Exploded ViewsCabinet Section Mechanism Deck MT-20DV-118 110 109 112 116 101 107 120 Section Electrical Parts List Main Main SW
Related manuals
Manual 2 pages 54.28 Kb Manual 2 pages 53.96 Kb

TCM-21DV, TCM-20DV, TCM-22DV specifications

The Sony TCM-20DV, TCM-21DV, and TCM-22DV are compact cassette tape recorders that exemplify the brand's commitment to quality audio capture and practical design. These models cater to a diverse audience, including students, journalists, and hobbyists, who need reliable recording devices for various purposes, from lectures and interviews to personal dictations.

The TCM-20DV, the entry-level model, offers straightforward functionality with user-friendly controls. It features a built-in microphone and a simple button layout, allowing users to start recording quickly and effortlessly. This model supports normal and high-speed playback, enabling fast review of recorded material. The TCM-20DV is powered by two AA batteries, making it an accessible and portable option for on-the-go recordings.

Moving up the line, the TCM-21DV introduces additional features that enhance the user experience. It retains the solid build quality and portability of its predecessor while adding a headphone jack for private listening and an external microphone input for improved audio quality. This model also includes an automatic shut-off feature, which conserves battery life by turning off the device when idle for a specific duration. The TCM-21DV is well-suited for more demanding recording tasks, thanks to these enhancements.

The TCM-22DV, the flagship model in this trio, takes the capabilities even further. It incorporates a dynamic microphone that captures clear and crisp audio, making it particularly effective in noisy environments. The TCM-22DV also offers advanced sound processing technologies that enhance playback fidelity, ensuring that recordings sound as close to the original source as possible. Furthermore, it features a built-in speaker that allows for convenient playback without the need for headphones.

All three models are built with durable materials, ensuring longevity and robustness for everyday use. Their design emphasizes ease of use, featuring intuitive controls and lightweight construction that make them comfortable to handle and transport.

In conclusion, the Sony TCM-20DV, TCM-21DV, and TCM-22DV serve distinct user needs while displaying the brand's dedication to quality audio recording. With lightweight, portable designs, various features, and enhancements, these tape recorders remain relevant in an age of digital technology, continuing to offer reliable and effective audio solutions.