Sony tcm 74 v service manual

Page 1

SERVICE

MANUAL

US Model

TCM-72V/ 74V/ 75V

Canadian Model

TC M-74V

AEP Model

TCM-74V/ 75V

UK Model

TC M-74V

E Model

TOM-75V

Photo : TOM-75V

Recording system .........
Frequency response-
speaker ..........
Power output
Input ..........................

Output ........................

Power requirements ------

SPECIFICATIONS

2vtracl< 1channel monaural

~150-6.000Hz
~-Appro><, 4.5cm (1%inches) dia.
~-160mW (at 10% harmonic distortion)

Microphone input jack (minijack)
sensitivity 0.2mV (-72dB) for 3kQ
or lower impedance microphone.
Earphone jack (minijack) for 8-3009
earphone

3V DC. two R6 (size AA) batteries DO
IN 3V jack accepts:

0 Sony AC power adaptor for use on:

US. Canadian model
AEP model
UK model

E model

120V AC. 60Hz
220V AC. 50H:
240V AC. 50H:

120V AC, BOHZ
or 220V AC. 50H:

AC-DZM
(optional)

. Sony D0070 car battery cord (optional) for use with 12V

car battery.
Battery life (hours)

Battery Recording
Sony battery SUM-8 (NS) ApproxA
Sony alkaline battery AMS (N) ApproxJZ

TOM-11. 15V. 21. 23V
TCMV31. 32V. 33. 34V
TOM-35. 37V. 71, 73

Model Name Using
Similar Mechanism Set

TOM-72V MT»72V-13
Tape Transport Mechanism Set TCMV74V
TCMV75V MTV74V-13
Dimensions ~~~~~~~~~~~~ TOM-72V : Approx. 94.1 X136.4><37.1mm

(w/h/d) (3% X5% X1% inches)
TCM-74V/75V : Approx. 94.1X137.1><
37.1 mm (w/h/d)
(3% X5/2><1'/z inches)
incl. projecting parts and controls

Weight ~~~~~~~~~~~~~~~~~ Approx. 2709
(9.602) incl. batteris

Design and specifications subject to change without notice.

US model :

Note: Use only the recommended AC power adaptor or car
battery cord manufactured by Sony. Polarity of the
plugs of other manufactures may be different.

Except US model:

Note: If an AC power adaptor or a car battery cord not
manufactured by Sony is used. a fuse must be
installed in the battery cord and the polarity of the
pulg must be as illustrated.

«>4

Polarity oi the
Sony plug

CASSETTE-BBRDER
SONY.

Page 2

FEATURES

- Compact size and easy operation.

. VOR system economizes tapes, batteries and playback time.

- You can quickly locate the desired portion that has been
marked by CUE MARKER (TCMV75V).

. You can review the previously recorded portion with one-
button operation.

What is VOR (Voice operated recording) system?

With this system. recording starts only when the sound is
picked up and stops automatically when the sound is no longer
detected.

What is CUE MARKER?

You mark a desired portion by CUE MARKER while recording.
Then the beep sound will tell you a marked portion while CUE
or REVIEW is being pressed during tape playback. You can
easily locate the certain portion you marked.

SERVICE NOTE

Repairing printed resistor

Cut both sides of the resistor and solder the carbon resistor
having same value in place of printed one of the conductor
side.

1/32W carbon resistor is supplied for the replacing part of
the printed resistor.

Notes on chip component replacement

0 Never reuse a disconnected chip component

- Notice that the minus side of a tantalum capacitor may be
damaged by heat.

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SECTION 1
GENERAL

PARTS IDENTIFICATION

The illustration of TCMJSV

I: VOFI (voice operated recording) ONIOFF switch
2 EAR (EARPHONE) jack
E Built-in microphone

a

Tape operation buttons

0 REC (record)/V PLAY/ l STOP] ¥ FF/CUE (fast
lorwardlcue)/ f HEW/REVIEW (rewind/rewew)

E PAUSE switch

E Speaker (rear)

E Handstlap

E Tape COUNTER and reset button (TCM-74VI75V)

For indexing the tape contents. Before recording push
the reset button to set the counter to 000.

IE VOLUME/VCR SENS (von sensitivity)
control
in playback mode: volume control
in recording mode: VOR sensnivity control
E Cassette holder

E MIC PLUG IN POWER (external microphone) input
jack (right side)

is]

Dc IN 3 V (external power input) jack (right side)
Battery compartment (right side)
CUE MARKER button (TOM-75V)

lfill

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