Sony TC-42 Manual de usuario

Power

Requirements:

Track

System:

Tape:

Tape

Speed:

Recording

Time:

(with

C-120

tape

cassette)

Frequency

Response:

Wow

and

Flutter:

Power

Output:

Record

Bias

Frequency:

Apa

NAENT

ARE!

SPECIFICATIONS

with

four

penlight

batteries,

house

hold

current

with

adaptor

[AC-9

(USA

and

Canada),

AC-456C

and

AEP)],

rechargeable

battery

pack

(BP-23)

with

SONY

car

battery

cord

(DCC-126)

Two-track

mono

SONY

tape

cassette

equivalent

17g

ips

(4.8

cm/s)

2.0

hrs

total

10,000

0.38

(RMS)

weighted

500

maximum

Approx,

kHz

Input:

Output:

Speaker:

Semiconductors:

Dimensions:

Weight:

CNY

SERVICE

MANUAL

Model

USA

Mode!

Canada

Mode!

AEP

Model

CASSETTE-CORDER

MIC

input

Impedance

low

impedance

Maximum

sensitivity

0.2

(-72dB)

MONITOR

output

Impedance

Output

level

load

0.775

dB)

with

k{2

load

3%”

(70mm)

Dynamic

speaker

Voice

coil

impedance:

FET,

transistors

and

diodes

2°

(W)

7/6

IH)

45/9

"(D)

(51

184x111

mm)

(0.98

kg)

with

four

penlight

batteries

Section

Title

Page

Specifications.

2.0.2

2Ga“

See

eee

BAS

OUTLINE

l-l.

Servo

Control

Circuit

Operation

..........2.

0-2-0504

005

1-2.

Auto

Shut-off

Mechanism

Operation.

.............244-4

{-3,

‘Block

Diagram

2-4

.e.%

ee.

See

[4°

External’

View:

+a.

dens

L=5..

Intéernak

Views

-Sek

Soe

Bee

Bae

DISASSEMBLY

2-1.

Case

(A)-and:(B)

Removal...

2-2.

Case(C)

Removal

.......-0

20-2

eee

2-3.

Complete

Circuit

Board

Removal...

2.2...

eee

3-4.

‘Motof-Removal.;

eco

RRO

Dee

9:5.

.Belt/Removalis

eat

hee

ESS

ele

2-6.

Midway

Pulley

Removal

...

2...

eee

2-7.

Rewind

Idler

Slide

Removal

.............00.-

0.250004.

2-8.

Fast

Forward

Plate

Removal.

.....

Sng

ifisa

gel

Bel

GET

2-9.

Take-up

Drum

Removal

2...

0 0

eee

ADJUSTMENTS

3-1.

Mechanical

Adjustments

....

2...

0-2

3-2.

Electrical

Adjustments/Measurements

.........-.--+-+2-4-

DIAGRAMS

4-1.

Schematic

Diagram.

220.6

eles

4-2,

Mounting

Diagrams...

...

2.2...

eee

453).

‘Level

Diagrams.

edie

ere

See

EXPLODED

VIEWS

TABLE

CONTENTS

5-1.

Exploded

View

(1)...

5:9 Exploded’

View

(2):

23s)

tye

pee

5-3.

Exploded

View

(3)

ce ee

Dil;

S24.

‘Packing

cox.

fos

sea

pele

alee

ehh

BMA.

ELECTRICAL

PARTS

LIST

..............

2.202.000.0058.

1-1.

SECTION

OUTLINE

SERVO

CONTROL

CIRCUIT

OPERATION

Stage/Control

Frequency

generator

(FG)

Discriminator

Q101

Function

This

generator

coaxially

cou-

pled

with

motor.

The

frequency

varies

direct

proportion

the

motor

rotation.

Active

high-pass

filter

consisting

Q101,

C101,

C102,

R103,

R104

and

R108

discriminates

the

output

FG.

When

the

input

frequency

in-

creases,

the

output

the

dis-

criminator

increases,

vice

versa.

filter

output

(V)

to)

440

re:

frequency

{Hz}

Fig.

1-1.

Filter

characteristics

Stage/Control

Speed

control

R101

filter

output

(V)

Function

This

control

shifts

the

filter

char-

acteristics.

Fig.

1-2.

Voltage

stabilizer

D101

Rectifier

D102,

D103

Direct

coupled

amplifier

Qi02,

Q103,

Q104

frequency

(Hz)

Shift

filter

characteristics

This

diode

stabilizes

B+

voltage

for

Q101

and

Q102.

These

diodes

rectify

the

output

the

discriminator

voltage

doubler.

This

amplifier

amplifies

com-

ponent

rectified

D102

and

D103

control

the

motor

cur-

rent.

Since

the

output

from

not

available

when

starting

the

motor,

component

ap-

plied

QI02

base

turn

Q102

off.

Since

Q103

base

voltage

high

B+

voltage,

Q103

and

Q104

are

conductive

start

the

motor.

Qing,

103,

194

AME

Cig

C192

—

R103

Fig.

1-3.

Outline

servo

control

circuit

1-2.

AUTO

SHUT-OFF

MECHANISM

OPERATION

TC-42

mechanism

designed

that

the

unit

will

shut

itself

off

automatically

tape

end

record

playback

mode.

Gears

gear

block

ass’'y

and

gear

are

not

mesh

long

tape

remains

the

spindle

record

playback

mode.

tape

tension

pick-up

FWD/STOP

knob

ITNT

“

HATHA

tape

end

record

playback

mode.

Tape

tension

pick-up

detects

tape

tension

and

gears

gear

block

ass'y

are

moved

mesh

with

Turning

force

gear

trans-

mitted

gear

and

jut

gear

pushes

function

lever

ass’y

shown

the

arrow.

function

lever

ass’y

After

automatic

shut-off

operation

the

unit

placed

stop

mode.

RPH

SERVO

CONTROL

CIRCUIT

MOTOR

Note:

Ref

Switch

Mode

TRCOd

Gack

play

back

pause

START

MONITOR

WVYSDVIG

ND018

“EL

1-4.

EXTERNAL

VIEW

X-3538-510-0

button

ass’y,

REC

X-3538-509-0

button

ass’y,

REW

X-3§38-508-0

button

ass’y,

FF/CUE

3-538-524-00

‘2g

knob,

FWO/STOP

——

1-520-

198-00

meter,

REC/BATT

3-528-004-00

pied

bade

button,

EJECT

8-814-190-10

electret

condenser

microphone

3-538-523-00

knob,

pause

1-507-169-13

jack,

mini;

MONITOR

1-507-127-00

jack,

external

power

1-507-195-13

jack,

REMOTE

1-507-169-1232

jack,

mini;

MIC

1-5.

INTERNAL

VIEW

CHASSIS

—

Top

View

—

8-829-336-00

head,

record/play

back

(PP

134-36}

X-3515-005-0

pinch

roller

ass’y

8-825-566-00

head,

erase

(EBF

5-028)

X-3515-015-0

3-528-084-00

spindle

ass’y,

take-up

reel

spindle,

supply

reel

-~6—

CHASSIS

—

Rear

View—

1-§14-264-00

switch,

slide:

cue

(S4)

X-3515-008-0

flywheel

{A)

ass‘y

X-3515-016-0

3-480-

135-00

pulley

ass’y,

midway

Bales

3-480-136-00

belt

(8)

A-3070-006-A

complete

circuit

board,

amp/osce

1-514-346-00

X-3480-006-0

switch,

leaf:

power

(S3)

flywheel

(8)

ass’y

2-1.

CASE

(A)

AND

(B})

REMOVAL

Remove

the

four

screws

5).

case

(A)

Remove

the

battery

case.

Pull

off

the

FWD

©)

Remove

the

upper

button.

panel.

GB)

Remove

the

screw

8).

Remove

the

two

screws

10).

upper

panel

case

(B)

Remove

the

two

screws

8).

2-2.

CASE

(C)

REMOVAL

Remove

the

two

screws

4).

case

(C}

2-3.

COMPLETE

CIRCUIT

BOARD

REMOVAL

Servo

Control

Circuit

Board

Amp/Osc

Circuit

Board

Remove

the

screw

1.7

2.5).

Note:

not

touch

the

circuit

board

terminal

strip.

Remove

the

three

Remove

the

screw

screws

5).

(P2x

5).

2-4.

MOTOR

REMOVAL

2-5.

BELT

REMOVAL

Unhook

the

bei/t

from

motor

pulley.

peg

Remove

the

screw

(P2x

3}.

thrust

retainer

Remove

the

screw

(P2x

3).

Remove

the

circuit

;

board

support

{A}.

Push

out

the

motor.

2-6.

MIDWAY

PULLEY

REMOVAL

2-8.

FAST

FORWARD

PLATE

REMOVAL

: :

)

Remove

the

two

Remove

the

retaining

Unhook

the

tension

retaining

rings

(C-2).

ring

(C-2).

spring.

Remove

the

rewind

lever.

Unhook

the

tension

spring.

——

)

Remove

the

screw

1.7

2.5).

midway

pulley

ass’y

Remove

the

slide

switch

operating

lever.

Remove

the

retaining

rings

(C-2).

Remove

the

forward

lever.

Remove

the

fast

forward

plate

ass’y.

Unhook

the

tension

spring.

2-7.

REWIND

IDLER

SLIDE

REMOVAL

Remove

the

torsion

Remove

the

retaining

‘

spring.

ring

(C-2).

2-9.

TAKE-UP

DRUM

REMOVAL

Remove

the

retaining

Remove

the

retaining

Unhook

the

ring

(C-2).

ring

(C-2).

tension

spring.

(4)

Remove

the

flywheel

(B)

ass’y.

Remove

the

rewind

idler

slide

ass‘y

along

with

rewind

idler

lever

ass’y.

(4)

Remove

the

boss.

Remove

the

screw

1.7

2.5).

©)

Remove

the

take-up

drum.

GQ)

Set

the

function

button

FWO

—~10—

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