Sony CFS-204 User manual

Frequency

range

AEP

model

Italian

model

Recording

system

Frequency

response

Speakers

Power

output

Output

Power

requirements

Power

consumption

87.6—107MHz

531

—1,602kHz

87.5—-108MHz

SPECIFICATIONS

526.5—1,606.5kHz

4-track

2-channel

stereo

80Hz—8,000Hz

Full-range:

10cm

inches)

dia.

2.3W+2.3W

(at

10%

harmonic

distortion)

operation

Headphones

jack

(stereo

minijack),

16-68

ohm

impedance

220V

AC,

50Hz

DC,

six

R14

(size

batteries

14W

Model

Name

Using

Similar

Mechanism

Tape

Trasport

Mechanism

Type

Battery

life

;

AEP

Model

CFS-W304

MF-204-64

“FM

recording

Sony

SUM-2

(NS)

Approx.

hours

Sony

AM2

alkaline

Approx.

hours

Dimensions

Approx.

460

145

X160mm

(w/h/d)

(18'/,

53/,

63/,

inches)

incl.

projecting

parts

and

controls

Weight

Approx.

2.4kg

oz),

incl.

batteries

Accessory

supplied

power

cord

(1)

Design

and

specifications

subject

change

without

notice.

SAFETY-RELATED

COMPONENT

WARNING!!

COMPONENTS

IDENTIFIED

MARK

DOTTED

LINE

WITH

MARK

THE

SCHEMATIC

DIAGRAMS

AND

THE

PARTS

LIST

ARE

CRITICAL

SAFE

OPERATION.

REPLACE

THESE

COMPONENTS

WITH

SONY

PARTS

WHOSE

PART

NUMBERS

APPEAR

SHOWN

THIS

MANUAL

SUPPLEMENTS

PUB-

LISHED

SONY.

RADIO

CASSETTE-CORDER

CFS-204

SECTION

DISASSEMBLY

Note

the

disassembly

procedure

the

numerical

order

given.

1-1.

REMOVAL

CASSETTE

HOLDER

Remove

the

cassette

holder

shown

arrow

1-2.

DIAL

POINTER

SETTING

Set

the

pointer

the

center

‘\

seracthed

lines.

—

Turn

tuning

knob

fully’

the

direction

the

arrow.

—2—

SECTION

MECHANICAL

ADJUSTMENTS

PRECAUTION

Clean

the

following

parts

with

denatured-alcohol-

moistened

swab:

record/playback

head

erase

head

pinch

roller

rubber

belts

capstan

idlers

Demagnetize

the

record/playback

head

with

head

demagnetizer.

(Do

not

bring

the

head

demagnetizer

the

erase

head.)

not

use

magnetized

screwdriver

for

the

adjustments.

After

the

adjustments,

apply

suitable

locking

compound

the

parts

adjusted.

| |

The

adjustments

should

perfomed

with

the

rated

power

supply

voltage

unless

otherwise

noted.

Power

supply

voltage:

dc.

Torque

Measurement

—

-20~60g*em

Forward

2—-6g*cm

_(0.028—0.083

0z+inch)

Fast

than

45g*-cm

ante

(more

than

0.62

oz*inch).

—

CQ2018

rein

giana

(more

than

0.62

oz+inch)

Tape

Tension

Measurement

than

70g

{more

than

2.47

oz)

CFS-204

SECTION

ELECTRICAL

ADJUSTMENTS

3-1.

TAPE

RECORDER

SECTION

—

Standard

Output

Level

Output

terminal

OUT

(dB)

0250

(1086)

Test

Tape

Speed

Adjustment

Procedure

speed

checker

Mode:

playback

LFEM-30

eee

test

tape

digital

frequency

WS-48A

counter

(3kHz,0dB)

headphones

jack

Adjustment

Value:

Speed

checker

Digital

frequency

cou

nter.

Frequency

difference

between

the

beginning

and

the

end

the

tape

should

within

(30Hz).

Adjustment

Location

tape

speed

adjustment

contro!

inside

motor

CFS-204

3-2.

RADIO

SECTION

@FM

Section

Setting

FUNCTION

switch:

_FM

signal

generator

telescopic

antenna

input

terminal

22.5kHz

frequency

deviation

400Hz

signal

output

level:

low

possible

Section

Setting

FUNCTION

switch:

signal

generator

Put

the

lead-wire

antenna

the

set.

30%

amplitude

modulation

by.

400Hz

signal

output

level:

low

possible

VTVM

trange:

0.5—5V

ac)

Headphones

jack

Repeat

the

procedures

each

adjustment

several

times,

and

the

frequency

coverage

and

tracking

adjustments

should

finally

done

the

trimmer

capacitors.

@®

Remove

telescopic

antenna

section

adjustments.

FREQUENCY

COVERAGE

ADJUSTMENT

Adjust

for

maximum

reading

VM.

AEP:

87.6MHz.

AEP:

107.0MHz

IT:

87.35MHz

IT:

108.3MHz

TRACKING

ADJUSTMENT

Adjust

for

maximum

reading

VM.

AEP:

87.6MHz

AEP:

107.0MHz

IT:

87.35MHz

IT:

108.3MHz

FREQUENCY

COVERAGE

ADJUSTMENT

Adjust

for

maximum

reading

VM.

AEP:

520kHz

AEP:

1,680kHz

IT:

516kHz

IT:

1,630kHz

AM-TRACKING

ADJUSTMENT

Adjust

for

maximum

reading

VTVM

600kHz

1,400kHz

ADJUSTMENT

Adjust

for

maximum

reading

VTVM.

—

. |

455kHz

eT:

Italian

model

CFS-204

vco

Adjustment

Procedure:

signal

generator

telescopic

antenna

input

terminal

Carrier

frequency

98MHz

Modulation

modulation

Output

level

0.1V

(100dB)

Connect

frequency

counter

shown

below.

Tune

the

set

98MHz.

Adjust

RV1

for

76kHz+500Hz

reading

the

frequency

counter.

tuner

board

(conductor

side)

AUDIO

BOARD

KH301

frequency

counter

|-634-194-

Adjustment

Location

tuner

board

(component

side)

telescopic

antenna

input

terminal.

ADJ

CT3

FREQUENCY

[ce

-L4

}

COVERAGE

COVERGE

ADJ

G71

}

TRACKING

ADJ

RVI

VCO

ADJ

CFS-204

SECTION

DIAGRAMS

4-1.

PRINTED

WIRING

BOARD

—TUNER

SECTION—

ANT

TELESCOPIC

ANTENNA

[TUNER

BOARD]

£3

FERRITE—-ROD

AUDIO

BOARD

KH30i

(See

page

9.)

;

1634-194

Block

Diagram

Note:

| | |

ICl

CXA1238S

o—

parts

extracted

from

the

component

side.

FRONT-END

| |

res

rront-enp

a . .

Lee

OR?

{

IFS

DUSCRI

1/2

(01)

<oe

| |

02)

IF/DET

COUNTER

AUTO

BLEND

TUNING

NDICATOR

MON

SELECT

MUT

ING

BAND PASS

DECORD

RIPPLE

MUTE

AMP

FILTER

O~@

4-2.

SCHEMATIC

DIAGRAM

—TUNER

SECTION—

410

4-3.

SEMICONDUCTOR

LEAD

LAYOUT

BA3420AL

2SC1815-GR

2$C2001-K2

TELESCOPIC

ANTENNA

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es)

4.7p:

(IT)

9p-(IT)

1$S$119

ins

Te)

cathode

220p

¥:B

WSTFERRITE-ROD

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ANTENNA

nie

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Soi.

eee

aes

DTC114YS

10E2

FEOUT

GNOFE

AMIN

FMRF

REG1.25V

OSC

AFC

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MUTE

{

vco

MPXREG

PLLLPF

GND

Bs!

eeindae

FMO)SCRI

BAND

RIPPLE

SELECT

AGC_AFC

FILTER

VCO

CHECK

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]

1.25(0)

eee

680

CFI

seueen

—_

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2SA1175-HFE

IFT

GL-3PR9

CF2

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R10

short

FM/AM

F.E,

DET

MPX

AUDIO

BOARD

KH301

(See

page

11.)

onode

cathode

SWITCH

Note:

All

capacitors

are

unless

otherwise

noted.

pF:

uwuF

SOWV

less

are

not

indicated

except

for

electrolytics

and

tantalums.

All

resistors

are

and

'/,W

less

unless

otherwise

specified.

internal

component.

Power

voltage

and

fed

with

regulated

power

supply

from

battery

terminal.

Voltages

are

with

respect

ground

under

no-signal

(detuned)

conditions.

mark:

(

Voltages

are

taken

with

VOM

(Input

Impedance

10M

2).

Voltage

variations

may

noted

due

normal

produc-

tion

tolerances.

Signal

path.

:FM

IT:

Italian

model

4-4.

PRINTED

WIRING

BOARDS

—AUDIO

SECTION—

J30!

RED

SP902

SPEAKER

Ss)

R-CH

OPR/

BATT

MIC3OI

[MAIN

BOARD]

TUNER

BOARD

CNU2I

(See

page

6.)

RED

SP90I

SPEAKER

beCH

$302

FUNCTION

TAPE/

RADIO

OFF

$306

MODE/ISS

9g)

STEREO

iSS2

MONO

"eel

AAR

ete

O—-:

parts

extracted

from

the

component

side.

REC

Pid

ERE

: ,

‘

Or:

are

gay

gave

;

REC

SOLS

arate

ane

sestanaa

;

eee

: f : : 3 : : ?

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5 :

;

}

;

saya

: j

reins

ert

inca

Bae

CES

he,

;

sna

: /

: :

HRP901

2 ;

‘

POR

: :

‘

as:

ces

REC/PB

HEAD

(POWER

BOARD]

[SWITCH(A)

BOARD}

TRANS

M90!

MOTOR

SIZE

'C"

(IEC

DESIGNATION

R14)

™

ORY

BATTERY

6PCS,

aati

-634-196-

|-~634-195-

4-5.

SCHEMATIC

DIAGAM

—AUDIO

SECTION—

(MAIN

BOARD]

| |

5301-4

PB-»REC

]

HRP

REC/PB

HEAD

_—_

‘

HESOI

ERASE

HEAD

{[°

9 10

TUNER

BOARD

(See

page

8.)

CNJ2I

Cs)

STEREO

—>

MONO

0304

—-R308_-R304

5303-2

1IS2473

7S.

PREAMP

(ieee

POWER

AMP

10302

TA8207K

$301-|

—t

REC

C317

100p

R301

0°392

RiI0

Bet

22k

1C301

C318

100p

R102

1.5k

C112

10005

C212

1000p

R103

$302

croo

FUNCTION

2200p

TAPE

—>

RADIO

OFF

[B+

+9V.

VEC

+3V,

STANO

Lees

0O.!

43)

B+,

Q303

25C2001-K

REG

0.6

| |

(5)

(SWITCH(A)

BOARD]

eaWER

Seen

Bo,

0801-804

1N4002

BIAS

OSC

53043

Q30!

Q302

VY¥V

$303-1

V_¥

BIAS

OSC

BIAS

OSC

SWITCH

[iss]

1SS1-1582

PB-REC

ewe

reer

rem

—11—

—12—

POWER

AMP

1C302

TA8207K

Azan

C112

10002

CNPI

C212

1000.

060

Mo-

$302

TAPE

—>

RADIO

OFF

;

AAA

NAL

DBO!

—

804

1N4002

[b+

8.7

R109

()

’

say

6.3

‘ale

C216

“Oy

phy

30!

SPEAKER

3(|

L-CH

;

eae

SPEAKER

—-s\

—F

aos

pot

0301

R31

820

SLR-34VR

OPR/

BATT

TOTAL

CURRENT

FM:

48mA

AM:

46mA

CNJBOI

PLAY:

96mA

[N00

REC:

118mA

POWER

TRANSFORMER

:103mA

REW:

37mA

DRY

BATTERY

SIZE"

G™

(1EC

DESIGNATION

RI4)

6PCS,9V

‘

Note:

All

capacitors

are

unless

otherwise

noted.

pF:

uur

5OWV

less

are

not

indicated

except

for

electrolytics

and

tantalums.

All

resistors

are

and

'/,W

less

unless

otherwise

specified.

Note:

The

components

identified

mark

dotted

line

with

mark

are

critical

for

safety.

Replace

only

with

part

number

specified.

Power

voitage

and

fed

with

regulated

power

supply

from

battery

terminal.

Voltages

are

with

respect

ground

under

no-signal

(detuned)

conditions.

mark:

PLAY

(

REC

Voltages

are

taken

with

VOM

(Input

Impedance

10M).

Voltage

variations

may

noted

due

normal

produc-

tion

tolerances.

Signal

path.

:FM

>».

:PB

yy»)

REC

IT:

Italian

model

CFS-204

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