Sony CRF-150 Manuel utilisateur

ЧЕН

FM/AM

13-BAND

PORTABLE

RADIO

SONY.

SERVICE

MANUAL

‚Section

TABLE

CONTENTS

Title

TECHNICAL

DESCRIPTION

1-1.

Specifications

Technical

Features

13.

Circuit

Description.

14.

Block

Diagram

1-5.

External

View

1-6.

Major

Parts

Location

DISASSEMBLY

mes

2-1,

Chas

Removal.

22.

Tuner

Removal

23.

Tuner

Removal

ср/М

Circuit

Removal

........

2-5

Power

Supply

Circuit

Board

Removal

2-6.

Circuit

Board

Removal

2-7.

Dial

Scale,

Dial

Drum

Removal

and

Reassembly

24.

Dial

Cord

Restringing

ADJUSTMENT

PROCEDURES...

3-1.

Alignment

3-2.

Frequency

Coverage

and

Tracking

Adjustment

3-3.

Adjusting

Parts

Locations

3-4.

Voltage

and

Current

Adjustment

SCHEMATIC

AND

MOUNTING

DIAGRAMS

4-1.

Schematic

Diagram

4-2.

Tuner

Circuit

Board

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

43.

SW2-SW10

Front

End

PNE

4-4.

Cp/if

Circuit

Board

4-5.

Circuit

Board...

4-6.

Power

Circuit

Board

47.

Jack

Panel

эз

4-8.

Wiring

Diagram

ELECTRICAL

PARTS

LIST

.....

PACKING

AND

EXPLODED

VIEW

........

61.

Packing

6-2.

Exploded

View

SONY.

SERVICE

MANUAL

SUPPLEMENT

SErrewoen,

1970

Subject:

Troubleshooting

guide

USA

model

31,800

02718

ааа

and

lat

GENERAL

EXPORT

“

}

model

42,420

TROUBLESHOOTING

GUIDE

Trouble

Band

Symptom

Сане

Remedy

sound

1)08V

higher

Leaky

tuning

Apply

20У

between

(Af

circuit

the

emitter

capacitor

the

rotor

and

the

stator

normal

but

0304.

(06

the

tuning

capacitor

sound

normal)

Produce

spark

from

speaker.)

№

sound

even

Defective

bar

antenna

Replace

the

сой.

"the

bar

сой

antenna

сой

adjusted

Collector

voltage

Internal

resistance

Replace

the

tuning

meter

Q306

too

—

the

tuning

meteris

too

low.

(2.75V

high

normal)

Sw2-10

sound

the

Shorted

padding

capac

Replace

these

capacitors

high-frequency

end

itor.

(C247,

C250,

each

band

C256,

C259,

C262

Normalsoundatthe

C268,

C271)

low-frequency

end

Low

Noise

heard

during

Antenna

lead

(coaxial

Resolder

the

lead

sensitivity

reception

cable)

tuner

touches

the

tuner

case.

sui

Great

difference

Yellow

lead

the

switch

Resolder

the

ead.

noise

level

be:

connected

ground.

tween

SHARP

and

BROAD

positions

the

SELECTIV

TTY

switch

sw2-10

Noise

heard

all

over

3.8

4.1V

the

emit-

Adjust

R369

for

45V.

the

bands.

ter

Q309.

(45У

normal)

Shock

noise

Shield

plate

touching

Separate

the

shield

plate

noise

the

printed

circuit

from

the

printed

circuit

board board

Shock

noise.

Leads

capacitors

Cover

the

legs

of these

mounted

the

сот

capacitors

with

plastic

ductor

side

are

touch

tubing.

ing

the

legs

IFT

Shock

noise.

Loose

contact

the

Replace

the

switch

pilot

lamp

switch.

Shock

noise

Loose

nut

the

EXT

Tighten

mut,

then

secure

ANT

terminal

with

contact

cement

Trouble

Band

Symptom

Cause

Remedy

Oscillation

Oscillating

noise

Coupling

between

Separate

1319

from

1319

and

СЕЗІ.

CF301

Oscillating

noise

°S”

curve

too

2)Lower

the

curve

sharply

adjusted

level

Oscillating

noise

Leads

from

the

tuner

Separate

the

leads

from

and

antenna

5301-2

the

printed

circuit

board.

disturb

stage.

Tuning

Pointer

does

not

Leaky

G77

between

Replace

C377.

meter

move.

IFT

F301

and

5301-8.

Minimum

pointer

R313

misadjusted.

Readjust

R313

for

0.25

movement.

028V

the

emitter

0303.

Wrong

Pointer

docs

mot

aide

Make

the

pointer

side

dal

properly.

smoothly.

pone

Incorrect

frequency

Readjust

the

frequency

indication

pem

Incorrect

frequency

Readjust

the

frequency

coverage.

Backlash

Loose

screw

the

Engage

gears,

and

tighten

double

gear.

the

screw.

sw2-10

Loose

core

the

first

Fix

the

core

with

oscillator

сой.

elastic

band,

replace

the

coil

Normal

when

Damaged

second

oscil-

Replace

the

сой.

the

core

the

Шогсой.

second

oscillator

coil

pulled

ош.

Unstable

392-16

reception

Faulty

beni

жаза

Repair

straighten

the

reception

when

the

band

іп

the

turret

tuner.

contact

selector

turned

counterclockwise.

Normal

тесер.

tion

when

these-

lector

ішпей

clockwise.

Reception

okay

Imperfect

solder

joint.

Resolder

the

defective

joint.

Battery

cur-

АШ

‘Shorted

0502.

Replace

0502

rent

flows

voltage

any

point

when

the

circuit.

power

sup-

ply

isop-

erating.

Reverse

Connect

the

cut

foil

with

operation

the

low

fre

CF302

and

CF303

cut.

jumper

lead.

the

quency

range.

SELECTIV-

ITY

switch.

tuning

Tight

dial

Defective

gear

Deepen

gear

teeth,

and

shaft

gear

apply

lubricating

oil

skips.

CRF-150

SECTION

TECHNICAL

DESCRIPTION

1-1.

SPECIFICATIONS

Circuit

System:

2-FET,

1Stransistor,

12diode

superheterodyne

Frequency

Coverage:

FM;

108

MHz

(344

—

278m)

1,605

kHz

(566

—

187m)

LW;

150

—

400kHz

(2,000

—

750m)

SWI;

18—45MHz

(187

—

67m)

-5змн:

(64

—

57m)

SW3:

58-64MMz

(52

47m)

SW&

7.0

~7.6MMz

(43

39m)

SWS;

10.1

MHz

(31.6

—

30m)

116

12.2MHz

(26

—

24.6)

15.0

—

156мнг

(20—

192m)

175

18.1

MHz

(17

—

165m)

SW;

214-

220MM:

(14

—

136m)

SW10;

255

26.1Mkz

(118

115m}

Intermediate

Frequency:

FM:

10.7

MHz

MW,

LW,

SWI;

456

KHz

SW2—SW10;

Ist:

1.55

225

МН

‘nd:

ASS

kHz

Antenna

System:

FM;

telescopic

antenna

external

antenna

(impedance

3002)

MW,

LW;

built-in

ferrite

bar

antenna

external

antenna

(nigh

impedance)

50:

telescopic

antenna

external

antenna

(high

impedance)

‘SW2—SW10;

telescopic

antenna

external

antenna

(impedance

752)

FM;

тыу

(0881

MW;

25.12

V/m

(2848/m)

LW;

39.84V/m

(3248/m)

SWI;

тыу

(048)

SW2-SWIO:

14V

(048)

Selectivity:

—

4098

1400kHz

HOkHz

off

resonance

Power

Requirement:

Six

"О"

size

flashlight

batterie

volts

total,

house

current

(ae

100V,

117V,

220V,

240V)

'ower

Output

10%

distortion:

2.7W

(with

power

supply),

1.1W

(with

battery)

maximum:

38W

(with

power

supply),

1.7W

(with

battery)

Current

Drain

zero

signal:

78mA

(with

power

supply),

(with

battery)

soon

saka

-4одв

(048

0776У)

тоқа

-6048

(048

0.775V)

Speaker:

3747

(Bem)

614"

(16em,

هه󰾯

Dimensions:

1334"

(W)

10!%e"

(H)

S14”

(D)

(340mm

275mm

144mm)

Weight:

(79)

150

1-2.

TECHNICAL

FEATURES

High-performance

portable

radio

receiver

with

thirteen

bands;

FM,

MW,

LW,

SWI-SWIO.

FET

(field

effect

transistor)

with

tripletuned

passive

input

circuit

for

superior

interference

rejection.

High-sensitivity

and

selectivity

bands

using

double-superheterodyne

front

end.

High-fidelity

amplifier

with

OTL

circuit.

Choice

three

power

sources;

house

current,

battery,

car

battery.

1:3.

CIRCUIT

DESCRIPTION

Stage/control

Function

Tuner

FET

mixer

Usually

front

end

consists

ото!

amplifier,

mixer

and

local

oscillator

shown

Fig.

I1.

The

amplifier

sometimes

worsens

the

crossmodulation

handling

ability

the

receiver

when

ordinary

bipolar

transistors

are

used,

is,

however,

diffi

cult

eliminate

the

amplifier

because

its

removal

causes

strong

spurious

radiation,

poor

sensi-

tivity,

and

poor

noise

figure.

solve

this

problem,

the

Model

Fig.

1-1

Usual

front

end

Fig.

CRF-150

front

end

Local

oscillator

0102

Afc

diode

D101

amplifier

0103

CRF-150

uses

low-noise

junc-

tion

FET

for

the

mixer

and

triple-tuned

passive

input

circuit

shown

Fig.

1-2.

The

Model

CRF-150

capable

clear

reception

even

strong

signal-

strength

areas

due

the

extremely

superior

interference-

rejection

characteristics

the

passive

input

circuit,

The

oscillator

generates

fre-

quency

10.7

MHz

higher

than

the

incoming

signal

frequency

and

injects

the

generated

voltage.

the

source

FET

mixer

0101.

This

diode

connected

across

the

resonant

circuit

the

oscil-

lator

and

works

variable-

capacitance

diode.

feed

back

voltage

from

the

discri

nator

controls

the

bias

applied

the

diode

keep

the

local

oscillator.

frequency

correct.

Transistor

Q103

amplifies

the

10.7

MHz

i-f

signal

produced

mixer

0101

and

coupled

through

transformer

IFT

101.

block

diagram

the

front

end

shown

Fig.

1-3.

Such

arrangement

effectively

sup-

presses

image

signals,

since

the

high

value

the

first

causes

the

desired

and

image

signals

differ

greatly

frequency.

the

same

time,

the

relatively

low

value

the

second

makes

possible

obtain

high

amplifi-

cation

well

sharp

discrimi-

mation

against

signals

differing

only

slightly

frequency

from

the

desired

signal.

The

result

that

this

double-

superheterodyne

front

end

pro-

vides

combination

greater

image

suppression

and

higher

adjacent

channel-selectivity

than

can

realized

simple

super-

heterodyne

receiver.

stage󰾰

سأ

чае

ESE

Fig.

1:3

Block

diagram

the

front

end

Age

amp

‘The

age

(automatic

gain

control)

0202

Circuit

consists

transistor

0302

Q202

and

diode

0302.

The

carrier

from

the

last

stage

the

amplifier

adds

negative

арс

voltage

the

positively-biased

base

transistor

Q202

through

diode

D302

shown

Fig.

1-4.

озо!

Me,

mal

ome

gal

Fig.

1-5

Output

waveform

the

age

Strip

Ist

mixer

Q301

combines

the

signal

озо!

applied

its

base

with

the

oscil-

—

lator

voltage

(1.55

2.25

MHz

higher

than

incoming

signal)

applied

its

emitter

for

conver

sion

the

1.55

—

2.25

MHz

Ist

Fig.

1-4

Diagram

the

age

Аз

the

signal

becomes

stronger,

the age

level

becomes

higher

tst

0303

amplifies

three

sig-

sito:

amplifier.

mals;

1.55

2.25

MHz

(SWI

—

decortindy;

the;

collier

SWIO),

$20

—

1,670

kHz

(MW),

current

Q202

and

the

drain-

MW,

254 145

410

(LW):

current

0201

decrease.

amplifier

the

signal

small,

0202

0303

increases

the

gain

amplifier

Q201

and

the

desired

sensitivity

2nd

oscillator

0304

generates

frequency

455

obtained

shown

Fig.

1-5.

0304

kHz

higher

than

the

signals

that

this

way,

the

gain

controlled

come

from

0303.

automatically.

Q302

amplifies

the

10.7

MHz

1st

focal

‘The

oscillator

generates

fre-

amplifier

signal

coupled

through

quency

1.55

—

2.25

MHz

higher

0302

ceramic

filters

CF301

and

than

the

incoming

signal

fre-

CF302.

Also,

the

saturation

quency,

and

injects

the

gener-

due

high

base

emitter

bias

ated

voltage

the

emitter

clips

the

negative

peak

the

Q301.

Тһе

oscillator

fre-

signal

voltage

developed

quencies

are

fixed

each

band.

the

collector

Q302.

CRF-150

Limiter

This

diode

clips

the

positive

D301

Peak

signal

voltage

devel

oped

the

collector

0305.

0305

amplifies

10.7

MHz

amplifier.

signal,

Also,

0305

produces

455

kHz

signal

its

2nd

mixer

conector,

0305

Power

Supply

Fig

Selectivity

selection

circuit

Тһе

CRF-150

uses

4-pin

cord

for

its

power

Asi

supply

and

has

powerin

jack

for

house

current

100V,

117V,

220V

and

240V

(for

USA

model

117V

VOLUME

control

The

level

signal

applied

only).

However,

using

the

SONY

DCC-2A

Car

VR601

the

power

amplifier

deter-

tery

Cord

standard

flashlight

batteries

(six

size

mined

the

setting

VR601.

"D"

cells),

the

CRF-150

can

operated

away

from

ап

ас

power

outlet.

Though

diode

0502

prevents

Amplifier

‘Transistor

Q401

amplifies

the

reverse

current

flow

through

the

batteries

when

0401

audio

signal

supplied

using

house

current

car

battery,

better

VOLUME

control

VR601.

remove

the

flashlight

batteries

they

will

not

used

for

while,

Audio

driver

These

direct-coupled

stages

0402,

0403

amplify

the

audio

signal

supplied

TREBLE

control

VR602

and

BASS

control

VR603,

Sensitivity

Selector

‘The

stage

selectivity

obtained

using

Power

amplifier

This

stage

uses

OTL

(output

ceramic

filter

(CF304)

frequency-selective

0404,

0406

transformerless)

push-pull

class-B

by-pass

centered

455

kHz.

This

gives

transistor

amplifier,

Thermistors

CS401

Q304

high

gain

455

kHz

preventing

emitter

and

CS402

temperaturecompen-

degeneration

the

signal

this

frequency.

Ву

sate

the

base

bias

Q404

and

connecting

capacitor

C372

parallel

with

filter

0405.

СЕЗ04

(See

Fig.

1-6),

the

BROAD

selectivity

band-

Negative

feedback

from

the

out-

width

obtained.

When

the

SHARP

position

set,

put

0404

and

0405

the

bandwidth

becomes

narrow.

However,

greater

emitter

0403

improves

the

sensitivity

with

less

noise

obtained

and

weak

frequency

response

and

reduces

signal

can

easily

heard,

distortion,

1-4.

BLOCK

DIAGRAM

Fig

CRF-150

EXTERNAL

VIEW

3419372.

andis,

carrying.

383391].

emblem

"Sony

3835842.

knob,

calibrator

—|

ning

meter

dial

tuning

1607-16913

Jack,

earphone’

56:

—

Bar

A»

band

selector

1514-50311

тмин)

witch,

power

knob,

selectivity

Fig.

1:8

MAJOR

PARTS

LOCATION

—

1502241

‘speaker

401-38-23

ant

сой,

mwlw

ferrite

bar

Y38519.11

tuner

block

Y-3871201-1

3833895-

tuner

block

escutcheon,

SW2-SWIO

Bond

selector

152616511

voltage

selector.

153926411

printed

circuit

board,

1614304:

Power

supply.

Hide

switch

15026212

180936211

printed

circuit

board,

Connector,

ext

Eolit

power

supply

144153612

transformer,

power.

X3813806.

Jack

panel

агу

Fig.

1-9

СВЕ-150

SECTION

DISASSEMBLY

21.

CHASSIS

REMOVAL

Pull

off the

six

knobs

shown

Fig.

2-1

Remove

the

two

screws

and

carrying

handle

shown

Fig.

2-1

calibrator

ЖА

trotume

and

tone)

tuning

knots

(ate

and

EM)

Fig.

2-1

Remove

the

battery

lid

and

take

out

batteries

and

cord.

Remove

the

three

screws

shown

Fig.

2-2

Fig.

Remove

the

four

screws

marked

which

fasten

the

front

panel

the

chassis

Fig.

23.

Loosen

screw

marked

and

remove

the

telescopic

antenna.

Remove

the

speaker

socket

shown

Fig.

2-3,

Now,

the

front

panel

removable

shown

Fig.

24.

Remove

the

three

screws

and

two

rubber

foots

shown

Fig.

2-4

speaker

Socket

Fig.

3x20

27.2420

Fig.

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