Sony CRF-5080 User manual

Circuit

System:

Frequency

Coverage:

intermediate

Frequency:

Antenna

System:

Sensitivity

output,

S/N

dB:

SPECIFICATIONS

13-transistor

8-diode

superheterodyne

G-transistors

and

diode

for

auxiliary

circuit

87,5

108

MHz

(3.42

—

2.78

150

—

400

kHz

(2,000

—

750

530

—

1,605

kHz

(566

—

187

4.6

—

3.5

MHz

(187

—

3.5

—

9.0

MHz

(86

—

9.0

—

14.0

MHz

(33

—

MHz

{21

—

14m)

SWS

MH2

(14

—

10.7

MHz

LW/MW/SW-

485

kHz

telescopic

antenna

external

antenna

(impedance

$2}

LW/MW._

built-in

ferrite

bar

antenna

external

antenna

(high

impedance)

telescopic

antenna

external

antenna

{

high

impedance

}

0.7

(-3.48)

BV/m

(36

dB/m)

UV/m

(27

d8/m)

1.2

pV!

(18)

TMV

dB)

BVO

dB)

1.2

GB}

4.3MV

cB}

Selectivity

kHz

off-resonance:

Power

Output

distortion:

maximum:

Current

Drain

zero

signal:

maximum:

Power

Requirement:

‘Speaker:

Dimensions:

Weight:

1,400

kHz

1.8W

2.7W

mA,

320

eight

“’D”"

size

flashlight

batteries

volts

car

battery

using

SONY

car

battery

cord

DCC-2AW

house

current

100

120

220

240

VAC;

50 Hz

(4"

6},

340

(W)

230

{H)

160

(D)

36"

3G"

9G"

6.6

{14

oz)

overall

with

batteries

SON

SERVICE

MANUAL

CRF-50

TABLE

CONTENTS

Section

Title

Page

Section

Title

Page

Specifications...

.......5

OUTLINE

3-2,

AMIfAlignment.........

33,

Bfo

Osc

Coil

Adjustment...

Fel.

Block

Diagram...

22.00.

ose

Coll

Adiurment

a2)

3-4.

Frequency

Coverage

and

Tracking

12.

External

View...

2.000005

Adjustment,..........

DISASSEMBLY

AND

REASSEMBLY

DIAGRAMS

2-1.

Front

Panel

Removal.

22.

ChassisRemoval.....

0...

Eprucavaivan

bees

2-3.

FMFrontEnd

Removal...

...

ala

2-4,

FMFront

End

Reassembly.

25.

Dial

Scale

Reassembly

EXPLODED

VIEW

AND

PACKING

2-6,

Circuit

Board

Removal

5-1.

Exploded

View

(1).

2...

2-7,

Dial

Cord

Stringing.

5-2,

Exploded

View

(2)...

0.0...

$3.

Packing...

2...

eee

CIRCUIT

ADJUSTMENTS

al.

FMUf

Alignment

.........

ELECTRICAL

PARTS

LIST.......

Hardware

Nomenclature

—

Pan

Head

Screw

.........

-@®

(E5_

—

Retaining

Ring

Washer)

or)

—

Flat

Countersunk

Head

Screw

Washer

—

Binding

Head

Screw

.........

Biainiple

—

Spring

Washer

—

Oval

Countersunk

Head

Screw

.(9)

fipseaisist

Pane

Truss

Head

Screw

0.2...

eraxt0

Bre

Round

Head

Screw

........-

Length

(L)

”

Flat

Pillister

Head

hat

Feilhi:

lead

Screw

aeieitec

Diameter

(D)

l_--l

Set

Screw

.......

0.0.

cece

Type

Head

When

ordering

replacement

parts,

you

should

use

PART

NUMBER

listed

the

Parts

List

shown

the

EXPLODED

VIEW.

The

reference

number

should

not

used

for

ordering

purposes.

eRE-5080

SECTION

OUTLINE

1-1.

BLOCK

DIAGRAM

AFC.

207

AMP.

LOAAWIS

MIX

9202

METER

GAIN

CONTROL

0210

METER

AMP

TUNING

METER

+or

+82

POWER

AMP

1-2,

EXTERNAL

VIEW

1-501-129

X:38424-88-1

: R

antenna,

telescopic

caver

ass’y,

dial

}

3842-437

button,

LIGHT

1-§14-729-41

1-514-866

switch,

AFC

switch,

POWER

BFO

X-38424.81

3-842-464

GAIN

ees

knob

ass’y,

BAND

SELECTOR

knob,

controt

‘|

TONE

VOLUME

3842-466

3-842-440

knob,

tuning

emblem,

“SONY”

X-38424-82

knob

ass’y,

FINE

TUNING

CRF-5080

SECTION

DISASSEMBLY

AND

REASSEMBLY

2-1,

FRONT PANEL

REMOVAL

remove

tront

cover,

pull

either

front

cover

stiding

shaft

toward

inside

and

slide

the

front

cover

out.

Unsolder

the

three

speaker

leads

(YEL

and

Two

BRN)

terminal

strip.

screw,

BB2x4

screw,

®B

2x8

CRF-508¢

SECTION

OUTLINE

1-1.

BLOCK

DIAGRAM

TEL

Eas

ANT

u/s

20%

PME

AMP.

LWASWISW

MIX

+at

0208,

0209

RECTIFIER

CAR

BATT,

0212,

0213

p 2

POWER

AMI

4|t}-----4}

BATT

12Vv

1-2.

EXTERNAL

VIEW

1501-129

X-38424-88-1

antenna,

telescopic

caver

ass’y,

dial

3842-437

button,

LIGHT

1-§14-729-44

1514-866

switch,

AFC

switch,

POWER

‘BFO

= x

}

X-38424-81

3842-464

GAIN

E =

knob

ass’y,

BAND

SELECTOR

knab,

control

TONE

VOLUME

Presa

fob,

nag

emblem,

“SONY”

af,

PaAn

X-38424-82

knob

ass’y,

FINE

TUNING

SECTION

CRF-5080

DISASSEMBLY

AND

REASSEMBLY

2-1.

FRONT

PANEL

REMOVAL

screw,

T3x

remove

front

cover,

pull

either

front

cover

sliding

shaft

toward

inside

and

slide

the

front

cover

out.

Unsojder

the

three

speaker

leads

(YEL

and Two

BRN)

terminal

strip.

screw,

@P3x6

aes

BAND

pull

off

the

knob

sorew,

DBI

screw,

OB3xB

screw,

3x6

Fig.

2-2.

CRF-508

2.3.

FRONT

END

REMOVAL

25,

DIAL

SCALE

REASSEMBLY

OPex8

Rotate

the

BAND

SELECTOR

knob

fully

clockwise.

Set the

dial

drum

adjusting

the

two

machine

screws

(A)

that

shows

band

and

that

the

tip

the

pointer

the

line

band

shown

Fig.

2-6.

2.4.

FRONT

END

REASSEMBLY

Rotate

the

dial

drum

fully

clockwise

and

the

double

gear

ass’y

fully

counterclockwise.

Set

the

front

end

with

three

screws.

See

Fig.

2-3.

above.

dial

drum

acai

BAND

SELECTOR

knob

Fig.

2-5.

27)

pointer

Fig.

2-6,

double

gear

ass‘y

fully

conter-

Fig.

2-4.

clockwise

position

2-6.

CRF-5080

CIRCUIT

BOARD

REMOVAL

Remove

the

chassis.

Unsolder

the

wires

and

capacitor

lead

shown

Fig.

2-7.

Remove

the

connector

from

the

band

selector

switch

shaft

wedging

with

slot

screwdriver

the

direction

shown

the

arrow

Fig.

2-8.

Remove

the

two

screws.

Remove

the

circuit

board

the

direction

shown

the

arrow

Fig.

2-7.

The

removed

circuit

board

shown

Fig.

2-9.

screw,

machine

Fig.

2-7,

3-842-488

connector

2-7.

DIAL

CORD

STRINGING

Dial

Drum

Driving

Cord

(36-5/8"}

CMI

dial

drum

fully

clockwise

Unsoider

turns

fcounter-

clockwise)

tuning

shaft

Fig.

2-10.

CRF-5080

Pointer

Driving

Cord

(32-3/4")

—

ONIN

fasten

with

eyelet

dial

drum:

fully

clockwise

position

Fig.

2-11.

set

the

pointer

the

leftmost

dot

the

dial

scale

Fig.

2-12,

icrr-5080

SECTION

CIRCUIT

ADJUSTMENTS

Modulation:

Test

Equipment/Tools

Required:

signal

generator

{for

and

a-m)

Loop

antenna

VTVM

resistor

0.01

ceramic

capacitor

Screwdriver

for

alignment

Preparation

VTVM

Connection:

EARPHONE

jack

with

load

resistor

parallel

3-1.

IF:

ALIGNMENT

Setup

shown

Fig.

3-1.

Set

the

POWER

switch

ON,

Set

the

BAND

SELECTOR

FM.

VOLUME

Controi

Setting:

TONE

Control

Setting:

400

Hz,

30-%

lated

signal

AFC

Switch:

OFF

BFO

Controi

Setting:

OFF

Gain

Control

Setting:

Connect

the

signal

generator

the

ext

ant

terminal

after

detaching

antenna

lug

shown

Fig,

3-2.

signal

generator

(SEX

mvt

ext

antenna

terminals

jack

Fig.

3-1,

i-f

alignment,

frequency

coverage

and

tracking

adjustment

setup

EARPHONE

Qresistor

NORMAL

detach

antenna

lug.

from

signal

generator

Fig.

3-2.

signal

generator

coupling

Signal

Signat

sah

enerator

Modulation

just

Remarks

Frequency

IFT

10.7

MHz

400

iz,

30%

a-m

modulation

gee

Fig.

3-6,|

Adjust

for

minimum

meter

reading(*1),

10.7

MHz

400

Hz,

+22.5

kHz

IFT

F101

Set

the

tuning

knob

the

best

signal

modulation

IFT

-F-2(*2)]

position.

IFT

Adjust

for

maximum

meter

reading,

See

Fig.

3-4

and

Fig.

346.

Note:*1.

Minimum

output

will

observed

both

extremes

the

discriminator.

The

real

null

point

will

obtained

the

middlc

the

core

thread

length

and

maximum

output

will

obtained

both

sides

the

true

null

point.

Slowly

and

carefuily

turn

the

core

obtain

minimum

output.

*2.

IFT F-2

unable

adjust

from

rear

part

the

set.

Remove

the

front

panel

and

adjust

IFT

F-2

from

front

part,

(See

Fig.

3-4).

400

Hz,

+22.5

kHz

frequency-medu-

amplitude-modulated

Mechanical

mid

position

Mechanical

mid

position

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