Sony CRF-5080 User manual

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PRESIDENT

PRESIDENT TEDDY R. owner's manual

Circuit

System:

Frequency

Coverage:

intermediate

Frequency:

Antenna

System:

Sensitivity

at

50

mW

output,

S/N

6

dB:

SPECIFICATIONS

13-transistor

8-diode

superheterodyne

G-transistors

and

1

diode

for

auxiliary

circuit

FM

=

87,5

~

108

MHz

(3.42

—

2.78

m)

LW

150

—

400

kHz

(2,000

—

750

m)

MW

530

—

1,605

kHz

(566

—

187

m)

4.6

—

3.5

MHz

(187

—

86

m)

3.5

—

9.0

MHz

(86

—

33

m)

9.0

—

14.0

MHz

(33

=

21

m)

14

—

21

MHz

{21

—

14m)

SWS

21

~

26

MH2

(14

—

14

m)

eM

10.7

MHz

LW/MW/SW-

485

kHz

FM

telescopic

antenna

or

external

antenna

(impedance

75

$2}

LW/MW._

built-in

ferrite

bar

antenna

or

external

antenna

(high

impedance)

sw

telescopic

antenna

or

external

antenna

{

high

impedance

}

FM

0.7

pV

(-3.48)

LW

63

BV/m

(36

dB/m)

MW

24

UV/m

(27

d8/m)

1.2

pV!

(18)

TMV

(0

dB)

1

BVO

dB)

1.2

UV

(1

GB}

4.3MV

(2

cB}

Selectivity

at

+

10

kHz

off-resonance:

Power

Output

at

10

%

distortion:

maximum:

Current

Drain

at

zero

signal:

maximum:

Power

Requirement:

‘Speaker:

Dimensions:

Weight:

35

dB

at

1,400

kHz

1.8W

2.7W

FM

40

mA,

MW

35

mA

320

mA

DC

eight

“’D”"

size

flashlight

batteries

12

volts

or

car

battery

by

using

SONY

car

battery

cord

DCC-2AW

AC

house

current

100

V,

120

V,

220

V

or

240

VAC;

50 Hz

or

60

Hz

10

cm

x

15

cm

(4"

x

6},

8

2

340

mm

(W)

x

230

mm

{H)

x

160

mm

(D)

13

36"

x9

3G"

x6

9G"

J

6.6

kg

{14

Ib

9

oz)

overall

with

batteries

SON

Ye

SERVICE

MANUAL

CRF-50

TABLE

OF

CONTENTS

'

Section

Title

Page

Section

Title

Page

Specifications...

.......5

1

1.

OUTLINE

3-2,

AMIfAlignment.........

9

33,

Bfo

Osc

Coil

Adjustment...

..

9

Fel.

Block

Diagram...

22.00.

3

ose

Coll

Adiurment

a2)

:

3-4.

Frequency

Coverage

and

Tracking

12.

External

View...

2.000005

3

:

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

10

2.

DISASSEMBLY

AND

REASSEMBLY

4.

DIAGRAMS

2-1.

Front

Panel

Removal.

.

22.

ChassisRemoval.....

0...

-

4

aa

Eprucavaivan

bees

i

2-3.

FMFrontEnd

Removal...

...

5

a

ala

Re

2-4,

FMFront

End

Reassembly.

3

25.

Dial

Scale

Reassembly

.

5.

EXPLODED

VIEW

AND

PACKING

2-6,

Circuit

Board

Removal

6

5-1.

Exploded

View

(1).

2

2...

7

2-7,

Dial

Cord

Stringing.

6

5-2,

Exploded

View

(2)...

0.0...

-

19

$3.

Packing...

2...

ee

eee

2

3.

CIRCUIT

ADJUSTMENTS

al.

FMUf

Alignment

.........

8

6.

ELECTRICAL

PARTS

LIST.......

.

22

Hardware

Nomenclature

P

—

Pan

Head

Screw

.........

-@®

(E5_

|

E

—

Retaining

Ring

(E

Washer)

or)

—

Flat

Countersunk

Head

Screw

6)

f=

W

~

Washer

B

—

Binding

Head

Screw

.........

@)

Ky

=

Biainiple

=

SW

—

Spring

Washer

RK

—

Oval

Countersunk

Head

Screw

.(9)

(3

fipseaisist

LY

Pane

RE

T

=

Truss

Head

Screw

0.2...

@)

|

eraxt0

Bre

Re

R

-

Round

Head

Screw

........-

@)

qe

Length

in

mm

(L)

ae

”

F

Flat

Pillister

Head

S:

=

ta

I

i

fi

-

hat

Feilhi:

lead

Screw

i

it

aeieitec

Diameter

in

mm

(D)

l_--l

1.

SC

=

Set

Screw

.......

0.0.

cece

en

Type

of

Head

~

oO

When

ordering

replacement

parts,

you

should

use

PART

NUMBER

listed

on

the

Parts

List

or

shown

in

the

EXPLODED

VIEW.

The

reference

number

should

not

be

used

for

ordering

purposes.

|

eRE-5080

SECTION

1

OUTLINE

1-1.

BLOCK

DIAGRAM

AFC.

207

FA

IF

AMP.

LOAAWIS

MIX

9202

FM

METER

RE

GAIN

CONTROL

0210

METER

AMP

ue

TUNING

METER

+or

+82

POWER

AMP

x

aQ

1-2,

EXTERNAL

VIEW

=

1-501-129

X:38424-88-1

: R

antenna,

telescopic

caver

ass’y,

dial

}

ae

=

3842-437

button,

LIGHT

1-§14-729-41

1-514-866

switch,

AFC

switch,

POWER

BFO

ae

ni

X-38424.81

3-842-464

RF

GAIN

ad

ees

a

knob

ass’y,

BAND

SELECTOR

knob,

controt

‘|

TONE

VOLUME

3

3842-466

3-842-440

B

ea

knob,

tuning

emblem,

“SONY”

X-38424-82

knob

ass’y,

FINE

TUNING

CRF-5080

SECTION

2

DISASSEMBLY

AND

REASSEMBLY

2-1,

FRONT PANEL

REMOVAL

To

remove

tront

cover,

pull

either

front

cover

ff

stiding

shaft

toward

inside

and

slide

the

front

cover

out.

Unsolder

the

three

speaker

leads

(YEL

and

Two

BRN)

at

terminal

strip.

screw,

BB2x4

o

&

screw,

®B

2x8

CRF-508¢

SECTION

1

OUTLINE

1-1.

BLOCK

DIAGRAM

TEL

Eas

ANT

u/s

20%

PME

IF

AMP.

LWASWISW

MIX

+at

0208,

0209

RECTIFIER

CAR

BATT,

+

0212,

0213

p 2

BC

RV

62

POWER

AMI

x,

4|t}-----4}

4

BATT

BC

12Vv

1-2.

EXTERNAL

VIEW

E

j

1501-129

X-38424-88-1

=

g

antenna,

telescopic

caver

ass’y,

dial

:

3842-437

button,

LIGHT

1-§14-729-44

1514-866

switch,

AFC

switch,

POWER

=~

‘BFO

i

= x

}

X-38424-81

3842-464

RF

GAIN

E =

t

knob

ass’y,

BAND

SELECTOR

knab,

control

|

TONE

VOLUME

Presa

fob,

nag

emblem,

“SONY”

af,

=

PaAn

e

X-38424-82

knob

ass’y,

FINE

TUNING

SECTION

2

CRF-5080

DISASSEMBLY

AND

REASSEMBLY

2-1.

FRONT

PANEL

REMOVAL

screw,

@

T3x

ae

To

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)

at

terminal

strip.

RD

screw,

@P3x6

~

Mn

aes

BAND

cr

pull

off

the

knob

sorew,

DBI

x4

@

re

screw,

OB3xB

screw,

@

3x6

ee

Fig.

2-2.

CRF-508

2.3.

FM

FRONT

END

REMOVAL

25,

DIAL

SCALE

REASSEMBLY

q

OPex8

1.

Rotate

the

BAND

SELECTOR

knob

fully

clockwise.

2,

Set the

dial

drum

adjusting

the

two

machine

screws

(A)

so

that

it

shows

FM

band

and

that

the

tip

of

the

pointer

is

on

the

line

of

FM

band

as

shown

in

Fig.

2-6.

2.4.

FM

FRONT

END

REASSEMBLY

be

Rotate

the

dial

drum

fully

clockwise

and

the

double

gear

ass’y

fully

counterclockwise.

2,

Set

the

fm

front

end

with

three

screws.

See

Fig.

2-3.

above.

dial

drum

,

pi

acai

BAND

SELECTOR

knob

Fig.

2-5.

x

27)

pointer

Fig.

2-6,

double

gear

ass‘y

.

at

fully

conter-

Fig.

2-4.

clockwise

position

2-6.

ow

CRF-5080

CIRCUIT

BOARD

REMOVAL

Remove

the

chassis.

Unsolder

the

13

wires

and

capacitor

lead

shown

in

Fig.

2-7.

Remove

the

connector

A

from

the

band

selector

switch

shaft

by

wedging

with

a

slot

screwdriver

in

the

direction

shown

by

the

arrow

in

Fig.

2-8.

Remove

the

two

screws.

Remove

the

circuit

board

in

the

direction

shown

by

the

arrow

in

Fig.

2-7.

The

removed

circuit

board

is

shown

in

Fig.

2-9.

(@

screw,

machine

Fig.

2-7,

3-842-488

connector

A

2-7.

DIAL

CORD

STRINGING

Dial

Drum

Driving

Cord

:

93

om

(36-5/8"}

CMI

ss

1

dial

drum

:

at

fully

clockwise

Unsoider

==

3%

turns

fcounter-

clockwise)

tuning

shaft

Fig.

2-10.

CRF-5080

Pointer

Driving

Cord

ig

83

em

(32-3/4")

—

7]

ONIN

tf

==

fasten

with

eyelet

dial

drum:

at

fully

clockwise

position

oe

Fig.

2-11.

set

the

pointer

at

the

leftmost

dot

of

the

dial

scale

Fig.

2-12,

icrr-5080

|

SECTION

3

CIRCUIT

ADJUSTMENTS

Modulation:

Test

Equipment/Tools

Required:

Rf

signal

generator

{for

fm

and

a-m)

Loop

antenna

VTVM

8

Q

resistor

0.01

WF

ceramic

capacitor

Screwdriver

for

alignment

Preparation

VTVM

Connection:

To

EARPHONE

jack

with

8

Q

load

resistor

in

parallel

3-1.

FM

IF:

ALIGNMENT

Setup

is

shown

in

Fig.

3-1.

Set

the

POWER

switch

to

ON,

Set

the

BAND

SELECTOR

to

FM.

VOLUME

Controi

Setting:

TONE

Control

Setting:

FM

AM

400

Hz,

30-%

lated

signal

signal

AFC

Switch:

OFF

BFO

Controi

Setting:

OFF

RF

Gain

Control

Setting:

Connect

the

rf

signal

generator

to

the

FM

ext

ant

terminal

after

detaching

antenna

lug

as

shown

in

Fig,

3-2.

rf

signal

generator

(SEX

mvt

st

©

:

pt

FM

ext

antenna

terminals

jack

Fig.

3-1,

FM

i-f

alignment,

frequency

coverage

and

tracking

adjustment

setup

EARPHONE

8

Qresistor

NORMAL

detach

antenna

lug.

from

rf

signal

generator

Fig.

3-2.

Rf

signal

generator

coupling

a

Signal

RE

Signat

sah

enerator

Modulation

just

Remarks

Frequency

IFT

F4

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

fm

IFT

F101

Set

the

tuning

knob

at

the

best

signal

modulation

IFT

-F-2(*2)]

position.

IFT

F3

Adjust

for

maximum

meter

reading,

See

Fig.

3-4

and

Fig.

346.

Note:*1.

Minimum

output

will

be

observed

at

both

extremes

of

the

discriminator.

The

real

null

point

will

be

obtained

in

the

middlc

of

the

core

thread

length

and

maximum

output

will

be

obtained

at

both

sides

of

the

true

null

point.

Slowly

and

carefuily

turn

the

core

to

obtain

minimum

output.

*2.

IFT F-2

is

unable

to

adjust

from

rear

part

of

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