Sony STR-232L Manuale utente

GENERAL

Power

Requirements:

Power

Consumption:

Dimensions:

Weight:

SECTION

Tuning

Range:

Antenna:

Intermediate

Frequency:

Sensitivity

50d8

Quieting:

SPECIFICATIONS

240

ac,

(UK

model)

120

220

240

adjustable,

(AEP

model)

110

(UK

model)

(AEP

model)

Approx.

410

(w)

145

(h)

305

(d)

(w)

(h)

(d)

inches

including

projecting

parts

and

controls.

5.9

kg,

(net)

Approx.

7.1

kg,

{in

shipping

carton)

87.5

—

108

MHz

300

balanced

unbalanced

10.7

MHz

(12

dB)

(MONO)

(33

dB)

(STEREO)

Sensitivity

46dB

Quieting:

(at

40kHz

deviation)

Usable

Sensitivity:

S/N

Ratio:

Harmonic

Distortion:

Separation:

Frequency

Response:

AEP

Model

STEREO/FM-AM.

RECEIVER

4.5

(13

dB)

(MONO)

(34

dB)

(STEREO)

1.9

(5.5

dB),

tHE

1.7

(4.5

dB),

S/N

(40

kHz

deviation)

(MONO)

(STEREO)

kHz

0.3

(MONO)

0.5

(STEREO)

0.3

(MONO)

0.5

(STEREO)

kHz

—

12,500

*°:

+0.

—

15,000

“>

—

Continued

page

—

SAFETY-RELATED

COMPONENT

WARNING!!

COMPONENTS

IDENTIFIED

SHADING

AND

MARK

THE

SCHEMATIC

DIAGRAMS,

EXPLODED

VIEWS

AND

THE

PARTS

LIST

ARE

CRITICAL

SAFE

OPERATION.

REPLACE

THESE

COMPONENTS

WITH

SONY

PARTS

WHOSE

PART

NUMBERS

APPEAR

SHOWN

THIS

MANUAL

SUPPLEMENTS

PUBLISHED

SONY.

SERVICE

MANUAL

STR-232L

Selectivity:

Capture

Ratio:

Suppression

Ratio:

Image

Response

Ratio:

Spurious

Response

Ratio:

Muting

Threshold:

MW/LW_

SECTION

Tuning

Range:

Antenna:

Intermediate

Frequency:

Usable

Sensitivity:

S/N

Ratio:

Harmonic

Distortion:

Selectivity:

(300

kHz,

S/N

dB,

kHz

deviation)

1.0

Approx.

MW:

.530

—

1,605

kHz

LW:

150

350

kHz

MW:

External

antenna

terminal

Built-in

ferrite-rod

antenna

LW:

External

antenna

terminal:

Built-in

ferrite-rod

antenna

468

kHz

MW:

250

uV/m

(40

dB/m),

built-in

antenna

(1,000

kHz)

LW: 500

uV/m

(53.8

dB/m),

built-in

antenna

(230

kHz)

100

(40

dB),

external

antenna

(230 kHz)

MW:

LW:

52dBat5mvV

MW:

0.3

mV,

400

LW:

0.3

mV,

400

kHz)

AUDIO

AMPLIFIER

SECTION

Continuous

RMS

Power

Output:

Less

than

0.7

THD,

both

channels

driven

simultaneously

—

20,000

kHz

According

DIN

45500

@®

MODEL

IDENTIFICATION

—

Voitage

Selector

—

Only

AEP

models,

the

voltage

selectors

are

installed.

Po,

IHF

constant

power

supply

method

Wat

—

40,000

Hz,

IHF

kHz

Less

than

0,7

rated

output

Less

than

0.3

output

Less

than

0.7

rated

output

Less

than

0.3

output

Less

than

0.08

PHONO:

RIAA

equalization

curve

1.0

TAPE:

—

50,000

Dynamic

Power

Output:

Power

Bandwidth:

Damping

Factor:

Harmonic

Distortion:

(60Hz

7kHz=4:

Residual

Noise:

Frequency

Response:

+1dB

—3

Inputs:

Impedance

S/N

Weighting

network

50k2

|70dB

100k2

|90dB

Measured

with

rated

output

power

into

loads

{both

channels

driven

simultaneously)

kHz.

Sensitivity

PHONO

2.5

(—50

dB)

TAPE

150

(—14.5

dB)

Outputs:

(with

rated

input)

Voltage

Impedance

REC

OUT

150mV(-14.54B)

10k2

Headphones:

Accepts

all

low

high

impedance

headphones.

Speaker:

—

speakers

are

suitable.

BASS:

100

TREBLE:

kHz

100

kHz

Tone

Controls:

Loudness

Control:

(att.

30dB)

0dB=0.775

SECTION

OUTLINE

1-1.

BLOCK

DIAGRAM

T™901

FRONT-END

BLOCK

ANTENNA

see

PRE

AMP)

AMIE

AMP/

AMP

MIX

OSC/AM

MIX

(iH)

OSC

chia

[uw]—-

L———~——————-—

me901

[SIGNAL

MW/LW

FERRITE-ROD

ANT

™

1201

SII

;

L204

ose

L209

gee]

EXT

Ekisal

L206

|LW

ANTENNA

Osc

$1-5

BUILT

L_LW

€

L205

$2-2

FUNCTION

5902

AMP

[PHONO]

9501,502

VOLUME

(7)

3904

PHONO

POWER

AMP

REC

wT]

TUNER

(8)

Tere

Bore

$2-3

1903

MONO

S4-1

;

LOUDNESS

STEREO

R~CH

cai

TREBLE

[MoDE}

B+

POWER

AMP

B+

AMP

D701,708

B+

TUNER

(4)

STR-232L

MPX

(2)

301

(1)

R~CH

L-CH

twg02

SPEAKER

R-CH

3901

HEADPHONES

STR-232L

SECTION

DISASSEMBLY

the

disassembly

procedure

the

numerical

order

given.

REPLACEMENT

CASE

REMOVAL

DIAL

CORD

STRINGING

® See

page

TA,

x 8

FRONT

GLASS

REMOVAL

rear

panel

glass

support

side

chassis

(L)

front

glass

support

heat

sink

BOTTOM

PLATE

REMOVAL

FRONT

PANEL

REMOVAL

bracket

C651

insulator

front

panel

BVTT3x6

main

circuit

board

Retainer

Ww?

bottom

plate

insulator

Unsolder

the

pins

1C601,

651.

bracket

Pull

out

all

knobs.

—5-

~6—

STR-232L

oO)

DIAL

CORD

STRINGING

Preparation

ioe)

jo)

dial

cord,

0.6mm

dia.

661mm

(26

inches}

Stringing

Turn

the

dial

drum

fully

clockwise.

three

turns”

ise)

Gial

drum

Dial

Pointer

Installation

Tune

the

receiver

the

off-the-air

signal.

Set

the

dial

pointer

the

frequency

the

dial

scale

and

install

it.

[

STR-232L

3-1.

SECTION

Setting:

FUNCTION

Selector:

Band

Selector:

MODE

Selector:

signal

generator

Modulation:

400

Hz,

SECTION

ADJUSTMENTS

TUNER

STEREO/FM-AM

MUTE

Put

the

lead-wire

antenna

the

set.

———

VOM

(range:

0.5—5V

ac]

REC

OUT

Repeat

the

procedures

each

adjustment

several

times,

and

the

frequency

coverage

and

tracking

adjustments

should

finally

done

the

trimmer

capacitors.

TRACKING

ADJUSTMENT

Adjust

for

maximum

reading

VOM.

L201

CT203

600

kHz

1400

kHz

FREQUENCY

COVERAGE

ADJUSTMENT

Adjust

for

maximum

reading

VOM.

CT201

1680

kHz

L204

520

kHz

ALIGNMENT

Adjust

for

maximum

reading

VOM.

CFT201

STR-232L

3-2.

SECTION

Setting:

FUNCTION

Selector:

TUNER

Band

Selector:

MODE

Selector:

STEREO/FM-AM

MUTE

ANTENNA

Selector:

BUILT

signal

VOM

generator

frange:

0.5—5V

ac}

Put

the

lead-wire

antenna

the

set.

set

7.)

Modulation:

400

Hz,

REC

OUT

Repeat

the

procedures

each

adjustment

several

times,

and

the

frequency

coverage

and

tracking

adjustments

should

finally

done

the

trimmer

capacitors.

EXT

ANTENNA

COIL

ADJUSTMENT

signal

dummy

antenna

generator

Carrier

frequency:

230

kHz

30%

amplitude

modulation

ANTENNA

terminal

400

signal

Set

the

ANTENNA

switch

EXT

position.

Tune

the

set

230

kHz

and

adjust

L205

for

maximum

reading

VOM.

£205

“s.

L209

CT204

170

kHz

310

kHz

FREQUENCY

COVERAGE

ADJUSTMENT

Adjust

for

maximum

reading

VOM.

CT202

L206

365

kHz

145

kHz

STR-232L

3-3.

SECTION

Setting:

FUNCTION

Selector:

TUNER

Band

Selector:

MODE

Selector:

STEREO/FM-AM

MUTE

VOM

frange:

0.5—5V

ac}

signal

generator

ANTENNA

‘terminal

7§Q.

—_——

REC

OUT

Repeat

the

procedures

each

adjustment

several

times,

and

the

frequency

coverage

and

tracking

adjustments

should

finally

done

the

trimmer

capacitors.

Modulation:

400

Hz,

kHz

deviation

(100

FREQUENCYC

COVERAGE

ADJUSTMENT

Adjust

for

maximum

reading

VOM.

87.1

MHz

(87.5

MHz)

108.5

MHz

(108

MHz)

(

West

Germany

TRACKING

ADJUSTMENT

Adjust

for

maximum

reading

VOM.

87.1

MHz

(87.5

MHz)

108.5

MHz

(108

MHz)

(

West

Germany

abr

STR-232L

DISCRIMINATOR

ALIGNMENT

Setting:

FUNCTION

Selector:

TUNER

Band

Selector:

DISCRIMINATOR

ALIGNMENT

MODE

Selector:

MONO

TUNING:

Detuned

position

VOM

Setting:

FUNCTION

Selector:

TUNER

(range:

2.5V

de)

Band

Selector:

MODE

Selector:

MONO

Procedure:

stereo

T.P

‘

signal

;

dswiniog

Adjust

the

blue

core

(primary-side)

IFT201

for

generator

meter

reading

VOM.

Note:

When

replacing

the

ceramic

filter

(CF201),

perform

this

alignment.

1FT201

(primary

side;

blue)

ANTENNA

REC

OUT

Carrier

frequericy:

MHz

ALIGNMENT

Setting:

FUNCTION

Selector:

TUNER

Output

level:

(60

dB}

Modulation:

400

Hz,

kHz

deviation

Band

Selector:

(100

signal

MODE

Selector:

MONO

Procedure:

generator

VOM

Adjust

the

black

core

(secondary

side)

IFT201

for

minimum

distortion.

STEREO

SEPARATION

ADJUSTMENT

Setting:

FUNCTION

Selector:

TUNER

Band

Selector:

1FT201

dary

side:

black)

MODE

Selector:

STEREO/FM-AM

MUTE

fracondary:

ANTENNA

REC

OUT

Brooeaane:

stereo

signal

. .

VOM.

Generator

VTVM

Carries

Freqency:°

Milz

Adjust

IFT1

for

maximum

reading

the

VOM

Output

level:

12.5

(22

dB)

0.01

Modulation:

400

Hz,

kHz

deviation

(100

ANTENNA

REC

OUT

762.

19kHz

ADJUSTMENT

Carrier

frequency:

MHz

Output

level:

(60

dB)

Simple

Method

Setting:

FUNCTION

Selector:

TUNER

Modulation:

Procedure:

(400

kHz

deviation

(50

Band

Selector:

thevaat

EMC

dare

proudeasting

Sasial

Pilot

(19

kHz):

6.3

kHz

deviation

(16

;

set

tne

stereo

Sub

channel

(38

kHz):

kHz

deviation

(50

Seeetok

STEREO

(EMD

NITE

Turn

RT302

clockwise

counterclockwise

and

Procedure:

Regular

Method

memorize

the

lighting-up

range

STEREO

lamp.

stereo

VTVM VTVM

ich

alee

Secure

RT302

the

center

lighting-up

range

signal

generator

output

channel

LCH

connection

reading

generator

both

turns

shown

below.

Adjust

RT301

RCH

LCH

resistor

for

minimum

reading.

center

lighting-up

ranges

Carrier

frequency:

MHz

ANTENNA

lighting-up

range

Output

level:

7mV

752

Modulation:

modulation

R318

R317

c314()

frequency

counter

Adjust

RT301

R-CH

resistor

for

minimum

reading.

L-CH

Stereo

separation:

R-CH

Stereo

separation:

®)

The

difference

between

separations

@)->®)

and

©-D

are

equal.

Procedure:

Adjust

RT302

for

kHz

+100

the

frequency

counter.

atte

Replacement

Semiconductors

For

replacement,

use

semiconductors

except

(

1201:

CX168

24 22

20.18

9}17

[15/13

(ZF4O678

910112

(Top

view)

1C301:

CX178

715

{16

[14412]

123456789

{Top

view)

IC601,651:

HA1350S

12345676910

(Marking

side

view)

0301,

702,

703

2SC1364

Q501,

502

(2SC1815)

0551,

552!°

28¢1362

Fc.

Q701:

2SD809

letter

side

Cy,

Q704:

2SA1027R

(2SA844)

Q705:

2SC1475

(2SD789)

D201,

301,

302,

308,

309

D704,

706, 707,

709,

710

D703

181555

10E2

cathode

GLOPR21

(GLOPR)

anode

cathode

D303

D304,

305,306

GL2PR1

(GL2PR)

short

Jong

cathode

anode

D307:

EQB01-11Z

(EQA01-11R)

D702:

EQB01-16

(EQA01-16R)

D705:

£QB01-26

(EQA01-26R)

cathode

aE)

D701:

S3VC40R

(S2VC20R)

brown

D708:

S3VC40

(S2VC20)

black

opt

Lee

-~13-

STR-232L

Tesco

itl

gn)

S32

“oe

ARs

aafeebihe

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