Sony Ta-av431 User manual

TA-AV431/AV931

SERVICE

MANUAL

US

Model

Mexican

Model

TA-AV431

US

Model

TA-AV531

This

set

is

the

amplifier

section

in

SEN-431CD/531CD

This

photo

is

TA-AV531

SPECIFICATIONS

Output

(TA-AV531)

TAPE

Phono

jacks

Voltage

150

mV

(REC

OUT)

Impedance

1

kilohm

SPEAKERS

Accepts

speakers

of

8

—

16

ohms

(Front,

Rear)

SPEAKERS

Accepts

speakers

of

4

—

16

ohms

(Center)

HEADPHONES

|

Stereo

phone

jack

|

Accepts

low

and

high

impedance

headphones.

Output

(TA-AV431)

SPEAKER:

Accepts

speakers

of

8

to

16

ohmes

AUDIO

POWER

SPECIFICATIONS

POWER

OUTPUT

AND

TOTAL

HARMONIC

DISTORTION:

With

8-ohm

loads,

both

channels

driven,

from

40

—

20,000

Hz;

rated

135

(TA-AV531),

110

(TA-AV431)

watts

per

channel

minimum

RMS

power,

with

less

than

0.9%

total

harmonic

distortion

from

250

milliwatts

to

rated

output.

Power

bandwidth

(IHF)

30

Hz

—

30

kHz

(8

ohms)

(TA-AV531)

Dynamic

headroom

1.7

dB

(78

IHF)

(TA-AV531)

Harmonic

distortion

Less

than

0.9%

at

rated

output

(Surround

OFF)

(TA-AV531)

Frequency

response

PHONO:

RIAA

equalization

curve

CD,

VIDEO,

TUNER,

TAPE:

10

Hz

—

50

kHz

+

3

dB

(TA-AV531)

PHONO:

RIAA

curve

CD,

VIDEO:

10

Hz

—

50

kHz

+

3

dB

(TA-AV431)

15

W

+

15

W

(at

front

off

8

ohmes)

(TA-AV531)

10

W

+

10

W

(at

front

off

8

ohmes)(TA-AV431)

30

W

(at

front

off

4

ohmes)

(TA-AV531)

27

(8

ohms,

1

kHz)

(TA-AV531)

Rear

output

Center

output

Damping

factor

Input

(TA-AV531)

Input

jack

|

Jack

type

|

Sensitivity

|

Impedance

|

S/N

(weighting

network,

input

level)

Phono

3.0

mV

50

kilohms

|

71

dB

:

75

dB*

(A,

3.0

mV)

Phono

250

mV

50

kilohms

|

92

dB

83

dB*

(A,

250

mV)

(TA-AV431)

es

ee

PHONO

2.5

mV

50

kilohms

50

kilohms

*'78

IHF

CD,

VIDEO

HEADPHONES:

Accepts

headphones

with

low

and

high

impedance

GRAPHIC

EQUALIZER

controls

Boost/Cut

range:

+

8

dB

(100

Hz,

330

Hz,

1

kHz,

3.3

kHz)

+

6

dB

(10

kHz)

Approx,

430

x

145

x

360

mm

(w/h/d)

(17

x5

%

x

14%

inches)

(including

projecting

parts

and

controls)

Weight

Approx.

9.9

kg

(21

lb

14

0z):

TA-AV531

Approx.

9.5

kg

(20

Ib

15

oz):

TA-AV431

Dimensions

General

Power

requirements

120

V

AC,

60

Hz

Power

consumption

250

W

(TA-AV531)

220

W

(TA-AV431)

AC

outlets

2

switched,

120

W/1

A

max.

(TA-AV531)

—

Continued

on

—

INTEGRATED

STEREO

AMPLIFIER

SONY.

Accessories

supplied

AM

loop

antenna

(1)

FM

wire

antenna

(1)

SYSTEM

CONTROL

cord

(1)

(TA-AV531)

Remote

Commander

RM-U521

(1)

(TA-AV531}

RM-U421

(1)

(TA-AV431)

Sony

batteries

SUM-3

(NS)

(2)

Audio

signal

connecting

cord

(phono

plug

x

2

<>

phono

plug

X

2)

(1)

SYSTEM

CONTROL

1

cord

(1)

SYSTEM

CONTROL

2

cord

(1)

SYSTEM

CONTROL

3

cord

(1}

(The

SYSTEM

CONTROL

1

and

3

is

equipped

on

the

TC-W431.)

(TA-AV431)

Design

and

specifications

are

subject

to

change

without

notice.

TABLE

OF

CONTENTS

Section

Title

Page

SECTION

1.

GENERAL

...........ccccccccsssccsecsssssrnsencnmersesseses

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as

4

SECTION

2.

IC

FUNCTIONS

uu...

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5

SECTION

3.

DIAGRAMS

3-1.

Circuit

Boards

Location

........ccccccccssccscsscssesevsssecevescsasevaeseseevarecers

9

3-2.

Semiconductor

Lead

Layouts

...........c:ccccsesesesesssssssesssscssssssssseevens

9

3-3,

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Diagram

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10

3-4.

Printed

Wiring

Board

*

MAIN

Section

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13

|

3-5.

Schematic

Diagram

@

MAIN

SéCHiON

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17

3-6.

Schematic

Diagram

*

DISPLAY

Section...

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ccs

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21

3-7,

IC

BIOCK

Diagrams

..........ccccecsccssscsesseeescsseserssscssvensacecsscsussenssscaess

23

SECTION

4.

EXPLODED

VIEWS

4-1.

Front

Panel

Section

0.0...

ccccccsssssssesseecssessevssssssssecscsevesseseenessaes

25

4-22.

TBOard:

Section

cdivviesssidcesdacasrassvdsnvestegraacsscatian

svat

sariacusisoeceteiupaseess

26

SECTION

5.

ELECTRICAL

PARTS

LIST

........0..

27

SAFETY

CHECK-OUT

After

correcting

the

original

service

problem,

perform

the

following

safety

checks

before

releasing

the

set

to

the

customer:

Check

the

antenna

terminals,

metal

trim,

‘‘metallized”’

knobs,

screws,

and

all

other

exposed

metal

parts

for

AC

leakage.

Check

leakage

as

described

below.

LEAKAGE

TEST

The

AC

leakage

from

any

exposed

metal

part

to

earth

ground

and

from

all

exposed

metal

parts

to

any

exposed

metal

part

having

a

return

to

chassis,

must

not

exceed

0.5mA

(500

microampers).

Leakage

current

can

be

measured

by

any

one

of

three

methods.

1.

A

commercial

leakage

tester,

such

as

the

Simpson

229

or

RCA

WT-540A.

Follow

the

manufacturers’

instructions

to

use

these

instru-

ments.

2.

A

battery-operated

AC

milliammeter.

The

Data

-

Precision

245

digital

multimeter

is

suitable

for

this

job.

3.

Measuring

the

voltage

drop

across

a

resistor

by

means

of

a

VOM

or

battery-operated

AC

volt-

meter.

The

“limit”

indication

is

0.75

V,

so

analog

meters

must

have

an

accurate

low-

voltage

scale.

The

Simpson

250

and

Sanwa

SH-63Trd

are

examples

of

a

passive

VOM

that

is

suitable.

Nearly

all

battery

operated

digital

multimeters

that

have

a

2V

AC

range

are

suitable.

(See

Fig.

A)

To

Exposed

Metal

Parts

on

Set

AC.

vo/tmeter

P|

(0.78)

=

Earth

Ground

Fig.

A.

Using

an

AC

voltmeter

to

check

AC

leakage.

SAFETY-RELATED

COMPONENT

WARNING!!

COMPONENTS

IDENTIFIED

BY

MARK

A

OR

DOTTED

LINE

WITH

MARK

A

ON

THE

SCHEMATIC

DIAGRAMS

AND

IN

THE

PARTS

LIST

ARE

CRITICAL

TO

SAFE

OPERATION.

REPLACE

THESE

COMPONENTS

WITH

SONY

PARTS

WHOSE

PART

NUMBERS

APPEAR

AS

SHOWN

IN

THIS

MANUAL

OR

IN

SUPPLEMENTS

PUB-

LISHED

BY

SONY.

SECTION

1

GENERAL

(TA-AV431)

Remote

Commander

This

section

is

extracted

from

instruction

manual.

The

remote

commander

supplied

with

this

unit

can

control

the

unit

from

a

distance.

The

remote

commander

is

divided

into

6

sections

according

to

the

functions

as

shown

below.

———

9

lees

Deo

Power

control

block

VTR

3*/TV/AUDIO

POWER

buttons:

Control

the

power

of

each

unit.

TV/VTR

control

block

VTR

3”

operation

buttons:

>:

Play

m:

Stop

AN7T

(antenna)

TV/VTR

button:

Selects

the

output

signal

from

the

antenna

terminal

on

the

VCR,

either

a

TV

signal

or

VCR

programs.

TV

VOL

(volume)

+/~

buttons:

Control

the

volume

of

TV.

TV

CH

(channel)

+/~

buttons:

Select

the

channel

of

the

TVs

(2

CD

control

block

SHUFFLE

button:

Set

to

the

shuffle

play

mode.

pm:

Play

in

the

TUNER

mode:

When

you

press

CD

»

once,

the

unit

enters

the

CD

mode.

When

you

press

CD

&

twice,

the

CD

player

starts

playback.

In

the

mode

other

than

the

TUNER

mode:

When

you

press

CD

®

once,

the

unit

enters

the

CD

mode

and

starts

playback.

m:

Stop

t</me1

(AMS:

Automatic

Music

Search):

Locates

a

desired

selection.

D

(disc)

SKIP

button:

Disc

skip

CONTINUE

button:

Set

to

the

continuous

play

mode.

SURROUND

control

block

SURROUND

mode

selectors

(for

the

amplifier)

ON/OFF:

Turns

on/off

the

surround

mode.

MODE:

Selects

the

surround

mode.

REAR

VOL

+/—

buttons:

Control

the

volume

of

rear

speakers

(surround

level).

Tuner

control

block

TUNER

PRESET

+/-

buttons:

Select

a

preset

station

of

the

tuner.

[6]

Amplifier

control

block

FUNCTION

selectors:

Select

an

input

source

of

the

amplifier.

(for

the

amplifier)

DBFB

button:

Turns

on/off

the

DBFB

(Dynamic

Bass

Feed

Back).

(for

the

amplifier)

MASTER

VOL

+/~

buttons:

Control

the

amplifier

volume.

*

You

can

control

Sony's

VHS

video

decks

with

the

VIR

3

POWER

and

VTR

3

operation

buttons.

Battery

life

About

half

a

year

of

normal

operation

can

be

expected

when

using

the

Sony

SUM-3

(NS)

batteries.

When

the

batteries

are

exhausted,

the

remote

commander

can

no

longer

operate

the

unit.

If

this

happens,

replace

both

batteries

with

new

ones.

To

avoid

battery

leakage

When

the

commander

is

not

to

be

used

for

a

long

time,

remove

the

batteries

to

avoid

damage

caused

by

battery

leakage

and

corrosion.

inserting

the

batteries

into

the

remote

commander

1

Open

the

cover.

2

Insert

two

size-AA

(R6)

batteries

with

correct

polarity

(TA-AV531)

Remote

Commander

The

remote

commander

supplied

with

this

unit

can

control

the

unit

from

a

distance.

The

remote

commander

Is

divided

into

6

sections

according

to

the

functions

as

shown

below.

Power

contro!

block

SYSTEM

OFF

button:

Turns

off

the

power

of

the

whole

system:

LDP,

VTR,

TV,

and

AUDIO.

LDP/VVTRIVTR2NVTR3/TV/AUDIO

POWER

buttons:

Control

the

power

of

each

unit.

[2}|

MODE

selector

Selects

the

function

mode

on

the

remote

commander.

1:

To

select

the

functions

indicated

in

light

gray

such

as

DECK,

DAT,

CD

player

and

the

SURROUND

mode

of

amplifier.

2:

To

select

the

functions

indicated

in

blue

such

as

VTR,

LDP

(Laser

disc

player)

and

TV.

CDP/LDP

control

block

The

combined

CD/LD

player

can

be

controlled

with

LDP

position.

em:

Play

tl:

Pause

@:

Stop

D

(disc)

SKIP:

Disc

skip

(for

a

CD

player

equipped

with

a

multi-disc

changer)

<¢</>

>:

Manual

search

(only

jor

LD

player)

\<4</mp-|;

Locates

a

desired

selection.

[4]

Tape

deck/VCR

control

block

DECK/VTR

selector

DECK

A,B,

and

DAT:

Selects

Deck

A,

B

or

DAT

deck.

VTR

1,

2,

and

3:

Set

to

the

VTR

1,

2

or

3

according

to

your

VCR

setting.

1:

Betamax

VCRs

2:8mm

VCRs

3:

VHS

VCRs

I;

Pause

m:

Stop

<</>

>:

Fast

winding

</>:

Play

4

@

(REC):

Recording

ANT

(antenna)

TV/VTR

button:

Selects

the

output

signal

from

the

antenna

terminal

on

the

VCR,

either

a

TV

signal

or

VCR

programs.

VTR

CH

(channel)

+/—

buttons:

Select

channel

on

the

VCR.

Tuner/TV

block

SHIFT

and

TUNER

PRESET/

TV

CH

(channel)

+/-

buttons:

Select

a

preset

station

of

the

tuner

or

a

channel

of

the

TV.

[6]

Amplifier/TV

block

TV/VIDEO

button:

Selects

the

input

signal

of

the

TV.

(for

TV)

Program

number

(1

to

0)

and

ENTER

buttons:

Select

the

channel.

(for

TV)

SURROUND

mode

selectors

(for

the

amplifier)

ON/OFF:

Turns

on/off

the

surround

mode.

MODE:

Selects

the

surround

mode.

T.(Test)

TONE:

Generates

a

pink

noise

signal

that

is

sent

in

succession

to

each

speaker.

DELAY:

Adjust

the

delay

time.

FUNCTION

selectors:

Select

an input

source

of

the

amplifier.

(for

the

amplifier)

REAR

VOL

+/—

buttons:

Control

the

volume

of

rear

speakers

(surround

level).

CENTER

VOL/TV

VOL

+/—

buttons:

Control

the

volume

of

center

speaker

(surround

level)

or

TV.

DBFB

button:

Turns

on/off

the

DBFB

(Dynamic

Bass

Feed

Back).

(for

the

amplifier)

MASTER

VOL

+/-

buttons:

Control

the

amplifier

volume

(for

the

amplifier).

inserting

the

batteries

into

the

remote

commander

1

Open

the

cover.

2

Insert

two

size

AA

(R6)

batteries

with

correct

polarity.

Battery

life

About

half

a

year

of

normal

operation

can

be

expected

when

using

the

Sony

SUM-3

(NS)

batteries.

When

the

batteries

are

exhausted,

the

commander

can

no

longer

operate

the

unit.

Replace

both

batteries

with

new

ones.

To

avoid

battery

leakage

:

When

the

commander

is

not

to

be

used

for

a

long

period

of

time,

remove

the

batteries

to

avoid

damage

caused

by

battery

leakage

and

corrosion.

—

4

—

SECTION

2

IC

FUNCTIONS

e

1C101

(

.PD75206GF-

722-

3BE)

Port

1/O

|

ACT

|

RESET

Outside

I

High

DIGIT2

DIGIT1

DIGIT3

DIGIT4

High

:

5

ioe)

ine)

Ae

High

DIGITS

DIGIT6

DIGIT7

DIGIT8

High

oO

=|

High

jo)

ss

DIGITS

a

ee

ef

tr

5

t10

REAR

MUTE

FRONT

MUTE

Z

OQ

13

High

—

>

t12

t13

z

iw)

to

ale

—

os

ae

a

Si

ol

High

(NO

USE)

V-1

REC

(NO

USE)

SURROUND

A

SURRONUD

B

—

30V

Gait

17

t15

18

ee

|

ee

oO)

+

—,

>

Vload

ff

co

vpre

DBFB

SEG1

SEG2

SEG3

SEG4

—

oO

|

bh

i)

)

n

x

High

do

RAS

High

SEGS/KEY5

OUT

5

ele

(St)

=

-

nN

ror)

<

NO

on

n

High

DD

~

n

[ee

SEG6/KEY4

OUT

4

SEG7/KEY3

OUT

3

SEG8/KEY2

OUT

2

SEG9/KEY1

OUT

1

STOP

KEY

IN

2

28

High

i<o)

coo

Oo

High

+

ol

n

BG

ise)

bo

rar

oO

p0l

1

High

:

High-impedance

status

In

:

Input

status

Cre

[ma

[0

|

amr

[reser

[owe

[

=»

[ow

[i

fe)»

|

+

pews

L

KEY

IN

5

a9

n

oo

ol

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I

Ko)

—

i)

WwW

fon)

RM-IN

1

~

(oe)

=

uo)

ay

ie)

KEY

IN

1

i

pa

|

(oe)

oo

Ke)

—

ao

q

Oo)

ko)

—_

lee

POWER

SW

ST

LC7535

ST

LV1001M

VOL

+

.

(se)

ite)

Ko)

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lord

=}

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re

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:

a

fe

(a)

p31

|

oH

|

In

VIDEO

B

(NO

USE)

46

133

AUTO

LED

CD

CONTROL

CLOCK

DATA

FRONT

SP

RELAY

REAR

SP

RELAY

CENTER

SP

RELAY

CENTER

MUTE

POWER

RELAY

P

LOGIC

i

p6l

49

p62

p63

lore

3

oT

Oo

la)

»

b

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=

3

=)

*

_

iW)

alalata

<

B

ot

—s

x

zt2

p50

p51

p52

p53

(NO

USE)

P

LOGIC

2

P

LOGIC

3

P

LOGIC

4

P

LOGIC

5

(op)

it

=}

jor) [o%)

OD

[op]

Rss

—

5

High

:

High-impedance

status

In

:

Input

status

e

1C304

(LV100M)

De-couple

capacitor

for

threshold

voltage

Capacitor

for

smoothing

of

rectifier

output

Capacitor

for

sliding

band

filter

and

Delayed

output

Capacitor

for

sliding

band

filter

Capacitor

for

pre-emphasis

61

,

60

Input

filter

for

rectifier

Input

filter

for

rectifier

Reference

voltage

Reference

voltage

Mute

control

(no

use)

Vec

Output

for

Vop

Clock

input

for

serial

input,

data

input

for

parallel

input

mode

Data

input

for

serial

input,

data

input

for

parallel

input

mode

Column

address

selection

for

serial

input,

data

input

for

parallel

input

mode

Row

address

selection

for

serial

input,

data

input

for

parallel

input

mode

18

to

32

Connection

to

memory

device

Vss

—_

aa

X'tal

resonator

for

oscillator

a

X'tal

resonator

for

oscillator

Long

or

Short

mode

selection

(no

use)

Serial

or

Parallal

mode

selection

For

test

mode

(no

use)

13

14

15

16

24

33

34

35

38

Smoothing

for

NR

rectifier

39

Smoothing

for

NR

rectifier

40

Capacitor

for

weighting

on

side

chain

path

4l

Input

for

variable

resistor

42

NR

output

43

7kHz

low

pass

filter

output

44

Input

for

NR

45

Capacitor

for

de-couple

on

NR

46

Delay

output

or

NR

output

47

Input

for

mute

circuit

(no

use)

48

Output

for

mute

circuit

(no

use)

49

Output

for

7kHz

low

pass

filter

(no

use)

Input

for

7kHz

low

pass

filter

GND

Input

for

right

channel

|

Input

for

ieft

channel

Capacitor

for

de-couple

on

Fixed

matrix

output

35

Noise

shaping

and

delay

input

35

Noise

shaping

output

|

57

Delay

input

signal

mode

select

switch

(eR/L

=P)

38

Filter

for

supply

voltage

on

comparator

53

Canacitor

for

sliding

band

filter

and

local

decoder

output

—

—F—

Input

Address

Port

Timing

SHORT

MODE

tCY

SCLOCK

tSDH

SDATA

—{onra

[onta)[oaray{oaray{oarayoaTayoura

MSB

|

LSB

tSTH

SRAS

SCAC

Ng

fl

!

—-

tSTW

In

case

of

short

mode,

delay

time

setting

is

set

in

above

timing.

The

date

loaded

to

SDATA

is

written

on

the

leading

edge

timing.

In

order

to

select

that

the

data

latch

for

row

address

strobe

or

column

address

strobe

is

loaded,

SRAS

or

SCAS

port

is

controlled.

When

changing

delay

time

setting,

meaningless

data

on

a

memory

are

read.

this

causes

the

pop

noise.

when

SRAS

or

SCAS

is

controlled,

mute

circuit

(pin

55

is

input,

56

is

output)

is

activated.

Mute

time

is

the

same

as

the

delay

time

which

is

set

at

that

time.

(Serial

data

input

mode

only,

On

parallel

data

input

mode,

mute

circuit

is

activated

by

using

the

mute

control

port

18.)

On

long

mode,

input

data

number

is

9,

the

way

of

setting

delay

time

is

same.

SECTION

3

DIAGRAMS

3-1.

CIRCUIT

BOARDS

LOCATION

POWER

BOARD

REAR

BOARD

SP

BOARD

FUSE

BOARD

SURR

SP

BOARD

SW

BOARD

REG

BOARD

(AV431)

CONNECT-2

BOARD

HP

BOARD

CENTER

BOARD

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MAIN

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DISPLAY

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Sony TA-AV431 User manual

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