Sony Ta-f4a User manual

GENERAL

Power

Requirements:

Power

Consumption:

Dimensions:

Weight:

AMPLIFIER

SECTION

Continuous

RMS

Power

Output:

(Less

than

0.3%

THD,

both

channels

driven

simultaneously)

AEP

Model

INTEGRATED

STEREO

AMPLIFIER

SPECIFICATIONS

220V

ac

(or

120V

ac

by

internal

rewiring),

50/60

Hz

170W

Approx.

410

(w)

x

145

(h)

x

310

(d)

mm

165/16

(w)

x

53/4

(h)

x

12

1/5

(d)

inches

including

projecting

parts

and

controls

Approx.

7.2kg,

15

lb

14

0z

(net)

Approx.

9kg,

19

lb

14

0z

(with

shipping

carton)

At

1kHz

40+

40W

(8)

At

26—20,000

Hz

40

+

40W

(829)

According

to

DIN

45500

45+

45W

(8)

SAFETY-RELATED

COMPONENT

WARNING!!

COMPONENTS

IDENTIFIED

BY

SHADING

AND

A

MARK

ON

THE

SCHEMATIC

DIAGRAMS,

EXPLODED

VIEWS

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

PUBLISHED

BY

SONY.

Power

Bandwidth:

Damping

Factor:

Harmonic

Distortion:

IM

Distortion:

(60

Hz:

7

kHz

=

4:1)

Frequency

Response:

Residual

Noise:

5—35,000

Hz,

IHF

35

(82,

1kHz)

Less

than

0.3%

at

rated

output

Less

than

0.1%

at

1W

output

Less

than

0.3%

at

rated

output

Less

than

0.1%

at

1W

output

PHONO

RIAA

equalization

curve

+0.3dB

TUNER

AUX

TAPE

1.

TAPE

2

(REC/PB)

Less

than

300uV

(89,

network

A)

5—100,000

Hz

+

0.50B

—

Continued

on

—

SON

Y.:

SERVICE

MANUAL

TA-F4A

Inputs:

Maximum

Input

S/N

Sensitivity

|

Impedance

|

Capability

{0.2%

distortion)

(weighting

network,

input

level)

2.5mV

150

mV

80

dB

PH

nee

{-50

dB)

(-14.5dB)

(A,

2.5mV)

TUNER

AUX

TAPE

1

TAPE

2

(REC/PB)

150

mV

(-14.5

dB)

Outputs:

Output

Level

Impedance

150

mV

E

:

REC

OUT

1

(-14.5

dB)

4.7k2

REC/PB

poe

82k2

Accepts

low

and

high

impedance

stereo

headphones

SPEAKER

Accepts

speakers

of

8-162

HEADPHONES

Tone

Controls:

Filters:

BASS

+10dB

at

60

Hz

(turnover

frequency

300

Hz)

TREBLE

+10dB

at

25kHz

(turnover

frequency

5

kHz)

LOW

6dB/oct.

below

15

Hz

HIGH

6dB/oct.

above

9

kHz

0dB=0.775V

1-1.

SERVICING

NOTE

SECTION

1

OUTLINE

When

replacing

a

knob

(

SPEAKERS

/

TREBLE

/

BASS/BALANCE/FILTER/TAPE

COPY/MONITOR/

FUNCTION),

prepare

a

knob

cap

(4-854-266-00)

and

a

knob

mold

(4-854-267-00).

Installation

of

the

knob

is

as

follows.

SPEAKERS

TN

@

Coincide

a

slit

with

a

mark.

Knob

Mark

Position

Y

i)

TAPE

COPY

li

MONITOR

slit

FUNCTION

0

Turn.

knob

mold

1-2.

BLOCK

DIAGRAM

Sate.

S$2-1

FUNCTION]

[MONITOR

TUNER

J101

£Q

AMP

PHONO

PHOWO

Qlol~

103

J102

Tua]

©

4103

ag

|e

s3

[TAPE

COPY

rare

7

@

“o

TAPE

1-2

31-1

SOURCE

OTAPE

2~1

©

TAPE

1

+2

105

REC

OUT

1]

O-

o=hO

TAPE

21

CNJ4

$3-2-|

TAPE

2

CREC/PB)

SOURCE

BALANCE

R-CH

@

R-CH

IS

OMITTED

TAPE

1

RV

201

RV1

VOLUME

}

OTAFE

2

ORIVE

AMP,

B+

RIPPLE

EQ

AMP,

,

FILTER

Be

ato4

DRIVE

AMP,

B-

RIPPLE

EO

AME,

FILTER

B=

Q105

POWER

AMP

Q201

DRIVE

AMP

1¢

204

POWER

AMP

Q202

TA-F4A

—@

If

necessary,

widen

the

slit.

@

Coincide

@

with

the

mark

and

install

the

knob

cap.

knob

cap

Part

No.

Description

X-4854-213-1

Knob

Ass’y

including;

4-854-266-00

Cap,

knob

4-854-267-00

Mold,

knob

s5

POWER

AMP,

B+

POWER

AMP,

SPEAKERS

TM

101

°

[SPEAKER

A

TM

102

8

SPEAKER

B

3401

ey

fo]

HEADPHONES

$6

3

EH)

TA-F4A

SECTION

2

DISASSEMBLY

Note:

Follow

the

disassembly

procedure

in

the

numerical

order

given.

CASE

AND

BOTTOM

COVER

REMOVAL

Case:

@

to

O

The

component

side

of

the

speaker

board

and!

main

amp

board

can

be

checked.

Both

side

of

the

EQ

amp

board

can

be

checked.

Bottom

Cover:

@

to

@

The

conductor

side

of

the

main

amp

board

can

be

checked.

@

screw,

©

BW4x12

©

BVTT

3x6

screw,

©)

BW

4x12

@

BVTT

3x6

FRONT

PANEL

REMOVAL

The

POWER

switch,

meters

and

variable

resistors

can

be

replaced,

after

removing

the

front

panel.

METER

LAMP

REPLACEMENT

Note:

To

obtain

the

same

brightness

of

meter

lamps,

replace

both

lamps

(L-CH

and

R-CH)

together

with

new

ones.

C1)

adhesive

tape

(transparent)

C3)

knobs

(with

2mm

L-shaped

hexagona/

wrench)

@

1-518-309-00

meter

lamp

e

BVTT

3x6

meter

cover

TA-F4A

|

slit.

nark

my

INES

SECTION

2

DISASSEMBLY

Note:

Follow

the

disassembly

procedure

in

the

numerical

order

given.

CASE

AND

BOTTOM

COVER

REMOVAL

Case:

@

to

@

The

component

side

of

the

speaker

board

and!

main

amp

board

can

be

checked.

Both

side

of

the

EQ

amp

board

can

be

checked.

Bottom

Cover:

@

to

@

The

conductor

side

of

the

main

amp

board

can

be

checked.

@

screw,

@©

BW4x12

OQ

BVTT

3x6

FRONT

PANEL

REMOVAL

The

POWER

switch,

meters

and

variable

resistors

can

be

replaced,

after

removing

the

front

panel.

knobs

(with

2mm

L-shaped

hexagonal

wrench)

@

BVTT

3x6

METER

LAMP

REPLACEMENT

Note:

To

obtain

the

same

brightness

of

meter

lamps,

replace

both

lamps

(L-CH

and

R-CH)

together

with

new

ones.

@

adhesive

tape

(transparent)

meter

cover

@

1-578-309-00

meter

lamp

SECTION

3

ADJUSTMENT

|

TA-F4A

DC

Bias

Adjustment

Note:

1.

Perform

adjustments

a

few

minutes

passed

after

POWER

switch

turned

ON.

2.

With

no

signal

input.

Adjust

RT201

for

11

mV

dc

reading

on

VOM.

RT201

(L-CH)

Meter

Level

Adjustment

Setting:

VOLUME

control:

maximum

Procedure:

l.

af

osc

oo

attenuator

100k2

82

(1W)

page)

oO

i

e)

O—O

O

Ne

scoot

=

Fiz

te

ea

teasl

SPEAKER

Adjust

attenuator

for

2.83V

(1

W)

reading

on

VTVM.

Adjust

RT401

(L-CH)

and

RT451

(R-CH)

so

that

meters

indicate

1

W.

Adjust

RT251

for

11

mV

dc

reading

on

VOM.

RT251

(R-CH)

TA-F4A

SECTION

4

4-1.

MOUNTING

DIAGRAM

DIAGRAMS

_

C

VOLTAGE

SELECTOR

BOARD

(COMPONENT

SIDE

)

CINPUT

BOARD}

(CONDUCTOR

SIDE)

(GRN)

Ic201,

1C251

BLOCK

DIAGRAM

Yt

CURRENT

MILLER

OF

bern

DIFFERENTIAL

BIAS

at

AMP

2

CIRCUIT

B-CLASS

DRIVE

AMP

Ji52

«J

153

a,

WHT

|WHT

{feo

AG:

FF

CHASS!S

GROUND

[C

MAIN

AMP

BOARD

J

(CONDUCTOR

SIDE)

0251

9202

;

R218.

Ik

ard

feo

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y

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22cm

oo

Ge

HO

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ae

ay

40

Vs.

Nace

F

oe

R220

: Z |

:

0.22(

2W)

{EQ

AMP

BOARD

J

(CONDUCTOR

SIDE)

JAPAN

DC

BIAS

CHECK

Cat

ms

Ls

<

==)

(0.01/500V

=

-40V

RIG2

33k

x

C160

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C266

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DB

DN

4

IN

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C210"

259°

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|

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0.012

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330

BALANCE

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a

at

aia

252

251

209

208

202

201

105

1€251

1C201

207

102,103

104

152,

153

253

203-206

204

205

264.

262

26!

263

206

207

214-212

21

213

203,

201

2

259

260

210

209

205

208

202,

204

(GRN)

1C201,

1C25!

DIFFERENT!

AMP

|

BLOCK

DIAGRAM

CURRENT

MILLER

DIFFERENTIAL

AMP

2

B-CLASS

DRIVE

AMP

BIAS

CIRCUIT

C

VOLTAGE

SELECTOR

BOARD)

(COMPONENT

SIDE

)

B-CLASS

DRIVE

AMP

C

MAIN

AMP

BOARD

(CONDUCTOR

SIDE)

RVI

100KA)

2V203

100k

aA

AE

|

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1C251

252

C201

251

209

208

202,

20

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206

204

205

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261

263

206 207

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213

203,

201

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259

260

210

209

205

208

202,

204

ARR

tk

(SPECIAL)

ad

a

LL

POWER]

ON

OFF

CHASSIS

GROUND

Note:

O—:

parts

extracted

from

the

component

side.

@—:

parts

extracted

from

the

conductor

side.

™:

part

mounted

on

the

conductor

side.

:

B+

pattern

Signal

Path

oe

ee

|

LCH

meee

me

op

>

R-CH

meee

©

L-CH

or

R-CH

Color

code

of

sleeving

over

the

end

of

the

jacket.

fn

J401

[HEADPHONES]

ES

[i2]

401

402

451

452

4-2.

SCHEMATIC

DIAGRAM

Jil

CINPUT

BOARD]

104

|

ee

J05

aa

REC

OUT]

ROP

BOK

CNJ!

TAPE

2

REC/PB

QIOl

28C2129

EQ

AMP

CEQ

AMP

BOARD

]

Ql02

2SA872

=

Q103._

2SCi632

AMP

23V_EMITTER

FOLLOWER

$2

MONITOR

TAPE

2

CMAIN

AMP

BOARD

}

SOURCE

TAPE

|

S2-]

Reve

ie

BALANCE

+

C202

0,22

om

$3

TAPE

COPY

TAPE

2>1

SOURCE

{

TAPE

|+2|

lis)

REC

OUT!

a

R-CH

Jt5I

QISI_

2sc2i29

EQ

AMP

RIS)

cist

W

RIS3

aes

bo152

oy

20V

QI5I

t)

~06V

$

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RIS4.

C160

QH2

2SA872_

QIS3._2SCI632

AMP

23V

Ciba

RIG

si

20.6V

ise

a

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(je

css

|

Ss

L6V"L_ayy

RIGO

RIS?

RIS

C156

CIS?

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SRi6l

RIGS:

EMITTER

FOLLOWER

$3

[TAPE

COPY

TAPE2—>

|

SOURCE

TAPEI—=

2

n

Ny

MONITOR

R252

——J

R254

[BALANCE]

C252

$4-2-2

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S4[FILTER

LOW

‘

R

104

J

(M)

RVI

100k(A)

(C201

CXI7]

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IS2076A

D214

M

DRIVE

AMP

C1986

Q203,204,206,

207

2:

AMP

PROTECTOR

wens

A

RV2

(A)

Ri

100K

{C253

OV,

[Ic

b

DIFFERENTIAL

AMP

2

DIFFERENT

AMP

VAL

|

CURRENT

=

BIAS

CIRCUIT

VI2N

=

-D2I2

IS2076A

=

Q201

2SA77I

=

Q202

25!

POWER

AMP

POWER

40

OC

BIAS

CHECK

POINT

0208

MV203V

—

2

(SPEAKER

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1

[ETE

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gy

0205

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GROUND

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AMP

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R256

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|

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=

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|

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REG

CURRENT

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4

|

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faal

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@)

7251

47k

DC

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(

RV203

100k

0209

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D210

1T22A

R230

47k

SPECIAL}

D261

IS2076A

D264

MVIZ2N

=:

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IS2076A

=

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2SA77I

POWER

AMP

40v

25!

role

tae

|

R270

c2i9

55

O/ev

~234V

100k

(SPECIAL)

C259

0259

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D260

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Q252

2SCI986

Q253

2SC634A

POWER

AMP

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Cie

100

25V

ft

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105

2SA678

RIPPLE

FILTER

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0205

0206

24v

R310

22k

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C304

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25v

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RECT

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1.5k

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AMP

POWER

AMP

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:

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C401

R403

RT401

2.2k

Cil2

100

us

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25v

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47

is)

20

RIIZ.

{

EQ

JAMP

BOARD

}

0206

305

4

25v

2ay

em

lA

Rau

24)

Aik

S

209

I

QI05

2SA678

RIPPLE

FILTER

~40V

0205,206

EQAOI-25

308

(0.01/500V)

x2

oP

‘

ae

>

0263

020i

0204,

0204

uH_~+_

C309

(0.01/500V)x2

!

}-

23.4V

Q209

2SA678

=

D201~204_

SIBOI-B

REG

RECT

4

=

y)

mus)

40V

=

x

S

ole)

RED

F201

SISA

cool

0.047/300V

E

VOLTAGE

SELECTOR

BOARD

BRN

0

OFF

N

CNP2

~AC

II

TA-F4A

ote:

The

components

identified

by

shading

and

/\

mark

are

critical

for

safety.

Replace

only

with

part

number

specified.

Note:

@

Components

for

right

channel

have

same

values

as

for

left

channel.

e

All

capacitors

are

in

uF

unless

otherwise

noted.

pF

=

nuk

SOWV

or

less

are

not

indicated

except

for

electrolytics.

e

All

resistors

are

in

ohms,

%W

unless

otherwise

noted.

kQ

=

10002,

MQ

=

1000

kQ

e

All

adjustable

resistors

have

characteristic

curve

B,

unless

otherwise

noted.

e

-f4}

:

nonflammable

resistor.

©

ome:

B+

bus.

e

:

panel

designation.

e

((__)

:

adjustment

for

repair.

©

meme:

B-

bus.

@

Voltages

are

dc

with

respect

to

ground

unless

otherwise

noted.

@

Readings

are

taken

under

no

signal

conditions

with

a

VOM

(20k2/V).

e@

Voltage

variations

may

be

noted

due

to

normal

produc-

tion

tolerances.

e

Switch

Position

Switch

PHONO

SOURCE

FUNCTION

MONITOR

TAPE

COPY

FILTER

OFF

SPEAKERS

A

POWER

OFF

D201—204

oe

\:

U05G

(S1B01-B)

cathode

D207,

209

\:

~

D259

:

a

D210,

260

“

DW.

D401,

451

\

ano

aa

D402,

452

D211,

261

\

D212,

262

D205

none

t

EQB01-25

(EQA01-25)

cathode

lq

og

a,

-

‘andile

anode

Replacement

Semiconductors

For

replacement,

use

semiconductors

except

in(

—).

0101,151:

2SC2129

Q103,153:

2SC632A

(2SC1632)

a104:

2SC634A

(2SC1634)

203,

204

).

Goo

907

‘

2SC634A

:

al

E

Fe

%s

Q102,152:

2SA705-8

(2SA872)

c c

6)

©)

E E

Fc

E—E

CB

0105,

205).

cons

ie

2SA678

Cc

)

E

cy

Q201,

251:

2SA771

c

HEL.

E

ac

F

Q202,

252:

2SC1986C

(2SC1986)

1C201,251:

CX171

14131211109

8

1234567

{Top

view)

D208:

MV203V

K

1S1555

anode

cathode

1722AM

(1722)

Ls

E

1S2076A

D213,

263

)

.

ay

Bod.

Seah

MV12N

.

cathode

{~

anode

TA-F4A

|

4-3.

MOUNTING

DIAGRAM

—

Speaker

Board

—

Conductor

Side

—

METER

LEVEL

:

(Ligs

R402.

1.5k

(1/2W),

ie

smart

AA

anensmennn

cated

“Jcaog

Tzz/iev

©.

2:2

[30d

:

R403

Hk

(I72wy

oe

,

9401

C451

F

—

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(1/2W)

ee

|

eh

OA

i

2.2/50V.

PR)

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—@.

om

ce

tf

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15k

(1/2)

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RT4SE

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S

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L451

L.22yH

Q

wz

o

R451.

10.172)

ow

mt

(so

i

Zz

SH

L401

L22pH

|

R404

10(1/2W)

J401

|

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Sony TA-F4A User manual

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