Sansui Au-x1 User manual

SUPER

I,

Nl'EGRA

TED

AMPLIFIER

SANSDI

AU-Xl

SANSUI

ELECTRIC

CO.,

LTD.

AU-X1

\

SPECIFICATIONS

Power

output

Min. RMS,

both

channels

dr

With no

more

tha~

0.007

%t "

~rmonic

distortion

160

watts

per

channel

into

8

ohms

Load

impedance

. . . . 8

ohms

.

Total

harmonic

distortion

(POWER

A},1P

IN)

. . . . . . .

....

less

than

0.007

%

at

or

below

rated

min. RMS

power

output

Intermodulation

distortion

(70

Hz : 7 kHz =4:1 SMPTE

method)

(POWER AMP IN)

less

than

(j.007 %

at

or

below

rated

min

:·

.RMS

power

output

Risetime

...

0.5 .

.Slew

rate

FreqlJ'ency response

(at

1

RIAA curve

deviation

(PHONO,

20

Hz

to

20

kHz)

..........

+0.2

dB>

...

0.2

dB

Input

sensitivity'and

impedance

(·1

kHz,

for

rated

power

output)

PHONO (MC)

....

0.1

mVt200

ohms

(Max.

input

capability:

40

mV

at

1

kHz,

le

ss

than

0.0

I %

total

harmonic

distortion)

PHONO (MM)

...

'2.5

mV/41

kilohms

(Max.

input

capability:

330

0.01 %

total

harmonic

AUX/TUNER,

TUNER,

POWER AMP

IN

.,

1

Output

level

and

impedance

(1

TAPE

REC . .

200

mV

into

47

kilohms/

600

ohms

PREAMPOUT

1 V

into

'

47

kilohms/

600

ohms

Channel

separation

(1

kHz,

at

rated

power

output)

PHONO (MC)

..

.

70

dB

PHONO (MM)

...

75

dB

AUX/TUNER,

TUNER,

TAPE

PL~

V

y

. . . . . . .

80

dB

Hum

and

noise

(short-circuit,

A.n~tWork)

PHONO

(MC) . . . .

76

dB . .•.

».

PHONO (MM)

...

91

dB;;;

'

AUX/TUNER,

TUNER,

TAP£pLAY

........

10QdB

Controls

SUBSONIC . . . - 3 dB (

16Hz),

6

dB/oct

J!JMP

..

.

..

. -

14dB

Power requirements

Power

voltage

....

100,120,220,240

V

(50/60

Hz)

Po~er

consumption

Rated

consumption

500

watts

Dimensions

480

mm (18-15/16") W

197

m

'11

(Z:13/16") H

450

,rnm

·3/4

H)

D

27.7

k '

lbS)

net

30.4 k )

packed

* Design and

specifications

5U~,ect

to

c.hanges

without

notice

for

improvements.

1.

BLOCK

DIAGRAM

<SIGNAL

BLOCK)

L-CH

AUX@~------------~

REC

@

SOl

i

Master

Volume

SOlO

TAPE

I

----+-+-

-

---'=e=+~=t=t_

PLAY

@----

S02e

REC

@'--~j--

-

--::1

TAPE

2 .

____

L~======:::'J

PLAY

@----

<RELAY

BLOCK)

PHONO

I@;---....,

PHONO

2@;------='

__

_

F-2780

F-2780,

F-2776

Seleclor

SOIl.-d)

Phono

1···210NI

Soil.·,)

Phooo

2···2

5011

'.1)

Tun

...

--'--2

SOllm.p)

Au~/Tuner--2

F-2772

+-D4----+

......

'-------+-.H

S6010

S601

b

I

@'-------'

POWER

AMP

IN

2@'--

-----l

@I

PRE

OUT

@2

F'2780,F-2776

T~

Ploy

So2I,·d)

Source

···-2

So21.·hI

Tape

1,---2

50211-1)

Tope

2-",2

2-·-QN

IReleose

Type

Swilch)

Sol--Shorling

Swilch

F-2774

Tape

Copy

S602I,·d)

I.

Au~!Tun",

5.5-1-2

2.

Tuner

6.

5-2-1

3.

Off

4.

Source

(

Muting)

__.L.--~·-Moster

Volume

RL6040

'--------------«1

~

AuxlTuner

SOlo

PHONE

0--------<)

SP-A

SP-B

F'

2777

MM

MC

Seleclor

SOII,·DJ

Phano

2

I···MM

2-·MC

Phono

I

I-'MM

c·MC

I···

OFF

2

ON

• The switch SOl

is

sharting

type

and generates pulse

to

function

the

relay circuit at switching.

• The

SOlon

F.2776, F-2777

is

interlocking switch and only a contact

or

contacts joined by

dotted

tine can be ON state (2 side) and others are released

(1

side).

u

AU-X1

2.

THE

OPERATION

&

CHARACTERISTIC

OF

HIGH

SPEED

POWER

TRANSISTOR

In

order

to

up-grade

the

sou

nd

quality,

AU-Xl

employs

the

cir-

cuitry

of

the

push-pull

drive

DC

comfiguration

from

MC

head

amp

to

po

'

wer

amp

stage, which provi

de

superior

dynamic

and

open-loop

characteristics

.

The

improvement

was

made

for

parts

such

as volumes, wires, relays,

electrolytic

capacitors

and

semi-conductors.

In

particular

, newly

developed

linear high speed device, LAPT

(Linea

r

Ampl

ifier Power

Transistor)

is

adapted

in

power

stage,

and

the

combination

use

of

this

high speed

power

transistor

and

diamond

differential

circuit

allows slew

rate

of

260

V

Ills

and

wide range low

distortion

amplifi-

cation

.

2-1. High Speed Power Transistor

The

requirements

for

power

trnasistor

in

order

to

elevate

sound

quality

are;

*

to

have high cut'<lff

frequency,

fT

(high speed device).

*

to

make

voltage

dependance

of

DC

forward-current

transfer

ratio,

hFE

be little and have

excellent

linearlity.

*

to

have a large

A.5.0.

(Area

of

Safe

Operation)

and

strong

en-

durance

against

break-down

.

The

use

of

high speed

power

transisto

r

with

requirements

above

together

with

circuit

improvement

is

effective

for

achievement

of

wide range and low

distortion

'

amplification

.

Transistors

to

meet

with

these

requirements

are

both

bi-polar and field

effect

transistor

(FET).

Note:

Cut-off

frequency,

fT

shows

the

frequency

at which

the

small signal

current

gain will be 1

(0

dB) in

common

emitter

circuit.

Comparison between bi-polar and field effect type as power

transistor.

Table

1;

Comparison

of

bi

-

polar

and field

effect

type

as a

power

device.

Field

effect

Characteristics

Bi-polar device

junc

-MOS

FET

type

tion

type

FET

SIT

Input

impedance

low high high

Thermal

coefficient

of

positive negative negative

operating

current

StOlied carrier

effect

exist

none none

(Carri

er

strage

effect)

Transfer

character

istic

exponential

square

Idring

current

as a little large large

output

device

Output

characteristic

pentode

triode

pentode

State

at

no

input

bias

off

on

Current

path

(Channel) vertical vertical vertical &

horizontal

Threshold

voltage low inter- high

mediate

Cost low high high

The

advantages

of

FET

are high

input

impedance

and no

thermal

run-away because

of

negative

thermal

coefficient

of

operating

cur·

rent

however

there

still

remains

price

problem

on

FET,

in

addition,

bi-p~lar

type'

high speed

power

transistor

are variously developed

and

becoming

common

so

that

AU·X1

employs

bi-polar

type

power

trnasistor

(LAPT).

2-2.

The

Configuration

of

High Speed Transistor

In

order

to

increase

the

cut-off

frequency,

fT,

it

is

necessary

to

make

transistor

base as

thin

as possible,

but

it

oppose

to

A.S.O.

(Area

of

Safe

Operation)

to

enlarge. When

making

the

transistor

base

thill,

the

injected

current

density

is increased so

that

junction

is

destroied

by

second-breakdown.

To

solve above

problem,

the

con-

struction

of

power

trans

i

stor

(LAPT)

is

parallel

connection

of

devided 35

of

small signal

transistors,

in

addition,

the

defusion

resistor

is

made

at

each

emitter

of

devided

transistor

to

equalize

the

flowing

current.

Fig. 1

Illustration

of

emitter

ballast

resistor

made

by

defusion.

B

ase

emitter

n"

Fig.2

Equivalent

circuit

of

ballast resistor

defused

to

emitter

of

transistor.

"

r§

"'

1COllecto

r

Ba

se

b

all

ast resistor

,

..

/ (

de

f

fusi

on

res

istor)

... emitter

Fig. 3

Surface

of

LAPT

before

evaporation.

e

mitt

er contact

I

By

connecting

many

small signal

transistors

with

high fT in parallel,

power

transistor

with high fT and large A.S.O. can be

obtained.

If

there

is

current-concentration

to

one

of

small signal

transistors,

the

voltage

between

emitter

and base

is

decreased

by

the

ballast

resistor

(deffusion

resistor)

at

emitter,

which causes

internal

negati~e

feedback

and relieves

the

current-con~entration.

2-3.

The

Characteristic and Merit

of

use

of

High

Speed Power Transistor

•

The

relation

between

switching

time,

fT,

and

hFE

of

power

transistor.

Fig.4

Switching

time

i

np

u

t

~

: :t

st

~

-- d

ON

t--

--

1,1

-I

t 1

~

I-

t l 0

Qu

tputwavefo

rm-

,

-

~-----:-:-

-

-T

lOYo

: : I

90%

Fig. 5

Influence

of

switching

time

against sine-wave

(of

half

cycle)

~

,_t

s

~g

..

ton

........t

urn-ont

ime l

tON I \

tt

I

..

" \ : ".. tf ··.. ··

··f

a

ll

t

im

e _ switching time

.J

..

~

..

tstg ·······

·st

orage t

im

e

The

more

the

switching

time

is

shortened

(high speed)

the

more

the

frequency

range

characteristic

of

power

transistor

is

improved;

this

relation

is

indicated in Fig.

4),

5).

Fig.

6),

7),8)

show

the

more

the

fT

is

raised

the

more

the

switching

speed

is

quickened.

2

i

AU-X1

• The relation between switching time, fT and

hFE.

(x,

ll,

0,.

showing

the

quantity

of

transistor & distribution)

10 Fig. 7

Fig. 6 (NPN)

50

tstg- h

FE

(NPN)

30

i

20

'il.

2

~

.;:;

~

10

0.5

3

0.3

10

30

50

lOO

300

IM

3M

5M

hFE(5V/IA)

Next,

the

following Figs show

that

the

relation between high fT

of

power transistor and short periode

of

tstg influences the improve-

ment

of

distortion (THD) effectively

in

audio amplifier.

Fig.

9),

10)

show

the

THD becomes

better

when tstg

is

faster.

Fig.

11),

12) illustrate

the

relation between

output

current wave-

form

of

emitter

and distortion wave-form. From these Figs, it

is

• OutPl,lt wave-form & distortion wave-form near

at

clipping point.

O.l%range

IOV/div

Fig.9

T.H.D. 0.

1%

tstg =

1.6,us

I

switching distortion

• Wave-forms

of

emitter

current and distortion

(condition)

Po~

40W

Fig.

11

RL

~

8fl

.-

f ~

50KHz

lE

wa

veform(

NPN

)

2A/DIV

lEwaveform(PNP)

monitor

wav

eform of

distortion meter

0.1

%range

O.5V/div

T.H

.

D.

0052%

fT(NPN/PNP) = 4.0/8.0MHz

N

PN

tf-

IT

Fig

. 8

tON

-

fT

1.0

(NPN)

0.5

\

!

0.3

5 0.2

0.1

0.05

IOM

30

M

50

M

lOOMz

IM

3M

5M

IOM

30M

SOM

lOOMz

fT(5V/IA) fT(5V/IA)

obvious when the fT

of

power transistor

is

low

the

output

current

wave-form becomes dull, and

the

switching function

at

B class push-

pull operation

is

not

performed precisely.

These above

phenomenon

causes

the

increase

of

ope

rating current

and deterioration

of

distortion.

Fig.

10

T.H.D.

0.035%,

ts

tg

=0

.

5,us

Fig.

12

T.H.D.

0025%

fr

(NPN/PNP) = 30/21MHz

N

PN

d\A}

v

~

L-

__

___

3

______

____________

______

__________

______

__

________________________________________________

~

3.

PARTS

LOCATION

&

PARTS

LIST

3-1. F-2917 MC

Head

Amp

L-CH Circuit Board (Stock No.

7551421)

3-2. F-2918

MC

Head

Amp

R-CH

Circuit Board (Stock No.

7551431)

Conductor

Side A

J

POl

B

1

2

R50

SANSUl

F-29H

~

'

PRl

~)

('

3

'"

U

Since

some

of

capacitors and resistors are

omitted

from parts lists in this Service

Manuai, refer

to

the Cornmon Parts List

for

capacitors

& resistors which was

appended

previously

to

each Sansui Manual.

Parts List

Parts

No.

Stock

No.

Description

Position

_Transistor

F·29

17

F·2918

TROl

0301090

.

2SA992

F.

E

28

4A

TR02

0306740.

2SC1845

F.

E

2A

48

TR03

0306740.1

2SC1845

F.

E

18

3A

TR04

030

1

090.

1

2SA9

92

F.

E l A

38

TR

05 0

3067

4

0.

1

2SC1

84

5

F.

E

18

3A

TR06

030

1

090.

1

2S

A992

F.

E

lA

38

TRG7

0308501.2

2SD

35

7

D.

E

18

3A

TR08

0303331

. 2

2S8527

D.E

lA

38

.FET

FETOl

-

02

03

7

0344

- 7

2SK163Ml.

M2

.

Nl.

N228

4A

FE

T08

-14

0370334

- 7

2SJ44Ml

<

M2,

N l ,

N2

2A

48

.V

a

ristor

D 0 1

03

40170

MV

1

03

18

3A

D

02 03

4

0170

MV

1

03

18

3A

C 01

0622102

1000pF

125V

P.C.

28

4A

C 04 0581014

O.047j.iF

400V P,C.

iA

3A

C

10

0622102

1000

pF

125V

P.C.

18

3A

C

11

0622

1

02

1000pF

125V

P.C.

lA

38

C 12

0623300

30p

F

125V

P.

C,

18

3A

C 13

0623300

30pF

125V

P.C.

lA

38

C 14.16

0602109

l

/-l

F

100V

M.C

18

3A

C 17

0622

1

02

lOO

Op

F 125V P,C.

C

25

-29

06810

18 O.

22

1J

F M.C.

R

01

0280221

220

n 1!3W C.R.

28

4A

R

02

0280109

1n 1

/3W

C,R.

28

4A

R

03

0280109

1n

1!3W

CR

.

28

4A

R

04

0280109

In

1!3W C.R .

2A

48

R

05

0280109

1n

1!3W

CR

.

2A

48

R

06

-19

0280569

5.6n 1!3W C.R.

2A.8

4A.

R

20

0280224

220k

n

1!3W

C.R.

2A

48

R

22

0280120

1

2<2

1

!3

W

CR.

28

48

R

23

0280120

12n 1

!3

W C.R.

2A

4A

R

26

0280151

1

50

n

1!3W

C.R.

28

4A

R 27

0280151

150

n 1

!3W

C.R.

2A

48

R

28

0280101

lOOn

1!3W

CR.

28

4A

R 29

0280101

lOon

l!3W

CR

.

2A

48

R

30

.

31

0212150

15n

2W N.

I.R

.

28.2A

4A.48

R 34

0280561

560n

1!3W

C.R.

18

3A

R

35

0280511

510

n

l!3W

C.R

lA

38

R 36

0280224

220k

n

1!3W

C.R.

28

4A

R 37

028022

1

220

n 1

!3

W C.R. 18

3A

R

38

028022

1

220

n 1!3W C.R. l A

38

R

39

0280479

4.

7n

l!3W

C.R.

lA

38

R

40

0280

1

52

1.

5k

fl: 1

/3W

C.A.

18

3A

R

41

0280152

1.5kn 1

!3W

CR

.

lA

38

R

42

0280391

390n

1!3W

C.R.

18

3A

R

43

0280391

390n

l!3W

C.R. l A

38

R

44

0280479

4.7n

1!3W

C.R.

18

3A

R

45

0280479

4.

7n

1!3W

C.R. l A

38

R 46

0210478

0.4

7n

1!2W

N.I.R.

18

3A

R 47

0210478

0.47

n 1

12

W N.I.R.

lA

38

R

48

028010

1

lO

on

1!3W C.R.

R

49

0280221

220

n 1

!3W

C.R.

28

4A

R

50

0280824

820k

n:

l/3W

C.R.

VROl

1033570

1

DOn

B Center l A 38

DC

DV

Adj.

4

AU-Xl

3-3. F-2770 Equalizer Amp L-CH Circuit Board (Stock No.

7551441)

3-4. F-2771 Equalizer Amp R-CH Circuit Board (Stock No.

7551451)

tl'

Conductor Side Parts List

Par

ts

No

. Stock No. Description Position

e

Tr

ansis

tor

F·2770

F·2771

TR01

0306740.

2SC1

845

F. E

2A

48

TR02

0306740

. 2SC1845 F. E

2A

48

TR03

0301090.

2SA992

F.

E

2A

48

TR04

0306360.

2SC1

95

1-1, 2

2A

48

TR05

0306740.

2SC1

845

F. E

28

4A

TR06

0306740

.1

2SC1

845

F. E

18

2A

TR07

0306740.1

2SC1

845

F. E

28

4A

TR08

0306740

. 1 2SC1

845

F,

E

18

3A

T

R09

030

1

090

. 1

2SA992

F. E

2A

48

TR

10

030

1

090

.1

2SA992

F.

E

lA

38

T

R"

030

1

090.1

2SA992

F. E

2A

48

T

R12

030

1

090.1

2SA992

F. E

lA

38

TR13

0300760.2

2SA917·1.2

18

3A

TR14

0306360.

1 2SC1951·1

.2

l A

38

TR15

0306740

. 1

2SC

1

845

F.

E

18

3A

TR 16

030

1

090.1

2SA992

F. E

lA

38

T

R17

0308501.2

2SD357

D.

E

18

3A

TR18

0303331.2

2S8527

D.E

lA

38

-F

ET

FET0

1 0370321 2SK131

L.M

2A

48

-

Di

ode

D

01

03

1

0480

SV03

2A

48

D 02

0310480

SV03

28

4A

D

03 03

1

0480

SV03

18

3A

- Zener

Di

ode

ZD01

03

1

6570

RD33E 8

28

4A

C

01

0622

151 150pF

125

V

P_e.

2A

48

C

02

0623200

20pF

125V

P.C

2A

48

C

03

068

1014 O.047/.lF

400

V

M.C

2A

48

C

05

068

1014 O.

047J,LF

400V

M .C.

28

4A

C

07

0622362

3600pF

125V P.C.

28

4A

C

09

0623300

30pF

125V

PC

18

3A

C

10

0623300

30pF

125V

p.c.

lA

38

C "

068

1014

0

.

047~F

400

V

M.c.

18

3A

C

13

0622102

1

000pF

125V

P.C.

18

3A

C 14

0622102

1

000pF

125V P.

C.

lA

38

C

15

0623200

20pF

12

5V

PC

18

3A

C

16

0623200

2

0pF

125V

p.c.

lA

38

C 19

068

1001 O.47

/.lF

250V

M.C.

28

4A

C

20

068

1001

OA7~F

250V

M.c.

2A

48

C

23

0681001 0.47I-lF

250V

M.C 18

3A

C 24

0622332

3300pF

125V

PC

28

4A

C

25

0682037

0

.

12~F

100V

M.C

2A

48

C

26

0682023

O.

033/J.F

1DOV M .C.

2A,

B

48

C 27

0622202

2000pF

125V

PC

28

4A

R 01

0280563

56kn

1/3W

CR

2A

48

R

02

0280330

33n

1/3W

CR.

2A

48

R

03

0210182

1.8kfl

1/

2W

N .I

.R.

2A

48

R

04

0280333

33kn

1/3W

CR

.

lA

38

R

05

0280564

560kn

1/3W C.R

lA

38

R

06

0280103

10kn

1/3W

CR.

2A

48

R 07

0231182

1.8kn

1I

2W M.R.

28

4A

R

08

0231182

1.

8kn

l!2W

M .R .

28

4A

R 09

0280470

47n 1/3W

CR.

28

4A

R 10

0210102

lkn

1/2W

N.I.R.

28

4A

R

11

0280393

39kn

1/3W

CR.

2A

48

R 12 0280821

820n

1/3W C.R.

18

3A

R 13 0280101

lOOn

1I3W

CR.

28

4A

R 14 0280821

820n

1/3W

CR.

18

3A

R

15

0280101

lOon

1/3W

CR.

28

4A

R 16 0280101

lOon

1/3W

C.R . 18

3A

R 17

0280

1

51

150n

1/3W

CR.

18

3A

R 18

028015

1

150n

1/3W

CR.

18

3A

R

20

0280330

33n

1

/3W

C.R. l A

38

R

21

0280

1

51

1

50n

1/3W

CR.

l A

38

R

23

0280151 1

50n

1/3W

CR

. l A

38

R 24

0280

1

01

lOOn

1/3W C R.

2A

48

R

25

0280

101

lOOn

1

/3W

CR

. l A

38

R

26

028082

1

820n

1

/3W

CR

.

2A

48

R 27

0280

101

lOOn

1

/3W

C.R. l A

38

R

28

028082

1

820n

1

/3W

CR.

l A

38

R 29

0280

121 1

20n

1

/3W

CR.

18

3A

R

30

0280393

39kn

1/3W C.

R.

28

4A

R 31 0

28

0393

39kn 1/3W C R.

lA

38

R

32

0

280

121

12

0n

1

/3W

C.

R.

lA

38

R 33

0280

121 1

20n

1

/3W

CR.

lA

38

R 34

028039

1

390n

1/3W

C

.R

.

18

3A

R

35

028039

1

390n

1

/3W

CR.

l A

38

R

36

028033

1

330

n 1/3W

CR.

18

3A

R 37

028

0

33

1

330n

1/3W

C.R.

lA

38

R

38

0280

1

80

1

8n

1/3W

CR.

18

3A

R

39

0280

1

80

1

8n

1/3W

CR.

l A

38

R 40

028056

1

560n

1

/3W

C R.

28

4A

R 41

028

0

104

1

00kn

1

/3W

C

.R

.

28

4A

R

42

0280330

33n

1

/3W

CR

.

2A

48

R

43

028

02

29

2.2n

1/3W

CR

2A

48

R

44

023

1

203

20kn 1

/2W

M.R.

28

4A

R

45

023

1

682

6.a'n

1

/2W

M.R.

28

4A

R

46

0231 182

1.

8W

1/2W M.R.

2A

48

R

47

023

1391

390']

1/2W M

.R

.

2A

48

R 48

028

0

33

0 3

3n

1

/3W

C R. l A

38

VR01 1

033

890

4

700

B Center 28

4A

DC

OV

A

dj

.

5

3-5. F-2819 Flat Amp Circuit

Board

{Stock No. 7562781}

Conductor Side

~

P=art~s~L~is~t~

___________________________

Parts

No

. Stock No.

eTransistor

TR01.02

TR0

3.04

TR05.06

TR07.08

TR

09.10

TRll

. 12

TR

13.14

TR 1

5.16

TR

17.18

_FET

FET01.02

_Diode

0301090

0306740.1

0306740

0301090

. 1

0300760.1

0306360.1

0300760.1

0370361.2

D

01

.02

03

1

6390

D

03

.04

03

16390

D

05.06

0311160

D

07.08

0340150

D

601

.602 0310340

C

01.02

C

07.08

C

09.10

C

13.14

C 15. 16

C

25.26

C

27.28

C

29.30

C

31.32

R

01.02

R

03.04

0623300

0622152

0623100

068

10

14

0623309

0681018

0681001

0681018

0280101

0280823

Description

2SAG92 F. E

2SC1845

F.E

2SC1845

F.E

2SC1845

F.E

2SA992 F. E

2SA917·1. 2

2SC1951 ·1

2SC1951 ·

1.2

2SA917·1. 2

UPA68H L

1.

L2

RD6.2E 8

RD6

.

2E

8

lS

2473D

MV·12

10Dl

30pF

125V

P.C.

1500pF 125V P.

C.

lOpF

125V

P.C

.

0.047~F

400V

M.C.

3pF 125V P.C.

O.2~F

400V

M.C.

O.22~F

400V

M.C

0.47~F

25

0V

M.C.

'

0.22~F

400V

M.C.

l

oon

1/

':N>I

C.A.

82kn

1/3W

CR

.

Position

3.5

2.5

2.4

2.5

2.4

2

.4

3.

5

3.6

2.4

3.5

2.5

1

3.5

2.4

2

.4

2

.4

2.4

6

3.5

Parts

No.

Stock

No

.

R

07.08

R

09.10

A

13.14

R

15.16

R

17

.18

R 19.20

A

21.22

R

23.24

A

25.26

R

27

.28

R 29.

30

R 31. 32

A

33.34

R

35.36

R

37.38

A 39.40

R

41.42

R

43.44

R

45.46

A

47.48

R

49.50

R

51.52

A

53.54

R

55.56

R

57.58

A 59 -62

VR01.02

S 602

604

0280

104

0280823

0280562

0280821

0280222

0280102

0280103

0280470

0280152

0280222

0280331

0280222

0280272

0280681

0280151

0280822

0280820

.

0280

154

0280221

0280824

0280224

1034150

1131810

1190640

3-6. F-2773 Muting Circuit

Board

{Stock No.

7597401}

Conductor Side

r\

L

~

Parts

List

Parts

No.

Stock

No.

Description

Position

Parts

No

.

Stock

No

.

_Transistor R

03

0280101

TROl

0305951 . 2 2SC945 Q. P

18

R 04 0280472

TR02

0305951 , 2 2SC945 Q. P

28

A

05

0212220

TR03

0305951.2

2SC945 Q.P

18

R

06

0212152

TR04

0305951.2

2SC945

Q.p

28

R 07

0280333

TR05

0305

95

1.2

2SC945

Q.P

2A

R

OB

02B0473

TR06

0305951 . 2 2SC945

Q.p

18 R 09 02B0472

TR0

7 0305951 , 2 2SC945 Q. P

18

R 10 0280561

TR08

0305951 . 2 2SC945

Q.P

lA

A

11

0280183

R 12 02B0223

eDiode R

13

0280222

D

01

0310340

10Dl

lA

A

14

0280682

D 02

0311160

lS2473D

18

A 15 02B0223

D

03

0311160

lS2473D

lA

A

16

0280273

A

17

0280222

_Zener Oiode A

18

0280101

ZDOl

0316520 RD24E C

28

A

19

0280221

ZD02

0316290

AD12E 8

2A

A 20 0280471

ZD03

0316520

RD24E C

2A

R

21

0280123

ZD04

0316520

AD24E C

lA

A 22

0280153

R 23 0280101

R

01

0280101

loon

1/':N>I

C.A.

18

A 24 0280472

R 02 0280471

470n

1/3W C.A.

18

R

25

0280101

Description Position

l00kn

1

/':N>I

C.R . 3.6

82kn

1/':N>I

CR.

3.5

5.6kn

1/3W

CR.

3.5

820n

1/3W C.R. 2.5

2.

2kn

1/3W

CR.

3.5

1

kn

1/

':N>I

CR.

3.5

lOkn

1

/':N>I

C.R. 3.5

47n

1/3W C.R. 3.5

47n

1/3W

CR.

3.5

1.5kn

1/':N>I

CR.

3.5

2.2kn

1/

3W

C.R . 3.5

330n

1/3W C.R. 2.5

2.2kn

1/3W

CA.

2.4

2.2kn

1/3W C.R. 2,4

2.

7kn

1/

':N>I

CR

. 3.5

2.7kn

1/

':N>I

C.R.

3.5

680n

1/':N>I

C.R. 2.4

680n

1/3W C.R. 2.4

150n

1/3W

CR.

2.4

8.2kn

1

/':N>I

CR

. 2.4

82n

1/

3W

CR.

2.4

82n

1/3W C.R. 2.4

150kn

1/':N>I

CR.

1.4

220n

1/3W C.R. 1.4

820kn

1/':N>I

CR.

6

220kn

1/

':N>I

CR

.

loon

B

Cente

r

DC

QV

Adj. 3.5

Jump

& Subsonic

Filter Switch

Speak.ers S

wi

tch

(

~

<)

Description Position

lOOn

1/3W

CR.

28

4.7kn

1/':N>I

CA

.

18

22n

2W

N.I.R.

2A

1.5kn

2W

N.

I.R.

18

33kn

l/3W

C.R .

28

47kn

1/3W

CR

. 18

4.7kn

1/3W

CR

.

18

560n

1/3W

CR

.

28

18kn

1/3W C.R . 18

22kn

1/3W C.R

28

2.2kn

1/3W

CR.

18

6.Bkn

1/3W

CA.

2A

22kn

1/

3W

C.A. l A

27kn

1/3W C.R .

2A

2.2kn

1/3W C.A.

lA

lOon

1/

3W

CA.

18

220n

1/3W

CR.

18

470n

1/

3W

CR

.

lA

1

2kn

1/3W

CA

.

2A

15kn

1/3W

CA.

lA

loon

1/

3W

CA

.

4.7kn

1

/':N>I

CA.

lA

lOon

1/':N>I

C.R.

lA

8

J

AU-X1

3-7. F-2775 Driver Amp Circuit

Board

(Stock No. 7572191)

Conductor

Side

1

2

3

Parts

List

Parts

No

. Stock No.

Dncription

Position Parts

No

. Stock No. Oescription Position Parts

No

. Stock

No.

Dea:ription Position

eTransistor C

04

0681013

0.

033.F

400V

M.C

l C R

23

0280121

120n

1/

:]#

C.R. l B

TROl

0306680.1

2SC2071

B.

V

lA

C 07

0681013

0.

033

.F

400V M.C. l C R 24 0280121

120n

1/

3W

C.R .

lB

TR02

0306740.1

2SC1845 F. E

lC

C

09

0623309

3p

F 125V P.C.

2C

R 25

028010

1 lOOn 1/3W C.R .

lB

TR03

0306740

. 1 2SC1845 F. E l C C 10

0623309

3pF

125V P.

C.

2B

R 26 0280101 lOOn 1/

:]#

C.R .

lB

TR04

0306740

. 1 2SC 1845 F. E

lC

C

11

0623109

lpF

125V P.

C.

28

R 27

028082

1

820n

1/

:]#

C.R .

lB

TR05

0306740.1

2SC1845 F . E

lC

C 12

0623109

lpF

125V P.C.

2B

R 28 0280821

820n

1/

:]#

C.R.

lB

TR06

0301090.1

2SA992

F. E

lB

C 13

0622102

1000pF

125V P.C.

28

R 29

0280393

39kn

1/

:]#

C.R .

2C

TR07

0301090

. 1

2SA992

F. E l B C 14

0622102

1000pF

125V P.C.

2B

R

30

0280393

39kn

1/

3W

CR

. 2B

TR0

8

0301090.1

2SA992

F. E l B C 15

0623330

33pF

125V

P.C

. 2C R

31

0280

151

150n

1/

:]#

CR

. 2C

TR09

0301090.1

2SA992 F. E l B C

16

0623330

33p

F 125V

P.C

2B

R

32

02B0472 4.

7kn

1/

:]#

CR

. 2C

TR10

0301030.1

2SA9

39

B.

V

2C

C 18

06

Bl0

13

0.033

.F

400V M

.C

.

2B

R

33

028068

1

680n

1/3W C.R .

28

TRll

0306680

. 1 2SC2071 B. V

2B

C 19

06810

18 0.

22

. F 400V M.C.

lA

R 34

0280

1

51

1

50n

1/

3W

CR.

2A

TR12

0

306740.

1 2SC1845

F.

E 2B C

22

0681018

0.

22

.F

400V

M.C

. l A R 35 02

80560

5

6n

1/

:]#

CR

. 2C

TR 13

0306680.1

2SC2071

B.

V 2C C

29

0622681

680pF

125V P.C.

lC

R

36

028039

1

390n

1/

:]#

C.R.

2C

TR14

0301030.1

2SA939

B. V

2B

C

30

0681014 0.

47.F

400V

M.

C. 3A R 37

028039

1

390

n 1/3W C.R. 28

TR15

03

06860

. 1 2SC2238LB O. Y 2C R

38

0280103

1

0kn

1/

3W

C.R.

TR16

0301020.1

2SA

968LB

O. Y

2B

R

39

021056

1

560n

1/

2W

N.I.R. 2C

TR 101

0306740.1

2SC 1845 F . E 3C R

01

0280104

1

00kn

1/

:]#

C.R.

lB

R

40

0210561

560n

1/

2W

N.I.R. 2B

R 02

02

8068

1

680

n 1/3W C.R . l B R

41

0210470

47

n 1/2W N.I.R. 2C

_FET

R

03

021 2272 2.

7kn

2W

N.I.R . 2C R

42

0210470

47n

1/2W N.I.R. 2B

FETOl 0370251 2SK97

lB

R

04 02

31

392

3

.9kn

1/

2W

C.R.

lC

R

43

02

1

0120

12n

1/

2W

N.I.R. 2A

eDiode

R

05

0231392

3.9kn

1/

2W

C.R.

lC

R

44

02

1

0120

12n

l/2W

N.

I.R. 2A

o

01

0310480

S

V03

lC R 07 0280471

470n

1/3W C.R.

lC

R

45

0280273

27kn

1/3W C.R.

lA

o

02

0310480

SV03

l C R

08

0280470

47n

1/

:]#

C.R.

lA

R

46

0207100

1

0n

7W

N.

I.R

. 3B

o

03

0310480

S

V03

2C R

09

02

80470

47n

1/

:]#

C.R.

lA

R 47

02

1

3392

3.

9kn

:]#

N.I.R.

3A

o

04

0310480

SV03

2B

R 10

0280470

47n

1/

3W

C.R.

lA

R

48

0213392

3.9kn

:]#

N.I.R . 3A

o

05

0310340

1

00

1 2C R

11

0280152

1.5kn

1/3W C.R.

lA

R 101

0280104

100kn

1/3W C.R. 3C

o

06

0310340

1

001

2B R 12

028033

1

330n

1/

3W

CR

.

lB

R 102

0280223

22kn

1/3W C.R . 3C

0 101 0

340150

MV12 3C R 13

0280392

3.9kn

1/3W

CR

. 2A R

103

0280680

68n

1/3W C.R. 3C

0 102 03111

60-

l

S24730

2C

R 14 0280101

lOOn

1/

3W

C

.R

.

lC

R 104

0280393

39kn 1/

:]#

C.R. 3C

0

103

031

0400

lN

34A

2C

R 15 0280101

loon

1/3W C.R .

lB

R 105 0

280222

2.2kn

1

/:]#

C.R. 3C

0 104

03

11

1

60

l

S24730

2C

R 16 0280821

820n

1

/3

W C.R .

lC

R 1

06

0280823

82kn

1

/:]#

C.R. 3C

R 17 0280821

820n

1/

:]#

C.R .

lC

R 107

0280822

8.

2kn

1/

:]#

C.R . 2C

_Zener Oiode R 18 0280101 lOOn 1/3W C.R . l C

ZD

Ol

03171

90

R0

2

7F

IBI

lC

R 19 0280101

loon

1/3W C.R .

lC

V

ROl

10

335

70

100n

B 2.5x2 Ce

nt

er

lA

Z0

02

0316310

RD13E B 2A R

20

0280

121 1

20

n 1/

3W

C.R.

lC

DC

OV

Adj.

C

01

0622101

100pF

125V P.C.

lB

R 21 0280121 1

20n

1/

:]#

C.R.

lC

VR

02

1

033630

l

kn

B 2.5x2

Bias

2B

C

03

062

3220

22p

F 125V P.C.

lB

R 22

0280820

82n

1

/:]#

C.R .

lB

Current Adj.

7

3-8. F-2781 Power Supply & Protector Circuit Board (Stock No.

7503261)

1

3

4

Conductor Side

(

.!V

A

~

~ ~

~

.;.

-I»

,0

66

6r(~

j

«2

I

o

",go

;"'1

'

r-

0

~T

+~

o

-u.

I (J1

'"

'"'

'"

BLACK~I

__

~~

__

~

__

~

B

]

50

V

A

2

50

V

2A

2

5

0~

2A

c

EQ

.4

F0 2

o

Parts List

Parts

No

. Stock No.

-T

rans

istor

TR601

TR602

T

R603

TR604

TR605

TR606

TR607

TR608

-Di

ode

o

01.02

o

03.04

o

05.06

o

07.08

o

09.10

o

11

o 12

o 601

o

602

o 603

o 604

o 605

o

606

o 607

o

608

o 609

o 610

o

611

o 612

o 613

_Zener Oiode

030861 1.

030595

1.

0305951.2

0308611.2

0305951.2

0311700

0311160

0311310

031

1320

0311700

0340150

0311160

03

11160

0311160

0310340

03

1

1700

0310340

Z0601

0316510

Z0602

0316390

_seA

SCR601

C

03.04

C

05.06

C

07

C

08

C

09

C 10

C

11

C 12

C 601

C 608

R

01.02

R

03.04

R 601

R 602

R

603

R 604

R

605

R

606

R 607

R 608

R 609

R

610

R 611

R 612

R

613

R 614

R

615

R

616

R

617

618

R 619

R

620

R 621

RLOl

RL02

01

02

03

04

601

602

603

604

0350020

0606108

0548001

0606108

0280223

0135221

0210829

0210102

0280174

[)280334

0280104

0280393

0280330

0280472

0280183

0280102

0280330

0280473

0280682

0280474

0280104

0280474

0212152

0280121

0159160

1150430

1150360

0432240

0432220

04

32220

043

1320

0433290

Description

2So357

O. E

2SC945

Q.p

2SC945

Q.P

2SC945

Q.

P

2SC945

Q.

P

2S0357

o.E

2SC945

Q.

P

2SC945

Q.

P

R8152

lS24730

1S24730

SS5

SS5R

RB152

MV12

1S24730

lS24730

1524730

1001

R8152

1001

R024E

B

R06.2E

8

2S

F656

0.1"F

250V

M.C

O.ljJF

250V

M,C.

0.1"F

250V

M.G.

0.1 " F

250V

M

.C.

4700"F

25V

E.C

4700"F

25V

E.C

4700jJF

25V

E.C.

4700"F

25V

E.C

0.1"F

250V M.G.

o

lJ..1F

250V

M.C.

22Hl

1/3W C.R

220n

5W

Ce.A.

B.2n

l W

NI.R.

lk!1

1/2W

N.I.R.

470kn

1/3W C.R

330kn

1/3W

CR

100k<1

1/3W

C.R

39kn

1/3W C.R.

33n

1!3W

CR.

4.7kn

1/3W

CR.

18kn

1/3W

CR

.

lkn

1/3W

CR.

33n

1/3W C.R.

33n

1/3W C.R.

47kn

1/3W C.R.

6.8kl!

1/3W

CR.

470kn

1/3W

CR.

100kn

1/3W

CR.

100k<1 1/3W C.R.

470kH

1/3W C.R.

l.5kn

2W

N.I.A.

120n

1/3W

C.R.

3.9n

ZOW

Ce.R.

Relay

AC Fuse

2A

250V

AC

Fuse

2A

250V

AC

Fuse

2A

250V

AC

Fuse

2A

250V

AC

Fuse

1A

250V

AC Fuse

lA

250

V

AC

Fuse lOA

250V

AC

Fuse

SA

lZ5V

AU-X1

Position

4C

4B

3B

2B

3A.1A

3B

3B.2B

3A.2A

2B

lB

4C

3B

3C

2C

2B

3C

4B

1C

4C

4B

3B

3A.1A

2B

lB

2B

1B

lB

lA

4C

1C

3C

4C

4B

3B

38

3B

38

38.C

28

2B

28

3B

28

2C

4B

3C

4B

2C

1C

4C

1C

4A

4A.B

8

AU-X1

3-9.

F-2778

Regurated Power Supply Circuit Board (Stock

No.

7503271)

1

2

<Xl

t--

N

I

u..

Parts List

Parts No.

eTransistor

TR 01.02

TA03. 04

TA0

5.06

TA07

.08

TA09.10

TA11

. 12

TA1

3

.14

TR 15.1 6

TR17.

18

TR H

!,

20

TR2 1, 22

TA23.24

TR25. 26

TR27, 28

TR29 ,

3O

TR3

1. 32

-Oiode

D 0'

.0

2

Stock

No

.

0301090. 1

03

06

740. 1

03

08

611

.2

0303441 . 2

03

06740.1

03

01090.1

0306740. 1

03

0109

0. 1

030

1

090.

1

0306740. 1

03086

11

.2

03034

41

.2

03067

40

. 1

0301090

. 1

0306740. 1

030

1

090

. 1

0340

'20

Description

2SA992 F. E

25C1845 F. E

25D357 D. E

258527 D. E

2SC1845 F. E

25A992 F. E

2SC1845 F. E

25A992 F. E

2SA992 F. E

25C1845 F. E

25D357 D. E

25

85

27 D. E

25C1845 F. E

25A

992 F. E

2

SC1

845 F. E

25A992 F. E

V

D1

2

.2

- - - 8

Position Parts

No

.

Stock

No

. Oescription Positi

on

D 03. 04

0340

120

VD

1212

2F

.2E

2E.2D D 07.

08

0311160 1S2473D 1F.

1E

2F.2E D 09 .10 0340120

VD12

12 2

8.2A

2E

.2

D D

11

.

12

0340120 VD

121

2 2C. D.28

2F

.2E

D

15.16

0311160 1

S2

473D 1C.18

2

E.

F

.2

D D 604 0310340 10D1

2F.2E D 605 0310340 10D1

1F

.1D

1F.

1E

_Zener Diode

2C.2E ZD01 .02 0316510 R

D2

4E 8 I

F.

l 0

2C

.2

8

ZD

03. 04 0316390 RD6.2E 8 le.1 A

2C

.

2A

2C

.

28

C 01. 02

05

87331

33O

~F

80V

E.

C.

2F

.2

D

2C

.

2A

C

03

.04 058

73

31

33

0~F

80V

E.C. 2F.2E

2C.

28

C

05

.

06

0587470

4 7

~F

80V

E

.C

. 1. 2F.1. 2D

l e .1A C 07. 08 0587470

4

7

~

F

80V

E.C l , 2F .l .

20

1

C'8

R

01

.02 0212101

.o

on 2W N.I.R . 2E.2D

R 0

3.0

4 0212101 100n

2W

N.I.

R. 2F.2E

2E.2D R

05

.06 0280333 33

kn

. /

3W

C.R. 2E.2D

Parts

No

. Stock No.

Description

Position

R 07

.08

02803

33 33

kn

1/3W C.R. 2F.

2E

R 09.

10

0191331 330n 1/

4W

F.

R.

2E

.2

D

A

11

.12

01

91

3

31

33

0n

1/

4W

F.A 2F

.2

E

A 1

3.14

0280472

47kn

1/

3W

CA.

1F.1D

A 15.1 6 0280472 4.

7kn

1/

:NV

C.A. 1F

.1

E

A

17

.

18

0280221 22

0n

1/4W

CA.

1F.1

D

A

19.20

02802

21

22

0n

1/4W C.A. 1F.1E

R

21.2

2 0192479 4.

7n

1/

2W

F.R. 1E.1D

R

25.2

6 0280622 6.8

kn

1/

3W

CR.

lE. l 0

R

27.28

0280102 n n 1/

:NV

C

A.

1E.1D

R 2

9.30

0280102

1kn

1/

:NV

C R. 1F.1 E

R

31

.32

0280

103 10

kn

1/

:NV

C.R. 1E.1D

R 33.34 0280822 8.2kn 1/

3W

C.R. 1E.1D

R 35.36 0280181 18

0n

1/

3W

C R. lE. 1D

R 37.38

028018

3 18

kn

1/

:NV

C.R. 1F.l E

R 39. 40

0280

1

83

18

kn

1/

:NV

CR

. 1F.

1E

R

4'

. 42 02.

2120

12n 2W N.I.R.

2C

.2A

R 43. 44

02

.2120 1

2n

2W

N.I.R. 2C.28

R 45.46

028

0682

6.8kn

1/

3W

CR

. 2C.2A

R 47. 48 0280682 6.

8k

n 1I3W

CR.

2C

.

28

• Note: The circuit boards,

F-2820, F-2772, F-2774, F-2776,

F-2777

are

not

supplied as the assembled,

the individual parts

on

the circuit board, however, are provided for orders.

3-10. F-2774 Buffer Amp Circuit Board

Conductor Side

Parts List

Parts No. Stock

No

.

D-=ription

Potition Abbreviations

31- 34

02

80474

470kn

1/

:NV

C.

R.

C C.R.

Carbon

Resistor

E.C_

Electrolytic

Capacitor

R S.

R.

Solid

Resistor

BP.E.C.

Si-Polar

Electrolytic

RL601 1150620 Relay 8 Ce.R.

Cement

Resistor

Capacitor

50kn

A C. D M.R.

Metal

Film

CC.

Ceramic

Capacitor

VA01.02

1000360

Resistor

Mi.C.

Mica

Capacitor

601

1.90640

Power

Amp

Operation 8 F.R.

Fusing

Resistor

O.C.

Oil

Capacitor

Switch N.I.R.

Non-Inflammable

P.C.

Polystyrene

Capacitor

602 1104400 Tape Copy Switch

Resistor

T.C.

Tantalum

Capacitor

M.C.

Mylar

Capacitor

9

Parts List

Parts

No.

Stock

No.

Desc

ri

ption Position

A

49

.50 0280471

470n

1/3W C.A.

28.2A

A

51

.52 0280471

470n

1/3W C.A.

2e.28

A

53.54

0280122

1.2kn

1/3W C.A. l

e.

1A

A

55.56

0280122

1.

2kn

1/3W C.A. 1e

.1

B

A

57.58

0280221

220n

1/3W C.A.

1.2C.1A

A

59:

60

0280221

220n

1/3W C.A. 1e.

18

A 61

.62

0192229

2.2n

1/2W F.A.

18.

1A

R

65.66

0280561

560n

1/3W C.R. 1

e.1A

A

67.68

0280102

1

kn

1/2W

e.A

.

lS.

l A

A

69.70

0280

1

02

1

kn

1/2W C.R. 1e.18

A 71

.72

0280392

3.9kn

1/3W C.A .

lB.1A

A

73.74

0280562

5.

6kn

1/3W C.R.

lS

.l

A

75.76

0280

1

03

1

0kn

1/3W C.A. 18.

1A

R

77.78

0280102

1kn

1/3W C.A . 1

e.18

VA01.02

1

033670

4.7kn

B DC

Volt

Adj.

lE.1D

VA03.04

1

033650

2.2kn

B DC

Volt

Ad

j.

lB.1A

3-13. F-2772 MC,

MM

Mother Circuit

Board

Conductor Side

3-14.

F-~776

Selector Switch Circuit Board

Conductor

Side

3-11. F-2820

Speakers

Relay Circuit

Board

Conductor Side

Parts List

Parts

No

. Stock No. Description

eDiode

D 01

.02

03

1

0340

lOD

1

C 01

.02

0681014

0

.

047~F

400V

M.C.

A

01.02

02

1

2109

1n 2W

N.I.R.

A

03

.

04

0207100

1

0n

7W N.I.A.

L

01

.02

4290370

RF

Coil l",H

AL01

.02

1150410

Relay

3-12. F-2777 MC,

MM

Switch Circuit Board

Conductor Side

SANSU,-

F-

2777

Parts List

Pa

rts

No. Stock No. Description

S 01

11

31830

S

02

11

31820

Se

l

ec

tor Switch

Tape

Pl

ay Switch

Parts List

Parts

No

. Stock No.

S

01

11

31

800

Parts List

Parts No. Stock No.

-Di

ode

D60

1 - 603

03

1

0340

C

60

1

C 602 0504471

0504471

AL601

-604

1150620

Description

MM/MC

Sw

itch

Description

lOD

1

470

~F

35V

EC

.

470

~

F

35V

E.

C.

Relay

AU-X1

Position

2B

1

A.2A

1B.2B

lA.2A

1

B.28

2A.2

B

Positi

on

A.C

C

B

A.B.C

10

I

AU-Xl

4. ADJUSTMENTS

Notes: 1. Level Volume . . . . . . . . . . . . . . Minimum

2. Room Temperature

.. ..

. . . . . . 18°C -28°C

(65° F -

83

°F)

3.

When

replacing

some

parts

or

circuit

board, refer

to

description in REMARKS.

4.

For

this adjustment, run the

unit

for

more than' 3

minutesafter the power

is

switched ON.

4-1. F-2778 Power Supply Voltage

Adjustment

(See

Top

View

on

page 12)

STEP SUBJECT MEASURE ADJUST ADJUST

REMARKS

OUTPUT

FOR

1

For

MC Head Between

GND

&

VR03

-10

.5

V

F·

2

778

AmpL-CH

TP01 F-2778

2 For

MC

Head

Between

GND

&

VR04

-10

.5 V

r--

(TPOl -TP04)

Amp

R-CH TP02 F-2778

ffi

3

For

MM Head Between

GND

& VR01 -

47

.5 V + -

Amp

L-CH TP03 F-2778

~

4 For MM

Head

Between

GND

& VR02

-47.5

V

Amp

R-CH TP04 F-2778 (Cha

ss

Is) •

4-2. F-2775 Driver Circuit

Adjustment

(See

Top

View on page 12)

STEP SUBJECT

1 DC

OV

Adj.

L-CH

2 DC

OV

Adj.

R-CH

3 Bias current

Adj

.

L-CH

.

4 Bias current

Adj.

R-CH

MEASURE

OUTPUT

Spe

aker terminal

Speaker terminal

Between emitters

of

power

transistors, TR701 &

TR70

3

(between T.P Pi

n)

Between emitters

of

power

transistors,

TR702

&

TR704

(between T.P Pin)

ADJUST

VR01

F

-2

77

5

VR01

F-

2

77

5

VR0

2

F

-2

77

5

VR0

2

F-2775

ADJUST FOR

REMARKS

DC

OV

±5

mV

Before

turning

ON power switch,

set

VR01

to

center position.

DC

25

mV

±1

mV

Before

turning

ON power s

witch,

turn

VR0

2

fully

counterclockwise.

This bias current adjustment con-

verts current value

into

voltage

by

Ohm's law.

4-3. F-2917, F-2918

MC

Head

Amp

Adjustment

(See

Top

View

on

page 12)

STEP SUBJECT MEASURE

OUTPUT

ADJUST ADJUST FOR

REMARKS

1 DC

OV

Adj.

Between GND & common VR01

DCOV±5mV

Before turning ON power switch,

set

L-CH F-2917

joint

of

emitter

resi

stors F-29

17

VR01

to

center position.

R41, R47 (TP01)

2 DC

OV

Adj

.

Same

as

above VR01

R-CH F-

291

8

F-

2918

4-4. F-2770, F-2771 Equalizer Circuit

Adjustment

(See

Top

View

on

page 12)

STEP SUBJECT

MEASURt

OUTPUT

ADJUST ADJUST FOR

REMARKS

1

DC

OV

Adj.

Between

GND

& common VR01 DC

OV

±50

mV

Before

ll!rning

ON power switch, set

L-CH F-2770

joint

of

emitter

re

sistors

R38, R39 (TP01) F-2770 VR01

to

center position.

2 DC

OV

Adj.

Same

as

above VR01

R-CH F-2771 F-2771

4-5. F-2819

Flat

Amp

Circuit

Adjustment

(See

Top

View &

Bottom

View

on

page 12)

STEP SUBJECT

MEASURE

OUTPUT

ADJUST ADJUST FOR

REMARKS

1 DC

ov

Adj

. Between

chassis

and

collector VR01

DCOV

±

5mV

Before

turning

ON power switch, set

L-CH connecti

ng

point

TP01

of

F-2819 VR01 &

VR02

to center position.

TR15

&

TR17

(Top View)

2 DC

OV

Adj.

Between

chassis

and

collector

VR02

R-CH connecting

point

TP02

of

TR

16 &

TR

18

(Bottom

View) F-2819

11

5. OTHER PARTS

5-1. Top View

Speaker Terminal

AC

Consent-~

:-·

VR01---

~~~~~~~~~~~~-~~

=_~

VR02----

~~-

~F_

~~~~~

~~

~

VR02------

-+

~~------

~

----~

1

VROl------

-r

--------------~

TP03·

VR01-

-

--l-

VR02--

---r

------------

--J

VR02(F·

2819)-------------------

--"

5-2. Front View

AU-Xl

~-·hround

Terminal

_____

--'-'l~

-

VR01(L·CH)

......r+

-+---VR01(R·CH)

VROl(L·CH)

VR01(R·CH)

TP01(R·CH)

--

-~

+-

-TP01(L·CH)

'-------

-+

-VR04(F·2778)

R01(F·

2819)

"'--l

~~~~!!!'!!!.'!:::"'=="'=~

-'

R03

5-3. Bottom View

R7

4P Terminal

INPUT Tuner/Aux

PRE

OUT

Tape Power AMP

IN

Parts

list

<Top

View, Front View & Bottom View>

Parts No. Stock No.

Description

Parts No.

-Transistor

11

TR701,702

0306890.1

25C2493

D. Y 12

TA703.704

0301200.

25A1068

D. Y 13

TA705.706

0306890.

25C2493 D. Y 14

TA707.708

0301200.

1 25C 1068 D. Y 15

TA709.710

0306890.

25C2493

D. Y 16

TA711.712

0301200.

25A1068 D. Y 17

18.20

C701 -

708

0559851 10000j.lF

BOV

E.C.

19

,21

C709 -712

0681033

1pF 250V M.C. 22

C

713.714

0559850

2200pF

100V E.C. 23

C

715

0659801

O.olpF

150V C.C. 24

A701 -712

0200479

47n

1/2W N.I.R

25

A713

-724

0159130

0.33<1

5W

Ce.A.

26

27

5006810

Bonnet

28

7008150

Front

Panel

Ass'y

29

J

5336600

Sansui Badge

30

0319090

LEO

)5152210

CS

Washer

7106150

Knob

Ass'y

5

1131790

Power

Switch

31

6

536740

Knob.

power

switch.

p

type

7

2430290

Phone Jack

8

1190640

Speakers

Switch

9

5319210

Knob.

speakers

switch.

Y-7

type

32

10

1000360

Left

Level

Volume.

50kn

33

Stock

No.

5319210

1000360

5319210

1190640

.

5319210

1090500

5319200

1131810

5326760

1104400

5319210

1131800

7106150

1131830

5326750

1131820

5326750

5396630

r426420

5426440

5396590

5396570

r426240

5426440

5396580

5059030

5517050

Voltage Selector

Description

Parts

No.

Knob,

level

volume,

Y-7

type

Right

Level

Volume,

50HZ

Knob,level

volume,

Y-7

type

Power

Amp

Operation

Switch

Knob.

power

amp

operation

switch

Volume,50kn

Knob,

volume,

X·7

type

Jump,

subsonic

switch

Knob,

jump

switch

Tape

Copy

Switch

Knob.

tape

copy

switch.

Y-7

type

MM/MC

Switch

Knob

Ass·y.

MM/MC

Switch

Input

Selector

Switch

Knob.

input

selector

switch

Tape Play

Switch

T701

Knob.

tape

play

switch

n02

4P

Guide

Plate

Ass'y

Indicator

Calor

Plate

4P

Guide

Plate

3P

Guide

Plate Ass'y

Indicator

F701

Color

Plate

3P

Guide

Plate

Bottom

Plate

Leg

Fuse

Holder

F701

~

Stock

No.

2450070

2230190

3800490

3910490

2230220

2230230

2200630

2200620

2200650

2200620

2200580

4002960

4002970

2410091

2410830

10432290

0434060

2300060

-4--'°709

Description

AC

Consent

Ground

Terminal

Power

Cord

705

706

702

715

Strain Relief, power cord

1P Speaker

Terminal

(Red)

1P Speaker

Terminal

(Black)

4P

Input

Terminal,

phono

shorting

type

4P

Input

Terminal.

aux/tuner,

shorting

type

4P Tape

Terminal.

non-shorting

type

4P

Power

AMP

IN

Terminal.

shorting

type

4P

PRE

OUT

Terminal.

non-shorting

type

Power

Transformer

Power

Transformer

Voltage

Selector.

Plug

Voltage

Selector.

Socket

5A 125V

AC

100V. 120V

lAC

lOA 250V

AC

220V. 240V Fuse

AC

F

use

Holder

12

-

A B

6. SCHEMATIC DIAGRAM 6-1.

Pre

Amp Section

CD

lUNER

AVX

13

HEAD

AMP

(MC)

___

_

f291i]

-

I

FETol

-o?

2SKI63

~

--

c

VRo

1

cenr

er

DC

DV

)£d

rus

t

AU-X1

E

T~3'

~_I

~--~

m

~

,,

----

2SA992

2SA917

Design and specifications subject to change without notice for improvement.

La

presentation et

,,,

~ifications

sont

susceptibles

d"t'r

modifi4M sans prtavis

par

suites d'ameliorations eventualles.

Anderungtn. die

dim

technischen FOrtschrltt dienen, bleiben \/orbehalten.

T

R/

5

2SCI845

TR17

2SD357(2.3)

TRM

2SA992

S

WITCHES

&;

C

ON

TR

OLS

5t.ltct

or(~

-277

6,

2780)

So/(

b-d)

P/tono}

'

501

(e

-11)

'

h.o

no 2

So,(i

-l

} T

uner

·

So/(

m-p

) A

ux

/run

er

Tape

Pl9

( F- 2776.27

80)

Soz

(a-d)

So

u

rce

·2

S02

(e-

h)

T

ape

I 2

Sozti

-l)

Tape 2 2

MM'MC Selector ( F-

2nn

'"

G'

~

!i:>

~

Sod

a-h

) Plwno 2 of,.,JfM,on-MC

SO!

(c

-d

) Phono I

ofN

.f"', on-MC

Jump{F

-2819)

56oz(

a-d

)

off,

on (-

l4dBl

Subsonic

(F-

2B

I9)

S

6oz(

a.

-h)

ofr,

on

(-

3dB

/16;:;)

Tape Copy ( F-

2774

)

S&o2(

a-d

) I. Aux

/T

uner

7.

Tun

er

3.

off

4. Source

5. S

-

/

~2

6.5-2

- 1

Puwer Amp

Oper

at

ion

(F-2774)

St;QJ{a~d)

I.

Integr

ated

TP

ol

"'

§

'"

&

02

2.

Exter

nal

in.

put

1. WC)

3 Ext

ernal

inpu

t

2.

(DC)

4.

Exterll.al

in

ut

2.

(AC)

F G

TRo3

.

05

.

07

TR

I3

,I5

2SCI845

2SC1951-1

(2)

~

02

H

PREOUT

~

1 .1

R

2

3

4

/3

5

A c o

6-2. Main Amp & Power Supply Section

DRIVER

------------------

IF-2?m--

~

,

~~~~.r=

==

==~n======r~====~

~==

~~;~~,==

~~~

~~==

==

=~~.r:[f==r,J~~======~----~~~--------~

2

=

SC

=

2~4=9=3~N

~

(O

~

Y

~

)

--------

~

=================

\Q

."

rH."

~

TN

70I,70?705}106,7(Jj,7lO '

~

01,".13

J'

~

TR

70J•

104

,707,

7IJ6,711,7!?

2SAI068N(O,Y)

2SC2238

(O,Y)

2SA968(O,YI

RD27F(BI

RDI2E(BI

00',02

SV

~

03

Do3,(J4

SV-03

005.06

100-1

-------------------

.

------------------------~

~?7751

~

-

~====~==~====~============~~~~====~~

__

____

__

____

__

-44+~

,

I

,

I

,

66

SYMBOL

6Ctramic

fi;I Styrol

@

Mylar

(B.

P1Bi

-PoII1TEl.tctrogtic

ElNon.

-

lnf/.Q~

Res

istor

•

~bJlFil1flk3istor

o

~m..ld

Rt3i.stor

III Fu..sing

Resistor

R.ESISTORS

Arrin

oizms,!3Watts,

1:

5%Tolerance

Unless other wise Notld.

K:k.f2

,M:M

l).

CAPACITORS

Are

in

pF,

Unuss

oterwise

Note

d,

P:pF

at

no

input

signal

TOLEliANCE

G;±Z,,",F:±I%

SWITCHES

Selector

[L

Phonc

I

F-2780

2.

Phono 2

lSola_pl

3.

Tu.ner

4.

Aux

7apePlay

[1.

Sou.rce

F

-27

80 1.

Ta.pe

-I

tsozCl-41

3.

To.pe

- 2

5peai<.ITS

[1.

off

F-2B

I.9

2. A

t~,*a,h)

3. 8

4.

A+8

~:::,b)

[!",

off

SPEAKERS

~

PIIONES

!

!.9OJ#W4JSO!iWlADJ

&th

channlll

OrivM

at

1kHz

-Xl AU-Xl

o.ign

and

specifications subject

to

changt without notice for improvement.

la

presentation

et

In

spk

ifications sont susceptibles d'.ter modifijes sans pr'avis

par

suites d'amilioration. Mntuel'

...

Anderungen. die

$m

technischen Fortschritt dienen, bl'iben vorbehalten.

F G

P

OWER

SUPPLY

:J:

O.22~

JAPAN Modq[

VI

,

27

Nu

01

~

,

~

~,

:G

~

:

,

,g

,

~

I

05

, ,

!&

,

iii

,

, ,

L_ _

...I

03

I

'Z

1:1

N",

, ,

I

..

t I

:J

_:

, ,

' ,

06

H

2SA917 2SA968

2SA992 2SC2238

2SC945 2S8527

cl

2SC1845 2SD357

2SC1951

~

1

ir

' '

.PA68HL

, M

~

2SJ44

2SK163

~

2SA1068N

2SC2493N

c~

2SK131

2SA939

2SC2071

I 2SK97

~

SI

D2G2S2

'c,

2

lN34A

lS2473D

RD6.2E

~+

RD12E

RD24E

RD33E

RD27E

f~

MV12

MV103

lOD

1

VD1212

~f

?f

2SF656

li

SV03

~m

3

~

RB152

ffiT

. rftl

~rfil

4

5

'14

7. REPLACEMENT

OF

MAIN

PARTS (See Vottom View

on

page 12)

1) Replacement

of

Driver circuit board, F-277S.

* Remove

bottom

plate.

* Remove 3p

connector,

A.

* Disconnect +side

of

speaker

cord,

point

B.

* Disconnect

earth

wires (two pieces

of

black wires).

* Loosen 4 screws fixing heat sink,

then

pull

out

the

heat sink.

2) Replacement

of

Power transistor.

* Pull

out

the

heat

sink

by

the

same procedure

of

driver circuit

board replacement above.

* Loosen

the

screws

mounting

the

power transistor and pluck

out

the

transistor.

3) Replacement

of

Front panel Ass'y.

* Remove

bonnet.

* Loosen 4 screws fixi

ng

front

panel from

both

side.

* Remove knobs.

* Loosen a screw

under

the

volume

knob

and take

off

a

nut

fixing

speaker switch.

4) Replacement

of

flat amp & Tape copy switch circuit

board, F-2819, F-2774.

* Remove

front

panel ass'y &

bonnet.

* Loosen 4 screws fixing back panel

to

chassis, and pull

out

the

back panel.

5) Replacement

of

speaker terminal board, F-2820 and pro-

tector relay.

* Remove

bottom

plate &

bonnet.

* Loosen 8 screws fixing Rear panel

to

chassis.

* Take

off

8

of

speaker terminal and remove speaker terminal cir·

cuit board from Rear panel.

* Replace the

protector

relay.

15

AU-X1

8. PACKING LIST

Parts No.

Stock

No. Description

1 9116800 Vinyl Cover

2 9028310

Styrofoam

Packing

3 9019520 Packing

4 9001570 Carton Case

5 5996080 Curl

Stopper

9. ACCESSORY PARTS LIST

Stock

No.

9203920

9238000

Description.

Operating Instructions

Schematic Diagram

AU-X1

MEMO

SANSUI ELECTRONICS CORPORATION: 1250 Valley Brook Ave. Lyndhurst, N.J. 07071 U.S.A.

333

West

Alondra Blvd. Gardena, California 90247 U.S.A.

3036 Koapaka SI.

Honolulu,

Hawaii 96819 U.S.A.

SANSUI

AUDIO

EUROPE

N.V.:

North

Trade Bldg (9th

floor)

Noorderlaan 133·Bus 1,2030 Antwerp, Belgium

SNASUI

AUDIO

EUROPE S.A.: Arabella center, 6 Frankfurt

AM

Main, Lyoner

Strasse

44·48,

West

Germany

SANSUI ELECTRIC COMPANY

LTD.:

14·1, Izumi 2-chome, Suginamiku,

Tokyo

168

Japan

PHONE: (03) 323·1111

{TELEX:

232·2076

·SM118 Printed in Japan (297230M)

...

Sansui AU-X1 User manual

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