Technics Su-7700 - schematics User manual

ORDER

NO.

SD7

702-1196

Service

Manual

Stereo

Integrated

Amplifier

SU-7700

(XA),

(XAL),

(XG),

(XGH),

(XSD),

(XSW),

(XE),

(XGF)

The

model

SU-7700

[XA]

is

available

in

Asia,

Latin

America,

Middle

East

and

Africa.

The

model

SU-7700

[XAL]

is

available

in

Australia

only.

The

model

SU-7700

[XG]

is

available

in

European

only.

The

model

SU-7700

[XGH]

is

available

in

Holland

only.

The

model

SU-7700

[XSD]

is

available

in

Scandinavia

only.

The

model

SU-7700

[XSW]

is

available

in

Switzerland

only.

The

model

SU-7700

[XE]

is

available

in

England

only.

The

cabinet

color

and

design

shall

be

subject

to

change

dependent

The

model

SU-7700

[XGF]

is

available

in

France

only.

on

the

destination

TECHNICAL

SPECI

FICATIONS

(

VFI

F)

Specifications

are

subject

to

change

without

notice

for

further

improvement.

AMPLIFIER

SECTION

Frequency

response:

PHONO

RIAA

standard

curve

t0.2dB

1k

Hz

continuous

power:

both

channels

driven

7OW

+

70W

(412)

TUNER,

AUX

5Hz

~

80kHz,

Pode

Cr

ee

|

BASS

Sree

as

eae

20Hz

~

20kHz

continuous

power:

one

controls:

90Hz,

+12dB

~

—12dB

both

channels

driven

60W

+

6O0W

(41)

TREBLE

20kHz,

+120dB

~

—12dB

SOW

+

50W

(8Q)

Equalizer

subsonic

filter:

30Hz,

~12dB/oct.

Power

bandwidth

(both

channels

driven

at

8():3Hz

~55kHz,

—3dB

“Nigh

filter:

8kHz,

—6dB/oct.

Total

harmonic

distortion:

0.08%

at

rated

power

(20Hz

~20kHz)

Loudness

control

(volume

at

~30dB):

100Hz,

+8dB

0.035%

at

half

power

(20Hz

~20kHz)

Output

voltage

and

impedance:

0.01%

at

half

power

(1kHz)

REC

OUT

(TAPE

1,

2)

150mV/1.2kQ

intermodulation

distortion:

0.08%

(60Hz

:

7

kHz

=

4:

1,

SMPTE)

REC/PLAY

(TAPE

1)

output

30mV/82k!)

Residual

hum

and

noise:

06m\y

Load

impedance:

MAIN

or

REMOTE

4~160

Damping

factor:

25

(4),

50

(8)

MAIN

+

REMOTE

8

~160

Input

sensitivity

and

impedance:

PHONO

2.5mvV/47kQ

GENERAL

TUNER,

AUX

150mV/47kQ

Power

consumption:

45

OW

PLAYBACK

(TAPE

1)

180mMV/47k2

Power

supply

(50Hz/60Hz):

110V/1

20V/220V/240V

PLAYBACK

(TAPE

2)

150mV/47k.)

240V

only

(Set

for

Australia)

REC/PLAY

(TAPE

1)

input

180mV/47kQ

Dimensions

(W

x

H

x

D):

410

x

139

x

334mm

PHONO

maximum

input

voltage

(1kHz,

RMS):

150mV

(16-5/32''x5-15/32"'

x

13-5/32"")

Signal

to

noise

ratio

(IHF,

A):

PHONO

78dB

~~

Weight:

9.7kg

(21.4

|b)

TUNER,

AUX

97dB

TECHNISCHE

DATEN

(DIN

A5

500)

Spezifikationen

konnen

infolge

von

Verbesserungen

ohne

Ankundigung

geandert

werden.

VERSTARKERTEIL

Fremdspannungsabstard:

RMS-Dauertonleistung

bei

1kz:

Nennleistung

PHONO

63dB

beide

Kanale

zusammen

ausgesteuert

2x

7OW

(4)

;

TUNER,

AUX

83dB

2

x

BBW

(8Q)

—26dB

Nennausgangsleistung

PHONO

55dB

RMS-Dauertonleistung

bei

20Hz

~

20kHz:

TNUER,

AUX

08dB

beide

Kanale

zusammen

ausgesteuert

2

x

BOW

(4)

SOmW

Ausgangsleistung

PHONO,

TUNER,

AUX

53dB

2

x

50W

(8Q)

Frequenzgang:

5Hz

~

80kHz,

+OdB,

~3SdB

RMS-Dauertonleistung

bei

40Hz

~

16kHz:

3

1OH2

~

40kHzZ,

+OdB,

—1dB

beide

Kanale

zusammen

ausgesteuert

2x

60W

(4Q)

Klangregler:

BASSE

(BASS)

SOHz,

+12dB

bis

—12dB

2x

5OW

(89)

HOHEN

(TREBLE)

2OKHz.

+

12dB

bis

=120d68

Leistungsbandbreite

(beide

Kanale

zusammen

Entzerrungs

Unterschalifilter:

30Hz,

—12dB/oct.

ausgesteurt

bei

4()):

8Hz

~55kHz,

-3dB

-

Hohenfilter

(HIGH):

|

:

8kHz,

—6dB/oct.

Harmonische

Verzerrungen:

Gehorrichtige

Lautstarke

(Lautstarke

—30dB):

100Hz,

+8dB

Nennausgangsleistung

bei

1kHz,

40

0.08%

Ausgangsspannungen:

REC

OUT

(TAPE

1,

2)

150mV/1,2kQ

Nennausgangsleistung

bei

40Hz

~

16,000Hz,

4°)

0,08%

.

REC/PLAY

(TAPE

1)

Aufnahme

30mV/82k12

—26dB

Nennausgangsleistung

bei

1kHz,

40

0,1%

Kopfhérerpegel

&

Ausgangsimpedanz:

400mvV/33022

5OmW

Ausgangsleistung

bei

1kHz,

41

0.15%

Ausgangsimpedanz:

MAIN

oder

REMOTE

4~16

Intermodulationsverzerrung:

MAIN

und

REMOTE

8~162

Nennausgangsleistung

bei

250Hz

:

8,000Hz=4:1,42

0,08%

Kanaltrennung:

+1,5d8

Hum

&

noise:

0,6mV

Kanalabweichung:

90dB

Dampfungsfaktor:

25

(40),

50

(822)

Eingangsempfindlichkeit

&

Impedanz:

ALLGEMEINE

DATEN

PHONO

2,

5mV/47k

Leistungsaufnahme:

A50W

TUNER,

AUX

150mV/47kQ

~~

Netzspannung

(50Hz/60Hz):

110V/120V/220V/240V

PLAYBACK

(TAPE

1)

180mMV/47kQ)

Abmessungen

(B

x

H

x

T):

410

x

139

x

334

mm

PLAYBACK

(TAPE

2)

15O0mV/47kQ

Gewicht:

9,7kg

REC/PLAY

(TAPE

1)Eing.

180mMV/47k2

PHONO

Maximale

Eingangsspannungen

(1kHz,

RMS)

150mV

Pan

7

Matsushita

Electric

Trading

Co.,

Ltd.

Technics

PO.

Box

288,

Central

Osaka

Japan

CARACTERISTIQUES

TECHNIQUES

(!HF)

Sujet

a

changement

sans

préaris.

PARTIE

AMPLIFICATEUR

1kHz,

puissance

continue:

total

2

canaux

7OW

+

7OW

(41)

53W

+

53W

(81)

20Hz

~

20kKHz,

puissance

continue:

total

2

canaux

6OW

+

BOW

(41)

.

50W

+

50W

(82)

Largeur

de

bande

de

puissance:

total

2

canaux

8)

8Hz

~55

kHz,

—3dB

Distorsion

harmonique

totale:

a

la

puissance

nominate

(2OHz

~

20kHz)

0.08%

a

demi-puissance

(20HzZ

~

20kHz)

0.035%

a

demi-puissance

(1kHz)

0.01%

Distorsion

par

intermodulation:

0.08%

(60HzZ

:

7

kHz

=4:

1,SMPTE)

O.6mV

25

(49),

50

(89)

Tension

résiduelle

de

bruit:

Facteur

damortissement:

Sensibilité

et

impédance

d’entrée:

PHONO

TUNER,

AUX

Magnétophone

2.

LECTURE

Magnétophone

1.

REC/PLAY

Tension

max.

d’entree

PHONO

(1kHz,

eff.):

2.5mV/47kQ

150mV/47kQ

180mV/47kQ

150mV/47kQ

180mV/47kQ

150mV

1.

LECTURE

m

LOCATION

OF

CONTROLS

LOUDNESS

RIGHT

TRE

LErh

PHONES

JACK—

POWER——

7

a4

spcaers[

Mal

a

Ts

:

ee

REMOTE

|

METER

RANGE

SELECTOR—

J

HIGH

FILTER

TAPE

AUX

INPUT

TAPE

1

_

Bee

VOLTAGE

SELECTOR

SWITCH

TUNER

INPUT

see

PHONO

INPUT

MAIN

SPEAKER

---REMOTE

SPEAKER

TAPE

DECK

1

TAPE

DECK

2

BLE

BASS

|

BALANCE

i

(SWITCHED)

(UNSWITCHED)

PHONO

TUNER,

AUX

PHONO

TUNER,

AUX

Rapport

S/B

(IHF,

A):

78dB

97dB

norme

RIAA

+0.2dB

5Hz

~

80kHz

+0dB,

—3SdB

20Hz

~

20kHz,

+0.

5aB

Grave

(BASS)

50Hz4+12dB

a—-12qdB

Aigu

(TREBLE)

20kHz,+12dB

a

—-12qB

Filtrage

intra

acousdique

compensateur:

30Hz,

—12dB/oct.

Filtre

Aigu

(HIGH):

8kHz,

—6dB/oct.

Correction

physiologique

(Volume

a

—30dB)

100Hz,+8dB

Tension

de

sortie:

Magnetophone

1,2,

Enregistrement

150mV/1.2kQ

REC/PLAY

30mV/82kQ

4a16Q

8a16Q

Courbe

de

réponse:

Commandes

de

tonalite:

Magnétophone

1,

Impédance

de

charge:

PRINCIPAL

ou

ELOIGNE

PRINCIPAL

+

ELOIGNE

GENERALITES

Consommation:

Alimentation

(50Hz/60Hz):

Dimensions

(L

x

H

x

P):

Poids:

450W

110V/120V/220V/240V

410

x

139

x

334mm

9.7kg

VOLUME

EQUALIZER

SUBSONIC

FILTER

AUX

—TUNER-INPUT

SELECTOR

PHONO

JAC

OUTLETS

@

This

photo

shows

only

the

products

for

[XA].

@®

The

products

for

other

destinations

except

[XA]

are

equipped

with

AC

outlet.

e

For

further

remark,

the

products

for

[XAL]

are

not

provided

with

voltage

selector

and

AC

outlet.

NOTE:

POWER

gare:

The

unit

is

provided

with

the

speaker

TRANSFORMER

circuit

protection

fuses

at

the

right

and

left

channels

respectively.

POWER

FUSES

The

fuse

is

to

prevent

the

power

tran-

sistor

from

destruction,

should

the

MUTING/

speaker

terminals

be

short-circuited.

PROTECTION

RELAY

EQUALIZER

Accordingly,

if

the

unit

fails

to

function

upon

completion

of

the

speaker

con-

nections,

check

the

speaker

protection

fuses

first

of

all

for

possible

blowing.

CIRCUIT

[2]

SU-7700

10,000uF

(

x

2)

PROTECTION:

FUSES

m=

TO

REMOVE

CABINET

_

2

Cabinet

1.

Remove

four

(4)

cabinet-mounting

screws,

nos.@)

wb

~

@

as

shown

in

fig.

1.

2.

Remove

cabinet

from

chassis

in

arrow

direction

1

to

2,

as

shown

in

fig.

1.

ZS

3.

To

reassemble,

reverse

above

procedure.

:

m@

TO

REMOVE

CHASSIS

1.

Remove

cabinet

from

chassis.

(Refer

to

‘“To

remove

cabinet’’).

2.

Remove

lead

wire

from

lead

clamps.

(Refer

to

Fig:

7).

ss

3.

Remove

two

(2)

electrolytic

capacitor

-

bracket-

5

mounting

screws.

(Refer

to

Fig.

2:

2

and@)).

4.

Remove

bracket

of

electrolytic

capacitors.

LEAD

CLAMP

5

circuit

board-

metal

clamp.

LEAD

CLAMP

Fig.

2

6.

Remove

two

(2)

printed

circuit

board-

mounting

screws.

(Refer

to

Fig.

2:

4)

and

©)

)

7.

Remove

four

(4)

panel-mounting

screws.

(Refer

to

Fig.

2:@and@,

left

and

right

side.)

8.

As

photo

in

Fig.

3,

hold

the

panel

at

its

side

ends

abd

push

it

downward

tilting

sligntly

its

top

part

to

the

frontward

direction.

9.

Remove

the

front

panel

from

the

chassis.

(Fig.

4

to

Fig.

5).

10.

Set

the

printed

circuit

board

on

the

chassis

as

indi-

cated

in

Fig.

6.

11.

The

front

panel

can

be

reset

in

the

reverse

sequence.

12.

Mount

the

lever

switch

bracket

inside

the

chassis

prior

to

resetting

the

front

panel.

(Fig.

6)

Fig.

3

Lever

\_Switch

Bracket

®

CHASSIS

;

®

RIGHT

SIDE

Fig.

4

Fig.

5

Fig.

6

SU-7700

[3)

m@

ALIGNMENT

INSTRUCTIONS

e

When

the

power

transistor

is

replaced,

be

sure

to

apply

silicone

compound

(or

equivalent

thermal

diffusion

agent)

onto

GC)

the

mica

plate,

and

at

the

same

time

confirm

the

idling

current

of

the

power

transistor.

(measure

voltage

across

the

emitter

resistance)

@®

For

adjustment

with

DC

voltmeter

1.

Turn

the

speaker

switch

“OFF”.

2.

Connect

the

DC

voltmeter

as

in

Fig.

7

of

the

adjusting

spot

diagram.

3.

If

the

reading

is

under

25mV

approximately

several

minutes

after

turning

ON

the

power

supply,

the

circuit

is

“OK”.

On

the

other

hand,

if

the

reading

is

over

25mV,

cut

off

the

lead

wire

for

L

in

the

case

of

left

channel

(The

lead

wire

for

R

in

the

case

of

right

channel).

/

4.

Should

the

reading

not

fall

under

25mV

even

when

the

lead

wire

has

been

cut

off,

there

is

something

wrong

with

the

circuit,

and

therefore,

check

the

power

source

Circuit

or

main

amplifier

circuit.

NOTE:

When

cutting

off

the

lead

wire,

cut

off

the

same

at

the

root.

(8.

Current

should

be

checked

only

when

adjustment

is

made

with

a

tester.

(measuring

instrument

incapable

of

measur-

ing

voltage

in

mV

unit}.

|

_

Turn

OFF

the

power

supply

for

the

set.

A

_

Connect

the

ammeter

as

shown

in

Fig.

9.

_

After

ensuring

that

the

ammeter

will

not

come

off,

turn

ON

the

power

supply.

_|f

the

reading

is

under

75mA

after

servera!l

minutes

(But,

when

nothing

resistance

of

internal

resistor

by

ammeter)

the

circuit

is

“OK.

!f

over

75mA,

cut

off

the

lead

wire

for

L

in

the

case

of

left

channel

(The

lead

wire

for

R

in

the

case

of

right

channel).

5.

If

the

reading

does

not

fall

under

75mA,

there

is

something

wrong

with

the

circuit.

BON

NOTE:

The

adjustment

may

be

made

either

by

@

or

by

®

method.

(We

recommend

the

method

“@

where

possible}.

Figs.

8

and

9

are

the

case

of

left

channel.

|

es

|

ene

+B

DC

VOLTMETER

+B

DC

AMMETER

F

€

206

205

207

ee

TP4

204

col]

~T

b

Ee

ee

RELAY

Voltage

check

method

Current

check

method

eee

ee

ae

(Stromspannung-prufmethode)

(Stromstarke-Prifmethode)

F

DC

25mv

DC

25mv

Méthode

de

verification

Méthode

de

vérification

“i

de

tension

de

courant

“Tt

«

s

“ll

Fig.

8

(Abb.

8)

Fig.

9

(Abb.

9)

ag

Fig.

7

(Abb.

7)

m@

ABGLEICHANWEISUNGEN

e

Wenn

der

Netztransistor

ersetzt

wird,

ist

zu

beachten,

da

eine

Siliziumverbindung

(

oder

ahnliches

Thermodiffusions-

mittel)

auf

die

Glimmerplatte

gegeben

wird,

und

zur

gleichen

Zeit

der

Blindstrom

des

Netztransistors

festgestellt

wird..

(

Die

Spannung

Uber

den

Emitterwiderstand

messen.)

A’

Zum

Justieren

mit

dem

Gleichstrom-Voltmeter

1.

Drehen

Sie

den

Lautsprecherschalter

auf

“OFF”.

2.

SchlieRen

Sie

den

Gleichstrom-Voltmeter

an,

wie

in

Abb.

7

des

Justrerounkte-Diagramms

gezeigt.

3.

Falls

die

weniger

als

ca.

25

mV

betragt,

so

ist

die

Schaltung

in

Ordnung.

Falls

aber

die

mehr

als

25

mV

betragt,

sehneiden

Sie

den

Leitungsdraht

fir

L

im

Palle

des

linken

Kanals

weg

(

oder

den

Leitungsdraht

flr

R

im

Falle

des

rechten

Kanals)

.

4.

Falls

die

auch

nach

Unterbrechen

des

Leitungsdrahtes

nicht

unter

25

mV

fallt,

so

ist

die

Schaltung

nicht

tn

Ordnung,

und

die

Stromquellenschaltung

und

die

Hauptverstarkerschaltung

mussen

Uberpruft

werden.

ANMERKUNG:

Falls

das

Wegschneiden

des

Leitungsdrahtes

notig

ist,

schneiden

Sie

diesen

nahe

am

AnschlufgSpunkt

weg.

[4]

SU-7700

®

Die

Stromstarke

sollte

nur

gepriift

werden,

wenn

die

Justierung

mit

einem

Prifgerat

vorgenommen

wird.

{Mit

dem

MeRinstrument

kann

die

Spannung

nicht

in

mV

gemessen

werden.)

1.

Schalten

Sie

die

Stromzufuhr

zum

Gerat

aus.

2.

SchlieRen

Sie

das

Ammeter

an,

wie

in

Abb.

9

gezeigt.

3.

Nachdom

Sie

sich

vergewissert

haben,

dali

das

Ammeter

solide

befestigt

ist,

schalten

Sie

die

Stromzufuhr

ein.

4.

Falls

die

einige

Minuten

nach

dem

Einschalten

weniger

als

75

mA

betragt,

so

ist

die

Schaltung

in

Ordnung.

lL

jegt

die

Uber

75

mA,

schneiden

Sie

den

Leitungsdraht

fiir

L

im

Falle

des

linken

Kanals

weg.

(oder

den

Leitungsdraht

fur

R

im

Falle

des

rechten

Kanals)

.

\

5.

Falls

die

auch

dann

nicht

unter

75

mA

falit,

so

ist

die

Schaltung

defekt.

ANMERKUNG:

Die

Justierung

kann

entweder

nach

Methode

@)

oder

®

vorgenommen

werden.

(Wo

moglich,

empfehlen

wir

Methode

().

Die

Abbildungen

8

und

9

beziehen

sich

auf

den

linken

kanal.

g@

INSTRUCTIONS

D’ALIGNEMENT

e«

Lorsque

le

transistor

de

puissance

est

remplacé,

s'assurer

d'appliquer

le

composé

de

silicone

(ou

un

agent

de

diffusion

thermique

équivalent)

sur

la

plaque

de

mica

et

confirmer

en

méme

temps

le

courant

déwatté

du

transistor

de

puissance.

(Mesurer

la

tension

a

travers

la

résistance

de

|‘émetteur).

‘’

Pour

la

mise

au

point

avec

un

voltmétre

C.C.

1.

Tourner

le

commutateur

de

haut-parleur

sur

“OFF”.

2.

Connecter

le

voltmétre

C.C.

comme

dans

la

Fig.

7

du

schéma

des

endroits

de

verification.

3. Si

la

lecture

est

approximativement

inférieure

4

25

mV

plusieurs

minutes

aprés

la

mise

en

marche

de

|‘alimentation,

le

circuit

fonctionne

correctement.

Par

contre,

si

la

lecture

est

au-dela

de

25

mV,

couper

le

fil

de

jonction

pour

L

dans

le

cas

du

canal

Gauche

[L],

(le

fil

de

jonction

pour

R,

dans

le

cas

du

canal

Droite

[R].

4.

Si

la

lecture

ne

descends

pas

au-dessous

de

25

mV

méme

lorsque

le

fil

de

jonction

a

été

coupé,

cela

signifie

qu

il

y

a

quelque

chose

d‘incorrect

dans

le

circuit

et

par

conséquent,

il

sera

nécessaire

de

vérifier

le

circuit

d'alimentation

ou

le

circutt

d‘amplification

principal.

REMARQUE:

Lorsqu‘on

coupe

le

fil

de

jonction,

le

couper

a

l‘extrémité

de

sa

racine.

B’

Le

courant

ne

devra

étre

vérifié

seulement

que

lorsque

la

mise

au

point

est

faite

avec

un

appareil

contrdéleur.

(Appareil

de

mesure

incapable

d'une

tension

de

mesure

dans

un

appareillage

de

mV).

‘

1.

Couper

l’alimentation

de

l'appareillage.

2.

Brancher

l'ampéremétre,

comme

il

est

montré

a

la

Fig.

9.

3.

Aprés

s'étre

assuré

que

l‘ampéremétre

n'est

pas

débranché,

mettre

en

marche

|'alimentation.

4.

Si

la

lecture

est

inférieure

4

75

mA

aprés

plusieurs

minutes,

le

circuit

fonctionne

correctement.

Si

par

contre

la

lec-

ture

va

au-dela

de

75

mA,

couper

le

fil

de

jonction

pour

L

dans

le

cas

du

canal

Gauche

[L]

,

(le

fil

de

jonction

pour

R

dans

le

cas

du

canal

Droite

[R]).

5.

Si

la

lecture

ne

descends

pas

au-dessous

de

75

mA,

cela

signifie

qu'il

y

a

quelque

chose

de

défectueux

dans

le

circuit.

a

REMARQUE:

La

mise

au

point

doit

étre

faite

soit

avec

la

méthode

‘A’,

soit

avec

la

méthode

®.

(Si

c'est

possible,

nous

recommandons

la

méthode

(A).

Les

Figures

8

et

9se

serisnt

au

cas

du

canal

Caiche

ae

@-iiie

oat

esis

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<>

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RANGE)

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|

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|

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1

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ee

ens

rr

B

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|

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3

|

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ea

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MODE)

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CHANNEL

SU-7700

[5]

Schematic

Diagram......

Model

SU-7700

|

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3

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SUP

10392A

TR201.202

TR219,220

TR205,206

TR209,210

TR211,212

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|

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25C1328

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=

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|

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:

|

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7

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|

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|

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|

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ais

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680

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2

|

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TAPE

2

|

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REC

2

|

TR303,304

2SA564A

D401~

404

TR301,302

RVDSR3AM-2N

0301

2SA564

RECT

MA150

ae

LT

RELAY

DRIVE

Notes:

1.

S1~S3_:

Input

selector

switch

in

‘-PHONO"”

push

position.

S1...(PHONO)

S2...(TUNER)

S3...(AUX)

2.

S4:

Equalizer

subsonic

filter

switch

in

‘'ON”’

position.

3.

$5:

Tape

monitor

switch

in

“SOURCE”

position.

E

TAPE

|

(2)

(TAPE

1)

++)

(SOURCE)

«+

@

(TAPE

2)

4.

$6:

Recording

mode

switch

in

“SOURCE”

position.

REC/

PLAY

(2)

(TAPE

1

®

2)«—+@)

(SOURCE)++@

(TAPE

2

&

1)

5.

S7:

Mode

switch

in

“STEREO”

position.

6.

S8:

High

filter

switch

in

‘‘OFF”

position

7.

SQ:

Loudness

switch

in

‘‘OFF”

position.

8.

S10:

Main

speakers

switch

in

‘‘'ON”

position.

[6]

SU-7700

10.

11.

12.

io:

14.

S11:

Remote

speakers

switch

in

‘‘ON”

position.

S12:

Meter

range

selector

switch

in

‘‘X1"'

position

(X

1«—»

X0.1)

S13:

Power

switch

in

‘‘OFF’’

position.

$14-1,$14-2:

Voltage

selector

switch

in

‘‘110V”

position.

@

(110V)

++

@)

(120V)

«++

G)

(220V)

++

@

(240V)

[J

Indicated

voltage

values

are

the

standard

values

for

the

unit

measured

by

the

DC

electronic

circuit

tester

(high

impedance)

with

the

chassis

taken

as

standard.

Therefore,

there

may

exist

some

errors

in

the

voltage

values,

depending

on

the

internal

impedance

of

the

DC

circuit

tester.

This

schematic

diagram

may

be

modified

at

any

time

with

the

develo-

pment

of

new

technology.

LEFT

CHANNEL

RIGHT

CHANNEL

SUP9850B

@

SCHEMATI

e

only

set

for

[XGF],

[x

AC

LINE

110/120/220/240V

r—

m

TR.

&

1.C.

TE

SU-7700

=

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CIRCUIT

BOARD

—

i =

Guts

Gu

CE

—

ee

ere

ee

SS

S|

SS

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eee

ee

ae

eee

a

TR201.202

TR219,220

TR205,206

TR209,210

TR211,212

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a

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25C

1885

2SC1567

2SA794

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|

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x

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TR612,614

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SVDMZ314

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2w

680

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404

TR301,302

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one

(RIGHT

)

SUP

10392D

TR303,304

2SA56

2SA564A

RECT

Q

MUTING/PROTECTION

RELAY

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Notes:

1.

S1~S3_:

Input

selector

switch

in

‘'PHONO"”

push

position.

S1...(PHONO)

S2...(TUNER)

S3...(AUX)

2.

S4:

Equalizer

subsonic

filter

switch

in

‘'ON”

position.

|

3.

S5:

Tape

monitor

switch

in

“SOURCE”

position.

(2)

(TAPE

1)

++(@)

(SOURCE)

++

@

(TAPE

2)

4.

S6:

Recording

mode

switch

in

‘‘SOURCE”

position.

(2)

(TAPE

1

®

2)«+@

(SOURCE)++@

(TAPE

2

»

1)

5.

S7:

Mode

switch

in

“STEREO”

position.

6.

S8:

High

filter

switch

in

“OFF”

position

7.

SQ:

Loudness

switch

in

‘‘OFF”’

position.

8.

S10:

Main

speakers

switch

in

‘‘ON”

position.

SU-7700

10.

11.

12.

14.

S11:

Remote

speakers

switch

in

‘‘ON”

position.

S12:

Meter

range

selector

switch

in

‘‘X1"'

position

(X

1<—

X0.1)

$13:

Power

switch

in

““OFF”

position.

$14-1,S14-2:

Voltage

selector

switch

in

‘‘110V”

position.

@

(110V)

+

@

(120V)

++

@)

(220V)++@

(240Vv)

[—_]Indicated

voltage

values

are

the

standard

values

for

the

unit

measured

by

the

DC

electronic

circuit

tester

(high

impedance)

with

the

chassis

taken

as

standard.

Therefore,

there

may

exist

some

errors

in

the

voltage

values,

depending

on

the

internal

impedance

of

the

DC

circuit

tester.

This

schematic

diagram

may

be

modified

at

any

time

with

the

develo-

pment

of

new

technology.

m@

SCHEMATIC

DIAGRAMS

OF

POWER

SOURCE

e

only

set

for

[XSD],

[XSW],

@

only

set

for

[XAL]

@

only

set

for

[XE]

[XGF],

[XG]

and

[XGH]

————-—--——--—-------4

et

tet

el

nN

ae?

oo

|

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|

BLU

|

Fl

2AT

RED

|

To

voltage

|

To

volt

|

AC

LINE

selector

|

1

AC

LINE

$13

saleetare

]

|

110/120/220/240V

|

110/120/220/240V

aa

|

o—

|

oe

@

TR.

&

1.C.

TERMINAL

GUIDE

m@

BLOCK

DIAGRAM

OF

INTEGRATED

CIRCUIT

1C101,

1C102

(SVITA7136P)

POWER

SUPPLY

2SA564

/

2SA564A

2SC828

/

2SC828A

2SC1885

,

2S5C1328

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|

CURRENT

MIRROR

CIRCUIT

ie Ae

Nera

s

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oe

SU-7700

Printed

Circuit

Board

..

:

METER

RIGHT

VU/POWER

LEFT

SPEAKERS

aan

|

MAIN

METER

LAMP

(43V

025A)

LEFT

CH.

SPEAKER

RIGHT

CH.

SPEAKER

TR303,304

2SA564A

RELAY

DRIVE

....

Model

SU-7700

6

5

VU/POWER

VOLUME

CONTROL

r—-T--1--

BALANCE

CONTROL

SUBSONIC

FILTER

Jf

22.

R2

200K

A

TR220

TR204

,218

TR201,

202

TR203

217

TR219

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2SC828

2SA798A

25C828

2501328

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FOLLOWER

CURRENT

MIRROR

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CURRENT

MIRROR

EMITTER

FOLLOWER

INPUT

SELECTOR

me

i

|

SUE

AIRE

INGE

HI

aces

LOUDNESS

BASS

CONTROL

TREBLE

ONTROL

MODE

REC

MODE

TAPE

MONITOR

eit

Ap

1

S8

|

ISUP

1G39R

A

C102

SVITA7136P

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EQUALIZER

C

D

TR301,302

TR206

2SA564

2SC1885

Sie

swrtgue

PONE

C10

SVITA7136P

EQUALIZER

TR212

2SA794

DRIVE

E

GROUND

TR210

TR209

TR205

TR211

2SC1567

2SC1885

2SA794

DRIVE

PRE

DRIVE

SU-7700

[9]

SU-7700

=

PRINTED

CIRCUIT

BOARD

OF

INPUT

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J4

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‘uoqies)

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‘uoqies)

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‘uoqies

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‘uoqies

‘uoqie’)

‘uoques

‘uoqses)

‘uoques)

“uoques)

‘uoquies)

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‘uoqies

"uoque’)

SYOLSISAY

HHHHHHHHHH

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volrlscau3

volrlscaqua

LZ2riscqua

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voLrLScau3

voLrlscaugs

volriscau3

volrlscau3

p6ErlLS2Qu3s

p6ErLSZOY3

eLbrlscaus

cLvrlscau3

cLbr1scaua

cLbrlscaus

CCEZWOAS

VLEZWOAS

CCVZWOAS

Y-VLVSESc

Y-V88Ed0SC

Y-V8Z289SZ2

y-IV999VSZ

1-8ZELISTZ

O-v6ELVSZ

0-L9SLISZ

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L-82EL9SZ

7D

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JaQuINU

Jed

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ase

SyaquuNnu

Weg

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LSI]

SLUYVd

LNSAWSDV1dSad

&

"ON

"384

sos

ZOZ

‘L071

cGE

‘LGEG

ZOE

‘LOEG

LOcQ

cOLO

LOLQ

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vl9‘ZL9OYL

909

‘S094.

vOE

“EOE

ZOE

“LOEYL

O22

‘61ZYL

CLC

LLCYL

OL?

60CHL

902

‘SOZY1L

B12

‘L417

v0Z

‘COcHL

ZO?

LOCYL

cOL

‘LOLOI

-3JLON

SU-7700

{Et]

ooz¢ns

Ref.

No.

.

Part

No.

ERD25TJ474

ERD25TJ183

-ERGIANJS61

ERD25TJ123

ERD25TJ121

ERD25TJ122

ERG2ANJ152

EWFOMAO24BF5

EVHGSAF25G25

EWF4XA063C

15

EWF3XA063C

15

ECEA50OV1

ECEASOM3R3

ECCD1H181K

ECCD1H680K

ECCD1H221K

ECEA162Z22

ECEA16Z22

ECEA16V47

ECEASOZ3R3

ECEAS0Z3R3

ECKD1H391K

ECQF

1472GZN

ECQF1472GZN

ECQF1183GZN

ECEASOM1R

ECEAS5S0OM1R

ECEA25V100V

ECEA16V330V

ECQM1H392KZ

ECQM1H153KZ

Carbon,

Metal

Film

Carbon,

Metal

Film,

Electrolytic,

Ceramic,

Ceramic

Electrolytic,

Ceramic,

Electrolytic,

Polyester,

ECEAROMTR

ECEASOM1R

ECCD1HO50K

ECCD1HOS50K

Electrolytic,

Ceramic,

CAPACITORS

Polypropylene,

0.018uF,

Polypropylene,

0.018uF,

Part

Name

&

Description

470k,

1/4W,

18kQ,

1/4W,

5600,

1W

12kQ),

12kQ,

1/4W,

1200,

1/4W,

1200,

1/4W,

1.2kQ,

1/4W,

1.2kQ,

1/4W,

1.5kQ),

VARIABLE

RESISTORS

Volume

Control,

250k

(B)

Balance

Control,

200k

9

(G)

Bass

Control,

100k

(C)

Treble

Control,

100k

(C)

1pF,

3.3

uF,

3.3

uF,

180pF,

68pF,

68pF

,

220pF,

22uF,

47

pF,

47

uF,

3.3uF,

390pF,

1uF,

Tur,

100

uF

330uF

,

0.0039

uF

,

0.0039

uF

,

0.015uF,

0.015

uF,

(pr,

TuF,

5pF,

50V

50V,

16V

50V

50V,

5O0V,

Be

es

ee

Fe

H

Polypropylene,

0.0047uF,

125V

,

Polypropylene,

0.0047uF,

125V,

50V

25V

16V

50V,

NOV

50V

50V,

5%

+10%

+

2%

20

+

2%

+

2%

+10%

a

ee

a

ee

—_

—_—t

—_d

-~—

>

Per

set}

C211

C212

C213

C214

C217

C218

C219

C220

C221

C222

C223

C225

C226

C227

C228

C251

C252

C253

C254

C255

C256

C257

C258

C259

C260

C261

C262

C265

C266

C267

C268

C269

C303

C351

C352

C353

C354

C401

C402

-ECKD2H103PE

oo.

“|

ECEAS0Z3R3

ECEA16V33

ECEA25V100V

ECCD1H101K

ECQM1H473KZ

ECEA35V47V

ECEAS50V220V

ECKD1H331K

ECQM1H222KZ

ECQM1H333KZ

ECQM1H154KZ

ECQM1H822KZ

ECQM1H393KZ

ECEA16V33

ECEA10M47

ECKD1H103MD

ECKD2H103PE

ECEA6V220V

ECEAS50V

10

ECEA50V

10

ECEA50V

10

ECEA50V

10

ECET50R

103Y

ECET50R

103Y

Electrolytic,

33uF,

16V

Electrolytic,

33uF,

16V

Electrolytic,

100uF,

25V

Electrolytic,

100uF,

25V

Ceramic,

100pF,

50V,

Ceramic,

100pF,

50V,

Ceramic,

100pF,

50V,

Ceramic,

100pF,

50V,

Polyester,

0.047uF,

SOV,

Polyester,

0.047uF,

5OV,

Part

Name

&

Description

+10%

Per

Set

1

ee

ee ee ee ee

ee)

Electrolytic,

47pF,

35V

Electrolytic,

220uF,

50V

Electrolytic,

220uF,

50V

Electrolytic,

330pF,

50V,

Electrolytic,

330pF,

50V,

Polyester,

0.0022uF,

50V,

Polyester,

0.0022uF,

50V,

Polyester,

0.033uF,

5OV,

Polyester,

0.033uF,

50V,

Polyester,

0.15

uF,

50V,

Polyester,

0.15

pF,

50V,

Polyester,

0.0082uF,

5OV,

Polyester,

0.0082uF,

5O0V,

Polyester,

0.039uF,

50V,

Polyester,

0.039uF,

5O0V,

Electrolytic,

33yF,

16V

Electrolytic,

33yuF,

16V

Electrolytic,

4/7HF,

10V

Electrolytic,

47uF,

10V

Ceramic,

O.01pF,

SOV

Ceramic,

O.0luF,

SOV,

Ceramic,

0.014uF,

500V

Ceramic,

0.014F

ectrolytic,

3.3uF,

Electrolytic,

220uF,

Electrolytic,

10uF,

Electrolytic,

10uF,

Electrolytic,

10F,

Electrolytic,

10uF,

Electrolytic,

10000uF,

SOV

Electrolytic,

10000uF,

SOV

COMPONENT

COMBINATION

PILOT

LAMP

+10%

+20%

Component

Combination,

0.01uF

(X2]}

ss od

ot

od

oe

ie

eae

OOLZ-NS

[ri

m@

EXPLODED

VIEWS

GA

xTB4+

16FFZ

Hes

oes

63)

§

=

SSS

SSO

=

WS

SSO

SS

BAAN

SS

SSS

SSSSEESSSS

WSS

Sass

22)

xTv3+8C

(24)RIVIA

(6DXxWGS5FZ

(63)xWaA4BFz

wee

16FFZ

Q)XTN3+8BFZ

@8)SJF4803-2

Fuse

a

:

ot

(25)XTN3+8B

7

Ee

~

(49)SHR401-1

(26)SJFA5101

|

Ry

XTB3+8BFZ

at

"G

“SS

oo)

OSes

2

GHxWASBFZ

ee

.

ae)

SS

@xtes+

887

>

SJF3009

Q8)Suw1073S

XTB3+8BFZ

30)

SHRA307

SBN631

Available

in

Australia

(XAL)

only

———

AS

88)ssa79

SGX6469

XNS8

i

hPa

eae

eet

(>)

i

XWG3

83)

&—@x1v3+

12¢

1,

:

S

y

ae

|

+

=

|

1»

ee

-

|

G9)sHR131

a

|

a

|

1

2

|

)

|

2

b

——63)xwa3

l

{

XWV8

(6)sGx6471

|

XNS8

SB)

~

:

G4)

xTV3

+

12C

|

sKLArg@——

+

+68

|

SBN627

|

SGPU7700L

|

i

[Sst]

002

4ns

Part

No.

Sil

S3

S4

S5

~

S7

S8,

9

S10

~

S12

OVOAOANAOARWN

>

36

37

[XG,XGH,XGF]

37

[XA]

37

[XE]

Bao

(s<Sso,

«~sw]

37

[XAL]

SSH327S

SSH67S

SSL19

SoL17

SSH325S

SBN627

SBC

163-1

SBD7

SBN631

SBN629

SG

X6471

SG

X6469

XNS8

XWV8

SYW73

SHR9267

XTB3+8B

SSM95

SHR589

SHR583-1

XYN3+C6S

SUW1067

XTB3+8B

SDH399

SMM9-4

XTV3+8C

SUW1081S

RJIVIA

XTN3+8B

SJFA5101

SMK5

SUW1073S

XCJ6P11B-A

SHRA307

XTB3+6B

|

SKLA7-1

XWG3

XTV3+12C

SJF

3009

XTB3+8BFZ

SGP670B

SGP670-1B

SGP670-2B

Saorvrroeoe

SGPU7700L

Part

Name

&

Description

Per

Set

SWITCHES

Switch,

Input

Selector

Switch,

Equalizer

Subsonic

Switch,

Mode,

Recording

&

Tape

Switch,

Loudness

&

High

Filter

Switch

Meter

Range

&

Speaker

RELAY

Relay,

Speakers

Protection

&

Muting

CABINET

and

CHASSIS

PARTS

Knob,

Volume

Control

Button,

Push

Switches

Knob,

Loudness

&

Power

Switch

etc.

Knob,

Balance

Control

Knob,

Bass

&

Treble

Ornament,

Volume

Knob

Ornament,

Bass

&

Treble

Knobs

Nut,

Bass,

Treble,

Balance,

&

Volume

Washer

(Spring)

Balance

&

Volume

Panel,

Front

Ass'y

Shading

Cloth

Screw,

Front

Panel

M'tg

Meter

Bracket,

Power,

Tape

&

Rec

Mode

Switches

Bracket,

Loudness,

Filter

&

Mode

Switches

Screw,

Push

Switch

M'tg

Bracket,

Printed

Circuit

Board

Screw,

Printed

Circuit

Board

M’tg

Bracket,

Meter

Bracket,

Meter

Screw,

Meter

Bracket

M’tg

Bracket,

Electrolytic

Capacitor

Holder,

Meter

Lamp

Screw,

Fuse

Holder

M'tg

(Except

set

for[XAL])

Holder,

Fuse

(Except

set

for

[XAL]

)

Bracket,

Fuse

Holder

(Except

set

for[XAL]

)

Bracket,

Printed

Circuit

Board

Jack,

Headphones

Lead

Clamp

Screw,

Chossis

M'tg

(Left

&

Right

Side)

Foot,

Set

Washer,

Set

Foot

M'tg

Screw,

Set

Foot

M'tg

Terminal,

Input

Screw,

Rear

Panel

M’tg

Rear

Panel

Rear

Panel

Rear

Panel

Mear

fanct,

SGFOTOSR

with

Name

Fiddle

(SGT

13671)

Rear

Panel,

SGP670-2B

with

Name

Plate

(SGT

13670)

—-

NBN

HN

HK

ON

mS?

-

H-

MWWNHN

-

WoeNnNo

Ree

eee

oe

--s350-5p

32

DA

41

[XA]

only

42

[XAL]

only

43

44

45

46

47

48

SHR127

SHBIS1

XTN3+8BFZ

SGP9023

SUE3

XTB3+8BFZ

XSN3+6F

ZS

XWASBFZ

RJS31-1

XTB3+8BFZ

SJF

4803-2

Part

Name

&

Description

Bushing,

AC

Cord

(Except

set

for

[XAL]

&

[XE]

)

Bushin

,AC

Cord

Screw,

AC

Outlet

M'tg

Cover,

Rear

Panel

Hole(Except

set

for{XAL])

Cover,

Rear

Panel

Hole

Screw

Heat

Sink

M'tg

Screw,

Voltage

Selector

Switch

M'tg

Washer,

Voltage

Selector

Switch

M'tg

Socket,

Tape

Deck

Connection

(DIN)

Screw,

DIN

Socket

M'tg

Terminal

Board,

Speaker

49

SHR401-1

50[XA,XAL,

XG,

|

SKA8253W

XGH,

XGF]

50

[XSD,

XSW]

|

SKA8472W

50

[XE]

SKA8471W

51

SQXA4112

52

XWGb5FZ

53

XWA4BFZ

54

XTB4+16F

FZ

Latch,

Terminal

Board

M'tg

Cabinet,

Black

Wooden

Cabinet,

Black

Wooden

Cabinet,

Brown

Wooden

Caution

Label,

Cabinet

Screw

Washer,

Cabinet

Screw

Washer

(Spring),

Cabinet

Screw

Screw,

Cabinet

M'tg

Per

=NS|N-]NNH

HHA

SPHHN--

cereal

ACCESSORIES

A2

RJP5

A3

[XA]

only

SJP5213

A4

[XA]

only

SJP5215

Plug

Adapter,

Power

Plug

Adapter,

Power

PACKING

PARTS

Py

SPP495

P2

SPS971

P3

SPS969

P4

SPS967

P5

SPS965

P6

[XA,

XAL,

SPG995

XG,

XGH]

P6

[XSD,

XSW]

P6

[XGF]

P6

[XE]

P7

[XG,XGH,XGF,

XSD,

XSW]

Polyethylene

Bag

Pad,

Right

Upper

Side

Pad,

Right

Lower

Side

Pad,

Left

Upper

Side

Pad,

Left

Lower

Side

Carton

Box

SPG997

SPG

1063

SPG999

SQF

1525

Carton

Box

Carton

Box

Carton

Box

Printed

Matter,(Instructions

Book)

P7

[XA,

XE]

P7

[XAL]

SQF

1521

SQF

1523

Printed

Matter,

{Instructions

Book)

Printed

Matter,

(instructions

Book)

The

model

[XA]

is

available

in

Asia,

Latin

America,

Middle

East

and

Africa.

The

model

[XAL]

is

available

in

Australia

only.

The

model

[XG]

is

available

in

European

only.

The

model

[XGH]

is

available

in

Holland

only.

The

model

[XSD]

is

available

in

Scandinavia

only.

The

model

[XSW]

is

available

in

Switzerland

only.

The

model

[XE]

is

available

in

England

only.

The

model

[XGF]

is

available

in

France

only.

OO00

OO000O

@

CABINET

ILLUSTRATION

FOR

(XSD),

(XSW)

&

(XE)

Set

for

[XSD]

and

[XSW]

are

black

wooden.

Set

for

[XE]

is

brown

wooden.

mw

ACCESSORIES

(only

set

for

[XA])

(only

set

for

[XA]

)

=

PACKINGS

ZA

FRONT

VIEW

Printed

in

Japan

SU-7700

7702-8,000

@

|

ORDER

NO.

SD7705-1230

ervice

Manual

Stereo

Integrated

Amplifier

.

-

SU-7700K

XG),

(XGH),

(XSD),

(XSW)

The

model

SU-7700K

(XG)

is

available

in

European

only

The

model

SU-7700K

(XGH)

is

available

in

Holland

only.

The

model

SU-7700K

(XSD)

is

available

in

Scandinavia

on|

The

model

SU-7700K

(XSW)

is

available

in

Switzerland

oti.

For

additional

information,

please

refer

to

the

service

manual

for

Model

No.

SU-7700.

Notes:

*

This

service

manual

includes

only

the

changes

of

the

SU-7700

service

manual

(ORDER

NO.

SD7702-1196).

*

When

servicing

model

SU-7700K,

this

service

manual

and

SU-7700

(ORDER

NO.

SD7702-1196)

service

manual

should

be

used

together.

CHANGES

=

REPLACEMENT

PARTS

LIST

Change

of

Part

No.

Part

Name

&

Description

C151,152

oy

as

Capacitor,

fo262

Seat

Button,

Selector

&

Meter

etc,

Push

Switches

Knob,

Loudness

&

Power

etc.

Lever

Switches

Panel,

Front

Bracket,

Meter

SGP670B

SGPU7700KG

Rear

Panel,

SGP670B

with

Name

SGP670-1B

[XA]

[XG,

XGH]

Plate

(SGT13674)

SGP670-2B

[XE]

,

SGPU7700D[XSD,

XSW]|

SGPU7700KD

Rear

Panel,

SGP670B

with

Name

SGPU7700L

[XAL]

[XSD,

XSW]

Plate

(SGT13675)

Res

SORE

SHR127

SHR131—«[XAL,

XE]

|

SHR127

Deletion

XTN3

+

8BFZ

[XA]

Deletion

Matsushita

Electric

Trading

Co.,

Ltd.

@

‘Technics

PO.

Box

288,

Centrd

Csaka

Japan

Change

of

Part

No.

ange

Oo

Part

Nlania’®

Descrintion

=

SU-7700K

ne

SKA8253W

|

SkAs253W

[XG,

XGH]

|

XGH

|

Cabinet

cae

Co

er

SKA8472W

[XSD,

XSW]

|

SKAB253W

[XG,

XGH]

|

SKA8472W

|

KARI

KEI

SD,

XSW

eon

es

ae

Oe

a

es

a

[Aé_|_SJP5215

[XA]

|

Deletion

Speer

ixsp,

xsw)

|_SPE95

(XG,

xGH)

Fewenae

paige?

REL

|

spaser

_ixs0,

xswi

Sereten

SQF1525

P7

SQF1521

[XA,

AL

SQF1525

Instructions

Book,

Printed

Matter

SQF1523

[XAL]

Printed

in

Japan

7705-5600

@

Technics SU-7700 - SCHEMATICS User manual

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