Sansui 771 Manual de usuario

771

This

service

manual

is

designed

for

service

engineers

to

repair,

adjust,

maintain

and

order

the

replacement

parts

of

the

771

correctly.

When

ordering

the

parts,

use

the

stock

number

and

parts

name

speci-

fically

referring

to

the

Parts

Locations

&

Parts

List.

For

general

usage

and

maintenance

of

the

unit,

please

refer

to

the

Operating

Instructions

attached

with

the

unit.

TABLE

OF

CONTENTS

Section

Title

Page

1,

:

SPECIFICATIONS

«605053.

5cen

se

ean

eee

sine

cageweeet

een

Peet

2

2.

BLOCK

DIAGRAM

AND

LEVEL

DIAGRAM

..............--------

3

94.-

“Block:

Diagram:

.csnwresduee

outages

vasasen

er

eeeeae

Oy

2-3;

.

‘Vevel

Didgtam:-

246

cfas0es

Motes

Meade

dee

esas

eG

esas

wel

ne

4

3.

THREADING

OF

DIAL

CORD

..................-2

2.

cece

eee eee

ees

5

4.

ALIGNMENTS

AND

ADJUSTMENTS

.............----.-0

0s

sees:

6

4-1,

Driver

Circuit

Board

Adjustment

...........--..2

ee

eee

ee

eens

6

4-2.

FMIF

Alignment..........

0...

eee

ee

ete

eee

ene

es

7

4-3,

FM

Dial

Calibration

and

RF

Alignment

...........--+++++--

7,8

4-4,

FM

Signal

Meter,

Mono

Distortion

and

Muting

Adjustment

....

8

4-5.

MPX

Alignment

.........ccce

cece

erence

eee

e

rene

een

eter

enee

9

4-6.

AM

IF,

Dial

Calibration,

RF

and

Signal

Meter

Alignment....

9,

10

5.

TROUBLESHOOTING

CHART

..............-.

6.

eee

e

eee

ees

11

5-1.

Troubleshooting

on

Power

Supply

Section

..........-..+++-.

11

5-2.

Troubleshooting

on

Audio

Section

..........

6...

eee

e

eee

eeee

11

5-3.

Troubleshooting

on

Tuner

Section

..........--++

+++

eee

ee

11,12

6.

PARTS

LOCATIONS

AND

PARTS

LIST

............--.----+5--

13

6-1.

F-1479D

Tuner

Circuit

Board............

00

eee

eee eee

13,14,

15

6-2.‘

F-1504

Mic

&

Tone

Control

Circuit

Board............-...555.

15

6-3.

F-1503

Equalizer

Circuit

Board.........-.

2.

seers

eee

ee

eee

ee

16

6-4.

F-1505

Filter

Circuit

Board.

.......

0...

ccc

c

ener

eer

e

ee

eeee

17

6-5.

F-1490

De-emphasis

Circuit

Board

........--..

ss

eee

e

eee

17

6-6.

F-1499A

Driver

Circuit

Board

...........

0c

eee

ee

eee

17,18

6-7.

F-1500C

Power

Circuit

Board

...........0

eee

19,

20

6-8.

Other

Parts

(Front

Side)....

6.0.6...

cece

eee

21,22

6-9.

Other

Parts

(Top

Side)

..........

sce

e

ere

e

cence

eee

n

eee

23

6-10.

Other

Parts

(Bottom

Side)........

ec

cece

eee

ete

eee

ee

23

7.

SCHEMATIC

DIAGRAM

OF

TUNER

SECTION

..............-...

24

8.

SCHEMATIC

DIAGRAM

OF

AUDIO

SECTION

..............-..-

25

Q:

PACKING

LIST

cciscicc5

6k

he

dcs

ari

iceeie

dienes

ea

eae

26

10.

ACCESSORY

PARTS

LIST

...............

20:

cece

eee

teen

ees

26

11.

MAINTENANCE

..............0-..

000

eee

e

ee

eee

een

eens

26

11-1.

Voltage

Adjustment......

6.60.6...

c

eee

eens

26

1.

SPECIFICATIONS

AUDIO

SECTION

POWER

OUTPUT

(at

rated

distortion)

MUSIC

POWER

(IHF)....--

140W

(420

1,000Hz)

110W

(8Q,

1,000Hz)

CONTINUOUS

POWER

(Each

Channel

Driven).

.55/55W

(4

1,000Hz)

45/45W

(8Q

1,000Hz)

(Both

Channels

Driven).

.40-+-40W

(8Q

1,000Hz)

32+

32W

(8Q,

20

to

20,000Hz)

TOTAL

HARMONIC

DISTORTION

(at

rated

power

output)

OVERALL

(from

AUX)

....less

than

0.5%

INTERMODULATION

DISTORTION

(at

rated

power

output,

70Hz

:

7,000Hz=4

:

1

SMPTE

method)

OVERALL

(from

AUX)

....less

than

0.5%

POWER

BANDWIDTH

(IHF)

15

to

40,000Hz

FREQUENCY

RESPONSE

(at

1

Watt

power

output)

OVERALL

(from

AUX)

....15

to

30,000Hz

*7°5dB

EQUALIZATION

(at

TAPE

REC

output)

Piette

aimee

aes

RIAA

Curve

|

(30

to

15,000Hz

+1.0dB)

LOAD

IMPEDANCE

.......-

4to

160

DAMPING

FACTOR

........

60

(8Q)

CHANNEL

SEPARATION

(1,000Hz,

at

rated

power

output)

PHONO

--4506.20/26e

¥esGe

ds

better

than

45dB

AUN);

2

bas

adacev

ae

better

than

45dB

HUM

AND

NOISE

(IHF)

PHONO

sdexuicsGexaauns

better

than

70dB

ALC,

Unis

cracied

es

fies

better

than

80dB

INPUT

SENSITIVITY

AND

IMPEDANCE

(1,000Hz,

for

rated

power

output)

PHONO:

sa:cudeeeeneiks

2.5mV

50kQ,

(Max.

input

capability:

200mV

at

rated

distortion)

MIC

(monophonic)

......

2.5mV

50kQ

POTD.

coqtiatniaiiced

auess

100mV

50kQ

TAPE-1

PLAY

Jacks

........

100mV

50k,

REC/PLAY

DIN

Socket

..100mV

50kQ

TAPE-2

(4-CH

ADAPTOR)

PLAY

Jacks

........

100mV

50k

RECORDING

OUTPUT

TAPE-1

REC

Pitt:

JaCKS:

#.ccs50c0u

100mV

REC/PLAY

DIN

Socket

..30mV

TAPE-2

(4-CH

ADAPTOR)

REC

Jacks

..........

100mV

SWITCHES

AND

CONTROLS

BASS

sid

tad

ete

thew

Rae

es

+12dB

at

50Hz

TREBLE

ssatusns-en

tere

sees

+12dB

at

10,000Hz

LOUDNESS:

sues

55464406

+10dB

at

50Hz

+8dB

at

10,000Hz

LOW

FILTER

......-......

—10dB

at

50Hz

(6dB/oct.)

PLIGHAFILTER:

onder

ohwskas

—10dB

at

10,000Hz

(6dB/oct.)

TUNER

SECTION

<FM>

TUNING

RANGE

..........

88

to

108MHz

SENSITIVITY

(IHF)

.....-.-5.

2.0uV

TOTAL

HARMONIC

DISTORTION

MONO

ak

eee

beens

es

0.4%

STEREO

wore

edie

ounet

0.6%

SIGNAL

TO

NOISE

RATIO

..better

than

60dB

SELECTIVITY:

sonseSs:

c3500%

better

than

60dB

CAPTURE

RATIO

..........

2.0dB

IMAGE

REJECTION

........

better

than

75dB

at

93MHz

IF

REJECTION

..........45-

better

than

90dB

at

98MHz

SUPURIOUS

RESPONSE

REJECTION

pals

eee

Lena

aa

better

than

80dB

at

983MHz

SPURIOUS

RADIATION

....less

than

34dB

STEREO

SEPARATION

......

better

than

35dB

at

400Hz

FREQUENCY

RESPONSE

....30

to

12,000Hz

*3:9d8

ANTENNA

INPUT

IMPEDANCE

Bape

a

auihyueds

3002

balanced,

75

unbalanced

<AM>

TUNING

RANGE

.......-.-

535

to

1,605kHz

SENSITIVITY

(Bar

Antenna)

..50dB/m

at

1,000kHz

SELECTIVITY

s2c4%

err

better

than

28dB

at

1,000kHz

IMAGE

FREQUENCY

REJECTION

uber

Sule

ape

isatee

better

than

80dB/m

at

1,000kHz

IF

REJECTION

.........-

better

than

80dB/m

at

1,000kHz

OTHERS

SEMICONDUCTORS

TRANSISTORS

.........---

49

DIODES.

susie

deca

biiae

sees

25

FETS:

xe

cecdlsaeares

a

earn

ee

3

[Seas

cae

bata

Gem

panes

3

ZENER:

DIODES:

244.0

6%2No

es

4

POWER

REQUIREMENTS

VOLTAGE.

4auscoehaaades

100,

117,

220,

240V,

50/60Hz

CONSUMPTION

......-.-

100W

(rated),

310VA

(max.)

DIMENSIONS

..........065-

480mm

(18-74”)

W

135mm

(5-34”)

H

300mm

(11-%6”)

D

WEG

onctcine

vee

se

ties

12.0kg

(26.4

Ibs.)

net,

14.6kg

(32.7

Ibs.)

packed

*

Design

and

specifications

subject

to

change

without

notice

for

improvements.

wl

a

~

2.

BLOCK

DIAGRAM

AND

LEVEL

DIAGRAM

2-1.

Block

Diagram

0)

09u

23d

VL:

0)

09u

Tad

VL

O)AVId

24d

VL

US)

aid

Lad

VL

O)z-XNV'

OvTXNY.

S)ONOHd

103

aa

|

id

‘

BOLYNIMIHISI

|

S

Yor

ai

109

a

sar

ar

|

us

Sif

(P

(Pp

ap

(P

zoa

|

Sng

aE

rq

iS

CH

not

wa

iS

‘

ie

==

zo

+e

/\

Otui

6O0uL

Fan

BOUL

ZOYL

q

SOUL

He

go,

«OO

Va

GOL

POL

£049

2049

rT)

LINDYID

YANNL

‘

Y

L

LHD!

3)034

ZAdVL

o)O3Y

T3d¥L

S)AW

Id

Z-AdWL

€

SyAWId

T'adWL

fi

Y

O)eXNY:

g

=

TxN¥

D-

S)ONUHE

3)

e6s

ae

5

1437

peep]

Caer

bse

LINDYID

MSA

LINDUID LINDYID

TONLNOD

ANOL

73

SIAN

LINDYID

yal

yazitvnodg

(A)

HOLIMS[

7

©)

SISVHAIS-3G

Wd

|

aed

‘

O6VT-4

Li

YOLYDIONI

y

=

:

ts

us

OauaLS

Wd

}

y

To

1

_@)

f

BS

#

a4

p

,

|

as

fa

1c

i

oa

vit

_

PETES")

7

rt

£ele

of)

t

!

STML

0

YY)

=e

oz)

CH

;

G)—

\

3

”

4

Q

zoey

oy

ast

i

;

en

I

6

}

7

|

dg

ie

KT

Sie

i

a

Zz

ah,

D

@

eae

Ie

pl]

=F

-

é

60L

wwyadd

gob

LOY

1

#0

-

a

wawwnn

=

°C

=I

ial

ae

14)

38

“a

4

lt

t/

1

|

LS,

4

i

1

iT

zeo

FD

ag

/

!

Ih

8

TT,

V4

:

Ota

Ri

rome

t=

.

ip

Shu

mn

a8

!

=H

1€9

ii

aniey

oh

~ffl

ONIN

Hd

youd

Zor

'

S01

=

7

TO27

NY

WIE

i

:

ad

'

8

t

cOL

TOL

TOUL

EOIEODL

g

80;

OUSZ

eee

POWER

CIRCUIT

POWER

SIT.

$10:

SP

SELECTOR

$07;

AUDIO

MUTING

S09:

SELECTOR

S05:

HIGH

FILTER

$03:

MONO

TAPE

MONITOR-1

S01:

OFF

1.

OFF

ie

PHONO

2.

FM

1.

OFF

1.

OFF

l.

STEREO

2.

MONO

$04;

LOUDNESS

1.

OFF

1.

ON

$12:

DE-EMPHASIS

ON

$08:

FM

MUTING

ON

$06:

LOW

FILTER

ON

$02:

TAPE

MONITOR-2

AM

4.

AUX-]

§.

AUX-2

50uS

2.

75pS

1.

OFF

1.

ON

2.

OFF

1.

OFF

2.

ON

1

5.

A+B

6.

A+C

ON

2-2.

Level

Diagram

*

Each

number

(@,

@,

@...-)

indicated

in

Level

Dia-

gram

undermentioned

corresponds

to

the

number

in

Block

Diagram.

1.

MASTER

VOLUME

control

...........--:

Maximum

2.

BASS,

TREBLE,

BALANCE

volume

control

....Center

Se

INPUE

Sos

cot

encase

PHONO

2.5mV

1kHz

Sine

Wave

AUX-1

100mV

1kHz

Sine

Wave

(output

impedance

of

600Q,

at

an

audio

oscillator)

A

QUtpUt.

acca

cadven

19V

(45W)

80

Note:

Each

voltage

value

is

for

reference

and

measured

by

a

VIVM.

In

some

recorders,

the

actual

volt-

age

value

is

in

minor

difference

from

the

refer-

ence

value.

3.

THREADING

OF

DIAL

CORD

*

Length

of

dial

cord......

approx.

150cm

(59

inch)

If

dial

cord

is

cut

or

slips,

replace

cord

by

following

procedures.

As

771

is

used

0.6mm¢

cord,

please

replace

it

with

same

type

certainly.

3

turns

(Counterclockwise)

1.

Threading

of

Dial

Cord

Thread

dial

cord

in

numerical

order

from

1

to

16

as

shown

in

Fig.

3-1.

1)

Close

the

variable

capacitor

completely

(Max.

ca-

pacitance)

and

tie

cord

to

number

screw

of

the

dial

pulley.

2)

Thread

cord

in

the

direction

of

arrow

from

1

to

3,

3)

4)

5)

then

wind

cord

three

turns

around

the

tuning

shaft

counterclockwise.

Thread

cord

in

the

direction

of

arrow

from

4

to

12,

then

wind

it

two

turns

on

the

dial

pulley

from

13

to

16.

After

16,

tie

cord

to

number

@

screw

of

the

dial

pulley.

*

When

you

perform

procedure

4)

successfully,

please

refer

to

the

followings.

@To

strengthen

the

dial

cord

tension,

hold

around

the

end

of

cord

and

pull

it

toward

the

Front

Panel.

@Then,

turn

tuning

shaft

counterclockwise,

as

the

cord

tension

will

be

more

constantly

obtained.

@®Tie

the

cord

to

number

@

screw

of

the

dial

pulley

(same

as

procedure

4)

).

After

procedures,

lock

the

knots

of

cord

with

paint.

2.

Attachment

of

Dial

Pointer

1)

Close

the

variable

capacitor

completely.

2)

Set

the

dial

pointer

to

“0”

on

dial

scale

and

insall

the

dial

pointer

ass’y

(See

Fig.

3-2).

Fig.

3-2

Stock

No.

Description

6036050

Dial

Cord

(0.6mm¢)

4.

ALIGNMENTS

AND

ADJUSTMENTS

Abbreviation

Equipment

Others

AM

FM

Generator

Oscilloscope...........-

Genescope

ClOCKWISE

bcceeedcoudscrewatersareus

sees

CW.

AM

Standard

Signal

Generator

............

AM

SSG

Counterclockwise......

ede

Brenda

ta

nceier

grate

CCW.

FM

Standard

Signal

Generator

............

FM

SSG

AMMA?

ere

Pow

eed

awe

ncttale

ch

Ree

aha

ks

ANT.

FM

Stereo

Generator...........eec

cence

eee

Stereo

SG

MOO

NATO

es

sa

eticxTas

os

pends

knedae

de Xs

MOD.

OstillOscOpe:

sextet

sess

ee

hdaee

veankeyess

Scope

Audio

Oscillator

><

svscxyndoxsetiswees

eats

Audio

Osci.

Distortions

Meter

wiiecsusateseawe

Sean

ies

Dist.

Meter

4-1.

Driver

Circuit

Board

Adjustment

(See

Figs.

4-1,

4-2

and

4-3)

Note:

1.

Master

Volume.........

eee

eeeeee

Minimum

2.

Speaker

Selector

..........eeeees

SYSTEM

(A)

3.

Make

the

SP

terminals

free

(no

load).

4.

Confirm

the

AC

Power

Supply

voltage.

5.

After

adjustment,

run

the

unit

for

more

than

5

minutes,

then

check

and

readjust

necessary.

6

.

Room

temperature

should

be

18~28°

(65~83°F)

for

bias

current

adjustment.

STEP

SUBJECT

EQUIPMENT

MEASURE

OUTPUT

|

ADJUST

|

ADJUST

FOR

CONDITION

1

DC

OV

L-ch

DC

volt

meter

Speaker

terminal

F-1499

|

OV

+10mV

oStep

down

meter’s

range

L-ch

VRO1

accordingly

(Fig.

4-7)

o

Change

lead’s

polarity

if

meter

swings

backward

2

DC

OV

R-ch

Same

as

above

Speaker

terminal

F-41499

Same

as

above

Same

as

above

R-c

VRO2

(Fig.

4-1)

3

Bias

current

DC

milliammeter

F-1500

F-1499

19+1mMA

oStep

down

meter’s

range

L-ch

FO1

VRO3

accordingly

(Fig.

4-2)

4

|

Bias

current

Same

as

above

F-1500

F-1499

Same

as

above

Same

as

above

i

R-ch

FO2

VRO4

(Fig.

4-2)

Fig.

4-1

Fig.

4-2

milliam-

volt

meter

©

mitliam-

meter

TLLLD

PDO

PLL

yf

ON

LO

VRo2

VRo4

bias

current

DC

OV

DC

OV

bias

current

volume

volume volume

4-2.

FM

IF

Alignment

(See

Figs.

4-8

and

4-9

on

page

10)

Note:

1,

Selectofs

..s%desede

ss

uve

vevaswes

FM

AUTO

2.

Master

Volume

........eeee

eee

Minimum

3.

Output

level

of

genescope

......

After

attenuator

4.

Sweepwidth.........sceeeeeeene

1.5~2cm/150kHz

5.

Frequency

band

.......s+sesee

9.5~11.5MHz

GENE

SCOPE

6.

Connection

eoaeneeernaeeaeese

se

aase

Connect

the

output

of

genescope

to

TP.A

through

100p

ceramic

capacitor.

7.

Before

adjustment,

turn

both

VRO1

and

VRO2

CCW

(Max.),

VRO3

CW

(Max.)

and

VRO4

to

center.

IN

4.7kQ

10pF

DETECTOR

PROBE

BLOCK

FEED

SIGNAL

MEASURE

STEP

SUB

ADJUST

FOR

CONDITION

|

ESE

|

FROM

|

TO

OUTPUT

1

IF

coil

Output

55dB

Base

of

TRO1|

Connected

TO1,T02

|

Max.

IF

wave-

|

oTurn

core

of

T06

Genescope

on

F-1479

Point

between

form

1

as

CC

(Fig.

4-9

R48

&

R50

on

Fig.

4-8

TP.A)

F-1479

(Fig.

4-9

TP.B)

Use

Detector

Probe

~°

2

Meter

coil

Same

as

above

Same

as

Connected

T06,

TO7

Max.

IF

wave-

above

point

between

from

2

R62

&

VRO2

on

Set

the

center

F-1479

of

wavefrom

2

(Fig.

4-9

TP.D)

with

wavefrom

Direct

from

1

as

Fig.

4-8

Genescope

3

Descrimina-

|

Same

as

above

Same

as

Connected

T04

Max.

linearity

tor

coil

above

point

between

of

S

curve

R67

&

R68

on

TO5

Set

the

center

F-1479

of

S

curve

(Fig.

4-9

TP.C)

wavefrom

1

&

Direct

from

2

as

Fig.

4-8

Genescope

4

IF

coil

Same

as

above

Same

as

above

}

103

Max.

noise

4-3.

FM

Dial

Calibration

and

RF

Alignment

(See

Fig.

4-9

on

page

10)

Note:

Selector

FM

AUTO

.

Master

Volume

Minimum

er

ee

meee

e

sears

nee

erase

wreesewa

ee

ere

nese

eeowre

enn

eone

vere

em

eee

ne

seers

e

sevens

.

Confirm

start

point

of

dial

pointer

before

alignment.

1.

2

3.

FM

Muting

switch

OFF

(pushed

in)

4

5.

In

Step

3,

4

and

5,

1

and

2

are

readjusted,

repeat

3,

4

and

5

again.

FM

SSG

FEED

SIGNAL

MEASURE

STEP

UBJECT

ADJUST

FOR

CONDITION

|

aun

|

FROM

|

TO

|

OUTPUT

)

1

|

88MHz

ANT

REC

OUTLor

|

L04

Max.

output

oSet

Dial

on

88MHz

Dial

Calibration

|

ANT

input

60dB

terminal

|

R-ch

1kHz

(100%

MOD)

|

3009

VTVM

&

Scope

FM

SSG

i

cocbyoabreabessboegt

2

|

108MHz

Same

as

|

Same

as

Trimmer

Same

as

eSet

Dial

on

108MHz

Dial

Calibration

|

ANT

input

60dB

above

TC04

above

1kHz

(100%

MOD)

FM

SSG

is

104

=

106

Veaufoordianteno

FEED

SIGNAL

MEASURE

STEP

———

ADJUST

FOR

CONDITION

3

|

Confirm

88MHz

|

Same

as

Step

1

Same

as

|

Same

as

Confirm

olf

not,

repeat

from

Dial

Calibration

above

88MHz

Dial

Step

1

.

Calibration

4

|

Confirm

98MHz

|

98MHz

Same

as

|

Same

as

Confirm

Dial

Calibration

|

ANT

input

60dB

above above

98MHz

Dial

1kHz

(100%

MOD)

Calibration

FM

SSG

.

5

|

Confirm

Same

as

Step

2

Same

as

|

Same

as

Confirm

olf

not,

repeat

from

108MHz

above

108MHz

Dial

Step

2

Dial

Calibration

6

|

88MHz

RF

Adj.

|

88MHz

Same

as

|

Same

as

LO1,

LO2,

L03

|

Max.

output

eTune

FM

SSG

(Max.

ANT

input

10dB

above

indication

of

Signal

1kHz

(100%

MOD)

Meter)

FM

SSG

7

|

108MHz

RF

Adj.

|

108MHz

Same

as

|

Same

as

Trimmer

Same

as

Same

as

above

ANT

input

10dB

above

TCO1,

TCO2,

|

above

1kHz

(100%

MOD)

TCO3

FM

SSG

4-4.

FM

Signal

Meter,

Mono

Distortion

and

Muting

Adjustment

(See

Fig.

4-9

on

page

10)

Note:

1.

Selector.

..........-ccc

cece

cececes

FM

AUTO

2.

Master

Volume

..............000.

Minimum

FEED

SIGNAL

MEASURE

STE

BEC.

jo

————.

ADJUST

|

ADJUST

FOR

CONDITION

|

sab

|

FROM

[To

|

OUTPUT

J

1

|

Signal

Meter

|

98MHz

ANT

termi-

|

Signal

Meter

|

VRO2

4.3

on

meter

oTune

FM

SSG

(Max.

ANT

input

66dB

nal

indication

of

Signal

1kHz

(100%

MOD)}|

3000

Meter)

:

;

FM

SSG

;

5

oBefore

adjustment,

if

ens

meter

swings

out

or

not

enough,

preadjust

VRO2

until

the

reason-

able

point

2

|

Distortion

Same

as

above

Same

as

REC

OUTL

|

TOS

Min.

distortion]

oTune

FM

SSG

(Nax.

above

or

R-ch

indication

of

signal

Dist.

meter

meter)

&

Scope

3

|

Muting

Level]

98MHz

Same

as

REC

OUTL

|

VRO3

Audio

signal

oSet

FM

MUTING

sw

itch

ANT

input

24dB

above

or

R-ch

just

muted

to

OFF

(pushed

in)

1kHz

(100%

MOD)

VTVM

&

FM

SSG

Scope

Tielman

iit

i

a

Eg

Tk

ee

OP

ee

ale

FU

ely Lig

Mos

4-5.

MPX

Alignment

(See

Fig.

4-9

on

page

10)

Note:

1.

Selector

......ccccscccccccecceeens

FM

AUTO

4.

Before

adjustment,

turn

VRO1

CW

(Max.)

and

VRO5

to

2.

Master

Volume..........0.cececeee

Minimum

center.

3.

FM

MUTING

switch

.............

OFF

(pushed

in)

STEREO

SG

AUDIO

OSC!

FEED

SIGNAL

MEASURE

STEP

SUBJECT

|

FROM

TO

OUTPUT

ADJUST

FOR

CONDITION

1

19kHz

98MHz

ANT

REC

OUT

||

LO08

Max.

output

oTune

FM

SSG

(Max.

coil

ANT

input

60dB

terminnal

L-ch

indication

of

signal

_

FM

SSG

3002

VTVM

&

meter)

.

Pilot

19kHz

Scope

(10%

MOD)

L-ch

1kHz

(45%

MOD)

R-ch

(0%

MOD)

Stereo

SG

2

Separation

Same

as

above

Same

as

REC

OUT

VROS

Min.

output

above

R-ch

VTVM

&

Scope

3

Cofirm

98MHz

Same

as

REC

OUT

Min.

output

olf

less

the

37dB

adjust

Separation

ANT

input

60dB

above

L-ch

VRO5

|

FM

SSG

VIVM

&

Pilot

19kHz

Scope

(10%

MOD)

L-ch

(0%

MOD)

R-ch

1kHz

(45%

MOD)

Stereo

SG

4

Indicator

98MHz

Same

as

Stereo

indi-

|

VRO1

Lighting

Point

|}

oTune

FM

SSG

(Max.

(Lighting

ANT

input

39dB

above

cator

lamp

indication

of

signal

level)

FM

SSG

meter)

Pilot

19kHz

(10%

MOD)

Stereo

SG

4-6.

AM

IF,

Dial

Calibration,

RF

and

Signal

Meter

Alignment

(See

Figs.

4-5,

4-6,

4-7

and

4-9

on

page

10)

Note:

1.

SéleClOfviiicctciiewas

cceyetnue

ks

AM

2.

Master

Volume

............

eee

Minimum

3.

Confirm

start

point

of

dial

pointer

before

alignment.

4.

In

case

of

using

loop

antenna,

increase

output

of

AM

SSG

for

26dB

than

bar

antenna’s

direct

input

as

it

attenuates

input

sensitivity

for

26dB

(See

Fig.

4-4).

3.

After

adjustment

of

signal

meter,

confirm

the

meter’s

swing

on

FM.

(If

meter

swings

out

or

not

enough,

readjust

VRO2.)

(See

Page

8)

Fig.

4-4

Ci}

BAR

ANT

LOOP

ANT

60cm

Sansui 771 Manual de usuario

Manuales populares de Receptor estéreo de otras marcas