Marantz SR2000 Manual de usuario

7.2

TUNER

BOARD

SCHEMATIC

DIAGRAM

AND

COMPONENT

LOCATIONS

—

P100

:

—

—_

SS

PIOO

TUNER

6

|

azos

BE

Soe

R204

®

R203

2820

£203

|

urine

any,

c201]Q0201_

fav

oot

[oy

’)

ihe

F202

F203

lav

reo

—=2

e——!

27

R205

‘360

4

AV

Rioa RIOS

22k

|

100

223"

47p

(For

7,

A)

|

.

+

1

¢r08

4k

fi,

C13

Ip

RiI¢

100

cake

+

av

ae

R219

150%

cle

Q105

a

aca

a

ibe

ag

ani

9204

ee

crane

|

7

22k

°

|

LOS

‘CUT

6.2

os

cise

|g

Haus

|

90?

{

2

top

|ous

[thy

aoe

Bs

S58

¥

Le

Ruz

ke

lo:

%

b

ee

orev

T

6304

3.3/50V

FE

30s

R301

"

re

mS

Lk.

Choa.

RAO3

io/eay

57tOk

caga

0.01

Laot

328

0.04

O

3011

re}

sere,

Lav

joav

jev

bv

by

©)--)--M

©

QAO!

=

pPCII7B

|

age

Ree

ee

uA

RAS

ba

R:

cate

BT

0.47/t0v

J303

9304

e409

0.012

Cll

0.0033

1k

4t

RaIt

270K RAIS

22k

€403

47p

R408

180k

402

3.3/50¥

P400

Rate

cron]

wala

82k

outol

PHONO

C410 0.01 C412

0.0033

404

47p

RatO

180k

|

7.3

MAIN

AMP/POWER

SUPPLY

BOARD

SCHEMATIC

DIAGRAM

AND

COMPONENT

LOCATIONS

—

P700

7.4

TONE

AMP

BOARD

SCHEMATIC

DIAGRAM

AND

COMPONENT

LOCATIONS

—

PEO00

|

PEOO

TONE

ASSY

]

32.8V

ree

en

ee

9709

|

vase

Fass

RTI

100

F703]

in

6

Arr7o1

S705

Vk

L701

yz)

Wir

8

728

Teh

|

O 4 9

Gaby

a703

pv

i

3

ov

@

RIT

4.7

(1/2W)

S19

7

RTI

ov

touw)

L

\R70:

=

ee

a

zit

S707

‘O.A/IOOV

ores

aby

|

psd

ELIS

B

FEIPY-@

arial

la70p

-

©)

Q704

bv

3706

a

Ren

RrOz

tk

cre

R

726

220/50V

oon,

2

10/80¥

Ea

|

983!

O

4833

O

tue)

iogoasd

(N)

e800/421¥

ayeat

asoviN

HITHA)

sv

ldgos:

Qgoee

i

uN

4

?

<

aerertcrnnmarsironmne

RES

|

He

:

as

Ob

weak

:

Jaze

P:

ie

,

a

.

a

:

Teo

|

as

:

é

{THAR

AM

es.

Sih

Oy

pt

de

Bb

a

= :

i -

{

Fees

yy

"

a

,

.

:

Phen

‘

Bveat

O

i

Vs:

SUS

NY

L

P

5

ee

ew

oi

oles

: : é

S

‘

Su

:

. ’

.

mag

erg

oe

aes

ose28

"ne

anor

cimesnnserrasoe

Rote

ann

Math

:

Sav

|ueoe)

iit

Pad

@)

he

ip

cea

abe

Teste

Ng

SACS

Sls

UNI

nicy

ts

O

Tale?

v8s4y

Jer?

Y

IBz0y

08:

denis

eee

crere

i624

a

815,

7.5

PUSHSWITCH

BOARD

SCHEMATIC

DIAGRAM

AND

COMPONENT

LOCATIONS

—

PS00

807

CAUTIONS

‘

[rsx

PSOO

SWASSY

|

REPLACE

WITH

SAME

TYPE

FUSE

Deank

y812

54250

AT

250

J811

‘5

j

FOR

CANADA

1

FOR

EURQBELU.K

807

|

cao2

;

a

|

Rs04

|

Losreos

rvosr

cosr

rg

CAUTION

U7

10

;

11

7.6

HEADPHONE

JACK

BOARD

SCHEMATIC

DIAGRAM

AND

COMPONENT

LOCATIONS

—

Pwoo

Fives

1

c

wae

oo.

xii

Lyxos

4x08

|

JX04]

sxa6:

C—O

ee

mere

ae

oe

ch

METER

ADJ,

RXO8

Ik

0x03

AXO3

33011W)

AW

4

ero

i

S¥stem

2

xu

Paaea

ger

Peon

3

vzoi

By

foomA

IP250

1

ee

|

JZ5i

:

3zs2

12

8.

EXPLODED

VIEWS

AND

PARTS

LIST

8.1

[€01-99]

FRONT

PANEL

For(N)

TYPE

004B

For(N)

TYPE

0048

@

(U):

for

U.S.A.

@(C):

for

Canada

@

(N):

for

Europe

ae

[|

2112063400

Front

Pane!

Assembiy

2112063410

Front

Panel

Assembly

2112158110

Window,

Dial

2112158120

Window,

Meter

2112063010

Escutcheon

2112063110

Escutcheon,

Low

Filter

2112063040

Escutcheon,

Wood

2112063050

Escutcheon,

AL.

2112160020

Bracket

(R)

2112160030

Bracket

(L)

2112154010

Knob

2112115010

Spring

53118169A0

Hexagon

Nut

2112154020

Knob

2112154030

Knob

2112154040

Knob

51100308A9

|

B.H.M.

Screw

51280308B0

|

B.H.

Tapped

Screw

51400310A0

B.H.

Tapped

Screw

51280306B0

B.H.

Tapped

Screw

51280308B0

B.H.

Tapped

Screw

41280308B0

B.H.

Tapped

Screw

2112303010

Mask

2276005050

Clamper

2112259020

Bushing

2112259030

Bushing

13

MARANTZ

DESIGN

AND

SERVICE

Using

superior

design

and

selected

high

grade

components,

MARANTZ

Company

has

created

the

ultimate

in

stereo

sound.

Only

originat

MARANTZ

parts

can

insure

that

your

MARANTZ

product

wil!

continue

to

perform

to

the

specifications

for

which

it is

famous.

Parts

for

your

MARANTZ

stereo

are

generally

available

within

72

hours

throughout

the

nation

via

a

toll-free

line

to

our

National

Parts

Depot

in

California.

The

sales

professionals

who

take

your

call

immediately

refer

to

their

own

desk

tap

com-

puter

terminal

and

can

quickly

determine

the

availability

and

price

information

you

require.

1f,

for

some

reason,

your

order

should

exceed

our

available

stock,

we

usually

can

instantly

provide

an

alternate

replacement

part

or

current

delivery

infor-

mation.

When

the

order

is

placed

and

confirmed,

the

computer

simultaneously

generates

“hard

copy”

orders

at

the

distribution

center,

As

hard

copies

come

directly

from

the

computer

to

the

national

parts

depot,

your

requested

stock

is

assembled

and

prepared

for

shipment

and

placed

on

the

first

available

carrier

for

delivery

to

you.

ORDERING

PARTS

Phone

orders

will

eliminate

mail

delays,

and

we

encourage

the

use

of

this

method.

If

you

order

by

mai!,

usze

MARANTZ

parts

order

torms

which

are

available

from

our

National

Parts

Depot

located

at

the

following

address:

:

SUPERSCOPE

NATIONAL

PARTS

DEPARTMENT

20525

Norchoff

Street

Chatsworth,

California

91311

Phone:

1-800-423-5108

1-213-998-9333

The

following

information

must

be

supplied

to

eliminate

defays

in

processing

your

order:

Complete

address.

Complete

part

numbers.

Complete

description

of

parts.

‘ : :

Model

number

for

which

part

is

required

(indicate

MARANTZ}.

Account

number

(for

account

customers

only).

CP

Ne

Direct

consumers

will

be

provided

with

the

current

retail

price

quotation

on

available

parts

in

order

to'advise

them

of

the

cost

of

the

parts

and

shipping.

;

OVERSEAS

PARTS

ORDERING

Parts

may

aiso

be

ordered

from

the

following

overseas

addresses:

|

CANADA

-

AUSTRALIA

©

JAPAN

Superscope

Canacla,

Ltd.

-

Superscope

{Australasia}

Pty.,

Ltd.

_

Marantz

Japan,

Inc,

3710

Nashua

Drive.

-

32

Cross

Street

(P.O.

Box

604)

3622

Kamitsuruma

Mississauga

Brookvale

2100

N.S.W.

:

Sagamihara

Shi

Ontario,

Canada

L4VIM5

|”

Austratia

,

Kanagawa,

Japan

EUROPE

Superscope

Europe,

S.A.

Marantz

France

Marantz

Audio

U.K.

Ltd.

Superscope

GmbH

Avenue

Leopold

IIf,

2

~-Rue

Louis

Armand

9

London

Road,

203

Max-Planck-Strasse

22

7120

Peronnes-Lez-Bincne

-

92600

Asnieres

Staines

D-6072

Dieieich

7

Belgium

'

Hauts-de-Seine

‘Middlesex

West

Germany

France

—

2S

England

-

All

of

the

above.

locations

are

fully

equipped

to

take

care

of

your

total

service

needs.

Because

various

countries

have

differing

configuration

requirements,

it

is

necessary

that

you

contact

the

service

facility

in

your

particular

country.

In

the

event

that

_

there

is

no

service

location

fisted

for

your

country,

please

contact

the

nearest

facility

for

the

necessary

assistance.

:

,

mame

Been

we

for.

_

We

sound

better

TABLE

GF

CONTENTS

Section

Title

Page

1,

PW.BGARDS

.........

ius

Gi

inlesboasialia

desler

wpeviefie'-d

afin

goa

uaCaNa

iar

dagsxl

be

arava

dye

iste

ee

eda

ena,

pit

aneite

a

ead

ace

tae

oh

oc

8

2,

TEST

EQUIPMENT

REQUIRED

FORSERVICING

.......0

0.0.00

cece

ee

ce

eee

teense

$a

ore

BAO

aR

ease

wl

Berean

eee

3

3.

FM

ALIGNMENT

PROCEDURES

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

tao

cat

opts

corer

Shins

gu

GahaiT

esa

he

Ld

uiety

stain

sha

al

cglterd)

wl

bam

cbs

are

ana"

eb

a

pea

iterate

gate

4

3.1.

Tuning

Meter

Alignment

.........

iy

ea

aates

ar

wile!

Statics

jnsaareimiint

ous

ac

Gh

aitarea)

&

erGua

raat.

er

eee

am

ork

ig,

Date!

vel

Ven

euny

ee

one

4

3.2

FM

Tracking

Alignment...

0...

ee

ees

Sabaneta’

anndey

aes

nis

“vk

otenage

iter

lated

aaretare

te

wee

ce

4

3.3

FMUF

Alignment...

..

dy

causal

ahs

Goad

oS

Bs

wise

Eider

Shins“

orfavag

wie

s0ijd

ap

ie

pes

ie

Blan

Wyatanwccai

Uh

Gr

eiteriel

tay

aiterg

caigea

de

Sw

anal)

anak

ate

Suey

4

3.4

Mono

Distortion

Alignment........

Fetch

fake

se

ten

elucrieine!

Deh

Ee

Nea,

laa!

ana

te

Matea

acetates

a

atleitesei

ae aa

eeuaeeaoe

beatae

ad

Beraaa

vay

Ga

4

3.5

Stereo

Distortion

Alignment

.........

ria

dpgisa

aire

Vets

akesey

ues

“#41

058.

ce

Seyi

lacara)

era

valves

ela

rat

el,

Gace

ta

tape:

tora

ads

ie

tatbury

iuaret

an

arasien

4

3.6

Multiplex

Alignment

,.......

eicheats

rem

ah

arart.

nineteen

toads

or

bseetar

ign

tat

as

'oSaP

iw"w

eile

ere

“aM

GE

Sey

Wins.

Wear

bine!

feel

a

weule

“oan

eee

5

3.7

Steres

Separation

Alignment

2...

ee

tee

eee

ete

eee

5

3.8

Muting

Level

Alignment...

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

are

Tela

“osteo.

weds

A

fests:

‘er'n

Se

saCa

ata

era?

ce

uasiwa

elas

tarde

Rtas

ase

gue’

aoa

ate

Boe

5

4,

AMALIGNMENT

PROCEDURES...

00...

0

ec

ee

te

ee

eee

ee

eee

ee

eens

§

4.1

AMIF

Alignment

.........

Pe

a

ee

5

4.2

AMTracking

Alignment.............-..

Sia

ee

erat

wa

we,

eee

Me

gy

Seaton

poe

arin

a:

wueteel

ps

ULI

a

de eS

Srelewere

fe

where

8,

te

5

§.

AUDIO

ADJUSTMENT

ooo

ee

eee

a

ie

ee

dee

erent

ieee

ES

0

Were

OES

a

eae

ae

wg

ne

alee

wee

eee

ee

6

5.1

Voltage

Adjustment

......-.....0004

gid

ovstatd

WiGraswc

die

he

atarens

“ay

avutige

ene

Aoi

eta

saaabar

Gis,

gia

Saye

hdcas

erect

ite

teh ara

avaebweits

6

6.2;

Poiver!

Matar

Calibration

«6.506

b.c00

oe

tics

yet

le

eta

te

Sev

eee,

aS

PhS

a

Sale

ays

wile

awn

lio

oa

wna)

ese

Goiasel

ashe!

few

a

ere

et

6

6.

VOLTAGE

CONVERSION

oi

ccn5

6

colic

vtensee

w

eras

eoa

e

Oe

ewe

wlohe

etd

Dow:

aE

bie

ecw

whe

Ses

wte aes

Merde

wee

ene

Shae

ca

aeae

6

7,

DIAGRAMS

2...

wc

ccc

cc

et

ce

te

ee

eee

4

farsboclip

Secep

Ry

Rican

uk

ae

cetyl

“es

ap

oh

wage

adam

wl

btareier

a

aveie

eh

auc

abeieeate

te

7

7.0

Block

Diagram

2...

1...

ee

soi

va

ehaie

ouceredshev

als

i:

aint Puch

eitarie

“or

ev

eeeitasianai

sat

Tare

.rsa,sawe

rater

fy

ooo

Siena

dy

ataved

tern

ars

7

7.2)

Tuner

Board

Schematic

Diagram

and

Component

Location-P100

.......

00000.

.,

2

eee

Siebel

ab

Nel

seta

eerste

carer

ie

8

7.3

Main

Amp/Power

Supply

Board

Schematic

Diagram

and

Component

LocationsP700

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

Seeeata

echt

eve:

Sista

Brace

10

74

Tone

Amp

Board

Schematic

Diagram

and

Component

Locations-PEOO.....

Dia

tatinies'ei

utes

GNaicevaRen

epauincar

puanel

9

Faecei

war

a/auacasahose

14

7.5

Pushswiteh

Board

Schematic

Diagram

and

Component

Locations-PS00...-...........

i

av

ay

ea,

aye

dl

cdng

aewerard

Wy

sh

Ete

hie

Cress

1

7.6

Headphone

Jack

Board

Schematic

Diagram

and

Component

LocationsPW0O

22...

ee

12

7.7

Power

Meter/Speaker

Switch

Board

Schematic

Diagram

and

Component

Locations-PXO0

2... 0...

0.

ce

ee

eee

12

7.8

Stereo

LED

Board

Schematic

Diagram

and

Component

Locations-PYODO

2...

ee

12

7.9

Dial

Pointer

Lamp

Board

Schematic

Diagram

.and

Component

Locations-PZ00

.

2.0.0.0...

ce

ee

eee

42

7,10

Tuning

Meter

Lamp

Board

Schematic

Diagram

and

Component

Locations

PZ50

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

Deity

“aise.

Syste

tess

chat

oteea

ek,

ars

eee

12

8.

EXPLODED

VIEWS

AND

PARTS

LIST

1.2.2...

0...

0c

ee

eee

ee

eee eee

ee

ep

er

eens

13

8.1

[€01-99}

Front

Panel

2.2.2...

2...

doll

aia

tartan

sees

Spleen

ed

digrtee

ah

te

ovdles

ak

a

acpaih

terete

ence

Naeetes

hie

are

eae

13

8.2

(€02-99]

TopCover..............

satiasra

i

Sanaite

ea)

obe

Py

Bocas

ace

ate™epa

lat

soia

eae

hee,

2,

Page

si

elle

toe

we

miebested

14

8.3

[C03-99}

Rear

Panet.

...

0...

ee

rahat

ates

es

Ses

wcidtataevat

hE

iG

AENeias

aceecesasehB

al

eae

arlene

15

8.4

[P01-95]

Front

Chassis

and

General

Parts

2.0...

1.

ee

eee

yar

btw

cde

aten

een

16

8.5

[P0299]

Chassis

and

Other

Parts

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

Aessaiyio

cast

ep

hai

ete

20d

RR

OES

Se

aca

lp

te

Rolhtacte

Shes

aim,

hiatal

asey

17

8.6

[HO1-99]

Packing

Materials...

0.

ee

te

ee

eee

ter

eee

ee

eee

ee

ene

18

8:7.

Electreal!

Parts

scx,

a

cescots

ao

eSys ahah

oa

teajaaparn

ekncaee

aah odo

7e

wigs

ok

Guo

wales

avec

AngvayS

wade

UAd

agente

dia

beeen

a

eee

19

9.

INTRODUCTION

This

service

manual

was

prepared

for

use

by

Authorized

Warranty

Stations

and

contains

service

information

for

Marantz

Model

SR-2000

Stereophonic

Receiver.

Servicing

information

and

voltage

data

included

in

this

gram.

manual

are

intended

for

use

by

the

knowledgeabte

and

ex-

perienced

technician

only.

All

instructions

should

be

read

1

carefully.

No

attempt

should

be

made

to

proceed

without

B)

a

good

understanding

of

the

operation

of

the

receiver.

The

parts

tist

furnishes

information

by

which

replacement

parts

may

be

ordered

from

the

Marantz

Company.

A

simple

description

is

included

for

parts

which

can

usually

be

ob-

tained

through

local

suppliers.

1.

P.W.

BOARDS

As

can

be

seen

from

the

circuit

diagram

the

chassis

of

Model

SR-2000

consists

of

the

follawing

units.

Each

unit

mounted

on

a

printed

cifcuit

board

is

described

within

the

square

enclosed

by

a

bold

dotted

line

on

the

circuit

dia-

moe

W

Oo

wm

2.

TEST

EQUIPMENT

REQUIRED

FOR

SERVICING

.

Tuner

.

Main

Amp/Power-

Supply

.

ToneAmp....--.

ee

rlurited

on

P.W.

Board

PEOO

.

Pushswitch

.

Headphone

Jack

......

mounted

on

?.W.

Board

PWOO

.

Power

Meter/Speaker

Switch

sted

aie

'y

Shensndtetaw

mounted

on

P,W,.

Board

PXOO

.

Stereo

LED

.........

mounted

on

P,W.

Board

PYOO

.

Dial

Pointer

Lamp

.

Tuning

Meter

Lamp

side

lesa

gt.

Since

aegis

mounted

on

PW.

Board

P100

mounted

on

P.W.

Board

P700

on

Dedaw

apis

-.

mounted

on

P.W.

Board

PSOO

.

mounted

on

P.W.

Board

PZ00

—

.

mounted

on

P.W.

Board

PZ50

This

table

lists

the

test

equipment

required

for

servicing

the

Model

SR-2000

Receiver.

Manufacturer

and

Model

No.

AM

Signal

Generator

Test

Loop

~

Use

with

AM

Signal

Generator

FM

Signai

Generator

MPX

Signal

Generator

Sound

Technology

Mode!

10004

Signal

source

for

FM

alignment

Stereo

separation

alignment

and

trouble

shooting

—

Distortion

Analyzer

Audio

Osciliator

AC

VTVM

Sound

Technology

Model

1700A

Oscilloscape

“Tektronix

Model

T932

Distortion

measurements

|

Sinewave

and

squarewave

signa!

source

Voltage

Measurements

{AC)

Phili

ips

‘Mode!

3232

Waveform

analysis

and

troubie

shooting

and

ASO

lignin

‘Frequency

Counter

Fluke

Model

4

900A

Circuit

Tester

DC

VTVM

AC

Wattmeter

-

Model

313,

Triplet

Model

80

Trouble

shooting

Fluke

Model

8000

“Digital”

Simpson

vole

measurements

ae)

Simpson

Model

1379

AC

Ammeter

Line

Voltmeter

Variable

Autotransformer

Shorting

Plug

Output

Load.

(8

ohms,

+

0.5%,

100W}

Output

Load

(4

ohms,

+0,5%,

100W}

Commercial

Grade

(7-TOA}

Simpson

Model

1359

Superior

Electronic

Co.,

__Powerstat

Model

116B—

104A

Use

phono

plug

with 600-

ohm

across

center

and

sheli

Commercial

Grade

Commercial

Grade

Monitors

amplifier

output

andek

short

circuit

condition

Monitors

potential

of

primary

power

to

amplifier

Adjusts

level

of

primary

power

to

eee

Shorts

ariplitien

input

to.

‘eliminate

noise

pickup

+

Provides

8-ohm

load

for

amplifier

output

termination

Provides

4-ohm

load

for

amplifier

output

termination

3.

FM

ALIGNMENT

PROCEDURES

(Selector

switch

in

the

FM

position)

3.1.

TUNING

METER

ALIGNMENT

1.

2.

Set

the

FM

signal

generator

to

no

signal,

Adjust

the

secondary

core

of

L201

((@)}

so

that

the

tun-

ing

meter

may

read

zero

(center

position),

NOTE:

Place

the

tuning

pointer

at

98

MHz

adjacency.

3.2

FM

TRACKING

ALIGNMENT

1.

Connect

an

FM

signal

generator

to

the

FM

antenna

ter-

minals

and

an

oscilloscope

and

an

audio

distortion

ana-

tyzer

to

the

TAPE

OUT

jacks

on

the

rear

panel,

.

Set

the

FM

signal

generator

to

87.3

MHz

and

provide

about

3

to

5

wV.

Place

the

tuning

pointer

at

the

low

fre-

quency

end

by

rotating

the

tuning

knob

and

adjust

the

core

of

oscillator

coil

L105

(()}

to

obtain

maximum

audio

output.

;

.

Set

the

FM

signal

generator

to

109

MHz

and

provide

about

3

to

5

uV.

Rotate

the

tuning

knob

and

place

the

tuning

pointer

at

the

high

frequency

end

and

adjust

the

trimming

capacitor

C114

((D))

for

maximum

output,

NOTE:

Keep

the

C114

at

a

half

of

satisfied

capacitance.

4.

5.

Repeat

steps

2

and

3

untii

no

further

adjustment

is

nec-

essary.

Set

the

FM

signal

generator

to

90

MHz

and

tune

the

re-

ceiver

to

the

same

frequency.

Decrease

signal

generator

output

untif

the

audio

output

jevel

decreases

with

the

decreasing

generatar

output.

Adjust

the

antenna

coil

L101

(8),

RF

coil

L103

(©)

for

minimum

audio

dis-

tartion.

6.

Set

the

FM

signal

generator

to

106

MHz

and

tune

the

receiver

to

the

same

frequency.

Adjust

the

trimming

capacitors

TC;

(B))

and

TC,

(©)

for

minimum

distor-

tion,

.

Repeat

steps

5

and

6

until

no

further

adjustment

is

nec-

essary.

3.3

FM

IF

ALIGNMENT

1.

Set

the

FM

signal

generator

to

98

MHz

and

increase

its

usable

output

level

and

tune

the

receiver

to

the

same

fre-

quency.

‘

.

The

L106

(©)

should

be

adjusted

for

maximum

output

waveform

with

decreasing

the

FM

signal

generator

input

level

so

that

the

amount

of

noise

should

be

the

same

on

and

beneath

the

waveform.

Readjust

the

L201

for

cor-

rect

zero

point

as

turning

the

L106

deviates

zero

point.

'3.4

MONO

DISTORTION

ALIGNMENT

i:

2.

3.

4.

Set

the

FM

signa!

generator

to

provide

60

dB

at

98

MHz.

Set

the

modulation

of

FM

signal

generator

to

1

kHz,

100%.

Place

the

tuning

meter

pointer

at

the

center

position.

Adjust

the

primary

core

(upper)

of

L201

((F))

for

mini-

mum

distortion,

25

STEREO

DISTORTION

ALIGNMENT

1.

2.

3.

Set

the

FM

signal

generator

to

provide

stereo

composite

signal

and

tune

the

receiver

to

the

same

frequency,

Adjust

the

L106

(©)

for

minimum

distortion.

Repeat

the

adjustment

of

L201

so

that

the

tuning

meter

may

read

zero.

,

g

©

LAOS

®

.

LSOl

AM

ANT

COIL

D>

Aol

@

S)

R313

Q

@

[race

|

“lem

Separation

ADJ.

[2D

_

oxo

L201

I9kHz

3akHz

DIS.cotL

(4)

Q40)

402

AM

SWEEP

INPUT

©)

7)

Tco4

~

AM

OSC

eae

UPPER:

MO

rr

ISFORTION

1

af

jReor

-—t

LI}

=

Ojem

muting

@

Ter

®

R225

ADJ.

FM

ANT

Liot

ee

Cees

Lios5

y

d

|

FM

OSG

U

AM

ANT

0

EM

ANT,

COR

Figure

1.

Adjustment

Point

Locatians

3.6

MULTIPLEX

ALIGNMENT

1

2

.

3.

4,

Connect

a

frequency

Counter

to

test

point

J301.

Set the

FM

signal

generator

to

provide

60

dB

{1

mV)

at

98

MHz.

Tune

the

receiver

to

the

same

frequency

so

that

the

cen-

ter

tuning

meter

pointer

indicates

its

center.

Turn

off

the

modulation

of

the

FM

signal

generator

and

adjust

the

R304

(@)

so

that

the

frequency

counter

may

a

precisely

react

19.08

kHz.

"3.7

STEREO

SEPARATIGN

ALIGNMENT

1,

Set

the

FM

signal

generator

to

provide

stereo

composite

signal

and

tune

the

receiver

to

the

same

frequency

so

that

the

center

tuning

meter

pointer

indicates

its

center.

.

Adjust

the

R313

()}

for

maximum

and

same

separa-

tion

in

both

channels.

3.8

MUTING

LEVEL

ALIGNMENT

1.

2.

3.

Set

the

FM

signal

generator

to

provide

22

dB

{12,6

nV)

at

98

MHz,

,

Set

the

modulation

of

FM

signal

generator

to

1

kHz,

100%,

,

Tune

the

receiver

to

the

same

frequency

so

that

the

cen-

ter

tuning

meter

pointer

indicates

its

center.

.

Turn

on

FM

MUTING

pushswitch.

.

Turn

the

R207

(C1)

until

the

output

waveform

disap-

pears

and

adjust

it

to

a

point

where

the

waveform

comes

to

appear

again:

Figure

2.

Dial

Stringing

4.

AM

ALIGNMENT

PROCEDURES

(Selector

switch

in

the

AM

position)

4.1

AM

IF

ALIGNMENT

1

Connect

a

sweep

generator

to

the

tuning

capacitor

C120

{for

AM

oscillator)

and

an

alignment

scope

to

the

test

point

JAGG.

.

Rotate

each

core

of

IF

transformers

LAGS

(())

and

LAO6

(D)

for

maximum

height

and

flat

top

symmetrical

-

response.

4.2

AM

TRACKING

ALIGNMENT

1.

Set

the

AM

signal

generator

to

520

kHz.

Tum

‘the

tuning

capacitor

fully

closed

(place

the

tuning

pointer

at

the

low

end)

and

adjust

the

oscillator

coil

LAO4

(OD)

for

_

maximum

audio

output.

.

Set

the

AM

signa!

generator

to

1650

kHz,

Piace

the

tun-

ing

pointer

in

the

high

frequency

end

and

adjust

the

trimming

capacitor

TC,

((L))

for

maximum

audio

output.

.

Repeat

steps

1

and

2

until

no

further

adjustment

is

nec-

essary.

.

Set

the

AM

signal

generator

to

600

kHz

and

tune

the

re-

ceiver

to

the

same

frequency

and

adjust

a

slug

core

of

AM

ferrite-rod

antenna

LO51

(K)}

for

maximum

output,

.

Set

the

generator

to

1400

kHz

and

tune

the

receiver

to

the

same

frequency

and

adjust

the

antenna

trimming

capacitor

TC,

(KK)

for

maximum

output,

.

Repeat

steps

4

and

5

until

no

further

adjustment

is

nec-

essary.

NOTE:

Use

the

loop

for

AM

tracking

alignment.

Marantz SR2000 Manual de usuario

Manuales populares de Receptor de otras marcas