Marantz SM500DC Manuel utilisateur

SERVICE

MANUAL

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af.

«gh

manele

Shore

Foor

Molin,

MARANTZ

DESIGN

AND

SERVICE

Using

superior

design

and

selected

high

grade

components,

MARANTZ

Company

has

created

the

ultimate

stereo

sound.

Only

original

MARANTZ

parts

can

insure

that

your

MARANTZ

product

will

continue

perform

the

specifications

for

which

it is

famous.

Parts

for

your

MARANTZ

stereo

are

generally

available

within

hours

throughout

the

nation

via

toll-free

line

our

National

Parts

Depot

California.

The

sales

professionals

who

take

your

call

immediately

refer

their

own

desk

top

com-

puter

terminal

and

can

quickly

determine

the

availability

and

price

information

you

require.

for

some

reason,

your

order

should

exceed

our

available

stock,

usually

can

instantly

provide

alternate

replacement

part

current

delivery

infor-

mation.

When

the

order

placed

and

confirmed,

the

computer

simultaneously

generates

“hard

copy”

orders

the

distribution

center.

hard

copies

come

directly

from

the

computer

the

national

parts

depot,

your

requested

stock

assembled

and

prepared

for

shipment

and

placed

the

first

available

carrier

for

delivery

you.

ORDERING

PARTS

Phone

orders

will

eliminate

mail

delays,

and

encourage

the

use

this

method.

you

order

mail,

use

MARANTZ

parts

order

forms

which

are

available

from

our

National

Parts

Depot

located

the

following

address:

SUPERSCOPE

NATIONAL

PARTS

DEPARTMENT

20525

Nordhoff

Street

Chatsworth,

California

91311

Phone:

1-800-423-5108

1-213-998-9333

The

following

information

must

supplied

eliminate

delays

processing

your

order:

Complete

address.

Complete

part

numbers.

Complete

description

parts.

Model

number

for

which

part

required

(indicate

MARANTZ).

Account

number

(for

account

customers

only).

OPWN

Direct

consumers

will

provided

with

the

current

retail

prive

quotation

available

parts

order

advise

them

the

cost

the

parts

and

shipping.

OVERSEAS

PARTS

ORDERING

Parts

may

also

ordered

from

the

following

overseas

addresses:

U.S.A.

CANADA

AUSTRALIA

JAPAN

Marantz

Company,

Inc.

Superscope

Canada,

Ltd.

Marantz

Australia

;

Marantz

Japan,

Inc.

National

Service

Dept.

3710

Nashua

Drive

Cross

Street

3622

Kamitsuruma

P.O.

BOx

577

Mississauga

Brookvale,

NSW

2100

Sagamihara-shi

Chatsworth,

CA91311

Ontario,

Canada

L4V1M5

Australia

Kanagawa,

Japan

U.S.A.

EUROPE

;

Marantz

Europe

S.A.

Marantz

France

Marantz

Audio

U.K.,

Ltd.

Marantz

Germany

GMBH

326

Avenue

Louise

Bte

32.

rue

Bernard

Palissy

193

London

Road

Max-Planck-Strasse

1050

Brussels

92600

Asnieres

Staines,

Middlesex

6072

Dreieich

Belgium

France United

Kingdom

West

Germany

Marantz

Belgium

Marantz

Svenska

A.B.

Marantz

Norske

A.S.

rue

Auguste

Van

Zande

Franzengatan

Refstadalleen

1080

Brussels

10425

Stockholm

Oslo

Belgium

Sweden

‘Norway

All

the

above

locations

are

fully

equipped

take

care

your

total

service

needs.

Because

various

countries

have

differing

configuration

requirements,

it is

necessary

that

you

contact

the

service

facility

your

particular

country.

the

event

that

there

service

location

listed

for

your

country,

please

contact

the

nearest

facility

for

the

necessary

assistance.

TABLE

CONTENTS

SECTION

PAGE

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BLOCK

DIAGRAM

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Rama

TEST

EQUIPMENT

REQUIRED

FORSERVICING

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ALIGNMENT

PROCEDURES

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5.1

Idling

Current

Alignment

Procedure...

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5.2

Power

Meter

Alignment

Procedure...

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DIAGRAM

AND

COMPONENT

LOCATIONS

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

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6.1

Main

Amp

Power

Supply

Assembly

(P700)

Schematic

Diagram

and

Component

Locations

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

6.2

Speaker

Switch

Assembly

(PS00)

Schematic

Diagram

and

Component

Locations

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

6.3

Headphone

Assembly

(PWO00)

Schematic

Diagram

and

Component

Locations

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

ores

6.4

Lamp

Assembly

(PZ00)

Schematic

Diagram

and

Component

Locations

.................c0ceeeuuees

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VOLTAGE.

CONVERSION

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TECHNICAL

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MODEL

SM500

STEREO

POWER

AMPLIFIER

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‘INTRODUCTION

This

service

manual

was

prepared

for

use

Authorized

Warranty

Stations

and

contains

service

information

for

the

Marantz

Model

SM500DC

Stereo

Power

Amplifier.

Servicing

information

and

voltage

data

included

this

manual

are

intended

for

use

knowledgeable

and

ex-

perienced

personnel

only.

All

instructions

should

read

carefully.

attempt

should

made

proceed

without

good

understanding

circuitry

operation.

The

parts

list

furnishes

complete

ordering

information.

Most

replacement

parts

should

ordered

from

the

Marantz

Company.

However,

simple

description

included

for

parts

which

can

obtained

locally.

BLOCK

DIAGRAM

FEEDBACK

NETWORK

POSITIVE

PREDRIVER

DRIVER

BIAS

CIRCUIT

DIFFERENTIAL

INPUT

NEGATIVE

PREDRIVER

DRIVER

SERVO

AMPLIFIER

REGIE

POSITIVE

LOAD

LINE

LIMITING

PROTECTION

CIRCUIT

NEGATIVE

P.W.

BOARDS

can

seen

from

the

circuit

diagram,

the

chassis

Model

SM500DC

consists

the

following

units.

Each

unit

mounted

printed

circuit

board

described

with-

the

square

enclosed

bold

dotted

line

the

circuit

diagram.

Main

Amp

Power

Supply............-

mounted

P.W.

Board

P700

Speaker

Switch.

...

mounted

P.W.

Board

PSOO

Head

Phone......

mounted

P.W.

Board

PWOO

Lamp..........

mounted

P.W.

Board

PZ00

POWER

METER

POSITIVE

CIRCUIT

POWER

SPEAKER

PROTECTION

RELAY

HEAD

RCHO——

PHONES

NEGATIVE

OWE,

SPEAKERS

SYSTEM

RCH

SPEAKER

SYSTEMS

SYSTEM

RCH

TEST

EQUIPMENT

REQUIRED

FOR

SERVICING

This

table

lists

the

test

equipment

required

for

servicing

for

the

Model

SM500DC

Stereo

Power

Amplifier.

Item

Manufacturer

and

Model

No.

Distortion

Analyzer

Audio

Oscillator

Voltmeter

Sound

Technology

Model

1700B

Use

Distortion

Measurements

Sinewave

and

squarewave

signal

source

voltage

measurements

(AC)

;

Tektronix

Model

T932

Oscilloscope

Philips

Model

3232

Circuit

Tester

Waveform

analysis

and

trouble

shooting

and

ASO

alignment

Trouble

shooting

Voltmeter

Fluke

Model

8000

“‘Digital’’

Simpson

Model

313,

Triplet

Model

801

Voltage

measurements

(DC)

Wattmeter

Simpson

Modei

1379

Monitors

primary

power

amplifier

Ammeter

Commercial!

Grade

Monitors

amplifier

output

under

short

circuit

condition

Line

Voltmeter

Simpson

Model

1359

Monitors

potential

primary

power

amplifier

Variable

Autotransformer

Superior

Electronic

Co.,

Powerstet

Model

116B-10A

Shorting

Plug

Output

Load

ohms,

+0.5%

100

Output

Load

ohms,

+0.5%

100

Use

phono

plug

with

600

ohm

across

center

and

shell

Commercial

Grade

Commercial

Grade

Adjusts

level

primary

power

amplifier

Shorts

amplifier

input

eliminate

noise

pickup

Provides

8-ohm

load

for

amplifier

output

termination

Provides

4-ohm

load

for

amplifier

output

termination

Output

Load

Capacitor

(0.5

mfd)

Mylar

Provides

capacitive

load

for

instability

checks

Power

Control

Box

Optional

Item.

Fabricate

accordance

with

Figure

Monitors

and

controls

primary

power

for

amplifier

Amplifier

Output

Load

Box

Optional

Item.

Fabricate

accordance

with

Figure

Provides

various

amplifier

loads

and

can

monitor

shorted

output

ALIGNMENT

PROCEDURES

5.1

Idling

Current

Alignment

Procedure

Where

adjusted:

R733

and

R734

Adjusted

value:

(20

ea.)

’

Procedure

With

the

input

the

set

placed

Open,

set

the

power

switch

ON.

Adjust

semi-fixed

resistance,

R733

and.

R734,

that

the

voltage

both

the

ends

R741

and

R742

may

become

after

seconds.

5.2

Power

Meter

Alignment

Procedure

Where

adjusted

Lchannelee-<

Gees

atk eee

Ga,

dee

eek

RX74

channelnns

sh.

SSNS

ees

tele

eees

RX08

Procedure

Connect

the

load

resistance

892

the

speaker

ter-

minal

the

set.

Connect

the

KHz

from

input.

Set

the

power

switch

the

set

ON,

increase

the

output,

and

adjust

the

speaker

output

be-

come

50W

—

822

(20V).

Adjust

RX07

and

RX08

that

the

meter

may

indi-

cate

50W

(82).

DIAGRAM

AND

COMPONENT

LOCATIONS

6.1

Main

Amp

Power

Supply

Assembly

(P700)

Schematic

Diagram

and

Component

Locations.

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6.2

Speaker

Switch

Assembly

(PS00)

Schematic

Diagram

and

Component

Locations

SSOl~1

Ssoi-2

6.3

Headphone

Assembly

(PW00)

Schematic

Diagram

and

Component

Locations

Pwoo

Ave

330(1W)

[Avr

330(1W)

6.4

Lamp

Assembly

(PZ060)

Schematic

Diagram

and

Component

Locations

eee

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EXPLODED

VIEW

AND

PARTS

LIST

[C01-99]

Front

Panel

002B

006B

011B

(U)

for

U.S.A.

(N)

for

Europe

(A)

for

Australia

(F)

for

Japan

1232063400

Front

Panel

Assembly

208H154060.|

Knob,

Push

Switch

123Z063410

Front

Panel

Assembly

51300306B0

P.H.

Tapped

Screw

P3x6

1232063010

Escutcheon,

Front

Panel

51300306B0

P.H.

Tapped

Screw

P3x6

1232063110

Escutcheon,

Front

Panel

403H067010

Cap

403H063020

Escutcheon

208H259010

Bushing,

Push

Switch

[C02-99]

Lid.

(Top

and

Bottom

Cover)

PART

NO.

208H257010

51260408Z0

51260408U0

2991259010

1232257010

403H057010

51280308B0

DESCRIPTION

Lid,

Top

Cover

B.T.

Screw

B4x8

B.T.

Screw

B4x8

Bushing

Lid,

Bottom

Cover

Leg

B.H.

Tapped

Screw

B3x8

PART

NO.

51280308B0

213H118020

213HO56020

2932861110

2578861010

e@(U)

for

U.S.A.

(N)

for

Europe

(A)

for

Australia

(F)

for

Japan

DESCRIPTION

B.H.

Tapped

Screw

B3x8

Spacer

Buffer

Label

Top

Cover

Label

Bottom

Cover

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