Marantz 3250b User manual

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MARANTZ

DESIGN

AND

SERVICE

Using

superior

design

and

selected

high

grade

components,

MARANTZ

Company

has

created

the

ultimate

in

stereo

sound.

Only

original

MARANTZ

parts

can

insure

that

your

MARANTZ

product

will

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

yourcall

immediately

refer

to

their

own

desk

top

com-

puter

terminal

and

can

quickly

determine

the

availability

and

price

information

you

require.

If

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

maii,

use

MARANTZ

parts

order

forms

which

are

available

from

our

National

Parts

Depot

located

at

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

be

supplied

to

eliminate

delays

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).

OWN

>

Direct

consumers

will

be

provided

with

the

current

retail

prive

quotation

on

available

parts

in

order

to

advise

themof

the

cost

of

the

parts

and

shipping.

OVERSEAS

PARTS

ORDERING

Parts

may

also

be

ordered

from

the

following

overseas

addresses:

CANADA

AUSTRALIA

JAPAN

Superscope

Canada,

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

L4V1M5

Australia

Kanagawa,

Japan

EUROPE

Superscope

Europe,

S.A.

.

Marantz

France

Marantz

Audio

U.K.

Ltd.

Superscope

GmbH

Avenue

Leopold

III,

2

Rue

Louis

Armand

9

London

Road,

203

Max-Planck-Strasse

22

7120

Peronnes-Lez-Binche

92600

Asnieres

Staines

D-6072

Dreieich

1

Belgium

Hauts-de-Seine

Middlesex

West

Germany

France

England

All

of

the

above

locations

are

fully

equipped

to

take

care

of

your

total

service

needs.

Because

various

countries

ha

differing

configuration

requirements,

it

is

necessary

that

you

contact

the

service

facility

in

your

particular

country.

In

theewent

that

there

is

no

service

location

listed

for

your

country,

please

contact

the

nearest

facility

for

the

necessary

assistance.

BRaena

weon

unl

za.

We

sound

better

a

’

——

TABLE

OF

CONTENTS

SECTION

1

INTRODUCTION:

cc

54

3453

feces

OE

ade

e

eee

e

aea

ee

2.

PW

BOARD

.........

Pree

wae

eee

ees

3.

TEST

EQUIPMENT

REQUIRED

FOR

SERVICING

eee

eer

ee ee

ree

ye

4.

ALIGNMENT

..........

oe

ee

eee

re

ee

te

ee

5

VOLTAGE

CONVERSION

FOR

EUROPE

..............scececeeeseeee

6

BLOCK

DIAGHAM.

2.22245

t2

bse

eae

ele

eee

TORE

ASR

eee

7.

SCHEMATIC

DIAGRAM

.......

Ser

eee

ee

eee

ee

8.

DIAGRAM

AND

COMPORNENT

LOCATIONS

oe

es

eee

ere

9.

10.

11.

12.

8.1

SPK/Headphone

Assembly

(PW01)

Schematic

Dagan

aii

Compenant

iaetion

8.2

Pre-Amp

Assembly

(PJ01)

Schematic

Diagram

and

Component

Locations

.....

8.3

Loudness

Control

(PF01)

Schematic

Diagram

and

Component

Locations

......

8.4

Fuse

Assembly

(PP01)

Schematic

Diagram

and

Component

Locations

........

8.5

Input

Terminal

(PV01)

Schematic

Diagram

and

Component

Locations

.......

8.6

Tone

Control

Filter

(PSO01)

Schematic

Diagram

and

Component

Locations

....

.

EXPLODED

MECHANICAL

DIAGRAM

..........

cc

ee

eee

9.1

Rear

Panel

for

Europe

only

.....-

2.0

cee

eee

ee

eee

tee

eee

PACKING

MATERIAL

EXPLODED

VIEW

.........

cee

eee

PARTS

LIST

.........

is

seve

tg

Petras

Bk

Sauna

eras

td

sd

eniaeaaes

Weare

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ain

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ae

TECHNICAL

SPECIFICATIONS

gic

de

eerste

hes

oe

Pa

eke one

ta

seat

ae

ete

PAGE

se

ee.

steed

satu,

02

tae

ae.

sanee

sae

sa

0

egal

0

ee

‘2x

5

..

10

sie

4

.-

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..

14

ae

10

wn

ae

nema

Been

we

EZ

2%

F

sigan?

Teta

he

Re

microphones

tone

mode

wreath

ric

1.

INTRODUCTION

2.

P.W.

BOARD

This

service

manual

was

prepared

for

use

by

Authorized

As

can

be

seen

from

the

circuit

diagram,

the

chassis

of

Warranty

Stations

and

contains

service

information

for

Modei

32508

consists

of

following

units.

Each

unit

Marantz

Model

3250B

Stereo

Control

Console.

|

mounted

on

a

printed

circuit

board

is

described

within

the

Servicing

information

and

voltage

data

included

in

this

square

enclosed

by

a

bold

dotted

line

on

the

circuit

manual

are

intended

for

use

by

knowledgeable

and

diagram.

experienced

personnel

only.

All

instructions

should

be

read

carefully.

No

attempt

should

be

made

to

proceed

1.

Tome-Amp.,

ASS'Y

......ccccecceccsssensecneees

mounted

on

P.W.B.PJ

01

without

a

good

understanding

of

circuitry

operation.

2.

Tone

Control,

Filter

Ass’y

.....csee

mounted

on

PW.B.

PS 01

The

parts

list

furnishes

complete

ordering

information.

3.

Input

Terminal

Ass’y

.........ccesseceeees

mounted

on

P.W.B.

PV01

Most

replacement

parts

should

be

ordered

from

the

4.

Speaker/Headphone

Ass’y

.............4

mounted

on

P.W

.B.

PWO1

Marantz

Company.

However,

a

simple

description

is

Buse

ASS

V

eisccadin

tics

cvnde

doa

evnenssnvanseaans

mounted

on

PW

.B.

PP

01

included

for

parts

which

can

be

obtained

locally.

6.

Loudness

Control

ASs’y

«...esesesesees

mounted

on

P.W.B.

PF

01

3.

TEST

EQUIPMENT

REQUIRED

FOR

SERVICING

Table

1

lists

the

test

equipment

required

for

servicing

the

Model

3250B

Stereo

Control

Console.

Distortion

Analyzer

Distortion

measurements

Audio

Oscillator

Sinewave

and

swuarewave

signal

source

AC

VTVM

Voltage

measurements

(AC)

Sound

Technology

Model

1700B

Tektronix

Model

T932

Philips

Mode!

3232

Oscilloscope

Waveform

analysis

and

trouble

shooting

Trouble

shooting

Circuit

Tester

Fluke

Model

8000

‘‘Digital’’

Simpson

Model

313,

Triplet

Model

801

Simpson

Model

1379

DC

VTVM

Voltage

measurements

(DC)

Monitors

primary

power

to

amplifier

M

AC

Wattmeter

onitors

amplifier

output

under

short

Circuit

condition

AC

Ammeter

Commercial

Grade

(1-10A)

Monitors

potential

of

primary

power

to

amplifier

Line

Voltmeter

Simpson

Model

1359

Adjusts

level

of

primary

power

to

amplifier

Superior

Electronic

Co.,

Powerstat

Mode!

116B

—10A

Use

phono

plug

with

600

ohm

across

center

and

shell

Variable

Autotransformer

Shorts

amplifier

input

to

eliminate

noise

Shorting

Plug

pickup

4.

ALIGNMENT

PROCEDURES

1.

Setthe

VOLUME

control

at

maximum,

and

also

BASS,

:

SIGNAL

INDICATOR

MID,

TREBLE

and

BALANCE

Controls

at

mechanical

APPLICATION

CONNECTION

center

position.

|

CHECK

OF

THE

PHONO,

AUX,

TAPE

OUT,

2.

Connect

47

k&§2

dummy

load

resistor

to

each

R

and

L

TECHNICAL

SPEC.

TAPE

PRE

OUT

channe!

on

PRE

OUT

jacks

of

the

unit.

5.

VOLTAGE

CONVERSION

@

EUROPEAN

MODEL

ONLY

This

Model

is

equipped

with

a

universal

power

transform-

er

to

permit

operation

at

110,

120,

220

and

240V

AC

CAUTION

50/60

Hz.

P

,

DISCONNECT

POWER

SUPPLY

CORD

FROM

AC

To

convert

the

unit

to

the

required

voltage,

set

the

plug

as

OUTLET

BEFORE

CONVERTING

VOLTAGE.

iHustrated

so

that

you

can

adjust

the

voltage

as

required.

For

110V

Operation

For

120V

Operation

For

220V

Operation

For

240V

Operation

FROM

RIGHT

CHANNEL

-.

PHONO/

MIC

TO

RIGHT

CHANNEL

WYHOVIC

490718

9

AMP

x9

AMP

_

TONE

AMP

~

PHONO

EQUALIZATION

N

6

|

=

Mic

TURNOVER

EQUALIZATION

CIRCUIT

MIC

TAPE

,

MONITOR

,

ciipwiaee

'

O!

Fe

Fs

1N

O

/

O

A

d

:

’

1|¥

out

OuT

|

100

Hz

10

kHz

©)

)

TONE

Low

HIGH

LOUDNESS

DEFEAT

FILTER FILTER

nN

CONTOUR

IN

O

a

eee

:

Pdiy

vd

al

TAPE

1

MONITOR

IN

((_}

A

CIRCUIT

O

TAPE

COPY

O

OUT

:

TIN

\

a

MUTING

BALANCE

LOUDNESS

VOLUME

t

v

OUT

TAPE

1

MONITOR

OUT

(O}

CONTOUR

=

TAPE

2

MONITOR

IN

(Q)

LOW

FILTER

HIGH

FILTER

STEREO

CIRCUIT

AMP

.

REVERSE

L

+R

TAPE

2

MONITOR

OUT

S

L

15

Hz

18

dB/Oct.

9

kHz

18

dB/Oct.

R

MODE

FROM

RCH.

SYSTEM

1

SYSTEM

2

PHONO

=

ae

au

OFF

SOURCE

TUNER

rf

n

Mie

1+2

2+1

er

oe

:

Mc

AUX

ON

y

SELECTOR

TAPE

COPY

TAPE

MONITOR

mat

J

OFF

PRE

OUT

2

SPEAKERS

1-SYSTEM-2

Figure

10.

Functional

Block

Diagram

7.

SCHEMATIC

DIAGRAM

Q451,0452

2SKK7

PJOI

PRE

AMP

ASSY.

Q453

280330

Q401~

Q404

2SA970

0405,0406

25C2240

Q407,0408

1S2471

QEOI~

QE04

2SA94I

QE05,QE06,

QE!

1,

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2SC2088

QHOI~QHO4

25C2088

QHO5,QHOG

2

J

Me

i

4

a

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a

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4.7

R457

2k

PHONO

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|

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PREOUT

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$J01

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6.8%

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SELECTOR

TAPE

COPY

TAPE

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QNO!

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QNO2

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WZ071

Q808

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RFOS-4

100k

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MODE

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RS28

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CSIG

100p

Model

3250B

—

SA94]

RH27

!.8k

8.

DIAGRAM

AND

COMPORNENT

LOCATIONS

8.2

Pre-Amp

Assembly

(PJ01)

Schematic

Diagram

and

Component

Locations

COREE

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oi22

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8.1

SPK/Headphone

Assembly

Oise

OsTi9

(PW01)

Schematic

Diagram

and

=

Component

Locations

C4i7

1

R427

R425

8..2k

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JJIS

JJt4

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Marantz 3250B User manual

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