Marantz 4270 Owners Manual

Model

4270

Stereo

~

MARANTZ

A WHOLLY·OWNED SUBSIDIARY OF SUPERSCOPE INC., SUN VALLEY, CALIFORNIA 91352

CO.,

INC.·P.O

. BOX

99·SUN

R

VALLEY,

CALIFORNIA·91352

2+

Quadradial

Receiver

4

WA

R A

All parts of MARAN TZ
guaranteed for a period
date

of purchase, exce
guaranteed for NINETY DAYS fr o m
purchase,
produ
electron
period of
the cab inetry Is guara

defects on ly, for a period of TWO
dat

necessary
charge during the above sta ted periods. T he
conditions of th is Warranty, and the
responsibilitY
under this War;anty,

an

the original, registered

transmitted
Box 99 , Su n Valley, California 91 352, not later
than

are
MARANTZ Service

product
COMPANY, INC., or
Serv

prepaid.
shipped in its original pack age. No accessories
should
accessories are s
MARANTZ COMPANY, INC. shall have no
liability whatsoever for loss of
such accessories,

purchase was made wit hin the United States of
America.

shipme nt is made by
MARANTZ Service
the
parts exchange are
Warranty , MARAN TZ COMPANY. INC. will
prepay return shi pping charges, pr ovided t hat such
return
located

and

except

cts are guaranteed .as f

ic

compo

THRE

e of pu rchase.

In

the

par

1,

The

authorized

2,

The

The

3.
to

TEN DAYS

4.

The

effected

iceStet

6. This Warranty shall be valid only if

United

by

5. If it becomes necessary to

or

ion, all shipping charges must be fullv

If

the

be shipped

The

Stat

shipment is to be mad e
wit

hin the

for

nents are fully

E YEARS from

ntee

event

that

ts and labo r will be furnis hed free of

of

MARA NTZ COMPANY, INC.

are

purchase must have

MARANTZ dealer.

Warranty

owner

Warranty Registration Card must be

MARAN

Warranty will

any

ent

IZ

from

date

anyone

Station.

defective part to MARANTZ

to

ire inst

with

hipp

ed with the

nor

for

Warr

anty

Station

es.

If

the

within

United

produ

of

THREE

pt

for

spe

aker products.

ollow

d against

service is requ ired, all

as follows:

extends

of the p rod uct.

COMPANY, INC., P. O.

of purchase. .

become

other

an

aut

rume

the

the

safe-return th ereof.

shall not appl y unless
the

from

requested

States.

cts are fully

YEARS

tubes

which are

date

s: all speaker and
guaranteed

date

only

than

horized MARANTZ

nt is

prod uct. If

or

pur

the t

Speaker

of purchase;

manufacturing

YEARS

exte

nt

been

made

in favor of

void if repairs

an

authorized

send

sent,

it

must

product.

damage to any

chaser to the

a point within

repairs and/or
erm

s of this

to

an address

from

for a

from

of the

from

this

be

any

the

of

7. This
Nunt>er has been
W

arranty

been

co

nnec ted or operated in

ctions

instru
INC. This Warrant y shall a lso be void if the

prod

uct
which MARANTZ COMPANY, INC. believes has
affected

8. MARANTZ COMPANY, INC. shall have
no liability whatsoever for co nseq uential da mages.
The sole responsibility of MARANTZ COMPANY,

under

INC.
repair of the prod

the sole discret ion of MARANTZ COMPA NY,
INC.

9. This Wa

furnishings of labor or par ts for user mainte nance,
as the same is described in the instructi on

handbook

or

10. This Warranty is valid only

to

repairs effected by an au t hor ized MARA NTZ

Station

Service

11.

APPLICABLE
DISCLAIMER OF WARRANTY,
IMPLI
MERCHANTABILITY OR FITNESS WITH
RESPECT TO THIS PRODUCT, NOR ARE
THERE
EXTEND BEYOND THE PROVISIONS OF

THIS

WA RR ANTY.
CHEC K·UPS AR E
WARRANTY .

12

. MARANTZ COMPANY, INC. reserves
the right to
i

mprovements
obligat ion to include these changes in any
products

TO

THIS WARRANTY.

WARRANTY

MARANTZ COMPANY, INC., P.O. BOX 99,

SUN VALLEY,

LATER THAN TEN DAYS FOLLOWING THE

DATE OF PURCHASE.

Warranty

shall

not

furnished by MARANTZ COMPANY,
has been
the

EXCEPT TO THE

ANY O

theretofore

PROTECT

altered

stability

this Warranty sha ll

rranty

furnished with this pro

.

ED

THER

make

upo n its

REGISTRATION

CALIFORNIA

is void if

altered

apply

or

uct,

LAW

WARRANTY

NOT

chariges .ln design

manufac

YOUR RIGHTS

FILL

or removed. Thi s

if

the

product

accordance

or repaired in any way

reliability of

or replacement thereo f ,in

does

WARRANTIES WHICH

ORDINAR

INCLUDED IN

prod

t ured.

OUT AND MAIL

the

be

limited to

not include the

duct,

with

EXTENT

PRECLUDES

THERE

Y PERIODIC

ucts without

CARD

91352

the

Serial

has

not

with the

product.

the

manu

respect

THAT

IS NO

O F

THIS

and/or

any

UNDER

THE

TO

, NOT

al

A

PURCHASE

'S

Should there be any questions, please

contact

the

Marantz National Service Manager, Marantz Company, Inc.

P.O. Box 99, Sun Valley, California

91352

REGISTRATION FOR

Model: Marantz Model

Serial No. _

Purchaser's Name _

Purchased From (Name) _
Address _

RECD

0

~

Price Paid

$

------

Date Warranty Reply Card Mailed _

The above information becomes
a valuable purchase. It should be promptly filled in at the
same

time

that

you fill in and mail
reply card to Marantz. This information provides a valuable
insurance record and must also be referred to should you
have any correspondence with Marantz.

MARANTZ

3-YEAR

WARRANTY

4270

Date Purchased - _

your

permanent record of

the

warranty registration

GOLDEN

TABLE

Connecting the 4270

Source Devices

Remote Speakers
Speaker Phasing
Speaker Placement

Front

Panel Features
Mode Switch
Dimension

SQ Decoder
Balance Controls
Selector Switch
Bass,

Mid
Monitor
Monitor
Main and Remote Spkr Switches
Power Switch
Front

and Rear Phones Jacks

Loudness

Filter

Hi

Tuning Meter
Tuning
FM Muting Switch
Volume
Dolby
Record Level
Play Cal.

400Hz Tone Switch

OF

and Treble Controls

Switch

Switch

Switch

Switch

(L)

(R)

CONT

for

Tape 1!Tape 2

for

Tape/Source

(L)

(R)

EN

TS

10
10
10
10
10

10

8

9

9

9
9

9

9
9

8
8

8

8
8
8

2
4
4

5

5

7
7

External Decoder Connection

Tape Recording

Basic

Dolby

Dolby

Procedure
Procedure
Use
Broadcasts
FM De-Emphasis Switch
Dolby

Technical Description

General

Functional Description

Frond End
IF

Stages

Limiter
FM Stereo Demodulator
Muting
AM Tuner
Phono
Selector Switch
Monitor
Monitor

Tone Control
Power

General Requirements
Installation
Service Notes

Process

Calibration

for

Playback Calibration

for

Record Calibration

of

the

Dolby

Mode Chart

Circuit

Amplifiers

(Tape/Source) Switch
(Tape 1 or 2) Switch

Amplifier

of

System on FM

Walnut Cabinet

13
13

14
14
14

15

16
16
16

18

18
18
18
18
18
18
18
18

19
19

19
19
19
19

19

20

20

Rear

Panel

Features

Phono Jacks

AUX

CD-4/
Tape
Out

Jacks
FM Antenna Terminals
AM Antenna Terminal
FM Quadradial
FM De-Emphasis Switch
Dolby
Muting Level Control 12

Power Mode Switch 12
Pre Out, Main In Jacks 12
Connecting an External

Rear Channels 12
Connecting an External
Front
Chassis
Main and Remote Speakers

Connection
AC Convenience Outlets
Remote Control

Jacks

Monitor

FM Preset Level Controls 12

Channels

Ground Binding Post

In and Tape

Output

to

AC

Outlet

Monitor

Jack 12

Amplifier

Amplifier

for

for

11

11

11

11

11

11

12

12
12
12

13
13
13

LIST F

1. Rear Panel Connection
Facilities and Adjustments 2

2. Loudspeaker System Connections 3

3. Connection Diagram 4

4. Speaker Placement 6

5. Mono Mode Sound Dispersion 7

6. 2-channel Mode Sound Dispersion 7

7. Discrete Mode Sound Dispersion 7

8. Vari-Matrix Mode Sound Dispersion 7

9.

Front

10. Stereophone Plug 9

11.

FM/AM

12. AM Ferrite-rod Antenna 11

13. Quick-Connect Speaker Terminal 13

14. Block Diagram 17

15. Packing Instructions 20

1.

Dolby

ILL

USTRA

Panel

Controls and Jacks 8

Antenna Connections 11

TABLE

Mode Chart 16

TI

ONS

GEN

ERA

L D

ESCRIPTION

FORE

WO

RD

Your

Marantz Model

2 + Quadradial 4 Receiver developed
a name famous
ponent industry. The Model
Marantz' exclusive

ulates 4-channel sound
stereo programs, and is capable
4-channel sound
The

4270
channel program as well as regular stereo and
monaural programs. An optional plug-in decoder
adapts the
such as Columbia's SQ.

The FM
RF amp and

employs ceramic filters
high selectivity
unparalleled interference-free operation. The
4270

incorporates a switchable 2-channel
system
music

The FM
loop

Stereo-Monaural
stereo
obtain
for

19KHz
Moreover,
cuit

that

by completely eliminating inter-station inter-

ference which is usually generated at
selecting FM stations.

will

4270

tuner

Mixer

to

reduce noise, inherent in recording

from

records, tape, FM broadcasts and

multiplex

indicator

output

at

and

the

Model

permits pleasant FM broadcast reception

4270

is a high-quality Stereo

by

Marantz,

for

quality

Vari-Matrix

from

any matrix-encoded source.

also reproduce any discrete 4-

for

any specific

section employs an FET

stage.

to

provide high sensitivity and

circuitry

Automatic

circuit

low

38KHz

and a

impedance.

rejection are incorporated.

4270

in

the

audio com-

4270

incorporates

circuit

from

normal 2-channel

The IF

of

wide

includes a phase locked

switching

buffer

unit

has a

which

of

reproducing

matrix

tuning

bandwidth

Low

system

for

DOLBY

circuit,

amplifier

pass

muting

the

time

circuit

filters

sim-

the

and

TV.

to

cir-

of

To obtain
from
tions carefully.
tions

The manual is divided
covers installation and operation in simple, non­technical language. The second describes the
Model 4270 in more detail
cations and

For
connections, references are printed in bold face
type.

opt

imum

the Model 4270, please study these instruc-

to

obtain

functional

quick

identification

performance and

Follow

maximum

into

explanations.

enjoyment

the step-by-step instruc-

performance.

two

parts. The

with

technical specifi-

of

the controls and

first

AFT

It
to
or ship the Receiver (refer
ing instructions).
4270
It
tion
factory
unit
Only
the carrier
ever, the Marantz Company
in such an event. Save

evidence

ER

is advisable

prevent damage shouId you wish

carefully

has undergone stringent

and tests

in perfect operating

is damaged,

the consignee may

for

UNPAC

to

save

all original packing material

to

Please

for

any signs

quality

prior

for

damage during shipment. How-

inspection by the carrier.

notify

to

packing, and

the carrier

institute

the

KI

NG

to

transport

Figure 15

inspect

of

damage in transit.

condition. If

will

co-operate

damaged carton as

for

your

control

without

a claim

pack-

Model

inspec-

left

delay.

the
the

with

fully

Figure

1.

Rear

Panel

Connection

Facilities

and

Adjustments

CONNECTING

The

4270

Receiver. When using

the

POWER MODE Switch on

should be placed in

can be used as a stereo or 4-channel

THE

the

4270

the

70Wx2 mode.

4270

as a stereo unit,

the

rear panel

The

instructions contained in this manual are to be

for

both

followed
however, for stereo operation,

stereo or 4-channel operation;

the

front

channels

alone will apply.

1. Using a balanced and shielded
connect

an FM

antenna

to

the

300

Ohm cable,

4270

as shown

in Figure 11.

2. Using No. 18,
connect

LEFT

FRONT

- or

GND

or

COMM
+ or

RIGHT

- or

COMM

+ or

LEFT

or 0

HOT

FRONT

GND

or 0

HOT

REAR

or

or

or

or

heavier, lamp cord (zip cord),

main speakers

SPEAKER

NEG

or

POS

or 1

SPEAKER

NEG

or

POS

or 1

SPEAKER

to

the

4270

4270

to MAIN

FRONT

to MAIN

FRONT

4270

to MAIN

FRONT

to MAIN

FRONT

4270

as follows:

SPEAKERS

L-

SPEAKERS

L+

SPEAKERS

R-

SPEAKERS

R+

RIGHT

- or
COMM

+ or

CAUTION: When using

REAR

GND

or 0

HOT

or

or

NEG

POS

mode,

SPEAKER

or

or 1

do

4270

to MAIN

REAR

to MAIN

REAR

the

4270

in

the

not

use 4 Ohm speakers -

SPEAKERS

R-

SPEAKERS

R+

70 W x 2

use 8 Ohms or higher.

3. Using shielded

connect

your

audio

cables with

record player

to

phono

the

4270

follows:

RECORD

LEFT
RIGHT

PLAYER

OUTPUT

OUTPUT

4270
to

PHONO
PHONO

to

4. If a discrete 4-channel playback device
cartridge player, 4-channel reel-to-reel player,
CD-4 discrete disc demodulator, etc.), is to be
engaged in

tween
audio

DISCRETE

PLAYBACK

LEFT-FRONT

CHANNEL

LEFT

·REAR

CHANNEL

the

the

device and

cables with

4·CHANNEL

DEVICE

or LF or

1 or

TRACK

or

LR

or

2 or

TRACK

system, make connections be-

the

4270

using shielded

phono

plugs.

4270

1

to

2 to

FRONT

REAR

CD·4/AUX

CD-4/AUX

plugs,

as

L
R

(0-8

L

L

- or

GND

COMM

+ or

HOT

or 0

or

or

NEG

POS

or

or 1

to MAIN

REAR

to MAIN

REAR

SPEAKERS

L-

PSEAKERS

L+

RIGHT-FRONT

CHANNEL

RIGHT-REAR

CHANNEL

3 or

4 or

or

RF

TRACK

or

RR

TRACK

or

or

3

4

to

FRONT CD·4/AUX R

to

REAR

CD-4/AUX

R

2

I

5. Using shielded audio cables with
connect a discrete 4-channel
the

4270

as follows:

tape

phono

recorder

plugs,

to

LEFT

Figure

2.

Loudspeaker

RIGHT-REAR
or LINE IN to

INPUT

TOR

REAR

SPEAKER

SySTEM

AS FOR FRONT sPEAKER SYSTEM

System

REAR

OUT

R{PEAT

Connections

TAPE

R

WIRIN

G

MONI-

II

II

DISCRETE

TAPE

LEFT-FRONT

or LINE

LEFT-REAR
or

LINE

RIGHT-FRONT

or

LINE

RIGHT-REAR
or

LINE

LEFT-FROIH
or LINE IN

LEFT-REAR

to

LINE

4-CHANNEL

RECORDER

OUT

OUTPUT

OUT

OUT

OUT

INPUT

IN

OUTPUT

OUTPUT

OUTPUT

INPUT

4270

to

FRONT

TOR

to

REAR

TOR

to

FRONT

TOR

to

REAR

TOR

to

FRONT

TOR

REAR

to
TOR

IN L

IN L

IN R

IN R

OUT

OUT

TAPE

TAPE

TAPE

TAPE

TAPE

L

TAPE

L

MONI-

MONI-

MONI·

MONI-

MONI-

MONI-

6. Pull

the

in Figure 12.

Set

the

7.

FRONT
REAR

FROI\lT·REAR
MODE
DIMENSION
BASS
VOLUME

MAIN
REMOTE
FM

MUTING
MONITOR
HI

FILTER
LOUDNESS
DOLBY

400Hz
POWER

8. Plug

9. Turn

controls and switches as follows:

L-R

L-R

BALANCE

and

TREBLE

SPKR

SPKR

(TAPE/SOURCE)

TONE

the

the

AM ferrite-rod antenna

position

BALANCE

BALANCE

Controls

Mid
Mid

position

Mid

position

VARI·MATRIX

position

Mid
Mid

position

Minimum
ON

(in)

OFF

(out)

ON

(in)

SOURCE
OFF

(out)

OFF

(out)

OFF

OFF

(out)

OFF

(out)

4270

into

the

AC wall outlet.

POWER Switch ON.

out

as shown

(fully

counter-

clockwise)

(out)

RIGHT-FRONT

or

LINE

IN to

3

INPUT

FRONT

TOR

OUT

TAPE

R

MONI-

10. Select
the

SELECTOR Switch

tion.

the

desired program source by setting

to

appropriate posi-

11. If

12. Increase

Your
operative, and
ous controls to discover

The remainder
your

SOURCE DEVICES

2-channel
A stereo record player may be
PHONO jacks.

High level 2-channel playback devices (tuner,
tape
level

FRONT TAPE MONITOR and CD·4/AUX IN­PUTS.

phono

If FM is selected,

able listening level.

complete

system most effectively.

player, record player with equalized high

output,

is selected,

the

VOLUME control to a comfort-

4-channel

you

may

of

this manual explains

etc.) may be connected

put

on a stereo record.

tune

to

a stereo broadcast.

or

stereo system is

experiment

their

effects.

connected

with

how

the

to

to

now

vari-

to

use

the

the

4-channel

Discrete 4-channel playback devices (0-8 cartridge

player, 4-channel reel-to-reel player, CD-4 discrete
disc demodulator, etc.) may be connected to
CD-4/AUX, TAPE MONITOR 1 or TAPE MONI-

input

TOR 2

REMOTE SPEAKERS

The

4270
remote speaker systems. A second group of
four

speakers may be set up in
Connect these
MOTE SPEAKERS terminals as you did
main speakers.
The

MAIN

front

panel now permit activation of MAIN

or REMOTE groups of loudspeakers.

NOTE: Do

jacks.

can

accommodate

four

remote speakers

and

REMOTE SPKR Switches on

not

use

4-0hm
remote
neously. Use 8- or

speakers are

both main and

another

to

speakers if main

to

be used simulta-

16-0hm

speakers only.

room.

the

the

RE-

the

the

and/

and

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2·CHANNEL

TAPE RECORDER

2·CH TAPE

RECOR.DE~

MAT8 £

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T

CONNECTED TO THE

,o\HD RIGH T CHANNEL TER M.lMAlS

TAPE t

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!SJ

4·CHANNEL

TAPE RECOROER

TAPE 2

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4·CHANNEL

TAPE DECK

lUT

1D00

ISJOo

.

EB

I

I

I

I

I FRONT

RIGHT

REAR

I

lEFT
REAR

RIGHT

IFRONT

LEF

f RONT

RIGHT

IREAR

LEFT

REAR

RIGHT

OUTPUT

®l

RECORD PlAYER

a

2-CHANNEL

8

.TRAC~

TAPE PLAYER

0.8

PlAYER

1SJ

ISJ

4-CHANNEL

TAPE PLAYER

CO·..

DEMODULATOR

I

~~

LD

'000

TAPE

rs:300

IS:l

00

00

'I

1001SJ

IDI

2·C"1DEVICi. MAYBE

TO THE fRONT LEFT AND RIGHT

CHANNEL

?!

1S300

2·CHANNEL

TAP1:

PLAYER

TERMINAlS

CONNECTED

10

I,

FRONT

LEFT

FRONT

RIGHT

REAR

I

T

LEFT

@l

REAR

r RIGHT

~

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00

Figure

3.

Connection

Diagram

4