Marantz 2270 Owners Manual

II

--

II

MARANTZ

A WHOLLY-OWNED

CO., INC. ' P.O. BOX

SUBSIDIARY

OF SUPERSCOPE INC., SUN VALLEY,

.....

_ R

99·

SUN VALLEY,

Model

2210

Stereop.honic

Receiver

CALIFORNIA'

91352

CALIFORNIA

91352

~RRAN

,.A

II gU!Jranteed for date guaranteed for NINETY DAYS from date of purchase, products are guaranteed as follows: all speaker elec period of THREE y EARS from dat e of purchase; the cabinetry is guara defects only, for a period of TWO YEARS date of purchase.

necessary parts and la charge during the conditions of this Warranty,-and the extent of t he responsibility of MARANTZ COMPANY, INC. un

an auth or ized MARANTZ dealer,

the.original, registered owner of the,

transmitted to MARANTZ COMPANY, INC., P. O.

Box 99 , Sun Valtev, California

than TEN DAYS from

are effected by .anvone MARAI'JTZService

product COMPANY, INC., or to an authorized MARANTZ Service prepaid. shipped in its original package. No accessories shou ld be shipped with the .product. If any accessories are shipped with the MARANTZ COMPANY, INC. shall have no liability whatsoever for loss of or damage to any

such

purchase was. made within the United States of America. The Warranty shall shipme nt is made by the pu rchaser to MARANTZ Service the United States. If t he requested repairs parts exchange are within the terms of this Warranty, MARANTZ COMPANY, INC. will prepay return shipp ing charges, provi ded that such retu rn located within

parts of MARANTZ

a.peric

of 'purchase, except for tubes Which are

andexcept

tro

nic compo nents are fully guaranteed for a

In th e event th at service is req uired, all

der

this Warranty, are as follows:

1. The purchase must have been made from

2. The Warranty extends only in favor of

3. The Warranty Registration Card must be

4. The Warranty will

5. If it becomes necessary to send th is or any defective part to MARANTZ

Statio

n, all .shipping charges

If

the

~cessor i es

6. This Warranty shall

shipment

the

d of THREE YEARS from

for speaker products. Speaker

nteed

bor

abo

date

Station.

ent

ire instrument is sent, it

,

nor for the safe return thereof.

Station

is to be made United States.

Marantz National Service Manager, Marantz Company, Inc.

products

against manufacturing

"will be furnished free of

ve stated periods. The

of purchase.

become

other

than an authorized

be valid only if t he

not

from a

Should

P.O

are fully

and

from

prod

uct.

91352, not

void if repairs

must

apply unless

point

to

later

be fully mustbe

product,

the

within

andlor

an address

there be any questions, please

. Box 99, Sun Valley, Califo rnia

7. This Warranty is void if the Serial Numbe r has been altered or remo iied. This Warranty shall not .apply ' if the prod u been c

onn

ected or operated in acco rdance with the

uct

ions furn ished by MARANTZ COMPANY,

instr INC. This Warra product has been altered or repaired in any way which MARANTZ COMPANY, INC. be lieves has

..

affected

no liability whatsoever for consequential damages: The sole responsibility of MARANTZ

INC. repair of the

the sole discretion of MARANTZ COMPANY,

INC.

furnishings of labor or par ts for use as the same is described in or

to repairs effec ted by an Service Station.

APPLICABLE DISCLAIMER OF WARRANTY, THERE IS NO IMPLIED

MERCHANTABI LITY O R FITNESS WITH

RESPECT TO THIS PRODUCT, NOR ARE

THERE ANY OTHER WARRANTIES WHICH EXTEND BEYOND THE PROVISIONS OF

THIS WARRANTY; ORDINARY PER IODIC CHECK·UPS ARE NOT INCLUDED IN THIS WARRANTY.

the right to make chaf)ges in design improvements, upon its products without any obligation to include these changes in any products theretofore manu factured.

THIS WARRANTY , F ILL OUT AND MAIL THE WARRANTY REGISTRATION

MARANTZ COMPANY, INC., P.O. BOX

'SUN VALLEY, CALIF ORNIA 91352, NOT

LATER THAN TEN DAYS FOLLOWING THE DATE OF

the

8. MARANTZ COMPANY, INC. shall have

under

9. This Warranty does n

handbook

10. This Warr

11 . EXCEPT TO THE EXTENT THAT

12 . MARANTZ COMPANY, INC. reserves

TO PROTECT YOUR RIGHTS U.NDEFI

contact

nty

shall also be void if the

.stability or reliability of t he

this Warran ty shall be limited to 'the

product

, or .replecernent the reof, in

furnished with't his

PURCHASE

the

anty

is valid onl y with respect

aut

horized MARANTZ

LAW, PRECLUDES A

WAR RAN

the

9

1~52

ot

rrnain

ins

truc

product.

T Y O F

CARD TO

ct

has not

prod

uct.

COMPANY"

include the

tenance,

tion

manual

andlor

99,

PU

C

ASER'S

RECORD

~

REGISTRATION FOR

MARANTZ

3-YEAR GOLDEN

WARRANTY

Model: Marantz Model

2270

Serial No. _

Purchaser's Name _

Purchased From (Name) _ Address _

Price Paid

$ _

Date Purchased _

Date Warranty Reply Card Mailed _

your

The above information becomes

a valuable purchase. It should

time

that

you

same

reply card

to

insurance record and

have any correspondence

fill in and mail

Marantz. This

must

with

information

also be referred to should you

Marantz.

permanent

be

promptly

the

warranty registration

provides a valuable

record of

filled in at the

TABLE

Preparation

Rear

Panel Phono 1 Play 2

Record 1 Auxiliary Quadradial 3 Main In and Pre

Loudspeaker Systems 3 FM Antenna 4 Antenna AM Antenna 5 Connection Convenience Outlet 5 Simplif Tuning Meters 6 Tuning 6 FM Antenna Orientation 6 Mono In (L, R) Switch 6 Tape/Source

Loudness Switch 6 Hi-Blend Switch 6

Low

Filter

Hi Muting Switch and Level Control 7

OF

for

Connections 2

& 2 2

Attenuator

to

ied Operating Procedure 5

Switch 7

CONTENTS

Use 2

Out

AC

Outlet

Monitor

Switch 6

2 3

5 5

Selector Switch 12 Tape Signals 12 Monitor Monitor Phono Signals 12 Hi Blend and Mono (L and R) Functions 12 Control Circuits 12 Balance Control 12 Volume

Tone

Hi-Low

Output Technical Specifications 18 Service Notes 19

(Tape/Source) Switch 12 (1 and 2) Switch 12

Control 13

Amplifier

Filters 13

Stage and Protective Circuits 13

13

Main Controls and Switches

Sel

ector Switch Balance Control Volume Control

Bass

Mid and Treb le Controls

Main-Spkr-Remote Switch

Front

Panel Jacks 8 Dubbing Out 8 Dubbing In 8 Stereophones 8 Some Suggestion on Using Tape Recorders with

Your

Model 2270 8 Recording and Playback 8 Recording 9

Playback 9 Making

Recording a Long-Duration Program 9

Copying and Editing 9

Technical Description 10

General 10

Front

FM IF

Multipath Indicator 11

FM Stereo Demodulator 11 Muting Circuit 11 AM Tuner 12

Two

Recordings Simultaneously 9

End 11

Amplifier

7 7 7 7

8 8

11

LIST

1. Rear

2. Loudspeaker System Connections 3

3.

4. AM Ferrite-rod Antenna 5

5.

6. Stereophone Plug 8

7. General Arrangement

8. Functional Block Diagram 10

9. Phono Equalization Characteristics 14

10. Tone Control Characteristics 14

11. Low and High

12. FM Characteristics 15

13. Stereo Separation 16

14. Harmonic Distortion 16

15. Frequency

16. Packing Instructions 19

OF

Pane

~ustme~

FM/

AM Antenna Connect ion 4

Front

Panel Controls and Jacks 7

ILLUSTRATIONS

l Connection Facilities and

of

Tape Recorder 9

Filter

Characteristics 15

Response

2

17

GE

Your incorporates Marantz is famous in dustry. Unparalled technology and innovation made possible this combination of sections on a single chassis : and Power Amplifier. Internal these formance from each section, and retain flexibility of separate ordinary flexibility of the

headphones; a additional sound source. Record, playback, and copying capabilities are included for a tape playback deck or

E

AL

Marantz Model

the

component

connection of:

tuner

two

recorders.

OESC

2270

all solid

advanced circuitry for which

the

audio

three

sections ensure

components. The

your

two

stereo pairs of loudspeakers,

turntable

(such as SW or

or

PTON

state

receiver

component

superb

Tuner,

connect

Model

record changer; an

component

Preamplifier,

ions between

optimum

the

2270

permits

LW)

and a TV

per-

full

extra-

in-

F

For your these instructions carefully . Installation and operation are features deserve

its This manual is divided into covers installation and operation in simple, nontechnical language. in more detail with technical specifications, functional explanations, and special application discussions. For nections, references face and rear panels of

EWORO

optimum

Model

controls

quick

type,

performance and enjoyment from

2270

not

complicated,

and

connect

identification of

exactly as

Stereo

your

The

to

your

Receiver , please study

but

becoming familiar with

ions.

second describes

them

they

Receiver.

its flexibility and

two

parts. The first

the

controls and con-

are printed in bold-

appear on

the

2270

front

1

AFTER

It is advisable to

prevent damage should you wish or ship instruct ions). Please inspect

any signs of damage in transit. It has undergone stringent quality control inspection and tests prior to packing, and left condition

If

delay. Only carrier for damage during shipment. However, the such an event . Save by

the

unit

the

Marantz

the

carrier.

the

.

consignee may institute a claim with

damaged

U

to

save all original packing material

Receiver (refer

your

is damaged, notify

Company

~CKING

Model

the

factory

will cooperate fully in

carton

as evidence for inspection

to

transport

to

Figure 16 for packing

2270

carefully for

in perfect operating

the

carrier without

the

Figure

1. Rear

Panel

Connection Facilities and Adjustments

PREPARATION

REAR PANEL CONNECTIONS

All signal the

exception should be made with shielded 1 shows

on

the connections. be discussed later. are arranged in stereo pairs. To avoid confusion, connect and this way, you will avoid cross-connecting channels or confusing signal sources with destinations.

PHONO 1

The netic ohm

records, it is usually evidence of improper grounding or shielding of Try plug. If this is ineffective, ground wire from frame of

the a wood panel or is otherwise insulated from turntable base

the

If single overall shield, stead of necting cables together

connections

of

the

location of

rear panel. These jacks are for

Front

one

cable

the

other

PHONO jacks are

phono resistive load. If

reversing

to Model

to

the

two

the

to

components

& 2

cartridges requiring a

the

CHASSIS GROUND binding posts

2270.

frame,

grounding wire with a

pairs of signal wires in

arm itself. Keep

and

minimize

to

FM

panel jacks and

The

rear panel signal

at a time

intended

hum

record player or its

polarity of

the

turntable

If

the

connect

try

the

FOR

the

Model 2270, with

antenna

tone

the

grounding

"ground

and

audio

input

and

between

of

your

for

standard

is heard when playing

the

turntable's

connect

or record changer

arm is

tone

the

two

grounding wires close

USE

loudspeakers,

cables. Figure

output

"permanent"

their

use will

connections

the

system. In

use with mag-

47,000-

connections

a separate

mounted

arm

mounting

short

the

arm have a

the

shield in-

PHONO con-

loops."

jacks

2270

power

on

the

wire.

PLAY

The

pairs of TAPE IN jacks serve

1. With

2. With

RECORD 1

Connecting these jacks

.

inputs of a

the

program source indicated by

switch.

not

are

mid, bass, LOW NESS, MONO IN (L, R)

switches on

AUXILIARY

High level AUX

sources such as

the tion, signals can be played from a recorder This permits playing

phonically or monophonically (determined by position of MONO IN pushswitch).

the tion, recording, you can tape

quality

(TAPE) pushswitch. This presumes your record and playback heads and separate record and playback electronics.

& 2

tape

The affected by

the

two

selector switch in

set

for playback mode of operation.

the

selector switch in

and

while

recorder is

recorder permits recording from

signals available

FILTER,

front

input

extra

your

monitor

by depressing

equipped

to

the

balance, volume, treble,

Hi

and

panel.

jacks are

tape

"TAPE"

tape

source stereo-

any

other

tape

recorder is

the

MONITOR

with separate

line or

the

at

this pair of jacks

FILTER,

Hi BLEND push-

for

miscellaneous

players

with

purposes;

posi-

tape

posi-

resulting

that

"radio

"

selector

LOUD·

self-

2

,q-

S'VlSTEM 1

Figure

2. loudspeaker

~ E

AS FOR SYSTEM 1

System

PEA

T

WIRtN

G

Connections

contained playback preamplifiers. phono cartridges with

RIAA-equalized high-level

tuners and/or receivers,

TV

output,

additional

sound outputs, and

other external components. aUADRADIAL

In anticipation

broadcasting,

an

output

of

the coming

your

Model 2270 is equipped

aUADRADIAL

of

4-channel stereo

with

jack. The signal avai-

lable at this jack is the unequalized, buffered output quency

of

the FM discriminator. Its level, fre-

response

characteristic and

output

impedance are ideal to drive any 4-channel adaptor. This jack can also be noise generator of

loudspeakers or amplifiers

for

2270 in FM mode and tuned

MAIN

IN and PRE

OUT

used

as a simple white

frequency response check

with

the Model

off

from any FM signal.

The inter-connections from the Model 2270 on the preamplifiers outputs to the power amplifiers inputs are performed externally. Special

use

MAIN

two

your

jumper plugs normally interconnect these

IN and PRE

special jumper plugs allows you

OUT

jacks. Removing these

to 2270 as an independent basic stereo amplifier and/or an independent stereo control center. Be

to

sure 11\1

and PRE

replace the jumper plugs between the

OUT

jacks

for

normal operation.

MAIN

LOUDSPEAKER SYSTEMS

The SPEAKER SYSTEMS terminals on the rear

will

panel

accomodate

speaker systems

of

two

stereo pairs

of

loud-

rated impedance between 4 ohms and 16 ohms. When using only one stereo pair

of

loudspeakers, connect them to the terminals. The REMOTE terminals are second stereo pair

Selection

of

loudspeakers.

loudspeaker systems is made

MAIN

for

with

the MAIN-SPKR-REMOTE pushswitches on the

front

panel.

your

Use caution when connecting

with

built

to a loudspeaker

-in power supply such as an electrostatic loudspeaker. The connection terminal

of

such a speaker may be

Model 2270

"common"

capacitively grounded through its power supply. Make sure the

GROUND 2270 are connected to the of

such loudspeaker systems. Ordinary cord") 25 feet) between loudspeakers.

# l8-gauge, 2-conductor lamp cord ("zip-

may be used

for

your

For

longer lengths,

heavier wire should be used

terminals

"common"

normal

of

the Model

terminals

distances (to about

2270 Receiver and your

#16

-gauge

to

ensure optimum

or

speaker performance.

of

When connecting a stereo pair

it

is

important

to

ensure correct relative phasing

loudspeakers,

(polarity). When using identical loudspeakers, sim-

ply

code one wire

a knot, tape, etc. (Note: Close inspection

of

each pair at both ends

of

with

stan-

a

3

dard

zipcord

on

the

insulation, e.g., ridge

edge,

one

other

is bare

identical

For

each channel, between speaker and fier channel. connected and amplifier terminals. This insures

will reveal some

of

the

wires

copper

connections

the

"common"

the

GROUD terminal

The

remaining

between

form

or

groove on

may

be "silver" while

.)

Coded

wires help insure

for each channel.

coded

the

wire can be

terminal

uncoded

of

the wire is

remaining loudspeaker

correct

of

coding

one

the

connected

your

loud -

ampli -

then

pola-

rity or phasing of identical loudspeakers.

there

is

any

if

doubt

they

If

pairs,

or a simple listening With program signals fed to with the

the

MONO IN

sound should midway between balance is source should

turned

control

away from

appear

about

are

not

test

appear

the

centered

the

to

phasing of loudspeaker

identical loudspeakers,

can verify

pushswitches

to

correct

both

channels, and

originate

depressed ,

at a point

loudspeakers, with

. As

the

balance

center

move

position,

toward

the

one

phasing.

the

control

sound of

the loudspeakers. Room acoustics can sometimes make this temporarily ther

as possible. MONO with strong bass passages. Reverse

one

of passage again. If this reversed back

to

ceably

test

ambiguous or

move

the

loudspeakers as close toge-

Then

set

operation

the

and listen

loudspeakers and listen

there

is noticeably less bass with

connection,

the

original arrangement. If

more

bass, leave

the

controls

to

change

the

confus

ing. If so,

for

balanced

program material

the

wires

to

the

connections

there

is noti-

wires

connected

to

same

in

reverse.

cable. (An unshielded lead-in wire can an omnidirectional

antenna, directional benefits of 300-ohm conductors

jacket. This prevents

shielded cable consists of

plus an

type

of shielded cable effectively

the

lead-in

from

outer

and can cancel

your

antenna.) Low-loss

shield

and

contributing

act

the

two

inner

insulating

multipath

distortion.

For

rural areas, it is

dealer be consulted

lightning terns are Model expressly

arrestor

not

2270;

for

recommended

such systems are usually designed

television reception and suppress FM signals before master

quality

Where

antenna

systems

FM reception.

outdoor

antennas venient, use a simple ear"

dipole

antenna

or

supplied with

recommended

about

antenna

protection.

distribution.

often

are

form

of

the

simple

that

a local

installation and

Master

for

antenna

use

with

your

frequently

In addition,

severely limit good

prohibited

300-ohm,

ribbon-type

the

or

incon-

TV

"rabbit

folded

Model 2270.

svs-

Both are practical and will give satisfactory results

in primary signal areas. will

accept

either

(See diagram Figure 3.)

cable should be marked FM on

connected the

using 75-ohm coaxial

to

the

shield inner or

"G"

center

conductor

Your

Model

a 75-ohm

The

to

ANTENNA

antenna

2270

or

300-ohm 300-ohm

the

two

terminal. When

cable,

connect

Receiver

antenna.

antenna

terminals

(GROUND) terminal, and its

to

either

of

the

FM

its

terminals.

as

These phasing procedures should be used with each

stereo

or REMOTE. If

used in

MAIN pair is also

pair of loudspeakers,

both

pairs

of

the

same listening area , ensure

"in

phase" with

whether

MAIN

loudspeakers are

that

the

REMOTE

pair.

CAUTION :

NEVER DIRECTLY CONNECT THE LOUDSPEAKER IN

PARALLEL

OTHER.

COVERED

NOT

TERMINALS

WITH THOSE OF ANY

ANY RESULTING DAMAGE IS

UNDER

OF ONE CHANNEL

WARRANTY.

FM ANTENNA

The

best FM reception is Periodic rotor

type

system.

antenna,

For fringe areas, Marantz Periodic

antenna

with six

signed expressly for FM reception.

local noise and

multipath

in wires, use a balanced and shielded

obtained

mounted

recommends

or

pickup

with a Log-

on a good

more

elements

For

by

quality

a Log-

deminimum the

lead-

300-ohm

AM

.

...

I <i I,

e

•

..

I ' ,

:

.

~ ~

SINGLE:

fM

AVO

lIlIii

.

~.

soon SHI[ l OEO

TRAN

SMI

SSION LINE

ANT

tNN

A

...

NT2,N".

...

O,.;~"';'

:-

o e

"

.

lOOO UNSHIELD ED

WIRE

ANTEm".

. ,,"TC""""'"

TRA N. SM tSSK)N LI NE •

"iil

, I I , I

: . :

. . .•. . •

SHIELD

750 TRANSMISSiON . ..SHIELD

LINE

FM

"'''''

IllM 0 r M

llIJi

.

~

(T WI N l EAD ' : !

rM ANT£ N NA

A....

"'''''T

I 0

...

i3B88

COAX.

~

Figure

3.

FM/AM

Antenna

ANf[

NNA

1.''''1'01'''

iiil

, ,

I •

, .

~

e:''''

~A

" !J; ~ oori

. .I. e

,

~

Connection

,

l1li

""

.

4