Marantz 2245 Owners Manual

Model

Stereoohonic

Becdiver

2245

rrrä-roArnt-"

Model

2245

Stereoohonic

Recriiver

MARANTZ CO,,

A WHOLLY-OWNED

INC..P.O. BOX 99.SUN

SUBSIDIARY OF SUPERSCOPE

VALLEY CALIFORN

INC., SUN

VALLEY CALIFORNIA

IA.91352

91352

Maranrz

Company,

in material and

prosdly

lnc-,

workmanship

WARRANTY

warrants

as lollows:

Elt,seE.üaürgüEr

We sound

your

From

date

betler.

Maränlz

oI

Purchase

prodüct

io be free o{

manulacturins defects

Erectroniccomponenrsa'dReceive's

+Channd Remote

Pluq-in Matrix Decodeß

Speakeß and

TO VALIDATE

ISTRATION CARD

91352.

For Wanänty repair,

California
lvläEntz will

This Wärranty is

repair€d in any

WITHIN TEN DAYS

YOUB WARRANTY,

TO MAFANTZ

send this

91?52, or to an

pay

shipping charges

return

void if the terial

manner which

AUTHORIZED

k not op€räted in aeoldance

l/brantz shall have
Comp.ny, Inc,,
in rhe sole diicrerion

EXCEPT

THERE

TO THE EXTENT

IS NO III/IPLIED

THIS PRODUCT,

THE PROVISIONS

no liability whätsoever

under this Wairanty

ot [4arantz

WARRANTY

NOR ARE THEBE

OF THIS WABRANTY.

Control

Cabinets

YOU MUST

COMPANY,

FOLLOWING

Ploduct

nümber has been

Marantz believes

with the

THE DATE OF

Maran? Companv,

to

Mamnlz Service

ro anv d6iqnated

insttuction

lor consequentiäl

shall be limited

company,

THAT APPLICABLE

lnc.

OF IIIERCHANTABILITY

ANY OTHEB

iääH: :I:i:

PARTS

LABOR

PARTS ' 3

LABOR

PARTS - 3

LABOR

PARTS

LABOB

FILL OUT

P. O. BOX 99. SUN VALLEY,

INC.,

mav aff€ci

manual.

to the

LAW PBECLUDES

PURCHASE.

lnc., 8'150 Vineland

Station.

within the United

Point

altered

or removed; if the

the reliabilitv of the

damages.

tePair oI the

WARBANTIES

.

3

veaß

years

-

3

years
years

-

3

yeals

yeaß

-

3

years

-

5

y€aß

-

5

AND IVIAIL THE

All shippinq charges

States.

Product

product;

The sole resPonsibilitv

product,

DISCLAIMER OF

A

FITNESS WITH

OR

or

WHICH EXTENT

WABRANTY

CALIFORNIA

Avenue,

must be

BEG'

Sun Vallev,

prepaid,

is mddilied

product

iI the

o{ Marantz

teplacement thereoi

WARRANTY,

RESPECT

TO

BEYOND

or

,nitffi

piiE#\$fl

81 50 Vineland. ,$tetue.

fd'$i $ifi

fi$iFiII >

Sun Valle./, Califltnio 91352

REGISTRATION

lvlodel:

Serlal

Purchased

Date

The above information becomes
a valuable

same time that

reply

lnsuränce

häve any correspondence wirh

Marantz IVlodel 2245

No-

From

Wardnty Replv

purchase.

cärd to t\,4arantz. Thls information

record

FOR MARANTZ 3.YEAR
WABRANTY

{Name)

Cdrd

lt

fill ln and mai th€ waiianty

vou

must also be referred 1o should

and

l,4ailed

shouLd

yo!r permanent

promptly

be

provides

Maranlz.

GOLDEN

re.ord ol

filied in

reg stratlon

!alüabie

a

at

the

Vou

TABLE OF CONTENTS

Preparation

Rear Panel Connections

Phono

Tape ln
Tape Out

Auxiliary

Ouadradial

l\4ain ln and

Loundspeaker Systems

Anlenna Attenuator

Power Connections

Connection to

Convenience Outlet
Simplif ied Operating

Tuning
Tuning

l\4ono Switch

Tape lMonitor

Loudness

Low

Filter Switch

Hi

l\4uting Switch and

for

Use

Pre

AC

lvleters

Switch

Switch

Filter Switch

Out

Outlet

Procedure

Level

Control

l\,4uting Circuit

Selector Switch

2

2

2

2
2
3
3

3

3

4

5

5
5
5
6
6

6

6
6

6
6
6

Tape Signals

Tape l\4onitor
Phqno Signals

I\4ono Functions

Switch

Control Circuits

Balance Control

Volume Control
Tone Ampli{ier

Hi-Lirw Filter

Output Stage and Protective

Technical Specificataons

Typical Per{ormance

Service

Note

Curve

Circuits

12

12

12

13
13

13
14

14

15
15
15

16

17

19

Controls and Switches

lVIain

Selector

Balance Control

Volume

Bass

lVIain-Spkr Remote Switch

Front

Switch
Control

l\4id and Treble Controls

PanelJacks

Dubbing Out
Dubbing ln

Stereophones

Suggestion on Using Tape Recorders

Some

with Your

Recording and
Becording

Playback

lMaa<ing Two

Becording a

Copying and

Convertinq

Model 2245

Playback

Recordings Sirnultaneously

Long'Duration Program

Editing

Your

Stereo System to

4 channel

Technical

General

Description

Functional Description

End

Front
lF Stages

Lim iter

FM Stereo Demoduläror

11

11

11
11

12
12
12

1
7
7
7
7
7

8
8
8
8

I

8
8

I
I

LIST OF

1. Rear Panel Connection Facilities and

Adiustments

2.

Loudspeaker System Connectlons

3.

Fl\4/A[\4 Antenna Conneclion

4.

5.

6.

7.

8.

Ferrite-rod

AIVI

Panel

Front

Stereophone Plug
Arrangement oJ Two Tape Becorder

Connection Diagram
Functional Block Diagram

10.

PhonoEqualizationCharacteristics

Tone Control

11.

Low and High Filter

12.

13.

FlVi Characteristics

14.

Stereo Separation

15.

Harmonic Di$ortion

16.

Frequency Response

17.

Päckinq lnstructions

ILTUSTRATIONS

2
3

4

Antenna 5

Controls and Jacks 1

I
I

10
1'l
13

Characteristics 14

Characteristics 14

17
17
18

'18

1S

F{3HüWffiMM

For optimum

l\,4odel 2245 Sleteo

Vour

these instructions

lion are

fpatu'es

controls

This

covers installation

non-technical

2245 in mote detail

Junctional explanations,

discl]ssions.

For

connections,

boldface

and

deserve

and connections.

manual

quick

panels

rear

performance and enjoyment

carefLllly.

not complicated,

yoL/

beLomlrg

is divided

and

lanqllage.

with

identification

references to

exacrly as

type,

Your

Receiver-

o{

Receiver,

lnstallation

but its

into two

operation

second

The

technical

and special

the controls

of

them

thev appear

please srudy

and

flexibility

ldnrllal

parts

wlth

The

in

describes

specifications,

application

printed in

are

the

on

from

opera

and

ils

first

simple,

the

and

fronl

ru ffi ffi A{-

ffi

ffi

lMarantz Model

Your

incorporates

l\4arantz

ind!rstry.

Unparalleled

this combination

ble

sections

Power Amplifier.

and

tween

per{orrnance from each

these

flexibility

ordinary

the advanced

is famous

technology

a single

on

cornponent

o{ separate

flexibility

the connection

headphones;

ers;

additional

solrnd

capabilities
or two recorders.

luner

source.

are included

mffi s#ft

chassis:

o{

two srereo

of:

a lurntab

(such

Record,

I rT'!f-}p$

2245 all solid

circuitry

in the

and innovation

of three

lnternal

sections

section,

components-

your

as SW

audio component

superb

Tuner,

connections

ensure

and retain

l\,4odel

pairs

or record changer;

e

or LW)

pLayback,

{or

lape

a

recelver

state

which

for

possi

made

component

Preamplifier,

be-

optirnum

full

the

extra-

The

permits

2245

loudspeak'

of

an

ä TV

and

copying

and

playback deck

AFTER

advisäble to save all original

It is

prevent

to

the Receiver

ship

instructionsl.

Please

signs of

stringenl

to

operating condition.

inspect

quäliry

packing,

UNPACKING

damage should

(refer

your

darnage in transit. lt has

conTrol

and left the

you

Figure lT for

to

l\,4odel 2245 catelully

inspection dnd

lf the unit is damaged, notify

delay.

Onlv the consignee
carrier

l\4arantz

Save

by the carrier.

for damage during shipment.

Company will cooperate

the damdged carlon as

may institute a claim

evidence

packing

to transport or

wish

undergone

rests

{actory in

the

carrier

However,

{ully in such an

jor

inspeclion

material

packing

Io( aoY

ptiot

perfect

without

with the

the

C

PREPARATION FOR USE

REAR PANEL CONN ECTIONS

All signal connections to the l\4odel

exception of the

$ould be

1 shows

the rear

connections.

discussed

are arranged in slereo

connect one cable at a time

the other

you

fusinq

c

made with

the location

panel.

Front

ldtpr.

components of

wili avoid

siqnal sources

2245, wilh the

Fl\4

antenna and loudspeakers,

shielded audio cables. Figure

of input and output

panel

with

jacks

jacks

panel

pairs.

your

destinations.

for

are

and their use will be

siqndl

To avoid confusion,

between the 2245 and

system. ln this way,

These

The rear

cros+connecting channels or con

jacks

"permanent"

connections

on

Figure l. ßear

Keep

itself.

grounding

the

"ground loops."

TAPE

The

IN

pair

1. Wilh the selector

Panel

C0nnectiofl

the two

o{ TAPE

signals can be

for

set

PHONO

wires close togelher

jacks

lN

played

playback

permits playinq

ophonically or

position

ed by

monophonically as indicat-

of MONO

FacililiesEnd

connecting cables

serve

slvitch

from

mode of operation. This

Ad,ustmeds

and

to

minimire

purposes:

two

irJ'TAPE'bosition,

a tape recorder

the tape sou rce stere

pushswitch.

PHONO

phono jdcks

he

I

magnetrc
47,000-ohm

playing

grounding

connections.

turntable's

connect a separate

phono

resistive load. lf hum is

records, it is usually

or shrelding

Try reversing

power

or record changer frame

GROUND binding

tone arm

otherwise insulated from

is

are intended lor

cartridges requiring

evidence ol improper

ot the record

polarity

the

plug.

ground

lf this is ineffective,

wire from the tLrrntable

to the CHASSIS

posts

of the lModet

mounted on a wood

the turntable

connect the lone arm mounting

grounding

o{ signal

shield, trv

wire

with d

wires in

grounding

short

wrrp. ll

the arm have

lhe shield instedd

a

with

use

a standard

heard when

prayer

or

oJ the

2245.

panel

base to the

thc t!1,o

single overall

tf the

or is

frame,

pars

ol the drrr

its

2. With the

position,

recording,

tape

MONITOB

your

record and

record and

TAPE

Connectinq these
inputs of a tape recorder

the

switch. The signals available at this

not affected

bass,

and

OUT

program

LOW FILTER, Hi FILTER.

lvlONO

pushswitches

selector switch in any other

and while

you

quality

pushswitch.

recorder is

playback

playback

iacks

source

by

the balance.

your

can monitor the resulting

bv depressing the TAPE

This

equipped with

heads and

electronics.

to the line or "tadio"

permits

indicated

volume, treble,

on the

recorder

tape

presumes

recording from

that

separate

separate

by the selector

pair

or

front

jacks

of

LOUDNESS

panel.

are

mid,

is

Figure 2.

Loudsteaker

System

Connections

AUXILIARY

level AUX input

High
sources such

contained

as extra

playback

wilh RIAA equalized

t!ners and/or

external components.

other

receivers, TV

iacks

preampl

high-level

OUADBADIAL

ln anticipation

broadcastinq,

ourpur
this

Fl\,4 discriminator.

characteristic
drive
used as a simple

quency
fiers, with the

off from any

OUADRADIAL

jack

is the unequalized,

anv 4 channel

response

of rhe coming

your

l\lodel 2245

jack.

lts level,

output

and

adaptor.

white

check of

lvlodel 2245

FM signal.

MAIN lN and PRE OUT

Connections Jrom the

these

vour

power

lvlAlN lN and

two special

2245 as an

lN and

outputs to the

+ormed

interconnect these

Removing

you

stereo

externally. Special

10 use

amplifier and/or

control center, Be sure

between the MAIN
normal operalion.

are for miscellaneous

players with self

tape

phono

if iers,

output,

sound

outputs,

o{ 4 channel

is equipped

signal available

The

buffered

output

frequency

impedance

jack

This

generator

noise

loudspeakers

in FI\4 mode

l!4odel 2245

amplifier inputs

jumper plugs

PRE OUT

jumper plugs

independent

an independent

to replace the

PRE

iumper

OUT

cartridges

additional

and

stereo

an

with

the

of

response

also be

{re

for

to

are ideal

can

or ampli

tuned

and

preamplifier

per

are

normally

iacks

allows

basic

stereo

plugs

jacks

for

LOUDSPEAKEB

The SPEAKEB

panel

loudspeaker systems

ohms and
pair

terminals.

stereo

Selection

lvlAlN-SPKR-REMOTE

panel.

at

Use

will accommodate

16 ohms. When using

o{ loudspeakers, connect

The REII4OTE

pair

of loudspeakers.

of loudspeaker systems

caution when connecting

a loudspeaker

an electro-static

conneclion

capacitivelv

Vlake sure
2245 are connected

such

Ordinarv #18

("zipcord"i

about
your

or heavier wire

speaker

When

important
(polarity).

simply

with a

the GROUND

loudspeaker system.

25 Jeet) belween

loudspeakers.

performance.

connecting a slereo

code

knot, tape. etc.

SYSTEMS

SYSTEIMS

terminals

Iwo

of rated

with bualt in

loudspeaker,

terminal of such a

qrounded

to the

qauge,

may be

used for normal

For longer

should be used to

to ensure

When

usinq identical

one wire of each

impedance between

them

{erminals are

pushswitches

your

power

through

terminals of

"common"

2 conduclor

your

2245

lengths,

pair

of loudspeakers,

correct relative

on the rear

stereo

only

is made

Tl,e

speaker

its

paars

one stereo

to the

MAIN

for a second

wilh

on lhe

lvlodel

2245 to

supply such

"common"

may be

power

supply.

the Model

terminals

lamp

distances

Receiver

+16

ensure optimum

phasinq

loudspeakers,

pair

at both ends

of

the

front

as

of

cord

(to

and

gauge,

it is

4

J

3

(Note:

'pvaal

rioqF o'
be

wires

channel,

For

Close inspection

\orp

lorr o'codinq o'1 lhp r1'ulatron,4,q,,

g'oovp

"silver"

on ono

while the other

help insure identical connections

each channe.

between the

loudspeaker

amplifier

then connected

and

polarity

l{ there

pairs,

simple

With

with the

C

should

between

centered.

amplifier lerminals.

or if they are

program

and the

channel. The

between the remaininq

phasing

or
is any doubt about

listeninq

signals fed to both channels, and

MONO

appear to originale at a

the loudspeakers,

As the balance contro is turned away

from the center

appear

Room

ambiquous

the

set the controls

listen to

ages. Reverse the

and listen

.ofic"obly

change

ranqement.

the wires connected in reverse,

These

stereo

REMOTE.

to move toward one

acoustics can somelimes

or confusing.

loudspeakers as c ose toqether

program

to the same

less b"\s w l I'

the connections back to the original ar

lf there is noticeably more bass,

phasinq procedures

pair

of

lf both

the sanre listening

peir

is also

"in phase"

wrrp"

Coded

will

näy

of

pouo.

is

ständard

zipcord

onp o

bare copper.)

ll'F

for each

the coded wire can be connecred

"commoi"

GROUND terminal of the

termjnal of

remaining uncoded wire is

Loudspeaker

your

This insures correct

o{

identical

not

test

can

pushswitch

position,

for

balanced

material with strong

wires to one of the loudspeakers

Loudspeakers, whether IMAIN or

pairs

of loudspeakers are used in

area, ensLrre that the [4AlN

loudspeakers.

phasing

identical

verify correct

depressed, the sound

with

the sound source

o{ loudspeaker

loudspeakers, a

point

balance control

the

phasing.

midway

shou d

of the Loudspeakers.

make this test

lf so, lemporari

possible.

as

IMONO operätion and

passage

should be used with each

with

again- lf there is

c

'Fvp

'ad

the REMOTE

y

rnove

Then

pass

bass

,

orn"cr:on.

leave

pair.

(An

shielded

wire can

can cancel

ä1'pr1a.) Lolv

300ohm cable.

act as än omnidirectional antenna,

the directional benefits of

los.300.ol_Tl \'

of two inner conductors

insulating

effectively

multipath distortion.

For rural

dealer be

lightning

system

jacket.

prevents

areas, it is recommended that a loca

consulted about antenna installation and

arrestor

are not recommefded

Model 2245; such systems are

expressly

suppress
addition,
limit

{or television

FM siqnals before distribution. ln

rnaster antenna systems

qLrality

good

This type of shielded cabe

lead-in from

the

protection-

reception

FIVI

reception.

Where ouldoor antennas

inconvenient,

"rabbit

{olded dipole anterrna supplied

2245.

results in

Receiver

antenna.

Aarh are

use a simple

antenna or the simple

ear"

practical

primarv

siqnal

will accept either a 75 ohm or 300 ohm

(See

diagram

Figure

unshielded lead-in

eld"d cdb'p

plus

an ouler shield and

I\,4aster

{or

use with

usually

and

often

prohibited

are

form

of 300-ohm, TV

with the lvlodel

änd will

areas.

qive

Your [,4odel

The

3.)

inrenna cable should be connecled

terminals marked

When using

its sh;eld

to the

FIM on the

75 ohm coaxial

(GROUND)

"G"

inner or center conductor

ANTENNA terminal.

antenna cable, connect

terminal, and its

to either

and

your

or\,sls

'

contributifg

antenna

your

designed

frectuently

severely

or

ribbon

satisfactory

type

2245

300ohm

to

the two

of

the

FM

CAUTION:

NEVER

SPEAKER

IN

OTHER. ANY RESULTING

NOT COVER ED UNDE R

DIRECTLY CONNECT THE LOUD

TERIV]INALS OF ONE CHANNEL

PARALLEL WITH THOSE OF ANY

DAMAGE IS

WARRANTY.

FM ANTENNA

The best

Log-Periodic

quality

recommends a

F [/] reception

type

antenna,

is obtained with a

moLnted

on a

qood

rolor system. For fringe areäs, I\4arantz

Log Periodic

antenna with six or

more elements designed expresslV Jor FM

reception. For minimum local noise

picl<Lrp

by the lead in wires, Lrse a balanced änd

and

multipath

üü

Fiqure

Fl',4/A[4 Antenna Connection

3.