Manual Marantz Model 2270 (page 6 of 24) (English)

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PREPARATION

FOR

USE

REAR PANEL CONNECTIONS

All signal

connections

the

Model 2270, with

the

exception

the

antenna

and

loudspeakers,

should be made with shielded

audio

cables. Figure

1 shows

the

location of

input

and

output

jacks

the

rear panel. These jacks are for

"permanent"

connections.

Front

panel jacks and

their

use will

be discussed later.

The

rear panel signal

connections

are arranged in stereo pairs. To avoid confusion,

connect

one

cable

time

between

the

2270

and

the

other

components

your

system. In

this way, you will avoid cross-connecting channels

or confusing signal sources with destinations.

PHONO 1

& 2

The

PHONO jacks are

intended

for

use with mag-

netic

phono

cartridges requiring a

standard

47,000-

ohm

resistive load. If

hum

is heard when playing

records, it is usually evidence of improper grounding

or shielding of

the

record player or its

connections

Try

reversing

the

polarity of

the

turntable's

power

plug. If this is ineffective,

connect

a separate

ground wire from

the

turntable

or record changer

frame

the

CHASSIS GROUND binding posts

the

Model

2270.

the

tone

arm is

mounted

a wood panel or is otherwise insulated from

the

turntable

frame,

connect

the

tone

arm

mounting

base

the

grounding wire with a

short

wire.

the

two

pairs of signal wires in

the

arm have a

single overall shield,

try

grounding

the

shield in-

stead of

the

arm itself. Keep

the

two

PHONO con-

necting cables

and

the

grounding wires close

together

minimize

"ground

loops."

Figure

1. Rear

Panel

Connection Facilities and Adjustments

PLAY

The

pairs of TAPE IN jacks serve

two

purposes;

1. With

the

selector switch in

"TAPE"

posi-

tion, signals can be played from a

tape

recorder

set

for playback mode of operation.

This permits playing

the

tape

source stereo-

phonically or monophonically (determined

by position of MONO IN pushswitch).

2. With

the

selector switch in

any

other

posi-

tion,

and

while

your

tape

recorder is

recording, you can

monitor

the

resulting

tape

quality

by depressing

the

MONITOR

(TAPE) pushswitch. This presumes

that

your

recorder is

equipped

with separate

record and playback heads and separate

record and playback electronics.

RECORD 1

& 2

Connecting these jacks

the

line or

"radio

inputs of a

tape

recorder permits recording from

the

program source indicated by

the

selector

switch.

The

signals available

this pair of jacks

are

not

affected by

the

balance, volume, treble,

mid, bass, LOW

FILTER,

LOUD·

NESS, MONO IN (L, R)

and

Hi BLEND push-

switches on

the

front

panel.

AUXILIARY

High level AUX

input

jacks are

for

miscellaneous

sources such as

extra

tape

players

with

self-

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Marantz Model 2270 Manual

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