Technics RS-M27OX Operating Instructions Manual

Technics

TAPE

DECK

RS-M27OX

OPERATING

INSTRUCTIONS

Before

operating this

set,

please

read these instructions

completely

We

thank

you

for

selecting

the Model RS-M270X

Technics

Cassette

Tape Deck for

your

recording and

playback

enjoyment

To obtain

the maximum benefit of

the many features of this

deck,

please

read these operation

instructions completely.

WARNING:

TO PREVENT

FIRE OR

SHOCK

HAZARD,

DO

NOT

EXPOSE

THIS

APPLIANCE

TO RAIN OR

MOIS-

TURE.

The

serial

number of

this

product

may be

found on

the back

cover

of the unit.

You should

note the serial

number

of this unit

in the

space

provided

and

retain this

book as a

permanent

record ol

your

purchase

to aid identification

in

the

event

of theft.

Model no.

Serial

no.

eristics

a signal

he

"dbx

'1

3dB"at

lhat

the

FEATURES

.Output

Level Control

OPERATION

NOTES

CASSETTE

TAPE

Horizontal

Placement

For

best

performance,

place

this unit

in a horizontal

position.

Location

1.

2.

.dbx

Noise

Reduction**System

oDolby

Noise Reduction*

System

oDirect

Drive System

.2

Motor

lC Logic Control

.Full

Function

Remote Control

Capability

Performance

may be

adversely affected

by extremely

hot

[above

35'C

(100'F

)]

or extremely

cold

[below

5'C

(40'F.)]

locations,

direct sunshine,

or excessive

vibration.

3.

A

"click"

noise

may be heard

when the

power

switch

is

turned on or of

f To avoid

this, be sure

to

set

volume control

of

the amplif

ier to the

minimum

position.

4. Power

Source

This unit

features a DC operated

molor

which makes

it

possible

to operate on 50

Hz or 60

Hz AC

power

frequency

without any

conversion

The

voltage

source

should

be

within

+5%

of

the unit's

rated voltage Variations

in excess

of

+10o/.

of rated

voltage may cause uneven

performance,

or

possible

damage

to the unit.

5.

Clean

The Head

Assembly

One

of the

most important

factors in the determination

of

good

tape deck

performance

is

regular

cleaning

of the

Head

Assembly.

Refer to

"MAINTENANCE" on back cover

and

be sure

to

always

keep

the heads surfaces

clean.

ACC!DENTAL.ERASE

PREVENTION

Tape cassettes

have special

plastic

tabs, one

for

side

one and

one

for side

two, which, if

removed,

prevent

accidental erasure

of

recorded

material.

These tabs can be

pushed

out

with a

screwdriver

or similar

tool. lf they are

not in the

cassette,

the

recording

cannot be

made. lf

,

for any

reason, it is later desired

to

make a recording on

a cassette

from which the tabs

have

been

removed, it is

possible

to do so by simply covering

the

holes

where the tabs

were with cellophane

tape,

and

then

record

in the usual

way.

'F)x

.T

For

Side

1

.Peak

Hold

2-Color

FL Meters

.SX

Record/Playback

Head

."Metal

Tape" Compatibility

.Record

Muting

About Cassette

Tape

The cassette

tape used

in this unit

is the

universal

type used

throughout

the

world.

Product Service
Should

your

Technics

product

require service,

refer to the

Directory

of

Authorized Servicenters, or

to

your

lranchised

Technics

dealer,

for

assistance

Do notsend the

producttothe

executive,

or

regional sales offices

They are not equipped

to

make

repairs.

For

Side 2

Screwdriver

Tab

Cover

With

Cellophane

Tape

'dbx

in"

without

s

played

t

is

clear

re

great

n in the

is vastly

rr to that

rloise

apes

'e

be

)with

sition

J this
>cord

\ <----\

.w

Notes:

1. Do

notpull thetapeoutof

thecassetteopenings.

2.

lf the tape

is loose in the cassette,

the tape

may

become

wound

onto the

Pinch Roller and

result in

breakage

or damage

lt the tape

is loose, use a

pencil

as a

drive shaft

to rotate

the reel

in

the

proper

direction

Avoid storing

cassette

tape in

places

where the

temperature

and/or the

humidity is high.

lf the tape

is very tightly wound/or unevenly

wound,

wind and

rewind it in the

fast forward

and

rewind

modes before use

5. Use

only

high

quality

tapes up to the

length

of C-90.

Do

not use C-120 or C-180

tapes with this unit be-

cause

this tape can easily

become broken

or

stretched

if not used with extreme care and

may

get

tangled

with the

Capstan

and Pinch Roller.

6. Since

dirt on the

Heads,

Capstan

or Pinch Roller can

cause

tape malfunctions, these

parts

must be kept

clean,

as instructed

in

the

"MAINTENANCE"

on back

cover.

3

4

*'Dolby'

and

the double-D symbol

are trademarks

of Dolby Laboratories

**The

term

dbx

is a registered

trademark of

dbx

lnc.

-1-

CONTROLS

Tape

Counter and Reset

Button

(tape

counter)

Cassette Holder

Eject

Button

(eject)

Power

Switch

Ipower

(push

on)]

Headphones

Jack

(phones)

Record Button with

Record lndication

Lamp

lrec

(O)l

Bewind

Button

(rew) ({

{)

Stop Button

[stop

(I)]

Fluorescent

Meter

Noise Reduction

Selector

Switch

INoise

Reduction

(Dolby

NR. out.

ldb,-ltape

.

klEloisc)l

lnput

Level

Controls

(input

level) (LlR)

Microphone

Jacks

[mic

(lef

t. right)]

Timer

Start Switch

(timer

recQ)

(Ioff.ron)

lnput

Selector

(input

select)

(lline.rmic)

dbx Display

Lamp

(

l,iL,l

)

Output Level

Control

(output

level)

Tape

Selector

[tape

select

(normal

.

Fe-Cr.

CrOz

.

Metal)]

Power

Cord

Remote-Control

Connector

(REMOTE

CONTBOL)

Button

with

Playback

lndication

Lamp

Fast Forward

Button

tff

(>

>)l

Pause

Button with

Pause lndication Lamp

lpause(ll)l

Record Muting

Button

(rec

mute)

(O)

Line

Output Jacks

(LINE

OUT)

(R.

L)

Playback
tplay

())l

Line

CONNECTIONS

lnput

Jacks

(LINE

lN)

(R.

L)

I . OO

=EE

O

EE :,

REMOTE

CONTROL

L|NE

OUT

(R.

L)

Remote-control
unit

(RP-9645,

optional)

LINE IN

(R.

L)

J!t4

FM

Stereo

tuner

(left)

phones

Headphones

Location

of this unit and

stereo amplilier

lf this

unit is

placed

on

top

of the stereo

amplifier or next to it, a

"hum"

noise may

be

heard

during tape

playback

Refer

to

the information

below

in

order to avoid this

.lf

the stereo

amplifier and this

unit are

placed

one above the

other,

leave

as much

space as

possible

between them, and

place

them where

there is the least

amount of hum

.lf

the stereo amplifier

and this unit

are

placed

one beside the

other, try reversing

their

positions,

and

place

them where

there is the least

amount of hum.

Stereo Connection

Cords

(RP-023P)

Record

player

Connection Notes:
.Connections

should be made in

accordance with

the

connection

diagram and the following

instructions

When 2 microphones

are used in order to record

in

stereophonic

sound, be sure both

of them have the

same

specif

ication

standards

.Do

not

connect

the DIN connection

cord to the Remote-

Control Connector

since this may result in

damage

being sustained

to the amplif ier

or speakers

/(R)

OUTPUT

-2-

dbx

Noise Reduction

System

The dbx Noise Reduction

System

serves to

greatly

reduce the

noise

generated

during recording and

playback

across

the

whole audible

frequency

spectrum

(reduction

by more than

about 30 dB) and also to

improve

the linearity at high input

levels. As a result,

both

recording

and

playback

can be

performed

without impairing the wide

dynamic range of the

original sound

There are two

kinds

of dbx Noise Reduction

System:

type I and type

II. Type I is used for

open-reel

decks

and

industrial

applications

while Type

II, which is featured in

this deck, is used for cassette applications.

Features

1 Reduced

noise

over the whole audible frequency range

(more

than about

30

dB reduction).

2 The

noise is

compressed at a high recording level for

recording to enable recording with minimal

distortion and a

wide dynamic

range.

3.

The linear logarithmic

compression and expansion do not

make the

sound

quality

undergo change with level mis-

matching.

Principle of basic

operation

The dbx system works to

expand the dynamic range

by com-

pressing (encoding)

the signals

and then expanding

(decoding

them As shown in

the

figure,

the input

signal level is halved

during recording

onto the tape. During

playback

the halved

level is

doubled

to

restore the original

signal.

The figure

shows

that

high

signals are

greatly

expanded

(from

"+10d8"

to

"

+20" dB)

while low signals are

given

a

low

expansion

(

"

-40

dB"to"-80d8"

)

This results

in a

great

improvement in

the

dynamic range and

simultaneously in a

great

reduction in tape

h

iss.

lnput Encoding Decoding

Output

ttt4d44fi/u^r,1l{{

Tape hiss

Expansion

in

Dynamic Range

The

figure

below shows the

dynamic

range

characteristics

First the overall

frequency

response is

indicated at a signal

level where

the distortion is made

3% al l

kHz.

When the

"dbx

in"

position

is selected,there

is an

increase

of about"l3dB"at

the 3%

point

over the

"out"

posrtion,

indicating

that the

distortion

with high input

levels is

greatly

improved.

ln addition, the

noise

distribution

is indicated

at the "dbx in"

"dbx

out"

positions

when the noise

level

is recorded without

any signals being supplied and that

noise

on the tape is

played

back.

With recording and

playback

at the

"dbx

in"

position,

it is

clear

that the noise level is

greatly

reduced.

Because

of the

great

reduction in

the noise level

and the

great

expansion in

the

signal

level, the

dynamic

range

at the

"dbx

in"

position

is vastly

improved,

and a dynamic

range

which is vastly

superior to that

ol a2-lrack

38 cm/sec. open-reel tape is

yielded.

Notes:

oThere

is no

compatibility between the dbx Noise

Reduction

Systems and other similar systems Tapes

recorded

with the

dbx

system should

therefore

be

played

back with

the dbx

system.

oRecord

ordinary

discs

(not "dbx

encoded

discs") with

the noise

reduction

selector

switch at

any

position

except

"disc".

The

sound

quality

will change if

this

switch is set to

the

"disc"

position

for

ordinary record

play

+2AdB

0dB

\

r

ape saru

level

alton

+zadB

0dB

rt0dB

0dB

2AdB

-z

'l0dB

2AdB

40d

B

30d

a

40d a

40d

B

60d

B

Tape

hiss

60d B

80d

B

80dB

Encoding/decoding

process