Toshiba PC-E70 Manual de usuario

TOSHIBA

STEREO

CASSETTE

DECK

PC-E/0

Tape

Transport:

Mottor:

Wow

&

Flutter:

9

Rewind/fast-forward

Time:

Frequency

Response:

:

“30°°Hz

—

15,000

He

for

Power

Consumption:

~

30:Hz

=

12,500Hz

for

|

“Record/playback

head:

.

~.0.04%WTD,

RMS

Saas

VOLE

EE

Specifications

=

-|Dolby

NR

Effect:

AP

(super-hard

petmalioy)

pein

Bee

head

x1

Erase

head:

AF

"

gap.

ferrite)

head

x

Lick

:

Dua!

motor.

Ic

legie

contcel

Capstan

drive:

2

DC

servo

motor

x1

Reel

drive:

DC

motor

x1

Output

Level:

-

iPower

Suaoly:

+0.15%(DIN)

Approximately.

70

seconds

»

(C-60)

°°

30°

Hz

17,000.

ie

For

chrome

type

tapes

;

j

~

at

--20

dB:

normal

tapes

at

-20

dB.

|Dimensicns:

__

metal

tapes

at

0dB-

pecifications

are

subject

to

change

without

noti

~ERVICE

DATA

FILE

NO.

100-135

‘5

dB

improvement

at

1

KHz}

10dB

improvement

above

|

»5

KHz

0.6%

at

400

Hz

with

metal

“tape.

°

a

“MIC:

©

0.25mV

(6002

—10KQ)

LINE:

70mV

(50KQ2).

LINE?

0.4V

(SOKO).

os

PHONES:

0.5mW

(8Q)°.

AC

240V

D0

Hz»

(for.

U.K.

‘and

Australia)

AC

220V

~V,

60

Hz

‘(for

=<

European.

Countries.

except

the

U.K.)

~

AC

115/230V.~

50/60

H

Hz’

(for

Middle

East,

Asia

and

South

Amiatice).

Bus

33W

ie

_

420(W).

x

110(H)

x

280(0)

oes

mm

{including

‘k

bs

and

ta

TE,

TU,

AY,

VF

PC-E70

|

CONTENTS

42

{PRARURES.

all

ocx

ae

oe

Lad

Lasoo

shoe

ewe

eens

ead

Tare

oes

1

S..

BLOCK

DIAGRAM:

44.42

uwaidesed

ts

cake

Rene

amen

S24

shies

alah

OL

ahah

Bhs

Ries

©

mati

Sanne

1

3.

OPERATINGCONTROLS............

eRe

ee

Pee

ne

ee

a

ener

eer

2to5

4.-

DISASSEMBICY

INSTRUCTIONS...

6

cindeccannk

aie

leceenews

Saasaen

ee

Lovee

Se

hs

6

to7

x

WADIWST

MENTS

taica

ook

Pe

Seow

tis

bine

rear

anne

se

eee

ee

ete

ie

8

to

9

6.

ELECTRICAL

PARTS

LOCATIONS

.........-

Det

aclo'

eoeawehaseiites

Det

aie

Smet

cigs

Ml

RAPS

coat

10

F<

SCHEMATIC

DIAGRAM

ciel

8

Scena

uierradne

see

oe

Tee

RET

Es

PEM

TSE

eS

11

8

“MECHANICAL

PARTS

LOCATIONS:

..c0.0c¢s..¥abe

ta

eye

Staice

bend

aet

tones

teses

12

6.

“CABINET

PARTS

LOCATIONS

on

s5

Saciewkse

way

dh

tee

testes

eee

pao

Goes

13

SO

(BARE

LIET

acetic

ei

cwhonak

Grnie

oe

edb

len

KA

ae

Be

Pama

Fe

hE

dee

Ee

aM

14

to

19

1.

FEATURES

@

Two-motor

IC

logic

control

system.

METAL

tape

capability

and

super

AP

heads—the

hyperbolic

head

surface

assures

stable

tape

contact

for

all

tape

types.

The

result

is

excellent

recording/play

back

performance.

Newly

developed

pause/mute

function

allows

precise

control

of

non-recorded

spaces

between

recordings.

Tape

transport

control

buttons

light

for

clear

identification

of

mode

even

from

a

distance.

LED

peak

meters.

Auto-repeat

playback.

Timer

recording

and

timer

playback

(timer

optional).

Remote

control

(remote

control

unit

optional).

Dolby*

NR

System.

2.BLOCK

DIAGRAM

LINE

IN

(Lh)

Oey.

ircuit

isoprene

Meter

(L

ch)

LINE

OUT

Record

Wen)

/Playback

Head

{L

ch)

Headphone

AMP.

Record

AMP.

>

—

=

Jack

Record

AMP.

LL

Record

ree

/Playback

5S

i

tee

7b

~P

proyoacs

jaybac!

(R

ch)

AMP.

Headphone

AMP.

77

r

a

=

ze

eae

|

Power

MF

2

Microphone

y

LINE

CUT

|

Seatch

Swit

lrg

Tir

ch)

witc

witcn

'

ee

py

AMP:

se

DOLBY

Timer

230Ve—q

115V

a

Circuit

Seiten

iG

°

a

LINE

IN

Erasure

Ie

et

:

(R

ch)

Y®

Prevention

med

|

”

Switch

ee

|

}—

|

ahi

wiekces

|

W1§V7230V|

ASO

Detect

yi

pers

|

SOH2z/60H2

vo

!

(

;

Logic

Control

Circuit

é

didd

d

c

>

!

Sa

—

i

———,

TY

as

Remote

Control

|

WY

Jack

Reel

L

ood

Gi)

To

Solenoid

Motor

nila

Power

Switch

-

—

-—-——

=

T

Y

Tape

Detect

Capstan

ee

9

E,A

|

Switch

Motor

=

|

LED

Meter

=

(|

<

l

1

aro

S0Hz

|

t

V/

SOHZ

Reguicted

Reguloted

[Se

see

+

Voltage

+B

Voltage

{

Tu

'

Circuit

j

re

1

-8

a

240W/50H2

Power

Transformer

Regula’

Voltage

Circuit

a

ee

Figure

1

3.

OPERATING

CONTROLS

:

FRONT

VIEW

COUNTER

RESET

Button

METAL

Indicator

Press

to

zero

the

counter.

DOLBY

Indicator

TAPE

COUNTER

Level

Meters

TIMER

Switch

Show

recording

and

playback

signal

levels.

Sets

the

auto-repeat

playback

mode

and

timer

actuated

recording

and

playback

functions.

(See

page

5

)

Cassette

Compartment

Lamp.

POWER

Switch

ine.

Cassette

EJECT

Button

a

_Only

operates

when

the

tape

transport

is

stopp-

|

‘ed.

f;

oO

©

~

+

i

eee

MIC

(Microphone

jacks)

—

DOLBY*

Noise

Reduction

Selector

PHONES

(Headphones

)

Socket

——

Selg-illuminating

Advanced

Logic

Controls

@

Stop

@

Record

@

Rewind

Figure

2

@

Play

©

Fast

Forward

Wind

©

Pause

Mute

.

BACK

VIEW

Interactive

logic

control

button

(See

page

4)

;

er

Terre!

meee

TT

ee

Sree

ean

Ren

eee

Voltage

Conversion

(VF)

a]

Loosen

two

screws

and

push

the

point

of

the

screw

in

the

arrow

direction,

then

the

voltage

can

be

changed.

TAPE

Type

Selector

RECORD

Level

Control

pescapesens

a,

LINE

IN/REC

Terminals

an

|

t

1

St

|

a

Screw

Up

(230V

>

115V)

Screw

Down

(115V

>

230V)

LINE

OUT/PLAY

a

ee

eee

ae

DO

assser]

Figure

3

*

Noise

Reduction

System

is

manufactured

under

licence

from

Dolby

Laboratories.

“DOLBY”

and

the

Double-D

symbol

are

Trademarks

of

Dolby

Laboratories

Inc.

Figure

4

Figure

5

Remote

Control

Socket

en

Recording

From

Radio,

Disc,

Another

Tape

Unit,

or

TV

(Numbers

refer

to

the

steps

below)

Figure

6

@

Set

the

TIMER

switch

to

OFF.

@

Switch

on

the

POWER.

.

®

Check

that

your

tape

heads

are

clean.

©

Set

up

the

source

that

you

plan

to

record—disc,

radio,

or

tape.

ee

ae

caaiit

3

@®

Insert

a

cassette—with

tab

for

the

side

you

will

record.

©

Set

the

TAPE

selector

to

the

tape

type

used:

NORM,

CrO2,

METAL]

or

FeCr.

The

indicator

will

light

for

metal

tape.

@

set

the

Dolby

NR

selector.

@Dolby

NR

recordings

have

reduced

tape-hiss

on

*”

playback.

:

DOLBY

NR

Dolby

System

off:

if

tapes

are

to

be

played

back

ona

deck

without

Dolby

NR.

Figure

7

or

microphone.

@

Press

the

PAUSE/MUTE

button

to

enter

PAUSE

mode.

@

Press

the

REC

and

PLAY

buttons

simultaneously.

The

PAUSE

and

REC

buttons

will

light.

@

Cue

up

the

cassette

tape:

If

recording

from

the

very

beginning

of

a

cassette

side;

turn

the

RECORD

level

control

completely

anticlockwise,

then

press

the

PAUSE/MUTE

button

momentarily.

The

tape

will

wind

on

past

the

leader,

and

any

will

be

erased.

After

several

seconds

press

the

PAUSE/MUTE

button

again.

@Note:

The

first

few

inches

of

tape

may

be

marked

in

manufacture

and

should

not

be

used

for

hi-fi

recording.

@

Play

the

source

(disc,

radio),

if

possible

at

the

joud-

est

part

of

the

programme,

and

set

the

RECORD

level

control

so

that

the

peaks

of

the

programme

signal

light

the

peak

level

meters

given

on

page

4.

Now,

the

PC-E70

is

ready

to

start

recording.

Cue

up

your

source

(disc,

tape,

etc.).

"os

®

Start

the

source

playing,

then

press

the

PC-E70

PAUSE/MUTE

button

momentarily.

Recording

will

start.

The

PLAY

and

REC

buttons

will

light,

and

the

PAUSE/MUTE

button

light

will

go

off.

8

Dolby

NR

(with

MPX

in!

titer)

to

record

from

FM

OUT,

Lee

stereo

radio

or

MPX

TV,

OFF

;

Dolby

NR

(without

MPX

filter)

to

record

from

disc

PC-E70

@®

Continue

to

observe

the

level

meters.

If

a

very

loud

passage

exceeds

the

correct

peak

levels,

reduce

the

recording

level

gradually

with

the

RECORD

level

control.

An

excessively

high

recording

level

will

cause

audible

distortion

on

playback.

Normally,

the

RECORD

level

control

should

not

be

moved

during

recording.

‘

®

To

stop

recording,

press

either

the

PAUSE/MUTE,

button

momentarily,

or

the

STOP

button.

Alterna-

tively,

the

REW

button

can

be

pressed

immediately

to

rewind

the

tape

ready

for

playback.

Microphone

Recording

(Numbers

refer

to

the

steps

below)

Figure

8

i

The

same

basic

procedure

as

for

recording

from

disc

or

radio

is

followed.

Set

the

TIMER

switch

to

OFF.

Switch

on

the

POWER.

Check

that

your

tape

heads

are

clean.

Insert

a

cassette—with

tab

for

the

side

you

will

record,

Set

the

TAPE

selector

to

the

tape

type

used

(see

“Recording

from

disc,’’

above).

Set

the

Dolby

NR

selector.

Plug

the

microphone(s)

into

the

MIC

jacks

on

the

front

panel.

.

Press

the

PAUSE/MUTE

button

to

enter

PAUSE

mode.

Press

the

REC

and

PLAY

buttons

simultaneously.

The

PAUSE

and

REC

buttons

will

light.

Cue

up

the

cassette

tape

(see

‘Recording

from

disc,”

above).

Position

the

microphones.

If

feedback

(a

whining

noise)

is

produced

from

your

speakers,

turn

down

your

amplifier

volume

control.

While

observing

the

level

meters,

set

the

RECORD

level

control

so

that

the

appropriate

peak

indicators

light

for

a

ioud

passage

of

sound.

Move

the

micro-

phones,

if

necessary,

to

obtain

optimum

and

consist-

ent

recording

leveis.

Leave

the

RECORD

level

control

set

throughout

a

recording

if

possible,

or

adjust

gradually.

@®

To

start

recording,

press

the

PAUSE/MUTE

button

momentarily.

The

PLAY

and

REC

buttons

will

light,

and

the

PAUSE/MUTE

button

will

go

off.

®

Continue

to

observe

the

level

meters

to

ensure

that

the

peaks

do

not

overload

(see

page

4).

@

@6

6

©

89

&

6806

PC-E70

@

To

stop

recording,

press

the

PAUSE/MUTE

button

momentarily,

or

the

STOP

button

or

REWIND

button,

depending

on

the

required.

Fade-up

Start

A

professional-sounding

fade-up

start

can

be

easily

achieved.

Note

the

exact

position

of

the

RECORD

level

control

in

step

@

,

then

before

step

@

,

set

the

RECORD

level

control

to

zero.

Just

after

pressing

the

PAUSE/MUTE

button

in

step

@

,

smoothly

turn

the

RECORD

level

control

up

to

the

correct

position.

Setting

the

Recording

Level

The

correct

recording

level

depends

considerably

on

the

type

of

tape

used

and

the

program

material

being

recorded.

The

correct

tape

type

and

recording

level

should

be

selected

to

give

the

best

frequency

response

yet

lowest

noise

level.

For

the

following

three

tape

types,

the

RECORD

level

control

should

be

set

so

that

the

peak

level

meters

light

at

the

loudest

passage

of

that

program

selection:

Tape

type

Peak

level

meters

NORMAL

(ferric)

tape

—3

dB

or

0

dB

CHROME

tape

0

dB

or+3

dB

METAL

alloy

tape

+3dBor+5dB

The

high

frequency

response,

in

particular,

depends

considerably

on

the

type

of

tape

and

the

recording

level.

Metal-alloy

tape,

for

instance,

provides

better

high-

frequency

response

than

normal

tape,

thus

giving

much

better

reproduction

of

higher

pitched

instruments

and

voices.

This

is

illustrated

in

Figure

9.

For

the

same

tape,

type

at

lower

recording

levels,

there

is

better

higher-frequency

response

as

shown

in

Figure10.

So,

to

record

program

material

which

contains

consider-

able

high-frequency

sound,

set

the

recording

level

somewhat

lower.

The

level

meter

on

the

PC-E70

is

an

electronic

‘‘digital’’

indicator,

which

displays

the

peaks

of

the

signal,

in

red

over

0

dB

and

in

green

below.

This

allows

very

precise

setting

of

the

recording

level.

The

Dolby

mark

[iQ]

and

the

‘adres’

mark

[AD]

indicate

the

Dolby

an

‘adrescalibration

positions,

respectively.

The

‘adres)

mark

is

for

use

when

the

tape

deck

is

con-

nected

to

an

‘adres’

unit.

The

(adres)

system

is

Toshiba’s

new

noise

reduction

and

dynamic

range

expansion

system.

Metal

tape

Chrome

tape

Level

Normal

tape

High-frequency

Response

(Hz)

Figure

9

Frequency

Response

Curves

for

Different

Types

of

Tape

Recording

level

set

to

+10

dB

Recording

level

set

to

0

dB

Recording

level

set

to

-10

dB

Level

High-frequency

Response

(Hz)

Figure

10

Frequency

Response

Curves

at

Different

Recording

Levels

Mute

Recording

After

recording

a

piece

of

music,

you

may

want

to

create

a

short

silent

space

before

further

recording.

The

advanced—logic

MUTE

feature

of

the

PC-E70

allows

you

to

do

this

easily

and

professionally.

At

the

end

of

a

recording,

tape

transport

is

normally

stopped

by

pressing

the

STOP

button

or

the

PAUSE/-

MUTE

button

momentarily.

If,

however,

the

PAUSE/-

MUTE

button

is

pressed

and

held

in

during

recording,

the

tape

continues

to

run

but

will

be

erased.

When

the

button

is

released

,

the

tape

will

stop

in

record

standby

made

ready

to

continue

recording.

To

start

recording

again

press

the

PAUSE/MUTE

button

a

second

time;

when

the

PAUSE/MUTE

button

is

released

,

recording

will

start.

The

PAUSE/MUTE

button

therefore

serves.a

dual

purpose:

record

mute

and

pause.

For

proper

operation

follow

the

steps

given

in

the

table

just

below:

@

Releasing

the

pause

mode

This

is

illustrated

below.

To

restart

recording,

@®

Making

a

non-recorded

gap

momentarily

press

the

A

non-recorded

gap

can

button

again.

be

created

by

press-

ing

and

hoiding

the

PAUSE/MUTE

button

PAUSEINUTE

during

recording.

When

the

button

is

released,

|

the

tape

stops

in

the

button

operations

|

Pause

mode.

i

no

Hor

,H#o,

oO

SFAe

be

oe)

(a

a

ye

=

Zl}

z

=

“Pits

AVR

hN

Press

Release

Press

momentarily

Non-record-

iy

Tape

ee

el

adses

|

Ui,

YY

record

mode

Record

mute

_‘

Tape

transport

starts.

stops.

Recording

starts

again.

Figure

711

@When

the

button

is

pressed

during

playback,

only

the

pause

func-

tion

operates.

The

PAUSE/MUTE

button

is

not

effective

in

the

fast-

forward

and

rewind

modes.

PLAYBACK

Normal

Playback

(Numbers

refer

to

the

steps

below)

OO

EET

TOTTORI

ESS

he

i

ei

a

AC

Figure

12

b6

de

@

Set

the

TIMER

switch

to

OFF.

@

Switch

the

POWER

on.

©

Take

up

any

slack

in

the

cassette

to

be

played.

@

insert

the

cassette

with

the

play

side

facing

you.

@

Set

the

TAPE

selector

for

the

tape

type:

NORM,

CrO2,

[METAL],

or

FeCr.

@

Set

the

Dolby

NR

switch

to:

IN

for

tapes

recorded

with

Dolby

NR.

OUT

for

other

tapes.

Note:

The

IN

and

MPX

OFF

positions

give

the

same

operation

in

playback.

@

Press

the

REW

button

to

wind

to

the

beginning

of

the

tape,

or

the

FF

button

to

Fast-Forward

wind

to

a

later

selection.

@

Set

the

volume

control

on

your

amplifier

to

a

reasonable

position,

and

set

the

monitor

(and

tape)

switches

on

your

amplifier

correctly.

@

Press

the

PLAY

button

to

start

playback.

The

PLAY

button

lights.

@

To

gofrom

playback

to

another

mode,

the

PAUSE/-

MUTE,

REW,

FF

or

STOP

buttons

may

be

pressed

directly.

@

At

the

end

of

the

tape,

playback

will

automatically

stop.

Auto-repeat

Playback

The

PC-E70

can

play

a

tape

then

automatically

rewind

to

the

beginining

and

start

playback

again

repeatedly.

Or

it

can

rewind

first,

then

start

auto-repeat

playback.

@

Switch

on

the

POWER.

@

Followsteps

3

to

6

of

Normal

Playback,

above.

©

set

the

TIMER

switch

to

PLAY

REPEAT.

@

(A)

For

Playback—rewind—playback:

Press

the

PLAY

button.

(B)

For

rewind—play—rewind:

Press

the

REW

button.

@®

To

stop

auto-repeat

playback,

press

the

STOP

button.

;

:

Note:

If

the

TIMER

switch

is

left

in

the

PLAY/-

REPEAT

position

when

the

deck

is

switched

off.

Auto-repeat

playback

will

start

auto-

matically

when

the

POWER

is

on.

PC-E70

TIMER

RECORDING/PLAYBACK

The

TIMER

switch

should

normally

be

set

to

OFF

before

the

POWER

is

switched

on.

With

the

TIMER

switch

in

the

REC

or

PLAY

positions,

when

power

is

switched

to

the

deck

either

at

the

POWER

switch

or

by

an

external

audio

timer,

recording

or

playback

will

start

automatically.

Note

that

the

audio

timer

must

also

switch

on

and

off

the

power

to

the

otner

hi-fi

compo-

nents.

When

the

end

of

a

tape

is

reached

during

unattended

recording

or

playback,

the

tape

stops

and

the

tape

transport

is

automatically

disengaged.

However,

the

power

to

the

deck

and

your

stereo

system

will

remain

on,

causing

unnecessary

power

consumption

and

pos-

sible

danger.

To

avoid

this,

it

is

advisable

to

use

an

audio

timer

that

automatically

switches

the

power

to

tne

system

both

on

and

off.

Timer

Recording

1

Set

up

the

cassette

deck

and

amplifier,

tuner,

etc.

for

normal

recording:

@

Set

the

TIMER

switch

on

the

PC-E70

to

OFF.

@

Switch

on

the

POWER.

@

Insert

a

cassette

with

a

tab

on

the

side

to

be

recorded.

@

Set

the

TAPE

selector

and

Dolby

NR

selector.

©

Precisely

tune

to

the

desired

radio

station.

@

Preset

the

recording

level,

after

pressing

the

PAUSE/MUTE

then

the

REC

and

PLAY

buttons.

2

Set

the

audio

timer

to

the

desired

recording

start

time,

and

also

set

it

to

switch

off

the

power

to

the

system.

3.

Leave

the

PC-E70

POWER

switch

on.

4

Set

the

TIMER

switch

to

REC.

When

the

time

preset

on

the

audio

timer

is

reached,

the

audio

system

power

will

be

turned

on,

and

automatic

recording

will

start.

Note:

Set

the

TIMER

switch

to

OFF

when

automatic

recording

has

been

completed.

If

the

TIMER

switch

is

accidentally

left

in

the

REC

position,

a

portion

of

a

recorded

tape

may

be

unintentionally

erased

when

the

power

is

switched

on.

Timer

Playback

(for

morning

alarm,

etc.)

1.

Play

the

tape

to

be

used

for

the

morning

alarm

and

adjust

the

amplifier

volume

control

to

a

suitable

volume

level.

2.

Set

the

audio

timer

to

the

desired

alarm

time,

and

also

set

it

to

switch

off

the

power

to

the

system.

3.

Set

the

tape

deck

TIMER

switch

to

the

PLAY

position.

When

the

preset

alarm

time

is

reached,

the

tape

deck

will

automatically

start

playback.

Note:

When

playback

starts

the

PC-E70

will

play

in

the

auto-repeat

mode

until

stopped.

When

the

auto-

repeat

mode

is

no

longer

required,

set

the

TIMER

switch

to

the

OFF

position.

PC-E70

|

4.

DISASSEMBLY

INSTRUCTIONS

2

en

Top

Cover

Removal

.

1.

Remove

four

screws

(A)

and

(B)

from

each

side

of

a

:

Top

Cover

(See

Figure

13

and

14)

2.

Remove

two

screws

(C)

from

rear

panel

of

unit.

(See

Figure

15)

3.

Lifting

the

Top

Cover

upright,

pull

it

back

wards

and

the

Top

Cover

can

be

removed

out.

e

(A)

¢

net!

met

gee

ee

wee

OS

mm

5

anna

Figure

14

Figure

13

Ceca

eeystid

Satie

teh

gh

aha

OH OF

DP

RERE

PAREN

ELSE

IRN

,

Bottom

Cover

Removal

1.

Remove

the

Top

Cover.

:

2.

Remove

five

screws

(D)

from

the

bottom

plate.

(See

Figure

16)

2

3.

Remove

two

screws

(E)

from

side

of

the

unit.

(See

:

F

Figure

15

Figure

17)

4.

Bottom

Plate

can

be

removed

from

the

unit.

Figure

16

F

(E)

Figure

17

Cassette

Cover

Removal

1.

Push

the

eject

button

to

open

the

cassette

cover.

2.

Press

the

top

and

bottom

of

cassette

cover

with

fingers,

and

upward

in

direction

of

the

arrow

direc-

tion

(F).

Then

the

Cassette

cover

can

be

removed

from

unit.

(See

Figure

19)

aibidi

(

OO8

Figure

18

Figure

19

TATA

ITIL

WARS

eae

SSR

owt

tl

SE

a

A

eh

ORS

NE

ners

ree

=

Front

Panel

Removal

of

1.

Remove

the

top

and

cassette

cover.

a

2.

Remove

the

three

knobs

(G).

(See

Figur

20)

z

:

3.

Remove

thirteen

screws

(H)

and

(I).

(See

Figure

21

and

22)

*

4.

Front

panel

can

be

removed

from

unit.

®

(H)

g

()

(G)

Figure

21

Mechanism

Assembly

Removal

Figure

22

1.

Remove

cassette

cover.

2.

Remove

six

screws

(J)

and

(K)

(See

Figure

23

and

24)

3.

Remove

the

one

leg(L)from

the

chassis

then

mechanism

assembly

can

be

removed.

g

(J)

(L)

Figure

24

PC-E70

5.

ADJUSTMENTS

S|

R428

TP24R

~

TP24L

Z602_

nase

©]

zao2

R427

|

=)

[Q]

z401

Q419

fe

sit

Figure

25

TEST

EQUIPMENTS

1.

VTVM

(Vacuum

Tube

Voltmeter)

2.

Signal

Generator

3.

Resistance

Attenuator

4.

Screwdriver

RECORD/PLAYBACK

HEAD

ADJUSTMENT

Erase

Head

Adjusting

Screw

Head

Azimuth

Adjusting

Screw

Adjust

for

Maximum

Output.

Figure

26

ERASE

HEAD

HEIGHT

ADJUSTMENT

1.

Temporaily

mount

the

erase

head

so

that

it

will

be

even

by

eye

measurement.

2.

Set

in

PLAY

position

with

setting

a

mirrow

cassette

tape,

MC-09C.

3,

Adjust

the

height

adjusting

screw

so

that

the

upper

edge

of

the

tape

will

touch

at

the

upper

tape

guide

of

the

erase

head.

See

figure

28.

4.

Confirm

whether

the

upper

edge

of

the

tape

is

not

Curled.

5.

Test

Tapes:

MTT-114

(10

kHz)

MTT-150

(400

Hz)

AC-511

(CHROME

TAPE)

Upper

Guide

Figure

27

Touch

Here

Curled

Tape

——

Sith

=

1.

Tape

——

Exon

ae

Figure

28

OK

5.

Paint

the

adjusting

screw

with

lock

paint.

P.S.

When

the

mirror

cassette

is

not

available,

please

re-

model

a

normal

tape,

type

C-90

as

shown

below.

See

figure

29.

Figure

29

t

‘i

’

4

i

3

*

|

PC-E70

|

ADJUSTMENT

PROCEDURES

Description

Nominal

‘Test

Volume

Control

Adjustment

Test

Freq.

|

Specs

Tape

|

REC

|

TAPE

|

DOLBY

Posints

Points

ATT

1

Head

Azimuth

Adjustment

MTT-111

OUT

|

Head

Azimuth

|

LINE

OUT

Adjustment

After

Adjustment

lock

with

screw

point.

Screw

2

’

TApe

Speed

Measurement

00030

Hz|

MTT-111

OUT

Semi-fixed

LINE

OUT

.

resister

in

the

Playback

Sensitivity

580

+

10mV|

MTT-150

OUT

LINE

OUT

Adjustment

Playback

Frequency

Response

MTT-215C

OUT

LINE

OUT

:

SS

Measurement

(Normal)

7

10

Khz

Level

difference

for

315

Hz

Playback

Frequency

Response

4

+2

dB

|MTT-215C

NOR OUT

LINE

OUT

Measurement

(Chrome)

ae

Change

for

10

KHz

Normal

tape

Output

Noise

Level

Under

.

{Blank

Tape

OUT

2.0mV

Line

Input

Level

Adjustment

|

580+

10mV

Adjustment

CrO2

OUT

LINE

OUT

400

Hz

REC.

Volume

adjustment

must

be

kept

—17

dB

till

frequency

response

adjustment

9

Meter

Adjustment

Meter

Indi.

|

CrO2

OUT

R525,

526

LED

Meter

|

400

Hz

—17

dB

Lee

OOD

sol

oo

Pesan

dh

eas

a

Mees

Was

fer

a

ead

he

eke

OPS

oe

cto

ts

GA

Meter

Indi.

CrO2

-|

OUT

LED

Meter

|

400

Hz

—23

|

—23

+0.5

dB

Record

Playback

Frequency

O+2

AC-512

LINE

OUT

400

Hz

to

c

Response

Adjustment

—0

Power

Supply

TE:

220V

VF:

230V

TU,

AY:

240V

©

Input:

0

dB=

1V

rms

@

LINE

IN

(Input

Impedance):

600

ohm

@

LINE

OUT

(Load

Impedance):

47

K

ohm

®

Test

Point

Load

Impedance:

No

Load

|

10

kHz

|

—

40

dB

LINE

OUT

400

Hz

—

17

dB

R511

R512

11

Record/Playback

Sensitivity

Adjustment

Measurement

Condition

(Bias

Lead

Adjustment)

TP24L

|

ve

‘

2401

3.

Ae

ene

te)

(

Playback

Sensitivity

Adjustment)

(Line

Input

Adjustment)

R/P

Head

(L)

LINE

IN

‘Test

Tape

(MTT-150)

Resistance

Attenuator

—17dB

Signal

Generator

400Hz

R/P

Head

(R)

SO

°}

Figure

31

VTVM

R415

Figure

30

TP24R

LINE

IN

7

(Rec/Play

Sensitivity

Adjustment)

Resistance

Attenuator

—17dB

400Hz

\

Signal

Generator

LINE

IN

LINE

VTVM

LINE

IN

Figure

33

(Rec/Play

Frequency

Response

Adjustment)

7

Generator

Attenuator

4ooHziokrz

49-40

dBV

>

nd

(~)

<b

Ras2

LINE

yt

LINE

IN

=

200K

UT

Figure

34

VTVM

Figure

32

PC-E70

6.

ELECTRICAL

PARTS

LOCATIONS

O65!

Emitter

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a

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Emitt

Q622

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Toshiba PC-E70 Manual de usuario

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