Teac X-3 Manual de usuario

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1

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TEAC,

SERVICE

MANUAL

X-3

Stereo

Tape

Deck

Effective:

Septernber,

1980

A00013

5719006600

X-3

1

SPECIFICATIONS

AND

SERVICE

DATA

SPECIFICATIONS

Track

System

4-Track

Two-Channel

Stereo

Head

System

3

heads:

erase,

record,

playback

Reel

Size

7”

and

5”

Tape

Speed

19

cm/s

(7-1/2

ips)

and

9.5

cm/s

(4-3/4

ips)

Inputs

(level

and

impedance)

MIC:

Specified

input

level:

-60

dB

(0.775

mV)/10

kohms

Min.

input

level:

—70

dB

(245

nV)

LINE

IN:

Specified

input

level:

—12

dB

(195

mV)/100

kohms

Min.

input

level:

—22

dB

(61.5

mV)

Outputs

(level

and

impedance)

OUTPUT:

Specified

output

level:

—5

dB

(436

mV)/10

kohms

Max.

OUTPUT

level:

+1

dB

(0.869

V)

PHONES:

Specified

OUTPUT

level:

—24

dB

(48.9

mV)/8

ohms

Playback

Equalization

19

cm/s:

3,180

us

+

50

us

(NAB)

9.5

cm/s:

3,180

us

+

90

us

(NAB)

Motors

1

DC

Servo

Capstan

Motor

2

induction

Reel

Motor

Bias

Frequency

100

kHz

Operating

Position

Vertical,

horizontal

Power

Requirements

100/117/220/240

V

AC,

50/60

Hz,

85

W

(General

Export

Model)

117

V

AC,

60

Hz,

70

W

(USA/Canada

Model)

220

V

AC,

50

Hz,

85

W

(Europe

Model)

240

V

AC,

50

Hz,

85

W

(UK/AUS

Model)

Weight

14

kg

(30-14/16

Ibs)

net

9-1/8"

(231mm)

14°(355

mm)

12-7/8"

(326mm)

ca

tacos

i=

ey

O

Oooo010O

16-1/8"

(410mm)

Fig.

1-1

Dimensions

SERVICE

DATA

MECHANICAL

Tape

Speed

Deviation

Tape

Speed

Drift

Wow

and

Flutter

3,000

Hz

+30

Hz

20

Hz

Playback:

0.06%

(WRMS),

0.12%(RMS)

at

19

cm/s

0.10%

(WRMS),

0.15%

(RMS)

at

9.5

cm/s

Record/Playback:

0.08%

(WRMS)

at

19

cm/s

0.15%

(WRMS)

at

9.5

cm/s

Pinch

Roller

Pressure

1.8

~

2.2

kg

(3.97

~

4,85

(Ibs)

Reel

Torque

(Play

mode)

Take-up

330

~

470

g-cm

(4.58

~

6.53

oz-inch)

Back

tension

220

~

280

9-cm

(3.06

~

3.89

02-inch)

Brake

Torque

Forward

direction:

1000

~

1300

g-cm

(13.9

~

18.1

oz-inch)

Reverse

direction:

500

~

700

9-cm

(6.94

~9.72

oz-inch)

Left/right

deviation:

200

g-cm

(2.78

oz-inch)

Fast

Winding

Time

140

seconds

or

less

for

550

m

(1800

feet)

ELECTRICAL

Frequency

Response

Playback:

19

cm/s

40

Hz

+3,-3dB

9.5cm/s

40 Hz

+3,-3dB

400

Hz

OdB

(Ref.)

400

Hz

OdB

(Ref.’

20

kHz

+3,

—3

dB

14kHz

+3,-3dB

Overall:

(BIAS

sw:

1,

EQ

sw:

1)

19cm/s

40

Hz

+3,—3dB

400

Hz

0

dB

(Ref.)

16

kHz

+3,

-3dB

20kHz

+3,—4dB

Signal

to

Noise

Ratio

Playback:

49

dB

min.

at

19

cm/s

47

dB

min.

at

9.5

cm/s

47

dB

min.

at

19

cm/s

45

dB

min.

at

9.5

cm/s

Erase

efficiency

70

dB

min.

at

1

kHz

(measured

with

input

10

dB

higher

than

the

specified

input

level)

Channel

Separation

50

dB

min.

at

1

kHz

Adjacent

Track

Crosstalk

40

dB

min.

at

125

Hz

Total

Harmonic

Distortion

1.5%

or

less

at

1

kHz

Overall:

NOTES:

e

Improvements

may

result

in

SPECIFICATIONS

AND

SERVICE

DATA

changes.

e

Value

of

“dB”

in

the

data

refers

to

0

dB

(0.775

V),

except

where

specified.

CAUTION

Z\

Parts

marked

with

this

sign

are

safety

critical

components.

They

must

always

be

replaced

with

identical

components

—

refer

to

the

TEAC

parts

list

and

ensure

exact

replacement.

9.5cm/s

40

Hz

+3,—-3dB

400

Hz

OdB

(Ref.

10

kHz

+3,—-3

dB

14

kHz

+3,-4dB

7

2

MECHANICAL

ADJUSTMENTS

AND

CHECKS

2-1

CAPSTAN

THRUST

CLEARANCE

1.

There

must

be

a

clearance

of

0.1

to

0.3

mm

between

the

capstan

shaft

and

the

thrust

plate.

Check

to

see

that

the

clearance

is

within

this

range.

If

not,

loosen

the

two

screws

on

the

flywheel,

adjust

the

clearance,

and

retighten

the

screws.

Capstan

Shaft

Adjust

two

screws

Thrust

Plate

with

Allen

wrench

Fig.

2-1

2-2

SHUT-OFF

SWITCH

POSITION

1.

There

must

be

a

clearance

of

1

to

1.5

mm

between

the

cam

and

actuator(A)

when

the

microswitch

is

off,

and

0.5

mm

between

the

micro

switch

and

actuator(B)

when

the

microswitch

is

on.

Check

to

see

that

the

clearance

is

within

these

values.

If

not,

adjust

as

necessary.

Adjust

Screw

Micro

Switch

Actuator

(B)

Actuator

(A)

Adjust

Screw

2-3.

BRAKE

MECHANISM

NOTE:

Be

sure

that

the

power

is

turned

off

prior

to

making

any

ad-

justments

to

the

brakes.

1.

Screw(A)

for

the

left

brake

(as

viewed

from

the

front)

must

be

adjusted

so

that

there

is

a

clearance

of

1

mm

between

lever(C)

and

lever(E).

Screw(A)

for

the

right

brake

must

then

be

adjusted

so

that

lever(B)

is

parallel

to

lever(C).

2.

Push

the

plunger

until

there

is

contact

at

(a);

i.e.,

until

the

clear-

ance

has

been

eliminated,

but

make

sure

that

the

plunger

is

not

pushed

so

strongly

that

the

levers

(E),

(C),

and

(B)

are

deflected

—

they

must

remain

in

a

horizontal

plane.

3.

Position

the

solenoid

housing,

while

the

plunger

is

pushed

as

des-

cribed

in

step

#2

above,

so

that

the

gap

at

(f)

(the

distance

be-

tween

the

leftmost

edge

of

the

plunger

and

the

leftmost

edge

of

the

solenoid

housing)

is

between

11

to

12

mm.

When

the

solenoid

housing

is

so

positioned,

the

plunger

should

be

able

to

be

de-

flected

between

1

to

2

mm

when

pushed

strongly.

Brake

Solenoid

Adjut

Solenoid

Position

(f)=

11

~

12mm

PUSH

Plunger

Lever

(E)

Left

Reel

Table

Fig.

2-3

X3

24

BRAKE

TORQUE

NOTE:

Before

making

any

brake

adjustments

or

measurements,

make

sure

the

power

is

off.

.

Mount

an

empty

7”

reel

onto

either

reel

table

and

attach

a

spring

scale

to

the

reel

with

a

string.

.

Smoothly

pull

the

scale

away

from

the

reel

under

test

and

note

the

torque

value

when

the

reading

on

the

scale

is

steady.

The

proper

torque

values

are

given

in

the

chart

below.

.

Follow

steps

1

and

2

for

each

measuring

condition;

i.e.,

(A)

through

(D)

in

Fig.

2-4.

.

If

the

forward-direction

torque

is

not

correct,

change

the

hook-

ing

position

of

the

spring

hanger

(reference

(D)

in

Fig.

2-3)

for

the

corresponding

brake

requiring

adjustment.

If,

after

the

for-

ward-direction

torque

has

been

properly

adjusted

and

the

reverse-

direction

torque

is

not

correct,

or

the

forward-direction

torque

is

still

not

correct,

check

to

see

if

the

brake

felt

pad

is

worn,

and

also

check

that

the

brake

mechanism

is

properly

aligned

as

ex-

plained

in

Section

2-3,

‘Brake

Mechanism”.

If

necessary,

replace

the

entire

reel

table.

A

B

o

o

a

con

ne

Radius

1000

—

1300

g-cm

(13.9

—

18.1

oz-inch)

500

—

700

g-cm

Reverse

direction

(A)

(D)

.

(6.94

—

9.72

oz-inch)

200

g-cm

Left/Right

deviation

:

(2.78

oz-inch)

Torque

calculating

formulas:

1.

Torque

{in

g-cm

or

oz-inch)

=

Force

or

Weight

(in

g

or

oz)

x

Radius

(in

cm

or

inch)

2.

Conversion

of

g-cm

to

02-inch:

g-cm

x

0.0139

=

02-inch

Fig.

2-4

2-5

REEL

MOTOR

TORQUE

(See

Fig.

2-5)

NOTE:

For

torque

calculation,

refer

to

the

formulas

above.

2-5-1

TAKE

UP

TORQUE

1.

2.

Hold

the

right

tension

arm

up

using

a

rubber

band.

Mount

an

empty

7”

reel

onto

the

take-up

(right)

reel

table,

and

attach

a

spring

scale

to

the

reel

with

a

string.

.

Place

the

deck

in

the

play

mode.

Allow

the

rotation

of

the

reel

to

slowly

pull

the

scale

toward

the

reel.

Hold

the

spring

scale

with

enough

force

to

allow

steady

reading.

The

proper

value

is

between

330

g-cm

(4.58

oz-inch)

to

470

g-cm

(6.53

oz-inch).

There

is

no

specially-provided

adjustment

for

take-up

torque,

so

if

correction

is

needed,

repair

or

replace

the

defective

part

and/

or

circuit.

t

|

Back

Tension

Spring

Scale

|

Take

Up

Force

Radius

Fig.

2-5

2-5-2.

BACK

TENSION

1.

2.

Hold

the

right

tension

arm

up

using

a

rubber

band.

Mount

an

empty

7”

reel

onto

the

supply

(left)

reel

table,

and

at-

tach

a

spring

scale

to

the

reel

with

a

string.

.

Place

the

deck

in

the

play

mode.

.

Using

a

steady,

smooth

motion,

pull

against

the

motor

torque

to

draw

the

scale

away

from

the

reel.

.

After

making

sure

that

the

reel

motion

is

smooth

(the

string

should

not

be

rubbing

against

the

reel

flanges),

note

the

value

in-

dicated

on

the

scale.

.

The

proper

value

is

between

220

g-cm

(3.06

02-inch)

and

280

g-cm

(3.69

oz-inch).

.

If

necessary,

adjust

the

slider

of

the

resistor

(R802)

until

the

proper

torque

value

is

obtained.

See

Fig.

2-6.

Resister

(R802)

Slider

2-6

PINCH

ROLLER

PRESSURE

1.

Hold

the

right

tension

arm

using

a

rubber

band,

string,

etc.

2.

Place

the

deck

in

the

play

mode

without

threading

any

tape.

3.

Attach

a

spring

scale

to

the

pinch

roller

as

shown

in

Fig.

2-7,

4.

Pull

the

pinch

roller

away

from

the

capstan

shaft

(on

a

plane

intersecting

the

center

of

the

capstan

shaft

and

the

pinch

roller)

until

the

capstan

shaft

and

the

pinch

roller

are

separated.

5.

Ease

pressure

on

the

scale

until

the

pinch

roller

just

begins

to

turn.

The

scale

should

then

be

read

1.8

kg

to

2.2

kg

(3-15/16

Ibs

to

4-7/8

Ibs).

Adjust

Screw

Pinch

Roller

Spring

Scale

Fig.

2-7

X-3

2-7

REEL

TABLE

HEIGHT

1.

As

a

general

reference,

the

height

of

the

reel

table

should

rough-

ly

correspond

to

a

distance

of

38

mm

(1-7/16’)

between

the

chassis

of

the

deck

and

the

rubber

mat

on

the

reel

table.

If

check-

ing

reveals

any

large

deviation

from

this

value,

loosen

the

two

ad-

justment

screws

on

the

reel

table,

adjust

the

height,

and

retight-

en

the

screws.

.

For

fine-adjustment,

check

that,

while

in

fast-forward

(forward

direction)

or

rewind

(reverse

direction)

modes

starting

at

the

be-

ginning

of

the

tape,

the

tape

does

not

touch

the

upper

or

lower

reel

flanges,

If

it

does,

fine-adjust

accordingly.

Standard

Empty

Reel

ft}

fl

Reel

Table

Fig.

2-8

2-8

TAPE

SPEED

1.

Connect

a

frequency

counter

to

either

OUTPUT

jack.

(See

Fig.

2-9).

.

Load

a

TEAC

YTT-2003

test

tape

containing

a

3000-Hz

test

tone,

and

set

the

SPEED

switch

to

HIGH

(19

cm/sec

or

7-1/2

ips).

.

Play

the

middle

of

the

test

tape

and

adjust

the

HIGH

speed

trim-

mer

resistor

until

the

frequency

counter

indicates

a

reading

of

3000

Hz.

See

Fig.

2-10.(CAUTION:

Use

an

insulated

screwdriver

to

prevent

shorting.)

.

Playing

the

tape

at

both

the

beginning

and

the

end,

check

that

the

tape

speed

does

not

vary

any

more

than

the

limits

prescribed

in

the

specifications,

so

that

there

is

never

a

total

deviation

of

more

than

+30

Hz

from

the

3000-Hz

test

tone,

nor

a

drift

of

more

than

20

Hz

at

any

given

time.

.

Using

a

TEAC

YTT-2002

test

tape,

repeat

steps

#3

and

#4

above

with

the

SPEED

switch

set

to

LOW

(9.5

cm/sec

or

3-3/4

ips).

In

step

#3,

the

speed

may

be

adjusted

for

the

proper

initial

setting

by

using

the

LOW

speed

trimmer

resistor.

FREQUENCY

COUNTER

wow

&

FLUTTER

METER

DECK

under

TEST

T4083

Fig.

2-9

Motor

Servo

P.C.B.

Fig.

2-10

2-9

WOW

AND

FLUTTER

(See

Fig.

2-9)

PLAYBACK

1.

Connect

a

wow-and-flutter

meter

to

the

deck

as

shown

in

Fig.

2.

2-9.

Load

a

TEAC

YTT-2003

test

tape

to

check

the

wow

and

flutter

when

the

deck

is

set

to

HIGH

speed,

or

a

YTT-2002

test

tape

to

check

when

set

to

LOW

speed.

.

Play

the

beginning

and

end

of

the

respective

test

tape

for

each

speed

setting.

The

measured

wow

and

flutter

should

be

at

least

0.06%

(WRMS)

and

0.12%

(RMS)

for

the

HIGH

speed

setting

and

at

least

0.10%

(WRMS)

and

0.15%

(RMS)

for

the

LOW

speed

setting.

OVERALL

4.

Load

a

TEAC

YTT-8013

test

tape

and

record

a

3000-Hz

signal

On

it

in

both

HIGH

and

LOW

speed

settings

and

at

the

beginning

and

end

of

the

tape,

and

while

recording

the

signal,

simultaneous-

ly

monitor

the

signal

from

the

play

head

by

setting

the

MONI-

TOR

switch

to

the

TAPE

position

(raised

position).

.

The

wow-and-flutter

meter

should

indicate

a

reading

of

no

more

than

0.08%

(WRMS)

in

the

HIGH

speed

setting

and

no

more

than

0.15%

(WRMS)

in

the

LOW

speed

setting.

2-10

HEAD

AND

TAPE

PATH

ALIGNMENT

2-10-1

HEAD

CONFIGURATION

Playback

Record

@

Azimuth

©

Height

and

tilt

@

=

Tangency

Fig.

2-11

2-10-2,

ALIGNMENT

CONDITIONS

Adjust

each

head

to

satisfy

each

of

the

following

conditions:

Example

of

|

Pondition

Mis-alignment

TILT

The

head

surface

should

be

parallel

to

the

tape

guide

f

pin

surface.

}

|

AZIMUTH

The

gap

of

the

head

core

should

be

perpendicular

to

the

tape

path.

HEIGHT

The

upper

edge

of

the

upper

core

of

the

head

should

be

level

with

the

upper

edge

of

the

tape.

TANGENCY

The

dotted

line

should

be

perpendicular

to

the

sur-

|

face

of

the

tape.

Fig.

2-12

Head

regulation

elements

2-10-3

ALIGNMENT

PROCEDURE

1.

By

visual

observation,

align

the

erase,

record,

and

playback

heads

so

that

the

proper

tilt

is

obtained

for

each.

2.

Coarse-adjust

the

azimuth

of

the

erase,

record,

and

playback

heads

by

observing

each

without

a

tape

threaded.

.

Load

a

TEAC

YTT-8013

test

tape

and

play

it.

4.

The

erase

head

core

should

protrude

0.1

mm

above

the

tape

while

in

motion.

If

not,

readjust

the

azimuth

and

recheck

the

tilt

and

height.

Adjust

as

necessary.

5.

Fine-adjust

the

height

of

the

record

and

playback

heads

until

the

brass-colored

spacers

appear

above

the

moving

tape.

(The

brass-

colored

spacers

appear

about

as

thin

as

a

pencil

line.)

When

ad-

justing,

make

sure

all

the

screws

are

turned

proportionately

so

that

the

tilt

and

azimuth

previously

adjusted

is

not

altered.

6.

If

required,

make

a

coarse

adjustment

of

any

head

requiring

tangency

correction,

while

the

tape

is

running.

ow

X3

2-11

FREQUENCY

AND

VOLTAGE

CONVERSION

General

Export

Models

Only:

If

it

is

necessary

to

change

the

frequency

and

line

voltage

settings,

follow

the instructions

below:

ALWAYS

DISCONNECT

THE

POWER

LINE

CORD

BEFORE

MAKING

THESE

ADJUSTMENTS.

1.

Remove

the

metal

housing

covering

the

top

and

sides

of

the

deck

by

unscrewing

the

three

screws

from

each

side.

2.

Locate

the

voltage

selector

on

the

right

(as

seen

from

the

front).

The

frequency

selectors

are

jocated

near

each

motoras

illustrated.

Voltage

Conversion:

3.

Turn

the

slotted

center

post

of

the

selector

with

a

screwdriver

or

coin

as

illustrated

until

the

proper

setting

is

obtained.

Frequency

Conversion:

4.

For

each

reel

motor,

loosen

the

screws

on

the

respective

fre-

quency

selector

bar

and

jumper

the

bar

to

the

terminal

corre-

sponding

to

the

AC

line

frequency

of

your

area,

then

retighten

the

screws.

5.

Replace

the

housing

and

retighten

the

screws.

*

Decks

in

some

areas

have

a

wooden

case

which

can

be

removed

by

unscrewing

the

screws

on

the

bottom

(feet)

and

sides,

Fig.

2-13

2-12

LUBRICATION

Oiling

is

needed

after

every

1,000

hours

of

operatiw

or

once

a

year

if

the

deck

is

used

infrequently.

TEAC

spindle

oil(

from

TEAC

TZ-255

oil

kit),

Mobil

D.T.E.

Oil

Light,

and

similar

ty>es

of

oil

are

recommended.

Lubrication

is

normally

not

necessary

o<cept

at

the

points

shown.

1.

Place

the

deck

in

a

horizontal

position.

2.

Apply

a

few

drops

of

oil

to

the

respective

spindles

siown,

except

the

capstan

and

the

reel

motors.

Spread

the

oil

evenly

on

the

spindle

surfaces

using

a

cotton

cloth

or

similar

appliaator.

.

For

the

capstan

and

reel

motors,

apply

a

few

drop

to

the

indi-

cated

positions

but

do

not

spread

the

oil.

.

After

oiling

all

points,

operate

the

deck

for

1

to

2

hrs

until

the

oil

is

thoroughly

absorbed.

wo

:—

e-OiL

Fig.

2-14

NOTES:

1.

3

ELECTRICAL

ADJUSTMENTS

AND

CHECKS

Clean

and

demagnetize

the

entire

tape

path

prior

to

making

any

adjustments

or

checks.

in

your

area.

Make

sure

that

the

deck

is

properly

set

for

the

voltage

3-1

POWER

SUPPLY

CHECK

1.

Connect

a

DC

voltmeter

to

pin

15

of

U101

on

the

Record/Play

back

PCB.

2.

The

DC

voltage

should

be

+12

V.

(See

Fig.

3-1)

Adjustments

and

checks

are

generally

done

in

order

of

L-ch,

then

R-ch.

Double

reference

numbers

indicate

L-

ch/R-ch.

(Example:

R121/R221)

The

value

of

“dB”

refers

to

0

dB

(0.775

V).

If

an

AC

voltmeter

calibrated

to

0

dB

(1

V)

is

used,

compensa-

tion

should

be

made

accordingly.

ohms

or

more

must

be

used.

.

An

AC

voltmeter

with

an

input

impedance

of

1

M

Record/playbac!

k

PCB

DC

VOLTMETER

3-2

MONITOR

PERFORMANCE

(1)

MODE/

SIGNAL

ADJUST

REMARKS

+

SENNEGTION

INSTRUCTION

SOURCE

(or

CHECK)

OUTPUT

MONITOR

sw.:

SOURCE

400

Hz/—22

dB

|

R121/R221

+1

dB

(869

mV)|

LINE

min.

input

level

Fae

Fase

jeu

cont.:MAX|

(61.5mV)

|

meee

isMONITOR|

71

SASS

Sn

a

se

a

ee

a

eee

pace

2

Ms

ane

en

eo:

OUTPUT

cont.

level

If

channels

do

IMPORTANT:

After

not

match

re-

setting,

Jo

not

change

adjust

R121

or

the

OUTPUT

contro},

1-2

%

dd

R220

to

corres-

|

—5

9B

(436

mV)

always

haave

if

in

this

pond

to

the

position,

higher

OUTPUT.

MONITOR

sw.:

2.

VU

meter

|

2-4|Fig.

3-2

SOURCE

Ter

eg

on

|

Rlaginzi7

(1

OV

een

NG

LINE

cont.:

MAx

|

(61-5

mV)

Meter

nee

I

asl

OSCILLATOR

pisTORTION

ANALYZER

OSCILLOSCOPE

acinar)

@

oe

ATTENUATOR

LINE

iN

R

F

IkHz

FILTER

$2

Fig.

3-2

Basic

connection

AC

Voltmeter

T1772

OSCILLATOR

OSCILLOSCOPE

Fig.

3-3

Connection

3-3

PLAYBACK

PERFORMANCE

X3

TEAC

test

tape:

YTT-1002:

For

playback

alignment

(9.5

cm/s

or

3-3/4

ips)

YTT-1003:

For

playback

alignment

(19

cm/s

or

7-1/2

ips)

YTT-8013:

For

recording

alignment

(blank)

(400

Hz/0

dB)

MODE/

SIGNAL

ADJUST

TEM

connection

INSTRUCTION

SOURCE

(or

CHECK)

COE

REMARKS

.

Playback

|

MONITOR

AE

Azimuth.

adjust

|

Phase:

within

45°

head

3-1!

Fig.

3-3

Tare

Aa

ease

screws

on

head

on

oscilloscope

rene

2

SPEED

sw.:

(16

kH2/—10

dB)

eo

44

PN

P

azimu

HIGH

9.

g.

OUTPUT

cont.:

spec.

position

Y

a

Sc

BOY

PORES

|

aql

pig

Geo

SPEED

sw.:

Tee1903

R105/R205

—5

dB

(436

mv)

level

(400

Hz/0

dB)

HIGH

Playback

mode

.

VU

meter

As

Check

0

VU

+0.5

VU

.

Frequency

response

.

Signal-to-

noise

ratio

Fig.

3-2

MONITOR

sw.:

TAPE

SPEED

sw.:

HIGH

o

SPEED

sw.:

LOW

Playback

mode

Use

fully

erased

tape

(use

bulk

tape

eraser)

3-4

MONITOR

PERFORMANCE

(2)

YTT-1003

YTT-1002

YTT-8013

R111/R211

R113/R213

Check

40

Hz~20

kHz

+3

dB

40

Hz~14

kHz

+3

dB

HIGH:

49

dB

Ratio

of

specified

(min)

ratio

OUTPUT

signal

LOW:

47

dB

(—5

dB)

toinherent

(min)

ratio

noise

level.

8.

MIC

Fig.

3-2

PINE

Gone:

—5

dB

+3

dB

MIN

400

Hz/—70

dB

Input

8-41

but

LINE

IN

MIC

cont.:

(245

nV)

Check

(308

mV

to

level

|

>

MIC

conte:

#

615

mv)

MAX

LINE

cont.:

—

a

a,

output

9-1]

Fig.

3-5

MIC

cont.:

400

Hz/—22

dB

|

Check

ig

Vice

8

toad

level

MIN

(61.5

mv)

Pan

eeare

MONITOR

sw.:

|

SOURCE

O°

(IN

PHASE)

oy,

45°

90°

180°

T-1493

Fig.

3-4

Confirming

phase

relationship

DECK

under

TEST

AC

Voltmeter

TEST

LOAD

alee

Fig.

3-5

Connection

X-3

3-5

RECORDING

PERFORMANCE

TEAC

test

tape:

YTT-8013:

For

recording

alignment

(blank)

—_—

MODE/

SIGNAL

ADJUST

(TEM

CONNECTION

sMerRbiGT

ION

SSURcE

lor

CHECK)

OUTPUT

REMARKS

AC

voltmeter

between

BIAS

Min.

reading

Bias

Frequency:

songs

10-1)

FRAP

TP(31-B

or|

Pec-Pause

mode.

_—

Eros

i208

on

VTVM

100

kHz

+5

kHz

irises

33-B)

&

GND

level

[ce

cree

reer,

eed

soeadciete

A

einen

hota

lllctiaccane

cee!

|

Rec-pause

mode.

10-2!

Fig.

3-2

MONITOR

sw.:

_

L101/L201

Min.

reading

TAPE

;

:

withi

11.

Record

MONITOR

sw.

10

kHz/—42

dB

|

Azimuth

adjust

PHASE

wit

in

head

11-1|

Fig.

3-3

TAPE

v)

x

salve

ot

Liéad

45°

on

oscillo-

Fig.

34

azimuth

Record

mode

(6.15m

scope

T

Test

Tape:

YTT-8013

SPEED

sw.:

LOW

12.

Record

:

BIAS

sw.:

1

7

kHz/—22

dB

Overbias

value

Bias

MeN

aoe

EQsw.:

1

(61.5

mV)

ice

3

dB~4

dB

MONITOR

sw.:

(from

peak)

TAPE

f

7

i}

|

if

Test

tape:

1

“|

YTT-8013

SPEED

sw.:

LOW

:

13.

Record

13-1

BIAS

sw.:

1

400

Hz/—22

dB

R154/R254

_5

dB

(436

mV)

Spec.

Record

condi-

level

(61.5

mV)

tion

EQ

sw.:

1

MONITOR

sw.:

TAPE

SPEED

sw.:

40

Hz~10

kHz

14,

Frequency|14-1|/'9:

3-2

did

eet

Oates

=3d8

Refererce

400

Hz

responce

Spec.

REC

con-

.

10

kHz~14

kHz

Ta

cee

Nee

aE

OE

ee

RO

ee

dL

ioe

2

ee

a

en

ee

sw.

1)

SPEED

sw.:

40

Hz~20

kHz/

+3

dB

14-2

7

HIGH

—32

dB

Check

a

Reference

400

Hz

.

(19.5

mv)

16

kHz~20

kHz

L

G

+3

dB,

-5

dB

15.F

7

-

-

+0.

i

5.

Frequency

Spec

REC

con

400

Hz/—32

dB

1

dB

+0.5dB/

|When

BIAS/EQ

switches

responce

15-1|Fig.

3-2

dition

.

Check

400

Hz.

are

changed

from

“1”

(BIAS,

EQ

2

SPEED

sw:

10

kHz/—32

dB

.

—3dB

+0.5dB/

|

to

“2thee

OUTPUT

SW.2)

HIGH

(19.5

mV)

10

kHz

level

shou

fd

be

reduced.

4.

+

—

BIAS

sw.:

1

HIGH:

47

dB

16.

Signai-to-

Seon

imine

Ratio

¢

specified

OUT-

noise

earaeee

pe

PUT

sinal

(—5

dB)

;

16-1}Fig.

3-2

HIGH

&

LOW

=

Check

LOW:

45

dB

dbatage

es

ratio

‘

to

inheen

t

noise

level.

Spec.

REC

(min.}

condition

ratio

r

Fig.

3-2

SPEED

sw.:

Lei

tae

OUTPUT:

—65

08

5

eterene

OUTPUT

level

17.

Erase

:

(195mv,

or

more

efficiency

17-1|switch

on

the

HIGH

+10

VU)

Check

(436

nV

or

less)

+5

dB.The

worst

value

Z

:

ithi

1

kHz

filter

RECORD

mode

thien:ne

éigddl

(70

dB

[min.]

shouldbe

within

spec.

recording

ratio)

OUTPUT:

—65dB

18.

REC

Fig.

3-2

niera

ae

C

See

aia

or

more

Referee

OUTPUT

level:

MUTE

18-1

‘switch

on

the

Spec.

REC

10

VU)

then

Check

(775

pV

or

less)

|+5

dB.The

worst

value

function

1

kHz

filter

P

oa

oe

(65

dB

[min.]

shouldje

«within

spec.

condition

record

muting

ratio)

ee

1

10