Akai X-360 Service Manual

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V.

MAGNETIC

HEADS

ADJUSTMENT

1.

Adjustment

of

Magnetic

Heads

Adjust

serews

so

that

the

upper

edge

of

the

upper

core

is

the

same

height

as

the

upper

edge

of

the

tape.

Since

adjustment

of

the

Heads

critically

affects

tape

recorder

performance,

it

is

essential

that

Heads

be

carefully

adjusted

with

precision

measuring

equipment

and

a

suitable

recorded

tape.

1.1

Adjustment

of

Head

Height

(See

Figures

1

and

2)

Whenever

replacing

the

Head

Assembly,

adjust

the

Tape

Guides

(J)

and

(K)

so

that

they

do

not

contact

the

edge

of

the

tape,

then

proceed

with

Head

height

adjustment.

1)

Playback

Head

2)

3)

To

adjust,

turn

Screw

(a)

(Figure

1)

during

“Normal

Play”

position

so

that

the

upper

edge:

of

the

upper

core

of

the

Playback

Head

is

the

same

height

as

the

upper

edge

of

the

tape.

Adjust

by

turning

Screw

(b)

(Figure

1)

during

“Reverse

Play”

position

so

that

the

lower

edge

of

the

lower

core

of

the

Playback

Head

is

the

same

height

as

the

lower

edge

of

the

tape.

Recording

Head

Adjust

with

Screws

(d),

(e)

and

(f)

(Figure

1)

so

that

the

upper

edge

of

the

upper

core

is

the

same

height

as

the

upper

edge

of

the

tape.

Erasing

Head

Adjust

Screws

(g),

(h)

and

(i)

(Figure

1)

so

that

the

upper

edge

of

the

upper

core

is

0.125

to

0.15

mm

higher

than

the

upper

edge

of

the

tape.

(Precaution)

In

adjusting

Head

Height,

make

sure

that

the

front

of

the

Head

is

at

right

angles

to

the.

Chassis

and

that

the

upper

and

lower

part

of

the

Head

firmly

contact

the

tape.

1.2

Adjustment

of

Azimuth

Alignment

1)

2)

3)

4)

Playback

Head

Use

a

Pre-recorded

tape

(16

KHz,

7-1/2

ips),

and

connect

a

highly

sensitivity

V.T.V.M.

to

the

line

output

jack.

Adjust

Screw

(C)

(Figure

1)

so

that

line

output

voltage

is

maximum.

Recording

Head

Connect

an

Audio

Oscillator

to

the

line

input

jack

and

record

16

KHz

Signals

at

a

—10db

recording

level

and

depress

the

Monitor

“TAPE”

Button.

Adjust

Screw

(f)

(Figure

1)

so

that

the

indicated

V.T.V.M.

value

applied

to

the

line

output

jack

is

maximum.

Erasing

Head

Visually

check

to

assure

that

the

centerline

of

the

Erasing

Head,

is

at

right

angles

to

the

Head

Chassis.

Bias

Head

Loosen

Screws

(m)

and

(n)

(Figure

1),

adjust

angulation

and

clearance

of

the

Bias

and

Recording

Heads,

as

subsequently

described

in

paragraph

2-5

(Adjustment

of

Recording

Equalization

(Balance)

Characteristics).

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Akai X-360 Specifications

General

Brand	Akai
Model	X-360
Category	Measuring Instruments
Language	English

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