280B Series

Scully 280B Series User Manual

Scully 280B Series

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Model

280B

Preventive

Maintenance

SECTION 4

PREVENTIVE

MAINTENANCE

4.1

GENERAL

Preventive

maintenance

of

the

electronics

assembly

consists

of

cleaning

and

visual

inspection

of

com-

ponents

and

wiring.

Remove

the

covers

at

frequent

intervals

and

remove

any

accumulations

of

dirt,

dust,

and

foreign

objects.

Inspect

for

loose

connec-

tors,

broken

contacts,

frayed

or

broken

wiring,

overheated

components,

or

other

visible signs

of

trouble.

Check

that

printed

wiring assemblies

are

firmly

seated

in

their

connectors.

4.2

CLEANING

Clean all

components

in

the

tape

path

after

each

reel change.

A.

Remove

all

tape

from

the

tape

path.

B. Moisten a

"Q"

tip

applicator

with

isopropyl

alcohol.

Squeeze

excess

solvent

from

the

tip

between

two

layers

of

clean

cloth.

C.

Scrub

all

components

in

the

tape

path,

with

exception

of

the

pressure

roller,

commenc-

ing

with

the

heads,

using

moderate

pressure

un

til all

oxide

particles

are

removed.

Do

not

use

too

much

head

cleaner,

and

never

use a

metallic

instrument

as a

cleaning

tool.

Excess

solvent

dripping

into

critical

parts

or

minor

scratches

on

components

in

the

tape

path

may

seriously

degrade

the

performance

of

the

equipment.

Do

not

use a

blower

of

any

type

be-

cause

dirt

and

dust

particles

may

be

forced

into

rotating

parts.

D.

Use a

rubber

band

to

hold

the

tape

break

arm

and

manually

move

the

reels.

Moisten

a

"Q"

tip

with

isopropyl

alcohol

and

squeeze

out

excess

fluid.

Contact

the

pressure

roller

with

the

"Q"

tip

and

sweep

the

tip

up

and

down

the

surface

un

til all

oxide

is

removed

from

the

pressure

roller.

Change

the

applicator

as

soon

as

it

becomes

fouled.

E.

Check

all

parts

in

the

tape

path

for

loose

cot-

ton

fibers

and

unevaporated

solvent.

Remove

and

dry

as

necessary.

F.

Inspect

all

components

at

the

back

of

the

transport

once

a

month.

Remove

any

accumu-

lation

of

dirt

or

dust

with

a

soft

brush

or

vac-

uum

cleaner.

4.3

LUBRICATION

No

lubrication

is

required

in

the

transport

under

regular

maintanance

conditions.

4.4

DEMAGNETIZING

The

entire

process

of

professional

tape

recording

and

reproducing

relies

on

the

use

of

alternating

magnetic

fields,

but

permanent

dc

fields are

detri-

mental

in

many

ways

to

high

performance

equip-

ment.

Such

permanent

magnetic

fields

cause

am-

plitude

and

frequency

distortion,

as well as

higher

noise

level

and

gradual

degradation

of

recorded

information.

Therefore,

good

practice

requires

that

the

heads

be

demagnetized

every

month,

or

sooner

if

symptoms

appear

to

indicate

the

need.

Any

standard

demagnetizer

with

padded

tips

can

be

used,

but

extreme

care

should

be

given

to

actual

technique:

4-1

Table of Contents

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Scully 280B Series Specifications

General

Brand	Scully
Model	280B Series
Category	Turntable
Language	English