Scully 280B Series - Page 193

Scully 280B Series

241 pages

Save Page as PDF

To Next Page

To Next Page

To Previous Page

To Previous Page

Loading...

Model

285B

Electronics

Maintenance

SECTION 6

ELECTRONICS MAINTENANCE

6.1

PREVENTIVE

MAINTENANCE

6.2

Preventive

maintenance

of

the

electronics

consists

of

cleaning

and

visual

inspection

of

components

and

wiring.

At

frequent

intervals,

remove

any

accumulations

of

dirt,

dust,

and

foreign

objects.

Inspect

for

loose

connectors,

broken

contacts,

frayed

or

broken

wiring,

over-

heated

components,

or

other

visible

signs

of

trouble.

Check

that

printed

wiring

assemblies

are

firmly

seated

in

their

connectors.

6.3

CHECKOUT

AND

ALIGNMENT

PROCEDURES

6.4

The

following

checkout

and

alignment

procedures

should

be

performed

at

the

time

of

installation

and

at

other

times

deemed

desirable

by

the

user.

In

stereo

machines,

these

procedures

must

be

repeated

for

each

channel.

The

degaussing

and

head

alignment

proce-

dures

described

in

Section

5

of

the

280B

manual

should

be

performed

prior

to

any

checkout

and

alignment.

6.5

Test

Equipment

Required

6.6

The

following

test

equipment,

or

equivalent,

is

required

to

perform

the

checkout

and

alignment

procedures

and

for

troubleshooting

the

machine:

Recording

tape

Distortion

Analyzer

(capable

of

reading

Third

Harmonic

Distortion)

AC

Voltmeter,

Hewlett-Packard

Model

400F

Flutter

Meter,

BHK

Electronics

Model

F2

Oscilloscope,

Tektronix

Model

502

Head

Demagnetizer

Volt-Ohm-Milliammeter,

Simpson

Model

260

6-1

Table of Contents