Marconi Instruments TF 2502 - Page 16

Marconi Instruments TF 2502

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Maintenance

4.1

GENERAL

The

circuit

diagram

shows

all

the

electrical

components

contained

in

the

instru-

ment.

The

description

of

these

components

-

their

type,

value,

rating

etc.

-is

given

in Chap.

6,

and

the

layout

of

components

in

the

monitor

unit

is

shown

in

Fig,

4.

1.

Fig.

4.1

Rear

of

front

panel

Screw

fasteners

Screw

threads

used

on

this

instrument

are

of

the

following

sizes:

4BA,

6BA

and

8BA.

Cruciform

head

screws

are

of

the

Pozidriv

pattern;

to

avoid

damaging

them

a

Pozidriv

screwdriver

should

be

used.

2501

(lj

IS