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SECTION
502-543
-400
EXCLUSION
SWITCH
Fig
. 1-.2
563HBMS
Te lephone
Set
With
Polarity Guard Installed.
with base of
set, and gently
press housing m
place.
(c) Depress exclusion
plunger.
With
slight
pressure it
should
snap into
its unoperated
position.
(d) Operate
exclusion
plunger several times to
insure proper operation.
Tighten captive
screws
in base of
set.
·
D.
Exclusion Switch
2 .07
Per
form no fie ld maintenance
on
exclusion
switch
and plunger
other
than
cleaning
contacts
with
a 265C
tool.
Page 2
2.08
Replace
set
or exclusion switch
assembly
if
any of
the following exclusion switch
requirements
cannot
be
met.
(a) Exclusion
plunger
should remain in
the
operated position
when pulled up to
the full
extent of its
stroke.
(b)
The plunger
should
return to
the
fully
depressed
position
when
handset is replaced.
(c) With housing removed, normally closed
contacts
of the exclusion switch should
have
perceptible
follow
when
operated
manually.
(d) With housing removed,
open contacts
of
the
exclusion
switch
shou ld have minimum
separation of 1164-inch;
gauge
by eye.
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