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4
Models 423A/8470A
CONTACT
ASSEMBLY
TYPE
N
MALE
NUT
cAPsuuE
l(
SPACER
clpacrttvE
*
WASHER
xTHESE
lrExs
REPLACED
TGETHER
REFER TO
TABLE no.2
FOR
REPLACETENT
ASSETBLY
90ck
NUlBEis.
TYPE
N
NIJT
RETAINING
RING
Figure
3.
Model
423.4'
Assembly
t/
t2'
Figure
4.
Cutting
Center Conductor Lead
to
Accommodate Contact Spring
RESISTOR
CONTACT SPRING
Figure
5.
Model
11523A Load
Resistor,
Cutaway View
d.
Replace
connector cap
and TIGHTEN FIRMLY.
Note
The Option 02 Detector Element
Assembly
includes
a
detector element and a resistor.
The
resistor
is
for
use
in
the
Model
11523A
and
must be installed
to match it
to
the
Detector.
2?.
REPLACING OUTPUT BNC
CONNECTOR.
28.
TOOLS
REQUIRED.
a.
Needle-point solderiag iron
b.
Wire cutters
d.
Flat
file,
#4
d.
Tweezers
29.
PROCEDURE.
Parts
mentioned in
the
following
procedure are
identiJied
in
Figures
3 and
4.
a.
Remove BNC connector
and
lockwasher.
b.
Unsolder contact spring
soldered
to center
con-
ductor
lead.
(
1) Cut cente
r conductor lead
to approximately
L
/
32
inch
(see
Figure
4).
(2)
With
flat file,
smooth end
of lead;
wipe
off burr
with tweezers
or similar
metal instrument.
WASHER c.
Slip contact spring over center
conductor
lead,
and
solder.
BNC
CAUTION
Use
solder sparinglyor
it will
creep back
on
spring.
Solder on
springdestroys
its
useful-
ness, and solder is difficult to
remove
from
spring.
d.
Let
spring
cool,
and
then replace lockwasher
and
connector
in
connector
cap.
30.
REPLACEMENT OF
11523A PARTS.
31. Parts
mentioned
in
the following procedure
are
identifiedin Figures4
and
5. Toolsrequiredare
listed
in Paragraph
28.
32.
REPLACINGMALE
BNC CONNECTOR.
a.
Remove
male BNC corurector
and
lock
washer
from housing. To remove BNC,
use a
3/8-inch
open-
end
wrench
and
hold
the
housing
either
in
a vise
or
with
gas
pliers.
Before
putting
pliers on,
protect
the
housing
of
the
11523A
with material
such as
heavy
paper.
b.
Unsolder resistor.
c.
Solder
resistor to
new
BNC.
d.
Let resistor
cool
and
then check resistance
from
male
BNC
pin
through
resistor;
resistance
measured
should
b
+l}Vo
that
indicated by
the
coding.
e.
Replace lockwasher
and
male
BNC.
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,f
(fr
rl-4.,
w)
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v
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I
f
t,-
01613
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