HP 8753D Option 011

A26
High Stability
Frequency Reference
(Option
1D5)
T
ools Required
T-10
TORX
screwdriv
er
T-15
TORX screwdriv
er
9/16-inc
h
hex-n
ut
driv
er
ESD
(electrostatic
discharge)
grounding wrist
strap
Remo
v
al
1.
Remo
v
e
the
rear
panel
(refer
to
\Rear
P
anel
Assem
bly"
in this
chapter).
2.
Disconnect
W30
from
the
high stabilit
y frequency
reference b
oard
(A26).
3.
Remo
v
ethe
BNC
connector
n
ut
and
w
asher
from
the
\10
MHz
PRECISION
REFERENCE"
connector
(item
1)
on
the
rear
panel.
4.
Remov
ethe
screw
(item
2)
that
secures
the
high
stabilit
y
frequency
reference
b
oard
(A26)
to
the
brac
k
et.
5.
Slide
the
b
oard
out
of
the
brac
k
et.
Be
careful
not
to
lose the
plastic spacer
w
asher
(item
3)
that
is
on
the
BNC
connector
as
the
b
oard
is
b
eing
remo
v
ed.
Replacement
Rev
erse
the
order
of
the
remo
v
al
pro
cedure.
Note
Before
reinserting
the
high
stabilit
y
frequency
reference
b
oard
(A26)
in
to the
brac
k
et,
b
e
sure
the
plastic
spacer
w
asher
(item
3)
is
on
the
BNC
connector.
14-48 Assembly Replacement and
Post-Repair Procedures
DRAFT
3/21/106 15:15
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