Caple Ri551 Manuel de service Page 89

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HP
16515N16A - Service
6-9. EXTENDER BOARD INSTALLATION
The
effects
of
ELECTROSTATIC
DISCHARGE
can
damage
electronic com-
ponents.
Use
grounded wriststraps and
mats
when
performing
any
kind of ser-
vice
to
this
instrument or
the
cards
in
it.
Installation Considerations:
Any
empty slot
may
be
used
in
the
card
slot.
When
the
HP
16516A
Expansion
Card
is
placed
on
the extender
board,
the
HP
16515A
Master
must
be
installed directly below extender
board.
Cards
or filler
panels
below the slot(s) intended for extender board installation do not hava to
be
removed.
Procedure:
1.
Turn
instrument power switch
off,
unplug power cord
and
disconnect any input connections.
2.
Starting from the top, loosen thumb
screws
on
filler
panel(s)
and
card(s).
4
Note
Two
card 1
GHz
Timing
Modules
are
screwed
together.
To
prevent binding
when
loosening or tightening
thumbscrews,
use
sequence
shown
in
figure 6-23.
D
L..------II
L..-I
_--JI
L...-
1
_--JI
L..-I
_--J
D
~---JI
~I
_--J
1
L..-
1
__
--J1
1
~
_
__J
Figure
6-23. Tightening
Or
Loosening
Sequence
3
2
6-35
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