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e.
Remove
the
nine
screws
which hold
the
sample
string
assembly
in
place
on
the
rear
of
the
first
bulkhead.
The
reference
board assembly
is
held
in place
on
the front of the
second bulkhead
by
six
screws.
f.
Separate
the front panel
from
the
first
bulkhead
by
removing
the
RANGE,
FUNCTION,
CURRENT
LIMIT, and
voltage control
knobs and
unsoldering
the wires
which
connect
to the
output
terminals.
4-1 2.
To
gain access to
rear-panel-mounted
components,
proceed
as follows:
a.
Remove
the
top
and bottom
covers.
b.
Remove
the
narrow
covers located
immediately above
and below
the
rear
panel.
341A
343A
c.
Remove
the eight screws
which
hold
the rear panel
to the side
rails.
d.
Remove
the
four
transformer
screws,
which
are
located
on
the
rear panel.
e.
Remove
the
two
screws
which
hold
the
rear
panel
to
the center
bulkhead.
f.
Separate the
rear
panel
from
the
main
unit to the
extent permitted
by
the wiring.
4-13.
ADJUSTMENT
LOCATIONS
4-14.
All
controls required for
calibration
and
trouble-
shooting
are accessible
from
the top
of
the instrument
after
removing
the
top
cover.
See Figure 4-2
for
Model
341
adjustment
locations
and
Figure 4-3
for
Model
343A
ad-
justment
locations.
Figure
4-2.
MODEL
341A
ADJUSTMENT LOCATIONS
4-3
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