Model
182C
Adjustments
5-16.
ADJUSTMENT PROCEDURE.
5-17.
The
following paragraphs outline the procedure for
accomplishing
the
adjustments required for the Model
182C. Use the equipment recoiiiiiierided in Table
8-1
oi
simitar equipment having at
least
equivalent capability.
Use
only
o non
metallic odjustment tool.
h18. The adjustment procedures
should
be
performed
In the sequence listed, since some adjustments
are
depend-
ent on control settings and results of previous steps. The
adjustments may be accomplished individually, if desired,
by
referring
to the preliminary
control
settings ar>d
the
steps before the desired procedure.
5-
19. COVER REMOVAL.
6-
20. To
gain access to the adjustments, top and bottom
covers and the rear
LVPS
access
panel
must be
removed.
See Figure
5-1.
Remove the covers as
follows:
a.
Ensure that LINE power switch is OFF and discon-
nect power plug
from
ac power
source.
b. Set oscilloscope on rear end.
c.
Release
3
quortcr turn
fasteners
on each side of the
instrument. Cover retainers will
be completely
free.
d. Loosen 2 captive screws located on handle ends.
e. Remove top cover
by expanding open end slightly
and pulling away from
instrument.
f.
Remove bottom cover
by
extending
tilt stand,
expanding open
end
of
covet and pulling away fiuin
instrument.
g.
Return instrument
to horizontal position and remove
rear
access
cover
by releasing single quarter-turn
fastener.
5-21. PRELIMINARY SETUP.
5-22. Install vertical
and
time
base
plug-ins in Model
182C. Set
line voltage
SELECTOR switch,
located
on
rear panel, to desired power line operating voltage
115V or
230V ac. Connect instrument to line power
source and apply power by turning LINfc power
switch
ON. Allow fifteen minutes
for
warm up. Check that
Phase/6andwidih switch is In Bandwidth position.
5-23.
Adjustment
locations
are
identified
in the photo-
graphs
at the end of this section. The page may
be
folded
out
for
easy
reference
while performing the adjustments,
5-24. There
are several adjustments which directly affect
the final accuracy of
the horizontal sweep. These must be
made accurately and to the test limits specified to ensure
that sweep accuracy will
be maintained as time base plug-
ins are interchanged.
The adjustments given for the Low
Voltage Power Supply,
High Voltage Power Supply, and
Horizontal Amplifier,
are
particularly important
in this
respect.
LOOSEN 2
CAPTIVE SCREWS
EXTEND TILT SIDE
Figure
5-1.
Cover Removal
5-3
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