HP 181A Operating And Service Manual page 6

Section II
Paragraphs 2-18 to 2-22
BOTTOM PANEL
iras
TILT STAND "d
FOOT-BUTTON
PLASTIC FOOT
TRIM STRIP
Model 181A/AR
TOOOHF -8—19
Figure 2-1. Bernch/Rack-Mount Conversion
'a. Detach tilt stand by pressing itaway from front
feet. Remove all plastic feet by depressing metal but-
ton and sliding feet free.
b. Remove aluminum trim stripfrom each side of
instrument with a thin blade tool.
c. Attach rack mounting flange in space from which
trim strip was removed {use screws provided with kit).
Large notch of flange should be positioned at bottom
of instrument.
2-17. INSTRUMENT COOLING.
2-18. The Model 181A/AR does not need forced-air
cooling when operated in an amibient temperature of
0 to +55 degrees centigrade. Normal air circula-
tion wil maintain a reasonable temperature within
the instrument.
2-19. CONTRAST FILTER AND BEZEL REMOVAL.
2-20. A contrast filter which also acts as an RFI
Shield is located behind the bezel. Use ofthe filter
is recommended since it provides for comfortable
viewingand RFI shielding. In specificcases, however,
such as when a camera is attached for use with the
oscilloscope, removal of the filter may be desirable.
To accomplish this, merely remove the bezel as shown
in Figure 2-2, slip the filter out, and replace the
bezel.
2-21. To remove the bezel, grasp it as shown in
Figure 2~2A, gently apply a downwardpressure with
the index fingers until the bezel's upper ear is free of
its slot, pull slightly forward and release. Next,
grasp the bezel as shown in Figure 2-2B, apply an
upward pressure with the thumbs until the bezel's
2-2
lower ear clears its slot, pull forward and remove
the bezel. Be certain to apply pressure on the inner
edge of the bezel to release the ears in both steps
since pressure on the outer edge tends to cause a
swivel action, defeating the purpose, and subjecting.
the ears to possible damage.
Figure 2-2, Bezel Removal
02612-3