12084-101 Rev. D Page 9
NOTE: To obtain longer refracting distances in small
rooms, a mirror system can be used. A high
Figure 5 as an example of an arrangement
for a short room with full 20 foot refracting
distance.
SLIDE SELECTION
The cross slide (3) contains three apertures which
index into position in front of any frame of characters
is centrally located on the slide. In this position,
screen.
By moving the slide to the left or right of the central
position, either the vertical line aperture or the red
To attach the cross slide, unscrew one of the knobs
-
tor. When inserting the cross slide, be certain that the
instrument and that the index notches face upward.
The cross slide, as well as the horizontal line selector
(2), may be operated from either the left or the right
side of the instrument. When the horizontal line se-
lector is used with the vertical aperture of the selector
BULB LIFE
The LongLife P-O-C uses the 11143 Halogen Bulb
(20) to produce a superb combination of brightness
and long bulb life.
You can maximize the bulb’s useful life by following
these guidelines:
hour.
3. Regardless of the bulb’s expected life, it is good
practice to always have a spare bulb available.
FILAMENT ALIGNMENT
you want to align or check the alignment of the bulb’s
2. Remove the rear cover.
outlet.
their positions.
5. Loosen locking screws and slide both tubes into
unit as far as possible.
WARNING: DO NOT REMOVE BULB REFLEC-
TOR HOUSING (19). LAMP IS VERY
BRIGHT AND MAY POSSIBLY
EXPLODE.
centered and in best focus.
darkening in any corner of the screen. If darken-
to correct any darkening.
position and tighten lock screws.
INTERNAL FUSE
This instrument contains an internal fuse to assure
safe operation and continued high performance. If
you need to replace the fuse please follow these
procedures:
2. Unplug the power cord from the wall and the
instrument.
3. Remove the rear cover as described in the
section on Bulb Replacement (see page 8).
4. Locate fuse in lower portion of the electrical
assembly.
5. Remove the fuse cover and gently remove the
fuse from the holder.
6. Replace the fuse with a fuse of the same size
and rating. The size and rating is printed in a
triangular label underneath the fuse or on the
fuse itself.
CARE OF THE INSTRUMENT
housing is can be cleaned with any mild soap or
detergent. Occasionally wipe the slides and focusing
tube with a soft clean dry cloth.
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