User`s guide

Clarity Visual Systems
November 1998
18
display (#3) and align it to the center display,
following the steps 4.C. through 4.F.
5. Align the adapter plates on the
rest of the rows, working
upward.
Start with a display at the end of the row. Align
display #4 to display #3. Put the Alignment Tool on
the outside edge of #3. One of the upper guide pins
should now fit the Alignment Hole in #4. Loosen the
bottom Locking Screw in #4 and make it fit.
Move the Alignment Tool between #1 and #3 so it
reaches up and covers part of the seam between #4
and #5. Align this side of #4 and tighten the Locking
Screw at the bottom.
Measure the diagonals of #4. Loosen the top two
Locking Screws and make its corners square, then
tighten the screws.
Continue with display #5, working your way across the
video wall. (If you have two Alignment Tools, put
one on each side, and the work will go faster.)
When the second row is complete, move up a row.
6. Hang the screens on the
bottom row and adjust them in
or out so the front surfaces
(the glass) are flat with each
other.
Hang all the screens on the bottom row. Be sure the
finger holes are on the top of each screen. When
each screen is seated, pull on it slightly to make
sure it is secure.
Notice the seams. Are the two screens flush at each
seam? If not, note how much you will have to adjust
one of the screens to make it flat and flush with its
neighbor. Measure this amount, but be careful not
to scratch the screens. It is a good idea to make a
diagram of the video wall. Make notes about how
far to move each corner in or out. Then remove all
the screens again.
Working from your notes, adjust the pointed Alignment
Bolts with the ½-inch wrench. Looking at the display
from the front, each complete turn of the bolt CW
(clockwise) pulls the corner of the screen IN (away
from you) by 1/32nd of an inch (0.8 mm).
Hang the screens on the bottom row again and check
your work. You can now secure the screens to the
Adapter Plates with the two screws you saved.
Some installers prefer to use these screws only on
the top row.
7. Hang the screens on the upper
rows, and make them flat.
When the bottom row is aligned, hang the screens on
the row above; adjust these to be flush with the
bottom row and with each other.
8. Put retaining screws in the top
row and cover holes and seams
with black tape to prevent light
leaks.
When all the screens are aligned with each other to
make a flat, square video wall, put the screws in the
top row of screens to hold them in place.
The finger holes and the space between the screen
and the Adapter Plate can be a source of light leaks,
allowing stray light to hit the back of the screen and
wash out some of the picture. To prevent this, cover
the finger holes in the top row of displays with black
cloth tape. Gaffer tape does a nice job of this.
Masking tape is sometimes difficult to remove
cleanly. You can check for light leaks during the
video setu
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rocess. Select “Curtain” from the main