Installation Conditions And Throw Distance - JVC DLA-G20 Sales Manual

Installation conditions
and throw distance
Offset axis
The offset axis is applied to the projection optical axis (50% fixed). Thus, when the
DLA-G20
projector is placed horizontally, projection is upward, meaning that the projector does not
interfere with the visibility of the picture even when viewed from behind the projector.
Installation conditions diagram
Upward off-axis is provided vertically, not horizontally.
• The off-axis is fixed (50%). Compensation for screen keystone distortion is not provided.
• The center axis of the lens is at the lower edge of the projection screen. This position remains unchanged even when zoomed.
• With inverted suspension from the ceiling, the center axis of the lens is at the upper edge of the projection screen.
Screen
When placed on a table
When hanging
from the ceiling
(inverted suspension
from the ceiling)
Screen
With a ceiling suspension installation, the projector can be
installed horizontally. Stability is assured by the upside-down
reverse function. (The optional EF-G10CJ ceiling suspension
stopper is recommended.)
Offset axis is not added to the projection optical axis. The center axis of the lens is at
DLA-S15
the center of the screen horizontally and vertically.
Installation conditions diagram
• The off-axis amount is fixed (0%). Compensation for screen keystone distortion is not provided.
Screen
Note: The lens position shifts horizontally by 72 mm from the center of the unit. Keep this in mind during installation
(DLA-G20/DLA-S15).
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Center of the lens
Lower edge
of the screen
Lower edge
of the screen
Screen
Center of the lens
Warning
● Special equipment is required to install the projector on the
ceiling. For safety, this type of installation should be performed by
a qualified technician, not by the customer.
● For installation, consult your dealer. JVC is not responsible for
any damages or injuries that may result from improper or faulty
installation.
Screen
Throw distance
The throw distance for a media projector is shown below.
DLA-G20
• The throw distance is from the end of the lens to the screen's lower edge.
DLA-S15
• The throw distance is from the end of the lens to the screen's lower edge.
Notes:
• Be careful when demonstrating because the DLA-S15's
lens section extrudes 41 mm further than the DLA-G20's.
• The lens has a small degree of error and, unlike the ILA
series, it is not provided with an electronic screen size
adjustment function. For optimum results with the
DLA-G20, do not use the maximum telescopic or wide
D-ILA Method Present Condition and Subject

Installation conditions and throw distance

Screen
Throw distance
Screen
Throw distance
angle values. If this is unavoidable, install the projector on
a movable mechanism so that you can move it slightly to
compensate for error. Similarly, because the DLA-S15 has
a fixed focus lens, a similar mechanism will be required to
allow adjustments to the throw distance.
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