Operating Precautions - JVC DLA-G20 Sales Manual

Installation
Replacing the light source lamp (DLA-G20/DLA-S15)
The light source lamp must be replaced periodically. As a rough
guideline, the lamp should be replaced after about 1000 hours of
operation.
When the lamp's operation time surpasses 900 hours, the
LAMP indicator on the projector lights. When projection starts,
the [lamp replacement] message is shown on the screen for
about 2 minutes. Use a new light source lamp or prepare a light
source lamp for replacement. When 1000 hours have passed,
Notes:
• If the projector is installed in a tight space where it is difficult to
work on, move it to a place where there is more space to work
to avoid injury.
• Use a genuine light source lamp. Problems may occur if you
do not use an approved lamp. Do not use a used light source
lamp. This will result in a reduction of performance and, if the
lamp is damaged, could cause the projector to malfunction.
• Do not replace the light source lamp immediately after using
the projector as the lamp will be too hot to touch. Wait at least
one hour for the lamp to cool.
1 Loosen the screw and remove the
lamp cover.
Loosen the two screws.
Lamp cover
Screw
Take care not to
damage the pawl.
3 Insert a new lamp unit to the inner
part and secure the screw.
Loosen the two screws.
Lamp unit
Screw
Handle
Note: Do not touch the glass surface of the light source lamp with
bare hands or allow it to get dirty. This can shorten the lamp life
and result in poor performance (pictures may appear darker).
Hold the plastic section of a new light source lamp. Do not touch
the metal section or front glass section.
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the LAMP indictor blinks and the light source lamp will not light
even if the [OPERATE] button (or [POWER] button on the remote
control unit) is pressed.
Although lamp replacement timing is normally about 1000
hours, it can vary depending on the operating conditions. If
projection images are dark and the colors are abnormal, replace
the light source lamp earlier. To purchase a light source lamp
(DLA-20-LAMP), consult your JVC dealer.
• When replacing the light source lamp, be sure to turn the main
power off and unplug the power cord from the AC outlet.
Otherwise, an injury or electric shock may result.
• Do not dispose of used lamps as is because doing so is very
dangerous. The lamp contains gas that is sealed in under very
high pressure. Before disposing of the lamp, be sure to remove
the gas.
For more information on disposing of a used lamp, refer to the
instructions provided with the lamp. If you have any questions,
consult your JVC dealer.
2 Loosen the screw on the lamp unit
and pull the handle to remove the lamp
unit.
Loosen the two screws.
Screw
Lamp unit
Handle
4 Install the lamp cover and secure the
screw.
Loosen the two screws.
Lamp cover
Take care not to damage the pawl.
Notes:
• Place the lamp unit in position and close the lamp cover correct-
ly. If the lamp is not properly installed or the cover is not closed
correctly, the safety switch comes on, preventing operation.
• If the pawl on the lamp cover is damaged, the projector may not
work. In this case, replace the lamp cover with a new one.
• When the lamp is replaced, be sure to reset the lamp usage
time. For resetting, refer to the instruction manual.

Operating precautions

The D-ILA projector is a precision instrument. Be sure to operate it carefully,
according to the points listed below.
1 The D-ILA multimedia projector
takes 40 to 50 seconds to display
images after the power is turned on.
The D-ILA multimedia projector takes 40 to 50 seconds to display
images after the power is turned on. This is not a malfunction.
Images will become clear soon after they start to appear.
Warming up is not necessary.
2 Do not disconnect power
immediately after turning off the D-ILA
multimedia projector.
The [OPERATE] indicator goes out when the projector is turned
off, but the cooling fan keeps running for about 40 seconds
(depending on environmental conditions). Therefore, do not turn
the main power off, pull out the plug, or turn off the circuit breaker
soon after finishing operation. Doing so could damage the lamp
in the projector.
Do not shut off the power during operation, as this could
also damage the lamp. JVC assumes no responsibility for any
damage caused by this action.
3 The D-ILA multimedia projector
takes a few seconds to change image
signals.
The D-ILA multimedia projector adapts to different kinds of
multimedia. When it switches to a different type of image signal,
the projector will take a few seconds to adapt to the new signal.
When the signal changes, the display will be disturbed a bit, but
this is not a malfunction.
4 Maintain the proper relationship
between the projector and the screen.
The relationship between the throw distance and the screen size
and the elevation angle are different for each type of D-ILA
multimedia projector. Check the proper position for your machine
before using.
D-ILA Method Present Condition and Subject
5 There is no function to correct
keystone distortion.
If the position is not correct as described in <4>, keystone
distortion will occur. The D-ILA multimedia projector does not have
an automatic function to correct this distortion. Adjust the projec-
tor's position relative to the screen to correct the image.
When the projector is When the projector is When the projector is
positioned upward positioned to the left incorrectly positioned
(downward) (right) in both directions
6 Perform maintenance in the
proper amount of space.
The projector needs a certain amount of space for proper
adjustment and maintenance (at minimum, the amount shown on
page 34). Without enough space, maintenance cannot be
properly carried out, which may eventually result in a malfunction.
7 Check the window panes in front of
the projector before projecting images.
Light becomes weaker as it passes though a window pane. It is
recommended to have no more than one pane in front of the
projector in a projection room. (No pane is preferable.)
Moreover, part of the light coming from the projector will be
reflected off the surface of the panes. Be sure to position the
projector to prevent light from reflecting back into the lens.
Glass (tilted)
Light passing
Reflected light
through the
window
Place the projector in a position where light is not reflected back
into the lens. (e.g. Tilt the window pane in the projection room.)
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