Electrohome Vistagraphx 10k Roadie Users Manual

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à As screen size increases, magnification increases which reduces
brightness. Select a screen size which is appropriate for the venue,
but not larger than that required.
à Installing a large screen in a small room is similar to watching
television close up; too large a screen can overpower a room. A good
rule of thumb is to be no closer than 1.5 times the width of the
screen.
à Larger screens require greater attention to lighting conditions.
· When laying out the projection room, consider positioning the projector and
screen in a manner which will achieve maximum audience coverage and
space efficiency. For example, placing the screen along the larger wall in a
rectangular room will reduce audience coverage. Figure 2-8 shows two
examples of how audience coverage is maximized.
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Installation type, screen type, and lighting all affect where the projector is
positioned. In addition, both throw distance (the distance between the projector
and screen) and vertical position (the height of the projector in relation to the
screen) must be determined for every new installation. Both depend on the
screen size and projector lens type you are using. Make sure that the room can
accommodate the required position of the projector for the chosen screen size.
Throw distance is the distance between the projectors front feet and the screen.
It is measured perpendicular to the lens surface and screen surface. As you move
the projector farther from the screen, the image becomes larger.
Throw distance is roughly equal to the horizontal width of the screen multiplied
by the type of lens you are using. For example, if you are using a 3.9:1 lens,
throw distance should be approximately 3.9 
[ the screen width. Once you know
your screen size, you can estimate how far away the projector should be, as
shown in Table Chapter 2 -1. 
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For exact placement in an
installation, always refer to the throw distance formula and/or graph for your
lens as listed in Appendix E.
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The table or cart should be reasonably level. Fine adjustments to the projector
level can be made by adjusting the height of the projector legs; refer to 2.7,
Leveling for details.
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Note that Vista
GRAPHX 10K can be rotated and mounted at any vertical angle-i.e.,
you can tilt the projector forwards or backwards as much as desired for your
application. The side-to-side tilt, however must not exceed 15° (see Figure 2-10).
This limit ensures that the arc lamp in the projector operates properly and safely.
Always make sure that exhaust air from the projector does not vent towards the
lens, otherwise you may detect heat waves in your projected image.
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You must use an Electrohome ceiling mount fixture if the projector is to be
inverted and suspended. For more information, contact your dealer.
In rear screen applications where space
behind the projector is limited, a mirror
may be used to fold the optical path. See
Figure 2-11. The position of the projector
and mirror must be accurately set — if
considering this type of installation, call
your dealer for assistance.
The front panel of the projector has two standard input panels to which you may
connect a variety of sources. The upper right panel (Input 1) accepts an RGB
input from an external RGB source with audio follow-through. The lower left
panel (if video decoder module is installed) accepts composite video (Input 3) or
S-video (Input 4) and audio from devices such as video tape or disk players.
There are also several optional interfaces available for connecting other sources
(Input 2). Such an option installs in the upper left panel. See Figure 2-12. )ROGHG#2SWLFV
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The RGB input (Input 1) includes BNC type connectors for connection to a
variety of RGB sources. Such sources include VGA, SVGA, XGA, Mac,
PowerMac, DEC, Sun, SGI and others. Vista
GRAPHX 10K supports multiple sync
types: sync-on-green for data, composite, and separate H & V.
NOTE: Depending on the source, you may need a custom adapter cable that has
BNC connectors at the projector end and different type of connector at the other
(such as a 15-pin D connector for computer sources).  Contact your dealer.
Connect the sync BNC input(s) first. Then connect the red, green and blue
source outputs to the RED, GREEN, and BLUE inputs on the panel. If the source
uses sync-on-green, only the red, green, and blue connections are required. If the
source provides a composite sync output, connect it to the H/C SYNC input. If
the source provides separate horizontal and vertical sync outputs, connect
horizontal sync to the H/C SYNC input and connect vertical sync to the V SYNC
input. See Figure 2-13.
Connect component video as follows:
Y to 
Green
U (also called B-minus-Y) to 
Blue
V (also called R-minus-Y) to 
Red
NOTES: 1) 
Vista
GRAPHX 10K does not automatically recognize a YUV signal.
When using YUV video, you must specify this signal type within the 
Image
Settings menu so that the projector can distinguish between this signal and other
RGB sources. See 
3.6, Adjusting the Image. 2) For best performance, do not
connect HDTV signals to Input 1 — this type of source requires the HDTV Input
Module (available as an option). 5*%#,QSXW
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To control audio levels in an audio/visual system, connect pre-amplified (line
level) audio inputs to the left and right channel audio inputs on the Input 1 panel.
Then connect the audio outputs to external audio amplification equipment for
sound output. All audio connection cables require standard RCA type phono
plugs.
The Composite/S-Video input provides simultaneous connection of both a
composite video source (Input 3) and an S-Video source (Input 4).
If connecting a S-Video source, use the 4-pin mini DIN connector 
or the Y and C
BNC connectors (luminance and chrominance) — do not use both as input. If
connecting a composite video source, use the Composite BNC connector 
or the
RCA phono jack — do not use both as input. See Figure 2-14.
NOTE: If using the loop-through feature for composite or S-Video input, see
Video Termination in 
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If you want to use an extra video source in addition to the video source(s)
connected at Inputs 3 and 4, connect either a Composite or S-Video source to
Input 1 as shown in Figure 2-15.
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Electrohome Optional Input Modules allow you to increase the total number of
inputs and to accommodate other signal types. These modules may be installed
in the upper left section of the control panel on the front of the Vista
GRAPHX 10K
(called Input 2). They are:
· RGB Input Module
· RGB Loop Thru Module
· Composite/S-Video Module
· HDTV Input Module 2WKHU#,QSXWV
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· PC Analog Input Module
· Vista Digital Input Module 
(available Fall ’98)
NOTES: 
1) Installation of optional interfaces must be done by qualified service
personnel only — contact your dealer.  
2) See 
Appendix F, Optional Input
Modules for a brief description of each interface.
Plug the twist-locking three-prong end of the integral AC line cord (30 amp, with
L6-30 plug) in a matching grounded AC outlet. 
Twist to secure. Input voltage to
the projector must be between 220 and 240 VAC, 50 or 60 Hz. The power source
must be capable of supplying 2800 watts (15 amps) of power to the projector.
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#Caution: Once the projector is turned off, the lamp cooling fans will
continue to run for approximately five minutes to ensure that the projector and
lamp have sufficiently cooled, at which point the fans will automatically shut off.
To avoid thermal stress to lamp, never unplug the line cord while the lamp
cooling fans are running. Do not unplug the projector or use the circuit breaker
switch in order to power down.
Vista
GRAPHX 10K is set up at the factory for use in a front screen, floor mount
orientation. If the installation is ceiling mount or rear screen, you may notice that
displayed images are upside down and/or reversed. To correct, you must change
the image orientation from within the Preferences menu (you may prefer to do
this before physically
installing the projector). See
Section 3, Operation for
further information.
In the Preferences menu,
highlight and select the
Image Orientation pull-
down list. From a front
screen floor mount
installation, select from Rear,
Inverted Rear, Front or
Inverted Front according to
your intended installation:
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For most installations, the
lens surface of the
Vista
GRAPHX 10K
projector must be parallel
to the screen to prevent
keystoning. To make
small corrections to the projectors level, rotate each leg as necessary to raise or
lower. For angled installations, see “Special Mounting” under 2.3, Projector
Position and Mounting earlier in this section.
Once the Vista
GRAPHX 10K is properly set up and projecting an image on screen,
you are ready to make quick lens adjustments.
Still in the Lens menu, adjust the focus slidebar until you obtain the best overall
image clarity.
If you are using a Vista
GRAPHX ILSÒ motorized zoom lens, press /HQV to display
the Lens menu. Adjust the zoom slidebar to decrease or increase the size of the
image at the current throw distance (range of adjustment is 3-97).
Still in the Lens menu, adjust the horizontal and/or vertical lens offset. The
maximum amount of image shift depends on the lens you are using — see 2.3,
Projector Position and Mounting for details. Adjust until you achieve the best
overall brightness without causing a distortion in picture geometry.
For complete information about adjusting the image through keypad commands
and on-screen menus, refer to Section 3, Operation.
Use serial communication ports when controlling Vista
GRAPHX 10K with a
personal computer having a serial interface or when using the projector with a
Marquee switcher. Vista
GRAPHX 10K serial ports are located on the lower right
portion of the projectors front control panel as shown in Figure 2-16.
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NOTES: 
1) All 
VistaGRAPHX 10K serial connections on this panel require a 9-
pin D connector. Refer to Appendix D  for complete cable wiring requirements.
2) The NETWORK OUT port is provided for networking applications only —
see If using multiple projectors, below.
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