Runco Cl 420 Projector User Manual

							Runco CL-420 Owner’s Operating Manual 11 
3.1 
Remote Control
To install batteries in the remote control: 
1. Press down the tab on the cover and pull 
the cover in the direction of the arrow.
 
 
 
 
2. Insert the included batteries. Ensure that 
the polarities correctly match the 
 and 
 markings inside the battery 
compartment. 
 
3. Insert the lower tab of the cover into the 
opening, and press down the cover until it 
clicks in place.
Notes on Batteries When installing batteries, make sure that the battery polarities are correct.
 Do not mix an old battery with a new one or different types of batteries.
 If you will not use the remote control for a long time, remove the batteries to avoid 
damage from battery leakage.
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12 Runco CL-420 Owner’s Operating Manual
Notes on Remote Control 
Operation
The remote control can be used to control the projector within the ranges shown in Figure 
3-1. 
Figure 3-1. Available Range of the Remote Control
 For best results, hold the remote control within 23 feet (7m) of the back or top sensor 
and aligned within 30°.
 Do not drop the remote control or expose it to moisture or high temperature.
 The remote control may malfunction under a fluorescent lamp. If that occurs, move the 
projector away from the fluorescent lamp.
 Make sure that there is nothing obstructing the infrared beam between the remote 
control and the IR receiver on the projector.
 If the effective range of the remote control decreases, or it stops working, replace the 
batteries with new ones.
 Ambient conditions may possibly impede the operation of the remote control. If this 
happens, point the remote control at the projector, and repeat the operation.
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The signal from the remote control can be reflected by the screen.Note 
						

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Runco CL-420 Owner’s Operating Manual 13 
3.2 
Quick Setup
Table 3-1 gives a quick overview of the CL-420 installation process. The sections 
following this one provide detailed instructions.
Installation should be performed by a qualified custom video 
installation specialist.
Table 3-1. Installation Overview 
StepProcedureFor Details, refer to 
page...
1Choose a location for the projector14
2Connect signal sources to the projector20
3Connect external controller to RS-232 port (optional)25
4Apply power to the projector 27
5For rear-screen and/or ceiling-mount installations, select 
the proper picture orientation 28
6Lens adjustments: projected image size (zoom), position 
(shift) and focus16, 29
7Projector calibration: adjust the following for each input, 
starting with Component SD; save settings when finished:
 Aspect ratio
 Brightness
 Contrast
 Color level
 Tint
 Input position
32 through 41
Note 
						

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14 Runco CL-420 Owner’s Operating Manual
3.3 
Installation 
Considerations
Proper installation of your projector will ensure the quality of your display. Whether you are 
installing a projector temporarily or permanently, you should take the following into 
account to ensure your projector performs optimally.
Installation Type Choose the installation type that best suits your needs: front or rear screen, floor mount or 
inverted mount. 
Table 3-2 compares these various installation methods. 
Ambient Light In general, minimize or eliminate light sources directed at the screen. Contrast ratio in your 
images will be noticeably reduced if light directly strikes the screen, such as when a shaft 
of light from a window or floodlight falls on the image. Images may then appear washed 
out and less vibrant.
Other Considerations Other considerations and tips that can help improve your installation:
 Keep the ambient temperature constant and below 35°C (95°F). Keep the projector 
away from heating and/or air conditioning vents. Changes in temperature may cause 
drifts in the projector circuitry, which may affect performance.
 Keep the projector away from devices that radiate electromagnetic energy such as 
motors and transformers. Common sources of these include slide projectors, 
speakers, power amplifiers and elevators. 
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Table 3-2. Projector Installation Options 
AdvantagesConsiderations
Front Screen, Floor Mount Installation
 Easy to set up
 Can be moved or changed quickly
 Easy to access
 Shares floor space with audience
Front Screen, Inverted Mount (ceiling) Installation
 Does not take up audience space
 Projector is unobtrusive
 Projector cannot be accidentally moved
 Installation is more permanent 
 Projector access is more difficult 
Rear Screen, Floor Mount Installation
 Projector is completely hidden
 Projector is easily accessed
 Usually good ambient light rejection
 Requires separate room
 Installation cost is usually higher
Rear Screen, Inverted Mount (ceiling) Installation
 Projector is completely hidden
 Usually good ambient light rejection
 Requires separate room
 Installation cost is usually higher
Rear Screen, Floor Mount with Mirror
 Projector is completely hidden
 Usually good ambient light rejection
 Requires less space behind screen than 
other rear screen installations
 Requires separate room
 Installation cost is usually higher
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Runco CL-420 Owner’s Operating Manual 15 
Throw DistanceThrow distance is the distance measured from the front of the projector to the screen. 
This is an important calculation in any projector installation as it determines whether or not 
you have enough room to install your projector with a desired screen size and if your 
image will be the right size for your screen.
You can quickly estimate the throw distance by taking the width of the screen and 
multiplying it by the lens throw ratio; see 
Figure 3-2.
The CL-420 has a lens throw ratio of between 1.40 and 1.70.
The result of this calculation tells you roughly how far back the projector should be 
positioned from the screen in order to project a focused image large enough to fill the 
screen.
For example, with an 8-foot (96-inch) wide screen (the maximum recommended screen 
width for this projector), the CL-420 has a throw distance range of between 134.4 inches 
(3.41 meters) and 163.2 inches (4.14 meters).
Figure 3-2. Estimating Throw Distance
Estimating Throw Distance (TD)
Minimum  TD  = Screen Width  x  1.40
Maximum  TD  = Screen Width  x  1.70
Screen width (w)
TD 
						

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16 Runco CL-420 Owner’s Operating Manual
Vertical and Horizontal 
Position
Proper placement of the projector relative to the screen will yield a rectangular, 
perfectly-centered image that completely fills the screen. 
Ideally, the projector should be positioned perpendicular to the screen and in such a way 
that the lens center and screen center are aligned with each other, as shown in 
Figure 3-3.
Figure 3-3. Projector Placement
Vertical and Horizontal 
Lens 
Shift
If it is not possible to align the projector and screen as shown in Figure 3-3, you can use 
the lens shift controls to center the image on the screen. Lens shift is generally expressed 
as a percentage of the screen height or width, as shown in 
Figure 3-4 and Figure 3-5. 
Vertical Lens Shift: The CL-420 provides up to 46% of upward vertical lens shift and up 
to 63% of downward vertical lens shift. For example, with a 96 x 54-inch (16:9) screen, 
you can shift the image up to 24.84 inches (0.63 meters) above or 34.02 inches 
(0.86
 meters) below the screen center.
Horizontal Lens Shift: The CL-420 provides up to 8% of horizontal lens shift in either 
direction (left or right). For example, with a 96 x 54-inch (16:9) screen, you can shift the 
image up to 7.68 inches (19.51 cm) left or right of the screen center.
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Height
Projection DistanceCeiling
Ceiling Installation
Screen
Height 
Floor Lens Center
Projection Distance
Floor Installation
Lens Center
x
Lens Center
x
ScreenLens Center
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Runco CL-420 Owner’s Operating Manual 17 
Figure 3-4. Vertical Lens Shift
1. With no vertical or horizontal lens shift, the lens center and 
screen center are aligned with each other.
2. Vertical shift limits are percentages of the screen height. 
Horizontal shift limits are percentages of the screen width.
3. Vertical offset figures apply to ceiling mount 
configurations. For floor installations (where the projector is 
upright), reverse the up/down vertical offset percentages. 
4. Using vertical lens shift reduces the horizontal lens shift range 
and vice versa.
Note
Base plate
to lens center =
approx. 4 (depending
on the amount of lens shift)
50% Height
Lens Shift 
(0.5 x H)
100% Height
Lens Shift
(1.0 x H)
150% Height
Lens Shift
(1.5 x H)
Screen Center0%
Note: This is a general example of lens shift. Lenses vary in their shift capabilities. No particular 
lens is used in this example. 
						

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18 Runco CL-420 Owner’s Operating Manual
Figure 3-5. Horizontal Lens Shift
Adjusting the Projection 
Angle
If the screen is significantly higher or lower than the projector, you can also tilt the 
projector at a slight angle. In a ceiling installation, you do this by adjusting the ceiling 
mount. For a floor installation, turn the four adjustable feet on the bottom of the projector 
to adjust the projector height and/or projection angle.
If you do this, you may need to shift the image or apply keystone correction using the 
on-screen display (OSD) controls, to compensate. For detailed instructions, refer to 
Using 
the On-Screen Menus on page 30.
0%Screen Center
100% Width Lens Shift
(1.0 x W)
50% Width Lens Shift 
(0.5 x W) 150% Width Lens Shift
(1.5 x W)
Screen Width (W)
Note: This is a general example of lens shift. Lenses vary in their shift capabilities. No particular 
lens is used in this example.
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Runco CL-420 Owner’s Operating Manual 19 
MountingThere are several methods for mounting the projector. Depending on your chosen 
installation, one method may be more suitable than another. 
Floor Mounting: In typical front and rear screen installations the projector can be 
mounted to a secure and level surface, such as a table or cart. Carts are useful when 
moving a projector during a presentation or from site to site. If possible, lock the wheels 
when it’s in position to prevent it from being moved during a presentation.
Ceiling Mounting: The projector can also be inverted and suspended from the ceiling 
using a specially designed ceiling mount fixture. This type of mounting is recommended 
for fixed installations and for those that want the projector out of sight or have a limited 
space for projector and audience.
Folded OpticsIn rear screen applications where space behind the projector is limited, a mirror may be 
used to fold the optical path, as shown in 
Figure 3-6. The position of the projector and 
mirror must be accurately set. If you are considering this type of installation, contact your 
dealer for assistance.
Figure 3-6. Folded Optics
Use only the Runco-approved ceiling mount kit designed for your 
projector. Note 
						

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20 Runco CL-420 Owner’s Operating Manual
3.4 
Connections to the 
CL-420
Proceed as follows to connect the CL-420 to your video sources, external controller(s) -- if 
present -- and AC power. 
When connecting your equipment:
 Turn off all equipment before making any connections.
 Use the correct signal cables for each source.
 Ensure that the cables are securely connected. Tighten the thumbscrews on 
connectors that have them. 
Connector Panel AccessTo access the connector panel, pull firmly on the cable access cover to open it.
Connecting the CL-420 to 
Source 
Components
Connect your video sources to the CL-420 as shown and described in the sections that 
follow.
DVI Connections: The CL-420 has a DVI input for connecting a DVD player, DTV 
decoder, personal computer or any other device with a DVI or HDMI output. Connect 
such devices as shown in 
Figure 3-7 or Figure 3-8. 
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Use the DVI inputs whenever possible. This ensures the highest 
video quality because the signal is carried in the digital domain 
throughout the entire signal path, from source component output 
into the projector. 
This CL-420 supports the VESA Display Data Channel (DDC) 
standard. This standard provides “Plug and Play” capability; the 
projector and a VESA DDC-compatible computer communicate their 
setting requirements, allowing for quick and easy setup.
In order for Plug and Play to work correctly, you must turn on the 
projector before you turn on the connected computer.
Tip
Note