Runco Cl 420 Projector User Manual

Operation
Runco CL-420 Owner’s Operating Manual 41 
• Auto Tune: Auto Tune automatically adjusts settings to optimize computer images. 
Auto Tune can be executed either on command or automatically whenever an 
incoming RGB signal is present. To execute Auto Tune on command, select Execute 
Auto Tune and press ENTER. To enable automatic Auto Tune, select Auto Tune and 
set it to ON. 
Image Position: To adjust the horizontal and vertical position of the projected image, 
select Image Position from the...

Operation
42 Runco CL-420 Owner’s Operating Manual
Information: Select Information from the Main Menu to see information about the current 
source, input resolution, horizontal and vertical frequencies, lamp hours and the installed 
firmware version. 
Should you ever need to contact Runco Technical Support, this information will help them 
answer your questions or resolve product performance issues. 
Restore Factory Settings: To reset all items in the Image Options menu to their factory 
default values,...

Operation
Runco CL-420 Owner’s Operating Manual 43 
Keystone Correction: If the projector and screen are not installed perpendicular to each 
other, the image may become distorted in a trapezoidal shape, as shown in 
Figure 4-10. 
Select Keystone from the Installation menu to compensate for this. 
Figure 4-10. Horizonal and Vertical Keystone Correction
Fan High Speed Mode: If the projector is being used in a high-altitude environment, use 
Fan High Speed Mode to prevent it from overheating. Set Fan High...

Operation
44 Runco CL-420 Owner’s Operating Manual
ISF Setting Use the ISF Setting menu to perform advanced picture quality adjustments. This menu 
should be used by ISF-certified technicians only. 
Several controls in this menu are identical to those in the Picture Adjust menu, but are 
accessible only by entering the ISF Calibration menu passcode. This makes it possible to 
restore the picture quality settings to what they were when the projector was installed, 
simply by recalling the “ISF Night” or...

Operation
Runco CL-420 Owner’s Operating Manual 45 
ICC Adjust: Use the ICC Adjust controls to customize the stored NTSC, HDTV and/or 
PAL color space characteristics. To do this:
1. Select ICC Adjust from the ISF Calibration menu and press ENTER. 
2. Select the color space to modify using the left- or right-arrow buttons. 
3. Select a component color (Red, Green, Blue, Cyan, Yellow or Magenta).
For each component color, you can adjust the following:
• Intensity: This slidebar adjusts the intensity --...

Operation
46 Runco CL-420 Owner’s Operating Manual
Blue Enable: Refer to Blue Enable on page 42. 
Splash Screen Timer: Press the right- or left-arrow buttons to set the Splash Screen 
Timer. This timer controls how long the startup (ISF and Runco logo) image stays 
on-screen after you turn on the projector. Select from 15 to 60 seconds, in 5-second 
increments.
Noise Reduction: To apply Digital Noise Reduction (DNR) to the input signal, select 
Noise Reduction from the ISF Calibration menu. Noise...

Runco CL-420 Owner’s Operating Manual 47 
5.1 
Cleaning the Projector
Unplug the power cord before cleaning the 
projector.
 Avoid using benzene or thinner, as these can 
damage the finish on the projector exterior.
 Do not use volatile agents, such as 
insecticides, on the projector.
 Do not leave rubber or plastic objects in 
contact with the projector for long periods as 
they may damage the finish of the projector.
Wipe off dirt gently with a soft flannel cloth.
 For hard-to-remove dirt, soak a...

Maintenance and Troubleshooting
48 Runco CL-420 Owner’s Operating Manual
5.3 
Cleaning the Intake 
and Exhaust Vents
This CL-420 is equipped with intake and 
exhaust vents to allow the flow of cool air 
through the projector and maintain the 
proper operating temperature.
You should periodically clean the vents by 
vacuuming them with a vacuum cleaner. 
Runco recommends doing this after every 
100 hours of use, or more often if the 
projector is used in a dirty or smoky 
location.
To clean the intake and...

Maintenance and Troubleshooting
Runco CL-420 Owner’s Operating Manual 49 
5.5 
Lamp CautionsThis projector uses a pressurized mercury lamp. A loud sound may 
indicate lamp failure. Lamp failure is caused by excessive shock, 
improper cooling, surface scratches or deterioration of the lamp due 
to usage. The period of time up to failure largely varies depending on 
the individual lamp and the condition and the frequency of use. It is 
important to note that failure can often result in the bulb cracking....

Maintenance and Troubleshooting
50 Runco CL-420 Owner’s Operating Manual
5.6 
Lamp Replacement
1. Turn off the projector and wait for the cooling fan to stop. 
2. Unplug the power cord. Allow the projector to cool down for approximately one hour 
prior to removing the lamp assembly for replacement.
3.Loosen the two captive lamp cover 
screws and remove the cover. 
 
 
 
 
 
 
 
 
 
4. Loosen the four lamp assembly 
mounting screws.
5.Grasp the lamp assembly 
handle and pull gently, removing 
the lamp...