Boxlight Cd-40m Users Guide

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Using the Projector
Rear Projection
When you turn Rear Projection on, the projector reverses the 
image so you can project from behind a translucent screen. High-
light Rear Projection, then click either mouse button to turn this 
feature on and off.
Default Source
Default Source toggles between Computer and Video. This deter-
mines which source the projector checks first for active video 
during power-up. Highlight Default Source and click either 
mouse button to toggle between the options.
Auto Source Select
This setting toggles between On and Off. When this feature is Off, 
the projector defaults to the source selected in Default Source. To 
display another source, you must manually select one by press-
ing the 
source button on the keypad. When this feature is On, the 
projector automatically finds the active source, checking the 
default source first. Highlight Auto Source Select and click either 
mouse button to turn this feature on and off.
Plug and Play
This setting toggles between On and Off. When it is On, most 
new computers will automatically recognize the projector, then 
set the monitor resolution and refresh rate accordingly. You need 
to set the Plug and Play setting to Off for the projector to display 
properly on some older computers. The Plug and Play setting 
does not affect video images. 
If the projector ’s display constantly changes between the com-
puter image and the message, “Perfecting the image”, you may 
need to set Plug and Play to Off.
Display Messages
This setting toggles between On and Off. When this feature is On, 
status messages such as “No signal detected” or “Standby 
Active” appear in the lower-right corner of the screen. Click 
either mouse button to turn this feature off and not see status 
messages. 
						

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Display Startup Screen
This setting toggles between On and Off. When this feature is On, 
the startup screen appears when the projector starts up and 
remains until an active source is detected. Click either mouse but-
ton to turn this feature off and display a plain black or blue screen 
instead of the startup screen. 
Language Menu
FIGURE 17
Language menu
You can display the on-screen menus in English, French, German, 
and Spanish. 
•Move the cursor to the language you want, then click either 
mouse button. The menus redraw immediately. 
						

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Using the Projector
Status Menu
This is a read-only window for informational purposes. To dis-
play the status window, select Show status from the menu, then 
click either mouse button. To remove the window, click either 
mouse button.
FIGURE 18
Status menu
Lamp hours used
Indicates how many hours the current lamp has been in use. The 
counter starts at zero hours and counts each hour the lamp is in 
use. Change the bulb when the brightness is no longer accept-
able. See “Replacing the Projection Lamp” on page 29 for details.
Computer resolution 
Shows your computer ’s resolution setting. To change this, go to 
your computer ’s Control Panel and adjust the resolution in the 
Display tab. See your computer ’s user ’s guide for details.
Horizontal refresh rate
The time period that one horizontal line is displayed.
Ve r t i c a l  r e f r e s h  r a t e
The time period that one video frame is displayed. 
						

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Mute status
Indicates if the audio is muted.
Software version
Indicates the projector ’s software version. This information is 
useful when contacting Technical Support.
CablePro version
Indicates the CablePro’s software version. This information is 
useful when contacting Technical Support. No version is listed 
for the CablePro Lite cable.
Source
Indicates the active source, Computer or Video.
Speakers
Indicates if external speakers are connected. 
						

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MAINTENANCE & TROUBLESHOOTING
This section describes how to:
•clean the lens
•replace the projection lamp 
•use the Kensington lock feature
•troubleshoot the projector
Cleaning the Lens
Follow these steps to clean the projection lens:
1Apply a non-abrasive camera lens cleaner to a soft, dry cloth.
•Avoid using an excessive amount of cleaner.
•Abrasive cleaners, solvents or other harsh chemicals might 
scratch the lens.
2Lightly wipe the cleaning cloth over the lens.
3If you don’t intend to use the projector immediately, replace 
the lens cap.
Replacing the Projection Lamp
WARNING: To avoid burns, 
allow the projector to cool for at 
least 30 minutes before you open 
the lamp module door. Never 
extract the lamp module while the 
lamp is operating.
The lamp hour counter in the Status menu counts the number of 
hours the lamp has been in use. The projector uses a metal halide 
bulb. These types of bulbs deteriorate over time. Replace the 
lamp when the brightness is no longer acceptable. You can order 
new lamp modules from Boxlight. See “Accessories” on page 39 
for information.
Follow these steps to replace the projection lamp:
1Turn off the projector and unplug the power cord. 
2Wait 30 minutes to allow it to cool thoroughly.
3Place the projector on its side, then insert a small screwdriver 
or other flat object into the tabs on the lamp module door (Fig-
ure 19). 
						

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Maintenance & Troubleshooting
4Pull the lamp door up and remove it.
FIGURE 19
Removing the lamp door
CAUTION: Never operate the
projector with the lamp door open
or removed. This disrupts the air
flow and causes the projector to
overheat.
5Loosen the two non-removable screws on the outside of the 
module.
FIGURE 20
Loosening the screws on the lamp module 
						

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6Slide the lamp connector to the right to disconnect it from the 
projector (Figure 21).
FIGURE 21
Sliding the lamp connector
7Remove the module (Figure 22).
WARNING: Do not drop the 
lamp module or touch the glass 
bulb! The glass may shatter and 
cause injury.
F
IGURE 22
Removing the lamp module 
						

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Maintenance & Troubleshooting
8Align the new lamp module in the correct direction.
9Gently push the module in as far as it goes.
10Tighten the screws on the outside of the module. 
11Slide the lamp connector to the left to re-attach it.
12Insert the tabs at the top of the lamp door into the projector 
and press the lamp door into place.
13Plug in the power cord and turn the projector back on.
14To reset the lamp hour counter in the Status window, press 
and hold the left mouse button, then press the menu button 
(while still holding down the mouse button) for 5 seconds. 
Verify that the counter was reset by pressing the menu button 
and viewing the counter in the Status window.
Using the Kensington Lock 
The projector has a Kensington Security Standard connector for 
use with a Kensington MicroSaver Security System (Figure 23). 
Refer to the information that came with the Kensington System 
for instructions on how to use it to secure the projector.
FIGURE 23
Installing the Kensington lock 
						

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Troubleshooting
Problem: Nothing on projection screen
•Make sure that the power cord is properly connected to a func-
tional AC electrical outlet. Make sure that the power cord is 
also properly connected to the projector.
•If the projector is plugged into a power strip, make sure the 
power strip is turned on.
•Make sure you have removed the lens cap on the projection 
lens at the front of the projector.
•Make sure the projector is switched on.
•Check the projector ’s lamp to ensure that it is securely con-
nected in the lamp module. See “Replacing the Projection 
Lamp” on page 29.
•Make sure that the cables do not have any bent pins.
Problem: Color or text not being projected
•You might need to adjust the brightness up or down until the 
text is visible. Refer to “Brightness” on page 18 for more infor-
mation.
Problem: The screen resolution is not right
•Make sure the computer ’s video card is set for a resolution of 
no greater than 1024x768. A resolution of 800x600 yields the 
highest quality image.
Problem: Image isn’t centered on the screen
•Reposition the image. Refer to “Horizontal position” on 
page 22 and “Vertical position” on page 22.
•Be sure the projector is at a 90 degree angle to the screen.
Problem: Only the start-up screen displays
•Verify that the cables are connected correctly. See page 7 
through page 9 for connection procedures.
•Verify that the proper input source is connected. See “Source” 
on page 15.