Ask Proxima C445 Users Guide

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Pow e r  S av e: automatically turns the lamp off after no signals are 
detected for 20 minutes. After 10 additional minutes with no signal, the 
projector powers down. If an active signal is received before the projec-
tor powers down, the image will be displayed. 
Screen Save: automatically blanks the screen after no signals are 
detected for five minutes. The image returns when an active source is 
detected or a remote or keypad button is pressed. Screen Save is disabled 
when Power Save is...

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Custom Key (for use with optional remote only): allows you to assign a dif-
ferent function to the Custom key on the optional remote to quickly and 
easily use the effect. Only one effect can be enabled at a time. The default is 
Source Info; highlight an effect and press Select to choose a different one.
Blank: shows an empty screen. 
Mute: turns off all sound. 
Aspect Ratio: sets the ratio of the image width to image height.
Source: cycles through the available sources.
Auto Image: causes computer...

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Language: allows you to select a language for the onscreen display of 
menus and messages.
Service: to use these features, highlight them and press Select.
Factory Reset: restores all settings (except Lamp and Filter Hours and Net-
work settings) to their default after displaying a confirmation dialog box.
Reset Lamp Hours: resets the lamp hours counter in the Service Info menu 
to zero. Do this only after changing the lamp. It displays a confirmation dia-
log box.
Reset Filter Hours: resets the...

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MaintenanceCleaning the lens1
Apply a non-abrasive camera lens cleaner to a soft, dry cloth.
Avoid using an excessive amount of cleaner, and don’t apply the 
cleaner directly to the lens. Abrasive cleaners, solvents or other harsh 
chemicals might scratch the lens.
2
Lightly wipe the cleaning cloth over the lens in a circular motion. If you 
don’t intend to use the projector immediately, replace the lens cap.
Replacing the clock batteriesThe projector has a lithium Hitachi Maxell battery (part number...

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Replacing the projection lampThe lamp hour timer in the Service Info menu counts the number of hours 
the lamp has been in use. Twenty hours before the specified end of the 
lamp’s life, the message “Change lamp” briefly appears on the projected 
screen. 
NOTE: You can order new lamp housings from www.infocus.com (in select 
areas), your retailer or your dealer. Use only a replacement lamp with the 
same type and rating as the original lamp. 
The part number is SP-LAMP-027.1
Turn off the projector and...

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Loosen the three captive screws (marked by the arrows) on the lamp 
module.
5
Carefully remove the lamp module by grasping and lifting the handle. 
Dispose of the lamp in an environmentally proper manner. 
6
Install the new lamp module, making sure that it is properly seated, and 
tighten the three captive screws.
7
Replace the cover over the lamp module by sliding it back into place and 
tightening the screw.
8
Plug in the power cable, press the power switch then press the Pow e r 
button to turn...

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Cleaning the dust filter1
Turn off the projector and unplug the power cable. 
2
Wait 45 minutes to allow the projector to cool thoroughly.
WA R N I N G: To avoid burns, allow the projector to cool for at least 45 
minutes before you clean or replace the dust filter. 
3
Remove the dust filter cover on the side of the projector by pressing up 
on the two tabs at the cover ’s bottom. 
4
Pull the tab on the center of the black dust filter bracket and lift it off.
5
Clean the filter, cover, and vent using...

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AppendixProjected image sizeNOTE: Visit the Service section of our website for interactive image size cal-
culators for the standard and optional lenses.
Table 2: Projection sizes: Standard lens (1.5 - 1.8:1 throw ratio)
The image offset range for the standard lens is 9:1 (90%) to 1:1 (50%). Table 3: Projection sizes: Short Fixed lens (0.8:1 throw ratio)
Minimum Image Maximum Image
Distance 
(feet/m) Diagonal 
Image
(feet/m)Image 
Width 
(feet/m) Diagonal 
Image
(feet/m)Image 
Width 
(feet/m)
Min...

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Table 4: Projection sizes: Short Zoom lens (1.2 -2.0:1 throw ratio range) Table 5: Projection sizes: Long Throw lens (1.9 - 3.9:1 throw ratio range
Projection Distance (inch/m)
Screen Size
(inch/m)
 Minimum Maximum
40/1 39/1.0 63/1.6
60/1.5 59/1.5 94/2.4
70/1.8 67/1.7 110/2.8
100/2.5 98/2.5 157/4.0
120/3 118/3.0 189/4.8
150/3.8 150/3.8 240/6.1
200/5.1 197/5.0 319/8.1
250/6.4 248/6.3 402/10.2
300/7.6 299/7.6 480/12.2
350/8.9 350/8.9 559/14.2
Projection Distance (inch/m)
Screen Size
(inch/m)
 Minimum...

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Table 6: Projection sizes: Ultra Long Throw lens (3.9 - 7.4:1 throw ratio 
range
Projection Distance (inch/m)
Screen Size
(inch/m)  Minimum Maximum
40/1 122/3.1 236/6.0
60/1.5 189/4.8 354/9.0
70/1.8 220/5.6 513/10.5
100/2.5 315/8.0 594/15.1
120/3 382/9.7 717/18.2
150/3.8 476/12.1 898/22.8
200/5.1 638/16.2 1197/30.4
250/6.4 799/24.4 1496/45.6
300/7.6 961/28.5 1795/53.3
400/10.2 1283/32.6 2398/60.9
500/12.7 1602/40.7 3000/76.2EDX Ref Guide.fm  Page 39  Friday, June 30, 2006  10:48 AM