NEC LT20 - Manual (Page 27)

23 ... English
Setup
Menu Location
Choose the menu location on the display screen.
Orientation
 Front-Desktop
The factory default setting.
 Rear-Desktop
When you select this function, the projector reverses the image
so you can project behind a translucent screen.
Lamp Hour
Display the cumulative lamp operating time. The lamp hour in
OSM is calculated by “Normal mode”, when “ECO mode” is
selected, the system will convert from “ECO mode” lamp hour to
“Normal mode”.
Signal Type
Select signal type RGB or Video sources.
Search Signal Lock
When this function is turned off, the projector will search for other
signals if the current input signal is lost. When this function is
turned on, it will search specified connection port.
Fan Mode
Choose “High” to turn on High Altitude mode. Operates the fans at
full speed continuously to allow for proper high altitude cooling of
the projector. Choose ”Normal” to return standard mode.
User Controls
Remark :
The formula is : “ECO
mode” lamp hours x
0.67 = “Normal mode”
lamp hours.