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38 Maintenance
2. Equivalent Light Usage time = hours
, if
X= lamp life spec of Normal mode
Y= lamp life spec of Economic mode
Z= lamp life spec of SmartEco mode
A= lamp life spec of Lamp Save mode
A’ is the longest lamp life spec among X, Y, Z, A
To obtain the lamp hour information:
1. Go to SYSTEM SETUP: ADVANCED > Light Settings and press OK. The LIGHT
SETTINGS page appears.
2. Press to select Light Usage Timer and press OK. The Light Usage Time information is
displayed.
You can also get the lamp hour information on the INFORMATION menu.
Extending Light Usage Time
• Setting the Light Mode
Go to PICTURE > Advanced > Light Mode and press / or press LIGHT MODE on the
remote control to select a suitable lamp power from among the provided modes.
Setting the projector in Economic, SmartEco, or Lamp Save mode extends lamp life.
• Setting Auto Off
This function allows the projector to turn off automatically if no input signal is detected after a set
period of time to prevent unnecessary waste of lamp life.
To s e t Auto Off, go to SYSTEM SETUP: BASIC > Auto Off and press / .
Timing of replacing the lamp
When the Lamp indicator lights up red or a message appears suggesting it is time to replace the lamp,
please consult your dealer or go to http://www.BenQ.com before installing a new lamp. An old lamp
may cause a malfunction in the projector and in some instances the lamp may explode.
For time used in each Light Mode shown in OSD menu:
• Time used is accumulated and rounded down to an integer in hours.
• When time used is less than 1 hour, it shows 0 hours.
When you calculate Equivalent Light Usage time manually, it will probably have deviation from the value shown in
OSD menu since projector system calculates time used for each Light Mode in “Minutes” then rounds down to an
integer in hours shown in OSD.
Lamp mode Description
Normal Provides full lamp brightness.
Economic Lowers brightness to extend the lamp life and decreases the fan noise.
SmartEco
Adjusts the lamp power automatically depending on the content brightness level while
optimizing display quality
Lamp Save
Adjusts the lamp power automatically depending on the content brightness level while
offering a longer lamp life.
α
α
A'
X
----
χ×
A'
Y
----
y×
A'
Z
----
z×
A'
A
----
a×+++=
38


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