BenQ MS531 User Manual page 60

The lamp modes are defined as the chart below.
Lamp mode
Normal
Economic
SmartEco
Setting Auto Power Off
This function allows the projector to turn off automatically if no input source is detected
after a set period of time to prevent unnecessary waste of lamp life.
To set Auto Power Off, go into the SYSTEM SETUP: Basic > Auto Power Off
menu and press
increments. If the preset time lengths are not suitable for your presentation, select
Disable. The projector will not automatically shut down in a certain time period.
Maintenance
60
Description
Provides full lamp brightness
Lowers brightness to extend the lamp life and decreases the
fan noise
Adjusts the lamp power automatically depending on the
content brightness level
/ . The time period can be set from 5 to 30 minutes in 5-minute