BenQ MP780ST+ User Manual download pdf (Page 91)

Maintenance 91

Lamp information

Getting to know the lamp hour

When the projector is in operation, the duration (in hours) of lamp usage is automatically

calculated by the built-in timer. The method of calculating the equivalent lamp hour is as

follows:

Total (equivalent) lamp hour

= 1 (hours used in Economic mode) + 4/3 (hours used in normal mode)

See "Setting Lamp Mode as Economic" below for more information on Economic mode.

The lamp hour in Economic mode is calculated as 3/4 of that in Normal mode. That is, using the

projector in Economic mode helps to extend the lamp hour by 1/3.

To obtain the lamp hour information:

1. Press MENU/EXIT and then press / until the SYSTEM SETUP: Advanced

menu is highlighted.

2. Press to highlight Lamp Settings and press MODE/ENTER. The Lamp

Settings page displays.

3. You will see the Equivalent lamp hour information displaying on the menu.

4. To leave the menu, press MENU/EXIT.

You can also get the lamp hour information on the INFORMATION menu.

Extending lamp life

The projection lamp is a consumable item. To keep the lamp life as long as possible, you can do

the following settings via the OSD menu.

Setting Lamp Mode as Economic

Using Economic mode reduces system noise and power consumption by 20%. If the

Economic mode is selected, the light output will be reduced and result in darker

projected pictures.

Setting the projector in Economic mode also extends the lamp operation life. To set

Economic mode, go into the SYSTEM SETUP: Advanced > Lamp Settings >

Lamp Mode menu and press / .

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 > Operation Settings >Auto Power

Off menu and press / . The time period can be set from 5 to 30 minutes in 5-minute

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.

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BenQ MP780ST+ User Manual Page 91