How to check the lamp usage – How to extend lamp life - projector - Benq TH670

Benq projector - Benq TH670 – How to check the lamp usage – How to extend lamp life – How to replace the lamp - How to reset the lamp hour

How to check the lamp usage time

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)
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. Open the OSD menu and go to the Advanced menu > System Setup: Advanced > Lamp Settings menu. Press OK on the projector or remote control.
2. Select Lamp Timer and press OK on the projector or remote control.
3. You will see the Equivalent Lamp Hour information displaying on the menu.
4. To leave the menu, press MENU on the projector or remote control.
You can also get the lamp hour information on the Information menu.

How to extend 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 or remote control.
Setting Lamp Power
Using Economic/SmartEco mode will reduces system noise and power consumption. If the Economic/SmartEco mode is selected, the light output will be reduced and result in darker projected pictures, the projector protected for longer working life.
Setting the projector in Economic/SmartEco mode also extends the lamp operation life. To set Economic/SmartEco mode, go to the Advanced menu > Picture > Lamp Power menu and press LEFT/RIGH.

Normal:  Provides full lamp brightness.
Economic: Lower brightness to extend the lamp life and decreases the fan noise.
SmartEco: Adjusts the lamp power automatically depending on the content brightness level.

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 to the Advanced menu > System Setup: Basic > Auto Power Off menu and press LEFT/RIGHT . 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.

How to replace the lamp

1. Turn the power off and disconnect the projector from the power outlet. If the lamp is hot, avoid burns by waiting for approximately 45 minutes until the lamp has cooled.
2. Loosen the screw on the lamp cover.

3. Remove the lamp cover by (a) pushing the lamp cover upward and (b) lifting it off.

# Do not turn the power on with the lamp cover removed.
# Do not insert your fingers between the lamp and the projector. The sharp edges inside the projector may cause injuries.

4. Loosen the screws that secure the lamp.

5. Lift the handle so that it stands up.

Use the handle to slowly pull the lamp out of the projector.

# Pulling it too quickly may cause the lamp to break and scatter broken glass in the projector.

# Do not place the lamp in locations where water might splash on it, children can reach it, or near flammable materials.
# Do not insert your hands into the projector after the lamp is removed. If you touch the optical components inside, it could cause color unevenness and distortion of the projected images.

6. Insert the new lamp into the lamp comparent and make sure it fits in the projector.

7. Tighten the screws that secure the lamp.

# Loose screw may cause a bad connection, which could result in malfunction.
# Do not over tighten the screws

8. Ensure the handle is fully laid flat and locked in place.

9. Replace the lamp cover by sliding it into place.

10. Tighten the screw that secures the lamp cover.

# Loose screw may cause a bad connection, which could result in malfunction.
# Do not over tighten the screw.

11. Restart the projector.

Do not turn the power on with the lamp cover removed.
How to reset the lamp hour
12. After the startup logo, open the OnScreen Display (OSD) menu. 

Go to the Advanced menu > System Setup: Advanced > Lamp Settings > Reset Lamp Timer menu and press OK on the projector or remote control.

A warning message displays asking if you want to reset the lamp timer. 

Select Reset and press OK on the projector or remote control. 

The lamp time will be reset to '0'.
Do not reset if the lamp is not new or replaced as this could cause damage.