Lamp information

Calculation of 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

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

See "Lamp Mode (Normal)" on page 51 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.

Warning message

When the Lamp indicator lights up red or a message appears suggesting it is time to replace the lamp, please install a new lamp or consult your dealer. An old lamp may cause a malfunction in the projector and in some instances the lamp may explode.

The Lamp indicator light and Temperature warning light will light up if the lamp becomes too hot. Turn the power off and let the projector cool for 45 minutes. If the Lamp or Temp indicator still lights up after turning the power back on, please contact your dealer. See "Indicators" on page 60 for details.

The following Lamp warning displays will remind you to change the lamp.

Message

Status

 

 

 

 

 

 

 

The lamp has been in operation for 2800 hours.

 

WARNING

 

 

 

Install a new lamp for optimal performance. If the

 

Replace the Lamp

 

 

 

projector is normally run with "Economic Mode"

 

The lamp life is over 2800 hours.

 

selected (See "Lamp Mode (Normal)" on page 51),

 

If the projected image gets

 

you may continue to operate the projector until the

 

darker, please replace the lamp.

 

2950 hour lamp warning appears.

 

 

 

 

OK

 

 

 

 

 

 

 

 

 

 

 

 

 

The lamp has been in operation for 2950 hours. A

 

WARNING

 

 

 

new lamp should be fitted to avoid the

 

Replace the Lamp

 

 

 

inconvenience of shutdown when the projector

 

Immediately

 

 

 

runs out of lamp time.

 

 

 

 

The lamp life is over 2950 hours.

 

It is strongly recommended that you replace the

 

Please replace the lamp, and reset

 

 

the lamp timer.

 

lamp at this age. The lamp is a consumable item.

 

OK

 

The lamp brightness diminishes with use. This is

 

 

 

normal lamp behavior. You can replace the lamp

 

 

 

whenever you notice that the brightness level has

 

 

 

 

 

 

significantly diminished. If the lamp is not

 

 

 

replaced beforehand, it must be replaced after 2950

 

 

 

hours usage.

 

 

 

 

56 Maintenance

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BenQ MP770 user manual Lamp information, Calculation of lamp hour