Lamp Information - BenQ HT5550 User Manual

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:
1. Lamp Usage Time = (x+y+z) hours, if
Time used in Normal mode = x hours
Time used in Economic mode = y hours
Time used in SmartEco mode = z hours
2. Equivalent Lamp Hour =
A'
α × χ
--- -
= +
X
X= lamp life spec of Normal mode
Y= lamp life spec of Economic mode
Z= lamp life spec of SmartEco mode
A' is the longest lamp life spec among X, Y, Z,
For time used in each lamp 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 Lamp hour manually, it will probably have deviation from the value shown in OSD
menu since projector system calculates time used for each lamp mode in "Minutes" then rounds down to an integer
in hours shown in OSD.
To obtain the lamp hour information:
1. Go to SYSTEM SETUP: ADVANCED > Lamp Settings and press OK. The LAMP
SETTINGS page appears.
2. Press to select Lamp Timer and press OK. The Lamp Timer information is displayed.
You can also get the lamp hour information on the INFORMATION menu.
Extending lamp life
• Setting the Light Mode
Go to PICTURE > Advanced > Light Mode and press /
remote control to select a suitable lamp power from among the provided modes.
Setting the projector in Economic or SmartEco mode extends lamp life.
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
• 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 set Auto Off, go to SYSTEM SETUP: BASIC > Auto Off and press / .
α
hours
A' A'
× ×
y z
--- - --- -
+ , if
Y Z
or press LIGHT MODE on the
Maintenance 39