46 Maintenance
Light source information
Getting to know the light hour
When the projector is in operation, the duration (in hours) of light source usage is automatically
calculated by the built-in timer. The method of calculating the equivalent light hour is as follows:
1. Light Usage Time = (x+y+z+a) hours, if:
Time used in
Normal
mode = x hours
Time used in
ECO
mode = y hours
Time used in
SmartEco
mode = z hours
Time used in
LampSave
mode = a hours
2.
Equivalent Light Hour =
hours
, if
X= light source life spec of
Normal
mode
Y= light source life spec of
ECO
mode
Z= light source life spec of
SmartEco
mode
A= light source life spec of
LampSave
mode
A’ is the longest light life spec among X, Y, Z, A
To obtain the light hour information:
Go to
Advanced
menu
- System
>
Light Source Information
and press
OK
. The
Light Source
Information
page appears.
You can also get the light hour information on the
Information
menu.
For time used in each light 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 Light Hours
manually, it will probably have deviation from the value shown in
OSD menu since projector system calculates time used for each light mode in “Minutes” then rounds down to an
integer in hours shown in OSD.
D
D
A
'
X
----
F
u
A
'
Y
----
y
u
A
'
Z
----
z
u
A
'
A
----
a
u
+
+
+
=
