Locking Control Keys; O Perating In A High Altitude Environment - BenQ MX854UST User Manual

Locking control keys

W ith the control keys on the projector locked, you can prevent your projector settings
from being changed accidentally (by children, for example). W hen the
on, no control keys on the projector will operate except
1. Go to the
pressing
2. H ighlight
To release panel key lock, use the remote control to enter the
Panel Key Lock
• Keys on the remote control are still active when panel key lock is enabled.
• If you press
projector will still be in locked status the next time it is turned on.

O perating in a high altitude environment

W e recommend you use the
1500 m –3000 m above sea level, and temperature is between 0°C–30°C .
Do not use the H igh Altitude Mode if your altitude is between 0 m and 1500 m and temperature
is between 0°C and 35°C. T he projector will be over cooled, if you turn the mode on under such
a condition.
To activate the
1. Press
menu is highlighted.
2. Press
confirmation message displays.
3. H ighlight
O peration under "
because of increased fan speed necessary to improve overall system cooling and
performance.
If you use this projector under other extreme conditions excluding the above, it may
display auto shut-down symptoms, which is designed to protect your projector from over-
heating. In cases like this, you should switch to H igh Altitude mode to solve these
symptoms. H owever, this is not to state that this projector can operate under any and all
harsh or extreme conditions.
44 O peration
System Setup: Basic > Panel Key Lock
◄ ►
/ on the projector or remote control. A confirmation message appears.
Yes MO DE/EN T ER
and press
menu and press
POW ER to turn off the projector without disabling panel key lock, the
H igh Altitude Mode
H igh Altitude Mode
MEN U /EX IT
and then press
▼
H igh Altitude Mode
to highlight
Yes MODE/EN T ER
and press
H igh Altitude Mode
to confirm.
◄ ►
O ff
/ to select .
when your environment is between
:
◄ ►
/ until the
and press
.
" may cause a higher decibel operating noise level
Panel Key Lock
POW ER
.
menu, and select
System Setup: Basic >
System Setup: Advanced
◄ ►
O n
/ to select
is
O n
by
. A