Acer P1255 User Manual page 37

Timeout (Min.)
Once "Security" is set to "On", you can set timeout function.
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User Password
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Security
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Press to select timeout duration.
The range is from 10 to 990 minutes.
When time is up, the projector will request you to enter
the password again.
The factory default setting of "Timeout (Min.)" is "Off".
Once the security function is enabled, the projector will
request you to enter password when switching on the
projector. Both "User Password" and "Administrator
Password" can be accepted for this dialogue.
Press to set up or change "User Password".
Use the numerical keys on the remote control to set the
password and press "MENU" to confirm.
To delete the digits, Press
Enter the password again when you see "Confirm
Password" displayed.
The password should be 4~8 digits in length.
If you select "Request password only after plugging
power cord", you are requested to input the password
every time the power cord is plugged. If you fail to enter
the correct password within 20 minutes upon request,
the projector will shut down automatically.
If you select "Always request password while projector
turns on", you are requested to input the password
every time the projector is turned on. If you fail to enter
the correct password within 20 minutes upon request,
the projector will shut down automatically.
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