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Application 2: Controlling Projectors that Require Power Off
Confirmation
Some projectors controlled via IR require the Power Off button on the hand-held remote
control to be pressed twice to turn off the projector. These projectors usually present
a prompt (similar to the one shown below) on the image, instructing you to press the
Power Off button again to confirm your intent to power off the projector. (If the projector is
controlled via RS-232, this prompt is usually not displayed.)
Yes: Press Again No: Please Wait
Turn Power OFF?
Figure 35. Typical Projector Power Off Confirmation Prompt
The MLC 52 can be configured so that the projector Power Off button does not need
to be pressed twice for confirmation. Using the macro mode feature, you can send two
power off commands sequentially from a single press of the MLC Off button.
To configure the MLC Off button to issue both a power off and a power off confirmation
command:
1. Ensure that power is applied to the MLC 52.
2. Set configuration DIP switch 1 on the rear panel to On (up).
3. Program the first two command memory blocks (commands 1 and 2) on the MLC
Off button with a projector off command (see Configuring Using IR Learning on
page 18 for procedures).
MLC 52
DISPLAY
ON
PC
VIDEO
OFF
VOL
VOL
Command 1: Off
Command 2: Off
Set button to macro mode.
Figure 36. Programming the Off Button for a Projector that Requires a
Confirmation
Transmitting MLC
Receiving MLC
1
ON
2 3 4
1
ON
234
1
ON
234
MLC 52 MediaLink Controllers • Special Applications 38