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Iris Adjustment

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Tip by DJRobx:   "Someone posted a question about the IRIS in another thread, and it received lots of negative responses due to the horrible default values and lack of ability to control it.

You *can* control the IRIS through the service menu, and it's one of my favorite features of the set. I can now enjoy my set in any ambient light and not have to touch my perfectly-calibrated brightness setting.

DISCLAIMER: When doing anything in the service menu, always write down the original values and don't muck with anything else as you can screw up your set!

How it Works

The Iris is a light sensor that returns a value 0-255 that represents the ambient light in the room. Your TV can hold 3 different brightness and contrast settings that it will automatically adjust to as the light changes.

Before you Start

First you need to decide where you want your brightness and contrast values for a dark room, a lighted room at night, and daylight.

Start with a dark room at night, and adjust the brightnes and contrast controls the minimum setting. This is 0. Count the number of steps it takes to get to the brightness and contrast setting you want. Write down the number you get for brightness and contrast, and label them BR0 and CN0 respectively. (Note: the center is 15, and the far right is 31)

Now turn the lights on, and repeat the above process. Label those numbers BR1 and CN1. Wait until daylight. Repeat the above process again, and label those numbers BR2 and CN2.

Changing it

Go into the Service Menu (Menu, 2, 3, 5, 7). Press the <Audio> button until the display reads "IRIS". Press Video to scroll through the available settings:

CN0, CN1, CN2 (0-31):

Enter the three contrast settings you wrote down by using the up and down arrows on the remote.

BR0, BR1, BR2 (0-31):

Enter the three brightness settings you wrote down.

0TO1,1TO2 (0-255):

These are the sensor values at which the set will change brightness settings. For example, if 0TO1 was 100, and 1TO2 was 200, a reading of 50 would be setting 0, 150 would be setting 1, and 230 would be setting 2.

Unfortunately, there's no way of telling what the current IRIS reading is. But, in my environment, I use an extremely low 0TO1 setting (42) and an extremely high 1TO2 setting (240), there doesn't seem to be a lot of room in between. This is what requires the most experimentation.

Press <enter> to save the new settings, and you're done! Enable the Iris and start experimenting with different 0TO1 and 1TO2 values to make the set adjust itself at the right times based on the ambient light."