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Join Date: Dec 2006
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Service Menu Access
First open up the regular Benq Menu using the remote
Go to the last menu item on the right (Information Menu)
After having selected the info menu, press up-down-up-down-up-down - enter
That's 3 sets of up/down's and one enter.
Then you're in the service menu. Navigate like regular menu but be careful not to change the values that you don't know what you are changing.
Adjusting the DI is a bit weird, you have to experiment with the IRIS settings which are on Tab # 8 in the service menu. This explanation is going to sound confusing, that is why its best you experiment with the settings yourself to figure it out (and then what I'm saying will start to make sense). There is really not any specific "correct" setting, as it all depends on your setup and your preferences on how aggressive you want to make the IRIS.
Dynamic Black is the MODE that causes the IRIS to be enabled as a Dynamic IRIS, but you should leave this off in the service menu before exiting (it's fine to turn it on and off while calibrating the IRIS). To rotate between Fixed and DI mode during normal viewing, it is not necessary to go back into the Service Menu, you just change Dynamic Black in the REGULAR menu to On or Off. When DB is OFF in the Service Menu, the Regular Menu can still override it and turn it back on which is why you leave DB off in the service menu. I think a lot of peoples' issues with their IRIS settings are because they are leaving the Dynamic Black = on in the SM, don't do that as it is not necessary and it actually defeats the ability to rotate between fixed and DI mode properly.
When Dynamic Black / Dynamic IRIS mode is enabled (again from the regular menu only is needed, OFF in the SM), the difference between the Aperture Max and Min setting is how far the IRIS closes down (sort of). Otherwise, when Dynamic Black is turned off, you can set the Aperture function like a fixed IRIS instead of a DI, and use it to control how bright the image is (by changing position, max, and min down low to like 5-8 but that is only how to do it for the fixed IRIS mode). However, you cannot control how bright the image is when using the IRIS in DI mode (you may have tiny control), as it does this automatically in DI mode. Only people that have small screens will probably want to use the DI as a fixed IRIS to lower the brightness down.
For adjusting the Dynamic IRIS in order to achieve the correct amount of aggressiveness for your setup, the thing is the 2 settings (Max and Min) don't really work separately they work together. If you raise the Max aperture setting up too high it will cancel out the Min Aperture if I recall correctly. It doesn't always seem to hold the settings, sometimes it resets on its own as it has bugs, but you'll get it after 5-10 minutes of experimenting. I found the aperture strength setting to not work right so I leave it at 2 and use the other settings to adjust the DI aggressiveness. After adjusting the IRIS, you may find a need to fiddle with Dynamic Black Reset and Reset Max/Min Aperture and/or Aperture Position Calibration in order for the settings to take and hold to a new DI strength. I do not recall exactly what combo works, but you just keep fiddling until you see a change in the DI. The way you test it and look for DI changes to take effect is on an ALL Black screen. Load up an all black-screen, then hit the regular Menu button on/off that will cause the Dynamic IRIS to close when it goes back to the black screen so you can see how aggressive the IRIS is being. Keep messing with the settings and then re-testing until the DI seems that it is responding correctly. You will have to go back and forth between the SM and Regular Menu several times and it is a bit tedious, but not too bad.
You can even FORCE the dynamic IRIS enabled in 3D mode by turning DB = on back in the service menu, but I wouldn't as it doesn't always work correctly (which is another reason to leave DB = off in the SM). It's been a long time since I've messed with this, so I apologize if I made a mistake in my explanation, but you'll figure it out.
BTW, I have about 5000 hours on the lamp now, and holy cow this thing is still super bright. If the lamp doesn't explode I can make it to 10,000 maybe given how bright it is.