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The picture above illustrates which wire to pull for the ABG mod. The view is of the connector pod. The forth wire from the right (pin 4 on the connector) needs to be pulled. The connector pins do not solder into the board, but have a molded in tab on the connector body preventing them from pulling out. You can see the tab above. It is directly in front of the pin. Using an x-acto knife, carefully get between the pin and the tab, and pry towards you (away from the connector body) while pulling up on the wire. If you donīt have three hands, hold the board in a vise while you do this.
Once you have removed this lead, tape it with electrical tape to keep it from grounding. It is an active low output from this board, so grounding it will raise the ABG to the potential required to clear the image.
The images you get with this mod will be a stark contrast with what you are used to seeing. The hot pixels will be saturated on exposures of only a few seconds, and the dark signal will be low enough to not be an issue for many exposure durations.
If you use DarkGen to subtract your dark frames, I have added a function called "Map Hot Pixels" which takes into account the saturated pixels, and replaces them with the value of the previous pixel. It performs a normal subtraction if the pixel is not saturated. |
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