This is the equipment needed to read, erase, and re-program the calibration chips in GM ECM's. The chip programmer simply reads chips and saves the data to the computer; and copies data from the computer to a blank chip. The chip eraser contains a hard-UV mercury lamp which will erase an EPROM chip that is equipped with a "window" for erasure. I have modified the chip eraser to erase the EPROM chip inside a CALPAK without removing the chip from the carrier. The hole drilled in top of the chip eraser allows the hole in the top of the CALPAK to be placed face-down over the exposed mercury lamp, and easily erased. The tinted circle can be rotated over the exposed lamp for "normal" use of the eraser, to keep the hard-UV rays from exiting the eraser.

The blue and tan module is a CALPAK. It is basically an EPROM chip soldered into a carrier. I want to erase and re-program these without modifying them or attempting to remove the chip from the CALPAK. (to maintain reliability) Above is a CALPAK positioned over the eraser lamp.

I made the little circuit board to adapt the CALPAK directly to the EPROM programmer, seen in use below. It is just a cheap Radio Shack IC board with some old resistor leads soldered into it.