Open engine control module circuit board with transistor heat-si…

Close-up of an opened automotive control module circuit board, showing a row of power transistors clamped to an aluminum heat-sink rail, a large square microcontroller chip, electrolytic capacitors, banded resistors and the multi-pin edge connector at right. The green PCB shows discoloration and dark residue around several components.

AI caption October 2003 · Photo 9 of 195