Board explorer
Amiga motherboards, trace by trace. Tap a pad and the whole signal lights up on both sides of the board: use it to follow a trace eaten by battery acid or a leaking capacitor, and to see where each pin goes.
Signal names come from the schematic and continuity was worked out from the copper. Before soldering a bodge wire, always check with a multimeter.
Layouts and parts list from the Amiga PCB Explorer (amigapcb.org), used with the author's permission. amigapcb.org
