Apple ColorLaserWriter 12/600PS - Manual (Page 172)

3 Grasp the metal frame of the controller board and slide it out of the printer.
Place the board next to the printer. (When you put on the grounding wrist
strap, you want to be able to reach the controller board easily.)
IMPORTANT Put on a grounding wrist strap before handling the SIMM or any
internal printer parts. The strap grounds you to the printer, preventing any
static discharge that might harm the board or printer. Wearing the strap
cannot harm you. If you haven’t got a grounding wrist strap, you can purchase
one from a computer dealer.
4 Wrap the end of the grounding strap that does not have copper foil on it around your
wrist.
The strap’s light adhesive coating keeps it attached to your wrist, while
allowing for easy removal.
5 Remove the backing from the piece of copper foil at the other end of the strap.
6 Attach the copper-foil end of the strap to the metal surface on the inside of the printer by
pressing the adhesive backing against the metal.
Metal surface
Copper-foil end
WARNING Avoid touching the surface of the printer’s controller board
with hands or tools to avoid damaging or scratching the printed circuits.
147 Installing Options