Xerox 4520 User Manual page 147

SIMMs and controller boards are sensitive to static electricity.
!
Before installing a SIMM, discharge static electricity from
your body by touching something metal, such as the metal
back plate on any device plugged into a grounded power
Caution
source. If you walk around before finishing the installation,
again discharge any static electricity.
Never remove the printer controller board while the printer is
plugged in.
C h a p t e r 5 : A d d i n g P r i n t e r O p t i o n s
I n s t a l l i n g a S I M M
5
With your fingers,
loosen the
thumbscrews.
Thumbscrews are not
removable.
5-7