Xerox 4520 User Manual page 151

Use only finger pressure to tighten the thumbscrews. Do not
!
use a screwdriver because the threads will be stripped if
excessive torque is applied. The screwdriver slot in the
thumbscrew is only there to start the disengagement of the
Caution
controller board after an extended period of time when
fingers may not be able to disengage it.
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
12
Slide the printer
controller board back
into the printer.
5-11