Apple Mac 5260/100 - Manual (Page 137)

Take Apart Analog Board - 63
2 Lift up the lower back
corner of the analog
board to disengage the
rear bracket from the
chassis slot.
3 Slide the analog board
back to clear the
interlocking tab and lift
it from the guide rail.
Important:
At this point,
you may need to
disconnect the
microphone cable to be
able to slide the analog
board completely out.