Acer Chromebook 311 Lifecycle Extension Manual page 19

8. Flip over the USB board and remove the adhesive rubber (M) from the USB board
(Figure 1-22).
Figure 1-22. Adhesive Rubber Removal
NOTE: NOTE:
The adhesive rubber is a separate service part and must be removed and
re-installed when replacing the USB board.
CAUTION:
!
The 30-pin and 40-pin USB board FFC (Flexible Flat Cable) can be damaged if
removed while the mainboard connector and USB board connector are
locked.
Disassembly Procedures
M
1-17