IBM SY27-0345-06 - Manual (Page 56)

Figure 4-6. Non-ISDN System Board (12x Models)
Figure 4-7. ISDN System Board
5
Using a nut driver, remove the hex screws from the service port and from the
token-ring port, if present on this IBM 2210.
6
If you have an Ethernet port, remove both screws from the bracket on the
port, noting the position of the bracket as you remove it.
4-6 2210 Service and Maintenance