Lenovo ThinkPad X220 Tablet Hardware Maintenance Manual page 94

Applying labels to the base cover:
The new base cover FRU is shipped with a kit containing labels of several kinds.
Note: If the Windows Authentication label (COA)
with the label attached to the customer, or provide a letter to the customer stating what the label was
originally on the system and what the label part number, serial number, and product key were.
When you replace the base cover, you need to apply the following labels:
19
Homologation label
20
Product label
The following labels need to be peeled off from the old base cover, and need to be put on the new base cover.
1
China telecom label
2
Windows Certificate of Authentication label (COA)
3
SIM label
4
BTY word label
5
Asset tag
6
IMEI label
7
Brazil WWAN label
8
Wireless card label (only for Brazil)
9
Modem AMOM label
10
MEDEM label (only for PRC model)
11
Bluetooth label
12
China WWAN label
13
SIRIM label or POSTEL label
14
Non-encryption label (for non-TPM model) or Rating label (only for Indonesia)
15
AT Wireless LAN MAC address label
16
Vodafone label
17
FCC label
18
Serial number label
21
FCC-ID label for contactless smart card model
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Hardware Maintenance Manual
2 is attached to a part that is replaced, return the old part