IBM TS3100 Setup, Operator, And Service Manual page 276

Card, and power supply removed from the replacement library enclosure) and
return it, along with the Warranty Redemption Card, to IBM.
Important: Failure to return all of these components to IBM will result in
you being charged for any missing components.
10-30
TS3100 Tape Library and TS3200 Tape Library Setup, Operator, and Service Guide