HP Compaq StorageWorks TL881 DLT Mini-Library - Manual (Page 135)

Regular Maintenance 5-5
2. Using the key provided (if necessary), Unlock the Magazine Security
Lock on the front panel.
3. Press the Unlock/Open Button on the front panel.
4. Remove the magazine from the Base Module.
5. Remove the cleaning cartridge from the magazine.
6. Insert any desired data cartridge into the slot vacated by the cleaning
cartridge.
7. Press the Unlock/Open Button on the front panel.
8. Insert the magazine into the Base Module.
9. Using the key provided, lock the Magazine Security Lock on the front
panel (optional)