DEC 4000 600 series Owner's Manual page 129

Operating the TZ30 Tape Drive
Write Protect light (orange)
Tape in Use light (yellow)
Operate Lever light (green)
Unload button
Drive lever
CompacTape slot
CompacTape cartridge
Caution
Do not push a tape cartridge into the TZ30 while moving
the cartridge lever between the lock and unlock positions.
Doing so can damage the drive.
Operating Mass Storage Devices 5–31