It's not possible to find course schedules on Blackboard. However, if you have a Blackboard account with a class that you are currently enrolled in, you will be able to find course schedules on the syllabus that your professor provides for the class.
Once logged into Blackboard, scroll to the section entitled My Courses. Underneath the label Courses Where You Are A Student, there are links to your classes. Click the link of the class that you need the course schedule for. Once on the individual course's board within Blackboard, you should be able to find the Syllabus tab underneath the heading Essentials. The syllabus should include a detailed schedule for the semester.