There was no introduction and preaching schedule for this part of the book.
1. Isaiah 1:1-9 Judgement and Mercy of God (Jeremy Jackson) 7-3-83
2. Isaiah 1:10-31 (Rick Erickson) 7-10-83
3. Isaiah 2 God's Judgement makes Mercy Appealing (Doug Weeks) 7-17-83
4. Isaiah 3-4 Branch, Cleansing, and Canopy (Jeremy Jackson) 7-24-83
5. Isaiah 5 (Bill Finch) 7-31-83
6. Isaiah 6 The Keys to Spiritual Keenness (Doug Weeks) 8-7-83
7. Isaiah 7 Trying God's Patience (Ed Van Cott) 8-14-83
8. Isaiah 8:1-9:7 Rejection of Isaiah's Counsel (Al Gurley) 8-21-83
9. Isaiah 9:8-10:34 (Rick Erickson) 8-28-83
10. Isaiah 11-12 Exalting the Root of Jesse (Jeremy Jackson) 9-11-83
The Gospel Coalition site has sermons to fill in the gaps, for example you could listen to Robert Rayburn's sermon on 1:10-20 and Raymond Ortlund's sermon on 1:21-31 and the two sermons on 9:8-10:34 by Raymond Ortlund. Once the 2013 series covering this section (see below) is complete, those passages will have been covered.
Al Gurley preached on Isaiah 9:1-7 in 1980. See the topical sermons here.
Stefan Matzal preached a sermon on Isaiah 9 in 2009. See the topical sermons here.
See also the 2013 sermons covering this portion of the book.
For more sermons, see here.