How to Find the Table name on OAF Page

Step 1) Set the profile option "FND: Diagnostics" at User Level to "Yes"

set FND : Diagnostics

Step 2) Navigate to respective OAF page and Click "About this Page" link at the bottom as shown in below screenshot

Click About this Page

Step 3) Navigate to Page > View Object and click on this. You can see the table name from there.