didnt you say you have biceps tendonitis?
If so, ditch the chins and lat pull downs for sure, unless you were talking biceps femoris tendonitis in which case ditch the squats and deads till its better.
Assuming its your arm, which part of the biceps tendon is it? At the distal (where it inserts onto the radius) or at the proximal end (either coracoid process or supraglenoid tubercle)?