1. Cleaning
The Bobbin Case and Rotary Hook: All Units Except CH 1
Remove the bobbin and bobbin case and clean all parts. Use a small brush to
clear away any threads, or use a small can of compressed air to blow away dust
or debris. A small vacuum may be used instead of compressed air.
Figure 1-12
NOTE: If your machine is equipped with under thread control (UTC) it is not
necessary to remove the UTC sensor for cleaning.
Figure 1-13
