DC bus. Diode CR15 prevents the generation of spikes by inductive action of relay K1.
Filter assembly TB2. L2A and L2B is a filter assembly. It attenuates radio
frequency signals which may appear on the +27.5-volt and/or panel lamp power input lines,
and prevents them from degrading the performance of the equipment.
You have just completed Lesson 1, Identify and Describe the Function of the Major
Components and Theory of Operation of the C-6533. If you had problems with this lesson,
retake the lesson and then do the practice exercises for this lesson before continuing.