4. What is meant by establishing brackets? Let's take a typical problem and
establish initial brackets. Figure 11 shows a block diagram of a
combination AM/FM radio and a phonograph. The AM and the phonograph work
perfectly, but when the FM is selected, only a quiet hum is heard from the
speaker. The first bracket would be placed on the block diagram at the
point where the first indication of an abnormal signal path exists. The
second bracket would be placed where the normal signal path exists so
that ALL the affected circuits (or components) are included within the
brackets.
Figure 11.
Remember, to establish initial brackets: find all the symptoms, locate
the abnormal signal paths, and then establish the brackets. On Figure 11,
establish the brackets for the trouble described above.
Previous Page
