Answer for frame 9: Point D (the midpoint of the brackets)
10. When troubleshooting a linear signal flow path, check at or just before
the midpoint of the trouble brackets. If the check is good, move the first
(left) bracket to that point and repeat the process. If the check is bad,
move the last (right) bracket to that point and repeat the process. In
either case, the trouble area is being narrowed down by halt after each
check. (This is called the "halfsplit" principle.)
Figure 14 shows a linear signal flow path with initial brackets
established. Assume that the first check shows normal at that point. Which
bracket would be moved to that point, and where would the next check be
Move the (first / second) bracket to the midpoint. The next check would be
made at point .
Answer for frame 10: Move the first bracket to point E and make the next
check at point G.
11. Figure 15, below, shows a basic CONVERGENT type of signal flow path. A
convergent signal path exists when there is more than one inpu to a stage
(block). Some types of convergent stages require all the inputs before
there is an output, while other types require only one input to produce an
output. If there is no output from a convergent stage, each or every input
must be checked.