b. Crew member's talk circuit. The crew member's voice signal starts
at the crew member's handset microphone (Figure 11), then through the
handset cable to pin D of J803. When the C-2298 MONITOR switch is in the
ALL, A, INT ONLY, or B position, the signal passes to pin K of J803 and
J804. From pin K of J801 or J804, the signal passes through the CX-4723 to
pin K of J505 or J506, or J507, depending on the jack the crew member's C-
2298 is cabled to; then, into the AM-3780 through contacts 13 and 14 of K502
to the A250. (Trace this circuit on your system diagram.)
Crew member's C-2298 will not provide intercom voice circuit when
the MONITOR switch is set to C position.
Crew voice signal MONITOR switch set to
ALL, A, INT ONLY, or B.