Before checking step 2c, move the handset from jack J803 to jack J802 on the commander's C-2298;
then set the commander's C-2298 MONITOR switch to INT ONLY. (See Figure 26.)
Figure 26. Handset connected to C-2298 RAD jack J802.
If step 2 checks good, step 3 would be checked.
When the installation has crew member box(es) C-2298, one at a time, check each crew member's
intercom according to EPC step 3.
a. First, move the handset from the commander's C-2298 to jack J803 of the crew member's C-
2298 being checked.
b. Then, turn the crew member's box C-2298 VOLUME control fully clockwise (maximum).