Sidetone loudness depends on the control box C-2298 VOLUME control setting. Check first
at full volume; then adjust the volume control to a comfortable listening level.
c. EPC step 3. This step checks the crew member's C-2298 control box function.
(1) To check step 3a, do the following:
(2) If step 3a checks good, do step 3b as follows:
(3) If step 3b checks good, step 3c would be checked as follows:
Move the handset to the RAD jack (J802) on the C-2298 being checked, and turn the C-2298
MONITOR switch to INT ONLY; then do step 3c as follows.
If step 3 checks good, check EPC step 4.