Figure 25. Handset connected to commander's C-2298 intercom jack J803.
b. EPC step 2.
(1) Do the following to check step 2a:
If, when step 2a is checked, relays inside the AM-1780 click, step 2a is good and step 2b would be
(2) Step 2b checks the commander's intercom talk/listen circuit operation.
Sidetone loudness depends on the commander's control box VOLUME control setting.
Check first at full volume; then adjust the VOLUME control to a comfortable listening level.
If step 2b checks good, step 2c would be checked.