ohms if the circuit is good. With the handset PTT switch released, the meter display should show
infinite () ohms if the circuit is good.
(3) Microphone element check. Connect one meter test lead to pin A and the other test lead
to pin D of the handset audio plug. While listening to the microphone element (hold to your ear), press
and release the PTT switch several times. A clicking sound should be heard from the microphone
element if it is good.
Figure 20. H-189/U(H-250/U) handset checks.
EQUIPMENT PERFORMANCE CHECK. Section II of GTA 11-3-49 is the equipment
performance checklist that will be used to verify if the installed AN/VIC-1(V) is operating correctly or
not. Portions of that EPC are shown in the following paragraphs.
a. EPC step 1. First, turn the vehicle MASTER power SWITCH to ON.
(1) Refer to Figure 21, since EPC step la checks the vehicle power.