TM 55-1730-229-12
AC 320A0-OMM-000
TO 35C2-3-473-1
TM 1730-12/1
Table 4-2.
Organizational Troubleshooting (continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
(continued)
57.
Step 5.
Test current transformer T1 as follows:
a. Refer to figure 4-38. Tag and disconnect Wires from
terminals T1 (45), T2 (46), and T3 (47).
b. Check resistance between terminal N (44) and each of the
other terminals (T1, T2, and T3). If resistance between N
and any other terminal is greater than 1 ohm, replace
transformer (paragraph 4-55).
c. Check for continuity between terminals T1 and T2, T2 and T3,
and T1 and T3. If no continuity, replace transformer.
d. If transformer is replaced, perform operational check.
e. If checks in steps b and c were good, do step 6.
Disconnect main harness connector P12 from GCU. Check for continuity
Step 6.
between the following points (see FO-6 sheet 1):
If no continuity,
Check continuity
replace wire no.
To
From
X13A20
T1-N
P12-G
X12A20
P12-L
T1-T3
X11A20
T1-T2
P12-K
X10A20
T1-T1
P12-J
a. If no continuity, replace indicated wire.
b. If all continuity checks good, replace GCU (paragraph 4-54).
c. Perform operational check.
AC OVER VOLTAGE INDICATOR DOES NOT LIGHT WHEN AC VOLTS METER READS MORE THAN
58.
118 VOLTS.
Step 1.
Note AC POWER ON indicator and set AC POWER switch off.
If AC POWER ON indicator was off (before AC POWER switch was set
to off) do step 2. If not, go to step 4.
