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)
55.
b.
Check resistance between P7-17L and P7-19R (see FO-6 sheet
transformer T4 (paragraph 4-57).
c.
Check resistance between P7-18R and P7-19L. If resistance is
more than 1 ohm, replace current transformer T3.
d.
Check resistance between P7-20R and P7-18L. If resistance is
more than 1 ohm, replace current transformer T2.
e.
After replacing any transformer, perform operational check.
f.
If all resistance checks were less than 1 ohm, do step 8.
Step 8.
Check for continuity between the following points:
Check continuity
If no continuity,
From
To
replace wire no.
1S9-A1-3
X3OB20
J7-17R
J7-18L
1S9-A1-2
X28B20
1S9-A1-1
J7-18R
X26B20
J7-19L
1S9-A2-6
X29B20
J7-19R
1S9-A2-5
X27B20
J7-20L
1S9-A2-4
X25B20
If no continuity, replace indicated wire and perform operational
check.
AC UNDER VOLTAGE INDICATOR DOES NOT LIGHT FOLLOWING AN AC OVER CURRENT FAULT.
56.
Step 1.
Note AC POWER ON indicator.
If off, set AC POWER switch off.
a. Push PRESS TO TEST switch. Replace bulb if had. If bulb is
good, do step 2.
b. If AC POWER ON indicator is on, set AC POWER switch off and
do step 4.
