T O 35C2-3-442-2
P-8-627-34
TM-07464A-35
TM 5-6115-457-34
6-118. 400 HERTZ ELECTRONIC
b. Removal. Refer to figure 6-22 and
COMPONENTS ASSEMBLY (A6) .
tag, then disconnect wiring to the permis-
sive paralleling relay. Remove the four
6-119. ON EQUIPMENT TEST.
screws securing the relay in position.
a. Symptom and Isolation of Malfunction.
6-116. BENCH TEST.
A malfunction of the electronic component
assembly (A6) usually is indicated by an un-
a. Connect the permissive paralleling
stable generator frequency or by loss of
relay to the test equipment as illustrated
frequency control. To isolate this malfunc-
in figure 6-30.
tion, refer to figure 1-16 and proceed as
follows :
WARNING
Exercise extreme care not to touch
exposed electrical connections when
working inside mode II relay box
with generator set operating.
NOTE
Remove cover from mode II relay
box to gain access to the test
points, see figures 6-15 and 6-22.
1. To check for cause of unstable
Figure 6-30. Permissive Paralleling
set to the R x 10,000 scale, to capacitor
C1. The meter should indicate 0 resistance
relay (K16) test set up
and slowly rise to infinite resistance. If
capacitor C1 does not meet the above re-
quirements, the capacitor is defective.
b. With switches S1 and S2 open, energize
variable voltage supply and adjust to 15 VAC.
Close switches S1 and S2. Indicator DS1
2. To check for lack of frequency
should energize and DS2 should de-energize.
control, measure the resistance of resisters
R4 and R5. The resistance should be 249
c. Decrease voltage of variable voltage
ohms 1 percent, if not, the resistors are
supply until indicator DS1 de-energizes. The
defective.
voltage should be 8 1 VAC.
b. Removal. Refer to figure 6-22 and
d. If the permissive paralleling relay does
tag, then disconnect wiring to the electronic
not meet the requirements of the above tests,
components assembly. Remove the three
replace the relay.
screw assemblies securing the assembly in
position.
e. Remove the permissive paralleling
relay from the test equipment.
6-120. BENCH TEST.
6-117. INSTALLATION. Refer to figure
6-22 and install the permissive paralleling
relay in the mode II relay box. Secure the
Using an ohmmeter test the elec-
relay in position with four screw assemblies,
tronic components assembly for values as
then refer to figure 1-17 and reconnect
noted in figure 6-31.
wiring. Replace mode II relay box cover.
Change 8
6-87
