TP-6953 7/19194 Section 11 Alternator Component Testing and Adjustment
11.4 FRX Activator Board Test
Accidental starting.
Can cause severe injury or death.
Disconnect the battery cables before
working on the generator set.
Remove the negative (- ) lead first
when disconnecting the battery.
Reconnect the negative (- ) lead last
when reconnecting the battery.
WARNING
Disabling the generator set. Accidental starting can
cause severe injury or death. Before working on the
generator set or equipment connected to the set, disable the
generator set as follows: (1) Press the generator set off/reset
button to shut down the generator set. (2) Disconnect the
power to the battery charger, if equipped. (3) Remove the
battery cables, negative (- ) lead first. Reconnect the negative
(- ) lead last when reconnecting the battery. Follow these
precautions to prevent the starting of the generator set by the
remote start/stop switch.
The FRX activator board is mounted on the exciter
armature and controls current flow to the alternator field.
SeeFigure11-6.
GC70113B-
1. FRX activator board
1
Figure 11 -6 FRX Activator Board
The following test determines if the FRX activator board
is non-functional.
See Section 11.2, Alternator Troubleshooting. Examine
the photo transistor board for visible signs of damage
(open foil patterns and heat discoloration) before
testing.
To test the FRX activator board, the following
components are needed:
D One 120-volt/110-watt light bulb with socket
D Switch, DPST (double-pole/single-throw) 120 volt
10 amp minimum)
D Fuse, 1 amp (in holder)
D 120voltACplugwithcord
D Five 6 mm screws and terminal nuts
D Flashlight
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