TM-268 819 Page 18
Belt Driven Generator
8-6.
Control Board PC2 Testing Information
803 236 / 207 883-D
Be sure plugs are secure before
testing. See Section 8-5 for specific
values during testing.
1
Power Board PC2
2
Receptacle RC1
Test Equipment Needed:
2
1
8-7.
Control Board PC2 Test Point Values
PC2 Voltage Readings
a) Tolerance −
±
10% unless specified
b) Condition − no load; generator run-
ning at 3000 (50 Hz) or 3600 rpm (60
Hz)
c) Reference − to circuit common
(RC1-5) unless noted
Receptacle
Pin
Value
RC1
1
Voltage Feedback: 240 volts AC with respect to RC1-2
2
Voltage Feedback: 240 volts AC with respect to RC1-1
3
Pulse Width Modulation (PWM) Signal: +1.5 volts at no load; voltage increases with generator load to
approximately 4.3 volts DC at maximum.
4
Shutdown Signal: 0 volts DC during normal operation. If 12 volts DC is present, check rotor and if
rotor checks ok, replace control board PC1.
5
Circuit common
6
Revolving field (rotor): +25 volts DC at no load with respect to power board PC1 RC31-4; +75 volts
DC at full load with respect to power board PC1 RC31-4
7
+ 12 volts DC
8
Enable Line: +12 volts DC when generator is enabled (On); 0 volts DC when generator is not enabled
(Off)
9
Revolving field (rotor): +25 volts DC at no load with respect to power board PC1 RC31-4; +75 volts
DC at full load with respect to power board PC1 RC31-4
