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6P2-2 CS-144 GENERATOR
nally, the regulator uses internal regulator voltage for
control.
;
Both the “L” and “I” terminals serve to turn on the
regulator and allow field current to flow when the switch
is closed. The “I” terminal may be connected either
directly to the switch, or through a resistor. The “I”
Circuit may be used with or without the “L” circuit; that
is, with or without anything connected to the “L” termi
nal. When used, the “L” terminal must be connected
through an external resistor, such as the charging sys
tem indicator lamp. When a generator fault is detected
(voltage too high or too low, or no rotation), the “L”
terminal circuit is grounded by the regulator to turn on
the indicator lamp.
Figure 2—Generator Schematic
DIAGNOSIS
GENERATOR OUTPUT TEST
1. Put the generator in a test stand and make con
nections as shown in figure 3, except leave the
carbon pile disconnected. The ground polarity of
the generator and battery must be the same. The
battery must be fully charged. Use a 30 to 500
ohm resistor between the battery and the “L" termi
nal.
2. Slowly Increase the generator speed and observe
the voltage.
;
3. If the voltage is uncontrolled and increases above
16 volts, the rotor field is shorted or grounded, or
the regulator is bad, or (Doth. A shorted or ground
ed rotor field coil can cause problems in the regula
tor.
4. If the voltage is below 16 volts, increase speed and
adjust the carbon pile to obtain maximum amper
age output. Maintain voltage above 13 volts.
5. If the output is within 15 amperes of the rated out
put, the generator is good.
6. If the output is not within 15 amperes of the rated
output, repair the generator.
Summary of Contents for C Series 1993
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