6-8
Spec A Start - Field Flash Mode
Holding the Start/Stop switch (S1) in the Start position activates the following field flash circuit:
• Battery positive (B+) is supplied to the control assembly (A1) and the voltage regulator (VR1) at pin 7. From
pins 9 and 10 of the voltage regulator, excitation voltage is sensed through the brushes to the rotor field winding.
• The excitation voltage flashes the generator field winding to ensure that there is adequate magnetism to induce
generator voltage buildup.
ES2017-2s
BATTERY BT1
CONTROL ASSEMBLY A1
START/STOP SWITCH S1
VOLTAGE REGULATOR VR1
J4 CONNECTOR
P4 CONNECTOR
BRUSH BLOCK
FUSE F1
J1 CONNECTOR
P1 CONNECTOR
FIGURE 6-5. SPEC A START – FIELD FLASH MODE
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