Suzuki EN125-2A Service Manual page 139

When the engine r/min becomes higher, the generated voltage of AC generator also becomes higher and
the voltage between points
adjusted voltage of control unit, control unit becomes "ON" condition consequently. On the "ON" condition
of control unit, signal will be sent to the SCR (Thyristor) gate probe and SCR will become"ON" condition.
Then the SCR becomes conductive to the direction from point
the current generated from the AC generator gets through SCR without charging the battery and returns to
AC generator again. At the end of this state, since the AC current generated from AC generator flows into
the point ,reverse current tends to flow to SCR ,then the circuit of SCR turns to OFF mode and begins to
B
charge the battery again. Thus these repetitions maintain charging voltage to the battery constant and
protect it from overcharging.
A.C. Generator
and of regulator becomes high according, and when it reaches the
A B
ELECTRICAL SYSTEM 6-6
to point .Namely at the state of this,
A C
A
SCR SCR SCR
C B
Ig. switch
Battery