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6-5 ELECTRICAL SYSTEM
When the engine speed increases and the load decreases, the battery charge voltage will increase due to the
voltage generated by the generator. The battery will continue to be charged by the generated voltage until
the battery voltage (voltage between
®
and
®)
reaches the value set of the control circuit in the regulator,
then a signal from the circuit will flow to the SCR. When the SCR goes "ON",©- @will become conduc-
tive, hence the voltage does not charge the battery but returns to the generator.
When the battery voltage falls, the signal to the SCR will be out off, causing the SCR to go "OFF". As a
result, the generated voltage will start to charge the battery once again. Due to the repetition of the above
operation of the regulator, the battery voltage will be maintained constant, preventing overcharging of the
battery.
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INSPECTION
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CHARGING OUTPUT CHECK
• Remove the left frame cover.
• Start the engine and keep it running at 5 000 r/min with the
lighting switch turned ON (High position).
• Using the pocket tester, measure the DC voltage between
the battery
EB
terminal and
8
terminal. If the tester reads
under 13.0V or over 15.5V, check the AC generator no-
load performance and regulator/rectifier.
NOTE:
When making this test, be sure that the battery is in fully-
charged condition.
STD charging output: 13.0- 15.5V (DC) at 5 000 r/min
09900-25002 : Pocket tester
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