Sym RS-50 Service Manual page 140

Caution
To replace the old battery, use a new battery
with the same current and voltage.
The following problems are related to the charging
system, follow the instructions provided in the
checking list to correct it if any one of the problems
takes place.
(1) The charging voltage can not exceed the
voltage between two battery terminals and
the charging current is in the discharging
direction.
(2) The charging voltage and current are too
much higher than the standard values.
Headlight Voltage Inspection
Turn the headlight ON and to high beam position.
Measure the voltage between the blue wire (+)
and green/white wire (-) while the headlight
harness is still in connection. Measure direct
current voltage with a voltmeter.
Voltage: under 12.3V
Auto by-starter resistor inspection
Resistance Measurement of Resistor at 20℃.
Resistor (8Ω 5W) between Green/Black and
Pink: 7.0Ω ~9.0Ω
This chapter Contents
The following problems are not related to the
charging system; correct it if any by following
steps indicate in the checking list.
(1) The standard charging voltage and current
can only reach when the revolution of the
engine exceeds the specified rpm.
-
-
(2) The charging voltage is normal, but the
current is not.
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-
-
-
(3) The charging current is normal, but the
voltage is not.
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Front cover
15. ELECTRICAL EQUIPMENT
Bulbs used exceed their rate and
consume too much power.
The replacement battery is aged and
does not have enough capacity.
The replacement battery is aged and
does not have enough capacity.
Battery used do not have enough
electricity or is over charged.
The fuse of the ammeter is blown.
The ammeter is improperly connected.
The fuse of the voltmeter is blown.
Headlight coupler
Resistor
15-7