Sym Jet Sport X S50 Service Manual page 162

Charging Voltage Inspection
Digital voltmeter
Fuse connector
Caution
Before conducting the inspection, be sure
that the battery is fully charged. If
undercharged, the current changes
dramatically.
Use a fully charged battery having a voltage
larger than 13.0 V
While starting the engine, the starter motor
draws large amount of current from the
battery.
After the engine is warmed up, replace original
battery with a fully charged battery. Connect a
digital voltmeter to the battery terminals.
Connect an ammeter between both ends of the
main fuse.
Caution
When the probe is reversibly connected, use an
ammeter having an indication that shows both
positive and negative direction current. The
measurement would be at zero, if the ammeter
is one direction only.
Caution
Do not use short-circuit cable.
It is possible to measure the current by
connecting an ammeter between the battery
positive terminal and the + cable position
terminal, however, while the starter motor is
activated, the surge current of the motor
draws from the battery may damage the
ammeter. Use the kick-starter to start the
engine.
The main switch shall be turned to OFF
position during the process of inspection.
Never tamper with the ammeter and the
cable while there is current flowing through. It
may damage the ammeter.
This chapter Contents
Connect a tachometer.
Turn on the headlight to high beam and start the
engine.
Ammeter
Accelerate the engine to the specified revolution
per minute and measure the charging voltage.
Specified Charging Current: 1.2 A / 5000 rpm
Control Charging Voltage: 14.0~15.0 V / 5000
rpm
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 cannot exceed the
(2) The charging voltage and current are too
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
(2) The charging voltage is normal, but the
(3) The charging current is normal, but the
15. Electrical Equipment
Caution
To replace the old battery, use a new battery
with the same current and voltage.
voltage between two battery terminals and
the charging current is in the discharging
direction.
much higher than the standard values.
can only reach when the revolution of the
engine exceeds the specified rpm.
- Bulbs used exceed their rate and
consume too much power.
- The replacement battery is aged and does
not have enough capacity.
current is not.
- The replacement battery is aged and does
not have enough capacity.
- Battery used does not have enough
electricity or is over charged.
- The fuse of the ammeter is blown.
- The ammeter is improperly connected.
voltage is not.
- The fuse of the voltmeter is blown.
15-5