Sym EuroMX 125 Service Manual page 176

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 foot lever 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.
Connect a tachometer.
Turn on the headlamp to high beam and start
the engine.
Accelerate the engine gradually to the specified
revolution per minute and measure the charging
voltage/current.
Charging Current: 4.8A/1600 rpm
Control Charging Voltage:
14.0±0.5 V / 2000 rpm
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.
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.
- Bulbs used exceed their rate and
consume too much power.
- The replacement battery is aged and
does not have enough capacity.
(2) The charging voltage is normal, but the
current is not.
- 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.
(3) The charging current is normal, but the
voltage is not.
- The fuse of the voltmeter is blown.
This Chapter Contents
16. Electrical Equipment
Main switch
16-7