Sym Joyride125 Service Manual page 177

17.ELECTRICAL SYSTEM
Inspection on Charging Voltage
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
a voltmeter having an indication that the
current flows from the positive or the negative
direction and the measurement should be at
zero, ammeter at 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 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.
17-6
Connect a tachometer.
Turn on the headlamp to high beam and start
the engine.
Accelerate the engine to the specified revolution
per minute and measure the charging voltage.
Specified Charging Current:
Control Charging Voltage:
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.
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To this chapter contents
1.2 A / 2000 rpm
15.0 + 0.5 V / 2000 rpm