Sym RS-50 Service Manual page 139

15. ELECTRICAL EQUIPMENT
Current Leakage Inspection
Turn the main switch to OFF position, and remove
the negative cable terminal (-) from the battery.
Connect an ammeter between the negative cable
terminal and the battery negative terminal.
Caution
In the current leakage test, set the current
range at larger scale, then gradually
decrease to the lower scale as the test
process goes to avoid possible damage to
the ammeter and the fuse.
Do not turn the main switch to ON position
during test.
If the leaked current exceeds the specified value, it
may indicate a short circuit.
Allowable current leakage: Less than 1 mA
Disconnect each cable one by one and take
measurement of the current of each cable to
locate the short circuit.
Charging Voltage Inspection
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.
15-6
This chapter Contents
Ground circuit
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.
Connect a tachometer.
Turn on the headlight to high beam and start the
engine.
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
Ammeter
Battery (-) terminal
Digital voltmeter
Ammeter
Fuse coupler