Sym Jet 50 Service Manual page 142

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
JET 50/100 series
Connect a tachometer.
Do not disconnect the headlight harness
connector after engine started.
Turn the headlight ON and to high beam
position.
Measure the voltage between the blue wire (+)
and green wire (-) while the headlight harness is
still in connection. Measure alternating current
voltage with a voltmeter.
Gradually increase engine speed and read the
voltage in each specified rpm.
Control voltage: 12.0~14.0 V / 5000 rpm
Resistance Measurement of Resistor at 20¢ J .
Resistor (10.2£ [ 5W) Green/Black and Body
ground: 9.0£ [ ~10.0£ [
Resistor (5.9£ [ 5W) Pink and Body ground:
5.6£ [ ~6.2£ [
JET EURO 50/100 series
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.
Resistance Measurement of Resistor at 20¢ J .
Resistor (8£ [ 5W) Green/Black and Yellow:
7.0£ [ ~9.0£ [
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.
-
-
-
-
(3) The charging current is normal, but the
voltage is not.
-
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 connector
Resistor
15-7