PIAGGIO Liberty 50 Catalyzed, Руководство по ремонту

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The regulator is earthed through the electrical system, so the regulator body does not earth the circuits
inside the regulator.
There must be insulation between each regulator terminal and the regulator body (use the tester to
check electric resistance).
1) BURNING OUT OF BULBS
The regulator must be replaced, as it is certainly
faulty.
2) LIGHTS AND STARTING DEVICE FAILURE
Expose the voltage regulator by removing the
plastic cover from the front shield, start the engine
and let it idle. Keep all vehicle lights out.
Fit the positive prod of the multimeter (set for
measuring alternating voltages) to terminal no. 1
(grey wire) and the negative prod to terminal no. 2
(black wire). Check if voltage is present (see fig-
ure).
If there is no voltage, fit the negative prod directly
on earth; if voltage is measured, check the regu-
lator's earth cables; otherwise replace the regula-
tor because it is certainly broken.
Finally, you may measure the voltage supplied by
the stator:
- Disconnect the regulator connector, fit a multi-
meter between the grey-blue cable (4) and the
earth to measure alternate voltages (see figure).
- Voltage delivered at 2000 revs/min shoud be
about 25 - 35V.
If also in this case no values are obtained, replace
the regulator because it is damaged.
N.B.
TO MEASURE THE ABOVE VOLTAGE USE AN ANALOGUE
TESTER THAT CAN MEASURE ALTERNATING VOLTAG-
ES AND KEEP THE ENGINE AT IDLE TO HAVE AN ALTER-
NATING VOLTAGE OF A FREQUENCY AS CLOSE AS
POSSIBLE TO 50HZ SO AS TO DETECT THE EFFICIENT
VOLTAGE VALUE SUPPLIED BY THE REGULATOR
(ABOUT 12V).
Liberty 50 Catalyzed
Electrical system
ELE SYS - 49