Derbi GP1 50 cc Workshop Manual page 121

FAULT 4
a) Interposing the AC tester between the black and yellow
cables on the regulator, check the generator output voltage
is within the prescribed values (this measurement must be
carried out with the battery detached). In the event of ano-
malies, replace the stator; otherwise proceed to point b).
b) Insert an ammeter between the stator (blue cable) and
the battery and check with the tester that the current output,
at 3,000 rpm and with the battery kept between 12 and 13V,
is as shown. If the values thus obtained are lower than pre-
scribed, proceed by replacing the regulator.
N.B.
BEFORE CARRYING OUT INSPECTIONS ON THE REGULA-
TOR AND ITS ELECTRICAL SYSTEMS, IT IS ALWAYS ADVI-
SABLE TO CHECK FOR CONTINUITY BETWEEN THE BLACK
CABLE AND GROUND.
N.B.
TO MAINTAIN THE BATTERY BETWEEN 12 AND 13V, RESUL-
TING IN CURRENT BEING ABSORBED FROM THE CIRCUIT,
IT IS POSSIBLE TO USE A 12V-35W LIGHT BULB LOCATED
BETWEEN BATTERY + AND GROUND.
Specific tooling
020331Y Digital multimeter
Characteristic
Voltage output at 300 rpm
25÷30V
Current output
1,5÷2V
FAULT 5
In the event that the turn signal lights are not operational,
proceed as follows:
- Remove the regulator connector and insert the tester termi-
nals between pin 5 and ground.
- Turn the ignition switch onto ON and check for battery vol-
tage. If no voltage is found, check wiring and terminals on
key-switch and battery.
120