JBM 53474 Bedienungsanleitung Seite 8

7. If necessary, repeat the inspection by applying different vacuum according to the specified
requirements.
8. Turn off the engine, take off the timing light and the manual pump, connect the vacuum pipe
to the distributor.
INSPECTION OF THE ELECTRONIC IGNITION ADVANCE
The inspection of the electronic ignition advance control varies from vehicle to vehicle. Please refer
to the repair manual.
TROUBLE SHOOTING OF THE TIMING LAMP
If the timing light doesn't work or work abnormally, inspect the following items:
1. Make sure that the connection between the battery jar clip of the timing light and the battery
jar is reliable.
2. Make sure that the polarity connection between the battery jar clip of the timing light and the ba-
ttery jar is correct (the red clip should be connected to the anode"+", and the black clip should
be connected to the cathode"-").
3. Make sure that the surface of the up/down ferrite magnetic block in the inductive signal pickup
device is clean. If necessary, clean the ferrite magnetic block according to the section of the
timing light maintenance and points for attention.
4. Make sure that the inductive signal pickup device is correctly connected to the high voltage
wire of cylinder 1.
5. Make sure that the spark plug of cylinder 1 works normally.
6. Connect the inductive signal pickup device to the high voltage wire of the other cylinder 1,
press the flash frequency light, if the timing light flashes, check the spark plug of the cylinder 1,
and then conduct the following work.
NOTE: Anything wrong with the low ignition voltage of the spark plug and
the high voltage wire can result in the abnormal operation of the timing
light. Clamp the inductive signal pickup device at other places of the high
voltage wire to see if things will change. The electromagnetic wave pro-
duced by some ignition systems and special high voltage wires (solid wire
core high voltage wire, high voltage wire of racing vehicle, high voltage wire
of off road vehicle) is higher than EMI and RFI standards, thus the testing
equipment can not work normally. Contact relative manufacturers to learn
the correct test requirement.
POINTS FOR ATTENTION AND MAINTENANCE
Clean the inductive signal pickup device:
If the surface of the inductive signal pickup device is dirty or has oil
stain, the timing light may work abnormally. Clean the working surfa-
ce of the inductive signal pickup device at regular intervals. (see Fig).
FR
GUIDE D'UTILISATION
EXTÉRIEUR DE TOUS LES COMPOSANTS DU STRO-BOSCOPE
1. Écran numérique haute résolution (pour l'affi-
chage des paramètres de fonctionnement du
moteur, y compris pour l'affichage de la fré-
quence de rotation (des tours) et de l'angle
d'avance à l'allumage).
2. Bouton de commutation des temps (pour le
choix entre le moteur à deux temps et celui à
quatre temps).
3. Indicateur du temps (pour l'affichage du régi-
me de temps du moteur con-trôlé).
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