I see no potentiometer near L1 but there is near L2 and L3.. This looks as if it should be adjusted to get sync equaly on positive and negative transitions.
There is a 320 ohm resistor in the picture. This may be wire wound and used as an inductor.
L2 and L3 are labelled 'rot' which may be 'select on test', Harald may be able to interpret.
There is a 320 ohm resistor in the picture. This may be wire wound and used as an inductor.
L2 and L3 are labelled 'rot' which may be 'select on test', Harald may be able to interpret.