Oscilloscope does not display the correct waveform RIM Rog 7A

[duke37]

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.

 

[bob808]

That is 820 ohm resistor. Look closely. That resistor is in series with L1 in the schematic. L2 and L3 are each in series with 4.7K resistor. And this is exactly as I found them on the board with the only problem being L1 that is composed of those 2 inductors connected to that variable resistor.

 

[duke37]

I presume that the high frequency response can be optimised by adjusting the amount of inductance.

 

[bob808]

I will try to test that while everything is working
Long wait for the mailman now
Thank you for your help!