Issue with LBO-501 Oscilloscope

Edgard P.

Joined Jan 29, 2023
1
Greetings to all. In 1990 I had a similar problem with my LBO-501. At the time it was found that the transformer presented short in the primary winding. A friend redid the windings. Today, after 32 years (that's right...) I decided to reinstal the transformer but I have a problem, among all the wires there are 3 that there are no connectios (ohm values to infinity) and I cant find the 3 ct wires (between the secondary windings 7 and 8, 9 and 10, 4 and 6. Could someone help me?
 
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