speed control pcb for Clarke CL300 lathe

[jacek nowakParticipant @jaceknowak11831]

Hello, I would like to ask for help.
I have the FC250J / 230V model
I have the module itself where it was shorted until I had to repair the paths. I replaced the 12v zener diode, capacitors c9,13,14.
After starting and changing the switch (left-right rotation), the motor output is + 110V or -110V (measured by the meter). However, when I turn the potentiometer, the voltage does not change. Should it be like that?
I don't know if my google translator will translate it well
Greetings to all.

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