Efka Variocontrol N153 DA82GA Help repair

[Romann]

I'm sorry for my English. Thread trimming does not work

[Romann]

Hello, I have to contact you, since there is no Efka service center in my country. Could you tell me which of these elements in the photo is responsible for thread trimming (FA). Below is a photo of the Efka DA82GA3312 control unit board Thank you very much, I hope for your help. With respect!

[chrisash]

I think you would need a circuit board diagram to understand what part does what, sometimes in the back of manuals

[SEWTRONIX]

If you know the thread trimmer does not work you can do a couple of things to find the component that is not working. 1. Use thermal imaging to see if one of those transistors is super hot or super cold (also can be used to see if another IC chip is bad) 2. Use a meter to compare with another working unit. I can say from just repairing an Adler 195 with a variocontrol that the common transistors with that one are (from left to right) 1,2,3,5,6,7, and 8.