Hello, 

My name is Marcus, and I live in Brazil. Sorry my english, but I will try to be as clear as possible. 

I have a Ultra Hamonizer H3000 SE and he is presenting a problem. When I call him my guitar sound is clean, without the effects and when I press the button to activate a chosen effect, continues to have the clean sound without effect. 

According to information from a technician in my town, he said it is an issue of CI. 

Please help me. 

Thank you.