A Brisbane man with a fetish for boys' school uniforms faces time in jail after breaching a court order to stay away from private schools.

Errol Lee Guy, 44, was remanded in custody after he admitted to police in August he had been walking past Brisbane Boys Grammar School at night.

He also admitted he had posted a flyer at a train station within 200 metres of a private girls' school in Brisbane's west and had passed a note to a schoolboy while travelling on a crowded bus.

The note was intercepted by a concerned member of the public.

His admissions were in breach of an intensive corrections order he was placed on by Brisbane District Court judge in October last year.