Service Manual for Certomat HK

Hey, we have two Certomat HK Hoods from "B. Braun Melsungen AG" for the Certomat R benchtop shakers. One of them does not heat and the other starts to smoke when connected to mains. They look rather old and the electronics are completely made up from through hole components. While it would be possible to repair them without the manual it would definitely be easier with it. Has somebody the

Equipment: Certomat HK Hood for Certomat Benchtop Shakers