I know that there are several online sources of LGB service diagrams, but needing a particular set of parts sheets to aid reassembly of a digital Franki "S", I stumbled upon this link. Tom Larsen runs 'Only Trains' and is a gentleman to a tee, having dealt with him several times. He provides the service to all. The link certainly saved me a lot of head scratching as I had removed the stock #55020 Type ! decoders several years ago with the intent of fitting Massoth decoders and then like other interests in life my interest waned and I could not remember where all the loose connections went in both the loco and tender. I decided to reassemble the loco as analogue so as it may get some usage.
http://www.onlytrains.com/model/railroad/MAN.html
http://www.onlytrains.com/model/railroad/MAN.html