DAB+ Portable Radio Panasonic RF-10DEB - the only DAB Receiver with published Service-Manual/Schematic ?

[tiefbassuebertr]

This brand don't use DAB modules from foreign manufacturers like Frontier Silicon etc. In use are obviously an own chip set.
On various German forum platforms this model is judged to be good in terms of reception characteristics.
From what other manufacturer of DAB/DAB+ stuff are such service manuals published ?
Thanks for an advice.