Aaron oscilloscope

[manticore]

HeyHo!
A friend of mine here in Tanzania has an Aaron oscilloscope (BS 310S) which has died. I can't find out anything about this machine on Internet - A HAM radio operator in Denmark appears to be the only source of information but my Danish is non-existant.
If anybody has access to a service manual or circuit diagram (schematic) or any other information, could they please let me know.