check voltages on cn5303. If 5V is low(2,5...3v)remove connector and check if 5v ok.Feed 5v with external source and plug unit in 220 outlet.
If "loading" disappears after 1 min,regulator MM1665A
is defective.Replace C5206 with 1000uF/25V,C5306 with 100uF/25V,isolate anode of D5213 from transformer,wire one and an half turn around tranfo,
connect one end to ground and the other to anode of
D5213,remove MM1665A and replace with 7805 on appropriated radiator
Libre rené (rene.libre@skynet.be), October 2008