James Perrett wrote:I know it is too late but fuses are generally specified at a certain value for a reason - NEVER replace one a higher rated fuse. I'd go along with Folderol's suggestion to fix what you have rather than rebuild. It sounds like a basic regulated supply which won't be hard to fix if you take a logical approach.
Yes but, I thought the transformer was toast? Might be hard to find one that fits.
James, you are right, of course. When I got the MS6 from recollection it had a 200mA fuse, but I have no idea if that was correct. It was the 200mA’s that were popping so I thought I would take a chance on the next one up. Is there any way to judge, from the circuit components, what the correct rating ought to be?
Dave, you are correct that replacement transformers (same dims and pin-outs) are supposed to be hard to find. Not sure if either/both are dead. I think this is why others have gone for inserting 12V AC before the diode rectifier.
I am wondering about bypassing (and not re-fitting) the AC voltage selector (which Folderol said may be damaged) and then testing the AC voltage on the transformer outputs / diode inputs. Logical next step? I also notice that the only connection to mains earth is to the casing, none to the PCB that I can see. There does appear to be connections for L / N / E on the PCB, but the Earth is not connected to anything.