Thanks for that Jry, I have now removed the DC-DC supply (in its enclosure with the battery charger PCB attached) as you suggested, and I have tested the output pins for shorts but nothing obvious there. I have tested the caps in situ all seems ok except for C1 which is on the input to the battery c...

Hi Guys I have IFR 1200S. I switched it on recently after it had been unused under the bench for about 8 years. It seemed to work OK at first switch on, but after about 1 minute it suddenly went dead as though it had been switched off. I figured that this was probably a mains fuse so I thought a qui...