The first thing to go on the dx was the backup battery. A this was soldered in to the board it was replaced with a battery holder. This board had to come out on order to get a good clean connection.
So when the mains transformer stopped working 3 months later I was pretty disappointed. I found a suitable transformer at RS. This was soldered onto bread board with the connecting wires. (Probably not a text book way to do this!). This was then screwed into the existing mounting holes.
This pic shows the initial test. And then fully mounted. Now with everything working I was getting back into FM big time. I stumbled upon a software update from a guy on ebay which also gave you 4 banks of onboard RAM. This involved soldering some wires to the legs of in place ic’s.