[dropcap]O[/dropcap]kay time for an update. I recieved the modern power supply test board about a week or two ago. Soldered everything in and it is working with a 24V 1.5 A DC wall plugin. So that is a big step for the modern version of the XF551. I am currently about ready to send the alternate osc circuit and the LED test boards to Itead for manufacture. In about two weeks or so when they come in I can test them and if they pass, that’ll be the final phase before sending the complete modern XF551 board in.
Not so good for the original power supply test board. I got the test board in yesterday and finished soldering the parts in tonight. It didn’t blow or let out black smoke but there is no voltage at the drive connector. I know the Atari transformer is working because I can power a 1050 with it. So either I wired the DPDT switch wrong or something else in the wiring is wrong. So it’s back to the schematics to see if I can rewire the test board to see if I can get it to work.
***Edit****
Yipee! It was in the schematic. Had the switch wired wrong. Cut the wrong trace and wired it right. Success!!! Now both the modern and original power supplies are working.