Question regarding added wire from Terminal PT 4 to 14U (for an upgraded Crack)

[Jimb0]

Hi. I am currently fixing an upgraded Crack (original version, not 1.1) for someone. There's a wire that was added that is going from terminal 4 of the power transformer to terminal 14U. Can you explain why this wire was added? Was this for one of the upgrades? He has a choke mod, cree diodes, and upgraded caps.

In the picture I desoldered most of the parts so you won't see the upgrades there and a lot of the other wiring. This was the one wire that was added that wasn't part of original Crack wiring so just wanted to know the reason why it's there.

[Paul Birkeland]

That wire grounds the heater winding of the power transformer.  You can terminate it there, or at the ground lug by the IEC power entry module.

If I had that Crack on my bench for repair, I would start by properly mounting the power transformer!

[Jimb0]

Thanks PB. I'm currently desoldering all the parts, that's why the power transformer are not screwed in place. He had the choke mounted on those screws but I had to remove it in order to desolder the other parts underneath.