HE3D printer stuff

My power supply burned up today on my K280. I opened it up and seams to be just one component. I’d like to try and salvage it but the component is unrecognizable. It’s labeled RT1 on the board. Could anyone here provide me with a picture of there’s or identify it.

I have an he3d 600 printer, bought about 2 years ago. It's using repetier host. The printer has two extruders. I have a problem where I can get one extruder to heat up, but the other one doesn't, and neither does the heated bed. The extruder that does heat up will not stop heating and will continue till it reaches up to about 300 C. The repetier host software is showing the temperature readings correctly, but the extruder just continues to heat. I don't believe the other extruder or the heated bed have ever worked for me, but the overheating extruder is a new issue. Any suggestions?

I am sure this is gonna help someone.

To calibrate with Repetier-host
https://makersteve.com/2018/09/02/ultimate-guide-to-calibrating-the-he3d-k200-or-k280-with-repetier-host-it-can-be-done/

To calibrate with Octoprint
https://makersteve.com/2018/08/12/calibrating-the-he3d-k200-or-k280-with-octoprint-it-can-be-done/

To get started with Octoprint
https://makersteve.com/octoprint/

UPDATED...

THIS IS THE SPREADSHEET HE3D SHOULD HAVE MADE AVAILABLE FOR DOWNLOAD TO CALIBRATE IT’S DELTA PRINTERS.

Since most Delta Printers are made with common parts, this spreadsheet will probably work on others.

In the coming days I will post a walk-through for calibrating your Delta using Repetier-Host and Octoprint. I will also cover calibrating your Dual Extruder for your HE3D Delta Printer on makersteve.com

Just figured it's worth sharing here.

Steve

Does anyone have a printable design of the K200's carriage plate? The one that the strut assembly bolts to? I broke the corner off of one of mine during assembly