These are hard links to the datasheets
PlayList (incomplete at time of writing)
https://www.youtube.com/playlist?list=PLGuJySJ3giZf-cSHU4QRpOkUkSAR6Jh5F
ES necro-Thread
https://endless-sphere.com/sphere/threads/sorensen-dcs-series-modification-and-repair-thread.95184/page-6#post-1814269
ORIGINAL – including component values
UPDATED – including later year models
M15 Option
Sufficient detail provided in attached links. TL;DR the main fuse is blown as a 10W resistor is cooked.
-Schindler