1931: Broken LAN socket.
240 OHm 3W.

HV Capacitors instead 7uF*2 => 14uF 

Tested: 400VAC to 368VDC with load (3 heater serial).
5V analog input, enable.

3049: 240 OHm 3W, SCR-transformer, 
SCR BTW69-1200,SMD 6R2, SMD Diode 5D=> 4148