Here is the Frigidaire 30″ & 40″ Electric Range Repair Manaul. Its covers the models starting with the serial#NF…
This repair manual also covers Tappan, White-Westinghouse, Gibson, Kelvinator and Sears Kenmore(model# starting with 790).
You can order the Repair Manual by clicking the link or the picture.
Frigidaire 30″ & 40″ Electric Range Repair Manaul
941989