Lincoln 1600 Temp. display, Display Transformer, inoperative, Temp. Display, Thermocouple

Temp. display	Display Transformer	Measure the transformer primary for a nominal 120 VAC input,
inoperative		if voltage is not present, trace wiring back to the oven power
		source. Measure the secondary output, which will normally be
		12-15 VAC. Voltage across terminals 1 and 3 on the temp.
		display should read 12-15 VAC. Terminals 1-2 and 2-3 should
		be 1/2 the voltage reading to 1-3. If the above secondary
		readings are not achieved, replace transformer.
	Temp. Display	If proper voltage is present at terminals 1, 2, and 3 on
		temperature display, but the display is not lighted, recheck all
		connections for tightness. If temperature display is still not
		operating, replace the temperature display.
Temp. Display	Thermocouple	Connect the thermocouple of a pyrometer to the thermocouple
inaccurate, erratic or		on the temperature control board. (Be sure to maintain proper
inoperative		polarity of thermocouple leads--see Adjustment Section for
		proper procedure.) The pyrometer will indicate oven
		temperature. Measure DC millivolts of thermocouple at the
		temperature display. See thermocouple chart in adjustment
		section for proper readings. Replace thermocouple if proper
		readings are not achieved. If readings are correct on the
		thermocouple, replace temperature display.

Low Profile – 1600-000-A Advantage Series Service Manual – Domestic 9