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Low Profile – 1600-000-A Advantage Series Service Manual – Domestic
9
Display Transformer Measure the transformer primary for a nominal 120 VAC input,
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
inoperative
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
inaccurate, erratic or
inoperative
Thermocouple Connect the thermocouple of a pyrometer to the thermocouple
on the temperature control board. (Be sure to maintain proper
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.