GE PT920 Technical Service Manual page 41

Line Voltage Testing
To test the line voltage at
the relay board, the black
wire is L1, The white wire
is neutral, and the red wire
is L2. The voltage should
be approximately 120 VAC
between L1 and N and
approximately 240 VAC
between L1 and L2. (See
photo.)
Convection Fan Motor
To test the convection fan
motor from the relay board,
disconnect the wire harness
at J8. The resistance should
read approximately 168 Ω at
room temperature between
the red and the blue wires
at pin 7 and pin 8 on J8. (See
photo.)
Sensor
To test the sensor from the
logic board, disconnect the
wire harnesses at J2 for
Lower Oven
single/upper oven and J3 for
Upper Oven
lower oven. The resistance
should read approximately
1080 Ω at room temperature
between the 2 white wires
at pin 9 and pin 10 on J2 for
single/upper oven, and J3
for lower oven. (Double oven
logic board shown.)
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