GE Consumer & Industrial PB978DP1BB, Technical Service Manual

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Oven Sensors
The current software version of the main logic board will cause the cooktop to become inoperative if either of
the sensors open.
If either sensor opens and the fault code sets to epprom memory (this takes about 3 min.), the cooktop will
become inoperative until the sensor is replaced.
Upper Oven room temp 1080 ohms
J501 Sensor Pins 1, 2 (white/black) clean temp 2650 ohms
Lower Oven room temp 1080 ohms
J502 Sensor Pins 1, 3 (white/red) clean temp 2650 ohms
Relay Board Voltages
Legend for Ladder Wiring Diagram
g g g
Relays and connectors that begin with are located on
MK, MJ RPSM MAIN board
DK, DJ Daughter relay board
AK, AJ RPSM AUX board
NOTE: Pin 1 on RPSM boards has a square solder pad.
Upper Oven
DK18-
DK3-NO DK3-NC COM DK18-NO MJ7-2 DK7-COM MJ7-1 MJ7-12
to L2 to L2 to L2 to L2 to L2 to L1 to N to L1
Standby 0 240VAC 240VAC 0 0 120VAC 0 0
Broil, Upper* 240VAC 0 0 0 240VAC 240VAC 0 –
Bake, Upper* 0 240VAC 240VAC 240VAC 240VAC 240VAC 0 –
Door Motor, Upper 0 240VAC 240VAC 0 0 120VAC 120VAC** –
Oven Lamp, Upper – – – – – – – 120VAC**
*When calling for heat
**When motor or light is on
Lower Oven
MK3-NO MK3-NC MK7-COM MK7-NO MK7-NC MK10-COM MK10-NO MK14-COM
to L2 to L2 to L2 to L2 to L2 to L2 to L2 MJ7-4 to L2 to L1 DJ-24 to N DJ6-1 to N DJ6-3 to N MJ7-8 to L1 DJ6-7 to N
Standby 0 240VAC 240VAC 0 240VAC 240VAC 0 0 120VAC 0 0 0 0 0
Broil , Lower* 240VAC 0 0 0 0 0 0 240VAC 240VAC 0 0 0 – 0
Bake , Lower* 0 240VAC 240VAC 240VAC 0 0 0 240VAC 240VAC 0 0 0 – 0
Convect , Lower* 0 240VAC 240VAC 0 240VAC 240VAC 240VAC 240VAC 240VAC See Convect Fan. – 0
Conv Fan CW See Convect Element. 120VAC 120VAC 0 – 0
Conv Fan CCW See Convect Element. 120VAC 0 120VAC – 0
Oven Lamp, Lower – – – – – – – – – – – – 120VAC** 0
Door Motor, Lower 0 240VAC 240VAC 0 240VAC 240VAC 0 0 120VAC 0 0 0 – 120VAC**
*When calling for heat
**When motor or light is on
Cooktop Voltage Table
AK2-COM AKB-NO AK13-NO AK11-NO AK5-NO AK6-COM AK1-NO AK4-NO AK10-COM AK14-COM
(J3) to L2 (J7-3) to L2 (J7-1) to L2 (J7-2) to L2 (J7-4) to L2 (J6) to L2 (J7-12) to L2 (J7-8) to L2 to L1 to L1
Standby 0 0 0 0 0 0 0 0 120VAC 120VAC
Only RF, all rings* 240VAC 240VAC 240VAC 0 0 0 0 0 240VAC 120VAC
Only RR* 0 0 0 240VAC 0 0 0 0 240VAC 120VAC
Only LF, all rings* 0 0 0 0 0 0 240VAC 240VAC 120VAC 240VAC
Only LR 0 0 0 0 0 240VAC 0 0 120VAC 240VAC
Only Center* 0 0 0 0 240VAC 0 0 0 120VAC 240VAC
*Use HIGH setting to test.