GE Profile PT925 Technical Service Manual

Also see for Appliances PT925: Owner's manual Installation instructions Owner's manual Owner's manual Owner's manual

– 51 –Using the Ribbon Cable for TroubleshootingThe ribbon cable allows the technician to inspect several key signals without removing the wall oven fromthe cabinet. To access the ribbon cable, remove the ribbon cable from the upper oven door as described in aprevious section. The plastic housing at the end of the ribbon cable is marked with a 1 and 14. These marksidentify the position of the signals within the ribbon cable.1 DC Common (Ground)2 LIN Communication Line3 12VDC4 Not Used5 Relay Enable6 Clean Upper7 Clean Lower8 Not Used9 Probe Signal10 Probe Ground11 Lower Oven Sensor Ground12 Lower Oven Sensor Signal13 Upper Oven Sensor Ground14 Upper Oven Sensor SignalProblem Possible Causes What To DoNothing in thedisplaySpecial Features setting If Special Features can be accessed, verify the clock is notturned off.Circuit breaker Verify circuit breaker is not tripped.12VDC to doorRemove ribbon cable from the upper door.•If 12VDC is between pin 1 and pin 3, check door wiring•and display/logic board.If 12VDC is NOT between pin 1 and pin 3, advance to•the next step.House wiringRemove the unit from the cabinet.•Confirm the wiring and power to the conduit is•correct.12VDC supplyIf 12VDC is NOT between pin 1 and pin 3 of J17 onthe main relay board, inspect the wiring harness andconnections; otherwise, replace the lower oven relayboard.(Continued Next Page)