Using The Ribbon Cable For Troubleshooting - GE Profile PT925 Technical Service Manual

Using the Ribbon Cable for Troubleshooting

The ribbon cable allows the technician to inspect several key signals without removing the wall oven from
the cabinet. To access the ribbon cable, remove the ribbon cable from the upper oven door as described in a
previous section. The plastic housing at the end of the ribbon cable is marked with a 1 and 14. These marks
identify the position of the signals within the ribbon cable.
Problem
Special Features setting
Circuit breaker
12VDC to door
Nothing in the
display
House wiring
12VDC supply
Possible Causes
If Special Features can be accessed, verify the clock is not
turned off.
Verify circuit breaker is not tripped.
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•
•
•
•
If 12VDC is NOT between pin 1 and pin 3 of J17 on
the main relay board, inspect the wiring harness and
connections; otherwise, replace the lower oven relay
board.
1 DC Common (Ground)
2 LIN Communication Line
3 12VDC
4 Not Used
5 Relay Enable
6 Clean Upper
7 Clean Lower
8 Not Used
9 Probe Signal
10 Probe Ground
11 Lower Oven Sensor Ground
12 Lower Oven Sensor Signal
13 Upper Oven Sensor Ground
14 Upper Oven Sensor Signal
What To Do
Remove 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.
Remove the unit from the cabinet.
Confirm the wiring and power to the conduit is
correct.
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