GE JP938 Technical Service Manual

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GE JP938 Technical Service Manual Manual pdf 27 page image

– 25 –Surface Element ReplacementNote: The surface element, pan sensor, andtemperature sensor are only replaceable as anassembly, which includes the sensor wire harnessand connector.1. Remove the glass and cooktop from thecountertop (see the procedure).5. When the TIMER window displays DISC andthe U symbol stops flashing in the LF surfaceelement power window, center the aluminumdisk on the LF surface element.6. Press the PAN and LF (+) keys at the sametime. The electronic control will perform thecalibration on the LF sensor and then proceedto the next surface element. The TIMERwindow will flash CAL and the U symbol willflash in the LR surface element power window.7. Repeat steps 5 and 6 for the LR, CR (ifpresent), RR, and RF surface elements.8. After the RF surface element has been cali-brated, the timer window will display a PASS orFAIL message for the entire calibration proce-dure. An F will be displayed in the surfaceelement power window of any sensor that failsthe process. Acknowledge this message andexit the calibration procedure by pressing thePAN and RF (+) keys at the same time.Note: If the calibration proceedure is interupted forany reason, exit the calibration proceedure bypressing the PAN and RF (+) keys at the sametime.Note: Failure of the calibration procedure mayoccur for several reasons. If the calibration proce-dure fails, follow these steps:• Try calibrating the cooktop again, beginning withstep 1 from above.• Identify the sensor(s) that fails the calibrationprocedure.• If multiple sensors fail the calibration procedure,replace the logic board.• If only one sensor fails the calibration procedure,replace the corresponding surface element.Caution: Do not cut the wire ties from the wireharness. Care must be taken to ensure thatonly the sensor wires to the surface elementbeing replaced are cut.Caution: Routing of the wires is extremelycritical. Care must be taken to ensure the wiresare routed exactly the way they were originally.GEA00756Sensor WireHarnessSurface ElementPower WiresRemove Cut WiresFrom Wire BundleTie Wrap (Do Not Cut)To Power BoardOld HeatingElement3. Using diagonal cutters, snip both the tempera-ture sensor and the pan sensor wires andremove them from the wire harness leadingfrom the logic board to the surface element.Note: When installing the new surface element,tie-wrap temperature sensor and pan sensor wiresto the existing wire harness. Do not cut existingwire harness. Do not cut existing tie wraps.GEA00861Surface ElementPower WiresExisting Wire Ties(Do Not Cut)To Power BoardNew HeatingElementTie-Wrap New WiresTo Wire Bundle2. Disconnect the appropriate sensor connectorfrom the logic board by pulling upward on theconnector. (Do not disconnect the connector bypulling on the sensor wires.) Trace the sensorwires back to the appropriate surface element,making note of where and how the wires arerouted.