GE JVM1750 Technical Service Manual

Also see for Spacemaker JVM1540: Owner's manual Owner's manual Owner's manual Installation instructions User guide

GE JVM1750 Technical Service Manual Manual pdf 28 page image

– 28 –Interlocks (Door Latch Switches)The interlocks are designed as follows:Primary - Bottom switch operated by bottom latchpawl connected to line (L) leg.To test the interlocks:Disconnect power to the oven.1.Open the control panel.2.Discharge the capacitor.3.Check continuity of COM and N.O.:4.Door Closed - 0• ΩDoor Open - ∞• ΩMonitor SwitchThe monitor switch is located between the top andbottom interlocks. The monitor switch is operatedindirectly by the bottom latch pawl.To test the interlock system:Disconnect power to the oven.1.Open the control panel.2.Discharge the capacitor.3.Disconnect the monitor switch leads and test at4.the terminals:Door Closed - ∞• ΩDoor Open - 0• Ω5. Reconnect the switch wiring.6. Test the circuit operation:a. Connect temporary jumper across relaycontacts and primary switch to simulateshorted switch contacts. Locate convenientconnections in circuit to be certain COMand N.O. terminals are used.b. Connect an ohmmeter (Low Scale) acrossthe two line terminals of the appliancepower cord. Continuity must show:Door Closed - Some• ΩDoor Open - 0• Ωc. Remove the 20-Amp. fuse - the circuit mustopen (∞ Ω). If not, check the wiring of themonitor and interlock circuits.7. After the test, remove temporary jumper leadsfrom interlocks and relay. Reconnect monitorswitch leads, replace fuse.8. Replacement of any parts in monitor circuitrequires repeating this entire test procedure.The switch housing is not adjustable. It is fixed onthe front cavity with two screws.IMPORTANT - CHECK FOR MICROWAVE LEAKAGEAFTER REPLACING OR ADJUSTING DOOR, INTERLOCKSWITCHES OR BRACKETS.