GE JK3800DH1BB Technical Service Manual

Also see for PT7800DH1BB: Installation instructions Owner's manual

Contents

GE JK3800DH1BB Technical Service Manual Manual pdf 49 page image

– 49 –Damper Door SwitchThe damper door sensing switch is mounted to thedamper assembly. The switch monitors the damperdoor position and provides this information to themain PCB, which controls the operation of thedamper door motor.When the damper door is closed, the switch is open.The motor will run until the switch sends the doorclosed signal. If the damper door sensing switchcircuit shorts (or opens), the damper motor will runcontinually. The damper motor has an approximateUHVLVWDQFHYDOXHRINűDamper Door Operating ModesCookingModeDamperPositionSwitchPlungerPositionSwitchContactsMicrowave Open NotDepressedClosedSpeedcook Closed Depressed OpenMagnetron and Magnetron TCOWARNING: Always be certain the capacitor isdischarged before servicing. (See the Capacitor andDiode section in this guide.) Mechanically dischargeby placing insulated pliers between the diodeconnection of the capacitor and the oven chassisground.NOTE: The capacitor has an internal dischargeresistor that automatically discharges the capacitorwhen the oven turns OFF. Under normal operation,the capacitor should fully discharge within 30seconds.The oven must be removed to access themagnetron. (See the Removing Upper Oven sectionin this guide.) The magnetron is located behind thetop access cover. The top access cover is held inplace by two Phillips head screws. The magnetronis held in place by four Phillips head screws. Themagnetron thermostat must be disconnectedbefore removing the magnetron.Magnetron TCOThe magnetron TCO is attached to a bracketmounted to the magnetron. The magnetron bracketis held in place by a single Phillips head screw.This position of the magnetron TCO allows it tosense the temperature of the magnetron.The magnetron TCO opens at 302°F and cannot bereset. If the magnetron TCO opens, it will disable alloven functions including the display.