NN-G335WF CONTENTS Page Page 1 SCHEMATIC DIAGRAM 5.1. Primary, Secondary Latch Switch Interlocks 2 DESCRIPTION OF OPERATING SEQUENCE 5.2. Short Switch & Monitor 2.1. Variable power cooking control 5.3. High voltage transformer 2.2. Turbo Defrost, Auto Reheat, Auto Cook control 5.4.
NN-G335WF 2 DESCRIPTION OF OPERATING SEQUENCE 2.1. Variable power cooking 2.2. Turbo Defrost, Auto Reheat, control Auto Cook control The coil of power relay B (RY1) is energized intermittently by When those Auto Control feature is selected and the Start Pad...
NN-G335WF 3 CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING Unlike many other appliances, the microwave oven is high- 3.3. When parts must be replaced, voltage, high-current equipment. Though it is free from danger unplug the power cord from in ordinary use, extreme care should be taken during repair.
NN-G335WF 4 DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE 4.1. Magnetron 4.2. Digital Programmer Circuit (DPC) and membrane key 1. Discharge the high voltage capacitor. board. 2. Remove 1 screw holding air guide A & reinforce bracket. 3. Disconnect 2 high voltage lead wires from magnetron NOTE: filament terminals.
NN-G335WF 4.4. Fan motor 4.3. Low voltage transformer and/or power relays (RY1, 1. Disconnect 2 lead wires from fan motor terminals. RY2) 2. Remove 1 screw holding diode (U) on side of the oven. 3. Disconnent 2 H.V. lead wires which linking to H.V.
NN-G335WF 4.5. Door assembly 4.6. Turntable motor 1. Remove door C from door E by carefully pulling outward 1. Remove the motor cover by breaking off at the 4 spots starting from upper right hand corner using a flat blade indicated by arrows with a cutter or the like.
NN-G335WF 5 COMPONENT TEST PROCEDURE 5.3. High voltage transformer WARNING 1. High voltage is present at the high voltage terminal of the high voltage transformer during any cook cycle. 1. Remove connectors from the transformer terminals and 2. It is neither necessary nor advisable to attempt measurement of the check continuity.
NN-G335WF 5.5. Magnetron 5.6. Diode (U) Continuity checks can only indicate an open filament or a 1. Isolate the diode (U) from the circuit by disconnecting the shorted magnetron. To diagnose for an open filament or leads. shorted magnetron: 2. With the ohmmeter set on the highest resistance scale, 1.
NN-G335WF 6 MEASUREMENTS AND ADJUSTMENTS 6.1. Adjustment of Primary latch 6.2. Measurement of microwave switch, Secondary latch output switch and Short switch. The output power of the magnetron can be determined by performing IEC standard test procedures. However, due to the 1.
NN-G335WF 7 TROUBLESHOOTING GUIDE DANGER: HIGH VOLTAGES 1. Ensure proper grounding before troubleshooting. 2. Be careful of high voltage circuit. 3. Discharge high voltage capacitor. 4. When checking the continuity of the switches or the high voltage transformer,disconnect one lead wire from these parts and then check continuity with the AC plug removed.
NN-G335WF 8.2. PARTS LIST NOTE: 1. When ordering replacement part(s), please use part number(s) shown in this part list. Do not use description of the part. 2. Important safety notice: Components identified by mark have special characteristics important for safety.
NN-G335WF 8.3. DOOR ASSEMBLY Ref. No. Part No. Part Name & Description Pcs/Set Remarks F30186S10XP DOOR KEY A F301A6S10HXP DOOR A (U) F302K6S40XP DOOR E (U) F30216S10XP DOOR KEY SPRING F30856S10XP DOOR C F31455G10XN DOOR SCREEN A F31466S10XP DOOR SCREEN B...