1 SCHEMATIC DIAGRAM
5
2 DESCRIPTION OF OPERATING SEQUENCE
6
2.1.
Variable power cooking control
6
2.2.
Inverter power supply circuit NEW H.V.
6
2.3.
Inverter defrost, Auto menu & Auto reheat
6
3 CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING 7
3.1.
Check the grounding
7
3.2.
Inverter warnings
7
3.3.
Part replacement.
8
3.4.
When the 10A fuse is blown due to the operation of the
short switch:
8
3.5.
Avoid inserting nails, wire etc. through any holes in the
unit during operation.
8
3.6.
Confirm after repair
8
3.7.
Sharp edges
8
4 DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE 9
4.1.
Magnetron
9
4.2.
Digital programmer circuit (D.P.C) and membrane key
board.
9
4.3.
Low voltage transformer and/or power relays (RY1, RY2)
10
4.4.
Fan motor
10
4.5.
Door assembly
11
4.6.
Turntable motor
11
4.7.
Quartz heater
12
4.8.
H.V. Inverter Power Supply
12
5 COMPONENT TEST PROCEDURE
13
5.1.
Primary latch switch (door switch and power relay B)
interlocks.
13
5.2.
Short switch & monitor
13
5.3.
Magnetron
13
5.4.
Membrane key board (Membrane switch assembly)
13
5.5.
Inverter power supply (U)
14
5.6.
Temperature thermistor
14
6 MEASUREMENTS AND ADJUSTMENTS
15
6.1.
Adjustment of Primary latch switch, Secondary latch
switch and Short switch.
15
6.2.
Measurement of microwave output
15
7 TROUBLESHOOTING GUIDE
16
7.1.
(Trouble) Oven stops operation during cooking
16
7.2.
Trouble related to Digital Programmer Circuit
18
7.3.
Troubleshooting of inverter circuit (U) and magnetron
NEW H.V.
19
7.4.
Simple way of H.V. Inverter/magnetron troubleshooting 20
7.5.
How to check the semiconductors using an OHM meter
20
8 EXPLODED VIEW AND PARTS LIST
21
8.1.
EXPLODED VIEW
21
8.2.
PARTS LIST
22
8.3.
DOOR ASSEMBLY
23
8.4.
WIRING MATERIALS
23
8.5.
ESCUTCHEON BASE ASSEMBLY
24
8.6.
PACKING AND ACCESSORIES
26
8.7.
H.V. INVERTER MAIN PARTS LIST
26
9 DIGITAL PROGRAMMER CIRCUIT
27
9.1.
SCHEMATIC DIAGRAM (NN-GD376S)
27
9.2.
SCHEMATIC DIAGRAM (NN-GD366M, GD356W)
29
9.3.
PARTS LIST
31
CONTENTS
Page
Page
4
NN-GD376S / NN-GD366M / NN-GD356W
Summary of Contents for NN-GD376S
Page 2: ...2 NN GD376S NN GD366M NN GD356W ...
Page 3: ...3 NN GD376S NN GD366M NN GD356W ...
Page 5: ...1 SCHEMATIC DIAGRAM 5 NN GD376S NN GD366M NN GD356W ...
Page 18: ...7 2 Trouble related to Digital Programmer Circuit 18 NN GD376S NN GD366M NN GD356W ...
Page 21: ...8 EXPLODED VIEW AND PARTS LIST 8 1 EXPLODED VIEW 21 NN GD376S NN GD366M NN GD356W ...
Page 27: ...9 DIGITAL PROGRAMMER CIRCUIT 9 1 SCHEMATIC DIAGRAM NN GD376S 27 NN GD376S NN GD366M NN GD356W ...
Page 28: ...28 NN GD376S NN GD366M NN GD356W ...
Page 29: ...9 2 SCHEMATIC DIAGRAM NN GD366M GD356W 29 NN GD376S NN GD366M NN GD356W ...
