1 SCHEMATIC DIAGRAM
5
2 DESCRIPTION OF OPERATING SEQUENCE
6
2.1.
Variable power cooking control
6
2.2.
Inverter power supply circuit
6
2.3.
Turbo defrost, Auto cook
6
2.4.
Thermistor
6
2.5.
Convection Cooking Control
6
2.6.
Grill cooking
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 15A fuse is blown due to the malfunction of the
short switch:
8
3.5.
Avoid inserting nails, wire etc. through any holes in the
unit during operation.
8
3.6.
Verification 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)
10
4.3.
Low voltage transformer and/or power relays (RY1)
11
4.4.
Fan motor
11
4.5.
Door assembly
12
4.6.
Turntable motor
12
4.7.
Quartz heater
13
4.8.
Convection fan assembly
13
4.9.
Inverter power supply
14
5 COMPONENT TEST PROCEDURE
16
5.1.
Primary, Secondary Latch Switch interlocks & Power
Relay RY1
16
5.2.
Short Switch
16
5.3.
Magnetron
16
5.4.
Inverter power supply (U)
17
5.5.
Temperature thermistor
17
6 MEASUREMENTS AND ADJUSTMENTS
18
6.1.
Adjustment of primary latch switch, secondary latch switch
and short switch.
18
6.2.
Measurement of microwave output
18
7 TROUBLESHOOTING GUIDE
19
7.1.
(Troubleshooting) Oven stops operation during cooking 19
7.2.
(Troubleshooting) Other problems
20
7.3.
Troubleshooting of inverter circuit (U) and magnetron 21
7.4.
Simple way of H.V. Inverter/magnetron troubleshooting 22
7.5.
How to check the semiconductors using an OHM meter
22
7.6.
H.V. INVERTER MAIN PARTS LIST (Z606YBH20GP) 23
8 EXPLODED VIEW AND PARTS LIST
24
8.1.
EXPLODED VIEW
24
8.2.
PARTS LIST
25
8.3.
ESCUTCHEON BASE ASSEMBLY
27
8.4.
DOOR ASSEMBLY
29
8.5.
WIRING MATERIALS
30
8.6.
PACKING AND ACCESSORIES
31
9 DIGITAL PROGRAMMER CIRCUIT
32
9.1.
SCHEMATIC DIAGRAM (NN-CT585S) (D.P.C. (AU)
BOARD)
32
9.2.
SCHEMATIC DIAGRAM (NN-CT585S) (D.P.C. (DU)
BOARD)
34
9.3.
SCHEMATIC DIAGRAM (NN-CT565M, NN-CT555W) 36
CONTENTS
Page
Page
4
NN-CT585S / NN-CT565M / NN-CT555W
