1 FEATURE CHART
5
2 CONTROL PANEL
5
3 SCHEMATIC DIAGRAM
6
4 DESCRIPTION OF OPERATING SEQUENCE
7
4.1.
Variable power cooking control
7
4.2.
Inverter power supply circuit
7
4.3.
Turbo defrost, Auto cook
7
4.4.
Grill cooking control
7
4.5.
Combination Cooking
7
5 CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING 8
5.1.
Check the grounding
8
5.2.
Inverter warnings
8
5.3.
Part replacement.
9
5.4.
When the 20A fuse is blown due to the malfunction of the
interlock monitor switch:
9
5.5.
Avoid inserting nails, wire etc. through any holes in the
unit during operation.
9
5.6.
Verification after repair
9
5.7.
Sharp edges
9
6 DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE 10
6.1.
Inverter power supply
10
6.2.
Magnetron
11
6.3.
Digital programmer circuit (D.P.C) & Membrane Switch 11
6.4.
Low voltage transformer and/or power relays (RL1,RL3)
13
6.5.
Fan motor
13
6.6.
Quartz heater
14
6.7.
Door assembly
14
6.8.
Stirrer motor
15
7 COMPONENT TEST PROCEDURE
16
7.1.
Primary, Secondary Interlock Switch & Power Relay RL1
16
7.2.
Interlock monitor Switch
16
7.3.
Magnetron
16
7.4.
Inverter power supply (U)
17
7.5.
Temperature thermistor
17
8 MEASUREMENTS AND ADJUSTMENTS
18
8.1.
Adjustment of Primary interlock switch, Secondary
interlock switch and Short switch.
18
8.2.
Measurement of microwave output
18
9 TROUBLESHOOTING GUIDE
19
9.1.
(Troubleshooting) Oven stops operation during cooking 19
9.2.
(Troubleshooting) Other problems
20
9.3.
Troubleshooting of inverter circuit (U) and magnetron 21
9.4.
Trouble related to Digital Programmer Circuit
22
9.5.
SIMPLE WAY OF H.V. INVERTER/MAGNETRON
TROUBLESHOOTING
23
9.6.
How to check the semiconductors using an OHM meter
24
9.7.
H.V.INVERTER BOARD MAIN PARTS LIST
(F606Y9X90AP)
24
10 EXPLODED VIEW AND PARTS LIST
25
10.1. EXPLODED VIEW
25
10.2. PARTS LIST
26
10.3. ESCUTCHEON BASE ASSEMBLY
27
10.4. DOOR ASSEMBLY
28
10.5. WIRING MATERIALS
29
10.6. PACKING AND ACCESSORIES
30
11 DIGITAL PROGRAMMER CIRCUIT
31
11.1. SCHEMATIC DIAGRAM
31
11.2. PARTS LIST
33
CONTENTS
Page
Page
4
NN-GF574S / NN-GF574M
Summary of Contents for NN-GF574S
Page 2: ...2 NN GF574S NN GF574M ...
Page 3: ...3 NN GF574S NN GF574M ...
Page 5: ...1 FEATURE CHART 2 CONTROL PANEL 5 NN GF574S NN GF574M ...
Page 6: ...3 SCHEMATIC DIAGRAM 6 NN GF574S NN GF574M ...
Page 25: ...10 EXPLODED VIEW AND PARTS LIST 10 1 EXPLODED VIEW 25 NN GF574S NN GF574M ...
Page 31: ...11 DIGITAL PROGRAMMER CIRCUIT 11 1 SCHEMATIC DIAGRAM 31 NN GF574S NN GF574M ...
Page 32: ...32 NN GF574S NN GF574M ...
