1 SCHEMATIC DIAGRAM
5
1.1.
NN-SD691S, SD671S
5
1.2.
EXCEPT NN-SD691S & NN-SD671S
6
2 DESCRIPTION OF OPERATING SEQUENCE
7
2.1.
Variable power cooking control
7
2.2.
Inverter power supply circuit
7
2.3.
Inverter defrost
7
2.4.
Sensor cooking (Only for sensor models)
7
2.5.
Sensor reheat (Only for sensor models)
8
2.6.
Steam sensor and digital programmer circuit (Only for
sensor models)
8
2.7.
Thermistor
8
3 CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING 9
3.1.
Check the grounding
9
3.2.
Inverter warnings
9
3.3.
Part replacement.
10
3.4.
When the 20A fuse is blown due to the malfunction of the
monitor switch:
10
3.5.
Avoid inserting nails, wire etc. through any holes in the
unit during operation.
10
3.6.
Verification after repair
10
3.7.
Sharp edges
10
4 DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE 11
4.1.
Magnetron
11
4.2.
Digital programmer circuit (D.P.C)
11
4.3.
Low voltage transformer and/or power relays (RY1, RY2)
12
4.4.
Fan motor
12
4.5.
Door assembly
12
4.6.
Turntable motor
14
4.7.
Steam sensor (Only for sensor models)
14
4.8.
Inverter power supply
15
5 COMPONENT TEST PROCEDURE
16
5.1.
Primary, Secondary Interlock Switch & Power Relay RY1
16
5.2.
Monitor Switch
16
5.3.
Magnetron
16
5.4.
key board membrane (Membrane switch assembly)
16
5.5.
Inverter power supply (U)
17
6 MEASUREMENTS AND ADJUSTMENTS
18
6.1.
Adjustment of primary interlock switch, secondary interlock
switch and monitor switch.
18
6.2.
Measurement of microwave output
18
7 PROCEDURE FOR MEASURING MICROWAVE ENERGY
LEAKAGE
19
7.1.
Equipment
19
7.2.
Procedure for measuring radiation leakage
19
7.3.
Record keeping and notification after measurement
19
7.4.
At least once a year, have the radiation monitor checked
for calibration by its manufacturer.
20
8 TROUBLESHOOTING GUIDE
21
8.1.
(Troubleshooting) Oven stops operation during cooking 22
8.2.
(Troubleshooting) Other problems
23
8.3.
Troubleshooting of inverter circuit (U) and magnetron 24
8.4.
Trouble related to Digital Programmer Circuit
25
8.5.
SIMPLE WAY OF H.V. INVERTER/MAGNETRON
TROUBLESHOOTING
27
8.6.
H.V.INVERTER BOARD MAIN PARTS LIST
(F606Y8X00AP)
27
8.7.
How to check the semiconductors using an OHM meter
28
9 EXPLODED VIEW AND PARTS LIST
29
9.1.
EXPLODED VIEW
29
9.2.
PARTS LIST
30
9.3.
ESCUTCHEON BASE ASSEMBLY
31
9.4.
DOOR ASSEMBLY
34
9.5.
WIRING MATERIALS
35
9.6.
PACKING AND ACCESSORIES
36
10 DIGITAL PROGRAMMER CIRCUIT
37
10.1. SCHEMATIC DIAGRAM (NN-SD691S, SD671S)
37
10.2. SCHEMATIC DIAGRAM (EXCEPT NN-SD691S & NN-
SD671S)
39
10.3. PARTS LIST
41
CONTENTS
Page
Page
4
NN-SD691S / NN-ST681S / NN-SD671S / NN-ST671S / NN-ST661S / NN-ST661B / NN-ST661W / NN-ST651B / NN-ST651W
Summary of Contents for Inverter NN-ST651W
Page 2: ...2 NN SD691S NN ST681S NN SD671S NN ST671S NN ST661S NN ST661B NN ST661W NN ST651B NN ST651W ...
Page 3: ...3 NN SD691S NN ST681S NN SD671S NN ST671S NN ST661S NN ST661B NN ST661W NN ST651B NN ST651W ...
Page 38: ...38 NN SD691S NN ST681S NN SD671S NN ST671S NN ST661S NN ST661B NN ST661W NN ST651B NN ST651W ...
Page 40: ...40 NN SD691S NN ST681S NN SD671S NN ST671S NN ST661S NN ST661B NN ST661W NN ST651B NN ST651W ...
