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.
Inverter defrost
6
2.4.
Grill cooking control
6
2.5.
Combination Cooking
6
2.6.
Sensor cooking
7
2.7.
Sensor reheat
7
2.8.
Steam sensor and digital programmer circuit
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
interlock 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)
12
4.4.
Fan motor
12
4.5.
Door assembly
12
4.6.
Turntable motor
14
4.7.
Quartz heater
14
4.8.
Steam sensor
15
4.9.
Inverter power supply
16
5 COMPONENT TEST PROCEDURE
17
5.1.
Primary, Secondary Interlock Switch & Power Relay RY1
17
5.2.
Interlock Monitor Switch
17
5.3.
Magnetron
17
5.4.
Inverter power supply (U)
18
5.5.
Temperature thermistor
18
6 MEASUREMENTS AND ADJUSTMENTS
19
6.1.
Adjustment of primary interlock switch, secondary interlock
switch and interlock monitor switch.
19
6.2.
Measurement of microwave output
19
7 PROCEDURE FOR MEASURING MICROWAVE ENERGY
LEAKAGE
20
7.1.
Equipment
20
7.2.
Procedure for measuring radiation leakage
20
7.3.
Record keeping and notification after measurement
20
7.4.
At least once a year, have the radiation monitor checked
for calibration by its manufacturer.
21
8 TROUBLESHOOTING GUIDE
22
8.1.
(Troubleshooting) Oven stops operation during cooking 23
8.2.
(Troubleshooting) Other problems
24
8.3.
Troubleshooting of inverter circuit (U) and magnetron 25
8.4.
Trouble related to Digital Programmer Circuit
26
8.5.
SIMPLE WAY OF H.V. INVERTER/MAGNETRON
TROUBLESHOOTING
27
8.6.
H.V.INVERTER BOARD MAIN PARTS LIST
(F606Y9X90AP)
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
32
9.4.
DOOR ASSEMBLY
33
9.5.
WIRING MATERIALS
34
9.6.
PACKING AND ACCESSORIES
35
10 DIGITAL PROGRAMMER CIRCUIT
36
10.1. SCHEMATIC DIAGRAM
36
10.2. PARTS LIST
38
CONTENTS
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Page
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NN-GN68KS
Summary of Contents for NN-GN68KS
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Page 36: ...10 DIGITAL PROGRAMMER CIRCUIT 10 1 SCHEMATIC DIAGRAM 36 NN GN68KS...
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