1 SCHEMATIC DIAGRAM 5
1.1. APH
5
1.2. CPH
6
1.3. RPH
7
2 DESCRIPTION OF OPERATING SEQUENCE
8
2.1. Variable power cooking control
8
2.2. Inverter power supply circuit NEW H.V.
8
2.3. Inverter defrost
8
2.4. Sensor cooking (Only for sensor models)
8
2.5. Sensor reheat (Only for sensor models)
9
2.6. Steam sensor and digital programmer circuit (Only for
sensor models)
9
2.7. Thermistor
9
3 CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING
10
3.1. Check the grounding
10
3.2. Inverter warnings
10
3.3. Part replacement.
11
3.4. When the 20A fuse is blown due to the operation of the
short switch:
11
3.5. Avoid inserting nails, wire etc. through any holes in the
unit during operation.
11
3.6. Confirm after repair
11
3.7. Sharp edges
11
4 DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE
12
4.1. Magnetron
12
4.2. Digital programmer circuit (D.P.C)
12
4.3. Low voltage transformer and/or power relays (RY1, RY2)
13
4.4. Fan motor
13
4.5. Door assembly
13
4.6. Turntable motor
14
4.7. Steam sensor
14
4.8. Inverter power supply
15
5 COMPONENT TEST PROCEDURE
16
5.1. Primary latch switch (door switch and power relay B)
interlocks.
16
5.2. Short switch & monitor
16
5.3. Magnetron
16
5.4. Membrane key board (Membrane switch assembly)
16
5.5. Inverter power supply (U)
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 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.
19
8 TROUBLESHOOTING GUIDE
20
8.1. (Trouble) Oven stops operation during cooking
20
8.2. Troubleshooting of inverter circuit (U) and magnetron
NEW H.V.
22
8.3. Simple way of H.V. Inverter/magnetron troubleshooting
23
8.4. How to check the semiconductors using an OHM meter
23
9 EXPLODED VIEW AND PARTS LIST
24
9.1. EXPLODED VIEW
24
9.2. PARTS LIST
25
9.3. DOOR ASSEMBLY
27
9.4. ESCUTCHEON BASE ASSEMBLY
28
9.5. PACKING AND ACCESSORIES
33
9.6. WIRING MATERIALS
34
10 DIGITAL PROGRAMMER CIRCUIT
35
10.1. NN-T695SF APH/CPH, T695SF/SM RPH
35
10.2. NN-T685SF APH/CPH, T675SF APH
37
10.3. NN-T665SF APH, T655SF APH, T664SFR APH
39
10.4. NN-H665 APH/CPH, H635 APH, S655 APH, S645 APH,
S615 CPH
41
10.5. NN-H645 APH, S635 APH/CPH, H625 APH, S625 CPH,
S605 CPH, S505 APH/CPH, S655 RPH, S645 RPH,
H624*FR APH, H504*FR APH
43
10.6. PARTS LIST
45
CONTENTS
Page Page
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NN-T695 NN-T685SF
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