Microwave Oven 1
1. FEATURE CHART 5
2. CONTROL PANEL (APH) 6
3. CONTROL PANEL (CPH) 7
4. OPERATION AND DIGITAL PROGRAMMER CIRCUIT TEST PROCEDURE 8
4.1. To set clock 8
4.2. Time cooking for two stage 9
4.3. Inverter turbo defrost 10
4.4. Inverter auto cooking 10
4.5. Popcorn 11
4.6. Auto reheat 11
4.7. Power level 12
5. SCHEMATIC DIAGRAM (APH) 12
6. SCHEMATIC DIAGRAM (CPH) 13
7. DESCRIPTION OF OPERATING SEQUENCE 14
7.1. Variable power cooking control 14
Variable Power Cooking 14
7.2. Inverter power supply circuit [NEW H.V.] 15
7.3. Inverter turbo defrost 15
Inverter Turbo Defrost 16
8. CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING 16
8.1. Check the grounding 16
8.2. Inverter warnings [NEW H.V.] 16
8.3. When parts must be replaced, remove the power plug from the outlet. 18
8.4. When the 18 Amp fuse is blown due to the operation of short switch: 18
8.5. Avoid inserting nails, wire, etc. through any holes in the unit during operation. 18
8.6. Confirm after repair 19
9. DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE 20
9.1. Magnetron 20
9.2. Digital programmer circuit (DPC) and membrane key board. 20
9.3. Low voltage transformer and/or power relays (RY1, RY2) 21
9.4. Inverter power supply (U) 22
9.5. Door assembly 24
9.6. Stirrer motor 25
9.7. Blower motor (U) 25
9.8. Fan motor A (for H.V. inverter (U) cooling) 25
9.9. Fan motor B (for magnetron cooling) 26
9.10. Turntable motor 26
10. COMPONENT TEST PROCEDURE 27
10.1. Primary latch switch, secondary (secondary latch switch and power relay B) interlocks. 27
10.2. Short switch & monitor 27
10.3. Magnetron 28
10.4. Membrane key board (Membrane switch assembly) 28
10.5. Inverter power supply (U) 28
11. MEASUREMENTS AND ADJUSTMENTS 30
11.1. Adjustment of primary latch switch, secondary latch switch and short switch. 30
11.2. Measurement of microwave output 31
TABLE (1L-1min.test) 31
12. PROCEDURE FOR MEASURING MICROWAVE ENERGY LEAKAGE 32
12.1. Equipment 32
12.2. Procedure for measuring radiation leakage 32
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Summary of Contents for Inverter NN-H275
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Page 6: ...1 SCHEMATIC DIAGRAM 1 1 APH NN P295 H275 1 2 APH NN S255 6 ...
Page 7: ...1 3 APH NN H264 FR S254 FR 7 ...
Page 8: ...1 4 CPH NN P295 H275 8 ...
Page 9: ...1 5 CPH NN S255 S245 9 ...
Page 10: ...2 MEASUREMENTS AND ADJUSTMENTS 10 ...
Page 19: ...40 F607V6Z00AP LAMP COVER U 1 19 ...
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Page 31: ...7 2 NN H275 APH CPH NN S255 APH CPH 31 ...
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Page 33: ...7 3 NN S245 CPH H264 FR APH S254 FR APH 33 ...
Page 34: ...34 ...
Page 35: ...7 4 PARTS LIST 7 4 1 NN P295 APH CPH S255 APH CPH 35 ...
Page 44: ...reserved Unauthorized copying and distribution is a violation of law 2 ...
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Page 47: ...5 ...
Page 49: ...3 CONTROL PANEL CPH 7 ...
Page 50: ...4 OPERATION AND DIGITAL PROGRAMMER CIRCUIT TEST PROCEDURE 4 1 To set clock 8 ...
Page 55: ...6 SCHEMATIC DIAGRAM CPH 13 ...
Page 76: ...13 TROUBLESHOOTING GUIDE 34 ...
Page 81: ...13 3 How to check the semiconductors using an OHM meter 14 EXPLODED VIEW AND PARTS LIST 39 ...
Page 89: ...20 DIGITAL PROGRAMMER CIRCUIT SCHEMATIC DIAGRAM 47 ...