National NN-V680W, Service Manual

Page 1: ... 2001 Matsushita Electric Industrial Co Ltd All rights reserved Unauthorized copying and distribution is a violation of law NN V690P NN V690PS NN V680W NN V680WS Microwave Oven ORDER NO MOD0101240C3 ...

Page 2: ...ST PROCEDURE 18 8 MEASUREMENTS AND ADJUSTMENTS 21 9 TROUBLESHOOTING GUIDE NEW H V 22 10 HOW TO CHECK THE SEMICONDUCTORS USING AN OHM METER 27 11 INTRODUCING OF TEST JIGS 28 12 EXPLODED VIEW AND PARTS LIST 30 13 PARTS LIST 31 14 DOOR ASSEMBLY 33 15 ESCUTCHEON BASE ASSEMBLY 34 16 PACKING AND ACCESORIES 36 17 WIRING MATERIAL 38 18 DIGITAL PROGRAMMER CIRCUIT 39 19 DIGITAL PROGRAMMER CIRCUIT 41 CONTENT...

Page 3: ...20 INVERTER CIRCUIT 43 21 REF NO 35 INVERTER U 44 3 NN V690P NN V690PS NN V680W NN V680W ...

Page 4: ...1 CONTROL PANEL 4 NN V690P NN V690PS NN V680W NN V680WS ...

Page 5: ...2 OPERATION AND DIGITAL PROGRAMMER CIRCUIT TEST PROCEDURE 5 NN V690P NN V690PS NN V680W NN V680W ...

Page 6: ...6 NN V690P NN V690PS NN V680W NN V680WS ...

Page 7: ...3 SCHEMATIC DIAGRAM 3 1 SCHEMATIC DIAGRAM HNE KNQ KKE LNK MNQ SNM TNE YNQ 7 NN V690P NN V690PS NN V680W NN V680W ...

Page 8: ...3 2 SCHEMATIC DIAGRAM XNE ZPE 8 NN V690P NN V690PS NN V680W NN V680WS ...

Page 9: ... 4 3 Combination cooking Combination cooking is accomplished by microwave and grill cooking The digital programmer circuit controls ON OFF time of power relay 1 and 4 as shown in the table NOTE After grill and combination cooking fan motor rotates for 7 minutes to cool oven and electric components 4 4 Auto Defrost Control When those auto control feature is selected and Start pad is pressed 1 The d...

Page 10: ...acted from the T1 time In other words T1 time starts at the end of the 10 second period 2 T1 time The total amount of time it takes the microwave oven to switch to T2 time after the 10 second period 3 T2 time When the steam escapes from the cooking container placed in the oven the steam sensor detects it and the microprocessor calculates the balance of cooking time This T2 time is then shown in th...

Page 11: ...be taken during repair 5 1 Check the grounding Do not operate on a 2 wire extension cord The microwave oven is designed to be used when grounded It is imperative therefore to make sure it is grounded properly before beginning repair work 5 2 Inverter Warnings NEW H V 5 CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING 11 NN V690P NN V690PS NN V680W NN V680W ...

Page 12: ...o hold the switches 5 5 Avoid inserting nails wire etc through any holes in the unit during operation Never insert a wire nail or any other metal object through the lamp holes on the cavity or any other holes gaps because such objects may work as an antenna and cause microwave leakage 5 6 Confirm after repair 1 After repair or replacement of parts make sure that the screws of the oven etc are neit...

Page 13: ...age NOTE Magnetron used for this modes is unique type for inverter power supply system Make sure to use the one as listed in the part list 6 2 High Voltage Inverter Power Supply U NEW H V 1 Discharge high voltage capacitors 2 Remove 2 screws holding magnetron bracket Remove grounding wire 3 Remove 3 screws holding inverter and fan motor assembly 4 Unplug 3 connectors of inverter PCB 5 Remove 2 scr...

Page 14: ... closed 3 Release CN5 connector s lock of DPC by pushing both levers to inside and pull them upward and remove flat cable of membrane key board 4 Remove 3 screws holding DPC To replace membrane key board 5 Remove escutcheon bracket from escutcheon base by freeing 5 catch hooks on the escutcheon base 6 On some models the key board is not replaced with individual parts Instead the entire escutcheon ...

Page 15: ...y To remove door C 8 Release catch hooks from hinge pin side To remove door E 9 Remove screws holding door E to door A assembly After replacement of the defective component parts of the door reassemble it and follow the instructions below for proper installation and adjustment so as to prevent an excessive microwave leakage Adjustment of the door assembly 10 When mounting the door to the oven be s...

Page 16: ...s from heater terminals 2 Remove 1 screw holding heater supports 3 Remove the heater by pulling it out 6 7 Steam sensor 1 Remove 1 screw holding steam sensor unit 2 Disconnect CN2 connector from digital programmer circuit board 3 Remove exhaust guide from steam sensor unit 4 Remove catch hooks on sensor mounting plate and air guide 5 Remove steam sensor from sensor mounting plate NOTE When install...

Page 17: ...17 NN V690P NN V690PS NN V680W NN V680W ...

Page 18: ...itch with door opened and closed positions using lowest scale of the ohm meter Normal continuity readings should be as follows 7 3 Magnetron NEW H V Continuity checks can only indicate an open filament or a shorted magnetron To diagnose for an open filament or shorted magnetron 1 Isolate magnetron from the circuit by disconnecting the leads 2 A continuity check across magnetron filament terminals ...

Page 19: ...steam sensor function of the digital programmer circuit is in working order or not do the following test 1 Place a water load 150 cc in the oven 2 Tap Sensor Reheat pad 3 Tap Start Pad 4 Steam Sensor detects steam about 1 5 to 4 minutes after the Start Pad is tapped 5 T1 time cooking automatically switches to remaining time cooking T2 6 The remaining cooking time T2 appears in display window If th...

Page 20: ...NOTE 2 If checking an oven sensor thermistor just after the microwave oven has been operating the sensor of course won t be room temperature In this case the sensor must be removed and allowed to cool down to the 10 C to 30 C range 20 NN V690P NN V690PS NN V680W NN V680WS ...

Page 21: ...and all latch switches again by following the components test procedures 8 2 Measurement of microwave output The output power of magnetron can be determined by performing IEC standard test procedures However due to the complexity of IEC test procedures it is recommended to test the magnetron using the simple method outlined below Necessary Equipment 1 liter beaker Glass thermometer Wrist watch or ...

Page 22: ...9 TROUBLESHOOTING GUIDE NEW H V 22 NN V690P NN V690PS NN V680W NN V680WS ...

Page 23: ...23 NN V690P NN V690PS NN V680W NN V680W ...

Page 24: ...chassis ground Please refer to service manual for detail of the specified model 2 Remove inverter PCB from oven before troubleshooting Refer to related service manual for inverter PCB removal 1 Visual check a PCB board Any crack on board burnt printed copper foil pattern Any cockroach bugs excrements any mark of wet b Components Any damaged components Any burnt broken or missing 3 Check component ...

Page 25: ...1 To remove Q701 Q702 and DB701 unsolder their legs first next remove a screw that holding the heatsink onto the PCB then dtach the heatsink as shown below Service Hints For easy solder removal use one soldering iron to heat a solder and use solder sucker iron to suck solder 2 Make sure to replace both Q701 and Q702 at a time with the same maker 3 Make sure to apply heat conduction grease between ...

Page 26: ...er joint 1 Install Inverter PCB into oven with screws securely plug in CN701 CN702 and CN703 2 Insert AC plug through the Amper meter with specified voltage NOTE Current will be changed by the input AC voltage 3 Operate the oven at High power setting for 1 minute 4 Read input current which should be within oven specification NOTE Input current will be decreased after a certain cooking period 5 Adj...

Page 27: ...10 HOW TO CHECK THE SEMICONDUCTORS USING AN OHM METER 27 NN V690P NN V690PS NN V680W NN V680W ...

Page 28: ... JIGS 1 Power Check Microwave Oven Tester This tester can be measure both line voltage and ampares at a time for easy and quick testing microwave oven Part number Plug and Outlet type 28 NN V690P NN V690PS NN V680W NN V680WS ...

Page 29: ...ing door C 4 Flourescent light bulb 4W Part No A600Z FL4W This is convenient for check whether microwave is oscillate or not in a second WARNING Use it with full one litter of water load and make sure less than 10 seconds oscillation on each time Longer operation will cause over heat and burn the light bulb shortly 29 NN V690P NN V690PS NN V680W NN V680W ...

Page 30: ...12 EXPLODED VIEW AND PARTS LIST 30 NN V690P NN V690PS NN V680W NN V680WS ...

Page 31: ...XN CABINET BODY 1 NN V690P NN V690PS 9 A10094Y70HXN CABINET BODY 1 NN V680W NN V680WS 10 A11404J60AP STOPPER 2 10 A11404J60AP STOPPER 2 11 A11614X80MN REINFORCE BRACKET 1 12 A200A4Y60XN OVEN 1 13 A2011 1640 COVER 1 14 ANE0929000AH CUSHION RUBBER C 1 15 A21315870GP PULLEY SHAFT 1 16 ANE2177 F80 WASHER 17 ANE0928000AL CUSHION RUBBER C 1 18 A290D4J00XN ROLLER RING U 1 19 A3097 1660 SPRING 2 19 A3097 ...

Page 32: ...OR MAGNETRON 54 XTTANE4 6SX SCREW 1 4X6 FOR COVER 55 XTEANE3 6B SCREW 1 3X6 FOR THERMAL CUTOUT 56 XTWANE4 12LR SCREW 4 4X12 FOR HINGE 56 XTWANE4 12LR SCREW 4 4X12 FOR HINGE 57 XTWA4 8CF SCREW 2 4X8 FOR EARTH INVERTER CABLE 57 XTWA4 8CF SCREW 2 4X8 FOR EARTH INVERTER CABLE 58 XTW4 8T SCREW 2 4X8 FOR FAN MOTOR 59 2M236 M42G MAGNETRON 1 60 A80234J00XN ESCUTCHEON SASH 1 61 A300B 1640 LEFT HINGE 1 62 A...

Page 33: ...690PS D2 A302A4Y60GZP DOOR A U 1 NN V690P ZPE D2 A302A4Y70HHN DOOR A U 1 NN V680W NN V680WS D3 A3044 1640 RIGHT DOOR ARM 1 D4 A30854J00XN DOOR C 1 D5 A3252 1450 DOOR ARM SPACER 1 D6 XTN3 7Q SCREW 8 D6 XTN3 7Q SCREW 8 D6 XTN3 7Q SCREW 8 D6 XTN3 7Q SCREW 8 D7 A3054 1640 LEFT DOOR ARM 1 D8 A3230 1600 SPRING 2 D8 A3230 1600 SPRING 2 33 NN V690P NN V690PS NN V680W NN V680W ...

Page 34: ...CHEON SHEET 1 NN V690P ZPE E1 A83374Y70GMN ESCUTCHEON SHEET 1 NN V680W E1 A83374Y70GXN ESCUTCHEON SHEET 1 NN V680WS E2 A603L4Y60HN D P CIRCUIT U 1 NN V690P HNE NN V680W RTL W COMPONENT E2 A603L4Y60KN D P CIRCUIT U 1 NN V690P KNQ RTL W COMPONENT E2 A603L4Y60MN D P CIRCUIT U 1 NN V690P MNQ RTL W COMPONENT E2 A603L4Y60SN D P CIRCUIT U 1 NN V690P SNM KKE RTL W COMPONENT E2 A603L4Y60ZP D P CIRCUIT U 1 ...

Page 35: ...3 A630Y4Y60GMN MEMBRANE SWITCH U 1 NN V690P HNE MNQ TNE YNQ LNK E3 A630Y4Y60GKN MEMBRANE SWITCH U 1 NN V690P KKE KNQ SNM E3 A630Y4Y60GXN MEMBRANE SWITCH U 1 NN V690PS E3 A630Y4Y60GZP MEMBRANE SWITCH U 1 NN V690P ZPE E3 A630Y4Y70GMN MEMBRANE SWITCH U 1 NN V680W E3 A630Y4Y70GXN MEMBRANE SWITCH U 1 NN V680WS E4 A64584J00XN DISPLAY FILTER 2 E5 A80024J00XN ESCUTCHEON B 1 E6 A82844J00XN CUSHION RUBBER 1...

Page 36: ...NG CASE PAPER 1 NN V690P KKE SNM KNQ P5 A01024Y60XN PACKING CASE PAPER 1 NN V690PS NN V680WS P5 A01024Y60ZP PACKING CASE PAPER 1 NN V690P ZPE P6 A01044J00XN UPPER FILLER 1 NN V690P HNE MNQ TNE YNQ LNK NN V690PS NN V680W S P6 A01044J00KN UPPER FILLER 1 NN V690P KKE KNQ SNM P6 A01044J00ZP UPPER FILLER 1 NN V690P ZPE P7 A01054J00XN LOWER FILLER 1 NN V690P HNE MNQ TNE YNQ LNK NN V690PS NN V680W S P7 A...

Page 37: ... Set Remarks P16 A01134J00XN TRAY STYROL 1 P17 A0192 1100 PACKING 1 P18 A01174J00KN TRAY PACKING 1 NN V690P KNQ KKE SNM P19 A01264J00XN REINFORCE MATERIAL 1 NN V690P KNQ KKE SNM ZPE NN V690PS NN V680WS 37 NN V690P NN V690PS NN V680W NN V680W ...

Page 38: ...V690P HNE MNQ YNQ TNE KNQ KKE SNM LNK W1 A030A4Y60XN LEAD WIRE HARNESS 1 NN V690P ZPE NN V690PS NN V680WS W2 A030E4X80MN LEAD WIRE 1 W2 A030E4X80MN LEAD WIRE 1 W3 A6901 1170 FERRITE CORE 2 NN V690P ZPE NN V690PS NN V680WS W4 AECQJ5335KRP CAPACITOR 1 EXCEPT ZPE XNE 3 3MF 38 NN V690P NN V690PS NN V680W NN V680WS ...

Page 39: ...18 DIGITAL PROGRAMMER CIRCUIT SCHEMATIC DIAGRAM 39 NN V690P NN V690PS NN V680W NN V680W ...

Page 40: ...40 NN V690P NN V690PS NN V680W NN V680WS ...

Page 41: ...V690PS NN V680WS 8MHZ D25 ERZV10D511CS VARISTOR 1 V10511U D26 27 ERZV10D112C1 VARISTOR 2 V10112U D28 220 AEDNERA1502 DIODE SI 1A 2 ERA1502 D29 AESTS1WBA60B DIODE SI 1A 1 WBA60B D40 41 222 223 224 AESS133T 77 DIODE SI 0 1A 5 1SS133T D180 181 182 AESQTLGE260 LED 3 DISP11 0 AEDDHLC4X8XN DISPLAY 1 NN V690P HNE MNQ TNE YNQ NN V690PS NN V680WS NN V680W DISP11 0 AEDDHLC4X7QP DISPLAY 1 NN V690P KKE KNQ SN...

Page 42: ...S2TJ392T RESISTOR 1 3 9KΩ Ω Ω Ω 1 4W 5 R222 ERDS2TJ104T CARBON FILM RESISTOR 1 100KΩ Ω Ω Ω 1 4W 5 R223 354 AERJ3GSYJ104 RESISTOR 2 100KΩ Ω Ω Ω 1 16W 5 R482 483 ERDS2TJ105T RESISTOR 2 1MΩ Ω Ω Ω 1 16W 5 R320 J5 AERJ3GSYJ000 RESISTOR 2 0Ω Ω Ω Ω 1 16W 5 R330 AERJ3GSYJ333 RESISTOR 1 33KΩ Ω Ω Ω 1 16W 5 R331 AERJ3GSYJ471 RESISTOR 1 470Ω Ω Ω Ω 1 16W 5 R480 481 AERJ3GSYJ472 RESISTOR 2 4 7KΩ Ω Ω Ω 1 16W 5 R...

Page 43: ...20 INVERTER CIRCUIT SCHEMATIC DIAGRAM 43 NN V690P NN V690PS NN V680W NN V680W ...

Page 44: ...D704 705 AEDNERA1506 DIODE SI 1A 2 ERA1506 D706 MA196 TA5 DIODE SI 0 1A 1 MA196 DB701 AESTRBV6206 DIODE SI 15A 1 15A 600V H S A66914T00AP HEAT SINK 1 IC702 703 AEICP25011HL IC 2 PS2501 1 HL 4P IC801 AN9DB07SB IC 1 L701 A50204T00AP COIL 1 Q701 AESCGL60N90 TRANSISTOR SI 170W 1 Q701 XTW3 12B SCREW 2 3X12 Q702 AESPGT30J322 TRANSISTOR SI 75W 1 GT30J322 Q702 XTN3 12B SCREW 1 3X12 Q703 704 2SC3311AQSTA T...