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CAUTION

To prevent electric shock, do not touch the metal bar connected
to the heaters.

4.1. H.V. Inverter

CAUTION

1. Always leave the grounding plate in place.
2. Always securely tighten the ground screw through the bottom of the
chassis (base).
3. Securely connect 3 lead wire connectors.
4. Make sure the heat sink has enough space (gap) from the oven.
Take special care not to dress any lead wire over the aluminum heat
sink because it is hot.

 1. Discharge high voltage remaining in high voltage capacitor.

 2. Disconnect 2 high voltage lead wires from magnetron

filament terminals.

 3. Disconnect connector CN701 & CN702 from H.V. Inverter

board.

 4. Remove 1 screw holding inverter bracket on oven back

plate.

 5. Remove 2 screws holding inverter bracket on right heater

panel.

4 DISASSEMBLY AND PARTS REPLACEMENT

PROCEDURE

10

NN-DF383B

Содержание NN-DF383B

Страница 1: ... Panasonic Appliances Microwave Oven Shanghai Co Ltd 2013 NN DF383B HPE Hong Kong YPQ Singapore MPQ Malaysia TPE Thailand TTE Indonesia FCE India YTE Others Microwave Oven ORDER NO PAPMOSH1304023CE ...

Страница 2: ...2 NN DF383B ...

Страница 3: ...3 NN DF383B ...

Страница 4: ...4 9 Lower Heater Heater AU 18 5 COMPONENT TEST PROCEDURE 21 5 1 Primary Secondary Latch Switch interlocks Power Relay RY1 21 5 2 Short Switch 21 5 3 Magnetron 21 5 4 key board membrane Membrane switch assembly 21 5 5 Inverter power supply U 22 5 6 Temperature thermistor 22 6 MEASUREMENTS AND ADJUSTMENTS 23 6 1 Adjustment of Primary latch switch Secondary latch switch and Short switch 23 6 2 Measur...

Страница 5: ...1 SCHEMATIC DIAGRAM 5 NN DF383B ...

Страница 6: ... signal is fed back to the microcomputer in the DPC to determine operating conditions and output necessary to control PWM signal to the Inverter Power Supply for control of the output power 2 3 Turbo defrost Auto cook When the Auto Control feature is selected and the Start pad is tapped 1 The digital programer circuit determines the power level and cooking time to complete cooking and indicates th...

Страница 7: ...m Sensor function is normal T1 TIME T2 TIME Remainingcooking time 50 Sec 2 Min 0 Sec 24 Sec 2 6 Grill cooking control Grill cooking is accomplished by upper heaters only One grill cooking cycle is 33 seconds 1 During grill cooking the digital programmer circuit controls power relay RY4 s ON OFF time In all three grill cooking categories power relay RY1 always stay ON but RY4 s ON OFF time are show...

Страница 8: ...e aluminum heat sink The aluminum heat sink may be HOT due to heat energy therefore extreme care should be taken during servicing H V Inverter warning WARNING FOR INVERTER POWER SUPPLY U GROUNDING Check the High Voltage Inverter Power Supply circuit grounding The high voltage inverter power supply circuit board must have a proper chassis ground The inverter grounding plate must be connected to the...

Страница 9: ...the unit during operation Never insert a wire nail or any other metal object through the lamp holes on the cavity or any holes or gaps because such objects may work as an antenna and cause microwave leakage 3 6 Verification after repair 1 After repair or replacement of parts make sure that the screws of the oven etc are neither loosen or missing Microwave energy might leak if screws are not proper...

Страница 10: ...k has enough space gap from the oven Take special care not to dress any lead wire over the aluminum heat sink because it is hot 1 Discharge high voltage remaining in high voltage capacitor 2 Disconnect 2 high voltage lead wires from magnetron filament terminals 3 Disconnect connector CN701 CN702 from H V Inverter board 4 Remove 1 screw holding inverter bracket on oven back plate 5 Remove 2 screws ...

Страница 11: ...6 Remove 1 screw holding lamp bracket 7 Remove 4 screws on inverter reinforcement bracket 8 Remove 1 screw holding oven thermistor on the oven cavity 11 NN DF383B ...

Страница 12: ...nit from the oven cavity 11 Remove 2 screws holding H V Inverter on inverter bracket 4 2 Magnetron 1 Steps same as disassembly of H V Inverter step 1 to step 10 2 Remove 1 screw holding thermistor on magnetron 3 Remove 2 screws holding air guide A on oven cavity and magnetron respectively 4 Remove 2 screws holding air guide bracket on magnetron 12 NN DF383B ...

Страница 13: ... circuit D P C Membrane Sheet NOTE Be sure to ground any static electric charge built up on your body before handling the D P C 1 Remove 1 screw holding escutcheon base on oven cavity front plate 2 Disconnect all connectors from D P C board 3 Disconnect connector CN701 from H V Inverter board 4 Remove 1 screw holding D P C board DU relay board on back plate 5 Remove 3 screws holding back plate 6 R...

Страница 14: ...hed to the escutcheon base with double faced adhesive tape Therefore applying hot air such as using a hair dryer is recommended for smoother removal 2 When installing the new membrane sheet make sure that the surface of escutcheon base is clean to prevent a malfunction or shorted contacts To remove dial Insert the ruler wrapped with a glove as a lever to release the dial 14 NN DF383B ...

Страница 15: ...use a soldering iron or desoldering tool of more than 30 watts on D P C contacts 2 With all the terminal pins cleaned and separated from D P C contacts remove the defective transformer power relays Replace components making sure all terminal pins are inserted completely resolder all terminal contacts carefully 4 5 Fan motor 1 Disconnect 2 lead wires from fan motor terminals 2 Remove 2 screws holdi...

Страница 16: ...on upper heaters from the cavity left side Then bend back locking tabs which holding heater to the right angle 4 Remove the heater by pulling it out from the cavity left side 4 7 Door assembly 1 Remove left and right door key springs from door arm with plier NOTE Support door before removing door springs To remove door C and door A 2 From the position of right hinge U 16 NN DF383B ...

Страница 17: ...djustment so as to prevent an excessive microwave leakage Adjustment of the door assembly Refer page 23 3 When mounting the door to the oven be sure to adjust the door parallel to the cavity front plate by moving hinges back or forward 4 Adjust so that the upper portion of the door will touch firmly to the oven cavity front plate without pushing the door If the door assembly is not mounted properl...

Страница 18: ...connecting the 2 lead wires reinstall the motor cover by rotating it around 180 tucking the 2 tabs under the base in the 2 provided slots then screw the single tab to the base using a screw 4 9 Lower Heater Heater AU 1 Remove left and right door key springs from door arm NOTE Support door before removing door springs 2 Disconnect connector of power supply cord 3 Turn over the microwave oven 4 Remo...

Страница 19: ...oven assy 8 Remove 4 screws holding lower heater panel on the bottom of oven cavity 9 Release the catch hook holding orifice and then remove the orifice 10 Remove 2 screws holding lead wire terminals on lower heaters 11 Take away the whole lower heater assembly 19 NN DF383B ...

Страница 20: ...12 Remove the lower heater 20 NN DF383B ...

Страница 21: ... Open 5 2 Short Switch 1 Unplug lead wires from Inverter Power Supply U primary terminals 2 Connect test probes of ohm meter to the disconnected leads that were connected to Inverter Power Supply U 3 Test the continuity of short switch with door opened and closed positions using lowest scale of the ohm meter Normal continuity readings should be as follows Door Opened Door Closed 0Ω Close Ω Open 5 ...

Страница 22: ...3 Plug in the oven s AC power supply cord into outlet 4 Program DPC a Press Timer Clock pad twice b Press Start pad once c Press Micro Power pad once 5 Program oven at High power for 1 minute and press Start pad a After approximately 3 seconds oven stops operating b During oven operation the input current is approximately 0 4A INPUT CURRENT FAILURE CODE Unplug CN701 0 4A Oven stops in 3 seconds af...

Страница 23: ...tion so that the oven door will not have any play in it Check for play in the door by pulling the door assembly Make sure that the latch keys move smoothly after adjustment is completed Completely tighten the screws holding the door hook assembly to the oven assembly 3 Reconnect the short switch and check the continuity of the monitor circuit and all latch switches again by following the component...

Страница 24: ...ill lower the magnetron output Take the temperature readings and heating time as accurately as possible 1 Fill the beaker with exactly one litre of tap water Stir the water using the thermometer and record the water s temperature recorded as T1 2 Place the beaker on the center of glass tray Set the oven for High power and heat it for exactly one minute 3 Stir the water again and read the temperatu...

Страница 25: ...this panel to discharge any static charge in your body 7 220 240V AC is present on the digital programmer circuit Terminals of power relay s and primary circuit of Digital Programmer Circuit When troubleshooting be cautious of possible electrical shock hazard Before troubleshooting operate the microwave oven following the correct operating procedures in the instruction manual in order to find the ...

Страница 26: ... pressing start pad H V Inverter U operates by the control signals from DPC but magnetron is not oscillating 1 2 Magnetron Loose lead wire connector CN703 Oven stops in 1 minute after pressing start pad Oven thermistor circuit is not functioning 1 2 Oven thermistor Loose wiring 2 No display and no operation at all Fuse is blown Most probably loose connection of connectors or door latch mechanism i...

Страница 27: ...ch switches 2 Open or loose connection of high voltage circuit especially magnetron filament circuit NOTE Large contact resistance will cause lower magnetron filament voltage and cause magnetron to have lower output and or be intermittent 3 Defective high voltage component H V Inverter Power Supply U Magnetron Check high voltage component according to component test procedure and replace if it is ...

Страница 28: ...97 H98 and H99 First you must program the DPC into TEST MODE press Timer Clock pad twice press Start pad once press Micro Power pad once Program unit for operation H95 H97 H98 H99 appears in display window a short time after Start pad is pressed and there is no microwave oscillation Alternate way to troubleshoot oven with AC Ampere meter used H95 H97 H98 H99 appears in display window a short time ...

Страница 29: ...5V RY2 Q222 No microwave oscillation at any power 1 IC1 pin 77 voltages while operation at high power Abnormal IC1 Normal 5V Step2 2 Collector of Q223 Abnormal Q223 and or Q225 Q226 Q227 Normal 0 7V RY1 Dark or unclear display 1 Replace display and check operation Normal Display Abnormal IC1 Missing or lighting of unnecessary segment 1 Replace IC1 and check operation Normal IC1 Abnormal Display H9...

Страница 30: ...procedure Power will Ammeter reading is To do Remedy Shut off in 23 seconds after Start 1 Between 0 5A and 1 0A Check and repair open magnetron circuit Open magnetron wiring between Inverter and magnetron terminal 2 Between 1 0A and 2 0A Check continuity of D702 in Inverter PCB 1 D702 shorted Replace H V Inverter F606YBA00QP F606YBA00HP 2 D702 is OK Replace magnetron Shut off in 3 seconds after St...

Страница 31: ...OR 1 0 1µF 1000VDC C702 ECWF4305N851 FILM CAPACITOR 1 3µF 250VDC DB701 B0FBBQ000006 RECTIFIER BRIDGE 1 L701 F5020W100AP CHOKE COIL 1 R702 D0CM562JA002 SAND BAR RESISTOR 1 T701 F609ABA00GP TRANSFORMER 1 INCLUDING D701 D702 C706 C707 D701 D702 B0FBAZ000003 DIODE 2 C706 F0C3F562A002 FILM CAPACITOR 1 5600PF 3KV C707 F0C3F822A002 FILM CAPACITOR 1 8200PF 3KV 31 NN DF383B ...

Страница 32: ...8 EXPLODED VIEW AND PARTS LIST 8 1 EXPLODED VIEW 32 NN DF383B ...

Страница 33: ...1 HPE YPQ MPQ YTE 28 F900CBG40TP AC CORD W PLUG 1 TPE 28 F900CBG30EP AC CORD W PLUG 1 TTE 28 F900CBG40FC AC CORD W PLUG 1 FCE 29 F6735BG00XP HEATER PROTECTOR 1 31 F630GBG00XP HEATER AU 1 HPE TPE TTE FCE YTE 31 F630GBG40YP HEATER AU 1 YPQ MPQ 32 F630HBG00XP HEATER BU 2 HPE TPE TTE FCE YTE 32 F630HBG40YP HEATER BU 2 YPQ MPQ 33 F6421BG00XP METAL BAR 1 34 F6460BG00XP HEATER BRACKET 1 35 F6180 1R40 MIC...

Страница 34: ...LABEL 1 HPE 67 F01509K90HP NO TOUCHING LABEL 1 68 F1221 1R40 CUSHION RUBBER 1 FOR CABINET BODY 70 F0334BG40HP MENU LABEL 1 HPE YPQ MPQ TPE YTE 70 F0334BG40TT MENU LABEL 1 TTE 70 F0334BG40FC MENU LABEL 1 FCE 71 F0157BG40BHP NAME PLATE 1 HPE 71 F0157BG40BYP NAME PLATE 1 YPQ 71 F0157BG40BMP NAME PLATE 1 MPQ 71 F0157BG40BTP NAME PLATE 1 TPE 71 F0007BG40BTT NAME PLATE 1 TTE 71 F0157BG40BFC NAME PLATE 1...

Страница 35: ...MPQ E1 F603LBG40TT D P CIRCUIT AU 1 TTE YTE E1 F603LBG40FC D P CIRCUIT AU 1 FCE E2 F603YBG40HP D P CIRCUIT DU 1 E4 F630YBG40KHP MEMBRANE SWITCH U 1 HPE YPQ MPQ TPE TTE YTE E4 F630YBG40KFC MEMBRANE SWITCH U 1 FCE E5 F8034BG30BEP ESCUTCHEON BASE A 1 E6 F8039BG30SEP DIAL 1 E7 F6613BG00XP BACKSTOP 1 E8 F8127BG00XP BACK PANEL 1 E9 F66167D00AP FLAT CABLE 1 E10 F62309W40HP FUSE 1 10A 35 NN DF383B ...

Страница 36: ... Pcs Set Remarks D2 F302ABG30BEP DOOR A U 1 D3 F3044 1R40 DOOR ARM RIGHT 1 D4 F3085BG00XP DOOR C 1 D5 J301PBG00XP DOOR E U 1 D7 F3044 1R40 DOOR ARM LEFT 1 49 F3231BG00XP DOOR KEY SPRING A 1 THIN ONE 50 F3230 1H50 DOOR KEY SPRING B 1 THICK ONE 36 NN DF383B ...

Страница 37: ...ef No Part No Part Name Description Pcs Set Remarks W1 F030ABG00XP LEAD WIRE HARNESS 1 INCLUDING OVEN THERMISTOR W2 F030E 1R40 H V LEAD WIRE 1 W4 F0353BG00XP LEAD WIRE HARNESS U 1 INCLUDING MAGNETRON THERMISTOR 37 NN DF383B ...

Страница 38: ...F0102BG40BFC PACKING CASE PAPER 1 FCE P3 F0104 1R40 UPPER FILLER 1 P4 F0105 1R40 LOWER FILLER 1 P5 F01067C50AP P E BAG 1 P6 F0603BG00XP ENAMEL SHELF 1 P7 F060VBG00XP OVEN RACK 1 P8 F0180 1P00 SHEET 1 P11 F0108BG00XP RACK PACKING 1 P13 F000BBG40HP COOK BOOK 1 EXCEPT FCE P18 F0445BG40BMP OVERLAY 1 YPQ MPQ P18 F0445BG40BTP OVERLAY 1 TPE P21 F0016BG40HP PRECAUTION 1 HPE YPQ MPQ TPE TTE YTE P21 F0016BG...

Страница 39: ...9 DIGITAL PROGRAMMER CIRCUIT 9 1 SCHEMATIC DIAGRAM 39 NN DF383B ...

Страница 40: ...40 NN DF383B ...

Страница 41: ...004A0038 CRYSTAL RESONATOR 1 8 0MHz D33 D4EAY5110002 VARISTOR 1 510V D2 D3 D4EAY112A036 VARISTOR 2 1100V IC1 MNBG4F31AAM L S I 1 IC26 MIP2K30MSSCF IC 1 IC27 IC28 B3PAA0000302 IC 2 IC300 B3PAC0000060 IC SSR 1 RY1 RY4 RY6 K6B1AYY00129 POWER RELAY 3 RY2 K6B1AYY00069 POWER RELAY 1 T10 G4DYA0000310 LOW VOLTAGE TRANSFORMER 1 RE81 EVEJ1HF2224M REVOLVING ENCODER 1 41 NN DF383B 04 13 S BG4 Printed in China...

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