Panasonic NN-ST65JB Service Manual Download Page 25

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8.3. ESCUTCHEON BASE ASSEMBLY

Ref. No.

Part No.

Part Name & Description

Pcs/Set

Remarks

F603LCA20HP

D.P.CIRCUIT (AU)

ST65JM HPE

F603LCA20MP

D.P.CIRCUIT (AU)

ST65JB YPQ/MPQ

F603LCA20YU

D.P.CIRCUIT (AU)

ST65JB YUE

F603LCA20TP

D.P.CIRCUIT (AU)

ST65JB TPE

F8034CA20SHP

ESCUTCHEON BASE

ST65JM

F8034CA20BMP

ESCUTCHEON BASE

ST65JB

F8072CA20SHP

DOOR OPENING BUTTON

ST65JM

F8072CA20BMP

DOOR OPENING BUTTON

ST65JB

F630YCA20BHP

MEMBRANE SWITCH (U)

ST65JM HPE

F630YCA20BMP

MEMBRANE SWITCH (U)

ST65JB YPQ/MPQ/TPE

F630YCA20BYU

MEMBRANE SWITCH (U)

ST65JB YUE

F82569Y00AP

DOOR OPENING LEVER

F80375K00AP

COOK BUTTON SPRING

E10

F8284CA00QP

CUSHION RUBBER

NN-ST65JM / NN-ST65JB

Summary of Contents for NN-ST65JB

Page 1: ... Panasonic Appliances Microwave Oven Shanghai Co Ltd 2018 NN ST65JM NN ST65JB HPE Hong Kong YPQ Singapore MPQ Malaysia TPE Thailand YUE Vietnam Microwave Oven ORDER NO PAPMOSH1806020CE ...

Page 2: ...2 NN ST65JM NN ST65JB ...

Page 3: ...3 NN ST65JM NN ST65JB ...

Page 4: ...atch Switch interlocks Power Relay RL1 14 5 2 Short Switch 14 5 3 Magnetron 14 5 4 key board membrane Membrane switch assembly 14 5 5 Inverter power supply U 15 6 MEASUREMENTS AND ADJUSTMENTS 16 6 1 Adjustment of primary latch switch secondary latch switch and short switch 16 6 2 Measurement of microwave output 16 7 TROUBLESHOOTING GUIDE 17 7 1 Troubleshooting Oven stops operation during cooking 1...

Page 5: ...1 SCHEMATIC DIAGRAM 5 NN ST65JM NN ST65JB ...

Page 6: ...rmer to increase voltage up to 2 000V AC 4 Then the half wave doubler voltage rectifier circuit consisting of the H V diodes and capacitors generates the necessary 4 000V DC needed for the magnetron 5 Output power of the magnetron tube is always monitored by the signal output from the current transformer built into the inverter circuit 6 This signal is fed back to the microcomputer in the DPC to d...

Page 7: ...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 chassis If the inverter ...

Page 8: ...nit 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 properly ti...

Page 9: ...n your body before handling the DPC 1 Disconnect connector CN701 on H V Inverter board 2 Remove 1 screw holding escutcheon base and slide the escutcheon base upward slightly 3 Remove all screws holding D P C board on escutcheon base 4 Separate D P C board from tabs on the escutcheon base and remove D P C board To replace membrane key board 5 Use tools such as kinfe etc to lift the edge of escutche...

Page 10: ...nal pins are inserted completely resolder all terminal contacts carefully 4 4 Fan motor 1 Disconnect 2 lead wires from fan motor terminals 2 Remove 2 screws at location on oven attaching orifice assembly 3 Remove orifice assembly from oven assembly 4 Remove fan blade from the fan motor shaft by pulling it straight out 5 Remove 2 screws holding fan motor to orifice 4 5 Door assembly 1 Support the d...

Page 11: ... slot Then lower your finger to seat the door onto the hinge NOTE Door alignment is crucial If door is misaligned apply pressure until alignment is achieved NOTE 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 properly microwave power may leak from the clearance between the door and oven 9 Ti...

Page 12: ...lots then screw the single tab to the base using a 4mm 6mm screw 4 7 Inverter power supply CAUTIONS 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 sin...

Page 13: ...w holding H V Inverter to Inverter bracket 7 Remove 1 screw holding grounding plate to H V Inverter 8 Seperate H V Inverter from Inverter bracket by freeing 3 catch hooks on the Inverter bracket 13 NN ST65JM NN ST65JB ...

Page 14: ... 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 3 Mag...

Page 15: ...ter approximately 23 seconds oven stops operating b During oven operation the input current is approximately 0 5 to 1A If both a and b are OK proceed to test 2 INPUT CURRENT FAILURE CODE Unplug CN703 0 5 to 1A Oven stops in 23 seconds after started Test 2 Continued from Test 1 1 Unplug the oven s AC power supply cord from outlet 2 Unplug 3 pin connector CN701 CN703 remains unplugged 3 Plug in the ...

Page 16: ...ches again by following the component test procedures 6 2 Measurement of microwave output The output power of the 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 stopwatch NOTE ...

Page 17: ...s control panel Always touch ground while working on 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 proce...

Page 18: ...ment of primary latch switch Adjust door and latch 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 t...

Page 19: ...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 button 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 afte...

Page 20: ... 1 minute and conduct following test quickly unless H95 H97 H98 appears and oven stops 1 Unplug CN702 2 pin connector and measure voltage between terminals Abnormal 0V 1 Interlock Switch 2 D P C Power Relay Normal 220 240V Step2 2 Unplug CN701 3 pin connector and measure pin1 voltage Abnormal 0V D P C Approx AC 3V Magnetron 7 5 Simple way of H V Inverter magnetron troubleshooting Purpose Simple wa...

Page 21: ...4JA FILM CAPACITOR 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 21 NN ST65JM NN ST65JB ...

Page 22: ...8 EXPLODED VIEW AND PARTS LIST 8 1 EXPLODED VIEW 22 NN ST65JM NN ST65JB ...

Page 23: ...MARY LATCH SWITCH 27 F61415U30XN MICRO SWITCH 1 SECONDARY LATCH SWITCH 28 F61459V00XP THERMAL CUTOUT 1 29 F612ECA00QP LAMP U 1 LED LAMP INSIDE 30 F61785U30XN MICRO SWITCH 1 SHORT SWITCH 31 F606YBA00HP H V INVERTER U 1 32 2M261 M39R MAGNETRON 1 33 F62309W40HP FUSE 1 34 F62319V00XP FUSE HOLDER 1 35 F66629Y00AP GROUNDING PLATE 1 36 F6326BB80XP TURNTABLE MOTOR 1 37 F900C9Y10KT AC CORD W PLUG 1 HPE YPQ...

Page 24: ...Ref No Part No Part Name Description Pcs Set Remarks 65 F6614CA00QP SUPPORT RUBBER NAIL 1 HPE 24 NN ST65JM NN ST65JB ...

Page 25: ...B TPE E3 F8034CA20SHP ESCUTCHEON BASE 1 ST65JM E3 F8034CA20BMP ESCUTCHEON BASE 1 ST65JB E4 F8072CA20SHP DOOR OPENING BUTTON 1 ST65JM E4 F8072CA20BMP DOOR OPENING BUTTON 1 ST65JB E5 F630YCA20BHP MEMBRANE SWITCH U 1 ST65JM HPE E5 F630YCA20BMP MEMBRANE SWITCH U 1 ST65JB YPQ MPQ TPE E5 F630YCA20BYU MEMBRANE SWITCH U 1 ST65JB YUE E6 F82569Y00AP DOOR OPENING LEVER 1 E7 F80375K00AP COOK BUTTON SPRING 1 E...

Page 26: ...ion Pcs Set Remarks D1 F30189Y00AP DOOR KEY A 1 D2 F302ACA20SHP DOOR A U 1 ST65JM D2 F302ACA20BMP DOOR A U 1 ST65JB D3 F302K9X70EP DOOR E U 1 D4 F30215G10XN DOOR KEY SPRING 1 D5 F30859Y00AP DOOR C 1 D6 F31459Y00AP DOOR SCREEN A 1 26 NN ST65JM NN ST65JB ...

Page 27: ...8 5 WIRING MATERIALS Ref No Part No Part Name Description Pcs Set Remarks W1 F030ACA20HP LEAD WIRE HARNESS 1 INCLUDING MAGNETRON THERMISTOR W2 F030ECA20HP H V LEAD WIRE 1 27 NN ST65JM NN ST65JB ...

Page 28: ...ING CASE PAPER 1 HPE P2 F0102CA20BMP PACKING CASE PAPER 1 YPQ MPQ YUE TPE P3 F0104BT00QP UPPER FILLER 1 P4 F0105BT00QP LOWER FILLER 1 P5 F01067F00AP P E BAG 1 P8 F06015Q00AP COOKING TRAY 1 P10 F000BCA20MP COOKING BOOK 1 P11 F0445CA20MP OVERLAY 1 ST65JB YPQ MPQ P11 F0445CA20TP OVERLAY 1 ST65JB TPE P19 F9164 6S10D EARTH LEAD 1 TPE P20 F00324040XN EARTH CAUTION LABEL 1 TPE 28 NN ST65JM NN ST65JB ...

Page 29: ...9 DIGITAL PROGRAMMER CIRCUIT 9 1 SCHEMATIC DIAGRAM 29 NN ST65JM NN ST65JB ...

Page 30: ...30 NN ST65JM NN ST65JB ...

Page 31: ...5E20XN DIFFUSION SHEET 1 VA1 D4EAY5110002 VARISTOR 1 270V VA2 VA3 D4EAY112A036 VARISTOR 2 1100V IC1 MNCA0F50ABH L S I 1 IC10 C0DBGYY05981 IC 1 VOLTAGE STABILIZED IC25 C0DAZYY00049 IC 1 PC25 PC26 B3PAA0000302 IC 2 RL1 K6B1AYY00129 POWER RELAY 1 T10 G4DYA0000910 LOW VOLTAGE TRANSFORMER 1 FUSE1 K5G402YA0159 FUSE 1 4A 250V 31 NN ST65JM NN ST65JB 06 18 S CA2 Printed in China ...

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