Panasonic NN-GF574S Service Manual Download Page 33

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11.2. PARTS LIST

Ref. No.

Part No.

Part Name & Description

Pcs/Set

Remarks

BZ210

L0DDEA000014

BUZZER

2.0KHz

DISP110

L5AYAYY00291

LCD

F67529L60XP

DIFFUSION SHEET

DISP1 HOLDER

F66179L60XP

LCD HOLDER

VA1

D4EAY271A036

ZENER RESISTOR

270V

VA2,VA3

D4EAY112A036

ZENER RESISTOR

1100V

IC1

MN69F009KC1

L.S.I.

PC25

B3PAA0000302

IC10

C0DBGYY03746

IC25

C0DBBYY00073

RL1,RL3

K6B1AYY00129

POWER RELAY

T10

G4DYA0000680

LOW VOLTAGE TRANSFORMER

NN-GF574S / NN-GF574M

10/14
S-BN0
S-BN1
Printed in China

Summary of Contents for NN-GF574S

Page 1: ... Panasonic Appliances Microwave Oven Shanghai Co Ltd 2014 NN GF574S NN GF574M RPH MEXICO LATIN AMERICA Microwave Oven ORDER NO PAPMOSH1410034CE ...

Page 2: ...2 NN GF574S NN GF574M ...

Page 3: ...3 NN GF574S NN GF574M ...

Page 4: ...tor 15 7 COMPONENT TEST PROCEDURE 16 7 1 Primary Secondary Interlock Switch Power Relay RL1 16 7 2 Interlock monitor Switch 16 7 3 Magnetron 16 7 4 Inverter power supply U 17 7 5 Temperature thermistor 17 8 MEASUREMENTS AND ADJUSTMENTS 18 8 1 Adjustment of Primary interlock switch Secondary interlock switch and Short switch 18 8 2 Measurement of microwave output 18 9 TROUBLESHOOTING GUIDE 19 9 1 T...

Page 5: ...1 FEATURE CHART 2 CONTROL PANEL 5 NN GF574S NN GF574M ...

Page 6: ...3 SCHEMATIC DIAGRAM 6 NN GF574S NN GF574M ...

Page 7: ...o 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 4 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 the operating state in ...

Page 8: ...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 9: ... 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 holes or gaps because such objects may work as an antenna and cause microwave leakage 5 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 ...

Page 10: ...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 4 screws holding inverter reinforcement bracket A on right heater panel base plate respectively 5 Release locking tabs connecting inverter air guide with inverter bracket 6 Remove 1 screw holding H ...

Page 11: ...in an x pattern making sure there is no gap between the waveguide and the magnetron to prevent microwave leakage CAUTION When replacing the magnetron be sure the antenna gasket is in place 6 3 Digital programmer circuit D P C Membrane Switch 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 reinforcement bracket and escutcheo...

Page 12: ...e edge of membrane sheet and peel off escutcheon sheet key board membrane completely from escutcheon base NOTE a The membrane key board is attached to the escutcheon base with double faced adhesive tape Therefore applying hot air such as using a hair dryer is recommended for smoother removal b When installing the new key board membrane make sure that the surface of escutcheon base is clean to prev...

Page 13: ...ys NOTE Do not use a soldering iron or desoldering tool of more than 30 watts on D P C contacts B 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 6 5 Fan motor 1 Disconnect 2 lead wires from fan motor terminals 2 Remove...

Page 14: ...er than 10 4 Remove the door E from its hinges by pushing the door E upward and out 5 Remove door key and door key spring To re install components 1 Place the door s lower hinge pin into the bottom hinge hole 2 Use your left index finger to support the door s lower hinge pin while guiding the door s upper hinge pin into the top hinge hole 3 Lower your finger to seat the door onto the hinges 4 Repl...

Page 15: ... so that no sharp edges will be exposed to outside 2 Disconnect 2 lead wires connected to the stirrer motor 3 Remove the stirrer motor by removing screw NOTE After reinstalling the new stirrer motor and reconnecting 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 4mm 6mm scr...

Page 16: ... Primary Interlock Switch 0Ω Close Ω Open Secondary Interlock Switch 0Ω Close Ω Open Power Relay RL1 Ω Open Ω Open 7 2 Interlock monitor 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 interlock monitor switch with door opened and closed pos...

Page 17: ...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 after sta...

Page 18: ...tor circuit and all interlock switches again by following the component test procedures 8 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 thermome...

Page 19: ...ntrol panel Always touch ground while working on this panel to discharge any static charge in your body 7 120V 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...

Page 20: ... alignment of primary Interlock switch Adjust door and Interlock 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 compone...

Page 21: ...8 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 after...

Page 22: ... at high power Abnormal IC1 Normal 5V Step2 2 Collector of Q227 Abnormal Q222 and or Q225 Q227 Normal 0 7V RL1 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 H95 H97 H98 appears in window and oven stops operation Program High power for 1 minute and con...

Page 23: ...without going through this 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 F606Y9X90AP 2 D702 is OK Replace magnetron Shut off in 3 s...

Page 24: ...art Name Description Pcs Set Remarks DB701 B0FBCR000051 BRIDGE DIODE 1 25A 600V L701 F5020W100AP CHOKE COIL 1 Q701 B1JAGV000017 TRANSISTOR SI 1 1100V T701 F609A8X00AP H V TRANSFORMER 1 Including C706 C707 D701 D702 C701 F0C2H284A022 CAPACITOR 1 0 28µF 600VDC C702 F0C2E455A336 CAPACITOR 1 4 5µF 250VDC 24 NN GF574S NN GF574M ...

Page 25: ...10 EXPLODED VIEW AND PARTS LIST 10 1 EXPLODED VIEW 25 NN GF574S NN GF574M ...

Page 26: ...PRIMARY INTERLOCK SWITCH 23 F61415U30XN MICRO SWITCH 1 SECONDARY INTERLOCK SWITCH 24 F61459L00XP THERMAL CUTOUT 1 25 F61785U30XN MICRO SWITCH 1 INTERLOCK MONITOR SWITCH 26 2M261 M32KLP MAGNETRON 1 31 F62308F20AP FUSE 1 20A 32 F62315G10XN FUSE HOLDER 1 34 F61449Q30AP STIRRER MOTOR 1 35 F900C9Q30RP AC CORD W PLUG 1 36 F630GBN00KP HEATER 2 37 F6460BN00HP HEATER MOUNTING PLATE 2 38 F6735BN00HP HEATER ...

Page 27: ...H U 1 GF574S E4 F630YBN00BRP MEMBRANE SWITCH U 1 GF574M E5 F8034BN00SHP ESCUTCHEON BASE 1 E6 F891PBN60SRP DOOR OPENING BUTTON U 1 GF574S E6 F8072BN00SHP DOOR OPENING BUTTON 1 GF574M E7 F80375K00AP COOK BUTTON SPRING 1 E8 F82569M60BP DOOR OPENING LEVER 1 E9 F66139L60XP D P C BOARD SUPPORT 1 E10 F8127BN00HP GROUNDING PLATE 1 27 NN GF574S NN GF574M ...

Page 28: ...rt Name Description Pcs Set Remarks D1 F30186P40AG DOOR KEY A 1 D2 F302ABN10SRP DOOR A U 1 GF574S D2 F302ABN00SHP DOOR A U 1 GF574M D3 F301P9L30RE DOOR E U 1 D4 F30216P40AG DOOR KEY SPRING 1 D5 F30859Q30AP DOOR C 1 28 NN GF574S NN GF574M ...

Page 29: ...10 5 WIRING MATERIALS Ref No Part No Part Name Description Pcs Set Remarks W1 F030ABN00RP LEAD WIRE HARNESS 1 W2 F030E 1R90 H V LEAD WIRE 1 W3 F0353BN50QP THERMISTOR HARNESS 1 29 NN GF574S NN GF574M ...

Page 30: ...NSTRUCTION MANUAL 1 P2 F0102BN10SRP PACKING CASE PAPER 1 GF574S P2 F0102BN00SRP PACKING CASE PAPER 1 GF574M P3 F01049Q30AP UPPER FILLER 1 P4 F01059Q30AP LOWER FILLER 1 P5 F01067C50AP P E BAG 1 P6 F01078100XN DOOR SHEET 1 P7 F060VBG00XP OVEN RACK 1 P9 F01089L00XP RACK PACKING 1 30 NN GF574S NN GF574M ...

Page 31: ...11 DIGITAL PROGRAMMER CIRCUIT 11 1 SCHEMATIC DIAGRAM 31 NN GF574S NN GF574M ...

Page 32: ...32 NN GF574S NN GF574M ...

Page 33: ...HEET 1 DISP1 HOLDER F66179L60XP LCD HOLDER 1 VA1 D4EAY271A036 ZENER RESISTOR 1 270V VA2 VA3 D4EAY112A036 ZENER RESISTOR 2 1100V IC1 MN69F009KC1 L S I 1 PC25 B3PAA0000302 IC 1 IC10 C0DBGYY03746 IC 1 IC25 C0DBBYY00073 IC 1 RL1 RL3 K6B1AYY00129 POWER RELAY 2 T10 G4DYA0000680 LOW VOLTAGE TRANSFORMER 1 33 NN GF574S NN GF574M 10 14 S BN0 S BN1 Printed in China ...

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