Service Manual - Page de test
Contents
1. 28 DIGITAL PROGRAMMER CIRCUIT 5115 4 22 4 2 1 1 enne u 30 FEATURE CHART FEATURES Microwave 6 Grill 3 Combination 3x3 Weight Defrost 3 Weight Combination 3 Stage Cooking 3 stage Delay Stand Yes Clock 12 Hrs Word Prompt English 1 ONO OS 13 CONTROL PANELS Display Window Time Pads Auto Weight Combination Programs Auto Weight Defrost Programs Microwave Power Settings Grill Settings Combination Pad Delay Stand Pad This can be used to delay a cooking program for up to 9 hrs 99 mins or used to time or for standing non cooking time 1 1 Pizza Clock Pad min min Press the clock pad Using the minute and 2 second pads set the clock 12 hr clock 1 1 Press clock pad again to stop colons flashing sac SEC Jackel Pointoes 3 Ib oz Conversion Pad Weight Selection Pads Stop Cancel Button 5 Frozen Chips Before Cooking Mico MA One press clears your instructions During Cooking One press temporarily stops the cooking program Another press cancels all your M instructions and the time of dav will appear 5 Les r the display Start Button Press to start operating the oven If during cooking the door is opened or Stop Cancel 6 Gril 1 2 4 4 Button is pressed once Start Button has to ju y 4 be pressed again to continue cooking2. INTO VREF vss AVSS ANG P67 J D E CN5 CNS R N D ECN17 195 ECN17 19R A20 Tps5 E603Y4L20BP bl Lr sp mms 1 CN4 1 10 C21 1K C1 ECN20 7WO55H EX AC DC 12V 103 C1 e OV DT I a GBN_JG_ 12v S o ee 95 1 gt i 582 15 D mE a 8 Ai OLS RY3 i 1 E ar o fia i GBN JQ 12V ag mE 7 mH 1 gt 1 ul D26 25 l S1WBA6OB Z PS2501 104 C1 l 1100VEX 55 Re7 M 1100VEX 50 5W SE i OV PWMO D220 4N4 148M i R460 33K Ci 1 i A H o l z st z 103 C14 4 L 4 m NI xq DOOR RAM zig QAL ES SWITCH O3 agp olz i 27 i oF t ii 1 1 1 IMEEM A 0221 752 D224 9 8 gt gt K 4NA4148M tahha TP413 m m amp 2 8 H amp 4 Z I T ING 9 e mau j RY4 Be g G5G 12V GBG 12V jt 17 05 at d ogee 9 7
3. 30 NOTES 31 NOTES GO S 4L20BP Printed in the UK 32
4. SYMPTOMS CAUSE CORRECTIONS 9 Loud buzzing noise can be heard 1 Loose fan and fan motor 10 Turntable motor does not rotate 1 Open or loose wiring of turntable motor 2 Defective turntable motor 11 Oven stops operation during cooking 1 Open or loose wiring of primary and Adjust door and latch switches secondary latch switch 2 Operation of thermal cutout Magnetron Troubleshooting of Inverter Circuit U and Magnetron NEW H V Oven shuts down after approximately 15 or 33 seconds If the microwave oven shuts down after a short time in micropower mode conduct the following test The microwave oven must be set in test mode to activate the self diagnostic failure code system SELF TEST MODE DELAY o ET m pov DISPLAV 4L20BP When oven is set in test mode place water load in oven set micropower to high and time to 1 minute press start H97 H98 appears in displav window a short time after start kev is pressed and there is no microwave oscillation H97 H98 appears in the displav window Check magnetron filament continuitv DANGER HIGH VOLTAGE Open p test procedu OK refer to component Magnetron res Check Inverter input AC voltages at CN702 DPC board Power Relay Loose relay wiring Latch switch AC 240V unplug CN702 and measure at lead wire harness side
5. Check the grounding oerte rr eA De a b Pe dee tpi pe ede Qe pce ec ped ona 10 5 2 cB UNSER 10 5 3 When parts must be replaced remove the power plug from the 11 5 4 When the 10A fuse is blown due to the operation of short 11 5 5 Avoid inserting nails wire etc through any holes in the unit during operation md 5 6 Contirmiatter ende Hn eiim rea 11 Sharp lS me ELE 11 DISASSEMBLY AND PARTS REPLACEMENT 0 rna nnns rna nnns nnns 12 6 1 Magnelroan s usa n n Sul aa Fa cel a a a a A er a 12 6 2 Inverter Power Supply lJ 2 2 i b a i ai 12 6 3 Digital Programmer Circuit DPC and membrane key board 6 4 Low voltage transformer and or power relays RY1 sese nennen 13 6 51 cio ete a utuku reser oad dre i a i 13 6 6 Temp sensor thermal protector aiia itecto reset deco eae d andi eda aaa ayasa 13 6 7 Door disassembly 2 6 rerom en rond deo Ere eire o 14 6 8 Turntablemotof REESE 14 6 9 Quartz u u nte teta eee pe a d ss re exe Dr Ae b Sea 14 COMPONENT TEST PROCEDURE 2 eorr eb ka a a ein a cups saus a es 15 7 1 Primary Latch Switch Secondary Secondary Latch
6. SHEET e ERN Dees og 808 Ir Ir 6 4 Low voltage transformer and or power relavs RV1 NOTE Be sure to ground any static electric charge built up on your body before handling the DPC 1 Using solder wick or a desoldering tool and 30W soldering iron carefully remove all solder from the terminal pins of the low voltage transformer and or power relays NOTE Do not use a soldering iron or desoldering tool of more than 30 watts on DPC contacts 2 With all the terminal pins cleaned and separated from DPC contacts remove the defective transformer power relays and install new transformer power relays making sure all terminal pins are inserted completely Resolder all terminal contacts carefully 13 6 5 Fan Motor Remove 2 screws and remove tie bar Disconnect 2 lead wires from fan motor terminals Disconnect all lead wires from noise filter Remove the noise filter Remove 4 screws holding fan motor and upper and lower orifice Detach the orifice assembly with fan motor from oven assembly 6 Remove fan blade from the fan motor shaft by pulling it straight out Qr com REMOVE 4 SCREWS ORIFICE UPPER a P FAN BLADE FAN MOTOR ORIFICE LOWER 01 024 6 6 Temp sensor thermal protector 1 Replace the temperature sensor by replacing the leadwire harness B as a complete unit Disconnect screw holding temperature sensor to chasis Dis
7. P P84 0 t t Smaak SWEOt 556 5460 22 F L a u PSSIDI t 1 RATS sweat 23 G M R Peen 1 t SWABX sweet SWE 24 H A N A 5 4 w D 1 7 sweat ES 5463 25 I a T x Pao D al SWAT SW54 Se Ss Sg Se G4 G G4 92 9 Ge e 9695 EES meer START we xe NS VS Me we OTT OT By m AT orp efir cfi of o e o o o e o e o el 3 818161 9 S eee 6 6 S SN SS SS S S S S NS Mi i 4 d Udo d dL dE Do dn C U UC O UC CO GG B coma 6 28 cove c 39 62 32 TP G 22 27 DISP110 30 29 28 27 HLCAJO CiA __ __ SEGB ABE SEGS 1P5 SEG2S 1 51 S26A 9 sec7 57 SEG7 TPS SEG2B 2 S2A S25A t a Pe 5668 7 SEG27 363 S24A 24 scco A S see 4 TPS secas 4 S4A osi 7 NDA sEc1o A D4 seio Sees 55 S384 FS A E3 8811 Stee4 amp c RA i all 2 86812 11 55823 7 S20A 27 20 14 9 13 A 51 sEG22 B 4 G M IR v SEG13 A elon 5135 gal 21 08 00 6 gasaj AIO 56644 TP13 SEGPA 959 S1BA 3 H S TW z JAB VET 4 seGis A 29 56515 g TP 14 SEG20 1015104 SIJA z dal tall 16 48 56616 3 TP15 SEGIS 118444 S16A 30 23 171 12 8 9 3 SEG17 AL SEG17 11916 SEG18 12 S12A S15A 1 n m se isa 46 56518 p 17 SEG17 13 SAh secto a45
8. 9 TROUBLESHOOTING GUIDE 93 01 To CAUTION DO NOT try to REPAIR this H V Inverter power supply U Replace as whole H V Inverter U Unit When returning H V Inverter U make sure to pack as originally packed DO NOT RE ADJUST PRESET VOLUME on the H V Inverter U It is very dangerous to repair or adjust without sufficient test equipment because this circuit handles very large current with very high voltage Ensure proper grounding before checking for trouble Be careful of the high voltage circuitry taking necessary precautions when troubleshooting Discharge the high voltage that remains in the Inverter U When checking the continuity of the switches or the H V Inverter disconnect one lead wire from these parts and then check continuity with the AC plug removed To do otherwise may result in a false reading or damage to your meter When disconnecting a plastic connector from a terminal you must hold the plastic connector instead of the lead wire and then disconnect it otherwise lead wire may be open or the connector cannot be removed Do not touch any parts of the circuitry on the digital programmer circuit since static electric discharge may damage this control panel Ensure you are touching the ground while working on this panel to discharge any static charge in your body 240VAC is present on the digital programmer circuit Terminals of power relay s and primary circuit of low voltage transformer When troubleshooting be ca
9. Check Inverter control signal at CN701 pin 1 and 2 ov DPC board Approx AC unplug CN701 and measure at lead wire harness side v H V Inverter U NOTE 19 NOTE DO NOT try to REPAIR this Inverter Power Supply U and also DO NOT RE ADJUST PRESET VOLUME on the board It is very dangerous to repair or adjust without sufficient test equipment because this circuit handles very high voltage and very large current Off alignment of inverter board operation is dangerous Operating a misaligned Inverter circuit is dangerous due to the very high voltage and current that is produced by this board Defective boards must be replaced with a new one Check magnetron filament for open or short to casing before proceeding to determine a good magnetron Alternative way to troubleshooting oven with AC Ampare meter used NEW H V Oven shuts down after approximatelv 15 or 33 seconds If the microwave oven shuts down after a short time in micropower mode conduct the following test The microwave oven must be set in test mode to activate the self diagnostic failure code svstem SELF TEST MODE DISPLAV DELAV E rower 4L20BP When oven is set in test mode place water load in oven set micropower to high and time to 1 minute press start H97 H98 appears in display window a short time after start key is pressed an
10. emiz 1 i i 0 IC220 CIRCUIT BOG grece ANG6747 8 4 Tey 6 a RESET 221 x tul R314 2 R PROTECTI 186 A 5 w 5 Xl IPROTECTI 800 28 7 PROTECT p VE CIRCUIT g M3BC34 E603L4L20BP sour CE sc k DF I JPRA I JPRA 80 1 8 40mmPitch Ne E o Ke Pes EZ R340 in341 R342 in343 10K C131 10K C17 10K C13 10K C1 ov ov OV c 89 0 8 Ea 19 PBBJD t T Swart 20 D J P65 DI 1 Y SWA2t swast Sweet 24
11. 7 Combination a nli 10 a dn a 9 12 13 Stop Cancel Start HHI Beep Sound A beep sounds when a button is pressed If this beep does not sound the setting is incorrect When the oven changes from one function to another two beeps sound After completion of cooking five beeps sound 2 OPERATION AND DIGITAL PROGRAMMER CIRCUIT TEST PROCEDURE Operation guide on the display To assist in programming the next operation will appear on the display When you are used to operating the oven you can turn the operating guide off To turn off To turn on Press 3 times Press 3 times delay OPERATING GUIDE OFF delay OPERATING GUIDE stand stand 1 SET CLOCK OPERATION DISPLAY OPERATION DISPLAY 6 Press start pad 1 Plug the power supply cord WELCOME TO PANASONIC REFER 7 5 into the wall outlet TO OPERATING INSTRUCTIONS Start amp SEC 2 Press clock pad 7 When 1st stage cooking has SET TIME elapsed oven automatically f Clock switches to 2nd stage ta 1 00 MIN SEC 3 Enter time of day 8 When 2nd stage cooking has Once 79 1 _ 11 25 elapsed oven beeps 5 times ENJOY YOUR MEAL fila BAT and shuts off Twice 19 1 5 Times PRESS CLOCK SIE 3 AUTO WEIGHT DEFROST 4 Press clock OPERATION DISPLAY 1 Select desired program Clock 11 25 MEAT ITEMS gt SET WEIGHT 2 MICROW
12. plugged in Open NOTE Shorted Circuit of ZNR L V T Oven Lamp etc Replace DPC 2 IC10 Pin 9 Abnormal OV JIC10 Oven fe uas 12V line Normal 12V gt Siep3 3 IC 1 Pin 16 voltage Abnormal ZD10 Q10 Ribbon Cable Emitter of Q10 Normal 5 gt Step4 4 1 pin 10 voltage Abnormal IC 220 15 pin of IC220 Norma IC 1 CX1 NOTE Procedure of fuse pattern repairing is as follows 1 When the fuse pattern PF2 opens 1 Remove the jumper wire PF3 2 Insert the removed jumper wire to PF2 position and solder it If both PF2 and fuse patterns are open please replace DPC NOTE At the time of these repairs make visual inspection of the varistor for burning damage and examine the transformer with tester for the presence of layer short circuit check primary coil resistance If any abnormal condition is detected replace the defective parts SYMPTOM STEP CHECK RESULT CAUSE CORRECTIONS No key input 1 Push button switch Abnormal Push button switch Norma IC 1 No beep sound 1 IC 1 pin 8 voltage Abnormal IC 1 Norma 1C220 BZ310 Power relay A RY 2 does not turn on even 1 1 pin 11 voltage while operation Abnormal IC 1 though the program has been set and the Normal 5V Step2 start pad is tapped 2 Short circuit between pin 6 and pin Still not turn on RY 2 16 of IC 2 RY 2 turns on 220 No micr
13. 1 25 E65854L00GS INVERTER SUPPORT BRACKET 1 26 E606Y4L10GP INVERTER 1 27 E10014L00GS BASE PLATE 1 28 E10614L00GS WATER SHEILD 1 29 E1008 1180 RUBBER FOOT 4 30 11004100 OUTER PANEL 1 31 E63268960JP TURNTABLE MOTOR 1 32 AEE2177 F80 PULLEY SHAFT WASHER 1 33 E21315540AP PULLEY SHAFT 1 34 007410005 LOWER HINGE 1 35 E09020000UK CUSHION 1 36 E01507550BP WARNING LABEL 1 37 2055410005 COVERA 1 38 XT4 W5V SCREW 1 H1 TORQUE FOR COVER A 39 E200A4L50GS OVEN CAVITY 1 40 030 410005 LEADWIRE HARNESS 1 INC THERMISTOR 41 E64924L50GS LEFT HEATER BRACKET 1 42 E03596540GP GRILL LINK 1 43 E22784L50GS UPPER HEATER PANEL 1 44 E630G7550GP GRILL HEATER 1 45 E40244N30BP EXHAUST GUIDE 1 46 E64604L50GS RIGHT HEATER BRACKET 1 47 E00064080BP WARNING LABEL 1 48 E11406520GP STOPPER A 2 49 E66224L50GS OUTER PANEL SPACER 1 23 12 DOOR ASSEMBLV D7 D6 Ref No Part No Part Name amp Description Pcs Set Remarks D1 E302A4L20HBP DOOR A SCREEN B ASSEMBLY 1 D2 E30214000AP DOOR KEY SPRING 1 D3 E30184L00GS DOOR KEY A 1 D4 E302K4L00GS DOOR E AND SCREEN A UNIT 1 D5 E31454L00GS SCREEN A 1 D6 085410005 DOOR C 1 D7 E30064L00GS UPPER HINGE 1 NOTE When ordering any door component also order door C as this part may become damaged during disassembly 24 13 ESCUTCHEON BASE ASSEMBLV Ref No Part No Part Name 8 Descri
14. GROUNDING BRACKET Q PULL HOW TO DISCONNECT SPECIAL LOCK CONNECTOR PRESS THIS LEVER LOCKING LEVER 05 007M 6 3 Digital Programmer Circuit DPC and membrane kev board NOTE Be sure to ground anv static electric charge built up on vour bodv before handling the DPC 1 Disconnect all connectors from D P C 2 Remove 2 screws holding escutcheon base and slide the escutcheon base upward slightiv Remove 1 screw holding earth wire to the chassis Release flat cable Remove 6 screws holding DPC DU Remove door lever Remove 6 screws holding DPC AU To replace membrane kev board 8 Remove escutcheon bracket from escutcheon base bv freeing 4 catch hooks on the escutcheon base 9 Remove displav window 10 Remove membrane assembly by pushing away from base NOTE 1 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 2 When installing new membrane key board make sure that the surface of escutcheon base is cleaned sufficiently so that any problems shorted contacts or uneven surface can be avoided ESCUTCHEON BASE YI i 6 G lt A t4 e TIE E S 4 64m MEMBRANE 9 o 11 KEY BOARD e mo oe ESCUTCHEON
15. Primary Latch Switch co Q open 0 Q close Secondary Latch Switch co Q open 0 Q close Power Relay B co Q open Q close 7 2 Short Switch amp Monitor Circuit 1 Unplug lead wires from H V Inverter primary terminals 2 Connect test probes of ohm meter to the disconnected leads which were connected to H V Inverter 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 00 ANTENNA ANTENNA COOLING FIN GASKET MAGNETRON 00 10 CASE RXI SCALE HIGHEST OHM SCALE TERMINALS 04 031M 15 7 3 Magnetron Continuitv checks can onlv indicate an open filament or a shorted magnetron To diagnose for an open filament or shorted magnetron 1 2 3 Isolate magnetron from the circuit bv disconnecting the leads A continuitv check across magnetron filament terminals should indicate one ohm or less A continuitv check between each filament terminal and magnetron case should read open 7 4 Push button key board Check continuity between switch terminals by tapping an appropriate pad on the key board The contacts assignment of the respective pads on the key board is as shown in digital programmer circuit schematic 7 5 Inverter Power Supply U DO NOT try to REPAIR this H V Invert
16. Switch and Power Relay B Interlocks 15 7 2 Short Switch amp Monitor Circuit a etre ed e peer ripeto ede ore ve au peras 15 753 si ia iii ii ii EE 15 7 4 Push button key board esis u SS ananpi aswaa ree Fere dec mri A Sa 15 7 5 nverter Power Supply isien ihostasi teret na ep erg dite rei pee aa ana dp itd aap pu s ea 16 7 6 Inverter Power supply U ssp tr rtr tre Sogni Yet 16 7 7 Temp sensor Thermal protector ss sssrenensenesnzknnnanzonenmnnnzamenazzzonintnnastknanzkintzzndnziemtaizkkemasneteizzzonoetansnza 16 MEASUREMENTS AND ADJUSTMENTS crece eiue aaa inrer nane nnn rn nass mass mand mass nua sm sm 17 8 1 Installation of Primary latch switch Secondary latch switch and Short switch 17 8 2 Measurement of microwave oulput ann tn 17 TROUBLESHOOTING GUIDE 18 EXPLODED VIEW AND PARTS LIST crier uu etaren niade MORO Inst 22 PARTS LISTS RG R 23 eje d tid a 24 ESCUTCHEON BASE ASSEMBLY ge aaa e b nc cune sm cruore are 25 PACKING AND ACCESSORIES DIGITAL PROGRAMMER CIRCUIT
17. eet 44 56520 jTP19 SEG21 AK SEG21 3 1220 SEG22 Ae SEG22 21 157 41 seges TP22 SEG 3A 60314120 NN V359 0 56524 TPe3 Bien S 4L2BP SEG25 PPS 56625 TPe4 TLGE260 U J603LAL20BP 38 seems jTPe5 No 37 SEG27 3 1226 0181 Sree 27 Ww D seGzajppe 1 008 QIPEZ seceo p 3S p TP28 Dies sEc30 p 24 56530 T cE260 SW40 42 8 33 52531 Sweats Yes SW53 63 360 l p o P S4 n 5mmPitcn G M N H VL3 n R S Ej en RESO 100K C1 B igo AUTO W DEP 29 16 DIGITAL PROGRAMMER CIRCUIT PARTS LIST DPC AU E603L4L20BP Ref No Part No Description Qty Remarks CN6 AEEM19FESVKN 19PIN CONNECTOR 1 DISP110 AEDDHLC4L2BP LCD 1 IC220 AN6747B CUSTOM IC 1 D180 D182 AESQTLGE260T GREEN LED 3 CX320 0 8004 4 CERAMIC RESONATOR 1 SW40 42 EVQ11L05R PUSH SWITCH 20 SW44 48 SW51 SW53 63 R182 ERDS2TJ361T RESISTOR 1 3600 R314 ERDS2TJ181T RESISTOR 1 1800 C22 AECF50F104Z CAPACITOR 1 100 nF D40 41 AESS1N4148M DIODE 2 IC1 AEIC8C34A119 IC1 1 C21 C40 C48 AECU1F103Z50 CHIP CAPACITOR 12 10 nF C110 C460 C20 C220 C222 AEC
18. products for following markets When troubleshooting or replacing parts please refer to the country identifications shown below for your applicable product specification BPQ for the United Kingdom DANGER OF HIGH VOLTAGE AND HIGH TEMPERATURE HOT LIVE OF THE INVERTER POWER SUPPLY U INVERTER WARNING This Inverter board looks like a regular PCB however this PCB drives the magnetron tube with extremely high voltage and high current ITHAS 1 Very high voltage and high current circuit It functions the same as the high voltage transformer and high voltage capacitor in ordinary microwave ovens 2 aluminium heat sink is very hot in high voltages and heat energy 3 Very high voltage may remain in the circuitry even when the oven is off High voltages may remain in the capacitors on the board DO NOT 1 Do not touch the circuitry as it becomes very hot high voltage Even when replacing board extreme care should be taken to avoid possible electric shock hazards High voltage may remain in the circuit 2 Do not touch aluminium heat sink because it is very hot in high voltage and also very hot in high heat energy 8 Do not try to repair the Inverter PCB as this can be very dangerous Replace the whole High Voltage Inverter Circuit U unit and return fully re packed with the original shopping box and shipping materials 4 Do not try to adjust or tamper with the preset volume on the Inverter board because it is very dangerous to adjust it
19. that no sharp edge will expose to outside 2 Disconnect 2 lead wires connected to the turntable motor 3 Remove the turntable motor by removing 2 screws NOTE To reinstall the motor cover use 4x6 screw 14 TURNTABLE MOTOR 6 9 Quartz heater 1 Disconnect lead wires from heater terminals 2 Remove 1 screw holding heater supports 3 Remove the heater HEATER SUPPORT 04 043M HEATER c x 04 041M SCREW BASE MOTOR COVER 7 COMPONENT TEST PROCEDURE CAUTION JNEW H V 1 High voltage is present at the high voltage terminal of the High Voltage Inverter U including aluminium heat sink during any cook cycle 2 It is neither necessary nor measurement of the high voltage 3 Before touching any oven components or wiring always unplug the oven from its power source and discharge the high voltage capacitors advisable to attempt 7 1 Primary Latch Switch Secondary Secondary Latch Switch and Power Relay B Interlocks 1 Unplug the lead connectors to Power Relay B and verify continuity of the power relay B 1 2 terminals 2 Unplug lead connectors to Primary Latch Switch and Secondary Latch Switch 3 Test the continuity of switches at door opened and closed positions with ohm meter low scale Normal continuity readings should be as follows Door Opened Door Closed
20. voltage and very high current for the magnetron tube Though it is free from danger in ordinary use extreme care should be taken during repair As you can see it looks like a TV flyback transformer however the current is extremely large and so danger exists by its high current and high voltages The aluminium heat sink is also energized with high voltage HOT so do not touch when AC input terminal is connected to the power devices Collector is directly connected to the Aluminium heat sink The Aluminium heat sink may be HOT by heat energy there fore extreme care should be taken during servicing and replacing Check the grounding DANGER OF HIGH VOLTAGE AND HIGH TEMPERATURE HOT LIVE OF HEAT SINK HEAT SINK CAPACITORS CHOKE COIL SAND BAR RESISTOR E 3 HIGH VOLTAGE TRANSFORMER ss PRIMARY CUSTOM L C WINDINGS PHOTO Qal HIGH VOLTAGE COUPLER DIODE SECONDARY CN zo WINDINGS CURRENT CURRENT gq HIGH VOLTAGE REMAINS IN cw 703 HIGH VOLTAGE CAPACITORS WARNING OF INVERTER POWER SUPPLY U GROUNDING Check the High Voltage Inverter Power Supply circuit grounding This High Voltage Inverter Power Supply circuit board must have a proper chassis ground by the grounding bracket to the chassis ground otherwise this H V Inverter circuit board will expose very h
21. without proper test equipment 5 Do not test oven while Inverter grounding strip or screws are loose It is very dangerous to operate the H V Inverter Circuit U with loose mounting screws or if improperly grounded INVERTER POWER SUPPLY DIAGRAM GW HIGH VOLTAGE AREA 1 DO NOT TOUCH HOT HIGH VOLTAGE 2 H V INVERTER U 3 HEAT SINK RECTIFIER BRIDGE CHOKE COIL FILM CAPACITORS HIGH VOLTAGE TRANSFORMER SAND BAR RESISTOR PRIMARY WINDINGS LEAD WIRE SECONDARY WINDINGS CUSTOM L C HIGH VOLTAGE DIODES PHOTO COUPLER MA CN 701 CN 703 INVERTER WARNING DO NOT TOUCH 4 HIGH VOLTAGE CAPACITORS INVERTER SUPPORT LABEL CURRENT TRANSFORMER BRACKET GROUNDING PLATE 5 DO NOT REPAIR REPLACE WHOLE H V INVERTER U Pons 10 11 12 13 14 15 16 TABLE OF CONTENTS CONTROL 5 ici i i papa ai dia pa A G a 4 OPERATION AND DIGITAL PROGRAMMER CIRCUIT TEST PROCEDURE SCHEMATIC DIAGRAM iii i uuu an SAN ENEE EESE DESCRIPTION OF OPERATING SEQUENCE 4 1 Variable power cooking control 4 2 Grill cooking 4 8 Combination cooking 4 4 Autoweight defrost autoweight nD CAUTIONS TO BE OBSERVED WHEN 5 u uu u uuu uuu 10
22. 0 Amp fuse is blown due to the operation of short switch you must replace Primary latch switch and short switch Then follow the installation procedures below Interlock switch replacement In replacing faulty Switches be sure mounting tabs are not bent broken or otherwise deficient in their ability to hold the switches Refer to schematic diagram to ensure proper connection 8 1 Installation of Primary latch switch Secondary latch switch and Short switch 1 When mounting Primary latch switch Secondary latch switch and short switch to door hook assembly mount the Primary latch switch the Secondary latch switch and the short switch to the door hook assembly as shown in the illustration NOTE No specific adjustment during installation of Primary latch switch Secondary latch switch and short switch to the door hook is necessary 2 When mounting the door hook assembly to the oven assembly adjust the door hook assembly by moving it in the direction of arrow in the illustration 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 primary amp secondary latch switches and check the continuity of the monitor circuit and all latch switches again by following the components tes
23. 00 7 MIN SEC min min tart AC T 10 1 CHOOSE COOKING MODE sec sec 8 AUTOWEIGHT COOK PROGRAM 3 Set power level and time PERATION DISPLAY 4 Press start pad 2 1 Select auto weight program 00 CHILLED PIZZA Start X 6 GRILL OPERATION SET WEIGHT OPERATION DISPLAY 1 Select grill power press once for grill 1 GRILL 1 2 1 27 SET TIME FI 1 High 2 Medium CHILLED PIZZA 3 Low SET WEIGHT Grill 1 2 3 3 Enterthe weight 1LB OZ down 2 Set cooking time up 1 00 5 D d SEM 4 Press start 5 10 1 4 MIN SEC se lt GRILL 1 p Ru PRESS START 3 Press start 1 00 ZZ SEC Start 9 TO SET CHILD SAFETV LOCK OPERATION DISPLAV 1 Press start 3 times to displav lock Start LOCK 10 TO RESET CHILD LOCK OPERATION DISPLAV 1 Press stop cancel 3 times Time of dav or colon appears in displav Q Stop Cancel 11 25 11 DEMONSTRATION MODE OPERATION DISPLAY 1 Press clock pad 3 times Clock DEMONSTRATION MODE PRESS ANY KEY 12 CANCEL DEMONSTRATION MODE OPERATION DISPLAY 1 Press clock pad 3 times Clock 11 25 3 SCHEMATIC DIAGRAM NOISE FILTER Note Door Is closed Unit is not operated PO 1H3 BL AC230 240V 50Hz il 4 4 SW1 THERMAL CUT OUT MAG SWS3 PRIMARY
24. AVE COOKING 2 STAGE 2 Press g or Ib and oz OPERATION DISPLAY LB OZ 1 Place water load in oven MEAT ITEMS SET WEIGHT 2 Press Micro Power once to D HE I set High Power HIGH N 3 Enter the weight by pressing Micro Power SET TIME up and down pads 4 down 3 Settime at 5 sec by pressing up 1 sec pad 5 times 5 SEC au use PRESS START 4 Press start pad 5 1 5Tmes i o 6 Start x 4 Press Micro Power pad 3 times to set Medium Power MEDIUM 5 Micro Power SET TIME 5 Setfor 1 minute bv pressing 1min pad once 1 00 8 1 Once MIN SEC jer PRESS START sec sec MEDIUM 4 DELAV STAND 7 COMBINATION COOKING OPERATION DISPLAY OPERATION DISPLAY 1 Set power level and time 1 Press combination COMBINATION SELECT GRILL LEVEL 2 Press stand y Delay STAND Combination rm Stand SET TIME 2 Press stand 3 Set standing time GRILL 1 Hig oja H1 00 2 Medium ola PRESS START 3 Low SELECT MICROPOWER 4 Press start Grill 1 2 3 d 00 gt 4 SEC 3 Select micropower low LOW Start EY 1 00 MIN SEC 25 Micro Power 5 DELAV START SET TIME OPERATION DISPLAV 4 Set cooking time 1 Press delav ji 00 Delav DELAV START Stand sec sec SET TIME PRESS START 2 Setdelay time 5 Press start 4 10 1 H1
25. INTER LOCK SWITCH E701 SW4 SECONDARY INTER LOCK SWITCH SW5 MONITOR DEVICE L GROUNDING FUSE CHASSIS GROUND CN3 INVERTER P C B Mr b BS RY1 FAN MOTOR DIODE VARISTOR PRIMARY LATCH SWITCH SECONDARY LATCH S BOTTOM WITCH OUTSIDE WH BR OR BR POWER RELAY B RY1 SHORT SWITCH BOTTOM INSIDE 0428 POWER RELAY OVEN THERMISTOR RY4 L OVEN LAMP MT TURN TABLE MOTOR HEATER CAUTION HEAT SINK HOT LIVE VERY HIGH VOLTAGE amp TEMPERATU NOTE When replacing check the lead colour as shown Colours shown by indicate colours of leadwire connector housing RE HIGH VOLTAGE INVERTER POWER RELAY RY4 MAGNETRON SYMBOL OR BL COLOUR ORANGE BLUE BROWN WHITE YELLOW RED GREY BLACK BR Ww Y R GY B 4 4 1 Variable power cooking control HIGH VOLTAGE INVERTER POWER SUPPLY U controls output power by a signal from Digital Programmer Circuit DPC Power relay 1 stays on to supply power to the inverter circuit The outpower is controlled by the drive signal level from the inverter circuit NOTE 1 The ON OFF time ratio does not correspond with the percentage of microwave power sinc
26. ORDER NO MOP9905001C2 ervice Manual INVERTER SYSTEM FMEIDE ___ Specifications Microwave Oven NN V359WB Panasonic Power Source 240 V AC Single Phase 50 Hz Power Requirements Microwave 1100W Grill 1210W Maximum 1890W Output IEC705 88 900W Microwave Frequency 2 450Mhz Timer 99 min 99 sec Oven Cavity Size 20L Outside Dimensions 458mm W X 315mm D X 299mm H Inside Dimensions 315mm W X 298mm D X 208mm H Weight 12 Kg Inverter Power Supplv Output power IEC705 88 Test procedure Specifications subject to change without notice 1999 Matsushita Electric Industrial Co Ltd m b Panasonic All rights reserved Unauthorized copying and distribution is a violation of law WARNING This service information is designed for experienced repair technicians onlv and is not designed for use bv the general public It does not contain warnings or cautions to advise non technical individuals of potential dangers in attempting to service a product Products powered bv electricitv should be serviced or repaired oniv bv experienced professional technicians Anv attempt to service or repair the product dealt with in this service information bv anvone else could result in serious injurv or death WARNING This product should be serviced only by trained qualified personnel This service manual covers
27. OX SIGNAL HIGH 900W stay ON stay ON DEFROST 270W stay ON ON OFF MEDIUM 600W stay ON stay ON LOW 440W stay ON stay ON SIMMER 250W stay ON ON OFF WARM 100W stay ON ON OFF GRILL COOKING GRILL NO HEATER RY 4 ON SEC OFF SEC 1 33 0 2 28 5 3 21 12 COMBINATION COOKING COMBINATION HEATER RY 4 MICROPOWER LEVEL NO ON SEC OFF SEC LOW SIMMER WARM 1 33 0 0 0 0 2 28 5 0 0 0 3 21 12 0 0 0 AUTOWEIGHT DEFROST CATEGORY WEIGHT COOKING TIME BREAD 100g 50 seconds MEAT ITEMS 150g 2 mins 21 Secs MEAT JOINTS 400g 7 mins AUTOWEIGHT COOK CATEGORY WEIGHT COOKING TIME CHILLED PIZZA 200g 6 mins 10 secs JACKET POTATO 150g 8 mins 52 secs FROZEN POTATO 100g 4 mins 30 secs PRODUCTS 5 Unlike manv other appliances the microwave oven is high voltage high current equipment Though it is free from danger in ordinarv use extreme care should be taken during repair CAUTION Servicemen should remove their watches whenever working close to or replacing the magnetron 5 1 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 DANGER OF HIGH VOLTAGE AND HIGH TEMPERATURE HOT LINE OF THE INVERTER POWER SUPPLY U This High Voltage Inverter Power Supply circuit handles very high
28. U1F104Z25 CHIP CAPACITOR 5 100nF C224 R20 R111 R113 ERJ3GSYJ102V CHIP RESISTOR 5 R461 R340 R343 ERJ3GSYJ103V CHIP RESISTOR 4 10KQ R650 ERJ3GSY104V CHIP RESISTOR 1 100KQ R110 ERJ3GSYJ220V CHIP RESISTOR 1 220 R460 ERJ3GSVJ333V CHIP RESISTOR 1 33KQ R330 ERJ3GSYJ471V CHIP RESISTOR 1 4700 R40 R48 ERJ3GSYJ683V CHIP RESISTOR 9 68KQ DPC DU E603Y4L20BP Ref No Part No Description Qty Remarks CN5 AEEM19FEBVKN 19 PINCONNECTOR 1 AEEMMD05507W 7 PINCONNECTOR 1 RY1 RY4 AEGG5G1A12 RELAY 2 12V RY2 RY3 5 1 12 RELAV 2 12V D1 ERZV10D511CS VARISTOR 1 D2 D3 ERZV10D112C1 VARISTOR 2 1025 AEICP25011HL PHOTOCOUPLER 1 D26 AESTS1WBA60B DIODE BRIDGE 1 BZ310 EFBAH20C001 BUZZER 1 2KHz IC10 ETXMJ197X1BG SWITCH POWER SUPPLV 1 CN3 AEEMMF00703B 3 PIN CONNECTOR 1 CN4 AEEMMFO0D04W 4 PIN CONNECTOR 1 L10 EXCELDR35V INDUCTOR 1 Q220 Q221 AESCKTC200 NPN TRANSISTOR 1 C11 ECEA1CKA220B CAPACITOR 1 22uF 16V C25 ECA2WHG100E CAPACITOR 1 10uF 450V C10 EEUFC1C471B CAPACITOR 1 470uF 16V R27 ERX12SJ1ROE RESISTOR 1 10 1 4W Q10 2SD1859TV2 POWER TRANSISTOR 1 R220 R22 ERDS2TJ103T RESISTOR 4 10 10 R24 C330 ECBT1E103ZF5 CAPACITOR 1 10nF C331 ECBT2H681KB5 CAPACITOR 1 68pF R11 ERDS2TJ104T RESISTOR 1 100KQ 5 R221 R223 R310 ERDS2TJ102T RESISTOR 3 1KQ 5 R10 ERDS2TJ821T RESISTOR 1 8200 D220 D225 551 4148 DIODE 6 D25 AEDNERA1502 DIODE 1 ZD10 AEDZ5R6ES2T1 ZENER DIODE 1 R26 R25 ERDS1FJ563T RESISTOR 2 56 1 2W
29. connect connector CN4 from DPC DU Disconnect terminal from SW4 secondary latch switch Replace as a whole unit Qr d o OVEN ASSEMBLY TEMP SENSOR 02 041 6 7 Door disassembly 1 Remove door C from door E by carefully pulling outward starting from upper right hand corner using a flat blade screwdriver 2 Remove 4 screws holding door E to door A assembly to separate door E from door A 3 Remove door key and door key spring 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 1 When mounting the door to the oven be sure to adjust the door parallel to the bottom line of the oven face plate by moving the upper hinge and lower hinge in the direction necessary for proper alignment 2 Adjust so that the door has no play between the inner door surface and oven front surface If the door assembly is not mounted properly microwave power may leak from the clearance between the door and oven 3 Perform the microwave leakage test DOORA ASSY gt SCREWS DOOR HOOK l SPRING 41 DOORC 6 8 Turntable motor 1 Remove the motor cover by breaking off at the 8 spots indicated by arrows See Figure NOTE After breaking off the motor cover make sure that cut off portions are properly trimmed off or bend to inside so
30. d no microwave oscillation with AC Ampare meter used for troubleshooting H97 H98 appears in the display window Check input am pares measure at oven plug more than 0 5A continuity Check magnetron filament OK refer to component test procedures less than 0 4A Loose wiring a e pi Magnetron DANGER HIGH VOLTAGE DPC board Power Delay Latch switch DPC control signal Open NOTE If filament is opened it will flow AC input Ampare 0 5 1A STOP If all the above is OK up to this point there mav be a H V Inverter problem SEE NOTE 20 NOTE DO NOT try to REPAIR this Inverter Power Supply U and also DO NOT RE ADJUST PRESET VOLUME on the board It is very dangerous to repair or adjust without sufficient test equipment because this circuit handles very high voltage and very large current Off alignment of inverter board operation is dangerous Operating a misaligned Inverter circuit is dangerous due to the very high voltage and current that is produced by this board Defective boards must be replaced with a new one Check magnetron filament for open or short to casing before proceeding to determine a good magnetron Trouble Related to Digital Programmer Circuit SYMPTOM STEP CHECK RESULT CAUSE CORRECTIONS No display when oven is first 1 Fuse pattern of DPC Normal STEP 2
31. e approximately 2 seconds are required for heating of magnetron filament NOTE 2 If microwave cooking is over 8 minutes with HIGH power fan motor rotates for 1 minute after cooking to cool oven and electric components 4 2 Grill cooking The digital programmer circuit operates power relay 4 in the sequence as shown in the table 4 3 Combination cooking Combination cooking is accomplished by microwave and grill cooking The digital programmer circuit controls ON OFF time of power relay 4 and the inverter control signal level as shown in the table NOTE After grill and combination cooking fan motor rotates for 1 minute to cool oven and electric components 4 4 Autoweight defrost autoweight cook When those auto control feature is selected and Start pad is pressed 1 The digital programmer circuit determines the power level and cooking time to complete cooking and indicates the operating state in the display The table shows the corresponding cooking times for respective weight by categories 2 When cooking time in the display window has elapsed the oven turns off automatically by the controlled signal from the digital programmer circuit NOTE After one touch menu and auto reheat cooking fan motor rotates for 1 minute to cool oven and electric components DESCRIPTION OF OPERATING SEQUENCE VARIABLE POWER COOKING POWER OUTPUT RY 1 INVERTER SETTING POWER CONTROL APPR
32. er power supply U Replace as whole H V Inverter U Unit HIGH VOLTAGE HEAT SINK TRANSFORMER RECTIFIER BRIDGE CHOKE COIL FILM CAPACITORS SAND BAR RESISTOR PRIMARY WINDINGS CUSTOM I C HIGH VOLTAGE DIODES PHOTO COUPLER CN 701 SECONDARY WINDINGS CN 703 CURRENT TRANSFORMER HIGH VOLTAGE CAPACITORS INVERTER POWER SUPPLY DIAGRAM 7 6 Inverter Power supply U WARNING Do not attempt to make any measurements in the high volt age circuitry of the inverter or magnetron See Troubleshooting of inverter circuit and magnetron on Pages 19 and 20 to determine if the inverter power supply is functioning 7 7 Temp sensor Thermal protector A temp sensor is mounted on top of the oven cavity at the left side Its purpose is to automatically shut off the oven in case the cavity overheats for any reason The thermal protector will shut the oven down when the temperature of the cavity reaches 257 F 125 C The device is connected to the DPC on touch control models When the thermal protector exceeds its temperature it will turn off the power to oven cavity and display will go to reset mode The cooking program can be reset after cool down THERMISTOR RESISTANCE VALUE 30K 120K at 10 C 30 C 50 F 86 F TEMP SENSOR 02 042 16 8 WARNING For continued protection against radiation hazard replace only with identical replacement parts When the 1
33. er to procedure for measuring microwave energy leakage CAUTION MICROWAVE RADIATION DO NOT BECOME EXPOSED TO RADIATION FROM THE MICROWAVE GENERATOR OTHER PARTS CONDUCTING MICROWAVE ENERGY IMPORTANT NOTICE NEW H V 1 The following components have potentials above 250V while the appliance is operated Magnetron High voltage transformer Located on Inverter U High voltage diodes Located on Inverter U High voltage capacitors Located on Inverter U Pay special attention on these areas When the appliance is operated with the door hinges or magnetron is fixed incorrectly the microwave leakage can reach more than 5mW cm After repair or exchange it is very important to check if the magnetron and the door hinges are correctly fixed 5 7 Sharp edges CAUTION Please use caution when unpacking installing or moving the unit as some exposed edges may be sharp to touch and may cause injury if not handled with care 6 6 1 Discharge the high voltage capacitors Disconnect wire terminals to the thermal cutout Remove 1 screw holding the thermal cutout bracket to the magnetron Remove 1 screw holding the air guide A Remove 2 screws holding the tie bar Remove the oven lamp and lead wire harness cables from the Air guide A Remove the Air Guide A Disconnect the 2 high voltage lead wires from the magnetron 9 Remove 4 screws holding the magnetron NOTE After replacement
34. igh voltage and cause extreme DANGER Be sure to have proper grounding by the grounding plate and screws 10 CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING H V INVERTER U BE SURE TO HAVE PROPER GROUNDING GROUNDING PLATE WARNING OF DISCHARGING HIGH VOLTAGE CAPACITORS Warning about the electric charge in the high voltage capacitors For about 30 seconds after the oven is turned off an electric charge remains in the high voltage capacitors in the inverter power supply circuit board When replacing or checking parts remove the power plug from the outlet and short the Inverter output terminal of the magnetron filament terminals to the chassis ground with an insulated handle screwdriver to discharge Please make sure to touch chassis ground side first then short to the output terminals Touch chassis side first then short to the terminal of the magnetron filament terminal ES G Tale LS MAGNETRON FILAMENT 225 L TERMINAL E LoT INSULATED HANDLE AN SCREWDRIVER LM WARNING There is high voltage present with high current capabilities in the circuits of the primary and secondary windings choke coil and heat sink of the Inverter It is extremely dangerous to work on or near these circuits with oven energized DO NOT measure the voltage in the high voltage circuit including filament voltage of mag
35. just door and latch switches oven is plugged in with door closed latch switch 2 Defective secondary latch switch 5 Timer starts countdown but no microwave 1 Off alignment of latch switches Adjust door and latch switches oscillation 2 Open or loose connection of high voltage No heat while oven lamp and fan motor circuit especially magnetron filament circuit turn on NOTE Large contact resistance will bring lower magnetron filament voltage and cause magnetron to have lower output and or be intermittent 3 Defective high voltage component Check high voltage component according H V Inverter NEW H V Magnetron to component test procedure Page 15 and replace if it is defective 4 Open or loose wiring of power relay 5 Defective primary latch switch 6 Defective power relay B or DPC AU or DU Refer to DPC troubleshooting 6 Microwave output is low 1 Decrease in power source voltage Consult electrician Oven takes longer time to cook food 2 Open or loose wiring of magnetron filament Refer to output test procedures by water circuit Intermittent oscillation temperature raising test 3 Aging change of magnetron Turntable on when door is opened 1 Shorted primary latch switch Oven does not operate and returns to plugged 1 Opened or loose wiring of temp sensor Check tighten screws on escutcheon base in mode as soon as start pad is pressed 2 Defective temp sensor bracket D P C board and temp sensor 18
36. kQ 25 C C E 40kQ 80kQ o 21 10 EXPLODED VIEW AND PARTS LIST 11 PARTS LISTS NOTES When ordering replacement part s please use part number s shown in this parts list Do not use description of the part Important safety notice Components identified by mark have special characteristics important for safety When replacing any of these components use only manufacturer s specified parts Ref No Part No Part Name and Description Pcs set Remarks 1 E610U4L50GS THERMAL CUTOUT ASSEMBLY 1 2 E900C4L20BP POWER CORD 1 3 AEE9108A20GN POWER CORD CLIP 1 4 E030A4L50GS LEADWIRE HARNESS 1 5 607 4100 NOISE FILTER ASSEMBLY 1 6 E67597550GP 10A FUSE 1 7 E30208000BP DOOR HOOK 1 8 AEE6142 F61 PRIMARY LATCH SWITCH 1 V 15G 3C26 9 E61785180AP SHORT SWITCH 1 L 2C2 2 10 E61425180AP SECONDARY SWITCH 1 L 3C2 2 11 E31384830AP HOOK SPACER C 1 12 E31374830AP HOOK SPACER B 1 13 E41444L00GS UPPER ORIFICE 1 14 E400A4760JP FAN MOTOR 1 15 E42094L00GS LOWER ORIFICE 1 16 E4008 1640 FANBLADE 1 17 E40314L00GS AIR GUIDE C 1 18 XTWANE4 12B SCREWS 4 FOR MAGNETRON 19 2M236 M42E2 MAGNETRON 1 20 E030E4L00GS H V LEADWIRE 1 21 E610T6700BP OVEN LAMP 1 22 E20994L00GS TIE BAR 1 23 E40254L00GS AIR GUIDE A 1 24 E66014L00GS INVERTER EARTH BRACKET
37. netron WARNING Never touch any circuit wiring with your hand nor with an insulated tool during operation 5 3 When parts must be replaced remove the power plug from the outlet 5 4 When the 10A fuse is blown due to the operation of short switch WARNING When the 10A 250V fuse is blown due to the operation of short switch you must replace Primary latch switch and short switch Also replace power relay 1 RY1 when the continuity check reads shorted contacts 1 2 1 This is mandatory Refer to Adjustments and Measurement for these switches 2 When replacing the fuse confirm that it has the appropriate rating for these models 3 When replacing faulty switches be sure mounting tabs are not bent broken or otherwise deficient in their ability to 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 or gaps because such objects may work as an antenna and cause microwave leakage 11 5 6 Confirm after repair 1 After repair or replacement of parts make sure that the screws of the oven etc are neither loose nor missing Microwaves might leak if screws are not properly tightened 2 Make sure that all electrical connections are tight before inserting the plug into the wall outlet 3 Check for microwave energy leakage Ref
38. of the magnetron tighten mounting screws properly making sure there is no gap between the waveguide and the magnetron to prevent microwave leakage Magnetron CAUTION When replacing the magnetron be sure the antenna gasket is in place NOTE Magnetron used for this model is unique type for inverter power supply system Make sure to use the one as listed in the part list 6 2 Inverter Power Supply U Discharge the high voltage capacitors Unplug 3 lead wire connectors from the Inverter Power Supply board Remove 1 screw to release the inverter grounding bracket Remove 1 screw and remove the inverter PCB plus support base from the oven Remove 1 screw to disconnect earth wire to magnetron Remove 4 screws holding inverter power supply board to the Inverter bracket Replace with replacement PCB and follow the steps in reverse CAUTIONS WHILE REPLACING SUPPLY U 1 Make sure to leave grounding plate in its place Make sure to securely tighten grounding screw through the side of chassis base Securely connect 3 lead wire connectors Make sure the heat sink has enough space gap from the oven Take special care not to touch any lead wire to the aluminium heat sink because it is hot INVERTER POWER 2 3 4 12 DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE AIR GUIDE DANGER HIGH VOLTAGE AREA 08 125M H V INVERTER U INVERTER SUPPORT BRACKET lt A
39. owave oscillation at any power set 1 IC 1 pin 7 and 72 voltages while Abnormal IC 1 ting operation at high power Norma Step 2 7 5V 72 5V 2 Q220 transistor Abnormal Q220 Norma IC220 Dark or unclear displav 1 Replace display and check opera Norma DISPLAY tion Abnormal IC 1 Missing or lighting of unnecessary segment 1 Replace IC 1 and check operation Normal IC 1 Abnormal DISPLAY Oven shuts down on Micropower after a 1 Unplug CN702 2 pin connector and OV 1 Latch switch short time set in test mode set high power measure voltage between terminals 2 DPC Power relay 1 Min H97 H98 appears in window and AC line voltage of 240V gt Step 2 oven stops operation Program High Unplug CN701 3 pin connector 0 1 DPC for 1 minute and conduct following test measure pin 1 voltage Approx AV 3V 1 Magnetron quickly unless H97 H98 appears and oven 2 Inverter stops NEWRY How to Check the Semiconductors Using an OHM Meter n K FORWARD REVERSE Diode ANODE CATHODE A K SMALL CD Di A K FORWARD REVERSE B E SMALL 55 c B C SMALL Transistor NPN Transistor COLLECTOR a 2SD B BASE FORWARD REVERSE ECB E E B SMALL EMITTER CB SMALL m PNP Transistor E C E EG 2SA B ai 25 FORWARD REVERSE Digital Transistor ECB E B 10kQ 30kQ 10kQ 30kQ PNP Transistor E C B 50kQ 90
40. ption Pcs Set Remarks E1 E80724L10HBP DOOR OPENING BUTTON 1 E2 E80378AOAG DOOR BUTTON SPRING 1 E3 E80344L10HBP ESCUTCHEON BASE 1 E4 E81274L10BP ESCUTCHEON BACK PLATE 1 E5 E603L4L20BP DPC AU 1 E6 E66164L00GS RIBBON CABLE 1 E7 E82564L10BP DOOR OPENING LEVER 1 E8 E603Y4L20BP DPC DU 1 E9 E83264L10BP DISPLAY SHEET 1 E10 E00074L20BP NAME PLATE 1 E11 E83374L20HBP ESCUTCHEON SHEET 1 NOTE 3 Please order Escutcheon Base and Name Plate together 25 14 PACKING AND ACCESSORIES P12 Ref No Part No Part Name amp Description Pcs Set Remarks P1 E060V4L20BP WIRE RACK ASSEMBLY 1 P2 E06435870GS WIRE RACK FOOT 3 P3 E290D6150WN ROLLER RING 1 P4 06014100 GLASS TRAV 1 P5 E00034L20BP INSTRUCTION BOOK 1 P6 E01695750BP SERVICE CENTER LIST 1 P7 E01084L00GS TRAV PACKING 1 P8 01054100 LOWER FILLER 1 P9 E01024L20HBP CARTON BOX 1 P10 E01074L00GS DOOR SHEET 1 P11 01066 0 VINVL COVER 1 P12 01044100 UPPER FILLER 1 26 607 41 00 Noise Filter Assembly Ref No Part No Description Qty Remarks R1 ERG1SJ753P RESISTOR 1 75KQ 1W C1 amp C2 AECQJ5225KX1 CAPACITOR 2 2 2uf C38C4 ECKMNA472ME CAPACITOR 2 4700pF 250V AC L1 E621A4J00XN FILTER COIL 1 2 4mH GND E03594080BP EARTH WIRE 1 F1 E62316010BP FUSE HOLDER 1 10A 250V AC 27 15 DIGITAL PROGRAMMER CIRCUIT
41. t 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 litre beaker Glass thermometer Wrist watch or stopwatch NOTE Check the line voltage under load Low voltage will lower the magnetron output Take the temperature readings and heating time as accurate as possible 1 Fill the beaker with exactly one litre of tap water Stir the water using the thermometer and record the beaker s temperature recorded as T1 2 Place the beaker on the center of glass cook plate 3 Setto high power and heat for exactly one minute 4 Stir the water again and read the temperature of the beaker recorded as T2 5 The normal temperature rise at High power position for each model is as shown in table 17 MEASUREMENTS AND ADJUSTMENTS DOOR SCREW PRIMARY SWITCH LATCH SWITCH SCREW LATCH DOOR HOOK ASSEMBLY SHORT SWITCH SECONDARY GAP SHOULD lt 0 7MM ACTUATOR LEVER Please confirm that the gap between the switch housing and switch actuator levers is no more than 0 7 mm when the door is closed TABLE 1 1min test 01 033 RATED OUTPUT TEMPERATURE RISE 900W IEC705 88 7 C
42. utious 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 exact cause of any trouble since operator error may be mistaken for the oven s malfunction SYMPTOMS CAUSE CORRECTIONS 1 Oven is dead 1 Open or loose lead wire harness Check fan motor when thermal cutout is Fuse is OK 2 Open thermal cutout Magnetron defective No display and no operation at all 3 Open low voltage transformer 4 Defective DPC AU or DPC DU 2 display and no operation at all 1 Shorted lead wire harness Check adjustment of primary secondary Fuse is blown 2 Defective primary latch switch NOTE 1 latch switch and short switch including 3 Defective short switch NOTE 1 door 4 Defective Inverter power supply U INEW H V Refer to component test procedure Page 15 NOTE 1 All of these switches must be replaced at the same time Refer to adjustment instructions Check continuitv of power relav B s contacts between 1 and 2 and if it has conti nuitv replace power relav B also 3 Oven does not accept key input Program 1 Key input is not in sequence Refer to operation procedure 2 Shorted push button on DPC AU 3 Defective DPC AU Refer to DPC troubleshooting 4 Oven lamp and turntable motor turn on when 1 Misadjustment or loose wiring of secondary Ad
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