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Panasonic NN-T704QF Service Manual
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Panasonic NN-T704QF Service Manual

Panasonic NN-T704QF Service Manual

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ORDER NO.SIMMC 0407020A3
Microwave Oven
NN-T794AF / NN-T784SF / NN-T704QF / NN-T774SF / NN-
S784BF / NN-S784WF / NN-S754BF / NN-S754WF
QPQ(Australia & New Zealand)
Please file and use this manual together with the service manual for
Model NN-S560WF (ORDER NO. SIMMC0006012C3)
SPECIFICATIONS
1

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  • Page 1 ORDER NO.SIMMC 0407020A3 Microwave Oven NN-T794AF / NN-T784SF / NN-T704QF / NN-T774SF / NN- S784BF / NN-S784WF / NN-S754BF / NN-S754WF QPQ(Australia & New Zealand) Please file and use this manual together with the service manual for Model NN-S560WF (ORDER NO. SIMMC0006012C3)
  • Page 2 2004 Panasonic Home Appliances Microwave Oven (Shanghai) Co., Ltd. / All rights reserved. Unauthorized copying and distribution is a violation of law.
  • Page 6 1. SCHEMATIC DIAGRAM 2. CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING Unlike many other appliances, the microwave oven is a high voltage, high current device. It is...
  • Page 7 free from danger in ordinary use, though extreme care should be taken during repair. Caution Servicemen should remove their watches whenever working close to or replacing the magnetron. 2.1. Check the grounding Do not operate on a two wire extension cord. The microwave oven is designed to be grounded when used.
  • Page 8 the inverter earth bracket. Grounding of the inverter circuit board WARNING! DISCHARGE THE HIGH VOLATGE 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.
  • Page 9 Never touch any circuit wiring with your hand or with an insulated tool during operation. 2.3. Part replacement. When any part or component is to be replaced, always ensure that the power cord is removed from the wall outlet. 2.4. When the 10A fuse is blown due to the operation of the short switch: WARNING When the 10A 250V fuse is blown due to the operation of the...
  • Page 10 The following components have potentials above 2000V 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 to these areas. When the appliance is operated with the door hinges or magnetron installed incorrectly, the microwave leakage can exceed more than 5mW/cm...
  • Page 11 3.2. 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 12 RATED OUTPUT TEMPERATURE RISE 1100W Min. 9.4°C 4. EXPLODED VIEW AND PARTS LIST 4.1. EXPLODED VIEW 4.2. PARTS LIST NOTE: 1. When ordering replacement part(s), please use part number(s) shown in this part list. Do not use description of the part. 2.
  • Page 13 Ref. No. Part No. Part Name & Description Pcs/Set Remarks F00066V00HP CAUTION LABEL F03534W00QP LEAD WIRE HARNESS F10014W00AP BASE F10084T00AP RUBBER FOOT F110D4W00BQP CABINET BODY (U) T794AF,T704QF,S784BF,S754BF F110D6V00SQP CABINET BODY (U) T784SF F110D6V10SQP CABINET BODY (U) T774SF F110D4W00HQP CABINET BODY (U) S784WF,S754WF F200A5X20AP OVEN (U)
  • Page 14 Ref. No. Part No. Part Name & Description Pcs/Set Remarks J692Y4T00QPR NOISE FILTER F02445Y00AP CAUTION LABEL T784SF 4.3. DOOR ASSEMBLY Ref. No. Part No. Part Name & Description Pcs/Set Remarks F3018-1200 DOOR KEY A F302A5X10AAP DOOR A (U) T794AF QPQ F302A5X00SAP DOOR A (U) T784SF QPQ,T774SF QPQ F302A5X10QAP DOOR A (U)
  • Page 15 Ref. No. Part No. Part Name & Description Pcs/Set Remarks F030A5T50QP LEAD WIRE HARNESS F030E6V00QP H.V.LEAD WIRE 4.5. ESCUTCHEON BASE ASSEMBLY 4.5.1. NN-T7*4...
  • Page 17 Ref. No. Part No. Part Name & Description Pcs/Set Remarks F608E6V00QP D.P.CIRCUIT (ABU) T794AF, T784SF, T704QF F603L6V10QP D.P.CIRCUIT (AU) T774SF F800L4W70BAP CONTROL PANEL (AU) T774SF F630Y6V10BQP MEMBRANE SWITCH (U) T774SF F82565X00AP DOOR OPENING LEVEL T794AF, T784SF, T704QF F82564W00AP DOOR OPENING LEVEL T774SF F81274W70AP BACK PANEL...
  • Page 18 Ref. No. Part No. Part Name & Description Pcs/Set Remarks F603L6V20QP D.P.CIRCUIT (AU) S784BF/WF F603L6V30QP D.P.CIRCUIT (AU) S754BF/WF F630Y6V20BQP MEMBRANE SWITCH (U) S784BF F630Y6V20HQP MEMBRANE SWITCH (U) S784WF F630Y6V30BQP MEMBRANE SWITCH (U) S754BF F630Y6V30HQP MEMBRANE SWITCH (U) S754WF F80346J00BAP ESCUTCHEON BASE S784BF, S754BF F80346J00HAP ESCUTCHEON BASE S784WF, S754WF...
  • Page 19 Ref. No. Part No. Part Name & Description Pcs/Set Remarks F00036V20QP INSTRUCTION MANUAL F01026V00AQP PACKING CASE,PAPER T794AF QPQ F01026V00SQP PACKING CASE,PAPER T784SF QPQ F01026V00QQP PACKING CASE,PAPER T704QF QPQ F01026V10SQP PACKING CASE,PAPER T774SF QPQ F01026V20BQP PACKING CASE,PAPER S784BF QPQ F01026V20HQP PACKING CASE,PAPER S784WF QPQ F01026V30BQP PACKING CASE,PAPER S754BF QPQ...
  • Page 21 5.2. NN-T774SF QPQ...
  • Page 23 5.3. NN-S784/S754 QPQ...
  • Page 25 5.4. PARTS LIST 5.4.1. NN-T794AF, T784SF, T704QF...
  • Page 26 Ref. No. Part No. Part Name & Description Pcs/Set Remarks BZ310 AEFBAT2001 BUZZER 2.0KHz C221,C222,C484,C486 AECUU06F103Z CHIP CAPACITOR 0.01 F/50V C343 AECUU06C101J CHIP CAPACITOR 100PF/50V C12,C340,C440 AECUT06F104Z CHIP CAPACITOR F/25V C330,C331 AECUU06R102K CHIP CAPACITOR 1000PF/50V C481 AECUU06F473Z CHIP CAPACITOR 0.047 F/50V AECETK1V561B AL CHEM CAPACITOR...
  • Page 27 Ref. No. Part No. Part Name & Description Pcs/Set Remarks AETP5L00QP LOW VOLTAGE TRANSFORMER ZD10 AESZMTZJ5R6B ZENER DIODE SW1-SW4,SW6-SW8, SW11-SW30 EVQ11L05R SWITCH 5.4.2. NN-T774SF, S784BF/WF, S754BF/WF...
  • Page 28 Ref. No. Part No. Part Name & Description Pcs/Set Remarks BZ310 AEFBAT2001 BUZZER 2.0KHz C221 AECUU06F103Z CHIP CAPACITOR 0.01 F/50V C484 AECUU06F103Z CHIP CAPACITOR 0.01 F/50V (EXCEPT S754BF/ C343 AECUU06C101J CHIP CAPACITOR 100PF/50V C12,C340,C440 AECUT06F104Z CHIP CAPACITOR F/25V C222 AECUT06F104Z CHIP CAPACITOR F/25V (T774SF) C330...
  • Page 29 Ref. No. Part No. Part Name & Description Pcs/Set Remarks R488,R491 AERJ06J202R CHIP RESISTOR 2K,1/10W,5% (EXCEPT S754BF/ R181,R320 AERJ06J220R CHIP RESISTOR ,1/10W,5% R227 AERJ06J220R CHIP RESISTOR ,1/10W,5% (EXCEPT T774SF) R220,R222,R223 AERJ06J222R CHIP RESISTOR 2.2K,1/10W,5% R310 AERJ06J332R CHIP RESISTOR 3.3K,1/10W,5% R330,R440 AERJ06J333R CHIP RESISTOR 33K,1/10W,5%...
  • Page 30 ORDER NO. SIMMC 0001002C1 Service Manual Microwave Oven MODELS Canada NN-S560BF/WF NN-S550BF/WF NN-S540BF/WF NN-L530BF NN-L530WF NN-L520WF NN-S510WF * RPH Model refer to the last page. Specifications for APH : NN-S560BF/WF NN-S550BF/WF NN-S540BF/WF NN-L530BF/WF Model: Specifications: Power Source: * 120V AC Single Phase, 60Hz Power Requirement: 1370W 1370W...

  • Page 31: Table Of Contents

    5. Any serviceman who learns of any accident pertaining to microwave radiation leakage including the oven operating with open door should immediately notify the appropriate address listed below and Center for Devices and Radiological Health, DHHS. IN U.S.A. Panasonic Services Company IN PUERTO RICO (PASC) 50 Meadowland Parkway,...
  • Page 32 DANGER OF HIGH VOLTAGE AND HIGH TEMPERATURE (HOT/LIVE) OF THE INVERTER POWER SUPPLY INVERTER WARNING This Inverter board looks like a regular PCB. However, this PCB drives the magnetron tube with extremely high voltage NEW HV and high current. IT HAS: 1. Very high voltage and high current circuits. It functions the same as the high voltage transformer and high voltage capacitor in ordinary microwave ovens.

  • Page 33: Feature Chart

    FEATURE CHART NN-S560WF NN-S550WF NN-S540WF NN-S510WF MODEL FEATURE NN-S530WF NN-S520WF Three Stage Cooking Inverter Turbo Defrost Auto Reheat Inverter Auto Cook Sensor Reheat Sensor Cook Quick Min Popcorn Timer Digital Clock CONTROL PANEL NN-S560(CPH) NN-S550 NN-S560(APH) a a a a a a a a a a Inverter Auto...
  • Page 34 CONTROL PANEL NN-S540 NN-L530 NN-L520 MN-S510 Display Windows Popcorn Pad Inverter Turbo Defrost Pad (4a) Sensor Reheat Pad (4b) Auto Reheat Pad Power Level Pad Number Pads Timer Pad Clock Pad Sensor Cook Pad (10) Inverter Auto Cooking Pads (11) Quick Min Pad (12) More /Less Pad (13) Cooking Guide (14) Auto Cook Pad...

  • Page 35: Operation And Digital Programmer Circuit Test Procedure

    OPERATION AND DIGITAL PROGRAMMER CIRCUIT TEST PROCEDURE When you pluge the power supply cord into the wall outlet, microwave oven automatically enter into the state of lb / oz. If you want to use g / kg state, please press Start pad after pluging the power source. 1.
  • Page 36 8. Auto Reheat OPERATION SCROLL DISPLAY OPERATION SCROLL DISPLAY 3. Press Serving / Weight pad. (Select 4. 6. 10. 14 slices) 1. Press Auto Reheat pad twice for two servings. 4. Press Start pad. 2. Press Start pad.Auto Reheat 4.10 cycle begins time counts down.

  • Page 37: Schematic Diagrams

    SCHEMATIC DIAGRAM (APH) SCHEMATIC DIAGRAM (APH) - 7 -...
  • Page 38 SCHEMATIC DIAGRAM (CPH) SCHEMATIC DIAGRAM (CPH) - 8 -...

  • Page 39: Description Of Operating Sequence

    DESCRIPTION OF OPERATING SEQUENCE 1. Variable power cooking control Variable Power Cooking The coil of power relay B (RY1) is energized intermittently by the digital ON-OFF TIME OF OUTPUT programmer circuit, when the oven is set at any power selection except POWER RELAY B (RY1) POWER SETTING POWER(%)
  • Page 40 4. Sensor Cooking (NN-S560BFAPH/CPH NN- AUTO SENSOR COOKING/REHEAT PROCESS S560WFAPH/CPH) Auto sensor cooking is a revolutionary way to cook by microwave without setting a power level or selecting a time. All that is necessary is to select an Auto Sensor Program before starting to cook.

  • Page 41: Cautions To Be Observed When Troubleshooting

    CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING Unlike many other appliances, the microwave oven is high-voltage, high WARNING current equipment. Though it is free from danger in ordinary use, extreme Never touch any circuit wiring with your hand nor with an care should be taken during repair.
  • Page 42 6.Confirm after repair (A) 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. (B) Make sure that all electrical connections are tight before inserting the plug into the wall outlet.

  • Page 43: Disassembly And Parts Replacement Procedure

    DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE 1. Magnetron (A) Discharge the high voltage capacitors, as mentioned and shown on page 11. (B) Remove 1 screw holding air guide c to magnetron. (C) Disconnect 2 high voltage lead wires from magnetron filament terminals. (D) Remove 4 screws holding the magnetron.
  • Page 44 5. Door assembly DOOR (A) Remove door C from door E by carefully pulling outward starting from CCREEN B upper right hand corner using a flat blade screwdriver. DOOR A (B) Separate door E from tabs on door A and remove door A. DOOR (C) Open Door E at the opening angle of approximately 10°...
  • Page 45 8. Inverter Power Supply (U) CAUTIONS WHILE REPLACING INVERTER POWER SUPPLY (U) 1. Make sure to leave the grounding plate in its place. 2. Make sure to securely tighten grounding screw from the bottom of chasis (base). 3. Securely connect 3 lead wire connectors. 4.

  • Page 46: Component Test Procedure

    COMPONENT TEST PROCEDURE 5. Inverter Power Supply (U)for USA only CAUTION NEW. H.V. DO NOT try to REPAIR this H.V. Inverter power supply 1. High voltage is present at the high voltage terminal of (U).Replace as whole H.V. Inverter(U) Unit. the High Voltage Inverter (U) including aluminum heat sink during any cook cycle.
  • Page 47 6. Steam Sensor and Digital Programmer Circuit In order to determine if the 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.

  • Page 48: Measurements And Adjustments

    MEASUREMENTS AND ADJUSTMENTS WARNING * For continued protection against radiation hazard, SWITCH replace only with identical replacement parts(For touch m o d e l s P a r t N o . A N E 6 1 4 2 - 1 4 5 0 , T y p e N o . V-16G-3C26-M for Primary latch switch;...

  • Page 49: Procedure For Measuring Microwave Energy Leakage

    PROCEDURE FOR MEASURING MICROWAVE ENERGY LEAKAGE (B) Should the radiation leakage be more than 2 mW/cm (1mW/cm WARNING for Canada) after determining that all parts are in good Check for radiation leakage after every servicing. Should condition, functioning properly, and genuine replacement parts as listed in this manual have been used, immediately the leakage be more than 2 mW/cm (1mW/cm...

  • Page 50: Troubleshooting Guide

    TROUBLESHOOTING GUIDE CAUTION 1. Check grounding before checking for trouble. 2. Be careful of high voltage circuit. 3. Discharge high voltage capacitor. 4. When checking the continuity of the switches or the high voltage transformer,disconnect one lead wire from these parts and then check continuity with the AC plug removed.
  • Page 51 Oven does not operate and return to plugged in 1. Defective DPC Check tighten screws on escutcheon mode as soon as start pad is pressed. base bracket, D.P.C. board. Loud buzzing noise can be heard. 1. Loose fan and fan motor Turntable motor does not rotate.
  • Page 52 Troubleshooting of Inverter Circuit (U) and Magnetron NEW H.V. This oven is programmed with a self diagnostics failure code system which will help for troubleshooting. H97, H98, and H99 are the provided failure codes to indicate magnetron and inverter circuit problem areas. This section explains failure codes of H97, H98, and H99. First, you must program the DPC by pressing Clock , Time , Start , Power Level .
  • Page 53 Trouble Related to Digital Programmer Circuit SYMPTOM STEP CHECK RESULT CAUSE/CORRECTIONS No display when oven is first plugged in. Fuse pattern of DPC Normal STEP 2 Oven is dead. Open (NOTE) Shorted Circuit of ZNR, L.V.T., Oven Lamp etc. Replace DPC Low voltage transformer (LVT) Abnormal 0V ➝...

  • Page 54: Exploded View And Parts List

    EXPLODED VIEW AND PARTS LIST - 24 -...

  • Page 55: Schematic Diagram & Parts List Of Digital Programmer Circuit

    PARTS LIST NOTE 1: When ordering replacement part(s), please use part number(s) shown in this part list. Do not use description of the part. 2: Important safety notice: Components identified by mark have special characteristics important for safety. When replacing any of these components, use only manufacture’s specified parts. Pcs/ Ref.No.
  • Page 56 Pcs/ Ref.No. Part No. Part name & Description Remarks AC120V, SINGLE PHASE, 60Hz F400A4T00AP FAN MOTOR F40084T00AP FAN BLADE F40254T00AP AIR GUIDE A F41444T00AP ORIFICE F64505540AP EXHAUST GUIDE B S560*F*PH A707S4T00AP STEAM SENSOR S560*F*PH F65434T00AP SENSOR BRACKET C S560*F*PH F612E9660AP INCANDESCENT LAMP(U) 125V, 60Hz, 20W ANE6142-1450...
  • Page 57 DOOR ASSEMBLY (S-4T0) Pcs/ Ref.No. Part No. Part name & Description Remarks B3018-1480 DOOR KEY ==#A DOOR A F30014T00BAP ****BF*PH F30014T00HAP DOOR A ****WF*PH F302K4T00AP DOOR E (U) DOOR KEY SPRING B30214000AP F30854T00AP DOOR C F31454T00AP DOOR SCREEN A F31464T00BAP DOOR SCBEEN B ****BF*PH DOOR SCREEN B...
  • Page 58 ESCUTHEON BASE ASSEMBLY (S-4T0) Part name & Description Pcs/ Ref.No. Part No. Remarks S560BFAPH/S560WFAPH RTL (W/COMPONENT) F603L4T00AP D.P.CIRCUIT S560BFCPH/S560WFCPH RTL (W/COMPONENT) F603L4T00CP D.P.CIRCUIT S550BFAPH/S550WFAPH RTL (W/COMPONENT) F603L4T10AP D.P.CIRCUIT D.P.CIRCUIT S540BFAPH/S540WFAPH RTL (W/COMPONENT) F603L4T20AP F603L4T20CP D.P.CIRCUIT S540BFCPH/S540WFCPH RTL (W/COMPONENT) L530BF/WFAPH RTL (W/COMPONENT) F603L4T30AP D.P.CIRCUIT L530WF/L520WFCPH...
  • Page 59 PACKING AND ACCESORIES OVEN WALL TRAY PAD Cut into three parts when packing. FRONT VIEW ROLLER RING(U) Cut into two parts when packing. (S-4T0) Pcs/ Ref.No. Part No. Part name & Description Remarks S560BFAPH/S560WFAPH INSTRUCTION MANUAL F00034T00AP S560BFCPH/S560WFCPH INSTRUCTION MANUAL F00034T00CP S550BFAPH/S550WFAPH INSTRUCTION MANUAL...
  • Page 60 WIRING MATERIAL (S-4T0) Pcs/ Ref.No. Part No. Part name & Description Remarks LEAD WIRE HARNESS F030A4T20AP ******APH F030A4T00CP LEAD WIRE HARNESS ******CPH F030E4T00AP H.V. LEAD WIRE ******APH H.V. LEAD WIRE F030E4T00CP ******CPH - 30 -...
  • Page 61 DIGITAL PROGRAMMER CIRCUIT (NN-S560BFAPH/CPH,S560WFAPH/CPH) PARTS LIST Pcs/ Ref.No. Part No. Part name & Description Remarks BZ310 AEFB22EP20TL BUZZER 2.0KHz C12,C290,C291,C300,C301 AECUB2F104ZK CAPACITOR 0.1µF/25V C330 AECUB5C102KK CAPACITOR 0.1µF/50V C340 AECUB5F103ZK CAPACITOR 0.01µF/50V ECEA1VM471B ELECTROLYTIC CAPACITOR A 470µF/35V ECEA1CKA100B ELECTROLYTIC CAPACITOR A 10µF/16V AEEMXF01505W CONNECTOR...
  • Page 62 DIGITAL PROGRAMMER CIRCUIT (NN-S530BFAPH/CPH,S540BFAPH/CPH,S540WFAPH/CPH,L530BFAPH/CPH, L530WFAPH/CPH,L520WFAPH/CPH,L510WFAPH/CPH) PARTS LIST Pcs/ Ref.No. Part No. Part name & Description Remarks BZ310 AEFB22EP20TL BUZZER 2.0KHz C12,C290,C291,C300,C301 AECUB2F104ZK CAPACITOR 0.1MF/25V C330 AECUB5C102KK CAPACITOR 0.1MF/50V C340 AECUB5F103ZK CAPACITOR 0.01MF/50V ECA1VM471B ELECTROLYTIC CAPACITOR AL 470MF/35V ECEA1CKA100B ELECTROLYTIC CAPACITOR AL 10MF/16V AEEMXF01505W CONNECTOR...
  • Page 63 -33-...
  • Page 64 -34-...
  • Page 65 Model for Latin America & Mexico MODELS Mexico Latin America NN-S540BF/WF NN-540BF/WF * This product is based on NN-S540BF/WF APH model, the different parts are listed as followings: * Any serviceman who has any quiries or order service parts, please contact own area’s service company Pcs/ Ref.No.

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