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Panasonic NN-V673SBBPQ Service Manual

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MOP0306005A2
Microwave Oven
NN-V673SBBPQ
27 L
United Kingdom
Please file and use this manual together with the service manual for
Model No. NN-V671S
SPECIFICATIONS
1

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Summary of Contents for Panasonic NN-V673SBBPQ

  • Page 1 MOP0306005A2 Microwave Oven NN-V673SBBPQ 27 L United Kingdom Please file and use this manual together with the service manual for Model No. NN-V671S SPECIFICATIONS...

  • Page 2: Description Of Operation

    1995 Matsushita Electric Industrial Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law. 1. Description of operation 1.1. Auto weight defrost, Auto weight Cook When an auto control feature is selected and the start pad pressed: 1.

  • Page 3: Main Parts List

    Category 1st Touch Cooking Weight Time 1.Curry 300g 3m 30s 2.Chinese Style 200g 2m 10s 3.Pasta 250g 2m 55s 4.Casserole 300g 3m 15s 5.Fresh Fish 100g 1m 30s 6.Fresh Vegetables 100g 2m 20s 7.Chilled Crispy Top 300g 8.Frozen Crispy Top 300g 9.Jacket Potatoes 200g...

  • Page 4: Main Exploded View

    Part Number Remarks Ref. Part Name and Description E901C6520BP POWER SUPPLY CORD AEE9108A20GN POWER CORD CLIP ANE6230P10GN FUSE 16A E607X4N30BP NOISE FILTER E67597550GP CERAMIC FUSE 10A E030A56C10BP LEADWIRE HARNESS E41444N30BP UPPER ORIFICE E30208000BP DOOR HOOK E6142-1450 PRIMARY LATCH SWITCH E61785180AP SHORT SWITCH E61425180AP SECONDARY LATCH SWITCH...

  • Page 5: Door Exploded View

    4. Door Exploded View...

  • Page 6: Packing And Accesories

    Ref. Part No. Part Name & Description Remarks Part No. E302A6C10SBP DOOR A ASSEMBLY E30214000AP DOOR KEY SPRING E30184L00GS DOOR KEY E302K4N30BP DOOR E ASSEMBLY E30854N30BP DOOR C NOTE: When ordering any Door component also order door C as this part may become damaged during disassembly.
  • Page 7 Ref. No. Part No. Part Name & Description Remarks RUBBER FOOT E06435870SP E060V5870SP WIRE RACK E01084N30GP TRAY PACKING E06014N30BP GLASS TRAY E290D4N30BP ROLLER RING UNIT E00036C10BP COOK BOOK E01695750BP SERVICE CENTER LIST E01134N30BP TRAY STYROL E01025N20BP CARTON BOX NN-V681WB E01054N30BP LOWER FILLER E01064N70GS VINYL BAG...
  • Page 8 7. Trim Kit Accesories Trim model number Top and bottom strip REF 1 Top and bottom strip REF 2 Remarks NN-TKA70MB E1603A510NBP E1601A510NBP E000QA820BP Installation guide 8. DPC Schematic...

  • Page 11: Specifications

    MOP01060021C2 Microwave Oven NN-V681WB / NN-V671SB / NN-V621MB / NN-V651WB / NN- V651CB United Kingdom SPECIFICATIONS 1995 Matsushita Electric Industrial Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law. NOTATION PUBLIC "-//ALDUS//NOTATION TAGGED IMAGE FILE FORMAT//EN" ENTITY SYSTEM "warning.tif"...

  • Page 12: Inverter Warning

    1. Inverter warning The inverter board looks like a normal printed circuit board. However, this printed circuit board supplies the magnetron tube with very high voltage and current. The inverter PCB: 1. Produces very high voltage and current. 2. Has an Aluminium heat sink which becomes very hot. 3.

  • Page 13: Feature Chart

    Inverter Power Supply Diagram Figure 2 Inverter Layout 2. FEATURE CHART Function NN-V651 NN- NN-V681 V671 NN-V621 Microwave Grill Combination 3 x 4 3 x 4 Sensor reheat Sensor Cook Sensor Combination Turbo reheat Weight reheat Weight cook Weight combination Weight defrost Delay/Stand More / Less...

  • Page 14: Control Panels

    Function NN-V651 NN- NN-V681 V671 NN-V621 Word prompt English English 3. Control Panels 4. Operation and digital programmer test procedure 4.1. Setting The Clock 1. Plug the power supply cord into the wall outlet 2. Press the clock pad 3. Enter the time of the day...
  • Page 15 4. Press the clock pad 4.2. Microwave Cooking 1. Place a water load in the oven 2. Press Micro power once to set high power 3. Set time at 10 sec. by pressing 10 sec. pad once 4. Press Micro power pad 3 times to set medium power 5.
  • Page 16 8. When second stage cooking has elapsed oven bleeps 5 times and shuts off 4.3. Turbo Reheat 1. Place water load in the oven 2. Press the Turbo reheat button once 3. Set time to 1 minute by pressing1 min pad once 4.
  • Page 17 3. Enter the weight by pressing the Up & Down Pads. 4. Press Start 4.5. Delay Stand 1. Set power level and time 2. Press Stand 3. Set standing time 4. Press Start 4.6. Delay Start 1. Press delay...
  • Page 18 2. Set delay time 3. Set power level and time 4. Press start pad 4.7. Grill Operation 1. Select grill power press once for grill 1 2. Set cooking time 3. Press start 4.8. Combination Cooking (Grill And Microwave) 1. Press combination pad 2.
  • Page 19 3. Select micro power 4. Set cooking time 5. Press start pad 4.9. Auto Weight Cook Programs NN-V651 NN-V621 NN-V671 1. Select the desired auto weight cook program 2. Press to select grams or pounds and ounces 3. Enter the weight by pressing the up and down pads 4.

  • Page 20: Schematic And Wiring Diagram

    4.10. Auto Sensor Cooking NN-V681 1. Select the desired sensor cook program 2. Press start 4.11. Demonstration Mode 1. Set demonstration mode by pressing the clock pad three times 2. Cancel demonstration mode by pressing the clock pad three times 4.12.
  • Page 21 6. Description Of The Operating Procedure 6.1. Variable power cooking control The output power is controlled by the inverter power supply, which is controlled by signals from the digital programmer circuit (DPC). The digital programmer cicruit operates relay RY1 to supply power to the inverter circuit.
  • Page 22 Setting Output On Time Off Time Turbo 1000W High 900W Defrost 440W Medium 600W 440W Simmer 440W Warm 440W NOTE 1. The ON/OFF time ratio does not correspond with the percentage of microwave power since approximately 2 seconds are required to heat the magnetron filament. NOTE 2.
  • Page 23 cooking time and indicates the operating state in the display. The table shows the corresponding cooking times for each category and its respective weight. 2. When the cooking time in the display window has elapsed, the oven turns off automatically via the control signal from the digital programmer circuit.
  • Page 24 the food is covered, this steam builds up and eventually escapes from the container. In auto sensor cooking, a carefully designed instrument, called the humidity sensor element, senses the escape of steam. then, based upon the auto sensor program selected, the unit will automatically determine the correct power level and the proper length of time it will take to cook the food.

  • Page 25: Cautions To Be Observed When Troubleshooting

    Auto sensor cooking 7. Cautions to Be Observed When Troubleshooting Unlike many other appliances, the microwave oven is a high voltage, high current device. Though it is free from danger in ordinary use, extreme care should be taken during repair. Caution Servicemen should remove their watches whenever working close to or replacing the magnetron.
  • Page 26 HV 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 bracket must be connected to the chassis.
  • Page 27 Discharging the high voltage capacitors 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 the oven energized.

  • Page 28: Parts Replacement Procedure

    7.5. 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 holes or gaps, because such objects may work as an antenna and cause microwave leakage. 7.6.
  • Page 29 8.1. Magnetron 1. Discharge the high voltage capacitors on the inverter circuit. 2. Remove the screw holding the air guide. 3. Remove the two screws holding the tie bar. 4. Remove the oven lamp and lead wire harness cables form the air guide A.
  • Page 30 5. Remove the connector CN701 and CN702 from the inverter PCB. 6. Remove the two screws holding the inverter base to the chassis (See figure 2). 7. Carefully remove the inverter PCB and support base from the oven. 8. Remove the air guide E by un-clipping the catch hooks. 9.
  • Page 31 Disconnecting the PCB lock connector. 8.3. Digital Programmer Circuit (DPC) and membrane key board. NOTE: Ground any static electric built up on your body before handling the DPC. 1. Disconnect all connectors from the DPC. 2. Remove the two screws holding the escutcheon base and slide the escutcheon base upward slightly.
  • Page 32 3. When replacing the silver escutcheon sheet, (NN-V621MB) ensure that the escutcheon sheet is earthed to the back-plate via the earth strip. 4. When replacing the stainless escutcheon asemmbly, (NN-V671SB), ensure that the stainless facia is earthed to the escutcheon back plate via the earth spring.
  • Page 33 Grounding of the stainless fascia 8.4. Low voltage transformer and/or power relays (RY1) Note Be sure to ground your body to discharge any static before handling the DPC. 1. Using a solder wick or a de-soldering tool and a 30W soldering iron, carefully remove all solder from the terminal pins of the low voltage transformer and/or power relays.
  • Page 34 7. Remove the two screws holding the fan motor assembly. 8. Detach the orifice assembly and the fan motor assembly from the oven assembly. 9. Remove the fan blade from the fan motor by pulling outward. Figure 6 Removing the fan motor. 8.6.
  • Page 35 Figure 7 Disassembly of the door. Figure 8 Adjusting the door hinge. 8.7. Turntable Motor 1. Remove the motor cover by breaking off at the 8 spots indicated by the arrows. 2. Disconnect the two lead wires connected to the turntable motor. 3.
  • Page 36 Removing the turntable motor cover. Figure 10 Removing the two scews fixing the turntable motor. 8.8. Quartz Heater 1. Disconnect the lead wires from the heater terminals. 2. Remove one screw holding the heater supports. 3. Remove the heater. Figure 11...
  • Page 37 One screw to remove the grill bracket. Figure 12 Removing the grill element. 8.9. Steam Sensor NN-V681 1. Remove 1 screw holding the steam sensor unit 2. Disconnect CN7 connector for the digital programmer circuit board. 3. Remove the exhaust guide from the steam sensor unit. 4.

  • Page 38: Component Test Procedure

    Fitting the new sensor 9. Component Test Procedure Caution 1. High voltage is present at the high voltage terminal of the inverter unit, including the aluminium heat sink. 2. It is not necessary or advisable to attempt to measure this high voltage.
  • Page 39 9.2. Short Switch and Monitor Circuit 1. Unplug the lead wires from the HV inverter primary terminals. 2. Connect the test probes of the ohm meter to these leads. 3. Test the continuity of the short switch with the door open and the door closed using the lowest ohm scale.
  • Page 40 Figure 3 9.6. Inverter Power Supply Unit Warning Do not attempt to make any measurements in the high voltage circuitry of the inverter or magnetron. See troubleshooting of the inverter circuit and magnetron on P.20 to determine if the inverter power supply is still functioning.

  • Page 41: Measurements And Adjustments

    T1 TIME T2 TIME 1 MIN 30 SEC - 4 MIN 8 SEC - 23 SEC 10. Measurements and Adjustments Warning - For continued protection against radiation hazard, replace only with identical parts. - When the 10 amp fuse is blown due to the operation of the short switch, you must replace the primary latch switch and short switch.

  • Page 42: Troubleshooting Guide

    magnetron using the simple method outlined below. Necessary equipment: - 1 liter beaker. - Glass thermometer. - Wrist watch or stop watch. 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.
  • Page 43 Caution 1. Do not try to repair this H.V. Inverter power supply. Replace as a whole unit. When returning the inverter unit pack in the original inverter box. 2. Do not adjust the preset volume on the H.V. Inverter. It is very dangerous to repair or adjust without sufficient test equipment, this circuit handles very high violate and current.
  • Page 44 Troubleshooting (No Operation) Figure 2 Troubleshooting (Fuse is blown) Figure 3 Troubleshooting (Other problems) Figure 4...
  • Page 45 Troubleshooting Inverter by Input out voltage Figure 5...
  • Page 46 Troubleshooting Inverter by Microwave Oven Input Current 12. Digital Programmer Circuit Troubleshooting Guide...
  • Page 47 Figure 2 How to test the semiconductors 13. Main Parts List 1. Part numbers are indicated on most mechanical parts. Please use these part numbers for part orders. Do not use the description of...
  • Page 48 the part. Important safety notice 1. Components identified by mark have special characteristics important for safety. When replacing any of these components, use only the manufacturers specified parts. Part Number Remarks Ref. Part Name and Description E900C6520BP POWER SUPPLY CORD AEE9108A20GN POWER CORD CLIP ANE6230P10GN...

  • Page 49: Exploded View

    Part Number Remarks Ref. Part Name and Description XST4+W5V SCREW E200A4N50BP OVEN CAVITY NN-V681WB E200A4N30BP OVEN CAVITY NN-V671SB NN-V621MB NN-V651WB NN-V651CB E64604N30BP HEATER SUPPORT BRACKET E03594N30GP LEADWIRE GRILL LINK E64504N50BP SENSOR COVER B NN-V681WB E607S7050AP STEAM SENSOR NN-V681WB E407F8010BP STEAM SENSOR ASSY NN-V681WB E00064080BP WARNING LABEL...

  • Page 50: Escutcheon Base

    Ref. Part No. Part Name & Description Remarks Part No. E30014N30HBP DOOR A NN-V681WB NN-V651WB E30014N30NBP DOOR A NN-V621MB E30014N30BP DOOR A NN-V651CB E302A4N30SBP DOOR A ASSEMBLY NN-V671SB E31464N30BP DOOR SCREEN B NN-V681WB NN-V621MB NN-V651WB NN-V651CB E302K4N30BP DOOR E ASSEMBLY E30214000AP DOOR KEY SPRING E30184L00GS...
  • Page 51 Ref. No. Part No. Part Name & Description Remarks E80724L10HBP DOOR OPENING BUTTON NN-V681WB NN-V651WB E80725D00SBP DOOR OPENING BUTTON NN-V671SB E80724L10NBP DOOR OPENING BUTTON NN-V621MB E80724L10BP DOOR OPENING BUTTON NN-V651CB E80378AOAG SPRING E80344L10HBP ESCUTCHEON BASE NN-V681WB NN-V651WB E80344L10BP ESCUTCHEON BASE NN-V651CB E80344L10NBP ESCUTCHEON BASE...

  • Page 52: Packing And Accessories

    Ref. No. Part No. Part Name & Description Remarks E83375D00BP ESCUTCHEON SHEET NN-V651CB E80074L00SGS SPRING NN-V671SB NOTE: Please order the escutcheon base and name plate together NOTE: When replacing the silver escutcheon sheet ensure it is earthed to the escutcheon back plate via the earth strip NOTE: When replacing the stainless escutcheon assembly, be sure that the fascia is earthed to the back plate via the earth spring.
  • Page 53 Ref. No. Part No. Part Name & Description Remarks E06435870SP WIRE RACK FOOT BLACK E060V6520BP WIRE RACK E01084N30BP TRAY PACKING E06015020UP ENAMEL TRAY E06014N30BP GLASS TRAY E290D4N30BP ROLLER RING UNIT E00035D00BP COOK BOOK E01695750BP SERVICE CENTER LIST E01134N30BP TRAY STYROL E01025D10HBP CARTON BOX NN-V681WB...

  • Page 54: Key Board Matrix

    SIDE STRIPS REF NO 2 Trim kit. No. TOP AND BOTTOM STRIP Remarks REF NO 1 NN-TKV69W E1603A510HBP E1601A510HBP NN-V681WB NN- V651WB NN-TKV69C E1603A510BP E1601A510BP NN-V651CB NN-TKV69M E1603A510NBP E1601A510NBP NN-V621MB Trim kit assemmbly Instruction E0003A4N30BP 19. Key Board Matrix...

  • Page 55: Digital Programmer Circuit

    20. Digital programmer Circuit...
  • Page 56 DPC Schematic 1...

  • Page 58: Digital Programmer Circuit Parts List

    DPC Schematic 2 21. Digital programmer circuit parts list 21.1. E603L5D10BP DPC AU Remarks Ref. No. Part No. Part Name & Description R180 ERDS2TJ361T 360R Carbon Resistor D40,D41 AESS133T-77 Diode D180-D182 AESQTLGE260T Green LED CX320 EF0EC8004T4 Ceramic Resonator SW40-SW51 EVQ11L05R Push Switch SW53-SW63 C110 C20 C40-...
  • Page 59 Remarks Ref. No. Part No. Part Name & Description ZD10 AESZMTZ5R6B Zener Diode D222-D223 AESS133T-77 Silicon Diode AESS133T-77 Silicon Diode D220 AESS1N4003E Silicon Diode C330 ECBT1H681KB5 680PF Capacitor R25,R26 ERDS1FJ563T 56K 1/2 Watt Resistor R220 R232 ERDS2TJ103T 10K Resistor R11 R227 R228 ERDS2TJ104T 100K Resistor R231 ERDS2TJ102T...
  • Page 60 Remarks Ref. No. Part No. Part Name & Description R180 ERDS2TJ361T 360R Carbon Resistor D40,D41 AESS133T-77 Diode D180-D182 AESQTLGE260T Green LED CX320 EF0EC8004T4 Ceramic Resonator SW40-SW51 EVQ11L05R Push Switch SW53-SW63 C110 C20 C40- AECU1F103Z50 10nF Chip Capacitor C220 C221 AECU1F104Z25 100nF Chip Capacitor C222 C224 C22 R111-113 R20...
  • Page 61 Ref. No. Part No. Part Name & Description Remarks ZD10 AESZMTZ5R6B Zener Diode D222-D223 AESS133T-77 Silicon Diode AESS133T-77 Silicon Diode D220 AESS1N4003E Silicon Diode C330 ECBT1H681KB5 680PF Capacitor R25,R26 ERDS1FJ563T 56K 1/2 Watt Resistor R220 R232 ERDS2TJ103T 10K Resistor R11 R227 R228 ERDS2TJ104T 100K Resistor R231 ERDS2TJ102T...

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