Related Manuals for Panasonic NN-A860CB
Summary of Contents for Panasonic NN-A860CB
- Page 1 Order Number MOP00100020C2 Microwave Oven NN-A890WB / NN-A860WB / NN-A860CB EPG Continental Europe UPG France SPECIFICATIONS...
- Page 3 2000 Matsushita Electric Industrial Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law.
- Page 4 1. Inverter Warning The inverter board looks like a regular PCB, however, this PCB drives the magnetron tube using very high voltages and current. It has 1. Very high voltage and high current 2. An Aluminium heat sink that becomes very hot 3.
- Page 5 Inverter Gounding Figure 2 Inverter PCB layout 2. Feature Chart Function NN-A890WB NN-A890WB NN-A860WB NN-A860WB NN-A860CB NN-A860CB Microwave Grill Convection Combination Sensor reheat Sensor cook Sensor combination Weight defrost Weight combination Weight cook Stage cooking Delay/Stand More/Less Clock...
- Page 6 Function NN-A890WB NN-A890WB NN-A860WB NN-A860WB NN-A860CB NN-A860CB Word prompt French French Step by Step *1 None, Dutch, French, Italian, English 3. Control Panel 4. Operation And Digital Programmer Circuit Test Procedure 4.1. Word Prompting 4.2. Setting the Clock 4.3. Microwave Cooking...
- Page 7 4.4. Auto Weight Defrost 4.5. Delay Stand 4.6. Delay Start...
- Page 8 4.7. Child Lock 4.8. Grill Operation 4.9. Convection Operation 4.10. Turbo Bake Operation...
- Page 9 4.11. Combination Cooking (Convection and Microwave) 4.12. Combination Cooking CGrill and Microwave)
- Page 10 4.13. Combination Cooking (Turbo Bake and Microwave) 4.14. Auto Weight Cook Programs (NN-A860WB, NN-A860CB)
- Page 11 4.15. Auto Weight Cook Program NN-A890WB) 4.16. Auto Sensor and Sensor Combi Programs (NN-A890WB) 5. Schematic Diagram 6. Wiring Diagram...
- Page 12 7. Description of Operating instruction 7.1. Variable power cooking control The HIGH VOLTAGE INVERTER POWER SUPPLY controls the output power by a signal from the digital Programmer circuit DPC. The power relay (RY1) turns on to supply power to the inverter circuit.
- Page 13 Note: After auto cooking if the oven temperature is over the predetermined temperature the fan motor rotates to cool the oven and its components. Auto Weight Defrost NN-A890WB NN-A860WB NN-A860CB Category 1st Touch Cooking Weight...
- Page 14 1200 28m 26s 16.Tart 4 - 5 17.Tart 6 - 8 18.Tart 8 - 10 19.Tart 10 - 12 Auto weight Cook NN-A860WB NN-A860CB Category 1st Touch Cooking Weight Time 1.Fresh Vegatables 12m 36s 2.Fresh Fish 3.Frozen Bread 4m 18s 4.Frozen Pizza...
- Page 15 3. When the temperature drops below the predetermined temperature, the digital programmer circuit supplies power to power relay RY5 resulting in the convection heater turning on. Note: After the convection process, if the oven temperature is higher than the predetermined temperature, the fan motor rotates to cool the electronic components and the oven.
- Page 16 elements are operated alternatively whilst the oven temperature is above the selected level. Convection And Microwave Combination Duty Cycles Convection Heater Micropower 100 - 250 C OUTPUT ON Medium 600W 440W Simmer 440W Warm 440W Grill And Microwave Combination Duty Cycles Grill Heater Micropower OUTPUT ON...
- Page 17 Convection and microwave duty cycles Figure 2 Grill and microwave duty cycles Grill,Convection and microwave duty cycles 7.6. One touch Auto sensor cooking NN-A890WB Auto sensor cook is a revolutionary way to cook by microwave without setting a power level or selecting a time.
- Page 18 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 19 Auto sensor cooking 8. Cautions to Be Observed When Troubleshooting Unlike many other appliances, the microwave oven is a high voltage, high current is 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 20 HV Inverter warning WARNING FOR 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, the inverter grounding bracket must be connected to the chassis. If the inverter board is not grounded it will expose very high voltages and cause extreme DANGER! Be sure that the inverter circuit is properly grounded via the inverter earth bracket.
- Page 21 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 22 3. When replacing faulty switches, be sure the mounting tabs are not bent, broken or deficient in their ability to hold the switches. 8.5. 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.
- Page 23 9. Parts Replacement Procedure 9.1. Magnetron 1. Discharge the high voltage capacitors on the inverter circuit. 2. Remove the five screws shown in figure 1 3. Disconnect the two high voltage leads from the magnetron 4. Remove the four screws holding the magnetron as shown in figure 2 NOTE: After replacing the magnetron, tighten the mounting screws making sure that there is no gap between the waveguide and the magnetron to prevent microwave leakage.
- Page 24 Screws to remove the magnetron 9.2. Inverter power supply (U) 1. Discharge the high voltage capacitors 2. Unplug the H.V. Lead wires from the magnetron 3. Remove the connector CN701 and CN702 from the inverter PCB 4. Remove the two screws holding the inverter base to the chassis (See figure 3) 5.
- Page 25 sink because it is hot. Figure 3 Removal of the inverter PCB Figure 4 Disconnecting the PCB lock connector 9.3. Digital Programmer Circuit (DPC) and membrane key board. NOTE: Ground any static electric built up on your body before handling the DPC. 1.
- Page 26 2. Peel away the display window from the inside of the base. 3. Remove the membrane assembly by pushing from the inside of the base and then peeling away from the outside surface. NOTE: 1. The escutcheon key board is attached to the escutcheon base with double faced adhesive tape.
- Page 27 Note Do not use a soldering iron or de soldering tool of more than 30 watts on DPC contacts 9.5. Fan Motor 1. Disconnect the two lead wires from the fan motor terminals 2. Remove the power cord by removing the two wires from the noise filter and the ground connection from the oven chassis.
- Page 28 instructions below for proper installation and adjustment so as to prevent 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 in the direction necessary for proper alignment.
- Page 29 Removing the Turntable motor cover Figure 9 Two screws to remove the turntable motor 9.8. Quartz Heater 1. Remove the sensor cable from the DPC connector CN7. 2. Remove the exhaust guide A by removing the two screws shown in figure 10. 3.
- Page 30 Removing the exhaust guide and grill cover Figure 11 Removing the screws holding the grill heater Figure 12 Removing the grill element 9.9. Convection Element And Circulation Fan Motor 1. Remove one screw to remove the the exhaust guide D. Figure 13. 2.
- Page 31 4. Remove the power cord. 5. Remove the wire terminals from the circulation fan motor and the convection heater element. 6. Remove the four screws from the oven base. Figure 15 7. Carefully place hte oven onto its base and remove the backplate. 8.
- Page 32 Removing the oven back plate Figure 15 Removing the base plate Figure 16...
- Page 33 Removing the circulation motor 10. 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 34 secondary latch switch. 3. Test the continuity of the switches with the door open and closed with an ohm meter on the lowest scale. Normal continuity readings should be as followed. Door Open Door Closed Primary Latch infinite (Close) Switch (Open) Secondary infinite...
- Page 35 10.4. Push Button Keyboard Check the continuity between the switch terminals, by tapping an appropriate pad on the keyboard. The keypad matrix is shown on Key Board Matrix. 10.5. Inverter Power Supply Caution DO NOT try to repair this inverter power supply). Replace as a whole H.V.
- Page 36 See troubleshooting of the inverter circuit and magnetron on page 27 to determine if the inverter power supply is still functioning. 10.7. Temperature Sensor A temperature sensor is mounted on the rear of the oven. The resistance reading across the thermistor should read 300K ohm within a temperature range of 10 to 30 degrees centigrade.
- Page 37 mounting tabs are not bent, broken or otherwise deficient in their ability to hold the switches. - Refer to the schematic and wiring diagram to ensure proper connection 11.1. Installation of primary latch switch, secondary latch switch and short switch. 1.
- Page 38 (Recorded as T2) 4. The normal temperature rise at the high power position for each model is shown in the table. (Figure 2) Figure 1 Adjustment of latch switch assembly RATED OUTPUT TEMPERATURE RISE 1000W 8°C 12. Troubleshooting Guide Fuses are not blown...
- Page 40 Fuses are not blown...
- Page 43 Other problems...
- Page 46 Inverter circuit troubleshooting...
- Page 49 Alternative method for toubleshooting the inverter circuit 13. Digital Programmer Troubleshooting Guide...
- Page 51 How to check semiconductors 14. Exploded View...
- Page 52 15. 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 the part. Important safety notice 1. Components identified by mark have special characteristics important for safety.
- Page 53 Ref. No. Part No. Part Name & Description Remarks E00069000EP WARNING LABEL E41199000BP EXHAUST GUIDE D E10589000BP BACK PANEL COVER E605A4V20BP THERMISTER AEE9108A20GN HOLDER (P CLIP) E900C4V20GP POWER CORD SUPPLY E67597550GP FUSE 10A E607X4V20BP NOISE FILTER E400A4760JP FAN MOTOR AEE6230P10GN FUSE 16A E09020000AP CUSHION RUBBER...
- Page 54 E607F9000BP HEATER COVER E22429000BP ADIABATIC MATERIAL E20339000BP HEATER COVER B E41079000GP EXHAUST GUIDE B E09230000AQ CUSHION RUBBER E490S8020GP CONV MOTOR E22399000BP CIRCUALTION FAN E110D4V30HBP OUTER PANEL NN-A890WB NN-A860WB E110D4V30BP OUTER PANEL NN-A860CB E01505870EP WARNING LABEL NN-A890WB NN-A860WB 16. Door Assembly...
- Page 55 Ref. No. Part No. Part Name & Description Remarks E302A4V20HGP DOOR A ASSYM NN-A890WB NN-A860WB E302A4V20GP DOOR A ASSYM NN-A860CB E30214000AP DOOR KEY SPRING E30188000BP DOOR KEY A E302K9000BP DOOR E E30859000BP DOOR C E30067300AP HINGE When ordering any door component also order door C, this part may become damaged during dissassembly of the door.
- Page 56 E060V5870SP WIRE RACK LOW E06014N30BP GLASS TRAY E290D5850GP ROLLER RING E01695750BP SERVICE LIST E00034V20UP OPERATING INSTRUCTIONS/ NN-A890WB UPG NN-A860CB UPG NN-A860WB UPG COOKBOOK E000B4V20BP COOKBOOK NN-A890WB EPG NN-A860WB EPG E00034V20EP OPERATING INSTRUCTIONS NN-A890WB EPG NN-A860WB EPG E0212-1520 FOAM SHEET E06015020GP...
- Page 57 Ref. No. Part No. Part Name & Description Remarks E01926430GP PROTECTOR SHEET NN-A860CB UPG 19. REF No 8 E607X4V20BP Noise Filter (U) Ref. No. Part No. Part Name & Description Remarks ERG1SJ753P Resistor C1 & C2 QETJ5225KRP2CE Capacitor C3 & C4...
- Page 58 Trim Model Top And Side strip REF Microwave Oven Model Number Bottom Strip No 2 Number REF No 1 NN-TKA80W E1603A510HBP E1601A540HBP NN-A890WB NN-A860WB NN-TKA80C E1603A510BP E1601A540BP NN-A860CB Instalation Guide A0003A810BP 21. Digital Programmer Circuit Schematic...
- Page 60 22. Key Board Matrix 23. Digital Programmer Circuit Parts 23.1. E603L4V2UP/EP E603L4V3UP/EP DPCAU...
- Page 61 Ref. No. Part No. Part Name & Description J603L 4V2UP J603L 4V2EP J603L C502 AECU1F101J50 100pF Chip Capacitor C40-C48 C110 C20 C441 C570 AECU1F103Z50 10nF Chip Capacitor C501 AECU1F103Z50 10nF Chip Capacitor C220 C221 C222 C224 C21 AECU1F104Z25 100nF Chip Capacitor C130 C500 AECU1F104Z25 100nF Chip Capacitor...
- Page 62 Ref. No. Part No. Part Name & Description J603L 4V2UP J603L 4V2EP J603L JPR1 ERDS2TJ1R0T 1 ohm Carbon Resistor JPR1 ERDS2TJ683T 68K Carbon Resistor JPR1 ERDS2TJ303T 30K Carbon Resistor 23.2. E603Y4V20BP E603Y4V30BP DPC DU Ref. No. Part No. Part Name & Description J603Y 4V20BP J603Y 4V30BP ZD10...
- Page 63 Ref. No. Part No. Part Name & Description J603Y 4V20BP J603Y 4V30BP IC10 ETXMJ197X1BG Switching Power Supply S-4V20 / / / / S-4V30 / SM...