Table of Contents
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Power source
Power requirements
Output (IEC60705)
Microwave frequency
Timer
Oven cavity size
Outside dimensions
Inside dimensions
Weight
NN-CT867MBPQ
NN-CT857WBPQ
32L
United Kingdom
240V AC Single Phase 50Hz
Microwave 1220W
Grill 1560W
Convection 1350W
Combi 2870W
Microwave 1000W
Grill 1500W
Convection 1250W
2450Mhz
99 min 99 second
32L
530mm(W) x 508mm(D) X 344MM (H)
350mm(W) X 360mm(D) x 250mm(H)
21Kg
© 2007 Matsushita Electric Industrial Co., Ltd. All rights reserved.
Unauthorized copying and distribution is a violation of law.
HAD0707001C2
Microwave Oven
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Table of Contents
Troubleshooting
Related Manuals for Panasonic NN-CT867MBPQ
Summary of Contents for Panasonic NN-CT867MBPQ
- Page 1 HAD0707001C2 Microwave Oven NN-CT867MBPQ NN-CT857WBPQ United Kingdom Power source 240V AC Single Phase 50Hz Power requirements Microwave 1220W Grill 1560W Convection 1350W Combi 2870W Output (IEC60705) Microwave 1000W Grill 1500W Convection 1250W Microwave frequency 2450Mhz Timer 99 min 99 second...
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Page 2: Table Of Contents
NN-CT867MBPQ NN-CT857WBPQ 1 Contents Contents ............2 Inverter Warnings . -
Page 3: Inverter Warnings
NN-CT867MBPQ NN-CT857WBPQ 2 Inverter Warning The inverter board looks like a regular PCB, however, this PCB drives the magnetron tube using very high voltages and cur- rent. It has 1. Very high voltage and high current 2. An Aluminium heat sink that becomes very hot 3. -
Page 4: Control Panel
NN-CT867MBPQ NN-CT857WBPQ 4 Control Panel... -
Page 5: Operation And Digital Programmer Circuit Test Procedure
NN-CT867MBPQ NN-CT857WBPQ 5 Operation And Digital Programmer Circuit Test Procedure... - Page 6 NN-CT867MBPQ NN-CT857WBPQ...
- Page 7 NN-CT867MBPQ NN-CT857WBPQ...
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Page 8: Schematic Diagram
NN-CT867MBPQ NN-CT857WBPQ 6 Schematic Diagram... -
Page 9: Wiring Diagram
NN-CT867MBPQ NN-CT857WBPQ 7 Wiring Diagram Wiring Harness... -
Page 10: Description Of The Operation Sequence
NN-CT867MBPQ NN-CT857WBPQ 8 Description of Operating instruction 8.1. Variable power cooking control 8.3. Auto weight defrost, Auto weight Cook The HIGH VOLTAGE INVERTER POWER SUPPLY controls the output power by a signal from the digital Programmer circuit When an auto control feature is selected and the start pad DPC. - Page 11 NN-CT867MBPQ NN-CT857WBPQ 8.4. Convection Cooking 1. The digital programmer circuit operates the power relays temperature, the digital programmer circuit supplies RY3,RY5 and RY6 in the sequence as shown in the figure power to power relay RY5 resulting in the convection below.
- Page 12 NN-CT867MBPQ NN-CT857WBPQ 8.5. Combination Cooking Convection And Microwave Combination Duty Cycles Convection Heater Micropower Combination cooking is achieved by operating the microwave 100 - 250 C DISPLAY OUTPUT and heater modes together during one cooking cycle. There 360W are three combination modes.
- Page 13 NN-CT867MBPQ NN-CT857WBPQ 8.5.1 convection and microwave duty cycles Figure 1...
- Page 14 NN-CT867MBPQ NN-CT857WBPQ 8.5.2 grill and microwave duty cycles Figure 2...
- Page 15 NN-CT867MBPQ NN-CT857WBPQ 8.5.3 Grill,Convection and microwave duty cycles Figure 3...
- Page 16 NN-CT867MBPQ NN-CT857WBPQ 8.6. One touch Auto sensor cooking Auto sensor cook is a revolutionary way to cook by microwave without setting a power level or selecting a time. All that is nec- Category P1 POWER P2 POWER K FACTOR essary is to select an auto sensor program before starting to STANDARD cook.
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Page 17: Cautions To Be Observed When Troubleshooting
NN-CT867MBPQ NN-CT857WBPQ 9 Cautions to Be Observed When Troubleshooting Unlike many other appliances, the microwave oven is a high voltage, high current device. Although 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 18 NN-CT867MBPQ NN-CT857WBPQ Inverter Grounding Figure 2 Discharging the high voltage capacitors Figure 3 WARNING! DISCHARGE THE HIGH VOLTAGE CAPACITORS For about 30 seconds after the oven is turned off, an elec- tric charge remains in the high voltage capacitors in the inverter power supply circuit board.
- Page 19 NN-CT867MBPQ NN-CT857WBPQ 9.3. When parts must be replaced, 9.6. Confirm after repair remove the power plug from 1. After repair or replacement of parts, make sure that the screws of the oven, etc. are neither loose nor missing. the outlet.
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Page 20: Part Replacement Procedure
NN-CT867MBPQ NN-CT857WBPQ 10 Parts Replacement Procedure 10.1. Magnetron 1. Discharge the high voltage capacitors on the inverter cir- cuit. 2. Remove the five screws shown in figure 1 3. Disconnect the two high voltage leads from the magne- tron 4. Remove the four screws holding the magnetron as shown... - Page 21 NN-CT867MBPQ NN-CT857WBPQ 3. Securely connect the 3 lead wire connectors 4. Make sure that the heat sink has enough space (gap) from the oven. Take care not to touch any lead wire to the aluminium heat sink because it is hot.
- Page 22 NN-CT867MBPQ NN-CT857WBPQ Disconnecting the PCB lock connector Removal of DPC AU and DPC HU Figure 4 Figure 5 10.3. Digital Programmer Circuit (DPC) membrane board. NOTE: Ground any static electric built up on your body before handling the DPC. 1. Disconnect all connectors from the DPC.
- Page 23 NN-CT867MBPQ NN-CT857WBPQ 10.5. Fan Motor proper installation and adjustment so as to prevent exces- sive microwave leakage. 1. Disconnect the two lead wires from the fan motor termi- 1. When mounting the door to the oven, be sure to adjust...
- Page 24 NN-CT867MBPQ NN-CT857WBPQ Note: After breaking off the motor cover, make sure that cut-off portions are properly trimmed off or bent inside so that no sharp edges are exposed. Note: To secure the motor cover use a 4 x 6 screw.
- Page 25 NN-CT867MBPQ NN-CT857WBPQ Removing the screws holding the grill heater Figure 11 Removing the grill element Figure 12...
- Page 26 NN-CT867MBPQ NN-CT857WBPQ 10.9. Convection Element And Circulation Fan Motor 1. Remove one screw to remove the exhaust guide D. Figure 13. 2. Remove the rear heater cover by removing the three screws. Figure 13 3. Remove the temperature sensor by removing the two screws. Figure 14 4.
- Page 27 NN-CT867MBPQ NN-CT857WBPQ Removing the oven back plate Figure 14 Removing the base plate Figure 15...
- Page 28 NN-CT867MBPQ NN-CT857WBPQ Removing the circulation motor Figure 16...
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Page 29: Component Test Procedure
NN-CT867MBPQ NN-CT857WBPQ 11 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 30 NN-CT867MBPQ NN-CT857WBPQ 11.5. Inverter Power Supply Caution DO NOT try to repair this inverter power supply. Replace as a whole H.V. Inverter Unit. Inverter power supply diagram Figure 3 11.6. Inverter Power Supply Unit sor is working, perform the following test.
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Page 31: Measurements And Adjustments
NN-CT867MBPQ NN-CT857WBPQ 12 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 32: Troubleshooting Guide
NN-CT867MBPQ NN-CT857WBPQ 13 Troubleshooting Guide... - Page 33 NN-CT867MBPQ NN-CT857WBPQ Fuses are blown Fuses are not blown Checking the semiconductors using a resistance meter...
- Page 34 NN-CT867MBPQ NN-CT857WBPQ Other problems Inverter circuit troubleshooting 6A5BPQ Alternative method for toubleshooting, the inverter circuit Alternate way to troubleshoot oven with AC Ampere meter used H95, H97, H98, H99 appears in display window a short time after start key is pressed and no microwave oscillation with AC Ampere...
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Page 35: Description Of Operating Instruction
NN-CT867MBPQ NN-CT857WBPQ 14 Description of Operating instruction 14.1. Auto weight defrost, Auto weight Cook When an auto control feature is selected and the start pad pressed: 1. The digital programmer circuit determines the power level and the cooking time and indicates the operating state in the display.