Table of Contents
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Power source
Power requirements
Output (IEC60705)
Microwave frequency
Timer
Oven cavity size
Outside dimensions
Inside dimensions
Weight
Specifications subject to change without notice
230-240VAC Single Phase 50Hz
Microwave 1265W
Grill 1325W
Convection 1330W
Micro / Grill Combi 2400W
Micro / Conv Combi 2405W
Microwave 1000W
Grill1300W
Convection 1300W
2450Mhz
99 min 99 second
27L
510mm(W) x 390mm(D) X 305MM (H)
359mm(W) X 352mm(D) x 217mm(H)
13Kg
MOP0407002S2
Microwave Oven
NN-A574SBBPQ
NN-A554WBBPQ
NN-A524MBBPQ
AUTO
Curry/
REHEAT
1h
10min
Chinese
Pasta/
1min
10sec
Casserole
AUTO
icro Power
Fish/Veg
COOK
Grill 1-2-3
Jacket
Potatoes
Con ection
Potato
Products
Combination
Chicken
CHAOS
Pizza
elay/
g/ lb oz
up
Stand
Clock
down
Stop/Cancel
Start
-A S
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Table of Contents
Troubleshooting
Related Manuals for Panasonic NN-A574SBBPQ
Summary of Contents for Panasonic NN-A574SBBPQ
- Page 1 MOP0407002S2 Microwave Oven NN-A574SBBPQ NN-A554WBBPQ NN-A524MBBPQ AUTO Curry/ REHEAT 10min Chinese Pasta/ 1min 10sec Casserole AUTO icro Power Fish/Veg COOK Grill 1-2-3 Jacket Potatoes Con ection Potato Products Combination Chicken CHAOS Pizza elay/ g/ lb oz Stand Clock down Stop/Cancel...
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Page 2: Table Of Contents
! WARNING This service information is designed for experienced repair technicians only and is not designed for use by 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 by electricity must be serviced or repaired only by expe- rienced proffesional technicians. -
Page 3: Feature Chart
2 Feature Chart Function All Models Microwave Grill Convection Combi Weight reheat Weight cook Weight combination Weight defrost Auto Preheat Delay/Stand Kg/lb Stage Cooking Clock 12 h Word prompt English... -
Page 4: Control Panel
3 Control Panel Control Panel NN-A554/A524/A574* Display Window Time Pads Auto Weight Microwave Programs Auto Weight Combination Programs Auto Weight Defrost Programs (Chaos Defrost) Microwave Power Pad Grill Pad AUTO REHEAT Convection Pad Curry Chinese Combination Pad (10) Delay/Stand Pad: Pasta This can be used to delay a cooking Casserole... -
Page 5: Inverter Warnings
4 Inverter Warnings The inverter circuit board supplies the magnetron tube with a very high voltage (4000 volts). HIGH VOLTAGE AREA *1 HEAT SINK DO NOT TOUCH RECTIFIER BRIDGE HOT/HIGH VOLTAGE *2 FILM CAPACITORS CHOKE COIL SAND BAR RESISTOR HIGH VOLTAGE CURRENT TRANSFORMER DIODES PRESET VOLUME *4... -
Page 6: Oven Schematic
5 Schematic Diagram MA NETRON NO E L TER A R A THERMAL CUT OUT (OVEN) R MAR NTER ECON AR NTER MON TOR EV CE ROUN N ROUN AN MOTOR NVERTER VAR T OR O ER RELA T AL RO RAMMER C RCU T MH ) OVEN LAM TURN TA LE MOT OR... -
Page 7: Wiring Diagram
6 Wiring Diagram NOTE WHEN REPLACIN ANY COMPONENT S RECONNECT THE WIRE HARNESS ACCORDIN T O THE COLOURS BELOW COL OURS INDICATED INSIDE BRACKETS () INDICATE THE COLOUR O THE CONNECTOR HOUSIN MA NETRON PRIMARY LATCH SWITCH CAUTION HEAT SINK (WH) (YE) (HOT LI E) -
Page 8: Description Of Operation
7 Description of the Operating Sequence 7.1 Variable power cooking control pad pressed: The output power is controlled by the inverter power 1. The digital programmer circuit determines the supply. The level of output from the inverter circuit is power level and the cooking time and indicates the controlled by a pulse width modulated signal from the operating state in the display. -
Page 9: Cautions When Troubleshooting
8 Cautions to be Observed when Troubleshooting The microwave oven is a high voltage, high current This high voltage inverter power supply supplies very device. Although it is free from danger in ordinary use, high voltage and current to the magnetron. Though it extreme care should be taken during repair. - Page 10 work on or near these inverter circuit components. DO NOT measure the voltage in the high voltage circuit including the filament voltage of the magnetron. H.V.INVERTER(U) WARNING Never touch any circuit wiring during operation. GROUNDING PLATE 8.3 Part replacement CHECK GROUNDING When replacing any component in the microwave oven, always ensure that the power cord is removed from the...
- Page 11 When the appliance is operated with the door hinges or magnetron fixed incorrectly, the microwave leakage can reach more than 5mW/cm . After repair or replac- ing parts, it is very important to check if the magnetron and the door hinges are correctly fixed. 8.7 Sharp edges Please use caution when unpacking, installing or mov- ing the unit, as some exposed edges may be sharp to...
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Page 12: Part Replacement Procedure
9 Part Replacement Procedure 9.1 Magnetron 4. Remove the 1 screw holding the earth wire to the magnetron. 1. Discharge the high voltage capacitors on the 5. Remove the connector CN701 and CN702 from the inverter circuit. inverter PCB.figure 8 2. - Page 13 9.3 Digital Programmer Circuit (DPC) 1. Carefully remove all solder from the terminal pins of and membrane key board. the low voltage transformer / power relays using a NOTE: Ground any static electric from your body before 30W soldering iron and a solder sucker. handling the digital programmer circuit (DPC).
- Page 14 After replacing component parts of the door, fol- low the instructions below for proper installation and adjustment of the door, this is to prevent microwave leakage. 1. When mounting the door to the oven, adjust the door parallel to the bottom of the oven face plate by adjusting the upper hinge.
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Page 15: Component Test Procedure
10 Component Test Procedure Caution 3. Check the continuity between each filament termi- nal and the magnetron case, a good magnetron ∞ • The inverter circuit operates at high voltages. indicates infinite resistance. • Never attempt to measure the high voltage on the inverter circuit. - Page 16 DANGER HIGH VOLTAGE AND TEMPERATURE (HOT/LIVE) HEAT SINK HEAT SINK RECTIFIER BRIDGE CHOKE COIL FILM CAPACITORS SAND BAR RESISTOR HIGH VOLTAGE CURRENT TRANSFORMER DIODES PRESET VOLUME (DO NOT ADJUST) HIGH VOLTAGE CONTROL BOARD CAPACITORS WITH CUSTOM IC CN 702 PHOTOCOUPLER HIGH VOLTAGE TRANSFORMER CN 701 HIGH VOLTAGE REMAINS IN...
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Page 17: Measurements And Adjustments
11 Measurements and Adjustments Warning 4. Stir the water again and read the temperature of the water. (Record as T2). • Only replace parts with parts from the original man- 5. The normal temperature rise at the high power posi- ufacturer. -
Page 18: Troubleshooting Guide
12 Troubleshooting Guide Caution 1. Do not try to repair the H.V. Inverter power supply. Replace the inverter circuit board as a complete unit. 2. Do not adjust the preset volume on the Inverter. It is very dangerous to repair or adjust without special test equiptment, the inverter handles very high voltage and current. - Page 19 12.1 Troubleshooting (no operation) Symptom Cause Correction 1. Oven is dead. 1. Open or loose lead wire harness. Fuse is OK 2. Open low voltage transformer. No display and no operation at all. 3. Defective DPC AU or DPC DU 2.
- Page 20 12.3 Troubleshooting (other problems) Symptom Cause Correction 1. Microwave output is low. 1. Decrease in power source volt- Consult electrician. Oven takes a long time to cook food. age. Refer to output test procedures. 2. Open or loose wiring of magne- tron filament circuit causing inter- mittent oscillation.
- Page 21 DANGER H97, H98 appears in HIGH the display window. VOLTAGE Open Check magnetron *Check the continuity of the magnetron Magnetron* filament continuity filament. Check the fialment is not shorted to the magnetron case.. DPC board/Power relay Check Inverter input AC Loose relay wiring voltages at CN702 Latch switch...
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Page 22: Digital Programmer Circuit
DANGER H97, H98 appears in HIGH the display window. VOLTAGE DPC board/Power Relay Less than 0.4A Loose wiring. Check oven input Latch Switch. current. DPC control signal More than 0.5A *Check the continuity of the magnetron Open Check magnetron filament. Check the filament is not shorted to the Magnetron* filament continuity. - Page 23 Microwave oven shuts down Unplug CN702 connec- Abnormal 1. Latch switch between 15 - 33 seconds. tor and measure the 2. DPC/Power relay Set the microwave oven to test voltage between the Normal Step 2 mode terminlas Set to high power 1 minute. Unplug CN703 connec- Abnormal H97 or H98 appears in the dis-...