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Panasonic Inverter NN-A574SBBTQ User Manual

Panasonic Inverter NN-A574SBBTQ
23 pages
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HAD0608002C2
Microwave Oven
NN-A574SBBTQ
NN-A554WBBTQ
NN-A524MBBTQ
Power source 230-240VAC Single Phase 50Hz
Power requirements Microwave 1180W
Grill 1380W
Convection 1390W
Micro / Grill Combi 2380W
Micro / Conv Combi 2390W
Output (IEC60705) Microwave 1000W
Grill 1300W
Convection 1300W
Microwave frequency 2450 Mhz
Timer 99 min 99 second
Oven cavity size 27L
Outside dimensions 510mm(W) x 390mm(D) X 305MM (H)
Inside dimensions 359mm(W) X 352mm(D) x 217mm(H)
Weight 13Kg
Specifications subject to change without notice
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Panasonic Inverter NN-A574SBBTQ Specifications

General IconGeneral
Inverter TechnologyYes
Capacity27 Liters
Power Consumption1350 W
Control TypeTouch Control
TurntableYes
Weight12 kg
GrillNo
ConvectionNo
Auto Cook MenuYes
Child LockYes
Turntable Diameter315 mm
TypeMicrowave Oven
Power Output900 Watts
Microwave Power900 Watts

Summary

Feature Chart

Control Panel Overview

Inverter Circuit High Voltage Warnings

Schematic Diagram of Microwave Oven

Wiring Diagram of Microwave Oven

Operating Sequence Description

Variable Power Cooking Control

Describes how inverter power supply controls output level via pulse width modulated signal from DPC.

Auto Weight Defrost and Cook

Explains operation when auto control features are selected, determining power level and cooking time.

Troubleshooting Cautions and Warnings

Grounding Check Procedures

Ensures the appliance is properly grounded before beginning repair work to avoid electrical hazards.

Inverter Circuit High Voltage Warnings

Highlights dangers of high voltage and temperatures on the inverter PCB and heat sink.

Part Replacement Guidelines

Fuse Replacement Due to Short Switch

Oven Cavity Aperture Safety

Post-Repair Confirmation Checks

Sharp Edges Handling Safety

Magnetron and Inverter Circuit Replacement

Magnetron Replacement

Step-by-step guide for removing and replacing the magnetron, including safety precautions.

Inverter Circuit Board Replacement

Procedure for removing and replacing the inverter PCB, including grounding and support base.

DPC, Transformer, Fan Motor, and Door Replacement

Digital Programmer Circuit (DPC) and Key Board Replacement

Procedure for removing DPC, membrane keyboard, and escutcheon, with static discharge precautions.

Low Voltage Transformer and Power Relay Replacement

Guidance on replacing low voltage transformer and power relays, emphasizing static discharge.

Fan Motor Replacement

Steps for removing the fan motor assembly and fan blade from the microwave oven.

Door Assembly Replacement

Procedure for removing and replacing the door assembly components, ensuring proper fitment.

Turntable Motor and Pulley Mechanism Replacement

Turntable Motor Replacement

Steps for removing the turntable motor, including cover, wires, and screws.

Pulley Mechanism Component Removal

Procedure for removing pulley belt, heater hood, pulley A, thermistor, and motor bracket.

Component Testing Procedures

Latch Switch and Power Relay Continuity Test

Tests continuity of primary/secondary latch switches and power relay B using an ohm meter.

Short Switch and Monitor Circuit Test

Tests continuity of the short switch and monitor circuit with the oven door open and closed.

Magnetron Filament and Case Continuity Test

Checks magnetron filament continuity and case for shorts to diagnose faults.

Push Button Keyboard Continuity Test

Checks continuity of DPC AU switch terminals by tapping keyboard pads.

Inverter Power Supply Unit Caution

Advises against repairing the inverter power supply and recommends replacement as a unit.

High Voltage Inverter Circuit Measurement Warning

Measurements and Adjustments

Latch Switch Installation and Adjustment

Instructions for mounting and adjusting latch switches, ensuring correct door closure and play.

Microwave Output Measurement Procedure

Simple method to test microwave output power using water load and measuring temperature rise.

General Troubleshooting Guidelines

Troubleshooting No Operation and Blown Fuse

Troubleshooting No Operation Faults

Table for diagnosing no operation, no display, no key input, and no microwave oscillation.

Troubleshooting Blown Fuse Issues

Table for diagnosing a blown 10A fuse, identifying causes like short circuits and faulty components.

Troubleshooting Other Problems and Inverter Voltage Issues

Troubleshooting Other Operational Problems

Troubleshooting table for low output, buzzing, turntable issues, and operation stopping during cycles.

Troubleshooting Inverter Shut Down by Input Voltage

Procedure for troubleshooting inverter shut down by monitoring input voltage and using self-test mode.

Troubleshooting Inverter Input Current

Digital Programmer Circuit Troubleshooting

Semiconductor Testing Using Resistance Meter

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