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National NN-C781JF - User Manual

National NN-C781JF
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Service Manual
ORDER NO. SIMMC 0110022C3
E1
Microwave Oven
© 2001 Shanghai Matsushita Microwave
Oven Co.,Ltd
All rights reserved. Unauthorized copying
and distribution is a violation of law.
Specifications:
Power Source:
Power Requirement: Microwave
Heater
Output: Microwave (ICE 705)
Heater
Microwave Frequency:
Timer:
Outside Dimensions:
Oven Cavity Dimensions:
Weight:
Output power: IEC705-88 Test Procedure
Specifications subject to change without notice.
Specifications:
Models:
240V AC Single Phase, 50Hz .......... For KNQ Models
230V-240V AC Single Phase, 50Hz . For MNQ, YNQ Models
220V AC Single Phase, 50Hz .......... For HNE, TNE, YKE, KKE, ZPE Models
220V AC Single Phase, 50/60Hz ..... For SNM Models
120V AC Single Phase, 60Hz .......... For WNT Models
1260W
1550W
1000W
1515W
2450MHz
30min (HIGH) / 99min. 59sec
400mm (W) x 520mm (D) x 312mm (H)
373mm (W) x 373mm (D) x 206mm (H)
15.5kg
NN-C781JF
NN-C781JF
®
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Summary

Microwave Oven Specifications

Safety Precautions and Warnings

General Safety Warnings

Essential safety notices for servicing and operation of the microwave oven.

Microwave Exposure Precautions

Steps to avoid potential microwave radiation exposure during service.

Features and Control Panel

Feature Chart Overview

Summary of the microwave oven's capabilities and functions.

Control Panel Interface

Description of the user interface, buttons, and display.

Operation and Testing Procedures

Operation and Programmer Circuit Tests

Guide to using the oven and testing its digital programmer.

Cooking Mode Operations

Detailed steps for various cooking modes like defrost and sensor cooking.

Technical Diagrams and Schematics

Schematic Diagram

Electrical circuit diagram of the microwave oven.

Wiring Diagram

Visual representation of electrical connections between components.

Operating Sequence Descriptions

Variable Power Cooking Control

Details on how power levels affect cooking performance.

Inverter Power Supply Circuit Function

Explanation of the high-voltage inverter circuit's function.

Troubleshooting Safety Cautions

General Troubleshooting Safety

Safety advice and warnings before and during troubleshooting.

High Voltage and Radiation Hazards

Critical warnings regarding high voltage and microwave radiation hazards.

Disassembly and Parts Replacement

Magnetron and Inverter Replacement Steps

Steps for removing and replacing the magnetron and inverter.

Door and Turntable Motor Replacement

Procedures for replacing the door assembly and turntable motor.

Component Testing and Measurements

Component Testing Procedures

Methods for testing various internal components like switches and diodes.

Microwave Output Measurement

Procedure for measuring the oven's microwave output power.

Troubleshooting Guide

Symptom-Based Troubleshooting

Common oven malfunctions and their likely causes and corrections.

Inverter Circuit Troubleshooting Guide

Specific guidance for diagnosing and repairing inverter circuit issues.

Parts Identification and Lists

Semiconductor Testing Methods

Techniques for checking semiconductors using an ohmmeter.

Inverter Board Parts List

List of specific part numbers for the inverter board.

Assembly Views and Parts Lists

Exploded View

Visual breakdown of the oven showing component locations.

Main Parts List

Comprehensive list of all replaceable parts with part numbers.

Specific Assemblies and Accessories

Door Assembly Details

Step-by-step guide for door disassembly and reassembly.

Packing and Accessories Information

Information on how the oven is packed and included accessories.

Digital Programmer Circuit

Circuit Schematic Diagram

Detailed schematic of the digital programmer circuit.

Circuit Parts List

List of parts specific to the digital programmer circuit.

Summary

Microwave Oven Specifications

Safety Precautions and Warnings

General Safety Warnings

Essential safety notices for servicing and operation of the microwave oven.

Microwave Exposure Precautions

Steps to avoid potential microwave radiation exposure during service.

Features and Control Panel

Feature Chart Overview

Summary of the microwave oven's capabilities and functions.

Control Panel Interface

Description of the user interface, buttons, and display.

Operation and Testing Procedures

Operation and Programmer Circuit Tests

Guide to using the oven and testing its digital programmer.

Cooking Mode Operations

Detailed steps for various cooking modes like defrost and sensor cooking.

Technical Diagrams and Schematics

Schematic Diagram

Electrical circuit diagram of the microwave oven.

Wiring Diagram

Visual representation of electrical connections between components.

Operating Sequence Descriptions

Variable Power Cooking Control

Details on how power levels affect cooking performance.

Inverter Power Supply Circuit Function

Explanation of the high-voltage inverter circuit's function.

Troubleshooting Safety Cautions

General Troubleshooting Safety

Safety advice and warnings before and during troubleshooting.

High Voltage and Radiation Hazards

Critical warnings regarding high voltage and microwave radiation hazards.

Disassembly and Parts Replacement

Magnetron and Inverter Replacement Steps

Steps for removing and replacing the magnetron and inverter.

Door and Turntable Motor Replacement

Procedures for replacing the door assembly and turntable motor.

Component Testing and Measurements

Component Testing Procedures

Methods for testing various internal components like switches and diodes.

Microwave Output Measurement

Procedure for measuring the oven's microwave output power.

Troubleshooting Guide

Symptom-Based Troubleshooting

Common oven malfunctions and their likely causes and corrections.

Inverter Circuit Troubleshooting Guide

Specific guidance for diagnosing and repairing inverter circuit issues.

Parts Identification and Lists

Semiconductor Testing Methods

Techniques for checking semiconductors using an ohmmeter.

Inverter Board Parts List

List of specific part numbers for the inverter board.

Assembly Views and Parts Lists

Exploded View

Visual breakdown of the oven showing component locations.

Main Parts List

Comprehensive list of all replaceable parts with part numbers.

Specific Assemblies and Accessories

Door Assembly Details

Step-by-step guide for door disassembly and reassembly.

Packing and Accessories Information

Information on how the oven is packed and included accessories.

Digital Programmer Circuit

Circuit Schematic Diagram

Detailed schematic of the digital programmer circuit.

Circuit Parts List

List of parts specific to the digital programmer circuit.

National NN-C781JF Specifications

General IconGeneral
TypeConvection Microwave Oven
Capacity27 L
Turntable Diameter315 mm
Voltage230 V
Frequency50 Hz
Pre-set MenusYes
Child LockYes
Warranty1 Year
Power Output1350W (Convection)
Control TypeTouch Control
Cooking ModesMicrowave, Grill, Convection, Combination

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