Sharp R-380LS User Manual

R380L(W)
10 – 1
R380L(W)
Service Manual
CHAPTER 10. PRECAUTIONS FOR USING LEAD-FREE SOLDER
1. Employing lead-free solder
The “Main PWB” of this model employs lead-free solder. This is indicated by the “LF” symbol printed on the PWB and in the service manual. The suffix
letter indicates the alloy type of the solder.
Example:
2. Using lead-free wire solder
When repairing a PWB with the “LF” symbol, only lead-free solder should be used. (Using normal tin/lead alloy solder may result in cold soldered
joints and damage to printed patterns.)
As the melting point of lead-free solder is approximately 40°C higher than tin/lead alloy solder, it is recommend that a dedicated bit is used, and that
the iron temperature is adjusted accordingly.
3. Soldering
As the melting point of lead-free solder (Sn-Ag-Cu) is higher and has poorer wettability, (flow), to prevent damage to the land of the PWB, extreme
care should be taken not to leave the bit in contact with the PWB for an extended period of time. Remove the bit as soon as a good flow is achieved.
The high content of tin in lead free solder will cause premature corrosion of the bit. To reduce wear on the bit, reduce the temperature or turn off the
iron when it is not required.
Leaving different types of solder on the bit will cause contamination of the different alloys, which will alter their characteristics, making good soldering
more difficult. It will be necessary to clean and replace bits more often when using lead-free solder. To reduce bit wear, care should be taken to clean
the bit thoroughly after each use.
Indicates lead-free solder of tin, silver and copper

Sharp R-380LS Specifications

General

Brand	Sharp
Model	R-380LS
Category	Microwave Oven
Language	English

Summary

Chapter 1. Before Servicing

General Important Information and Safety Warnings

Details essential safety guidelines, including earthing, microwave radiation, and operational precautions.

Chapter 2. Warning to Service Personnel

High Voltage and Microwave Safety Procedures

Outlines critical safety protocols, capacitor discharge, and microwave energy avoidance for service technicians.

Chapter 5. Operation Sequence

Microwave Cooking and Sensor Operation Sequences

Explains sequences for high cooking, medium levels, and sensor cooking operations.

Chapter 7. Troubleshooting Guide

Problem Diagnosis and Component Fault Finding

Provides a systematic guide to identify problems and check faulty parts based on symptom and condition.

Chapter 8. Test Procedures

Magnetron and High Voltage Component Testing

Details test procedures for the magnetron, power transformer, HV rectifier, and capacitor.

Switch, Fuse, Motor, and Filter Testing Procedures

Control Panel and Key Unit Diagnostic Tests

Relay, PWB, and AH Sensor System Checks

Describes tests for relays, PWB foil patterns, and the AH sensor, including control unit interaction.

Chapter 9. Touch Control Panel Assembly

Absolute Humidity Sensor Circuitry and Operation

Touch Control Panel Servicing and Precautions

Chapter 11. Component Replacement and Adjustment Procedure

Pre-Service Safety Checks and Warnings

Lists essential safety checks and warnings to be followed before performing any maintenance.

High Voltage and Magnetron Component Replacement

Provides procedures for removing and replacing HV rectifier, capacitor, fuse, and magnetron.

Switch Adjustment and Door Assembly Replacement

Chapter 12. Microwave Measurement

Microwave Leakage Test Requirements and Procedure

Details the requirements and preparation for conducting a microwave leakage test.

Chapter 13. Circuit Diagrams

CPU Unit, LCD, and Printed Wiring Board Diagrams