Sharp KB-6014LS

1
KB-6014LS
KB-6014LK
KB-6014LW
In the interest of user-safety the unit should be restored to its original condition and only parts identical to those specifi ed should
be used.
WARNING TO SERVICE PERSONNEL:
This service manual is intended for use by persons having electrical and mechanical training and a level of
knowledge of these subjects generally considered acceptable in the appliance repair trade. Sharp Electronics
Corporation cannot be responsible, nor assume any liability, for injury or damage of any kind arising from the
use of this manual.
Microwave ovens contain circuitry capable of producing very high voltage and current. Contact with the
following parts may result in a severe, possibly fatal, electrical shock. (High Voltage Capacitor, High Voltage
Power Transformer, High Voltage Rectifi er and Heat sink etc., and Magnetron, High Voltage Harness etc..)
S56M262KB6014
KB-6014LS
KB-6014LK
KB-6014LW
MICROWAVE DRAWER
MODELS
SERVICE MANUAL
TABLE OF CONTENTS
Page
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO
AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY ..................... INSIDE FRONT COVER
BEFORE SERVICING ....................................................................................................... INSIDE FRONT COVER
WARNING TO SERVICE PERSONNEL ................................................................................................................. 3
MICROWAVE MEASUREMENT PROCEDURE ..................................................................................................... 4
FOREWORD AND WARNING ............................................................................................................................... 5
PRODUCT SPECIFICATIONS ............................................................................................................................... 6
SCHEMATICS ...................................................................................................................................................... 10
TEST PROCEDURES .......................................................................................................................................... 11
TOUCH CONTROL PANEL ASSEMBLY .............................................................................................................. 19
MICROWAVE DRAWER DISASSEMBLY ............................................................................................................. 27
WIRING DIAGRAMS ............................................................................................................................................ 33
PRINTED WIRING BOARDS ............................................................................................................................... 34
PARTS LIST ......................................................................................................................................................... 38
PACKING AND ACCESSORIES .......................................................................................................................... 43
This document has been published to be used for after sales service only. The contents are subject to change without notice.
SHARP ELECTRONICS CORPORATION
KB-6014LS pictured
Microwave Drawer

Sharp KB-6014LS Specifications

General

Type	Microwave Oven
Wattage	1000W
Power Output	1000W
Voltage	120V
Frequency	60Hz
Color	Stainless Steel

Summary

Microwave Safety Precautions

Pre-Servicing Checks

Essential checks before performing microwave servicing and repairs.

Service Personnel Safety Warnings

High Voltage Hazard Awareness

Warning about severe electrical shock from high voltage components during servicing.

Foreword and Introduction

Manual Purpose and Scope

This manual provides service information for microwave drawer models.

Microwave Drawer Specifications

Technical Specifications Overview

Details on power, dimensions, frequency, and control features.

General Information

Grounding and Electrical Safety

Guidance on proper grounding for electrical safety and hazard prevention.

Oven Operation Details

Operating Sequence Description

Explanation of component functions during various oven operating states.

Cooking Modes and Power Levels

Description of cooking conditions and variable power level settings.

Sensor Cooking Function

Sensor Operation and Cooking Sequence

How the sensor detects moisture and calculates cooking parameters.

Schematics and Diagrams

Off Condition Circuit Schematic

Electrical schematic for the microwave drawer when in the off state.

Test Procedures

Touch Control Panel Assembly Tests

Tests for touch control panel, keyboard unit, and control unit functionality.

Key Unit and Relay Tests

Procedures for testing the key unit and various relays (RY1-RY5).

Defrost and Fuse Troubleshooting

Testing the defrost function and troubleshooting blown fuses on the PWB.

Sensor and Output Power Tests

Testing AH sensor, water load cooking, and sensor/control unit methods.

Control Unit Checking Procedure

Procedure to check the control unit's functionality using a dummy resistor circuit.

Magnetron, Output Power, and Thermal Tests

Testing magnetron assembly, microwave output, and thermal cut-out.

Interlock, Stop, and Monitor Switch Tests

Testing secondary interlock, stop, and monitor switches for proper operation.

Monitor Fuse and Transformer Tests

Testing blown monitor fuses and power transformer resistance.

Touch Control Panel Overview

Control Panel Unit Structure

Overview of the key unit, control unit, and power unit within the panel.

LSI Description and Signals

LSI Pin Signal Table

Detailed listing of LSI pin functions, signals, and their descriptions.

Humidity Sensor Circuit Details

Humidity Sensor Operation

Explanation of the humidity sensor's working principle and its role in cooking.

Touch Control Panel Servicing

Handling Sensitive Components

Precautions for handling CMOS LSI and preventing static discharge.

Servicing with External Power

Procedure for servicing the touch panel using an external power source.

Lead-Free Solder Precautions

Soldering Best Practices

Guidelines for effective and safe soldering with lead-free solder.

Component Replacement Procedures

High Voltage and Microwave Exposure Warnings

Critical warnings for safe component replacement and operation.

Microwave Drawer Disassembly

Initial Drawer Removal Steps

Steps for safely removing the microwave drawer from its housing.

Power Cord and Switch Servicing

Procedures for replacing the power cord and servicing switches.

Switch Adjustment and Drawer Alignment

Adjusting switches and aligning the drawer for proper operation.

Drawer Assembly and Slide Rail Removal

Steps for removing drawer assembly, choke cover, and slide rails.

Switch Angle and Actuator Adjustments

Procedures for removing and adjusting switch angles and actuators.

Drawer Gear and Rack Gear Servicing

Procedures for removing and installing auto drawer gear and rack gear.

Microwave Drawer Wiring Diagram

Overall Wiring Schematic

Diagram illustrating all internal wiring connections of the microwave drawer.

Control Panel Parts List

Control Panel Component Breakdown

List of parts for the control panel assembly.

Bottom Cover Parts List

Bottom Cover Component Breakdown

List of parts for the bottom cover assembly.

Microwave Drawer Parts List

Major Component Parts List

List of key components such as transformer, magnetron, and motors.

Accessory and Miscellaneous Parts List

List of accessory parts including louvers, angles, and power cords.

Packing Parts List

Shipping and Packaging Components

List of items included for packing and shipping the unit.