Related Manuals for LG GR-S702
Summarization of Contents
SERVICING PRECAUTIONS
Air Recharging in Compressor
Describes the process of air recharging in a refrigerator's compressor.
1. SPECIFICATIONS
GR-S642 Specifications
Lists technical specifications for the GR-S642 refrigerator model.
GR-S702 Specifications
Lists technical specifications for the GR-S702 refrigerator model.
2. PARTS IDENTIFICATION
Feature Chart
Illustrates and labels various parts of the refrigerator compartment.
3. DISASSEMBLY
Door Disassembly
Details the process for disassembling the freezer and refrigerator doors.
Door Switch Removal
Explains how to remove and disconnect the door switch.
Fan and Fan Motor Disassembly
Provides instructions for disassembling the fan and fan motor assembly.
Defrost Control Assembly
Describes the defrost control assembly and its components.
Lamp Replacement
Details the procedure for removing and replacing freezer and refrigerator lamps.
Control Box-R Removal
Outlines the steps for removing the control box from the inner case.
4. ADJUSTMENT
Compressor Role and Composition
Explains the compressor's role, composition, and usage notes.
PTC-Starter Functionality
Details the PTC starter's composition, role, and application circuit.
OLP (Over Load Protector) Definition
Defines the Over Load Protector (OLP) and its function.
5. CIRCUIT DIAGRAM
Refrigerator Circuit Diagram
Presents the overall electrical circuit diagram for the refrigerator.
6. TROUBLESHOOTING
Compressor and Electric Components Troubleshooting
Provides a flowchart for troubleshooting compressor and electric component issues.
PTC and OLP Troubleshooting
Offers troubleshooting steps for PTC and OLP components.
Other Electric Components Troubleshooting
Details troubleshooting for other electric components like fan motors and sensors.
Service Diagnosis Chart
Presents a chart linking refrigerator complaints to points to check and remedies.
Refrigerating Cycle Troubleshooting Chart
A chart detailing causes, states, and remarks for refrigerating cycle issues.
Leakage Detection in Refrigerating Cycle
Explains how to detect refrigerant leaks in the system.
General Control of Refrigerating Cycle
Details specifications for controlling the refrigeration cycle and related parts.
7. DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM
MICOM System Functionality
Describes the basic functions and settings of the MICOM control system.
Super Cool Feature Operation
Details the Super Cool feature, its operation, and conditions.
Front and Rear LED Operation
Explains the operation of front and rear LEDs and sensor detection.
Variable Speed Fan Control
Describes how the variable speed fan in the freezer compartment operates.
Open Door Alarm Function
Details the open door alarm function, buzzer sounds, and cancellation.
Buzzer Sound Operation
Explains the buzzer sound produced when buttons are pressed.
Double Cooling Fan Control
Describes the operation of the double cooling fan in the refrigerator compartment.
Defrosting Cycle Operation
Explains the defrosting cycle, timing, and conditions for operation.
Sequential Operation of Electric Components
Details the sequential start-up of electric components upon power-on or test completion.
Error Diagnostic Mode
Explains the error diagnostic mode, codes, and causes of errors.
Test Mode Procedures
Describes the test mode for checking PCB functions and identifying defective parts.
7-2 PCB FUNCTION
Power Circuit
Details the power circuit, its components, and voltage distribution.
Oscillation Circuit
Explains the oscillation circuit for generating base clock signals.
Reset Circuit
Describes the reset circuit for initializing the MICOM upon power supply.
Load, Buzzer, and Door Detection Circuits
Details circuits for load drive, buzzer, and open door detection.
Temperature Sensor Circuitry
Details the refrigerator, defrosting, and room temperature sensor circuits and their states.
Switch Input Circuit
Describes the input circuit for detecting test switch signals.
Temperature Compensation Circuits
Explains refrigerator temperature compensation based on resistance values.
Refrigerator Compartment Temperature Compensation Table
Details temperature compensation values for the refrigerator compartment.
Less Cooling and Overcooling Compensation Circuits
Describes circuits for less cooling and overcooling compensation.
Key Button Input & Display Light Circuit
Details the circuit for key button input and display light control.
Communication Circuit Between PCBs
Describes the communication circuit between main PCB and display PCB.
7-3. RESISTANCE SPECIFICATION OF SENSOR
Sensor Resistance Specifications
Lists resistance values for freezer and refrigerator sensors at various temperatures.
7-4. TRUBLE SHOOTING
Power Source Issues
Troubleshooting steps for issues related to the power source.
Cooling Performance Problems
Troubleshooting for cooling issues, including no cooling and poor freezer temperature.
Refrigerator Temperature Issues
Troubleshooting for poor refrigerator temperature and fan motor issues.
Defrosting System Problems
Troubleshooting steps for defrosting failures, drain pipe blockage, and ice buildup.
7-5 MAIN PWB ASS'Y AND PARTS LIST
Main PWB Assembly Diagram
Provides the assembly diagram and component layout of the main PWB.
Replacement Parts List (LED and LCD Models)
Lists replacement parts for both LED and LCD models of the refrigerator.
7-5-3 PWB ASS'Y, DISPLAY AND PARTS LIST
Display PWB Assembly (LED Model)
Details the PWB assembly and parts list for the LED model display.
Display PWB Assembly (LCD Model)
Details the PWB assembly and parts list for the LCD model display.
7-6 PWB DIAGRAM
Main PWB Assembly Diagram (LED Model)
Shows the PWB assembly diagram for the main board (LED model).
Main PWB Assembly Diagram (LCD Model)
Shows the PWB assembly diagram for the main board (LCD model).
Display PWB Assembly Diagram (LCD Display)
Details the PWB assembly for the LCD display.
8. EXPLODED VIEW & REPLACEMENT PARTS LIST
Exploded View of Refrigerator Components
Provides an exploded view of the refrigerator components.
Detailed Exploded View of Parts
Shows an exploded view of the refrigerator's internal and external parts.
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