Door opening sensing circuit | LG Electronics GR-P227/L227 specification

EXPLATION FOR MICOM CIRCUIT

1-6. Door opening sensing circuit

(1)GR-P227/L227/P257/L257

	Measuring part	IC1 (MICOM) No. (44, 45) / (45, 46) / (47, 48) Pin
	Door of Freezer and Refrigerator	IC1 (MICOM) No. (44, 45) / (45, 46) / (47, 48) Pin
	Door of Freezer and Refrigerator

	Closing	5 V ( A	-	B ,	C	-	D	. Switch at both ends are at Off status)

	Opening	0 V ( A	-	B ,	C	-	D	. Switch at both ends are at On status)

✽Since door switches (A) and (B) are interconnected, if either fails, the other will not respond properly.

✽If either switch fails, the light will not come on.

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LG Electronics GR-P227/L227, GR-P257/L257 service manual Door opening sensing circuit

Contents

Refrigerator Contents Page Specifications Front View Ref No. GR-L227 Ref No. GR-P257 Ref No. GR-L257 Parts Identification Freezer Refrigerator compartment compartment Ref No. GR-P227/GR-P257EXTERNAL Filter Parts Identification Parts Identification HOW to Install Refrigerator How to Adjust Door Height of Refrigerator Class Shape and Spec Nomenclature How to Install Water PipeBefore Installation Connection of Pipe Connector a and B Single Lever Type Faucet generalTwo Hands Type Faucet General Type Outternal Filter Filter Fixation When customer uses bottled waterFilter Cleaning After installing water filter Replacement of water filter How to Control the Amount of Water Supplied to Icemaker Confirm the amount of water supplied to the icemaker Door Alarm Buzzer Mute Mode Display Power saving ModeMicom Function Monitor Panel Exhibition Mode Description of Function Outside temperature display function LCD Back Light ControlLock function display button lock Filter condition display function When ice maker does not operate smoothly Dispenser use selectionAutomatic ice maker Express Freezer Control of variable type of freezing room fan Super freezingMiracle Zone function Door opening alarm Control of M/C room fan motorDoors of freezing Or home bar Sequential operation of built-in product Failure Diagnosis Function Mode Operation Contents Remarks Test Function Test Mode 1 Status LCD Test Mode 2 Status LCD Function of dispenser and water dispenser built-in Power circuit Explation for Micom CircuitExplanation for PWB circuit GR-P227/L227 GR-P227/L227/P257/L257 Reset circuitOscillation circuit Load/dispenser operation, door opening circuit Load Driving Circuit Lever Switch sensing circuit Measuring part Dispenser operation circuit Door opening sensing circuit Temperature sensing circuit Short Open Separation Connection Status Application Standard Switch entry circuitOption designation circuit model separation function Stepping motor operation circuit Fan motor driving circuit freezer, mechanical area +5 C +9F 33 k Ω 56 k Ω JCR1 Main PCB Sensor resistance characteristics table Miracle Zone Stepping Motor / Display Operation Principle Harvest Mode Icemaking ModeFill/Park Position Water supply amount Table Stage Items Indicator Remarks Defect diagnosis function Circuit Trouble Shooting Trouble Diagnosis Not performed Evaporator by heating as Refrigeration Refrigeration Residual Refrigeration No cooling air circulation Is weak Fan does not work Recess Sounds Compressor compartment operating sounds Bad soldering Bad rivet contact Short Structure Door foam Appearance Sag Faults PowerProblems Causes Checks Measures Remarks Problems Causes Checks Measures Temperature Cooling Disconnected from the motor Refer to fan motor disassembly Measures Remarks Problems CausesDefrosting failure Remove the parts and replace it Icing Discharging port of cooling air Sound Click Contraction of evaporator Sources Sound Burping It happens when refrigerant expands Odor Problems Symptom Causes Checks Measures Remarks Micom Driving circuits Motor damper Replace door switch Trouble Diagnosis Cooling Cycle Heavy Repair Items Unit Standards Purposes Remarks Process Contents Tools Summary Of Heavy Repair Precautions During Heavy Repair Items Precautions When replacing a drier When replacing a compressorPractical Work For Heavy Repair Inserting a capillary tube Pipe Connection Vacuum SequenceCharging sequence Calculation of amount of refrigerant charged Standard Regulations For Heavy Repair 12-0mm Europe & CIS / America Brazing Reference DrawingsAsia / Middle-East Africa Problems Checks and Measures Explain the principles of temperature changeSound depends on the installation location Explain general principles of sounds Explain the procedure and principles of ice maker operation Explain the flow of refrigerantExplain the characteriistics of moving parts Explain the principles of water supplied to dispenser Measures for Symptoms on Temperature Check the temperature control button and set at strong Odor and FrostExplain the basic principles of food odor Explain the basic principles of frost formation Others HOW to Disassemble and Assemble Remove a freezer door Handle InsertTubeLineColletClip Assembly COVER, Dispenser Exploded View Ref No. GR-P227/GR-P257 Optional part Ref No. GR-L227/GR-L257 Freezer Compartment Refrigerator Compartment Optional part Machine Compartment ICE & Water Part Dispenser Part No JD8999A