Manuals / LG Electronics / Kitchen Appliance / Refrigerator

LG Electronics LRTN22310, LRTN19310 service manual Temperature Sensor Circuit

Models: LRTN19310 LRTN22310

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7-2-3 Temperature Sensor Circuit

Voltage supplied to each sensor wil range between 0.5 volts -22°F(-30°C) and 4.5 volts 122°F(50°C) depending upon the temperature in the compartments. A measurement of 0 volts indicates a short in the sensor circuit. A measurement of 5 volts indicates an open in the sensor circuit.

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LG Electronics LRTN22310, LRTN19310 service manual Temperature Sensor Circuit

Contents

REFRIGERATOR BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUALmodels LRTN19310** LRTN22310CONTENTS SAFETY PRECAUTIONS1. SPECIFICATIONS Ref. No. 19Cuft / 22CuftCOMPARTMENT 2. PARTS IDENTIFICATIONFREEZER REFRIGERATOR3-2 DOOR SWITCH 3. DISASSEMBLY3-1 DOOR 3-5 LAMP 3-4 DEFROST CONTROL ASSEMBLY3-3 FAN AND FAN MOTOR 3-6 CONTROL BOX-REFRIGERATOR4-1 COMPRESSOR 4. ADJUSTMENT4-2 PTC-STARTER 4-3-1 Definition of OLP 4-3 OLP OVERLOAD PROTECTOR4-4 TO REMOVE THE COVER PTC 4-3-2 Role of the OLP5. CIRCUIT DIAGRAM GOOD MODEL6. TROUBLESHOOTING 6-1 COMPRESSOR AND ELECTRIC COMPONENTSShows continuity 6-2 PTC AND OLPObservation value is 115V/60Hz 6.8Ω±30% electric componentNot cooling at all 6-3 OTHER ELECTRIC COMPONENTSPoor cooling performance Check if frost forms in the freezer Check the refrigeration system 6-4 SERVICE DIAGNOSIS CHARTNot defrosting The system is faulty Check the Thermistor6-5 REFRIGERATING CYCLE General Control of Refrigerating Cycle Replace drier whenever repairingafter welding to protect pipe from cracking COMP POWERheater ON POWERDefect code panel ERROR CODE on Refrigerator Temperature panel7-1-4 Defect Diagnosis Function 7-1-5 TEST Mode CONTENTSReset MODE7-2 PCB FUNCTION 7-2-1 Power Circuit7-2-2 Load / Buzzer Drive & Open Door Detection Circuit 1. Load Drive Condition CheckFreezer or Refrigerator Measurement between pins 5 and 6 at Con2. Open Door Circuit Door Monitor Circuit Both Closed7-2-3 Temperature Sensor Circuit RESISTANCE OF FREEZER 7-3 RESISTANCE SPECIFICATION OF SENSORTEMPERATURE RESISTANCE OF REFRIGERATORTROUBLESHOOTING SYMPTOMSOLUTION COMPLAINT7-5 MAIN PWB ASSEMBLY AND PARTS LIST 7-5-1 Main PWB Assembly8. EXPLODED VIEW & REPLACEMENT PARTS LIST CASE PARTS110D S22 284C FREEZER PARTS330B S21 284A 332A 405C 405A 404A 329A S20141B 141A 141A 141C 141B 170A 141C 141B 128A141A 128B 141C 141B REFRIGERATOR PARTS141A 141C 141B 167B 141A 141C 154A 151A 155B 151A 151C DOOR PARTS 281DP/No. 3828JL8015A