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REFRIGERATOR
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY
PRECAUTIONS" IN THIS MANUAL.
MODEL:GR-S392GCA,GR-S352GCA
GR-S392GTA
Ref. No.
.
GR-S392GCA
.
GR-S392GTCA
GR-S352GCA
http://biz.lgservice.com
COLOR:SUPER WHITE
TITANIUM

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Summary of Contents for LG GR-S392GCA

  • Page 1 REFRIGERATOR SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS" IN THIS MANUAL. Ref. No. GR-S392GCA GR-S392GTCA GR-S352GCA MODEL:GR-S392GCA,GR-S352GCA COLOR:SUPER WHITE GR-S392GTA TITANIUM...
  • Page 2: Table Of Contents

    CONTENTS SAFETY PRECAUTIONS ............................... 2 SERVICING PRECAUTIONS..............................3 SPECIFICATIONS................................... 4 PARTS IDENTIFICATION ............................... 5 DISASSEMBLY..................................6-7 DOOR....................................6 DOOR SWITCH..................................6 THERMISTOR ..................................6 FAN AND FAN MOTOR................................ 6 DEF' CONTROL ASM ................................7 REFRIGERATOR ROOM LAMP ............................7 CONTROL BOX-R................................7 ADJUSTMENT..................................
  • Page 3: Servicing Precautions

    SERVICING PRECAUTIONS Air Recharging in Compressor vacuum operation is over, add the quantity in grams of R- 134a to the refrigerant system. Remember that every Test the refrigeration by connecting it electrically before system has an exact quantity of R-134a with a tolerance of refilling operation.
  • Page 4: Specifications

    1. SPECIFICATIONS SPECIFICATIONS ITEMS GR-S392Q GR-S392G GR-S352Q GR-S352G FREEZER NET CAPACITY REFRIGERATOR ( l ) TOTAL DIMENSIONS (mm) 610(W) 692(D) 1700(H) 610(W) 688(D) 1700(H) 610(W) 692(D) 1580(H) 610(W) 688(D) 1580(H) NET WEIGHT (kg) COOLING SYSTEM Fan Cooling FREEZER Knob Dial TEMPERATURE CONTROL REFRIGERATOR...
  • Page 5: Parts Identification

    2. PARTS IDENTIFICATION FREEZER COMPARTMENT Freezer Temperature Freezer Door Rack Control Dial Ice Trays Freezer Shelf (Plastic or Steel) Egg Storage Rack Twisting Ice Serve(Option) Wine Rack General Type Ice Making (Option if steel shelf) REFRIGERATOR You can use COMPARTMENT this as Vodka rack Deodorizer...
  • Page 6: Disassembly

    3. DISASSEMBLY 3-1 DOOR 3-2 DOOR SWITCH Freezer Door 1. To remove the door switch, pull out it with a '—' type 1. Remove the hinge cover by pulling it upwards. driver as shown in (figure 9). 2. Loosen hexagonal bolts fixing the upper hinge to the 2.
  • Page 7: Def' Control Asm

    6. Disconnect the housing of lead wire. 3-6 REFRIGERATOR ROOM LAMP 7. Separate the Fan Assy. 1. Remove the cover lamp-R by pulling with a '–––' type 8. Loose 2 screw fixed to the Bracket. driver. 2. Remove the lamp-R by turning. 9.
  • Page 8: Adjustment

    4. ADJUSTMENT 4-1 COMPRESSOR 4-2-3 PTC-Applied Circuit Diagram According to Starting Method of Motor 4-1-1 Role The compressor inhales low temperature and low pressure gas evaporated from Evaporator of the Refrigerator, and condenses this gas to high temperature and high pressure OVERLOAD PROTECTOR gas, and then plays delivering role to Condenser.
  • Page 9: Olp (Over Load Protector)

    4-3 OLP (OVER LOAD PROTECTOR) CONTACTING POINT 4-3-1 Definition of OLP COVER (1) OLP (OVER LOAD PROTECTOR) is attached to Hermetic Compressor and protects Motor by cutting off BIMETAL current in Compressor Motor by Bimetal in the OLP in case of over-rising temperature. CONTACTING (2) When over-voltage flows to Compressor motor, Bimetal POINT...
  • Page 10: Troubleshooting

    6. TROUBLESHOOTING 6-1 COMPRESSOR AND ELECTRIC COMPONENTS (Rating Voltage Remove the PTC-Starter Power Source. ±10%)? from the Compressor and measure the voltage between Terminal C of Compressor and Terminals 5 or 6 of PTC. No Voltage. OLP disconnected? Replace OLP. Check connection condition.
  • Page 11: Ptc And Olp

    6-2 PTC AND OLP Check another Normal operation of Separate the PTC from Observation value is electric components. Compressor is 220V/50Hz : 22 ±30% Compressor and impossible or poor. 115V/60Hz : 6.8 ±30% measure the resistance 240V/50Hz : 33 ±30% between No.
  • Page 12: Another Electric Components

    6-3 ANOTHER ELECTRIC COMPONENTS Cooling is impossible Compressor Check if current flows to Cause. doesn't run. the following components. a. Thermistor Poor contacting. b. Starting devices Shorted or broken. Poor contacting c. OLP or shorted. d. Compressor coil Coil shorted. Replace Poor contacting e.
  • Page 13: Service Diagnosis Chart

    6-4 SERVICE DIAGNOSIS CHART COMPLAINT POINTS TO BE CHECKED REMEDY Cooling is • Is the power cord unplugged from the outlet? • Plug to the outlet. impossible. • Check if the power S/W is set to OFF. • Set the switch to ON. •...
  • Page 14: Refrigerating Cycle

    6-5 REFRIGERATING CYCLE Troubleshooting Chart TEMPERATURE STATE OF STATE OF THE CAUSE REMARKS OF THE THE SET EVAPORATOR COMPRESSOR PARTIAL Freezer and Low flowing sound of A little high • A little Refrigerant LEAKAGE Refrigerator Refrigerant is heard and more than •...
  • Page 15: Refrigerating Cycle

    General Control of Refrigerating Cycle ITEMS CONTENTS AND SPECIFICATIONS REMARKS WELDING (1) H 30 • Chemical Ingredients • Recommend H34 containing 34% Ag in the (1) • Ag: 30%, Cu: 27%, Zn: 23%, Cd: 20% • Service Center. • Brazing Temperature: 710~840°C (2) Bcup-2 •...
  • Page 16: Description Of Function & Circuit Of Micom

    7. DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM The following description is basically for GR-S352/GR-392. For the other models, refer to the diagram of the entire PCB circuit. 7-1 FUNCTION 7-1-1 FUNCTION 1. When the appliance is plugged in, it is set to ‘Medium’. Each time the button is pushed, it is set to ‘Medium’...
  • Page 17 7-1-2 DEFROSTING 1. The defrosting is performed each time when the total running time of the compressor reaches 7 hours. 2. After the power is turned on (or restored after a power failure), the defrosting starts when the total running time of the compressor reaches 4 hours.
  • Page 18 7-1-5 ERROR DIAGNOSTIC MODE 1. The error diagnostic mode allows the SVC when a fault that may affect the performance of the product occurs while operating the product. 2. Even if the function control button is pushed when an error occurs, the function will not be performed. 3.
  • Page 19 7-2 PCB FUNCTION 7-2-1 POWER CIRCUIT The secondary part of the TRANS is composed of the power supply for the display and relay drive (12Vdc) and that for the MICOM and IC (5Vdc). The voltage for each part is as follows. PART VA 1 CE 2...
  • Page 20 7-2-2 OSCILLATION CIRCUIT This circuit is to generate the base clock for calculating time and the synchro clock for transmitting data from and to the inside logic elements of the IC1(MICOM). Be sure to use the authentic parts since the calculating time by the IC1 may be changed or it will not work if the OSC1 SPEC is changed.
  • Page 21 7-2-4 LOAD DRIVE CIRCUIT 1. Load Drive Condition Check Comp, Load Type Defrosting Heater Refrigerator Fan Lamp Freezer Fan Motor Measurement Location(IC5) No.13 No.10 No.12 No.11 1V or below Condition - 21 -...
  • Page 22 7-2-5 TEMPERATURE SENSOR CIRCUIT The upper CIRCUIT reads REFRIGERATOR temperature and DEF-SENSOR temperature for defrosting into MICOM. OPENING or SHORT state of each TEMPERATURE SENSOR are as follows. SENSOR CHECK POINT NORMAL(-30 °C ~ 50 °C) SHORT-CIRCUITED OPEN Refrigerator Sensor POINT Voltage 0.5 V ~ 4.5 V...
  • Page 23 7-2-7 TEMPERATURE COMPENSATION & OVERCOOLING/UNDERCOOLING COMPENSATION CIRCUIT 1. Refrigerator Temperature Compensation Refrigerator Resistance Temperature Remark (RCR1) Compensation 180 K +2.5 °C Compensation by raising the 56 K +2.0 °C temperature 33 K +1.5°C 18 K +1.0 °C 12 K +0.5 °C 10 K 0 °C Standard Temperature...
  • Page 24 7-2-8 KEY BUTTON INPUT & DISPLAY LIGHT ON CIRCUIT The circuit shown above is to determine whether a function control key on the operation display is pushed and to turn on the corresponding function indication LED. The drive type is the scan type. - 24 -...
  • Page 25 7-3 RESISTANCE SPECIFICATION OF SENSOR TEMPERATURE SENSOR RESISTANCE OF REFRIGERATOR (DEFROST) SENSOR - 20 ˚C 77 K - 15 ˚C 60 K - 10 ˚C 47.3 K - 5 ˚C 38.4 K 0 ˚C 30 K + 5 ˚C 24.1 K + 10 ˚C 19.5 K + 15 ˚C...
  • Page 26 7-4 TROUBLE SHOOTING • Replace PCB when no trouble after checking the contents of trouble. CLASSIFICATION STATE OF TROUBLE POINT BE CHECKED CHECKING METHOD CONTENT REMEDY POWER SOURCE 1. All the DISPLAY 1. FREEZER/ FREEZER/REFRIGERATOR POWER SOURCE is poor Certify Fuse. is poor LED OFF REFRIGERATOR...
  • Page 27 CLASSIFICATION STATE OF TROUBLE POINT BE CHECKED CHECKING METHOD CONTENT REMEDY COOLING is poor. REFRIGERATOR 1. FREEZER TEMPERATURE See "FREEZER Certify the attaching state TEMPERATURE is is normal? TEMPERATURE is poor". of DOOR. poor. 2. Cool air of FAN MOTOR is Certify the amount of cool air FAN MOTOR is poor.
  • Page 28 7-5 MAIN PWB ASSEMBLY AND PARTS LIST 7-5-1 MAIN PWB ASSEMBLY - 28 -...
  • Page 29 7-5-2 REPLACEMENT PARTS LIST - 29 -...
  • Page 30 7-5-3 PWB ASSEMBLY, DISPLAY AND PARTS LIST - 30 -...
  • Page 31 7-6 PWB DIAGRAM - 31 -...
  • Page 32 REF. TEMP. CONTROL - 32 -...
  • Page 33: Exploded View

    #EV# 8. EXPLODED VIEW The parts of refrigerator and the shape of each part are subject to change in different localities. Capacitors and fuse are optional parts. : optional parts. 281A 103B 281B 301A 103A 401A 281D 501F 411A 501A 418A 410G 125L...
  • Page 34 #EV# 405C 405A 330B 203A 200A 205A 404A 329A 201A 201A 212G 332A 201A 212G 205A 212A 110B 212C 125A 149D 212A 131A 235A 125H 212C 125J 149A 136C 241A 243A 233A 210A 231A 230A 136D 234B 149B 233B 231A 140A 233B 237A...
  • Page 35 #EV# 405C 405A 200A 330B 203A 205A 404A 329A 201A 212G 332A 205A 110B 1SZZJA 109A 125A 149D 131A 235A 125H 212A 125J 149A 243A 136C 210A 241A 230A 233A 136D 149B 231A 140A 233B 237A 149C 149C 136A 136B 241C 149C 149C...
  • Page 36 P/No. 3828JD8625Y SEP., 2004 Printed in Korea...

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