LG LMXS30776S Service Manual Download Page 35 | Manualshive

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7-3 Sub PCB

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Summary of Contents for LMXS30776S

Page 1: ... 1 76 10 14 5 48 0 6 70 6 4 6 5 6 24 76 105 0 6 5 07 02 0 6 6 2 25 67 1 66 67 4 4 4 614 5 48 07 ...

Page 2: ...HILL DRAWER 18 21 HOT TO REMOVE AND REINSTALL THE PULLOUT DRAWER 22 23 WATER VALVE DISASSEMBLY METHOD 24 FAN MOTOR DISASSEMBLY METHOD 24 CAUTION SEALED SYSTEM REPAIR 25 WAY VALVE SERVICE 25 HOW TO REMOVE AND REINSTALL THE HOMEBAR 26 HOW TO REMOVE AND REINSTALL THEHOMEBAR DOOR 27 HOW TO REMOVE AND REINSTALL THE DOOR FOAM ASSEMBLY REFRIGERATOR 28 HOW TO REMOVE FRAME DOOR SWITCH OF DOOR FOAM 29 4 ADJ...

Page 3: ...BLE TRAY COMPRESSOR EVAPORATOR CONDENSER REFRIGERANT LUBRICATING OIL DEFROSTING DEVICE ITEMS Clear Drawer Type Linear Fin Tube Type Spiral Condenser AI R 134a 135g ISO10 280 ml SHEATH HEATER LED Module LED Module SPECIFICATIONS LAMP REFRIGERATOR FREEZER DIMENSIONS Depth w Handles Depth w o Handles Depth w o Door Depth Total with Door Open Height to Top of Case Height to Top of Door Hinge Width Wid...

Page 4: ... IDENTIFICATION Door In Door Case Adjustable Refrigerator Shelf Cheese Butter Bin Condiment Bin Pullout Drawer EasyReach Indoor Ice Bin Crisper Custom Chill Drawer Durabase and Durabase Divider LED interior lamps ...

Page 5: ... 5 3 DISASSEMBLY 3 1 REMOVING AND REPLACING REFRIGERATOR DOORS ...

Page 6: ... 6 ...

Page 7: ... 7 ...

Page 8: ... 8 3 3 Sub PCB ...

Page 9: ... 9 3 4 Door Alignment 3 5 FAN AND FAN MOTOR ...

Page 10: ... 10 ...

Page 11: ... 11 3 6 Refrigerator Light Top ...

Page 12: ... 12 3 7 MULTI DUCT ...

Page 13: ... 13 3 8 DISPENSER 3 9 DISPLAY PCB 3 10 CustomChill DISPLAY ...

Page 14: ... 14 3 11 ICE BUttoN ASSEMBLY 3 12 WATER BUTTON ASSEMBLY 3 13 ICE CORNER DOOR REPLACEMENT ...

Page 15: ... 15 3 14 ICEMAKER REPLACEMENT 3 15 SUB PCB FOR WORKING DISPENSER ...

Page 16: ... 16 3 16 CAP DUCT MOTOR REPLACEMENT 3 17 Module filter Replacement ...

Page 17: ... 17 3 18 Module filter Part Replacement 3 19 HOW TO REMOVE A ICEBIN 3 20 HOW TO INSERT A ICE BIN ...

Page 18: ... 18 3 21 CustomChill Drawer ...

Page 19: ... 19 ...

Page 20: ... 20 ...

Page 21: ... 21 4 ...

Page 22: ... 22 22 ...

Page 23: ... 23 22 ...

Page 24: ... 24 3 23 WATER VALVE DISASSEMBLY METHOD 3 24 Fan motor assembly disassembly method ...

Page 25: ...3 25 CAUTION Sealed System Repair 3 26 Way Valve Service ...

Page 26: ... 26 7 7 7 3 27 HOW TO REMOVE AND REINSTALL THE HOMEBAR ...

Page 27: ... 27 3 28 HOW TO REMOVE AND REINSTALL THE HOMEBAR DOOR ...

Page 28: ... 28 3 29 HOW TO REMOVE AND REINSTALL THE DOOR FOAM ASSEMBLY REFRIGERATOR ...

Page 29: ... 29 3 30 HOW TO REMOVE FRAME DOOR SWITCH OF DOOR FOAM ...

Page 30: ...1 2 Notes for Usage 4 1 3 Remove the cover PTC 1 Remove the Cover Back M C 2 Remove two screws on comp base 3 Use a L shaped flap tooll to pry off the cover 4 Assembly in reverse order of disassembly 4 2 3 Compressor protection logic ...

Page 31: ... 31 ...

Page 32: ... Jam Poor Relay for Heater 10 Ice maker kit defect It Other Electric system error such as moter gear Hall IC operation circuit within I M kit When the ice does not drop even when the I M Test S W is pressed same as model applied Twisting Ice Maker before 11 Flow Meter Sensor Defect gF Error of flow meter or water input or low water pressure Error of flow meter or water input or low water pressure ...

Page 33: ... 33 ...

Page 34: ... 34 7 PCB PICTURE EBR78643401 7 1 Main PCb 7 2 Display PCB ...

Page 35: ... 35 7 3 Sub PCB ...

Page 36: ... 36 8 Troubleshooting With Error Display 8 1 Freezer Sensor Error E FS ...

Page 37: ... 37 ...

Page 38: ... 38 8 2 Refrigerator Sensor Error E rS ...

Page 39: ... 39 ...

Page 40: ... 40 8 3 Icing Sensor Error E IS ...

Page 41: ... 41 ...

Page 42: ... 42 8 4 Defrist Sensor Error F dS ...

Page 43: ... 43 ...

Page 44: ... 44 8 5 Defrost Sensor Error r dS ...

Page 45: ... 45 ...

Page 46: ... 46 8 6 Defrost Heater Error F dH ...

Page 47: ... 47 ...

Page 48: ... 48 8 7 Defrost Heater Error r dH ...

Page 49: ... 49 ...

Page 50: ... 50 8 8 Refrigerator Fan Error E rF ...

Page 51: ... 51 ...

Page 52: ... 52 8 9 Freezer Fan Error E FF ...

Page 53: ... 53 ...

Page 54: ... 54 8 10 Icing Fan Error E IF ...

Page 55: ... 55 ...

Page 56: ... 56 8 11 Condenser Fan Error E CF ...

Page 57: ... 57 ...

Page 58: ... 58 8 12 Communication Error E CO ...

Page 59: ... 59 ...

Page 60: ... 60 8 13 Cube mode doesn t work ...

Page 61: ... 61 ...

Page 62: ... 62 ...

Page 63: ... 63 8 14 Crush mode doesn t work ...

Page 64: ... 64 ...

Page 65: ... 65 ...

Page 66: ... 66 8 15 Water mode doesn t work ...

Page 67: ... 67 ...

Page 68: ... 68 8 18 Middle room lamp doesn t work ...

Page 69: ... 69 ...

Page 70: ... 70 8 17 Freezer room lamp doesn t work ...

Page 71: ... 71 ...

Page 72: ... 72 8 18 Refrigerator room lamp doesn t work ...

Page 73: ... 73 ...

Page 74: ... 74 8 19 Roop cooling in Fresh food section ...

Page 75: ... 75 ...

Page 76: ... 76 8 20 Poor cooling In Freezer compartment ...

Page 77: ... 77 ...

Page 78: ... 78 ...

Page 79: ... 79 10 Reference 10 1 TEST MODE and Removing TPA ...

Page 80: ... 80 10 2 TEMPERATURE CHART FREEZER AND ICING SENSOR ...

Page 81: ... 81 10 3 TEMPERATURE CHART REFRIGERATOR AND DEFROST SENSOR ...

Page 82: ... 82 10 4 How to check the Fan Error ...

Page 83: ... 83 11 COMPONENT TESTING INFORMATION 11 1 Defrost Seneor of Defrost heater F R ...

Page 84: ... 84 11 2 Sheath Heater Freezer Room ...

Page 85: ... 85 11 3 Sheath Heater Refrigerator Room ...

Page 86: ... 86 Function How to Measure Switch Refrigerator Standard Beep Multimeter beep Switch R Button Plunger 2 1 1 2 3 4 11 4 Door Switch H ...

Page 87: ...Magnet Center Switch Center Switch Center Function How to Measure No magnet Magnet near the Switch Standard Bad position Good position Magnet must be center of Switch magnet Magnet Center 11 5 Door Switch F ...

Page 88: ... 88 11 6 Dispenser DC Motor ...

Page 89: ... 89 11 7 AC Motor ASSEMBLY ...

Page 90: ... 90 Function How to Measure Damper Circuit extension Check the Standard Damper 1 Blue 1 Blue 2 Red 3 White 3 White 1 3 Check the 2 4 Check the 1 3 3 Yellow 11 8 Damper ...

Page 91: ... 91 Function How to Measure Standard 1 2 3 4 11 9 Lamp Socket ...

Page 92: ... 92 Function How to Measure Standard 11 10 Flow Sensor ...

Page 93: ... 93 12 Compressor Troubleshooting ...

Page 94: ... 94 12 1 Check A ...

Page 95: ... 95 ...

Page 96: ...ing Check C Fix Harness N N Cycle Check E Fix Cycle Replace Driver PCB OK NG B GND A C Devices should not be short circuited when you checkC Purpose Detecting motor current and voltage error Check voltage at point A Motor Voltage point B Motor Current and Point C Capacitor Voltage when compressor is off Spec Points A B C 2 5V 0 3V Purpose Prevent abnormally long piston strokes Case 1 If compressor...

Page 97: ... 97 B3 LED blinks three times then repeats Stroke Trip B4 LED blinks five times then repeats Locked Piston B5 LED blinks six times then repeats Current Trip ...

Page 98: ...for a dead short at Point A with a VOM Logic Compresso r is forced off and tries to restart in 20 seconds A B7 LED Blinks eight times then repeats Communication Error F F O Blink Blink k n i l B k n i l B k n i l B k n i l B k n i l B k n i l B Protection logic Check blink 8 times Communication Error check B7 Check Comp Starting when C fan doesn t work Y N Reset Power Purpose To detect Set control...

Page 99: ... 99 12 3 Check C ...

Page 100: ... 100 12 4 Check D Cycle check with protection logic Sealed system D1 Activate Protection logic D2 sealed system diagnosis ...

Page 101: ... 101 ...

Page 102: ...ston Lock Trip on on on on on off on on on on on off repeating 2 LED six time repetiton Current Trip on on on on on on off on on on on on on off repeating 3 LED seven time repetiton IPM Fault Trip on on on on on on on off on on on on on on on off repeating 4 No LED operating condition Cause Service guideline ...

Page 103: ... 103 12 5 SERVICE DIAGNOSIS CHART COMPLAINT POINTS TO BE CHECKED REMEDY Warm position Recommended position Recommended position colder position Warm position ...

Page 104: ... 104 12 6 REFRIGERATORION CYCLE Troubleshooting Chart CAUSE REMARKS STATE OF THE EVAPORATOR TEMPERATURE OF THE COMPRESSOR STATE OF THE UNIT 12 6 1 Cleaning ...

Page 105: ...t Very Fast Very Fast Inefficient Compressor Partial Restriction Complete Restriction Condenser Temperature Cap Tube Sound Yes No Air Low Side Leak Loss of Change Faint Hotter than Normal None to Weak Room Temperature Compressor Not Pumping Trace of Oil Under Change The equalization test is trying to restart a compresor using a start kit after it has been operationg Leak Very Slow Very Slow 12 6 2...

Page 106: ... 106 13 13 ...

Page 107: ...tment How long has customer waited for icemaker to make ices saddle valve fill tube heater all the water valve connection Icing fan is working multi duct is blocked Measure the temp gas leakage If the issue haven t resolved yet though you have checked all the items above go to next step 13 2 1Icemaking mode 13 2 2 Harvest mode 13 2 3 Fill Park Position 13 3 1 Icemaker not making ice or not making ...

Page 108: ... 108 13 3 2 Icemaker not making ice or not making enough ice Icemaker Unit Ice detecting sensor Diagnosis ...

Page 109: ...st it The water comes out of fill cup and the water get into the ice bin Resolution The water pressure from shutoff valve is too high Recommend to use regulator to the customer and close the shutoff valve slightly Clogged Ices In the Chute suspected items Cap duct doesn t seal the air properly Resolution Possibly warm air could get into the compartment and make ices get stuck Replace the cap duct ...

Page 110: ... 110 14 14 14 1 1 Function 14 1 2 How to Toggle the Display between D C 14 1 3 Lock function dispenser and display button lock ...

Page 111: ... 111 14 1 4 Filter condition display function 14 1 5 Air Filter selection 14 1 6 Ice Plus selection 14 1 7 Dispenser Use selection ...

Page 112: ...plete its cycle after defrosting has ended If the defrost cycle begins when Ice Plus has run for more than 30 minutes Ice PLUS will run for 40 minutes after the defrost is completed 3 If ice PLUS is pressed during defrost Ice Plus Icon is on but this function will start seven minutes after defrost is completed and it shall operate for three hours 4 If Ice Plus is selected within seven minutes afte...

Page 113: ...3 6 4 8 plus For initial power on or for restoring power defrosting starts when the compressor running time reaches 4 hours 6 4 8 8 1 15 14 1 14 Defrosting removing frost 14 1 15 Defect Diagnosis Function ...

Page 114: ...00A 314A 317A 318A 301A 308B 403B 312C 312D 404A 410G 500P 105A 619D 105D S10 271D 315C 315B 315C 315B 103B 103A 610F 610C 406F 406B S14 B02 262B 249C 262H B02 S14 249V 105B S11 409D 158A S11 409F 405J 120A 409H 282G 404C 405E 327B 628A 631C 145A 503D 282H 158C 146C 145B 605A 605A 332D 120G 120B 249M 249G 408A 408B S11 402A 15 EXPLODEDVIEW REPLACEMENTPARTSLIST 249D ...

Page 115: ...150F 264A 264B 136C 264A 150F 264B 150A 150E 205D ...

Page 116: ...136E 134A 205D 150B 150D 132P 132Q 133C 145J 145H 145M 145F 136A 237C 253D 150C 145G 145C 145I 145K 136B 133C ...

Page 117: ...umber to order part not the position number 142D 142B 142C 142A 141F 141B 141H 141A 141F 141B 141H 141A 141F 141B 141H 141A 146E 151B 151C 151A 161B 161A 161C 146E 154D 255B 177C 255A 255A 177E 132P 133E 133E 132P 177D 132S 144A 141D 162A 162B ...

Page 118: ...S05 249F 249K 407G 201B B06 206L S05 249J B06 212D 206K 405M 249E S08 233C 243G 243H 243F 262F 279M 241M 244F B06 233H 251A 212G 241N S14 232B 241F 233A 262E 205F 402B 180A 231A 241A 281K 146F 312E 281B 312G 207C 312F 250W 281K 207D 232A 241B 241B 624A 233E 233G S03 406K S05 407G 250A 250H 203B 252C B06 619C 312B 615A 624G 624C 619B 205H 180A 409I ...

Page 119: ...279A 278D 279L 501A 279C 281A 279B 402C 402E 276B 275A 276I 278C 276G 276F 405A 276A 279K 501D ...

Page 120: ...617A 603C 623B 616J 627B S04 S04 627A 619A 603B S04 623B 616J 603C 616G 616G 616F ...

Page 121: ...630J 630J 612A 606A 600A 607A 611A 630C 630F 630B 630D 630A 630H 630G 630Q 630E ...

Page 122: ...P No MFL62188124 DEC 2014 Printed in Korea ...

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