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LG WF-T857, Service Manual

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LG WF-T857 Service Manual Download Page 33

33

4-5. DISASSEMBLY INSTRUCTION

Be sure to unplug the power to repair and
replace electric parts.

1) Disassembly of Front Panel 

& PCB Assembly

Remove two screw caps using a sharp tool
and two front panel fixing screws.

Push the front panel to the left side then
pull it out.

Disconnect the leads from the controller.

Remove 4 screw from the front panel.

Remove the PCB Assembly.

Fuse is located in the PCB assembly For fuse
replacement use the following rated fuse
* Rating of fuse

- 250V 6A fusing type for 220-240V product
- 125V 12A fusing type for 100-127V product 

2 Hr

1 Hr

30 min.
(Tubdry)

AIR

AIR
DR

DRY

QUICK 

QUICK Wash

ash

leads

PCB Assembly

Fuse

Be sure to make earth connection for trouble
diagnosis and parts replacement. If impossible,
touch earth wire on the body to remove electric
deviation between the body and product before
work.

CAUTION FOR ELECTROSTATICS

Summary of Contents for WF-T857

Page 1: ...WASHING MACHINE SERVICE MANUAL MODELS WF T857 CAUTION Before servicing the washer Read the safety precautions in the manual ...

Page 2: ...lity in connection with its use CONTENTS 1 Specifications 3 2 Installation Instructions 4 3 Operating Instructions 3 1 Identification of Parts 10 3 2 Before Starting to Wash 11 3 3 Function of Each Button 16 3 4 Washing Programs 18 3 5 Other Functions 20 3 6 Care and Maintenance 28 4 Service Information 4 1 Schematic Diagram 29 4 2 Wiring Diagram 30 4 3 Program Time Chart 31 4 4 Adjustmen 32 4 5 D...

Page 3: ...r to rating label on the back of Washer Refer to rating label on the back of Washer Refer to rating label on the back of Washer Plastic Stainless 0 5kgf cm2 6kgf cm2 50Hz 680 50 rpm 60Hz 730 50 rpm Refer to rating label on the back of Washer Refer to rating label on the back of Washer FUZZY QUICK Wash JEAN WOOL DELICATE SOAK FAVORITE SILENT NORMAL WASH 7 Stages Available for 3 48 Hr B P Sensor Mag...

Page 4: ...ted floor 2 Install the washing machine on a level and firm surface any tilt should be less than 1 Installation area Install the washer on flat and firm surface Checking level Open the lid and check if the washer is correctly leveled by looking down from the top How to use the adjusting plates Use the adjusting plates to level the washer when the adjustable legs cannot cover the gap Turn the adjus...

Page 5: ...ontal setting Lift up the front of the washer and adjust level by turning the adjustable legs clockwise or using the adjusting plate Distance between drain hose and the wall Distance between drain hose and the wall should be more than 10 cm and the distance between the other part and the wall should be more than 2 cm More than 2cm More than 10cm More than 2cm ...

Page 6: ... connector to the tap Push the upper connector up till the rubber packing is in tight contact with the tap Then tighten the 4 screws 2 Attach the water supply hose to the connector Push the water supply hose vertically upwards so that the rubber seal within the hose can adhere completely to the tap 3 Fixing the connector of connector and water supply hose Attach the water supply hose to the connec...

Page 7: ... the water leakage After connecting the hose open the tap to check for any water leakage In case of water leakage close the tap and start again from step 1 If you skip step1 it may cause water leakage 6 Conector Medio Etiqueta Fija Manija de Presión Barra de Presión Manguera de Suministro de Agua Empaque de Caucho Tornillo Etiqueta Fija Empaque de Caucho Placa Guía Conector Conector Etiqueta Fijad...

Page 8: ...ap and then tighten it by screwing it to the right 2 Check water leakage After connecting the hose open the faucet to check for any water leakage Connect the water supply hose to inlet valve of the washing machine and then lock it by turning the hose connecting part Check to see if there is a rubber seal inside the connector 3 Connecting Water Supply Hose to the machine Water Supply Hose Rubber Pa...

Page 9: ...not use an extension hose NOTE Never lay down the drain hose as water will be discharged Be sure the drain hose is properly routed so it will not kink or lift from the sink The discharge height should be approximately 0 9 1 2m from the floor Connect the drain hose adjusting the length of it not to be dropped If drain hose is dropped the drainage could be poor because of blockage in the hose For no...

Page 10: ...ng machine temporarily Make sure the water does not leak If the supply cord is damaged it must be replaced by the manufacturer or its service agents or similarly qualified person in order to avoid a hazard Clean regularly to stop linting on the clothes load Check if the drain hose is hung up before operating the washing machine for non pump model Use to level the washing machine for correct balanc...

Page 11: ... the best results different fabrics need to be washed in different ways SOIL Heavy Normal Light Separate clothes according to the type and amount of soil COLOR Whites Lights Darks Separate white fabrics from colored fabrics LINT Lint producers Collectors Separate lint producers and lint collectors Lint Producers Terry cloth Chenile Towels Nappies Diapers Lint Collectors Synthetics Corduroy Permane...

Page 12: ...e amount of water When the WATER LEVEL is automatically detected it may differ depending on the quantity of laundry even though the same WATER LEVEL is indicated on the control panel The amount of a cup in the diagram is about 40g for concentrated Detergent The machine sets the appropriate temperature automatically according to the wash program You can change the Water Temperature by pressing the ...

Page 13: ... Detergent Some Detergents MUST be fully dissolved before adding to your machine to get the best wash results Check the instructions on the Detergent packet If you use powdered Detergent it is essential that the required amount be fully dissolved in very HOT water before being added to WARM or HOT water for the actual wash Pre dissolving Detergent in WARM water when washing in COLD water can impro...

Page 14: ...ser Dilute fabric softener with water Undiluted fabric softener may result in spots that look like oil stains Measure and add the recommended amount of fabric softener into the compartment marked with this symbol Follow manufacturer s direction F Fabric softener is automatically dispensed in the final rinse with indication beep F If you want EXTRA RINSE you must add fabric softener manually when i...

Page 15: ...d to back of stain Replace towels under stain frequently Rinse throughly Wash using hottest water safe for fabric Some inks may be impossible to remove Washing may set some inks Use prewash stain remover denatured alcohol or nonflammable dry cleaning fluid Wash with chlorine bleach if safe for fabric Or soak in oxygen bleach and HOT water before washing Badly mildewed fabrics may be permanently da...

Page 16: ... DELAY When an error occurs an error message appears to indicate the abnormality For example indicates that the lid is open DELAY START RESERVATION BUTTON pushed the button is pushed 3 4 5 11 12 14 16 46 48 3 HOUR switch off refer to page 24 WATER LEVEL BUTTON INDICATION OF DETERGENT AMOUNT Use to adjust the WATER LEVEL as required The appropriate amount of Detergent is shown next to the WATER LEV...

Page 17: ...ter than the standard one it optimizes the algorithm to save the energy by decreasing washing time strength and the LED automatically turns to red If the current washing condition is determined as worse than the standard one it optimizes the algorithm by increasing washing time strength and the LED automatically turns to orange If the current washing condition is determined as equal to the standar...

Page 18: ... the Control panel Addtheappropriatequantity ofDetergentasindicatedby theWATERLEVELnextto WATERDETERGENT OrfollowtheDetergent manufacturer sinstructions Add the appropriate quantity of Detergent as indicated by the WATER LEVEL next to WATER DETERGENT Or follow the Detergent manufacturer s instructions Select the JEAN program on the Control panel Spread the jean evenly in the tub Select the WOOL pr...

Page 19: ... With lightweight bulky loads WATER LEVEL can be set low Changes to Water Temperature HOT COLD and wash level are possible during operation 3 5 6 7 7 7 6 6 6 4 4 4 When setting the WATER LEVEL manually do not set to Medium to prevent damage to laundry Washing with HOT water may damage the laundry Water is set to cold automatically Ensure that the load is under 2kg In order to avoid damage to laund...

Page 20: ...h simultaneously as next image SOAK program only works when socking time is 40 50 or 60 minutes 2 Press the WASH button to select SOAK program 3 Add the Detergent The appropriate quantity of Detergent marked next to the WATER LEVEL of WATER DETERGENT 4 Add the laundry and press the START PAUSE button The WATER LEVEL and the amount of Detergent to be used will be shown and water will be supplied 5 ...

Page 21: ...re 3 Press the AUTO OFF POWER button to turn power on 1 Select the FAVOURITE program 2 Press the START PAUSE button to store start your favourite wash cycle Power turns off automatically after wash 4 Pressing the favourite button allows you to store your favourite wash conditions in the normal cycle memory and then recall it for use at a later time Note To recall your favourite cycle 1 Press POWER...

Page 22: ...power on 1 Use this program to wash quietly in SILENT especially during late night and dawn Note SILENT program takes longer washing time than FUZZY program To reduce noise in spinning spin rpm is lower than normal spinning rpm So the laundry has more moisture than normal Press the PROGRAM button to select SILENT program 2 Press the START PAUSE button 4 ...

Page 23: ... the economical program to minimize water consumption Note Normal can handle all types o clothes that the Fuzzy Coure can do Press the PROGRAM button to select the NORMAL program Ex Large WATER LEVEL is set automatically When the lid is open the machine will not operate and an alarm signal will remind you to close the lid 2 Press the START PAUSE button Left time is displayed ...

Page 24: ...am When you press the START PAUSE button the light will blink The light will DELAY turn on and TIME LEFT will be marked Press the button repeatedly to set the desired finishing time For example To finish washing in 9 hours from now by make the number 9 00 pressing the DELAY START RESERVATION button repeatedly 2 Add the laundry and press the START PAUSE button 5 DELAY START RESERVATION Wash is used...

Page 25: ...re Do not place any laundry inside tub Use this mode once a week Caution For better performance put drain hose down to the floor so that water inside will be completely drained out Select Air Dry above 1 hour Use this mode to reduce the drying time by minimizing remaining moisture on the laundry In general this is very effective on synthetic items 100 polyester Do place laundry which is evenly dis...

Page 26: ...r in the tub has drained completely Then press the START PAUSE button If you do not specify the water level then Medium will be automatically selected If only Rinse is selected the process will start from Water Supply NOTE Press the RINSE button to select the desired times of rinse Only Rinse Press the SPIN button to select the desired times of spin Only Spin 1 Press the WASH button to select the ...

Page 27: ...start washing 2 After all washing conditions are set according to the manual If you want to use the washing machine without alarm signal sounds press both the WASH and SPIN buttons simultaneously To make buzzer work press both the WASH and SPIN buttons simultaneously one more time If you want to unlock during wash press both the RINSE and the SPIN button For 2 second simultaneously again Mute Opti...

Page 28: ... do not recommend that you wash clothes during this procedure If frozen Remove the water supply hose and immerse it in HOT water at approx 40 C Pour approx 2 liters of HOT water at approx 40 C into the bowl and let it stand for 10 minutes Connect the water supply hose to the water tap and confirm that the washing machine performs the supply and drainage of water Wash Inner tub Leave the lid open a...

Page 29: ...50 1 8W R172 R172 150 1 8W 150 1 8W R170 R7 R7 R7 R7 4 3 2 17 17 18 18 19 19 dot2 dot2 min wash min wash 12 12 b b a a a a b b 11 11 time rinse time rinse min spin min spin 10 10 9 a b 7 6 KTC3875 KTC3875 GND GND 300 1 4W 300 1 4W R8 R8 Q1 Q1 300 1 4W 300 1 4W 300 1 4W 300 1 4W 8 11 11 10 10 O6 O6 O7 O7 47k 1 4W 47k 1 4W R9 R9 R10 7 I7 I7 6 I6 I6 150 1 8W 150 1 8W R165 R165 62 62 22 22 57 57 19 19...

Page 30: ...30 4 2 WIRING DIAGRAM ...

Page 31: ...15 5 120 130 7 3 5 120 L M L 6 14 4 120 120 6 3 4 120 M S M 5 13 3 120 100 5 3 3 120 S 3 9 3 120 100 3 3 3 120 Delicate XL L XL 7 10 5 60 100 7 3 5 60 L M L 6 10 4 60 90 6 3 4 60 M S M 5 10 3 60 80 5 3 3 60 S 3 10 3 60 80 3 3 3 60 Wool XL L XL 7 6 5 60 100 7 3 5 60 L M L 6 6 4 60 90 6 3 4 60 M S M 5 6 3 60 80 5 3 3 60 S Quick XL L XL 7 3 5 90 110 60 110 7 2 Wash L M L 6 3 4 90 100 60 100 6 2 M S M...

Page 32: ...ON 2 Keeping clearance Keep the clearance about 2 0 3 5mm between brake lever and P V link as shown in the figure Clutch pulley must be turning to one side P V Link is pulling the brake Lever Clutch pulley must be turning to the left and the right when P V Linke does not pull the brake Lever CAUTION 3 V belt adjustment Adjust the motor pulley by pushing the motor like arrow to make V belt tension ...

Page 33: ...om the front panel Remove the PCB Assembly Fuse is located in the PCB assembly For fuse replacement use the following rated fuse Rating of fuse 250V 6A fusing type for 220 240V product 125V 12A fusing type for 100 127V product 2 Hr 1 Hr 30 min Tubdry AIR AIR DR DRY QUICK QUICK Wash ash leads PCB Assembly Fuse Be sure to make earth connection for trouble diagnosis and parts replacement If impossibl...

Page 34: ...t two connectors and disassemble the power cord Remove a valve fixing screw disconnect the leads form the inlet valve Remove the inlet valve Disconnect the leads the pressure tube from the BP sensor Remove the BP sensor AIR DRY QUICK Wash Hinge Pin Hinge Pin 2 Hr 1 Hr 30 min Tubdry AIR DRY QUICK QUICK Wash ash BP sensor Power cord Inlet valve Back Panel ...

Page 35: ...er fixing screws then disassemble the back cover Disconnect the leads and the drain hose p from the drain pump Remove the pump fixing screws then disassemble the drain pump Fall down the washer for clutch motor removal Remove the belt Disassemble the clutch Remove two motor fixing screws then disassemble the motor 5 Replacement of Damper asm Separate top cover from washing machine As in the fig li...

Page 36: ...ess 3 times Press 4 times Press 5 times Press 6 times Press 7 times Press 8 times WATER LEVEL frequency is on DISPLAY in the condition of no water in TUB After detecting laundry amount the number of pulse is on the DISPLAY AUTO OFF All LEDS ON 64 70 DISPLAY Laundry amount test COLD water HOT water option If Error of water temperature sensor is occured is on the display Shower Valve If the LID is o...

Page 37: ... lines Wash lint givers eg towels flannelette sheets separately from lint collectors eg synthetic fabrics and remove tissues in pockets before wash See page 11 for sorting and caring before loading Do not overload the washer Do not overload the washer Some Detergents need to be pre dissolved check the Detergent instructions Try pre dissolving the Detergent Increase Water Temperature using HOT wate...

Page 38: ... B ASM Is the drain hose located properly Drain hose is not lowered Drain hose is folded or clogged due to freeze or dirts Bad Drain Motor part or WHITE WH 2 pin connector to the P W B ASM has bad connection Laundry in the INNER TUB is filled unevenly Washer is tilted S F S W is too closed to the washing tub or has bad contact Is the CONNECTOR of Ball pressure sensor disconnected or badly tonched ...

Page 39: ...SURE SENSOR is bad or bad contact Is placed magnetic in LID B Connector the Ball Pressure Sensor Pressure Switch or BLUE BL 3 pin connector to P W B ASM has bad connection Ball Pressure Sensor Pressure Switch is bad In the initial state of QC TEST MODE the number on the DISPLAY is less than 63 or more than 70 BLUE BL 1pin connector to P W B ASM has bad connection Check MOTOR CLUTCH V BELT CONDENSO...

Page 40: ...ntroller If there are no defects in the above it should be defect of the controller If supply voltage is 120 higher than rating the varistar in the controller may be broken Check supply voltage Poor Around rating 0V Less than 1 Male female connectors separated Less than 0 5 More than 1 0 10 14V 0V motor is hot Open Over 120 voltage than rating check Defect of the electrical No defect Defect of hou...

Page 41: ...s caused by low voltage in electric supply and recommend using a transfomer if voltage has been continuously low To use a transfomer having a enough capacity if using a transfomer Change the controller Change the controller Where what how to check Result of Check Possible Cause How to repair settle Mains Voltage 1 Measure voltage of the outlet that the washer is plugged into during wash and spin 2...

Page 42: ...ite Selected opposite Filters blocked by foreign substance A connector is taken off Mains cut Mistake of use Wrong installation Mistake of use Don t clean Defect of the inlet valve Defect of contact Coil is open Explain Turn on the tap Correct their locations and turn on the tap Explain how to use Clean them by brush and explain cleaning regulary them Change the inlet valve Reconnect it or remove ...

Page 43: ...cked Defect of the inlet valve Short circuit of the triac of the controller The drain hose should be hung on the stand pipe or the tub Change the part Repair it Check the tube of the Ball Pressure Sensor Pressure Switch it is bent or blocked repair that Repair the blocked hole Change the inlet valve Change the controller Where what how to check Result of Check Possible Cause How to repair settle B...

Page 44: ...ates at both directions Motor doesn t rotates at both directions Normal resistance Unusual operation Defect of controller or poor contact of connectors of motor leads Loose the belt Defect of the clutch Loose the belt The plusator locked Defect of the clutch Defect of the capacitor check the capacitor s capacitance Defect of the motor Motor coil is open Contact defect of the leads Turn the power o...

Page 45: ...is no working sound of the drain pump 3 Check connection parts of the leads if there is no working sound and its resistance is normal Drain Hose 1 Check whether the drain hose is put in a narrow space and kinked 2 Check whether the internal drain rubber asm is bent For Non pump model 3 Check whether the end of the drain hose submerged into water or higher than required For non pump model There is ...

Page 46: ...cked Resistance is normal Blocked hose Drain motor coil is open Contact defect in connection parts or defect of the controller Remove the objects and reinstall so that it can t be kinked Separate the drain motor from the PV link disassemble PV cover and then remove the foreign objects within PV case Check the washer works normally after repair and reassembling them PV link drain motor lever should...

Page 47: ...ter power is turned on Blocked Blocked Bellows deformed Works Defect of the drain motor Defect of PV Bellows Defect of the controller Triac defect Change the drain motor Remove the objects in the PV asm Change the PV bellows The bellows may swell up if it contact petroleum or petrochemical substance because it is made of rubber Change the controller 9 Drain error happens while water drains normall...

Page 48: ... magnetic in LID B Contact defect of the Ball Pressure Sensor Safety Switch Resistance is normal The clearance is less than 2 0mmor more then 3 5mm The gap is normal 2 0 3 5mm Defect of the capacitor or Mechanically locked Defect of the Ball Pressure Sensor Pressure Switch Mistake in use Mistake in use Coil is open Coil is open Defect of connection part or defect of the controller Assembling defec...

Page 49: ...tage 1 Check voltage at the power outlet where the washer is plugged into Starting Capacitor 1 Check the capacitance of the starting capacitor Clutch Assembling 1 Check the clearance between the PV link and the brake lever and clearance between the clutch lever and the adjustment bolt Blocked by foreign objects 1 Check whether the PV asm the drain pump the drain hose are blocked by foreign objects...

Page 50: ...whether the lever of the safety switch touchs the outer tub if touching noise happens Damper 1 Check whether the outer tub cover hit the top cover without load during spin Not leveled Laundry is unbalanced The pulsator rotates initially then the inner tub rotates The lever is bented Hit Defect of installation Defect of the clutch Defect of the safety switch Defect of the damper Level the washer Ex...

Page 51: ... off when turning on the AUTO OFF switch after unplugging the power cord from the outlet 2 It would be defect of the controller if power is automatically turned off immediately when turning on the power switch even though there is no defects in the AUTO OFF switch Automatically turned off Defect in main Mechanical defect of the AUTO OFF switch Explain the cause It happens specially when a high fre...

Page 52: ...ccumulated foreign materials The difference between the sensing value measured from the supplied water by a jig and the sensor value of the product is 5 or more Change the sensor clean the electrode of sensor Stop the sensor working 1 Malfunction Problems Result of check How to repair and settle the accumulated foreign materials on the sensor The difference between the sensing value measured from ...

Page 53: ...ON again power off 4 How to change Controller Group Turn the power switch on by pressing WATER LEVEL PROGRAM and STAIN LEVEL button together Initial Test mode display All LEDs are off except I SENSOR LED Display the number of TR calibration times Display means not calibrated for the first time and so on 1 Press Program button once Display the current Controller Group 1 26 Program button again Decr...

Page 54: ...de Connect the jig put the jig sensor into the washing bath and record the sensed value of the sensor Determine the sensor performance by comparing the value measured by the jig and the value measured by the sensor attached to the product 1 times TR Controller Group 1 26 2 times Check the temperature sensor codition 0 Normal 99 Temperature senosr s error Stop sensing for Temperature and Hardness 3...

Page 55: ...55 5 EXPLODED VIEW TUB ASSEMBLY TOP COVER ASSEMBLY CABINET ASSEMBLY ...

Page 56: ...A010 A230 A240 A202 A201 A200 A190 A151 A152 A100 A160 A210 A275 A276 HOT ORANGE COLD BLUE A160 A181 A184 A220 A051 A030 A040 A026 A020 A023 A185 A052 A053 A060 5 1 THE EXPLODED VIEW OF TOP COVER ASSEMBLY ...

Page 57: ...57 5 2 THE EXPLODED VIEW OF OUT CASE ASSEMBLY F070 F080 F081 F090 F082 F020 F000 F023 F024 F023 F001 F084 For Pump F050 ...

Page 58: ...D VIEW OF TUB ASSEMBLY K000 K090 K010 K020 K100 K170 K180 K064 K190 K011 K012 K027 K021 K025 K028 K201 K200 K210 K220 K250 K040 K030 K050 K061 K060 K062 K140 K160 K230 For Pump K260 K263 K262 K063 For Pump K370 K280 K130 ...

Page 59: ...June 2007 PRINTED IN KOREA P No MFL40322101 ...

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