Table of contents Chapter I : Twin Tub Washing Machine 1. Technical point of some key parts ----------------------- 2 1-1. Spin Timer --------------------------------------------------------- 1-2. Drain Pump -------------------------------------------------------- 1-3. Pressure Switch -------------------------------------------------- 1-4. Safety Device of Motors --------------------------------------- 1-5. Safety Device of Spin Dryer ---------------------------------- 1-6.
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Chapter II : Fully Automatic Washing Machine 1. Specification of New Models ------------------------------- 29 1-1. DWF-100M's ------------------------------------------------------- 29 1-2. DWF-900,160,170's ---------------------------------------------- 30 1-3. DWF-750, 800's --------------------------------------------------- 31 2. Sequence Chart of New Models --------------------------- 32 2-1. DWF-100M's, 100C's, 1098's, 1094's, 1089's ------------ 32 2-2.
1. Technical point of some key parts 1-1. Spin Timer Function The Spin Timer is the switch providing to the Spin Motor(Drain Pump Motor) during the set spin dry time, and is a spring-type time switch comes on upon turning and those contact points comes off after the set time.
c) water level being high : The Drain Pump is turned on when the water level reaches approx. 9.5cm above level High. It is then turned off when the water level returns to level High. It is operated automatically so that the water level maintains between level High and approx.
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Door Switch When the Door Spin *0 is operated during spin drying the Lever of the Door Switch which sites the Door Spin *0 falls off the contact, and cuts off the Power going into the Spin Motor. Brake System When the Door Spin *0 is opened, the Plate Control Wire which sites separately atop and Door Spin *0 drop down and loosens the Link Wire and Link Brake.
Brake Band Gap Control Method The Band Brake works best when the gap between it and the Drum Coupling is about 2mm when the Door Spin *0 is closed. The Spin Dryer stops slowly if the gap is larger in which case the screw of the Wire Guide may be loosened and adjusted upwards.
3. Improvements of New Models 3-1. DW-160C(170C) Problems of DW-7510 Improvements of DW-7510 Date Improvements of DW-160C DRAIN SELECTOR KNOB is hard to New made CONTROL LEVER 2000. 8. Proper path with short arm and easily rotate. rotated. - Arm length : short - Arm length : long - Abnormal path for maximum stroke - Normal path is enough for valve stroke...
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Problems of DW-7510 Improvements of DW-7510 Date Improvements of DW-160C 2 A. Vibration when Spinning is too severe. Number of supporting points : 3→4 2000. 8. New designed BRACKET MOTOR B. Swing of SPIN TUB - No. of dampers : 4ea - No.
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Problems of DW-7510 Improvements of DW-7510 Date Improvements of DW-160C 3 Loosening of the DRUM COUPLING bolt Reinforce the fixing torque by changing 2001. 5. Redesign the DRUM and BOLT - BOLT : M6 bolt and nut (M6→M8) - DRUM : Iron casting→Press & Bush - Unbalance weight of DRUM itself - Unbalance weight of DRUM itself - BOLT : M8 &...
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Problems of DW-7510 Improvements of DW-7510 Date Improvements of DW-160C 5 Water leakage through the TUB holes Add the TUB CUSHION (2ea) 2001. 3. Redesign the TUB mold (Slide cores) LOCK TUB CUSHION HOLE 6 SPIN DOOR hinge is separated from Add a LOCK not to be taken out 2000.
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Problems of DW-7510 Improvements of DW-7510 Date Improvements of DW-160C 9 INNER COVER crack Additional ribs and roundings 2001. 3. A. Additional ribs from the beginning ROUNDING AT ROUNDING AT EVERY CORNER EVERY CORNER ADDITIONAL RIBS ADDITIONAL RIBS B. Increase the diameter of HINGE Ø6 HINGE Ø7 HINGE 8010...
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Problems of DW-7510 Improvements of DW-7510 Date Improvements of DW-160C 10 WATER SELECTOR KNOB is not No countermeasures Smooth when starting by Rounding edge smooth when starting ROUND EDGE SHARP EDGE 11 STOPPER of BRACKET PANEL broken Reinforce the ribs 2001.
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Problems of DW-7510 Improvements of DW-7510 Date Improvements of DW-160C 12 OILLESS BEARING stick to the shaft 2001. 6. Cu BEARING from the beginning Change the material (Fe→Cu) (Especially in Dominica) Fe (White) Cu (Yellow) Cu (Yellow) 13 LEAD WIRES cut by vibration & touch Using WIRE CLAMP 2000.
3-2. Others Problems Models Supposition of Cause Solution Date 1. We made the smoothness of surface as a 1. Water leaks DW-2520 1. We found the surface of the shaft was 01-09-01 between shaft DW-3633 a little rough, especially where water seal control point.
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Problems Models Supposition of Cause Solution Date 2. Another reason is lack of grease inside 2. Increased the grease on WATER SEAL. 01-09-01 the WATER SEAL. (Weight of grease : 0.5g) More Greased 2. Pulsator pulley DW-2520 1. The center part of P-Pulley was little 1.
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Problems Models Supposition of Cause Solution Date 2. The center hole was a little big so 2. Reducing the center hole size by 0.2 mm. 00-03-23 rotating shaft wore out the center hole. - Hole size : Ø9.8 × 7.8mm - Hole size : Ø10.0 ×...
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Problems Models Supposition of Cause Solution Date 3. Screw fixed DW-2520 After many kinds of test, our conclusion I think it could be improved by redesign pending parts of Panel B is as follows. CUSHION TOP. But it needs additional is broken.
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Models Problems and countermeasures Countermeasure Details Date DW-5010 Problem Continuous washing (Do not stop rotation) 2000. 09. VIBRATOR - Old mold of CASE, Smaller shaft hole - Disturb main shaft rotation Solution Make a new mold for TIMER CASE - Accurate MAIN SHAFT hole size SHAFT HOLE Problem DOOR S/W taken out 2000.
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Problems and countermeasures Models Countermeasure Details Date Problem Lower side deformation of PACKING BOX 2000. 08. Dent line around side of BOX Solution A. Make a gap between BOX and bottom B. BOX roller cleaning to prevent dent of sides (BOX Vendor) 10mm DW-3633 Problem OILLESS BEARING stick to the shaft...
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Problems and countermeasures Models Countermeasure Details Date Problem VALVE HOUSING crack 2001. 07. - More cases in winter (Cold weather) J700 J640A Solution Change the material (J700 → J640A) - Homo polymer → Co-polymer - Co-polymer has high resistance to impact...
4. TROUBLE SHOOTING GUIDE Note : Pull out the power plug to repair and make sure that the Washing Machine has been properly grounded. Concerning Wash Check Point Problem Cause Solution Is the Power properly connected? Reconnect the Power Cord Agitator does not rotate.
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Check Point Problem Cause Solution Worn out the Serration Replace Agitator Does the Gear Housing Shaft within the Agitator. rotate properly when the Agitator Agitator has been disassembled? does not rotate smoothly. Defective Gear Housing Replace Gear Housing Is the wiring of Wash condenser Improper Connection Reconnect Agitator...
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Check Point Problem Cause Solution Is the Condenser properly Reconnect Motor does not start due The Spin connected? to opening the Condenser Dryer circuit. does not spin. The Brake Band is touching Brake wire is too long. Assemble after loosening the Drum Coupling Wire Guide Screw and Assembly.
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Check Point Problem Cause Solution The Waterseal or the oilless Replace Bellows Assembly metal in the Bellows Assembly worn out Is the Bellow Assembly properly Re-assemble Bellows Waterproofing not There is assembled? Assembly working due to leakage defective assembly during spin drying Replace Bellows...
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Concerning Drainage(Pump Model) Check Point Problem Cause Solution Is the height of the drainage area The Drain Hose is too Hang the Drain Hose Drainage where the Drain Hose hangs over high lower is not satisfac- tory Are there impurities in the Drain Impurities are obstructing Disassemble Agitator and Strainer?
1. Specification of New Models Model : DWF-100M's Appearance Specifications * Ratings : depend on buyers * Power Consumption : depend on buyers * Overall Dimension (W*D*H) : 630*670*1040 mm * Net Weight : Approx. : 48 kg * Washing Capacity : depend on buyers * Standard Water Consumption : Approx.
Model : DWF-900, 160, 170's Appearance Specifications * Ratings : depend on buyers * Power Consumption : depend on buyers * Overall Dimension (W*D*H) : 598*643*956 mm * Net Weight : Approx. : 43, 42 kg * Washing Capacity : depend on buyers * Water Level : 4 steps * Standard Water Consumption : Approx.
Model : DWF-750, 800's Appearance Specifications * Ratings : depend on buyers * Power Consumption : depend on buyers * Overall Dimension (W*D*H) : 525*858*535 mm * Net Weight : Approx. : 32.5 kg * Washing Capacity : depend on buyers * Water Level : 3 steps * Standard Water Consumption : Approx.
2. Sequence Chart of New Models Model name : DWF-100M's, 100C's, 1098's, 1094's, 1089's rinse 2 process washing process rinse 1 process spin process water water water water water water washing washing spin spin spin 1 spin 1 rinse1 rinse1 spin 2 spin 2 rinse2...
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rinse 2 process washing process rinse 1 process spin process water water water water water water washing washing spin spin spin 1 spin 1 rinse1 rinse1 spin 2 spin 2 rinse2 rinse2 supply supply supply supply supply supply display display remain remain time...
Model name : DWF-900's, 160's, 170's, 174W's rinse 2 process washing process rinse 1 process spin process water water water water water water washing washing spin spin spin 1 spin 1 rinse1 rinse1 spin 2 spin 2 rinse2 rinse2 supply supply supply supply...
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rinse 2 process washing process rinse 1 process spin process water water water water water water washing washing spin spin spin 1 spin 1 rinse1 rinse1 spin 2 spin 2 rinse2 rinse2 supply supply supply supply supply supply display display remain remain time...
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Model name : DWF-750's, 800's rinse 2 process washing process rinse 1 process spin process water water water water water water washing washing spin spin spin 1 spin 1 rinse1 rinse1 spin 2 spin 2 rinse2 rinse2 supply supply supply supply supply supply...
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rinse 2 process washing process rinse 1 process spin process water water water water water water washing washing spin spin spin 1 spin 1 rinse1 rinse1 spin 2 spin 2 rinse2 rinse2 supply supply supply supply supply supply display display remain remain time...
3. Sequence Chart of Electrical Parts washing process washing process rinse 1 process rinse 1 process rinse 2 process rinse 2 process spin process spin process water water water water water water washing washing spin 1 spin 1 rinse1 rinse1 spin 2 spin 2 rinse2...
4. Main Function of PCB Function DWF-100M's,100C's,1098's DWF-900's, 160's, 170's, 174W's DWF-750's, 800's Load Sensing The washer check the amount of clothes to correspond with proper water level in order to save water and detergent and environment before starting washing with dry-clothes condition. Priciple : please refer to attached report.
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Function DWF-100M's,100C's,1098's DWF-900's, 160's, 170's, 174W's DWF-750's, 800's Unbalanced The washer have a function of checking of unbalanced load after washing and rinse process especially in the beginning Clothes of Spin mode in order to prevent noise and vibration and movement of washer from happening by using of safety Switch. Checking Error "UE"...
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Function DWF-100M's,100C's,1098's DWF-900's, 160's, 170's, 174W's DWF-750's, 800's Door open It is same with above "UE" mode. "LE" mode is shown. Checking "LE" This function mainly is to be used when Spin process, because if Lid is in opened-status when Spin mode (Lid Error) it will cause a very dangerous situation like a customer's casualties.
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Function DWF-100M's,100C's,1098's DWF-900's, 160's, 170's, 174W's DWF-750's, 800's "E9" signal The PCB have a function of checking frequency from Pressure switch in order to decide the proper water level after load sensing process. If no frequency is checked by Micom, PCB display the "E9" error mode. Checking point here is that check the connector and wire-open and Micom condition.
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Function DWF-100M's,100C's,1098's DWF-900's, 160's, 170's, 174W's DWF-750's, 800's Fuse for The washer composed of several electrical parts especially Inlet valve, synchronous Motor, Bubble generator. Electrical parts These parts use the coil. If the coil is damaged, it give a bad influence to the function of Triac in the PCB. In order to prevent these parts from breaking, 315mA Fuse is used and assembled in the Harness Ass'y.
5. The Principle of Load Sensing 1. Concept Experienced customers know how much is the approximate weight of laundries what they want to wash, and how much of water will be proper for the laundries. So the customers can select the proper water level and amount of detergent so as not to damage the laundries and not to waste water and not to contaminate environment.
6. TROUBLE SHOOTING GUIDE COURSE PROBLEM (DAMAGED) PARTS CAUSE SOLUTION Valve Inlet Refer to the TROUBLE SHOOTING FLOW Refer to the TROUBLE SHOOTING FLOW P.C.B. As CHART. CHART. Water is not Connections supplied. Rubber Packing of Hose Inlet As clogs the hole Hose Inlet As Reassemble the Hose Inlet As.
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COURSE PROBLEM (DAMAGED) PARTS CAUSE SOLUTION Difference between Guide Filter and Tub I. Reassemble or change the Guide Filter. Guide Filter Remove the flash, round the edge part or Scratch or edge part of Tub I, Pulsator, Pulsator change the scratched parts (especially the edge Tub I Screw.
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COURSE PROBLEM (DAMAGED) PARTS CAUSE SOLUTION Motor Tub I does not Refer to the TROUBLE SHOOTING FLOW Refer to the TROUBLE SHOOTING FLOW P.C.B. As rotate. CHART. CHART. V-Belt Tub I rotates so Spinning begins before the water is not Water Check and repair the draining system.
Testing(Demonstration) Mode Testing(Demonstration) Mode DWF-100M’s, 100C’s, 1098’s, 1094’s, 1089’s Page 1 The operation condition of the washer can be checked without water in the tub by test mode of the P.C.B. ass’y. How to Operate Test Mode Turn off the power. Keep pressing3 buttons (‘WASH’...
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DWF-100M’s, 100C’s, 1098’s, 1094’s, 1089’s Page 2 The condition of Pressing button Display Items being checked normal operation Drain-cold inlet v/v-hot inlet To check the PCB v/v-dispensor v/v-pulsator rotate Rinse All LED function speedily. blink (right)-pulsator rotate (left)- This is PCB checking pump-load data-door check- mode.
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DWF-100M’s, 100C’s, 1098’s, 1094’s, 1089’s Page 3 The condition of Pressing button Display Items being checked normal operation Fuzzy course is run Aging Mode for P.C.B. Spin 3 times Remain repeatedly ass’y. time...
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DWF-900’s, 160’s, 170’s, 174W’s Page 1 The operation condition of the washer can be checked without water in the tub by test mode of the P.C.B. ass’y. How to Operate Test Mode Turn off the power. Keep pressing two buttons (‘DELAY’ ‘PROCESS’) together and press the power button. Remove your fingers from the two buttons.
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DWF-900’s, 160’s, 170’s, 174W’s Page 2 The condition of Press button Display Items being checked normal operation Drain-cold inlet v/v-hot inlet To check the PCB v/v-pulsator rotate (right)- Process 1time All LED function speedily. pulsator rotate (left)-pump- blink This is PCB checking load data-door check- mode.
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DWF-900’s, 160’s, 170’s, 174W’s Page 3 The condition of Press button Display Items being checked normal operation Fuzzy course is run Aging Mode for P.C.B. Remain Course 3 times repeatedly time ass’y.
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DWF-750’s, 800’s Page 1 The operation condition of the washer can be checked without water in the tub by test mode of the P.C.B. ass’y. How to Operate Test Mode Turn off the power. Keep pressing two buttons (‘Course.’ ‘PROCESS’) together and press the power button. Remove your fingers from the two buttons.
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DWF-750’s, 800’s Page 2 The condition of Press button Display Items being checked normal operation To check the PCB Wash R-wash L-bubble-hot inlet Process 1time All LED function speedily. v/v-cold inlet v/v-drain-pump- blink This is PCB checking load data-door check-auto off mode.
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DWF-750’s, 800’s Page 3 The condition of Press button Display Items being checked normal operation Aging Mode for P.C.B. Fuzzy course is run Remain Course 3 times ass’y. repeatedly time...
8. Radical Function The Introduction of The Introduction of Radical Washing Technology Radical Washing Technology - 57 - R&D Center of Washing Machine, Daewoo...
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• Development of Low Temperature Sterilization = Radical Washing Tech. • Sterilization, Deodorization, & Friendship with Environmental xpected Effect (1) sterilization of Staphylococcus aureus & Candida albicans (2) sterilization of E-Coli - 5 8 - R&D Center of Washing Machine, Daewoo...
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[ generater of ozone ] --> ozone( O ) --> [ catalyst ] --> active oxygen(·O·) 〓≫ 2. [[Under water | ·O· + H O --> 2 OH· ]] (active oxygen + water --> Radical) - 59 - R&D Center of Washing Machine, Daewoo...
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Radical : Sterilizing Power 1. Bubble+Detergent : 47.4% - Test Inst. : FITI in Korea Yeast 2. Radical+Detergen : 97.4% 1. Bubble+Detergent : 53.6% Staphylococcus 2. Radical+Detergen : 96.6% aureus - 6 0 - R&D Center of Washing Machine, Daewoo...
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Remark Sample 15min 60min 1. Bubble 15.0% 70.0% - Test orgon. : FITI in Korea Ammonia 2. Radical 95.0% 95.0% Sulfureted 1. Bubble 8.2% 66.4% 2. Radical 63.6% 96.4% Hydrogen - 6 1 - R&D Center of Washing Machine, Daewoo...
9. Gear Mechanism 9-1. Washing and spin Mode Drain valve Motor Brake lever control bolt clutch lever Braker band clutch boss Gear mechanism ( washing ) (spin ) At the beginning of Drain, 2) Brake lever push the Contol bolt and clutch lever. (Brake lever opens the Braker ) 3) Clutch lever opens the clutch boss freely..
9-2. Structure Pulsator shaft Spin shaft Gear unit Braker lever Control bolt Clutch lever C-L Tip Clutch boss Clutch spring Braker 1) Clutch lever Tip have to be overlapped in Clutch boss 3 - 5mm when washing. 2) C-L Tip have to be seperated to the Clutch boss after Drain valve motor pull the Brake lever. 3) Control bolt contacts to the Brake lever smoothly.
9-3. Concerning Clutch Spring 1. THE STRUCTURE OF GEAR MECHANISM 2. HOW TO CHECK THE CLUTCH SPRING PROBLEM 3. THE PROCESS OF DISASSEMBLE 4. THE PROCESS OF ASSEMBLE...
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1. THE STRUCTURE OF GEAR MECHANISM Clutch Lever Bearing Clutch Boss Clutch Tip Clutch spring Coupling Pulley Spring Washer Fastening Nut Pulley Shaft Clutch Boss Ass'y Pulley Shaft Fastening Nut Coupling Spring Washer Drum plate Pulley...
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2. HOW TO CHECK THE CLUTCH SPRING PROBLEM. PROBLEM 1) THE LAUNDARY IS IN THE SPIN TUB UNEVENLY WHEN JUST STARTING SPIN PROCESS. 2) THEREFORE, IT CAUSE THE SERIOUS NOISE AND VIBRATION WHEN WASHING AND SPINNING PROCESS OR SUPPLING WATER IRREGULARY WHEN SPINNING PROCESS AND CAUSE SHORT OF SPIN PERFORMANCE.
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3. THE PROCESS OF DISASSEMBLE Disassemble 1 Process Notice Use wrench or driver - ratchet handle - extension bar - socket : 10mm Remove the protector Release screws marked 4-point Remove the v-belt Belt Use fixing jig for pulley as to see fig1. and 17mm-socket for nut Loosen the fastening nut Fastening Nut...
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Disassemble 2 Process Notice Disassemble the pulley Pulley Catch the boss and pull upward with spiral rotate in the clockwise direction Disassemble the clutch boss assembly Clutch Boss Ass'y Separate coupling from clutch boss ass'y Coupling Clutch Boss Ass'y Clean the drum plate, coupling surface and contact face between drum plate and coupling...
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4. THE PROCESS OF ASSEMBLE Assemble 1 Process Notice Check the uneven face of coupling is assembled upward Uneven Face Assemble the coupling Coupling - Push in the clutch boss ass'y with rotating on the clockwise direction. - After assembling, rotate on Assemble the new clutch the clockwise more 2~3 teeth boss ass'y...
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Assemble 2 Process Notice - Use fixing jig and 17mm socket wrench as if disassembling, as fastening torque about 100~200kgf-cm. Assemble the fastening nut - Check the end-play, up and downward and check the binding force, too much or not on bi-direct of rotation.
10. Technical Report 10-1. Air Bubble System Old model New Model Appearance Plate T Air Bubble Generator Air Bubble Generator Performance exactly same Operating source electronic AC power mechanical power (of Motor rotation) Assemble position on the right of rear part of Plate T Attached to the Motor, bottom area of Outer Tub...
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