Daewoo DWM-500M User manual

Service Manual
Washing Machine
Model: DWM-500M
DWM-501M
http : //svc.dwe.co.kr Aug. 1999
DAEWOO ELECTRONICS CO., LTD.
S/M No. : WM500SE000
✔ Caution
: In this Manual, some parts can be changed for improving, their
performance without notice in the parts list. So, if you need the
latest parts information,please refer to PPL(Parts Price List) in
Service Information Center (http://svc.dwe.co.kr).


  
SPECIFICATIONS............................................................................................................................... 2
CAUTIONS ON THE OPERATION...................................................................................................... 3
WIRING AND CIRCUIT DIAGRAM ..................................................................................................... 5
PRINCIPLES OF OPERATION AND EXPLANATION OF FUNCTIONS............................................ 8
HOW TO DISASSEMBLE.................................................................................................................... 16
EXPLODED VIEWS AND RECOMMENDABLE PARTS....................................................................19


SPECIFICATIONS
Explanation table for suffixes of model names
NO ITEM SPECIFICATIONS
50H
Z
60H
Z
1 POWER SOURCE Available in alllocalAC voltage
2 POWER CONSUMPTION NON PUMP 330W
PUMP 410W
3 MACHINE WEIGHT NON PUMP NET : 17.0kg, PACKED UP : 18.5kg
PUMP NET : 18.0kg, PACKED UP : 19.5kg
4 DIMENSION 680 x 406 x 857 (WxDxH, mm)
5 CAPACITY WASH 3.0 kg
SPIN 2.7 kg
6 WATER LEVEL HIGH : 37
 , LOW : 27 
7 OPERATING WATER PRESSURE 0.3 ~ 3.0kgf/cm2 ( 3.0 ~ 30.0 N/cm2)
8 ROTATING SPEED WASH 330 rpm 340 rpm
SPIN 1,450 rpm 1,700 rpm
9 WASHING TYPE Pulsator (Impeller) Type
10 SPINNING TYPE Centrifugally Separated Type
11 WASH TIME Max. 15min., ManualOperation
12 SPIN TIME Max. 15min., ManualOperation
13 PULSATOR 6 WINGS (
 200 mm)
14 WATER SUPPLY MANUAL
POWER SOURCE SUFFIX EXAMPLE
NON PUMP PUMP
AC 110V, 60Hz T TP Modelname PUMP
DW-XXXXNP
Power soure
AC 220V, 60Hz L LP
AC 110/220V, 50Hz D DP
AC 127/220V, 60Hz S -
AC 220V, 50Hz N NP
AC 230~240V, 50Hz M MP
AC100V, 50/60Hz J -


CAUTIONS ON THE OPERATION
1.Installation
- Install the washer in the place easy of access to water, electrical power and drainage.
- Installthe washer on a firm and flat floor.
- Be sure that the washing machine must be grounded with the externalgrounding wire(option) orwith the power cord
and electric outlet of the house.
- Avoid installing the machine where itcan be exposed to rain ordirectray of the sun, that may cause trouble or
discoloration. In case the machine has to be installed in such a place, provide a shield to protect machine from rain
or direct rays of the sun.
- In summeror other periods when there isa greatdifference between the watertemperature and the air temperature,
drops of water may condense on the outside of the tub, and the floor might become wet from dripping; be careful of this.
- Please disconnect the power cord plug after washing.
2. Grounding
- Connect the grounding wire(option) to a water faucet if the pipe is made of metal.
- Make sure thatthe power cord is unplugged during ground work.
- Be sure to wind grounding wire on a metalpipe like Fig1.
(Do not connect the grounding wire end to a gas tube.)
- For maximum security, attach the grounding wire to a copper plate or grounding rod and bury it atleast 20cm in the
ground like Fig2.
Fig. 1 Fig.2


CAUTIONS ON THE OPERATION
3. Caution on Use
- Do not use water which contains rust.
- Never putyour hands into the tub during wash and rinse process.
- This unit is made of poly-propylene, use water below 50

.
- The opening must not be obstructed by carpeting when the washing machine is installed on a carpeted floor.
- Put the wet clothes into the spindryer drum, being sure that they must be well balanced.
- Place the safety cover horizontally on the top.
- Ensure that the spindryer drum completely stops before reaching in to remove the laundry.
Putting in the clothes
Distribute the clothes in
the tub being sure that
nothing is protruding
out of the top.
Check the pockets of the
laundry and remove
contents that shouldn’t
be washed before putting
the laundry into the tub.
Pocket Check
Detergent Amount
If you use too much
detergent. There will be an
excessive amount of suds
and rinsing may be
insufficient: limit the
amount of detergent you use.
Acting Time Of Pulsator
Wash
Action Move Stop
Normal
Reverse
6.8” 4.5”

WIRING AND CIRCUIT DIAGRAM
1. SINGLE VOLTAGE NONPUMP MODEL
2. DUAL VOLTAGE NONPUMP MODEL
5

WIRING AND CIRCUIT DIAGRAM
3. SINGLE VOLTAGE PUMP MODEL
4. DUAL VOLTAGE PUMP MODEL
6

WIRING AND C IRCUITDIAGRAM
5. SINGLE VOLTAGE PUMPMODEL WITHTERMINAL BLOCK
6. SINGLE VOLTAGE NONPUMP MODEL(ONLY FOR JAPAN)
7


PRINCIPLES OF OPERATION AND EXPLANATION OF FUNCTIONS
 TIMER WASH
- Function
The main switch(T1) remains ON during the washing time setby turning the timer knob.
At the same time, the internal switch(T2, T3) provides Power to wash motor alternately at assigned intervals.

Circuit Diagram
AC(V) VIOLET
M
MAIN
T1
BLACK
BLUE
MOTOR
WASH
T2
T2





309 (MAX SET)
900''
(
300 SET
)
 120
T1
Main


PRINCIPLES OF OPERATION AND EXPLANATION OF FUNCTIONS

TIMER SPIN(OPTION)
- Function
The Spin Timer is the switch providing power 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 point comes off after the set time.

Structure and Principleof Activation
1.The main shaft turns due to the unwinding force when the spin timeris turned and the spring wound, with that force
being delivered through each gear and the spring slowly unwinding at a speedfinally controlled by the angle
assembly.
2. The contact point turns ON and the assembly angle is set in motion, which is in the CAM groove in the OFF state,
comes off the groove when the MAIN SHAFT is turned to wind the spring. The contact point turns OFF, return to
CAM groove when the spring unwind completely.
 SAFETY DEVICE FOR MOTORS(OPTION)
In case excessive strain is placed on the motor
due to excessive electricity,over heating, or
overloading so that the temperature of motor
reaches to about 130
 the thermalprotector
attached to the motor shuts off the motor
automatically. In the case the motor does not
operate, until the temperature of motor drops to
about 85
 . It takes about an hour.
 SAFETY DEVICE FOR SPIN DRYER
The spin dryer is an apparatus which eliminates the water from the laundry through centrifugal separation
generated by rapid revolution(approximately 1700rpm for frequency of60Hz).
Accordingly, there are a door switch to cut off the power going into the spin motor when door spin o is opened and
a brake system to stop the rotating spin dryer.
(Violet)
(White)
(Blue)







PRINCIPLES OF OPERATION ANDEXPLANATION OF FUNCTIONS
- Door Switch
When the door spin o is opened during spin drying the lever of the door switch which sites atop the door spin o
falls off the contact, and cuts off the power going into the spin motor.
- Brake System
When the door spin is opened,the link brake and brake wire is loosened.
And then the brake band touches the drum coupling assembly and stops the spin dryer as it is pulled by the
spring in the brake fix plate assembly.
- Brake Band Gap Control
The band brake works best when the gap between it and the drum coupling is about2mm when the door spin is
closed. The spin dryer stops slowly if the gap is too large.
- SPIN BELLOWS ASS'Y
The wrinkled rubber device below the spindryer
is called spin bellows assembly.
It has a waterseal and an oilless metal inside to
prevent leakage and so that spin dryer may work
smoothly.

DRAIN PUMP OPERATION (Pump Model Only)
- Always running during Timer is ON.
DOOR SPIN O
DOOR SWITCH
PANEL B
DOOR SWITCH
LEVER
LINK BRAKE
BRAKE WIRE
(INNER WIRE)
WIREGUIDE
BRAKE WIRE
(OUTER WIRE)
LEVER BRAKE
BRAKE FIX
PLATE
BRAKE BAND
DRUM
COUPLING
BASE
SPIN DRYER
PANEL B
DOOR SPIN O
SPRING


PRINCIPLES OF OPERATION AND EXPLANATION OF FUNCTIONS
- Concerning Wash
Problem Check Point Cause Solution
Pulsator does
not rotate.
Is the Power properly connected?
Is the Motor hot?
(In case there is Thermal Protector)
Is the Wiring good?
(Refer to the Wiring Diagram)
Is the contact of Wash Timer good?
Is the Condenser properly
connected?
Motor does not start due
to opening the Condenser
circuit.
Reconnect the Power Cord.
Reconnect the Condenser.
Power restored when
Motorcools
Power has been cut off
by the Thermal Protector
Improper wiring.
Defective Wash Timer.
Defective Wash Motor.
Defect of mechanical
assembly.
Reconnect the wiring.
Replace Wash Timer.
Replace Wash Motor.
Tighten the screws fixed
on the Pulley.
Replace V-Belt
Remove impurities after
disassembling pulsator.
Replace Case Shaft As..
Replace pulsator.
Reload with properwash
load.
Is there a whirring sound from the
Wash Motor when turned on?
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
Pulsator does not
rotate smoothly.
Is the wash load appropriate?
Are the Pulsator and Motor Pulley
securely assembled?
Does the V-Belt slip?
Are there impurities between the
Pulsator and Tub.
Does the pulsatorshaft rotate propely
when the pulsator has been
disassembled?
Worn out the Serration
within the pulsator.
Defective Case Shaft As.
Worn out V-Belt.
Revolution obstructed by
impurities.
YES
YES YES
YES
YES
NO
NO
NO
NO
NO
Is this Wash Selector
properly positioned? Set the Wash Selector
to WASH RINSE
NO
YES
Pull out the power plug prior repair and make sure that the Washing Machine has been properly grounded.
NOTE


PRINCIPLES OF OPERATION ANDEXPLANATION OF FUNCTIONS
Problem Check Point Cause Solution
Problem Check Point Cause Solution
Pulsator rotate
only in one
direction.
There is excessive
noise during
washing.
The Spin Dryer
does notrotate.
Is the wiring of Condenser properly
connected?
Are there strange noise from Tub when
the Pulsator rotates? Impurtities between
Pulsator and Tub.
Pulsator improperly
assembled.
The contact of Door
Switch is open.
Motor does not start due
to opening the Condenser
circuit.
Tighten the Pulsator fixing
screw.
Keep the Door Spin *O
closed during spin.
Reconnect.
Is the wiring of wash timer properly
connected?
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
Is the Door Spin *O open?
Is there a whirring sound form the
Spin Motor when turned ON?
Is the Condenser properly connected?
Improper wiring.
Improper wiring.
Reconnect.
Defective Wash timer.
Reconnect the Wash
Timer
Replace Wash Timer.
Remove impurities after
disassembling Pulsator.
Something is in contact
with the Pulsator Pulley or
Motor Pulley or other
rotationg parts.
Adjust the parts so that
there are no impurities in
contact with rotating parts.
NO
NO
YES
Set the Spin Selector to SPIN
Is the Spin Selector properly set?
YES
NO
Concerning Spin


PRINCIPLES OF OPERATION AND EXPLANATION OF FUNCTIONS
Problem Check Point Cause Solution
The Spin Dryer
does not rotate.
Is the Motor hot?
(In case there is Thermal Protector)
Is the Wiring good?
(Refer to the Wiring Diagram)
Is the Door Switch Lever properly
placed on the Door Spin *O?
Assemble after loosening
Link Brake and
adjusting downward.
Power restored when
Motor cools
Power has been cut off
by the Thermal Protector
Improper wiring.
Defective connection
Improper wiring
Reconnect the wiring.
Replace Door Switch or
reshape the Lever.
Reconnect the terminal.
Replace the Spin Motor.
Replace the Spin Timer.
Reload the clothes so they
are well balanced.
Tighten the Boltin Drum
Coupling Assembly
Reload the clothes and
press down the Safety
Cover into Spin Basket.
NO NO
NO
NO
NO
NO
NO
YES
YES
YES
YES YES
YES
YES
YES
YES
YES
There are strange
noise and severe
vibration during
spinning.
Is the Door Switch terminalproperly
connected?
Is the contact of Spin Timer good?
Is the wash load well balanced?
Are clothes or the Safely Cover
stuck out of the Spin Basket?
Is the assembly between the Drum
Coupling Assembly and Spin Motor
or Spin Dryer loose?
Is The Spin Dryer itself well Balanced?
Tub is in contact with the
object stuck out.
Improper structural assembly
Spin Dryer unbalance Re-assemble Spin Dryer.
Defective Spin Motor
Defective Spin Timer
Spin Dryer does not
balanced due to wash load.
Brake wire is too long
The Brake Band is touching
the Drum coupling Assembly.
NO
NO
NO


PRINCIPLES OF OPERATION ANDEXPLANATION OF FUNCTIONS
Problem Check Point Cause Solution
Problem Check Point Cause Solution
There are strange
noise and severe
vibration during
spinning.
There is leakage
during spin drying.
Spin Dryer does
not stop with the
open.
DoorSpin *O
Drainage is not
satisfactory.
Does the Brake Band touches the Drum
coupling when the Door Spin *O open.
Is the electric connection ofthe Door
Switch good?
Brake wire is too short
Brake Band is worn out.
Defecive Door Switch Replace Door Switch
The Drain Hose is too High.
Impurities are obstructing
drainage.
Impurities are obstructing
drainage.
Impurities are blocking the
Drain Hose.
Replace Brake Band or
Brake Fix Assembly.
Hang the Drain Hose lower
Disassemble Pulsator and
take out impurities in Drain
strainer
Remove impurities or
replace Case Valve or
inlet joint.
Remove impurities
Is the Bellows Assembly properly
assembled? NO
NO
NO
NO
NO
YES
YES
YES
YES
Is the height ofthe drainage area where
the Drain Hose hangs over1m?
(pump model)
Are there impurities in the Drain Strainer?
Are there impurities in the case valve or
Inlet Joint.
The Waterseal or the Oilless metal in the
Bellows Assembly worn out.
Waterproofing not working
due to defective assembly.
The waterseal or the oilless
metal in the Bellows
Assembly is worn out.
Replace Bellows Assembly
Re-assemble Bellows
Assembly.
Replace Bellows Assembly.
Assemble after loosening
Link Brake and adjusting
upward.
The contact of the Door
switch does not open due
to deformity of the Lever
of Door Switch.
Replace Door Switch or
reshape the Lever of
Door Switch.
YES
YES
YES
NO
Concerning Drainage


PRINCIPLES OF OPERATION AND EXPLANATION OF FUNCTIONS
Problem Check Point Cause Solution
Water Keeps
draining during
wash
Draining does not
function during
drain selecting
Draining does not
function during
Spin drying
Is the Drain Selector is at the DRAIN
position?
Is the link valve broken?
Is the pump Motor wiring properly
connected?
Drain valve connotbe
opened.
Defective wiring
Defective wiring
Defective Spin Timer
Defective Pump Motor
Reconnect wiring
Reconnect wiring
Change the Spin Timer.
Change Pump Motor.
NO
NO
NO
NO
YES
YES
YES
YES
Are the wiring of the Spin Timer and
the Pump Motor good?
Is the Spin Timer's contact good?
Misoperation
There are impurities
between the Case Valve
and Valve Bellows.
Turn Drain Selectorto
WASH/RINSE positon
Remove impurities. Or
replace Case Valve.
Change the link valve.
Defective Pump motor Replace Pump Motor
YES
NO


HOWTO DISASSEMBLE
1. REPLACING WASH TIMER AND SELECTOR SWITCH.
1. Remove 2 screw on the back cover B 2.Separate connector to harness assembly.
3. Separate link valve from the valve rod. 4.Remove plate from tub.
5. Remove 2 screws on panel. 6.Separate the panel assembly.
7. Remove the door switch. 8.Remove the knob.




HOW TO DISASSEMBLE
9. Remove 4 screws on bracket panel. 10. Remove wash timer and selector switch.
2. Replacing wash andspin motor
1. Separate main harness assembly. 2. Remove nut and bolt on spin basket shaft
and remove spin basket.
3. Remove a belt connecting motor 4. Separate link brake from the brake
pulley and pulsator pulley. wire assembly.


HOWTO DISASSEMBLE
5. Remove 3 screw fixing the 6. Remove cap screw(2EA) and 5 screws
drain pump. (pump model) on flange of the tub. And lift up the tub assembly.
7. Remove 3 screws and spin motor. 8. Remove 3 screws and spin motor.


EXPLODED VIEWS
1.PANELASS’Y