Samsung SW12E1S-XST, SW12E1P-XST Service Manual

WASHING MACHINE

SW12E1S(P)/XST

SERVICE

Manual

WASHING MACHINE CONTENTS

Caution for the safety during servicing

1. Product Features

2. Technical Points

3. Schematic and Circuit and PCB Pattern Diagram

4. Cautions in Servicing

5. Troubleshooting

6. How to Disassemble

7. Exploded Views & Part List

8. Product Specifications

!

1. Do not allow the customer to repair the product.

☞ The person may be injured or the product life may be shortened.

2. Execute A/S after unplugging the power supply unit.

☞ Be care of the electric shock.

3. Do not plug several plugs in the same outlet.

☞ It may cause the fire due to overheat.

4. Check the damage, pressing or burning of the power plug or outlet.

☞ Replace it promptly if it has problem.(It may cause the electric shock or fire)

5. Do not clean the main body with the water.

☞ It may cause the electric shock and fire and shorten the product life)

6. The wiring of the harness shall be free from the moisture and tightened during serving.

☞ It shall not be deviated by certain impact.

7. Remove any dust or filth on the housing section,wiring section,connection section during servicing.

☞ Protect the cause of the fire such as the tracking,shortage and etc.

8. Check any mark of the moisture on the electrical parts, harness section and etc.

☞ Replace the parts or remove the moisture.

9. Check the assembly status of the parts after servicing.

☞ Maintain the status before servicing.

10. Pull out the power cord with holding the plug.

☞ Be care of the electric shock and fire when the cord is damaged.

11. Unplug the power plug from the outlet when the wash machine is not used.

☞ Be care of the electric shock and fire due to the strike of the lightening.

12. Do not use or store the spray or flammable materials(including gasoline,alcohol and etc.)
around the wash machine.

☞ Be care of the explosion or fire due to the electric spark.

13. Do not put the bowl of water or wet laundry on the wash machine.

☞ If the water is penetrated to the wash machine, this may cause the electric shock or fire.

14. Do not install the wash machine in the place where the snow or rain falls.

☞ It may cause the electric shock and fire and shorten the product life.

15. Do not push the control buttons with the awl,pin, or sharp materials.

☞ It may the electric shock and trouble.

16. Check the wash machine is leveled horizontally and installed properly on the floor.

☞ The vibration may shorten the product life.

17. Joint the wire by the connector correctly.

☞ When the wire is jointed by the tape, this may cause the fire due to the tracking.

18. When the wash machine is to be laid for the service, put the pad on the floor and lay the
product at side slowly.

☞ If the wash machine is laid front, the relay may be damaged by the tub.

19. When the wash-heater is replaced, check it is inserted in the bracket-heater and screw the nut.

☞ If the wash-heater is not inserted in the bracket-heater properly, this may cause the noise and

leakage since it is contacted to the drum.

Caution for the safety during servicing

!

1. Product Features

SAMSUNG ELECTRONICS CO., LTD 1

Whirling washing tub

* The laundry becomes cleaner

than ever since the laundry is
turned over in the whirling tub and
washed by the beating of the
higher whirling embossing on the
tub.

Washing by the strike of
the strong falls

* The strong falls vigorously strike

the full load of laundry or the large
laundry to clean. The light bedding
is pressed even for the old dirt to
be thoroughly removed.

No detergent remnants in the deter­gent and the softener dispensers.

* The powder detergent is solved to the liquid

detergent in order to prevent the contamina­tion of the environment.

* If the softener is put in the dispenser, it is auto-

matically flushed during the rinsing cycle.

Detergent Compartment

Softener Compartment

Leveling feet

* Since the leveling feet are

on the front, it is conve­nient to adjust by hand.

Large filtering net

* Since the lint or other substances

are thoroughly collected by the fil­tering net that is more than 2 times
larger than the existing one, you
can feel the difference by the far
cleaner laundry.

Wider variety of rinse
selection

* By adding the rinse selection button,

during the rinsing cycle, not only water
is supplied, but also water can be added
to the higher water level than that of the
washing cycle and so on.
Consequently, you have more choices
to select the rinsing mode.

Water spouting washing hands

* The water spouting washing hands shoot up the water

columns in the water to prevent the laundry from being entan­gled. The water columns shot up by the water spouting wash­ing hands prevent the laundry from being
entangled in substituted for the rod
and they wash the laundry
by scrubbing, which is
the merit of the revolving board
washer, as well. As a result, the
cleaning ability is also excellent.

2. Technical Points

2-1 Each Key & Display

2-2 Definition of Function for Each Key

1. Course Key

1) Before pressing the initial start key or while in pause, each time this key is pressed, one of the courses is selected in the follow­ing order.

Fuzzy → Bedding → Wool → Spin Only → Rinse Only

2) While in operation by the effective selection of the course, the input of this key is ineffective. However , it makes the input sound.

3) When changing the course after a Pause while in operation by the effective input of the Course key, the default value of each
cycle in the finally selected course is set even if each cycle (the number of rinsing cycles) has been changed by using the Manual
key in the previous course.

4) While in operation by the effective selection of the course, the input of all the keys except the Course key is effective.
However, during the spinning cycle, only the Start/Pause key and the Power key are effective.

5) The weight sensor functions only in the Fuzzy course and the Rinse Only course.
Each time the Water Level key is pressed,

Low→Medium→High→Medium→Low→Small→Minimum

Small is selected in order.

2 SAMSUNG WASHING MACHINE

WATER

SUPPLY

HOT/WATER

COLD/WATER

HIGH

MEDIUM

LOW

SMALL

MINIMUM

REMAINING TIME/MIN

1 TIMES
2 TIMES
3 TIMES

LEVEL INDICATOR

START/PAUSE

POWER

FUZZY

BEDDING

WOOL

SPIN ONLY

RINSE ONLY

WATER

LEVEL

COURSE

RINSE

ADDITION

6) Table of Function for Each Course

7) While in operation by the effective course key, the corresponding mode can be updated by the Rinse Addition key input.
However, the Rinse Off is skipped.

8) While in the initial stage of Power On (while the Fuzzy course is selected), after switching from the Fuzzy course to another
course before the Start key input, the corresponding mode can be updated by the Rinse key input.

9) While the Fuzzy, Bedding, or Wool course is in progress, press the Pause key and then the Rinse Addition key to increase the
number of the rinsing cycle.
Each time the Rinse Addition key is pressed, one is selected as shown below. (before entering the rinsing cycle)
E.g.) Fuzzy course One time → Two times → Three times → Off

10) When the Fuzzy, Bedding, or Wool course is selected, the cycles are fully automatically proceeded.

11) When the Spin Only is selected, the Spin Only mode is carried out and the Rinse Addition key can be input. (before the Start
key input)

12) When the Rinse Only is selected, the Rinse Only mode is carried out.
Each time the Rinse Addition key is pressed, one is selected as follows. (before entering the rinsing cycle)

One time → Two times → Three times → Off

13) On starting the selected course, the LED indicating the corresponding course is ON/OFF at 1 sec interval. While in Pause, the
LED is ON.
* 1) The LED for the Water Supply and W ater Level are ON/OFF at 1 sec interval. When supplying water is done, it is kept ON.

2) The LED for the Rinse Addition is ON until the rinsing is done.

SAMSUNG ELECTRONICS CO., LTD 3

Classification Fuzzy Bedding Wool Spin Only Rinse Only

High water level 18 min 18 min 6 min x x

Medium water level 18 min 18 min 6 min x x

Low water level 18 min 18 min 6 min x x

Small water level 12 min x 6 min x x

Minimum water level 12 ,om x x x x

Rinse Addition Range 1-3 times 1-3 times 1-3 times 1-3 times 1-3 times

Default Value 2 times 3 times 2 times x 1 times
Default Value 6 min 9 min 1 min 6 min x

Default Value of Water

Cold water Cold water Cold water x Cold water

Supply Selection

Water Level Setting Range

Small- High x x x Small- High

by Weight Sensor

Water Current Pattern A B C x D

Washing

Time

Number of

Rinsing

Cycles

Spinning

Time

2.

Rinse Addition Key

1) The input of this key is always effective except while in progress of the intermittent spin, the spin, or the pause mode.

2) After selecting the Rinse Only and before inputting the Start key, one is selected by touching this key as follows.

One time

→

Two times

→

Three times

→

Off

(Same in the initial stage of Power On)

3) While in progress of the Rinse Only mode, if the Course key is pressed, only the key input sound is produced.

4) While in progress of the Rinse Only mode, if the Pause key is pressed and then the Course key is input, the Rinse Only mode
is cancelled to switch to the selected mode.

5) When the number of the rinsing cycles is changed, one previously carried out is canceled and the finally selected one is applied.

6) While in operation or after a pause, this key can be input until the final rinse is done just before the draining cycle starts.

3. Water Supply Key

1) The input of this key is always effective except in the Error mode.

2) Each time this key is pressed, one is selected in the following order.

Cold water

→

Hot & Cold water

→

Hot water

3) When the water supply selection is changed by inputting this key, the selected water supply maintains even if the course is
changed.
When changed to the Wool course, automatically cold water is selected. However, when changed to another course again, the
previous water supply selection is applied again.

4) The Error in Paragraph 1) is as follows.
(1) Water Supply Error (2) Draining Error

5) While in supplying water, the lamp for the corresponding water supply flashes in the way of 1 sec ON/OFF.

4 SAMSUNG WASHING MACHINE

4. Start/Pause

1) Each time this key is input, one is selected in the following order.

Start → Pause

2) This key carries out the Error canceling function.
(1) Water Supply Error (2) Draining Error

3) When restarting after a pause, the delay time of the drive part is as follows.

5. Water Level Key

1) The input of this key is always effective except in the Error mode.
Error: Water Level Sensor, Water Supply Error, Draining Error

2) Each time this key is input, one is selected in the following order.

Low → Medium → High → Medium → Low → Small → Minimum → Small

3) When the Bedding course is selected, only the low water level or higher can be selected.

4) When the Wool course is selected, only the small water level or higher can be selected.

5)

While a water level is selected, if the course is changed to the Wool or Bedding course after a pause, in case of the Bedding course, if
the previous water level is below the Low, the water level is automatically set to the High, however, if the previous water level is the Low
or higher, the previous water level is applied. In case of the Wool course, if the previous water level is below the Small, automatically
the high water level is set. However, if the previous water level is the Small or higher, the previous water level is applied.

6) After supplying water is done just before the motor runs, if the water level is changed by touching the water level key , the remain­ing time is recalculated since the water supplying time for the corresponding water level is changed.

7)

Changing washing time according to the water level in the Fuzzy course is applied only before the motor starts to run. After the motor
starts to run, washing is proceeded according to the washing time for the previous water level regardless of the water level change.

8) While — is displayed as the initial data in the Fuzzy course, by inputting the water level key, the remaining time for the corre­sponding water level immediately appears.
However, if the Start key is input in the initial stage of the Fuzzy without inputting the water level key, — is displayed until the
weight sensing is done.

SAMSUNG ELECTRONICS CO., LTD 5

Operation Mode Drive Part

Operation Mode

Pause Mode Operation Mode Remarks

Water Supply

Mode

Water supply

valve

Rinse valve

Washing Mode

Motor

MR. ML

Draining/Stop

Draining

Motor

Spin Mode

(including

Intermittent

Spin)

Draining

Motor
Motor

(ML)

2 sec

2 sec

4 sec

10 sec

10 sec

The delay time when
carrying out the cancel­ing function by the UNB
sensor is 10 sec.

2-3 Main Functions

2-3-1 Washing Cycle

1. Water Supply Mode

1) In the water supply mode of each cycle, the valve for the corresponding water supply is on according to the water supply selec­tion until the selected water level is reached.

2) The water level selection is as follows. (Unit: water amount-l, Frequency: KHz)

3) The selection of the water supply valve-ON for each cycle according to the water supply stated in Paragraph 1) is as follows.

Note) 1. When only the hot water is selected, for the initial 20 sec of supplying water at the beginning of washing, the cold water

valve is on.

→ To avoid the damage of the cloth and to solve the detergent completely

2. While in rinsing, the water supply selection is applied only to the Rinsing 1 as shown in the table above. In the Rinsing
2 or later, only cold water is supplied.

4) While supplying water , the corresponding lamp is ON/OFF at 1 sec interval. When the water supply is done, the corresponding
lamp is on.

5) When supplying water is not done after the standard time allotted for supplying water is over, the remaining time does not
decrease.

6) When supplying water is done before the standard time allotted for supplying water is not over, the remaining time is compelled
to decrease according to the allotted time and then the next cycle starts.

7) When supplying water is not done 60 min later after starting the water supply, the Water Supply Error mode is carried out.
(including the water supply or the additional water supply for clearing the unbalance)

8) After supplying water is done, if the water level key is input and the selected level is higher than the previous one, water is sup­plied to the selected level. Meanwhile, the motor is off and the remaining time is not reduced while in supplying water.

9) Table of Water Supply Time for Each Water Level

Water Level High Medium Low Small Minimum Remarks

Water Supply Time 5 min 4 min 30 sec 4 min 2 min 30 sec 1 min 30 sec

10) While in operation, if the water level drops below the reset, water is supplied to the selected water level and then the operation
proceeds.

11) When the water level reaches the one that is one level lower than the selected level while in supplying water, the motor starts to
run with the default water current pattern. When the selected water level + 200 Hz are reached, the motor is off. (excluding the
small water level or lower)
* 1. Motor running time out 30 sec

2. This procedure is carried out in washing or rinsing as well.

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Reset Minimum Small Low Medium High

25.20 23.76 23.21 22.75 22.12 21.9

Water Supply Selection Washing Rinsing 1 Rinsing 2, 3 Added Water

Cold water Cold water Cold water Cold water

Hot, Cold water Hot, Cold water Hot, Cold water Cold water

Hot water Hot water Hot, Cold water Cold water

Following the water supply
selection for each of Washing,
Rinsing 1, Rinsing 2/3

2.

Washing Mode

1) After reading the selected water level and washing is carried out for 2 min or 9 min, the motor is off for 3 sec to read the fre­quency of the water level. If the water level is lower than the selected water level, water is added to the selected water level and
then washing proceeds. The time for adding water does not exceed 30 sec.
* While in rinsing, water is added 1 min later after the rinsing cycle starts.

2) Table of Water Current Pattern during the washing cycle of each water level for each course according to the washing selection
(see the appendix)

3) For each course or each water level, the water addition mode is carried out 2 min or 9 min after the washing cycle starts and 1
min after the rinsing cycle starts. The time out is 30 sec.
Although the washing time is changed by the washing-adjusting key while in washing cycle after the water addition mode, the
water addition mode is not carried out.

4) In case that the water addition mode is carried out twice in a course, even though the time for any cycle is changed, no more
water addition mode is carried out.

5) When the washing time is changed after the water addition mode is carried out once, it is carried out once more within the
changed washing time.

2-3-2 Rinsing Cycle

1. Draining Mode

1) The draining valve is kept ON.
If the water level at the initial stage of this mode is higher than the reset, the delay mode is carried out for 50 sec after reading
the reset. If lower than the reset, it is carried out for 20 sec.

2) The remaining time decreases while the draining mode is carried out until the standard time for draining is over. After that, the
remaining time does not decrease any longer.
When this mode is done, the standard time for draining is considered to be over.

Water Level High Medium Low Small Minimum Remarks

Draining Time 2 min 10 sec 2 min 1 min 50 sec 1 min 30 sec 1 min 20 sec Excluding 50 sec delay

3) When the water level is higher than the reset in 15 min after starting the draining mode, the draining error mode is carried out.
The buzzer sounds 5 times and the pause mode is carried out.

4) If the Start key is input during the step 3), the error is cleared, the time out is set to 15 min again, and then draining begins.

2. Intermittent Spin Mode

1) If the door is open while in this mode, this mode is paused and the door open alarm (5 times of the door open melody) sounds.

2) If the door is closed while the door open alarm sounds, the alarm stops and the operation proceeds in the same way when the
Start/Pause key is input.

3) When the safety S/W detects the unbalance while in this mode, the unbalance clearing mode is carried out.
① Unbalance detecting mode

- Checker S/W detecting time: 20 ñ 449 ms

- When the door is open (Reed S/W detecting), the drive part is turned off immediately after 20 ms is detected.
When the door is closed while the door open alarm sounds, the alarm mode is canceled, the draining valve is on in 10
sec after it is off, and then the motor restarts after the draining valve is on.

➁ Unbalance clearing mode

- When the unbalance occurs while in spinning after the washing cycle ends, this mode is carried out in the same way
when one rinsing cycle is added. When the unbalance is detected while in rinsing, water is supplied and then the next
rinsing step is proceeded. When the unbalance occurs during the final spin, the clearing mode is carried out up to twice.
At the third time, the unbalance alarm sounds.

- At the beginning of the clearing mode, ‘the standard time for supplying water + 1 min’ is added to the initial remaining
time of the corresponding cycle. The clearing mode is carried out with the disentangling water current for 1 min after
supplying water.

- When the unbalance error occurs, ‘UE’ flashes in the way of 1 sec ON/OFF and the error melody sounds 5 times.

- When the unbalance occurs while in the spin only mode, the error alarm sounds.

SAMSUNG ELECTRONICS CO., LTD 7

3. Spin Mode

1) This mode is carried out by turning the washing motor counterclockwise. The draining valve is kept on during the correspond­ing spinning time.

2) The other functions are the same as those of the intermittent spin mode.

3) The spinning time after washing or rinsing, or the final spinning time is shown in the time chart.

4. Pause Mode

1) This mode is carried out by turning off MLfor 1 min 30 sec and keeping the draining valve on.

2) When the door is open while in the pause mode of the rinsing cycle, the door open error occurs. When the door is closed again,
the restart mode is carried out.

3) When the door is open while in the pause mode of the final spinning cycle, the ending mode is carried out.

5. Draining Mode

1) The same as the draining mode of the washing cycle.

6. Rinsing Mode

1) When the selected water supply is done, rinsing starts according to the water level.

2) The rinsing time is 2 min 30 sec regardless of the number of rinsing cycles. However, in the Wool course, it is 2 min.

3) Table of Water Current Pattern during the rinsing cycle of each water level for each course (see the appendix)

2-3-3 Spinning Cycle

1) The same as the intermittent spin mode or the spin mode of the rinsing cycle.

2) In the Wool course, spinning is carried out by 10-sec ON and 5-sec OFF.

2-3-4 Ending Cycle

1) This mode is carried out when all the selected cycles are done.

2) While in this mode, the end melody sounds and all the drive parts are off.
Meanwhile, ‘00’ is displayed by 1-sec ON/1-sec OFF.

3) When this mode ends, the automatic power relay off is carried out.

8 SAMSUNG WASHING MACHINE