SAMSUNG S821 Service Manual

WASHING MACHINE

S621GWL/YLW

S621GWS/YLW

S821GWL/YLW

S821GWS/YLW

SERVICE Manual

WASHING MACHINE		CONTENTS

Caution for the safety during servicing 1. SPECIFICATIONS

2. SAFETY DEVICES

3. OVERVIEW OF THE WASHING MACHINE

4. OVERVIEW OF THE CONTROL PANEL

5. MAIN FUNCTION

6. TECHNICAL POINT

7. GENERAL ERROR FUNCTION

8. TROUBLE DIAGNOSIS

9. TEST MODE

10. DESIGNATION OF MAIN COMPONENTS

11. PCB SCHEMATIC DIAGRAM

11-1. PCB CIRCUIT DIAGRAM

12. SETTING UP A WASH MACHINE

13. ASSEMBLE AND DISASSEMBLE

14. TOOLS FOR DISASSEMBLY AND ASSEMBLY

15. EXPLODED VIEW AND PARTS LIST

Caution for the safety during servicing

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.((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,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--is not inserted in the bracket-heater properly, this may cause the noise and leakage since it is contacted to the drum.

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1. Specifications

WASH TYPE			FRONT LOADING TYPE
DIMENSION	GROSS		W 680mm X D 478mm X H 892mm
	NET		W 598mm X D 340mm X H 844mm
WATER PRESSURE			50 kPa ~ 800 kPa
WEIGHT	GROSS		58 kg
	NET		55 kg
WASH and SPIN CAPACITY			3.5 kg (DRY LAUNDRY)
POWER CONSUMPTION	WASHING		220 V		110 W
			240 V		110 W
	WASHING and		220 V		900 W
	HEATING		240 V		1050 W
	SPIN	MODEL	S821		S621
		220-240V	200 W		170 W
	PUMPING		34 W
WATER CONSUMPTION			43ℓ(STANDARD COURSE)
SPIN REVOLUTION	MODEL		S821		S621
	rpm		800		600

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2. Safety Devices

We adapt 5 safety devices for users to use this wash machine safely.

1)Balancing device (ASSY-Main PCB)

→When the laundry is out of balance, to prevent the noises and vibrations, the unbalance detecting sensor helps the laundry laid even and continue the dehydating process.

2)Anti-over water supply device

→Because water supply value is broken, once water is supplied to the 2/3 level of the door, the

water supplied is drained automatically, Over -flow error is displayed on the panel

3)Temperature-regulating device(thermistor)

→To prevent over-heating over the temperature setted up, THERMISTOR senses the temperature of the machine continuously and helps the wash machine to work at the temperature given by users.

4Overheatingcontrolling system

→Under the circumstances of THERMISTOR inferiority or abnormal condition, if wash-heater is overheated, automatically, assy -thermal fuse cuts off the power supply to protect the machine to keep it safe.

5)Delicate clothing safeguard function(ASSY-Main PCB)

→To protect the clothings which is weak to high temperature, the wash machine senses the temperature inside the washing tub. if the temperature rises over 50 wool washing course and Delicate washing course display abnormal water temperature on the panel , after draining the water.

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3. Overview of the Washing Machine

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4. Overview of the control panel

S821

S621

1

2

3

4

5

6

7

1

2

3

4

5

6

7

1.Detergent dispenser

2.Display panel

Displays wash cycle and error messages by LED lamps.

3.Course button

Press the button repeatedly to select one of the six availabel wash program. {Cotton.Synthetics.Delicates .Quick.Rinse+Spin.Spin.Cotton }.

4. Temperature selection button

Press the button repeatedly to cycle through the available water temperature options (cold, 40 °C , 60 ° C and Bio 60 ° C).

*Bio 60°C : To improve the Wash efficiency, heating during 30 min.

5.Spin selection button

Press the button repeatedly to cycle through the available spin speed options.

S821 no spin, 600, 800 rpm

S621 no spin, 600 rpm

6. Start/Pause button

Press to pause and restart programs.

7. 1 (On/Off) button

Press once to turn the washing machine on, press again to turn the washing machine off. If the washing machine power is left on for longer than 10 minutes without any buttons being touched, the power automatically turns off.

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5. Main function

1) Auto power S/W off function

●After power on, the auto power S/W off function automatically switches power off for you if you do not press selection button for 10 minutes

●After selecting the function, the auto power S/W off function automatically switches power off for you if you do not press start/pause button for 10 minutes

●After finishing the last function, the auto power S/W off function automatically switches power off for you if you do not re-select the course button or manual button

2) Door open function

●If door is open during the operating, all operating is halted, and door error message will be displayed and error melody will coming out

●Door open error can be cleared by colosing the door. the operating keeps going on

3) No spin function

● If no spin function selected, the operating is finished after last rinse

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5. Main function

4) Power-out compensation function

●If power is out on selected process, the process before power out is stored to EEPROM, once power is back the process before power out continues.

●When power is back, washing process starts from the process at the point of the power out, rinse/drain process starts from the initial process.

POWER-OUT COMPENSATION FUNCTION PROCESS

START	WASHING	RINSE/DRAIN	RINSE/DRAIN
			FINISH
		START	PROCESS
	POWER OUT		POWER OUT
		SAVE DATA
SAVE DATA		to EEPROM
to EEPROM	POWER BACK		POWER BACK
READ DATA	MICOM RESTORE		MICOM RESTORE
	RESTART
(PROCESS+TIME)
	PROCESS

5) Water heater Error function

This function starts working, when the heater works abnormally.

(this function begins sensing the heater 1 minutes later, after the heater operating)

The value of the initial thermistor(A1) is compared with that of the thermistor(A2) in 2 minutes (Y=A2-A1)

-For 10 minutes, the variance of temperature(Y) is less than 2 "course led 6ea on 40 /60 led on" message is displayed on the panel.

The value of the initial thermistor(A1) is compared with that of the thermistor(A2) in 2 minutes (Y=A2-A1)

-For 2 minute the variance of temperature increases more than 4.5 (0.2148V) "course led 6ea on cold/60 led on" message is displayed on the panel.

At this time heater, Error "course led 6ea on cold/60 led on" is displayed and all working process off

The heater operating continues during heating hours, if washing hour is left over, the residual washing process keeps going without heating.

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5. Main function

6)Fuzzy washing function ( weight-sensing)

After finishing initial water supply, when the fall of the water level needs supplementary water supply, Sensing function perceives the weght with the supplementary water supply numbers and starts to work. Under the course of Cotton, if the supplementary water supply numbers become 3 - 4 times the

function is going at default condition ( high water level ), if 1-2 below that is going at middle level, if 0 below low water level, heating hours and rinse hours depend on the above data.

	Washing hours		Rinse water level
	Cotton
High	Default		Default
Middle	Default-12	min	22.80KHZ
Low	Default-25	min	23.30KHZ

After sensing weight, above hours is decreased from above default hours

7) Bubble -detecting function

At the each condition of washing&dehydrating , rinse&dehydrating , hydrating, bubble -detecting function works, this function works 5times normally, if the function detects bubbles at 6 times , the bubble-detecting function stops and go on to the next process.

●The bubble-detecting function during washing & dehydrating to rinse & dehydrating

after 2 times instant dehydrating and before main dehydrating, if the water level is under 25.45KHZ, Bubble

→Detecting function thinks there are bubbles and add the bubbles-removing rinse, needing hours are above hours and 6 min 40 sec.

→The bubble-detecting function during single hydrating process

after 2 times instant dehydrating and before main dehydrating , if the water level is 25.45KHZ below or during main dehydrating, water level data is 23.80KHZ below Bubble-detecting function thinks there are bubbles and add the bubbles-removing rinse 1 times, needing hours are above hours and 5 min 50 sec.

	Bubble-detecting function operating process
			210rpm		210rpm
		20 sec
		laundry scattering
	draining &reverse	unbalance
		detecting range
	1 min 20sec
		20sec	5sec	15sec	5sec	15sec
				bubble detection
				(default water level 25.45KHZ below)
			- 8 -

5. Main function

8)Unbalance detecting & laundry balance positioning system

Just before the hydrating process and just after reversal rotation for balancing laundry position, this function is carried out

The initial 6 sec is the period of reversal rotation for balancing laundry position , Drum rotates 50rpm for initial 6 sec

Next 10 sec, the rotation increases the speed from 50 rpm to 90 rpm slowly

During the next 18 sec, drum rotates at the speed of 90 rpm, the sensor decides the degree of laundry unbalance with TACHO data which is attached to motor

If the degree of unbalanced laundry is over 6 times to default value, laundry balancing system carryies out feed back process 6 times

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6. Technical point
1) Motor on/off time at each course												unit:sec
	Course			Washing					Rinse			Motor r.p.m
		Cw		Off	Ccw	Off	Cw	Off		Ccw	Off
	Cotton	13		3	13	3	10	5		10	5	50
	Synthetics	7		8	7	8	7	8		7	8	40
	Delicates	5		10	5	10	5	10		5	10	30
	Quick	12		3	12	3	10	5		10	5	45

2) Final dehydrating r.p.m at each course				unit:rpm
		Model	S821	S621
	Course
	Cotton		800	600
	Synthetics		800	600
	Delicates		600	600
	Quick		800	600

You can change the r.p.m to the above a table by use spin button under no spin situation.

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6. Technical point

3) The water level data at each course

unit:Khz

	Water level	Default water level(khz)		Supplemetary water	Supplemetary water
	Course			START(Khz)	end(khz)
	Washing		23.50	24.00	23.70
	Cotton	large	22.45
		middle	22.80	24.00	23.50
	Rinse
		small	23.30
	Washing		23.50	24.00	23.70
	Synthetics		22.45	24.00	23.50
	Rinse
	Washing		22.80	23.55	23.35
	Delicates		22.65	23.55	23.35
	Rinse
	Washing		23.50	24.00	23.70
	Quick		22.45	24.00	23.50
	Rinse

4) The other water level data

The water data unter each conditon
1st water supply (only preparation)	24.60		1st water supply level to washing tub
Overflow error	20.50		The water supplied reach 2/3 of door
Bubble	25.45		Bubble -detecting water level
detectingatwashing/rinse/dehydrating
Bubble detecting rinse water level	22.00		The water level which can detect bubblesunit:Khz
Water level which can open door	23.80	over	It is possible to open the door
Water level which can drive heater	24.50		Safety water level of wash heater
Water level which can reset the drain	24.50		The water level can be detected after 1st draining

If water level is 15KHZ below or 30 KHZ above , sensor-pressur is out of order so needs changing.

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10. Designation of Main Components

10-1 Normal / Reverse Revolution of Motor and R. P. M. Control

8	Rotor	9	+
			CW
5	Stator coil	10	-
8	Rotor	9	+
		5	CCW
			-
	Stator coil	10
5
	<Figure1>

1	2	3	4	5	6	7	8	9	10
DEE PSHGI H		OHC AT		DEE PSELD DMI		ROT ) CET C05 OR 1( P	ROT OR
				ROT AST
						STATOR
		WASHING MOTOR							H

<Figure2>

	(± 7%)	STATOR(51)	ROTOR(8.9)	TACHO(3.4)	PROTECTOR(6.7)	"H"(mm)	Code-No.	Remark
	Resistance	2.08Ω	1.99Ω	38.8Ω	0	30	DC31-00002H	S821
	value							S621
	Rated			220~240V/50Hz
	value
10-2 Door safety Device

When Door is closed, door stay closed. if "set" is operated, power supplied to , wires have bymetal keep the door closed, and electronical power flows between and make it operate.

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