SAMSUNG SG626ECSWQDOR Service Manual
REFRIGERATOR
Model : SR-L676EV
SR-L678EV
SR-L626EV
SR-L628EV
GREEN
REFRIGERATOR |
CONTENTS |
1. Precautions
2. Product Specifications
3. Electrical Part Specifications & Standard
4. Circuit Diagram
5. Functions & Operating Instruction
6. Circuit Descriptions
7. Troubleshooting
8. Parts List
9. Disassembly & Assembly
10. PCB Circuit Diagram
SR-L676EV
SR-L678EV
11. PCB Parts List
SR-L626EV
SR-L628EV
12. Specifications of Main Components
ELECTRONICS
© Samsung Electronics Co., Ltd
August, 1998
Printed in Korea
Code No. DA68-60281C
1. Precautions
Warning : Please abide by the following precautions in order to conduct the maintenance procedures in a safety fashion.
1-1. Caution when doing repairs
•Do work after extinguishing fire in the surrounding area. When freon-gas makes contact with the heater, hazardous gas will leak out.
•Don’t use welding machines in confined indoors.
•In the case of gas leakage, always open the windows.
•When cutting the SUCTION, DISCHARGE pipe of the compressor, always take caution of the inner pressure of the remaining gas.
1-2. Take out the power plug
• Always take out the power plug from the 
outlet when doing repairs.
1-3. Be careful of electric shocks
• When inspecting the circuit, don’t touch 
the battery charger and be careful of
electric shocks.
1-4. Use proper components
• Always use the component labeled in the service component chart when replacing components for repairs.
1-5. Use proper tools
• Always use proper tools for repairs. If worn out tools are used, it would cause defects in tuning and electrical contact, leading to accidents.
1-6. When doing repairs, inspect the POWER CORD or whether there is fire in the lead 
wire and make sure they are replaced.
1-7. Cutting of LEAD-WIRE
• For connecting the lead-wire that has been 
cut off, use soldering or connector and
always disconnect the vinyl tapes.
1-8. Check for disconnection
• After completing the assembly, always measure the disconnection resistance level, and turn on the power after checking it is above 1MΩ.
1-9. Earth
• Check the status of earthing and repair the incomplete ones.
1-10. Be careful of children
•There is always the possibility of danger involved so make sure children can’t come nearby when doing repairs.
Cleaning : After completing repairs, clean the surrounding area and the refrigerator and tell the consumer about the repairs being made.
Refers to prohibition.
Refers to prohibition of dismantling.
Refers to prohibition of contact.
Refers to guidelines which have to be followed.
Refers to detaching the power plug from the outlet.
Refers to earth connection for preventing electric shocks.
Refers to possibility of death or serious injury of a person.
Warning
Refers to possibility of injury of a person or damage to property.
Caution
Samsung Electronics |
1 |
Reference
Reference1 The connection of DOOR-CABI
MAIN
PCB
BLK |
1 |
1 |
1 |
1 |
BLK |
BRN |
2 |
2 |
2 |
2 |
BRN |
RED |
3 |
3 |
3 |
3 |
RED |
ORG |
4 |
4 |
4 |
4 |
ORG |
YEL |
5 |
5 |
5 |
5 |
YEL |
PNK |
6 |
6 |
6 |
6 |
PNK |
BLU |
7 |
7 |
7 |
7 |
BLU |
PUR |
8 |
8 |
8 |
8 |
PUR |
GRY |
9 |
9 |
9 |
9 |
GRY |
WHT 10 |
10 |
10 |
10 |
WHT |
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S/BLU |
11 |
11 |
11 |
11 |
S/BLU |
CON7 |
12 |
12 |
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PANEL
PCB
Reference2 Inspection of Relay
NO |
CON9 |
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C |
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NC |
CON10 |
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MAIN PCB |
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Coil bisection |
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Coil bisection |
CON8 |
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Measure after |
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separation |
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(Relay Movement) |
*First separate the housing connected to the main PCB CON C8, 09, 10 and measure the following items.
1.Measure the coil bisection of the relay and check whether it works.
2.Measure the apex bisection for open circuit.
Apex category The voltage of |
Judging the apex |
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coil bisection |
bisection |
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DC 12V(Operation) |
C:NO SHORT |
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Apex 3 |
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C:NC OPEN |
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C:NO OPEN |
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DC 05V(Standstill) |
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C:NC SHORT |
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Apex 2 |
DC 12V(Operation) |
SHORT |
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DC 0V(Standstill) |
OPEN |
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Note) C → Common, NO → Normal open, NC → Normal close
3.When it operates as above, it is normal and when it does not operate, report the corresponding relay.
36 |
Samsung Electronics |
Reference3 Check for malfunctioning of the subordinate
Short |
Measure after separation |
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CON9 |
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CON9 |
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RED |
8 |
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R-Defrost heater |
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7 |
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SWINT MOTOR |
5 |
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R-C/FAN |
3 |
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RED |
R-Lamp |
1 |
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CON10 |
9 |
CON10 |
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F-Lamp |
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F-C/FAN |
7 |
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COMP. |
5 |
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Note) The compressor is impossible to measure resistance by the running and starting condenser.
*Cut off the power code, separate the housing from the main PCB CON 08, 09, 10 and measure the following.
1.Measure resistance between the terminals and check for malfunctioning of L/W.
Subordinate
R Defrost heater F Defrost heater Comp
Swing motor R-Circulation fan F-Circulation fan R-Lamp F-Lamp
Measurement |
Evaluation of mea- |
terminal |
surement result |
CON9 & CON10
CON8 & CON10 0Ω or ∞Ω(defect) CON8 & CON10 Impossible to measure 0Ω indicator CON8 & CON9 0Ω or ∞Ω(defect)
CON8 & CON9
CON8 & CON10
CON8 & CON9
CON8 & CON10
Reference4 |
Inspection of the sensor |
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R2 ROOM |
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4 |
4 |
CON2 |
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R1 ROOM |
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3 |
3 |
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2 |
2 |
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1 |
1 |
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CON3 |
1 |
1 |
MAIN PCB |
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F - ROOM |
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2 |
2 |
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R / DEF - SONSOR |
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3 |
3 |
CON3 |
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4 |
4 |
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F / DEF - SONSOR |
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5 |
5 |
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6 |
6 |
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Measure after separation
*Separate the housing connected to main PCB CON2 and CON3.
*Resistance value lowers while temperature rises, because it is a NTC type sensor.
1.R1 sensor measures resistance of CON2 between ~ .
2.R2 sensor measures resistance of CON2 between ~ .
3.Freezer sensor measures resistance of CON3 between ~ .
4.R-defrost sensor measures resistance of CON3 between ~ .
5.F-defrost sensor measures resistance CON3 between ~ .
6.The measurement value above is calculated by comparing the present temperature of the sensor and the temperecture table in specification found in the manual.
Samsung Electronics |
37 |
Reference5 Checking the Door S/W
F - Door S/W |
|
CON6 |
1 |
1 |
MAIN |
|
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PCB |
2 |
2 |
DC 12V |
3 |
3 |
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R - Door S/W |
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(Micom signal)
(Refrigerator Bulb)
1.Open the door and check if the freezer bulb turns on.
2.Press the Door S/W and check if the freezer bulb turns off.
3.Close the door of freezer and repeat 1 and 2 for refrigerator.
4.If there is a problem, check bulb and door S/W.
5.Check wire connection.
1.Check if CON6 and is 0V DC after closing the F·R doors.
2.Check if CON6 is 12V DC when opening F door. Check if CON6 is 12V DC when opening R door.
3.If there is problem, check door S/W and wire connection.
Reference6 |
Forced starting & forced defrosting |
TEST S/W |
(Forced starting)
*This function is used to turn on the comp and fan immediately regardless of the temperature of freezer.
1.Press the button on the PCB after removing the main PCB cover from the upper part of refrigerator.
2.Buzzer will sound to indicate the forced starting.
(Forced defrosting)
*This function is used to turn on the defrosting regardless of defrost time.
1.Press the button twice during forced starting. Then, defrosting is performed.
2.If the button is press 3 times during R- defrosting, F-defrosting is also performed at the same time.
3.If the button is pressed 4 times during R-f defrosting, test mode is released.
38 |
Samsung Electronics |
Reference7 Sensor resistance and voltage conversion table for temperature
(Sensor pressure voltage 10KΩ – Voltage converted by the F-reference)
* Voltage conversion table depends on H/W structure of MICOM port input voltage.
Sensor Short : Micom 0V.
Sensor Open : Micom 5V.
Sensor partial pressure resistance 10KΩ
TEMP. |
Resistance KΩ ± 1% |
Voltage(V) |
TEMP. |
Resistance KΩ ± 1% |
Voltage(V) |
TEMP. |
Resistance KΩ ± 1% |
Voltage(V) |
– 35 |
68.648 |
4.364 |
– 13 |
22.832 |
3.477 |
9 |
9.016 |
2.37 |
– 34 |
65.011 |
4.333 |
– 12 |
21.814 |
3.428 |
10 |
8.673 |
2.322 |
– 33 |
61.595 |
4.301 |
– 11 |
20.848 |
3.379 |
11 |
8.345 |
2.274 |
– 32 |
58.384 |
4.268 |
– 10 |
19.932 |
3.329 |
12 |
8.032 |
2.227 |
– 31 |
55.366 |
4.235 |
– 9 |
19.062 |
3.279 |
13 |
7.732 |
2.18 |
– 30 |
52.526 |
4.2 |
– 8 |
18.237 |
3.229 |
14 |
7.446 |
2.134 |
– 29 |
49.854 |
4.164 |
– 7 |
17.453 |
3.178 |
15 |
7.172 |
2.088 |
– 28 |
47.337 |
4.127 |
– 6 |
16.709 |
3.127 |
16 |
6.910 |
2.043 |
– 27 |
44.967 |
4.09 |
– 5 |
16.001 |
3.076 |
17 |
6.659 |
1.998 |
– 26 |
42.733 |
4.051 |
– 4 |
15.328 |
3.025 |
18 |
6.420 |
1.954 |
– 25 |
40.626 |
4.012 |
– 3 |
14.688 |
2.974 |
19 |
6.190 |
1.911 |
– 24 |
38.640 |
3.972 |
– 2 |
14.080 |
2.923 |
20 |
5.970 |
1.869 |
– 23 |
36.765 |
3.93 |
– 1 |
14.501 |
2.872 |
21 |
5.759 |
1.786 |
– 22 |
34.995 |
3.888 |
0 |
12.949 |
2.821 |
22 |
5.557 |
1.786 |
– 21 |
33.323 |
3.845 |
1 |
12.424 |
2.77 |
23 |
5.363 |
1.745 |
– 20 |
31.743 |
3.802 |
2 |
11.924 |
2.719 |
24 |
5.178 |
1.705 |
– 19 |
30.250 |
3.757 |
3 |
11.447 |
2.668 |
25 |
5.000 |
1.666 |
– 18 |
28.838 |
3.712 |
4 |
10.993 |
2.618 |
26 |
4.829 |
1.628 |
– 17 |
27.502 |
3.666 |
5 |
10.559 |
2.567 |
27 |
4.665 |
1.59 |
– 16 |
26.237 |
3.62 |
6 |
10.146 |
2.518 |
28 |
4.508 |
1.553 |
– 15 |
25.040 |
3.573 |
7 |
9.752 |
2.468 |
29 |
4.357 |
1.517 |
– 14 |
23.906 |
3.525 |
8 |
9.375 |
2.419 |
30 |
4.212 |
1.481 |
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Samsung Electronics |
39 |
2. Product Specifications
|
Model |
SR-L628EV SR-L678EV |
SR-L626EV |
SR-676EV |
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Type |
(LMF(Freezer/Refrigerator) 2 Door) |
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Freezer performance |
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(4-STAR) |
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Temperature control |
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Electronic control |
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Water dispenser |
Yes |
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No |
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Net Capacity |
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Freezer |
171(6.04) |
192(6.78) |
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171(6.04) |
192(6.78) |
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Refrigerator |
345(12.18) |
376(13.28) |
351(12.39) |
382(13.49) |
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3 |
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l/(ft ) |
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Total |
516(18.22) |
568(20.06) |
522(18.43) |
574(20.27) |
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820X715X1790 (mm) (SR-L626(8)EV) |
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Net dimension |
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(WXDXH) |
820X765X1790 (mm) (SR-L676(8)EV) |
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Refrigerant |
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HFC-134a(160gr) |
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Foam |
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Cabinet insulation |
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CYCLO-PENTANE |
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Door insulation |
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CYCLO-PENTANE |
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Liner |
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Cabinet |
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A.B.S |
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Door |
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A.B.S |
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Net weight |
114Kg |
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113Kg |
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3. Electrical part specifications & standard
Refrigeration Cycle
ITEM |
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STANDARD |
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Model |
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SR-L626/628EV SR-L626(8/676(8)EV |
SR-L676/678EV |
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Input Source |
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220V |
240V |
115V |
127V |
220V |
240V |
|
Model |
SK182H-L2U SK182Q-L2U SK182E-L2W SK182P-L2W |
SK190H-L2U SK190Q-L2U |
||||
Compressor |
Starting type |
RSCR |
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CSR |
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RSCR |
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Oil charge |
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Freon α-15(ESTER) |
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Evaporator |
Freezer |
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Split Fin Type |
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Refrigerator |
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Split Fin Type |
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Condenser |
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Forced & Natural Convection Type |
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Dryer |
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Molecular Sieve XH-9 |
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Capillary tube |
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ID0.85XL2500 3.79kg/cm2 |
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Earth screw |
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BSBN(Brass screw) |
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Door switch |
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250V/0.5A |
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2 |
Samsung Electronics |
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ITEM |
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STANDARD |
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RefrigeratorFreezer |
Type |
Mode |
ON(˚C) |
OFF(˚C) |
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Temperature |
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High |
–20˚C |
–22˚C |
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F-Sensor |
Mid |
–16.5˚C |
–18.5˚C |
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Low |
–14˚C |
–16˚C |
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Type |
Mode |
ON(˚C) |
OFF(˚C) |
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High |
–0.5˚C |
–1.5˚C |
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R-Sensor |
Mid |
3.5˚C |
2.5˚C |
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Low |
6.5˚C |
5.5˚C |
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Defrost cycle |
Freezer:6 – 16hr/Refrigerator:12 – 32hr |
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Defrosting |
Rest time |
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10min±2min |
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First cycle |
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4hr±10min |
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Freezer-Sensor |
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502AT |
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Sensor |
Refrigerator-Sensor |
|
502AT |
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FRE EVAP-Sensor |
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502AT |
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REF EVAP-Sensor |
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502AT |
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Room TEMP-Sensor |
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502AT |
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parts |
Heater |
FRE Defrost-Heater |
200W (115V, 127V, 220V, 240V) |
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REF Defrost-Heater |
130W (115V, 127V, 220V, 240V) |
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Electrical |
Fuse |
Lamp-Heater |
2W (115V, 127V, 220V, 240V) |
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FRE Defrost-Fuse |
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250V 10A 72 ± 4˚C |
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REF Defrost-Fuse |
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250V 10A 72 ± 4˚C |
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VOLTAGE |
115V |
127V |
220V(626/628EV) |
220V(676/678EV) |
240V |
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CONDENSER |
STARTING |
125VAC/125 µF |
125VAC/125 µF |
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RUNNING |
250VAC/12 µF |
250VAC/12 µF |
350VAC/5 µF |
350VAC/5 µF |
350VAC/5 µF |
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OVER-LOAD |
MODEL |
4TM445SHBYY-53 |
4TM444NHBYY-53 |
4TM308PHBYY-53 |
4TM314RHBYY-53 |
4TM232SHBYY-53 |
|
ON TEMP. |
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|
690˚C |
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PROTECTOR |
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OFF TEMP. |
135˚C |
120˚C |
125˚C |
130˚C |
135˚C |
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STARTING- |
MODEL |
PTHAS-T100M200B |
PTHAS-T100M200B |
PTHAS-T220M350D |
PTHAS-T220M350D |
PTHAS-T330M385D |
|
RELAY |
RESISTANCE |
10Ω ± 20% |
22Ω ±20% |
33Ω ±20% |
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MOTOR-FAN |
FRE. REF. |
IS3208TMDA-4 |
IS3208TMDA-8 |
IS3208TMDA-2A |
IS3208TMDA-6 |
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CIRCUIT-MOTOR |
IS3208-SCF6A IS3208-SCO6A |
IS3208-SCF7A |
IS3208-SCL5A |
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|
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LAMP |
FRE. |
110V~130V/15W |
220V/15W |
240V/15W |
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REF. |
|
OSRAM DEULX S/E IIW |
|
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MOTOR-GEARED |
REF. |
M2BC18AR02 |
|
M2LC18AR02 |
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Samsung Electronics |
3 |
5. Function & Operating Instruction
• 5-1 Product Dimension
10
C
"X"
"Y"
40 |
|
D |
10 |
77 |
11 |
|
E |
B
A
8
673.5
10
64
820
MODEL |
A |
B |
C |
D |
E |
Remarks |
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SRG-L678EV |
1750.0 |
994.5 |
1509.7 |
755 |
667 |
"X" |
SRG-L676EV |
1750.0 |
994.5 |
1509.7 |
755 |
667 |
"Y" |
SR-L628EV |
1750.0 |
994.5 |
1459.7 |
715 |
627 |
"X" |
SR-L626EV |
1750.0 |
994.5 |
1459.7 |
715 |
627 |
"Y" |
6 |
Samsung Electronics |
5-2 Part Name & Disassembly
•Chilled Compartment disassembly
1.Pull it out by following the arrow.
• Top tray disassembly |
Take out food stuffs and |
Pull it forward. |
pull it out by following |
|
the arrow. |
2.Bend the cover and take it out.
• Tray disassembly
•
• 
•
•
• 
•
Pull it out by following the arrow.
• |
• |
Take out the water bottle with the bottom latch pressed.
• Ice compartment |
• Vegetable compartment |
• Freezing compartment |
Samsung Electronics |
7 |
9. Disassembly & Assembly
1. Replacement of refrigerator lamp
Warning
Always take out the power plug when replacing the refrigerator lamp. There is the danger of
electric shock.
1. Remove the cover with the back latch pressed.
2. Pull out the lamp.
3. After replacing the lamp, assemble the front latch of cover and then connect the back latch.
4. Plug in and check if power is cut off or not by pressing the R-door switch.
52 |
Samsung Electronics |
2. Replacement of freezer lamp
Warning
Always take out the power plug when replacing the refrigerator lamp. There is the danger of
electric shock.
1. Remove the cover by pressing the bottom latch.
2. Replace the lamp by turning it counter-clock wise.
3.Reassemble the cover in the reverse order of disassembly and plug in and the check if power is cut
off by pressing the door switch.
Samsung Electronics |
53 |
3. Disassembly of the cooling cycle in the refrigeration room
1.Take out food stuffs and trays from refrigeration room.
2.Bend the cover of chilled compartment and remove the left axis.
3.Move the holder of chilled compartment to the arrow and pull it out.
4.Remove 2 cap screws with (–) driver or similar tools.
5.Remove 2 latches from the bottom of the cover in the front of evaporator.
1
1
2
2 screws
54 |
Samsung Electronics |
6.Remove the evaporator cover by pulling out the bottom of the evaporator cover.
7.Remove the housing of wires from the center of the cooling cycle unit and remove the terminal from the geared motor.
8.Pull forward the insulating material of the cooling cycle unit and remove the wire terminal and insulating material.
9.Remove 2 screws securing refrigerator duct and pull it out by following the arrow.
Remove 2 screws |
Samsung Electronics |
55 |
10.Remove the wire terminal from the left top of refrigeration room
11.Remove 2 screws securing the back cover of cooling cycle unit and remove the left and right latches with
(–) driver.
latch |
Remove 2 screws |
56 |
Samsung Electronics |
■ Cooling cycle unit assembly in the refrigeration room
2 holders securing evaporator
Temp. sensor
EVAP
Absorber
sound(Noise protector)
TAPE-AL
(Groove for preventing small ice when defrosting)
■ Cooling cycle unit cover assembly in the refrigeration room
Noise protector
Frost spreading protection
Samsung Electronics |
57 |
■ Rotating duct assembly in the refrigeration room
Seal-air
Cover-duct, REF
Motor-Geared
Washer(Prevention noise)
Reed S/W
Blade-air
Seal-duct, RE (Prevention Temp. distribution)
58 |
Samsung Electronics |
4. Disassembly of the cooling cycle unit in the freezer
1. Take out the case from the freezer.
2. Remove 2 screws from the holder of the cooling cycle unit.
2 screws
3.Pull out the holder of the cooling cycle unit and disconnect wire terminals.
4.Remove the latch of the cooling cycle unit cover from the bottom.
5.Remove each terminal from the top of the left wire assembly.
Samsung Electronics |
59 |
6. Remove 2 screws from the back cover of the cooling cycle unit and remove the latch with (–) driver.
■ Assembly of the cooling cycle unit in the freezer
EVAP holder
Maintains 45˚ (Coolant & noise reduction)
EVAP
Temp. Fuse
Temp. Sensor
60 |
Samsung Electronics |
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