REFRIGERATOR Model : SR-L677EV SR-L679EV SR-L627EV SR-L629EV GREEN REFRIGERATOR CONTENTS 1. Precautions 2. Product Specifications 3. Electrical Part Specifications & Standard 4. Circuit Diagram 5. Functions & Operating Instruction 6. Circuit Descriptions 7. Trouble shooting 8. Exploed View 9. Disassembly & Assembly 10. PCB Circuit Diagram SR-L677EV SR-L679EV SR-L627EV SR-L629EV 11. PCB Parts List 12.
1. Precautions Warning : Please abide by the following precautions in order to conduct the maintenance procedures in a safety fashion. Cleaning : After completing repairs, clean the surrounding area and the refrigerator and tell the consumer about the repairs being made. This appliance contains a small amount of the refrigerant isobutane(R600a), a natural gas with high environmental compatibility but which is also combustible.
2. Product Specifications Model SR-L629EV SR-L679EV SR-L627EV SR-677EV Type LMF 2 Door Freezer performance (4-STAR) Temperature control Electronic control Yes Water dispenser 501(17.69) 551(19.46) 506(17.87) 556(19.63) Total Net Capacity 143(5.05) Freezer 3 l/(ft ) 161(5.68) 358(12.64) 390(13.77) 363(12.82) 395(13.95) Total 526(18.57) 575(20.30) 531(18.75) 580(20.48) Freezer 3 168(5.93) Refrigerator 168(5.93) 185(6.
ITEM STANDARD Temperature Type Freezer F-Sensor Type Refrigerator F-Sensor Temperature Selection ON(˚C) OFF(˚C) –25˚C –23.5˚C –26.5˚C –19˚C –17.5˚C –20.5˚C –14˚C –12.5˚C –15.5˚C Temperature Selection ON(˚C) OFF(˚C) 1˚C 2.5˚C –0.5˚C 4˚C 5.5˚C 2.5˚C 7˚C 8.5˚C 5.
4. Circuit Diagram 4-1.
4-2. 230V-240V/50Hz, 60Hz, 220V/50Hz,60Hz, 127V/60Hz, 50Hz, 115V/50V,60Hz(INVERTER PCB) MAIN PCB CN10 CN30 F-ROOM SENSOR R-ROOM SENSOR DEFROST SENSOR.F DEFROST SENSOR.R BLK YEL BLK ORG BLK PRP BLK GRY RUNNING CAPACITOR BRN 3 PTC 5 S/BLU S F-DRAIN HEATER DEFROST HEATER.R R-DRAIN HEATER YEL CN50 BLK BRN CN71 REF ORG YEL PNK BLU PRP F-THERMAL FUSE R-THERMAL FUSE R/LAMP INVERTER FLUORESCENT LAMP R-ROOM FAN ORG R-LAMP HEATER BLU F-ROOM FAN PNK GRY WHT COMPRESSOR C 1 3 O.L.
5. Function & Operating Instruction 5-1. Product Dimension "X" "Y" MODEL A B C D E Remarks SR-L679EV SR-L677EV SR-L629EV SR-L627EV 1790 1790 1790 1790 1013.5 1013.5 1013.5 1013.
5-2. Part Name & Disassembly • Top tray disassembly Take out food stuffs and pull it out by following the arrow. Pull it forward. • Take out the water bottle with the bottom lever pressed. • • • • Tray disassembly • Pull it out by following the arrow.
5-3. Circulation of Refrigerant (H.
5-4.
5-5. Temperature Control and Other Capacity Explanation 1. Display design 2. Temperature control function 1) Temperature selection of freezer compartment ❈ After the initial key selection, it displays the notch which is presently set up, then within 5 seconds re-memorize the key after 1-2) points mentioned below. If there is no input of the key, it moves back to the previous temperature display. 1-1) From -14˚C ~ -25˚C, each one key is selected in 1˚C interval.
3) Quick freeze 3-1) Press the on/off buttons of Quick Freeze so that the lamp of Quick Freeze is light up and off and then it operates it’s function automatically. 3-2) It does not indicate from initial Power on. Change of light indication Initial Power On Off Pressed once time Quick Freeze On Pressed second time Remark Off a) When Quick Freeze is selected, LED indication will immediately change but actual operation operates after 10 seconds.
5) Sabbath function 5-1) It will turn to sabbath function if you press freezer and refrigerator temperatune button together for 5 seconds. 5-2) When turned to sabbath function, all of the front display of LED turn off. 5-3) The light will not switch on even when the door is opened, and if it was switched on then it will switch off. 5-4) To cancel the operation, you have to press freezer and refrigerator temperature button together again for 5 seconds. ❈ This function is used only in special area. 3.
5. Test function ❈ Test function is for the test of PCB, product, official inspection and ability of SVC. ❈ When s/w test is chosen and tested the product, you switch off and on again then let it run a self-test. 1) Function of forced running. 1-1) If you choose PCB button once, COMP will automatically start. 1-2) When forced running is chosen, freezer will show “FF” and “1” in refrigerator automatically.
❈ Exhibition mode 1. When you press quick freeze button and freezer temp. button together the operation changes into exhibition mode. 2. In exhibition mode, compressor is immediately off and defrost do not activate. 3. If you press quick freeze button and freezer temp. button together for 5 sec exhibition mode cancel out and bact to nomal operation. 8. Self-test function 1) Define of the fault temperature sensor : temperature of the sensor is over between -50˚C (4.5volt) ~ +50˚C(0.
Table 1. Display table of self diagnosis.
2) At this moment if you take off quick freeze and quick cool button and press refrigerator temp. button (ding-dong sound), it change into the display of the presently operating parts. 3) This display condition is unrelated to actual operation and it is an reference of indication that MICOM commanded operating order). Table 2. Display table of the presently operating parts. No Content 1 2 3 4 5 6 7 8 9 10 11 12 R-fan R-defrost heater Initial start mode Over load mode Low temp.
3) Door open when door is open, the related display shows an actual temperature. 3-1) Display range of freezer is -35˚C ~ 30˚C and refrigerator is -9˚C~9˚C. 3-2) If freezer inner temperature is above 0˚C for 10 minute, the display of the selected temp. will blink. 3-3) If refrigerator inner temperature is above 15˚C for 10 minute, the display of the selected temp. will blink. 3-4) When door is open, 1˚C will increase after delay time from the display before door opens.
6. Circuit Descriptions 6-1. Power circuit Circuit used Voltage (DC 12V) Relay Operation & LED Display Vcc (DC 5V) Power around MICOM & Sensor Detector 1) The input AC voltage of DC-trans secondary registers 8V at CN10 between ①~③. The rectified voltage passed through D101 ~ 104 becomes DC 5V through voltage regulator MC7805(REG1). The power(DC5V) is supplied to the power around micom and sensor detector. 2) The input AC Voltage of DC-trans secondary registers 15V at CN10 between ⑤~⑦.
6-2. Oscillator Port Oscillating Frequency Xin(#19) 4.00MHz Xout(#20) 4.00MHz It is designed for clock generation and time calculation for synchronizing transmission and reception on the logic elements inside the MICOM. If the X-TAL specification changes, MICOM may make an error. (The standard components should be used.) ±0.5% Error 6-3.
DOOR Door Conditions Door S/W Contact MICOM PIN NO Micom Input Voltage “HIGH” CLOSE OPEN OPEN CLOSE “LOW” CLOSE OPEN “HIGH” OPEN CLOSE F # 39 R # 40 “LOW” 1) If door is open, door S/W contact is closed. Then MICOM receives “low” signal and detects door open then, Relay control circuit receives “HIGH” signal and turn Lamp on. 2) If door is closed, door S/W contact is open.
6-6. Button scan and display circuitry At that time, the peak to peak voltage of square signal registers around 12V. The grid #1 ~#5 waveforms are as follows.
6-7. Load Operation If MICOM outputs “high” signal to driver-IC(KID65003AP/S1P2655AØ3) according to each load operation conditions, IC turns on and DC 12V flows to ground through the relevant relay coil. Then, core is magnetized by the coil current, and relay contact switches on. When relay contact is on, AC POWER is supplied to the relevant operation load, then which will be activated. If MICOM outputs “low” signal, load operation stops with the relevant relay contact off.
6-8. Other option functions Temperature and function values are changeable by using main PCB switching diode. • Note : If possible, do not change because the values have been set in factory. When changing option functions, power should be turned off. (Only initial power-on allows reading option function) 6-9. Option Table NOTE If possible, do not change because the values have been set in factory. When changing option funcfions, power should be turned off.
7. Trouble shooting Precautions 1. Is the power cord well connected to wall outlet? 2. Refer to the reference 1) No power Start DC-Trans primary power input? N Check wires Y DC-Trans secondary power input? Y DC 12V output from REG102? N Replace DC-Trans N Check REG102 (MC7812) Y DC 5V output from REG1? N Check REG1 (KA7805) Y Are wires connected to panel securely? N Check wire connection Y Reference 1 (Page.
2) Problem with self-test 2-1) Problem with outside temperature sensor 2-2) Problem with refrigerator temperature sensor 26
2-3) Problem in refrigerator defrost sensor 2-4) Problem in freezer temperature sensor 27
2-5) Problem in freezer defrost sensor 28
3) Compressor does not run Reference 1. Compressor does not operate in 5 minutes after compressor OFF. 2. Compressor does not run during defrosting. 3. Compressor does not run because low temperature is detected if freezer and refrigerator sensor is not connected.
4) When cooling fan do not activate Reference Check cooling fan when defrost activation is selected. 1. When COMP is OFF both freezer and refrigerator cooling fan plus COMP cooling fan remain OFF. 2 . When COMP is ON, refrigerator fan is not always ON and when refrigerator temperature reached to a set-up temperature fan goes OFF. 3. When both freezer and refrigerator door close from open each fan takes delay time (5sec~ 1 min) and running.
4-2) When refrigerator fan (R-fan) do not activate 31
4-3) When COMP cooling fan do not activate 32
5) No defrosting Reference 1. Even though both F·R-defrost sensors short-circuit, normal operation continues without defrosting.(Refer to self-diagnosis function) 2. Even though the temperature fuse is off, there is no heating but defrosting natural temperature increase comp off-time takes longer. 3. Even though both F·R-defrost sensor are open, heating does not end and comp-off maintains with temperature fuse short-circuited.
6) When alarm run continuously Reference 1. Alarm runs after 2 minute when door is open (melody) and runs in interval in every 2 minutes. 2. If door close is not done properly, MICOM will indicate that the door is open then alarm rings. If it recognize door open over 10 minutes it switch OFF inner lamp goes OFF. Lamp will not go ON in this situation even if door opens.
6-2) If Beep sounds continuously 6-3) When original panel PCB do not activate 36
6-4) When buttons of panel PCB is not selected 37
Reference 1. Is the power cord well connected to wall outlet? 2. Be careful of high-voltage discharge because high voltage DC power is supplied to SUB-PCB.
8. Reference Reference1 The connection of DOOR-CABI Reference2 Inspection of Relay * First separate the housing connected to the main PCB CN70, 71 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.
Reference3 Check for malfunctioning of the subordinate * Cut off the power code, separate the housing from the main PCB CN70,71 and measure the following. 1. Measure resistance between the terminals and check for malfunctioning of L/W.
Reference5 Checking the Door S/W (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. (Micom signal) 1. Check if CN30 ⑥ and ⑧ is 5V DC after closing the F·R doors. 2. Check if CN30 ⑥ is 0V DC when opening F door. 2. Check if CN30 ⑧ is 0V DC when opening R door. 3.
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.
9. Exploed View 9-1.
OPTION NO CODE-NO PART NAME 1 2 3 DA67-40203N DA67-40182A DA63-00946A DA63-00946B DA63-00947A DA63-00947B DA63-00948A DA63-00948B DA66-10104A DA71-20145A DA63-00904A DA63-00922A DA97-00181A DA97-00192C DA97-00192D DA97-00192E DA97-00192F DA47-00095E DA32-00006C DA97-00122A DA97-00122B DA97-00122C DA97-00122D DA61-70114B DA61-70115C DA63-40006A DA63-00924A DA63-00923A DA47-40112N DA31-10105A 4713-000213 4713-001035 DA63-00941A DA97-00390A DA97-00390B DA97-00390C DA63-00903A DA61-00081A DA31-00019A DA31-
9-2.
OPTION NO CODE-NO PART NAME 1 DA97-00104A DA97-00184A DA67-10225A DA67-10229A DA63-10359B DA66-10104A DA71-20145A DA68-50153H DA63-00936A DA63-00936B DA64-00449A DA64-00448A DA67-00505D DA67-00505E DA67-00550A DA67-00550B DA67-00550C DA67-00550D DA64-00450A DA64-00451A DA67-00505B DA67-00505C DA61-00368A DA61-00367A DA61-00370A DA61-00369A DA67-40194A DA97-00296A DA63-00945B DA63-00925A 4713-001147 4713-001145 4713-000175 DA59-00243A DA96-00017A DA96-00017B DA96-00017C DA32-10105G DA47-00095D DA97-0049
NO CODE-NO 29 30 31 DA64-00452A DA60-00033A DA31-00003L DA31-00003P DA31-00003N DA63-00771A DA32-10109H DA62-00106A DA62-00109A DA70-00402A DA97-00441A DA97-00441B DA97-00441C 32 33 34 35 36 OPTION PART NAME TRIM-COVER SENSOR SPACER-DUCT MOTOR-FAN MOTOR-FAN MOTOR-FAN GROMMET-MOTOR SENSOR ASSY SEAL-COVER EVAP RE SEAL AIR SIDE PLATE-DRAIN REF ASSY PLATE-DRAIN REF ASSY PLATE-DRAIN REF ASSY PLATE-DRAIN REF ASSY 47 SR-L627 SR-L629 SR-L677 SR-L679 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
9-3.
NO CODE-NO 1 DA91-01467A DA91-01467B DA91-01467C DA91-01467D DA91-01467E DA91-01467F DA91-01467G DA91-01467H DA91-01466A DA91-01466B DA91-01466C DA91-01466D DA91-01466E DA91-01466F DA91-01466G DA91-01466H DA64-00166A DA71-40135A DA71-40183C DA91-01468A DA91-01468B DA91-01468C DA91-01468D DA91-01468E DA91-01468F DA91-01468G DA91-01468H DA63-01052A DA63-00926B DA63-00927A DA63-00929A DA63-00928A DA63-00930A DA63-00931A DA66-00058A DA61-00365A DA61-00378A DA61-00361A DA63-50145A DA67-00546A DA67-00546B DA67
NO CODE-NO 23 DA63-01046A DA63-01046B DA63-01046C DA63-01046D DA64-00444A DA64-00444B DA64-00445A DA64-00445B DA63-00915A DA63-00916A DA41-00102A DA63-00942A DA63-00352A DA63-00352B DA63-00352C DA63-00909A DA63-00909B DA63-00909C DA63-00909D DA64-00444A DA64-00444B DA64-00445A DA64-00445B DA63-00915A DA63-00916A DA41-00102A DA97-00193A DA97-00193B DA97-00193C DA97-00193D DA63-00906B DA63-00906C DA63-00906D DA63-00906E DA63-00905B DA63-00905C DA63-00905D DA63-00905E DA97-00216A DA67-30216A DA63-00902A DA6
9-4.
NO CODE-NO 1 2 3 4 5 6 7 DA60-90124A DA61-40101C DA61-00178A DA61-10145D DA64-20138B DA63-50146A DA63-10262F DA63-10262A DA63-10262B DA63-10262N DA34-00024A DA34-00122D DA67-10508A DA26-30111H DA26-30111C DA26-30111F 2501-001185 2501-001186 2501-001045 2501-001187 DA63-10212J DA63-10212B DA63-10212E DA63-10212M DA41-00099A DA41-00099B DA41-20148A DA63-00951A DA63-00951B DA62-20001Q DA63-10564H DA31-00010B DA31-10110H DA31-10110F DA31-10110L DA31-10110G DA73-10109A DA63-40171B DA97-00180A DA97-00180B DA97
10. Disassembly & Assembly 10-1. 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. 10-2.
10-3. 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.
10-4. Disassembly of the cooling cycle in the refrigeration room 1. Take out food stuffs and trays from refrigeration room. 2. Remove 4 cap screws with (–) driver or similar tools. 3. Remove 6 screws from the cover-evap. ref. assy 4. Remove 2 latches from the bottom of the cover in the front of evaporator. 5. Remove the evaporator cover by pulling out the bottom of the evaporator cover.
6. Remove the housing of wires.
■Cooling cycle unit assembly in the refrigeration compartment ■Dust assembly in the refrigeration compartment 57
10-5. Disassembly of the cooling cycle unit in the freezer 1. Take out the case from the freezer. 2. Remove 2 screws from the assy-supt free. 2 screws 3. Pull out the holder of the assy-supt free and disconnect wire terminals. ① ② 4. Remove the latch of the cover-evap fr. from the buttom. ② ③ ① 5. Remove each terminal from the top of the left wire assembly.
6. Remove 2 screws from the back cover of the cooling cycle unit and remove the latch with (–) driver.
10-6. Assembly of mechanic compartment in the refrigerator 1. Remove the screws securing the mechanic compartment cover of the back bottom of the refrigerator. 2.
10-7. Electric box assembly Warning Make sure the power plug is taken out when replacing the components for the main PCB. 1. Disconnect the power cord. 2. Remove the cover of electrical box with (–) driver. 3.
10-8. Temperature controller disassembly 1. With dispenser model. 1-2) Pull out the assembly press lever. 1-1) Press the fixing lever, lift the exclusive water tank upwards, then remove it. 1-3) Push the latch of control panel assembly with (-) driver and pull out the control panel 2. Without dispenser model 2-1) Remove 3 screws from the assembly control panel and pull out the assembly control panel.
11.
12. Specifications of main components 12-1 Regulator 3-TERMINAL 1A POSITIVE VOLTAGE REGULATORS The MC78XX/MC78XXA series of three-terminal positive regulators are available in the TO-220 package and with several fixed output voltages, making it useful in a wide range of applications. These regulators can provide local onward regulation, eliminating the distribution problems associated with single point regulation.
REGULATOR(MC7812C) ELECTRICAL CHARACTERISTICS MC7812 (Refer to test circuit, Tmin < Ti < Tmax, Vi = 500mA, Vi = 19V, Ci = 0.33㎌, Co = 1.0㎌ unless otherwise specified) MC7805C Characteristic Symbol Test Conditions Typ Max 11.5 12 12.5 11.4 12 12.6 Vi = 14.5V to 30V 10 240 Vi = 16V to 22V 3.0 120 Io = 5.0mA to 1.5V 12 240 Io = 250mA to 750mA 4.0 120 5.1 8 Ti = 25℃ Output Voltage Unit Min 5.0mA≤Io≤1.0A, Po≤15W Vo Vin = 14.5V to 27V V Vi = 15.
© Samsung Electronics Co., Ltd. November 2001 Printed in Korea Code-No : DA68-01130A REV(0.
