SAMSUNG Home Appliance Service SIDE-BY-SIDE REFRIGERATOR Model: RS2*3* RS2*2* RS2*1* SAM0096
WARNING IMPORTANT SAFETY NOTICE The service guide is for service men with adequate backgrounds of electrical, electronic, and mechanical experience. Any attempt to repair a major appliance may result in personal injury and property damage. The manufacturer or dealer cannot be responsible for the interpretation of this information. SAMSUNG ELECTRONICS AMERICA, INC. Technical Service Guide Copyright ⓒ2004 All rights reserved.
Contents 1. Safety instruction on services ······························ 4 2. Warranty information ···································9 3. Mechanical Disassembly ································14 4. Circuit Diagram ······································15 5. Operation Principles By Parts Of Circuit ························16 6.
1. Safety Instructions on Service ●Unplug the refrigerator before making any repair or any replacement. Avoid the electric shock. ●Use the rated components on the replacement. Check the correct model number, rated voltage, rated current, operating temperature and so on. ●On repair, be sure that the wires such as harness are bundled tightly and are not exposed by water. Bundle wires tightly in order not to be detached by the external force.
2. Warranty information SAMSUNG REFRIGERATOR LIMITED WARRANTY TO ORIGINAL PURCHASER This SAMSUNG brand product, as supplied and distributed by Samsung Electronics America, Inc.
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3. Mechanical Disassembly 3-1) Refrigerator Disassembly Control Panel Door Gasket 1. Insert a flat-blade screwdriver on the slot as shown, and unlock the tabs. 2. Disconnect the wire connector. The door gasket is a molded gasket set into a channel located in the door liner. 1. Open the door. 2. Grasp the gasket and pull in an outward motion until the molded gasket separates from the door liner. Door Handle The door handles allow access into the refrigerator and freezer.
Mechanical Disassembly Refrigerator Light The refrigerator light is located in the upper portion of refrigerator. 1. Pull the tip on the cover. Gallon Door Bin The door bins allow storage of perishable items. 1. Push the bin up and slide it out. Tempered Glass Shelf These shelves allow the storage of larger items and pull out for easy access. 1. Pull the shelf out as far as it goes. 2. Lift it up and remove it. Water Filter The water filter is located in the bottom left-hand corner of the refrigerator.
Mechanical Disassembly Damper in the Refrigerator 1. Pull out the screw cap and remove the screw. 2. Remove the lamp cover by unlocking the tabs and pulling the cover down. 3. Remove the screw at the cover damper. 4. Take off sensor and lamp wire connector located on the upper liner. 6. Remove the damper from the refrigerator. Refrigerator Thermistor The refrigerator thermistor is located inside of the upper light cover of the refrigerator. THERMISTOR Twin cool in the Refrigerator 1.
Mechanical Disassembly 3-2) Freezer Disassembly Door Bin in Freezer The door bins allow storage of perishable items. 1. Push the bin up and slide it out. Freezer Shelf The shelves slide out for easy access for frozen items. 1. Slide the shelf out until it reaches its stop. 2. Tilt down and slide it out of the compartment. Freezer Door Light Switch This switch is located in the left-hand portion of the freezer and sends a signal to the processor. 1.
Mechanical Disassembly top of the liner, and slide the ice maker in. 5. Tighten the screws (2) of the ice maker support. Ice Dispenser & Ice Maker The ice dispenser is located in the upper portion of the freezer. This assembly stores ice made by the icemaker and dispenses ice. 1. Lift the ice bucket up ① and slide out the ice dispenser assembly ②.
Mechanical Disassembly Freezer Light Evaporator Cover in Freezer The freezer light is located in the bottom of the auger motor case. The light is covered by an opaque cover. 1. Remove the screw and the light cover. 1. Remove screw (6). 2. Remove the assy cover multi fre. 3. Remove the assy cover supt motor fre. 4. Remove screw (2). 5. Remove the cover evap front. 6. Disconnect the sensor wire connector.
Mechanical Disassembly Evaporator in Freezer Evaporator is located in the bottom of freezer to produce cold air driven across the evaporator coils. 1. Take off the ductwork in Freezer. 2. Disconnect the wire connector (Heater, Bimental, and Thermistor). 3. Desolder the inlet and outlet tubes. 4. Remove the evaporator. 5. Take the same steps to seal the system as mentioned earlier. THERMISTOR Ice-MakerThermistor The Ice-Maker thermistor is located in its bottom.
Mechanical Disassembly 3-3) Machine Compartment Disassembly Machine Compartment ＆ Electric Box 1. Disconnect the power cord of the refrigerator. 2. Remove the fixed screws (6) of compressor cover. Condenser Fan The condenser Fan is located in the middle of machine compartment. It cools down the subcondenser and the compressor. 1. Lift up the rib under the support motor. 2. Pull the support motor. 3. Slide up and take off the compressor cover to see the machine compartment. 4.
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5. OPERATION PRINCIPLES BY PARTS OF CIRCUIT 5-1) POWER Terminal Oscillation Frequency ● Vcc(DC 5V) MICOM POWER AND SENSORS << BLDC BLDC MOTOR POWER(NOT USE) +12V(DC 12V) RELAY,PANEL POWER ● When turned on, rectified AC voltage which is stepped down on 2nd transformer flows between ① and ③ at about AC 15V, goes through the diode D101 and D104 is changed to DC, and provide constant 12V. It provides 5V to MICOM and other circuits via regulator REG102 (MC7805ACT), and make entire PCB operate.
OPERATION PRINCIPLES BY PARTS OF CIRCUIT 5-3) RESET CIRCUIT ● RESET Circuit allows the whole program to go back to the initial setting by initializing parts such as the RAM in MICOM with the power supply into MICOM or with an instant power failure. Upon the power supply, the reset terminal voltage becomes "LOW" for several tens of ㎲ compared to Vcc voltage(DC 5V) at MICOM, and it maintains "HIGH"(Vcc Voltage) during normal operation. But, when Vcc drops down to 3.4~3.
OPERATION PRINCIPLES BY PARTS OF CIRCUIT 5-5) DOOR SWITCH DETECTON CIRCUIT 1) If R-Door is opened, the contact point of the door switch (4-3) becomes open, and the current of PCB line comes through R404 and R405 and provides 5 volt which is recognized as door is opened, and turn off the fan at different load. When the door is closed, the voltage goes out from R404 to Switch, the MICOM is applied with OV and the door is recognized as closed.
OPERATION PRINCIPLES BY PARTS OF CIRCUIT 5-6) TEMP SENSING CIRCUIT 1) Sensor uses a thermistor which has a temp coefficient of negative resistance and controls resistance. When the heat goes up, the resistance gets down and vice versa. R302, 4, 6, 9 and C301~C303, C305 are parts for noise prevention but they are not related to temp sensing characteristics. 2) If Vf is the incoming voltage to MICOM in case of F-Sensor, Vf equals (Rth * Vcc)/ ((R301 + Rth).
OPERATION PRINCIPLES BY PARTS OF CIRCUIT Temp to Resistance of Sensor & MICOM PORT Voltage Sensor CHIP : PX41C Standard Temp. Resistance(㏀) Voltage(V) Temp. Resistance(㏀) Voltage(V) Temp. Resistance(㏀) Voltage(V) Temp. Resistance(㏀) Voltage(V) -50 °F/-45.6 °C 153319 -49 °F/-45.0 °C 144794 4.694 -48 °F/-44.4 °C 136798 -47°F/-43.9 °C 129294 4.659 -46 °F/-43.3 °C 122248 -45 °F/-42.8 °C 115631 4.622 -44 °F/-42.2 °C 109413 -43°F/-41.7 °C 103569 4.581 -42°F/-41.1 °C 98073 -41°F/-40.6 °C 92903 4.
OPERATION PRINCIPLES BY PARTS OF CIRCUIT 5-7) DAMPER CIRCUIT 1) The temperature of R-room is controlled by opening and closing of damper with stepping motor, supplying & blocking cold air. 2) TA7774P (IC07) operates the damper. TA7774P is the driver IC only for step motor. If the regular signal is provided to TA7774P from Micom, send combined signal to Quad-Polar step motor to rotate on certain direction. This makes clockwise or counter clockwise rotation to make the damper open or close.
OPERATION PRINCIPLES BY PARTS OF CIRCUIT 2) DISPLAY OPERATION Like the signal diagram below, Micom sends “ high ” signal through MICOM 6 terminals of NO #1→ 2 → 3 → 4 → 5 → 6 for 2ms every 12ms. This signal goes to output terminal via input terminal of IC5 (KID65783AP or TD62783AP). Output wave always goes through LED input terminal with DC11~12V on every period.
OPERATION PRINCIPLES BY PARTS OF CIRCUIT 5-9) Load Control Circuit 1) Main PCB processes most of the load control for electronic refrigerators. 2) Compressor, F-Room, defrost heater, and other functions are controlled with relay. 3) For example, to operate compressor, MICOM 29 pin outputs high (5V) signal which goes into IC3 Pin #4. The IC3 pin NO 4 plays the same role as the base of NPN TR. The pin #14 works as collector of TR.
OPERATION PRINCIPLES BY PARTS OF CIRCUIT 5-10) ICE MAKER OPERATION CIRCUIT 1) The ice maker circuit above is to control the ice maker kit installed on the F room. 2) This circuit is the hardware to control ejection and horizontal positioning, ice making temperature detection and full icing detection. Temperature detection circuit is the same as temperature detection circuit on 4-6 and the explanation will be skipped and only the ejection circuit will be explained.
OPERATION PRINCIPLES BY PARTS OF CIRCUIT 5-11) OPTION Circuit ● This circuit operates with the initial power on, uses DIODE (1N4148) or JUMPER WIRE. To modify option circuit, Power must be turned off before modification and turned on after the modification. Refer to the table below, the default factory values are highly recommended unless exceptional cases.
6. Illustrated Parts Catalog.
Illustrated Parts Catalog.
Illustrated Parts Catalog.
Illustrated Parts Catalog.
Illustrated Parts Catalog.
Appendix Ⅰ(Reference for circuit diagnostics) Ref.1) Measure Load Terminals Turn off Power, disassemble Housing connected to MAIN PCB CN70,71,72 and measure followings LOAD TERMINALS PCB CASE VALUE 1) DEFROST HEATER 2) ICE PIPE HEATER CN71 ⑪ & ③ DISPENSER HEATER CN72 ① & ③ WATER VALVE ICE MAKER WATER VALVE DISPENSER AUGER MOTOR CUBE SOLENOID CN70 ⑤ & CN71 ③ CN70 ⑦ & CN71 ③ CN70 ① & CN71 ③ CN70 ③ & CN71 ③ COMP.
Appendix Ⅰ(Reference for circuit diagnostics) Turn on Power and check status of Relay & Driving Circuit by checking followings according to load operation.
ELECTRONICS 272, Oseon-Dong, Kwangsan-Gu, Kwangju-City, Korea, 506-253 TEL : 82-62-950-6810, 6811 FAX : 82-62-950-6829 - This Service Manual is a property of Samsung Electronics Co., Ltd. Any unauthorized use of Manual can be punished under applicable International and/or domestic law. © Samsung Electronics Co., Ltd. Refrigerator Division 2004.
