Samsung RT40MA Service Manual Download

Page: 38 / 47

8-2 Diagnosing the main components

Components

Compressor

• Use the tester to measure

the resistance.

– Bring the component to cool down

completely before measuring.

P.T.C Relay

Condenser

Overload

protector

Fan-motor

Door switch

Defrost heater

Diagnosing methods and criteria

Location

Measuring point

Primary iwre

Secondary wire

Normal

Approx 10 ~ 500k

Ω

3 ~ 20

Ω

Abnormal

Ω

and

∞Ω

• Use the tester to measure

the resistance.

– Bring the component to cool down

completely before measuring.

Normal

Approx

∞Ω

~ k

Ω

Abnormal

Ω

and

∞Ω

Normal

Approx 10

Ω

~ 80k

Ω

Abnormal

Ω

and

∞Ω

Normal

Ω

Abnormal

∞Ω

Normal

Approx 100

Ω

~ 20k

Ω

Abnormal

Ω

and

∞Ω

• Use the tester to measure

the resistance.

– Bring the component to cool down

completely before measuring.

• Use the tester to measure

the resistance.

– Bring the component to cool down

completely before measuring.

• Use the tester to measure

the resistance.

• Use the tester to measure

the resistance.

Measuring point

A B contact point

When the switch is

on by the contact

and

∞Ω

Normal

Approx200M

Ω

Abnormal

∞

Ω

• Use the tester to measure

the resistance.

– Bring the component to cool down

completely before measuring.

Mechanical

compartment

Mechanical

compartment

Electrical

equipment box

Mechanical

compartment

Mechanical

compartment

Freezing

compartment

Between the

upper and the

lower doors

EVAP

Normal

Ω

~200

Ω

Abnormal

∞

Ω

∞Ω

C.
No.
Nc.

( Seperating measure)

Summary of Contents for RT40MA

Page 1: ...ifications of Electric Components 4 Electric Circuit Diagram 5 External Size and Designations 6 Refrigeration Cycle and Cool Air Circulation 7 Circuit Operation Theory 8 Troubleshooting 9 Exploded View and Part List 10 Disassembly of Freezing Compartment 11 Disassembly of Refrigerating Compartment ...

Page 2: ...V 60Hz 127V 60Hz 220V 5 60Hz 230 240V 50 290W 310W forced convection HFC 134a 150g 4 STAR 369 13 1 670x640x1660 670 670x640x1730 670 59 69 kg 63 73 kg Vailable Capacity cu ft Net Dimension WidthxDepthxHeight Rated Voltage frequency Rated Power Defrost Heater Type of Refrigerator Refrigerant Refrigerant Mass Freezing Capicity Weight Net Gross CFC FREE ...

Page 3: ...o fire hazard or abnormal operation causing severe personal injury Make sure the power cord is not crushed or damaged Repair immediately all power cords or outlets that have become frayed or otherwise damaged Check the operating environment Do not install the refrigerator in a humid with condensation location or on an unstable surface Be sure the earth If earthing is not done it will cause breakdo...

Page 4: ... the correct model rated voltage rated correct operating temperature and so on On repair make sure that the wires such as harness should be bundled tightly Bundle tightly wires in order not to be detached by the external force and then not to be wet On repair remove completely dust or other things of housing parts harness parts and check parts Cleaning may prevent the possible fire by tracking or ...

Page 5: ...de Storage Angle Adjustment Movable Caster Interior Lamp Liner Door Panel RT40MA MB RT44MA MB 87 87 260 282 347 12 3 369 13 1 670 640 670 1730 1660 59 63 R134a 150g Dial Resistance Automatic Start Finish by PCB Cyclo Pentane Cyclo Pentane ABS SD 0150 2 Guard Freezer 1 Guard Egg 1 Guard Bottle 2 Guard Variety 1 Guard Jumbo Refrigerator Freezer 2 Rear 2 Legs front 2 Door Freezer Refrigerator AC110 1...

Page 6: ... C R 110 115V 60Hz UK162C L1U T3 127V 60Hz UK162P L1U T3 220V 50 60Hz SK182H L2U E02 FREOL α 15c 200cc Fin type Natural convection type Molecular sieve XH 9 13g ID 0 75 x L3400 mm PFN 174S 05F ON 5 5 C 1 5 C OFF 3 0 C 1 5 C 250V 0 5A 125V 1 5A BSBN Brass screw Rating Voltage Ampere Open temperature Rating Voltage Ampere Open temperature TMDE714F1 AC 250V 5A ON 5 3 C OFF 12 3 C AC 250V 10A 77 10 C ...

Page 7: ...ance Close temp Open temp Running Refrigeration Cycle Electrical R S C R 220V 50Hz 230 240V 50Hz MK172QL1U E01 FREOL α 15c 200cc Fin type Natural convection type Molecular sieve XH 9 13g ID 0 75 x L3400 mm 502AT Rating Voltage Ampere Open temperature Rating Voltage Ampere Open temperature DC 5V ON 5 C 3 C OFF 15 C AC 250V 10A 77 C 10 C J531Q35E330M385 2 33Ω 2PIN 69 9 C 135 5 C 350VAC 5 0µF 4TM232S...

Page 8: ...EFROST HEATER FAN MOTOR PINK 3 1 2 WHT R LAMP GRY DOOR SWITCH RED RED N L N E L E M S C COMPRESSOR B 2 A 2 A 1 GRY F LAMP L L WHT BLK M RED OVERLOAD PROTECTOR 3 6 YEL YEL WHT WHT GRY GRY BRN BRN RED WHT GRY BRN CN02 CN01 A 1 B 1 WITHOUT EARTH A 2 B 2 WITH EARTH C WITH F LAMP GRY GRAY RED RED BRN BROWN YEL YELLOW WHT BLK WHITE BLACK PINK PINK WHT WHITE SK BLU SKY BLUE E EARTH C 220V 50Hz 230 240V 5...

Page 9: ... W BLK RED RED RED RED PNK S BLU S BLU S BLU PNK 2 3 5 M S C RED GRY GRAY RED RED BRN BROWN YEL YELLOW S BLU SKY BLUE PNK PINK BLK BLACK WHT WHITE W BLK WHITE BLACK 6 FAN MOTOR COMP COOLING MOTOR DOOR S W F M S BLU C M RED A 1 A 2 B 2 A 1 B 1 WITHOUT EARTH A 2 B 2 WITH EARTH B 1 L RED L C H WHT PNK THERMAL FUSE DEFROST HEATER 1 3 4 2 110 115V 60Hz 127V 60Hz 220V 50 60Hz RT40 44 ...

Page 10: ... 5 1 Product Dimension 670 60 9 B A 548 5 50 15 C D 80 5 1250 5 454 1 MODEL RT40MA MB RT44MA MB A 1660 1730 B 1103 5 1173 5 C 549 5 549 5 D 640 670 640 670 Remark BAR TYPE 5 Extemal size and Designations ...

Page 11: ...e cover push the cover to the right as shown until the mounting hook disengages then disengage the other mounting hook and pull out the cover Pull the shelf forward until it stops then lift it up and pull it out With shelf front raised slightly engage the roller between the rails and slide it back To repace the cover first engage the mounting hook as shown then engage the other hook and push in To...

Page 12: ... 6 Schematic diagram of coolant gas circulation COMPRESSOR PIPE IMMERGE PIPE SUB CONDENSER PIPE CLUSTER PIPE HOT DRYER CAPILLARY TUBE EVAPORATOR ACCUMULATOR PIPE SUCTION COMPRESSOR 6 1 Refrigeration Cycle ...

Page 13: ...compartment by cold air shower Cold air that comes out of the freezing compartment is absorbed back to the lower part of the cooling system through the suction port on the median divider In the refrigerating compartment cold air is distributed to the duct cover through the median divider Cold air supplied to the duct cover passes through the refrigerating compartment After cooling the refrigeratin...

Page 14: ...g recess time 3 The first defrosting function after the initial power on starts with 4 hours of accumulated time of comp on and then it repeats its function at every 8th hour of comp on 4 In the process controlling of defrosting heater ON OFF is done by EVA SENSOR When the quality of EVA SENSOR is poor short open defrosting will be terminated only after recess time function without heating 5 In th...

Page 15: ...d out according to the temperature selection knob position l To release it s operation during forced starting power should be turned off and turned on again or test release mode on 3 below should be selected 2 Forced Defrosting Function l If test switch is pressed once more during forced starting function it is released immediately and forced defrosting function starts and the Lamp on main PCB sho...

Page 16: ... of Lamp Indicating Defects Lamp On Time 0 3sec Lamp Off Time 2sec If there are more than one defect corresponding display is shown in sequence Example of Defect Indication When R Room Sensor is defected LAMP repeats one time of 0 3 second on and then 2 seconds off When R Room Sensor and EXT Sensor are defected at the same time LAMP repeats one time of 0 3 second on 2 seconds off and then 3 times ...

Page 17: ...around AC 16V to the both sides of the a point Then DC 12V and 5V are supplied through the circuit and regular voltage IC REG1 REG2 It oscillates generate clock for synchronizing the information transmission and reception of the internal elements of MICOM and to calculate the time If the specification of resonator is changed it is not able to operate normally because the trimming system of MICOM i...

Page 18: ...EC and it maintains high during the normal operation If door is open R DOOR S W contact is closed Then when RED LINE supplies power to GRAY LINE passing through R704 and PHOTO COUPLER PC817 LED and D702 PC817 operates and generates 50 or 60HZ globe shaped wave MICOM recognizes this waveform and detects that door is open If door is closed R DOOR S W contact is open and power is not supplied to PC81...

Page 19: ... when the temperature is high and it gets bigger when the temperature is low 2 The voltage which is input to MICOM by a sensor is calculated with Vf Rth Vcc R303 Rth Vcc DV5V Rth Sensor resistance 3 Refer to the attached conversion table of resistance and input voltage of sensor for temperature ...

Page 20: ...stance values of MAIN PCB MICOM input unit for ROTARY S W contact position of SUB PCB ASS Y are like below In case of resistance value estimation connector terminal should be estimated after the connector of MAIN PCB CN01 is disassembled On the above Table resistance value is not calculated when SUB PCB ASS Y connecting line is disconnected or there are any cracks on PCB board Class Voltage R502 e...

Page 21: ...er is turned on the micom pin 23 outputs high DC 5V and a realy is activated When the defrosting heater is turned off the micom pin 23 outputs low 0V c Indicating Lamp is turned ON when MICOM PIN 22 input voltage is high and DC12V is passed to LED through resistance R703 When MICOM PIN 22 output is low LED is turned OFF 7 Load Operation and Indicating Lamp Controlling Parts ...

Page 22: ...18 D619 D620 MICOM OUTPUT1 INPUT1 INPUT2 INPUT3 INPUT4 OUTPUT2 OUTPUT3 OUTPUT4 OUTPUT5 0 5 1 0 1 5 2 0 2 5 3 0 3 5 4 0 4 5 5 0 5 5 6 0 6 5 7 0 7 5 0 5 1 0 1 5 2 0 2 5 3 0 3 5 4 0 4 5 5 0 5 5 6 0 6 5 7 0 7 5 8 0 605 604 603 602 601 605 604 603 602 601 SHIFT SHIFT Warning As DIODE OPTION except D601 D605 has important effects on the reliability of refrigerator do not change it voluntarily ...

Page 23: ...e controller OK Voltages and Resistance values of each ROTARY S W on CN01 of MAIN PCB OK Is the resistance value of refrigerator sensor OK see separate temperature Table Control temperature controller see temperature controller circuit Repair MAIN PCB ASS Y and other COMP connection unit NO Replace temperature controller NO Repair connector part and wires NO Replace refrigerator sensor NO YES YES ...

Page 24: ... of MAIN PCB discharged Is FUSE of MAIN PCB OK Is soldering and SHORT on the soldered area of MAIN PCB OK Is COMP RELAY and defrosting RELAY OK when the TEST S W of MAIN PCB is operated Repair Power Cord and wires MAIN PCB ASS Y is OK NO Replace Fuse NO Check soldering NO Check PCB NO YES YES YES YES ...

Page 25: ...24 4 Circuit ...

Page 26: ...B 3 VSB 5 VSB 6 VSB 9 VSB 12 VSB 14 VSB 18 VSB 24 VSB 36 VSB 48 VSB 60 VSB 100 VSB 3S VSB 5S VSB 6S VSB 9S VSB 12S VSB 14S VSB 18S VSB 24S VSB 36S VSB 48S VSB 60S VSB 100S 3 5 6 9 12 14 18 24 36 48 60 100 3 5 6 9 12 14 18 24 36 48 60 100 36 50 115 200 280 460 820 1 850 3 300 5 100 13 400 17 47 68 155 270 370 610 1 100 2 450 4 400 6 800 18 860 2 1 3 5 3 5 6 3 8 4 9 8 12 6 16 8 25 2 33 6 42 0 70 0 2...

Page 27: ...W StandardType 0 35to0 37W HighsensitiveType 0 26W PleaseseeCoilDataChart PleaseseeCharacteristicData STRUCTURE 16 Amps Miniature Slim Type Power Relay Stationary Contact Terminal Make Stationary Contact Spring Make Stationary Contact Spring Break Armature Yoke Core Movable Contact Spring Card Base Block Stationary Contact Terminal Break Coil Terminal Bobbin Coil Movable Contact Terminal GENERAL I...

Page 28: ...ime Ⅰ Output Current at on time Ⅱ VDET VOL ILKG VHYS VDET T ICCL ICCH VTH OPR tDL tDM tOL Ⅰ tOL Ⅱ 3 15 30 0 6 10 8 3 3 50 0 1 300 30 0 8 10 15 18 16 3 45 0 25 0 1 100 500 50 1 0 15 20 28 30 V V mV V mA mA RL 200Ω VOL 0 4V RL 200Ω VCC 15V RL 200Ω RL 200Ω VCC VDET MIN 0 05V VCC 5 25V RL 200Ω VOL 0 4V RL 1 0 CL 100pF RL 1 0 CL 100pF VCC VDET MIN 0 05V TC 25 VCC VDET MIN 0 05V TC 30 75 Symbol Test Con...

Page 29: ... on and instantane ous power off in systems n FEATURES Detecting against error operations at the power ON OFF Resetting function for the low voltage microprocessor Checking low battery ORDERING INFORMATION BLOCK DIAGRAM Vcc INPUT GND VREF VO TO 92 1 Input 2 GND 3 Output Device Package Operating Temperature KA7533Z TO 92 30 75 ...

Page 30: ... 30V IO 5mA f 10Hz to 100KHz TA 25 f 120Hz VI 15V to 25V IO 1A TJ 25 f 1KHz VI 35V TA 25 TJ 25 TJ 25 TJ 25 VI 14 5 to 30V VI 16 to 22V IO 5mA to 1 5A IO 250mA to 750mA Characteristic Symbol Test Conditions KA7812I KA7812I Unit Output Voltage Line Regulation Load Regulation Quiescent Current Quiescent Current Change Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout Voltage Output R...

Page 31: ...ting effects must be taken into account separately Pulse testing with low duty is used ABSOLUTE MAXIMUM RATINGS TA 25 unless otherwise specified VI VI ReJC ReJA TOPR TSTG V V W W 35 40 5 65 0 125 40 125 65 150 Characteristic Symbol Value Unit Input Voltage for VO 5V to 18V for VO 24V Thermal Resistance Junction Cases Thermal Resistance Junction Air Operating Junction Temperature Range KA78XX A KA7...

Page 32: ...put current Although designed primarily as fixed voltage regulators these devices can be used with external components to obtain adjustable voltages and currents FEATURES Out put Current up to 1A Output Voltages of 5 6 8 9 10 11 12 15 18 24V None Thermal Overload Protection Short Circuit Protection Output Transistor SOA Protection BLOCK DIAGRAM REGULATOR ORDERING INFORMATION 1 INPUT OUTPUT 3 GND 2...

Page 33: ...4 23 22 21 20 19 18 17 16 68 648 65 011 61 595 58 384 55 366 52 526 49 854 47 337 44 967 42 733 40 626 38 640 36 765 34 995 33 323 31 743 30 250 28 838 27 502 26 237 4 364 4 333 4 301 4 268 4 235 4 2 4 164 4 127 4 09 4 051 4 012 3 972 3 93 3 888 3 845 3 802 3 757 3 712 3 666 3 62 Temperature Resistance Voltage v 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 12 949 12 424 11 924 11 44...

Page 34: ... 3 525 3 477 3 428 3 397 3 329 3 279 3 229 3 178 3 127 3 076 3 025 2 974 2 923 2 872 Temperature Resistance Voltage v 20 21 22 23 24 25 26 27 28 29 30 31 32 33 5 970 5 759 5 557 5 363 5 178 5 000 4 829 4 665 4 508 4 357 4 212 4 072 3 938 3 810 1 869 1 827 1 786 1 745 1 705 1 666 1 628 1 590 1 553 1 517 1 481 1 446 1 412 1 379 Temperature Resistance Voltage v ...

Page 35: ...A KA2655 0 5 VINTO 0 5 VO 0 5 VINTO 0 5 VO VIN open VO GND VR 50V Ta 25 VIN open VO GND VR 50V Ta 25 IF 350mA 1000 15 0 25 0 25 1 7 30 1 0 1 0 50 100 2 0 Characteristic Symbol Test DC Current Gain Input Capacitance Propagation Delay Time Clamp Diode Leakage Current Clamp Diode Forward Voltage 1 2 3 4 5 6 7 8 16 PIN CONFIGURATION 15 14 13 12 11 10 9 SCHEMATIC DIAGRAMS KA2655 each driver 7 2K 3K COM...

Page 36: ...OR DEFROST HEATER THERMAL FUSE SK BLUE PINK 2 3 1 1 2 2 5 3 6 C B 1 3 GRY R LAMP DOOR SWITCH GRY BRN SK BLUE SUB PCB R ROOM SENSOR EVAP SENSOR MAIN PCB WHT WHT EXT SENSOR L L M RUNNING CAPACITOR OVERLOAD PROTECTOR P T C RELAY 5 9 7 NO CODE NO ITEM DESCRIPTION Q ty DA32 10105P DA32 10109J DA41 00010A DA41 00010B DA41 00010C DA41 00010D DA41 00012A DA32 10109M EVA SENSOR ASS Y R SENSOR ASS Y MAIN PC...

Page 37: ...36 8 1 Trouble check for the cooling cycle 8 Troubleshooting ...

Page 38: ...ormal Approx 100Ω 20kΩ Abnormal 0Ω and Ω Use the tester to measure the resistance Bring the component to cool down completely before measuring Use the tester to measure the resistance Bring the component to cool down completely before measuring Use the tester to measure the resistance Use the tester to measure the resistance Measuring point A B contact point When the switch is on by the contact an...

Page 39: ...CE CASE TRAY ICE ASSY CAP SCREW COVER EVAP FRONT KNOB TEMP CONTROL FRE WASHER THERMO BIMETAL EVAP ASSY EVAP SPACER EVAP L SPRING FAN INS EVAP REAR FAN PROPELLER MOTOR FAN GROMMET MOTOR CASE MOTOR COVER MOTOR GROMMET MOTOR ASSY COVER EVAP SUPPORT MOTOR LEVER AIR CONTROL TRIM SHELF TRAY ICE SPACER EVAP R DEFROST SENSOR EVAP ASSY EVAP SPACER EVAP L SPACER EVAP R SEMI ELECTRIC TYPE MECHANICAL TYPE ...

Page 40: ...REAR GUIDE AIR THERMO STAT R COVER PURIFIER CATALYST LTC CASE CHILLDE ROOM TRIM SHELF SHELF WIRE REF SHELF WIRE REF ASSY SHELF REF GROMMET RAIL GROMMET RAIL GROMMET RAIL SHELF REF ASSY TRIM SHELF REF RAIL CHILLED R RAIL LOW R COVER CHILLED ROOM ASSY COVER DAMPER LAMP INCANDESENT COVER LAMP REF LAMP HOLDER ASSY KNOB TEMP CONTROL REF COVER DUCT REF INSULATION DUCT A 9 2 Refrigerating compartment Mec...

Page 41: ...LTC SEAL DAMPER A CASE CHILLDE ROOM TRIM SHELF SHELF WIRE REF SHELF WIRE REF ASSY SHELF REF GROMMET RAIL GROMMET RAIL GROMMET RAIL SHELF REF ASSY TRIM SHELF REF RAIL CHILLED R RAIL LOW R COVER CHILLED ROOM ASSY COVER DAMPER LAMP INCANDESENT COVER LAMP REF LAMP HOLDER ASSY KNOB TEMP CONTROL REF COVER DUCT REF INSULATION DUCT A GUIDE AIR SEAL DUCT REAR PBA PANEL 9 3 Refrigerating compartment Semi El...

Page 42: ... HANDLE REF CAP H D REF CAP H D FRE HANDLE TRIM REF HANDLE TRIM FRE SCREW MACHINE ASSY FOAM DOOR REF ASSY FOAM DOOR FRE ASSY FOAM DOOR REF GUARD BOTTLE GUIDE FRE LOW GUARD VARIETY GUARD EGG GUARD FRE LOW GUARD FRE UPP GROMMET DOOR STOPPER DOOR STOPPER DOOR SCREW MACHINE ...

Page 43: ...TCH DOOR CAP SCREW WASHER PLAIN HINGE MID ASSY HINGE MID COVER COOL L COVER COOL R SHIM HINGE MID SUPT FOOT FOOT FRONT HINGE LOW CHISSIS COMP ASSY COVER RELAY RELAY PTC GROMMET COMP PROTECTOR O L COMPRESSOR TRAY DRAIN WATER POWER CORD C OIL CASE JUNCTION COVER CASE JUNCTION PBA MAIN WASHER PLAIN FOOT FRONT ...

Page 44: ...COVER COOL R SHIM HINGE MID SUPT FOOT FOOT FRONT HINGE LOW CHISSIS COMP ASSY COVER RELAY RELAY PTC GROMMET COMP PROTECTOR O L COMPRESSOR TRAY DRAIN WATER SUPPORT MOTOR MOTOR FAN PROFELLER FAN SPRING POWER CORD C OIL CASE JUNCTION COVER CASE JUNCTION TIMER WASHER PLAIN FOOT FRONT HINGE UPPER ASSY CAP SCREW HINGE MID ASSY COVER COMP ...

Page 45: ...in the freezer room and get rid of the moisture in the freezer 2 Please pull up the top with a long nose and insert the hand into the gab as shown below Take a part the connected housing 3 When the COVER EVAP ASSY is taken a part take an action on the problem Reassemble the cover evap a ssy ...

Page 46: ...llows 1 Removethechillercompartmentby Puttingittowardsyouuntilitmeetsthestop Tiltingthefrontupslightlyandcontinuingtopullthe compartmenttowardsyou 2 Withaflat bladedscrewdriver priesouttheupperpartofthe lightcover Pullthecoverfree 3 Unscrewandremovethelightbulb 4 Insertnewbulb maximumof15W E14smallscrewbase 5 Replacethelightcoverbypushingituntilitclicksbackinto place 6 Replacethechillercompartment...

Page 47: ...ELECTRONICS ⓒSamsung Electronics Co Ltd Refrigerator Division 2003 04 Printed in Korea DA82 00004A 272 Oseon Dong Kwangsan Gu Kwangju City Korea 506 253 TEL 062 950 6811 6812 FAX 062 950 6829 ...

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