This timeline captures the major milestones in Samsung history, showing the company expanded its product lines and reach, grew its revenue and market share, and has followed its mission of making life better for consumers around the world. Samsung Electronics, a leading company for the digital convergence movement with a variety of products such as LCD TV, LED TV, Mobile Phone, Home Theater System, Blue-ray DVD Player, Monitor, I-ADD, ODD, Printer, Air Conditioner, Washing Machine, Refrigerator, among others, will inaugurate its newest Customer Service Center at the new Du Point Building along Don A.
Bevel SST. , Canaan De ROR City. The Customer Service Center is carefully designed for a look and feel of comfort and convenience. Its friendly Customer Service Representatives are ready to assist the customer’s needs whether it may be for mobile phone cleaning or even TV repairs. The Service Center is a one – stop shop that provides after sales service to all Samsung products. And since it is a “green” center, recycle bins are stationed inside the Service Center for people who want to dispose their batteries containing lead and other toxic chemicals.
INTRODUCTION On the Job Training is a joint venture of the student, the school, and the company. It is also a means of integrating in – school – training with on – the -job training in an occupational career field. Also, and experience working in their field. This can also make the student expose to working activities and apply the learning what the instructors educate. The student can be able also to adjust easily in the operation. Most company now a day prefers to employ workers that have experience working on the Job they will take.
The trainee took his On the Job Training in Samsung Customer Service Center at Bevel Street, Canaan De ROR City during April 10, 2012 till June 16, 2012. Samsung Customer Service Center is the only service center in the entire Misaims Oriental that accepts in and out warranty Samsung Products such as TV, Washing machine, Air conditioner, refrigerator, Computer, cell phones, camera and etc. The service center has two groups of technicians, namely the brown lines and white lines. The brown lines are in – charge of the troubleshooting and repair of TV, computer, component, cell phones, etc. Except the refrigerator, air conditioner and washing machine. The white lines are in – charge of the troubleshooting and repair of the refrigerator, air conditioner, washing machine and air conditioner installation. The service center has the capability to train students in their trainings. Computer Stud sees LEARNING EXPERIENCES During fifty two days of JOT at Samsung Customer Service Center, the trainee was able to observe and learned the following: Troubleshooting safety measures To avoid possible damages or electric shock or exposures to radiation, the trainee observes some tips of safety works.
Make sure the multi tester is set correctly to the desired testing values. Use protective devices including non-metallic handles and compartment covers. Do not add any audio or video accessory or changes of the circuit it might cause physical damage. Make sure the TV AC cord is unplugged and high troubleshooting. When any parts, material, wiring appeared overheat or damaged, replace them with the new functional one immediately. When testing circuit, check everything that might cause short circuit. Television Flat Television squid Crystal Display TV We can identify it by merely looking at its model prefix, example LAVABO OFF.
Then its screen sizes according to inches. It has major parts, namely, main board, X board, Y board, power supply, and panel. CAMPAIGN POLYTECHNIC STATE COLLEGE – Institute of Engineering and Troubleshooting Frequent trouble of an LCD TV is no power. To troubleshoot, first, check the AC cord connectivity, if no trouble, check the power supply. Visually, check defective parts like leaking capacitor and Integrated circuits then replace it then try the unit if it power on. If there is available the same model good power supply, temporarily replace it to assure that the trouble is in the supply.
If the unit turns on then we conclude that the trouble is in the power supply. In warranty units, usually, the whole power supply board is to be replace, however if out of Check the diode, capacitor, inductor and other component through the use of multi tester. Testing a good diode, the diode must deflect at one direction according to each polarity and has a linear voltage of 0. 7 volts. A good capacitor must deflect and then the pin will return to zero reading immediately. A good inductor will deflect, connectivity checking. In checking integrated circuit, voltage input and output value checking is used.
The good transistor will deflect at one direction on its base to emitter just like diode. Some no power trouble in TV is not in the power supply, main board, sometimes it is in the touch button or in the button switch for power on/off. So the trainee was also assigning to trouble switch buttons. If the trouble is the in tuning, the LCD TV does not detect channels, the defective part is the tuner, and the tuner is located at the main board. Usually once is defective, it is replace directly or else replace the whole main board if no available tuner.
If the trouble is in the main board, as what the trainee learned, usually the TV screen is dim, can powered on however it will power off after few minutes. Also, another symptom of a defective main board is the screen has no video and no audio. The trainee and the technician troubleshoot the main board thorough checking the components, however if the trouble is hard because of its complex circuitry and small components, the whole main board will be replace directly just like troubleshooting computer parts. If the screen has thin defective is the Y board.
If the line is vertical then the defective is the X board. The board is troubleshooting it by parts or replace directly because it has small components. In the case of no audio or cannot be volume, sometimes the trouble is not in the main board, it is in the push button switch or the remote, the troubleshooter must consider this case. If the problem is in the panel or the display screen. The panel is compose of TCO or the circuit board connecting display screen and main board and the screen itself. The TCO serves as the control circuitry of the input signal from the main board.
The symptoms are; the unit will display but does not raster. A crack panel is a clear sign of defective panel. The panel is composed of layers of glass and other components, when it is crack there is no chance to repair it, the solution is to replace it by the same model. However if the screen has no defect in the glass layers and back lights, the troubleshooter can conclude that the defect is the TCO. Since TCO is a part of panel, when replacing a panel TCO is included also. If there is available TCO in the same model, it can be also replace directly without including the screen.
When the panel is defective, it does not mean that the whole panel is defective, the back light of an LCD TV is composed of several thin fluorescent in U form. If one of them is defective, the part of the screen, where in the back light is defective, is dim in display during power on. However, as the trainee usually experiences, the whole panel will be replace directly. Plasma TV and Light Emitting Diode (LED) TV The Plasma TV has a thickest in appearance among the three types of flat TV and usually identified as AS TV. The LED TV is thin and has a model Prefix of CIA, Example SIMULACRUM.
In troubleshooting this Plasma Display TV and LED TV, it is the same with the LCD TV. There signs of trouble is the same. However the plasma TV has a sensitive to shock panel, it is easily crack. They only differ in the appearance, circuit design and fabrication of the casing. Computer Studies Parts Replacement of Flat TV The trainee was assigned to replace directly defective parts of flat TV, whether LCD, LED or plasma. Usually if the main board, panel and X and Y boards has defective components, the customer service directly replace the whole board.
In loosen screws, separate screws for metal and for plastic. The metal screw has fine threads compared to plastic screw which is broad. In replacing panel and boards the trainee and the technician must be careful of to avoid damages. CRT (Cathode Ray Tube) Television It has the major parts, the main board, CRT board, yoke, and the picture tube. The audio, video and signal, and power supply circuit is located at the main board, the power supply is known as the primary parts of the board and the other part is the secondary.
Troubleshooting CRT TV First, the trainee and the technician identify the symptoms of the trouble, whether no power, line in the screen, no display but has power, no audio, no aster and others. If possible before troubleshooting the components solder again the dry solder and try the unit if it is k. If not, then go for harder troubleshooting. When the unit has no picture display and no sound, first check the AC voltage impress. Check the master switch On. Check the fuse. If the fuse is not k, replace, and then if the TV is k then the repair is complete.
If the fuse is k, check the Diode in the power supply, near the high voltage capacitor. If defected change it. If the diodes are k, check ICC or the regulator ICC. If it is not then K replace it. If none of them is defective, check the other parts. From the fallback, the transformer, there is a different voltage output, example the B+, 1 25 V line, and others, check the connectivity and voltage must be the same. Diode must defect at one direction only according to its polarity. This method is known as voltage tracing. The trainee also checks visually obvious defects like exploded capacitor, resistor and ICC.
If there is a horizontal line in the screen check the vertical ICC and if vertical line in the screen, check the horizontal. Then, temporarily replace by the good ICC it to heck the CAMPAIGN POLYTECHNIC STATE COLLEGE – Institute of Engineering and Computer Studies unit, if it is k then the repair is completed. However if there is an unusual lines appear in the screen when watching or recording, try to keep the video player as far as away from the Television as possible because it can cause signal interference. If the TV is no sound but has video, the trouble is either in the audio circuit or in the speakers.
Check it and replace the defective. If the TV has an audio but no display. Check the voltage from the main board to the CRT board. If the voltage is not k then the video circuit of the main board has a trouble. If the output of the main board to the CRT board is k, check the wire connection and components of the CRT board. If CRT board is defective then replace it. If the CRT board is k, proceed to the yoke, yoke is a coil, so check for wire connectivity or check if is not shorted. If the yoke is k, so the picture tube is defective. Replace it and if the TV is k then the repair is completed.
If the problem is no channel, then check for the tuner and antenna. If the antenna is k, check the tuner. It is replaceable, try a good tuner to check it. After the tuner is replace, fifth TV is k then the repair is completed. If the trouble is hard, if possible float one or two terminal of the components when checking resistor, diode and transistor because when it is near to an inductive component it will not deflect accurately. The technician told the trainee, to take note: in troubleshooting CERT., Unplug the TV when troubleshooting, discharge the high voltage capacitors in the primary part of the main board.
In replacing capacitors it must be in correct polarity. When using tester make sure the grounding lead of the connecting to he positive lead. The ground lead must be removed last. Beware of risk of any current leakage coming into contact with the high capacity capacitor. Removing CICS with heat sink must be observed. Include the heat sink must be observe. Include the heat sink when removing transistor to avoid damaging it. After repair, make sure to check the screws, parts, or cables properly installed. Make sure no damage is caused to the repaired part and its surroundings.
Computer Studies DVD Player DVD has player major parts namely; main board, power supply board and the DVD deck. First check the signs of the trouble. If the trouble is always loading the DVD. Open the device and clean the reader lens. Then, if the player is k, the repair is completed. If the trouble is the same, temporarily replace the main board by the good main board of the same model. Of the player is K then the main board is defective. However, if the trouble is the after the main board is replaced then the DVD deck is defective. Replace the Reader Lens assembly.
If the trouble is always open, check the motor and replace it. If the main board is defective replace the whole main board because it has a complex circuitry. If the DVD player has no rower check the fuse, if the fuse is K the proceeds to the diode and capacitor checking. Replace the defective component then if the player is K then the repair is completed. Sound Box Troubleshooting Sound box has simple circuitry. It is only compose of wire and speaker. Check wire connectivity and speaker conductivity. Audio Component Refrigerator An appliance, cabinet, or room for storing food or other substances at a low temperature.
Computer Studies Troubleshooting Refrigerator will not defrost, refrigeration normal with compressor running, turn defrost timer shaft until one click is heard. When compressor stops, check timer motor operation, observe rotor through window on the back of the timer. When motor rotates, replace the defrost timer. However when the motor does not rotate, check voltage to timer no. 3 terminal, if no voltage, check the circuit wiring and if there is voltage then the defects is the defrost timer. Another trouble, refrigerator will not defrost, with compressor running, turn the defrost timer shaft until one click is heard.
When the compressor continuous running, then the defrost timer is defective. The same trouble, refrigerator will not defrost, with compressor running, turn he defrost timer shaft until one click is heard. The compressor stops but no defrost; remove the service cord from power outlet. With the Ohm meter check continuity between terminals 3 – 2 of the defrost timer. However if meter does not register, replace defrost timer. If meter register, replace defrost timer. However if meter registers, check continuity across defrost termination thermostat (at below -5 degrees) then if still meter register, check continuity across defrost heater.
If meter does not register, then defrost heater is the defective. However if the meter registers, check the wirings. If below -5 degrees Celsius, will not register, replace directly the defrost termination/thermostat. Another trouble, compressor will not run, open food compartment door and check interior light. If light is On, turn defrost timer until two consecutive clicks are heard (not in defrost) if compressor does not run, bridge the thermostat line terminals, if the compressor runs, the thermostat is defective.
However if the compressor does not run, check for the voltage at relay package (black and white leads), if the voltage is K, fit external test cord to compressor, if the compressor is defective. However at relay package, no voltage, check defrost timer operation, if K check circuit wiring, if not K, so the defrost timer is defective. In defrosting thick ice, use hot water and electric fan to defrost ice when troubleshooting. Fan will not run Make sure compressor is running check fan for mechanical bind, if fan seized, replace fan motor.
Notice of Using Do not operate the refrigerator in the presence of explosive gas to avoid fire or an explosion by ignition of the electric contact of the refrigerator. To save money do not overload your set with a lot of foods leave proper spaces. Cover moist foods with tight lids plastic containers or wrapped in Vinyl film. Air Conditioning The sizes of air conditioner depend on the sizes of the room to be air condition. It is measures in horsepower/ton/K/H, example of modes are ASPI PALS, ASPI 3, and SAVIOR. There are various type of air conditioner according to use, they the window, split, floor and ceiling.
Regular Air Conditioner The older model of air conditioner that is directly supplied by an AC supply voltage. No electronic involve in the circuitry. The disadvantage of this model is it consume high electrical consumption. Smart Inverter Air Conditioner This type of air conditioner has an electronic part that supplies the motor and other components through the inverter. Inverter means from AC converted to DC then back to AC. The advantage of this type is it saves Forty percent, 40 percent, of electrical consumption compare to the regular air conditioner.
Split type air conditioner installation Correct installation is needed to satisfy costumer and to add the life span of the unit. There are major parts of a split type air conditioner, the indoor/evaporator and outdoor/condenser units involve in installation. To install the unit there are trials needed, one is the copper tubes to use as piping connection between the indoor and outdoor unit. There are two sizes of copper tube needed, the primary usually big measuring either, 1/2, 5/8 or 3/4 inches diameter depending to the raccoon size. The secondary pipe, small pipe measures 1/4 inches in diameter.
The indoor and outdoor unit has a communication wire to supply the compressor and to communicate electronically in smart inverter type air conditioner. The wires are 1_1, L 2, Fl, IF and E as ground. Then the wire and copper tube will be insulating by a rubber insulator to absorb the tube moisture ND to secure it from any disturbance. The insulator will be rolling by Teflon. In installing the indoor unit, it must have at least 8 inches allowance from the air inlet of the evaporator to the ceiling, because it absorbs air for the evaporation. The indoor unit has a metal plate at its back; the unit will be hanging and lock on it.
Then, it has a drainage connection, the flexible hose, the hose must be lower from the indoor unit in order to have a continuous water flow produce by the moisture of the evaporator. The hole for the piping is located adjacent to the metal plate. The outdoor unit can be place at the back or any place between thirty meters from the indoor unit. There are fitting valves used for connecting the piping. To connect it we need to use a flier tool. The flier is use to expand the pipe in order to fit it to the valve. For long piping, the copper tube will be solder.
In soldering, flier the pipe first, connects then solders it by a copper rod using a map gas or blue torch. Make to solder properly to avoid leaking of the Freon gas. The outdoor unit must have also an allowance of at least twelve inches from the wall to the air inlet of the condenser. The area must be secured from any disturbance and safety of the unit. The unit has a free Freon in the compressor. Loosen the gas valve in the outdoor unit. First the small copper tube, then check for gas pressure at the charging valve, presses at less three times to check the tube. Then loosen the large copper tube.
The piping must not have leaking in order to maintain the gas refrigerant inside the tubes and to maintain the cooling capability of the unit. To check leaking use a gauge, connect it on the expansion valve, then the gauge must read and the reading must not constant, once he reading is not constant then it is concluded that the tubes are leaking the refrigerant. To identify the leak portion, use a soap bubble; place a bubble on the connected valve and copper tube. If the bubble multiplies, then it is the leaking portion, tighten it again. If no more leaking then the installation is done.
Cleaning Cleaning maintenance is very important in the unit. In cleaning, water compressor is use to have a high pressure water. If the unit is unclean, its cooling capability is low. The filter of the unit must be clean at least every five days. The unit must be clean at least once every three months. The sign of unclean unit will produce ice in the outside of the evaporator. The trainee was assigned to assist and to clean both split and window type air conditioner. In cleaning window type, the unit will be trying first at least ten minutes before it is remove from the casing.
After the unit has been tried, remove the cover and filter, remove the circuitry assembly and disconnect the terminals connecting to the capacitor it must not be wet by a water to avoid short circuits. Use screw driver, since the capacitor is high voltage. Clean the unit and let it dry for few minutes then assemble again. Then back it not the cover hen try the unit. In cleaning Split type air conditioner clean the evaporator first then the outdoor unit. In cleaning evaporator the circuit board must not be wet by water, remove it or cover.
Make sure to remove all the dirt inside the unit. Air conditioning troubleshooting when the evaporator fan won’t run. Check for power at the evaporator fan relay. If it gets power but the contacts don’t close, it has failed. If it gets power and the contacts close, but the fan doesn’t run, check for voltage on the load side of the relay, check the leads to the fan, test the fan windings and the capacitor, and check to see if something is tuck in the blower and stopping it from turning. When the unit turns K, then Noisy Unit The Air conditioner is noisy only if the motor is defective.
Once a unit is flooded or houses near the seashore the bearing of the fan motor will corrode. Replace the bearing to solve the trouble. Low Cooling One reason of a low cooling unit is unclean. Make sure to have maintenance cleaning of the unit at least once every three months. If the unit is unclean the outside of the copper tubes in the condenser will ice. Clean the unit using a water compressor if the unit turns K, then the trouble is solved. If the trouble is the same, check the condenser copper tube, evaporator copper tube and connection copper tube (split type air conditioner) of any leaking of the refrigerant gas.
If there is leaking of refrigerant the sign is the copper tubes is dry and the unit operate like just an ordinary fan. Find the leaking using soap bubbles; the leak portion will produce bubbles. Solder it and charge an additional Freon Gas on the copper tube expansion valve. No Power Unit Check the AC cord and wiring conductivity in the unit. Check the switch assembly by using a multitudes or simply shorting the wires connecting the witch, if the unit turns K, replace the switch, then repair is completed.
Compressor will not run Check the starting capacitor because when compressor malfunctions capacitor is the first to be check. If capacitor is defective, then replace it. If the capacitor is K, check the overload protector in the compressor. If the overload protector is shorted then replace it. Also polish the clips connecting the compressor terminals. If the trouble is the same then replace the compressor. Washing Machine Washing machine has major parts, the main board, tab motor shafting, spin motor, water level sensor, and water entry and drain sensor.
CAMPAIGN POLYTECHNIC STATE COLLEGE – Institute of Engineering and Computer Studies Low Spin Check the motor shafting if it is connected correctly. If the shaft is K, check the wire connection if there is any defect, if none replace the spin motor. If the unit is K, repair is completed. If the unit cannot sense water level, in this trouble, directly change the water sensor. If the trouble is the same then replace the main board or else trouble it by components. However, main board usually be replacing directly because it has hard water proof insulation. If the unit is K, repair is completed.
If the unit has water entry even start is not yet press or no water entry when start is press. Replace the water entry assembly. If the unit cannot drain, then replace the drain assembly. If the unit is K, repair is completed. Laptop Computer and Flat Monitor The trainee was assigned to troubleshoot a no power monitor; through the aid of the technician the trainee knew the trouble in the switch button. The trainee knew the trouble in the switch button. The switch assembly was replaced. The trainee also assigned to replace a part of the monitor for example, the main board and display screen.