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Message: <blockquote data-quote="laal" data-source="post: 8537216" data-attributes="member: 94459">Safety Procedures and Proper Handling of Tools and Test Equipments on Cellphone RepaiSafety procedure and proper handling of tool is highly  observed  when working any electronic components to avoid risk of  unnecessary further damages whatever you are working at.  These are the  following thing that always to remind when working any electronic  components such as cellphones.Antistatic Wrist StrapWear a Ground Strap.  Anti static wrist strap is used to avoid risk of electrostatic discharge from a human body to an electronic component circuit.An antistatic wrist strap, ESD wrist strap, or ground bracelet is an  antistatic device used to prevent electrostatic discharge (ESD) by  safely grounding a person working on electronic  equipment.<a href="http://s946.photobucket.com/albums/ad302/djniel2k/cellphone%20repair%20tutorials/?action=view&current=Antistaticwriststrap.jpg" target="_blank"><img src="http://i946.photobucket.com/albums/ad302/djniel2k/cellphone%20repair%20tutorials/Antistaticwriststrap.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a>It consists of a stretchy band of fabric with fine conductive fibers  woven into it. The fibers are usually made of carbon or carbon-filled  rubber, and the strap is bound with a stainless steel clasp or plate.  They are usually used in conjunction with an antistatic mat on the  workbench, or a special static-dissipating plastic laminate on the  workbench surface.Hand GlovesYou are not just protecting your hand from posibble burns or brushes. it  also protect the cellphones from scratches and possible electrostatic  discharge. A cotton cloth made glove is essential to use.<a href="http://s946.photobucket.com/albums/ad302/djniel2k/cellphone%20repair%20tutorials/?action=view&current=handgloves.jpg" target="_blank"><img src="http://i946.photobucket.com/albums/ad302/djniel2k/cellphone%20repair%20tutorials/handgloves.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a>Safety Handling with Rework and Soldering StationsRework and soldering Station is a hot surface devices and can cause fire  instanly and extreme burns on skin when unproperly handled. Always Observe and Set it in proper  heat and air flow amounts.<img src="http://lh4.ggpht.com/_8JZhVVmpICU/S8QUXN3PzyI/AAAAAAAAAMM/7C0cWNR3UGQ/SMD%20analog.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />Secure  a safe place on your table where the rework station is located. Avoid  inplacing it that people may pass or standing by especially kids.<a href="http://s946.photobucket.com/albums/ad302/djniel2k/cellphone%20repair%20tutorials/?action=view&current=solderstand-1.jpg" target="_blank"><img src="http://i946.photobucket.com/albums/ad302/djniel2k/cellphone%20repair%20tutorials/solderstand-1.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a>Always shut it off when not in use and place unto the holder stand to avoid risk of fire and skin burns.Safety Handling of a Multitestera multitester may damaged easily when unproperly handled. always check  ranges when checking voltages and currents. The deplection yoke of the  analog meter may be bust out when overdrive by a current to it.<img src="http://lh6.ggpht.com/_8JZhVVmpICU/S8QmwBd1cEI/AAAAAAAAAMo/XZCzS3MVeek/analog%20tester.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />Measuring ResistanceSet the multimeter to Ohms or Resistance (turn meter on if it has a  separate power switch). Understand that resistance and continuity are  opposites. The multimeter measures resistance in ohms, it can not  measure continuity. When there is little resistance there is a great  deal of continuity. Conversely, when there is a great deal of  resistance, there is little continuity. With this in mind, when we  measure resistance we can make assumptions about continuity based on the  resistance values measured. Observe the meter indication. If the test  leads are not in contact with anything, the needle or pointer of an  analog meter will be resting at the left most position. This is  represents an infinite amount of resistance, or an "open circuit"; it is  also safe to say there is the no continuity, or path between the black  and red probes. Careful inspection of the dial should reveal the OHM  scale. It is usually the top-most scale and has values that are highest  on the left of the dial (a sideways "8" for infinity) and gradually  reduce to 0 on the right. This is opposite of the other scales; they  have the lowest values on the left and increase going right.Mesuring Voltage Ac-DCSet the meter for the highest range provided for AC or DC Volts. Many  times, the voltage to be measured has a value that is unknown. For this  reason, the highest range possible is selected so that the meter  circuitry and movement will not be damaged by voltage greater than  expected. Measuring Current by AmpereSet the meter to the highest AC or DC Amp range supported. If the  circuit to be tested is AC but the meter will only measure DC amps (or  vice-versa), stop. The meter must be able to measure the same mode (AC  or DC) Amps as the voltage in the circuit, otherwise it will indicate 0.<img src="http://lh3.ggpht.com/_8JZhVVmpICU/S8Qmwj30eqI/AAAAAAAAAMs/4kC2dxIIo4Q/digital%20tester.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />Be  aware that most multimeters will only measure extremely small amounts  of current, in the uA and mA ranges. 1 uA is .000001 amp and 1 mA is  .001 amp. These are values of current that flow only in the most  delicate electronic circuits, and are literally thousands (and even  millions) of times smaller than values seen in the home and automotive  circuits that most homeowners would be interested testing. Just for  reference, a typical 100W / 120V light bulb will draw .833 Amps. This  amount of current would likely damage the meter beyond repair. A  "clamp-on" type ammeter would be ideal for the typical homeowner  requirements, and does not require opening the circuit to take  measurements (see below). If this meter were to be used to measure  current through a 4700 ohm resistor across 9 Volts DC, it would be done  as outlined below: Safety Handling of a Power SupplyPower supply may also damaged and cause damaged to a component..<img src="http://lh4.ggpht.com/_8JZhVVmpICU/S8Typu29PBI/AAAAAAAAANM/R6m-3-u_pZ4/a%20dc%20power%20supply.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />Always set it and determine the correct amount of Voltage range to avoid risk of blowing out any electronic parts. <a href="http://s946.photobucket.com/albums/ad302/djniel2k/cellphone%20repair%20tutorials/?action=view&current=ps-1.jpg" target="_blank"><img src="http://i946.photobucket.com/albums/ad302/djniel2k/cellphone%20repair%20tutorials/ps-1.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a>Do not short the two alligator clips because the power supply will heat up and may busted out the protection fuse.</blockquote>

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