REPAIR Check free download

File name electronic compound check.pdf

Component Testing Technical Manual Introduction: Digital multimeters can test a variety of electronic components. That's primarily what they're used for. Any technician worth their salt knows how to use a meter to test suspect components and troubleshoot electronic circuits. It's important to note that this exercise is a continuation of the Digital Multimeter exercise found in the Tool Use and ID module. You might want to review it. In this lesson you'll discover the true versatility of the Digital Multimeter and acquire some very important troubleshooting skills. Please remember that all meters are not the same. Some do not perform all test operations. The instructions listed below will work with any digital multimeter providing the meter has a continuity and resistance function setting. Your goal is to test the components in your electronic experimenter's parts kit. You'll not only become more familiar with your multimeter, you'll also insure that you have all your parts and that they're in good working order. Study the test procedures as outlined below and then print and complete the exercises. Words and Terms You Should Learn: Continuity Open Circuit Short Circuit Terminal Wiper Polarity Electrolytic Electrostatic Charge Coefficient Momentary Contact PN Junction Anode Cathode Emitter Base Collector Pin-Out Forward Bias Reverse Bias Gate Trigger Hold Doping Testing Passive Devices Passive devices are electronic components that provide no electronic gain or control. They don't amplify, rectify or switch, but they do react to voltage and current. Wires, resistors, capacitors, coils, and switches fall into this category. Although passive devices are the least likely to malfunction, you should be able to test them if they're suspect. The following panels will show you step-by-step procedures for testing the most common passive devices. Jumper Wire Test Procedure 1. 2. 3. Connect the test probes to the meter. Setup the meter. Connect the test leads to opposite ends of each jumper wire. Meter Setup Function: Continuity Range: Min Max: Hold: Hz: Auto Off Off Off Indication GOOD BAD Beeper turns on direct continuity. indicating Beeper will not turn on and the resistance will read greater than 20 Ohms or indicate OL. Test Device Ohms. Component Testing Revised 11/7/2003 Frank C. Pendzich 8 July, 2002 Schematic Application Notes: The continuity function works best as a fast convenient method to check for open circuits and shorts. The continuity check tests for resistances <20 Page 1 of 15 Battery Snap Test Procedure 1. 2. 3. 4. Connect the test probes to the meter. Setup the meter. Connect the test leads between the large connector and the end of the red wire on the battery snap. Connect the test leads between the small connector and the end of the black wire on the battery snap. Meter Setup Function: Continuity Range: Min Max: Hold: Hz: Auto Off Off Off Indication GOOD BAD Beeper turns on indicating direct continuity for each wire. Beeper

File name How to Test Mobile phone Speaker.pdf

How to Test Mobile phone Speaker,Buzzer or Ringer Speakers also known as earpiece is the device that allows the handset user to hear the other user during call convesations. While the Buzzer or a Ringer is the one that sends out the ringtone to be heared by the handset user. Both Earpiece, buzzer or ringer are same speaker. it only varies the loudness of it sounds being produce. Ringer buzzer generates more loudness than the earpiece speaker. A speaker is a device that converts electrical signal into sounds. It is made by a magnetic wire winded into a coil and a metal piece of magnet. below is an example oh how to test of a good and working speakers . Simply set the analog or digital multi-tester to X1 resistance value, and attach one probe to one the speakers terminal while tick tacking the other one unto it. A working speaker produce a crackling sounds and the multi-tester pointer moves, while the a busted one will not and have no reading. How to Test Mobile phone Microphone or Mouthpiece Mobile phone microphone also known as mouthpiece is the one that intercepts the voice to transmit to other mobile phone users. Without it or a defective one will result that the other user on a phone cannot hear the one with a defective microphone on its mobile phone handsets. A technical term of a microphone is a device used to convert sounds into electrical signal. A microphone is made of an electrical magnetic wire shaped into a round coil with a magnet metal surrounds it, the mechanical vibration generated by it will then produce an electrical voltage signal. Checking the microphone is also been so easy, Just set the analog or digital multi-tester to x1 resistance value then attach both test probe to its terminal. A good sign of a working microphone tends to have a reading while the busted one will have no reading. In some other cases types of microphones may only have a reading to the range of x10 for some high resistance value. Power ON OFF Switch on Mobile Phone - Test and Check Up Procedures ON/OFF Switch on cell phones comes different varieties and forms or designs but the fundamentals on how does it work or where to use it is the same. On Off switch can be determine by the number of its legs or terminals. This cell phone repair tutorial for beginners covers on how to check the power on off switch on mobile phones and also work on volume key switches. Here's a brief information on every ON and OFF switch which covers how the components being assembled and by this information you can easily test and check up the said switch if it is good or in working condition. By checking on off switch is been so simply by just only checking its terminals conducting continuity. A broken power on off switch can be easily determine when its visual assembly is busted out, so this procedure below covers only when the said switch visual assembly seems to be good. This also the first step to repair the mobile phone if unable to power up, its like happens when the phone