Diodes test is different from a test of strength because you need the ability to do so. If you do not know if a test diode can not repair the equipment. A bad diode that I think is a good thing. This will certainly lose valuable time. A rectifier diode can fail in one of four ways. Can be:-Open-
short-Leaky-
during the collapse in full operating voltage of an analog multimeter or digital multimeter can be used to verify if all the first three conditions with the exception of where the last diode breakdown in full operating voltage. From my experience in the repair of the line of electronics, I found that checking diode using analog multimeter is more accurate than using a digital multimeter. I could explain why I preferred analog meter. I do not know about you, because I find a good number of diodes where it checked ok using digital multimeter, but not when tested with analog gauges. The first step on the way to test a diode is to remove one of Diodes lead. You ca not always be certain if a diode is good or bad if it happens in the test circuit because of back circuits through other components. To be sure, will promise, or connect an LED driver circuit to avoid back circuits. Unless you are sure that the Committee expected. Sometimes I found Diodes poor while registering on board. His experience will tell you when to check a diode on the board or off board. If you're new to the repair of electronics, I recommend you check a diode with a lead removed from the board. I put my analog meter to x1 ohms to verify the diode current and reverse the headlong rush into the tests. Connect the black investigation on the counter to the cathode and red probe to the anode, the diode is reverse biased and should be something like a reading. Connect the red survey on the counter to the cathode and black probe to the anode, the diode is biased and before the meter should read a value of the resistance. If you have two polls more than likely that the diode is short-circuit or leak and must be replaced. If you do not receive any reading either forward or reverse bias, the diode is considered open. The real problem when checking a diode using diodes based on a digital counter that is open or leaky diode, the meter sometimes reads ok (0.6). The reason is that digital Dies meter test output voltage (which can measure the output of the probe test with a different measure) is about 500mV to 2v. An analog meter to x1 ohms have on production 3V (remember the two 1.5V battery has been installed on the counter). The voltage of 3V is sufficient to show that the exact interpretation of a diode when it is put to the test. Even if you have a good reading on x1 ohms does not mean that the diode is good. Now you must configure your accountant x10K to test the diode again. The output voltage of x10k ohms is about 12V (remember 9V battery in your player 1,5-1.5 V v 9 v = 12V). ATTER diode test should show a single reading. This is an exception to the Schottky diode with two polls, but not short-reading. If the meter showed one reading then diode under test is good. If you have two polls more likely that the diode is either short circuit or leak. The digital meter on no evidence, because the exit of the subway is only 500mV at 2V. If a diode breakdown when the full operating voltage, there is no way of testing diode (unless you have a very expensive diode checker to find this type of problem). Replace with a diode work is often the only way to prove that an intermittent diode is causing a particular problem. Sometimes an intermittent injection diode can find with a cooling spray. Caution: Make sure the power is cut off from any circuit before performing any of the following diode control, otherwise meter or circuit could cause damage. In conclusion, to get the right test diode function, you must set the analog meter x1 ohms and x10K ohm range. Jestin Yong is an electronic workshop and a writer. For more information on the repair of electronics, visit their website at http: / / www.noahtec.com / electronic-repair-articles.htm http://www.noahtec.com/electronic-repair Articles. htm
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