用万能表检测维修各种故障的电路板（Check and repair all kinds of circuit boards with universal meter）.doc

用万能表检测维修各种故障的电路板（Check and repair all kinds of circuit boards with universal meter） Check and repair all kinds of circuit boards with all kinds of troubles with the universal watch,.Txt occasionally look back, otherwise, always pursue, and do not know what you have lost. Men pay for lovers, women pay for relationships, men and women grab money for friends. Men love to see the woman with their eyes, the most vulnerable to beauty, women love to see the man, the most vulnerable to grief torture. This article is contributed by icy0755 DOC documents may experience poor browsing on the WAP side. It is recommended that you first select TXT, or download the source file to the local view. Check and repair all kinds of circuit boards with universal meter (1) off-line off-line detection chip on each pin between positive and negative resistance value, and then compare them with good chip, IC chip can measure each pin on between positive and negative resistance value in order to compare and find the fault point and the IC chip is good. Find fault points. On line detection (2) on-line detection 1) detection method of DC resistance. With offline detection, but attention should be paid to the detection method of DC resistance. But note: DC resistance detection method with offline detection, but pay attention to A. to disconnect the circuit board to be tested on the power supply. To disconnect the power supply on the circuit board to be tested. To disconnect the power B. universal meter on the circuit board to be tested, the internal voltage shall not be greater than 6V. The internal voltage shall not be greater than the universal meter. C. measurements should pay attention to peripheral influences, such as potentiometers connected to the IC chip. When measuring, we should pay attention to the influence of the periphery. When measuring, we should pay attention to the influence of the periphery, such as potentiometer connected with the chip. Measurement of direct current working volt