硬件调试方式（Hardware debug mode）.docVIP

硬件调试方式（Hardware debug mode） Debugging steps The debugging steps of the electronic circuit are as follows: block debugging or whole debugging: 1. check circuit Any assembled electronic circuit must carefully check the wiring for errors before commissioning. Control circuit diagram, according to a certain order of corresponding checks. Special attention should be paid to check whether the power supply is connected to a power source and ground fault, whether there is a short-circuit, whether the polarity of the electrolytic capacitor and diode connected in reverse direction, the integrated circuit and the transistor pin is wrong, gently pull a pull components, solder joint is firm, etc.. 2. way observation Be sure to debug the required power voltage value, and determine the circuit board power supply without short-circuit phenomenon, in order to power the circuit. Once the power has been connected, do not rush to use the instrument to observe the waveform and data, but to observe whether there are abnormal phenomena, such as smoke, abnormal smell, discharge of sound and light, components, such as hot hair. If there is, do not panic, but should immediately turn off the power supply, until the troubleshooting can be re connected to the power supply. The voltage of the power supply pin of each integrated block is then measured to determine whether the integrated circuit is energized. 3. static debugging No input signal is used to measure whether the DC operating voltage and current are normal at all levels. The DC voltage test is very convenient and can be measured directly. The measurement of current is not very convenient, and two methods are usually used to measure it. If the circuit has a breakpoint on the printed circuit board, it can be inserted into the ammeter to measure the value of the current directly, and then connect it with solder. If there is no test hole, the DC voltage can be measured, and then the DC current is calculated according to the resistance valu