PCB board production is not a simple process to finish by the board, drill a hole component is good. PCB is not difficult to make, it is difficult to complete the troubleshooting after the completion of the investigation. Whether individual enthusiasts or industry engineers, the PCB circuit board in debugging problems encountered, but also a considerable headache, just like programmers encountered BUG.
Some people have a strong interest in the debugging of PCB circuit board, as the programmer in solving problems like BUG, PCB common circuit board and a lot of common problems in circuit board design, electronic components, damage the quality of the components, short circuit, PCB circuit board breaking fault in a few.
PCB common circuit board fault is mainly concentrated on the components above, like capacitors, resistor, inductor, diode, transistor, FET, integrated chip with obvious damage of the crystal, and the method of judging these components fault more intuitive through the eyes to see. Obvious damage to the electronic components of the surface, there are obvious signs of burning. Problems like this can be solved by replacing the problem elements directly.
Of course, not all of the electronic components damage can be observed with the naked eye, resistance, capacitance, as mentioned above, two or three diodes, and in some cases the damage is not from the surface to see, the need for maintenance by professional inspection tools, commonly used for inspection with multimeter, capacitance meter etc. and electronic components to a voltage or current in the normal range in the detection, the components or previous components problems, then check to see if the normal direct replacement.
The components are broken off, whether or observation instruments detection with the eyes, can be detected, but sometimes when we give PCB board components, will encounter the problem is not detected, but the circuit board and can not be operated normally. Many novice encounter such problems MEIZHE, only to re do a board, or buy a piece of. In fact, when faced with this situation, a lot of time in the installation of components in the process, due to the coordination of various components of the problem, there may be performance instability.
In this case, the instrument has been unable to help, try to determine the range of possible fault, according to the current and voltage to reduce, experienced engineers may be able to determine the fault area quickly, but the specific components which can not determine the bad 100%. The only way to do this is to try to replace the suspect components until the problem component is found. Last year, my notebook water board, in time to master maintenance had not detected the fault location, and the replacement of the three components in the repair process, which are power supply chip, diode, USB charging element (the notebook is blue socket that can be shutdown to charge the device), finally also through a wave detection with investigation and replacing a suspect chip, was eventually identified as a short circuit element on the edge of the South Bridge chip.
The above said is the electronic components of the problem, of course, since the PCB circuit board as components, so the circuit board fault must also exist, the most simple example of die tin parts, due to the production process, the PCB corrosion process, there may be a problem is broken. In this case, if the line can not be repaired, it can only be solved with a thin copper wire.
