Commonly Seen Faulty Issue in Troubleshooting Computer Tomography PCB Board include Migratory or unstable faults are mostly caused by poor device performance, poor temperature characteristics, and poor contact of device pins.
For devices suspected of degraded performance, use a memory oscilloscope to carefully observe and compare the changes in the logic waveform. Whether the waveform generates glitches or jitter, etc., can often find faulty devices.
For chips suspected of poor temperature characteristics, isolate them from the surrounding chips with an insulating substance, blow cold air and hot air separately with a micro hair dryer, observe the circuit state changes, and often find unstable chips.
Random faults are generally caused by random causes, but in addition to poor anti-interference ability, such faults are mostly caused by poor contact.
Most of these faults can not find specific fault points or faulty chips, and should be analyzed and processed according to the signal flow and logic diagram. Poor contact failures on faulty controller circuit cards are mostly caused by poor contact of pins of IC pins with multiple pins, such as processors, registers, etc., especially square plug-in chips.
After desoldering it off from circuit board, wipe the chip pins with rubber to make it bright and clean. Use a small brush to carefully clean the socket. After reinstalling, it will work more effectively.
