Repair Non-Functional Computer Tomography Circuit Board will take a lot of trouble to further find the specific faulty chip on the device. The failure phenomena on the circuit board are ever-changing and different, but they can be summarized as follows:
the performance of integrated circuits;
resistance-capacitance components deteriorates,
the unstable performance, and the function fails;
The virtual soldering, virtual connection, and open circuit of the chip and the device pins; the breakdown short circuit of the chip and the device, the pin collision, etc. will cause the Computer Tomography controller card to not running normally.
Specific analysis should be carried out according to the fault computer tomography mainboard malfunctions situation.
Short-circuit faults usually show that the power supply board of the subsystem is blown out or the power supply current greatly exceeds the value. The DC resistance of the power supply terminal of the general circuit board is more than 100 to hundreds of ohms. If the value is obviously low, it means that there are short-circuit damaged chips or devices on the board. Or device breakdown.
Short-circuit faults are sometimes visually detected to find faulty devices that break down into black. If the fuse is not burned, the temperature of the faulty chip will be overheated when it is powered on for 5min ~ 10min, which is obviously higher than that of the normal chip. If the fault is hidden, use a short-circuit fault tester or an intelligent short-circuit fault tracker to easily and quickly find the short circuit device or short circuit point.
