Maintain Medtronic Computer Tomography Motherboard Functional failures are mostly caused by chip damage. The interface part of the general circuit board is most vulnerable to the impact of harmful pulses of the power grid, lightning, and industrial spark pulses.
If it is confirmed that there is no problem with the interface circuit, then the corresponding logic signal can be injected from the interface circuit to track and locate and rework the faulty component on the electronic pcb card.
Sometimes the technical drawings and documents such as schematic diagram and layout scheme provided by computer tomography equipment manufacturer are not very detailed, which is a common problem encountered in the maintenance of circuit boards and can be acquired from PCB reverse engineering technics.
In this regard, the online tester provides a lot of convenience, providing more than 20,000 kinds of IC chip online functional test, is the most advanced repair board test instrument.
Under normal circumstances, you can find out the functionally damaged IC devices on the circuit board, or perform exclusive tests on the chips on the circuit board to narrow down the fault range, so as to determine the faulty chip.
For IC devices that are not included in the functional test device library, the interactive intelligent VI curve test function of the online tester can mostly determine the faulty IC chip.
In the CT circuit board failure test, in addition to the interface circuit should be checked first, the gate circuit between the buffer and the buffer circuit and the interface circuit and the latch circuit connected to it should be carefully checked. , Should be prioritized for testing.
The online status of various flip-flops, registers, and selector IC devices is often closely related to the status of other IC devices in the line,
The peripheral connected chips and circuits should be tested first. After confirming that there is no problem with the peripheral circuit, then conduct its own inspection.
