Philip Intracardiac Hexagram Machine Motherboard Troubleshooting can apply for segmentation and replacement methods:
Segmentation is one of the methods commonly used by maintenance personnel to rework the instrument circuit board. It can quickly and accurately help us analyze the approximate location of the fault and reduce the scope of the fault.
However, when using the division method, the high-voltage part shouldn’t be divided as much as possible to avoid damage to high-voltage components, which are difficult to buy in the domestic market.
The replacement method is to repair some components on the PCB board without circuitry layout drawings and suspect that their stability is poor or damaged. Replace it with a good one under soldering. In principle, you should find the original type component replacement as much as possible. When the original model is replaced with another model, check the parameters of the two components, to avoid causing new failures artificially.
It needs to be reminded that there are many imported high-end equipment, especially the instruments produced by various manufacturers. They use more advanced production processes to produce multi-layer electronic printed circuit board which will become much more difficult to repair or reverse engineering. On the surface, they have printed circuits on both sides. In fact, the multilayer PCB board inside is laminated which are connected through plated through hole wall which is called VIAs. With several layers of circuits.
Most of our maintenance personnel do not have high-end desoldering tools in their hands, and a little carelessness will damage the internal circuits of PCB board. Once these circuits are broken, it is impossible to find them, let alone repair them. Therefore, when encountering this type of circuit board that needs to replace components, the best way is to desolder the damaged component from a little place, and then solder the newly replaced component to the cut place, and reduce it as much as possible which can minimize the artificial damage as much as possible.
