Single Lead Electrocardiogram CPU Motherboard Repairing Solutions include obvious broken components checking, faulty soldering and adjustable resistor:
Find obviously damaged components
Carefully look at the components on the CPU motherboard to see if any are damaged or burned. Usually, it is easier to see capacitor expansion or MCU cracking, triode breakdown and burnout, or a resistor burning out. Replace components of the same model or other replaceable models if available.
Finding cold welds and corrosion points
Sometimes the printed circuit boards of some medical equipment are not soldered properly after use for a period of time, or some components have corroded solder joints, or the Single Lead Electrocardiogram machine’s working environment is relatively humid, which may cause corrosion on some parts.
It is easy to find these problems by using a magnifying glass. At this time, you only need to add soldering to the virtual soldering place and reconnect the corroded area.
Adjusting adjustable resistance
Some motherboards will have some adjustable resistors for troubleshooting. When a circuit board has an output but the output voltage deviates or a test point voltage deviates from the normal value, these adjustable resistors on the board can be adjusted to Make adjustments and use a multimeter to observe the results of adjustments online.
But before doing this work, you must mark with a color pen, and note how many turns are adjusted in which direction, so that even if the adjustment is unsuccessful, it can be reset again without causing artificial secondary damage over the faulty controller circuit card.
This method corresponds to the method described in the points above. It is important to understand the input and output of the circuit board or the voltage at the test point (it is best to ask the manufacturer for these materials when purchasing new equipment). Only by adjusting the adjustable resistance can these voltage values be adjusted to achieve the purpose of motherboard maintenance.
