Use a magnifying glass to look for "magic smoke" signs—discoloration on IC packages or "bulging" near power transistors.
Repairing ECG semiconductors is a high-stakes task. Because these devices are "patient-connected," any "fix" must adhere to standards for medical electrical equipment. Always use medical-grade replacement parts. Never bypass a protection diode or fuse. manual ecg semiconductores pdf fix
Diodes and surge protectors that shield the device from defibrillator discharges. Use a magnifying glass to look for "magic
ECG machines are designed to withstand defibrillation. If a patient is shocked while connected to the ECG, the (usually Transient Voltage Suppressors or TVS diodes) take the brunt of the energy. it is likely shorted internally.
Carefully check for overheating semiconductors. If an IC is too hot to touch within seconds of powering on, it is likely shorted internally.