Abstract：This article introduced two cases of power faults in the MAQUET Servo-i ventilator. Case 1 was that the main AC/DC
switching power supply (PC1955E circuit board) of the MAQUET Servo-i ventilator had no 12 Vdc voltage output and could not
be turned on normally; Case 2 was that the N28 socket of the DC/DC board (PC1778 circuit board) had no 12 Vdc voltage output,
causing the ventilator to have an alarm sound, black screen display and touch button failure. Using maintenance methods such as
online measurement and drawing circuit diagrams according to the arrangement of electronic components, it was easy to find and
judge damaged electronic components according to the fault phenomenon and theoretical knowledge of electronic circuits, and to
shorten the maintenance time. Through the analysis and maintenance of the power faults of MAQUET Servo-i ventilator, it can not
only improve the theoretical and practical level of medical equipment maintenance referring to switching power supply, but also
better ensure the stable operation of medical equipment and save hospital maintenance costs.
彭顺银，魏东，徐峰. MAQUET Servo-i呼吸机电源故障二例[J]. 中国医疗设备, 2022, 37(6): 170-174.
PENG Shunyin, WEI Dong, XU Feng. Two Cases of Power Faults in the MAQUET Servo-i Ventilator. China Medical Devices, 2022, 37(6): 170-174.
