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故障现象Siemens(Magenton Harmony 1.0)磁共振仪正常扫描时,发出两次爆炸声,时间短促,梯度柜有焦糊味。故障检修打开梯度柜发现GPA(梯度放大器)故障。Z轴焦糊味较大。将Z轴与Y轴对换,显示Y轴故障。将Y轴拔出检查Y轴放大器已损坏。更换放大器。机器恢复正常运行。但仅仅几天之后,同样的故障再次出现,故障仍然是Z轴放大器损坏。
Symptom Siemens (Magenton Harmony 1.0) magnetic resonance instrument normal scan, the sound of two explosions, time is short, gradient cabinet with burnt smell. Troubleshooting Open the Gradient Cabinet and find that the GPA (Gradient Amplifier) is faulty. Z axis thick paste smell. Swap Z-axis and Y-axis and display Y-axis fault. Unplug the Y-axis Check that the Y-axis amplifier is damaged. Replace the amplifier. Machine back to normal operation. But just a few days later, the same fault reappeared, and the fault was still the damage to the Z-axis amplifier.