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故障现象17:图像局部有规则阴影;有时又自行恢复正常(惠普HP77020AC超声诊断仪)。故障原因:场输出电路:电容C1439(470μF/35V)
Symptom 17: There is a regular shadow in the image; sometimes it returns to normal (HP HP77020AC Ultrasound Scanner). Cause of failure: Field output circuit: Capacitor C1439 (470μF/35V)