In Fudan University Eye, Ear, Nose and Throat Hospital bought a Siemens hearing aids out of warranty to find who repair?

Siemens hearing aids are national warranty, since the warranty period, then you go to any one of the regular Siemens hearing aid store can be repaired, the maintenance fee is charged if not chip (motherboard) damage, then replace a microphone, the receiver repair costs in two or three hundred dollars, the volume potentiometer is a few tens of dollars

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