1. Distorted or unclear sound
It may be a fault of the stethoscope head, such as damaged diaphragm or aging sensor.
There is a problem with the earphone or speaker, resulting in abnormal sound transmission.
2. Abnormal volume
If the volume is too low, it may be a circuit fault, low battery or malfunction of the volume adjustment button.
If the volume is too loud and cannot be adjusted, it may be that the components of the volume control part are damaged.
No sound
3. The battery is dead or the contact is poor.
The connection line is broken, such as the headphone cable and the internal break of the conductive line.
The circuit board is faulty.
4. Noise interference
The surrounding electromagnetic environment interferes, such as being close to a strong magnetic field device.
The internal circuit fails and generates self-excited noise.
5. Key failure
The key itself is damaged.
There is a problem with the control circuit corresponding to the key.
6. Charging failure
The charger is damaged.
The battery is aging and cannot be charged.
The charging interface is loose or damaged.
