Serpentine GN300 High-Frequency Electric Knife Repair Case

Appearance inspection: Check the appearance of the host is intact, and there is no obvious sign of external damage.

2. Fault phenomenon: The host is connected to AC power, and the error ER400 is reported when it is turned on.

3. Disassembly diagnosis: It is judged to be a power module problem. There are damaged components, multiple chips are burned, and internal signals are disordered.

4. Repair plan: ① Repair the power board ③ Calibrate the output voltage and strengthen the internal firmware. (No accessories for bipolar detection.