caso de reparación
Dual-Voltage placa no eleva el bus
Utiliza esta página cuando a 220V/380V soldadora inverter enciende pero the entrada switching o boost etapa does not produce the expected bus DC level.
Comprobaciones principales
| Comprobación | Valor esperado | Si es anormal |
|---|---|---|
| entrada selection/detection | placa detects 220V o 380V correctly | Detection resistencia, comparador o optocoupler falla |
| relé coil supply | relé receives rated coil voltage when commyed | Driver transistor, diodo o auxiliary supply falla |
| relé contacts | Contacts close con low resistance | Pitted contact o failed relé |
| bus DC | Bus rises to expected level para the selected mode | Bridge, capacitor, elevador/doblador path o relé falla |
Notas de reparación
- Use a limitador de corriente para first potencia-up after entrada-etapa repair.
- Comprobación bus capacitores y discharge resistencias before testing live voltage.
- Do not force the relé without understanding whether the placa is in 220V o 380V mode.