Brand
Longtai / Leishen / Qingdao-style boards
OEM board families used in many Chinese ZX7 and inverter welder repair cases.
Brand/platform role
Longtai / Leishen / Qingdao-style boards is treated as a platform reference. Many inverter welders are sold under different labels but share board families, chips and fault patterns.
Why it matters
OEM board families used in many Chinese ZX7 and inverter welder repair cases.
Repair-data focus
- Identify model families and board families.
- Map common chips and control boards.
- Connect fault symptoms to repair cases.
- Avoid relying only on brand labels when OEM boards are shared.
Typical diagnostic path
Brand / platform name
↓
Model family
↓
Board family
↓
Chip and circuit function
↓
Fault symptom
↓
Repair case