Models
Welder Model Index
Model-family index for ZX7, ARC, MMA, NBC/NB MIG, LGK plasma, TIG/WS/WSME and dual-voltage inverter welders.
Records
- ZX7-400 inverter welder platform — A common Chinese/OEM inverter MMA welder platform with MOSFET or IGBT power-stage variants and many shared control-board patterns.
- ZX7 MMA inverter welders — ZX7 is a major Chinese/OEM MMA inverter welder platform family used in many board-level repair cases.
- Generic ARC / MMA welders — Generic ARC and MMA inverter welders are often white-label machines sharing common control and power-stage layouts.
- NBC / NB MIG welders — NBC and NB MIG/CO2 welders are important for wire-feed boards, trigger circuits, gas-valve control and IGBT driver diagnosis.
- LGK plasma cutters — LGK plasma cutters are important for pilot arc, HF start, gas pressure, arc-transfer and UC3846 control-board diagnosis.
- TIG / WS / WSM / WSME welders — TIG and WS/WSM/WSME inverter welders are important for high-frequency start, gas control and AC/DC TIG switching faults.
- Dual-voltage 220V/380V welders — Dual-voltage inverter welders are important for voltage detection, doubler/boost circuits, relay switching and wrong-voltage faults.
- MZ submerged arc welders — MZ submerged arc welders are a later expansion area for industrial welding-machine repair data.
- Keyue ZX7-250 — ZX7-250 MMA inverter welder service-manual source for internal structure, MOSFET testing, rectifier testing and fault diagnosis.
- Puner LG-100 Plasma Cutter — Plasma cutter platform relevant to pilot arc, high-frequency start, gas valve and arc-transfer control diagnosis.
- ZX7-250 lesson-based repair notes — H7B short, lamp limiter, ±25V rails and driver diagnosis.
- ZX7-250 complete repair workflow — full diagnostic cluster from input short to real output current.
How to use this section
Model pages are hubs. They explain machine architecture and then point to board-level diagnosis.