DC bus capacitors, 24 V socket, power relay, start resistor, demagnetizing resistor and silicon bridge socket.
Model hub
ZX7-160/200 Small Inverter Stick Welder Repair Hub
A model-level service hub for compact ZX7-160/200 inverter MMA welders, focused on board-stack function and first diagnostic split.
Quick Answer
ZX7-160/200 small inverter stick welders are useful as a compact board-stack example: bottom board supply/DC bus layer, middle board transformer-output-feedback layer, and top inverter/driver layer.
- Use the model hub when the machine is a small ZX7-style MMA inverter rather than a large 380 V module machine.
- Start by deciding whether the symptom belongs to control power, inverter switching, output rectification or feedback/protection.
- The board-stack reference is the main next step when the physical board position is known but the function is unclear.
ZX7-160/200 board-stack overview
Three-layer service split for small inverter stick welders.
Main transformer, reactor, shunt, output rectifier diodes, thermal switch and feedback wire socket.
MOSFET / field-effect tube area, driver transformer, control module, power indicator and board supply.
Open related pages
Use these pages after identifying the board layer.