TIG200PACDC Parts Substitution Card

This is the quick external-parts substitution card for the highest-value TIG200PACDC torch, gas, and pedal-branch splits.

Use This Card When

Complaint branch	Swap first	If the complaint follows the part...	If the complaint stays with the machine...
DC TIG start complaint	known-good torch and front-end consumables	keep diagnosis in the torch branch	move to gas and control-state logic
shielding-flow complaint	known-good regulator and hose path	keep diagnosis in the gas branch	move deeper only if shielding is proven
pedal-only complaint	known-good pedal branch after proving local control with the remote isolated	keep diagnosis external	stop before control-board blame
DC healthy but AC still bad	hold external parts steady while comparing modes	keep diagnosis in AC-mode logic	move deeper only after the external path is clean

Stop if the complaint follows one pedal only.
Stop if gas correction restores the machine.
Stop if local control is healthy with the remote isolated and only the pedal branch still fails.
Stop using the card and open the full guide if torch, gas, and pedal branches are already proven clean.