A100 Parts Substitution Card

This is the quick external-parts substitution card for the highest-value A100 clamp, holder, and utility-path splits.

Use This Card When

arc is weak but the machine is not clearly dead
the complaint changes with clamp or holder quality
branch-power quality may still be muddying the diagnosis
the machine was recently rewired or the leads were swapped

Stage First

known-good heavy-duty clamp
known-good holder branch
dry 3/32 in 7018 or 6010/6011 class rod
stable 20 A wall outlet or healthy 3 kW generator baseline with no weak extension cord

Fast Substitution Card

Complaint branch	Swap first	If the complaint follows the part...	If the complaint stays with the machine...
weak arc or hard start	known-good clamp and holder	keep diagnosis in the current path	move to OCV and support logic
complaint changes with outlet quality	stable utility source	keep diagnosis in the utility path	move deeper only if stable power still fails
complaint starts after lead service or setup change	correct DCEN / DCEP lead placement for the actual rod test	keep diagnosis in setup and external current path	move deeper only if the arc is still wrong with correct polarity
blinking-light collapse with healthy externals	keep external parts fixed and retest	keep diagnosis in support-power or fan branch	move deeper only after the external path is clean
no output with otherwise healthy setup	hold known-good current path steady	keep diagnosis external if the complaint follows the lead set	move to output or IGBT branch only after external proof

Official Ordering Shortcuts

A100 accessories path: official A100 accessories path
Stock holder KAA20010: official product page
Heavy-duty holder 07000460: official product page
Heavy-duty clamp 07000461: official product page

Stop Rules

Stop if clamp or holder substitution fixes the complaint.
Stop if stable utility power removes the failure.
Stop if correct polarity and dry 3/32 in proof rod remove the complaint.
Stop if the machine is being evaluated as TIG, because A100 is officially stick-only.
Stop using the card and open the full guide if current path, utility path, and support behavior are already proven clean.

Open Next