| Utility path, branch quality, and current return |
weak arc, bad arc blow, hard start with normal OCV, machine acts better on another outlet, plug or clamp heating |
A100, A220, MA200TS |
workbook sheets A100, A220, and MA200TS, plus owner manuals for fitted input expectations |
for A100, prove real 120 V / 20 A or a healthy 3 kW generator path first; for A220, prove real 208/230 V and ideally 50 A or a healthy 5 kW generator path first; then prove clamp bite, hot current-path hardware, and correct DCEN / DCEP before internal repair; then move into the A100 router or A220 router |
| Support power, startup collapse, and fan-related branch |
one-second power-up then shutdown, blinking power light, fan oddities, machine wakes and collapses |
A100, MA200TS, P40 |
MA200TS_Service_manual.pdf, B.067RM.419-C_main.pdf, workbook sheets A100, MA200TS, and P40 |
wall outlet quality, switch path, fan branch, and support supply before condemning the main inverter; then move into the A100 board opening map when the complaint stays internal |
| Display, control, and feedback branch |
display pegged at max, wrong A or V reading, strange panel behavior, feed and display faults together, process button trouble |
M185, MA200TS |
MA200TS_Service_manual.pdf, local MA200TS panel photos, workbook sheets M185 and MA200TS |
whether welding still works with bad display, whether preset-versus-actual display behavior is wrong, and whether the fault follows the display or feedback branch rather than the power stage |
| Wire-feed, trigger, and torch-front-end branch |
no wire feed, wire feeds at power-up, poor arc at higher wire-speed settings, breaker trip, front-end misassembly, birdnest |
F130, M185, MA200TS |
B.067RM.600-C.pdf, B.067RM.601-D.pdf, local MIG workbook sheets, and multiprocess service notes |
bare-wire feed with tip removed, trigger path, drive pressure, correct torch-front-end assembly, and for F130 the correct 0.035 in baseline or proper 0.030 in conversion |
| MIG-only versus shared power-source branch |
stick works but MIG does not, one process healthy while another is dead, shared machine blamed too early |
MA200TS, M185, F130 |
workbook sheets MA200TS, M185, and F130 |
one healthy baseline process first, then retest the failing branch; for M185 prove real 208/230 V source and sane inductance first, and for F130 prove real 120 V / 20 A or 3 kW source first |
| Plasma HF, control, and torch-stack branch |
no HF, HF but no OCV, air but no cut, pilot without transfer, fan-voltage drift, blocked orifice |
P40 |
B.067RM.418-C_HF.pdf, B.067RM.410-C_control.pdf, B.067RM.419-C_main.pdf, P40_parts_breakdown.pdf, and local P40 reference images |
1.5 mm HF gap, 24 V support to HF board, fresh SG55 stack, clean clamp, and dry air under flow |
| Package, accessory, and kit branch |
aluminum complaints on multiprocess unit, TIG branch weirdness, wrong package installed, post-service fitment problems |
MA200TS, P40, A220 |
P40_parts_breakdown.pdf, local multiprocess workbook sheets, and the A220 workbook sheet |
exact fitted kit, torch, clamp, lead, and regulator package before electronics diagnosis; for A100 and A220, stop if the complaint is really improvised TIG use because that is not a supported process path |