See figure f.33, J3 pin 15 to j3 pin 6. see figure f.33, Troubleshooting & repair – Lincoln Electric COMMANDER SVM145-B User Manual

Page 125: Feedback input test (continued), Plug j2 pin 5 pin 2 pin 1

TROUBLESHOOTING & REPAIR

F-69

COMMANDER 300

Retur

FEEDBACK INPUT TEST

(continued)

FIGURE F.33. – Plug J2 & J3

Plug J2

Pin 5

Pin 2

Pin 1

6. If the continuity is not present, check the 67

lead for poor connection. See the Wiring
Diagram. Look closely for broken molex pins.

7. Plug J3 back into the control PC board.

8. If all continuity checks in this section are ok but

the voltage checks from the previous section
are off, replace the control board.

Replacement Procedure, install the control
panel and side panels on the machine.

Pin 6

Plug J3

Pin 15

Pin 2