Lincoln Electric INVERTEC V300-PRO SVM105-B Service Manual page 66

F-36
OVERCURRENT PROTECTION CURRENT TRIGGER TEST (cont.)
TEST PROCEDURE
1. Perform Input Filter
Procedure detailed in this section.
2. Remove front panel from machine to access Control
Board.
3. Arrange wires so there is ample room to work on
the board.
J5
TROUBLESHOOTING & REPAIR
FIGURE F.12 - GETTING ACCESS TO CONTROL BOARD
Capacitor Discharge
FIGURE F.13 - CONTROL BOARD TEST POINTS
CONTROL
G2527
V300-PRO
4. Turn main power ON.
5. Test for 15 VDC between leads 302 and 275D.
a. If 15 VDC is present, test is OK. Go to step 6.
b. If 15 VDC is not present, check Power Board
and leads 302 and 275D for continuity and wire
breakage.
302
J1 J2
J4
275D
F-36
J3