Lincoln Electric INVERTEC V300-PRO SVM105-B - Manual (Page 66)

V300-PRO
TROUBLESHOOTING & REPAIR
TEST PROCEDURE
1. Perform Input Filter Capacitor Discharge
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.
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.
F-36 F-36
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OVERCURRENT PROTECTION CURRENT TRIGGER TEST (cont.)
FIGURE F.12 - GETTING ACCESS TO CONTROL BOARD
G2527 CONTROL
302
275D
J5 J1 J2 J4 J3
FIGURE F.13 - CONTROL BOARD TEST POINTS