Lincoln Electric INVERTEC SVM199-A - Manual (Page 80)

J42 J41 J43 4 5 6 3 4 7 8 9 10 11 12 J42 J41 J43 1 2 3 1 2 1 2 3 4 5 6
J42 J41 J43
4 5 6 3 4 7 8 9 10 11 12
J42 J41 J43
1 2 3 1 2 1 2 3 4 5 6
POWER BOARD TEST (continued)
TROUBLESHOOTING AND REPAIR F-40 F-40
INVERTEC® V450-PRO
PROCEDURE
1. Remove input power to the INVERTEC® V-450
PRO.
2. Using the 3/8” nut driver, remove the case top.
3. Perform the Capacitor Discharge Procedure.
4. Locate the Power Board and plugs J42 and
J43. Do not remove plugs or leads from the
Power Board. See Figure F.9.
5. Carefully apply input power to the INVERTEC®
V-450 PRO.
ELECTRIC SHOCK can kill.
High voltage is present when input
power is applied to the machine.
6. Turn on the INVERTEC® V-450 PRO. Carefully
test for the correct voltages at the Power Board
according to Table F.4.
7. If either of the 40 VDC voltages is low or not
present at plug J41, check capacitor C3 and the
rectifier bridge. See the Wiring Diagram. Also
perform the T1 Auxiliary Transformer Test.
8. If any of the DC voltages are low or not present
at plugs J42 and/or 43, the Power Board may
be faulty.
9. Install the case top using the 3/8” nut driver. WARNING
FIGURE F.9 – POWER BOARD
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