Lincoln Electric INVERTEC V250-S - Manual (Page 52)

F-20 TROUBLESHOOTING & REPAIR F-20
TEST DESCRIPTION
1. Remove main input power to the
V250 -S.
2. Perform Filter Capacitor Discharge
Procedure detailed in Maintenance
Section.
3. Locate the Power Board and associ-
ated lead locations. See Figure F.3.
4. Carefully remove main transformer
primary leads #201, #204, #205 and
#208 from the power board.
5. Use the analog ohmmeter to perform
the tests outlined in Table F.3. See
power board schematic.
POWER BOARD RESISTANCE TEST (continued)
INVERTEC V250-S
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V250S POWER G2684
DANGER
HIGH VOLTAGE CAN KILL
204
201
209
208
205
207A
202A
203A
206
+
+
Figure F.3 Power Board Test Points.