Lincoln Electric POWER WAVE 355/405 SVM159-A - Manual (Page 70)

TROUBLESHOOTING & REPAIR
F-28 F-28
POWER WAVE 355/405 Retur
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DC BUS BOARD
W AR NIN G
RE M OT E
PO W ER
OF F
ON
STATUS
THERMAL
LINCOLN
ELECTRIC
FIGURE F.5 – DC BUS POWER SUPPLY POWER SUPPLY PC BOARD
FIGURE F.6 – DC BUS POWER SUPPLY POWER SUPPLY PC BOARD
DC BUS BOARD TEST (CONTINUED)
TEST PROCEDURE
1. Remove input power to the machine.
2. Using the 3/8” nut driver, remove the wrap-
around cover.
3. Locate the DC Bus Board. See Figure F.5.
4. Carefully apply input power to the Power
Wave 355/405.
ELECTRIC SHOCK can kill.
High voltage is present when
input power is applied to the
machine.
5. Turn on the Power Wave 355/405. The LED
on the DC Bus Power Supply PC Board
should light.
WARNING
J46
J47
475
52
51
477
66 65
L1
1078-1
J46
J47
Thermostat
Bus
Rectifier