Lincoln Electric POWER WAVE 355/405 SVM159-A Service Manual page 70

F-28
FIGURE F.5 – DC BUS POWER SUPPLY POWER SUPPLY PC BOARD
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.
FIGURE F.6 – DC BUS POWER SUPPLY POWER SUPPLY PC BOARD
J47
475
52
J46
66
TROUBLESHOOTING & REPAIR
DC BUS BOARD TEST (CONTINUED)
DC BUS BOARD
S T
A T
U S
T H
E R
M A
L
W AR
NI
NG
RE
MO
TE
PO
W
ER
ON
OF
F
51
477
65
POWER WAVE 355/405
WARNING
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.
J47
Bus
Rectifier
J46
F-28
Thermostat