Lincoln Electric POWER WAVE 355/405 SVM159-A Service Manual page 82

F-40
CURRENT TRANSDUCER TEST (continued)
TEST PROCEDURE
1. Remove input power to the POWER WAVE
355/405.
2. Using the 5/16" nut driver, remove the case
wraparound cover.
3. Perform the Input Capacitor Discharge
Procedure.
4. Locate plug J8 on the control board. Do not
remove the plug from the P.C. Board.
5. Apply the correct input power to the POWER
WAVE 355/405.
TROUBLESHOOTING AND REPAIR
FIGURE F.12 Metal Plate Removal & Plug J8 Location
S T
A T
U S
T H
E R
M A
L
W A
R N
IN
G
R EM
O TE
PO
W
ER
O N
O FF
FIGURE F.13. Plug J8 Viewed From Lead Side of Plug
802
801
806
POWER WAVE 355/405
Plug J8
6. Check for the correct DC supply voltages to
the current transducer at plug J8. See Figure
F.12.
A. Pin 2 (lead 802+) to pin 6 (lead 806-)
should read +15 VDC.
B. Pin 4 (lead 804+) to pin 6 (lead 806-)
should read -15 VDC.
7. If either of the supply voltages are low or miss-
ing, the control board may be faulty.
804
Plug J8
F-40