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TROUBLESHOOTING AND REPAIR
CURRENT TRANSDUCER TEST (continued)
F-40 F-40
POWER WAVE 355/405
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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.
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.
FIGURE F.12 Metal Plate Removal & Plug J8 Location
802
801
804
806
Plug J8
FIGURE F.13. Plug J8 Viewed From Lead Side of Plug
WARN ING
REMO TE
POWE R
OFF
ON
Plug J8
STATUS
THERMAL
LINCOLN
ELECTRIC