Lincoln Electric 355M Manuel d'utilisateur télécharger pdf (Page 86)

TROUBLESHOOTING AND REPAIR

F-40 F-40

POWER WAVE 355M/405M

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TEST PROCEDURE

1. Remove input power to the POWER WAVE

355M/405M.

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 355M/405M.

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

Plug J8

ELEC

CURRENT TRANSDUCER TEST (continued)

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Lincoln Electric 355M Manuel d'utilisateur Page 86