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Troubleshooting & repair, Input board removal and replacement procedure – Lincoln Electric V155-S User Manual

Page 58

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DC+

DC-

INPUT BOARD

AC2

AC1

MOUNTING SCREWS

FIGURE F.11 – SCREW AND LEAD LOCATION

INPUT BOARD REMOVAL AND REPLACEMENT PROCEDURE

PROCEDURE

1. Disconnect power to the INVERTEC® V155-S.
2. Perform the Case Cover Removal Procedure

(Left side only).

3. Perform the Input Filter Capacitor Discharge

Procedure.

4. Label and disconnect the four leads at the Power

Switch located on the case back.

5. Using a 7mm nutdriver, remove the four input board

mounting screws. This will allow the board to be

gently pulled forward to gain access to associated

leads and plugs. See Figure F.11.

.
6. Label and remove all associated leads and plugs.

Some leads will require a 7mm nutdriver for

removal

7. Remove and replace the Input board.
8. Connect all leads and plugs previosly removed
9. Replace the four mounting screws previously

removed.

10. Replace the case cover.

TROUBLESHOOTING & REPAIR

F-26

F-26

INVERTEC® V155-S

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