Lincoln Electric SVM 106-A service manual Control PC Board Replacement

Models: SVM 106-A

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F-30

TROUBLESHOOTING AND REPAIR

CONTROL PC BOARD REPLACEMENT (continued)

FIGURE F.8 – DISCONNECTING THE CONTROL PC BOARD.

LN-7 GMA CONTROL

 

 

 

 

32A

7

 

526

527

J102

 

 

508

509

J104

 

 

 

 

 

 

 

 

 

 

J101

J103

 

 

 

 

 

539

541

 

 

 

 

 

 

 

 

12345678

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REPAIR PROCEDURE

1.Observe static precautions detailed in PC Board Troubleshooting Procedures at the beginning of this section.

2.Remove the cover from the control box by removing the four 5/16 in. screws from the top and side of the unit.

3.Disconnect J102, input cable connector J101, and transformer connector J103 from the PC board. Refer to Figure F.8.

4.If the unit is equipped with a timer or burnback kit, disconnect J104 From the PC board.

5.Disconnect GLP reed switch wires from PC board terminals #526 and #527.

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CAUTION

Label all wires and connectors prior to removal. All wires and connectors must be reconnected to the same terminals from which they were removed. Improper connection may lead to component damage or machine misoperation.

6.Disconnect feed wire motor leads from PC board terminals #539 and #541.

7.Disconnect the gas solenoid wires from PC board terminals #7 and #32A.

8.Disconnect meter kit wires from PC board terminals #508 and #509.

LN-7 GMA WIRE FEEDER

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Image 94
Lincoln Electric SVM 106-A service manual Control PC Board Replacement, Figure F.8 Disconnecting the Control PC Board