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F-42

F-42

TROUBLESHOOTING AND REPAIR

FAN CONTROL AND MOTOR TEST (continued)

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TEST PROCEDURE

1.Remove the input power to the V350-PRO machine.

2.Using the 5/16” nut driver, remove the case wraparound cover.

3.Perform the Input Filter Capacitor Discharge

Procedure.

4.Locate plug J22 on the main switch board. Do not remove the plug from the board. See Figure F.12.

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FIGURE F.12 PLUG J22 LOCATION

J22

J21

J20

5. Carefully apply the correct input power to the

6. Carefully check for 115VAC at plug J22 pin-2

machine.

to J22 pin-3. (leads 32A to 31B(C) See Figure

 

F.13. WARNING: HIGH VOLTAGE IS PRE-

 

SENT AT THE MAIN SWITCH BOARD.

FIGURE F.13 PLUG J22

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Fan Lead Lead 31B(C)

1

3

2 Lead 32A

4

Fan Lead

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Plug J22

V350-PRO

Page 92
Image 92
Lincoln Electric SVM158-A service manual FAN Control and Motor Test, Perform the Input Filter Capacitor Discharge Procedure