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F-90

F-90

TROUBLESHOOTING & REPAIR

CURRENT TRANSDUCER REMOVAL AND REPLACEMENT (continued)

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11.The back of the machine may now gently be pulled away to gain access to the current trans- ducer. Note: The rear of the machine cannot be removed completely.

12.Carefully swing the rear of the machine open to the left while facing the rear of the machine.

13.Perform the Snubber Board Removal Procedure.

14.Remove leads #X2 and #20 from the output diode module.

15.Remove leads #X4 and #40 from the other output diode module.

16.Using a 3/8” wrench, remove the three mounting screws from the output diode heatsink assembly. Take note placement of insulation for reassembly. See Figure F.42.

17.Cut any necessary cable ties and carefully remove the heavy lead from the diode heatsink using a 1/2” nut driver.

18.Remove the output diode heatsink assembly through the rear of the machine.

19.Remove plug #J90 from the current transducer.

20.Using a 3/8” nut driver, remove the two mounting nuts from the current transducer.

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FIGURE F.42– OUTPUT HEATSINK MOUNTING SCREW LOCATION

3/8"

MOUNTING

BOLTS

V350-PRO

Page 140
Image 140
Lincoln Electric SVM158-A service manual Mounting Bolts