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F-21

F-21

 

TROUBLESHOOTING & REPAIR

ANALOG CONTROL POWER SUPPLY PC BOARD TEST (CONTINUED)

FIGURE F.4 – ANALOG CONTROL POWER SUPPLY PC BOARD

P41

 

 

P42

 

P42

1

2

1

2

3

4

5

P41

3 4 6 7 8 9 10

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AMPS

 

 

 

 

A

 

 

 

 

LINCOLN

 

 

 

VOLTS

 

 

V

 

ELECTRIC

 

 

 

 

MULTI-

 

 

 

 

WELD

350

 

 

 

 

INPUT

 

 

 

 

CHOPPER

T

ECHNOLOGY

 

 

 

 

 

 

 

WORK

 

ELECTRODE

ANALOG CONTROL POWER SUPPLY PC BOARD

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TEST PROCEDURE

1.Set the CC/CV power switch to OFF.

2.Remove input power to the machine.

WARNING

ELECTRIC SHOCK can kill.

Disconnect input power before removing the case cover and performing tests or making repairs to the machine.

3.Perform the Case Cover Removal proce- dure.

4.Perform the Power Module Capacitor Discharge procedure.

5.Locate the Analog Control Power Supply PC Board and plugs P41 and P42. See Figure F.4.

6.Carefully apply the correct input power to the Multi-Weld 350 (50 – 113 VDC).

7.Set the Multi-Weld 350 to either CC or CV mode. Make sure the input contactor acti- vates. If it does not, increase the input volt- age but do not exceed 113 VDC. The LED on the DC Buss Power Supply PC Board should light.

8.Check the Analog Control Power Supply PC Board input and output voltages according to Table F.1. See Figure F.4 and the Wiring Diagram.

MULTI-WELD 350

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Lincoln Electric SVM151-A service manual Test Procedure, Figure F.4 Analog Control Power Supply PC Board