To table f.1, Troubleshooting & repair – Lincoln Electric MULTI-WELD SVM151-A User Manual

Page 62

TROUBLESHOOTING & REPAIR

F-22

MULTI-WELD 350

TABLE F.1

ANALOG CONTROL POWER SUPPLY PC BOARD VOLTAGE TABLE

Positive Meter Probe

Negative Meter Probe

Acceptable Voltage

Conditions/Comments

Test Point

Reading

Plug P41 – Pin 1

Plug P41 – Pin 2

38.0 – 42.0 VDC

Supply from DC Buss
Power Supply Board

Plug P42 – Pin 1

Plug P42 – Pin 6

18.0 – 21.0 VDC

Supply for right side
Chopper PC Board

Plug P42 – Pin 3

Plug P42 – Pin 8

18.0 – 21.0 VDC

Supply for left side
Chopper PC Board

Plug P42 – Pin 10

Plug P42 – Pin 4

14.0 – 16.0 VDC

+15 VDC Supply to
Peripheral Board

Plug P42 – Pin 5

Plug P42 – Pin 7

14.0 – 16.0 VDC

+15 VDC Supply to
Weld Control Board

Plug P42 – Pin 2

Plug P42 – Pin 7

4.5 – 5.5 VDC

+5 VDC Supply to
Weld Control Board

Plug P42 – Pin 9

Plug P42 – Pin 7

-14.0 – 16.0 VDC

-15 VDC Supply to
Weld Control Board

ANALOG CONTROL POWER SUPPLY PC BOARD TEST (CONTINUED)

9. If all the voltages are correct, the Analog

Control Power Supply PC Board is operat-
ing properly.

10. If any of the output voltages are not correct

and the input voltage is correct, the Analog
Control Power Supply PC Board may be
faulty.

11. If the input voltage is not correct, check

leads #436, #437 and their associated
plugs for loose or faulty connections. See
the Wiring Diagram. Perform the DC Buss
Power Supply PC Board Test.

12. If finished testing, perform the Case Cover

Replacement procedure.