Lincoln Electric MULTI-WELD SVM151-A Service Manual page 65

F-25
DC BUSS POWER SUPPLY PC BOARD TEST(CONTINUED)
8. Check the DC Buss Power Supply PC
Board input and output voltages according
to Table F.2.
Wiring Diagram.
9. If all the voltages are correct, the DC Buss
Power Supply PC Board is operating prop-
erly.
10. If any of the output voltages are not correct
and the input voltage is correct, the DC
Buss Supply Board may be faulty.
Positive Meter Probe
Test Point
Plug P46 – Pin 1
Plug P47 – Pin 7
Plug P47 – Pin 8
Plug P47 – Pin 4
12. If finished testing, perform the Case Cover
Replacement procedure.
TROUBLESHOOTING & REPAIR
See Figure F.5 and the
TABLE F.2
DC BUSS POWER SUPPLY PC BOARD VOLTAGE TABLE
Negative Meter Probe
Test Point
Plug P46 – Pin 3
Plug P47 – Pin 1
Plug P47 – Pin 6
Plug P47 – Pin 6
MULTI-WELD 350
11. If the input voltage is not correct, check
leads #401A, #402, #302, #202, #231 and
the On/Off mode switch (SW1). See the
Wiring Diagram.
NOTE: The input voltage to the DC Buss Power
Supply PC Board should be the same as the
input voltage applied to the Multi-Weld 350.
Acceptable Voltage
Reading
Should be same as input
50 – 113 VDC
voltage supplied to
Multi-Weld 350
Supply to Analog Control
38.0 – 42.0 VDC
Power Supply PC Board
Supply for Fan and Input
38.0 – 42.0 VDC
Contactor
Output to Peripheral
38.0 – 42.0 VDC
Board
F-25
Conditions/Comments