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TROUBLESHOOTING & REPAIR
F-22 F-22
MULTI-WELD 350
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TABLE F.1
ANALOG CONTROL POWER SUPPLY PC BOARD VOLTAGE TABLE
Positive Meter Probe Negative Meter Probe Acceptable Voltage
Conditions/Comments
Test Point 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.