Lincoln Electric 11694 Service Manual page 44

®
POWER WAVE S350
DESCRIPTION
PRE-CHARGE RELAY COIL
VOLTAGE
400 VDC FROM BUCK/BOOST
AND DC LINK CAPACITOR
48 VAC FROM THE PLANAR
TRANSFORMER WINDING
100 VAC FROM PLANAR
TRANSFORMER WINDING
100 VDC FROM OUTPUT
RECTIFIER
SWITCH BOARD TEST
Table F.6 – Switch board voltage measurements
TEST POINTS
PLUG J41 PIN 6 (-)
TO
PLUG J41 PIN 5 (+)
B48 (+)
TO
B49 (-)
B7 TO B9
ALSO
B7 TO B8
B38
TO
B40
B52 (-)
TO
B51 (+)
TROUBLESHOOTING AND REPAIR
(continued)
EXPECTED READING
15 VDC
400 VDC
50 VAC
100 VAC
100 VDC
CONDITIONS
CORRECT INPUT POWER APPLIED
TO MACHINE AND PRE-CHARGE
COMPLETED. IF NOT CORRECT
PERFORM THE POWER FACTOR
CORRECTION CONTROL BOARD
TEST. SEE WIRING DIAGRAM.
CORRECT INPUT POWER APPLIED
TO MACHINE AND PRE-CHARGE
COMPLETED. IF NOT CORRECT
PERFORM THE INPUT
RECTIFIER TEST.
CORRECT INPUT POWER APPLIED
TO MACHINE AND PRE-CHARGE
COMPLETED. IF NOT CORRECT
PERFORM THE PLANAR
TRANSFORMER TEST.
CORRECT INPUT POWER APPLIED
TO MACHINE AND PRE-CHARGE
COMPLETED. IF NOT CORRECT
PERFORM THE PLANAR
TRANSFORMER TEST.
CORRECT INPUT POWER APPLIED
TO MACHINE AND PRE-CHARGE
COMPLETED. IF NOT CORRECT
PERFORM THE OUTPUT
RECTIFIER TEST.
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