Power Conversion Assembly Voltage Tests - Lincoln Electric POWER WAVE S500 Service Manual

F-37
POWER CONVERSION ASSEMBLY TEST (continued)
TABLE F.13 – POWER CONVERSION ASSEMBLY VOLTAGE TESTS
DESCRIPTION
INPUT TO TOP
BUCK/BOOST
CIRCUIT
INPUT TO BOTTOM
BUCK/BOOST
CIRCUIT
OUTPUT OF
BUCK/BOOST
CIRCUITS
SUPPLY FOR THE
TOP BUCK/BOOST
LEM
SUPPLY FOR THE
TOP BUCK/BOOST
LEM
SUPPLY FOR THE
BOTTOM BUCK /
BOOST LEM
SUPPLY FOR THE
BOTTOM BUCK /
BOOST LEM
SUPPLY FOR THE
DC BUS BOARD
TROUBLESHOOTING AND REPAIR
TEST POINT TEST POINT
B29(+)
B17(+)
J33 PIN 1 (+) J33 PIN 10 (–)
J33 PIN 6 (+) J33 PIN 10 (–)
J33 PIN 14 (+) J33 PIN 10 (–)
J34 PIN 13 (+) J33 PIN 10 (–)
J34 PIN 4 (+) J33 PIN 10 (–)
J37 PIN 4 (+) J37 PIN 9 (–)
POWER WAVE
EXPECTED
READING
B28(–) 635VDC
B18(–) 635VDC
402VDC
+15VDC
–15VDC
+15VDC
–15VDC
+48VDC
® S500
F-37
CONDITIONS
472VAC INPUT AND
MACHINE "ON"
472VAC INPUT AND
MACHINE "ON"
472VAC INPUT AND
MACHINE "ON"
472VAC INPUT AND
MACHINE "ON"
472VAC INPUT AND
MACHINE "ON"
472VAC INPUT AND
MACHINE "ON"
472VAC INPUT AND
MACHINE "ON"
472VAC INPUT AND
MACHINE "ON"