Diode Tests - Lincoln Electric POWER WAVE S500 Service Manual

F-33
POWER CONVERSION ASSEMBLY TEST (continued)
NOTE: Make sure the input power is removed from the Power Wave
terminal B56 and electrically isolated from each other. See Figure F.11. When test is complete recon-
nect the three leads to terminal B56.
TEST DESCRIPTION
SIDE A BUCK IGBT
SIDE A BOOST IGBT
SIDE A HIGH
SPEED H-BRIDGE
SIDE B BUCK IGBT
SIDE B BOOST IGBT
SIDE B HIGH
SPEED H-BRIDGE
OUTPUT RECTIFIER
TROUBLESHOOTING AND REPAIR
TABLE F.11 – DIODE TESTS
POSITIVE METER LEAD NEGATIVE METER LEAD
B13
B28
B16
B5
B28
B28
B7
B18
B4
B15
B18
B18
B11
B12
B9
B10
POWER WAVE
S500 and the three leads are removed from
®
B29
B8
B58
B58
B16
B5
B17
B6
B58
B58
B4
B15
B57
B57
B57
B57
® S500
F-33
MEASURED LEAD
0.395 (+/– 10%)
0.395 (+/– 10%)
0.395 (+/– 10%)
0.395 (+/– 10%)
0.395 (+/– 10%)
0.395 (+/– 10%)
0.395 (+/– 10%)
0.395 (+/– 10%)
0.395 (+/– 10%)
0.395 (+/– 10%)
0.395 (+/– 10%)
0.395 (+/– 10%)
0.335 (+/– 10%)
0.335 (+/– 10%)
0.335 (+/– 10%)
0.335 (+/– 10%)