Power Conversion Board Assembly Lead Locations - Lincoln Electric POWER WAVE S500 Service Manual

F-97
POWER CONVERSION BOARD ASSEMBLY
REMOVAL AND REPLACEMENT PROCEDURE (continued)
FIGURE F.38 – POWER CONVERSION BOARD ASSEMBLY LEAD LOCATIONS
MOUNTING
SCREWS
(5 PLACES)
J37
LEAD B2
B56
LEAD 901C
HEAT SINK
TERMINAL
LEAD 901A
J36
MOUNTING
STUD WITH
NUT AND
WASHER
(1 PLACE)
8. Using a 7/16" wrench, label and remove the top
choke leads from terminals B13 and B8. Save
the bolts and lock washers for reassembly. See
Figure F.38. See Wiring Diagram.
9. Using a 7/16" wrench, label and remove the
bottom choke leads from terminals B6 and B7.
Save the bolts and lock washers for reassem-
bly. See Figure F.38. See Wiring Diagram.
10. Using a 7/16" wrench, label and remove the
leads B4 and B5 from the buss bars. Save the
bolts, lock washers and nuts for reassembly.
See Figure F.38. See Wiring Diagram.
TROUBLESHOOTING AND REPAIR
J32
J32
R70
LED5
D15
C19
R31
DZ26
DZ24
R54
C11
B11 11
R55
OCI1
D1
R52
C18
C17
B56
R81
D11
R80
R79
D10
R78
B9
R65
D9
DZ13
DZ7
C5
J35
J35
POWER WAVE
J33
B28
J33 L3
LED4
LED3
FTP3
C10
DZ23
R34
R35
R1
R27
R3
B16
T4
R2
DZ3
T3
R61
D5
C38
DZ4
B5
X1
C21
C40
T5
L2
C33
L4
B7
B6 X2
C20
FTP1
R28
C36 DZ19
C2
R37
R9
R68
B4
C39
C3
C7
R21
R22
C8
D6
T2
DZ6
DZ16
DZ14
LED1
R42
R25
T1 DZ8
R26
T6
R24
R41 R23
J34
C34
J34
11. Using a 5/16" nutdriver, remove the five screws
securing the Power
Assembly to the frame of the machine. See
Figure F.38.
12. Using a 3/8" nutdriver, remove the nut and
washer from the mounting post Lower left hand
corner. See Figure F.38.
13. Clear all leads and carefully remove the Power
Conversion Power Board Assembly with heat
sink from the machine.
® S500
F-97
B13
LEAD B5
TO TOP
INPUT CHOKE
LEAD B4
B8
B7
TO BOTTOM
INPUT CHOKE
B6
Conversion Board