Lincoln Electric PRO-CUT 55 SVM140-A Service Manual page 62

F-25
OUTPUT POWER BOARD RESISTANCE TEST (continued)
FIGURE F.4 – OUTPUT POWER BOARD LEAD LOCATIONS
TEST PROCEDURE
1. Remove input power to the Pro-Cut 55
machine.
2. Perform the
Discharge Procedure detailed earlier in this
section.
3. Remove the torch assembly from the
machine.
TROUBLESHOOTING & REPAIR
X4
(B11)
G3326 - [ ] PRO-CUT 55 OUTPIUT
X2
(B12)
R5
Test
Point
(G3326-1)
(only)
Input Filter Capacitor
PRO-CUT 55
B21
D30 Test Point
J33
x40
B1
B2
x20
J31
J32
4. Remove leads X4, X2, B21, X20, X40 and
plugs J33 and J32 from the output power
board. See Figure F.4.
5. Using the analog ohmmeter, perform the
resistance checks per Table F.4.
F-25
(G3326-2,3)