Troubleshooting & repair, Test procedure – Lincoln Electric PRO-CUT 55 SVM140-A User Manual
Page 56
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TROUBLESHOOTING & REPAIR
F-19
F-19
PRO-CUT 55
PRIMARY POWER BOARD RESISTANCE TEST AND
CAPACITOR VOLTAGE TEST (continued)
FIGURE F.3 – PRIMARY POWER BOARD REMOVAL
PRIMARY POWER
BOARD WITH
INPUT FILTER
CAPACITORS
+
+
CAPACITOR (C2)
TERMINALS
CAPACITOR (C1)
TERMINALS
PRO-CUT
POWER G3172-[ ]
207
202
206
203
201
204
205
208
TEST PROCEDURE
1.
Remove main input power to the Pro-Cut
55.
2. Perform the Input Filter Capacitor
Discharge Procedure detailed earlier in
this section.
3. Locate the primary power board and asso-
ciated lead locations. See Figure F.3.
4. Carefully remove the main transformer pri-
mary leads #201, #204, #205 and #208
from the power board.
5. Use the analog ohmmeter to perform the
test outlined in Table F.2.
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