Switch Board Resistance Test - Lincoln Electric INVERTEC V350-PRO Service Manual

F-19
6. If any test fails replace the switch board. See
Main Switch Board Removal and Replacement.
7. If the switch board resistance tests are OK, check
connections on plugs J20, J21, J22 and all asso-
ciated wiring. See wiring diagram.
APPLY POSITIVE TEST
PROBE TO TERMINAL
+206
+208
+202
+201
+205
+203
+204
+207
TROUBLESHOOTING & REPAIR
MAIN SWITCH BOARD TEST (continued)
TABLE F.1. SWITCH BOARD RESISTANCE TEST
APPLY NEGATIVE TEST
PROBE TO TERMINAL
8. Reconnect leads 201, 202, 203, 204, 205, 206,
207, and 208 to the switch board. Ensure that the
leads are installed in their proper locations. Pre-
Torque all leads nuts to 25 inch lbs. before tight-
ening them to 44 inch lbs.
9. Replace the case wraparound cover using a 5/16"
nut driver.
-205
-203
-204
-207
-206
-208
-202
-201
V350-PRO
NORMAL
RESISTANCE READING
Greater than 1000 ohms
Greater than 1000 ohms
Greater than 1000 ohms
Greater than 1000 ohms
Less than 100 ohms
Less than 100 ohms
Less than 100 ohms
Less than 100 ohms
F-19