Lincoln Electric POWER WAVE C300 Service Manual page 79

F-60
PLANAR TRANSFORMER RESISTANCE TEST PROCEDURE (continued)
B51
B53
B40
B39
B38
B28
B29
B37
B41
PROCEDURE
1. Disconnect the input power to the POWER
WAVE® C300 machine.
2. To gain access to the Planar Transformer test
points first perform the Case Cover and DC
Link Capacitor Discharge Procedure.
3. See Figure F.21 for test point locations.
4. Using the Ohmmeter check the resistances per
Table F.12.
5. If the resistances are correct per Table F.12
then the Planar Transformer is OK.
6. Replace the Case Cover.
TROUBLESHOOTING AND REPAIR
FIGURE F.21 - TEST POINTS
POWER WAVE® C300
F-60
INVERTER
CHOKE
B9
B7
B8