Lincoln Electric POWER WAVE 355/405 SVM159-A Service Manual page 58

F-16
207
J21
TEST PROCEDURE
1. Remove input power to the POWER WAVE
355/405.
2. Using a 5/16" nut driver, remove the case
wraparound.
3. Perform the Input Filter Capacitor Discharge
Procedure detailed earlier in this section.
TROUBLESHOOTING & REPAIR
MAIN SWITCH BOARD TEST (continued)
FIGURE F.2 MAIN SWITCH BOARD LEAD LOCATIONS
- +
201
208
- +
203
POWER WAVE 355/405
202
- +
204
205
- +
206
4. Using a 7/16" wrench locate, label and remove
leads 201, 202, 203, 204, 205, 206, 207 and
208 from the switch board. Note lead and
washer placement for reassembly.
leads.
5. Using the Analog ohmmeter, perform the resis-
tance tests detailed in Table F.1. Refer to fig-
ure F.2 for test point locations. Note: Test
using an Analog ohmmeter on the Rx1 range.
Make sure the test probes are making electri-
cal contact with the conductor surfaces on the
PC board.
F-16
J22
209
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