Lincoln Electric POWER WAVE SVM156-A Service Manual page 58

F-12
TEST PROCEDURE
1. Remove input power to the Power Wave
455/R.
2. Using the 3/8" nut driver, remove the case
top and sides.
3. Perform
Procedure.
4. Locate label and remove leads 19C and 19D
from the reconnect switches with the 3/8"
wrench. Note lead placement for reassem-
bly. Clear leads. Refer to Figure F.2.
TROUBLESHOOTING & REPAIR
SWITCH BOARD TEST (CONTINUED)
FIGURE F.2 – RECONNECT SWITCHES
the Capacitor Discharge
POWER WAVE 455/R
19C
5. Using the Analog ohmmeter, perform the
resistance tests detailed in Table F.1. Refer
to Figure F.3 for the test points.
6. If any test fails replace both switch boards.
See Switch Board
Replacement.
7. If the switch board resistance tests are OK,
check the molex pin connections and asso-
ciated wiring from the switch boards to the
control board. See the Wiring Diagram.
F-12
19D
RECONNECT
SWITCHES
Removal and