Troubleshooting and repair – Lincoln Electric POWER MIG SVM170-A User Manual
Page 56
Advertising
F-16
TROUBLESHOOTING AND REPAIR
F-16
POWER MIG 255C
Leads #208, #209, and #354 are con-
nected to the rectifier diode bridge (D2).
See Figure F.2. Lead #206 is connect-
ed at the output shunt. See the wiring
diagram.
5. Connect main input power to the
machine.
TEST PROCEDURE
1. Disconnect the main AC input power to
the machine.
2. Remove the case top and side panels
with a 3/8 in. nutdriver.
3. Perform the Main Transformer Test to
ensure the proper voltages are supplied
to the J5 plug on the Control board.
4. Locate the following leads:
RECTIFIER DIODE BRIDGE TESTING (continued)
LEAD
208
209
354
206
FIGURE F.2 — G3521 RECTIFIER DIODE BRIDGE LOCATION.
RECTIFIER
DIODE BRIDGE
(D2)
Advertising