Lincoln Electric 11519 Service Manual page 66

F-20
STATIC SCR RECTIFIER ASSEMBLY TEST (continued)
FIGURE F.3 — REMOVE PLUGS J6 AND J5 TO PERFORM STATIC RECTIFIER ASSEMBLY TEST
PROCEDURE
1. Disconnect main AC input power to the
machine.
2. Remove the case top and side panels with a 3/8
in. nutdriver.
3. Remove the tool tray with a 5/16 in. nutdriver.
4. Verify that the capacitors have completely dis-
charged with a volt-ohmmeter.
5. Disconnect plugs J6 and J5 from the control
board . This electrically isolates the SCR bridge
assembly. See Figure F.3.
TROUBLESHOOTING AND REPAIR
Power MIG® 255XT
J6
J5
J8
J1
J4
J3
J2
F-20