Troubleshooting & repair, Warning – Lincoln Electric INVERTEC POWER WAVE 450 SVM112-B User Manual
Page 176
F-116
F-116
WIRE FEEDER 2 TRIGGER CIRCUIT TEST
(continued)
FIGURE F.41 - DISPLAY BOARD PLUG LOCATIONS
J17
J16
J15
J14 J13 J12 J11
J10
TROUBLESHOOTING & REPAIR
TEST PROCEDURE
1. Remove main input supply power to the
machine.
2. With the 3/8" nut driver, remove the 4
screws that hold the handle to the machine.
3. Remove the rubber gasket (cover seal) from
the lift bail.
4. With the 5/16" nut driver, remove the sheet
metal screws from the case top.
5. With the 5/16" nut driver, remove the
screws holding the right and left case sides.
Remove the case sides by lifting up and
out.
6. Perform
the
Procedure described earlier in this section
of the manual.
Before continuing with the
test procedure, perform the
capacitor discharge proce-
dure to avoid electric shock.
7. After you have completed the capacitor
discharge procedure for all four switch
boards, remove the PC board cover. Use
the 5/16" nut driver.
8. Remove plug J13 from the display board.
9. Place a jumper wire between pins C and D
of wire feeder receptacle #2.
10. Remove the 5 leads ( 3 heavy and 2 small)
T1, T2, T3 from main input contactor CR1.
This is a safety precaution. It prevents
high voltage from being put on the
machine during the test. Wrap tape
around the lead ends to insulate them and
prevent them from touching.
POWER WAVE 450
WARNING