to Section TOC
to Master TOC
| TROUBLESHOOTING & REPAIR | |
| STATIC SCR/DIODE RECTIFIER BRIDGE TEST (continued) | |
| FIGURE F.11 – CONTROL BOARD | FIGURE F.12 – CONTROL BOARD |
| G2206 PLUG P4 LOCATION | G1575 LEAD LOCATIONS |
Return
Return to Section TOC
Return
Return to Master TOC
Plug P3
R3R CONTROL
G2206 - [ ]
Plug P4 (Removed)
G1 G2 G3
R3R CONTROL
G1575 - [ ]
Return to Section TOC
Return to Master TOC
TEST PROCEDURE
1.Disconnect the main input supply power to the machine.
2.With the 5/16” nut driver, remove the case top and sides and lower the front panel.
3.Disconnect the welding cables from the welding output terminals.
4.Disconnect molex plug P4 from control board G2206. See Figure F.11. If the machine has control board G1575, disconnect the individ- ual gate leads G1, G2, G3, and also lead #204. See Figure F.12.
5.Locate and remove molex plug P5 from snubber board M15370. See Figure F.13. If the machine has snubber board M14215, label and disconnect Lead #204 from the out- put shunt. Be sure to disconnect the #204 lead that runs between the snubber board and the output shunt.
6.Locate and remove lead #204 from resistor R3 (40 ohms, 50 watts). See Figure F.14. On R3 reassembly, resolder this lead.
Return to Section TOC
Return to Master TOC
