Red-D-Arc EXTREME 360, Техническое руководство

Страница: 21 / 68

TM-229 409 Page 17 Extreme 360
SECTION 6 − TROUBLESHOOTING
6-1. Checking Unit Before Applying Power
.
See Section 6-24 for test points and values and Section
9 for parts location.
Y Discharge input capacitors according to Section 6-3 and be sure voltage is near zero before touching any parts.
Y
Before applying power to unit, complete the pre-power flowchart in Section 6-2 to avoid causing further damage.
Y Although control/auxiliary power board PC1 and power interconnect board PC2 are briefly checked in the pre-power flowchart, more
complete tests may be needed later for these parts. This procedure is simply to get a basic okay to power up unit.
The pre-power flowchart should be followed if any of the following conditions exist:
the symptoms are unknown;
the unit is completely inoperative;
visual damage is found on any of the following components: capacitors C12 and
C13, control board PC1, IGBT power modules MOD1 and MOD2, interconnecting
board PC2, or input rectifier SR1;
there is no output or limited output.
NOTE