Miller XMT 450 CC, Техническое руководство, Страница: 41 / 84

TM-257 220 Page 37 XMT 450 CC/CV
SECTION 10 − TROUBLESHOOTING
10-1. Checking Unit Before Applying Power
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See Section 10-11 for test points and values and Section
13 for parts location.
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Use MILLER Testing Booklet (Part No. 150 853) when
servicing this unit.
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See the Miller Extranet for service memos that may aid
in the repair of this product.
!
Measure voltage of input capacitors according to Section 10-2 and be sure voltage is near zero before touching any parts.
!
Before applying power to unit, complete the following checks to avoid causing further damage.
!
Although control board PC1 and power interconnect board PC2 are briefly checked here, more complete tests may be
needed later for these parts. This procedure is simply to get a basic okay to power up unit.
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The pre-power checks should be done 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 C3, C4, C5, and C6 control board PC1, modules PM1, PM2, SR1 or
interconnect board PC2;
there is no output or limited output.
Notes