PRE-POWER CHECKS
TM-246193 Page 32 Invision 352 MPa
8-2. Checking Unit Before Applying Power
! Measure voltage of input capacitors according to Section 8-3 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.
See Section 8-18 for test points and values.
Use Miller Testing Booklet (Part No. 150853) when servicing this unit.
See the Miller Extranet for service memos that may aid in the repair of this product.
Follow the pre-power checklist if any of the following conditions exist:
The symptoms are unknown
The unit is completely inoperative
Visual damage is found on any internal components: capacitors C12 and C13, control board PC1, modules MOD1 and MOD2
or interconnecting board PC2
There is no output or limited output
prepower 2018-08
Notes
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