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Jeremy S

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  1. Even with the MOSFETs removed I was still getting a short across the power supply. I also found another burned component, the MOV. I sent it back to the owner un-repaired and they are ordering a replacement. I just didn't feel like tearing the whole damn thing apart to find the problem. I suspect that this unit took a nasty surge.
  2. I was given the power supply/amp from a RW12D to repair. The main symptom was that it was instantly blowing the fuse. Some testing revealed that one of the MOSFETs was shorted, Q401. Has anyone successfully replaced a shorted MOSFET in one of these power supplies and got it working? I'd hate to invest time and money into this supply only to find other underlying problems. When I desoldered the old MOSFETS a few of the leads had some kind of spacer around the leads where they solder to the PCB. Was this part of some internal trace to the board? If this spacer came out on the old leads, am I screwed on soldering a replacement part in? Thanks in advance for any help! Jeremy
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