I was doing some work on a blown circuit board and I cam across two identical components I had never seen before. One looks burnt so I think that might be the problem. The whole board is designed to operate at up to 1200 watts so I think it might just be a large ceramic resistor. I'm not sure though. Attached are pictures of the blown one and the normal one. Thanks good part

bad part

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    \$\begingroup\$ Your picture-posting fu isn't too good. No images. You might run a spell check on the title while you're at it. \$\endgroup\$ – Transistor Nov 6 '17 at 15:17
  • \$\begingroup\$ @Transistor my computer decided to post this draft. I fixed it though \$\endgroup\$ – MrSchmuck Nov 6 '17 at 15:31
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    \$\begingroup\$ The 2nd photo shows the resistor without a spring clip. Have you lost it? It is quite important to hold the resistor against the heatsink. \$\endgroup\$ – Steve G Nov 6 '17 at 15:51
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    \$\begingroup\$ those ceramic reisstors can run verrrrry hot, so 'looks burnt' may not be diagnostic. \$\endgroup\$ – Neil_UK Nov 6 '17 at 15:51
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    \$\begingroup\$ Doesn't look blown just hot. I'd check whatever semiconductors it is connected to and see if one of them died. \$\endgroup\$ – JRE Nov 6 '17 at 15:55

They look like your classic ceramic-packaged wire-wound power resisters. Not my first suspect when something fails because they are only slightly more complicated than a rock, very hard to kill.

  • \$\begingroup\$ It looks burned to me. I'm not sure though \$\endgroup\$ – MrSchmuck Nov 6 '17 at 15:43
  • \$\begingroup\$ Easy enough to measure, but I concur, it got hot, but they do that. And those things are normally very, very reliable. I would be looking elsewhere, starting with the power sand. \$\endgroup\$ – Dan Mills Nov 6 '17 at 23:10

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